Mercurial > hg > truffle
annotate src/cpu/x86/vm/sharedRuntime_x86_64.cpp @ 17121:4a1ee9bebd33
Merge
author | Stefan Anzinger <stefan.anzinger@oracle.com> |
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date | Wed, 17 Sep 2014 08:23:54 -0700 |
parents | 2d6dd2eebd51 |
children | 89152779163c |
rev | line source |
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0 | 1 /* |
14909 | 2 * Copyright (c) 2003, 2012, Oracle and/or its affiliates. All rights reserved. |
0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
4 * | |
5 * This code is free software; you can redistribute it and/or modify it | |
6 * under the terms of the GNU General Public License version 2 only, as | |
7 * published by the Free Software Foundation. | |
8 * | |
9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 * version 2 for more details (a copy is included in the LICENSE file that | |
13 * accompanied this code). | |
14 * | |
15 * You should have received a copy of the GNU General Public License version | |
16 * 2 along with this work; if not, write to the Free Software Foundation, | |
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
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26 #include "asm/macroAssembler.hpp" |
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27 #include "asm/macroAssembler.inline.hpp" |
1972 | 28 #include "code/debugInfoRec.hpp" |
29 #include "code/icBuffer.hpp" | |
30 #include "code/vtableStubs.hpp" | |
31 #include "interpreter/interpreter.hpp" | |
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32 #include "oops/compiledICHolder.hpp" |
1972 | 33 #include "prims/jvmtiRedefineClassesTrace.hpp" |
34 #include "runtime/sharedRuntime.hpp" | |
35 #include "runtime/vframeArray.hpp" | |
36 #include "vmreg_x86.inline.hpp" | |
37 #ifdef COMPILER1 | |
38 #include "c1/c1_Runtime1.hpp" | |
39 #endif | |
40 #ifdef COMPILER2 | |
41 #include "opto/runtime.hpp" | |
42 #endif | |
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43 #ifdef GRAAL |
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44 #include "graal/graalJavaAccess.hpp" |
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45 #endif |
0 | 46 |
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47 #define __ masm-> |
0 | 48 |
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49 const int StackAlignmentInSlots = StackAlignmentInBytes / VMRegImpl::stack_slot_size; |
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50 |
0 | 51 class SimpleRuntimeFrame { |
52 | |
53 public: | |
54 | |
55 // Most of the runtime stubs have this simple frame layout. | |
56 // This class exists to make the layout shared in one place. | |
57 // Offsets are for compiler stack slots, which are jints. | |
58 enum layout { | |
59 // The frame sender code expects that rbp will be in the "natural" place and | |
60 // will override any oopMap setting for it. We must therefore force the layout | |
61 // so that it agrees with the frame sender code. | |
62 rbp_off = frame::arg_reg_save_area_bytes/BytesPerInt, | |
63 rbp_off2, | |
64 return_off, return_off2, | |
65 framesize | |
66 }; | |
67 }; | |
68 | |
69 class RegisterSaver { | |
70 // Capture info about frame layout. Layout offsets are in jint | |
71 // units because compiler frame slots are jints. | |
72 #define DEF_XMM_OFFS(regnum) xmm ## regnum ## _off = xmm_off + (regnum)*16/BytesPerInt, xmm ## regnum ## H_off | |
73 enum layout { | |
74 fpu_state_off = frame::arg_reg_save_area_bytes/BytesPerInt, // fxsave save area | |
75 xmm_off = fpu_state_off + 160/BytesPerInt, // offset in fxsave save area | |
76 DEF_XMM_OFFS(0), | |
77 DEF_XMM_OFFS(1), | |
78 DEF_XMM_OFFS(2), | |
79 DEF_XMM_OFFS(3), | |
80 DEF_XMM_OFFS(4), | |
81 DEF_XMM_OFFS(5), | |
82 DEF_XMM_OFFS(6), | |
83 DEF_XMM_OFFS(7), | |
84 DEF_XMM_OFFS(8), | |
85 DEF_XMM_OFFS(9), | |
86 DEF_XMM_OFFS(10), | |
87 DEF_XMM_OFFS(11), | |
88 DEF_XMM_OFFS(12), | |
89 DEF_XMM_OFFS(13), | |
90 DEF_XMM_OFFS(14), | |
91 DEF_XMM_OFFS(15), | |
92 fpu_state_end = fpu_state_off + ((FPUStateSizeInWords-1)*wordSize / BytesPerInt), | |
93 fpu_stateH_end, | |
94 r15_off, r15H_off, | |
95 r14_off, r14H_off, | |
96 r13_off, r13H_off, | |
97 r12_off, r12H_off, | |
98 r11_off, r11H_off, | |
99 r10_off, r10H_off, | |
100 r9_off, r9H_off, | |
101 r8_off, r8H_off, | |
102 rdi_off, rdiH_off, | |
103 rsi_off, rsiH_off, | |
104 ignore_off, ignoreH_off, // extra copy of rbp | |
105 rsp_off, rspH_off, | |
106 rbx_off, rbxH_off, | |
107 rdx_off, rdxH_off, | |
108 rcx_off, rcxH_off, | |
109 rax_off, raxH_off, | |
110 // 16-byte stack alignment fill word: see MacroAssembler::push/pop_IU_state | |
111 align_off, alignH_off, | |
112 flags_off, flagsH_off, | |
113 // The frame sender code expects that rbp will be in the "natural" place and | |
114 // will override any oopMap setting for it. We must therefore force the layout | |
115 // so that it agrees with the frame sender code. | |
116 rbp_off, rbpH_off, // copy of rbp we will restore | |
117 return_off, returnH_off, // slot for return address | |
118 reg_save_size // size in compiler stack slots | |
119 }; | |
120 | |
121 public: | |
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122 static OopMap* save_live_registers(MacroAssembler* masm, int additional_frame_words, int* total_frame_words, bool save_vectors = false); |
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123 static void restore_live_registers(MacroAssembler* masm, bool restore_vectors = false); |
0 | 124 |
125 // Offsets into the register save area | |
126 // Used by deoptimization when it is managing result register | |
127 // values on its own | |
128 | |
129 static int rax_offset_in_bytes(void) { return BytesPerInt * rax_off; } | |
304 | 130 static int rdx_offset_in_bytes(void) { return BytesPerInt * rdx_off; } |
0 | 131 static int rbx_offset_in_bytes(void) { return BytesPerInt * rbx_off; } |
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132 static int r10_offset_in_bytes(void) { return BytesPerInt * r10_off; } |
0 | 133 static int xmm0_offset_in_bytes(void) { return BytesPerInt * xmm0_off; } |
134 static int return_offset_in_bytes(void) { return BytesPerInt * return_off; } | |
135 | |
136 // During deoptimization only the result registers need to be restored, | |
137 // all the other values have already been extracted. | |
138 static void restore_result_registers(MacroAssembler* masm); | |
139 }; | |
140 | |
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141 OopMap* RegisterSaver::save_live_registers(MacroAssembler* masm, int additional_frame_words, int* total_frame_words, bool save_vectors) { |
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142 int vect_words = 0; |
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143 #ifdef COMPILER2 |
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144 if (save_vectors) { |
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145 assert(UseAVX > 0, "256bit vectors are supported only with AVX"); |
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146 assert(MaxVectorSize == 32, "only 256bit vectors are supported now"); |
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147 // Save upper half of YMM registes |
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148 vect_words = 16 * 16 / wordSize; |
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149 additional_frame_words += vect_words; |
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150 } |
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151 #else |
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152 assert(!save_vectors, "vectors are generated only by C2"); |
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153 #endif |
0 | 154 |
155 // Always make the frame size 16-byte aligned | |
156 int frame_size_in_bytes = round_to(additional_frame_words*wordSize + | |
157 reg_save_size*BytesPerInt, 16); | |
158 // OopMap frame size is in compiler stack slots (jint's) not bytes or words | |
159 int frame_size_in_slots = frame_size_in_bytes / BytesPerInt; | |
160 // The caller will allocate additional_frame_words | |
161 int additional_frame_slots = additional_frame_words*wordSize / BytesPerInt; | |
162 // CodeBlob frame size is in words. | |
163 int frame_size_in_words = frame_size_in_bytes / wordSize; | |
164 *total_frame_words = frame_size_in_words; | |
165 | |
166 // Save registers, fpu state, and flags. | |
167 // We assume caller has already pushed the return address onto the | |
168 // stack, so rsp is 8-byte aligned here. | |
169 // We push rpb twice in this sequence because we want the real rbp | |
170 // to be under the return like a normal enter. | |
171 | |
172 __ enter(); // rsp becomes 16-byte aligned here | |
173 __ push_CPU_state(); // Push a multiple of 16 bytes | |
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174 |
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175 if (vect_words > 0) { |
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176 assert(vect_words*wordSize == 256, ""); |
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177 __ subptr(rsp, 256); // Save upper half of YMM registes |
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178 __ vextractf128h(Address(rsp, 0),xmm0); |
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179 __ vextractf128h(Address(rsp, 16),xmm1); |
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180 __ vextractf128h(Address(rsp, 32),xmm2); |
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181 __ vextractf128h(Address(rsp, 48),xmm3); |
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182 __ vextractf128h(Address(rsp, 64),xmm4); |
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183 __ vextractf128h(Address(rsp, 80),xmm5); |
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184 __ vextractf128h(Address(rsp, 96),xmm6); |
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185 __ vextractf128h(Address(rsp,112),xmm7); |
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186 __ vextractf128h(Address(rsp,128),xmm8); |
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187 __ vextractf128h(Address(rsp,144),xmm9); |
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188 __ vextractf128h(Address(rsp,160),xmm10); |
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189 __ vextractf128h(Address(rsp,176),xmm11); |
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190 __ vextractf128h(Address(rsp,192),xmm12); |
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191 __ vextractf128h(Address(rsp,208),xmm13); |
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192 __ vextractf128h(Address(rsp,224),xmm14); |
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193 __ vextractf128h(Address(rsp,240),xmm15); |
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194 } |
0 | 195 if (frame::arg_reg_save_area_bytes != 0) { |
196 // Allocate argument register save area | |
304 | 197 __ subptr(rsp, frame::arg_reg_save_area_bytes); |
0 | 198 } |
199 | |
200 // Set an oopmap for the call site. This oopmap will map all | |
201 // oop-registers and debug-info registers as callee-saved. This | |
202 // will allow deoptimization at this safepoint to find all possible | |
203 // debug-info recordings, as well as let GC find all oops. | |
204 | |
205 OopMapSet *oop_maps = new OopMapSet(); | |
206 OopMap* map = new OopMap(frame_size_in_slots, 0); | |
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207 |
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208 #define STACK_OFFSET(x) VMRegImpl::stack2reg((x) + additional_frame_slots) |
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209 |
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210 map->set_callee_saved(STACK_OFFSET( rax_off ), rax->as_VMReg()); |
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211 map->set_callee_saved(STACK_OFFSET( rcx_off ), rcx->as_VMReg()); |
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212 map->set_callee_saved(STACK_OFFSET( rdx_off ), rdx->as_VMReg()); |
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213 map->set_callee_saved(STACK_OFFSET( rbx_off ), rbx->as_VMReg()); |
0 | 214 // rbp location is known implicitly by the frame sender code, needs no oopmap |
215 // and the location where rbp was saved by is ignored | |
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216 map->set_callee_saved(STACK_OFFSET( rsi_off ), rsi->as_VMReg()); |
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217 map->set_callee_saved(STACK_OFFSET( rdi_off ), rdi->as_VMReg()); |
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218 map->set_callee_saved(STACK_OFFSET( r8_off ), r8->as_VMReg()); |
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219 map->set_callee_saved(STACK_OFFSET( r9_off ), r9->as_VMReg()); |
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220 map->set_callee_saved(STACK_OFFSET( r10_off ), r10->as_VMReg()); |
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221 map->set_callee_saved(STACK_OFFSET( r11_off ), r11->as_VMReg()); |
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222 map->set_callee_saved(STACK_OFFSET( r12_off ), r12->as_VMReg()); |
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223 map->set_callee_saved(STACK_OFFSET( r13_off ), r13->as_VMReg()); |
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224 map->set_callee_saved(STACK_OFFSET( r14_off ), r14->as_VMReg()); |
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225 map->set_callee_saved(STACK_OFFSET( r15_off ), r15->as_VMReg()); |
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226 map->set_callee_saved(STACK_OFFSET(xmm0_off ), xmm0->as_VMReg()); |
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227 map->set_callee_saved(STACK_OFFSET(xmm1_off ), xmm1->as_VMReg()); |
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228 map->set_callee_saved(STACK_OFFSET(xmm2_off ), xmm2->as_VMReg()); |
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229 map->set_callee_saved(STACK_OFFSET(xmm3_off ), xmm3->as_VMReg()); |
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230 map->set_callee_saved(STACK_OFFSET(xmm4_off ), xmm4->as_VMReg()); |
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231 map->set_callee_saved(STACK_OFFSET(xmm5_off ), xmm5->as_VMReg()); |
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232 map->set_callee_saved(STACK_OFFSET(xmm6_off ), xmm6->as_VMReg()); |
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233 map->set_callee_saved(STACK_OFFSET(xmm7_off ), xmm7->as_VMReg()); |
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234 map->set_callee_saved(STACK_OFFSET(xmm8_off ), xmm8->as_VMReg()); |
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235 map->set_callee_saved(STACK_OFFSET(xmm9_off ), xmm9->as_VMReg()); |
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236 map->set_callee_saved(STACK_OFFSET(xmm10_off), xmm10->as_VMReg()); |
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237 map->set_callee_saved(STACK_OFFSET(xmm11_off), xmm11->as_VMReg()); |
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238 map->set_callee_saved(STACK_OFFSET(xmm12_off), xmm12->as_VMReg()); |
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239 map->set_callee_saved(STACK_OFFSET(xmm13_off), xmm13->as_VMReg()); |
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240 map->set_callee_saved(STACK_OFFSET(xmm14_off), xmm14->as_VMReg()); |
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241 map->set_callee_saved(STACK_OFFSET(xmm15_off), xmm15->as_VMReg()); |
0 | 242 |
243 // %%% These should all be a waste but we'll keep things as they were for now | |
244 if (true) { | |
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245 map->set_callee_saved(STACK_OFFSET( raxH_off ), rax->as_VMReg()->next()); |
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246 map->set_callee_saved(STACK_OFFSET( rcxH_off ), rcx->as_VMReg()->next()); |
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247 map->set_callee_saved(STACK_OFFSET( rdxH_off ), rdx->as_VMReg()->next()); |
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248 map->set_callee_saved(STACK_OFFSET( rbxH_off ), rbx->as_VMReg()->next()); |
0 | 249 // rbp location is known implicitly by the frame sender code, needs no oopmap |
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250 map->set_callee_saved(STACK_OFFSET( rsiH_off ), rsi->as_VMReg()->next()); |
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251 map->set_callee_saved(STACK_OFFSET( rdiH_off ), rdi->as_VMReg()->next()); |
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252 map->set_callee_saved(STACK_OFFSET( r8H_off ), r8->as_VMReg()->next()); |
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253 map->set_callee_saved(STACK_OFFSET( r9H_off ), r9->as_VMReg()->next()); |
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254 map->set_callee_saved(STACK_OFFSET( r10H_off ), r10->as_VMReg()->next()); |
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255 map->set_callee_saved(STACK_OFFSET( r11H_off ), r11->as_VMReg()->next()); |
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256 map->set_callee_saved(STACK_OFFSET( r12H_off ), r12->as_VMReg()->next()); |
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257 map->set_callee_saved(STACK_OFFSET( r13H_off ), r13->as_VMReg()->next()); |
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258 map->set_callee_saved(STACK_OFFSET( r14H_off ), r14->as_VMReg()->next()); |
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259 map->set_callee_saved(STACK_OFFSET( r15H_off ), r15->as_VMReg()->next()); |
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260 map->set_callee_saved(STACK_OFFSET(xmm0H_off ), xmm0->as_VMReg()->next()); |
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261 map->set_callee_saved(STACK_OFFSET(xmm1H_off ), xmm1->as_VMReg()->next()); |
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262 map->set_callee_saved(STACK_OFFSET(xmm2H_off ), xmm2->as_VMReg()->next()); |
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263 map->set_callee_saved(STACK_OFFSET(xmm3H_off ), xmm3->as_VMReg()->next()); |
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264 map->set_callee_saved(STACK_OFFSET(xmm4H_off ), xmm4->as_VMReg()->next()); |
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265 map->set_callee_saved(STACK_OFFSET(xmm5H_off ), xmm5->as_VMReg()->next()); |
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266 map->set_callee_saved(STACK_OFFSET(xmm6H_off ), xmm6->as_VMReg()->next()); |
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267 map->set_callee_saved(STACK_OFFSET(xmm7H_off ), xmm7->as_VMReg()->next()); |
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268 map->set_callee_saved(STACK_OFFSET(xmm8H_off ), xmm8->as_VMReg()->next()); |
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269 map->set_callee_saved(STACK_OFFSET(xmm9H_off ), xmm9->as_VMReg()->next()); |
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270 map->set_callee_saved(STACK_OFFSET(xmm10H_off), xmm10->as_VMReg()->next()); |
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271 map->set_callee_saved(STACK_OFFSET(xmm11H_off), xmm11->as_VMReg()->next()); |
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272 map->set_callee_saved(STACK_OFFSET(xmm12H_off), xmm12->as_VMReg()->next()); |
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273 map->set_callee_saved(STACK_OFFSET(xmm13H_off), xmm13->as_VMReg()->next()); |
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274 map->set_callee_saved(STACK_OFFSET(xmm14H_off), xmm14->as_VMReg()->next()); |
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275 map->set_callee_saved(STACK_OFFSET(xmm15H_off), xmm15->as_VMReg()->next()); |
0 | 276 } |
277 | |
278 return map; | |
279 } | |
280 | |
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281 void RegisterSaver::restore_live_registers(MacroAssembler* masm, bool restore_vectors) { |
0 | 282 if (frame::arg_reg_save_area_bytes != 0) { |
283 // Pop arg register save area | |
304 | 284 __ addptr(rsp, frame::arg_reg_save_area_bytes); |
0 | 285 } |
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286 #ifdef COMPILER2 |
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287 if (restore_vectors) { |
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288 // Restore upper half of YMM registes. |
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289 assert(UseAVX > 0, "256bit vectors are supported only with AVX"); |
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290 assert(MaxVectorSize == 32, "only 256bit vectors are supported now"); |
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291 __ vinsertf128h(xmm0, Address(rsp, 0)); |
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292 __ vinsertf128h(xmm1, Address(rsp, 16)); |
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293 __ vinsertf128h(xmm2, Address(rsp, 32)); |
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294 __ vinsertf128h(xmm3, Address(rsp, 48)); |
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295 __ vinsertf128h(xmm4, Address(rsp, 64)); |
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296 __ vinsertf128h(xmm5, Address(rsp, 80)); |
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297 __ vinsertf128h(xmm6, Address(rsp, 96)); |
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298 __ vinsertf128h(xmm7, Address(rsp,112)); |
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299 __ vinsertf128h(xmm8, Address(rsp,128)); |
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300 __ vinsertf128h(xmm9, Address(rsp,144)); |
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301 __ vinsertf128h(xmm10, Address(rsp,160)); |
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302 __ vinsertf128h(xmm11, Address(rsp,176)); |
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303 __ vinsertf128h(xmm12, Address(rsp,192)); |
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304 __ vinsertf128h(xmm13, Address(rsp,208)); |
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305 __ vinsertf128h(xmm14, Address(rsp,224)); |
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306 __ vinsertf128h(xmm15, Address(rsp,240)); |
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307 __ addptr(rsp, 256); |
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308 } |
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309 #else |
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310 assert(!restore_vectors, "vectors are generated only by C2"); |
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311 #endif |
0 | 312 // Recover CPU state |
313 __ pop_CPU_state(); | |
314 // Get the rbp described implicitly by the calling convention (no oopMap) | |
304 | 315 __ pop(rbp); |
0 | 316 } |
317 | |
318 void RegisterSaver::restore_result_registers(MacroAssembler* masm) { | |
319 | |
320 // Just restore result register. Only used by deoptimization. By | |
321 // now any callee save register that needs to be restored to a c2 | |
322 // caller of the deoptee has been extracted into the vframeArray | |
323 // and will be stuffed into the c2i adapter we create for later | |
324 // restoration so only result registers need to be restored here. | |
325 | |
326 // Restore fp result register | |
327 __ movdbl(xmm0, Address(rsp, xmm0_offset_in_bytes())); | |
328 // Restore integer result register | |
304 | 329 __ movptr(rax, Address(rsp, rax_offset_in_bytes())); |
330 __ movptr(rdx, Address(rsp, rdx_offset_in_bytes())); | |
331 | |
0 | 332 // Pop all of the register save are off the stack except the return address |
304 | 333 __ addptr(rsp, return_offset_in_bytes()); |
0 | 334 } |
335 | |
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336 // Is vector's size (in bytes) bigger than a size saved by default? |
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337 // 16 bytes XMM registers are saved by default using fxsave/fxrstor instructions. |
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338 bool SharedRuntime::is_wide_vector(int size) { |
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339 return size > 16; |
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340 } |
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341 |
0 | 342 // The java_calling_convention describes stack locations as ideal slots on |
343 // a frame with no abi restrictions. Since we must observe abi restrictions | |
344 // (like the placement of the register window) the slots must be biased by | |
345 // the following value. | |
346 static int reg2offset_in(VMReg r) { | |
347 // Account for saved rbp and return address | |
348 // This should really be in_preserve_stack_slots | |
349 return (r->reg2stack() + 4) * VMRegImpl::stack_slot_size; | |
350 } | |
351 | |
352 static int reg2offset_out(VMReg r) { | |
353 return (r->reg2stack() + SharedRuntime::out_preserve_stack_slots()) * VMRegImpl::stack_slot_size; | |
354 } | |
355 | |
356 // --------------------------------------------------------------------------- | |
357 // Read the array of BasicTypes from a signature, and compute where the | |
358 // arguments should go. Values in the VMRegPair regs array refer to 4-byte | |
359 // quantities. Values less than VMRegImpl::stack0 are registers, those above | |
360 // refer to 4-byte stack slots. All stack slots are based off of the stack pointer | |
361 // as framesizes are fixed. | |
362 // VMRegImpl::stack0 refers to the first slot 0(sp). | |
363 // and VMRegImpl::stack0+1 refers to the memory word 4-byes higher. Register | |
364 // up to RegisterImpl::number_of_registers) are the 64-bit | |
365 // integer registers. | |
366 | |
367 // Note: the INPUTS in sig_bt are in units of Java argument words, which are | |
368 // either 32-bit or 64-bit depending on the build. The OUTPUTS are in 32-bit | |
369 // units regardless of build. Of course for i486 there is no 64 bit build | |
370 | |
371 // The Java calling convention is a "shifted" version of the C ABI. | |
372 // By skipping the first C ABI register we can call non-static jni methods | |
373 // with small numbers of arguments without having to shuffle the arguments | |
374 // at all. Since we control the java ABI we ought to at least get some | |
375 // advantage out of it. | |
376 | |
377 int SharedRuntime::java_calling_convention(const BasicType *sig_bt, | |
378 VMRegPair *regs, | |
379 int total_args_passed, | |
380 int is_outgoing) { | |
381 | |
382 // Create the mapping between argument positions and | |
383 // registers. | |
384 static const Register INT_ArgReg[Argument::n_int_register_parameters_j] = { | |
385 j_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4, j_rarg5 | |
386 }; | |
387 static const XMMRegister FP_ArgReg[Argument::n_float_register_parameters_j] = { | |
388 j_farg0, j_farg1, j_farg2, j_farg3, | |
389 j_farg4, j_farg5, j_farg6, j_farg7 | |
390 }; | |
391 | |
392 | |
393 uint int_args = 0; | |
394 uint fp_args = 0; | |
395 uint stk_args = 0; // inc by 2 each time | |
396 | |
397 for (int i = 0; i < total_args_passed; i++) { | |
398 switch (sig_bt[i]) { | |
399 case T_BOOLEAN: | |
400 case T_CHAR: | |
401 case T_BYTE: | |
402 case T_SHORT: | |
403 case T_INT: | |
404 if (int_args < Argument::n_int_register_parameters_j) { | |
405 regs[i].set1(INT_ArgReg[int_args++]->as_VMReg()); | |
406 } else { | |
407 regs[i].set1(VMRegImpl::stack2reg(stk_args)); | |
408 stk_args += 2; | |
409 } | |
410 break; | |
411 case T_VOID: | |
412 // halves of T_LONG or T_DOUBLE | |
413 assert(i != 0 && (sig_bt[i - 1] == T_LONG || sig_bt[i - 1] == T_DOUBLE), "expecting half"); | |
414 regs[i].set_bad(); | |
415 break; | |
416 case T_LONG: | |
417 assert(sig_bt[i + 1] == T_VOID, "expecting half"); | |
418 // fall through | |
419 case T_OBJECT: | |
420 case T_ARRAY: | |
421 case T_ADDRESS: | |
422 if (int_args < Argument::n_int_register_parameters_j) { | |
423 regs[i].set2(INT_ArgReg[int_args++]->as_VMReg()); | |
424 } else { | |
425 regs[i].set2(VMRegImpl::stack2reg(stk_args)); | |
426 stk_args += 2; | |
427 } | |
428 break; | |
429 case T_FLOAT: | |
430 if (fp_args < Argument::n_float_register_parameters_j) { | |
431 regs[i].set1(FP_ArgReg[fp_args++]->as_VMReg()); | |
432 } else { | |
433 regs[i].set1(VMRegImpl::stack2reg(stk_args)); | |
434 stk_args += 2; | |
435 } | |
436 break; | |
437 case T_DOUBLE: | |
438 assert(sig_bt[i + 1] == T_VOID, "expecting half"); | |
439 if (fp_args < Argument::n_float_register_parameters_j) { | |
440 regs[i].set2(FP_ArgReg[fp_args++]->as_VMReg()); | |
441 } else { | |
442 regs[i].set2(VMRegImpl::stack2reg(stk_args)); | |
443 stk_args += 2; | |
444 } | |
445 break; | |
446 default: | |
447 ShouldNotReachHere(); | |
448 break; | |
449 } | |
450 } | |
451 | |
452 return round_to(stk_args, 2); | |
453 } | |
454 | |
455 // Patch the callers callsite with entry to compiled code if it exists. | |
456 static void patch_callers_callsite(MacroAssembler *masm) { | |
457 Label L; | |
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458 __ cmpptr(Address(rbx, in_bytes(Method::code_offset())), (int32_t)NULL_WORD); |
0 | 459 __ jcc(Assembler::equal, L); |
460 | |
461 // Save the current stack pointer | |
304 | 462 __ mov(r13, rsp); |
0 | 463 // Schedule the branch target address early. |
464 // Call into the VM to patch the caller, then jump to compiled callee | |
465 // rax isn't live so capture return address while we easily can | |
304 | 466 __ movptr(rax, Address(rsp, 0)); |
0 | 467 |
468 // align stack so push_CPU_state doesn't fault | |
304 | 469 __ andptr(rsp, -(StackAlignmentInBytes)); |
0 | 470 __ push_CPU_state(); |
471 | |
472 // VM needs caller's callsite | |
473 // VM needs target method | |
474 // This needs to be a long call since we will relocate this adapter to | |
475 // the codeBuffer and it may not reach | |
476 | |
477 // Allocate argument register save area | |
478 if (frame::arg_reg_save_area_bytes != 0) { | |
304 | 479 __ subptr(rsp, frame::arg_reg_save_area_bytes); |
0 | 480 } |
304 | 481 __ mov(c_rarg0, rbx); |
482 __ mov(c_rarg1, rax); | |
0 | 483 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::fixup_callers_callsite))); |
484 | |
485 // De-allocate argument register save area | |
486 if (frame::arg_reg_save_area_bytes != 0) { | |
304 | 487 __ addptr(rsp, frame::arg_reg_save_area_bytes); |
0 | 488 } |
489 | |
490 __ pop_CPU_state(); | |
491 // restore sp | |
304 | 492 __ mov(rsp, r13); |
0 | 493 __ bind(L); |
494 } | |
495 | |
496 | |
497 static void gen_c2i_adapter(MacroAssembler *masm, | |
498 int total_args_passed, | |
499 int comp_args_on_stack, | |
500 const BasicType *sig_bt, | |
501 const VMRegPair *regs, | |
502 Label& skip_fixup) { | |
503 // Before we get into the guts of the C2I adapter, see if we should be here | |
504 // at all. We've come from compiled code and are attempting to jump to the | |
505 // interpreter, which means the caller made a static call to get here | |
506 // (vcalls always get a compiled target if there is one). Check for a | |
507 // compiled target. If there is one, we need to patch the caller's call. | |
508 patch_callers_callsite(masm); | |
509 | |
510 __ bind(skip_fixup); | |
511 | |
512 // Since all args are passed on the stack, total_args_passed * | |
513 // Interpreter::stackElementSize is the space we need. Plus 1 because | |
514 // we also account for the return address location since | |
515 // we store it first rather than hold it in rax across all the shuffling | |
516 | |
1506 | 517 int extraspace = (total_args_passed * Interpreter::stackElementSize) + wordSize; |
0 | 518 |
519 // stack is aligned, keep it that way | |
520 extraspace = round_to(extraspace, 2*wordSize); | |
521 | |
522 // Get return address | |
304 | 523 __ pop(rax); |
0 | 524 |
525 // set senderSP value | |
304 | 526 __ mov(r13, rsp); |
527 | |
528 __ subptr(rsp, extraspace); | |
0 | 529 |
530 // Store the return address in the expected location | |
304 | 531 __ movptr(Address(rsp, 0), rax); |
0 | 532 |
533 // Now write the args into the outgoing interpreter space | |
534 for (int i = 0; i < total_args_passed; i++) { | |
535 if (sig_bt[i] == T_VOID) { | |
536 assert(i > 0 && (sig_bt[i-1] == T_LONG || sig_bt[i-1] == T_DOUBLE), "missing half"); | |
537 continue; | |
538 } | |
539 | |
540 // offset to start parameters | |
1506 | 541 int st_off = (total_args_passed - i) * Interpreter::stackElementSize; |
542 int next_off = st_off - Interpreter::stackElementSize; | |
0 | 543 |
544 // Say 4 args: | |
545 // i st_off | |
546 // 0 32 T_LONG | |
547 // 1 24 T_VOID | |
548 // 2 16 T_OBJECT | |
549 // 3 8 T_BOOL | |
550 // - 0 return address | |
551 // | |
552 // However to make thing extra confusing. Because we can fit a long/double in | |
553 // a single slot on a 64 bt vm and it would be silly to break them up, the interpreter | |
554 // leaves one slot empty and only stores to a single slot. In this case the | |
555 // slot that is occupied is the T_VOID slot. See I said it was confusing. | |
556 | |
557 VMReg r_1 = regs[i].first(); | |
558 VMReg r_2 = regs[i].second(); | |
559 if (!r_1->is_valid()) { | |
560 assert(!r_2->is_valid(), ""); | |
561 continue; | |
562 } | |
563 if (r_1->is_stack()) { | |
564 // memory to memory use rax | |
565 int ld_off = r_1->reg2stack() * VMRegImpl::stack_slot_size + extraspace; | |
566 if (!r_2->is_valid()) { | |
567 // sign extend?? | |
568 __ movl(rax, Address(rsp, ld_off)); | |
304 | 569 __ movptr(Address(rsp, st_off), rax); |
0 | 570 |
571 } else { | |
572 | |
573 __ movq(rax, Address(rsp, ld_off)); | |
574 | |
575 // Two VMREgs|OptoRegs can be T_OBJECT, T_ADDRESS, T_DOUBLE, T_LONG | |
576 // T_DOUBLE and T_LONG use two slots in the interpreter | |
577 if ( sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) { | |
578 // ld_off == LSW, ld_off+wordSize == MSW | |
579 // st_off == MSW, next_off == LSW | |
580 __ movq(Address(rsp, next_off), rax); | |
581 #ifdef ASSERT | |
582 // Overwrite the unused slot with known junk | |
583 __ mov64(rax, CONST64(0xdeadffffdeadaaaa)); | |
304 | 584 __ movptr(Address(rsp, st_off), rax); |
0 | 585 #endif /* ASSERT */ |
586 } else { | |
587 __ movq(Address(rsp, st_off), rax); | |
588 } | |
589 } | |
590 } else if (r_1->is_Register()) { | |
591 Register r = r_1->as_Register(); | |
592 if (!r_2->is_valid()) { | |
593 // must be only an int (or less ) so move only 32bits to slot | |
594 // why not sign extend?? | |
595 __ movl(Address(rsp, st_off), r); | |
596 } else { | |
597 // Two VMREgs|OptoRegs can be T_OBJECT, T_ADDRESS, T_DOUBLE, T_LONG | |
598 // T_DOUBLE and T_LONG use two slots in the interpreter | |
599 if ( sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) { | |
600 // long/double in gpr | |
601 #ifdef ASSERT | |
602 // Overwrite the unused slot with known junk | |
603 __ mov64(rax, CONST64(0xdeadffffdeadaaab)); | |
304 | 604 __ movptr(Address(rsp, st_off), rax); |
0 | 605 #endif /* ASSERT */ |
606 __ movq(Address(rsp, next_off), r); | |
607 } else { | |
304 | 608 __ movptr(Address(rsp, st_off), r); |
0 | 609 } |
610 } | |
611 } else { | |
612 assert(r_1->is_XMMRegister(), ""); | |
613 if (!r_2->is_valid()) { | |
614 // only a float use just part of the slot | |
615 __ movflt(Address(rsp, st_off), r_1->as_XMMRegister()); | |
616 } else { | |
617 #ifdef ASSERT | |
618 // Overwrite the unused slot with known junk | |
619 __ mov64(rax, CONST64(0xdeadffffdeadaaac)); | |
304 | 620 __ movptr(Address(rsp, st_off), rax); |
0 | 621 #endif /* ASSERT */ |
622 __ movdbl(Address(rsp, next_off), r_1->as_XMMRegister()); | |
623 } | |
624 } | |
625 } | |
626 | |
627 // Schedule the branch target address early. | |
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628 __ movptr(rcx, Address(rbx, in_bytes(Method::interpreter_entry_offset()))); |
0 | 629 __ jmp(rcx); |
630 } | |
631 | |
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632 static void range_check(MacroAssembler* masm, Register pc_reg, Register temp_reg, |
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633 address code_start, address code_end, |
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634 Label& L_ok) { |
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635 Label L_fail; |
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636 __ lea(temp_reg, ExternalAddress(code_start)); |
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637 __ cmpptr(pc_reg, temp_reg); |
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638 __ jcc(Assembler::belowEqual, L_fail); |
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639 __ lea(temp_reg, ExternalAddress(code_end)); |
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640 __ cmpptr(pc_reg, temp_reg); |
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641 __ jcc(Assembler::below, L_ok); |
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642 __ bind(L_fail); |
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643 } |
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644 |
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645 void SharedRuntime::gen_i2c_adapter(MacroAssembler *masm, |
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646 int total_args_passed, |
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647 int comp_args_on_stack, |
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648 const BasicType *sig_bt, |
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649 const VMRegPair *regs, |
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650 int frame_extension_argument) { |
0 | 651 |
652 // Note: r13 contains the senderSP on entry. We must preserve it since | |
653 // we may do a i2c -> c2i transition if we lose a race where compiled | |
654 // code goes non-entrant while we get args ready. | |
655 // In addition we use r13 to locate all the interpreter args as | |
656 // we must align the stack to 16 bytes on an i2c entry else we | |
657 // lose alignment we expect in all compiled code and register | |
658 // save code can segv when fxsave instructions find improperly | |
659 // aligned stack pointer. | |
660 | |
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661 // Adapters can be frameless because they do not require the caller |
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662 // to perform additional cleanup work, such as correcting the stack pointer. |
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663 // An i2c adapter is frameless because the *caller* frame, which is interpreted, |
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664 // routinely repairs its own stack pointer (from interpreter_frame_last_sp), |
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665 // even if a callee has modified the stack pointer. |
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666 // A c2i adapter is frameless because the *callee* frame, which is interpreted, |
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667 // routinely repairs its caller's stack pointer (from sender_sp, which is set |
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668 // up via the senderSP register). |
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669 // In other words, if *either* the caller or callee is interpreted, we can |
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670 // get the stack pointer repaired after a call. |
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671 // This is why c2i and i2c adapters cannot be indefinitely composed. |
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672 // In particular, if a c2i adapter were to somehow call an i2c adapter, |
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673 // both caller and callee would be compiled methods, and neither would |
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674 // clean up the stack pointer changes performed by the two adapters. |
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675 // If this happens, control eventually transfers back to the compiled |
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676 // caller, but with an uncorrected stack, causing delayed havoc. |
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677 |
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678 // Pick up the return address |
304 | 679 __ movptr(rax, Address(rsp, 0)); |
0 | 680 |
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681 if (VerifyAdapterCalls && |
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682 (Interpreter::code() != NULL || StubRoutines::code1() != NULL)) { |
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683 // So, let's test for cascading c2i/i2c adapters right now. |
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684 // assert(Interpreter::contains($return_addr) || |
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685 // StubRoutines::contains($return_addr), |
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686 // "i2c adapter must return to an interpreter frame"); |
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687 __ block_comment("verify_i2c { "); |
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688 Label L_ok; |
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689 if (Interpreter::code() != NULL) |
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690 range_check(masm, rax, r11, |
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691 Interpreter::code()->code_start(), Interpreter::code()->code_end(), |
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692 L_ok); |
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693 if (StubRoutines::code1() != NULL) |
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694 range_check(masm, rax, r11, |
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695 StubRoutines::code1()->code_begin(), StubRoutines::code1()->code_end(), |
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696 L_ok); |
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697 if (StubRoutines::code2() != NULL) |
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698 range_check(masm, rax, r11, |
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699 StubRoutines::code2()->code_begin(), StubRoutines::code2()->code_end(), |
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700 L_ok); |
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701 const char* msg = "i2c adapter must return to an interpreter frame"; |
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702 __ block_comment(msg); |
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703 __ stop(msg); |
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704 __ bind(L_ok); |
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705 __ block_comment("} verify_i2ce "); |
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706 } |
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707 |
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708 #ifdef GRAAL |
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709 if (frame_extension_argument != -1) { |
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710 // The frame_extension_argument is an int that describes the |
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711 // expected amount of argument space in the caller frame. If that |
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712 // is greater than total_args_passed then enlarge the caller frame |
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713 // by that amount to ensure deopt works correctly. |
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714 assert(frame_extension_argument < total_args_passed, "out of range"); |
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715 assert(sig_bt[frame_extension_argument] == T_INT, "wrong signature"); |
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716 |
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717 Label done; |
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718 int i = frame_extension_argument; |
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719 int ld_off = (total_args_passed - i)*Interpreter::stackElementSize; |
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720 // Check if anything needs to be done. Too much space is ok. |
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721 __ movl(r13, Address(rsp, ld_off)); |
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722 __ cmpl(r13, total_args_passed); |
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723 __ jcc(Assembler::lessEqual, done); |
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724 // Save the old rsp for the copy code |
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725 __ movptr(r11, rsp); |
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726 // Enlarge the frame |
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727 __ subl(r13, total_args_passed); |
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728 __ shlq(r13, 3); |
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729 __ subptr(rsp, r13); |
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730 |
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731 // Now copy the arguments in reverse order so they don't get |
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732 // overwritten during the copy. |
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733 for (int i = total_args_passed - 1; i >= 0; i--) { |
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734 int ld_off = (total_args_passed - i) * Interpreter::stackElementSize; |
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735 __ movptr(r13, Address(r11, ld_off)); |
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736 __ movptr(Address(rsp, ld_off), r13); |
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737 } |
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738 __ bind(done); |
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739 } |
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740 #else |
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741 assert(frame_extension_argument == -1, "unsupported"); |
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742 #endif |
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743 |
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744 // Must preserve original SP for loading incoming arguments because |
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745 // we need to align the outgoing SP for compiled code. |
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746 __ movptr(r11, rsp); |
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747 |
0 | 748 // Cut-out for having no stack args. Since up to 2 int/oop args are passed |
749 // in registers, we will occasionally have no stack args. | |
750 int comp_words_on_stack = 0; | |
751 if (comp_args_on_stack) { | |
752 // Sig words on the stack are greater-than VMRegImpl::stack0. Those in | |
753 // registers are below. By subtracting stack0, we either get a negative | |
754 // number (all values in registers) or the maximum stack slot accessed. | |
755 | |
756 // Convert 4-byte c2 stack slots to words. | |
757 comp_words_on_stack = round_to(comp_args_on_stack*VMRegImpl::stack_slot_size, wordSize)>>LogBytesPerWord; | |
758 // Round up to miminum stack alignment, in wordSize | |
759 comp_words_on_stack = round_to(comp_words_on_stack, 2); | |
304 | 760 __ subptr(rsp, comp_words_on_stack * wordSize); |
0 | 761 } |
762 | |
763 | |
764 // Ensure compiled code always sees stack at proper alignment | |
304 | 765 __ andptr(rsp, -16); |
0 | 766 |
767 // push the return address and misalign the stack that youngest frame always sees | |
768 // as far as the placement of the call instruction | |
304 | 769 __ push(rax); |
0 | 770 |
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771 // Put saved SP in another register |
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772 const Register saved_sp = rax; |
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773 __ movptr(saved_sp, r11); |
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774 |
0 | 775 // Will jump to the compiled code just as if compiled code was doing it. |
776 // Pre-load the register-jump target early, to schedule it better. | |
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777 __ movptr(r11, Address(rbx, in_bytes(Method::from_compiled_offset()))); |
0 | 778 |
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779 #ifdef GRAAL |
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780 // check if this call should be routed towards a specific entry point |
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781 __ cmpptr(Address(r15_thread, in_bytes(JavaThread::graal_alternate_call_target_offset())), 0); |
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782 Label no_alternative_target; |
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783 __ jcc(Assembler::equal, no_alternative_target); |
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784 __ movptr(r11, Address(r15_thread, in_bytes(JavaThread::graal_alternate_call_target_offset()))); |
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785 __ movptr(Address(r15_thread, in_bytes(JavaThread::graal_alternate_call_target_offset())), 0); |
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786 __ bind(no_alternative_target); |
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787 #endif |
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788 |
0 | 789 // Now generate the shuffle code. Pick up all register args and move the |
790 // rest through the floating point stack top. | |
791 for (int i = 0; i < total_args_passed; i++) { | |
792 if (sig_bt[i] == T_VOID) { | |
793 // Longs and doubles are passed in native word order, but misaligned | |
794 // in the 32-bit build. | |
795 assert(i > 0 && (sig_bt[i-1] == T_LONG || sig_bt[i-1] == T_DOUBLE), "missing half"); | |
796 continue; | |
797 } | |
798 | |
799 // Pick up 0, 1 or 2 words from SP+offset. | |
800 | |
801 assert(!regs[i].second()->is_valid() || regs[i].first()->next() == regs[i].second(), | |
802 "scrambled load targets?"); | |
803 // Load in argument order going down. | |
1506 | 804 int ld_off = (total_args_passed - i)*Interpreter::stackElementSize; |
0 | 805 // Point to interpreter value (vs. tag) |
1506 | 806 int next_off = ld_off - Interpreter::stackElementSize; |
0 | 807 // |
808 // | |
809 // | |
810 VMReg r_1 = regs[i].first(); | |
811 VMReg r_2 = regs[i].second(); | |
812 if (!r_1->is_valid()) { | |
813 assert(!r_2->is_valid(), ""); | |
814 continue; | |
815 } | |
816 if (r_1->is_stack()) { | |
817 // Convert stack slot to an SP offset (+ wordSize to account for return address ) | |
818 int st_off = regs[i].first()->reg2stack()*VMRegImpl::stack_slot_size + wordSize; | |
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819 |
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820 // We can use r13 as a temp here because compiled code doesn't need r13 as an input |
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821 // and if we end up going thru a c2i because of a miss a reasonable value of r13 |
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822 // will be generated. |
0 | 823 if (!r_2->is_valid()) { |
824 // sign extend??? | |
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825 __ movl(r13, Address(saved_sp, ld_off)); |
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826 __ movptr(Address(rsp, st_off), r13); |
0 | 827 } else { |
828 // | |
829 // We are using two optoregs. This can be either T_OBJECT, T_ADDRESS, T_LONG, or T_DOUBLE | |
830 // the interpreter allocates two slots but only uses one for thr T_LONG or T_DOUBLE case | |
831 // So we must adjust where to pick up the data to match the interpreter. | |
832 // | |
833 // Interpreter local[n] == MSW, local[n+1] == LSW however locals | |
834 // are accessed as negative so LSW is at LOW address | |
835 | |
836 // ld_off is MSW so get LSW | |
837 const int offset = (sig_bt[i]==T_LONG||sig_bt[i]==T_DOUBLE)? | |
838 next_off : ld_off; | |
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839 __ movq(r13, Address(saved_sp, offset)); |
0 | 840 // st_off is LSW (i.e. reg.first()) |
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841 __ movq(Address(rsp, st_off), r13); |
0 | 842 } |
843 } else if (r_1->is_Register()) { // Register argument | |
844 Register r = r_1->as_Register(); | |
845 assert(r != rax, "must be different"); | |
846 if (r_2->is_valid()) { | |
847 // | |
848 // We are using two VMRegs. This can be either T_OBJECT, T_ADDRESS, T_LONG, or T_DOUBLE | |
849 // the interpreter allocates two slots but only uses one for thr T_LONG or T_DOUBLE case | |
850 // So we must adjust where to pick up the data to match the interpreter. | |
851 | |
852 const int offset = (sig_bt[i]==T_LONG||sig_bt[i]==T_DOUBLE)? | |
853 next_off : ld_off; | |
854 | |
855 // this can be a misaligned move | |
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856 __ movq(r, Address(saved_sp, offset)); |
0 | 857 } else { |
858 // sign extend and use a full word? | |
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859 __ movl(r, Address(saved_sp, ld_off)); |
0 | 860 } |
861 } else { | |
862 if (!r_2->is_valid()) { | |
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863 __ movflt(r_1->as_XMMRegister(), Address(saved_sp, ld_off)); |
0 | 864 } else { |
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865 __ movdbl(r_1->as_XMMRegister(), Address(saved_sp, next_off)); |
0 | 866 } |
867 } | |
868 } | |
869 | |
870 // 6243940 We might end up in handle_wrong_method if | |
871 // the callee is deoptimized as we race thru here. If that | |
872 // happens we don't want to take a safepoint because the | |
873 // caller frame will look interpreted and arguments are now | |
874 // "compiled" so it is much better to make this transition | |
875 // invisible to the stack walking code. Unfortunately if | |
876 // we try and find the callee by normal means a safepoint | |
877 // is possible. So we stash the desired callee in the thread | |
878 // and the vm will find there should this case occur. | |
879 | |
304 | 880 __ movptr(Address(r15_thread, JavaThread::callee_target_offset()), rbx); |
0 | 881 |
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882 // put Method* where a c2i would expect should we end up there |
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883 // only needed becaus eof c2 resolve stubs return Method* as a result in |
0 | 884 // rax |
304 | 885 __ mov(rax, rbx); |
0 | 886 __ jmp(r11); |
887 } | |
888 | |
889 // --------------------------------------------------------------- | |
890 AdapterHandlerEntry* SharedRuntime::generate_i2c2i_adapters(MacroAssembler *masm, | |
891 int total_args_passed, | |
892 int comp_args_on_stack, | |
893 const BasicType *sig_bt, | |
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894 const VMRegPair *regs, |
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895 AdapterFingerPrint* fingerprint) { |
0 | 896 address i2c_entry = __ pc(); |
897 | |
898 gen_i2c_adapter(masm, total_args_passed, comp_args_on_stack, sig_bt, regs); | |
899 | |
900 // ------------------------------------------------------------------------- | |
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901 // Generate a C2I adapter. On entry we know rbx holds the Method* during calls |
0 | 902 // to the interpreter. The args start out packed in the compiled layout. They |
903 // need to be unpacked into the interpreter layout. This will almost always | |
904 // require some stack space. We grow the current (compiled) stack, then repack | |
905 // the args. We finally end in a jump to the generic interpreter entry point. | |
906 // On exit from the interpreter, the interpreter will restore our SP (lest the | |
907 // compiled code, which relys solely on SP and not RBP, get sick). | |
908 | |
909 address c2i_unverified_entry = __ pc(); | |
910 Label skip_fixup; | |
911 Label ok; | |
912 | |
913 Register holder = rax; | |
914 Register receiver = j_rarg0; | |
915 Register temp = rbx; | |
916 | |
917 { | |
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918 __ load_klass(temp, receiver); |
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919 __ cmpptr(temp, Address(holder, CompiledICHolder::holder_klass_offset())); |
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920 __ movptr(rbx, Address(holder, CompiledICHolder::holder_method_offset())); |
0 | 921 __ jcc(Assembler::equal, ok); |
922 __ jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub())); | |
923 | |
924 __ bind(ok); | |
925 // Method might have been compiled since the call site was patched to | |
926 // interpreted if that is the case treat it as a miss so we can get | |
927 // the call site corrected. | |
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928 __ cmpptr(Address(rbx, in_bytes(Method::code_offset())), (int32_t)NULL_WORD); |
0 | 929 __ jcc(Assembler::equal, skip_fixup); |
930 __ jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub())); | |
931 } | |
932 | |
933 address c2i_entry = __ pc(); | |
934 | |
935 gen_c2i_adapter(masm, total_args_passed, comp_args_on_stack, sig_bt, regs, skip_fixup); | |
936 | |
937 __ flush(); | |
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938 return AdapterHandlerLibrary::new_entry(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry); |
0 | 939 } |
940 | |
941 int SharedRuntime::c_calling_convention(const BasicType *sig_bt, | |
942 VMRegPair *regs, | |
943 int total_args_passed) { | |
944 // We return the amount of VMRegImpl stack slots we need to reserve for all | |
945 // the arguments NOT counting out_preserve_stack_slots. | |
946 | |
947 // NOTE: These arrays will have to change when c1 is ported | |
948 #ifdef _WIN64 | |
949 static const Register INT_ArgReg[Argument::n_int_register_parameters_c] = { | |
950 c_rarg0, c_rarg1, c_rarg2, c_rarg3 | |
951 }; | |
952 static const XMMRegister FP_ArgReg[Argument::n_float_register_parameters_c] = { | |
953 c_farg0, c_farg1, c_farg2, c_farg3 | |
954 }; | |
955 #else | |
956 static const Register INT_ArgReg[Argument::n_int_register_parameters_c] = { | |
957 c_rarg0, c_rarg1, c_rarg2, c_rarg3, c_rarg4, c_rarg5 | |
958 }; | |
959 static const XMMRegister FP_ArgReg[Argument::n_float_register_parameters_c] = { | |
960 c_farg0, c_farg1, c_farg2, c_farg3, | |
961 c_farg4, c_farg5, c_farg6, c_farg7 | |
962 }; | |
963 #endif // _WIN64 | |
964 | |
965 | |
966 uint int_args = 0; | |
967 uint fp_args = 0; | |
968 uint stk_args = 0; // inc by 2 each time | |
969 | |
970 for (int i = 0; i < total_args_passed; i++) { | |
971 switch (sig_bt[i]) { | |
972 case T_BOOLEAN: | |
973 case T_CHAR: | |
974 case T_BYTE: | |
975 case T_SHORT: | |
976 case T_INT: | |
977 if (int_args < Argument::n_int_register_parameters_c) { | |
978 regs[i].set1(INT_ArgReg[int_args++]->as_VMReg()); | |
979 #ifdef _WIN64 | |
980 fp_args++; | |
981 // Allocate slots for callee to stuff register args the stack. | |
982 stk_args += 2; | |
983 #endif | |
984 } else { | |
985 regs[i].set1(VMRegImpl::stack2reg(stk_args)); | |
986 stk_args += 2; | |
987 } | |
988 break; | |
989 case T_LONG: | |
990 assert(sig_bt[i + 1] == T_VOID, "expecting half"); | |
991 // fall through | |
992 case T_OBJECT: | |
993 case T_ARRAY: | |
994 case T_ADDRESS: | |
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995 case T_METADATA: |
0 | 996 if (int_args < Argument::n_int_register_parameters_c) { |
997 regs[i].set2(INT_ArgReg[int_args++]->as_VMReg()); | |
998 #ifdef _WIN64 | |
999 fp_args++; | |
1000 stk_args += 2; | |
1001 #endif | |
1002 } else { | |
1003 regs[i].set2(VMRegImpl::stack2reg(stk_args)); | |
1004 stk_args += 2; | |
1005 } | |
1006 break; | |
1007 case T_FLOAT: | |
1008 if (fp_args < Argument::n_float_register_parameters_c) { | |
1009 regs[i].set1(FP_ArgReg[fp_args++]->as_VMReg()); | |
1010 #ifdef _WIN64 | |
1011 int_args++; | |
1012 // Allocate slots for callee to stuff register args the stack. | |
1013 stk_args += 2; | |
1014 #endif | |
1015 } else { | |
1016 regs[i].set1(VMRegImpl::stack2reg(stk_args)); | |
1017 stk_args += 2; | |
1018 } | |
1019 break; | |
1020 case T_DOUBLE: | |
1021 assert(sig_bt[i + 1] == T_VOID, "expecting half"); | |
1022 if (fp_args < Argument::n_float_register_parameters_c) { | |
1023 regs[i].set2(FP_ArgReg[fp_args++]->as_VMReg()); | |
1024 #ifdef _WIN64 | |
1025 int_args++; | |
1026 // Allocate slots for callee to stuff register args the stack. | |
1027 stk_args += 2; | |
1028 #endif | |
1029 } else { | |
1030 regs[i].set2(VMRegImpl::stack2reg(stk_args)); | |
1031 stk_args += 2; | |
1032 } | |
1033 break; | |
1034 case T_VOID: // Halves of longs and doubles | |
1035 assert(i != 0 && (sig_bt[i - 1] == T_LONG || sig_bt[i - 1] == T_DOUBLE), "expecting half"); | |
1036 regs[i].set_bad(); | |
1037 break; | |
1038 default: | |
1039 ShouldNotReachHere(); | |
1040 break; | |
1041 } | |
1042 } | |
1043 #ifdef _WIN64 | |
1044 // windows abi requires that we always allocate enough stack space | |
1045 // for 4 64bit registers to be stored down. | |
1046 if (stk_args < 8) { | |
1047 stk_args = 8; | |
1048 } | |
1049 #endif // _WIN64 | |
1050 | |
1051 return stk_args; | |
1052 } | |
1053 | |
1054 // On 64 bit we will store integer like items to the stack as | |
1055 // 64 bits items (sparc abi) even though java would only store | |
1056 // 32bits for a parameter. On 32bit it will simply be 32 bits | |
1057 // So this routine will do 32->32 on 32bit and 32->64 on 64bit | |
1058 static void move32_64(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
1059 if (src.first()->is_stack()) { | |
1060 if (dst.first()->is_stack()) { | |
1061 // stack to stack | |
1062 __ movslq(rax, Address(rbp, reg2offset_in(src.first()))); | |
1063 __ movq(Address(rsp, reg2offset_out(dst.first())), rax); | |
1064 } else { | |
1065 // stack to reg | |
1066 __ movslq(dst.first()->as_Register(), Address(rbp, reg2offset_in(src.first()))); | |
1067 } | |
1068 } else if (dst.first()->is_stack()) { | |
1069 // reg to stack | |
1070 // Do we really have to sign extend??? | |
1071 // __ movslq(src.first()->as_Register(), src.first()->as_Register()); | |
1072 __ movq(Address(rsp, reg2offset_out(dst.first())), src.first()->as_Register()); | |
1073 } else { | |
1074 // Do we really have to sign extend??? | |
1075 // __ movslq(dst.first()->as_Register(), src.first()->as_Register()); | |
1076 if (dst.first() != src.first()) { | |
1077 __ movq(dst.first()->as_Register(), src.first()->as_Register()); | |
1078 } | |
1079 } | |
1080 } | |
1081 | |
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1082 static void move_ptr(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { |
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1083 if (src.first()->is_stack()) { |
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1084 if (dst.first()->is_stack()) { |
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1085 // stack to stack |
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1086 __ movq(rax, Address(rbp, reg2offset_in(src.first()))); |
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1087 __ movq(Address(rsp, reg2offset_out(dst.first())), rax); |
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1088 } else { |
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1089 // stack to reg |
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1090 __ movq(dst.first()->as_Register(), Address(rbp, reg2offset_in(src.first()))); |
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1091 } |
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1092 } else if (dst.first()->is_stack()) { |
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1093 // reg to stack |
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1094 __ movq(Address(rsp, reg2offset_out(dst.first())), src.first()->as_Register()); |
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1095 } else { |
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1096 if (dst.first() != src.first()) { |
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1097 __ movq(dst.first()->as_Register(), src.first()->as_Register()); |
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1098 } |
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1099 } |
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1100 } |
0 | 1101 |
1102 // An oop arg. Must pass a handle not the oop itself | |
1103 static void object_move(MacroAssembler* masm, | |
1104 OopMap* map, | |
1105 int oop_handle_offset, | |
1106 int framesize_in_slots, | |
1107 VMRegPair src, | |
1108 VMRegPair dst, | |
1109 bool is_receiver, | |
1110 int* receiver_offset) { | |
1111 | |
1112 // must pass a handle. First figure out the location we use as a handle | |
1113 | |
1114 Register rHandle = dst.first()->is_stack() ? rax : dst.first()->as_Register(); | |
1115 | |
1116 // See if oop is NULL if it is we need no handle | |
1117 | |
1118 if (src.first()->is_stack()) { | |
1119 | |
1120 // Oop is already on the stack as an argument | |
1121 int offset_in_older_frame = src.first()->reg2stack() + SharedRuntime::out_preserve_stack_slots(); | |
1122 map->set_oop(VMRegImpl::stack2reg(offset_in_older_frame + framesize_in_slots)); | |
1123 if (is_receiver) { | |
1124 *receiver_offset = (offset_in_older_frame + framesize_in_slots) * VMRegImpl::stack_slot_size; | |
1125 } | |
1126 | |
304 | 1127 __ cmpptr(Address(rbp, reg2offset_in(src.first())), (int32_t)NULL_WORD); |
1128 __ lea(rHandle, Address(rbp, reg2offset_in(src.first()))); | |
0 | 1129 // conditionally move a NULL |
304 | 1130 __ cmovptr(Assembler::equal, rHandle, Address(rbp, reg2offset_in(src.first()))); |
0 | 1131 } else { |
1132 | |
1133 // Oop is in an a register we must store it to the space we reserve | |
1134 // on the stack for oop_handles and pass a handle if oop is non-NULL | |
1135 | |
1136 const Register rOop = src.first()->as_Register(); | |
1137 int oop_slot; | |
1138 if (rOop == j_rarg0) | |
1139 oop_slot = 0; | |
1140 else if (rOop == j_rarg1) | |
1141 oop_slot = 1; | |
1142 else if (rOop == j_rarg2) | |
1143 oop_slot = 2; | |
1144 else if (rOop == j_rarg3) | |
1145 oop_slot = 3; | |
1146 else if (rOop == j_rarg4) | |
1147 oop_slot = 4; | |
1148 else { | |
1149 assert(rOop == j_rarg5, "wrong register"); | |
1150 oop_slot = 5; | |
1151 } | |
1152 | |
1153 oop_slot = oop_slot * VMRegImpl::slots_per_word + oop_handle_offset; | |
1154 int offset = oop_slot*VMRegImpl::stack_slot_size; | |
1155 | |
1156 map->set_oop(VMRegImpl::stack2reg(oop_slot)); | |
1157 // Store oop in handle area, may be NULL | |
304 | 1158 __ movptr(Address(rsp, offset), rOop); |
0 | 1159 if (is_receiver) { |
1160 *receiver_offset = offset; | |
1161 } | |
1162 | |
304 | 1163 __ cmpptr(rOop, (int32_t)NULL_WORD); |
1164 __ lea(rHandle, Address(rsp, offset)); | |
0 | 1165 // conditionally move a NULL from the handle area where it was just stored |
304 | 1166 __ cmovptr(Assembler::equal, rHandle, Address(rsp, offset)); |
0 | 1167 } |
1168 | |
1169 // If arg is on the stack then place it otherwise it is already in correct reg. | |
1170 if (dst.first()->is_stack()) { | |
304 | 1171 __ movptr(Address(rsp, reg2offset_out(dst.first())), rHandle); |
0 | 1172 } |
1173 } | |
1174 | |
1175 // A float arg may have to do float reg int reg conversion | |
1176 static void float_move(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
1177 assert(!src.second()->is_valid() && !dst.second()->is_valid(), "bad float_move"); | |
1178 | |
1179 // The calling conventions assures us that each VMregpair is either | |
1180 // all really one physical register or adjacent stack slots. | |
1181 // This greatly simplifies the cases here compared to sparc. | |
1182 | |
1183 if (src.first()->is_stack()) { | |
1184 if (dst.first()->is_stack()) { | |
1185 __ movl(rax, Address(rbp, reg2offset_in(src.first()))); | |
304 | 1186 __ movptr(Address(rsp, reg2offset_out(dst.first())), rax); |
0 | 1187 } else { |
1188 // stack to reg | |
1189 assert(dst.first()->is_XMMRegister(), "only expect xmm registers as parameters"); | |
1190 __ movflt(dst.first()->as_XMMRegister(), Address(rbp, reg2offset_in(src.first()))); | |
1191 } | |
1192 } else if (dst.first()->is_stack()) { | |
1193 // reg to stack | |
1194 assert(src.first()->is_XMMRegister(), "only expect xmm registers as parameters"); | |
1195 __ movflt(Address(rsp, reg2offset_out(dst.first())), src.first()->as_XMMRegister()); | |
1196 } else { | |
1197 // reg to reg | |
1198 // In theory these overlap but the ordering is such that this is likely a nop | |
1199 if ( src.first() != dst.first()) { | |
1200 __ movdbl(dst.first()->as_XMMRegister(), src.first()->as_XMMRegister()); | |
1201 } | |
1202 } | |
1203 } | |
1204 | |
1205 // A long move | |
1206 static void long_move(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
1207 | |
1208 // The calling conventions assures us that each VMregpair is either | |
1209 // all really one physical register or adjacent stack slots. | |
1210 // This greatly simplifies the cases here compared to sparc. | |
1211 | |
1212 if (src.is_single_phys_reg() ) { | |
1213 if (dst.is_single_phys_reg()) { | |
1214 if (dst.first() != src.first()) { | |
304 | 1215 __ mov(dst.first()->as_Register(), src.first()->as_Register()); |
0 | 1216 } |
1217 } else { | |
1218 assert(dst.is_single_reg(), "not a stack pair"); | |
1219 __ movq(Address(rsp, reg2offset_out(dst.first())), src.first()->as_Register()); | |
1220 } | |
1221 } else if (dst.is_single_phys_reg()) { | |
1222 assert(src.is_single_reg(), "not a stack pair"); | |
1223 __ movq(dst.first()->as_Register(), Address(rbp, reg2offset_out(src.first()))); | |
1224 } else { | |
1225 assert(src.is_single_reg() && dst.is_single_reg(), "not stack pairs"); | |
1226 __ movq(rax, Address(rbp, reg2offset_in(src.first()))); | |
1227 __ movq(Address(rsp, reg2offset_out(dst.first())), rax); | |
1228 } | |
1229 } | |
1230 | |
1231 // A double move | |
1232 static void double_move(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
1233 | |
1234 // The calling conventions assures us that each VMregpair is either | |
1235 // all really one physical register or adjacent stack slots. | |
1236 // This greatly simplifies the cases here compared to sparc. | |
1237 | |
1238 if (src.is_single_phys_reg() ) { | |
1239 if (dst.is_single_phys_reg()) { | |
1240 // In theory these overlap but the ordering is such that this is likely a nop | |
1241 if ( src.first() != dst.first()) { | |
1242 __ movdbl(dst.first()->as_XMMRegister(), src.first()->as_XMMRegister()); | |
1243 } | |
1244 } else { | |
1245 assert(dst.is_single_reg(), "not a stack pair"); | |
1246 __ movdbl(Address(rsp, reg2offset_out(dst.first())), src.first()->as_XMMRegister()); | |
1247 } | |
1248 } else if (dst.is_single_phys_reg()) { | |
1249 assert(src.is_single_reg(), "not a stack pair"); | |
1250 __ movdbl(dst.first()->as_XMMRegister(), Address(rbp, reg2offset_out(src.first()))); | |
1251 } else { | |
1252 assert(src.is_single_reg() && dst.is_single_reg(), "not stack pairs"); | |
1253 __ movq(rax, Address(rbp, reg2offset_in(src.first()))); | |
1254 __ movq(Address(rsp, reg2offset_out(dst.first())), rax); | |
1255 } | |
1256 } | |
1257 | |
1258 | |
1259 void SharedRuntime::save_native_result(MacroAssembler *masm, BasicType ret_type, int frame_slots) { | |
1260 // We always ignore the frame_slots arg and just use the space just below frame pointer | |
1261 // which by this time is free to use | |
1262 switch (ret_type) { | |
1263 case T_FLOAT: | |
1264 __ movflt(Address(rbp, -wordSize), xmm0); | |
1265 break; | |
1266 case T_DOUBLE: | |
1267 __ movdbl(Address(rbp, -wordSize), xmm0); | |
1268 break; | |
1269 case T_VOID: break; | |
1270 default: { | |
304 | 1271 __ movptr(Address(rbp, -wordSize), rax); |
0 | 1272 } |
1273 } | |
1274 } | |
1275 | |
1276 void SharedRuntime::restore_native_result(MacroAssembler *masm, BasicType ret_type, int frame_slots) { | |
1277 // We always ignore the frame_slots arg and just use the space just below frame pointer | |
1278 // which by this time is free to use | |
1279 switch (ret_type) { | |
1280 case T_FLOAT: | |
1281 __ movflt(xmm0, Address(rbp, -wordSize)); | |
1282 break; | |
1283 case T_DOUBLE: | |
1284 __ movdbl(xmm0, Address(rbp, -wordSize)); | |
1285 break; | |
1286 case T_VOID: break; | |
1287 default: { | |
304 | 1288 __ movptr(rax, Address(rbp, -wordSize)); |
0 | 1289 } |
1290 } | |
1291 } | |
1292 | |
1293 static void save_args(MacroAssembler *masm, int arg_count, int first_arg, VMRegPair *args) { | |
1294 for ( int i = first_arg ; i < arg_count ; i++ ) { | |
1295 if (args[i].first()->is_Register()) { | |
304 | 1296 __ push(args[i].first()->as_Register()); |
0 | 1297 } else if (args[i].first()->is_XMMRegister()) { |
304 | 1298 __ subptr(rsp, 2*wordSize); |
0 | 1299 __ movdbl(Address(rsp, 0), args[i].first()->as_XMMRegister()); |
1300 } | |
1301 } | |
1302 } | |
1303 | |
1304 static void restore_args(MacroAssembler *masm, int arg_count, int first_arg, VMRegPair *args) { | |
1305 for ( int i = arg_count - 1 ; i >= first_arg ; i-- ) { | |
1306 if (args[i].first()->is_Register()) { | |
304 | 1307 __ pop(args[i].first()->as_Register()); |
0 | 1308 } else if (args[i].first()->is_XMMRegister()) { |
1309 __ movdbl(args[i].first()->as_XMMRegister(), Address(rsp, 0)); | |
304 | 1310 __ addptr(rsp, 2*wordSize); |
0 | 1311 } |
1312 } | |
1313 } | |
1314 | |
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1315 |
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1316 static void save_or_restore_arguments(MacroAssembler* masm, |
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1317 const int stack_slots, |
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1318 const int total_in_args, |
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1319 const int arg_save_area, |
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1320 OopMap* map, |
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1321 VMRegPair* in_regs, |
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1322 BasicType* in_sig_bt) { |
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1323 // if map is non-NULL then the code should store the values, |
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1324 // otherwise it should load them. |
5905 | 1325 int slot = arg_save_area; |
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1326 // Save down double word first |
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1327 for ( int i = 0; i < total_in_args; i++) { |
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1328 if (in_regs[i].first()->is_XMMRegister() && in_sig_bt[i] == T_DOUBLE) { |
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1329 int offset = slot * VMRegImpl::stack_slot_size; |
5905 | 1330 slot += VMRegImpl::slots_per_word; |
1331 assert(slot <= stack_slots, "overflow"); | |
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1332 if (map != NULL) { |
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1333 __ movdbl(Address(rsp, offset), in_regs[i].first()->as_XMMRegister()); |
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1334 } else { |
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1335 __ movdbl(in_regs[i].first()->as_XMMRegister(), Address(rsp, offset)); |
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1336 } |
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1337 } |
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1338 if (in_regs[i].first()->is_Register() && |
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1339 (in_sig_bt[i] == T_LONG || in_sig_bt[i] == T_ARRAY)) { |
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1340 int offset = slot * VMRegImpl::stack_slot_size; |
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1341 if (map != NULL) { |
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1342 __ movq(Address(rsp, offset), in_regs[i].first()->as_Register()); |
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1343 if (in_sig_bt[i] == T_ARRAY) { |
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1344 map->set_oop(VMRegImpl::stack2reg(slot));; |
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1345 } |
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1346 } else { |
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1347 __ movq(in_regs[i].first()->as_Register(), Address(rsp, offset)); |
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1348 } |
5907 | 1349 slot += VMRegImpl::slots_per_word; |
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1350 } |
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1351 } |
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1352 // Save or restore single word registers |
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1353 for ( int i = 0; i < total_in_args; i++) { |
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1354 if (in_regs[i].first()->is_Register()) { |
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1355 int offset = slot * VMRegImpl::stack_slot_size; |
5905 | 1356 slot++; |
1357 assert(slot <= stack_slots, "overflow"); | |
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1358 |
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1359 // Value is in an input register pass we must flush it to the stack |
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1360 const Register reg = in_regs[i].first()->as_Register(); |
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1361 switch (in_sig_bt[i]) { |
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1362 case T_BOOLEAN: |
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1363 case T_CHAR: |
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1364 case T_BYTE: |
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1365 case T_SHORT: |
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1366 case T_INT: |
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1367 if (map != NULL) { |
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1368 __ movl(Address(rsp, offset), reg); |
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1369 } else { |
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1370 __ movl(reg, Address(rsp, offset)); |
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1371 } |
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1372 break; |
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1373 case T_ARRAY: |
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1374 case T_LONG: |
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1375 // handled above |
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1376 break; |
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1377 case T_OBJECT: |
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1378 default: ShouldNotReachHere(); |
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1379 } |
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1380 } else if (in_regs[i].first()->is_XMMRegister()) { |
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1381 if (in_sig_bt[i] == T_FLOAT) { |
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1382 int offset = slot * VMRegImpl::stack_slot_size; |
5905 | 1383 slot++; |
1384 assert(slot <= stack_slots, "overflow"); | |
4873
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1385 if (map != NULL) { |
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1386 __ movflt(Address(rsp, offset), in_regs[i].first()->as_XMMRegister()); |
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1387 } else { |
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1388 __ movflt(in_regs[i].first()->as_XMMRegister(), Address(rsp, offset)); |
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1389 } |
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1390 } |
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1391 } else if (in_regs[i].first()->is_stack()) { |
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1392 if (in_sig_bt[i] == T_ARRAY && map != NULL) { |
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1393 int offset_in_older_frame = in_regs[i].first()->reg2stack() + SharedRuntime::out_preserve_stack_slots(); |
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1394 map->set_oop(VMRegImpl::stack2reg(offset_in_older_frame + stack_slots)); |
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1395 } |
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1396 } |
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1397 } |
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1398 } |
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1399 |
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1400 |
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1401 // Check GC_locker::needs_gc and enter the runtime if it's true. This |
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1402 // keeps a new JNI critical region from starting until a GC has been |
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1403 // forced. Save down any oops in registers and describe them in an |
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1404 // OopMap. |
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1405 static void check_needs_gc_for_critical_native(MacroAssembler* masm, |
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1406 int stack_slots, |
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1407 int total_c_args, |
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1408 int total_in_args, |
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1409 int arg_save_area, |
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1410 OopMapSet* oop_maps, |
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1411 VMRegPair* in_regs, |
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1412 BasicType* in_sig_bt) { |
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1413 __ block_comment("check GC_locker::needs_gc"); |
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1414 Label cont; |
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1415 __ cmp8(ExternalAddress((address)GC_locker::needs_gc_address()), false); |
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1416 __ jcc(Assembler::equal, cont); |
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1417 |
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1418 // Save down any incoming oops and call into the runtime to halt for a GC |
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1419 |
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1420 OopMap* map = new OopMap(stack_slots * 2, 0 /* arg_slots*/); |
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1421 save_or_restore_arguments(masm, stack_slots, total_in_args, |
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1422 arg_save_area, map, in_regs, in_sig_bt); |
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1423 |
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1424 address the_pc = __ pc(); |
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1425 oop_maps->add_gc_map( __ offset(), map); |
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1426 __ set_last_Java_frame(rsp, noreg, the_pc); |
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1427 |
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1428 __ block_comment("block_for_jni_critical"); |
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1429 __ movptr(c_rarg0, r15_thread); |
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1430 __ mov(r12, rsp); // remember sp |
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1431 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows |
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1432 __ andptr(rsp, -16); // align stack as required by ABI |
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1433 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::block_for_jni_critical))); |
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1434 __ mov(rsp, r12); // restore sp |
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1435 __ reinit_heapbase(); |
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1436 |
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1437 __ reset_last_Java_frame(false, true); |
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1438 |
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1439 save_or_restore_arguments(masm, stack_slots, total_in_args, |
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1440 arg_save_area, NULL, in_regs, in_sig_bt); |
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1441 |
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1442 __ bind(cont); |
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1443 #ifdef ASSERT |
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1444 if (StressCriticalJNINatives) { |
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1445 // Stress register saving |
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1446 OopMap* map = new OopMap(stack_slots * 2, 0 /* arg_slots*/); |
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1447 save_or_restore_arguments(masm, stack_slots, total_in_args, |
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1448 arg_save_area, map, in_regs, in_sig_bt); |
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1449 // Destroy argument registers |
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1450 for (int i = 0; i < total_in_args - 1; i++) { |
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1451 if (in_regs[i].first()->is_Register()) { |
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1452 const Register reg = in_regs[i].first()->as_Register(); |
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1453 __ xorptr(reg, reg); |
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1454 } else if (in_regs[i].first()->is_XMMRegister()) { |
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1455 __ xorpd(in_regs[i].first()->as_XMMRegister(), in_regs[i].first()->as_XMMRegister()); |
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1456 } else if (in_regs[i].first()->is_FloatRegister()) { |
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1457 ShouldNotReachHere(); |
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1458 } else if (in_regs[i].first()->is_stack()) { |
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1459 // Nothing to do |
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1460 } else { |
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1461 ShouldNotReachHere(); |
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1462 } |
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1463 if (in_sig_bt[i] == T_LONG || in_sig_bt[i] == T_DOUBLE) { |
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1464 i++; |
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1465 } |
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1466 } |
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1467 |
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1468 save_or_restore_arguments(masm, stack_slots, total_in_args, |
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1469 arg_save_area, NULL, in_regs, in_sig_bt); |
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1470 } |
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1471 #endif |
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1472 } |
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1473 |
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1474 // Unpack an array argument into a pointer to the body and the length |
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1475 // if the array is non-null, otherwise pass 0 for both. |
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1476 static void unpack_array_argument(MacroAssembler* masm, VMRegPair reg, BasicType in_elem_type, VMRegPair body_arg, VMRegPair length_arg) { |
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1477 Register tmp_reg = rax; |
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1478 assert(!body_arg.first()->is_Register() || body_arg.first()->as_Register() != tmp_reg, |
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1479 "possible collision"); |
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1480 assert(!length_arg.first()->is_Register() || length_arg.first()->as_Register() != tmp_reg, |
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1481 "possible collision"); |
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1482 |
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1483 __ block_comment("unpack_array_argument {"); |
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1484 |
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1485 // Pass the length, ptr pair |
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1486 Label is_null, done; |
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1487 VMRegPair tmp; |
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1488 tmp.set_ptr(tmp_reg->as_VMReg()); |
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1489 if (reg.first()->is_stack()) { |
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1490 // Load the arg up from the stack |
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1491 move_ptr(masm, reg, tmp); |
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1492 reg = tmp; |
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1493 } |
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1494 __ testptr(reg.first()->as_Register(), reg.first()->as_Register()); |
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1495 __ jccb(Assembler::equal, is_null); |
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1496 __ lea(tmp_reg, Address(reg.first()->as_Register(), arrayOopDesc::base_offset_in_bytes(in_elem_type))); |
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1497 move_ptr(masm, tmp, body_arg); |
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1498 // load the length relative to the body. |
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1499 __ movl(tmp_reg, Address(tmp_reg, arrayOopDesc::length_offset_in_bytes() - |
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1500 arrayOopDesc::base_offset_in_bytes(in_elem_type))); |
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1501 move32_64(masm, tmp, length_arg); |
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1502 __ jmpb(done); |
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1503 __ bind(is_null); |
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1504 // Pass zeros |
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1505 __ xorptr(tmp_reg, tmp_reg); |
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1506 move_ptr(masm, tmp, body_arg); |
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1507 move32_64(masm, tmp, length_arg); |
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1508 __ bind(done); |
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1509 |
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1510 __ block_comment("} unpack_array_argument"); |
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1511 } |
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1512 |
5905 | 1513 |
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1514 // Different signatures may require very different orders for the move |
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1515 // to avoid clobbering other arguments. There's no simple way to |
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1516 // order them safely. Compute a safe order for issuing stores and |
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1517 // break any cycles in those stores. This code is fairly general but |
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1518 // it's not necessary on the other platforms so we keep it in the |
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1519 // platform dependent code instead of moving it into a shared file. |
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1520 // (See bugs 7013347 & 7145024.) |
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1521 // Note that this code is specific to LP64. |
5905 | 1522 class ComputeMoveOrder: public StackObj { |
1523 class MoveOperation: public ResourceObj { | |
1524 friend class ComputeMoveOrder; | |
1525 private: | |
1526 VMRegPair _src; | |
1527 VMRegPair _dst; | |
1528 int _src_index; | |
1529 int _dst_index; | |
1530 bool _processed; | |
1531 MoveOperation* _next; | |
1532 MoveOperation* _prev; | |
1533 | |
1534 static int get_id(VMRegPair r) { | |
1535 return r.first()->value(); | |
1536 } | |
1537 | |
1538 public: | |
1539 MoveOperation(int src_index, VMRegPair src, int dst_index, VMRegPair dst): | |
1540 _src(src) | |
1541 , _src_index(src_index) | |
1542 , _dst(dst) | |
1543 , _dst_index(dst_index) | |
1544 , _next(NULL) | |
1545 , _prev(NULL) | |
1546 , _processed(false) { | |
1547 } | |
1548 | |
1549 VMRegPair src() const { return _src; } | |
1550 int src_id() const { return get_id(src()); } | |
1551 int src_index() const { return _src_index; } | |
1552 VMRegPair dst() const { return _dst; } | |
1553 void set_dst(int i, VMRegPair dst) { _dst_index = i, _dst = dst; } | |
1554 int dst_index() const { return _dst_index; } | |
1555 int dst_id() const { return get_id(dst()); } | |
1556 MoveOperation* next() const { return _next; } | |
1557 MoveOperation* prev() const { return _prev; } | |
1558 void set_processed() { _processed = true; } | |
1559 bool is_processed() const { return _processed; } | |
1560 | |
1561 // insert | |
1562 void break_cycle(VMRegPair temp_register) { | |
1563 // create a new store following the last store | |
1564 // to move from the temp_register to the original | |
1565 MoveOperation* new_store = new MoveOperation(-1, temp_register, dst_index(), dst()); | |
1566 | |
1567 // break the cycle of links and insert new_store at the end | |
1568 // break the reverse link. | |
1569 MoveOperation* p = prev(); | |
1570 assert(p->next() == this, "must be"); | |
1571 _prev = NULL; | |
1572 p->_next = new_store; | |
1573 new_store->_prev = p; | |
1574 | |
1575 // change the original store to save it's value in the temp. | |
1576 set_dst(-1, temp_register); | |
1577 } | |
1578 | |
1579 void link(GrowableArray<MoveOperation*>& killer) { | |
1580 // link this store in front the store that it depends on | |
1581 MoveOperation* n = killer.at_grow(src_id(), NULL); | |
1582 if (n != NULL) { | |
1583 assert(_next == NULL && n->_prev == NULL, "shouldn't have been set yet"); | |
1584 _next = n; | |
1585 n->_prev = this; | |
1586 } | |
1587 } | |
1588 }; | |
1589 | |
1590 private: | |
1591 GrowableArray<MoveOperation*> edges; | |
1592 | |
1593 public: | |
1594 ComputeMoveOrder(int total_in_args, VMRegPair* in_regs, int total_c_args, VMRegPair* out_regs, | |
1595 BasicType* in_sig_bt, GrowableArray<int>& arg_order, VMRegPair tmp_vmreg) { | |
1596 // Move operations where the dest is the stack can all be | |
1597 // scheduled first since they can't interfere with the other moves. | |
1598 for (int i = total_in_args - 1, c_arg = total_c_args - 1; i >= 0; i--, c_arg--) { | |
1599 if (in_sig_bt[i] == T_ARRAY) { | |
1600 c_arg--; | |
1601 if (out_regs[c_arg].first()->is_stack() && | |
1602 out_regs[c_arg + 1].first()->is_stack()) { | |
1603 arg_order.push(i); | |
1604 arg_order.push(c_arg); | |
1605 } else { | |
1606 if (out_regs[c_arg].first()->is_stack() || | |
1607 in_regs[i].first() == out_regs[c_arg].first()) { | |
1608 add_edge(i, in_regs[i].first(), c_arg, out_regs[c_arg + 1]); | |
1609 } else { | |
1610 add_edge(i, in_regs[i].first(), c_arg, out_regs[c_arg]); | |
1611 } | |
1612 } | |
1613 } else if (in_sig_bt[i] == T_VOID) { | |
1614 arg_order.push(i); | |
1615 arg_order.push(c_arg); | |
1616 } else { | |
1617 if (out_regs[c_arg].first()->is_stack() || | |
1618 in_regs[i].first() == out_regs[c_arg].first()) { | |
1619 arg_order.push(i); | |
1620 arg_order.push(c_arg); | |
1621 } else { | |
1622 add_edge(i, in_regs[i].first(), c_arg, out_regs[c_arg]); | |
1623 } | |
1624 } | |
1625 } | |
1626 // Break any cycles in the register moves and emit the in the | |
1627 // proper order. | |
1628 GrowableArray<MoveOperation*>* stores = get_store_order(tmp_vmreg); | |
1629 for (int i = 0; i < stores->length(); i++) { | |
1630 arg_order.push(stores->at(i)->src_index()); | |
1631 arg_order.push(stores->at(i)->dst_index()); | |
1632 } | |
1633 } | |
1634 | |
1635 // Collected all the move operations | |
1636 void add_edge(int src_index, VMRegPair src, int dst_index, VMRegPair dst) { | |
1637 if (src.first() == dst.first()) return; | |
1638 edges.append(new MoveOperation(src_index, src, dst_index, dst)); | |
1639 } | |
1640 | |
1641 // Walk the edges breaking cycles between moves. The result list | |
1642 // can be walked in order to produce the proper set of loads | |
1643 GrowableArray<MoveOperation*>* get_store_order(VMRegPair temp_register) { | |
1644 // Record which moves kill which values | |
1645 GrowableArray<MoveOperation*> killer; | |
1646 for (int i = 0; i < edges.length(); i++) { | |
1647 MoveOperation* s = edges.at(i); | |
1648 assert(killer.at_grow(s->dst_id(), NULL) == NULL, "only one killer"); | |
1649 killer.at_put_grow(s->dst_id(), s, NULL); | |
1650 } | |
1651 assert(killer.at_grow(MoveOperation::get_id(temp_register), NULL) == NULL, | |
1652 "make sure temp isn't in the registers that are killed"); | |
1653 | |
1654 // create links between loads and stores | |
1655 for (int i = 0; i < edges.length(); i++) { | |
1656 edges.at(i)->link(killer); | |
1657 } | |
1658 | |
1659 // at this point, all the move operations are chained together | |
1660 // in a doubly linked list. Processing it backwards finds | |
1661 // the beginning of the chain, forwards finds the end. If there's | |
1662 // a cycle it can be broken at any point, so pick an edge and walk | |
1663 // backward until the list ends or we end where we started. | |
1664 GrowableArray<MoveOperation*>* stores = new GrowableArray<MoveOperation*>(); | |
1665 for (int e = 0; e < edges.length(); e++) { | |
1666 MoveOperation* s = edges.at(e); | |
1667 if (!s->is_processed()) { | |
1668 MoveOperation* start = s; | |
1669 // search for the beginning of the chain or cycle | |
1670 while (start->prev() != NULL && start->prev() != s) { | |
1671 start = start->prev(); | |
1672 } | |
1673 if (start->prev() == s) { | |
1674 start->break_cycle(temp_register); | |
1675 } | |
1676 // walk the chain forward inserting to store list | |
1677 while (start != NULL) { | |
1678 stores->append(start); | |
1679 start->set_processed(); | |
1680 start = start->next(); | |
1681 } | |
1682 } | |
1683 } | |
1684 return stores; | |
1685 } | |
1686 }; | |
1687 | |
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1688 static void verify_oop_args(MacroAssembler* masm, |
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1689 methodHandle method, |
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1690 const BasicType* sig_bt, |
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1691 const VMRegPair* regs) { |
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1692 Register temp_reg = rbx; // not part of any compiled calling seq |
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1693 if (VerifyOops) { |
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1694 for (int i = 0; i < method->size_of_parameters(); i++) { |
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1695 if (sig_bt[i] == T_OBJECT || |
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1696 sig_bt[i] == T_ARRAY) { |
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1697 VMReg r = regs[i].first(); |
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1698 assert(r->is_valid(), "bad oop arg"); |
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1699 if (r->is_stack()) { |
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1700 __ movptr(temp_reg, Address(rsp, r->reg2stack() * VMRegImpl::stack_slot_size + wordSize)); |
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1701 __ verify_oop(temp_reg); |
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1702 } else { |
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1703 __ verify_oop(r->as_Register()); |
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1704 } |
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1705 } |
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1706 } |
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1707 } |
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1708 } |
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1709 |
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1710 static void gen_special_dispatch(MacroAssembler* masm, |
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1711 methodHandle method, |
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1712 const BasicType* sig_bt, |
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1713 const VMRegPair* regs) { |
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1714 verify_oop_args(masm, method, sig_bt, regs); |
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1715 vmIntrinsics::ID iid = method->intrinsic_id(); |
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1716 |
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1717 // Now write the args into the outgoing interpreter space |
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1718 bool has_receiver = false; |
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1719 Register receiver_reg = noreg; |
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1720 int member_arg_pos = -1; |
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1721 Register member_reg = noreg; |
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1722 int ref_kind = MethodHandles::signature_polymorphic_intrinsic_ref_kind(iid); |
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1723 if (ref_kind != 0) { |
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1724 member_arg_pos = method->size_of_parameters() - 1; // trailing MemberName argument |
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1725 member_reg = rbx; // known to be free at this point |
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1726 has_receiver = MethodHandles::ref_kind_has_receiver(ref_kind); |
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1727 } else if (iid == vmIntrinsics::_invokeBasic) { |
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1728 has_receiver = true; |
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1729 } else { |
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1730 fatal(err_msg_res("unexpected intrinsic id %d", iid)); |
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1731 } |
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1732 |
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1733 if (member_reg != noreg) { |
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1734 // Load the member_arg into register, if necessary. |
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1735 SharedRuntime::check_member_name_argument_is_last_argument(method, sig_bt, regs); |
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1736 VMReg r = regs[member_arg_pos].first(); |
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1737 if (r->is_stack()) { |
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1738 __ movptr(member_reg, Address(rsp, r->reg2stack() * VMRegImpl::stack_slot_size + wordSize)); |
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1739 } else { |
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1740 // no data motion is needed |
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1741 member_reg = r->as_Register(); |
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1742 } |
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1743 } |
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1744 |
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1745 if (has_receiver) { |
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1746 // Make sure the receiver is loaded into a register. |
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1747 assert(method->size_of_parameters() > 0, "oob"); |
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1748 assert(sig_bt[0] == T_OBJECT, "receiver argument must be an object"); |
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1749 VMReg r = regs[0].first(); |
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1750 assert(r->is_valid(), "bad receiver arg"); |
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1751 if (r->is_stack()) { |
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1752 // Porting note: This assumes that compiled calling conventions always |
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1753 // pass the receiver oop in a register. If this is not true on some |
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1754 // platform, pick a temp and load the receiver from stack. |
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1755 fatal("receiver always in a register"); |
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1756 receiver_reg = j_rarg0; // known to be free at this point |
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1757 __ movptr(receiver_reg, Address(rsp, r->reg2stack() * VMRegImpl::stack_slot_size + wordSize)); |
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1758 } else { |
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1759 // no data motion is needed |
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1760 receiver_reg = r->as_Register(); |
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1761 } |
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1762 } |
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1763 |
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1764 // Figure out which address we are really jumping to: |
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1765 MethodHandles::generate_method_handle_dispatch(masm, iid, |
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1766 receiver_reg, member_reg, /*for_compiler_entry:*/ true); |
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1767 } |
5905 | 1768 |
0 | 1769 // --------------------------------------------------------------------------- |
1770 // Generate a native wrapper for a given method. The method takes arguments | |
1771 // in the Java compiled code convention, marshals them to the native | |
1772 // convention (handlizes oops, etc), transitions to native, makes the call, | |
1773 // returns to java state (possibly blocking), unhandlizes any result and | |
1774 // returns. | |
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1775 // |
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1776 // Critical native functions are a shorthand for the use of |
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1777 // GetPrimtiveArrayCritical and disallow the use of any other JNI |
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1778 // functions. The wrapper is expected to unpack the arguments before |
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1779 // passing them to the callee and perform checks before and after the |
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1780 // native call to ensure that they GC_locker |
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1781 // lock_critical/unlock_critical semantics are followed. Some other |
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1782 // parts of JNI setup are skipped like the tear down of the JNI handle |
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1783 // block and the check for pending exceptions it's impossible for them |
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1784 // to be thrown. |
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1785 // |
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1786 // They are roughly structured like this: |
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1787 // if (GC_locker::needs_gc()) |
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1788 // SharedRuntime::block_for_jni_critical(); |
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1789 // tranistion to thread_in_native |
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1790 // unpack arrray arguments and call native entry point |
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1791 // check for safepoint in progress |
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1792 // check if any thread suspend flags are set |
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1793 // call into JVM and possible unlock the JNI critical |
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1794 // if a GC was suppressed while in the critical native. |
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1795 // transition back to thread_in_Java |
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1796 // return to caller |
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1797 // |
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1798 nmethod* SharedRuntime::generate_native_wrapper(MacroAssembler* masm, |
0 | 1799 methodHandle method, |
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1800 int compile_id, |
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1801 BasicType* in_sig_bt, |
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1802 VMRegPair* in_regs, |
0 | 1803 BasicType ret_type) { |
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1804 if (method->is_method_handle_intrinsic()) { |
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1805 vmIntrinsics::ID iid = method->intrinsic_id(); |
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1806 intptr_t start = (intptr_t)__ pc(); |
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1807 int vep_offset = ((intptr_t)__ pc()) - start; |
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1808 gen_special_dispatch(masm, |
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1809 method, |
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1810 in_sig_bt, |
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1811 in_regs); |
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1812 int frame_complete = ((intptr_t)__ pc()) - start; // not complete, period |
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1813 __ flush(); |
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1814 int stack_slots = SharedRuntime::out_preserve_stack_slots(); // no out slots at all, actually |
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1815 return nmethod::new_native_nmethod(method, |
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1816 compile_id, |
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1817 masm->code(), |
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1818 vep_offset, |
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1819 frame_complete, |
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1820 stack_slots / VMRegImpl::slots_per_word, |
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1821 in_ByteSize(-1), |
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1822 in_ByteSize(-1), |
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1823 (OopMapSet*)NULL); |
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1824 } |
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1825 bool is_critical_native = true; |
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1826 address native_func = method->critical_native_function(); |
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1827 if (native_func == NULL) { |
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1828 native_func = method->native_function(); |
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1829 is_critical_native = false; |
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1830 } |
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1831 assert(native_func != NULL, "must have function"); |
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1832 |
0 | 1833 // An OopMap for lock (and class if static) |
1834 OopMapSet *oop_maps = new OopMapSet(); | |
1835 intptr_t start = (intptr_t)__ pc(); | |
1836 | |
1837 // We have received a description of where all the java arg are located | |
1838 // on entry to the wrapper. We need to convert these args to where | |
1839 // the jni function will expect them. To figure out where they go | |
1840 // we convert the java signature to a C signature by inserting | |
1841 // the hidden arguments as arg[0] and possibly arg[1] (static method) | |
1842 | |
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1843 const int total_in_args = method->size_of_parameters(); |
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1844 int total_c_args = total_in_args; |
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1845 if (!is_critical_native) { |
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1846 total_c_args += 1; |
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1847 if (method->is_static()) { |
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1848 total_c_args++; |
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1849 } |
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1850 } else { |
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1851 for (int i = 0; i < total_in_args; i++) { |
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1852 if (in_sig_bt[i] == T_ARRAY) { |
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1853 total_c_args++; |
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1854 } |
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1855 } |
0 | 1856 } |
1857 | |
1858 BasicType* out_sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_c_args); | |
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1859 VMRegPair* out_regs = NEW_RESOURCE_ARRAY(VMRegPair, total_c_args); |
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1860 BasicType* in_elem_bt = NULL; |
0 | 1861 |
1862 int argc = 0; | |
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1863 if (!is_critical_native) { |
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1864 out_sig_bt[argc++] = T_ADDRESS; |
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1865 if (method->is_static()) { |
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1866 out_sig_bt[argc++] = T_OBJECT; |
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1867 } |
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1868 |
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1869 for (int i = 0; i < total_in_args ; i++ ) { |
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1870 out_sig_bt[argc++] = in_sig_bt[i]; |
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1871 } |
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1872 } else { |
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1873 Thread* THREAD = Thread::current(); |
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1874 in_elem_bt = NEW_RESOURCE_ARRAY(BasicType, total_in_args); |
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1875 SignatureStream ss(method->signature()); |
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1876 for (int i = 0; i < total_in_args ; i++ ) { |
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1877 if (in_sig_bt[i] == T_ARRAY) { |
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1878 // Arrays are passed as int, elem* pair |
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1879 out_sig_bt[argc++] = T_INT; |
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1880 out_sig_bt[argc++] = T_ADDRESS; |
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1881 Symbol* atype = ss.as_symbol(CHECK_NULL); |
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1882 const char* at = atype->as_C_string(); |
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1883 if (strlen(at) == 2) { |
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1884 assert(at[0] == '[', "must be"); |
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1885 switch (at[1]) { |
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1886 case 'B': in_elem_bt[i] = T_BYTE; break; |
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1887 case 'C': in_elem_bt[i] = T_CHAR; break; |
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1888 case 'D': in_elem_bt[i] = T_DOUBLE; break; |
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1889 case 'F': in_elem_bt[i] = T_FLOAT; break; |
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1890 case 'I': in_elem_bt[i] = T_INT; break; |
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1891 case 'J': in_elem_bt[i] = T_LONG; break; |
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1892 case 'S': in_elem_bt[i] = T_SHORT; break; |
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1893 case 'Z': in_elem_bt[i] = T_BOOLEAN; break; |
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1894 default: ShouldNotReachHere(); |
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1895 } |
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1896 } |
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1897 } else { |
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1898 out_sig_bt[argc++] = in_sig_bt[i]; |
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1899 in_elem_bt[i] = T_VOID; |
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1900 } |
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1901 if (in_sig_bt[i] != T_VOID) { |
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1902 assert(in_sig_bt[i] == ss.type(), "must match"); |
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1903 ss.next(); |
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1904 } |
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1905 } |
0 | 1906 } |
1907 | |
1908 // Now figure out where the args must be stored and how much stack space | |
1909 // they require. | |
1910 int out_arg_slots; | |
14909 | 1911 out_arg_slots = c_calling_convention(out_sig_bt, out_regs, total_c_args); |
0 | 1912 |
1913 // Compute framesize for the wrapper. We need to handlize all oops in | |
1914 // incoming registers | |
1915 | |
1916 // Calculate the total number of stack slots we will need. | |
1917 | |
1918 // First count the abi requirement plus all of the outgoing args | |
1919 int stack_slots = SharedRuntime::out_preserve_stack_slots() + out_arg_slots; | |
1920 | |
1921 // Now the space for the inbound oop handle area | |
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1922 int total_save_slots = 6 * VMRegImpl::slots_per_word; // 6 arguments passed in registers |
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1923 if (is_critical_native) { |
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1924 // Critical natives may have to call out so they need a save area |
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1925 // for register arguments. |
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1926 int double_slots = 0; |
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1927 int single_slots = 0; |
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1928 for ( int i = 0; i < total_in_args; i++) { |
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1929 if (in_regs[i].first()->is_Register()) { |
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1930 const Register reg = in_regs[i].first()->as_Register(); |
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1931 switch (in_sig_bt[i]) { |
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1932 case T_BOOLEAN: |
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1933 case T_BYTE: |
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1934 case T_SHORT: |
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1935 case T_CHAR: |
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1936 case T_INT: single_slots++; break; |
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1937 case T_ARRAY: // specific to LP64 (7145024) |
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1938 case T_LONG: double_slots++; break; |
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1939 default: ShouldNotReachHere(); |
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1940 } |
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1941 } else if (in_regs[i].first()->is_XMMRegister()) { |
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1942 switch (in_sig_bt[i]) { |
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1943 case T_FLOAT: single_slots++; break; |
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1944 case T_DOUBLE: double_slots++; break; |
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1945 default: ShouldNotReachHere(); |
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1946 } |
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1947 } else if (in_regs[i].first()->is_FloatRegister()) { |
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1948 ShouldNotReachHere(); |
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1949 } |
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1950 } |
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1951 total_save_slots = double_slots * 2 + single_slots; |
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1952 // align the save area |
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1953 if (double_slots != 0) { |
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1954 stack_slots = round_to(stack_slots, 2); |
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1955 } |
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1956 } |
0 | 1957 |
1958 int oop_handle_offset = stack_slots; | |
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1959 stack_slots += total_save_slots; |
0 | 1960 |
1961 // Now any space we need for handlizing a klass if static method | |
1962 | |
1963 int klass_slot_offset = 0; | |
1964 int klass_offset = -1; | |
1965 int lock_slot_offset = 0; | |
1966 bool is_static = false; | |
1967 | |
1968 if (method->is_static()) { | |
1969 klass_slot_offset = stack_slots; | |
1970 stack_slots += VMRegImpl::slots_per_word; | |
1971 klass_offset = klass_slot_offset * VMRegImpl::stack_slot_size; | |
1972 is_static = true; | |
1973 } | |
1974 | |
1975 // Plus a lock if needed | |
1976 | |
1977 if (method->is_synchronized()) { | |
1978 lock_slot_offset = stack_slots; | |
1979 stack_slots += VMRegImpl::slots_per_word; | |
1980 } | |
1981 | |
1982 // Now a place (+2) to save return values or temp during shuffling | |
1983 // + 4 for return address (which we own) and saved rbp | |
1984 stack_slots += 6; | |
1985 | |
1986 // Ok The space we have allocated will look like: | |
1987 // | |
1988 // | |
1989 // FP-> | | | |
1990 // |---------------------| | |
1991 // | 2 slots for moves | | |
1992 // |---------------------| | |
1993 // | lock box (if sync) | | |
1994 // |---------------------| <- lock_slot_offset | |
1995 // | klass (if static) | | |
1996 // |---------------------| <- klass_slot_offset | |
1997 // | oopHandle area | | |
1998 // |---------------------| <- oop_handle_offset (6 java arg registers) | |
1999 // | outbound memory | | |
2000 // | based arguments | | |
2001 // | | | |
2002 // |---------------------| | |
2003 // | | | |
2004 // SP-> | out_preserved_slots | | |
2005 // | |
2006 // | |
2007 | |
2008 | |
2009 // Now compute actual number of stack words we need rounding to make | |
2010 // stack properly aligned. | |
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2011 stack_slots = round_to(stack_slots, StackAlignmentInSlots); |
0 | 2012 |
2013 int stack_size = stack_slots * VMRegImpl::stack_slot_size; | |
2014 | |
2015 // First thing make an ic check to see if we should even be here | |
2016 | |
2017 // We are free to use all registers as temps without saving them and | |
2018 // restoring them except rbp. rbp is the only callee save register | |
2019 // as far as the interpreter and the compiler(s) are concerned. | |
2020 | |
2021 | |
2022 const Register ic_reg = rax; | |
2023 const Register receiver = j_rarg0; | |
2024 | |
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2025 Label hit; |
0 | 2026 Label exception_pending; |
2027 | |
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2028 assert_different_registers(ic_reg, receiver, rscratch1); |
0 | 2029 __ verify_oop(receiver); |
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2030 __ load_klass(rscratch1, receiver); |
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2031 __ cmpq(ic_reg, rscratch1); |
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2032 __ jcc(Assembler::equal, hit); |
0 | 2033 |
2034 __ jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub())); | |
2035 | |
2036 // Verified entry point must be aligned | |
2037 __ align(8); | |
2038 | |
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2039 __ bind(hit); |
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2040 |
0 | 2041 int vep_offset = ((intptr_t)__ pc()) - start; |
2042 | |
2043 // The instruction at the verified entry point must be 5 bytes or longer | |
2044 // because it can be patched on the fly by make_non_entrant. The stack bang | |
2045 // instruction fits that requirement. | |
2046 | |
2047 // Generate stack overflow check | |
2048 | |
2049 if (UseStackBanging) { | |
2050 __ bang_stack_with_offset(StackShadowPages*os::vm_page_size()); | |
2051 } else { | |
2052 // need a 5 byte instruction to allow MT safe patching to non-entrant | |
2053 __ fat_nop(); | |
2054 } | |
2055 | |
2056 // Generate a new frame for the wrapper. | |
2057 __ enter(); | |
2058 // -2 because return address is already present and so is saved rbp | |
304 | 2059 __ subptr(rsp, stack_size - 2*wordSize); |
0 | 2060 |
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2061 // Frame is now completed as far as size and linkage. |
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2062 int frame_complete = ((intptr_t)__ pc()) - start; |
0 | 2063 |
2064 #ifdef ASSERT | |
2065 { | |
2066 Label L; | |
304 | 2067 __ mov(rax, rsp); |
605 | 2068 __ andptr(rax, -16); // must be 16 byte boundary (see amd64 ABI) |
304 | 2069 __ cmpptr(rax, rsp); |
0 | 2070 __ jcc(Assembler::equal, L); |
2071 __ stop("improperly aligned stack"); | |
2072 __ bind(L); | |
2073 } | |
2074 #endif /* ASSERT */ | |
2075 | |
2076 | |
2077 // We use r14 as the oop handle for the receiver/klass | |
2078 // It is callee save so it survives the call to native | |
2079 | |
2080 const Register oop_handle_reg = r14; | |
2081 | |
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2082 if (is_critical_native) { |
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2083 check_needs_gc_for_critical_native(masm, stack_slots, total_c_args, total_in_args, |
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2084 oop_handle_offset, oop_maps, in_regs, in_sig_bt); |
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2085 } |
0 | 2086 |
2087 // | |
2088 // We immediately shuffle the arguments so that any vm call we have to | |
2089 // make from here on out (sync slow path, jvmti, etc.) we will have | |
2090 // captured the oops from our caller and have a valid oopMap for | |
2091 // them. | |
2092 | |
2093 // ----------------- | |
2094 // The Grand Shuffle | |
2095 | |
2096 // The Java calling convention is either equal (linux) or denser (win64) than the | |
2097 // c calling convention. However the because of the jni_env argument the c calling | |
2098 // convention always has at least one more (and two for static) arguments than Java. | |
2099 // Therefore if we move the args from java -> c backwards then we will never have | |
2100 // a register->register conflict and we don't have to build a dependency graph | |
2101 // and figure out how to break any cycles. | |
2102 // | |
2103 | |
2104 // Record esp-based slot for receiver on stack for non-static methods | |
2105 int receiver_offset = -1; | |
2106 | |
2107 // This is a trick. We double the stack slots so we can claim | |
2108 // the oops in the caller's frame. Since we are sure to have | |
2109 // more args than the caller doubling is enough to make | |
2110 // sure we can capture all the incoming oop args from the | |
2111 // caller. | |
2112 // | |
2113 OopMap* map = new OopMap(stack_slots * 2, 0 /* arg_slots*/); | |
2114 | |
2115 // Mark location of rbp (someday) | |
2116 // map->set_callee_saved(VMRegImpl::stack2reg( stack_slots - 2), stack_slots * 2, 0, vmreg(rbp)); | |
2117 | |
2118 // Use eax, ebx as temporaries during any memory-memory moves we have to do | |
2119 // All inbound args are referenced based on rbp and all outbound args via rsp. | |
2120 | |
2121 | |
2122 #ifdef ASSERT | |
2123 bool reg_destroyed[RegisterImpl::number_of_registers]; | |
2124 bool freg_destroyed[XMMRegisterImpl::number_of_registers]; | |
2125 for ( int r = 0 ; r < RegisterImpl::number_of_registers ; r++ ) { | |
2126 reg_destroyed[r] = false; | |
2127 } | |
2128 for ( int f = 0 ; f < XMMRegisterImpl::number_of_registers ; f++ ) { | |
2129 freg_destroyed[f] = false; | |
2130 } | |
2131 | |
2132 #endif /* ASSERT */ | |
2133 | |
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2134 // This may iterate in two different directions depending on the |
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2135 // kind of native it is. The reason is that for regular JNI natives |
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2136 // the incoming and outgoing registers are offset upwards and for |
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2137 // critical natives they are offset down. |
5905 | 2138 GrowableArray<int> arg_order(2 * total_in_args); |
2139 VMRegPair tmp_vmreg; | |
2140 tmp_vmreg.set1(rbx->as_VMReg()); | |
2141 | |
2142 if (!is_critical_native) { | |
2143 for (int i = total_in_args - 1, c_arg = total_c_args - 1; i >= 0; i--, c_arg--) { | |
2144 arg_order.push(i); | |
2145 arg_order.push(c_arg); | |
2146 } | |
2147 } else { | |
2148 // Compute a valid move order, using tmp_vmreg to break any cycles | |
2149 ComputeMoveOrder cmo(total_in_args, in_regs, total_c_args, out_regs, in_sig_bt, arg_order, tmp_vmreg); | |
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2150 } |
5905 | 2151 |
2152 int temploc = -1; | |
2153 for (int ai = 0; ai < arg_order.length(); ai += 2) { | |
2154 int i = arg_order.at(ai); | |
2155 int c_arg = arg_order.at(ai + 1); | |
2156 __ block_comment(err_msg("move %d -> %d", i, c_arg)); | |
2157 if (c_arg == -1) { | |
2158 assert(is_critical_native, "should only be required for critical natives"); | |
2159 // This arg needs to be moved to a temporary | |
2160 __ mov(tmp_vmreg.first()->as_Register(), in_regs[i].first()->as_Register()); | |
2161 in_regs[i] = tmp_vmreg; | |
2162 temploc = i; | |
2163 continue; | |
2164 } else if (i == -1) { | |
2165 assert(is_critical_native, "should only be required for critical natives"); | |
2166 // Read from the temporary location | |
2167 assert(temploc != -1, "must be valid"); | |
2168 i = temploc; | |
2169 temploc = -1; | |
2170 } | |
0 | 2171 #ifdef ASSERT |
2172 if (in_regs[i].first()->is_Register()) { | |
2173 assert(!reg_destroyed[in_regs[i].first()->as_Register()->encoding()], "destroyed reg!"); | |
2174 } else if (in_regs[i].first()->is_XMMRegister()) { | |
2175 assert(!freg_destroyed[in_regs[i].first()->as_XMMRegister()->encoding()], "destroyed reg!"); | |
2176 } | |
2177 if (out_regs[c_arg].first()->is_Register()) { | |
2178 reg_destroyed[out_regs[c_arg].first()->as_Register()->encoding()] = true; | |
2179 } else if (out_regs[c_arg].first()->is_XMMRegister()) { | |
2180 freg_destroyed[out_regs[c_arg].first()->as_XMMRegister()->encoding()] = true; | |
2181 } | |
2182 #endif /* ASSERT */ | |
2183 switch (in_sig_bt[i]) { | |
2184 case T_ARRAY: | |
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2185 if (is_critical_native) { |
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2186 unpack_array_argument(masm, in_regs[i], in_elem_bt[i], out_regs[c_arg + 1], out_regs[c_arg]); |
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2187 c_arg++; |
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2188 #ifdef ASSERT |
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2189 if (out_regs[c_arg].first()->is_Register()) { |
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2190 reg_destroyed[out_regs[c_arg].first()->as_Register()->encoding()] = true; |
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2191 } else if (out_regs[c_arg].first()->is_XMMRegister()) { |
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2192 freg_destroyed[out_regs[c_arg].first()->as_XMMRegister()->encoding()] = true; |
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2193 } |
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2194 #endif |
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2195 break; |
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2196 } |
0 | 2197 case T_OBJECT: |
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2198 assert(!is_critical_native, "no oop arguments"); |
0 | 2199 object_move(masm, map, oop_handle_offset, stack_slots, in_regs[i], out_regs[c_arg], |
2200 ((i == 0) && (!is_static)), | |
2201 &receiver_offset); | |
2202 break; | |
2203 case T_VOID: | |
2204 break; | |
2205 | |
2206 case T_FLOAT: | |
2207 float_move(masm, in_regs[i], out_regs[c_arg]); | |
2208 break; | |
2209 | |
2210 case T_DOUBLE: | |
2211 assert( i + 1 < total_in_args && | |
2212 in_sig_bt[i + 1] == T_VOID && | |
2213 out_sig_bt[c_arg+1] == T_VOID, "bad arg list"); | |
2214 double_move(masm, in_regs[i], out_regs[c_arg]); | |
2215 break; | |
2216 | |
2217 case T_LONG : | |
2218 long_move(masm, in_regs[i], out_regs[c_arg]); | |
2219 break; | |
2220 | |
2221 case T_ADDRESS: assert(false, "found T_ADDRESS in java args"); | |
2222 | |
2223 default: | |
2224 move32_64(masm, in_regs[i], out_regs[c_arg]); | |
2225 } | |
2226 } | |
2227 | |
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2228 int c_arg; |
0 | 2229 |
2230 // Pre-load a static method's oop into r14. Used both by locking code and | |
2231 // the normal JNI call code. | |
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2232 if (!is_critical_native) { |
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2233 // point c_arg at the first arg that is already loaded in case we |
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2234 // need to spill before we call out |
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2235 c_arg = total_c_args - total_in_args; |
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2236 |
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2237 if (method->is_static()) { |
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2238 |
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2239 // load oop into a register |
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2240 __ movoop(oop_handle_reg, JNIHandles::make_local(method->method_holder()->java_mirror())); |
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2241 |
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2242 // Now handlize the static class mirror it's known not-null. |
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2243 __ movptr(Address(rsp, klass_offset), oop_handle_reg); |
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2244 map->set_oop(VMRegImpl::stack2reg(klass_slot_offset)); |
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2245 |
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2246 // Now get the handle |
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2247 __ lea(oop_handle_reg, Address(rsp, klass_offset)); |
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2248 // store the klass handle as second argument |
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2249 __ movptr(c_rarg1, oop_handle_reg); |
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2250 // and protect the arg if we must spill |
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2251 c_arg--; |
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2252 } |
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2253 } else { |
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2254 // For JNI critical methods we need to save all registers in save_args. |
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2255 c_arg = 0; |
0 | 2256 } |
2257 | |
2258 // Change state to native (we save the return address in the thread, since it might not | |
2259 // be pushed on the stack when we do a a stack traversal). It is enough that the pc() | |
2260 // points into the right code segment. It does not have to be the correct return pc. | |
2261 // We use the same pc/oopMap repeatedly when we call out | |
2262 | |
2263 intptr_t the_pc = (intptr_t) __ pc(); | |
2264 oop_maps->add_gc_map(the_pc - start, map); | |
2265 | |
2266 __ set_last_Java_frame(rsp, noreg, (address)the_pc); | |
2267 | |
2268 | |
2269 // We have all of the arguments setup at this point. We must not touch any register | |
2270 // argument registers at this point (what if we save/restore them there are no oop? | |
2271 | |
2272 { | |
2273 SkipIfEqual skip(masm, &DTraceMethodProbes, false); | |
2274 // protect the args we've loaded | |
2275 save_args(masm, total_c_args, c_arg, out_regs); | |
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2276 __ mov_metadata(c_rarg1, method()); |
0 | 2277 __ call_VM_leaf( |
2278 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), | |
2279 r15_thread, c_rarg1); | |
2280 restore_args(masm, total_c_args, c_arg, out_regs); | |
2281 } | |
2282 | |
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2283 // RedefineClasses() tracing support for obsolete method entry |
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2284 if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) { |
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2285 // protect the args we've loaded |
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2286 save_args(masm, total_c_args, c_arg, out_regs); |
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2287 __ mov_metadata(c_rarg1, method()); |
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2288 __ call_VM_leaf( |
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2289 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry), |
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2290 r15_thread, c_rarg1); |
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2291 restore_args(masm, total_c_args, c_arg, out_regs); |
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2292 } |
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2293 |
0 | 2294 // Lock a synchronized method |
2295 | |
2296 // Register definitions used by locking and unlocking | |
2297 | |
2298 const Register swap_reg = rax; // Must use rax for cmpxchg instruction | |
2299 const Register obj_reg = rbx; // Will contain the oop | |
2300 const Register lock_reg = r13; // Address of compiler lock object (BasicLock) | |
2301 const Register old_hdr = r13; // value of old header at unlock time | |
2302 | |
2303 Label slow_path_lock; | |
2304 Label lock_done; | |
2305 | |
2306 if (method->is_synchronized()) { | |
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2307 assert(!is_critical_native, "unhandled"); |
0 | 2308 |
2309 | |
2310 const int mark_word_offset = BasicLock::displaced_header_offset_in_bytes(); | |
2311 | |
2312 // Get the handle (the 2nd argument) | |
304 | 2313 __ mov(oop_handle_reg, c_rarg1); |
0 | 2314 |
2315 // Get address of the box | |
2316 | |
304 | 2317 __ lea(lock_reg, Address(rsp, lock_slot_offset * VMRegImpl::stack_slot_size)); |
0 | 2318 |
2319 // Load the oop from the handle | |
304 | 2320 __ movptr(obj_reg, Address(oop_handle_reg, 0)); |
0 | 2321 |
2322 if (UseBiasedLocking) { | |
2323 __ biased_locking_enter(lock_reg, obj_reg, swap_reg, rscratch1, false, lock_done, &slow_path_lock); | |
2324 } | |
2325 | |
2326 // Load immediate 1 into swap_reg %rax | |
2327 __ movl(swap_reg, 1); | |
2328 | |
2329 // Load (object->mark() | 1) into swap_reg %rax | |
304 | 2330 __ orptr(swap_reg, Address(obj_reg, 0)); |
0 | 2331 |
2332 // Save (object->mark() | 1) into BasicLock's displaced header | |
304 | 2333 __ movptr(Address(lock_reg, mark_word_offset), swap_reg); |
0 | 2334 |
2335 if (os::is_MP()) { | |
2336 __ lock(); | |
2337 } | |
2338 | |
2339 // src -> dest iff dest == rax else rax <- dest | |
304 | 2340 __ cmpxchgptr(lock_reg, Address(obj_reg, 0)); |
0 | 2341 __ jcc(Assembler::equal, lock_done); |
2342 | |
2343 // Hmm should this move to the slow path code area??? | |
2344 | |
2345 // Test if the oopMark is an obvious stack pointer, i.e., | |
2346 // 1) (mark & 3) == 0, and | |
2347 // 2) rsp <= mark < mark + os::pagesize() | |
2348 // These 3 tests can be done by evaluating the following | |
2349 // expression: ((mark - rsp) & (3 - os::vm_page_size())), | |
2350 // assuming both stack pointer and pagesize have their | |
2351 // least significant 2 bits clear. | |
2352 // NOTE: the oopMark is in swap_reg %rax as the result of cmpxchg | |
2353 | |
304 | 2354 __ subptr(swap_reg, rsp); |
2355 __ andptr(swap_reg, 3 - os::vm_page_size()); | |
0 | 2356 |
2357 // Save the test result, for recursive case, the result is zero | |
304 | 2358 __ movptr(Address(lock_reg, mark_word_offset), swap_reg); |
0 | 2359 __ jcc(Assembler::notEqual, slow_path_lock); |
2360 | |
2361 // Slow path will re-enter here | |
2362 | |
2363 __ bind(lock_done); | |
2364 } | |
2365 | |
2366 | |
2367 // Finally just about ready to make the JNI call | |
2368 | |
2369 | |
2370 // get JNIEnv* which is first argument to native | |
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2371 if (!is_critical_native) { |
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2372 __ lea(c_rarg0, Address(r15_thread, in_bytes(JavaThread::jni_environment_offset()))); |
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2373 } |
0 | 2374 |
2375 // Now set thread in native | |
304 | 2376 __ movl(Address(r15_thread, JavaThread::thread_state_offset()), _thread_in_native); |
0 | 2377 |
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2378 __ call(RuntimeAddress(native_func)); |
0 | 2379 |
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2380 // Verify or restore cpu control state after JNI call |
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2381 __ restore_cpu_control_state_after_jni(); |
0 | 2382 |
2383 // Unpack native results. | |
2384 switch (ret_type) { | |
2385 case T_BOOLEAN: __ c2bool(rax); break; | |
2386 case T_CHAR : __ movzwl(rax, rax); break; | |
2387 case T_BYTE : __ sign_extend_byte (rax); break; | |
2388 case T_SHORT : __ sign_extend_short(rax); break; | |
2389 case T_INT : /* nothing to do */ break; | |
2390 case T_DOUBLE : | |
2391 case T_FLOAT : | |
2392 // Result is in xmm0 we'll save as needed | |
2393 break; | |
2394 case T_ARRAY: // Really a handle | |
2395 case T_OBJECT: // Really a handle | |
2396 break; // can't de-handlize until after safepoint check | |
2397 case T_VOID: break; | |
2398 case T_LONG: break; | |
2399 default : ShouldNotReachHere(); | |
2400 } | |
2401 | |
2402 // Switch thread to "native transition" state before reading the synchronization state. | |
2403 // This additional state is necessary because reading and testing the synchronization | |
2404 // state is not atomic w.r.t. GC, as this scenario demonstrates: | |
2405 // Java thread A, in _thread_in_native state, loads _not_synchronized and is preempted. | |
2406 // VM thread changes sync state to synchronizing and suspends threads for GC. | |
2407 // Thread A is resumed to finish this native method, but doesn't block here since it | |
2408 // didn't see any synchronization is progress, and escapes. | |
304 | 2409 __ movl(Address(r15_thread, JavaThread::thread_state_offset()), _thread_in_native_trans); |
0 | 2410 |
2411 if(os::is_MP()) { | |
2412 if (UseMembar) { | |
2413 // Force this write out before the read below | |
2414 __ membar(Assembler::Membar_mask_bits( | |
2415 Assembler::LoadLoad | Assembler::LoadStore | | |
2416 Assembler::StoreLoad | Assembler::StoreStore)); | |
2417 } else { | |
2418 // Write serialization page so VM thread can do a pseudo remote membar. | |
2419 // We use the current thread pointer to calculate a thread specific | |
2420 // offset to write to within the page. This minimizes bus traffic | |
2421 // due to cache line collision. | |
2422 __ serialize_memory(r15_thread, rcx); | |
2423 } | |
2424 } | |
2425 | |
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2426 Label after_transition; |
0 | 2427 |
2428 // check for safepoint operation in progress and/or pending suspend requests | |
2429 { | |
2430 Label Continue; | |
2431 | |
2432 __ cmp32(ExternalAddress((address)SafepointSynchronize::address_of_state()), | |
2433 SafepointSynchronize::_not_synchronized); | |
2434 | |
2435 Label L; | |
2436 __ jcc(Assembler::notEqual, L); | |
2437 __ cmpl(Address(r15_thread, JavaThread::suspend_flags_offset()), 0); | |
2438 __ jcc(Assembler::equal, Continue); | |
2439 __ bind(L); | |
2440 | |
2441 // Don't use call_VM as it will see a possible pending exception and forward it | |
2442 // and never return here preventing us from clearing _last_native_pc down below. | |
2443 // Also can't use call_VM_leaf either as it will check to see if rsi & rdi are | |
2444 // preserved and correspond to the bcp/locals pointers. So we do a runtime call | |
2445 // by hand. | |
2446 // | |
2447 save_native_result(masm, ret_type, stack_slots); | |
304 | 2448 __ mov(c_rarg0, r15_thread); |
2449 __ mov(r12, rsp); // remember sp | |
2450 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows | |
2451 __ andptr(rsp, -16); // align stack as required by ABI | |
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2452 if (!is_critical_native) { |
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2453 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans))); |
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2454 } else { |
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2455 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans_and_transition))); |
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2456 } |
304 | 2457 __ mov(rsp, r12); // restore sp |
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2458 __ reinit_heapbase(); |
0 | 2459 // Restore any method result value |
2460 restore_native_result(masm, ret_type, stack_slots); | |
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2461 |
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2462 if (is_critical_native) { |
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2463 // The call above performed the transition to thread_in_Java so |
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2464 // skip the transition logic below. |
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2465 __ jmpb(after_transition); |
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2466 } |
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2467 |
0 | 2468 __ bind(Continue); |
2469 } | |
2470 | |
2471 // change thread state | |
2472 __ movl(Address(r15_thread, JavaThread::thread_state_offset()), _thread_in_Java); | |
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2473 __ bind(after_transition); |
0 | 2474 |
2475 Label reguard; | |
2476 Label reguard_done; | |
2477 __ cmpl(Address(r15_thread, JavaThread::stack_guard_state_offset()), JavaThread::stack_guard_yellow_disabled); | |
2478 __ jcc(Assembler::equal, reguard); | |
2479 __ bind(reguard_done); | |
2480 | |
2481 // native result if any is live | |
2482 | |
2483 // Unlock | |
2484 Label unlock_done; | |
2485 Label slow_path_unlock; | |
2486 if (method->is_synchronized()) { | |
2487 | |
2488 // Get locked oop from the handle we passed to jni | |
304 | 2489 __ movptr(obj_reg, Address(oop_handle_reg, 0)); |
0 | 2490 |
2491 Label done; | |
2492 | |
2493 if (UseBiasedLocking) { | |
2494 __ biased_locking_exit(obj_reg, old_hdr, done); | |
2495 } | |
2496 | |
2497 // Simple recursive lock? | |
2498 | |
304 | 2499 __ cmpptr(Address(rsp, lock_slot_offset * VMRegImpl::stack_slot_size), (int32_t)NULL_WORD); |
0 | 2500 __ jcc(Assembler::equal, done); |
2501 | |
2502 // Must save rax if if it is live now because cmpxchg must use it | |
2503 if (ret_type != T_FLOAT && ret_type != T_DOUBLE && ret_type != T_VOID) { | |
2504 save_native_result(masm, ret_type, stack_slots); | |
2505 } | |
2506 | |
2507 | |
2508 // get address of the stack lock | |
304 | 2509 __ lea(rax, Address(rsp, lock_slot_offset * VMRegImpl::stack_slot_size)); |
0 | 2510 // get old displaced header |
304 | 2511 __ movptr(old_hdr, Address(rax, 0)); |
0 | 2512 |
2513 // Atomic swap old header if oop still contains the stack lock | |
2514 if (os::is_MP()) { | |
2515 __ lock(); | |
2516 } | |
304 | 2517 __ cmpxchgptr(old_hdr, Address(obj_reg, 0)); |
0 | 2518 __ jcc(Assembler::notEqual, slow_path_unlock); |
2519 | |
2520 // slow path re-enters here | |
2521 __ bind(unlock_done); | |
2522 if (ret_type != T_FLOAT && ret_type != T_DOUBLE && ret_type != T_VOID) { | |
2523 restore_native_result(masm, ret_type, stack_slots); | |
2524 } | |
2525 | |
2526 __ bind(done); | |
2527 | |
2528 } | |
2529 { | |
2530 SkipIfEqual skip(masm, &DTraceMethodProbes, false); | |
2531 save_native_result(masm, ret_type, stack_slots); | |
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2532 __ mov_metadata(c_rarg1, method()); |
0 | 2533 __ call_VM_leaf( |
2534 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), | |
2535 r15_thread, c_rarg1); | |
2536 restore_native_result(masm, ret_type, stack_slots); | |
2537 } | |
2538 | |
2539 __ reset_last_Java_frame(false, true); | |
2540 | |
2541 // Unpack oop result | |
2542 if (ret_type == T_OBJECT || ret_type == T_ARRAY) { | |
2543 Label L; | |
304 | 2544 __ testptr(rax, rax); |
0 | 2545 __ jcc(Assembler::zero, L); |
304 | 2546 __ movptr(rax, Address(rax, 0)); |
0 | 2547 __ bind(L); |
2548 __ verify_oop(rax); | |
2549 } | |
2550 | |
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2551 if (!is_critical_native) { |
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2552 // reset handle block |
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2553 __ movptr(rcx, Address(r15_thread, JavaThread::active_handles_offset())); |
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2554 __ movptr(Address(rcx, JNIHandleBlock::top_offset_in_bytes()), (int32_t)NULL_WORD); |
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2555 } |
0 | 2556 |
2557 // pop our frame | |
2558 | |
2559 __ leave(); | |
2560 | |
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2561 if (!is_critical_native) { |
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2562 // Any exception pending? |
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2563 __ cmpptr(Address(r15_thread, in_bytes(Thread::pending_exception_offset())), (int32_t)NULL_WORD); |
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2564 __ jcc(Assembler::notEqual, exception_pending); |
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2565 } |
0 | 2566 |
2567 // Return | |
2568 | |
2569 __ ret(0); | |
2570 | |
2571 // Unexpected paths are out of line and go here | |
2572 | |
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2573 if (!is_critical_native) { |
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2574 // forward the exception |
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2575 __ bind(exception_pending); |
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2576 |
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2577 // and forward the exception |
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2578 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry())); |
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2579 } |
0 | 2580 |
2581 // Slow path locking & unlocking | |
2582 if (method->is_synchronized()) { | |
2583 | |
2584 // BEGIN Slow path lock | |
2585 __ bind(slow_path_lock); | |
2586 | |
2587 // has last_Java_frame setup. No exceptions so do vanilla call not call_VM | |
2588 // args are (oop obj, BasicLock* lock, JavaThread* thread) | |
2589 | |
2590 // protect the args we've loaded | |
2591 save_args(masm, total_c_args, c_arg, out_regs); | |
2592 | |
304 | 2593 __ mov(c_rarg0, obj_reg); |
2594 __ mov(c_rarg1, lock_reg); | |
2595 __ mov(c_rarg2, r15_thread); | |
0 | 2596 |
2597 // Not a leaf but we have last_Java_frame setup as we want | |
2598 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::complete_monitor_locking_C), 3); | |
2599 restore_args(masm, total_c_args, c_arg, out_regs); | |
2600 | |
2601 #ifdef ASSERT | |
2602 { Label L; | |
304 | 2603 __ cmpptr(Address(r15_thread, in_bytes(Thread::pending_exception_offset())), (int32_t)NULL_WORD); |
0 | 2604 __ jcc(Assembler::equal, L); |
2605 __ stop("no pending exception allowed on exit from monitorenter"); | |
2606 __ bind(L); | |
2607 } | |
2608 #endif | |
2609 __ jmp(lock_done); | |
2610 | |
2611 // END Slow path lock | |
2612 | |
2613 // BEGIN Slow path unlock | |
2614 __ bind(slow_path_unlock); | |
2615 | |
2616 // If we haven't already saved the native result we must save it now as xmm registers | |
2617 // are still exposed. | |
2618 | |
2619 if (ret_type == T_FLOAT || ret_type == T_DOUBLE ) { | |
2620 save_native_result(masm, ret_type, stack_slots); | |
2621 } | |
2622 | |
304 | 2623 __ lea(c_rarg1, Address(rsp, lock_slot_offset * VMRegImpl::stack_slot_size)); |
2624 | |
2625 __ mov(c_rarg0, obj_reg); | |
2626 __ mov(r12, rsp); // remember sp | |
2627 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows | |
2628 __ andptr(rsp, -16); // align stack as required by ABI | |
0 | 2629 |
2630 // Save pending exception around call to VM (which contains an EXCEPTION_MARK) | |
2631 // NOTE that obj_reg == rbx currently | |
304 | 2632 __ movptr(rbx, Address(r15_thread, in_bytes(Thread::pending_exception_offset()))); |
2633 __ movptr(Address(r15_thread, in_bytes(Thread::pending_exception_offset())), (int32_t)NULL_WORD); | |
0 | 2634 |
2635 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::complete_monitor_unlocking_C))); | |
304 | 2636 __ mov(rsp, r12); // restore sp |
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2637 __ reinit_heapbase(); |
0 | 2638 #ifdef ASSERT |
2639 { | |
2640 Label L; | |
304 | 2641 __ cmpptr(Address(r15_thread, in_bytes(Thread::pending_exception_offset())), (int)NULL_WORD); |
0 | 2642 __ jcc(Assembler::equal, L); |
2643 __ stop("no pending exception allowed on exit complete_monitor_unlocking_C"); | |
2644 __ bind(L); | |
2645 } | |
2646 #endif /* ASSERT */ | |
2647 | |
304 | 2648 __ movptr(Address(r15_thread, in_bytes(Thread::pending_exception_offset())), rbx); |
0 | 2649 |
2650 if (ret_type == T_FLOAT || ret_type == T_DOUBLE ) { | |
2651 restore_native_result(masm, ret_type, stack_slots); | |
2652 } | |
2653 __ jmp(unlock_done); | |
2654 | |
2655 // END Slow path unlock | |
2656 | |
2657 } // synchronized | |
2658 | |
2659 // SLOW PATH Reguard the stack if needed | |
2660 | |
2661 __ bind(reguard); | |
2662 save_native_result(masm, ret_type, stack_slots); | |
304 | 2663 __ mov(r12, rsp); // remember sp |
2664 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows | |
2665 __ andptr(rsp, -16); // align stack as required by ABI | |
0 | 2666 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages))); |
304 | 2667 __ mov(rsp, r12); // restore sp |
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2668 __ reinit_heapbase(); |
0 | 2669 restore_native_result(masm, ret_type, stack_slots); |
2670 // and continue | |
2671 __ jmp(reguard_done); | |
2672 | |
2673 | |
2674 | |
2675 __ flush(); | |
2676 | |
2677 nmethod *nm = nmethod::new_native_nmethod(method, | |
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2678 compile_id, |
0 | 2679 masm->code(), |
2680 vep_offset, | |
2681 frame_complete, | |
2682 stack_slots / VMRegImpl::slots_per_word, | |
2683 (is_static ? in_ByteSize(klass_offset) : in_ByteSize(receiver_offset)), | |
2684 in_ByteSize(lock_slot_offset*VMRegImpl::stack_slot_size), | |
2685 oop_maps); | |
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2686 |
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2687 if (is_critical_native) { |
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2688 nm->set_lazy_critical_native(true); |
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2689 } |
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2690 |
0 | 2691 return nm; |
2692 | |
2693 } | |
2694 | |
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2695 #ifdef HAVE_DTRACE_H |
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2696 // --------------------------------------------------------------------------- |
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2697 // Generate a dtrace nmethod for a given signature. The method takes arguments |
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2698 // in the Java compiled code convention, marshals them to the native |
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2699 // abi and then leaves nops at the position you would expect to call a native |
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2700 // function. When the probe is enabled the nops are replaced with a trap |
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2701 // instruction that dtrace inserts and the trace will cause a notification |
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2702 // to dtrace. |
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2703 // |
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2704 // The probes are only able to take primitive types and java/lang/String as |
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2705 // arguments. No other java types are allowed. Strings are converted to utf8 |
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2706 // strings so that from dtrace point of view java strings are converted to C |
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2707 // strings. There is an arbitrary fixed limit on the total space that a method |
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2708 // can use for converting the strings. (256 chars per string in the signature). |
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2709 // So any java string larger then this is truncated. |
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2710 |
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2711 static int fp_offset[ConcreteRegisterImpl::number_of_registers] = { 0 }; |
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2712 static bool offsets_initialized = false; |
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2713 |
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2714 |
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2715 nmethod *SharedRuntime::generate_dtrace_nmethod(MacroAssembler *masm, |
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2716 methodHandle method) { |
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2717 |
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2718 |
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2719 // generate_dtrace_nmethod is guarded by a mutex so we are sure to |
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2720 // be single threaded in this method. |
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2721 assert(AdapterHandlerLibrary_lock->owned_by_self(), "must be"); |
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2722 |
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2723 if (!offsets_initialized) { |
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2724 fp_offset[c_rarg0->as_VMReg()->value()] = -1 * wordSize; |
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2725 fp_offset[c_rarg1->as_VMReg()->value()] = -2 * wordSize; |
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2726 fp_offset[c_rarg2->as_VMReg()->value()] = -3 * wordSize; |
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2727 fp_offset[c_rarg3->as_VMReg()->value()] = -4 * wordSize; |
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2728 fp_offset[c_rarg4->as_VMReg()->value()] = -5 * wordSize; |
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2729 fp_offset[c_rarg5->as_VMReg()->value()] = -6 * wordSize; |
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2730 |
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2731 fp_offset[c_farg0->as_VMReg()->value()] = -7 * wordSize; |
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2732 fp_offset[c_farg1->as_VMReg()->value()] = -8 * wordSize; |
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2733 fp_offset[c_farg2->as_VMReg()->value()] = -9 * wordSize; |
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2734 fp_offset[c_farg3->as_VMReg()->value()] = -10 * wordSize; |
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2735 fp_offset[c_farg4->as_VMReg()->value()] = -11 * wordSize; |
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2736 fp_offset[c_farg5->as_VMReg()->value()] = -12 * wordSize; |
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2737 fp_offset[c_farg6->as_VMReg()->value()] = -13 * wordSize; |
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2738 fp_offset[c_farg7->as_VMReg()->value()] = -14 * wordSize; |
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2739 |
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2740 offsets_initialized = true; |
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2741 } |
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2742 // Fill in the signature array, for the calling-convention call. |
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2743 int total_args_passed = method->size_of_parameters(); |
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2744 |
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2745 BasicType* in_sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_args_passed); |
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2746 VMRegPair *in_regs = NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed); |
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2747 |
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2748 // The signature we are going to use for the trap that dtrace will see |
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2749 // java/lang/String is converted. We drop "this" and any other object |
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2750 // is converted to NULL. (A one-slot java/lang/Long object reference |
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2751 // is converted to a two-slot long, which is why we double the allocation). |
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2752 BasicType* out_sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_args_passed * 2); |
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2753 VMRegPair* out_regs = NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed * 2); |
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2754 |
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2755 int i=0; |
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2756 int total_strings = 0; |
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2757 int first_arg_to_pass = 0; |
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2758 int total_c_args = 0; |
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2759 |
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2760 // Skip the receiver as dtrace doesn't want to see it |
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2761 if( !method->is_static() ) { |
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2762 in_sig_bt[i++] = T_OBJECT; |
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2763 first_arg_to_pass = 1; |
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2764 } |
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2765 |
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2766 // We need to convert the java args to where a native (non-jni) function |
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2767 // would expect them. To figure out where they go we convert the java |
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2768 // signature to a C signature. |
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2769 |
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2770 SignatureStream ss(method->signature()); |
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2771 for ( ; !ss.at_return_type(); ss.next()) { |
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2772 BasicType bt = ss.type(); |
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2773 in_sig_bt[i++] = bt; // Collect remaining bits of signature |
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2774 out_sig_bt[total_c_args++] = bt; |
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2775 if( bt == T_OBJECT) { |
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2776 Symbol* s = ss.as_symbol_or_null(); // symbol is created |
116
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2777 if (s == vmSymbols::java_lang_String()) { |
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2778 total_strings++; |
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2779 out_sig_bt[total_c_args-1] = T_ADDRESS; |
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2780 } else if (s == vmSymbols::java_lang_Boolean() || |
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2781 s == vmSymbols::java_lang_Character() || |
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2782 s == vmSymbols::java_lang_Byte() || |
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2783 s == vmSymbols::java_lang_Short() || |
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2784 s == vmSymbols::java_lang_Integer() || |
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2785 s == vmSymbols::java_lang_Float()) { |
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2786 out_sig_bt[total_c_args-1] = T_INT; |
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2787 } else if (s == vmSymbols::java_lang_Long() || |
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2788 s == vmSymbols::java_lang_Double()) { |
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2789 out_sig_bt[total_c_args-1] = T_LONG; |
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2790 out_sig_bt[total_c_args++] = T_VOID; |
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2791 } |
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2792 } else if ( bt == T_LONG || bt == T_DOUBLE ) { |
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2793 in_sig_bt[i++] = T_VOID; // Longs & doubles take 2 Java slots |
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2794 // We convert double to long |
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2795 out_sig_bt[total_c_args-1] = T_LONG; |
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2796 out_sig_bt[total_c_args++] = T_VOID; |
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2797 } else if ( bt == T_FLOAT) { |
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2798 // We convert float to int |
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2799 out_sig_bt[total_c_args-1] = T_INT; |
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2800 } |
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2801 } |
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2802 |
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2803 assert(i==total_args_passed, "validly parsed signature"); |
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2804 |
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2805 // Now get the compiled-Java layout as input arguments |
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2806 int comp_args_on_stack; |
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2807 comp_args_on_stack = SharedRuntime::java_calling_convention( |
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2808 in_sig_bt, in_regs, total_args_passed, false); |
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2809 |
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2810 // Now figure out where the args must be stored and how much stack space |
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2811 // they require (neglecting out_preserve_stack_slots but space for storing |
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2812 // the 1st six register arguments). It's weird see int_stk_helper. |
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2813 |
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2814 int out_arg_slots; |
14909 | 2815 out_arg_slots = c_calling_convention(out_sig_bt, out_regs, total_c_args); |
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2816 |
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2817 // Calculate the total number of stack slots we will need. |
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2818 |
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2819 // First count the abi requirement plus all of the outgoing args |
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2820 int stack_slots = SharedRuntime::out_preserve_stack_slots() + out_arg_slots; |
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2821 |
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2822 // Now space for the string(s) we must convert |
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2823 int* string_locs = NEW_RESOURCE_ARRAY(int, total_strings + 1); |
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2824 for (i = 0; i < total_strings ; i++) { |
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2825 string_locs[i] = stack_slots; |
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2826 stack_slots += max_dtrace_string_size / VMRegImpl::stack_slot_size; |
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2827 } |
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2828 |
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2829 // Plus the temps we might need to juggle register args |
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2830 // regs take two slots each |
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2831 stack_slots += (Argument::n_int_register_parameters_c + |
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2832 Argument::n_float_register_parameters_c) * 2; |
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2833 |
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2834 |
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2835 // + 4 for return address (which we own) and saved rbp, |
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2836 |
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2837 stack_slots += 4; |
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2838 |
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2839 // Ok The space we have allocated will look like: |
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2840 // |
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2841 // |
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2842 // FP-> | | |
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2843 // |---------------------| |
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2844 // | string[n] | |
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2845 // |---------------------| <- string_locs[n] |
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2846 // | string[n-1] | |
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2847 // |---------------------| <- string_locs[n-1] |
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2848 // | ... | |
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2849 // | ... | |
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2850 // |---------------------| <- string_locs[1] |
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2851 // | string[0] | |
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2852 // |---------------------| <- string_locs[0] |
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2853 // | outbound memory | |
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2854 // | based arguments | |
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2855 // | | |
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2856 // |---------------------| |
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2857 // | | |
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2858 // SP-> | out_preserved_slots | |
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2859 // |
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2860 // |
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2861 |
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2862 // Now compute actual number of stack words we need rounding to make |
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2863 // stack properly aligned. |
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2864 stack_slots = round_to(stack_slots, 4 * VMRegImpl::slots_per_word); |
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2865 |
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2866 int stack_size = stack_slots * VMRegImpl::stack_slot_size; |
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2867 |
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2868 intptr_t start = (intptr_t)__ pc(); |
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2869 |
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2870 // First thing make an ic check to see if we should even be here |
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2871 |
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2872 // We are free to use all registers as temps without saving them and |
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2873 // restoring them except rbp. rbp, is the only callee save register |
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2874 // as far as the interpreter and the compiler(s) are concerned. |
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2875 |
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2876 const Register ic_reg = rax; |
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2877 const Register receiver = rcx; |
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2878 Label hit; |
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2879 Label exception_pending; |
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2880 |
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2881 |
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2882 __ verify_oop(receiver); |
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2883 __ cmpl(ic_reg, Address(receiver, oopDesc::klass_offset_in_bytes())); |
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2884 __ jcc(Assembler::equal, hit); |
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2885 |
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2886 __ jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub())); |
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2887 |
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2888 // verified entry must be aligned for code patching. |
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2889 // and the first 5 bytes must be in the same cache line |
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2890 // if we align at 8 then we will be sure 5 bytes are in the same line |
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2891 __ align(8); |
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2892 |
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2893 __ bind(hit); |
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2894 |
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2895 int vep_offset = ((intptr_t)__ pc()) - start; |
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2896 |
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2897 |
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2898 // The instruction at the verified entry point must be 5 bytes or longer |
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2899 // because it can be patched on the fly by make_non_entrant. The stack bang |
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2900 // instruction fits that requirement. |
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2901 |
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2902 // Generate stack overflow check |
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2903 |
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2904 if (UseStackBanging) { |
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2905 if (stack_size <= StackShadowPages*os::vm_page_size()) { |
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2906 __ bang_stack_with_offset(StackShadowPages*os::vm_page_size()); |
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2907 } else { |
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2908 __ movl(rax, stack_size); |
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2909 __ bang_stack_size(rax, rbx); |
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2910 } |
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2911 } else { |
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2912 // need a 5 byte instruction to allow MT safe patching to non-entrant |
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2913 __ fat_nop(); |
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2914 } |
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2915 |
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2916 assert(((uintptr_t)__ pc() - start - vep_offset) >= 5, |
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2917 "valid size for make_non_entrant"); |
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2918 |
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2919 // Generate a new frame for the wrapper. |
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2920 __ enter(); |
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2921 |
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2922 // -4 because return address is already present and so is saved rbp, |
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2923 if (stack_size - 2*wordSize != 0) { |
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2924 __ subq(rsp, stack_size - 2*wordSize); |
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2925 } |
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2926 |
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2927 // Frame is now completed as far a size and linkage. |
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2928 |
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2929 int frame_complete = ((intptr_t)__ pc()) - start; |
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2930 |
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2931 int c_arg, j_arg; |
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2932 |
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2933 // State of input register args |
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2934 |
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2935 bool live[ConcreteRegisterImpl::number_of_registers]; |
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2936 |
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2937 live[j_rarg0->as_VMReg()->value()] = false; |
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2938 live[j_rarg1->as_VMReg()->value()] = false; |
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2939 live[j_rarg2->as_VMReg()->value()] = false; |
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2940 live[j_rarg3->as_VMReg()->value()] = false; |
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2941 live[j_rarg4->as_VMReg()->value()] = false; |
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2942 live[j_rarg5->as_VMReg()->value()] = false; |
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2943 |
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2944 live[j_farg0->as_VMReg()->value()] = false; |
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2945 live[j_farg1->as_VMReg()->value()] = false; |
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2946 live[j_farg2->as_VMReg()->value()] = false; |
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2947 live[j_farg3->as_VMReg()->value()] = false; |
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2948 live[j_farg4->as_VMReg()->value()] = false; |
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2949 live[j_farg5->as_VMReg()->value()] = false; |
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2950 live[j_farg6->as_VMReg()->value()] = false; |
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2951 live[j_farg7->as_VMReg()->value()] = false; |
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2952 |
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2953 |
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2954 bool rax_is_zero = false; |
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2955 |
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2956 // All args (except strings) destined for the stack are moved first |
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2957 for (j_arg = first_arg_to_pass, c_arg = 0 ; |
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2958 j_arg < total_args_passed ; j_arg++, c_arg++ ) { |
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2959 VMRegPair src = in_regs[j_arg]; |
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2960 VMRegPair dst = out_regs[c_arg]; |
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2961 |
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2962 // Get the real reg value or a dummy (rsp) |
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|
2963 |
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|
2964 int src_reg = src.first()->is_reg() ? |
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2965 src.first()->value() : |
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|
2966 rsp->as_VMReg()->value(); |
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|
2967 |
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|
2968 bool useless = in_sig_bt[j_arg] == T_ARRAY || |
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2969 (in_sig_bt[j_arg] == T_OBJECT && |
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2970 out_sig_bt[c_arg] != T_INT && |
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2971 out_sig_bt[c_arg] != T_ADDRESS && |
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|
2972 out_sig_bt[c_arg] != T_LONG); |
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|
2973 |
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2974 live[src_reg] = !useless; |
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|
2975 |
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|
2976 if (dst.first()->is_stack()) { |
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diff
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|
2977 |
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|
2978 // Even though a string arg in a register is still live after this loop |
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2979 // after the string conversion loop (next) it will be dead so we take |
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2980 // advantage of that now for simpler code to manage live. |
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|
2981 |
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|
2982 live[src_reg] = false; |
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|
2983 switch (in_sig_bt[j_arg]) { |
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|
2984 |
018d5b58dd4f
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|
2985 case T_ARRAY: |
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diff
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|
2986 case T_OBJECT: |
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|
2987 { |
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|
2988 Address stack_dst(rsp, reg2offset_out(dst.first())); |
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kamg
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113
diff
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|
2989 |
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113
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|
2990 if (out_sig_bt[c_arg] == T_INT || out_sig_bt[c_arg] == T_LONG) { |
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|
2991 // need to unbox a one-word value |
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2992 Register in_reg = rax; |
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2993 if ( src.first()->is_reg() ) { |
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|
2994 in_reg = src.first()->as_Register(); |
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|
2995 } else { |
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|
2996 __ movq(rax, Address(rbp, reg2offset_in(src.first()))); |
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|
2997 rax_is_zero = false; |
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diff
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|
2998 } |
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diff
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|
2999 Label skipUnbox; |
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|
3000 __ movptr(Address(rsp, reg2offset_out(dst.first())), |
018d5b58dd4f
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|
3001 (int32_t)NULL_WORD); |
018d5b58dd4f
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113
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|
3002 __ testq(in_reg, in_reg); |
018d5b58dd4f
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113
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|
3003 __ jcc(Assembler::zero, skipUnbox); |
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kamg
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113
diff
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|
3004 |
165
437d03ea40b1
6703888: Compressed Oops: use the 32-bits gap after klass in a object
kvn
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116
diff
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|
3005 BasicType bt = out_sig_bt[c_arg]; |
437d03ea40b1
6703888: Compressed Oops: use the 32-bits gap after klass in a object
kvn
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116
diff
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|
3006 int box_offset = java_lang_boxing_object::value_offset_in_bytes(bt); |
116
018d5b58dd4f
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kamg
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|
3007 Address src1(in_reg, box_offset); |
165
437d03ea40b1
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kvn
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|
3008 if ( bt == T_LONG ) { |
116
018d5b58dd4f
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|
3009 __ movq(in_reg, src1); |
018d5b58dd4f
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|
3010 __ movq(stack_dst, in_reg); |
018d5b58dd4f
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113
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|
3011 assert(out_sig_bt[c_arg+1] == T_VOID, "must be"); |
018d5b58dd4f
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|
3012 ++c_arg; // skip over T_VOID to keep the loop indices in sync |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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113
diff
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|
3013 } else { |
018d5b58dd4f
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113
diff
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|
3014 __ movl(in_reg, src1); |
018d5b58dd4f
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113
diff
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|
3015 __ movl(stack_dst, in_reg); |
018d5b58dd4f
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kamg
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113
diff
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|
3016 } |
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6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3017 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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113
diff
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|
3018 __ bind(skipUnbox); |
018d5b58dd4f
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kamg
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113
diff
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|
3019 } else if (out_sig_bt[c_arg] != T_ADDRESS) { |
018d5b58dd4f
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113
diff
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|
3020 // Convert the arg to NULL |
018d5b58dd4f
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kamg
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113
diff
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|
3021 if (!rax_is_zero) { |
018d5b58dd4f
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113
diff
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|
3022 __ xorq(rax, rax); |
018d5b58dd4f
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113
diff
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|
3023 rax_is_zero = true; |
018d5b58dd4f
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kamg
parents:
113
diff
changeset
|
3024 } |
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6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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113
diff
changeset
|
3025 __ movq(stack_dst, rax); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3026 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3027 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3028 break; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3029 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3030 case T_VOID: |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3031 break; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3032 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3033 case T_FLOAT: |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3034 // This does the right thing since we know it is destined for the |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3035 // stack |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3036 float_move(masm, src, dst); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3037 break; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3038 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3039 case T_DOUBLE: |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
3040 // This does the right thing since we know it is destined for the |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
3041 // stack |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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113
diff
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|
3042 double_move(masm, src, dst); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3043 break; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3044 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3045 case T_LONG : |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3046 long_move(masm, src, dst); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3047 break; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3048 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3049 case T_ADDRESS: assert(false, "found T_ADDRESS in java args"); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3050 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3051 default: |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3052 move32_64(masm, src, dst); |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3053 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3054 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3055 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3056 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3057 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3058 // If we have any strings we must store any register based arg to the stack |
018d5b58dd4f
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113
diff
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|
3059 // This includes any still live xmm registers too. |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3060 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3061 int sid = 0; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3062 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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113
diff
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|
3063 if (total_strings > 0 ) { |
018d5b58dd4f
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kamg
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113
diff
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|
3064 for (j_arg = first_arg_to_pass, c_arg = 0 ; |
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kamg
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113
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|
3065 j_arg < total_args_passed ; j_arg++, c_arg++ ) { |
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6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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113
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|
3066 VMRegPair src = in_regs[j_arg]; |
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113
diff
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|
3067 VMRegPair dst = out_regs[c_arg]; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3068 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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113
diff
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|
3069 if (src.first()->is_reg()) { |
018d5b58dd4f
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113
diff
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|
3070 Address src_tmp(rbp, fp_offset[src.first()->value()]); |
018d5b58dd4f
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kamg
parents:
113
diff
changeset
|
3071 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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113
diff
changeset
|
3072 // string oops were left untouched by the previous loop even if the |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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113
diff
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|
3073 // eventual (converted) arg is destined for the stack so park them |
018d5b58dd4f
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113
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|
3074 // away now (except for first) |
018d5b58dd4f
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kamg
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113
diff
changeset
|
3075 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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113
diff
changeset
|
3076 if (out_sig_bt[c_arg] == T_ADDRESS) { |
018d5b58dd4f
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kamg
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113
diff
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|
3077 Address utf8_addr = Address( |
018d5b58dd4f
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113
diff
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|
3078 rsp, string_locs[sid++] * VMRegImpl::stack_slot_size); |
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kamg
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113
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|
3079 if (sid != 1) { |
018d5b58dd4f
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kamg
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113
diff
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|
3080 // The first string arg won't be killed until after the utf8 |
018d5b58dd4f
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113
diff
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|
3081 // conversion |
018d5b58dd4f
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113
diff
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|
3082 __ movq(utf8_addr, src.first()->as_Register()); |
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|
3083 } |
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3084 } else if (dst.first()->is_reg()) { |
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3085 if (in_sig_bt[j_arg] == T_FLOAT || in_sig_bt[j_arg] == T_DOUBLE) { |
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3086 |
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3087 // Convert the xmm register to an int and store it in the reserved |
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3088 // location for the eventual c register arg |
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3089 XMMRegister f = src.first()->as_XMMRegister(); |
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3090 if (in_sig_bt[j_arg] == T_FLOAT) { |
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3091 __ movflt(src_tmp, f); |
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3092 } else { |
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3093 __ movdbl(src_tmp, f); |
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3094 } |
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3095 } else { |
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3096 // If the arg is an oop type we don't support don't bother to store |
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3097 // it remember string was handled above. |
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3098 bool useless = in_sig_bt[j_arg] == T_ARRAY || |
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3099 (in_sig_bt[j_arg] == T_OBJECT && |
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3100 out_sig_bt[c_arg] != T_INT && |
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3101 out_sig_bt[c_arg] != T_LONG); |
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3102 |
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3103 if (!useless) { |
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3104 __ movq(src_tmp, src.first()->as_Register()); |
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3105 } |
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|
3106 } |
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|
3107 } |
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|
3108 } |
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3109 if (in_sig_bt[j_arg] == T_OBJECT && out_sig_bt[c_arg] == T_LONG) { |
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3110 assert(out_sig_bt[c_arg+1] == T_VOID, "must be"); |
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3111 ++c_arg; // skip over T_VOID to keep the loop indices in sync |
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3112 } |
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|
3113 } |
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|
3114 |
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3115 // Now that the volatile registers are safe, convert all the strings |
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3116 sid = 0; |
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|
3117 |
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3118 for (j_arg = first_arg_to_pass, c_arg = 0 ; |
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3119 j_arg < total_args_passed ; j_arg++, c_arg++ ) { |
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3120 if (out_sig_bt[c_arg] == T_ADDRESS) { |
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3121 // It's a string |
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3122 Address utf8_addr = Address( |
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3123 rsp, string_locs[sid++] * VMRegImpl::stack_slot_size); |
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3124 // The first string we find might still be in the original java arg |
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3125 // register |
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3126 |
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3127 VMReg src = in_regs[j_arg].first(); |
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3128 |
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3129 // We will need to eventually save the final argument to the trap |
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3130 // in the von-volatile location dedicated to src. This is the offset |
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3131 // from fp we will use. |
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3132 int src_off = src->is_reg() ? |
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3133 fp_offset[src->value()] : reg2offset_in(src); |
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3134 |
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3135 // This is where the argument will eventually reside |
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3136 VMRegPair dst = out_regs[c_arg]; |
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3137 |
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3138 if (src->is_reg()) { |
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3139 if (sid == 1) { |
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3140 __ movq(c_rarg0, src->as_Register()); |
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3141 } else { |
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|
3142 __ movq(c_rarg0, utf8_addr); |
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|
3143 } |
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|
3144 } else { |
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3145 // arg is still in the original location |
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3146 __ movq(c_rarg0, Address(rbp, reg2offset_in(src))); |
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|
3147 } |
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|
3148 Label done, convert; |
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|
3149 |
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|
3150 // see if the oop is NULL |
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|
3151 __ testq(c_rarg0, c_rarg0); |
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3152 __ jcc(Assembler::notEqual, convert); |
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|
3153 |
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|
3154 if (dst.first()->is_reg()) { |
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3155 // Save the ptr to utf string in the origina src loc or the tmp |
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|
3156 // dedicated to it |
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|
3157 __ movq(Address(rbp, src_off), c_rarg0); |
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|
3158 } else { |
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|
3159 __ movq(Address(rsp, reg2offset_out(dst.first())), c_rarg0); |
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|
3160 } |
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|
3161 __ jmp(done); |
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|
3162 |
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|
3163 __ bind(convert); |
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|
3164 |
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|
3165 __ lea(c_rarg1, utf8_addr); |
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3166 if (dst.first()->is_reg()) { |
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|
3167 __ movq(Address(rbp, src_off), c_rarg1); |
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|
3168 } else { |
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|
3169 __ movq(Address(rsp, reg2offset_out(dst.first())), c_rarg1); |
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|
3170 } |
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|
3171 // And do the conversion |
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|
3172 __ call(RuntimeAddress( |
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|
3173 CAST_FROM_FN_PTR(address, SharedRuntime::get_utf))); |
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|
3174 |
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|
3175 __ bind(done); |
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|
3176 } |
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|
3177 if (in_sig_bt[j_arg] == T_OBJECT && out_sig_bt[c_arg] == T_LONG) { |
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3178 assert(out_sig_bt[c_arg+1] == T_VOID, "must be"); |
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|
3179 ++c_arg; // skip over T_VOID to keep the loop indices in sync |
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|
3180 } |
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|
3181 } |
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|
3182 // The get_utf call killed all the c_arg registers |
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3183 live[c_rarg0->as_VMReg()->value()] = false; |
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3184 live[c_rarg1->as_VMReg()->value()] = false; |
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|
3185 live[c_rarg2->as_VMReg()->value()] = false; |
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3186 live[c_rarg3->as_VMReg()->value()] = false; |
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3187 live[c_rarg4->as_VMReg()->value()] = false; |
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3188 live[c_rarg5->as_VMReg()->value()] = false; |
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|
3189 |
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|
3190 live[c_farg0->as_VMReg()->value()] = false; |
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|
3191 live[c_farg1->as_VMReg()->value()] = false; |
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3192 live[c_farg2->as_VMReg()->value()] = false; |
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3193 live[c_farg3->as_VMReg()->value()] = false; |
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3194 live[c_farg4->as_VMReg()->value()] = false; |
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3195 live[c_farg5->as_VMReg()->value()] = false; |
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3196 live[c_farg6->as_VMReg()->value()] = false; |
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3197 live[c_farg7->as_VMReg()->value()] = false; |
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3198 } |
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|
3199 |
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|
3200 // Now we can finally move the register args to their desired locations |
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3201 |
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3202 rax_is_zero = false; |
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3203 |
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3204 for (j_arg = first_arg_to_pass, c_arg = 0 ; |
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3205 j_arg < total_args_passed ; j_arg++, c_arg++ ) { |
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3206 |
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3207 VMRegPair src = in_regs[j_arg]; |
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3208 VMRegPair dst = out_regs[c_arg]; |
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3209 |
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3210 // Only need to look for args destined for the interger registers (since we |
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3211 // convert float/double args to look like int/long outbound) |
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3212 if (dst.first()->is_reg()) { |
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3213 Register r = dst.first()->as_Register(); |
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3214 |
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3215 // Check if the java arg is unsupported and thereofre useless |
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3216 bool useless = in_sig_bt[j_arg] == T_ARRAY || |
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3217 (in_sig_bt[j_arg] == T_OBJECT && |
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3218 out_sig_bt[c_arg] != T_INT && |
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3219 out_sig_bt[c_arg] != T_ADDRESS && |
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3220 out_sig_bt[c_arg] != T_LONG); |
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3221 |
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3222 |
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3223 // If we're going to kill an existing arg save it first |
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3224 if (live[dst.first()->value()]) { |
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3225 // you can't kill yourself |
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3226 if (src.first() != dst.first()) { |
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3227 __ movq(Address(rbp, fp_offset[dst.first()->value()]), r); |
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3228 } |
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3229 } |
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3230 if (src.first()->is_reg()) { |
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3231 if (live[src.first()->value()] ) { |
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3232 if (in_sig_bt[j_arg] == T_FLOAT) { |
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3233 __ movdl(r, src.first()->as_XMMRegister()); |
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3234 } else if (in_sig_bt[j_arg] == T_DOUBLE) { |
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3235 __ movdq(r, src.first()->as_XMMRegister()); |
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3236 } else if (r != src.first()->as_Register()) { |
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3237 if (!useless) { |
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3238 __ movq(r, src.first()->as_Register()); |
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3239 } |
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3240 } |
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3241 } else { |
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3242 // If the arg is an oop type we don't support don't bother to store |
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3243 // it |
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3244 if (!useless) { |
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3245 if (in_sig_bt[j_arg] == T_DOUBLE || |
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3246 in_sig_bt[j_arg] == T_LONG || |
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3247 in_sig_bt[j_arg] == T_OBJECT ) { |
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3248 __ movq(r, Address(rbp, fp_offset[src.first()->value()])); |
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3249 } else { |
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3250 __ movl(r, Address(rbp, fp_offset[src.first()->value()])); |
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3251 } |
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3252 } |
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3253 } |
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3254 live[src.first()->value()] = false; |
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3255 } else if (!useless) { |
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3256 // full sized move even for int should be ok |
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3257 __ movq(r, Address(rbp, reg2offset_in(src.first()))); |
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3258 } |
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3259 |
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3260 // At this point r has the original java arg in the final location |
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3261 // (assuming it wasn't useless). If the java arg was an oop |
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3262 // we have a bit more to do |
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3263 |
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3264 if (in_sig_bt[j_arg] == T_ARRAY || in_sig_bt[j_arg] == T_OBJECT ) { |
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3265 if (out_sig_bt[c_arg] == T_INT || out_sig_bt[c_arg] == T_LONG) { |
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3266 // need to unbox a one-word value |
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3267 Label skip; |
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3268 __ testq(r, r); |
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3269 __ jcc(Assembler::equal, skip); |
165
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3270 BasicType bt = out_sig_bt[c_arg]; |
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3271 int box_offset = java_lang_boxing_object::value_offset_in_bytes(bt); |
116
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3272 Address src1(r, box_offset); |
165
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3273 if ( bt == T_LONG ) { |
116
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3274 __ movq(r, src1); |
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3275 } else { |
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3276 __ movl(r, src1); |
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3277 } |
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3278 __ bind(skip); |
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3279 |
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3280 } else if (out_sig_bt[c_arg] != T_ADDRESS) { |
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3281 // Convert the arg to NULL |
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3282 __ xorq(r, r); |
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3283 } |
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3284 } |
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3285 |
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3286 // dst can longer be holding an input value |
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3287 live[dst.first()->value()] = false; |
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3288 } |
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3289 if (in_sig_bt[j_arg] == T_OBJECT && out_sig_bt[c_arg] == T_LONG) { |
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3290 assert(out_sig_bt[c_arg+1] == T_VOID, "must be"); |
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3291 ++c_arg; // skip over T_VOID to keep the loop indices in sync |
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3292 } |
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3293 } |
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3294 |
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3295 |
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3296 // Ok now we are done. Need to place the nop that dtrace wants in order to |
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3297 // patch in the trap |
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3298 int patch_offset = ((intptr_t)__ pc()) - start; |
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3299 |
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3300 __ nop(); |
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3301 |
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3302 |
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3303 // Return |
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3304 |
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3305 __ leave(); |
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3306 __ ret(0); |
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3307 |
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3308 __ flush(); |
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3309 |
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3310 nmethod *nm = nmethod::new_dtrace_nmethod( |
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3311 method, masm->code(), vep_offset, patch_offset, frame_complete, |
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3312 stack_slots / VMRegImpl::slots_per_word); |
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3313 return nm; |
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3314 |
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3315 } |
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3316 |
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3317 #endif // HAVE_DTRACE_H |
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3318 |
0 | 3319 // this function returns the adjust size (in number of words) to a c2i adapter |
3320 // activation for use during deoptimization | |
3321 int Deoptimization::last_frame_adjust(int callee_parameters, int callee_locals ) { | |
1506 | 3322 return (callee_locals - callee_parameters) * Interpreter::stackElementWords; |
0 | 3323 } |
3324 | |
3325 | |
3326 uint SharedRuntime::out_preserve_stack_slots() { | |
3327 return 0; | |
3328 } | |
3329 | |
3330 //------------------------------generate_deopt_blob---------------------------- | |
3331 void SharedRuntime::generate_deopt_blob() { | |
3332 // Allocate space for the code | |
3333 ResourceMark rm; | |
3334 // Setup code generation tools | |
3335 CodeBuffer buffer("deopt_blob", 2048, 1024); | |
3336 MacroAssembler* masm = new MacroAssembler(&buffer); | |
3337 int frame_size_in_words; | |
3338 OopMap* map = NULL; | |
3339 OopMapSet *oop_maps = new OopMapSet(); | |
3340 | |
3341 // ------------- | |
3342 // This code enters when returning to a de-optimized nmethod. A return | |
3343 // address has been pushed on the the stack, and return values are in | |
3344 // registers. | |
3345 // If we are doing a normal deopt then we were called from the patched | |
3346 // nmethod from the point we returned to the nmethod. So the return | |
3347 // address on the stack is wrong by NativeCall::instruction_size | |
3348 // We will adjust the value so it looks like we have the original return | |
3349 // address on the stack (like when we eagerly deoptimized). | |
3350 // In the case of an exception pending when deoptimizing, we enter | |
3351 // with a return address on the stack that points after the call we patched | |
3352 // into the exception handler. We have the following register state from, | |
3353 // e.g., the forward exception stub (see stubGenerator_x86_64.cpp). | |
3354 // rax: exception oop | |
3355 // rbx: exception handler | |
3356 // rdx: throwing pc | |
3357 // So in this case we simply jam rdx into the useless return address and | |
3358 // the stack looks just like we want. | |
3359 // | |
3360 // At this point we need to de-opt. We save the argument return | |
3361 // registers. We call the first C routine, fetch_unroll_info(). This | |
3362 // routine captures the return values and returns a structure which | |
3363 // describes the current frame size and the sizes of all replacement frames. | |
3364 // The current frame is compiled code and may contain many inlined | |
3365 // functions, each with their own JVM state. We pop the current frame, then | |
3366 // push all the new frames. Then we call the C routine unpack_frames() to | |
3367 // populate these frames. Finally unpack_frames() returns us the new target | |
3368 // address. Notice that callee-save registers are BLOWN here; they have | |
3369 // already been captured in the vframeArray at the time the return PC was | |
3370 // patched. | |
3371 address start = __ pc(); | |
3372 Label cont; | |
3373 | |
3374 // Prolog for non exception case! | |
3375 | |
3376 // Save everything in sight. | |
3377 map = RegisterSaver::save_live_registers(masm, 0, &frame_size_in_words); | |
3378 | |
3379 // Normal deoptimization. Save exec mode for unpack_frames. | |
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0
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3380 __ movl(r14, Deoptimization::Unpack_deopt); // callee-saved |
0 | 3381 __ jmp(cont); |
304 | 3382 |
3383 int reexecute_offset = __ pc() - start; | |
14124
7ad529321294
make: remove GRAALVM and introduce COMPILERGRAAL. fix client hosted-mode
Bernhard Urban <bernhard.urban@jku.at>
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14030
diff
changeset
|
3384 #if defined(COMPILERGRAAL) && !defined(COMPILER1) |
9112
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minor HotSpot deoptimization cleanups
Christian Haeubl <haeubl@ssw.jku.at>
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|
3385 // Graal does not use this kind of deoptimization |
6c33b2076d7c
minor HotSpot deoptimization cleanups
Christian Haeubl <haeubl@ssw.jku.at>
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diff
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|
3386 __ should_not_reach_here(); |
6c33b2076d7c
minor HotSpot deoptimization cleanups
Christian Haeubl <haeubl@ssw.jku.at>
parents:
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diff
changeset
|
3387 #endif |
304 | 3388 |
3389 // Reexecute case | |
3390 // return address is the pc describes what bci to do re-execute at | |
3391 | |
3392 // No need to update map as each call to save_live_registers will produce identical oopmap | |
3393 (void) RegisterSaver::save_live_registers(masm, 0, &frame_size_in_words); | |
3394 | |
3395 __ movl(r14, Deoptimization::Unpack_reexecute); // callee-saved | |
3396 __ jmp(cont); | |
3397 | |
9112
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minor HotSpot deoptimization cleanups
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diff
changeset
|
3398 #ifdef GRAAL |
6c33b2076d7c
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Christian Haeubl <haeubl@ssw.jku.at>
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diff
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|
3399 int implicit_exception_uncommon_trap_offset = __ pc() - start; |
15104 | 3400 |
10409 | 3401 __ pushptr(Address(r15_thread, in_bytes(JavaThread::graal_implicit_exception_pc_offset()))); |
9112
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Christian Haeubl <haeubl@ssw.jku.at>
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diff
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|
3402 |
6c33b2076d7c
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|
3403 // Save everything in sight. |
6c33b2076d7c
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Christian Haeubl <haeubl@ssw.jku.at>
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diff
changeset
|
3404 RegisterSaver::save_live_registers(masm, 0, &frame_size_in_words); |
6c33b2076d7c
minor HotSpot deoptimization cleanups
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
3405 // fetch_unroll_info needs to call last_java_frame() |
6c33b2076d7c
minor HotSpot deoptimization cleanups
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
3406 __ set_last_Java_frame(noreg, noreg, NULL); |
6c33b2076d7c
minor HotSpot deoptimization cleanups
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
3407 |
6c33b2076d7c
minor HotSpot deoptimization cleanups
Christian Haeubl <haeubl@ssw.jku.at>
parents:
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diff
changeset
|
3408 __ movl(c_rarg1, Address(r15_thread, in_bytes(ThreadShadow::pending_deoptimization_offset()))); |
6c33b2076d7c
minor HotSpot deoptimization cleanups
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
3409 __ movl(Address(r15_thread, in_bytes(ThreadShadow::pending_deoptimization_offset())), -1); |
6c33b2076d7c
minor HotSpot deoptimization cleanups
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
3410 |
6c33b2076d7c
minor HotSpot deoptimization cleanups
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
3411 __ movl(r14, (int32_t)Deoptimization::Unpack_reexecute); |
6c33b2076d7c
minor HotSpot deoptimization cleanups
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
3412 __ mov(c_rarg0, r15_thread); |
6c33b2076d7c
minor HotSpot deoptimization cleanups
Christian Haeubl <haeubl@ssw.jku.at>
parents:
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diff
changeset
|
3413 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, Deoptimization::uncommon_trap))); |
6c33b2076d7c
minor HotSpot deoptimization cleanups
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
3414 oop_maps->add_gc_map( __ pc()-start, map->deep_copy()); |
6c33b2076d7c
minor HotSpot deoptimization cleanups
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
3415 |
6c33b2076d7c
minor HotSpot deoptimization cleanups
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
3416 __ reset_last_Java_frame(false, false); |
6c33b2076d7c
minor HotSpot deoptimization cleanups
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
3417 |
6c33b2076d7c
minor HotSpot deoptimization cleanups
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
3418 Label after_fetch_unroll_info_call; |
6c33b2076d7c
minor HotSpot deoptimization cleanups
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
3419 __ jmp(after_fetch_unroll_info_call); |
6c33b2076d7c
minor HotSpot deoptimization cleanups
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
3420 #endif // GRAAL |
6c33b2076d7c
minor HotSpot deoptimization cleanups
Christian Haeubl <haeubl@ssw.jku.at>
parents:
8883
diff
changeset
|
3421 |
0 | 3422 int exception_offset = __ pc() - start; |
3423 | |
3424 // Prolog for exception case | |
3425 | |
304 | 3426 // all registers are dead at this entry point, except for rax, and |
3427 // rdx which contain the exception oop and exception pc | |
3428 // respectively. Set them in TLS and fall thru to the | |
3429 // unpack_with_exception_in_tls entry point. | |
3430 | |
3431 __ movptr(Address(r15_thread, JavaThread::exception_pc_offset()), rdx); | |
3432 __ movptr(Address(r15_thread, JavaThread::exception_oop_offset()), rax); | |
3433 | |
3434 int exception_in_tls_offset = __ pc() - start; | |
3435 | |
3436 // new implementation because exception oop is now passed in JavaThread | |
3437 | |
3438 // Prolog for exception case | |
3439 // All registers must be preserved because they might be used by LinearScan | |
3440 // Exceptiop oop and throwing PC are passed in JavaThread | |
3441 // tos: stack at point of call to method that threw the exception (i.e. only | |
3442 // args are on the stack, no return address) | |
3443 | |
3444 // make room on stack for the return address | |
3445 // It will be patched later with the throwing pc. The correct value is not | |
3446 // available now because loading it from memory would destroy registers. | |
3447 __ push(0); | |
0 | 3448 |
3449 // Save everything in sight. | |
3450 map = RegisterSaver::save_live_registers(masm, 0, &frame_size_in_words); | |
3451 | |
304 | 3452 // Now it is safe to overwrite any register |
3453 | |
0 | 3454 // Deopt during an exception. Save exec mode for unpack_frames. |
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0
diff
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|
3455 __ movl(r14, Deoptimization::Unpack_exception); // callee-saved |
0 | 3456 |
304 | 3457 // load throwing pc from JavaThread and patch it as the return address |
3458 // of the current frame. Then clear the field in JavaThread | |
3459 | |
3460 __ movptr(rdx, Address(r15_thread, JavaThread::exception_pc_offset())); | |
3461 __ movptr(Address(rbp, wordSize), rdx); | |
3462 __ movptr(Address(r15_thread, JavaThread::exception_pc_offset()), (int32_t)NULL_WORD); | |
3463 | |
3464 #ifdef ASSERT | |
3465 // verify that there is really an exception oop in JavaThread | |
3466 __ movptr(rax, Address(r15_thread, JavaThread::exception_oop_offset())); | |
3467 __ verify_oop(rax); | |
3468 | |
3469 // verify that there is no pending exception | |
3470 Label no_pending_exception; | |
3471 __ movptr(rax, Address(r15_thread, Thread::pending_exception_offset())); | |
3472 __ testptr(rax, rax); | |
3473 __ jcc(Assembler::zero, no_pending_exception); | |
3474 __ stop("must not have pending exception here"); | |
3475 __ bind(no_pending_exception); | |
3476 #endif | |
3477 | |
0 | 3478 __ bind(cont); |
3479 | |
3480 // Call C code. Need thread and this frame, but NOT official VM entry | |
3481 // crud. We cannot block on this call, no GC can happen. | |
3482 // | |
3483 // UnrollBlock* fetch_unroll_info(JavaThread* thread) | |
3484 | |
3485 // fetch_unroll_info needs to call last_java_frame(). | |
3486 | |
3487 __ set_last_Java_frame(noreg, noreg, NULL); | |
3488 #ifdef ASSERT | |
3489 { Label L; | |
304 | 3490 __ cmpptr(Address(r15_thread, |
0 | 3491 JavaThread::last_Java_fp_offset()), |
304 | 3492 (int32_t)0); |
0 | 3493 __ jcc(Assembler::equal, L); |
3494 __ stop("SharedRuntime::generate_deopt_blob: last_Java_fp not cleared"); | |
3495 __ bind(L); | |
3496 } | |
3497 #endif // ASSERT | |
304 | 3498 __ mov(c_rarg0, r15_thread); |
0 | 3499 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, Deoptimization::fetch_unroll_info))); |
3500 | |
3501 // Need to have an oopmap that tells fetch_unroll_info where to | |
3502 // find any register it might need. | |
3503 oop_maps->add_gc_map(__ pc() - start, map); | |
3504 | |
3505 __ reset_last_Java_frame(false, false); | |
3506 | |
4985
0d2a2797a61f
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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4984
diff
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|
3507 #ifdef GRAAL |
2059
9508a52cbd32
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Thomas Wuerthinger <wuerthinger@ssw.jku.at>
parents:
1972
diff
changeset
|
3508 __ bind(after_fetch_unroll_info_call); |
4985
0d2a2797a61f
2 more #ifdef GRAAL
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
4984
diff
changeset
|
3509 #endif |
2059
9508a52cbd32
Add deoptimization blob support.
Thomas Wuerthinger <wuerthinger@ssw.jku.at>
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diff
changeset
|
3510 |
0 | 3511 // Load UnrollBlock* into rdi |
304 | 3512 __ mov(rdi, rax); |
3513 | |
3514 Label noException; | |
682
69aefafe69c1
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never
parents:
628
diff
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|
3515 __ cmpl(r14, Deoptimization::Unpack_exception); // Was exception pending? |
304 | 3516 __ jcc(Assembler::notEqual, noException); |
3517 __ movptr(rax, Address(r15_thread, JavaThread::exception_oop_offset())); | |
3518 // QQQ this is useless it was NULL above | |
3519 __ movptr(rdx, Address(r15_thread, JavaThread::exception_pc_offset())); | |
3520 __ movptr(Address(r15_thread, JavaThread::exception_oop_offset()), (int32_t)NULL_WORD); | |
3521 __ movptr(Address(r15_thread, JavaThread::exception_pc_offset()), (int32_t)NULL_WORD); | |
3522 | |
3523 __ verify_oop(rax); | |
3524 | |
3525 // Overwrite the result registers with the exception results. | |
3526 __ movptr(Address(rsp, RegisterSaver::rax_offset_in_bytes()), rax); | |
3527 // I think this is useless | |
3528 __ movptr(Address(rsp, RegisterSaver::rdx_offset_in_bytes()), rdx); | |
3529 | |
3530 __ bind(noException); | |
0 | 3531 |
3532 // Only register save data is on the stack. | |
3533 // Now restore the result registers. Everything else is either dead | |
3534 // or captured in the vframeArray. | |
3535 RegisterSaver::restore_result_registers(masm); | |
3536 | |
3537 // All of the register save area has been popped of the stack. Only the | |
3538 // return address remains. | |
3539 | |
3540 // Pop all the frames we must move/replace. | |
3541 // | |
3542 // Frame picture (youngest to oldest) | |
3543 // 1: self-frame (no frame link) | |
3544 // 2: deopting frame (no frame link) | |
3545 // 3: caller of deopting frame (could be compiled/interpreted). | |
3546 // | |
3547 // Note: by leaving the return address of self-frame on the stack | |
3548 // and using the size of frame 2 to adjust the stack | |
3549 // when we are done the return to frame 3 will still be on the stack. | |
3550 | |
3551 // Pop deoptimized frame | |
3552 __ movl(rcx, Address(rdi, Deoptimization::UnrollBlock::size_of_deoptimized_frame_offset_in_bytes())); | |
304 | 3553 __ addptr(rsp, rcx); |
0 | 3554 |
3555 // rsp should be pointing at the return address to the caller (3) | |
3556 | |
13384
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10998
diff
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|
3557 // Pick up the initial fp we should save |
fca8f4799229
8028308: nsk regression, assert(obj->is_oop()) failed: not an oop
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10998
diff
changeset
|
3558 // restore rbp before stack bang because if stack overflow is thrown it needs to be pushed (and preserved) |
fca8f4799229
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roland
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10998
diff
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|
3559 __ movptr(rbp, Address(rdi, Deoptimization::UnrollBlock::initial_info_offset_in_bytes())); |
fca8f4799229
8028308: nsk regression, assert(obj->is_oop()) failed: not an oop
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|
3560 |
0 | 3561 // Stack bang to make sure there's enough room for these interpreter frames. |
3562 if (UseStackBanging) { | |
3563 __ movl(rbx, Address(rdi, Deoptimization::UnrollBlock::total_frame_sizes_offset_in_bytes())); | |
3564 __ bang_stack_size(rbx, rcx); | |
3565 } | |
3566 | |
3567 // Load address of array of frame pcs into rcx | |
304 | 3568 __ movptr(rcx, Address(rdi, Deoptimization::UnrollBlock::frame_pcs_offset_in_bytes())); |
0 | 3569 |
3570 // Trash the old pc | |
304 | 3571 __ addptr(rsp, wordSize); |
0 | 3572 |
3573 // Load address of array of frame sizes into rsi | |
304 | 3574 __ movptr(rsi, Address(rdi, Deoptimization::UnrollBlock::frame_sizes_offset_in_bytes())); |
0 | 3575 |
3576 // Load counter into rdx | |
3577 __ movl(rdx, Address(rdi, Deoptimization::UnrollBlock::number_of_frames_offset_in_bytes())); | |
3578 | |
3579 // Now adjust the caller's stack to make up for the extra locals | |
3580 // but record the original sp so that we can save it in the skeletal interpreter | |
3581 // frame and the stack walking of interpreter_sender will get the unextended sp | |
3582 // value and not the "real" sp value. | |
3583 | |
3584 const Register sender_sp = r8; | |
3585 | |
304 | 3586 __ mov(sender_sp, rsp); |
0 | 3587 __ movl(rbx, Address(rdi, |
3588 Deoptimization::UnrollBlock:: | |
3589 caller_adjustment_offset_in_bytes())); | |
304 | 3590 __ subptr(rsp, rbx); |
0 | 3591 |
3592 // Push interpreter frames in a loop | |
3593 Label loop; | |
3594 __ bind(loop); | |
304 | 3595 __ movptr(rbx, Address(rsi, 0)); // Load frame size |
3596 #ifdef CC_INTERP | |
3597 __ subptr(rbx, 4*wordSize); // we'll push pc and ebp by hand and | |
3598 #ifdef ASSERT | |
3599 __ push(0xDEADDEAD); // Make a recognizable pattern | |
3600 __ push(0xDEADDEAD); | |
3601 #else /* ASSERT */ | |
3602 __ subptr(rsp, 2*wordSize); // skip the "static long no_param" | |
3603 #endif /* ASSERT */ | |
3604 #else | |
3605 __ subptr(rbx, 2*wordSize); // We'll push pc and ebp by hand | |
3606 #endif // CC_INTERP | |
3607 __ pushptr(Address(rcx, 0)); // Save return address | |
0 | 3608 __ enter(); // Save old & set new ebp |
304 | 3609 __ subptr(rsp, rbx); // Prolog |
3610 #ifdef CC_INTERP | |
3611 __ movptr(Address(rbp, | |
3612 -(sizeof(BytecodeInterpreter)) + in_bytes(byte_offset_of(BytecodeInterpreter, _sender_sp))), | |
3613 sender_sp); // Make it walkable | |
3614 #else /* CC_INTERP */ | |
0 | 3615 // This value is corrected by layout_activation_impl |
304 | 3616 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD ); |
3617 __ movptr(Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize), sender_sp); // Make it walkable | |
3618 #endif /* CC_INTERP */ | |
3619 __ mov(sender_sp, rsp); // Pass sender_sp to next frame | |
3620 __ addptr(rsi, wordSize); // Bump array pointer (sizes) | |
3621 __ addptr(rcx, wordSize); // Bump array pointer (pcs) | |
0 | 3622 __ decrementl(rdx); // Decrement counter |
3623 __ jcc(Assembler::notZero, loop); | |
304 | 3624 __ pushptr(Address(rcx, 0)); // Save final return address |
0 | 3625 |
3626 // Re-push self-frame | |
3627 __ enter(); // Save old & set new ebp | |
3628 | |
3629 // Allocate a full sized register save area. | |
3630 // Return address and rbp are in place, so we allocate two less words. | |
304 | 3631 __ subptr(rsp, (frame_size_in_words - 2) * wordSize); |
0 | 3632 |
3633 // Restore frame locals after moving the frame | |
3634 __ movdbl(Address(rsp, RegisterSaver::xmm0_offset_in_bytes()), xmm0); | |
304 | 3635 __ movptr(Address(rsp, RegisterSaver::rax_offset_in_bytes()), rax); |
0 | 3636 |
3637 // Call C code. Need thread but NOT official VM entry | |
3638 // crud. We cannot block on this call, no GC can happen. Call should | |
3639 // restore return values to their stack-slots with the new SP. | |
3640 // | |
3641 // void Deoptimization::unpack_frames(JavaThread* thread, int exec_mode) | |
3642 | |
3643 // Use rbp because the frames look interpreted now | |
4057
1feb272af3a7
6636110: unaligned stackpointer leads to crash during deoptimization
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3931
diff
changeset
|
3644 // Save "the_pc" since it cannot easily be retrieved using the last_java_SP after we aligned SP. |
1feb272af3a7
6636110: unaligned stackpointer leads to crash during deoptimization
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parents:
3931
diff
changeset
|
3645 // Don't need the precise return PC here, just precise enough to point into this code blob. |
1feb272af3a7
6636110: unaligned stackpointer leads to crash during deoptimization
never
parents:
3931
diff
changeset
|
3646 address the_pc = __ pc(); |
1feb272af3a7
6636110: unaligned stackpointer leads to crash during deoptimization
never
parents:
3931
diff
changeset
|
3647 __ set_last_Java_frame(noreg, rbp, the_pc); |
1feb272af3a7
6636110: unaligned stackpointer leads to crash during deoptimization
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parents:
3931
diff
changeset
|
3648 |
1feb272af3a7
6636110: unaligned stackpointer leads to crash during deoptimization
never
parents:
3931
diff
changeset
|
3649 __ andptr(rsp, -(StackAlignmentInBytes)); // Fix stack alignment as required by ABI |
304 | 3650 __ mov(c_rarg0, r15_thread); |
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0
diff
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|
3651 __ movl(c_rarg1, r14); // second arg: exec_mode |
0 | 3652 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, Deoptimization::unpack_frames))); |
4057
1feb272af3a7
6636110: unaligned stackpointer leads to crash during deoptimization
never
parents:
3931
diff
changeset
|
3653 // Revert SP alignment after call since we're going to do some SP relative addressing below |
1feb272af3a7
6636110: unaligned stackpointer leads to crash during deoptimization
never
parents:
3931
diff
changeset
|
3654 __ movptr(rsp, Address(r15_thread, JavaThread::last_Java_sp_offset())); |
0 | 3655 |
3656 // Set an oopmap for the call site | |
4057
1feb272af3a7
6636110: unaligned stackpointer leads to crash during deoptimization
never
parents:
3931
diff
changeset
|
3657 // Use the same PC we used for the last java frame |
1feb272af3a7
6636110: unaligned stackpointer leads to crash during deoptimization
never
parents:
3931
diff
changeset
|
3658 oop_maps->add_gc_map(the_pc - start, |
0 | 3659 new OopMap( frame_size_in_words, 0 )); |
3660 | |
4057
1feb272af3a7
6636110: unaligned stackpointer leads to crash during deoptimization
never
parents:
3931
diff
changeset
|
3661 // Clear fp AND pc |
1feb272af3a7
6636110: unaligned stackpointer leads to crash during deoptimization
never
parents:
3931
diff
changeset
|
3662 __ reset_last_Java_frame(true, true); |
0 | 3663 |
3664 // Collect return values | |
3665 __ movdbl(xmm0, Address(rsp, RegisterSaver::xmm0_offset_in_bytes())); | |
304 | 3666 __ movptr(rax, Address(rsp, RegisterSaver::rax_offset_in_bytes())); |
3667 // I think this is useless (throwing pc?) | |
3668 __ movptr(rdx, Address(rsp, RegisterSaver::rdx_offset_in_bytes())); | |
0 | 3669 |
3670 // Pop self-frame. | |
3671 __ leave(); // Epilog | |
3672 | |
3673 // Jump to interpreter | |
3674 __ ret(0); | |
3675 | |
3676 // Make sure all code is generated | |
3677 masm->flush(); | |
3678 | |
304 | 3679 _deopt_blob = DeoptimizationBlob::create(&buffer, oop_maps, 0, exception_offset, reexecute_offset, frame_size_in_words); |
3680 _deopt_blob->set_unpack_with_exception_in_tls_offset(exception_in_tls_offset); | |
4985
0d2a2797a61f
2 more #ifdef GRAAL
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
4984
diff
changeset
|
3681 #ifdef GRAAL |
5111
422c979ff392
fixed two cases where DeoptAction was invalid
Christian Haeubl <christian.haeubl@oracle.com>
parents:
5109
diff
changeset
|
3682 _deopt_blob->set_implicit_exception_uncommon_trap_offset(implicit_exception_uncommon_trap_offset); |
4985
0d2a2797a61f
2 more #ifdef GRAAL
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
parents:
4984
diff
changeset
|
3683 #endif |
0 | 3684 } |
3685 | |
3686 #ifdef COMPILER2 | |
3687 //------------------------------generate_uncommon_trap_blob-------------------- | |
3688 void SharedRuntime::generate_uncommon_trap_blob() { | |
3689 // Allocate space for the code | |
3690 ResourceMark rm; | |
3691 // Setup code generation tools | |
3692 CodeBuffer buffer("uncommon_trap_blob", 2048, 1024); | |
3693 MacroAssembler* masm = new MacroAssembler(&buffer); | |
3694 | |
3695 assert(SimpleRuntimeFrame::framesize % 4 == 0, "sp not 16-byte aligned"); | |
3696 | |
3697 address start = __ pc(); | |
3698 | |
3699 // Push self-frame. We get here with a return address on the | |
3700 // stack, so rsp is 8-byte aligned until we allocate our frame. | |
304 | 3701 __ subptr(rsp, SimpleRuntimeFrame::return_off << LogBytesPerInt); // Epilog! |
0 | 3702 |
3703 // No callee saved registers. rbp is assumed implicitly saved | |
304 | 3704 __ movptr(Address(rsp, SimpleRuntimeFrame::rbp_off << LogBytesPerInt), rbp); |
0 | 3705 |
3706 // compiler left unloaded_class_index in j_rarg0 move to where the | |
3707 // runtime expects it. | |
3708 __ movl(c_rarg1, j_rarg0); | |
3709 | |
3710 __ set_last_Java_frame(noreg, noreg, NULL); | |
3711 | |
3712 // Call C code. Need thread but NOT official VM entry | |
3713 // crud. We cannot block on this call, no GC can happen. Call should | |
3714 // capture callee-saved registers as well as return values. | |
3715 // Thread is in rdi already. | |
3716 // | |
3717 // UnrollBlock* uncommon_trap(JavaThread* thread, jint unloaded_class_index); | |
3718 | |
304 | 3719 __ mov(c_rarg0, r15_thread); |
0 | 3720 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, Deoptimization::uncommon_trap))); |
3721 | |
3722 // Set an oopmap for the call site | |
3723 OopMapSet* oop_maps = new OopMapSet(); | |
3724 OopMap* map = new OopMap(SimpleRuntimeFrame::framesize, 0); | |
3725 | |
3726 // location of rbp is known implicitly by the frame sender code | |
3727 | |
3728 oop_maps->add_gc_map(__ pc() - start, map); | |
3729 | |
3730 __ reset_last_Java_frame(false, false); | |
3731 | |
3732 // Load UnrollBlock* into rdi | |
304 | 3733 __ mov(rdi, rax); |
0 | 3734 |
3735 // Pop all the frames we must move/replace. | |
3736 // | |
3737 // Frame picture (youngest to oldest) | |
3738 // 1: self-frame (no frame link) | |
3739 // 2: deopting frame (no frame link) | |
3740 // 3: caller of deopting frame (could be compiled/interpreted). | |
3741 | |
3742 // Pop self-frame. We have no frame, and must rely only on rax and rsp. | |
304 | 3743 __ addptr(rsp, (SimpleRuntimeFrame::framesize - 2) << LogBytesPerInt); // Epilog! |
0 | 3744 |
3745 // Pop deoptimized frame (int) | |
3746 __ movl(rcx, Address(rdi, | |
3747 Deoptimization::UnrollBlock:: | |
3748 size_of_deoptimized_frame_offset_in_bytes())); | |
304 | 3749 __ addptr(rsp, rcx); |
0 | 3750 |
3751 // rsp should be pointing at the return address to the caller (3) | |
3752 | |
13384
fca8f4799229
8028308: nsk regression, assert(obj->is_oop()) failed: not an oop
roland
parents:
10998
diff
changeset
|
3753 // Pick up the initial fp we should save |
fca8f4799229
8028308: nsk regression, assert(obj->is_oop()) failed: not an oop
roland
parents:
10998
diff
changeset
|
3754 // restore rbp before stack bang because if stack overflow is thrown it needs to be pushed (and preserved) |
fca8f4799229
8028308: nsk regression, assert(obj->is_oop()) failed: not an oop
roland
parents:
10998
diff
changeset
|
3755 __ movptr(rbp, Address(rdi, Deoptimization::UnrollBlock::initial_info_offset_in_bytes())); |
fca8f4799229
8028308: nsk regression, assert(obj->is_oop()) failed: not an oop
roland
parents:
10998
diff
changeset
|
3756 |
0 | 3757 // Stack bang to make sure there's enough room for these interpreter frames. |
3758 if (UseStackBanging) { | |
3759 __ movl(rbx, Address(rdi ,Deoptimization::UnrollBlock::total_frame_sizes_offset_in_bytes())); | |
3760 __ bang_stack_size(rbx, rcx); | |
3761 } | |
3762 | |
3763 // Load address of array of frame pcs into rcx (address*) | |
13384
fca8f4799229
8028308: nsk regression, assert(obj->is_oop()) failed: not an oop
roland
parents:
10998
diff
changeset
|
3764 __ movptr(rcx, Address(rdi, Deoptimization::UnrollBlock::frame_pcs_offset_in_bytes())); |
0 | 3765 |
3766 // Trash the return pc | |
304 | 3767 __ addptr(rsp, wordSize); |
0 | 3768 |
3769 // Load address of array of frame sizes into rsi (intptr_t*) | |
13384
fca8f4799229
8028308: nsk regression, assert(obj->is_oop()) failed: not an oop
roland
parents:
10998
diff
changeset
|
3770 __ movptr(rsi, Address(rdi, Deoptimization::UnrollBlock:: frame_sizes_offset_in_bytes())); |
0 | 3771 |
3772 // Counter | |
13384
fca8f4799229
8028308: nsk regression, assert(obj->is_oop()) failed: not an oop
roland
parents:
10998
diff
changeset
|
3773 __ movl(rdx, Address(rdi, Deoptimization::UnrollBlock:: number_of_frames_offset_in_bytes())); // (int) |
0 | 3774 |
3775 // Now adjust the caller's stack to make up for the extra locals but | |
3776 // record the original sp so that we can save it in the skeletal | |
3777 // interpreter frame and the stack walking of interpreter_sender | |
3778 // will get the unextended sp value and not the "real" sp value. | |
3779 | |
3780 const Register sender_sp = r8; | |
3781 | |
304 | 3782 __ mov(sender_sp, rsp); |
13384
fca8f4799229
8028308: nsk regression, assert(obj->is_oop()) failed: not an oop
roland
parents:
10998
diff
changeset
|
3783 __ movl(rbx, Address(rdi, Deoptimization::UnrollBlock:: caller_adjustment_offset_in_bytes())); // (int) |
304 | 3784 __ subptr(rsp, rbx); |
0 | 3785 |
3786 // Push interpreter frames in a loop | |
3787 Label loop; | |
3788 __ bind(loop); | |
304 | 3789 __ movptr(rbx, Address(rsi, 0)); // Load frame size |
3790 __ subptr(rbx, 2 * wordSize); // We'll push pc and rbp by hand | |
3791 __ pushptr(Address(rcx, 0)); // Save return address | |
3792 __ enter(); // Save old & set new rbp | |
3793 __ subptr(rsp, rbx); // Prolog | |
520
52a431267315
6791168: Fix invalid code in bytecodeInterpreter that can cause gcc ICE
coleenp
parents:
304
diff
changeset
|
3794 #ifdef CC_INTERP |
52a431267315
6791168: Fix invalid code in bytecodeInterpreter that can cause gcc ICE
coleenp
parents:
304
diff
changeset
|
3795 __ movptr(Address(rbp, |
52a431267315
6791168: Fix invalid code in bytecodeInterpreter that can cause gcc ICE
coleenp
parents:
304
diff
changeset
|
3796 -(sizeof(BytecodeInterpreter)) + in_bytes(byte_offset_of(BytecodeInterpreter, _sender_sp))), |
52a431267315
6791168: Fix invalid code in bytecodeInterpreter that can cause gcc ICE
coleenp
parents:
304
diff
changeset
|
3797 sender_sp); // Make it walkable |
52a431267315
6791168: Fix invalid code in bytecodeInterpreter that can cause gcc ICE
coleenp
parents:
304
diff
changeset
|
3798 #else // CC_INTERP |
304 | 3799 __ movptr(Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize), |
3800 sender_sp); // Make it walkable | |
0 | 3801 // This value is corrected by layout_activation_impl |
304 | 3802 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD ); |
520
52a431267315
6791168: Fix invalid code in bytecodeInterpreter that can cause gcc ICE
coleenp
parents:
304
diff
changeset
|
3803 #endif // CC_INTERP |
304 | 3804 __ mov(sender_sp, rsp); // Pass sender_sp to next frame |
3805 __ addptr(rsi, wordSize); // Bump array pointer (sizes) | |
3806 __ addptr(rcx, wordSize); // Bump array pointer (pcs) | |
3807 __ decrementl(rdx); // Decrement counter | |
0 | 3808 __ jcc(Assembler::notZero, loop); |
304 | 3809 __ pushptr(Address(rcx, 0)); // Save final return address |
0 | 3810 |
3811 // Re-push self-frame | |
3812 __ enter(); // Save old & set new rbp | |
304 | 3813 __ subptr(rsp, (SimpleRuntimeFrame::framesize - 4) << LogBytesPerInt); |
0 | 3814 // Prolog |
3815 | |
3816 // Use rbp because the frames look interpreted now | |
4057
1feb272af3a7
6636110: unaligned stackpointer leads to crash during deoptimization
never
parents:
3931
diff
changeset
|
3817 // Save "the_pc" since it cannot easily be retrieved using the last_java_SP after we aligned SP. |
1feb272af3a7
6636110: unaligned stackpointer leads to crash during deoptimization
never
parents:
3931
diff
changeset
|
3818 // Don't need the precise return PC here, just precise enough to point into this code blob. |
1feb272af3a7
6636110: unaligned stackpointer leads to crash during deoptimization
never
parents:
3931
diff
changeset
|
3819 address the_pc = __ pc(); |
1feb272af3a7
6636110: unaligned stackpointer leads to crash during deoptimization
never
parents:
3931
diff
changeset
|
3820 __ set_last_Java_frame(noreg, rbp, the_pc); |
0 | 3821 |
3822 // Call C code. Need thread but NOT official VM entry | |
3823 // crud. We cannot block on this call, no GC can happen. Call should | |
3824 // restore return values to their stack-slots with the new SP. | |
3825 // Thread is in rdi already. | |
3826 // | |
3827 // BasicType unpack_frames(JavaThread* thread, int exec_mode); | |
3828 | |
4057
1feb272af3a7
6636110: unaligned stackpointer leads to crash during deoptimization
never
parents:
3931
diff
changeset
|
3829 __ andptr(rsp, -(StackAlignmentInBytes)); // Align SP as required by ABI |
304 | 3830 __ mov(c_rarg0, r15_thread); |
0 | 3831 __ movl(c_rarg1, Deoptimization::Unpack_uncommon_trap); |
3832 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, Deoptimization::unpack_frames))); | |
3833 | |
3834 // Set an oopmap for the call site | |
4057
1feb272af3a7
6636110: unaligned stackpointer leads to crash during deoptimization
never
parents:
3931
diff
changeset
|
3835 // Use the same PC we used for the last java frame |
1feb272af3a7
6636110: unaligned stackpointer leads to crash during deoptimization
never
parents:
3931
diff
changeset
|
3836 oop_maps->add_gc_map(the_pc - start, new OopMap(SimpleRuntimeFrame::framesize, 0)); |
1feb272af3a7
6636110: unaligned stackpointer leads to crash during deoptimization
never
parents:
3931
diff
changeset
|
3837 |
1feb272af3a7
6636110: unaligned stackpointer leads to crash during deoptimization
never
parents:
3931
diff
changeset
|
3838 // Clear fp AND pc |
1feb272af3a7
6636110: unaligned stackpointer leads to crash during deoptimization
never
parents:
3931
diff
changeset
|
3839 __ reset_last_Java_frame(true, true); |
0 | 3840 |
3841 // Pop self-frame. | |
3842 __ leave(); // Epilog | |
3843 | |
3844 // Jump to interpreter | |
3845 __ ret(0); | |
3846 | |
3847 // Make sure all code is generated | |
3848 masm->flush(); | |
3849 | |
3850 _uncommon_trap_blob = UncommonTrapBlob::create(&buffer, oop_maps, | |
3851 SimpleRuntimeFrame::framesize >> 1); | |
3852 } | |
3853 #endif // COMPILER2 | |
3854 | |
3855 | |
3856 //------------------------------generate_handler_blob------ | |
3857 // | |
3858 // Generate a special Compile2Runtime blob that saves all registers, | |
3859 // and setup oopmap. | |
3860 // | |
6792
137868b7aa6f
7196199: java/text/Bidi/Bug6665028.java failed: Bidi run count incorrect
kvn
parents:
6790
diff
changeset
|
3861 SafepointBlob* SharedRuntime::generate_handler_blob(address call_ptr, int poll_type) { |
0 | 3862 assert(StubRoutines::forward_exception_entry() != NULL, |
3863 "must be generated before"); | |
3864 | |
3865 ResourceMark rm; | |
3866 OopMapSet *oop_maps = new OopMapSet(); | |
3867 OopMap* map; | |
3868 | |
3869 // Allocate space for the code. Setup code generation tools. | |
3870 CodeBuffer buffer("handler_blob", 2048, 1024); | |
3871 MacroAssembler* masm = new MacroAssembler(&buffer); | |
3872 | |
3873 address start = __ pc(); | |
3874 address call_pc = NULL; | |
3875 int frame_size_in_words; | |
6792
137868b7aa6f
7196199: java/text/Bidi/Bug6665028.java failed: Bidi run count incorrect
kvn
parents:
6790
diff
changeset
|
3876 bool cause_return = (poll_type == POLL_AT_RETURN); |
137868b7aa6f
7196199: java/text/Bidi/Bug6665028.java failed: Bidi run count incorrect
kvn
parents:
6790
diff
changeset
|
3877 bool save_vectors = (poll_type == POLL_AT_VECTOR_LOOP); |
0 | 3878 |
3879 // Make room for return address (or push it again) | |
3880 if (!cause_return) { | |
304 | 3881 __ push(rbx); |
0 | 3882 } |
3883 | |
3884 // Save registers, fpu state, and flags | |
6792
137868b7aa6f
7196199: java/text/Bidi/Bug6665028.java failed: Bidi run count incorrect
kvn
parents:
6790
diff
changeset
|
3885 map = RegisterSaver::save_live_registers(masm, 0, &frame_size_in_words, save_vectors); |
0 | 3886 |
3887 // The following is basically a call_VM. However, we need the precise | |
3888 // address of the call in order to generate an oopmap. Hence, we do all the | |
3889 // work outselves. | |
3890 | |
3891 __ set_last_Java_frame(noreg, noreg, NULL); | |
3892 | |
3893 // The return address must always be correct so that frame constructor never | |
3894 // sees an invalid pc. | |
3895 | |
3896 if (!cause_return) { | |
3897 // overwrite the dummy value we pushed on entry | |
304 | 3898 __ movptr(c_rarg0, Address(r15_thread, JavaThread::saved_exception_pc_offset())); |
3899 __ movptr(Address(rbp, wordSize), c_rarg0); | |
0 | 3900 } |
3901 | |
3902 // Do the call | |
304 | 3903 __ mov(c_rarg0, r15_thread); |
0 | 3904 __ call(RuntimeAddress(call_ptr)); |
3905 | |
3906 // Set an oopmap for the call site. This oopmap will map all | |
3907 // oop-registers and debug-info registers as callee-saved. This | |
3908 // will allow deoptimization at this safepoint to find all possible | |
3909 // debug-info recordings, as well as let GC find all oops. | |
3910 | |
3911 oop_maps->add_gc_map( __ pc() - start, map); | |
3912 | |
3913 Label noException; | |
3914 | |
3915 __ reset_last_Java_frame(false, false); | |
3916 | |
304 | 3917 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD); |
0 | 3918 __ jcc(Assembler::equal, noException); |
3919 | |
3920 // Exception pending | |
3921 | |
6792
137868b7aa6f
7196199: java/text/Bidi/Bug6665028.java failed: Bidi run count incorrect
kvn
parents:
6790
diff
changeset
|
3922 RegisterSaver::restore_live_registers(masm, save_vectors); |
0 | 3923 |
3924 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry())); | |
3925 | |
3926 // No exception case | |
3927 __ bind(noException); | |
3928 | |
3929 // Normal exit, restore registers and exit. | |
6792
137868b7aa6f
7196199: java/text/Bidi/Bug6665028.java failed: Bidi run count incorrect
kvn
parents:
6790
diff
changeset
|
3930 RegisterSaver::restore_live_registers(masm, save_vectors); |
0 | 3931 |
3932 __ ret(0); | |
3933 | |
3934 // Make sure all code is generated | |
3935 masm->flush(); | |
3936 | |
3937 // Fill-out other meta info | |
3938 return SafepointBlob::create(&buffer, oop_maps, frame_size_in_words); | |
3939 } | |
3940 | |
3941 // | |
3942 // generate_resolve_blob - call resolution (static/virtual/opt-virtual/ic-miss | |
3943 // | |
3944 // Generate a stub that calls into vm to find out the proper destination | |
3945 // of a java call. All the argument registers are live at this point | |
3946 // but since this is generic code we don't know what they are and the caller | |
3947 // must do any gc of the args. | |
3948 // | |
3442
f7d55ea6ee56
7045514: SPARC assembly code for JSR 292 ricochet frames
never
parents:
3363
diff
changeset
|
3949 RuntimeStub* SharedRuntime::generate_resolve_blob(address destination, const char* name) { |
0 | 3950 assert (StubRoutines::forward_exception_entry() != NULL, "must be generated before"); |
3951 | |
3952 // allocate space for the code | |
3953 ResourceMark rm; | |
3954 | |
3955 CodeBuffer buffer(name, 1000, 512); | |
3956 MacroAssembler* masm = new MacroAssembler(&buffer); | |
3957 | |
3958 int frame_size_in_words; | |
3959 | |
3960 OopMapSet *oop_maps = new OopMapSet(); | |
3961 OopMap* map = NULL; | |
3962 | |
3963 int start = __ offset(); | |
3964 | |
3965 map = RegisterSaver::save_live_registers(masm, 0, &frame_size_in_words); | |
3966 | |
3967 int frame_complete = __ offset(); | |
3968 | |
3969 __ set_last_Java_frame(noreg, noreg, NULL); | |
3970 | |
304 | 3971 __ mov(c_rarg0, r15_thread); |
0 | 3972 |
3973 __ call(RuntimeAddress(destination)); | |
3974 | |
3975 | |
3976 // Set an oopmap for the call site. | |
3977 // We need this not only for callee-saved registers, but also for volatile | |
3978 // registers that the compiler might be keeping live across a safepoint. | |
3979 | |
3980 oop_maps->add_gc_map( __ offset() - start, map); | |
3981 | |
3982 // rax contains the address we are going to jump to assuming no exception got installed | |
3983 | |
3984 // clear last_Java_sp | |
3985 __ reset_last_Java_frame(false, false); | |
3986 // check for pending exceptions | |
3987 Label pending; | |
304 | 3988 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD); |
0 | 3989 __ jcc(Assembler::notEqual, pending); |
3990 | |
6725
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
3991 // get the returned Method* |
da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
coleenp
parents:
6266
diff
changeset
|
3992 __ get_vm_result_2(rbx, r15_thread); |
304 | 3993 __ movptr(Address(rsp, RegisterSaver::rbx_offset_in_bytes()), rbx); |
3994 | |
3995 __ movptr(Address(rsp, RegisterSaver::rax_offset_in_bytes()), rax); | |
0 | 3996 |
3997 RegisterSaver::restore_live_registers(masm); | |
3998 | |
3999 // We are back the the original state on entry and ready to go. | |
4000 | |
4001 __ jmp(rax); | |
4002 | |
4003 // Pending exception after the safepoint | |
4004 | |
4005 __ bind(pending); | |
4006 | |
4007 RegisterSaver::restore_live_registers(masm); | |
4008 | |
4009 // exception pending => remove activation and forward to exception handler | |
4010 | |
4011 __ movptr(Address(r15_thread, JavaThread::vm_result_offset()), (int)NULL_WORD); | |
4012 | |
304 | 4013 __ movptr(rax, Address(r15_thread, Thread::pending_exception_offset())); |
0 | 4014 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry())); |
4015 | |
4016 // ------------- | |
4017 // make sure all code is generated | |
4018 masm->flush(); | |
4019 | |
4020 // return the blob | |
4021 // frame_size_words or bytes?? | |
4022 return RuntimeStub::new_runtime_stub(name, &buffer, frame_complete, frame_size_in_words, oop_maps, true); | |
4023 } | |
4024 | |
4025 | |
4026 #ifdef COMPILER2 | |
4027 // This is here instead of runtime_x86_64.cpp because it uses SimpleRuntimeFrame | |
4028 // | |
4029 //------------------------------generate_exception_blob--------------------------- | |
4030 // creates exception blob at the end | |
4031 // Using exception blob, this code is jumped from a compiled method. | |
4032 // (see emit_exception_handler in x86_64.ad file) | |
4033 // | |
4034 // Given an exception pc at a call we call into the runtime for the | |
4035 // handler in this method. This handler might merely restore state | |
4036 // (i.e. callee save registers) unwind the frame and jump to the | |
4037 // exception handler for the nmethod if there is no Java level handler | |
4038 // for the nmethod. | |
4039 // | |
4040 // This code is entered with a jmp. | |
4041 // | |
4042 // Arguments: | |
4043 // rax: exception oop | |
4044 // rdx: exception pc | |
4045 // | |
4046 // Results: | |
4047 // rax: exception oop | |
4048 // rdx: exception pc in caller or ??? | |
4049 // destination: exception handler of caller | |
4050 // | |
4051 // Note: the exception pc MUST be at a call (precise debug information) | |
4052 // Registers rax, rdx, rcx, rsi, rdi, r8-r11 are not callee saved. | |
4053 // | |
4054 | |
4055 void OptoRuntime::generate_exception_blob() { | |
4056 assert(!OptoRuntime::is_callee_saved_register(RDX_num), ""); | |
4057 assert(!OptoRuntime::is_callee_saved_register(RAX_num), ""); | |
4058 assert(!OptoRuntime::is_callee_saved_register(RCX_num), ""); | |
4059 | |
4060 assert(SimpleRuntimeFrame::framesize % 4 == 0, "sp not 16-byte aligned"); | |
4061 | |
4062 // Allocate space for the code | |
4063 ResourceMark rm; | |
4064 // Setup code generation tools | |
4065 CodeBuffer buffer("exception_blob", 2048, 1024); | |
4066 MacroAssembler* masm = new MacroAssembler(&buffer); | |
4067 | |
4068 | |
4069 address start = __ pc(); | |
4070 | |
4071 // Exception pc is 'return address' for stack walker | |
304 | 4072 __ push(rdx); |
4073 __ subptr(rsp, SimpleRuntimeFrame::return_off << LogBytesPerInt); // Prolog | |
0 | 4074 |
4075 // Save callee-saved registers. See x86_64.ad. | |
4076 | |
4077 // rbp is an implicitly saved callee saved register (i.e. the calling | |
4078 // convention will save restore it in prolog/epilog) Other than that | |
4079 // there are no callee save registers now that adapter frames are gone. | |
4080 | |
304 | 4081 __ movptr(Address(rsp, SimpleRuntimeFrame::rbp_off << LogBytesPerInt), rbp); |
0 | 4082 |
4083 // Store exception in Thread object. We cannot pass any arguments to the | |
4084 // handle_exception call, since we do not want to make any assumption | |
4085 // about the size of the frame where the exception happened in. | |
4086 // c_rarg0 is either rdi (Linux) or rcx (Windows). | |
304 | 4087 __ movptr(Address(r15_thread, JavaThread::exception_oop_offset()),rax); |
4088 __ movptr(Address(r15_thread, JavaThread::exception_pc_offset()), rdx); | |
0 | 4089 |
4090 // This call does all the hard work. It checks if an exception handler | |
4091 // exists in the method. | |
4092 // If so, it returns the handler address. | |
4093 // If not, it prepares for stack-unwinding, restoring the callee-save | |
4094 // registers of the frame being removed. | |
4095 // | |
4096 // address OptoRuntime::handle_exception_C(JavaThread* thread) | |
4097 | |
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4098 // At a method handle call, the stack may not be properly aligned |
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4099 // when returning with an exception. |
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4100 address the_pc = __ pc(); |
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4101 __ set_last_Java_frame(noreg, noreg, the_pc); |
304 | 4102 __ mov(c_rarg0, r15_thread); |
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4103 __ andptr(rsp, -(StackAlignmentInBytes)); // Align stack |
0 | 4104 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, OptoRuntime::handle_exception_C))); |
4105 | |
4106 // Set an oopmap for the call site. This oopmap will only be used if we | |
4107 // are unwinding the stack. Hence, all locations will be dead. | |
4108 // Callee-saved registers will be the same as the frame above (i.e., | |
4109 // handle_exception_stub), since they were restored when we got the | |
4110 // exception. | |
4111 | |
4112 OopMapSet* oop_maps = new OopMapSet(); | |
4113 | |
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4114 oop_maps->add_gc_map(the_pc - start, new OopMap(SimpleRuntimeFrame::framesize, 0)); |
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4115 |
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4116 __ reset_last_Java_frame(false, true); |
0 | 4117 |
4118 // Restore callee-saved registers | |
4119 | |
4120 // rbp is an implicitly saved callee saved register (i.e. the calling | |
4121 // convention will save restore it in prolog/epilog) Other than that | |
4122 // there are no callee save registers no that adapter frames are gone. | |
4123 | |
304 | 4124 __ movptr(rbp, Address(rsp, SimpleRuntimeFrame::rbp_off << LogBytesPerInt)); |
4125 | |
4126 __ addptr(rsp, SimpleRuntimeFrame::return_off << LogBytesPerInt); // Epilog | |
4127 __ pop(rdx); // No need for exception pc anymore | |
0 | 4128 |
4129 // rax: exception handler | |
4130 | |
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4131 // Restore SP from BP if the exception PC is a MethodHandle call site. |
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4132 __ cmpl(Address(r15_thread, JavaThread::is_method_handle_return_offset()), 0); |
1567 | 4133 __ cmovptr(Assembler::notEqual, rsp, rbp_mh_SP_save); |
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4134 |
0 | 4135 // We have a handler in rax (could be deopt blob). |
304 | 4136 __ mov(r8, rax); |
0 | 4137 |
4138 // Get the exception oop | |
304 | 4139 __ movptr(rax, Address(r15_thread, JavaThread::exception_oop_offset())); |
0 | 4140 // Get the exception pc in case we are deoptimized |
304 | 4141 __ movptr(rdx, Address(r15_thread, JavaThread::exception_pc_offset())); |
0 | 4142 #ifdef ASSERT |
4143 __ movptr(Address(r15_thread, JavaThread::exception_handler_pc_offset()), (int)NULL_WORD); | |
4144 __ movptr(Address(r15_thread, JavaThread::exception_pc_offset()), (int)NULL_WORD); | |
4145 #endif | |
4146 // Clear the exception oop so GC no longer processes it as a root. | |
4147 __ movptr(Address(r15_thread, JavaThread::exception_oop_offset()), (int)NULL_WORD); | |
4148 | |
4149 // rax: exception oop | |
4150 // r8: exception handler | |
4151 // rdx: exception pc | |
4152 // Jump to handler | |
4153 | |
4154 __ jmp(r8); | |
4155 | |
4156 // Make sure all code is generated | |
4157 masm->flush(); | |
4158 | |
4159 // Set exception blob | |
4160 _exception_blob = ExceptionBlob::create(&buffer, oop_maps, SimpleRuntimeFrame::framesize >> 1); | |
4161 } | |
4162 #endif // COMPILER2 |