Mercurial > hg > truffle
annotate src/cpu/x86/vm/sharedRuntime_x86_64.cpp @ 8654:3bbad4ec6510
new phase: PushNodesThroughPi
author | Bernhard Urban <bernhard.urban@jku.at> |
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date | Thu, 04 Apr 2013 16:03:08 +0200 |
parents | 25691fcb505a |
children | b9a918201d47 |
rev | line source |
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0 | 1 /* |
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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 | |
0 | 43 |
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44 #define __ masm-> |
0 | 45 |
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46 const int StackAlignmentInSlots = StackAlignmentInBytes / VMRegImpl::stack_slot_size; |
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47 |
0 | 48 class SimpleRuntimeFrame { |
49 | |
50 public: | |
51 | |
52 // Most of the runtime stubs have this simple frame layout. | |
53 // This class exists to make the layout shared in one place. | |
54 // Offsets are for compiler stack slots, which are jints. | |
55 enum layout { | |
56 // The frame sender code expects that rbp will be in the "natural" place and | |
57 // will override any oopMap setting for it. We must therefore force the layout | |
58 // so that it agrees with the frame sender code. | |
59 rbp_off = frame::arg_reg_save_area_bytes/BytesPerInt, | |
60 rbp_off2, | |
61 return_off, return_off2, | |
62 framesize | |
63 }; | |
64 }; | |
65 | |
66 class RegisterSaver { | |
67 // Capture info about frame layout. Layout offsets are in jint | |
68 // units because compiler frame slots are jints. | |
69 #define DEF_XMM_OFFS(regnum) xmm ## regnum ## _off = xmm_off + (regnum)*16/BytesPerInt, xmm ## regnum ## H_off | |
70 enum layout { | |
71 fpu_state_off = frame::arg_reg_save_area_bytes/BytesPerInt, // fxsave save area | |
72 xmm_off = fpu_state_off + 160/BytesPerInt, // offset in fxsave save area | |
73 DEF_XMM_OFFS(0), | |
74 DEF_XMM_OFFS(1), | |
75 DEF_XMM_OFFS(2), | |
76 DEF_XMM_OFFS(3), | |
77 DEF_XMM_OFFS(4), | |
78 DEF_XMM_OFFS(5), | |
79 DEF_XMM_OFFS(6), | |
80 DEF_XMM_OFFS(7), | |
81 DEF_XMM_OFFS(8), | |
82 DEF_XMM_OFFS(9), | |
83 DEF_XMM_OFFS(10), | |
84 DEF_XMM_OFFS(11), | |
85 DEF_XMM_OFFS(12), | |
86 DEF_XMM_OFFS(13), | |
87 DEF_XMM_OFFS(14), | |
88 DEF_XMM_OFFS(15), | |
89 fpu_state_end = fpu_state_off + ((FPUStateSizeInWords-1)*wordSize / BytesPerInt), | |
90 fpu_stateH_end, | |
91 r15_off, r15H_off, | |
92 r14_off, r14H_off, | |
93 r13_off, r13H_off, | |
94 r12_off, r12H_off, | |
95 r11_off, r11H_off, | |
96 r10_off, r10H_off, | |
97 r9_off, r9H_off, | |
98 r8_off, r8H_off, | |
99 rdi_off, rdiH_off, | |
100 rsi_off, rsiH_off, | |
101 ignore_off, ignoreH_off, // extra copy of rbp | |
102 rsp_off, rspH_off, | |
103 rbx_off, rbxH_off, | |
104 rdx_off, rdxH_off, | |
105 rcx_off, rcxH_off, | |
106 rax_off, raxH_off, | |
107 // 16-byte stack alignment fill word: see MacroAssembler::push/pop_IU_state | |
108 align_off, alignH_off, | |
109 flags_off, flagsH_off, | |
110 // The frame sender code expects that rbp will be in the "natural" place and | |
111 // will override any oopMap setting for it. We must therefore force the layout | |
112 // so that it agrees with the frame sender code. | |
113 rbp_off, rbpH_off, // copy of rbp we will restore | |
114 return_off, returnH_off, // slot for return address | |
115 reg_save_size // size in compiler stack slots | |
116 }; | |
117 | |
118 public: | |
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119 static OopMap* save_live_registers(MacroAssembler* masm, int additional_frame_words, int* total_frame_words, bool save_vectors = false); |
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120 static void restore_live_registers(MacroAssembler* masm, bool restore_vectors = false); |
0 | 121 |
122 // Offsets into the register save area | |
123 // Used by deoptimization when it is managing result register | |
124 // values on its own | |
125 | |
126 static int rax_offset_in_bytes(void) { return BytesPerInt * rax_off; } | |
304 | 127 static int rdx_offset_in_bytes(void) { return BytesPerInt * rdx_off; } |
0 | 128 static int rbx_offset_in_bytes(void) { return BytesPerInt * rbx_off; } |
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129 static int r10_offset_in_bytes(void) { return BytesPerInt * r10_off; } |
0 | 130 static int xmm0_offset_in_bytes(void) { return BytesPerInt * xmm0_off; } |
131 static int return_offset_in_bytes(void) { return BytesPerInt * return_off; } | |
132 | |
133 // During deoptimization only the result registers need to be restored, | |
134 // all the other values have already been extracted. | |
135 static void restore_result_registers(MacroAssembler* masm); | |
136 }; | |
137 | |
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138 OopMap* RegisterSaver::save_live_registers(MacroAssembler* masm, int additional_frame_words, int* total_frame_words, bool save_vectors) { |
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139 int vect_words = 0; |
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140 #ifdef COMPILER2 |
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141 if (save_vectors) { |
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142 assert(UseAVX > 0, "256bit vectors are supported only with AVX"); |
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143 assert(MaxVectorSize == 32, "only 256bit vectors are supported now"); |
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144 // Save upper half of YMM registes |
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145 vect_words = 16 * 16 / wordSize; |
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146 additional_frame_words += vect_words; |
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147 } |
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148 #else |
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149 assert(!save_vectors, "vectors are generated only by C2"); |
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150 #endif |
0 | 151 |
152 // Always make the frame size 16-byte aligned | |
153 int frame_size_in_bytes = round_to(additional_frame_words*wordSize + | |
154 reg_save_size*BytesPerInt, 16); | |
155 // OopMap frame size is in compiler stack slots (jint's) not bytes or words | |
156 int frame_size_in_slots = frame_size_in_bytes / BytesPerInt; | |
157 // The caller will allocate additional_frame_words | |
158 int additional_frame_slots = additional_frame_words*wordSize / BytesPerInt; | |
159 // CodeBlob frame size is in words. | |
160 int frame_size_in_words = frame_size_in_bytes / wordSize; | |
161 *total_frame_words = frame_size_in_words; | |
162 | |
163 // Save registers, fpu state, and flags. | |
164 // We assume caller has already pushed the return address onto the | |
165 // stack, so rsp is 8-byte aligned here. | |
166 // We push rpb twice in this sequence because we want the real rbp | |
167 // to be under the return like a normal enter. | |
168 | |
169 __ enter(); // rsp becomes 16-byte aligned here | |
170 __ push_CPU_state(); // Push a multiple of 16 bytes | |
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171 |
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172 if (vect_words > 0) { |
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173 assert(vect_words*wordSize == 256, ""); |
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174 __ subptr(rsp, 256); // Save upper half of YMM registes |
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175 __ vextractf128h(Address(rsp, 0),xmm0); |
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176 __ vextractf128h(Address(rsp, 16),xmm1); |
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177 __ vextractf128h(Address(rsp, 32),xmm2); |
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178 __ vextractf128h(Address(rsp, 48),xmm3); |
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179 __ vextractf128h(Address(rsp, 64),xmm4); |
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180 __ vextractf128h(Address(rsp, 80),xmm5); |
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181 __ vextractf128h(Address(rsp, 96),xmm6); |
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182 __ vextractf128h(Address(rsp,112),xmm7); |
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183 __ vextractf128h(Address(rsp,128),xmm8); |
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184 __ vextractf128h(Address(rsp,144),xmm9); |
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185 __ vextractf128h(Address(rsp,160),xmm10); |
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186 __ vextractf128h(Address(rsp,176),xmm11); |
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187 __ vextractf128h(Address(rsp,192),xmm12); |
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188 __ vextractf128h(Address(rsp,208),xmm13); |
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189 __ vextractf128h(Address(rsp,224),xmm14); |
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190 __ vextractf128h(Address(rsp,240),xmm15); |
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191 } |
0 | 192 if (frame::arg_reg_save_area_bytes != 0) { |
193 // Allocate argument register save area | |
304 | 194 __ subptr(rsp, frame::arg_reg_save_area_bytes); |
0 | 195 } |
196 | |
197 // Set an oopmap for the call site. This oopmap will map all | |
198 // oop-registers and debug-info registers as callee-saved. This | |
199 // will allow deoptimization at this safepoint to find all possible | |
200 // debug-info recordings, as well as let GC find all oops. | |
201 | |
202 OopMapSet *oop_maps = new OopMapSet(); | |
203 OopMap* map = new OopMap(frame_size_in_slots, 0); | |
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204 |
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205 #define STACK_OFFSET(x) VMRegImpl::stack2reg((x) + additional_frame_slots) |
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206 |
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207 map->set_callee_saved(STACK_OFFSET( rax_off ), rax->as_VMReg()); |
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208 map->set_callee_saved(STACK_OFFSET( rcx_off ), rcx->as_VMReg()); |
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209 map->set_callee_saved(STACK_OFFSET( rdx_off ), rdx->as_VMReg()); |
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210 map->set_callee_saved(STACK_OFFSET( rbx_off ), rbx->as_VMReg()); |
0 | 211 // rbp location is known implicitly by the frame sender code, needs no oopmap |
212 // and the location where rbp was saved by is ignored | |
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213 map->set_callee_saved(STACK_OFFSET( rsi_off ), rsi->as_VMReg()); |
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214 map->set_callee_saved(STACK_OFFSET( rdi_off ), rdi->as_VMReg()); |
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215 map->set_callee_saved(STACK_OFFSET( r8_off ), r8->as_VMReg()); |
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216 map->set_callee_saved(STACK_OFFSET( r9_off ), r9->as_VMReg()); |
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217 map->set_callee_saved(STACK_OFFSET( r10_off ), r10->as_VMReg()); |
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218 map->set_callee_saved(STACK_OFFSET( r11_off ), r11->as_VMReg()); |
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219 map->set_callee_saved(STACK_OFFSET( r12_off ), r12->as_VMReg()); |
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220 map->set_callee_saved(STACK_OFFSET( r13_off ), r13->as_VMReg()); |
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221 map->set_callee_saved(STACK_OFFSET( r14_off ), r14->as_VMReg()); |
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222 map->set_callee_saved(STACK_OFFSET( r15_off ), r15->as_VMReg()); |
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223 map->set_callee_saved(STACK_OFFSET(xmm0_off ), xmm0->as_VMReg()); |
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224 map->set_callee_saved(STACK_OFFSET(xmm1_off ), xmm1->as_VMReg()); |
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225 map->set_callee_saved(STACK_OFFSET(xmm2_off ), xmm2->as_VMReg()); |
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226 map->set_callee_saved(STACK_OFFSET(xmm3_off ), xmm3->as_VMReg()); |
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227 map->set_callee_saved(STACK_OFFSET(xmm4_off ), xmm4->as_VMReg()); |
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228 map->set_callee_saved(STACK_OFFSET(xmm5_off ), xmm5->as_VMReg()); |
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229 map->set_callee_saved(STACK_OFFSET(xmm6_off ), xmm6->as_VMReg()); |
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230 map->set_callee_saved(STACK_OFFSET(xmm7_off ), xmm7->as_VMReg()); |
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231 map->set_callee_saved(STACK_OFFSET(xmm8_off ), xmm8->as_VMReg()); |
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232 map->set_callee_saved(STACK_OFFSET(xmm9_off ), xmm9->as_VMReg()); |
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233 map->set_callee_saved(STACK_OFFSET(xmm10_off), xmm10->as_VMReg()); |
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234 map->set_callee_saved(STACK_OFFSET(xmm11_off), xmm11->as_VMReg()); |
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235 map->set_callee_saved(STACK_OFFSET(xmm12_off), xmm12->as_VMReg()); |
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236 map->set_callee_saved(STACK_OFFSET(xmm13_off), xmm13->as_VMReg()); |
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237 map->set_callee_saved(STACK_OFFSET(xmm14_off), xmm14->as_VMReg()); |
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238 map->set_callee_saved(STACK_OFFSET(xmm15_off), xmm15->as_VMReg()); |
0 | 239 |
240 // %%% These should all be a waste but we'll keep things as they were for now | |
241 if (true) { | |
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242 map->set_callee_saved(STACK_OFFSET( raxH_off ), rax->as_VMReg()->next()); |
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243 map->set_callee_saved(STACK_OFFSET( rcxH_off ), rcx->as_VMReg()->next()); |
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244 map->set_callee_saved(STACK_OFFSET( rdxH_off ), rdx->as_VMReg()->next()); |
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245 map->set_callee_saved(STACK_OFFSET( rbxH_off ), rbx->as_VMReg()->next()); |
0 | 246 // rbp location is known implicitly by the frame sender code, needs no oopmap |
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247 map->set_callee_saved(STACK_OFFSET( rsiH_off ), rsi->as_VMReg()->next()); |
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248 map->set_callee_saved(STACK_OFFSET( rdiH_off ), rdi->as_VMReg()->next()); |
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249 map->set_callee_saved(STACK_OFFSET( r8H_off ), r8->as_VMReg()->next()); |
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250 map->set_callee_saved(STACK_OFFSET( r9H_off ), r9->as_VMReg()->next()); |
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251 map->set_callee_saved(STACK_OFFSET( r10H_off ), r10->as_VMReg()->next()); |
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252 map->set_callee_saved(STACK_OFFSET( r11H_off ), r11->as_VMReg()->next()); |
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253 map->set_callee_saved(STACK_OFFSET( r12H_off ), r12->as_VMReg()->next()); |
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254 map->set_callee_saved(STACK_OFFSET( r13H_off ), r13->as_VMReg()->next()); |
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255 map->set_callee_saved(STACK_OFFSET( r14H_off ), r14->as_VMReg()->next()); |
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256 map->set_callee_saved(STACK_OFFSET( r15H_off ), r15->as_VMReg()->next()); |
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257 map->set_callee_saved(STACK_OFFSET(xmm0H_off ), xmm0->as_VMReg()->next()); |
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258 map->set_callee_saved(STACK_OFFSET(xmm1H_off ), xmm1->as_VMReg()->next()); |
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259 map->set_callee_saved(STACK_OFFSET(xmm2H_off ), xmm2->as_VMReg()->next()); |
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260 map->set_callee_saved(STACK_OFFSET(xmm3H_off ), xmm3->as_VMReg()->next()); |
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261 map->set_callee_saved(STACK_OFFSET(xmm4H_off ), xmm4->as_VMReg()->next()); |
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262 map->set_callee_saved(STACK_OFFSET(xmm5H_off ), xmm5->as_VMReg()->next()); |
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263 map->set_callee_saved(STACK_OFFSET(xmm6H_off ), xmm6->as_VMReg()->next()); |
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264 map->set_callee_saved(STACK_OFFSET(xmm7H_off ), xmm7->as_VMReg()->next()); |
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265 map->set_callee_saved(STACK_OFFSET(xmm8H_off ), xmm8->as_VMReg()->next()); |
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266 map->set_callee_saved(STACK_OFFSET(xmm9H_off ), xmm9->as_VMReg()->next()); |
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267 map->set_callee_saved(STACK_OFFSET(xmm10H_off), xmm10->as_VMReg()->next()); |
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268 map->set_callee_saved(STACK_OFFSET(xmm11H_off), xmm11->as_VMReg()->next()); |
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269 map->set_callee_saved(STACK_OFFSET(xmm12H_off), xmm12->as_VMReg()->next()); |
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270 map->set_callee_saved(STACK_OFFSET(xmm13H_off), xmm13->as_VMReg()->next()); |
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271 map->set_callee_saved(STACK_OFFSET(xmm14H_off), xmm14->as_VMReg()->next()); |
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272 map->set_callee_saved(STACK_OFFSET(xmm15H_off), xmm15->as_VMReg()->next()); |
0 | 273 } |
274 | |
275 return map; | |
276 } | |
277 | |
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278 void RegisterSaver::restore_live_registers(MacroAssembler* masm, bool restore_vectors) { |
0 | 279 if (frame::arg_reg_save_area_bytes != 0) { |
280 // Pop arg register save area | |
304 | 281 __ addptr(rsp, frame::arg_reg_save_area_bytes); |
0 | 282 } |
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283 #ifdef COMPILER2 |
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284 if (restore_vectors) { |
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285 // Restore upper half of YMM registes. |
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286 assert(UseAVX > 0, "256bit vectors are supported only with AVX"); |
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287 assert(MaxVectorSize == 32, "only 256bit vectors are supported now"); |
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288 __ vinsertf128h(xmm0, Address(rsp, 0)); |
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289 __ vinsertf128h(xmm1, Address(rsp, 16)); |
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290 __ vinsertf128h(xmm2, Address(rsp, 32)); |
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291 __ vinsertf128h(xmm3, Address(rsp, 48)); |
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292 __ vinsertf128h(xmm4, Address(rsp, 64)); |
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293 __ vinsertf128h(xmm5, Address(rsp, 80)); |
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294 __ vinsertf128h(xmm6, Address(rsp, 96)); |
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295 __ vinsertf128h(xmm7, Address(rsp,112)); |
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296 __ vinsertf128h(xmm8, Address(rsp,128)); |
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297 __ vinsertf128h(xmm9, Address(rsp,144)); |
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298 __ vinsertf128h(xmm10, Address(rsp,160)); |
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299 __ vinsertf128h(xmm11, Address(rsp,176)); |
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300 __ vinsertf128h(xmm12, Address(rsp,192)); |
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301 __ vinsertf128h(xmm13, Address(rsp,208)); |
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302 __ vinsertf128h(xmm14, Address(rsp,224)); |
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303 __ vinsertf128h(xmm15, Address(rsp,240)); |
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304 __ addptr(rsp, 256); |
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305 } |
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306 #else |
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307 assert(!restore_vectors, "vectors are generated only by C2"); |
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308 #endif |
0 | 309 // Recover CPU state |
310 __ pop_CPU_state(); | |
311 // Get the rbp described implicitly by the calling convention (no oopMap) | |
304 | 312 __ pop(rbp); |
0 | 313 } |
314 | |
315 void RegisterSaver::restore_result_registers(MacroAssembler* masm) { | |
316 | |
317 // Just restore result register. Only used by deoptimization. By | |
318 // now any callee save register that needs to be restored to a c2 | |
319 // caller of the deoptee has been extracted into the vframeArray | |
320 // and will be stuffed into the c2i adapter we create for later | |
321 // restoration so only result registers need to be restored here. | |
322 | |
323 // Restore fp result register | |
324 __ movdbl(xmm0, Address(rsp, xmm0_offset_in_bytes())); | |
325 // Restore integer result register | |
304 | 326 __ movptr(rax, Address(rsp, rax_offset_in_bytes())); |
327 __ movptr(rdx, Address(rsp, rdx_offset_in_bytes())); | |
328 | |
0 | 329 // Pop all of the register save are off the stack except the return address |
304 | 330 __ addptr(rsp, return_offset_in_bytes()); |
0 | 331 } |
332 | |
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333 // Is vector's size (in bytes) bigger than a size saved by default? |
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334 // 16 bytes XMM registers are saved by default using fxsave/fxrstor instructions. |
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335 bool SharedRuntime::is_wide_vector(int size) { |
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336 return size > 16; |
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337 } |
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338 |
0 | 339 // The java_calling_convention describes stack locations as ideal slots on |
340 // a frame with no abi restrictions. Since we must observe abi restrictions | |
341 // (like the placement of the register window) the slots must be biased by | |
342 // the following value. | |
343 static int reg2offset_in(VMReg r) { | |
344 // Account for saved rbp and return address | |
345 // This should really be in_preserve_stack_slots | |
346 return (r->reg2stack() + 4) * VMRegImpl::stack_slot_size; | |
347 } | |
348 | |
349 static int reg2offset_out(VMReg r) { | |
350 return (r->reg2stack() + SharedRuntime::out_preserve_stack_slots()) * VMRegImpl::stack_slot_size; | |
351 } | |
352 | |
353 // --------------------------------------------------------------------------- | |
354 // Read the array of BasicTypes from a signature, and compute where the | |
355 // arguments should go. Values in the VMRegPair regs array refer to 4-byte | |
356 // quantities. Values less than VMRegImpl::stack0 are registers, those above | |
357 // refer to 4-byte stack slots. All stack slots are based off of the stack pointer | |
358 // as framesizes are fixed. | |
359 // VMRegImpl::stack0 refers to the first slot 0(sp). | |
360 // and VMRegImpl::stack0+1 refers to the memory word 4-byes higher. Register | |
361 // up to RegisterImpl::number_of_registers) are the 64-bit | |
362 // integer registers. | |
363 | |
364 // Note: the INPUTS in sig_bt are in units of Java argument words, which are | |
365 // either 32-bit or 64-bit depending on the build. The OUTPUTS are in 32-bit | |
366 // units regardless of build. Of course for i486 there is no 64 bit build | |
367 | |
368 // The Java calling convention is a "shifted" version of the C ABI. | |
369 // By skipping the first C ABI register we can call non-static jni methods | |
370 // with small numbers of arguments without having to shuffle the arguments | |
371 // at all. Since we control the java ABI we ought to at least get some | |
372 // advantage out of it. | |
373 | |
374 int SharedRuntime::java_calling_convention(const BasicType *sig_bt, | |
375 VMRegPair *regs, | |
376 int total_args_passed, | |
377 int is_outgoing) { | |
378 | |
379 // Create the mapping between argument positions and | |
380 // registers. | |
381 static const Register INT_ArgReg[Argument::n_int_register_parameters_j] = { | |
382 j_rarg0, j_rarg1, j_rarg2, j_rarg3, j_rarg4, j_rarg5 | |
383 }; | |
384 static const XMMRegister FP_ArgReg[Argument::n_float_register_parameters_j] = { | |
385 j_farg0, j_farg1, j_farg2, j_farg3, | |
386 j_farg4, j_farg5, j_farg6, j_farg7 | |
387 }; | |
388 | |
389 | |
390 uint int_args = 0; | |
391 uint fp_args = 0; | |
392 uint stk_args = 0; // inc by 2 each time | |
393 | |
394 for (int i = 0; i < total_args_passed; i++) { | |
395 switch (sig_bt[i]) { | |
396 case T_BOOLEAN: | |
397 case T_CHAR: | |
398 case T_BYTE: | |
399 case T_SHORT: | |
400 case T_INT: | |
401 if (int_args < Argument::n_int_register_parameters_j) { | |
402 regs[i].set1(INT_ArgReg[int_args++]->as_VMReg()); | |
403 } else { | |
404 regs[i].set1(VMRegImpl::stack2reg(stk_args)); | |
405 stk_args += 2; | |
406 } | |
407 break; | |
408 case T_VOID: | |
409 // halves of T_LONG or T_DOUBLE | |
410 assert(i != 0 && (sig_bt[i - 1] == T_LONG || sig_bt[i - 1] == T_DOUBLE), "expecting half"); | |
411 regs[i].set_bad(); | |
412 break; | |
413 case T_LONG: | |
414 assert(sig_bt[i + 1] == T_VOID, "expecting half"); | |
415 // fall through | |
416 case T_OBJECT: | |
417 case T_ARRAY: | |
418 case T_ADDRESS: | |
419 if (int_args < Argument::n_int_register_parameters_j) { | |
420 regs[i].set2(INT_ArgReg[int_args++]->as_VMReg()); | |
421 } else { | |
422 regs[i].set2(VMRegImpl::stack2reg(stk_args)); | |
423 stk_args += 2; | |
424 } | |
425 break; | |
426 case T_FLOAT: | |
427 if (fp_args < Argument::n_float_register_parameters_j) { | |
428 regs[i].set1(FP_ArgReg[fp_args++]->as_VMReg()); | |
429 } else { | |
430 regs[i].set1(VMRegImpl::stack2reg(stk_args)); | |
431 stk_args += 2; | |
432 } | |
433 break; | |
434 case T_DOUBLE: | |
435 assert(sig_bt[i + 1] == T_VOID, "expecting half"); | |
436 if (fp_args < Argument::n_float_register_parameters_j) { | |
437 regs[i].set2(FP_ArgReg[fp_args++]->as_VMReg()); | |
438 } else { | |
439 regs[i].set2(VMRegImpl::stack2reg(stk_args)); | |
440 stk_args += 2; | |
441 } | |
442 break; | |
443 default: | |
444 ShouldNotReachHere(); | |
445 break; | |
446 } | |
447 } | |
448 | |
449 return round_to(stk_args, 2); | |
450 } | |
451 | |
452 // Patch the callers callsite with entry to compiled code if it exists. | |
453 static void patch_callers_callsite(MacroAssembler *masm) { | |
454 Label L; | |
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455 __ cmpptr(Address(rbx, in_bytes(Method::code_offset())), (int32_t)NULL_WORD); |
0 | 456 __ jcc(Assembler::equal, L); |
457 | |
458 // Save the current stack pointer | |
304 | 459 __ mov(r13, rsp); |
0 | 460 // Schedule the branch target address early. |
461 // Call into the VM to patch the caller, then jump to compiled callee | |
462 // rax isn't live so capture return address while we easily can | |
304 | 463 __ movptr(rax, Address(rsp, 0)); |
0 | 464 |
465 // align stack so push_CPU_state doesn't fault | |
304 | 466 __ andptr(rsp, -(StackAlignmentInBytes)); |
0 | 467 __ push_CPU_state(); |
468 | |
469 // VM needs caller's callsite | |
470 // VM needs target method | |
471 // This needs to be a long call since we will relocate this adapter to | |
472 // the codeBuffer and it may not reach | |
473 | |
474 // Allocate argument register save area | |
475 if (frame::arg_reg_save_area_bytes != 0) { | |
304 | 476 __ subptr(rsp, frame::arg_reg_save_area_bytes); |
0 | 477 } |
304 | 478 __ mov(c_rarg0, rbx); |
479 __ mov(c_rarg1, rax); | |
0 | 480 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::fixup_callers_callsite))); |
481 | |
482 // De-allocate argument register save area | |
483 if (frame::arg_reg_save_area_bytes != 0) { | |
304 | 484 __ addptr(rsp, frame::arg_reg_save_area_bytes); |
0 | 485 } |
486 | |
487 __ pop_CPU_state(); | |
488 // restore sp | |
304 | 489 __ mov(rsp, r13); |
0 | 490 __ bind(L); |
491 } | |
492 | |
493 | |
494 static void gen_c2i_adapter(MacroAssembler *masm, | |
495 int total_args_passed, | |
496 int comp_args_on_stack, | |
497 const BasicType *sig_bt, | |
498 const VMRegPair *regs, | |
499 Label& skip_fixup) { | |
500 // Before we get into the guts of the C2I adapter, see if we should be here | |
501 // at all. We've come from compiled code and are attempting to jump to the | |
502 // interpreter, which means the caller made a static call to get here | |
503 // (vcalls always get a compiled target if there is one). Check for a | |
504 // compiled target. If there is one, we need to patch the caller's call. | |
505 patch_callers_callsite(masm); | |
506 | |
507 __ bind(skip_fixup); | |
508 | |
509 // Since all args are passed on the stack, total_args_passed * | |
510 // Interpreter::stackElementSize is the space we need. Plus 1 because | |
511 // we also account for the return address location since | |
512 // we store it first rather than hold it in rax across all the shuffling | |
513 | |
1506 | 514 int extraspace = (total_args_passed * Interpreter::stackElementSize) + wordSize; |
0 | 515 |
516 // stack is aligned, keep it that way | |
517 extraspace = round_to(extraspace, 2*wordSize); | |
518 | |
519 // Get return address | |
304 | 520 __ pop(rax); |
0 | 521 |
522 // set senderSP value | |
304 | 523 __ mov(r13, rsp); |
524 | |
525 __ subptr(rsp, extraspace); | |
0 | 526 |
527 // Store the return address in the expected location | |
304 | 528 __ movptr(Address(rsp, 0), rax); |
0 | 529 |
530 // Now write the args into the outgoing interpreter space | |
531 for (int i = 0; i < total_args_passed; i++) { | |
532 if (sig_bt[i] == T_VOID) { | |
533 assert(i > 0 && (sig_bt[i-1] == T_LONG || sig_bt[i-1] == T_DOUBLE), "missing half"); | |
534 continue; | |
535 } | |
536 | |
537 // offset to start parameters | |
1506 | 538 int st_off = (total_args_passed - i) * Interpreter::stackElementSize; |
539 int next_off = st_off - Interpreter::stackElementSize; | |
0 | 540 |
541 // Say 4 args: | |
542 // i st_off | |
543 // 0 32 T_LONG | |
544 // 1 24 T_VOID | |
545 // 2 16 T_OBJECT | |
546 // 3 8 T_BOOL | |
547 // - 0 return address | |
548 // | |
549 // However to make thing extra confusing. Because we can fit a long/double in | |
550 // a single slot on a 64 bt vm and it would be silly to break them up, the interpreter | |
551 // leaves one slot empty and only stores to a single slot. In this case the | |
552 // slot that is occupied is the T_VOID slot. See I said it was confusing. | |
553 | |
554 VMReg r_1 = regs[i].first(); | |
555 VMReg r_2 = regs[i].second(); | |
556 if (!r_1->is_valid()) { | |
557 assert(!r_2->is_valid(), ""); | |
558 continue; | |
559 } | |
560 if (r_1->is_stack()) { | |
561 // memory to memory use rax | |
562 int ld_off = r_1->reg2stack() * VMRegImpl::stack_slot_size + extraspace; | |
563 if (!r_2->is_valid()) { | |
564 // sign extend?? | |
565 __ movl(rax, Address(rsp, ld_off)); | |
304 | 566 __ movptr(Address(rsp, st_off), rax); |
0 | 567 |
568 } else { | |
569 | |
570 __ movq(rax, Address(rsp, ld_off)); | |
571 | |
572 // Two VMREgs|OptoRegs can be T_OBJECT, T_ADDRESS, T_DOUBLE, T_LONG | |
573 // T_DOUBLE and T_LONG use two slots in the interpreter | |
574 if ( sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) { | |
575 // ld_off == LSW, ld_off+wordSize == MSW | |
576 // st_off == MSW, next_off == LSW | |
577 __ movq(Address(rsp, next_off), rax); | |
578 #ifdef ASSERT | |
579 // Overwrite the unused slot with known junk | |
580 __ mov64(rax, CONST64(0xdeadffffdeadaaaa)); | |
304 | 581 __ movptr(Address(rsp, st_off), rax); |
0 | 582 #endif /* ASSERT */ |
583 } else { | |
584 __ movq(Address(rsp, st_off), rax); | |
585 } | |
586 } | |
587 } else if (r_1->is_Register()) { | |
588 Register r = r_1->as_Register(); | |
589 if (!r_2->is_valid()) { | |
590 // must be only an int (or less ) so move only 32bits to slot | |
591 // why not sign extend?? | |
592 __ movl(Address(rsp, st_off), r); | |
593 } else { | |
594 // Two VMREgs|OptoRegs can be T_OBJECT, T_ADDRESS, T_DOUBLE, T_LONG | |
595 // T_DOUBLE and T_LONG use two slots in the interpreter | |
596 if ( sig_bt[i] == T_LONG || sig_bt[i] == T_DOUBLE) { | |
597 // long/double in gpr | |
598 #ifdef ASSERT | |
599 // Overwrite the unused slot with known junk | |
600 __ mov64(rax, CONST64(0xdeadffffdeadaaab)); | |
304 | 601 __ movptr(Address(rsp, st_off), rax); |
0 | 602 #endif /* ASSERT */ |
603 __ movq(Address(rsp, next_off), r); | |
604 } else { | |
304 | 605 __ movptr(Address(rsp, st_off), r); |
0 | 606 } |
607 } | |
608 } else { | |
609 assert(r_1->is_XMMRegister(), ""); | |
610 if (!r_2->is_valid()) { | |
611 // only a float use just part of the slot | |
612 __ movflt(Address(rsp, st_off), r_1->as_XMMRegister()); | |
613 } else { | |
614 #ifdef ASSERT | |
615 // Overwrite the unused slot with known junk | |
616 __ mov64(rax, CONST64(0xdeadffffdeadaaac)); | |
304 | 617 __ movptr(Address(rsp, st_off), rax); |
0 | 618 #endif /* ASSERT */ |
619 __ movdbl(Address(rsp, next_off), r_1->as_XMMRegister()); | |
620 } | |
621 } | |
622 } | |
623 | |
624 // Schedule the branch target address early. | |
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625 __ movptr(rcx, Address(rbx, in_bytes(Method::interpreter_entry_offset()))); |
0 | 626 __ jmp(rcx); |
627 } | |
628 | |
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629 static void range_check(MacroAssembler* masm, Register pc_reg, Register temp_reg, |
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630 address code_start, address code_end, |
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631 Label& L_ok) { |
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632 Label L_fail; |
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633 __ lea(temp_reg, ExternalAddress(code_start)); |
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634 __ cmpptr(pc_reg, temp_reg); |
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635 __ jcc(Assembler::belowEqual, L_fail); |
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636 __ lea(temp_reg, ExternalAddress(code_end)); |
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637 __ cmpptr(pc_reg, temp_reg); |
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638 __ jcc(Assembler::below, L_ok); |
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639 __ bind(L_fail); |
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640 } |
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641 |
0 | 642 static void gen_i2c_adapter(MacroAssembler *masm, |
643 int total_args_passed, | |
644 int comp_args_on_stack, | |
645 const BasicType *sig_bt, | |
646 const VMRegPair *regs) { | |
647 | |
648 // Note: r13 contains the senderSP on entry. We must preserve it since | |
649 // we may do a i2c -> c2i transition if we lose a race where compiled | |
650 // code goes non-entrant while we get args ready. | |
651 // In addition we use r13 to locate all the interpreter args as | |
652 // we must align the stack to 16 bytes on an i2c entry else we | |
653 // lose alignment we expect in all compiled code and register | |
654 // save code can segv when fxsave instructions find improperly | |
655 // aligned stack pointer. | |
656 | |
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657 // Adapters can be frameless because they do not require the caller |
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658 // to perform additional cleanup work, such as correcting the stack pointer. |
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659 // An i2c adapter is frameless because the *caller* frame, which is interpreted, |
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660 // routinely repairs its own stack pointer (from interpreter_frame_last_sp), |
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661 // even if a callee has modified the stack pointer. |
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662 // A c2i adapter is frameless because the *callee* frame, which is interpreted, |
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663 // routinely repairs its caller's stack pointer (from sender_sp, which is set |
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664 // up via the senderSP register). |
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665 // In other words, if *either* the caller or callee is interpreted, we can |
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666 // get the stack pointer repaired after a call. |
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667 // This is why c2i and i2c adapters cannot be indefinitely composed. |
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668 // In particular, if a c2i adapter were to somehow call an i2c adapter, |
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669 // both caller and callee would be compiled methods, and neither would |
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670 // clean up the stack pointer changes performed by the two adapters. |
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671 // If this happens, control eventually transfers back to the compiled |
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672 // caller, but with an uncorrected stack, causing delayed havoc. |
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673 |
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674 // Pick up the return address |
304 | 675 __ movptr(rax, Address(rsp, 0)); |
0 | 676 |
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677 if (VerifyAdapterCalls && |
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678 (Interpreter::code() != NULL || StubRoutines::code1() != NULL)) { |
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679 // So, let's test for cascading c2i/i2c adapters right now. |
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680 // assert(Interpreter::contains($return_addr) || |
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681 // StubRoutines::contains($return_addr), |
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682 // "i2c adapter must return to an interpreter frame"); |
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683 __ block_comment("verify_i2c { "); |
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684 Label L_ok; |
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685 if (Interpreter::code() != NULL) |
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686 range_check(masm, rax, r11, |
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687 Interpreter::code()->code_start(), Interpreter::code()->code_end(), |
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688 L_ok); |
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689 if (StubRoutines::code1() != NULL) |
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690 range_check(masm, rax, r11, |
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691 StubRoutines::code1()->code_begin(), StubRoutines::code1()->code_end(), |
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692 L_ok); |
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693 if (StubRoutines::code2() != NULL) |
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694 range_check(masm, rax, r11, |
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695 StubRoutines::code2()->code_begin(), StubRoutines::code2()->code_end(), |
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696 L_ok); |
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697 const char* msg = "i2c adapter must return to an interpreter frame"; |
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698 __ block_comment(msg); |
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699 __ stop(msg); |
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700 __ bind(L_ok); |
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701 __ block_comment("} verify_i2ce "); |
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702 } |
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703 |
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704 // Must preserve original SP for loading incoming arguments because |
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705 // we need to align the outgoing SP for compiled code. |
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706 __ movptr(r11, rsp); |
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707 |
0 | 708 // Cut-out for having no stack args. Since up to 2 int/oop args are passed |
709 // in registers, we will occasionally have no stack args. | |
710 int comp_words_on_stack = 0; | |
711 if (comp_args_on_stack) { | |
712 // Sig words on the stack are greater-than VMRegImpl::stack0. Those in | |
713 // registers are below. By subtracting stack0, we either get a negative | |
714 // number (all values in registers) or the maximum stack slot accessed. | |
715 | |
716 // Convert 4-byte c2 stack slots to words. | |
717 comp_words_on_stack = round_to(comp_args_on_stack*VMRegImpl::stack_slot_size, wordSize)>>LogBytesPerWord; | |
718 // Round up to miminum stack alignment, in wordSize | |
719 comp_words_on_stack = round_to(comp_words_on_stack, 2); | |
304 | 720 __ subptr(rsp, comp_words_on_stack * wordSize); |
0 | 721 } |
722 | |
723 | |
724 // Ensure compiled code always sees stack at proper alignment | |
304 | 725 __ andptr(rsp, -16); |
0 | 726 |
727 // push the return address and misalign the stack that youngest frame always sees | |
728 // as far as the placement of the call instruction | |
304 | 729 __ push(rax); |
0 | 730 |
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731 // Put saved SP in another register |
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732 const Register saved_sp = rax; |
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733 __ movptr(saved_sp, r11); |
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734 |
0 | 735 // Will jump to the compiled code just as if compiled code was doing it. |
736 // Pre-load the register-jump target early, to schedule it better. | |
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737 __ movptr(r11, Address(rbx, in_bytes(Method::from_compiled_offset()))); |
0 | 738 |
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739 #ifdef GRAAL |
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740 // check if this call should be routed towards a specific entry point |
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741 __ cmpptr(Address(r15_thread, in_bytes(JavaThread::graal_alternate_call_target_offset())), 0); |
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742 Label no_alternative_target; |
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743 __ jcc(Assembler::equal, no_alternative_target); |
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744 __ movptr(r11, Address(r15_thread, in_bytes(JavaThread::graal_alternate_call_target_offset()))); |
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745 __ movptr(Address(r15_thread, in_bytes(JavaThread::graal_alternate_call_target_offset())), 0); |
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746 __ bind(no_alternative_target); |
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747 #endif |
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748 |
0 | 749 // Now generate the shuffle code. Pick up all register args and move the |
750 // rest through the floating point stack top. | |
751 for (int i = 0; i < total_args_passed; i++) { | |
752 if (sig_bt[i] == T_VOID) { | |
753 // Longs and doubles are passed in native word order, but misaligned | |
754 // in the 32-bit build. | |
755 assert(i > 0 && (sig_bt[i-1] == T_LONG || sig_bt[i-1] == T_DOUBLE), "missing half"); | |
756 continue; | |
757 } | |
758 | |
759 // Pick up 0, 1 or 2 words from SP+offset. | |
760 | |
761 assert(!regs[i].second()->is_valid() || regs[i].first()->next() == regs[i].second(), | |
762 "scrambled load targets?"); | |
763 // Load in argument order going down. | |
1506 | 764 int ld_off = (total_args_passed - i)*Interpreter::stackElementSize; |
0 | 765 // Point to interpreter value (vs. tag) |
1506 | 766 int next_off = ld_off - Interpreter::stackElementSize; |
0 | 767 // |
768 // | |
769 // | |
770 VMReg r_1 = regs[i].first(); | |
771 VMReg r_2 = regs[i].second(); | |
772 if (!r_1->is_valid()) { | |
773 assert(!r_2->is_valid(), ""); | |
774 continue; | |
775 } | |
776 if (r_1->is_stack()) { | |
777 // Convert stack slot to an SP offset (+ wordSize to account for return address ) | |
778 int st_off = regs[i].first()->reg2stack()*VMRegImpl::stack_slot_size + wordSize; | |
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779 |
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780 // We can use r13 as a temp here because compiled code doesn't need r13 as an input |
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781 // and if we end up going thru a c2i because of a miss a reasonable value of r13 |
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782 // will be generated. |
0 | 783 if (!r_2->is_valid()) { |
784 // sign extend??? | |
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785 __ movl(r13, Address(saved_sp, ld_off)); |
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786 __ movptr(Address(rsp, st_off), r13); |
0 | 787 } else { |
788 // | |
789 // We are using two optoregs. This can be either T_OBJECT, T_ADDRESS, T_LONG, or T_DOUBLE | |
790 // the interpreter allocates two slots but only uses one for thr T_LONG or T_DOUBLE case | |
791 // So we must adjust where to pick up the data to match the interpreter. | |
792 // | |
793 // Interpreter local[n] == MSW, local[n+1] == LSW however locals | |
794 // are accessed as negative so LSW is at LOW address | |
795 | |
796 // ld_off is MSW so get LSW | |
797 const int offset = (sig_bt[i]==T_LONG||sig_bt[i]==T_DOUBLE)? | |
798 next_off : ld_off; | |
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799 __ movq(r13, Address(saved_sp, offset)); |
0 | 800 // st_off is LSW (i.e. reg.first()) |
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801 __ movq(Address(rsp, st_off), r13); |
0 | 802 } |
803 } else if (r_1->is_Register()) { // Register argument | |
804 Register r = r_1->as_Register(); | |
805 assert(r != rax, "must be different"); | |
806 if (r_2->is_valid()) { | |
807 // | |
808 // We are using two VMRegs. This can be either T_OBJECT, T_ADDRESS, T_LONG, or T_DOUBLE | |
809 // the interpreter allocates two slots but only uses one for thr T_LONG or T_DOUBLE case | |
810 // So we must adjust where to pick up the data to match the interpreter. | |
811 | |
812 const int offset = (sig_bt[i]==T_LONG||sig_bt[i]==T_DOUBLE)? | |
813 next_off : ld_off; | |
814 | |
815 // this can be a misaligned move | |
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816 __ movq(r, Address(saved_sp, offset)); |
0 | 817 } else { |
818 // sign extend and use a full word? | |
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819 __ movl(r, Address(saved_sp, ld_off)); |
0 | 820 } |
821 } else { | |
822 if (!r_2->is_valid()) { | |
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823 __ movflt(r_1->as_XMMRegister(), Address(saved_sp, ld_off)); |
0 | 824 } else { |
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825 __ movdbl(r_1->as_XMMRegister(), Address(saved_sp, next_off)); |
0 | 826 } |
827 } | |
828 } | |
829 | |
830 // 6243940 We might end up in handle_wrong_method if | |
831 // the callee is deoptimized as we race thru here. If that | |
832 // happens we don't want to take a safepoint because the | |
833 // caller frame will look interpreted and arguments are now | |
834 // "compiled" so it is much better to make this transition | |
835 // invisible to the stack walking code. Unfortunately if | |
836 // we try and find the callee by normal means a safepoint | |
837 // is possible. So we stash the desired callee in the thread | |
838 // and the vm will find there should this case occur. | |
839 | |
304 | 840 __ movptr(Address(r15_thread, JavaThread::callee_target_offset()), rbx); |
0 | 841 |
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842 // put Method* where a c2i would expect should we end up there |
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843 // only needed becaus eof c2 resolve stubs return Method* as a result in |
0 | 844 // rax |
304 | 845 __ mov(rax, rbx); |
0 | 846 __ jmp(r11); |
847 } | |
848 | |
849 // --------------------------------------------------------------- | |
850 AdapterHandlerEntry* SharedRuntime::generate_i2c2i_adapters(MacroAssembler *masm, | |
851 int total_args_passed, | |
852 int comp_args_on_stack, | |
853 const BasicType *sig_bt, | |
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854 const VMRegPair *regs, |
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855 AdapterFingerPrint* fingerprint) { |
0 | 856 address i2c_entry = __ pc(); |
857 | |
858 gen_i2c_adapter(masm, total_args_passed, comp_args_on_stack, sig_bt, regs); | |
859 | |
860 // ------------------------------------------------------------------------- | |
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861 // Generate a C2I adapter. On entry we know rbx holds the Method* during calls |
0 | 862 // to the interpreter. The args start out packed in the compiled layout. They |
863 // need to be unpacked into the interpreter layout. This will almost always | |
864 // require some stack space. We grow the current (compiled) stack, then repack | |
865 // the args. We finally end in a jump to the generic interpreter entry point. | |
866 // On exit from the interpreter, the interpreter will restore our SP (lest the | |
867 // compiled code, which relys solely on SP and not RBP, get sick). | |
868 | |
869 address c2i_unverified_entry = __ pc(); | |
870 Label skip_fixup; | |
871 Label ok; | |
872 | |
873 Register holder = rax; | |
874 Register receiver = j_rarg0; | |
875 Register temp = rbx; | |
876 | |
877 { | |
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878 __ load_klass(temp, receiver); |
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879 __ cmpptr(temp, Address(holder, CompiledICHolder::holder_klass_offset())); |
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880 __ movptr(rbx, Address(holder, CompiledICHolder::holder_method_offset())); |
0 | 881 __ jcc(Assembler::equal, ok); |
882 __ jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub())); | |
883 | |
884 __ bind(ok); | |
885 // Method might have been compiled since the call site was patched to | |
886 // interpreted if that is the case treat it as a miss so we can get | |
887 // the call site corrected. | |
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888 __ cmpptr(Address(rbx, in_bytes(Method::code_offset())), (int32_t)NULL_WORD); |
0 | 889 __ jcc(Assembler::equal, skip_fixup); |
890 __ jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub())); | |
891 } | |
892 | |
893 address c2i_entry = __ pc(); | |
894 | |
895 gen_c2i_adapter(masm, total_args_passed, comp_args_on_stack, sig_bt, regs, skip_fixup); | |
896 | |
897 __ flush(); | |
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898 return AdapterHandlerLibrary::new_entry(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry); |
0 | 899 } |
900 | |
901 int SharedRuntime::c_calling_convention(const BasicType *sig_bt, | |
902 VMRegPair *regs, | |
903 int total_args_passed) { | |
904 // We return the amount of VMRegImpl stack slots we need to reserve for all | |
905 // the arguments NOT counting out_preserve_stack_slots. | |
906 | |
907 // NOTE: These arrays will have to change when c1 is ported | |
908 #ifdef _WIN64 | |
909 static const Register INT_ArgReg[Argument::n_int_register_parameters_c] = { | |
910 c_rarg0, c_rarg1, c_rarg2, c_rarg3 | |
911 }; | |
912 static const XMMRegister FP_ArgReg[Argument::n_float_register_parameters_c] = { | |
913 c_farg0, c_farg1, c_farg2, c_farg3 | |
914 }; | |
915 #else | |
916 static const Register INT_ArgReg[Argument::n_int_register_parameters_c] = { | |
917 c_rarg0, c_rarg1, c_rarg2, c_rarg3, c_rarg4, c_rarg5 | |
918 }; | |
919 static const XMMRegister FP_ArgReg[Argument::n_float_register_parameters_c] = { | |
920 c_farg0, c_farg1, c_farg2, c_farg3, | |
921 c_farg4, c_farg5, c_farg6, c_farg7 | |
922 }; | |
923 #endif // _WIN64 | |
924 | |
925 | |
926 uint int_args = 0; | |
927 uint fp_args = 0; | |
928 uint stk_args = 0; // inc by 2 each time | |
929 | |
930 for (int i = 0; i < total_args_passed; i++) { | |
931 switch (sig_bt[i]) { | |
932 case T_BOOLEAN: | |
933 case T_CHAR: | |
934 case T_BYTE: | |
935 case T_SHORT: | |
936 case T_INT: | |
937 if (int_args < Argument::n_int_register_parameters_c) { | |
938 regs[i].set1(INT_ArgReg[int_args++]->as_VMReg()); | |
939 #ifdef _WIN64 | |
940 fp_args++; | |
941 // Allocate slots for callee to stuff register args the stack. | |
942 stk_args += 2; | |
943 #endif | |
944 } else { | |
945 regs[i].set1(VMRegImpl::stack2reg(stk_args)); | |
946 stk_args += 2; | |
947 } | |
948 break; | |
949 case T_LONG: | |
950 assert(sig_bt[i + 1] == T_VOID, "expecting half"); | |
951 // fall through | |
952 case T_OBJECT: | |
953 case T_ARRAY: | |
954 case T_ADDRESS: | |
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955 case T_METADATA: |
0 | 956 if (int_args < Argument::n_int_register_parameters_c) { |
957 regs[i].set2(INT_ArgReg[int_args++]->as_VMReg()); | |
958 #ifdef _WIN64 | |
959 fp_args++; | |
960 stk_args += 2; | |
961 #endif | |
962 } else { | |
963 regs[i].set2(VMRegImpl::stack2reg(stk_args)); | |
964 stk_args += 2; | |
965 } | |
966 break; | |
967 case T_FLOAT: | |
968 if (fp_args < Argument::n_float_register_parameters_c) { | |
969 regs[i].set1(FP_ArgReg[fp_args++]->as_VMReg()); | |
970 #ifdef _WIN64 | |
971 int_args++; | |
972 // Allocate slots for callee to stuff register args the stack. | |
973 stk_args += 2; | |
974 #endif | |
975 } else { | |
976 regs[i].set1(VMRegImpl::stack2reg(stk_args)); | |
977 stk_args += 2; | |
978 } | |
979 break; | |
980 case T_DOUBLE: | |
981 assert(sig_bt[i + 1] == T_VOID, "expecting half"); | |
982 if (fp_args < Argument::n_float_register_parameters_c) { | |
983 regs[i].set2(FP_ArgReg[fp_args++]->as_VMReg()); | |
984 #ifdef _WIN64 | |
985 int_args++; | |
986 // Allocate slots for callee to stuff register args the stack. | |
987 stk_args += 2; | |
988 #endif | |
989 } else { | |
990 regs[i].set2(VMRegImpl::stack2reg(stk_args)); | |
991 stk_args += 2; | |
992 } | |
993 break; | |
994 case T_VOID: // Halves of longs and doubles | |
995 assert(i != 0 && (sig_bt[i - 1] == T_LONG || sig_bt[i - 1] == T_DOUBLE), "expecting half"); | |
996 regs[i].set_bad(); | |
997 break; | |
998 default: | |
999 ShouldNotReachHere(); | |
1000 break; | |
1001 } | |
1002 } | |
1003 #ifdef _WIN64 | |
1004 // windows abi requires that we always allocate enough stack space | |
1005 // for 4 64bit registers to be stored down. | |
1006 if (stk_args < 8) { | |
1007 stk_args = 8; | |
1008 } | |
1009 #endif // _WIN64 | |
1010 | |
1011 return stk_args; | |
1012 } | |
1013 | |
1014 // On 64 bit we will store integer like items to the stack as | |
1015 // 64 bits items (sparc abi) even though java would only store | |
1016 // 32bits for a parameter. On 32bit it will simply be 32 bits | |
1017 // So this routine will do 32->32 on 32bit and 32->64 on 64bit | |
1018 static void move32_64(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
1019 if (src.first()->is_stack()) { | |
1020 if (dst.first()->is_stack()) { | |
1021 // stack to stack | |
1022 __ movslq(rax, Address(rbp, reg2offset_in(src.first()))); | |
1023 __ movq(Address(rsp, reg2offset_out(dst.first())), rax); | |
1024 } else { | |
1025 // stack to reg | |
1026 __ movslq(dst.first()->as_Register(), Address(rbp, reg2offset_in(src.first()))); | |
1027 } | |
1028 } else if (dst.first()->is_stack()) { | |
1029 // reg to stack | |
1030 // Do we really have to sign extend??? | |
1031 // __ movslq(src.first()->as_Register(), src.first()->as_Register()); | |
1032 __ movq(Address(rsp, reg2offset_out(dst.first())), src.first()->as_Register()); | |
1033 } else { | |
1034 // Do we really have to sign extend??? | |
1035 // __ movslq(dst.first()->as_Register(), src.first()->as_Register()); | |
1036 if (dst.first() != src.first()) { | |
1037 __ movq(dst.first()->as_Register(), src.first()->as_Register()); | |
1038 } | |
1039 } | |
1040 } | |
1041 | |
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1042 static void move_ptr(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { |
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1043 if (src.first()->is_stack()) { |
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1044 if (dst.first()->is_stack()) { |
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1045 // stack to stack |
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1046 __ movq(rax, Address(rbp, reg2offset_in(src.first()))); |
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1047 __ movq(Address(rsp, reg2offset_out(dst.first())), rax); |
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1048 } else { |
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1049 // stack to reg |
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1050 __ movq(dst.first()->as_Register(), Address(rbp, reg2offset_in(src.first()))); |
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1051 } |
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1052 } else if (dst.first()->is_stack()) { |
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1053 // reg to stack |
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1054 __ movq(Address(rsp, reg2offset_out(dst.first())), src.first()->as_Register()); |
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1055 } else { |
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1056 if (dst.first() != src.first()) { |
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1057 __ movq(dst.first()->as_Register(), src.first()->as_Register()); |
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1058 } |
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1059 } |
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1060 } |
0 | 1061 |
1062 // An oop arg. Must pass a handle not the oop itself | |
1063 static void object_move(MacroAssembler* masm, | |
1064 OopMap* map, | |
1065 int oop_handle_offset, | |
1066 int framesize_in_slots, | |
1067 VMRegPair src, | |
1068 VMRegPair dst, | |
1069 bool is_receiver, | |
1070 int* receiver_offset) { | |
1071 | |
1072 // must pass a handle. First figure out the location we use as a handle | |
1073 | |
1074 Register rHandle = dst.first()->is_stack() ? rax : dst.first()->as_Register(); | |
1075 | |
1076 // See if oop is NULL if it is we need no handle | |
1077 | |
1078 if (src.first()->is_stack()) { | |
1079 | |
1080 // Oop is already on the stack as an argument | |
1081 int offset_in_older_frame = src.first()->reg2stack() + SharedRuntime::out_preserve_stack_slots(); | |
1082 map->set_oop(VMRegImpl::stack2reg(offset_in_older_frame + framesize_in_slots)); | |
1083 if (is_receiver) { | |
1084 *receiver_offset = (offset_in_older_frame + framesize_in_slots) * VMRegImpl::stack_slot_size; | |
1085 } | |
1086 | |
304 | 1087 __ cmpptr(Address(rbp, reg2offset_in(src.first())), (int32_t)NULL_WORD); |
1088 __ lea(rHandle, Address(rbp, reg2offset_in(src.first()))); | |
0 | 1089 // conditionally move a NULL |
304 | 1090 __ cmovptr(Assembler::equal, rHandle, Address(rbp, reg2offset_in(src.first()))); |
0 | 1091 } else { |
1092 | |
1093 // Oop is in an a register we must store it to the space we reserve | |
1094 // on the stack for oop_handles and pass a handle if oop is non-NULL | |
1095 | |
1096 const Register rOop = src.first()->as_Register(); | |
1097 int oop_slot; | |
1098 if (rOop == j_rarg0) | |
1099 oop_slot = 0; | |
1100 else if (rOop == j_rarg1) | |
1101 oop_slot = 1; | |
1102 else if (rOop == j_rarg2) | |
1103 oop_slot = 2; | |
1104 else if (rOop == j_rarg3) | |
1105 oop_slot = 3; | |
1106 else if (rOop == j_rarg4) | |
1107 oop_slot = 4; | |
1108 else { | |
1109 assert(rOop == j_rarg5, "wrong register"); | |
1110 oop_slot = 5; | |
1111 } | |
1112 | |
1113 oop_slot = oop_slot * VMRegImpl::slots_per_word + oop_handle_offset; | |
1114 int offset = oop_slot*VMRegImpl::stack_slot_size; | |
1115 | |
1116 map->set_oop(VMRegImpl::stack2reg(oop_slot)); | |
1117 // Store oop in handle area, may be NULL | |
304 | 1118 __ movptr(Address(rsp, offset), rOop); |
0 | 1119 if (is_receiver) { |
1120 *receiver_offset = offset; | |
1121 } | |
1122 | |
304 | 1123 __ cmpptr(rOop, (int32_t)NULL_WORD); |
1124 __ lea(rHandle, Address(rsp, offset)); | |
0 | 1125 // conditionally move a NULL from the handle area where it was just stored |
304 | 1126 __ cmovptr(Assembler::equal, rHandle, Address(rsp, offset)); |
0 | 1127 } |
1128 | |
1129 // If arg is on the stack then place it otherwise it is already in correct reg. | |
1130 if (dst.first()->is_stack()) { | |
304 | 1131 __ movptr(Address(rsp, reg2offset_out(dst.first())), rHandle); |
0 | 1132 } |
1133 } | |
1134 | |
1135 // A float arg may have to do float reg int reg conversion | |
1136 static void float_move(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
1137 assert(!src.second()->is_valid() && !dst.second()->is_valid(), "bad float_move"); | |
1138 | |
1139 // The calling conventions assures us that each VMregpair is either | |
1140 // all really one physical register or adjacent stack slots. | |
1141 // This greatly simplifies the cases here compared to sparc. | |
1142 | |
1143 if (src.first()->is_stack()) { | |
1144 if (dst.first()->is_stack()) { | |
1145 __ movl(rax, Address(rbp, reg2offset_in(src.first()))); | |
304 | 1146 __ movptr(Address(rsp, reg2offset_out(dst.first())), rax); |
0 | 1147 } else { |
1148 // stack to reg | |
1149 assert(dst.first()->is_XMMRegister(), "only expect xmm registers as parameters"); | |
1150 __ movflt(dst.first()->as_XMMRegister(), Address(rbp, reg2offset_in(src.first()))); | |
1151 } | |
1152 } else if (dst.first()->is_stack()) { | |
1153 // reg to stack | |
1154 assert(src.first()->is_XMMRegister(), "only expect xmm registers as parameters"); | |
1155 __ movflt(Address(rsp, reg2offset_out(dst.first())), src.first()->as_XMMRegister()); | |
1156 } else { | |
1157 // reg to reg | |
1158 // In theory these overlap but the ordering is such that this is likely a nop | |
1159 if ( src.first() != dst.first()) { | |
1160 __ movdbl(dst.first()->as_XMMRegister(), src.first()->as_XMMRegister()); | |
1161 } | |
1162 } | |
1163 } | |
1164 | |
1165 // A long move | |
1166 static void long_move(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
1167 | |
1168 // The calling conventions assures us that each VMregpair is either | |
1169 // all really one physical register or adjacent stack slots. | |
1170 // This greatly simplifies the cases here compared to sparc. | |
1171 | |
1172 if (src.is_single_phys_reg() ) { | |
1173 if (dst.is_single_phys_reg()) { | |
1174 if (dst.first() != src.first()) { | |
304 | 1175 __ mov(dst.first()->as_Register(), src.first()->as_Register()); |
0 | 1176 } |
1177 } else { | |
1178 assert(dst.is_single_reg(), "not a stack pair"); | |
1179 __ movq(Address(rsp, reg2offset_out(dst.first())), src.first()->as_Register()); | |
1180 } | |
1181 } else if (dst.is_single_phys_reg()) { | |
1182 assert(src.is_single_reg(), "not a stack pair"); | |
1183 __ movq(dst.first()->as_Register(), Address(rbp, reg2offset_out(src.first()))); | |
1184 } else { | |
1185 assert(src.is_single_reg() && dst.is_single_reg(), "not stack pairs"); | |
1186 __ movq(rax, Address(rbp, reg2offset_in(src.first()))); | |
1187 __ movq(Address(rsp, reg2offset_out(dst.first())), rax); | |
1188 } | |
1189 } | |
1190 | |
1191 // A double move | |
1192 static void double_move(MacroAssembler* masm, VMRegPair src, VMRegPair dst) { | |
1193 | |
1194 // The calling conventions assures us that each VMregpair is either | |
1195 // all really one physical register or adjacent stack slots. | |
1196 // This greatly simplifies the cases here compared to sparc. | |
1197 | |
1198 if (src.is_single_phys_reg() ) { | |
1199 if (dst.is_single_phys_reg()) { | |
1200 // In theory these overlap but the ordering is such that this is likely a nop | |
1201 if ( src.first() != dst.first()) { | |
1202 __ movdbl(dst.first()->as_XMMRegister(), src.first()->as_XMMRegister()); | |
1203 } | |
1204 } else { | |
1205 assert(dst.is_single_reg(), "not a stack pair"); | |
1206 __ movdbl(Address(rsp, reg2offset_out(dst.first())), src.first()->as_XMMRegister()); | |
1207 } | |
1208 } else if (dst.is_single_phys_reg()) { | |
1209 assert(src.is_single_reg(), "not a stack pair"); | |
1210 __ movdbl(dst.first()->as_XMMRegister(), Address(rbp, reg2offset_out(src.first()))); | |
1211 } else { | |
1212 assert(src.is_single_reg() && dst.is_single_reg(), "not stack pairs"); | |
1213 __ movq(rax, Address(rbp, reg2offset_in(src.first()))); | |
1214 __ movq(Address(rsp, reg2offset_out(dst.first())), rax); | |
1215 } | |
1216 } | |
1217 | |
1218 | |
1219 void SharedRuntime::save_native_result(MacroAssembler *masm, BasicType ret_type, int frame_slots) { | |
1220 // We always ignore the frame_slots arg and just use the space just below frame pointer | |
1221 // which by this time is free to use | |
1222 switch (ret_type) { | |
1223 case T_FLOAT: | |
1224 __ movflt(Address(rbp, -wordSize), xmm0); | |
1225 break; | |
1226 case T_DOUBLE: | |
1227 __ movdbl(Address(rbp, -wordSize), xmm0); | |
1228 break; | |
1229 case T_VOID: break; | |
1230 default: { | |
304 | 1231 __ movptr(Address(rbp, -wordSize), rax); |
0 | 1232 } |
1233 } | |
1234 } | |
1235 | |
1236 void SharedRuntime::restore_native_result(MacroAssembler *masm, BasicType ret_type, int frame_slots) { | |
1237 // We always ignore the frame_slots arg and just use the space just below frame pointer | |
1238 // which by this time is free to use | |
1239 switch (ret_type) { | |
1240 case T_FLOAT: | |
1241 __ movflt(xmm0, Address(rbp, -wordSize)); | |
1242 break; | |
1243 case T_DOUBLE: | |
1244 __ movdbl(xmm0, Address(rbp, -wordSize)); | |
1245 break; | |
1246 case T_VOID: break; | |
1247 default: { | |
304 | 1248 __ movptr(rax, Address(rbp, -wordSize)); |
0 | 1249 } |
1250 } | |
1251 } | |
1252 | |
1253 static void save_args(MacroAssembler *masm, int arg_count, int first_arg, VMRegPair *args) { | |
1254 for ( int i = first_arg ; i < arg_count ; i++ ) { | |
1255 if (args[i].first()->is_Register()) { | |
304 | 1256 __ push(args[i].first()->as_Register()); |
0 | 1257 } else if (args[i].first()->is_XMMRegister()) { |
304 | 1258 __ subptr(rsp, 2*wordSize); |
0 | 1259 __ movdbl(Address(rsp, 0), args[i].first()->as_XMMRegister()); |
1260 } | |
1261 } | |
1262 } | |
1263 | |
1264 static void restore_args(MacroAssembler *masm, int arg_count, int first_arg, VMRegPair *args) { | |
1265 for ( int i = arg_count - 1 ; i >= first_arg ; i-- ) { | |
1266 if (args[i].first()->is_Register()) { | |
304 | 1267 __ pop(args[i].first()->as_Register()); |
0 | 1268 } else if (args[i].first()->is_XMMRegister()) { |
1269 __ movdbl(args[i].first()->as_XMMRegister(), Address(rsp, 0)); | |
304 | 1270 __ addptr(rsp, 2*wordSize); |
0 | 1271 } |
1272 } | |
1273 } | |
1274 | |
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1275 |
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1276 static void save_or_restore_arguments(MacroAssembler* masm, |
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1277 const int stack_slots, |
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1278 const int total_in_args, |
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1279 const int arg_save_area, |
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1280 OopMap* map, |
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1281 VMRegPair* in_regs, |
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1282 BasicType* in_sig_bt) { |
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1283 // if map is non-NULL then the code should store the values, |
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1284 // otherwise it should load them. |
5905 | 1285 int slot = arg_save_area; |
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1286 // Save down double word first |
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1287 for ( int i = 0; i < total_in_args; i++) { |
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1288 if (in_regs[i].first()->is_XMMRegister() && in_sig_bt[i] == T_DOUBLE) { |
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1289 int offset = slot * VMRegImpl::stack_slot_size; |
5905 | 1290 slot += VMRegImpl::slots_per_word; |
1291 assert(slot <= stack_slots, "overflow"); | |
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1292 if (map != NULL) { |
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1293 __ movdbl(Address(rsp, offset), in_regs[i].first()->as_XMMRegister()); |
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1294 } else { |
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1295 __ movdbl(in_regs[i].first()->as_XMMRegister(), Address(rsp, offset)); |
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1296 } |
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1297 } |
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1298 if (in_regs[i].first()->is_Register() && |
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1299 (in_sig_bt[i] == T_LONG || in_sig_bt[i] == T_ARRAY)) { |
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1300 int offset = slot * VMRegImpl::stack_slot_size; |
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1301 if (map != NULL) { |
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1302 __ movq(Address(rsp, offset), in_regs[i].first()->as_Register()); |
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1303 if (in_sig_bt[i] == T_ARRAY) { |
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1304 map->set_oop(VMRegImpl::stack2reg(slot));; |
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1305 } |
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1306 } else { |
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1307 __ movq(in_regs[i].first()->as_Register(), Address(rsp, offset)); |
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1308 } |
5907 | 1309 slot += VMRegImpl::slots_per_word; |
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1310 } |
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1311 } |
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1312 // Save or restore single word registers |
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1313 for ( int i = 0; i < total_in_args; i++) { |
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1314 if (in_regs[i].first()->is_Register()) { |
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1315 int offset = slot * VMRegImpl::stack_slot_size; |
5905 | 1316 slot++; |
1317 assert(slot <= stack_slots, "overflow"); | |
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1318 |
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1319 // Value is in an input register pass we must flush it to the stack |
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1320 const Register reg = in_regs[i].first()->as_Register(); |
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1321 switch (in_sig_bt[i]) { |
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1322 case T_BOOLEAN: |
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1323 case T_CHAR: |
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1324 case T_BYTE: |
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1325 case T_SHORT: |
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1326 case T_INT: |
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1327 if (map != NULL) { |
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1328 __ movl(Address(rsp, offset), reg); |
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1329 } else { |
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1330 __ movl(reg, Address(rsp, offset)); |
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1331 } |
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1332 break; |
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1333 case T_ARRAY: |
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1334 case T_LONG: |
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1335 // handled above |
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1336 break; |
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1337 case T_OBJECT: |
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1338 default: ShouldNotReachHere(); |
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1339 } |
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1340 } else if (in_regs[i].first()->is_XMMRegister()) { |
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1341 if (in_sig_bt[i] == T_FLOAT) { |
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1342 int offset = slot * VMRegImpl::stack_slot_size; |
5905 | 1343 slot++; |
1344 assert(slot <= stack_slots, "overflow"); | |
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1345 if (map != NULL) { |
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1346 __ movflt(Address(rsp, offset), in_regs[i].first()->as_XMMRegister()); |
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1347 } else { |
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1348 __ movflt(in_regs[i].first()->as_XMMRegister(), Address(rsp, offset)); |
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1349 } |
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1350 } |
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1351 } else if (in_regs[i].first()->is_stack()) { |
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1352 if (in_sig_bt[i] == T_ARRAY && map != NULL) { |
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1353 int offset_in_older_frame = in_regs[i].first()->reg2stack() + SharedRuntime::out_preserve_stack_slots(); |
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1354 map->set_oop(VMRegImpl::stack2reg(offset_in_older_frame + stack_slots)); |
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1355 } |
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1356 } |
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1357 } |
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1358 } |
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1359 |
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1360 |
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1361 // Check GC_locker::needs_gc and enter the runtime if it's true. This |
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1362 // keeps a new JNI critical region from starting until a GC has been |
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1363 // forced. Save down any oops in registers and describe them in an |
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1364 // OopMap. |
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1365 static void check_needs_gc_for_critical_native(MacroAssembler* masm, |
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1366 int stack_slots, |
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1367 int total_c_args, |
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1368 int total_in_args, |
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1369 int arg_save_area, |
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1370 OopMapSet* oop_maps, |
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1371 VMRegPair* in_regs, |
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1372 BasicType* in_sig_bt) { |
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1373 __ block_comment("check GC_locker::needs_gc"); |
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1374 Label cont; |
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1375 __ cmp8(ExternalAddress((address)GC_locker::needs_gc_address()), false); |
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1376 __ jcc(Assembler::equal, cont); |
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1377 |
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1378 // Save down any incoming oops and call into the runtime to halt for a GC |
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1379 |
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1380 OopMap* map = new OopMap(stack_slots * 2, 0 /* arg_slots*/); |
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1381 save_or_restore_arguments(masm, stack_slots, total_in_args, |
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1382 arg_save_area, map, in_regs, in_sig_bt); |
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1383 |
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1384 address the_pc = __ pc(); |
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1385 oop_maps->add_gc_map( __ offset(), map); |
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1386 __ set_last_Java_frame(rsp, noreg, the_pc); |
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1387 |
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1388 __ block_comment("block_for_jni_critical"); |
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1389 __ movptr(c_rarg0, r15_thread); |
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1390 __ mov(r12, rsp); // remember sp |
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1391 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows |
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1392 __ andptr(rsp, -16); // align stack as required by ABI |
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1393 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::block_for_jni_critical))); |
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1394 __ mov(rsp, r12); // restore sp |
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1395 __ reinit_heapbase(); |
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1396 |
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1397 __ reset_last_Java_frame(false, true); |
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1398 |
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1399 save_or_restore_arguments(masm, stack_slots, total_in_args, |
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1400 arg_save_area, NULL, in_regs, in_sig_bt); |
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1401 |
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1402 __ bind(cont); |
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1403 #ifdef ASSERT |
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1404 if (StressCriticalJNINatives) { |
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1405 // Stress register saving |
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1406 OopMap* map = new OopMap(stack_slots * 2, 0 /* arg_slots*/); |
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1407 save_or_restore_arguments(masm, stack_slots, total_in_args, |
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1408 arg_save_area, map, in_regs, in_sig_bt); |
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1409 // Destroy argument registers |
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1410 for (int i = 0; i < total_in_args - 1; i++) { |
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1411 if (in_regs[i].first()->is_Register()) { |
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1412 const Register reg = in_regs[i].first()->as_Register(); |
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1413 __ xorptr(reg, reg); |
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1414 } else if (in_regs[i].first()->is_XMMRegister()) { |
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1415 __ xorpd(in_regs[i].first()->as_XMMRegister(), in_regs[i].first()->as_XMMRegister()); |
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1416 } else if (in_regs[i].first()->is_FloatRegister()) { |
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1417 ShouldNotReachHere(); |
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1418 } else if (in_regs[i].first()->is_stack()) { |
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1419 // Nothing to do |
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1420 } else { |
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1421 ShouldNotReachHere(); |
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1422 } |
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1423 if (in_sig_bt[i] == T_LONG || in_sig_bt[i] == T_DOUBLE) { |
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1424 i++; |
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1425 } |
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1426 } |
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1427 |
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1428 save_or_restore_arguments(masm, stack_slots, total_in_args, |
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1429 arg_save_area, NULL, in_regs, in_sig_bt); |
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1430 } |
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1431 #endif |
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1432 } |
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1433 |
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1434 // Unpack an array argument into a pointer to the body and the length |
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1435 // if the array is non-null, otherwise pass 0 for both. |
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1436 static void unpack_array_argument(MacroAssembler* masm, VMRegPair reg, BasicType in_elem_type, VMRegPair body_arg, VMRegPair length_arg) { |
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1437 Register tmp_reg = rax; |
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1438 assert(!body_arg.first()->is_Register() || body_arg.first()->as_Register() != tmp_reg, |
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1439 "possible collision"); |
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1440 assert(!length_arg.first()->is_Register() || length_arg.first()->as_Register() != tmp_reg, |
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1441 "possible collision"); |
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1442 |
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1443 // Pass the length, ptr pair |
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1444 Label is_null, done; |
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1445 VMRegPair tmp; |
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1446 tmp.set_ptr(tmp_reg->as_VMReg()); |
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1447 if (reg.first()->is_stack()) { |
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1448 // Load the arg up from the stack |
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1449 move_ptr(masm, reg, tmp); |
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1450 reg = tmp; |
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1451 } |
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1452 __ testptr(reg.first()->as_Register(), reg.first()->as_Register()); |
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1453 __ jccb(Assembler::equal, is_null); |
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1454 __ lea(tmp_reg, Address(reg.first()->as_Register(), arrayOopDesc::base_offset_in_bytes(in_elem_type))); |
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1455 move_ptr(masm, tmp, body_arg); |
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1456 // load the length relative to the body. |
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1457 __ movl(tmp_reg, Address(tmp_reg, arrayOopDesc::length_offset_in_bytes() - |
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1458 arrayOopDesc::base_offset_in_bytes(in_elem_type))); |
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1459 move32_64(masm, tmp, length_arg); |
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1460 __ jmpb(done); |
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1461 __ bind(is_null); |
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1462 // Pass zeros |
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1463 __ xorptr(tmp_reg, tmp_reg); |
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1464 move_ptr(masm, tmp, body_arg); |
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1465 move32_64(masm, tmp, length_arg); |
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1466 __ bind(done); |
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1467 } |
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1468 |
5905 | 1469 |
6266
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1470 // Different signatures may require very different orders for the move |
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1471 // to avoid clobbering other arguments. There's no simple way to |
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1472 // order them safely. Compute a safe order for issuing stores and |
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1473 // break any cycles in those stores. This code is fairly general but |
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1474 // it's not necessary on the other platforms so we keep it in the |
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1475 // platform dependent code instead of moving it into a shared file. |
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1476 // (See bugs 7013347 & 7145024.) |
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1477 // Note that this code is specific to LP64. |
5905 | 1478 class ComputeMoveOrder: public StackObj { |
1479 class MoveOperation: public ResourceObj { | |
1480 friend class ComputeMoveOrder; | |
1481 private: | |
1482 VMRegPair _src; | |
1483 VMRegPair _dst; | |
1484 int _src_index; | |
1485 int _dst_index; | |
1486 bool _processed; | |
1487 MoveOperation* _next; | |
1488 MoveOperation* _prev; | |
1489 | |
1490 static int get_id(VMRegPair r) { | |
1491 return r.first()->value(); | |
1492 } | |
1493 | |
1494 public: | |
1495 MoveOperation(int src_index, VMRegPair src, int dst_index, VMRegPair dst): | |
1496 _src(src) | |
1497 , _src_index(src_index) | |
1498 , _dst(dst) | |
1499 , _dst_index(dst_index) | |
1500 , _next(NULL) | |
1501 , _prev(NULL) | |
1502 , _processed(false) { | |
1503 } | |
1504 | |
1505 VMRegPair src() const { return _src; } | |
1506 int src_id() const { return get_id(src()); } | |
1507 int src_index() const { return _src_index; } | |
1508 VMRegPair dst() const { return _dst; } | |
1509 void set_dst(int i, VMRegPair dst) { _dst_index = i, _dst = dst; } | |
1510 int dst_index() const { return _dst_index; } | |
1511 int dst_id() const { return get_id(dst()); } | |
1512 MoveOperation* next() const { return _next; } | |
1513 MoveOperation* prev() const { return _prev; } | |
1514 void set_processed() { _processed = true; } | |
1515 bool is_processed() const { return _processed; } | |
1516 | |
1517 // insert | |
1518 void break_cycle(VMRegPair temp_register) { | |
1519 // create a new store following the last store | |
1520 // to move from the temp_register to the original | |
1521 MoveOperation* new_store = new MoveOperation(-1, temp_register, dst_index(), dst()); | |
1522 | |
1523 // break the cycle of links and insert new_store at the end | |
1524 // break the reverse link. | |
1525 MoveOperation* p = prev(); | |
1526 assert(p->next() == this, "must be"); | |
1527 _prev = NULL; | |
1528 p->_next = new_store; | |
1529 new_store->_prev = p; | |
1530 | |
1531 // change the original store to save it's value in the temp. | |
1532 set_dst(-1, temp_register); | |
1533 } | |
1534 | |
1535 void link(GrowableArray<MoveOperation*>& killer) { | |
1536 // link this store in front the store that it depends on | |
1537 MoveOperation* n = killer.at_grow(src_id(), NULL); | |
1538 if (n != NULL) { | |
1539 assert(_next == NULL && n->_prev == NULL, "shouldn't have been set yet"); | |
1540 _next = n; | |
1541 n->_prev = this; | |
1542 } | |
1543 } | |
1544 }; | |
1545 | |
1546 private: | |
1547 GrowableArray<MoveOperation*> edges; | |
1548 | |
1549 public: | |
1550 ComputeMoveOrder(int total_in_args, VMRegPair* in_regs, int total_c_args, VMRegPair* out_regs, | |
1551 BasicType* in_sig_bt, GrowableArray<int>& arg_order, VMRegPair tmp_vmreg) { | |
1552 // Move operations where the dest is the stack can all be | |
1553 // scheduled first since they can't interfere with the other moves. | |
1554 for (int i = total_in_args - 1, c_arg = total_c_args - 1; i >= 0; i--, c_arg--) { | |
1555 if (in_sig_bt[i] == T_ARRAY) { | |
1556 c_arg--; | |
1557 if (out_regs[c_arg].first()->is_stack() && | |
1558 out_regs[c_arg + 1].first()->is_stack()) { | |
1559 arg_order.push(i); | |
1560 arg_order.push(c_arg); | |
1561 } else { | |
1562 if (out_regs[c_arg].first()->is_stack() || | |
1563 in_regs[i].first() == out_regs[c_arg].first()) { | |
1564 add_edge(i, in_regs[i].first(), c_arg, out_regs[c_arg + 1]); | |
1565 } else { | |
1566 add_edge(i, in_regs[i].first(), c_arg, out_regs[c_arg]); | |
1567 } | |
1568 } | |
1569 } else if (in_sig_bt[i] == T_VOID) { | |
1570 arg_order.push(i); | |
1571 arg_order.push(c_arg); | |
1572 } else { | |
1573 if (out_regs[c_arg].first()->is_stack() || | |
1574 in_regs[i].first() == out_regs[c_arg].first()) { | |
1575 arg_order.push(i); | |
1576 arg_order.push(c_arg); | |
1577 } else { | |
1578 add_edge(i, in_regs[i].first(), c_arg, out_regs[c_arg]); | |
1579 } | |
1580 } | |
1581 } | |
1582 // Break any cycles in the register moves and emit the in the | |
1583 // proper order. | |
1584 GrowableArray<MoveOperation*>* stores = get_store_order(tmp_vmreg); | |
1585 for (int i = 0; i < stores->length(); i++) { | |
1586 arg_order.push(stores->at(i)->src_index()); | |
1587 arg_order.push(stores->at(i)->dst_index()); | |
1588 } | |
1589 } | |
1590 | |
1591 // Collected all the move operations | |
1592 void add_edge(int src_index, VMRegPair src, int dst_index, VMRegPair dst) { | |
1593 if (src.first() == dst.first()) return; | |
1594 edges.append(new MoveOperation(src_index, src, dst_index, dst)); | |
1595 } | |
1596 | |
1597 // Walk the edges breaking cycles between moves. The result list | |
1598 // can be walked in order to produce the proper set of loads | |
1599 GrowableArray<MoveOperation*>* get_store_order(VMRegPair temp_register) { | |
1600 // Record which moves kill which values | |
1601 GrowableArray<MoveOperation*> killer; | |
1602 for (int i = 0; i < edges.length(); i++) { | |
1603 MoveOperation* s = edges.at(i); | |
1604 assert(killer.at_grow(s->dst_id(), NULL) == NULL, "only one killer"); | |
1605 killer.at_put_grow(s->dst_id(), s, NULL); | |
1606 } | |
1607 assert(killer.at_grow(MoveOperation::get_id(temp_register), NULL) == NULL, | |
1608 "make sure temp isn't in the registers that are killed"); | |
1609 | |
1610 // create links between loads and stores | |
1611 for (int i = 0; i < edges.length(); i++) { | |
1612 edges.at(i)->link(killer); | |
1613 } | |
1614 | |
1615 // at this point, all the move operations are chained together | |
1616 // in a doubly linked list. Processing it backwards finds | |
1617 // the beginning of the chain, forwards finds the end. If there's | |
1618 // a cycle it can be broken at any point, so pick an edge and walk | |
1619 // backward until the list ends or we end where we started. | |
1620 GrowableArray<MoveOperation*>* stores = new GrowableArray<MoveOperation*>(); | |
1621 for (int e = 0; e < edges.length(); e++) { | |
1622 MoveOperation* s = edges.at(e); | |
1623 if (!s->is_processed()) { | |
1624 MoveOperation* start = s; | |
1625 // search for the beginning of the chain or cycle | |
1626 while (start->prev() != NULL && start->prev() != s) { | |
1627 start = start->prev(); | |
1628 } | |
1629 if (start->prev() == s) { | |
1630 start->break_cycle(temp_register); | |
1631 } | |
1632 // walk the chain forward inserting to store list | |
1633 while (start != NULL) { | |
1634 stores->append(start); | |
1635 start->set_processed(); | |
1636 start = start->next(); | |
1637 } | |
1638 } | |
1639 } | |
1640 return stores; | |
1641 } | |
1642 }; | |
1643 | |
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1644 static void verify_oop_args(MacroAssembler* masm, |
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1645 methodHandle method, |
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1646 const BasicType* sig_bt, |
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1647 const VMRegPair* regs) { |
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1648 Register temp_reg = rbx; // not part of any compiled calling seq |
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1649 if (VerifyOops) { |
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1650 for (int i = 0; i < method->size_of_parameters(); i++) { |
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1651 if (sig_bt[i] == T_OBJECT || |
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1652 sig_bt[i] == T_ARRAY) { |
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1653 VMReg r = regs[i].first(); |
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1654 assert(r->is_valid(), "bad oop arg"); |
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1655 if (r->is_stack()) { |
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1656 __ movptr(temp_reg, Address(rsp, r->reg2stack() * VMRegImpl::stack_slot_size + wordSize)); |
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1657 __ verify_oop(temp_reg); |
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1658 } else { |
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1659 __ verify_oop(r->as_Register()); |
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1660 } |
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1661 } |
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1662 } |
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1663 } |
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1664 } |
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1665 |
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1666 static void gen_special_dispatch(MacroAssembler* masm, |
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1667 methodHandle method, |
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1668 const BasicType* sig_bt, |
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1669 const VMRegPair* regs) { |
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1670 verify_oop_args(masm, method, sig_bt, regs); |
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1671 vmIntrinsics::ID iid = method->intrinsic_id(); |
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1672 |
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1673 // Now write the args into the outgoing interpreter space |
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1674 bool has_receiver = false; |
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1675 Register receiver_reg = noreg; |
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1676 int member_arg_pos = -1; |
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1677 Register member_reg = noreg; |
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1678 int ref_kind = MethodHandles::signature_polymorphic_intrinsic_ref_kind(iid); |
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1679 if (ref_kind != 0) { |
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1680 member_arg_pos = method->size_of_parameters() - 1; // trailing MemberName argument |
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1681 member_reg = rbx; // known to be free at this point |
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1682 has_receiver = MethodHandles::ref_kind_has_receiver(ref_kind); |
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1683 } else if (iid == vmIntrinsics::_invokeBasic) { |
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1684 has_receiver = true; |
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1685 } else { |
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1686 fatal(err_msg_res("unexpected intrinsic id %d", iid)); |
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1687 } |
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1688 |
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1689 if (member_reg != noreg) { |
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1690 // Load the member_arg into register, if necessary. |
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1691 SharedRuntime::check_member_name_argument_is_last_argument(method, sig_bt, regs); |
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1692 VMReg r = regs[member_arg_pos].first(); |
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1693 if (r->is_stack()) { |
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1694 __ movptr(member_reg, Address(rsp, r->reg2stack() * VMRegImpl::stack_slot_size + wordSize)); |
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1695 } else { |
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1696 // no data motion is needed |
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1697 member_reg = r->as_Register(); |
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1698 } |
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1699 } |
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1700 |
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1701 if (has_receiver) { |
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1702 // Make sure the receiver is loaded into a register. |
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1703 assert(method->size_of_parameters() > 0, "oob"); |
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1704 assert(sig_bt[0] == T_OBJECT, "receiver argument must be an object"); |
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1705 VMReg r = regs[0].first(); |
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1706 assert(r->is_valid(), "bad receiver arg"); |
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1707 if (r->is_stack()) { |
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1708 // Porting note: This assumes that compiled calling conventions always |
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1709 // pass the receiver oop in a register. If this is not true on some |
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1710 // platform, pick a temp and load the receiver from stack. |
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1711 fatal("receiver always in a register"); |
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1712 receiver_reg = j_rarg0; // known to be free at this point |
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1713 __ movptr(receiver_reg, Address(rsp, r->reg2stack() * VMRegImpl::stack_slot_size + wordSize)); |
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1714 } else { |
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1715 // no data motion is needed |
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1716 receiver_reg = r->as_Register(); |
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1717 } |
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1718 } |
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1719 |
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1720 // Figure out which address we are really jumping to: |
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1721 MethodHandles::generate_method_handle_dispatch(masm, iid, |
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1722 receiver_reg, member_reg, /*for_compiler_entry:*/ true); |
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1723 } |
5905 | 1724 |
0 | 1725 // --------------------------------------------------------------------------- |
1726 // Generate a native wrapper for a given method. The method takes arguments | |
1727 // in the Java compiled code convention, marshals them to the native | |
1728 // convention (handlizes oops, etc), transitions to native, makes the call, | |
1729 // returns to java state (possibly blocking), unhandlizes any result and | |
1730 // returns. | |
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1731 // |
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1732 // Critical native functions are a shorthand for the use of |
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1733 // GetPrimtiveArrayCritical and disallow the use of any other JNI |
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1734 // functions. The wrapper is expected to unpack the arguments before |
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1735 // passing them to the callee and perform checks before and after the |
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1736 // native call to ensure that they GC_locker |
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1737 // lock_critical/unlock_critical semantics are followed. Some other |
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1738 // parts of JNI setup are skipped like the tear down of the JNI handle |
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1739 // block and the check for pending exceptions it's impossible for them |
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1740 // to be thrown. |
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1741 // |
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1742 // They are roughly structured like this: |
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1743 // if (GC_locker::needs_gc()) |
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1744 // SharedRuntime::block_for_jni_critical(); |
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1745 // tranistion to thread_in_native |
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1746 // unpack arrray arguments and call native entry point |
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1747 // check for safepoint in progress |
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1748 // check if any thread suspend flags are set |
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1749 // call into JVM and possible unlock the JNI critical |
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1750 // if a GC was suppressed while in the critical native. |
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1751 // transition back to thread_in_Java |
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1752 // return to caller |
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1753 // |
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1754 nmethod* SharedRuntime::generate_native_wrapper(MacroAssembler* masm, |
0 | 1755 methodHandle method, |
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1756 int compile_id, |
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1757 BasicType* in_sig_bt, |
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1758 VMRegPair* in_regs, |
0 | 1759 BasicType ret_type) { |
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1760 if (method->is_method_handle_intrinsic()) { |
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1761 vmIntrinsics::ID iid = method->intrinsic_id(); |
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1762 intptr_t start = (intptr_t)__ pc(); |
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1763 int vep_offset = ((intptr_t)__ pc()) - start; |
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1764 gen_special_dispatch(masm, |
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1765 method, |
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1766 in_sig_bt, |
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1767 in_regs); |
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1768 int frame_complete = ((intptr_t)__ pc()) - start; // not complete, period |
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1769 __ flush(); |
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1770 int stack_slots = SharedRuntime::out_preserve_stack_slots(); // no out slots at all, actually |
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1771 return nmethod::new_native_nmethod(method, |
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1772 compile_id, |
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1773 masm->code(), |
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1774 vep_offset, |
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1775 frame_complete, |
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1776 stack_slots / VMRegImpl::slots_per_word, |
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1777 in_ByteSize(-1), |
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1778 in_ByteSize(-1), |
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1779 (OopMapSet*)NULL); |
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1780 } |
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1781 bool is_critical_native = true; |
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1782 address native_func = method->critical_native_function(); |
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1783 if (native_func == NULL) { |
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1784 native_func = method->native_function(); |
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1785 is_critical_native = false; |
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1786 } |
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1787 assert(native_func != NULL, "must have function"); |
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1788 |
0 | 1789 // An OopMap for lock (and class if static) |
1790 OopMapSet *oop_maps = new OopMapSet(); | |
1791 intptr_t start = (intptr_t)__ pc(); | |
1792 | |
1793 // We have received a description of where all the java arg are located | |
1794 // on entry to the wrapper. We need to convert these args to where | |
1795 // the jni function will expect them. To figure out where they go | |
1796 // we convert the java signature to a C signature by inserting | |
1797 // the hidden arguments as arg[0] and possibly arg[1] (static method) | |
1798 | |
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1799 const int total_in_args = method->size_of_parameters(); |
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1800 int total_c_args = total_in_args; |
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1801 if (!is_critical_native) { |
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1802 total_c_args += 1; |
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1803 if (method->is_static()) { |
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1804 total_c_args++; |
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1805 } |
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1806 } else { |
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1807 for (int i = 0; i < total_in_args; i++) { |
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1808 if (in_sig_bt[i] == T_ARRAY) { |
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1809 total_c_args++; |
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1810 } |
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1811 } |
0 | 1812 } |
1813 | |
1814 BasicType* out_sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_c_args); | |
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1815 VMRegPair* out_regs = NEW_RESOURCE_ARRAY(VMRegPair, total_c_args); |
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1816 BasicType* in_elem_bt = NULL; |
0 | 1817 |
1818 int argc = 0; | |
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1819 if (!is_critical_native) { |
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1820 out_sig_bt[argc++] = T_ADDRESS; |
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1821 if (method->is_static()) { |
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1822 out_sig_bt[argc++] = T_OBJECT; |
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1823 } |
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1824 |
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1825 for (int i = 0; i < total_in_args ; i++ ) { |
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1826 out_sig_bt[argc++] = in_sig_bt[i]; |
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1827 } |
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1828 } else { |
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1829 Thread* THREAD = Thread::current(); |
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1830 in_elem_bt = NEW_RESOURCE_ARRAY(BasicType, total_in_args); |
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1831 SignatureStream ss(method->signature()); |
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1832 for (int i = 0; i < total_in_args ; i++ ) { |
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1833 if (in_sig_bt[i] == T_ARRAY) { |
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1834 // Arrays are passed as int, elem* pair |
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1835 out_sig_bt[argc++] = T_INT; |
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1836 out_sig_bt[argc++] = T_ADDRESS; |
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1837 Symbol* atype = ss.as_symbol(CHECK_NULL); |
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1838 const char* at = atype->as_C_string(); |
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1839 if (strlen(at) == 2) { |
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1840 assert(at[0] == '[', "must be"); |
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1841 switch (at[1]) { |
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1842 case 'B': in_elem_bt[i] = T_BYTE; break; |
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1843 case 'C': in_elem_bt[i] = T_CHAR; break; |
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1844 case 'D': in_elem_bt[i] = T_DOUBLE; break; |
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1845 case 'F': in_elem_bt[i] = T_FLOAT; break; |
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1846 case 'I': in_elem_bt[i] = T_INT; break; |
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1847 case 'J': in_elem_bt[i] = T_LONG; break; |
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1848 case 'S': in_elem_bt[i] = T_SHORT; break; |
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1849 case 'Z': in_elem_bt[i] = T_BOOLEAN; break; |
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1850 default: ShouldNotReachHere(); |
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1851 } |
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1852 } |
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1853 } else { |
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1854 out_sig_bt[argc++] = in_sig_bt[i]; |
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1855 in_elem_bt[i] = T_VOID; |
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1856 } |
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1857 if (in_sig_bt[i] != T_VOID) { |
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1858 assert(in_sig_bt[i] == ss.type(), "must match"); |
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1859 ss.next(); |
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1860 } |
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1861 } |
0 | 1862 } |
1863 | |
1864 // Now figure out where the args must be stored and how much stack space | |
1865 // they require. | |
1866 int out_arg_slots; | |
1867 out_arg_slots = c_calling_convention(out_sig_bt, out_regs, total_c_args); | |
1868 | |
1869 // Compute framesize for the wrapper. We need to handlize all oops in | |
1870 // incoming registers | |
1871 | |
1872 // Calculate the total number of stack slots we will need. | |
1873 | |
1874 // First count the abi requirement plus all of the outgoing args | |
1875 int stack_slots = SharedRuntime::out_preserve_stack_slots() + out_arg_slots; | |
1876 | |
1877 // Now the space for the inbound oop handle area | |
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1878 int total_save_slots = 6 * VMRegImpl::slots_per_word; // 6 arguments passed in registers |
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1879 if (is_critical_native) { |
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1880 // Critical natives may have to call out so they need a save area |
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1881 // for register arguments. |
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1882 int double_slots = 0; |
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1883 int single_slots = 0; |
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1884 for ( int i = 0; i < total_in_args; i++) { |
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1885 if (in_regs[i].first()->is_Register()) { |
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1886 const Register reg = in_regs[i].first()->as_Register(); |
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1887 switch (in_sig_bt[i]) { |
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1888 case T_BOOLEAN: |
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1889 case T_BYTE: |
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1890 case T_SHORT: |
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1891 case T_CHAR: |
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1892 case T_INT: single_slots++; break; |
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1893 case T_ARRAY: // specific to LP64 (7145024) |
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1894 case T_LONG: double_slots++; break; |
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1895 default: ShouldNotReachHere(); |
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1896 } |
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1897 } else if (in_regs[i].first()->is_XMMRegister()) { |
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1898 switch (in_sig_bt[i]) { |
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1899 case T_FLOAT: single_slots++; break; |
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1900 case T_DOUBLE: double_slots++; break; |
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1901 default: ShouldNotReachHere(); |
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1902 } |
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1903 } else if (in_regs[i].first()->is_FloatRegister()) { |
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1904 ShouldNotReachHere(); |
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1905 } |
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1906 } |
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1907 total_save_slots = double_slots * 2 + single_slots; |
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1908 // align the save area |
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1909 if (double_slots != 0) { |
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1910 stack_slots = round_to(stack_slots, 2); |
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1911 } |
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1912 } |
0 | 1913 |
1914 int oop_handle_offset = stack_slots; | |
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1915 stack_slots += total_save_slots; |
0 | 1916 |
1917 // Now any space we need for handlizing a klass if static method | |
1918 | |
1919 int klass_slot_offset = 0; | |
1920 int klass_offset = -1; | |
1921 int lock_slot_offset = 0; | |
1922 bool is_static = false; | |
1923 | |
1924 if (method->is_static()) { | |
1925 klass_slot_offset = stack_slots; | |
1926 stack_slots += VMRegImpl::slots_per_word; | |
1927 klass_offset = klass_slot_offset * VMRegImpl::stack_slot_size; | |
1928 is_static = true; | |
1929 } | |
1930 | |
1931 // Plus a lock if needed | |
1932 | |
1933 if (method->is_synchronized()) { | |
1934 lock_slot_offset = stack_slots; | |
1935 stack_slots += VMRegImpl::slots_per_word; | |
1936 } | |
1937 | |
1938 // Now a place (+2) to save return values or temp during shuffling | |
1939 // + 4 for return address (which we own) and saved rbp | |
1940 stack_slots += 6; | |
1941 | |
1942 // Ok The space we have allocated will look like: | |
1943 // | |
1944 // | |
1945 // FP-> | | | |
1946 // |---------------------| | |
1947 // | 2 slots for moves | | |
1948 // |---------------------| | |
1949 // | lock box (if sync) | | |
1950 // |---------------------| <- lock_slot_offset | |
1951 // | klass (if static) | | |
1952 // |---------------------| <- klass_slot_offset | |
1953 // | oopHandle area | | |
1954 // |---------------------| <- oop_handle_offset (6 java arg registers) | |
1955 // | outbound memory | | |
1956 // | based arguments | | |
1957 // | | | |
1958 // |---------------------| | |
1959 // | | | |
1960 // SP-> | out_preserved_slots | | |
1961 // | |
1962 // | |
1963 | |
1964 | |
1965 // Now compute actual number of stack words we need rounding to make | |
1966 // stack properly aligned. | |
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1967 stack_slots = round_to(stack_slots, StackAlignmentInSlots); |
0 | 1968 |
1969 int stack_size = stack_slots * VMRegImpl::stack_slot_size; | |
1970 | |
1971 // First thing make an ic check to see if we should even be here | |
1972 | |
1973 // We are free to use all registers as temps without saving them and | |
1974 // restoring them except rbp. rbp is the only callee save register | |
1975 // as far as the interpreter and the compiler(s) are concerned. | |
1976 | |
1977 | |
1978 const Register ic_reg = rax; | |
1979 const Register receiver = j_rarg0; | |
1980 | |
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1981 Label hit; |
0 | 1982 Label exception_pending; |
1983 | |
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1984 assert_different_registers(ic_reg, receiver, rscratch1); |
0 | 1985 __ verify_oop(receiver); |
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1986 __ load_klass(rscratch1, receiver); |
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1987 __ cmpq(ic_reg, rscratch1); |
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1988 __ jcc(Assembler::equal, hit); |
0 | 1989 |
1990 __ jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub())); | |
1991 | |
1992 // Verified entry point must be aligned | |
1993 __ align(8); | |
1994 | |
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1995 __ bind(hit); |
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1996 |
0 | 1997 int vep_offset = ((intptr_t)__ pc()) - start; |
1998 | |
1999 // The instruction at the verified entry point must be 5 bytes or longer | |
2000 // because it can be patched on the fly by make_non_entrant. The stack bang | |
2001 // instruction fits that requirement. | |
2002 | |
2003 // Generate stack overflow check | |
2004 | |
2005 if (UseStackBanging) { | |
2006 __ bang_stack_with_offset(StackShadowPages*os::vm_page_size()); | |
2007 } else { | |
2008 // need a 5 byte instruction to allow MT safe patching to non-entrant | |
2009 __ fat_nop(); | |
2010 } | |
2011 | |
2012 // Generate a new frame for the wrapper. | |
2013 __ enter(); | |
2014 // -2 because return address is already present and so is saved rbp | |
304 | 2015 __ subptr(rsp, stack_size - 2*wordSize); |
0 | 2016 |
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2017 // Frame is now completed as far as size and linkage. |
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2018 int frame_complete = ((intptr_t)__ pc()) - start; |
0 | 2019 |
2020 #ifdef ASSERT | |
2021 { | |
2022 Label L; | |
304 | 2023 __ mov(rax, rsp); |
605 | 2024 __ andptr(rax, -16); // must be 16 byte boundary (see amd64 ABI) |
304 | 2025 __ cmpptr(rax, rsp); |
0 | 2026 __ jcc(Assembler::equal, L); |
2027 __ stop("improperly aligned stack"); | |
2028 __ bind(L); | |
2029 } | |
2030 #endif /* ASSERT */ | |
2031 | |
2032 | |
2033 // We use r14 as the oop handle for the receiver/klass | |
2034 // It is callee save so it survives the call to native | |
2035 | |
2036 const Register oop_handle_reg = r14; | |
2037 | |
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2038 if (is_critical_native) { |
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2039 check_needs_gc_for_critical_native(masm, stack_slots, total_c_args, total_in_args, |
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2040 oop_handle_offset, oop_maps, in_regs, in_sig_bt); |
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2041 } |
0 | 2042 |
2043 // | |
2044 // We immediately shuffle the arguments so that any vm call we have to | |
2045 // make from here on out (sync slow path, jvmti, etc.) we will have | |
2046 // captured the oops from our caller and have a valid oopMap for | |
2047 // them. | |
2048 | |
2049 // ----------------- | |
2050 // The Grand Shuffle | |
2051 | |
2052 // The Java calling convention is either equal (linux) or denser (win64) than the | |
2053 // c calling convention. However the because of the jni_env argument the c calling | |
2054 // convention always has at least one more (and two for static) arguments than Java. | |
2055 // Therefore if we move the args from java -> c backwards then we will never have | |
2056 // a register->register conflict and we don't have to build a dependency graph | |
2057 // and figure out how to break any cycles. | |
2058 // | |
2059 | |
2060 // Record esp-based slot for receiver on stack for non-static methods | |
2061 int receiver_offset = -1; | |
2062 | |
2063 // This is a trick. We double the stack slots so we can claim | |
2064 // the oops in the caller's frame. Since we are sure to have | |
2065 // more args than the caller doubling is enough to make | |
2066 // sure we can capture all the incoming oop args from the | |
2067 // caller. | |
2068 // | |
2069 OopMap* map = new OopMap(stack_slots * 2, 0 /* arg_slots*/); | |
2070 | |
2071 // Mark location of rbp (someday) | |
2072 // map->set_callee_saved(VMRegImpl::stack2reg( stack_slots - 2), stack_slots * 2, 0, vmreg(rbp)); | |
2073 | |
2074 // Use eax, ebx as temporaries during any memory-memory moves we have to do | |
2075 // All inbound args are referenced based on rbp and all outbound args via rsp. | |
2076 | |
2077 | |
2078 #ifdef ASSERT | |
2079 bool reg_destroyed[RegisterImpl::number_of_registers]; | |
2080 bool freg_destroyed[XMMRegisterImpl::number_of_registers]; | |
2081 for ( int r = 0 ; r < RegisterImpl::number_of_registers ; r++ ) { | |
2082 reg_destroyed[r] = false; | |
2083 } | |
2084 for ( int f = 0 ; f < XMMRegisterImpl::number_of_registers ; f++ ) { | |
2085 freg_destroyed[f] = false; | |
2086 } | |
2087 | |
2088 #endif /* ASSERT */ | |
2089 | |
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2090 // This may iterate in two different directions depending on the |
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2091 // kind of native it is. The reason is that for regular JNI natives |
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2092 // the incoming and outgoing registers are offset upwards and for |
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2093 // critical natives they are offset down. |
5905 | 2094 GrowableArray<int> arg_order(2 * total_in_args); |
2095 VMRegPair tmp_vmreg; | |
2096 tmp_vmreg.set1(rbx->as_VMReg()); | |
2097 | |
2098 if (!is_critical_native) { | |
2099 for (int i = total_in_args - 1, c_arg = total_c_args - 1; i >= 0; i--, c_arg--) { | |
2100 arg_order.push(i); | |
2101 arg_order.push(c_arg); | |
2102 } | |
2103 } else { | |
2104 // Compute a valid move order, using tmp_vmreg to break any cycles | |
2105 ComputeMoveOrder cmo(total_in_args, in_regs, total_c_args, out_regs, in_sig_bt, arg_order, tmp_vmreg); | |
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2106 } |
5905 | 2107 |
2108 int temploc = -1; | |
2109 for (int ai = 0; ai < arg_order.length(); ai += 2) { | |
2110 int i = arg_order.at(ai); | |
2111 int c_arg = arg_order.at(ai + 1); | |
2112 __ block_comment(err_msg("move %d -> %d", i, c_arg)); | |
2113 if (c_arg == -1) { | |
2114 assert(is_critical_native, "should only be required for critical natives"); | |
2115 // This arg needs to be moved to a temporary | |
2116 __ mov(tmp_vmreg.first()->as_Register(), in_regs[i].first()->as_Register()); | |
2117 in_regs[i] = tmp_vmreg; | |
2118 temploc = i; | |
2119 continue; | |
2120 } else if (i == -1) { | |
2121 assert(is_critical_native, "should only be required for critical natives"); | |
2122 // Read from the temporary location | |
2123 assert(temploc != -1, "must be valid"); | |
2124 i = temploc; | |
2125 temploc = -1; | |
2126 } | |
0 | 2127 #ifdef ASSERT |
2128 if (in_regs[i].first()->is_Register()) { | |
2129 assert(!reg_destroyed[in_regs[i].first()->as_Register()->encoding()], "destroyed reg!"); | |
2130 } else if (in_regs[i].first()->is_XMMRegister()) { | |
2131 assert(!freg_destroyed[in_regs[i].first()->as_XMMRegister()->encoding()], "destroyed reg!"); | |
2132 } | |
2133 if (out_regs[c_arg].first()->is_Register()) { | |
2134 reg_destroyed[out_regs[c_arg].first()->as_Register()->encoding()] = true; | |
2135 } else if (out_regs[c_arg].first()->is_XMMRegister()) { | |
2136 freg_destroyed[out_regs[c_arg].first()->as_XMMRegister()->encoding()] = true; | |
2137 } | |
2138 #endif /* ASSERT */ | |
2139 switch (in_sig_bt[i]) { | |
2140 case T_ARRAY: | |
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2141 if (is_critical_native) { |
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2142 unpack_array_argument(masm, in_regs[i], in_elem_bt[i], out_regs[c_arg + 1], out_regs[c_arg]); |
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2143 c_arg++; |
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2144 #ifdef ASSERT |
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2145 if (out_regs[c_arg].first()->is_Register()) { |
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2146 reg_destroyed[out_regs[c_arg].first()->as_Register()->encoding()] = true; |
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2147 } else if (out_regs[c_arg].first()->is_XMMRegister()) { |
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2148 freg_destroyed[out_regs[c_arg].first()->as_XMMRegister()->encoding()] = true; |
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2149 } |
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2150 #endif |
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2151 break; |
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2152 } |
0 | 2153 case T_OBJECT: |
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2154 assert(!is_critical_native, "no oop arguments"); |
0 | 2155 object_move(masm, map, oop_handle_offset, stack_slots, in_regs[i], out_regs[c_arg], |
2156 ((i == 0) && (!is_static)), | |
2157 &receiver_offset); | |
2158 break; | |
2159 case T_VOID: | |
2160 break; | |
2161 | |
2162 case T_FLOAT: | |
2163 float_move(masm, in_regs[i], out_regs[c_arg]); | |
2164 break; | |
2165 | |
2166 case T_DOUBLE: | |
2167 assert( i + 1 < total_in_args && | |
2168 in_sig_bt[i + 1] == T_VOID && | |
2169 out_sig_bt[c_arg+1] == T_VOID, "bad arg list"); | |
2170 double_move(masm, in_regs[i], out_regs[c_arg]); | |
2171 break; | |
2172 | |
2173 case T_LONG : | |
2174 long_move(masm, in_regs[i], out_regs[c_arg]); | |
2175 break; | |
2176 | |
2177 case T_ADDRESS: assert(false, "found T_ADDRESS in java args"); | |
2178 | |
2179 default: | |
2180 move32_64(masm, in_regs[i], out_regs[c_arg]); | |
2181 } | |
2182 } | |
2183 | |
2184 // point c_arg at the first arg that is already loaded in case we | |
2185 // need to spill before we call out | |
5905 | 2186 int c_arg = total_c_args - total_in_args; |
0 | 2187 |
2188 // Pre-load a static method's oop into r14. Used both by locking code and | |
2189 // the normal JNI call code. | |
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2190 if (method->is_static() && !is_critical_native) { |
0 | 2191 |
2192 // load oop into a register | |
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2193 __ movoop(oop_handle_reg, JNIHandles::make_local(method->method_holder()->java_mirror())); |
0 | 2194 |
2195 // Now handlize the static class mirror it's known not-null. | |
304 | 2196 __ movptr(Address(rsp, klass_offset), oop_handle_reg); |
0 | 2197 map->set_oop(VMRegImpl::stack2reg(klass_slot_offset)); |
2198 | |
2199 // Now get the handle | |
304 | 2200 __ lea(oop_handle_reg, Address(rsp, klass_offset)); |
0 | 2201 // store the klass handle as second argument |
304 | 2202 __ movptr(c_rarg1, oop_handle_reg); |
0 | 2203 // and protect the arg if we must spill |
2204 c_arg--; | |
2205 } | |
2206 | |
2207 // Change state to native (we save the return address in the thread, since it might not | |
2208 // be pushed on the stack when we do a a stack traversal). It is enough that the pc() | |
2209 // points into the right code segment. It does not have to be the correct return pc. | |
2210 // We use the same pc/oopMap repeatedly when we call out | |
2211 | |
2212 intptr_t the_pc = (intptr_t) __ pc(); | |
2213 oop_maps->add_gc_map(the_pc - start, map); | |
2214 | |
2215 __ set_last_Java_frame(rsp, noreg, (address)the_pc); | |
2216 | |
2217 | |
2218 // We have all of the arguments setup at this point. We must not touch any register | |
2219 // argument registers at this point (what if we save/restore them there are no oop? | |
2220 | |
2221 { | |
2222 SkipIfEqual skip(masm, &DTraceMethodProbes, false); | |
2223 // protect the args we've loaded | |
2224 save_args(masm, total_c_args, c_arg, out_regs); | |
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2225 __ mov_metadata(c_rarg1, method()); |
0 | 2226 __ call_VM_leaf( |
2227 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_entry), | |
2228 r15_thread, c_rarg1); | |
2229 restore_args(masm, total_c_args, c_arg, out_regs); | |
2230 } | |
2231 | |
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2232 // RedefineClasses() tracing support for obsolete method entry |
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2233 if (RC_TRACE_IN_RANGE(0x00001000, 0x00002000)) { |
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2234 // protect the args we've loaded |
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2235 save_args(masm, total_c_args, c_arg, out_regs); |
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2236 __ mov_metadata(c_rarg1, method()); |
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2237 __ call_VM_leaf( |
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2238 CAST_FROM_FN_PTR(address, SharedRuntime::rc_trace_method_entry), |
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2239 r15_thread, c_rarg1); |
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2240 restore_args(masm, total_c_args, c_arg, out_regs); |
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2241 } |
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2242 |
0 | 2243 // Lock a synchronized method |
2244 | |
2245 // Register definitions used by locking and unlocking | |
2246 | |
2247 const Register swap_reg = rax; // Must use rax for cmpxchg instruction | |
2248 const Register obj_reg = rbx; // Will contain the oop | |
2249 const Register lock_reg = r13; // Address of compiler lock object (BasicLock) | |
2250 const Register old_hdr = r13; // value of old header at unlock time | |
2251 | |
2252 Label slow_path_lock; | |
2253 Label lock_done; | |
2254 | |
2255 if (method->is_synchronized()) { | |
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2256 assert(!is_critical_native, "unhandled"); |
0 | 2257 |
2258 | |
2259 const int mark_word_offset = BasicLock::displaced_header_offset_in_bytes(); | |
2260 | |
2261 // Get the handle (the 2nd argument) | |
304 | 2262 __ mov(oop_handle_reg, c_rarg1); |
0 | 2263 |
2264 // Get address of the box | |
2265 | |
304 | 2266 __ lea(lock_reg, Address(rsp, lock_slot_offset * VMRegImpl::stack_slot_size)); |
0 | 2267 |
2268 // Load the oop from the handle | |
304 | 2269 __ movptr(obj_reg, Address(oop_handle_reg, 0)); |
0 | 2270 |
2271 if (UseBiasedLocking) { | |
2272 __ biased_locking_enter(lock_reg, obj_reg, swap_reg, rscratch1, false, lock_done, &slow_path_lock); | |
2273 } | |
2274 | |
2275 // Load immediate 1 into swap_reg %rax | |
2276 __ movl(swap_reg, 1); | |
2277 | |
2278 // Load (object->mark() | 1) into swap_reg %rax | |
304 | 2279 __ orptr(swap_reg, Address(obj_reg, 0)); |
0 | 2280 |
2281 // Save (object->mark() | 1) into BasicLock's displaced header | |
304 | 2282 __ movptr(Address(lock_reg, mark_word_offset), swap_reg); |
0 | 2283 |
2284 if (os::is_MP()) { | |
2285 __ lock(); | |
2286 } | |
2287 | |
2288 // src -> dest iff dest == rax else rax <- dest | |
304 | 2289 __ cmpxchgptr(lock_reg, Address(obj_reg, 0)); |
0 | 2290 __ jcc(Assembler::equal, lock_done); |
2291 | |
2292 // Hmm should this move to the slow path code area??? | |
2293 | |
2294 // Test if the oopMark is an obvious stack pointer, i.e., | |
2295 // 1) (mark & 3) == 0, and | |
2296 // 2) rsp <= mark < mark + os::pagesize() | |
2297 // These 3 tests can be done by evaluating the following | |
2298 // expression: ((mark - rsp) & (3 - os::vm_page_size())), | |
2299 // assuming both stack pointer and pagesize have their | |
2300 // least significant 2 bits clear. | |
2301 // NOTE: the oopMark is in swap_reg %rax as the result of cmpxchg | |
2302 | |
304 | 2303 __ subptr(swap_reg, rsp); |
2304 __ andptr(swap_reg, 3 - os::vm_page_size()); | |
0 | 2305 |
2306 // Save the test result, for recursive case, the result is zero | |
304 | 2307 __ movptr(Address(lock_reg, mark_word_offset), swap_reg); |
0 | 2308 __ jcc(Assembler::notEqual, slow_path_lock); |
2309 | |
2310 // Slow path will re-enter here | |
2311 | |
2312 __ bind(lock_done); | |
2313 } | |
2314 | |
2315 | |
2316 // Finally just about ready to make the JNI call | |
2317 | |
2318 | |
2319 // get JNIEnv* which is first argument to native | |
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2320 if (!is_critical_native) { |
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2321 __ lea(c_rarg0, Address(r15_thread, in_bytes(JavaThread::jni_environment_offset()))); |
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2322 } |
0 | 2323 |
2324 // Now set thread in native | |
304 | 2325 __ movl(Address(r15_thread, JavaThread::thread_state_offset()), _thread_in_native); |
0 | 2326 |
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2327 __ call(RuntimeAddress(native_func)); |
0 | 2328 |
2329 // Either restore the MXCSR register after returning from the JNI Call | |
2330 // or verify that it wasn't changed. | |
2331 if (RestoreMXCSROnJNICalls) { | |
304 | 2332 __ ldmxcsr(ExternalAddress(StubRoutines::x86::mxcsr_std())); |
0 | 2333 |
2334 } | |
2335 else if (CheckJNICalls ) { | |
304 | 2336 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, StubRoutines::x86::verify_mxcsr_entry()))); |
0 | 2337 } |
2338 | |
2339 | |
2340 // Unpack native results. | |
2341 switch (ret_type) { | |
2342 case T_BOOLEAN: __ c2bool(rax); break; | |
2343 case T_CHAR : __ movzwl(rax, rax); break; | |
2344 case T_BYTE : __ sign_extend_byte (rax); break; | |
2345 case T_SHORT : __ sign_extend_short(rax); break; | |
2346 case T_INT : /* nothing to do */ break; | |
2347 case T_DOUBLE : | |
2348 case T_FLOAT : | |
2349 // Result is in xmm0 we'll save as needed | |
2350 break; | |
2351 case T_ARRAY: // Really a handle | |
2352 case T_OBJECT: // Really a handle | |
2353 break; // can't de-handlize until after safepoint check | |
2354 case T_VOID: break; | |
2355 case T_LONG: break; | |
2356 default : ShouldNotReachHere(); | |
2357 } | |
2358 | |
2359 // Switch thread to "native transition" state before reading the synchronization state. | |
2360 // This additional state is necessary because reading and testing the synchronization | |
2361 // state is not atomic w.r.t. GC, as this scenario demonstrates: | |
2362 // Java thread A, in _thread_in_native state, loads _not_synchronized and is preempted. | |
2363 // VM thread changes sync state to synchronizing and suspends threads for GC. | |
2364 // Thread A is resumed to finish this native method, but doesn't block here since it | |
2365 // didn't see any synchronization is progress, and escapes. | |
304 | 2366 __ movl(Address(r15_thread, JavaThread::thread_state_offset()), _thread_in_native_trans); |
0 | 2367 |
2368 if(os::is_MP()) { | |
2369 if (UseMembar) { | |
2370 // Force this write out before the read below | |
2371 __ membar(Assembler::Membar_mask_bits( | |
2372 Assembler::LoadLoad | Assembler::LoadStore | | |
2373 Assembler::StoreLoad | Assembler::StoreStore)); | |
2374 } else { | |
2375 // Write serialization page so VM thread can do a pseudo remote membar. | |
2376 // We use the current thread pointer to calculate a thread specific | |
2377 // offset to write to within the page. This minimizes bus traffic | |
2378 // due to cache line collision. | |
2379 __ serialize_memory(r15_thread, rcx); | |
2380 } | |
2381 } | |
2382 | |
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2383 Label after_transition; |
0 | 2384 |
2385 // check for safepoint operation in progress and/or pending suspend requests | |
2386 { | |
2387 Label Continue; | |
2388 | |
2389 __ cmp32(ExternalAddress((address)SafepointSynchronize::address_of_state()), | |
2390 SafepointSynchronize::_not_synchronized); | |
2391 | |
2392 Label L; | |
2393 __ jcc(Assembler::notEqual, L); | |
2394 __ cmpl(Address(r15_thread, JavaThread::suspend_flags_offset()), 0); | |
2395 __ jcc(Assembler::equal, Continue); | |
2396 __ bind(L); | |
2397 | |
2398 // Don't use call_VM as it will see a possible pending exception and forward it | |
2399 // and never return here preventing us from clearing _last_native_pc down below. | |
2400 // Also can't use call_VM_leaf either as it will check to see if rsi & rdi are | |
2401 // preserved and correspond to the bcp/locals pointers. So we do a runtime call | |
2402 // by hand. | |
2403 // | |
2404 save_native_result(masm, ret_type, stack_slots); | |
304 | 2405 __ mov(c_rarg0, r15_thread); |
2406 __ mov(r12, rsp); // remember sp | |
2407 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows | |
2408 __ andptr(rsp, -16); // align stack as required by ABI | |
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2409 if (!is_critical_native) { |
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2410 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans))); |
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2411 } else { |
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2412 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, JavaThread::check_special_condition_for_native_trans_and_transition))); |
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2413 } |
304 | 2414 __ mov(rsp, r12); // restore sp |
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2415 __ reinit_heapbase(); |
0 | 2416 // Restore any method result value |
2417 restore_native_result(masm, ret_type, stack_slots); | |
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2418 |
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2419 if (is_critical_native) { |
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2420 // The call above performed the transition to thread_in_Java so |
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2421 // skip the transition logic below. |
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2422 __ jmpb(after_transition); |
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2423 } |
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2424 |
0 | 2425 __ bind(Continue); |
2426 } | |
2427 | |
2428 // change thread state | |
2429 __ movl(Address(r15_thread, JavaThread::thread_state_offset()), _thread_in_Java); | |
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2430 __ bind(after_transition); |
0 | 2431 |
2432 Label reguard; | |
2433 Label reguard_done; | |
2434 __ cmpl(Address(r15_thread, JavaThread::stack_guard_state_offset()), JavaThread::stack_guard_yellow_disabled); | |
2435 __ jcc(Assembler::equal, reguard); | |
2436 __ bind(reguard_done); | |
2437 | |
2438 // native result if any is live | |
2439 | |
2440 // Unlock | |
2441 Label unlock_done; | |
2442 Label slow_path_unlock; | |
2443 if (method->is_synchronized()) { | |
2444 | |
2445 // Get locked oop from the handle we passed to jni | |
304 | 2446 __ movptr(obj_reg, Address(oop_handle_reg, 0)); |
0 | 2447 |
2448 Label done; | |
2449 | |
2450 if (UseBiasedLocking) { | |
2451 __ biased_locking_exit(obj_reg, old_hdr, done); | |
2452 } | |
2453 | |
2454 // Simple recursive lock? | |
2455 | |
304 | 2456 __ cmpptr(Address(rsp, lock_slot_offset * VMRegImpl::stack_slot_size), (int32_t)NULL_WORD); |
0 | 2457 __ jcc(Assembler::equal, done); |
2458 | |
2459 // Must save rax if if it is live now because cmpxchg must use it | |
2460 if (ret_type != T_FLOAT && ret_type != T_DOUBLE && ret_type != T_VOID) { | |
2461 save_native_result(masm, ret_type, stack_slots); | |
2462 } | |
2463 | |
2464 | |
2465 // get address of the stack lock | |
304 | 2466 __ lea(rax, Address(rsp, lock_slot_offset * VMRegImpl::stack_slot_size)); |
0 | 2467 // get old displaced header |
304 | 2468 __ movptr(old_hdr, Address(rax, 0)); |
0 | 2469 |
2470 // Atomic swap old header if oop still contains the stack lock | |
2471 if (os::is_MP()) { | |
2472 __ lock(); | |
2473 } | |
304 | 2474 __ cmpxchgptr(old_hdr, Address(obj_reg, 0)); |
0 | 2475 __ jcc(Assembler::notEqual, slow_path_unlock); |
2476 | |
2477 // slow path re-enters here | |
2478 __ bind(unlock_done); | |
2479 if (ret_type != T_FLOAT && ret_type != T_DOUBLE && ret_type != T_VOID) { | |
2480 restore_native_result(masm, ret_type, stack_slots); | |
2481 } | |
2482 | |
2483 __ bind(done); | |
2484 | |
2485 } | |
2486 { | |
2487 SkipIfEqual skip(masm, &DTraceMethodProbes, false); | |
2488 save_native_result(masm, ret_type, stack_slots); | |
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2489 __ mov_metadata(c_rarg1, method()); |
0 | 2490 __ call_VM_leaf( |
2491 CAST_FROM_FN_PTR(address, SharedRuntime::dtrace_method_exit), | |
2492 r15_thread, c_rarg1); | |
2493 restore_native_result(masm, ret_type, stack_slots); | |
2494 } | |
2495 | |
2496 __ reset_last_Java_frame(false, true); | |
2497 | |
2498 // Unpack oop result | |
2499 if (ret_type == T_OBJECT || ret_type == T_ARRAY) { | |
2500 Label L; | |
304 | 2501 __ testptr(rax, rax); |
0 | 2502 __ jcc(Assembler::zero, L); |
304 | 2503 __ movptr(rax, Address(rax, 0)); |
0 | 2504 __ bind(L); |
2505 __ verify_oop(rax); | |
2506 } | |
2507 | |
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2508 if (!is_critical_native) { |
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2509 // reset handle block |
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2510 __ movptr(rcx, Address(r15_thread, JavaThread::active_handles_offset())); |
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2511 __ movptr(Address(rcx, JNIHandleBlock::top_offset_in_bytes()), (int32_t)NULL_WORD); |
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2512 } |
0 | 2513 |
2514 // pop our frame | |
2515 | |
2516 __ leave(); | |
2517 | |
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2518 if (!is_critical_native) { |
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2519 // Any exception pending? |
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2520 __ cmpptr(Address(r15_thread, in_bytes(Thread::pending_exception_offset())), (int32_t)NULL_WORD); |
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2521 __ jcc(Assembler::notEqual, exception_pending); |
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2522 } |
0 | 2523 |
2524 // Return | |
2525 | |
2526 __ ret(0); | |
2527 | |
2528 // Unexpected paths are out of line and go here | |
2529 | |
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2530 if (!is_critical_native) { |
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2531 // forward the exception |
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2532 __ bind(exception_pending); |
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2533 |
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2534 // and forward the exception |
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2535 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry())); |
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2536 } |
0 | 2537 |
2538 // Slow path locking & unlocking | |
2539 if (method->is_synchronized()) { | |
2540 | |
2541 // BEGIN Slow path lock | |
2542 __ bind(slow_path_lock); | |
2543 | |
2544 // has last_Java_frame setup. No exceptions so do vanilla call not call_VM | |
2545 // args are (oop obj, BasicLock* lock, JavaThread* thread) | |
2546 | |
2547 // protect the args we've loaded | |
2548 save_args(masm, total_c_args, c_arg, out_regs); | |
2549 | |
304 | 2550 __ mov(c_rarg0, obj_reg); |
2551 __ mov(c_rarg1, lock_reg); | |
2552 __ mov(c_rarg2, r15_thread); | |
0 | 2553 |
2554 // Not a leaf but we have last_Java_frame setup as we want | |
2555 __ call_VM_leaf(CAST_FROM_FN_PTR(address, SharedRuntime::complete_monitor_locking_C), 3); | |
2556 restore_args(masm, total_c_args, c_arg, out_regs); | |
2557 | |
2558 #ifdef ASSERT | |
2559 { Label L; | |
304 | 2560 __ cmpptr(Address(r15_thread, in_bytes(Thread::pending_exception_offset())), (int32_t)NULL_WORD); |
0 | 2561 __ jcc(Assembler::equal, L); |
2562 __ stop("no pending exception allowed on exit from monitorenter"); | |
2563 __ bind(L); | |
2564 } | |
2565 #endif | |
2566 __ jmp(lock_done); | |
2567 | |
2568 // END Slow path lock | |
2569 | |
2570 // BEGIN Slow path unlock | |
2571 __ bind(slow_path_unlock); | |
2572 | |
2573 // If we haven't already saved the native result we must save it now as xmm registers | |
2574 // are still exposed. | |
2575 | |
2576 if (ret_type == T_FLOAT || ret_type == T_DOUBLE ) { | |
2577 save_native_result(masm, ret_type, stack_slots); | |
2578 } | |
2579 | |
304 | 2580 __ lea(c_rarg1, Address(rsp, lock_slot_offset * VMRegImpl::stack_slot_size)); |
2581 | |
2582 __ mov(c_rarg0, obj_reg); | |
2583 __ mov(r12, rsp); // remember sp | |
2584 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows | |
2585 __ andptr(rsp, -16); // align stack as required by ABI | |
0 | 2586 |
2587 // Save pending exception around call to VM (which contains an EXCEPTION_MARK) | |
2588 // NOTE that obj_reg == rbx currently | |
304 | 2589 __ movptr(rbx, Address(r15_thread, in_bytes(Thread::pending_exception_offset()))); |
2590 __ movptr(Address(r15_thread, in_bytes(Thread::pending_exception_offset())), (int32_t)NULL_WORD); | |
0 | 2591 |
2592 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::complete_monitor_unlocking_C))); | |
304 | 2593 __ mov(rsp, r12); // restore sp |
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2594 __ reinit_heapbase(); |
0 | 2595 #ifdef ASSERT |
2596 { | |
2597 Label L; | |
304 | 2598 __ cmpptr(Address(r15_thread, in_bytes(Thread::pending_exception_offset())), (int)NULL_WORD); |
0 | 2599 __ jcc(Assembler::equal, L); |
2600 __ stop("no pending exception allowed on exit complete_monitor_unlocking_C"); | |
2601 __ bind(L); | |
2602 } | |
2603 #endif /* ASSERT */ | |
2604 | |
304 | 2605 __ movptr(Address(r15_thread, in_bytes(Thread::pending_exception_offset())), rbx); |
0 | 2606 |
2607 if (ret_type == T_FLOAT || ret_type == T_DOUBLE ) { | |
2608 restore_native_result(masm, ret_type, stack_slots); | |
2609 } | |
2610 __ jmp(unlock_done); | |
2611 | |
2612 // END Slow path unlock | |
2613 | |
2614 } // synchronized | |
2615 | |
2616 // SLOW PATH Reguard the stack if needed | |
2617 | |
2618 __ bind(reguard); | |
2619 save_native_result(masm, ret_type, stack_slots); | |
304 | 2620 __ mov(r12, rsp); // remember sp |
2621 __ subptr(rsp, frame::arg_reg_save_area_bytes); // windows | |
2622 __ andptr(rsp, -16); // align stack as required by ABI | |
0 | 2623 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, SharedRuntime::reguard_yellow_pages))); |
304 | 2624 __ mov(rsp, r12); // restore sp |
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2625 __ reinit_heapbase(); |
0 | 2626 restore_native_result(masm, ret_type, stack_slots); |
2627 // and continue | |
2628 __ jmp(reguard_done); | |
2629 | |
2630 | |
2631 | |
2632 __ flush(); | |
2633 | |
2634 nmethod *nm = nmethod::new_native_nmethod(method, | |
2405
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2635 compile_id, |
0 | 2636 masm->code(), |
2637 vep_offset, | |
2638 frame_complete, | |
2639 stack_slots / VMRegImpl::slots_per_word, | |
2640 (is_static ? in_ByteSize(klass_offset) : in_ByteSize(receiver_offset)), | |
2641 in_ByteSize(lock_slot_offset*VMRegImpl::stack_slot_size), | |
2642 oop_maps); | |
4873
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2643 |
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2644 if (is_critical_native) { |
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2645 nm->set_lazy_critical_native(true); |
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2646 } |
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2647 |
0 | 2648 return nm; |
2649 | |
2650 } | |
2651 | |
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2652 #ifdef HAVE_DTRACE_H |
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2653 // --------------------------------------------------------------------------- |
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2654 // Generate a dtrace nmethod for a given signature. The method takes arguments |
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2655 // in the Java compiled code convention, marshals them to the native |
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2656 // abi and then leaves nops at the position you would expect to call a native |
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2657 // function. When the probe is enabled the nops are replaced with a trap |
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2658 // instruction that dtrace inserts and the trace will cause a notification |
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2659 // to dtrace. |
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2660 // |
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2661 // The probes are only able to take primitive types and java/lang/String as |
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2662 // arguments. No other java types are allowed. Strings are converted to utf8 |
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2663 // strings so that from dtrace point of view java strings are converted to C |
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2664 // strings. There is an arbitrary fixed limit on the total space that a method |
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2665 // can use for converting the strings. (256 chars per string in the signature). |
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2666 // So any java string larger then this is truncated. |
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2667 |
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2668 static int fp_offset[ConcreteRegisterImpl::number_of_registers] = { 0 }; |
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2669 static bool offsets_initialized = false; |
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2670 |
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2671 |
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2672 nmethod *SharedRuntime::generate_dtrace_nmethod(MacroAssembler *masm, |
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2673 methodHandle method) { |
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2674 |
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2675 |
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2676 // generate_dtrace_nmethod is guarded by a mutex so we are sure to |
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2677 // be single threaded in this method. |
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2678 assert(AdapterHandlerLibrary_lock->owned_by_self(), "must be"); |
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2679 |
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2680 if (!offsets_initialized) { |
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2681 fp_offset[c_rarg0->as_VMReg()->value()] = -1 * wordSize; |
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2682 fp_offset[c_rarg1->as_VMReg()->value()] = -2 * wordSize; |
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2683 fp_offset[c_rarg2->as_VMReg()->value()] = -3 * wordSize; |
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2684 fp_offset[c_rarg3->as_VMReg()->value()] = -4 * wordSize; |
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2685 fp_offset[c_rarg4->as_VMReg()->value()] = -5 * wordSize; |
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2686 fp_offset[c_rarg5->as_VMReg()->value()] = -6 * wordSize; |
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2687 |
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2688 fp_offset[c_farg0->as_VMReg()->value()] = -7 * wordSize; |
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2689 fp_offset[c_farg1->as_VMReg()->value()] = -8 * wordSize; |
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2690 fp_offset[c_farg2->as_VMReg()->value()] = -9 * wordSize; |
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2691 fp_offset[c_farg3->as_VMReg()->value()] = -10 * wordSize; |
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2692 fp_offset[c_farg4->as_VMReg()->value()] = -11 * wordSize; |
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2693 fp_offset[c_farg5->as_VMReg()->value()] = -12 * wordSize; |
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2694 fp_offset[c_farg6->as_VMReg()->value()] = -13 * wordSize; |
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2695 fp_offset[c_farg7->as_VMReg()->value()] = -14 * wordSize; |
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2696 |
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2697 offsets_initialized = true; |
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2698 } |
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2699 // Fill in the signature array, for the calling-convention call. |
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2700 int total_args_passed = method->size_of_parameters(); |
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2701 |
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2702 BasicType* in_sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_args_passed); |
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2703 VMRegPair *in_regs = NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed); |
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2704 |
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2705 // The signature we are going to use for the trap that dtrace will see |
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2706 // java/lang/String is converted. We drop "this" and any other object |
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2707 // is converted to NULL. (A one-slot java/lang/Long object reference |
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2708 // is converted to a two-slot long, which is why we double the allocation). |
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2709 BasicType* out_sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_args_passed * 2); |
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2710 VMRegPair* out_regs = NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed * 2); |
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2711 |
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2712 int i=0; |
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2713 int total_strings = 0; |
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2714 int first_arg_to_pass = 0; |
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2715 int total_c_args = 0; |
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2716 |
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2717 // Skip the receiver as dtrace doesn't want to see it |
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2718 if( !method->is_static() ) { |
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2719 in_sig_bt[i++] = T_OBJECT; |
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2720 first_arg_to_pass = 1; |
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2721 } |
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2722 |
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2723 // We need to convert the java args to where a native (non-jni) function |
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2724 // would expect them. To figure out where they go we convert the java |
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2725 // signature to a C signature. |
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2726 |
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2727 SignatureStream ss(method->signature()); |
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2728 for ( ; !ss.at_return_type(); ss.next()) { |
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2729 BasicType bt = ss.type(); |
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2730 in_sig_bt[i++] = bt; // Collect remaining bits of signature |
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2731 out_sig_bt[total_c_args++] = bt; |
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2732 if( bt == T_OBJECT) { |
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2733 Symbol* s = ss.as_symbol_or_null(); // symbol is created |
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2734 if (s == vmSymbols::java_lang_String()) { |
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2735 total_strings++; |
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2736 out_sig_bt[total_c_args-1] = T_ADDRESS; |
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2737 } else if (s == vmSymbols::java_lang_Boolean() || |
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2738 s == vmSymbols::java_lang_Character() || |
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2739 s == vmSymbols::java_lang_Byte() || |
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2740 s == vmSymbols::java_lang_Short() || |
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2741 s == vmSymbols::java_lang_Integer() || |
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2742 s == vmSymbols::java_lang_Float()) { |
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2743 out_sig_bt[total_c_args-1] = T_INT; |
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2744 } else if (s == vmSymbols::java_lang_Long() || |
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2745 s == vmSymbols::java_lang_Double()) { |
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2746 out_sig_bt[total_c_args-1] = T_LONG; |
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2747 out_sig_bt[total_c_args++] = T_VOID; |
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2748 } |
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2749 } else if ( bt == T_LONG || bt == T_DOUBLE ) { |
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2750 in_sig_bt[i++] = T_VOID; // Longs & doubles take 2 Java slots |
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2751 // We convert double to long |
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2752 out_sig_bt[total_c_args-1] = T_LONG; |
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2753 out_sig_bt[total_c_args++] = T_VOID; |
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2754 } else if ( bt == T_FLOAT) { |
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2755 // We convert float to int |
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2756 out_sig_bt[total_c_args-1] = T_INT; |
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2757 } |
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2758 } |
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2759 |
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2760 assert(i==total_args_passed, "validly parsed signature"); |
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2761 |
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2762 // Now get the compiled-Java layout as input arguments |
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2763 int comp_args_on_stack; |
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2764 comp_args_on_stack = SharedRuntime::java_calling_convention( |
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2765 in_sig_bt, in_regs, total_args_passed, false); |
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2766 |
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2767 // Now figure out where the args must be stored and how much stack space |
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2768 // they require (neglecting out_preserve_stack_slots but space for storing |
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2769 // the 1st six register arguments). It's weird see int_stk_helper. |
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2770 |
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2771 int out_arg_slots; |
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2772 out_arg_slots = c_calling_convention(out_sig_bt, out_regs, total_c_args); |
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2773 |
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2774 // Calculate the total number of stack slots we will need. |
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2775 |
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2776 // First count the abi requirement plus all of the outgoing args |
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2777 int stack_slots = SharedRuntime::out_preserve_stack_slots() + out_arg_slots; |
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2778 |
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2779 // Now space for the string(s) we must convert |
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2780 int* string_locs = NEW_RESOURCE_ARRAY(int, total_strings + 1); |
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2781 for (i = 0; i < total_strings ; i++) { |
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2782 string_locs[i] = stack_slots; |
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2783 stack_slots += max_dtrace_string_size / VMRegImpl::stack_slot_size; |
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2784 } |
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2785 |
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2786 // Plus the temps we might need to juggle register args |
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2787 // regs take two slots each |
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2788 stack_slots += (Argument::n_int_register_parameters_c + |
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2789 Argument::n_float_register_parameters_c) * 2; |
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2790 |
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2791 |
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2792 // + 4 for return address (which we own) and saved rbp, |
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2793 |
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2794 stack_slots += 4; |
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2795 |
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2796 // Ok The space we have allocated will look like: |
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2797 // |
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2798 // |
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2799 // FP-> | | |
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2800 // |---------------------| |
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2801 // | string[n] | |
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2802 // |---------------------| <- string_locs[n] |
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2803 // | string[n-1] | |
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2804 // |---------------------| <- string_locs[n-1] |
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2805 // | ... | |
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2806 // | ... | |
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2807 // |---------------------| <- string_locs[1] |
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2808 // | string[0] | |
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2809 // |---------------------| <- string_locs[0] |
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2810 // | outbound memory | |
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2811 // | based arguments | |
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2812 // | | |
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2813 // |---------------------| |
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2814 // | | |
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2815 // SP-> | out_preserved_slots | |
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2816 // |
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2817 // |
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2818 |
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2819 // Now compute actual number of stack words we need rounding to make |
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2820 // stack properly aligned. |
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2821 stack_slots = round_to(stack_slots, 4 * VMRegImpl::slots_per_word); |
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2822 |
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2823 int stack_size = stack_slots * VMRegImpl::stack_slot_size; |
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2824 |
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2825 intptr_t start = (intptr_t)__ pc(); |
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2826 |
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2827 // First thing make an ic check to see if we should even be here |
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2828 |
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2829 // We are free to use all registers as temps without saving them and |
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2830 // restoring them except rbp. rbp, is the only callee save register |
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2831 // as far as the interpreter and the compiler(s) are concerned. |
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2832 |
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2833 const Register ic_reg = rax; |
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2834 const Register receiver = rcx; |
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2835 Label hit; |
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2836 Label exception_pending; |
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2837 |
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2838 |
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2839 __ verify_oop(receiver); |
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2840 __ cmpl(ic_reg, Address(receiver, oopDesc::klass_offset_in_bytes())); |
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2841 __ jcc(Assembler::equal, hit); |
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2842 |
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2843 __ jump(RuntimeAddress(SharedRuntime::get_ic_miss_stub())); |
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2844 |
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2845 // verified entry must be aligned for code patching. |
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2846 // and the first 5 bytes must be in the same cache line |
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2847 // if we align at 8 then we will be sure 5 bytes are in the same line |
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2848 __ align(8); |
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2849 |
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2850 __ bind(hit); |
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2851 |
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2852 int vep_offset = ((intptr_t)__ pc()) - start; |
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2853 |
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2854 |
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2855 // The instruction at the verified entry point must be 5 bytes or longer |
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2856 // because it can be patched on the fly by make_non_entrant. The stack bang |
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2857 // instruction fits that requirement. |
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2858 |
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2859 // Generate stack overflow check |
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2860 |
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2861 if (UseStackBanging) { |
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2862 if (stack_size <= StackShadowPages*os::vm_page_size()) { |
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2863 __ bang_stack_with_offset(StackShadowPages*os::vm_page_size()); |
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2864 } else { |
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2865 __ movl(rax, stack_size); |
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2866 __ bang_stack_size(rax, rbx); |
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2867 } |
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2868 } else { |
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2869 // need a 5 byte instruction to allow MT safe patching to non-entrant |
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2870 __ fat_nop(); |
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|
2871 } |
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|
2872 |
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2873 assert(((uintptr_t)__ pc() - start - vep_offset) >= 5, |
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2874 "valid size for make_non_entrant"); |
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2875 |
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2876 // Generate a new frame for the wrapper. |
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|
2877 __ enter(); |
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|
2878 |
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2879 // -4 because return address is already present and so is saved rbp, |
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2880 if (stack_size - 2*wordSize != 0) { |
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2881 __ subq(rsp, stack_size - 2*wordSize); |
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2882 } |
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|
2883 |
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2884 // Frame is now completed as far a size and linkage. |
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2885 |
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2886 int frame_complete = ((intptr_t)__ pc()) - start; |
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2887 |
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2888 int c_arg, j_arg; |
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2889 |
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2890 // State of input register args |
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2891 |
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2892 bool live[ConcreteRegisterImpl::number_of_registers]; |
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2893 |
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2894 live[j_rarg0->as_VMReg()->value()] = false; |
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2895 live[j_rarg1->as_VMReg()->value()] = false; |
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2896 live[j_rarg2->as_VMReg()->value()] = false; |
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2897 live[j_rarg3->as_VMReg()->value()] = false; |
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2898 live[j_rarg4->as_VMReg()->value()] = false; |
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2899 live[j_rarg5->as_VMReg()->value()] = false; |
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|
2900 |
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|
2901 live[j_farg0->as_VMReg()->value()] = false; |
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2902 live[j_farg1->as_VMReg()->value()] = false; |
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2903 live[j_farg2->as_VMReg()->value()] = false; |
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2904 live[j_farg3->as_VMReg()->value()] = false; |
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2905 live[j_farg4->as_VMReg()->value()] = false; |
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2906 live[j_farg5->as_VMReg()->value()] = false; |
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2907 live[j_farg6->as_VMReg()->value()] = false; |
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2908 live[j_farg7->as_VMReg()->value()] = false; |
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|
2909 |
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|
2910 |
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|
2911 bool rax_is_zero = false; |
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|
2912 |
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|
2913 // All args (except strings) destined for the stack are moved first |
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2914 for (j_arg = first_arg_to_pass, c_arg = 0 ; |
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2915 j_arg < total_args_passed ; j_arg++, c_arg++ ) { |
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2916 VMRegPair src = in_regs[j_arg]; |
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2917 VMRegPair dst = out_regs[c_arg]; |
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|
2918 |
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|
2919 // Get the real reg value or a dummy (rsp) |
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diff
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|
2920 |
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|
2921 int src_reg = src.first()->is_reg() ? |
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2922 src.first()->value() : |
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|
2923 rsp->as_VMReg()->value(); |
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|
2924 |
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|
2925 bool useless = in_sig_bt[j_arg] == T_ARRAY || |
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|
2926 (in_sig_bt[j_arg] == T_OBJECT && |
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|
2927 out_sig_bt[c_arg] != T_INT && |
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|
2928 out_sig_bt[c_arg] != T_ADDRESS && |
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|
2929 out_sig_bt[c_arg] != T_LONG); |
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|
2930 |
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|
2931 live[src_reg] = !useless; |
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|
2932 |
018d5b58dd4f
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|
2933 if (dst.first()->is_stack()) { |
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diff
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|
2934 |
018d5b58dd4f
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|
2935 // Even though a string arg in a register is still live after this loop |
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|
2936 // after the string conversion loop (next) it will be dead so we take |
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|
2937 // advantage of that now for simpler code to manage live. |
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diff
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|
2938 |
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|
2939 live[src_reg] = false; |
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|
2940 switch (in_sig_bt[j_arg]) { |
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113
diff
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|
2941 |
018d5b58dd4f
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kamg
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113
diff
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|
2942 case T_ARRAY: |
018d5b58dd4f
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kamg
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113
diff
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|
2943 case T_OBJECT: |
018d5b58dd4f
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kamg
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diff
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|
2944 { |
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|
2945 Address stack_dst(rsp, reg2offset_out(dst.first())); |
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kamg
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diff
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|
2946 |
018d5b58dd4f
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|
2947 if (out_sig_bt[c_arg] == T_INT || out_sig_bt[c_arg] == T_LONG) { |
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|
2948 // need to unbox a one-word value |
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|
2949 Register in_reg = rax; |
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|
2950 if ( src.first()->is_reg() ) { |
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|
2951 in_reg = src.first()->as_Register(); |
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diff
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|
2952 } else { |
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diff
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|
2953 __ movq(rax, Address(rbp, reg2offset_in(src.first()))); |
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|
2954 rax_is_zero = false; |
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diff
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|
2955 } |
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diff
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|
2956 Label skipUnbox; |
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diff
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|
2957 __ movptr(Address(rsp, reg2offset_out(dst.first())), |
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|
2958 (int32_t)NULL_WORD); |
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|
2959 __ testq(in_reg, in_reg); |
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|
2960 __ jcc(Assembler::zero, skipUnbox); |
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113
diff
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|
2961 |
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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|
2962 BasicType bt = out_sig_bt[c_arg]; |
437d03ea40b1
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116
diff
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|
2963 int box_offset = java_lang_boxing_object::value_offset_in_bytes(bt); |
116
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|
2964 Address src1(in_reg, box_offset); |
165
437d03ea40b1
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|
2965 if ( bt == T_LONG ) { |
116
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|
2966 __ movq(in_reg, src1); |
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|
2967 __ movq(stack_dst, in_reg); |
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|
2968 assert(out_sig_bt[c_arg+1] == T_VOID, "must be"); |
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|
2969 ++c_arg; // skip over T_VOID to keep the loop indices in sync |
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|
2970 } else { |
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|
2971 __ movl(in_reg, src1); |
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|
2972 __ movl(stack_dst, in_reg); |
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113
diff
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|
2973 } |
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113
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|
2974 |
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|
2975 __ bind(skipUnbox); |
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|
2976 } else if (out_sig_bt[c_arg] != T_ADDRESS) { |
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|
2977 // Convert the arg to NULL |
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|
2978 if (!rax_is_zero) { |
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|
2979 __ xorq(rax, rax); |
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|
2980 rax_is_zero = true; |
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|
2981 } |
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|
2982 __ movq(stack_dst, rax); |
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113
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|
2983 } |
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|
2984 } |
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diff
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|
2985 break; |
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113
diff
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|
2986 |
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|
2987 case T_VOID: |
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|
2988 break; |
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113
diff
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|
2989 |
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|
2990 case T_FLOAT: |
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|
2991 // This does the right thing since we know it is destined for the |
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|
2992 // stack |
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|
2993 float_move(masm, src, dst); |
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|
2994 break; |
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kamg
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113
diff
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|
2995 |
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|
2996 case T_DOUBLE: |
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|
2997 // This does the right thing since we know it is destined for the |
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|
2998 // stack |
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|
2999 double_move(masm, src, dst); |
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|
3000 break; |
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|
3001 |
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|
3002 case T_LONG : |
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|
3003 long_move(masm, src, dst); |
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|
3004 break; |
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diff
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|
3005 |
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|
3006 case T_ADDRESS: assert(false, "found T_ADDRESS in java args"); |
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|
3007 |
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|
3008 default: |
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|
3009 move32_64(masm, src, dst); |
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diff
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|
3010 } |
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diff
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|
3011 } |
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113
diff
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|
3012 |
018d5b58dd4f
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diff
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|
3013 } |
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113
diff
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|
3014 |
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6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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113
diff
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|
3015 // If we have any strings we must store any register based arg to the stack |
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|
3016 // This includes any still live xmm registers too. |
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113
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|
3017 |
018d5b58dd4f
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113
diff
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|
3018 int sid = 0; |
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113
diff
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|
3019 |
018d5b58dd4f
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113
diff
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|
3020 if (total_strings > 0 ) { |
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|
3021 for (j_arg = first_arg_to_pass, c_arg = 0 ; |
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|
3022 j_arg < total_args_passed ; j_arg++, c_arg++ ) { |
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|
3023 VMRegPair src = in_regs[j_arg]; |
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|
3024 VMRegPair dst = out_regs[c_arg]; |
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113
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|
3025 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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113
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|
3026 if (src.first()->is_reg()) { |
018d5b58dd4f
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|
3027 Address src_tmp(rbp, fp_offset[src.first()->value()]); |
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kamg
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113
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|
3028 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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113
diff
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|
3029 // string oops were left untouched by the previous loop even if the |
018d5b58dd4f
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|
3030 // eventual (converted) arg is destined for the stack so park them |
018d5b58dd4f
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|
3031 // away now (except for first) |
018d5b58dd4f
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113
diff
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|
3032 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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113
diff
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|
3033 if (out_sig_bt[c_arg] == T_ADDRESS) { |
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kamg
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113
diff
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|
3034 Address utf8_addr = Address( |
018d5b58dd4f
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113
diff
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|
3035 rsp, string_locs[sid++] * VMRegImpl::stack_slot_size); |
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kamg
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|
3036 if (sid != 1) { |
018d5b58dd4f
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113
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|
3037 // The first string arg won't be killed until after the utf8 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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113
diff
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|
3038 // conversion |
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6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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diff
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|
3039 __ movq(utf8_addr, src.first()->as_Register()); |
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kamg
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113
diff
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|
3040 } |
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113
diff
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|
3041 } else if (dst.first()->is_reg()) { |
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|
3042 if (in_sig_bt[j_arg] == T_FLOAT || in_sig_bt[j_arg] == T_DOUBLE) { |
018d5b58dd4f
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parents:
113
diff
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|
3043 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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113
diff
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|
3044 // Convert the xmm register to an int and store it in the reserved |
018d5b58dd4f
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kamg
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113
diff
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|
3045 // location for the eventual c register arg |
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113
diff
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|
3046 XMMRegister f = src.first()->as_XMMRegister(); |
018d5b58dd4f
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113
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|
3047 if (in_sig_bt[j_arg] == T_FLOAT) { |
018d5b58dd4f
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113
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|
3048 __ movflt(src_tmp, f); |
018d5b58dd4f
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kamg
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113
diff
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|
3049 } else { |
018d5b58dd4f
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113
diff
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|
3050 __ movdbl(src_tmp, f); |
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6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
3051 } |
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kamg
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113
diff
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|
3052 } else { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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113
diff
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|
3053 // If the arg is an oop type we don't support don't bother to store |
018d5b58dd4f
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kamg
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113
diff
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|
3054 // it remember string was handled above. |
018d5b58dd4f
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113
diff
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|
3055 bool useless = in_sig_bt[j_arg] == T_ARRAY || |
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113
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|
3056 (in_sig_bt[j_arg] == T_OBJECT && |
018d5b58dd4f
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113
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|
3057 out_sig_bt[c_arg] != T_INT && |
018d5b58dd4f
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113
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|
3058 out_sig_bt[c_arg] != T_LONG); |
018d5b58dd4f
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kamg
parents:
113
diff
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|
3059 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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113
diff
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|
3060 if (!useless) { |
018d5b58dd4f
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113
diff
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|
3061 __ movq(src_tmp, src.first()->as_Register()); |
018d5b58dd4f
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kamg
parents:
113
diff
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|
3062 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3063 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3064 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3065 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
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|
3066 if (in_sig_bt[j_arg] == T_OBJECT && out_sig_bt[c_arg] == T_LONG) { |
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|
3067 assert(out_sig_bt[c_arg+1] == T_VOID, "must be"); |
018d5b58dd4f
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|
3068 ++c_arg; // skip over T_VOID to keep the loop indices in sync |
018d5b58dd4f
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kamg
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113
diff
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|
3069 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
parents:
113
diff
changeset
|
3070 } |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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
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|
3072 // Now that the volatile registers are safe, convert all the strings |
018d5b58dd4f
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113
diff
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|
3073 sid = 0; |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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113
diff
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|
3074 |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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113
diff
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|
3075 for (j_arg = first_arg_to_pass, c_arg = 0 ; |
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113
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|
3076 j_arg < total_args_passed ; j_arg++, c_arg++ ) { |
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|
3077 if (out_sig_bt[c_arg] == T_ADDRESS) { |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
kamg
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113
diff
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|
3078 // It's a string |
018d5b58dd4f
6537506: Provide a mechanism for specifying Java-level USDT-like dtrace probes
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113
diff
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|
3079 Address utf8_addr = Address( |
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113
diff
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|
3080 rsp, string_locs[sid++] * VMRegImpl::stack_slot_size); |
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113
diff
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|
3081 // The first string we find might still be in the original java arg |
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113
diff
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|
3082 // register |
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113
diff
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|
3083 |
018d5b58dd4f
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|
3084 VMReg src = in_regs[j_arg].first(); |
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113
diff
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|
3085 |
018d5b58dd4f
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113
diff
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|
3086 // We will need to eventually save the final argument to the trap |
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|
3087 // in the von-volatile location dedicated to src. This is the offset |
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|
3088 // from fp we will use. |
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|
3089 int src_off = src->is_reg() ? |
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|
3090 fp_offset[src->value()] : reg2offset_in(src); |
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113
diff
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|
3091 |
018d5b58dd4f
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113
diff
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|
3092 // This is where the argument will eventually reside |
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|
3093 VMRegPair dst = out_regs[c_arg]; |
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113
diff
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|
3094 |
018d5b58dd4f
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113
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|
3095 if (src->is_reg()) { |
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|
3096 if (sid == 1) { |
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|
3097 __ movq(c_rarg0, src->as_Register()); |
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113
diff
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|
3098 } else { |
018d5b58dd4f
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|
3099 __ movq(c_rarg0, utf8_addr); |
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kamg
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113
diff
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|
3100 } |
018d5b58dd4f
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113
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|
3101 } else { |
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|
3102 // arg is still in the original location |
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|
3103 __ movq(c_rarg0, Address(rbp, reg2offset_in(src))); |
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|
3104 } |
018d5b58dd4f
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diff
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|
3105 Label done, convert; |
018d5b58dd4f
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113
diff
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|
3106 |
018d5b58dd4f
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|
3107 // see if the oop is NULL |
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|
3108 __ testq(c_rarg0, c_rarg0); |
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3109 __ jcc(Assembler::notEqual, convert); |
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3110 |
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3111 if (dst.first()->is_reg()) { |
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3112 // Save the ptr to utf string in the origina src loc or the tmp |
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3113 // dedicated to it |
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3114 __ movq(Address(rbp, src_off), c_rarg0); |
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3115 } else { |
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3116 __ movq(Address(rsp, reg2offset_out(dst.first())), c_rarg0); |
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3117 } |
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3118 __ jmp(done); |
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|
3119 |
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3120 __ bind(convert); |
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|
3121 |
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3122 __ lea(c_rarg1, utf8_addr); |
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3123 if (dst.first()->is_reg()) { |
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3124 __ movq(Address(rbp, src_off), c_rarg1); |
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3125 } else { |
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3126 __ movq(Address(rsp, reg2offset_out(dst.first())), c_rarg1); |
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|
3127 } |
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3128 // And do the conversion |
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3129 __ call(RuntimeAddress( |
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3130 CAST_FROM_FN_PTR(address, SharedRuntime::get_utf))); |
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3131 |
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3132 __ bind(done); |
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|
3133 } |
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3134 if (in_sig_bt[j_arg] == T_OBJECT && out_sig_bt[c_arg] == T_LONG) { |
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3135 assert(out_sig_bt[c_arg+1] == T_VOID, "must be"); |
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3136 ++c_arg; // skip over T_VOID to keep the loop indices in sync |
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3137 } |
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|
3138 } |
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3139 // The get_utf call killed all the c_arg registers |
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3140 live[c_rarg0->as_VMReg()->value()] = false; |
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3141 live[c_rarg1->as_VMReg()->value()] = false; |
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3142 live[c_rarg2->as_VMReg()->value()] = false; |
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3143 live[c_rarg3->as_VMReg()->value()] = false; |
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3144 live[c_rarg4->as_VMReg()->value()] = false; |
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3145 live[c_rarg5->as_VMReg()->value()] = false; |
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3146 |
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3147 live[c_farg0->as_VMReg()->value()] = false; |
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3148 live[c_farg1->as_VMReg()->value()] = false; |
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3149 live[c_farg2->as_VMReg()->value()] = false; |
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3150 live[c_farg3->as_VMReg()->value()] = false; |
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3151 live[c_farg4->as_VMReg()->value()] = false; |
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3152 live[c_farg5->as_VMReg()->value()] = false; |
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3153 live[c_farg6->as_VMReg()->value()] = false; |
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3154 live[c_farg7->as_VMReg()->value()] = false; |
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3155 } |
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|
3156 |
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3157 // Now we can finally move the register args to their desired locations |
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|
3158 |
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3159 rax_is_zero = false; |
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|
3160 |
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|
3161 for (j_arg = first_arg_to_pass, c_arg = 0 ; |
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3162 j_arg < total_args_passed ; j_arg++, c_arg++ ) { |
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|
3163 |
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|
3164 VMRegPair src = in_regs[j_arg]; |
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3165 VMRegPair dst = out_regs[c_arg]; |
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3166 |
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3167 // Only need to look for args destined for the interger registers (since we |
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3168 // convert float/double args to look like int/long outbound) |
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3169 if (dst.first()->is_reg()) { |
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3170 Register r = dst.first()->as_Register(); |
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|
3171 |
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3172 // Check if the java arg is unsupported and thereofre useless |
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3173 bool useless = in_sig_bt[j_arg] == T_ARRAY || |
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3174 (in_sig_bt[j_arg] == T_OBJECT && |
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|
3175 out_sig_bt[c_arg] != T_INT && |
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|
3176 out_sig_bt[c_arg] != T_ADDRESS && |
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|
3177 out_sig_bt[c_arg] != T_LONG); |
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|
3178 |
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|
3179 |
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|
3180 // If we're going to kill an existing arg save it first |
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3181 if (live[dst.first()->value()]) { |
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3182 // you can't kill yourself |
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3183 if (src.first() != dst.first()) { |
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3184 __ movq(Address(rbp, fp_offset[dst.first()->value()]), r); |
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|
3185 } |
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|
3186 } |
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|
3187 if (src.first()->is_reg()) { |
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3188 if (live[src.first()->value()] ) { |
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3189 if (in_sig_bt[j_arg] == T_FLOAT) { |
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3190 __ movdl(r, src.first()->as_XMMRegister()); |
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3191 } else if (in_sig_bt[j_arg] == T_DOUBLE) { |
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3192 __ movdq(r, src.first()->as_XMMRegister()); |
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3193 } else if (r != src.first()->as_Register()) { |
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3194 if (!useless) { |
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3195 __ movq(r, src.first()->as_Register()); |
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|
3196 } |
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|
3197 } |
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|
3198 } else { |
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3199 // If the arg is an oop type we don't support don't bother to store |
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3200 // it |
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3201 if (!useless) { |
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3202 if (in_sig_bt[j_arg] == T_DOUBLE || |
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3203 in_sig_bt[j_arg] == T_LONG || |
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3204 in_sig_bt[j_arg] == T_OBJECT ) { |
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3205 __ movq(r, Address(rbp, fp_offset[src.first()->value()])); |
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3206 } else { |
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3207 __ movl(r, Address(rbp, fp_offset[src.first()->value()])); |
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3208 } |
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|
3209 } |
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|
3210 } |
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|
3211 live[src.first()->value()] = false; |
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3212 } else if (!useless) { |
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3213 // full sized move even for int should be ok |
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3214 __ movq(r, Address(rbp, reg2offset_in(src.first()))); |
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3215 } |
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|
3216 |
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3217 // At this point r has the original java arg in the final location |
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3218 // (assuming it wasn't useless). If the java arg was an oop |
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3219 // we have a bit more to do |
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|
3220 |
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3221 if (in_sig_bt[j_arg] == T_ARRAY || in_sig_bt[j_arg] == T_OBJECT ) { |
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3222 if (out_sig_bt[c_arg] == T_INT || out_sig_bt[c_arg] == T_LONG) { |
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3223 // need to unbox a one-word value |
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3224 Label skip; |
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3225 __ testq(r, r); |
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3226 __ jcc(Assembler::equal, skip); |
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3227 BasicType bt = out_sig_bt[c_arg]; |
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3228 int box_offset = java_lang_boxing_object::value_offset_in_bytes(bt); |
116
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3229 Address src1(r, box_offset); |
165
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3230 if ( bt == T_LONG ) { |
116
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3231 __ movq(r, src1); |
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3232 } else { |
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3233 __ movl(r, src1); |
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3234 } |
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3235 __ bind(skip); |
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3236 |
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3237 } else if (out_sig_bt[c_arg] != T_ADDRESS) { |
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3238 // Convert the arg to NULL |
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3239 __ xorq(r, r); |
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3240 } |
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3241 } |
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3242 |
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3243 // dst can longer be holding an input value |
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3244 live[dst.first()->value()] = false; |
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3245 } |
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3246 if (in_sig_bt[j_arg] == T_OBJECT && out_sig_bt[c_arg] == T_LONG) { |
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3247 assert(out_sig_bt[c_arg+1] == T_VOID, "must be"); |
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3248 ++c_arg; // skip over T_VOID to keep the loop indices in sync |
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3249 } |
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3250 } |
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3251 |
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3252 |
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3253 // Ok now we are done. Need to place the nop that dtrace wants in order to |
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3254 // patch in the trap |
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3255 int patch_offset = ((intptr_t)__ pc()) - start; |
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3256 |
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3257 __ nop(); |
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3258 |
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3259 |
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3260 // Return |
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3261 |
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3262 __ leave(); |
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3263 __ ret(0); |
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3264 |
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3265 __ flush(); |
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3266 |
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3267 nmethod *nm = nmethod::new_dtrace_nmethod( |
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3268 method, masm->code(), vep_offset, patch_offset, frame_complete, |
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3269 stack_slots / VMRegImpl::slots_per_word); |
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3270 return nm; |
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3271 |
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3272 } |
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3273 |
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3274 #endif // HAVE_DTRACE_H |
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3275 |
0 | 3276 // this function returns the adjust size (in number of words) to a c2i adapter |
3277 // activation for use during deoptimization | |
3278 int Deoptimization::last_frame_adjust(int callee_parameters, int callee_locals ) { | |
1506 | 3279 return (callee_locals - callee_parameters) * Interpreter::stackElementWords; |
0 | 3280 } |
3281 | |
3282 | |
3283 uint SharedRuntime::out_preserve_stack_slots() { | |
3284 return 0; | |
3285 } | |
3286 | |
3287 //------------------------------generate_deopt_blob---------------------------- | |
3288 void SharedRuntime::generate_deopt_blob() { | |
3289 // Allocate space for the code | |
3290 ResourceMark rm; | |
3291 // Setup code generation tools | |
3292 CodeBuffer buffer("deopt_blob", 2048, 1024); | |
3293 MacroAssembler* masm = new MacroAssembler(&buffer); | |
3294 int frame_size_in_words; | |
3295 OopMap* map = NULL; | |
3296 OopMapSet *oop_maps = new OopMapSet(); | |
3297 | |
3298 // ------------- | |
3299 // This code enters when returning to a de-optimized nmethod. A return | |
3300 // address has been pushed on the the stack, and return values are in | |
3301 // registers. | |
3302 // If we are doing a normal deopt then we were called from the patched | |
3303 // nmethod from the point we returned to the nmethod. So the return | |
3304 // address on the stack is wrong by NativeCall::instruction_size | |
3305 // We will adjust the value so it looks like we have the original return | |
3306 // address on the stack (like when we eagerly deoptimized). | |
3307 // In the case of an exception pending when deoptimizing, we enter | |
3308 // with a return address on the stack that points after the call we patched | |
3309 // into the exception handler. We have the following register state from, | |
3310 // e.g., the forward exception stub (see stubGenerator_x86_64.cpp). | |
3311 // rax: exception oop | |
3312 // rbx: exception handler | |
3313 // rdx: throwing pc | |
3314 // So in this case we simply jam rdx into the useless return address and | |
3315 // the stack looks just like we want. | |
3316 // | |
3317 // At this point we need to de-opt. We save the argument return | |
3318 // registers. We call the first C routine, fetch_unroll_info(). This | |
3319 // routine captures the return values and returns a structure which | |
3320 // describes the current frame size and the sizes of all replacement frames. | |
3321 // The current frame is compiled code and may contain many inlined | |
3322 // functions, each with their own JVM state. We pop the current frame, then | |
3323 // push all the new frames. Then we call the C routine unpack_frames() to | |
3324 // populate these frames. Finally unpack_frames() returns us the new target | |
3325 // address. Notice that callee-save registers are BLOWN here; they have | |
3326 // already been captured in the vframeArray at the time the return PC was | |
3327 // patched. | |
3328 address start = __ pc(); | |
3329 Label cont; | |
3330 | |
3331 // Prolog for non exception case! | |
3332 | |
3333 // Save everything in sight. | |
3334 map = RegisterSaver::save_live_registers(masm, 0, &frame_size_in_words); | |
3335 | |
3336 // Normal deoptimization. Save exec mode for unpack_frames. | |
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3337 __ movl(r14, Deoptimization::Unpack_deopt); // callee-saved |
0 | 3338 __ jmp(cont); |
304 | 3339 |
3340 int reexecute_offset = __ pc() - start; | |
3341 | |
3342 // Reexecute case | |
3343 // return address is the pc describes what bci to do re-execute at | |
3344 | |
3345 // No need to update map as each call to save_live_registers will produce identical oopmap | |
3346 (void) RegisterSaver::save_live_registers(masm, 0, &frame_size_in_words); | |
3347 | |
3348 __ movl(r14, Deoptimization::Unpack_reexecute); // callee-saved | |
3349 __ jmp(cont); | |
3350 | |
0 | 3351 int exception_offset = __ pc() - start; |
3352 | |
3353 // Prolog for exception case | |
3354 | |
304 | 3355 // all registers are dead at this entry point, except for rax, and |
3356 // rdx which contain the exception oop and exception pc | |
3357 // respectively. Set them in TLS and fall thru to the | |
3358 // unpack_with_exception_in_tls entry point. | |
3359 | |
3360 __ movptr(Address(r15_thread, JavaThread::exception_pc_offset()), rdx); | |
3361 __ movptr(Address(r15_thread, JavaThread::exception_oop_offset()), rax); | |
3362 | |
3363 int exception_in_tls_offset = __ pc() - start; | |
3364 | |
3365 // new implementation because exception oop is now passed in JavaThread | |
3366 | |
3367 // Prolog for exception case | |
3368 // All registers must be preserved because they might be used by LinearScan | |
3369 // Exceptiop oop and throwing PC are passed in JavaThread | |
3370 // tos: stack at point of call to method that threw the exception (i.e. only | |
3371 // args are on the stack, no return address) | |
3372 | |
3373 // make room on stack for the return address | |
3374 // It will be patched later with the throwing pc. The correct value is not | |
3375 // available now because loading it from memory would destroy registers. | |
3376 __ push(0); | |
0 | 3377 |
3378 // Save everything in sight. | |
3379 map = RegisterSaver::save_live_registers(masm, 0, &frame_size_in_words); | |
3380 | |
304 | 3381 // Now it is safe to overwrite any register |
3382 | |
0 | 3383 // Deopt during an exception. Save exec mode for unpack_frames. |
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3384 __ movl(r14, Deoptimization::Unpack_exception); // callee-saved |
0 | 3385 |
304 | 3386 // load throwing pc from JavaThread and patch it as the return address |
3387 // of the current frame. Then clear the field in JavaThread | |
3388 | |
3389 __ movptr(rdx, Address(r15_thread, JavaThread::exception_pc_offset())); | |
3390 __ movptr(Address(rbp, wordSize), rdx); | |
3391 __ movptr(Address(r15_thread, JavaThread::exception_pc_offset()), (int32_t)NULL_WORD); | |
3392 | |
3393 #ifdef ASSERT | |
3394 // verify that there is really an exception oop in JavaThread | |
3395 __ movptr(rax, Address(r15_thread, JavaThread::exception_oop_offset())); | |
3396 __ verify_oop(rax); | |
3397 | |
3398 // verify that there is no pending exception | |
3399 Label no_pending_exception; | |
3400 __ movptr(rax, Address(r15_thread, Thread::pending_exception_offset())); | |
3401 __ testptr(rax, rax); | |
3402 __ jcc(Assembler::zero, no_pending_exception); | |
3403 __ stop("must not have pending exception here"); | |
3404 __ bind(no_pending_exception); | |
3405 #endif | |
3406 | |
4984
5c41e7002923
Added missing #ifdef GRAAL
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4979
diff
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|
3407 #ifdef GRAAL |
2059
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diff
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|
3408 __ jmp(cont); |
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diff
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|
3409 |
5111
422c979ff392
fixed two cases where DeoptAction was invalid
Christian Haeubl <christian.haeubl@oracle.com>
parents:
5109
diff
changeset
|
3410 int implicit_exception_uncommon_trap_offset = __ pc() - start; |
8337
37977d1dcedc
Transmit deoptimization reason in thread local.
Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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8151
diff
changeset
|
3411 // pc where the exception happened is in ScratchA |
2605
98fa88528319
Deopt on implicit null pointer exception.
Thomas Wuerthinger <thomas@wuerthinger.net>
parents:
2491
diff
changeset
|
3412 __ pushptr(Address(r15_thread, in_bytes(JavaThread::ScratchA_offset()))); |
98fa88528319
Deopt on implicit null pointer exception.
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2491
diff
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|
3413 |
2059
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diff
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|
3414 int uncommon_trap_offset = __ pc() - start; |
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diff
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|
3415 |
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diff
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|
3416 // Save everything in sight. |
4675
c2384f5b2e6e
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diff
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|
3417 RegisterSaver::save_live_registers(masm, 0, &frame_size_in_words); |
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diff
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|
3418 // fetch_unroll_info needs to call last_java_frame() |
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diff
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|
3419 __ set_last_Java_frame(noreg, noreg, NULL); |
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diff
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|
3420 |
8337
37977d1dcedc
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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8151
diff
changeset
|
3421 __ movl(c_rarg1, Address(r15_thread, in_bytes(ThreadShadow::pending_deoptimization_offset()))); |
8363
25691fcb505a
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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8337
diff
changeset
|
3422 __ movl(Address(r15_thread, in_bytes(ThreadShadow::pending_deoptimization_offset())), -1); |
5109
6766253384bf
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Christian Haeubl <christian.haeubl@oracle.com>
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4993
diff
changeset
|
3423 |
2928
1e13559b112d
small fix in deopt stub, more branch prediction code
Lukas Stadler <lukas.stadler@jku.at>
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2891
diff
changeset
|
3424 __ movl(r14, (int32_t)Deoptimization::Unpack_reexecute); |
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diff
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|
3425 __ mov(c_rarg0, r15_thread); |
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diff
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|
3426 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, Deoptimization::uncommon_trap))); |
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diff
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|
3427 oop_maps->add_gc_map( __ pc()-start, map->deep_copy()); |
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diff
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|
3428 |
9508a52cbd32
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diff
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|
3429 __ reset_last_Java_frame(false, false); |
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diff
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|
3430 |
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diff
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|
3431 Label after_fetch_unroll_info_call; |
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diff
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|
3432 __ jmp(after_fetch_unroll_info_call); |
5109
6766253384bf
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|
3433 #endif // GRAAL |
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diff
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|
3434 |
0 | 3435 __ bind(cont); |
3436 | |
3437 // Call C code. Need thread and this frame, but NOT official VM entry | |
3438 // crud. We cannot block on this call, no GC can happen. | |
3439 // | |
3440 // UnrollBlock* fetch_unroll_info(JavaThread* thread) | |
3441 | |
3442 // fetch_unroll_info needs to call last_java_frame(). | |
3443 | |
3444 __ set_last_Java_frame(noreg, noreg, NULL); | |
3445 #ifdef ASSERT | |
3446 { Label L; | |
304 | 3447 __ cmpptr(Address(r15_thread, |
0 | 3448 JavaThread::last_Java_fp_offset()), |
304 | 3449 (int32_t)0); |
0 | 3450 __ jcc(Assembler::equal, L); |
3451 __ stop("SharedRuntime::generate_deopt_blob: last_Java_fp not cleared"); | |
3452 __ bind(L); | |
3453 } | |
3454 #endif // ASSERT | |
304 | 3455 __ mov(c_rarg0, r15_thread); |
0 | 3456 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, Deoptimization::fetch_unroll_info))); |
3457 | |
3458 // Need to have an oopmap that tells fetch_unroll_info where to | |
3459 // find any register it might need. | |
3460 oop_maps->add_gc_map(__ pc() - start, map); | |
3461 | |
3462 __ reset_last_Java_frame(false, false); | |
3463 | |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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diff
changeset
|
3464 #ifdef GRAAL |
2059
9508a52cbd32
Add deoptimization blob support.
Thomas Wuerthinger <wuerthinger@ssw.jku.at>
parents:
1972
diff
changeset
|
3465 __ bind(after_fetch_unroll_info_call); |
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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diff
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|
3466 #endif |
2059
9508a52cbd32
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Thomas Wuerthinger <wuerthinger@ssw.jku.at>
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diff
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|
3467 |
0 | 3468 // Load UnrollBlock* into rdi |
304 | 3469 __ mov(rdi, rax); |
3470 | |
3471 Label noException; | |
682
69aefafe69c1
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never
parents:
628
diff
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|
3472 __ cmpl(r14, Deoptimization::Unpack_exception); // Was exception pending? |
304 | 3473 __ jcc(Assembler::notEqual, noException); |
3474 __ movptr(rax, Address(r15_thread, JavaThread::exception_oop_offset())); | |
3475 // QQQ this is useless it was NULL above | |
3476 __ movptr(rdx, Address(r15_thread, JavaThread::exception_pc_offset())); | |
3477 __ movptr(Address(r15_thread, JavaThread::exception_oop_offset()), (int32_t)NULL_WORD); | |
3478 __ movptr(Address(r15_thread, JavaThread::exception_pc_offset()), (int32_t)NULL_WORD); | |
3479 | |
3480 __ verify_oop(rax); | |
3481 | |
3482 // Overwrite the result registers with the exception results. | |
3483 __ movptr(Address(rsp, RegisterSaver::rax_offset_in_bytes()), rax); | |
3484 // I think this is useless | |
3485 __ movptr(Address(rsp, RegisterSaver::rdx_offset_in_bytes()), rdx); | |
3486 | |
3487 __ bind(noException); | |
0 | 3488 |
3489 // Only register save data is on the stack. | |
3490 // Now restore the result registers. Everything else is either dead | |
3491 // or captured in the vframeArray. | |
3492 RegisterSaver::restore_result_registers(masm); | |
3493 | |
3494 // All of the register save area has been popped of the stack. Only the | |
3495 // return address remains. | |
3496 | |
3497 // Pop all the frames we must move/replace. | |
3498 // | |
3499 // Frame picture (youngest to oldest) | |
3500 // 1: self-frame (no frame link) | |
3501 // 2: deopting frame (no frame link) | |
3502 // 3: caller of deopting frame (could be compiled/interpreted). | |
3503 // | |
3504 // Note: by leaving the return address of self-frame on the stack | |
3505 // and using the size of frame 2 to adjust the stack | |
3506 // when we are done the return to frame 3 will still be on the stack. | |
3507 | |
3508 // Pop deoptimized frame | |
3509 __ movl(rcx, Address(rdi, Deoptimization::UnrollBlock::size_of_deoptimized_frame_offset_in_bytes())); | |
304 | 3510 __ addptr(rsp, rcx); |
0 | 3511 |
3512 // rsp should be pointing at the return address to the caller (3) | |
3513 | |
3514 // Stack bang to make sure there's enough room for these interpreter frames. | |
3515 if (UseStackBanging) { | |
3516 __ movl(rbx, Address(rdi, Deoptimization::UnrollBlock::total_frame_sizes_offset_in_bytes())); | |
3517 __ bang_stack_size(rbx, rcx); | |
3518 } | |
3519 | |
3520 // Load address of array of frame pcs into rcx | |
304 | 3521 __ movptr(rcx, Address(rdi, Deoptimization::UnrollBlock::frame_pcs_offset_in_bytes())); |
0 | 3522 |
3523 // Trash the old pc | |
304 | 3524 __ addptr(rsp, wordSize); |
0 | 3525 |
3526 // Load address of array of frame sizes into rsi | |
304 | 3527 __ movptr(rsi, Address(rdi, Deoptimization::UnrollBlock::frame_sizes_offset_in_bytes())); |
0 | 3528 |
3529 // Load counter into rdx | |
3530 __ movl(rdx, Address(rdi, Deoptimization::UnrollBlock::number_of_frames_offset_in_bytes())); | |
3531 | |
3532 // Pick up the initial fp we should save | |
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|
3533 __ movptr(rbp, Address(rdi, Deoptimization::UnrollBlock::initial_info_offset_in_bytes())); |
0 | 3534 |
3535 // Now adjust the caller's stack to make up for the extra locals | |
3536 // but record the original sp so that we can save it in the skeletal interpreter | |
3537 // frame and the stack walking of interpreter_sender will get the unextended sp | |
3538 // value and not the "real" sp value. | |
3539 | |
3540 const Register sender_sp = r8; | |
3541 | |
304 | 3542 __ mov(sender_sp, rsp); |
0 | 3543 __ movl(rbx, Address(rdi, |
3544 Deoptimization::UnrollBlock:: | |
3545 caller_adjustment_offset_in_bytes())); | |
304 | 3546 __ subptr(rsp, rbx); |
0 | 3547 |
3548 // Push interpreter frames in a loop | |
3549 Label loop; | |
3550 __ bind(loop); | |
304 | 3551 __ movptr(rbx, Address(rsi, 0)); // Load frame size |
3552 #ifdef CC_INTERP | |
3553 __ subptr(rbx, 4*wordSize); // we'll push pc and ebp by hand and | |
3554 #ifdef ASSERT | |
3555 __ push(0xDEADDEAD); // Make a recognizable pattern | |
3556 __ push(0xDEADDEAD); | |
3557 #else /* ASSERT */ | |
3558 __ subptr(rsp, 2*wordSize); // skip the "static long no_param" | |
3559 #endif /* ASSERT */ | |
3560 #else | |
3561 __ subptr(rbx, 2*wordSize); // We'll push pc and ebp by hand | |
3562 #endif // CC_INTERP | |
3563 __ pushptr(Address(rcx, 0)); // Save return address | |
0 | 3564 __ enter(); // Save old & set new ebp |
304 | 3565 __ subptr(rsp, rbx); // Prolog |
3566 #ifdef CC_INTERP | |
3567 __ movptr(Address(rbp, | |
3568 -(sizeof(BytecodeInterpreter)) + in_bytes(byte_offset_of(BytecodeInterpreter, _sender_sp))), | |
3569 sender_sp); // Make it walkable | |
3570 #else /* CC_INTERP */ | |
0 | 3571 // This value is corrected by layout_activation_impl |
304 | 3572 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD ); |
3573 __ movptr(Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize), sender_sp); // Make it walkable | |
3574 #endif /* CC_INTERP */ | |
3575 __ mov(sender_sp, rsp); // Pass sender_sp to next frame | |
3576 __ addptr(rsi, wordSize); // Bump array pointer (sizes) | |
3577 __ addptr(rcx, wordSize); // Bump array pointer (pcs) | |
0 | 3578 __ decrementl(rdx); // Decrement counter |
3579 __ jcc(Assembler::notZero, loop); | |
304 | 3580 __ pushptr(Address(rcx, 0)); // Save final return address |
0 | 3581 |
3582 // Re-push self-frame | |
3583 __ enter(); // Save old & set new ebp | |
3584 | |
3585 // Allocate a full sized register save area. | |
3586 // Return address and rbp are in place, so we allocate two less words. | |
304 | 3587 __ subptr(rsp, (frame_size_in_words - 2) * wordSize); |
0 | 3588 |
3589 // Restore frame locals after moving the frame | |
3590 __ movdbl(Address(rsp, RegisterSaver::xmm0_offset_in_bytes()), xmm0); | |
304 | 3591 __ movptr(Address(rsp, RegisterSaver::rax_offset_in_bytes()), rax); |
0 | 3592 |
3593 // Call C code. Need thread but NOT official VM entry | |
3594 // crud. We cannot block on this call, no GC can happen. Call should | |
3595 // restore return values to their stack-slots with the new SP. | |
3596 // | |
3597 // void Deoptimization::unpack_frames(JavaThread* thread, int exec_mode) | |
3598 | |
3599 // Use rbp because the frames look interpreted now | |
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6636110: unaligned stackpointer leads to crash during deoptimization
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3931
diff
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|
3600 // 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
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|
3601 // 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
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3931
diff
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|
3602 address the_pc = __ pc(); |
1feb272af3a7
6636110: unaligned stackpointer leads to crash during deoptimization
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|
3603 __ set_last_Java_frame(noreg, rbp, the_pc); |
1feb272af3a7
6636110: unaligned stackpointer leads to crash during deoptimization
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|
3604 |
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6636110: unaligned stackpointer leads to crash during deoptimization
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|
3605 __ andptr(rsp, -(StackAlignmentInBytes)); // Fix stack alignment as required by ABI |
304 | 3606 __ mov(c_rarg0, r15_thread); |
113
ba764ed4b6f2
6420645: Create a vm that uses compressed oops for up to 32gb heapsizes
coleenp
parents:
0
diff
changeset
|
3607 __ movl(c_rarg1, r14); // second arg: exec_mode |
0 | 3608 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, Deoptimization::unpack_frames))); |
4057
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|
3609 // 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
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diff
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|
3610 __ movptr(rsp, Address(r15_thread, JavaThread::last_Java_sp_offset())); |
0 | 3611 |
3612 // Set an oopmap for the call site | |
4057
1feb272af3a7
6636110: unaligned stackpointer leads to crash during deoptimization
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3931
diff
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|
3613 // Use the same PC we used for the last java frame |
1feb272af3a7
6636110: unaligned stackpointer leads to crash during deoptimization
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diff
changeset
|
3614 oop_maps->add_gc_map(the_pc - start, |
0 | 3615 new OopMap( frame_size_in_words, 0 )); |
3616 | |
4057
1feb272af3a7
6636110: unaligned stackpointer leads to crash during deoptimization
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|
3617 // Clear fp AND pc |
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diff
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|
3618 __ reset_last_Java_frame(true, true); |
0 | 3619 |
3620 // Collect return values | |
3621 __ movdbl(xmm0, Address(rsp, RegisterSaver::xmm0_offset_in_bytes())); | |
304 | 3622 __ movptr(rax, Address(rsp, RegisterSaver::rax_offset_in_bytes())); |
3623 // I think this is useless (throwing pc?) | |
3624 __ movptr(rdx, Address(rsp, RegisterSaver::rdx_offset_in_bytes())); | |
0 | 3625 |
3626 // Pop self-frame. | |
3627 __ leave(); // Epilog | |
3628 | |
3629 // Jump to interpreter | |
3630 __ ret(0); | |
3631 | |
3632 // Make sure all code is generated | |
3633 masm->flush(); | |
3634 | |
304 | 3635 _deopt_blob = DeoptimizationBlob::create(&buffer, oop_maps, 0, exception_offset, reexecute_offset, frame_size_in_words); |
3636 _deopt_blob->set_unpack_with_exception_in_tls_offset(exception_in_tls_offset); | |
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0d2a2797a61f
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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diff
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|
3637 #ifdef GRAAL |
2059
9508a52cbd32
Add deoptimization blob support.
Thomas Wuerthinger <wuerthinger@ssw.jku.at>
parents:
1972
diff
changeset
|
3638 _deopt_blob->set_uncommon_trap_offset(uncommon_trap_offset); |
5111
422c979ff392
fixed two cases where DeoptAction was invalid
Christian Haeubl <christian.haeubl@oracle.com>
parents:
5109
diff
changeset
|
3639 _deopt_blob->set_implicit_exception_uncommon_trap_offset(implicit_exception_uncommon_trap_offset); |
4985
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Thomas Wuerthinger <thomas.wuerthinger@oracle.com>
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4984
diff
changeset
|
3640 #endif |
0 | 3641 } |
3642 | |
3643 #ifdef COMPILER2 | |
3644 //------------------------------generate_uncommon_trap_blob-------------------- | |
3645 void SharedRuntime::generate_uncommon_trap_blob() { | |
3646 // Allocate space for the code | |
3647 ResourceMark rm; | |
3648 // Setup code generation tools | |
3649 CodeBuffer buffer("uncommon_trap_blob", 2048, 1024); | |
3650 MacroAssembler* masm = new MacroAssembler(&buffer); | |
3651 | |
3652 assert(SimpleRuntimeFrame::framesize % 4 == 0, "sp not 16-byte aligned"); | |
3653 | |
3654 address start = __ pc(); | |
3655 | |
3656 // Push self-frame. We get here with a return address on the | |
3657 // stack, so rsp is 8-byte aligned until we allocate our frame. | |
304 | 3658 __ subptr(rsp, SimpleRuntimeFrame::return_off << LogBytesPerInt); // Epilog! |
0 | 3659 |
3660 // No callee saved registers. rbp is assumed implicitly saved | |
304 | 3661 __ movptr(Address(rsp, SimpleRuntimeFrame::rbp_off << LogBytesPerInt), rbp); |
0 | 3662 |
3663 // compiler left unloaded_class_index in j_rarg0 move to where the | |
3664 // runtime expects it. | |
3665 __ movl(c_rarg1, j_rarg0); | |
3666 | |
3667 __ set_last_Java_frame(noreg, noreg, NULL); | |
3668 | |
3669 // Call C code. Need thread but NOT official VM entry | |
3670 // crud. We cannot block on this call, no GC can happen. Call should | |
3671 // capture callee-saved registers as well as return values. | |
3672 // Thread is in rdi already. | |
3673 // | |
3674 // UnrollBlock* uncommon_trap(JavaThread* thread, jint unloaded_class_index); | |
3675 | |
304 | 3676 __ mov(c_rarg0, r15_thread); |
0 | 3677 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, Deoptimization::uncommon_trap))); |
3678 | |
3679 // Set an oopmap for the call site | |
3680 OopMapSet* oop_maps = new OopMapSet(); | |
3681 OopMap* map = new OopMap(SimpleRuntimeFrame::framesize, 0); | |
3682 | |
3683 // location of rbp is known implicitly by the frame sender code | |
3684 | |
3685 oop_maps->add_gc_map(__ pc() - start, map); | |
3686 | |
3687 __ reset_last_Java_frame(false, false); | |
3688 | |
3689 // Load UnrollBlock* into rdi | |
304 | 3690 __ mov(rdi, rax); |
0 | 3691 |
3692 // Pop all the frames we must move/replace. | |
3693 // | |
3694 // Frame picture (youngest to oldest) | |
3695 // 1: self-frame (no frame link) | |
3696 // 2: deopting frame (no frame link) | |
3697 // 3: caller of deopting frame (could be compiled/interpreted). | |
3698 | |
3699 // Pop self-frame. We have no frame, and must rely only on rax and rsp. | |
304 | 3700 __ addptr(rsp, (SimpleRuntimeFrame::framesize - 2) << LogBytesPerInt); // Epilog! |
0 | 3701 |
3702 // Pop deoptimized frame (int) | |
3703 __ movl(rcx, Address(rdi, | |
3704 Deoptimization::UnrollBlock:: | |
3705 size_of_deoptimized_frame_offset_in_bytes())); | |
304 | 3706 __ addptr(rsp, rcx); |
0 | 3707 |
3708 // rsp should be pointing at the return address to the caller (3) | |
3709 | |
3710 // Stack bang to make sure there's enough room for these interpreter frames. | |
3711 if (UseStackBanging) { | |
3712 __ movl(rbx, Address(rdi ,Deoptimization::UnrollBlock::total_frame_sizes_offset_in_bytes())); | |
3713 __ bang_stack_size(rbx, rcx); | |
3714 } | |
3715 | |
3716 // Load address of array of frame pcs into rcx (address*) | |
304 | 3717 __ movptr(rcx, |
3718 Address(rdi, | |
3719 Deoptimization::UnrollBlock::frame_pcs_offset_in_bytes())); | |
0 | 3720 |
3721 // Trash the return pc | |
304 | 3722 __ addptr(rsp, wordSize); |
0 | 3723 |
3724 // Load address of array of frame sizes into rsi (intptr_t*) | |
304 | 3725 __ movptr(rsi, Address(rdi, |
3726 Deoptimization::UnrollBlock:: | |
3727 frame_sizes_offset_in_bytes())); | |
0 | 3728 |
3729 // Counter | |
3730 __ movl(rdx, Address(rdi, | |
3731 Deoptimization::UnrollBlock:: | |
3732 number_of_frames_offset_in_bytes())); // (int) | |
3733 | |
3734 // Pick up the initial fp we should save | |
304 | 3735 __ movptr(rbp, |
3736 Address(rdi, | |
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bdelsart
parents:
3442
diff
changeset
|
3737 Deoptimization::UnrollBlock::initial_info_offset_in_bytes())); |
0 | 3738 |
3739 // Now adjust the caller's stack to make up for the extra locals but | |
3740 // record the original sp so that we can save it in the skeletal | |
3741 // interpreter frame and the stack walking of interpreter_sender | |
3742 // will get the unextended sp value and not the "real" sp value. | |
3743 | |
3744 const Register sender_sp = r8; | |
3745 | |
304 | 3746 __ mov(sender_sp, rsp); |
0 | 3747 __ movl(rbx, Address(rdi, |
3748 Deoptimization::UnrollBlock:: | |
3749 caller_adjustment_offset_in_bytes())); // (int) | |
304 | 3750 __ subptr(rsp, rbx); |
0 | 3751 |
3752 // Push interpreter frames in a loop | |
3753 Label loop; | |
3754 __ bind(loop); | |
304 | 3755 __ movptr(rbx, Address(rsi, 0)); // Load frame size |
3756 __ subptr(rbx, 2 * wordSize); // We'll push pc and rbp by hand | |
3757 __ pushptr(Address(rcx, 0)); // Save return address | |
3758 __ enter(); // Save old & set new rbp | |
3759 __ subptr(rsp, rbx); // Prolog | |
520
52a431267315
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coleenp
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304
diff
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|
3760 #ifdef CC_INTERP |
52a431267315
6791168: Fix invalid code in bytecodeInterpreter that can cause gcc ICE
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|
3761 __ movptr(Address(rbp, |
52a431267315
6791168: Fix invalid code in bytecodeInterpreter that can cause gcc ICE
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diff
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|
3762 -(sizeof(BytecodeInterpreter)) + in_bytes(byte_offset_of(BytecodeInterpreter, _sender_sp))), |
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diff
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|
3763 sender_sp); // Make it walkable |
52a431267315
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diff
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|
3764 #else // CC_INTERP |
304 | 3765 __ movptr(Address(rbp, frame::interpreter_frame_sender_sp_offset * wordSize), |
3766 sender_sp); // Make it walkable | |
0 | 3767 // This value is corrected by layout_activation_impl |
304 | 3768 __ movptr(Address(rbp, frame::interpreter_frame_last_sp_offset * wordSize), (int32_t)NULL_WORD ); |
520
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coleenp
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diff
changeset
|
3769 #endif // CC_INTERP |
304 | 3770 __ mov(sender_sp, rsp); // Pass sender_sp to next frame |
3771 __ addptr(rsi, wordSize); // Bump array pointer (sizes) | |
3772 __ addptr(rcx, wordSize); // Bump array pointer (pcs) | |
3773 __ decrementl(rdx); // Decrement counter | |
0 | 3774 __ jcc(Assembler::notZero, loop); |
304 | 3775 __ pushptr(Address(rcx, 0)); // Save final return address |
0 | 3776 |
3777 // Re-push self-frame | |
3778 __ enter(); // Save old & set new rbp | |
304 | 3779 __ subptr(rsp, (SimpleRuntimeFrame::framesize - 4) << LogBytesPerInt); |
0 | 3780 // Prolog |
3781 | |
3782 // Use rbp because the frames look interpreted now | |
4057
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|
3783 // Save "the_pc" since it cannot easily be retrieved using the last_java_SP after we aligned SP. |
1feb272af3a7
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3931
diff
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|
3784 // Don't need the precise return PC here, just precise enough to point into this code blob. |
1feb272af3a7
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|
3785 address the_pc = __ pc(); |
1feb272af3a7
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|
3786 __ set_last_Java_frame(noreg, rbp, the_pc); |
0 | 3787 |
3788 // Call C code. Need thread but NOT official VM entry | |
3789 // crud. We cannot block on this call, no GC can happen. Call should | |
3790 // restore return values to their stack-slots with the new SP. | |
3791 // Thread is in rdi already. | |
3792 // | |
3793 // BasicType unpack_frames(JavaThread* thread, int exec_mode); | |
3794 | |
4057
1feb272af3a7
6636110: unaligned stackpointer leads to crash during deoptimization
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3931
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|
3795 __ andptr(rsp, -(StackAlignmentInBytes)); // Align SP as required by ABI |
304 | 3796 __ mov(c_rarg0, r15_thread); |
0 | 3797 __ movl(c_rarg1, Deoptimization::Unpack_uncommon_trap); |
3798 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, Deoptimization::unpack_frames))); | |
3799 | |
3800 // Set an oopmap for the call site | |
4057
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diff
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|
3801 // Use the same PC we used for the last java frame |
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diff
changeset
|
3802 oop_maps->add_gc_map(the_pc - start, new OopMap(SimpleRuntimeFrame::framesize, 0)); |
1feb272af3a7
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|
3803 |
1feb272af3a7
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3931
diff
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|
3804 // Clear fp AND pc |
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|
3805 __ reset_last_Java_frame(true, true); |
0 | 3806 |
3807 // Pop self-frame. | |
3808 __ leave(); // Epilog | |
3809 | |
3810 // Jump to interpreter | |
3811 __ ret(0); | |
3812 | |
3813 // Make sure all code is generated | |
3814 masm->flush(); | |
3815 | |
3816 _uncommon_trap_blob = UncommonTrapBlob::create(&buffer, oop_maps, | |
3817 SimpleRuntimeFrame::framesize >> 1); | |
3818 } | |
3819 #endif // COMPILER2 | |
3820 | |
3821 | |
3822 //------------------------------generate_handler_blob------ | |
3823 // | |
3824 // Generate a special Compile2Runtime blob that saves all registers, | |
3825 // and setup oopmap. | |
3826 // | |
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3827 SafepointBlob* SharedRuntime::generate_handler_blob(address call_ptr, int poll_type) { |
0 | 3828 assert(StubRoutines::forward_exception_entry() != NULL, |
3829 "must be generated before"); | |
3830 | |
3831 ResourceMark rm; | |
3832 OopMapSet *oop_maps = new OopMapSet(); | |
3833 OopMap* map; | |
3834 | |
3835 // Allocate space for the code. Setup code generation tools. | |
3836 CodeBuffer buffer("handler_blob", 2048, 1024); | |
3837 MacroAssembler* masm = new MacroAssembler(&buffer); | |
3838 | |
3839 address start = __ pc(); | |
3840 address call_pc = NULL; | |
3841 int frame_size_in_words; | |
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3842 bool cause_return = (poll_type == POLL_AT_RETURN); |
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3843 bool save_vectors = (poll_type == POLL_AT_VECTOR_LOOP); |
0 | 3844 |
3845 // Make room for return address (or push it again) | |
3846 if (!cause_return) { | |
304 | 3847 __ push(rbx); |
0 | 3848 } |
3849 | |
3850 // Save registers, fpu state, and flags | |
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3851 map = RegisterSaver::save_live_registers(masm, 0, &frame_size_in_words, save_vectors); |
0 | 3852 |
3853 // The following is basically a call_VM. However, we need the precise | |
3854 // address of the call in order to generate an oopmap. Hence, we do all the | |
3855 // work outselves. | |
3856 | |
3857 __ set_last_Java_frame(noreg, noreg, NULL); | |
3858 | |
3859 // The return address must always be correct so that frame constructor never | |
3860 // sees an invalid pc. | |
3861 | |
3862 if (!cause_return) { | |
3863 // overwrite the dummy value we pushed on entry | |
304 | 3864 __ movptr(c_rarg0, Address(r15_thread, JavaThread::saved_exception_pc_offset())); |
3865 __ movptr(Address(rbp, wordSize), c_rarg0); | |
0 | 3866 } |
3867 | |
3868 // Do the call | |
304 | 3869 __ mov(c_rarg0, r15_thread); |
0 | 3870 __ call(RuntimeAddress(call_ptr)); |
3871 | |
3872 // Set an oopmap for the call site. This oopmap will map all | |
3873 // oop-registers and debug-info registers as callee-saved. This | |
3874 // will allow deoptimization at this safepoint to find all possible | |
3875 // debug-info recordings, as well as let GC find all oops. | |
3876 | |
3877 oop_maps->add_gc_map( __ pc() - start, map); | |
3878 | |
3879 Label noException; | |
3880 | |
3881 __ reset_last_Java_frame(false, false); | |
3882 | |
304 | 3883 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD); |
0 | 3884 __ jcc(Assembler::equal, noException); |
3885 | |
3886 // Exception pending | |
3887 | |
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3888 RegisterSaver::restore_live_registers(masm, save_vectors); |
0 | 3889 |
3890 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry())); | |
3891 | |
3892 // No exception case | |
3893 __ bind(noException); | |
3894 | |
3895 // Normal exit, restore registers and exit. | |
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3896 RegisterSaver::restore_live_registers(masm, save_vectors); |
0 | 3897 |
3898 __ ret(0); | |
3899 | |
3900 // Make sure all code is generated | |
3901 masm->flush(); | |
3902 | |
3903 // Fill-out other meta info | |
3904 return SafepointBlob::create(&buffer, oop_maps, frame_size_in_words); | |
3905 } | |
3906 | |
3907 // | |
3908 // generate_resolve_blob - call resolution (static/virtual/opt-virtual/ic-miss | |
3909 // | |
3910 // Generate a stub that calls into vm to find out the proper destination | |
3911 // of a java call. All the argument registers are live at this point | |
3912 // but since this is generic code we don't know what they are and the caller | |
3913 // must do any gc of the args. | |
3914 // | |
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3915 RuntimeStub* SharedRuntime::generate_resolve_blob(address destination, const char* name) { |
0 | 3916 assert (StubRoutines::forward_exception_entry() != NULL, "must be generated before"); |
3917 | |
3918 // allocate space for the code | |
3919 ResourceMark rm; | |
3920 | |
3921 CodeBuffer buffer(name, 1000, 512); | |
3922 MacroAssembler* masm = new MacroAssembler(&buffer); | |
3923 | |
3924 int frame_size_in_words; | |
3925 | |
3926 OopMapSet *oop_maps = new OopMapSet(); | |
3927 OopMap* map = NULL; | |
3928 | |
3929 int start = __ offset(); | |
3930 | |
3931 map = RegisterSaver::save_live_registers(masm, 0, &frame_size_in_words); | |
3932 | |
3933 int frame_complete = __ offset(); | |
3934 | |
3935 __ set_last_Java_frame(noreg, noreg, NULL); | |
3936 | |
304 | 3937 __ mov(c_rarg0, r15_thread); |
0 | 3938 |
3939 __ call(RuntimeAddress(destination)); | |
3940 | |
3941 | |
3942 // Set an oopmap for the call site. | |
3943 // We need this not only for callee-saved registers, but also for volatile | |
3944 // registers that the compiler might be keeping live across a safepoint. | |
3945 | |
3946 oop_maps->add_gc_map( __ offset() - start, map); | |
3947 | |
3948 // rax contains the address we are going to jump to assuming no exception got installed | |
3949 | |
3950 // clear last_Java_sp | |
3951 __ reset_last_Java_frame(false, false); | |
3952 // check for pending exceptions | |
3953 Label pending; | |
304 | 3954 __ cmpptr(Address(r15_thread, Thread::pending_exception_offset()), (int32_t)NULL_WORD); |
0 | 3955 __ jcc(Assembler::notEqual, pending); |
3956 | |
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3957 // get the returned Method* |
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3958 __ get_vm_result_2(rbx, r15_thread); |
304 | 3959 __ movptr(Address(rsp, RegisterSaver::rbx_offset_in_bytes()), rbx); |
3960 | |
3961 __ movptr(Address(rsp, RegisterSaver::rax_offset_in_bytes()), rax); | |
0 | 3962 |
3963 RegisterSaver::restore_live_registers(masm); | |
3964 | |
3965 // We are back the the original state on entry and ready to go. | |
3966 | |
3967 __ jmp(rax); | |
3968 | |
3969 // Pending exception after the safepoint | |
3970 | |
3971 __ bind(pending); | |
3972 | |
3973 RegisterSaver::restore_live_registers(masm); | |
3974 | |
3975 // exception pending => remove activation and forward to exception handler | |
3976 | |
3977 __ movptr(Address(r15_thread, JavaThread::vm_result_offset()), (int)NULL_WORD); | |
3978 | |
304 | 3979 __ movptr(rax, Address(r15_thread, Thread::pending_exception_offset())); |
0 | 3980 __ jump(RuntimeAddress(StubRoutines::forward_exception_entry())); |
3981 | |
3982 // ------------- | |
3983 // make sure all code is generated | |
3984 masm->flush(); | |
3985 | |
3986 // return the blob | |
3987 // frame_size_words or bytes?? | |
3988 return RuntimeStub::new_runtime_stub(name, &buffer, frame_complete, frame_size_in_words, oop_maps, true); | |
3989 } | |
3990 | |
3991 | |
3992 #ifdef COMPILER2 | |
3993 // This is here instead of runtime_x86_64.cpp because it uses SimpleRuntimeFrame | |
3994 // | |
3995 //------------------------------generate_exception_blob--------------------------- | |
3996 // creates exception blob at the end | |
3997 // Using exception blob, this code is jumped from a compiled method. | |
3998 // (see emit_exception_handler in x86_64.ad file) | |
3999 // | |
4000 // Given an exception pc at a call we call into the runtime for the | |
4001 // handler in this method. This handler might merely restore state | |
4002 // (i.e. callee save registers) unwind the frame and jump to the | |
4003 // exception handler for the nmethod if there is no Java level handler | |
4004 // for the nmethod. | |
4005 // | |
4006 // This code is entered with a jmp. | |
4007 // | |
4008 // Arguments: | |
4009 // rax: exception oop | |
4010 // rdx: exception pc | |
4011 // | |
4012 // Results: | |
4013 // rax: exception oop | |
4014 // rdx: exception pc in caller or ??? | |
4015 // destination: exception handler of caller | |
4016 // | |
4017 // Note: the exception pc MUST be at a call (precise debug information) | |
4018 // Registers rax, rdx, rcx, rsi, rdi, r8-r11 are not callee saved. | |
4019 // | |
4020 | |
4021 void OptoRuntime::generate_exception_blob() { | |
4022 assert(!OptoRuntime::is_callee_saved_register(RDX_num), ""); | |
4023 assert(!OptoRuntime::is_callee_saved_register(RAX_num), ""); | |
4024 assert(!OptoRuntime::is_callee_saved_register(RCX_num), ""); | |
4025 | |
4026 assert(SimpleRuntimeFrame::framesize % 4 == 0, "sp not 16-byte aligned"); | |
4027 | |
4028 // Allocate space for the code | |
4029 ResourceMark rm; | |
4030 // Setup code generation tools | |
4031 CodeBuffer buffer("exception_blob", 2048, 1024); | |
4032 MacroAssembler* masm = new MacroAssembler(&buffer); | |
4033 | |
4034 | |
4035 address start = __ pc(); | |
4036 | |
4037 // Exception pc is 'return address' for stack walker | |
304 | 4038 __ push(rdx); |
4039 __ subptr(rsp, SimpleRuntimeFrame::return_off << LogBytesPerInt); // Prolog | |
0 | 4040 |
4041 // Save callee-saved registers. See x86_64.ad. | |
4042 | |
4043 // rbp is an implicitly saved callee saved register (i.e. the calling | |
4044 // convention will save restore it in prolog/epilog) Other than that | |
4045 // there are no callee save registers now that adapter frames are gone. | |
4046 | |
304 | 4047 __ movptr(Address(rsp, SimpleRuntimeFrame::rbp_off << LogBytesPerInt), rbp); |
0 | 4048 |
4049 // Store exception in Thread object. We cannot pass any arguments to the | |
4050 // handle_exception call, since we do not want to make any assumption | |
4051 // about the size of the frame where the exception happened in. | |
4052 // c_rarg0 is either rdi (Linux) or rcx (Windows). | |
304 | 4053 __ movptr(Address(r15_thread, JavaThread::exception_oop_offset()),rax); |
4054 __ movptr(Address(r15_thread, JavaThread::exception_pc_offset()), rdx); | |
0 | 4055 |
4056 // This call does all the hard work. It checks if an exception handler | |
4057 // exists in the method. | |
4058 // If so, it returns the handler address. | |
4059 // If not, it prepares for stack-unwinding, restoring the callee-save | |
4060 // registers of the frame being removed. | |
4061 // | |
4062 // address OptoRuntime::handle_exception_C(JavaThread* thread) | |
4063 | |
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4064 // At a method handle call, the stack may not be properly aligned |
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4065 // when returning with an exception. |
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4066 address the_pc = __ pc(); |
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4067 __ set_last_Java_frame(noreg, noreg, the_pc); |
304 | 4068 __ mov(c_rarg0, r15_thread); |
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4069 __ andptr(rsp, -(StackAlignmentInBytes)); // Align stack |
0 | 4070 __ call(RuntimeAddress(CAST_FROM_FN_PTR(address, OptoRuntime::handle_exception_C))); |
4071 | |
4072 // Set an oopmap for the call site. This oopmap will only be used if we | |
4073 // are unwinding the stack. Hence, all locations will be dead. | |
4074 // Callee-saved registers will be the same as the frame above (i.e., | |
4075 // handle_exception_stub), since they were restored when we got the | |
4076 // exception. | |
4077 | |
4078 OopMapSet* oop_maps = new OopMapSet(); | |
4079 | |
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4080 oop_maps->add_gc_map(the_pc - start, new OopMap(SimpleRuntimeFrame::framesize, 0)); |
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4081 |
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4082 __ reset_last_Java_frame(false, true); |
0 | 4083 |
4084 // Restore callee-saved registers | |
4085 | |
4086 // rbp is an implicitly saved callee saved register (i.e. the calling | |
4087 // convention will save restore it in prolog/epilog) Other than that | |
4088 // there are no callee save registers no that adapter frames are gone. | |
4089 | |
304 | 4090 __ movptr(rbp, Address(rsp, SimpleRuntimeFrame::rbp_off << LogBytesPerInt)); |
4091 | |
4092 __ addptr(rsp, SimpleRuntimeFrame::return_off << LogBytesPerInt); // Epilog | |
4093 __ pop(rdx); // No need for exception pc anymore | |
0 | 4094 |
4095 // rax: exception handler | |
4096 | |
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4097 // Restore SP from BP if the exception PC is a MethodHandle call site. |
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4098 __ cmpl(Address(r15_thread, JavaThread::is_method_handle_return_offset()), 0); |
1567 | 4099 __ cmovptr(Assembler::notEqual, rsp, rbp_mh_SP_save); |
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4100 |
0 | 4101 // We have a handler in rax (could be deopt blob). |
304 | 4102 __ mov(r8, rax); |
0 | 4103 |
4104 // Get the exception oop | |
304 | 4105 __ movptr(rax, Address(r15_thread, JavaThread::exception_oop_offset())); |
0 | 4106 // Get the exception pc in case we are deoptimized |
304 | 4107 __ movptr(rdx, Address(r15_thread, JavaThread::exception_pc_offset())); |
0 | 4108 #ifdef ASSERT |
4109 __ movptr(Address(r15_thread, JavaThread::exception_handler_pc_offset()), (int)NULL_WORD); | |
4110 __ movptr(Address(r15_thread, JavaThread::exception_pc_offset()), (int)NULL_WORD); | |
4111 #endif | |
4112 // Clear the exception oop so GC no longer processes it as a root. | |
4113 __ movptr(Address(r15_thread, JavaThread::exception_oop_offset()), (int)NULL_WORD); | |
4114 | |
4115 // rax: exception oop | |
4116 // r8: exception handler | |
4117 // rdx: exception pc | |
4118 // Jump to handler | |
4119 | |
4120 __ jmp(r8); | |
4121 | |
4122 // Make sure all code is generated | |
4123 masm->flush(); | |
4124 | |
4125 // Set exception blob | |
4126 _exception_blob = ExceptionBlob::create(&buffer, oop_maps, SimpleRuntimeFrame::framesize >> 1); | |
4127 } | |
4128 #endif // COMPILER2 |