Mercurial > hg > truffle
annotate src/cpu/sparc/vm/vtableStubs_sparc.cpp @ 4591:33f181ad79d5
changed DynamicSizeBasedInliningPolicy to use log(probability) for frequently executed loops, added check for SmallCompiledCodeSize to WeightBasedInliningPolicy.
author | Christian Haeubl <christian.haeubl@oracle.com> |
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date | Mon, 13 Feb 2012 18:40:54 -0800 |
parents | 6729bbc1fcd6 |
children | 1d7922586cf6 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2011, 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" |
26 #include "asm/assembler.hpp" | |
27 #include "assembler_sparc.inline.hpp" | |
28 #include "code/vtableStubs.hpp" | |
29 #include "interp_masm_sparc.hpp" | |
30 #include "memory/resourceArea.hpp" | |
31 #include "oops/instanceKlass.hpp" | |
32 #include "oops/klassVtable.hpp" | |
33 #include "runtime/sharedRuntime.hpp" | |
34 #include "vmreg_sparc.inline.hpp" | |
35 #ifdef COMPILER2 | |
36 #include "opto/runtime.hpp" | |
37 #endif | |
0 | 38 |
39 // machine-dependent part of VtableStubs: create vtableStub of correct size and | |
40 // initialize its code | |
41 | |
42 #define __ masm-> | |
43 | |
44 | |
45 #ifndef PRODUCT | |
46 extern "C" void bad_compiled_vtable_index(JavaThread* thread, oopDesc* receiver, int index); | |
47 #endif | |
48 | |
49 | |
50 // Used by compiler only; may use only caller saved, non-argument registers | |
51 // NOTE: %%%% if any change is made to this stub make sure that the function | |
52 // pd_code_size_limit is changed to ensure the correct size for VtableStub | |
53 VtableStub* VtableStubs::create_vtable_stub(int vtable_index) { | |
54 const int sparc_code_length = VtableStub::pd_code_size_limit(true); | |
55 VtableStub* s = new(sparc_code_length) VtableStub(true, vtable_index); | |
56 ResourceMark rm; | |
57 CodeBuffer cb(s->entry_point(), sparc_code_length); | |
58 MacroAssembler* masm = new MacroAssembler(&cb); | |
59 | |
60 #ifndef PRODUCT | |
61 if (CountCompiledCalls) { | |
727 | 62 __ inc_counter(SharedRuntime::nof_megamorphic_calls_addr(), G5, G3_scratch); |
0 | 63 } |
64 #endif /* PRODUCT */ | |
65 | |
66 assert(VtableStub::receiver_location() == O0->as_VMReg(), "receiver expected in O0"); | |
67 | |
68 // get receiver klass | |
69 address npe_addr = __ pc(); | |
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70 __ load_klass(O0, G3_scratch); |
0 | 71 |
72 // set methodOop (in case of interpreted method), and destination address | |
73 int entry_offset = instanceKlass::vtable_start_offset() + vtable_index*vtableEntry::size(); | |
74 #ifndef PRODUCT | |
75 if (DebugVtables) { | |
76 Label L; | |
77 // check offset vs vtable length | |
78 __ ld(G3_scratch, instanceKlass::vtable_length_offset()*wordSize, G5); | |
3839 | 79 __ cmp_and_br_short(G5, vtable_index*vtableEntry::size(), Assembler::greaterUnsigned, Assembler::pt, L); |
0 | 80 __ set(vtable_index, O2); |
81 __ call_VM(noreg, CAST_FROM_FN_PTR(address, bad_compiled_vtable_index), O0, O2); | |
82 __ bind(L); | |
83 } | |
84 #endif | |
85 int v_off = entry_offset*wordSize + vtableEntry::method_offset_in_bytes(); | |
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86 if (Assembler::is_simm13(v_off)) { |
0 | 87 __ ld_ptr(G3, v_off, G5_method); |
88 } else { | |
89 __ set(v_off,G5); | |
90 __ ld_ptr(G3, G5, G5_method); | |
91 } | |
92 | |
93 #ifndef PRODUCT | |
94 if (DebugVtables) { | |
95 Label L; | |
3839 | 96 __ br_notnull_short(G5_method, Assembler::pt, L); |
0 | 97 __ stop("Vtable entry is ZERO"); |
98 __ bind(L); | |
99 } | |
100 #endif | |
101 | |
102 address ame_addr = __ pc(); // if the vtable entry is null, the method is abstract | |
103 // NOTE: for vtable dispatches, the vtable entry will never be null. | |
104 | |
105 __ ld_ptr(G5_method, in_bytes(methodOopDesc::from_compiled_offset()), G3_scratch); | |
106 | |
107 // jump to target (either compiled code or c2iadapter) | |
108 __ JMP(G3_scratch, 0); | |
109 // load methodOop (in case we call c2iadapter) | |
110 __ delayed()->nop(); | |
111 | |
112 masm->flush(); | |
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113 |
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114 if (PrintMiscellaneous && (WizardMode || Verbose)) { |
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115 tty->print_cr("vtable #%d at "PTR_FORMAT"[%d] left over: %d", |
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116 vtable_index, s->entry_point(), |
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117 (int)(s->code_end() - s->entry_point()), |
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118 (int)(s->code_end() - __ pc())); |
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119 } |
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120 guarantee(__ pc() <= s->code_end(), "overflowed buffer"); |
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121 // shut the door on sizing bugs |
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122 int slop = 2*BytesPerInstWord; // 32-bit offset is this much larger than a 13-bit one |
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123 assert(vtable_index > 10 || __ pc() + slop <= s->code_end(), "room for sethi;add"); |
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124 |
0 | 125 s->set_exception_points(npe_addr, ame_addr); |
126 return s; | |
127 } | |
128 | |
129 | |
130 // NOTE: %%%% if any change is made to this stub make sure that the function | |
131 // pd_code_size_limit is changed to ensure the correct size for VtableStub | |
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132 VtableStub* VtableStubs::create_itable_stub(int itable_index) { |
0 | 133 const int sparc_code_length = VtableStub::pd_code_size_limit(false); |
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134 VtableStub* s = new(sparc_code_length) VtableStub(false, itable_index); |
0 | 135 ResourceMark rm; |
136 CodeBuffer cb(s->entry_point(), sparc_code_length); | |
137 MacroAssembler* masm = new MacroAssembler(&cb); | |
138 | |
139 Register G3_klassOop = G3_scratch; | |
140 Register G5_interface = G5; // Passed in as an argument | |
141 Label search; | |
142 | |
143 // Entry arguments: | |
144 // G5_interface: Interface | |
145 // O0: Receiver | |
146 assert(VtableStub::receiver_location() == O0->as_VMReg(), "receiver expected in O0"); | |
147 | |
148 // get receiver klass (also an implicit null-check) | |
149 address npe_addr = __ pc(); | |
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150 __ load_klass(O0, G3_klassOop); |
0 | 151 __ verify_oop(G3_klassOop); |
152 | |
153 // Push a new window to get some temp registers. This chops the head of all | |
154 // my 64-bit %o registers in the LION build, but this is OK because no longs | |
155 // are passed in the %o registers. Instead, longs are passed in G1 and G4 | |
156 // and so those registers are not available here. | |
157 __ save(SP,-frame::register_save_words*wordSize,SP); | |
158 | |
159 #ifndef PRODUCT | |
160 if (CountCompiledCalls) { | |
727 | 161 __ inc_counter(SharedRuntime::nof_megamorphic_calls_addr(), L0, L1); |
0 | 162 } |
163 #endif /* PRODUCT */ | |
164 | |
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165 Label throw_icce; |
0 | 166 |
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167 Register L5_method = L5; |
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168 __ lookup_interface_method(// inputs: rec. class, interface, itable index |
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169 G3_klassOop, G5_interface, itable_index, |
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170 // outputs: method, scan temp. reg |
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171 L5_method, L2, L3, |
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172 throw_icce); |
0 | 173 |
174 #ifndef PRODUCT | |
175 if (DebugVtables) { | |
176 Label L01; | |
3839 | 177 __ br_notnull_short(L5_method, Assembler::pt, L01); |
0 | 178 __ stop("methodOop is null"); |
179 __ bind(L01); | |
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180 __ verify_oop(L5_method); |
0 | 181 } |
182 #endif | |
183 | |
184 // If the following load is through a NULL pointer, we'll take an OS | |
185 // exception that should translate into an AbstractMethodError. We need the | |
186 // window count to be correct at that time. | |
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187 __ restore(L5_method, 0, G5_method); |
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188 // Restore registers *before* the AME point. |
0 | 189 |
190 address ame_addr = __ pc(); // if the vtable entry is null, the method is abstract | |
191 __ ld_ptr(G5_method, in_bytes(methodOopDesc::from_compiled_offset()), G3_scratch); | |
192 | |
193 // G5_method: methodOop | |
194 // O0: Receiver | |
195 // G3_scratch: entry point | |
196 __ JMP(G3_scratch, 0); | |
197 __ delayed()->nop(); | |
198 | |
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199 __ bind(throw_icce); |
727 | 200 AddressLiteral icce(StubRoutines::throw_IncompatibleClassChangeError_entry()); |
201 __ jump_to(icce, G3_scratch); | |
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202 __ delayed()->restore(); |
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203 |
0 | 204 masm->flush(); |
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205 |
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206 if (PrintMiscellaneous && (WizardMode || Verbose)) { |
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207 tty->print_cr("itable #%d at "PTR_FORMAT"[%d] left over: %d", |
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208 itable_index, s->entry_point(), |
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209 (int)(s->code_end() - s->entry_point()), |
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210 (int)(s->code_end() - __ pc())); |
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211 } |
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212 guarantee(__ pc() <= s->code_end(), "overflowed buffer"); |
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213 // shut the door on sizing bugs |
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214 int slop = 2*BytesPerInstWord; // 32-bit offset is this much larger than a 13-bit one |
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215 assert(itable_index > 10 || __ pc() + slop <= s->code_end(), "room for sethi;add"); |
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216 |
0 | 217 s->set_exception_points(npe_addr, ame_addr); |
218 return s; | |
219 } | |
220 | |
221 | |
222 int VtableStub::pd_code_size_limit(bool is_vtable_stub) { | |
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223 if (TraceJumps || DebugVtables || CountCompiledCalls || VerifyOops) return 1000; |
0 | 224 else { |
225 const int slop = 2*BytesPerInstWord; // sethi;add (needed for long offsets) | |
226 if (is_vtable_stub) { | |
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227 // ld;ld;ld,jmp,nop |
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228 const int basic = 5*BytesPerInstWord + |
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229 // shift;add for load_klass (only shift with zero heap based) |
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230 (UseCompressedOops ? |
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231 ((Universe::narrow_oop_base() == NULL) ? BytesPerInstWord : 2*BytesPerInstWord) : 0); |
0 | 232 return basic + slop; |
233 } else { | |
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234 const int basic = (28 LP64_ONLY(+ 6)) * BytesPerInstWord + |
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235 // shift;add for load_klass (only shift with zero heap based) |
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236 (UseCompressedOops ? |
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237 ((Universe::narrow_oop_base() == NULL) ? BytesPerInstWord : 2*BytesPerInstWord) : 0); |
0 | 238 return (basic + slop); |
239 } | |
240 } | |
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241 |
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242 // In order to tune these parameters, run the JVM with VM options |
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243 // +PrintMiscellaneous and +WizardMode to see information about |
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244 // actual itable stubs. Look for lines like this: |
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245 // itable #1 at 0x5551212[116] left over: 8 |
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246 // Reduce the constants so that the "left over" number is 8 |
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247 // Do not aim at a left-over number of zero, because a very |
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248 // large vtable or itable offset (> 4K) will require an extra |
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249 // sethi/or pair of instructions. |
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250 // |
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251 // The JVM98 app. _202_jess has a megamorphic interface call. |
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252 // The itable code looks like this: |
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253 // Decoding VtableStub itbl[1]@16 |
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254 // ld [ %o0 + 4 ], %g3 |
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255 // save %sp, -64, %sp |
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256 // ld [ %g3 + 0xe8 ], %l2 |
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257 // sll %l2, 2, %l2 |
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258 // add %l2, 0x134, %l2 |
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259 // and %l2, -8, %l2 ! NOT_LP64 only |
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260 // add %g3, %l2, %l2 |
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261 // add %g3, 4, %g3 |
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262 // ld [ %l2 ], %l5 |
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263 // brz,pn %l5, throw_icce |
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264 // cmp %l5, %g5 |
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265 // be %icc, success |
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266 // add %l2, 8, %l2 |
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267 // loop: |
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268 // ld [ %l2 ], %l5 |
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269 // brz,pn %l5, throw_icce |
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270 // cmp %l5, %g5 |
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271 // bne,pn %icc, loop |
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272 // add %l2, 8, %l2 |
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273 // success: |
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274 // ld [ %l2 + -4 ], %l2 |
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275 // ld [ %g3 + %l2 ], %l5 |
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276 // restore %l5, 0, %g5 |
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277 // ld [ %g5 + 0x44 ], %g3 |
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278 // jmp %g3 |
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279 // nop |
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280 // throw_icce: |
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281 // sethi %hi(throw_ICCE_entry), %g3 |
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282 // ! 5 more instructions here, LP64_ONLY |
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283 // jmp %g3 + %lo(throw_ICCE_entry) |
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284 // restore |
0 | 285 } |
286 | |
287 | |
288 int VtableStub::pd_code_alignment() { | |
289 // UltraSPARC cache line size is 8 instructions: | |
290 const unsigned int icache_line_size = 32; | |
291 return icache_line_size; | |
292 } |