Mercurial > hg > truffle
annotate src/cpu/x86/vm/vtableStubs_x86_64.cpp @ 196:d1605aabd0a1 jdk7-b30
6719955: Update copyright year
Summary: Update copyright year for files that have been modified in 2008
Reviewed-by: ohair, tbell
| author | xdono |
|---|---|
| date | Wed, 02 Jul 2008 12:55:16 -0700 |
| parents | ba764ed4b6f2 |
| children | dc7f315e41f7 |
| rev | line source |
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| 0 | 1 /* |
| 196 | 2 * Copyright 2003-2008 Sun Microsystems, Inc. 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 * | |
| 19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
| 20 * CA 95054 USA or visit www.sun.com if you need additional information or | |
| 21 * have any questions. | |
| 22 * | |
| 23 */ | |
| 24 | |
| 25 #include "incls/_precompiled.incl" | |
| 26 #include "incls/_vtableStubs_x86_64.cpp.incl" | |
| 27 | |
| 28 // machine-dependent part of VtableStubs: create VtableStub of correct size and | |
| 29 // initialize its code | |
| 30 | |
| 31 #define __ masm-> | |
| 32 | |
| 33 #ifndef PRODUCT | |
| 34 extern "C" void bad_compiled_vtable_index(JavaThread* thread, | |
| 35 oop receiver, | |
| 36 int index); | |
| 37 #endif | |
| 38 | |
| 39 VtableStub* VtableStubs::create_vtable_stub(int vtable_index) { | |
| 40 const int amd64_code_length = VtableStub::pd_code_size_limit(true); | |
| 41 VtableStub* s = new(amd64_code_length) VtableStub(true, vtable_index); | |
| 42 ResourceMark rm; | |
| 43 CodeBuffer cb(s->entry_point(), amd64_code_length); | |
| 44 MacroAssembler* masm = new MacroAssembler(&cb); | |
| 45 | |
| 46 #ifndef PRODUCT | |
| 47 if (CountCompiledCalls) { | |
| 48 __ incrementl(ExternalAddress((address) SharedRuntime::nof_megamorphic_calls_addr())); | |
| 49 } | |
| 50 #endif | |
| 51 | |
| 52 // get receiver (need to skip return address on top of stack) | |
| 53 assert(VtableStub::receiver_location() == j_rarg0->as_VMReg(), "receiver expected in j_rarg0"); | |
| 54 | |
| 55 // Free registers (non-args) are rax, rbx | |
| 56 | |
| 57 // get receiver klass | |
| 58 address npe_addr = __ pc(); | |
|
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59 __ load_klass(rax, j_rarg0); |
| 0 | 60 |
| 61 // compute entry offset (in words) | |
| 62 int entry_offset = | |
| 63 instanceKlass::vtable_start_offset() + vtable_index * vtableEntry::size(); | |
| 64 | |
| 65 #ifndef PRODUCT | |
| 66 if (DebugVtables) { | |
| 67 Label L; | |
| 68 // check offset vs vtable length | |
| 69 __ cmpl(Address(rax, instanceKlass::vtable_length_offset() * wordSize), | |
| 70 vtable_index * vtableEntry::size()); | |
| 71 __ jcc(Assembler::greater, L); | |
| 72 __ movl(rbx, vtable_index); | |
| 73 __ call_VM(noreg, | |
| 74 CAST_FROM_FN_PTR(address, bad_compiled_vtable_index), j_rarg0, rbx); | |
| 75 __ bind(L); | |
| 76 } | |
| 77 #endif // PRODUCT | |
| 78 | |
| 79 // load methodOop and target address | |
| 80 const Register method = rbx; | |
| 81 | |
| 82 __ movq(method, Address(rax, | |
| 83 entry_offset * wordSize + | |
| 84 vtableEntry::method_offset_in_bytes())); | |
| 85 if (DebugVtables) { | |
| 86 Label L; | |
| 87 __ cmpq(method, (int)NULL); | |
| 88 __ jcc(Assembler::equal, L); | |
| 89 __ cmpq(Address(method, methodOopDesc::from_compiled_offset()), (int)NULL_WORD); | |
| 90 __ jcc(Assembler::notZero, L); | |
| 91 __ stop("Vtable entry is NULL"); | |
| 92 __ bind(L); | |
| 93 } | |
| 94 // rax: receiver klass | |
| 95 // rbx: methodOop | |
| 96 // rcx: receiver | |
| 97 address ame_addr = __ pc(); | |
| 98 __ jmp( Address(rbx, methodOopDesc::from_compiled_offset())); | |
| 99 | |
| 100 __ flush(); | |
| 101 s->set_exception_points(npe_addr, ame_addr); | |
| 102 return s; | |
| 103 } | |
| 104 | |
| 105 | |
| 106 VtableStub* VtableStubs::create_itable_stub(int vtable_index) { | |
| 107 // Note well: pd_code_size_limit is the absolute minimum we can get | |
| 108 // away with. If you add code here, bump the code stub size | |
| 109 // returned by pd_code_size_limit! | |
| 110 const int amd64_code_length = VtableStub::pd_code_size_limit(false); | |
| 111 VtableStub* s = new(amd64_code_length) VtableStub(false, vtable_index); | |
| 112 ResourceMark rm; | |
| 113 CodeBuffer cb(s->entry_point(), amd64_code_length); | |
| 114 MacroAssembler* masm = new MacroAssembler(&cb); | |
| 115 | |
| 116 #ifndef PRODUCT | |
| 117 if (CountCompiledCalls) { | |
| 118 __ incrementl(ExternalAddress((address) SharedRuntime::nof_megamorphic_calls_addr())); | |
| 119 } | |
| 120 #endif | |
| 121 | |
| 122 // Entry arguments: | |
| 123 // rax: Interface | |
| 124 // j_rarg0: Receiver | |
| 125 | |
| 126 // Free registers (non-args) are rax (interface), rbx | |
| 127 | |
| 128 // get receiver (need to skip return address on top of stack) | |
| 129 | |
| 130 assert(VtableStub::receiver_location() == j_rarg0->as_VMReg(), "receiver expected in j_rarg0"); | |
| 131 // get receiver klass (also an implicit null-check) | |
| 132 address npe_addr = __ pc(); | |
| 133 | |
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134 __ load_klass(rbx, j_rarg0); |
| 0 | 135 |
| 136 // If we take a trap while this arg is on the stack we will not | |
| 137 // be able to walk the stack properly. This is not an issue except | |
| 138 // when there are mistakes in this assembly code that could generate | |
| 139 // a spurious fault. Ask me how I know... | |
| 140 | |
| 141 __ pushq(j_rarg1); // Most registers are in use, so save one | |
| 142 | |
| 143 // compute itable entry offset (in words) | |
| 144 const int base = instanceKlass::vtable_start_offset() * wordSize; | |
| 145 assert(vtableEntry::size() * wordSize == 8, | |
| 146 "adjust the scaling in the code below"); | |
| 147 // Get length of vtable | |
| 148 __ movl(j_rarg1, | |
| 149 Address(rbx, instanceKlass::vtable_length_offset() * wordSize)); | |
| 150 __ leaq(rbx, Address(rbx, j_rarg1, Address::times_8, base)); | |
| 151 | |
| 152 if (HeapWordsPerLong > 1) { | |
| 153 // Round up to align_object_offset boundary | |
| 154 __ round_to_q(rbx, BytesPerLong); | |
| 155 } | |
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156 Label hit, next, entry, throw_icce; |
| 0 | 157 |
| 158 __ jmpb(entry); | |
| 159 | |
| 160 __ bind(next); | |
| 161 __ addq(rbx, itableOffsetEntry::size() * wordSize); | |
| 162 | |
| 163 __ bind(entry); | |
| 164 | |
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165 // If the entry is NULL then we've reached the end of the table |
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166 // without finding the expected interface, so throw an exception |
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167 __ movq(j_rarg1, Address(rbx, itableOffsetEntry::interface_offset_in_bytes())); |
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168 __ testq(j_rarg1, j_rarg1); |
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169 __ jcc(Assembler::zero, throw_icce); |
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170 __ cmpq(rax, j_rarg1); |
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171 __ jccb(Assembler::notEqual, next); |
| 0 | 172 |
| 173 // We found a hit, move offset into j_rarg1 | |
| 174 __ movl(j_rarg1, Address(rbx, itableOffsetEntry::offset_offset_in_bytes())); | |
| 175 | |
| 176 // Compute itableMethodEntry | |
| 177 const int method_offset = | |
| 178 (itableMethodEntry::size() * wordSize * vtable_index) + | |
| 179 itableMethodEntry::method_offset_in_bytes(); | |
| 180 | |
| 181 // Get methodOop and entrypoint for compiler | |
| 182 | |
| 183 // Get klass pointer again | |
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184 __ load_klass(rax, j_rarg0); |
| 0 | 185 |
| 186 const Register method = rbx; | |
| 187 __ movq(method, Address(rax, j_rarg1, Address::times_1, method_offset)); | |
| 188 | |
| 189 // Restore saved register, before possible trap. | |
| 190 __ popq(j_rarg1); | |
| 191 | |
| 192 // method (rbx): methodOop | |
| 193 // j_rarg0: receiver | |
| 194 | |
| 195 | |
| 196 #ifdef ASSERT | |
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197 if (DebugVtables) { |
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198 Label L2; |
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199 __ cmpq(method, (int)NULL); |
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200 __ jcc(Assembler::equal, L2); |
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201 __ cmpq(Address(method, methodOopDesc::from_compiled_offset()), (int)NULL_WORD); |
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202 __ jcc(Assembler::notZero, L2); |
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203 __ stop("compiler entrypoint is null"); |
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204 __ bind(L2); |
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205 } |
| 0 | 206 #endif // ASSERT |
| 207 | |
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208 // rbx: methodOop |
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209 // j_rarg0: receiver |
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210 address ame_addr = __ pc(); |
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211 __ jmp(Address(method, methodOopDesc::from_compiled_offset())); |
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212 |
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213 __ bind(throw_icce); |
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214 // Restore saved register |
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215 __ popq(j_rarg1); |
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216 __ jump(RuntimeAddress(StubRoutines::throw_IncompatibleClassChangeError_entry())); |
| 0 | 217 |
| 218 __ flush(); | |
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219 |
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220 guarantee(__ pc() <= s->code_end(), "overflowed buffer"); |
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221 |
| 0 | 222 s->set_exception_points(npe_addr, ame_addr); |
| 223 return s; | |
| 224 } | |
| 225 | |
| 226 int VtableStub::pd_code_size_limit(bool is_vtable_stub) { | |
| 227 if (is_vtable_stub) { | |
| 228 // Vtable stub size | |
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229 return (DebugVtables ? 512 : 24) + (CountCompiledCalls ? 13 : 0) + |
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230 (UseCompressedOops ? 16 : 0); // 1 leaq can be 3 bytes + 1 long |
| 0 | 231 } else { |
| 232 // Itable stub size | |
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233 return (DebugVtables ? 636 : 72) + (CountCompiledCalls ? 13 : 0) + |
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234 (UseCompressedOops ? 32 : 0); // 2 leaqs |
| 0 | 235 } |
| 236 } | |
| 237 | |
| 238 int VtableStub::pd_code_alignment() { | |
| 239 return wordSize; | |
| 240 } |