Mercurial > hg > truffle
annotate src/cpu/x86/vm/vtableStubs_x86_32.cpp @ 623:9adddb8c0fc8
6812831: factor duplicated assembly code for megamorphic invokeinterface (for 6655638)
Summary: Code in vtableStubs and templateTable moved into MacroAssembler.
Reviewed-by: kvn
| author | jrose |
|---|---|
| date | Fri, 06 Mar 2009 21:36:50 -0800 |
| parents | 9ee9cf798b59 |
| children | 1d037ecd7960 |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 337 | 2 * Copyright 1997-2008 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_32.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, oop receiver, int index); | |
| 35 #endif | |
| 36 | |
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37 // These stubs are used by the compiler only. |
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38 // Argument registers, which must be preserved: |
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39 // rcx - receiver (always first argument) |
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40 // rdx - second argument (if any) |
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41 // Other registers that might be usable: |
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42 // rax - inline cache register (is interface for itable stub) |
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43 // rbx - method (used when calling out to interpreter) |
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44 // Available now, but may become callee-save at some point: |
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45 // rsi, rdi |
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46 // Note that rax and rdx are also used for return values. |
| 0 | 47 // |
| 48 VtableStub* VtableStubs::create_vtable_stub(int vtable_index) { | |
| 49 const int i486_code_length = VtableStub::pd_code_size_limit(true); | |
| 50 VtableStub* s = new(i486_code_length) VtableStub(true, vtable_index); | |
| 51 ResourceMark rm; | |
| 52 CodeBuffer cb(s->entry_point(), i486_code_length); | |
| 53 MacroAssembler* masm = new MacroAssembler(&cb); | |
| 54 | |
| 55 #ifndef PRODUCT | |
| 56 | |
| 57 if (CountCompiledCalls) { | |
| 304 | 58 __ incrementl(ExternalAddress((address) SharedRuntime::nof_megamorphic_calls_addr())); |
| 0 | 59 } |
| 60 #endif /* PRODUCT */ | |
| 61 | |
| 62 // get receiver (need to skip return address on top of stack) | |
| 63 assert(VtableStub::receiver_location() == rcx->as_VMReg(), "receiver expected in rcx"); | |
| 64 | |
| 65 // get receiver klass | |
| 66 address npe_addr = __ pc(); | |
| 304 | 67 __ movptr(rax, Address(rcx, oopDesc::klass_offset_in_bytes())); |
| 0 | 68 // compute entry offset (in words) |
| 69 int entry_offset = instanceKlass::vtable_start_offset() + vtable_index*vtableEntry::size(); | |
| 70 #ifndef PRODUCT | |
| 71 if (DebugVtables) { | |
| 72 Label L; | |
| 73 // check offset vs vtable length | |
| 74 __ cmpl(Address(rax, instanceKlass::vtable_length_offset()*wordSize), vtable_index*vtableEntry::size()); | |
| 75 __ jcc(Assembler::greater, L); | |
| 76 __ movl(rbx, vtable_index); | |
| 77 __ call_VM(noreg, CAST_FROM_FN_PTR(address, bad_compiled_vtable_index), rcx, rbx); | |
| 78 __ bind(L); | |
| 79 } | |
| 80 #endif // PRODUCT | |
| 81 | |
| 82 const Register method = rbx; | |
| 83 | |
| 84 // load methodOop and target address | |
| 304 | 85 __ movptr(method, Address(rax, entry_offset*wordSize + vtableEntry::method_offset_in_bytes())); |
| 0 | 86 if (DebugVtables) { |
| 87 Label L; | |
| 304 | 88 __ cmpptr(method, (int32_t)NULL_WORD); |
| 0 | 89 __ jcc(Assembler::equal, L); |
| 304 | 90 __ cmpptr(Address(method, methodOopDesc::from_compiled_offset()), (int32_t)NULL_WORD); |
| 0 | 91 __ jcc(Assembler::notZero, L); |
| 92 __ stop("Vtable entry is NULL"); | |
| 93 __ bind(L); | |
| 94 } | |
| 95 | |
| 96 // rax,: receiver klass | |
| 97 // method (rbx): methodOop | |
| 98 // rcx: receiver | |
| 99 address ame_addr = __ pc(); | |
| 100 __ jmp( Address(method, methodOopDesc::from_compiled_offset())); | |
| 101 | |
| 102 masm->flush(); | |
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103 |
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104 if (PrintMiscellaneous && (WizardMode || Verbose)) { |
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105 tty->print_cr("vtable #%d at "PTR_FORMAT"[%d] left over: %d", |
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106 vtable_index, s->entry_point(), |
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107 (int)(s->code_end() - s->entry_point()), |
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108 (int)(s->code_end() - __ pc())); |
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109 } |
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110 guarantee(__ pc() <= s->code_end(), "overflowed buffer"); |
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111 |
| 0 | 112 s->set_exception_points(npe_addr, ame_addr); |
| 113 return s; | |
| 114 } | |
| 115 | |
| 116 | |
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117 VtableStub* VtableStubs::create_itable_stub(int itable_index) { |
| 0 | 118 // Note well: pd_code_size_limit is the absolute minimum we can get away with. If you |
| 119 // add code here, bump the code stub size returned by pd_code_size_limit! | |
| 120 const int i486_code_length = VtableStub::pd_code_size_limit(false); | |
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121 VtableStub* s = new(i486_code_length) VtableStub(false, itable_index); |
| 0 | 122 ResourceMark rm; |
| 123 CodeBuffer cb(s->entry_point(), i486_code_length); | |
| 124 MacroAssembler* masm = new MacroAssembler(&cb); | |
| 125 | |
| 126 // Entry arguments: | |
| 127 // rax,: Interface | |
| 128 // rcx: Receiver | |
| 129 | |
| 130 #ifndef PRODUCT | |
| 131 if (CountCompiledCalls) { | |
| 304 | 132 __ incrementl(ExternalAddress((address) SharedRuntime::nof_megamorphic_calls_addr())); |
| 0 | 133 } |
| 134 #endif /* PRODUCT */ | |
| 135 // get receiver (need to skip return address on top of stack) | |
| 136 | |
| 137 assert(VtableStub::receiver_location() == rcx->as_VMReg(), "receiver expected in rcx"); | |
| 138 | |
| 139 // get receiver klass (also an implicit null-check) | |
| 140 address npe_addr = __ pc(); | |
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141 __ movptr(rsi, Address(rcx, oopDesc::klass_offset_in_bytes())); |
| 0 | 142 |
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143 // Most registers are in use; we'll use rax, rbx, rsi, rdi |
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144 // (If we need to make rsi, rdi callee-save, do a push/pop here.) |
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145 const Register method = rbx; |
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146 Label throw_icce; |
| 0 | 147 |
| 148 // Get methodOop and entrypoint for compiler | |
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149 __ lookup_interface_method(// inputs: rec. class, interface, itable index |
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150 rsi, rax, itable_index, |
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151 // outputs: method, scan temp. reg |
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152 method, rdi, |
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153 throw_icce); |
| 0 | 154 |
| 155 // method (rbx): methodOop | |
| 156 // rcx: receiver | |
| 157 | |
| 158 #ifdef ASSERT | |
| 159 if (DebugVtables) { | |
| 160 Label L1; | |
| 304 | 161 __ cmpptr(method, (int32_t)NULL_WORD); |
| 0 | 162 __ jcc(Assembler::equal, L1); |
| 304 | 163 __ cmpptr(Address(method, methodOopDesc::from_compiled_offset()), (int32_t)NULL_WORD); |
| 0 | 164 __ jcc(Assembler::notZero, L1); |
| 165 __ stop("methodOop is null"); | |
| 166 __ bind(L1); | |
| 167 } | |
| 168 #endif // ASSERT | |
| 169 | |
| 170 address ame_addr = __ pc(); | |
| 171 __ jmp(Address(method, methodOopDesc::from_compiled_offset())); | |
| 172 | |
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173 __ bind(throw_icce); |
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174 __ jump(RuntimeAddress(StubRoutines::throw_IncompatibleClassChangeError_entry())); |
| 0 | 175 masm->flush(); |
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176 |
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177 if (PrintMiscellaneous && (WizardMode || Verbose)) { |
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178 tty->print_cr("itable #%d at "PTR_FORMAT"[%d] left over: %d", |
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179 itable_index, s->entry_point(), |
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180 (int)(s->code_end() - s->entry_point()), |
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181 (int)(s->code_end() - __ pc())); |
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182 } |
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183 guarantee(__ pc() <= s->code_end(), "overflowed buffer"); |
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184 |
| 0 | 185 s->set_exception_points(npe_addr, ame_addr); |
| 186 return s; | |
| 187 } | |
| 188 | |
| 189 | |
| 190 | |
| 191 int VtableStub::pd_code_size_limit(bool is_vtable_stub) { | |
| 192 if (is_vtable_stub) { | |
| 193 // Vtable stub size | |
| 194 return (DebugVtables ? 210 : 16) + (CountCompiledCalls ? 6 : 0); | |
| 195 } else { | |
| 196 // Itable stub size | |
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197 return (DebugVtables ? 256 : 66) + (CountCompiledCalls ? 6 : 0); |
| 0 | 198 } |
| 199 } | |
| 200 | |
| 201 int VtableStub::pd_code_alignment() { | |
| 202 return wordSize; | |
| 203 } |