Mercurial > hg > truffle
annotate src/cpu/x86/vm/vtableStubs_x86_64.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 | dc7f315e41f7 |
| children | 1d037ecd7960 |
| rev | line source |
|---|---|
| 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 | |
| 304 | 82 __ movptr(method, Address(rax, |
| 83 entry_offset * wordSize + | |
| 84 vtableEntry::method_offset_in_bytes())); | |
| 0 | 85 if (DebugVtables) { |
| 86 Label L; | |
| 304 | 87 __ cmpptr(method, (int32_t)NULL_WORD); |
| 0 | 88 __ jcc(Assembler::equal, L); |
| 304 | 89 __ cmpptr(Address(method, methodOopDesc::from_compiled_offset()), (int32_t)NULL_WORD); |
| 0 | 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(); | |
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101 |
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102 if (PrintMiscellaneous && (WizardMode || Verbose)) { |
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103 tty->print_cr("vtable #%d at "PTR_FORMAT"[%d] left over: %d", |
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104 vtable_index, s->entry_point(), |
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105 (int)(s->code_end() - s->entry_point()), |
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106 (int)(s->code_end() - __ pc())); |
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107 } |
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108 guarantee(__ pc() <= s->code_end(), "overflowed buffer"); |
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109 |
| 0 | 110 s->set_exception_points(npe_addr, ame_addr); |
| 111 return s; | |
| 112 } | |
| 113 | |
| 114 | |
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115 VtableStub* VtableStubs::create_itable_stub(int itable_index) { |
| 0 | 116 // Note well: pd_code_size_limit is the absolute minimum we can get |
| 117 // away with. If you add code here, bump the code stub size | |
| 118 // returned by pd_code_size_limit! | |
| 119 const int amd64_code_length = VtableStub::pd_code_size_limit(false); | |
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120 VtableStub* s = new(amd64_code_length) VtableStub(false, itable_index); |
| 0 | 121 ResourceMark rm; |
| 122 CodeBuffer cb(s->entry_point(), amd64_code_length); | |
| 123 MacroAssembler* masm = new MacroAssembler(&cb); | |
| 124 | |
| 125 #ifndef PRODUCT | |
| 126 if (CountCompiledCalls) { | |
| 127 __ incrementl(ExternalAddress((address) SharedRuntime::nof_megamorphic_calls_addr())); | |
| 128 } | |
| 129 #endif | |
| 130 | |
| 131 // Entry arguments: | |
| 132 // rax: Interface | |
| 133 // j_rarg0: Receiver | |
| 134 | |
| 135 // Free registers (non-args) are rax (interface), rbx | |
| 136 | |
| 137 // get receiver (need to skip return address on top of stack) | |
| 138 | |
| 139 assert(VtableStub::receiver_location() == j_rarg0->as_VMReg(), "receiver expected in j_rarg0"); | |
| 140 // get receiver klass (also an implicit null-check) | |
| 141 address npe_addr = __ pc(); | |
| 142 | |
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143 // Most registers are in use; we'll use rax, rbx, r10, r11 |
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144 // (various calling sequences use r[cd]x, r[sd]i, r[89]; stay away from them) |
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145 __ load_klass(r10, j_rarg0); |
| 0 | 146 |
| 147 // If we take a trap while this arg is on the stack we will not | |
| 148 // be able to walk the stack properly. This is not an issue except | |
| 149 // when there are mistakes in this assembly code that could generate | |
| 150 // a spurious fault. Ask me how I know... | |
| 151 | |
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152 const Register method = rbx; |
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153 Label throw_icce; |
| 0 | 154 |
| 155 // Get methodOop and entrypoint for compiler | |
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156 __ lookup_interface_method(// inputs: rec. class, interface, itable index |
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157 r10, rax, itable_index, |
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158 // outputs: method, scan temp. reg |
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159 method, r11, |
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160 throw_icce); |
| 0 | 161 |
| 162 // method (rbx): methodOop | |
| 163 // j_rarg0: receiver | |
| 164 | |
| 165 #ifdef ASSERT | |
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166 if (DebugVtables) { |
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167 Label L2; |
| 304 | 168 __ cmpptr(method, (int32_t)NULL_WORD); |
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169 __ jcc(Assembler::equal, L2); |
| 304 | 170 __ cmpptr(Address(method, methodOopDesc::from_compiled_offset()), (int32_t)NULL_WORD); |
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171 __ jcc(Assembler::notZero, L2); |
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172 __ stop("compiler entrypoint is null"); |
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173 __ bind(L2); |
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174 } |
| 0 | 175 #endif // ASSERT |
| 176 | |
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177 // rbx: methodOop |
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178 // j_rarg0: receiver |
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179 address ame_addr = __ pc(); |
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180 __ jmp(Address(method, methodOopDesc::from_compiled_offset())); |
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181 |
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182 __ bind(throw_icce); |
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183 __ jump(RuntimeAddress(StubRoutines::throw_IncompatibleClassChangeError_entry())); |
| 0 | 184 |
| 185 __ flush(); | |
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186 |
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187 if (PrintMiscellaneous && (WizardMode || Verbose)) { |
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188 tty->print_cr("itable #%d at "PTR_FORMAT"[%d] left over: %d", |
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189 itable_index, s->entry_point(), |
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190 (int)(s->code_end() - s->entry_point()), |
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191 (int)(s->code_end() - __ pc())); |
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192 } |
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193 guarantee(__ pc() <= s->code_end(), "overflowed buffer"); |
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194 |
| 0 | 195 s->set_exception_points(npe_addr, ame_addr); |
| 196 return s; | |
| 197 } | |
| 198 | |
| 199 int VtableStub::pd_code_size_limit(bool is_vtable_stub) { | |
| 200 if (is_vtable_stub) { | |
| 201 // Vtable stub size | |
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202 return (DebugVtables ? 512 : 24) + (CountCompiledCalls ? 13 : 0) + |
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203 (UseCompressedOops ? 16 : 0); // 1 leaq can be 3 bytes + 1 long |
| 0 | 204 } else { |
| 205 // Itable stub size | |
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206 return (DebugVtables ? 512 : 72) + (CountCompiledCalls ? 13 : 0) + |
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207 (UseCompressedOops ? 32 : 0); // 2 leaqs |
| 0 | 208 } |
| 209 } | |
| 210 | |
| 211 int VtableStub::pd_code_alignment() { | |
| 212 return wordSize; | |
| 213 } |