Mercurial > hg > graal-jvmci-8
annotate src/cpu/x86/vm/vtableStubs_x86_32.cpp @ 628:7bb995fbd3c0
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date | Thu, 12 Mar 2009 18:16:36 -0700 |
parents | 9adddb8c0fc8 |
children | 1d037ecd7960 |
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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 } |