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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 the V8 project authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "src/v8.h" | 5 #include "src/v8.h" |
6 | 6 |
7 #if V8_TARGET_ARCH_IA32 | 7 #if V8_TARGET_ARCH_IA32 |
8 | 8 |
9 #include "src/code-factory.h" | 9 #include "src/code-factory.h" |
10 #include "src/code-stubs.h" | 10 #include "src/code-stubs.h" |
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88 // o edi: the JS function object being called (i.e. ourselves) | 88 // o edi: the JS function object being called (i.e. ourselves) |
89 // o esi: our context | 89 // o esi: our context |
90 // o ebp: our caller's frame pointer | 90 // o ebp: our caller's frame pointer |
91 // o esp: stack pointer (pointing to return address) | 91 // o esp: stack pointer (pointing to return address) |
92 // | 92 // |
93 // The function builds a JS frame. Please see JavaScriptFrameConstants in | 93 // The function builds a JS frame. Please see JavaScriptFrameConstants in |
94 // frames-ia32.h for its layout. | 94 // frames-ia32.h for its layout. |
95 void FullCodeGenerator::Generate() { | 95 void FullCodeGenerator::Generate() { |
96 CompilationInfo* info = info_; | 96 CompilationInfo* info = info_; |
97 handler_table_ = | 97 handler_table_ = |
98 isolate()->factory()->NewFixedArray(function()->handler_count(), TENURED); | 98 Handle<HandlerTable>::cast(isolate()->factory()->NewFixedArray( |
| 99 HandlerTable::LengthForRange(function()->handler_count()), TENURED)); |
99 | 100 |
100 profiling_counter_ = isolate()->factory()->NewCell( | 101 profiling_counter_ = isolate()->factory()->NewCell( |
101 Handle<Smi>(Smi::FromInt(FLAG_interrupt_budget), isolate())); | 102 Handle<Smi>(Smi::FromInt(FLAG_interrupt_budget), isolate())); |
102 SetFunctionPosition(function()); | 103 SetFunctionPosition(function()); |
103 Comment cmnt(masm_, "[ function compiled by full code generator"); | 104 Comment cmnt(masm_, "[ function compiled by full code generator"); |
104 | 105 |
105 ProfileEntryHookStub::MaybeCallEntryHook(masm_); | 106 ProfileEntryHookStub::MaybeCallEntryHook(masm_); |
106 | 107 |
107 #ifdef DEBUG | 108 #ifdef DEBUG |
108 if (strlen(FLAG_stop_at) > 0 && | 109 if (strlen(FLAG_stop_at) > 0 && |
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2114 Label l_next, l_call, l_loop; | 2115 Label l_next, l_call, l_loop; |
2115 Register load_receiver = LoadDescriptor::ReceiverRegister(); | 2116 Register load_receiver = LoadDescriptor::ReceiverRegister(); |
2116 Register load_name = LoadDescriptor::NameRegister(); | 2117 Register load_name = LoadDescriptor::NameRegister(); |
2117 | 2118 |
2118 // Initial send value is undefined. | 2119 // Initial send value is undefined. |
2119 __ mov(eax, isolate()->factory()->undefined_value()); | 2120 __ mov(eax, isolate()->factory()->undefined_value()); |
2120 __ jmp(&l_next); | 2121 __ jmp(&l_next); |
2121 | 2122 |
2122 // catch (e) { receiver = iter; f = 'throw'; arg = e; goto l_call; } | 2123 // catch (e) { receiver = iter; f = 'throw'; arg = e; goto l_call; } |
2123 __ bind(&l_catch); | 2124 __ bind(&l_catch); |
2124 handler_table()->set(expr->index(), Smi::FromInt(l_catch.pos())); | |
2125 __ mov(load_name, isolate()->factory()->throw_string()); // "throw" | 2125 __ mov(load_name, isolate()->factory()->throw_string()); // "throw" |
2126 __ push(load_name); // "throw" | 2126 __ push(load_name); // "throw" |
2127 __ push(Operand(esp, 2 * kPointerSize)); // iter | 2127 __ push(Operand(esp, 2 * kPointerSize)); // iter |
2128 __ push(eax); // exception | 2128 __ push(eax); // exception |
2129 __ jmp(&l_call); | 2129 __ jmp(&l_call); |
2130 | 2130 |
2131 // try { received = %yield result } | 2131 // try { received = %yield result } |
2132 // Shuffle the received result above a try handler and yield it without | 2132 // Shuffle the received result above a try handler and yield it without |
2133 // re-boxing. | 2133 // re-boxing. |
2134 __ bind(&l_try); | 2134 __ bind(&l_try); |
2135 __ pop(eax); // result | 2135 __ pop(eax); // result |
2136 __ PushTryHandler(StackHandler::CATCH, expr->index()); | 2136 EnterTryBlock(expr->index(), &l_catch); |
2137 const int handler_size = StackHandlerConstants::kSize; | 2137 const int try_block_size = TryCatch::kElementCount * kPointerSize; |
2138 __ push(eax); // result | 2138 __ push(eax); // result |
2139 __ jmp(&l_suspend); | 2139 __ jmp(&l_suspend); |
2140 __ bind(&l_continuation); | 2140 __ bind(&l_continuation); |
2141 __ jmp(&l_resume); | 2141 __ jmp(&l_resume); |
2142 __ bind(&l_suspend); | 2142 __ bind(&l_suspend); |
2143 const int generator_object_depth = kPointerSize + handler_size; | 2143 const int generator_object_depth = kPointerSize + try_block_size; |
2144 __ mov(eax, Operand(esp, generator_object_depth)); | 2144 __ mov(eax, Operand(esp, generator_object_depth)); |
2145 __ push(eax); // g | 2145 __ push(eax); // g |
| 2146 __ push(Immediate(Smi::FromInt(expr->index()))); // handler-index |
2146 DCHECK(l_continuation.pos() > 0 && Smi::IsValid(l_continuation.pos())); | 2147 DCHECK(l_continuation.pos() > 0 && Smi::IsValid(l_continuation.pos())); |
2147 __ mov(FieldOperand(eax, JSGeneratorObject::kContinuationOffset), | 2148 __ mov(FieldOperand(eax, JSGeneratorObject::kContinuationOffset), |
2148 Immediate(Smi::FromInt(l_continuation.pos()))); | 2149 Immediate(Smi::FromInt(l_continuation.pos()))); |
2149 __ mov(FieldOperand(eax, JSGeneratorObject::kContextOffset), esi); | 2150 __ mov(FieldOperand(eax, JSGeneratorObject::kContextOffset), esi); |
2150 __ mov(ecx, esi); | 2151 __ mov(ecx, esi); |
2151 __ RecordWriteField(eax, JSGeneratorObject::kContextOffset, ecx, edx, | 2152 __ RecordWriteField(eax, JSGeneratorObject::kContextOffset, ecx, edx, |
2152 kDontSaveFPRegs); | 2153 kDontSaveFPRegs); |
2153 __ CallRuntime(Runtime::kSuspendJSGeneratorObject, 1); | 2154 __ CallRuntime(Runtime::kSuspendJSGeneratorObject, 2); |
2154 __ mov(context_register(), | 2155 __ mov(context_register(), |
2155 Operand(ebp, StandardFrameConstants::kContextOffset)); | 2156 Operand(ebp, StandardFrameConstants::kContextOffset)); |
2156 __ pop(eax); // result | 2157 __ pop(eax); // result |
2157 EmitReturnSequence(); | 2158 EmitReturnSequence(); |
2158 __ bind(&l_resume); // received in eax | 2159 __ bind(&l_resume); // received in eax |
2159 __ PopTryHandler(); | 2160 ExitTryBlock(expr->index()); |
2160 | 2161 |
2161 // receiver = iter; f = iter.next; arg = received; | 2162 // receiver = iter; f = iter.next; arg = received; |
2162 __ bind(&l_next); | 2163 __ bind(&l_next); |
2163 | 2164 |
2164 __ mov(load_name, isolate()->factory()->next_string()); | 2165 __ mov(load_name, isolate()->factory()->next_string()); |
2165 __ push(load_name); // "next" | 2166 __ push(load_name); // "next" |
2166 __ push(Operand(esp, 2 * kPointerSize)); // iter | 2167 __ push(Operand(esp, 2 * kPointerSize)); // iter |
2167 __ push(eax); // received | 2168 __ push(eax); // received |
2168 | 2169 |
2169 // result = receiver[f](arg); | 2170 // result = receiver[f](arg); |
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5276 // Uncook return address. | 5277 // Uncook return address. |
5277 __ pop(edx); | 5278 __ pop(edx); |
5278 __ SmiUntag(edx); | 5279 __ SmiUntag(edx); |
5279 __ add(edx, Immediate(masm_->CodeObject())); | 5280 __ add(edx, Immediate(masm_->CodeObject())); |
5280 __ jmp(edx); | 5281 __ jmp(edx); |
5281 } | 5282 } |
5282 | 5283 |
5283 | 5284 |
5284 #undef __ | 5285 #undef __ |
5285 | 5286 |
5286 #define __ ACCESS_MASM(masm()) | |
5287 | |
5288 FullCodeGenerator::NestedStatement* FullCodeGenerator::TryFinally::Exit( | |
5289 int* stack_depth, | |
5290 int* context_length) { | |
5291 // The macros used here must preserve the result register. | |
5292 | |
5293 // Because the handler block contains the context of the finally | |
5294 // code, we can restore it directly from there for the finally code | |
5295 // rather than iteratively unwinding contexts via their previous | |
5296 // links. | |
5297 __ Drop(*stack_depth); // Down to the handler block. | |
5298 if (*context_length > 0) { | |
5299 // Restore the context to its dedicated register and the stack. | |
5300 __ mov(esi, Operand(esp, StackHandlerConstants::kContextOffset)); | |
5301 __ mov(Operand(ebp, StandardFrameConstants::kContextOffset), esi); | |
5302 } | |
5303 __ PopTryHandler(); | |
5304 __ call(finally_entry_); | |
5305 | |
5306 *stack_depth = 0; | |
5307 *context_length = 0; | |
5308 return previous_; | |
5309 } | |
5310 | |
5311 #undef __ | |
5312 | |
5313 | 5287 |
5314 static const byte kJnsInstruction = 0x79; | 5288 static const byte kJnsInstruction = 0x79; |
5315 static const byte kJnsOffset = 0x11; | 5289 static const byte kJnsOffset = 0x11; |
5316 static const byte kNopByteOne = 0x66; | 5290 static const byte kNopByteOne = 0x66; |
5317 static const byte kNopByteTwo = 0x90; | 5291 static const byte kNopByteTwo = 0x90; |
5318 #ifdef DEBUG | 5292 #ifdef DEBUG |
5319 static const byte kCallInstruction = 0xe8; | 5293 static const byte kCallInstruction = 0xe8; |
5320 #endif | 5294 #endif |
5321 | 5295 |
5322 | 5296 |
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5384 DCHECK_EQ(isolate->builtins()->OsrAfterStackCheck()->entry(), | 5358 DCHECK_EQ(isolate->builtins()->OsrAfterStackCheck()->entry(), |
5385 Assembler::target_address_at(call_target_address, | 5359 Assembler::target_address_at(call_target_address, |
5386 unoptimized_code)); | 5360 unoptimized_code)); |
5387 return OSR_AFTER_STACK_CHECK; | 5361 return OSR_AFTER_STACK_CHECK; |
5388 } | 5362 } |
5389 | 5363 |
5390 | 5364 |
5391 } } // namespace v8::internal | 5365 } } // namespace v8::internal |
5392 | 5366 |
5393 #endif // V8_TARGET_ARCH_IA32 | 5367 #endif // V8_TARGET_ARCH_IA32 |
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