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Add StubFailureTrampolineFrames

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In preparation of supporting stubs that deopt and then need to push their
register-based parameters to an arguments area on the stack that gets properly
collected, add StubFailureTrampolineFrames to hold those parameters.

R=mstarzinger@chromium.org

Review URL: https://chromiumcodereview.appspot.com/12052053

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@13533 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
danno@chromium.org 2013-01-29 09:12:20 +00:00
parent c31454ac37
commit a6bc16b6f3
14 changed files with 282 additions and 150 deletions
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4
src/arm/builtins-arm.cc
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@ -1272,10 +1272,8 @@ void Builtins::Generate_NotifyStubFailure(MacroAssembler* masm) {
__ ldm(ia_w, sp, kJSCallerSaved | kCalleeSaved);
}
__ mov(ip, lr); // Stash the miss continuation
__ add(sp, sp, Operand(kPointerSize)); // Ignore state
__ pop(lr); // Restore LR to continuation in JSFunction
__ mov(pc, ip); // Jump to miss handler
__ mov(pc, lr); // Jump to miss handler
}

10
src/arm/code-stubs-arm.cc
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@ -7862,6 +7862,16 @@ void StoreArrayLiteralElementStub::Generate(MacroAssembler* masm) {
}
void StubFailureTrampolineStub::Generate(MacroAssembler* masm) {
ASSERT(!Serializer::enabled());
bool save_fp_regs = CpuFeatures::IsSupported(VFP2);
CEntryStub ces(1, save_fp_regs ? kSaveFPRegs : kDontSaveFPRegs);
__ Call(ces.GetCode(), RelocInfo::CODE_TARGET);
masm->LeaveFrame(StackFrame::STUB_FAILURE_TRAMPOLINE);
__ Ret();
}
void ProfileEntryHookStub::MaybeCallEntryHook(MacroAssembler* masm) {
if (entry_hook_ != NULL) {
PredictableCodeSizeScope predictable(masm, 4 * Assembler::kInstrSize);

98
src/arm/deoptimizer-arm.cc
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@ -455,22 +455,27 @@ void Deoptimizer::DoComputeArgumentsAdaptorFrame(TranslationIterator* iterator,
void Deoptimizer::DoCompiledStubFrame(TranslationIterator* iterator,
int frame_index) {
//
// FROM TO <-fp
// FROM TO
// | .... | | .... |
// +-------------------------+ +-------------------------+
// | JSFunction continuation | | parameter 1 |
// | JSFunction continuation | | JSFunction continuation |
// +-------------------------+ +-------------------------+
// | | saved frame (fp) | | .... |
// | +=========================+<-fp +-------------------------+
// | | JSFunction context | | parameter n |
// | | saved frame (fp) | | saved frame (fp) |
// | +=========================+<-fp +=========================+<-fp
// | | JSFunction context | | JSFunction context |
// v +-------------------------+ +-------------------------|
// | COMPILED_STUB marker | | JSFunction continuation |
// +-------------------------+ +-------------------------+<-sp
// | | r0 = number of parameters
// | ... | r1 = failure handler address
// | | fp = saved frame
// +-------------------------+<-sp cp = JSFunction context
//
// | COMPILED_STUB marker | | STUB_FAILURE marker |
// +-------------------------+ +-------------------------+
// | | | stub parameter 1 |
// | ... | +-------------------------+
// | | | ... |
// |-------------------------|<-sp +-------------------------+
// | stub parameter n |
// parameters in registers +-------------------------+<-sp
// and spilled to stack r0 = number of parameters
// r1 = failure handler address
// fp = saved frame
// cp = JSFunction context
//
ASSERT(compiled_code_->kind() == Code::COMPILED_STUB);
@ -478,48 +483,65 @@ void Deoptimizer::DoCompiledStubFrame(TranslationIterator* iterator,
CodeStubInterfaceDescriptor* descriptor =
isolate_->code_stub_interface_descriptor(major_key);
int output_frame_size =
(1 + descriptor->register_param_count_) * kPointerSize;
int output_frame_size = StandardFrameConstants::kFixedFrameSize +
kPointerSize * descriptor->register_param_count_;
FrameDescription* output_frame =
new(output_frame_size) FrameDescription(output_frame_size, 0);
ASSERT(frame_index == 0);
output_[frame_index] = output_frame;
Code* notify_failure =
isolate_->builtins()->builtin(Builtins::kNotifyStubFailure);
output_frame->SetState(Smi::FromInt(FullCodeGenerator::NO_REGISTERS));
output_frame->SetContinuation(
reinterpret_cast<uint32_t>(notify_failure->entry()));
reinterpret_cast<intptr_t>(notify_failure->entry()));
Code* code;
CEntryStub(1, kSaveFPRegs).FindCodeInCache(&code, isolate_);
output_frame->SetPc(reinterpret_cast<intptr_t>(code->instruction_start()));
Code* trampoline = NULL;
StubFailureTrampolineStub().FindCodeInCache(&trampoline, isolate_);
ASSERT(trampoline != NULL);
output_frame->SetPc(reinterpret_cast<intptr_t>(
trampoline->instruction_start()));
unsigned input_frame_size = input_->GetFrameSize();
intptr_t value = input_->GetFrameSlot(input_frame_size - kPointerSize);
output_frame->SetFrameSlot(0, value);
value = input_->GetFrameSlot(input_frame_size - 2 * kPointerSize);
// JSFunction continuation
intptr_t input_frame_offset = input_frame_size - kPointerSize;
intptr_t output_frame_offset = output_frame_size - kPointerSize;
intptr_t value = input_->GetFrameSlot(input_frame_offset);
output_frame->SetFrameSlot(output_frame_offset, value);
// saved frame ptr
input_frame_offset -= kPointerSize;
value = input_->GetFrameSlot(input_frame_offset);
output_frame_offset -= kPointerSize;
output_frame->SetFrameSlot(output_frame_offset, value);
// Restore context
input_frame_offset -= kPointerSize;
value = input_->GetFrameSlot(input_frame_offset);
output_frame->SetRegister(cp.code(), value);
output_frame_offset -= kPointerSize;
output_frame->SetFrameSlot(output_frame_offset, value);
// Internal frame markers
output_frame_offset -= kPointerSize;
value = reinterpret_cast<intptr_t>(
Smi::FromInt(StackFrame::STUB_FAILURE_TRAMPOLINE));
output_frame->SetFrameSlot(output_frame_offset, value);
for (int i = 0; i < descriptor->register_param_count_; ++i) {
output_frame_offset -= kPointerSize;
DoTranslateCommand(iterator, 0, output_frame_offset);
}
value = input_->GetRegister(fp.code());
output_frame->SetRegister(fp.code(), value);
output_frame->SetFp(value);
value = input_->GetFrameSlot(input_frame_size - 3 * kPointerSize);
output_frame->SetRegister(cp.code(), value);
int parameter_offset = kPointerSize * descriptor->register_param_count_;
for (int i = 0; i < descriptor->register_param_count_; ++i) {
Translation::Opcode opcode =
static_cast<Translation::Opcode>(iterator->Next());
ASSERT(opcode == Translation::REGISTER);
USE(opcode);
int input_reg = iterator->Next();
intptr_t reg_value = input_->GetRegister(input_reg);
output_frame->SetFrameSlot(parameter_offset, reg_value);
parameter_offset -= kPointerSize;
}
ApiFunction function(descriptor->deoptimization_handler_);
ExternalReference xref(&function, ExternalReference::BUILTIN_CALL, isolate_);
intptr_t handler = reinterpret_cast<intptr_t>(xref.address());
output_frame->SetRegister(r0.code(), descriptor->register_param_count_);
output_frame->SetRegister(r1.code(), handler);
ASSERT(frame_index == 0);
output_[frame_index] = output_frame;
}

15
src/code-stubs.h
View File

@ -78,6 +78,7 @@ namespace internal {
V(StringDictionaryLookup) \
V(ElementsTransitionAndStore) \
V(StoreArrayLiteralElement) \
V(StubFailureTrampoline) \
V(ProfileEntryHook)
// List of code stubs only used on ARM platforms.
@ -1382,6 +1383,20 @@ class StoreArrayLiteralElementStub : public PlatformCodeStub {
};
class StubFailureTrampolineStub : public PlatformCodeStub {
public:
StubFailureTrampolineStub() {}
private:
Major MajorKey() { return StubFailureTrampoline; }
int MinorKey() { return 0; }
void Generate(MacroAssembler* masm);
DISALLOW_COPY_AND_ASSIGN(StubFailureTrampolineStub);
};
class ProfileEntryHookStub : public PlatformCodeStub {
public:
explicit ProfileEntryHookStub() {}

7
src/deoptimizer.cc
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@ -554,7 +554,10 @@ Deoptimizer::Deoptimizer(Isolate* isolate,
ASSERT(HEAP->allow_allocation(false));
unsigned size = ComputeInputFrameSize();
input_ = new(size) FrameDescription(size, function);
input_->SetFrameType(StackFrame::JAVA_SCRIPT);
StackFrame::Type frame_type = function == NULL
? StackFrame::STUB
: StackFrame::JAVA_SCRIPT;
input_->SetFrameType(frame_type);
}
@ -1664,6 +1667,8 @@ int FrameDescription::ComputeParametersCount() {
// Can't use GetExpression(0) because it would cause infinite recursion.
return reinterpret_cast<Smi*>(*GetFrameSlotPointer(0))->value();
}
case StackFrame::STUB:
return 0;
default:
UNREACHABLE();
return 0;

5
src/frames-inl.h
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@ -255,6 +255,11 @@ inline InternalFrame::InternalFrame(StackFrameIterator* iterator)
}
inline StubFailureTrampolineFrame::StubFailureTrampolineFrame(
StackFrameIterator* iterator) : InternalFrame(iterator) {
}
inline ConstructFrame::ConstructFrame(StackFrameIterator* iterator)
: InternalFrame(iterator) {
}

9
src/frames.cc
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@ -1303,6 +1303,15 @@ void InternalFrame::Iterate(ObjectVisitor* v) const {
}
void StubFailureTrampolineFrame::Iterate(ObjectVisitor* v) const {
const int offset = StandardFrameConstants::kContextOffset;
Object** base = &Memory::Object_at(sp());
Object** limit = &Memory::Object_at(fp() + offset) + 1;
v->VisitPointers(base, limit);
IteratePc(v, pc_address(), LookupCode());
}
// -------------------------------------------------------------------------

19
src/frames.h
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@ -137,6 +137,7 @@ class StackHandler BASE_EMBEDDED {
V(JAVA_SCRIPT, JavaScriptFrame) \
V(OPTIMIZED, OptimizedFrame) \
V(STUB, StubFrame) \
V(STUB_FAILURE_TRAMPOLINE, StubFailureTrampolineFrame) \
V(INTERNAL, InternalFrame) \
V(CONSTRUCT, ConstructFrame) \
V(ARGUMENTS_ADAPTOR, ArgumentsAdaptorFrame)
@ -194,6 +195,9 @@ class StackFrame BASE_EMBEDDED {
bool is_optimized() const { return type() == OPTIMIZED; }
bool is_arguments_adaptor() const { return type() == ARGUMENTS_ADAPTOR; }
bool is_internal() const { return type() == INTERNAL; }
bool is_stub_failure_trampoline() const {
return type() == STUB_FAILURE_TRAMPOLINE;
}
bool is_construct() const { return type() == CONSTRUCT; }
virtual bool is_standard() const { return false; }
@ -668,6 +672,21 @@ class InternalFrame: public StandardFrame {
};
class StubFailureTrampolineFrame: public InternalFrame {
public:
virtual Type type() const { return STUB_FAILURE_TRAMPOLINE; }
virtual void Iterate(ObjectVisitor* v) const;
protected:
inline explicit StubFailureTrampolineFrame(
StackFrameIterator* iterator);
private:
friend class StackFrameIterator;
};
// Construct frames are special trampoline frames introduced to handle
// function invocations through 'new'.
class ConstructFrame: public InternalFrame {

10
src/ia32/code-stubs-ia32.cc
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@ -7629,6 +7629,16 @@ void StoreArrayLiteralElementStub::Generate(MacroAssembler* masm) {
}
void StubFailureTrampolineStub::Generate(MacroAssembler* masm) {
ASSERT(!Serializer::enabled());
bool save_fp_regs = CpuFeatures::IsSupported(SSE2);
CEntryStub ces(1, save_fp_regs ? kSaveFPRegs : kDontSaveFPRegs);
__ call(ces.GetCode(), RelocInfo::CODE_TARGET);
masm->LeaveFrame(StackFrame::STUB_FAILURE_TRAMPOLINE);
__ ret(0); // Return to IC Miss stub, continuation still on stack.
}
void ProfileEntryHookStub::MaybeCallEntryHook(MacroAssembler* masm) {
if (entry_hook_ != NULL) {
ProfileEntryHookStub stub;

100
src/ia32/deoptimizer-ia32.cc
View File

@ -562,22 +562,27 @@ void Deoptimizer::DoComputeArgumentsAdaptorFrame(TranslationIterator* iterator,
void Deoptimizer::DoCompiledStubFrame(TranslationIterator* iterator,
int frame_index) {
//
// FROM TO <-ebp
// FROM TO
// | .... | | .... |
// +-------------------------+ +-------------------------+
// | JSFunction continuation | | parameter 1 |
// | JSFunction continuation | | JSFunction continuation |
// +-------------------------+ +-------------------------+
// | | saved frame (ebp) | | .... |
// | +=========================+<-ebp +-------------------------+
// | | JSFunction context | | parameter n |
// | | saved frame (ebp) | | saved frame (ebp) |
// | +=========================+<-ebp +=========================+<-ebp
// | | JSFunction context | | JSFunction context |
// v +-------------------------+ +-------------------------|
// | COMPILED_STUB marker | | JSFunction continuation |
// +-------------------------+ +-------------------------+<-esp
// | | eax = number of parameters
// | ... | ebx = failure handler address
// | | ebp = saved frame
// +-------------------------+<-esp esi = JSFunction context
//
// | COMPILED_STUB marker | | STUB_FAILURE marker |
// +-------------------------+ +-------------------------+
// | | | stub parameter 1 |
// | ... | +-------------------------+
// | | | ... |
// |-------------------------|<-esp +-------------------------+
// | stub parameter n |
// parameters in registers +-------------------------+<-esp
// and spilled to stack eax = number of parameters
// ebx = failure handler address
// ebp = saved frame
// esi = JSFunction context
//
ASSERT(compiled_code_->kind() == Code::COMPILED_STUB);
@ -585,49 +590,64 @@ void Deoptimizer::DoCompiledStubFrame(TranslationIterator* iterator,
CodeStubInterfaceDescriptor* descriptor =
isolate_->code_stub_interface_descriptor(major_key);
int output_frame_size =
(1 + descriptor->register_param_count_) * kPointerSize;
int output_frame_size = StandardFrameConstants::kFixedFrameSize +
kPointerSize * descriptor->register_param_count_;
FrameDescription* output_frame =
new(output_frame_size) FrameDescription(output_frame_size, 0);
ASSERT(frame_index == 0);
output_[frame_index] = output_frame;
Code* notify_failure =
isolate_->builtins()->builtin(Builtins::kNotifyStubFailure);
output_frame->SetState(Smi::FromInt(FullCodeGenerator::NO_REGISTERS));
output_frame->SetContinuation(
reinterpret_cast<uint32_t>(notify_failure->entry()));
reinterpret_cast<intptr_t>(notify_failure->entry()));
Code* code;
SaveFPRegsMode mode =
CpuFeatures::IsSupported(SSE2) ? kSaveFPRegs : kDontSaveFPRegs;
CEntryStub(1, mode).FindCodeInCache(&code, isolate_);
output_frame->SetPc(reinterpret_cast<intptr_t>(code->instruction_start()));
Code* trampoline = NULL;
StubFailureTrampolineStub().FindCodeInCache(&trampoline, isolate_);
ASSERT(trampoline != NULL);
output_frame->SetPc(reinterpret_cast<intptr_t>(
trampoline->instruction_start()));
unsigned input_frame_size = input_->GetFrameSize();
intptr_t value = input_->GetFrameSlot(input_frame_size - kPointerSize);
output_frame->SetFrameSlot(0, value);
value = input_->GetFrameSlot(input_frame_size - 2 * kPointerSize);
// JSFunction continuation
intptr_t input_frame_offset = input_frame_size - kPointerSize;
intptr_t output_frame_offset = output_frame_size - kPointerSize;
intptr_t value = input_->GetFrameSlot(input_frame_offset);
output_frame->SetFrameSlot(output_frame_offset, value);
// saved frame ptr
input_frame_offset -= kPointerSize;
value = input_->GetFrameSlot(input_frame_offset);
output_frame_offset -= kPointerSize;
output_frame->SetFrameSlot(output_frame_offset, value);
// Restore context
input_frame_offset -= kPointerSize;
value = input_->GetFrameSlot(input_frame_offset);
output_frame->SetRegister(esi.code(), value);
output_frame_offset -= kPointerSize;
output_frame->SetFrameSlot(output_frame_offset, value);
// Internal frame markers
output_frame_offset -= kPointerSize;
value = reinterpret_cast<intptr_t>(
Smi::FromInt(StackFrame::STUB_FAILURE_TRAMPOLINE));
output_frame->SetFrameSlot(output_frame_offset, value);
for (int i = 0; i < descriptor->register_param_count_; ++i) {
output_frame_offset -= kPointerSize;
DoTranslateCommand(iterator, 0, output_frame_offset);
}
value = input_->GetRegister(ebp.code());
output_frame->SetRegister(ebp.code(), value);
output_frame->SetFp(value);
value = input_->GetFrameSlot(input_frame_size - 3 * kPointerSize);
output_frame->SetRegister(esi.code(), value);
int parameter_offset = kPointerSize * descriptor->register_param_count_;
for (int i = 0; i < descriptor->register_param_count_; ++i) {
Translation::Opcode opcode =
static_cast<Translation::Opcode>(iterator->Next());
ASSERT(opcode == Translation::REGISTER);
USE(opcode);
int input_reg = iterator->Next();
intptr_t reg_value = input_->GetRegister(input_reg);
output_frame->SetFrameSlot(parameter_offset, reg_value);
parameter_offset -= kPointerSize;
}
intptr_t handler =
reinterpret_cast<intptr_t>(descriptor->deoptimization_handler_);
output_frame->SetRegister(eax.code(), descriptor->register_param_count_);
output_frame->SetRegister(ebx.code(), handler);
ASSERT(frame_index == 0);
output_[frame_index] = output_frame;
}

27
src/ic.cc
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@ -112,30 +112,15 @@ void IC::TraceIC(const char* type,
IC::IC(FrameDepth depth, Isolate* isolate) : isolate_(isolate) {
ASSERT(isolate == Isolate::Current());
// To improve the performance of the (much used) IC code, we unfold
// a few levels of the stack frame iteration code. This yields a
// ~35% speedup when running DeltaBlue with the '--nouse-ic' flag.
const Address entry =
Isolate::c_entry_fp(isolate->thread_local_top());
Address* pc_address =
reinterpret_cast<Address*>(entry + ExitFrameConstants::kCallerPCOffset);
Address fp = Memory::Address_at(entry + ExitFrameConstants::kCallerFPOffset);
// If there's another JavaScript frame on the stack, we need to look
// one frame further down the stack to find the frame pointer and
// the return address stack slot.
if (depth == EXTRA_CALL_FRAME) {
const int kCallerPCOffset = StandardFrameConstants::kCallerPCOffset;
pc_address = reinterpret_cast<Address*>(fp + kCallerPCOffset);
fp = Memory::Address_at(fp + StandardFrameConstants::kCallerFPOffset);
}
#ifdef DEBUG
StackFrameIterator it;
for (int i = 0; i < depth + 1; i++) it.Advance();
// Skip StubFailureTrampolineFrames
if (it.frame()->is_stub_failure_trampoline()) {
it.Advance();
}
StackFrame* frame = it.frame();
ASSERT(fp == frame->fp() && pc_address == frame->pc_address());
#endif
fp_ = fp;
pc_address_ = pc_address;
fp_ = frame->fp();
pc_address_ = frame->pc_address();
}

3
src/isolate.cc
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@ -2093,6 +2093,9 @@ bool Isolate::Init(Deserializer* des) {
Deoptimizer::EnsureCodeForDeoptimizationEntry(
Deoptimizer::LAZY,
kDeoptTableSerializeEntryCount - 1);
// Ensure that the stub failure trampoline has been generated.
StubFailureTrampolineStub().GetCode();
}
if (FLAG_parallel_recompilation) optimizing_compiler_thread_.Start();

9
src/x64/code-stubs-x64.cc
View File

@ -6619,6 +6619,15 @@ void StoreArrayLiteralElementStub::Generate(MacroAssembler* masm) {
}
void StubFailureTrampolineStub::Generate(MacroAssembler* masm) {
ASSERT(!Serializer::enabled());
CEntryStub ces(1, kSaveFPRegs);
__ Call(ces.GetCode(), RelocInfo::CODE_TARGET);
masm->LeaveFrame(StackFrame::STUB_FAILURE_TRAMPOLINE);
__ ret(0); // Return to IC Miss stub, continuation still on stack.
}
void ProfileEntryHookStub::MaybeCallEntryHook(MacroAssembler* masm) {
if (entry_hook_ != NULL) {
ProfileEntryHookStub stub;

96
src/x64/deoptimizer-x64.cc
View File

@ -451,22 +451,27 @@ void Deoptimizer::DoComputeArgumentsAdaptorFrame(TranslationIterator* iterator,
void Deoptimizer::DoCompiledStubFrame(TranslationIterator* iterator,
int frame_index) {
//
// FROM TO <-rbp
// FROM TO
// | .... | | .... |
// +-------------------------+ +-------------------------+
// | JSFunction continuation | | parameter 1 |
// | JSFunction continuation | | JSFunction continuation |
// +-------------------------+ +-------------------------+
// | | saved frame (rbp) | | .... |
// | +=========================+<-rbp +-------------------------+
// | | JSFunction context | | parameter n |
// | | saved frame (rbp) | | saved frame (rbp) |
// | +=========================+<-rbp +=========================+<-rbp
// | | JSFunction context | | JSFunction context |
// v +-------------------------+ +-------------------------|
// | COMPILED_STUB marker | | JSFunction continuation |
// +-------------------------+ +-------------------------+<-rsp
// | | rax = number of parameters
// | ... | rbx = failure handler address
// | | rbp = saved frame
// +-------------------------+<-rsp rsi = JSFunction context
//
// | COMPILED_STUB marker | | STUB_FAILURE marker |
// +-------------------------+ +-------------------------+
// | | | stub parameter 1 |
// | ... | +-------------------------+
// | | | ... |
// |-------------------------|<-rsp +-------------------------+
// | stub parameter n |
// parameters in registers +-------------------------+<-rsp
// and spilled to stack rax = number of parameters
// rbx = failure handler address
// rbp = saved frame
// rsi = JSFunction context
//
ASSERT(compiled_code_->kind() == Code::COMPILED_STUB);
@ -474,47 +479,64 @@ void Deoptimizer::DoCompiledStubFrame(TranslationIterator* iterator,
CodeStubInterfaceDescriptor* descriptor =
isolate_->code_stub_interface_descriptor(major_key);
int output_frame_size =
(1 + descriptor->register_param_count_) * kPointerSize;
int output_frame_size = StandardFrameConstants::kFixedFrameSize +
kPointerSize * descriptor->register_param_count_;
FrameDescription* output_frame =
new(output_frame_size) FrameDescription(output_frame_size, 0);
ASSERT(frame_index == 0);
output_[frame_index] = output_frame;
Code* notify_failure =
isolate_->builtins()->builtin(Builtins::kNotifyStubFailure);
output_frame->SetState(Smi::FromInt(FullCodeGenerator::NO_REGISTERS));
output_frame->SetContinuation(
reinterpret_cast<intptr_t>(notify_failure->entry()));
Code* code;
CEntryStub(1, kDontSaveFPRegs).FindCodeInCache(&code, isolate_);
output_frame->SetPc(reinterpret_cast<intptr_t>(code->instruction_start()));
Code* trampoline = NULL;
StubFailureTrampolineStub().FindCodeInCache(&trampoline, isolate_);
ASSERT(trampoline != NULL);
output_frame->SetPc(reinterpret_cast<intptr_t>(
trampoline->instruction_start()));
unsigned input_frame_size = input_->GetFrameSize();
intptr_t value = input_->GetFrameSlot(input_frame_size - kPointerSize);
output_frame->SetFrameSlot(0, value);
value = input_->GetFrameSlot(input_frame_size - 2 * kPointerSize);
// JSFunction continuation
intptr_t input_frame_offset = input_frame_size - kPointerSize;
intptr_t output_frame_offset = output_frame_size - kPointerSize;
intptr_t value = input_->GetFrameSlot(input_frame_offset);
output_frame->SetFrameSlot(output_frame_offset, value);
// saved frame ptr
input_frame_offset -= kPointerSize;
value = input_->GetFrameSlot(input_frame_offset);
output_frame_offset -= kPointerSize;
output_frame->SetFrameSlot(output_frame_offset, value);
// Restore context
input_frame_offset -= kPointerSize;
value = input_->GetFrameSlot(input_frame_offset);
output_frame->SetRegister(rsi.code(), value);
output_frame_offset -= kPointerSize;
output_frame->SetFrameSlot(output_frame_offset, value);
// Internal frame markers
output_frame_offset -= kPointerSize;
value = reinterpret_cast<intptr_t>(
Smi::FromInt(StackFrame::STUB_FAILURE_TRAMPOLINE));
output_frame->SetFrameSlot(output_frame_offset, value);
for (int i = 0; i < descriptor->register_param_count_; ++i) {
output_frame_offset -= kPointerSize;
DoTranslateCommand(iterator, 0, output_frame_offset);
}
value = input_->GetRegister(rbp.code());
output_frame->SetRegister(rbp.code(), value);
output_frame->SetFp(value);
value = input_->GetFrameSlot(input_frame_size - 3 * kPointerSize);
output_frame->SetRegister(rsi.code(), value);
int parameter_offset = kPointerSize * descriptor->register_param_count_;
for (int i = 0; i < descriptor->register_param_count_; ++i) {
Translation::Opcode opcode =
static_cast<Translation::Opcode>(iterator->Next());
ASSERT(opcode == Translation::REGISTER);
USE(opcode);
int input_reg = iterator->Next();
intptr_t reg_value = input_->GetRegister(input_reg);
output_frame->SetFrameSlot(parameter_offset, reg_value);
parameter_offset -= kPointerSize;
}
intptr_t handler =
reinterpret_cast<intptr_t>(descriptor->deoptimization_handler_);
output_frame->SetRegister(rax.code(), descriptor->register_param_count_);
output_frame->SetRegister(rbx.code(), handler);
ASSERT(frame_index == 0);
output_[frame_index] = output_frame;
}