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Unify deoptimizer for construct stub frames.

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This unifies the translation of artificial construct stub frames. The
frame layout is almost the same on all architectures and only differs
in the presence of a slot holding the constructor function.

R=svenpanne@chromium.org

Review URL: https://codereview.chromium.org/12379042

git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@13843 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
mstarzinger@chromium.org 2013-03-06 16:12:24 +00:00
parent 07e2494735
commit 2b7891c303
9 changed files with 197 additions and 477 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

122
src/arm/deoptimizer-arm.cc
View File

@ -537,128 +537,6 @@ void Deoptimizer::DoComputeCompiledStubFrame(TranslationIterator* iterator,
}
void Deoptimizer::DoComputeConstructStubFrame(TranslationIterator* iterator,
int frame_index) {
Builtins* builtins = isolate_->builtins();
Code* construct_stub = builtins->builtin(Builtins::kJSConstructStubGeneric);
JSFunction* function = JSFunction::cast(ComputeLiteral(iterator->Next()));
unsigned height = iterator->Next();
unsigned height_in_bytes = height * kPointerSize;
if (FLAG_trace_deopt) {
PrintF(" translating construct stub => height=%d\n", height_in_bytes);
}
unsigned fixed_frame_size = 8 * kPointerSize;
unsigned output_frame_size = height_in_bytes + fixed_frame_size;
// Allocate and store the output frame description.
FrameDescription* output_frame =
new(output_frame_size) FrameDescription(output_frame_size, function);
output_frame->SetFrameType(StackFrame::CONSTRUCT);
// Construct stub can not be topmost or bottommost.
ASSERT(frame_index > 0 && frame_index < output_count_ - 1);
ASSERT(output_[frame_index] == NULL);
output_[frame_index] = output_frame;
// The top address of the frame is computed from the previous
// frame's top and this frame's size.
uint32_t top_address;
top_address = output_[frame_index - 1]->GetTop() - output_frame_size;
output_frame->SetTop(top_address);
// Compute the incoming parameter translation.
int parameter_count = height;
unsigned output_offset = output_frame_size;
for (int i = 0; i < parameter_count; ++i) {
output_offset -= kPointerSize;
DoTranslateCommand(iterator, frame_index, output_offset);
}
// Read caller's PC from the previous frame.
output_offset -= kPointerSize;
intptr_t callers_pc = output_[frame_index - 1]->GetPc();
output_frame->SetFrameSlot(output_offset, callers_pc);
if (FLAG_trace_deopt) {
PrintF(" 0x%08x: [top + %d] <- 0x%08x ; caller's pc\n",
top_address + output_offset, output_offset, callers_pc);
}
// Read caller's FP from the previous frame, and set this frame's FP.
output_offset -= kPointerSize;
intptr_t value = output_[frame_index - 1]->GetFp();
output_frame->SetFrameSlot(output_offset, value);
intptr_t fp_value = top_address + output_offset;
output_frame->SetFp(fp_value);
if (trace_) {
PrintF(" 0x%08x: [top + %d] <- 0x%08x ; caller's fp\n",
fp_value, output_offset, value);
}
// The context can be gotten from the previous frame.
output_offset -= kPointerSize;
value = output_[frame_index - 1]->GetContext();
output_frame->SetFrameSlot(output_offset, value);
if (trace_) {
PrintF(" 0x%08x: [top + %d] <- 0x%08x ; context\n",
top_address + output_offset, output_offset, value);
}
// A marker value is used in place of the function.
output_offset -= kPointerSize;
value = reinterpret_cast<intptr_t>(Smi::FromInt(StackFrame::CONSTRUCT));
output_frame->SetFrameSlot(output_offset, value);
if (trace_) {
PrintF(" 0x%08x: [top + %d] <- 0x%08x ; function (construct sentinel)\n",
top_address + output_offset, output_offset, value);
}
// The output frame reflects a JSConstructStubGeneric frame.
output_offset -= kPointerSize;
value = reinterpret_cast<intptr_t>(construct_stub);
output_frame->SetFrameSlot(output_offset, value);
if (trace_) {
PrintF(" 0x%08x: [top + %d] <- 0x%08x ; code object\n",
top_address + output_offset, output_offset, value);
}
// Number of incoming arguments.
output_offset -= kPointerSize;
value = reinterpret_cast<uint32_t>(Smi::FromInt(height - 1));
output_frame->SetFrameSlot(output_offset, value);
if (trace_) {
PrintF(" 0x%08x: [top + %d] <- 0x%08x ; argc (%d)\n",
top_address + output_offset, output_offset, value, height - 1);
}
// Constructor function being invoked by the stub.
output_offset -= kPointerSize;
value = reinterpret_cast<intptr_t>(function);
output_frame->SetFrameSlot(output_offset, value);
if (trace_) {
PrintF(" 0x%08x: [top + %d] <- 0x%08x ; constructor function\n",
top_address + output_offset, output_offset, value);
}
// The newly allocated object was passed as receiver in the artificial
// constructor stub environment created by HEnvironment::CopyForInlining().
output_offset -= kPointerSize;
value = output_frame->GetFrameSlot(output_frame_size - kPointerSize);
output_frame->SetFrameSlot(output_offset, value);
if (trace_) {
PrintF(" 0x%08x: [top + %d] <- 0x%08x ; allocated receiver\n",
top_address + output_offset, output_offset, value);
}
ASSERT(0 == output_offset);
uint32_t pc = reinterpret_cast<uint32_t>(
construct_stub->instruction_start() +
isolate_->heap()->construct_stub_deopt_pc_offset()->value());
output_frame->SetPc(pc);
}
// This code is very similar to ia32 code, but relies on register names (fp, sp)
// and how the frame is laid out.
void Deoptimizer::DoComputeJSFrame(TranslationIterator* iterator,

16
src/arm/frames-arm.h
View File

@ -149,14 +149,30 @@ class JavaScriptFrameConstants : public AllStatic {
class ArgumentsAdaptorFrameConstants : public AllStatic {
public:
// FP-relative.
static const int kLengthOffset = StandardFrameConstants::kExpressionsOffset;
static const int kFrameSize =
StandardFrameConstants::kFixedFrameSize + kPointerSize;
};
class ConstructFrameConstants : public AllStatic {
public:
// FP-relative.
static const int kImplicitReceiverOffset = -6 * kPointerSize;
static const int kConstructorOffset = -5 * kPointerSize;
static const int kLengthOffset = -4 * kPointerSize;
static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset;
static const int kFrameSize =
StandardFrameConstants::kFixedFrameSize + 4 * kPointerSize;
};
class InternalFrameConstants : public AllStatic {
public:
// FP-relative.
static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset;
};

133
src/deoptimizer.cc
View File

@ -922,6 +922,139 @@ void Deoptimizer::DoComputeArgumentsAdaptorFrame(TranslationIterator* iterator,
}
void Deoptimizer::DoComputeConstructStubFrame(TranslationIterator* iterator,
int frame_index) {
Builtins* builtins = isolate_->builtins();
Code* construct_stub = builtins->builtin(Builtins::kJSConstructStubGeneric);
JSFunction* function = JSFunction::cast(ComputeLiteral(iterator->Next()));
unsigned height = iterator->Next();
unsigned height_in_bytes = height * kPointerSize;
if (trace_) {
PrintF(" translating construct stub => height=%d\n", height_in_bytes);
}
unsigned fixed_frame_size = ConstructFrameConstants::kFrameSize;
unsigned output_frame_size = height_in_bytes + fixed_frame_size;
// Allocate and store the output frame description.
FrameDescription* output_frame =
new(output_frame_size) FrameDescription(output_frame_size, function);
output_frame->SetFrameType(StackFrame::CONSTRUCT);
// Construct stub can not be topmost or bottommost.
ASSERT(frame_index > 0 && frame_index < output_count_ - 1);
ASSERT(output_[frame_index] == NULL);
output_[frame_index] = output_frame;
// The top address of the frame is computed from the previous
// frame's top and this frame's size.
intptr_t top_address;
top_address = output_[frame_index - 1]->GetTop() - output_frame_size;
output_frame->SetTop(top_address);
// Compute the incoming parameter translation.
int parameter_count = height;
unsigned output_offset = output_frame_size;
for (int i = 0; i < parameter_count; ++i) {
output_offset -= kPointerSize;
DoTranslateCommand(iterator, frame_index, output_offset);
}
// Read caller's PC from the previous frame.
output_offset -= kPointerSize;
intptr_t callers_pc = output_[frame_index - 1]->GetPc();
output_frame->SetFrameSlot(output_offset, callers_pc);
if (trace_) {
PrintF(" 0x%08" V8PRIxPTR ": [top + %d] <- 0x%08"
V8PRIxPTR " ; caller's pc\n",
top_address + output_offset, output_offset, callers_pc);
}
// Read caller's FP from the previous frame, and set this frame's FP.
output_offset -= kPointerSize;
intptr_t value = output_[frame_index - 1]->GetFp();
output_frame->SetFrameSlot(output_offset, value);
intptr_t fp_value = top_address + output_offset;
output_frame->SetFp(fp_value);
if (trace_) {
PrintF(" 0x%08" V8PRIxPTR ": [top + %d] <- 0x%08"
V8PRIxPTR " ; caller's fp\n",
fp_value, output_offset, value);
}
// The context can be gotten from the previous frame.
output_offset -= kPointerSize;
value = output_[frame_index - 1]->GetContext();
output_frame->SetFrameSlot(output_offset, value);
if (trace_) {
PrintF(" 0x%08" V8PRIxPTR ": [top + %d] <- 0x%08"
V8PRIxPTR " ; context\n",
top_address + output_offset, output_offset, value);
}
// A marker value is used in place of the function.
output_offset -= kPointerSize;
value = reinterpret_cast<intptr_t>(Smi::FromInt(StackFrame::CONSTRUCT));
output_frame->SetFrameSlot(output_offset, value);
if (trace_) {
PrintF(" 0x%08" V8PRIxPTR ": [top + %d] <- 0x%08"
V8PRIxPTR " ; function (construct sentinel)\n",
top_address + output_offset, output_offset, value);
}
// The output frame reflects a JSConstructStubGeneric frame.
output_offset -= kPointerSize;
value = reinterpret_cast<intptr_t>(construct_stub);
output_frame->SetFrameSlot(output_offset, value);
if (trace_) {
PrintF(" 0x%08" V8PRIxPTR ": [top + %d] <- 0x%08"
V8PRIxPTR " ; code object\n",
top_address + output_offset, output_offset, value);
}
// Number of incoming arguments.
output_offset -= kPointerSize;
value = reinterpret_cast<intptr_t>(Smi::FromInt(height - 1));
output_frame->SetFrameSlot(output_offset, value);
if (trace_) {
PrintF(" 0x%08" V8PRIxPTR ": [top + %d] <- 0x%08"
V8PRIxPTR " ; argc (%d)\n",
top_address + output_offset, output_offset, value, height - 1);
}
// Constructor function being invoked by the stub (only present on some
// architectures, indicated by kConstructorOffset).
if (ConstructFrameConstants::kConstructorOffset != kMinInt) {
output_offset -= kPointerSize;
value = reinterpret_cast<intptr_t>(function);
output_frame->SetFrameSlot(output_offset, value);
if (trace_) {
PrintF(" 0x%08" V8PRIxPTR ": [top + %d] <- 0x%08"
V8PRIxPTR " ; constructor function\n",
top_address + output_offset, output_offset, value);
}
}
// The newly allocated object was passed as receiver in the artificial
// constructor stub environment created by HEnvironment::CopyForInlining().
output_offset -= kPointerSize;
value = output_frame->GetFrameSlot(output_frame_size - kPointerSize);
output_frame->SetFrameSlot(output_offset, value);
if (trace_) {
PrintF(" 0x%08" V8PRIxPTR ": [top + %d] <- 0x%08"
V8PRIxPTR " ; allocated receiver\n",
top_address + output_offset, output_offset, value);
}
ASSERT(0 == output_offset);
intptr_t pc = reinterpret_cast<intptr_t>(
construct_stub->instruction_start() +
isolate_->heap()->construct_stub_deopt_pc_offset()->value());
output_frame->SetPc(pc);
}
void Deoptimizer::DoComputeAccessorStubFrame(TranslationIterator* iterator,
int frame_index,
bool is_setter_stub_frame) {

113
src/ia32/deoptimizer-ia32.cc
View File

@ -643,119 +643,6 @@ void Deoptimizer::DoComputeCompiledStubFrame(TranslationIterator* iterator,
}
void Deoptimizer::DoComputeConstructStubFrame(TranslationIterator* iterator,
int frame_index) {
Builtins* builtins = isolate_->builtins();
Code* construct_stub = builtins->builtin(Builtins::kJSConstructStubGeneric);
JSFunction* function = JSFunction::cast(ComputeLiteral(iterator->Next()));
unsigned height = iterator->Next();
unsigned height_in_bytes = height * kPointerSize;
if (trace_) {
PrintF(" translating construct stub => height=%d\n", height_in_bytes);
}
unsigned fixed_frame_size = 7 * kPointerSize;
unsigned output_frame_size = height_in_bytes + fixed_frame_size;
// Allocate and store the output frame description.
FrameDescription* output_frame =
new(output_frame_size) FrameDescription(output_frame_size, function);
output_frame->SetFrameType(StackFrame::CONSTRUCT);
// Construct stub can not be topmost or bottommost.
ASSERT(frame_index > 0 && frame_index < output_count_ - 1);
ASSERT(output_[frame_index] == NULL);
output_[frame_index] = output_frame;
// The top address of the frame is computed from the previous
// frame's top and this frame's size.
uint32_t top_address;
top_address = output_[frame_index - 1]->GetTop() - output_frame_size;
output_frame->SetTop(top_address);
// Compute the incoming parameter translation.
int parameter_count = height;
unsigned output_offset = output_frame_size;
for (int i = 0; i < parameter_count; ++i) {
output_offset -= kPointerSize;
DoTranslateCommand(iterator, frame_index, output_offset);
}
// Read caller's PC from the previous frame.
output_offset -= kPointerSize;
intptr_t callers_pc = output_[frame_index - 1]->GetPc();
output_frame->SetFrameSlot(output_offset, callers_pc);
if (trace_) {
PrintF(" 0x%08x: [top + %d] <- 0x%08x ; caller's pc\n",
top_address + output_offset, output_offset, callers_pc);
}
// Read caller's FP from the previous frame, and set this frame's FP.
output_offset -= kPointerSize;
intptr_t value = output_[frame_index - 1]->GetFp();
output_frame->SetFrameSlot(output_offset, value);
intptr_t fp_value = top_address + output_offset;
output_frame->SetFp(fp_value);
if (trace_) {
PrintF(" 0x%08x: [top + %d] <- 0x%08x ; caller's fp\n",
fp_value, output_offset, value);
}
// The context can be gotten from the previous frame.
output_offset -= kPointerSize;
value = output_[frame_index - 1]->GetContext();
output_frame->SetFrameSlot(output_offset, value);
if (trace_) {
PrintF(" 0x%08x: [top + %d] <- 0x%08x ; context\n",
top_address + output_offset, output_offset, value);
}
// A marker value is used in place of the function.
output_offset -= kPointerSize;
value = reinterpret_cast<intptr_t>(Smi::FromInt(StackFrame::CONSTRUCT));
output_frame->SetFrameSlot(output_offset, value);
if (trace_) {
PrintF(" 0x%08x: [top + %d] <- 0x%08x ; function (construct sentinel)\n",
top_address + output_offset, output_offset, value);
}
// The output frame reflects a JSConstructStubGeneric frame.
output_offset -= kPointerSize;
value = reinterpret_cast<intptr_t>(construct_stub);
output_frame->SetFrameSlot(output_offset, value);
if (trace_) {
PrintF(" 0x%08x: [top + %d] <- 0x%08x ; code object\n",
top_address + output_offset, output_offset, value);
}
// Number of incoming arguments.
output_offset -= kPointerSize;
value = reinterpret_cast<uint32_t>(Smi::FromInt(height - 1));
output_frame->SetFrameSlot(output_offset, value);
if (trace_) {
PrintF(" 0x%08x: [top + %d] <- 0x%08x ; argc (%d)\n",
top_address + output_offset, output_offset, value, height - 1);
}
// The newly allocated object was passed as receiver in the artificial
// constructor stub environment created by HEnvironment::CopyForInlining().
output_offset -= kPointerSize;
value = output_frame->GetFrameSlot(output_frame_size - kPointerSize);
output_frame->SetFrameSlot(output_offset, value);
if (trace_) {
PrintF(" 0x%08x: [top + %d] <- 0x%08x ; allocated receiver\n",
top_address + output_offset, output_offset, value);
}
ASSERT(0 == output_offset);
uint32_t pc = reinterpret_cast<uint32_t>(
construct_stub->instruction_start() +
isolate_->heap()->construct_stub_deopt_pc_offset()->value());
output_frame->SetPc(pc);
}
void Deoptimizer::DoComputeJSFrame(TranslationIterator* iterator,
int frame_index) {
BailoutId node_id = BailoutId(iterator->Next());

16
src/ia32/frames-ia32.h
View File

@ -114,14 +114,30 @@ class JavaScriptFrameConstants : public AllStatic {
class ArgumentsAdaptorFrameConstants : public AllStatic {
public:
// FP-relative.
static const int kLengthOffset = StandardFrameConstants::kExpressionsOffset;
static const int kFrameSize =
StandardFrameConstants::kFixedFrameSize + kPointerSize;
};
class ConstructFrameConstants : public AllStatic {
public:
// FP-relative.
static const int kImplicitReceiverOffset = -5 * kPointerSize;
static const int kConstructorOffset = kMinInt;
static const int kLengthOffset = -4 * kPointerSize;
static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset;
static const int kFrameSize =
StandardFrameConstants::kFixedFrameSize + 3 * kPointerSize;
};
class InternalFrameConstants : public AllStatic {
public:
// FP-relative.
static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset;
};

122
src/mips/deoptimizer-mips.cc
View File

@ -531,128 +531,6 @@ void Deoptimizer::DoComputeCompiledStubFrame(TranslationIterator* iterator,
}
void Deoptimizer::DoComputeConstructStubFrame(TranslationIterator* iterator,
int frame_index) {
Builtins* builtins = isolate_->builtins();
Code* construct_stub = builtins->builtin(Builtins::kJSConstructStubGeneric);
JSFunction* function = JSFunction::cast(ComputeLiteral(iterator->Next()));
unsigned height = iterator->Next();
unsigned height_in_bytes = height * kPointerSize;
if (FLAG_trace_deopt) {
PrintF(" translating construct stub => height=%d\n", height_in_bytes);
}
unsigned fixed_frame_size = 8 * kPointerSize;
unsigned output_frame_size = height_in_bytes + fixed_frame_size;
// Allocate and store the output frame description.
FrameDescription* output_frame =
new(output_frame_size) FrameDescription(output_frame_size, function);
output_frame->SetFrameType(StackFrame::CONSTRUCT);
// Construct stub can not be topmost or bottommost.
ASSERT(frame_index > 0 && frame_index < output_count_ - 1);
ASSERT(output_[frame_index] == NULL);
output_[frame_index] = output_frame;
// The top address of the frame is computed from the previous
// frame's top and this frame's size.
uint32_t top_address;
top_address = output_[frame_index - 1]->GetTop() - output_frame_size;
output_frame->SetTop(top_address);
// Compute the incoming parameter translation.
int parameter_count = height;
unsigned output_offset = output_frame_size;
for (int i = 0; i < parameter_count; ++i) {
output_offset -= kPointerSize;
DoTranslateCommand(iterator, frame_index, output_offset);
}
// Read caller's PC from the previous frame.
output_offset -= kPointerSize;
intptr_t callers_pc = output_[frame_index - 1]->GetPc();
output_frame->SetFrameSlot(output_offset, callers_pc);
if (FLAG_trace_deopt) {
PrintF(" 0x%08x: [top + %d] <- 0x%08x ; caller's pc\n",
top_address + output_offset, output_offset, callers_pc);
}
// Read caller's FP from the previous frame, and set this frame's FP.
output_offset -= kPointerSize;
intptr_t value = output_[frame_index - 1]->GetFp();
output_frame->SetFrameSlot(output_offset, value);
intptr_t fp_value = top_address + output_offset;
output_frame->SetFp(fp_value);
if (trace_) {
PrintF(" 0x%08x: [top + %d] <- 0x%08x ; caller's fp\n",
fp_value, output_offset, value);
}
// The context can be gotten from the previous frame.
output_offset -= kPointerSize;
value = output_[frame_index - 1]->GetContext();
output_frame->SetFrameSlot(output_offset, value);
if (trace_) {
PrintF(" 0x%08x: [top + %d] <- 0x%08x ; context\n",
top_address + output_offset, output_offset, value);
}
// A marker value is used in place of the function.
output_offset -= kPointerSize;
value = reinterpret_cast<intptr_t>(Smi::FromInt(StackFrame::CONSTRUCT));
output_frame->SetFrameSlot(output_offset, value);
if (trace_) {
PrintF(" 0x%08x: [top + %d] <- 0x%08x ; function (construct sentinel)\n",
top_address + output_offset, output_offset, value);
}
// The output frame reflects a JSConstructStubGeneric frame.
output_offset -= kPointerSize;
value = reinterpret_cast<intptr_t>(construct_stub);
output_frame->SetFrameSlot(output_offset, value);
if (trace_) {
PrintF(" 0x%08x: [top + %d] <- 0x%08x ; code object\n",
top_address + output_offset, output_offset, value);
}
// Number of incoming arguments.
output_offset -= kPointerSize;
value = reinterpret_cast<uint32_t>(Smi::FromInt(height - 1));
output_frame->SetFrameSlot(output_offset, value);
if (trace_) {
PrintF(" 0x%08x: [top + %d] <- 0x%08x ; argc (%d)\n",
top_address + output_offset, output_offset, value, height - 1);
}
// Constructor function being invoked by the stub.
output_offset -= kPointerSize;
value = reinterpret_cast<intptr_t>(function);
output_frame->SetFrameSlot(output_offset, value);
if (trace_) {
PrintF(" 0x%08x: [top + %d] <- 0x%08x ; constructor function\n",
top_address + output_offset, output_offset, value);
}
// The newly allocated object was passed as receiver in the artificial
// constructor stub environment created by HEnvironment::CopyForInlining().
output_offset -= kPointerSize;
value = output_frame->GetFrameSlot(output_frame_size - kPointerSize);
output_frame->SetFrameSlot(output_offset, value);
if (trace_) {
PrintF(" 0x%08x: [top + %d] <- 0x%08x ; allocated receiver\n",
top_address + output_offset, output_offset, value);
}
ASSERT(0 == output_offset);
uint32_t pc = reinterpret_cast<uint32_t>(
construct_stub->instruction_start() +
isolate_->heap()->construct_stub_deopt_pc_offset()->value());
output_frame->SetPc(pc);
}
// This code is very similar to ia32/arm code, but relies on register names
// (fp, sp) and how the frame is laid out.
void Deoptimizer::DoComputeJSFrame(TranslationIterator* iterator,

16
src/mips/frames-mips.h
View File

@ -208,14 +208,30 @@ class JavaScriptFrameConstants : public AllStatic {
class ArgumentsAdaptorFrameConstants : public AllStatic {
public:
// FP-relative.
static const int kLengthOffset = StandardFrameConstants::kExpressionsOffset;
static const int kFrameSize =
StandardFrameConstants::kFixedFrameSize + kPointerSize;
};
class ConstructFrameConstants : public AllStatic {
public:
// FP-relative.
static const int kImplicitReceiverOffset = -6 * kPointerSize;
static const int kConstructorOffset = -5 * kPointerSize;
static const int kLengthOffset = -4 * kPointerSize;
static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset;
static const int kFrameSize =
StandardFrameConstants::kFixedFrameSize + 4 * kPointerSize;
};
class InternalFrameConstants : public AllStatic {
public:
// FP-relative.
static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset;
};

120
src/x64/deoptimizer-x64.cc
View File

@ -535,126 +535,6 @@ void Deoptimizer::DoComputeCompiledStubFrame(TranslationIterator* iterator,
}
void Deoptimizer::DoComputeConstructStubFrame(TranslationIterator* iterator,
int frame_index) {
Builtins* builtins = isolate_->builtins();
Code* construct_stub = builtins->builtin(Builtins::kJSConstructStubGeneric);
JSFunction* function = JSFunction::cast(ComputeLiteral(iterator->Next()));
unsigned height = iterator->Next();
unsigned height_in_bytes = height * kPointerSize;
if (trace_) {
PrintF(" translating construct stub => height=%d\n", height_in_bytes);
}
unsigned fixed_frame_size = 7 * kPointerSize;
unsigned output_frame_size = height_in_bytes + fixed_frame_size;
// Allocate and store the output frame description.
FrameDescription* output_frame =
new(output_frame_size) FrameDescription(output_frame_size, function);
output_frame->SetFrameType(StackFrame::CONSTRUCT);
// Construct stub can not be topmost or bottommost.
ASSERT(frame_index > 0 && frame_index < output_count_ - 1);
ASSERT(output_[frame_index] == NULL);
output_[frame_index] = output_frame;
// The top address of the frame is computed from the previous
// frame's top and this frame's size.
intptr_t top_address;
top_address = output_[frame_index - 1]->GetTop() - output_frame_size;
output_frame->SetTop(top_address);
// Compute the incoming parameter translation.
int parameter_count = height;
unsigned output_offset = output_frame_size;
for (int i = 0; i < parameter_count; ++i) {
output_offset -= kPointerSize;
DoTranslateCommand(iterator, frame_index, output_offset);
}
// Read caller's PC from the previous frame.
output_offset -= kPointerSize;
intptr_t callers_pc = output_[frame_index - 1]->GetPc();
output_frame->SetFrameSlot(output_offset, callers_pc);
if (trace_) {
PrintF(" 0x%08" V8PRIxPTR ": [top + %d] <- 0x%08"
V8PRIxPTR " ; caller's pc\n",
top_address + output_offset, output_offset, callers_pc);
}
// Read caller's FP from the previous frame, and set this frame's FP.
output_offset -= kPointerSize;
intptr_t value = output_[frame_index - 1]->GetFp();
output_frame->SetFrameSlot(output_offset, value);
intptr_t fp_value = top_address + output_offset;
output_frame->SetFp(fp_value);
if (trace_) {
PrintF(" 0x%08" V8PRIxPTR ": [top + %d] <- 0x%08"
V8PRIxPTR " ; caller's fp\n",
fp_value, output_offset, value);
}
// The context can be gotten from the previous frame.
output_offset -= kPointerSize;
value = output_[frame_index - 1]->GetContext();
output_frame->SetFrameSlot(output_offset, value);
if (trace_) {
PrintF(" 0x%08" V8PRIxPTR ": [top + %d] <- 0x%08"
V8PRIxPTR " ; context\n",
top_address + output_offset, output_offset, value);
}
// A marker value is used in place of the function.
output_offset -= kPointerSize;
value = reinterpret_cast<intptr_t>(Smi::FromInt(StackFrame::CONSTRUCT));
output_frame->SetFrameSlot(output_offset, value);
if (trace_) {
PrintF(" 0x%08" V8PRIxPTR ": [top + %d] <- 0x%08"
V8PRIxPTR " ; function (construct sentinel)\n",
top_address + output_offset, output_offset, value);
}
// The output frame reflects a JSConstructStubGeneric frame.
output_offset -= kPointerSize;
value = reinterpret_cast<intptr_t>(construct_stub);
output_frame->SetFrameSlot(output_offset, value);
if (trace_) {
PrintF(" 0x%08" V8PRIxPTR ": [top + %d] <- 0x%08"
V8PRIxPTR " ; code object\n",
top_address + output_offset, output_offset, value);
}
// Number of incoming arguments.
output_offset -= kPointerSize;
value = reinterpret_cast<intptr_t>(Smi::FromInt(height - 1));
output_frame->SetFrameSlot(output_offset, value);
if (trace_) {
PrintF(" 0x%08" V8PRIxPTR ": [top + %d] <- 0x%08"
V8PRIxPTR " ; argc (%d)\n",
top_address + output_offset, output_offset, value, height - 1);
}
// The newly allocated object was passed as receiver in the artificial
// constructor stub environment created by HEnvironment::CopyForInlining().
output_offset -= kPointerSize;
value = output_frame->GetFrameSlot(output_frame_size - kPointerSize);
output_frame->SetFrameSlot(output_offset, value);
if (trace_) {
PrintF(" 0x%08" V8PRIxPTR ": [top + %d] <- 0x%08"
V8PRIxPTR " ; allocated receiver\n",
top_address + output_offset, output_offset, value);
}
ASSERT(0 == output_offset);
intptr_t pc = reinterpret_cast<intptr_t>(
construct_stub->instruction_start() +
isolate_->heap()->construct_stub_deopt_pc_offset()->value());
output_frame->SetPc(pc);
}
void Deoptimizer::DoComputeJSFrame(TranslationIterator* iterator,
int frame_index) {
BailoutId node_id = BailoutId(iterator->Next());

16
src/x64/frames-x64.h
View File

@ -100,14 +100,30 @@ class JavaScriptFrameConstants : public AllStatic {
class ArgumentsAdaptorFrameConstants : public AllStatic {
public:
// FP-relative.
static const int kLengthOffset = StandardFrameConstants::kExpressionsOffset;
static const int kFrameSize =
StandardFrameConstants::kFixedFrameSize + kPointerSize;
};
class ConstructFrameConstants : public AllStatic {
public:
// FP-relative.
static const int kImplicitReceiverOffset = -5 * kPointerSize;
static const int kConstructorOffset = kMinInt;
static const int kLengthOffset = -4 * kPointerSize;
static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset;
static const int kFrameSize =
StandardFrameConstants::kFixedFrameSize + 3 * kPointerSize;
};
class InternalFrameConstants : public AllStatic {
public:
// FP-relative.
static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset;
};