Merge V8 at r7668: Initial merge by Git.
Change-Id: I1703c8b4f5c63052451a22cf3fb878abc9a0ec75
diff --git a/src/accessors.cc b/src/accessors.cc
index e33b4d7..5f9bf74 100644
--- a/src/accessors.cc
+++ b/src/accessors.cc
@@ -568,172 +568,6 @@
// Accessors::FunctionArguments
//
-static Address SlotAddress(JavaScriptFrame* frame, int slot_index) {
- if (slot_index >= 0) {
- const int offset = JavaScriptFrameConstants::kLocal0Offset;
- return frame->fp() + offset - (slot_index * kPointerSize);
- } else {
- const int offset = JavaScriptFrameConstants::kReceiverOffset;
- return frame->caller_sp() + offset + (slot_index * kPointerSize);
- }
-}
-
-
-// We can't intermix stack decoding and allocations because
-// deoptimization infrastracture is not GC safe.
-// Thus we build a temporary structure in malloced space.
-class SlotRef BASE_EMBEDDED {
- public:
- enum SlotRepresentation {
- UNKNOWN,
- TAGGED,
- INT32,
- DOUBLE,
- LITERAL
- };
-
- SlotRef()
- : addr_(NULL), representation_(UNKNOWN) { }
-
- SlotRef(Address addr, SlotRepresentation representation)
- : addr_(addr), representation_(representation) { }
-
- explicit SlotRef(Object* literal)
- : literal_(literal), representation_(LITERAL) { }
-
- Handle<Object> GetValue() {
- switch (representation_) {
- case TAGGED:
- return Handle<Object>(Memory::Object_at(addr_));
-
- case INT32: {
- int value = Memory::int32_at(addr_);
- if (Smi::IsValid(value)) {
- return Handle<Object>(Smi::FromInt(value));
- } else {
- return Isolate::Current()->factory()->NewNumberFromInt(value);
- }
- }
-
- case DOUBLE: {
- double value = Memory::double_at(addr_);
- return Isolate::Current()->factory()->NewNumber(value);
- }
-
- case LITERAL:
- return literal_;
-
- default:
- UNREACHABLE();
- return Handle<Object>::null();
- }
- }
-
- private:
- Address addr_;
- Handle<Object> literal_;
- SlotRepresentation representation_;
-};
-
-
-static SlotRef ComputeSlotForNextArgument(TranslationIterator* iterator,
- DeoptimizationInputData* data,
- JavaScriptFrame* frame) {
- Translation::Opcode opcode =
- static_cast<Translation::Opcode>(iterator->Next());
-
- switch (opcode) {
- case Translation::BEGIN:
- case Translation::FRAME:
- // Peeled off before getting here.
- break;
-
- case Translation::ARGUMENTS_OBJECT:
- // This can be only emitted for local slots not for argument slots.
- break;
-
- case Translation::REGISTER:
- case Translation::INT32_REGISTER:
- case Translation::DOUBLE_REGISTER:
- case Translation::DUPLICATE:
- // We are at safepoint which corresponds to call. All registers are
- // saved by caller so there would be no live registers at this
- // point. Thus these translation commands should not be used.
- break;
-
- case Translation::STACK_SLOT: {
- int slot_index = iterator->Next();
- Address slot_addr = SlotAddress(frame, slot_index);
- return SlotRef(slot_addr, SlotRef::TAGGED);
- }
-
- case Translation::INT32_STACK_SLOT: {
- int slot_index = iterator->Next();
- Address slot_addr = SlotAddress(frame, slot_index);
- return SlotRef(slot_addr, SlotRef::INT32);
- }
-
- case Translation::DOUBLE_STACK_SLOT: {
- int slot_index = iterator->Next();
- Address slot_addr = SlotAddress(frame, slot_index);
- return SlotRef(slot_addr, SlotRef::DOUBLE);
- }
-
- case Translation::LITERAL: {
- int literal_index = iterator->Next();
- return SlotRef(data->LiteralArray()->get(literal_index));
- }
- }
-
- UNREACHABLE();
- return SlotRef();
-}
-
-
-
-
-
-static void ComputeSlotMappingForArguments(JavaScriptFrame* frame,
- int inlined_frame_index,
- Vector<SlotRef>* args_slots) {
- AssertNoAllocation no_gc;
- int deopt_index = AstNode::kNoNumber;
- DeoptimizationInputData* data =
- static_cast<OptimizedFrame*>(frame)->GetDeoptimizationData(&deopt_index);
- TranslationIterator it(data->TranslationByteArray(),
- data->TranslationIndex(deopt_index)->value());
- Translation::Opcode opcode = static_cast<Translation::Opcode>(it.Next());
- ASSERT(opcode == Translation::BEGIN);
- int frame_count = it.Next();
- USE(frame_count);
- ASSERT(frame_count > inlined_frame_index);
- int frames_to_skip = inlined_frame_index;
- while (true) {
- opcode = static_cast<Translation::Opcode>(it.Next());
- // Skip over operands to advance to the next opcode.
- it.Skip(Translation::NumberOfOperandsFor(opcode));
- if (opcode == Translation::FRAME) {
- if (frames_to_skip == 0) {
- // We reached the frame corresponding to the inlined function
- // in question. Process the translation commands for the
- // arguments.
- //
- // Skip the translation command for the receiver.
- it.Skip(Translation::NumberOfOperandsFor(
- static_cast<Translation::Opcode>(it.Next())));
- // Compute slots for arguments.
- for (int i = 0; i < args_slots->length(); ++i) {
- (*args_slots)[i] = ComputeSlotForNextArgument(&it, data, frame);
- }
- return;
- }
- frames_to_skip--;
- }
- }
-
- UNREACHABLE();
-}
-
static MaybeObject* ConstructArgumentsObjectForInlinedFunction(
JavaScriptFrame* frame,
@@ -742,7 +576,9 @@
Factory* factory = Isolate::Current()->factory();
int args_count = inlined_function->shared()->formal_parameter_count();
ScopedVector<SlotRef> args_slots(args_count);
- ComputeSlotMappingForArguments(frame, inlined_frame_index, &args_slots);
+ SlotRef::ComputeSlotMappingForArguments(frame,
+ inlined_frame_index,
+ &args_slots);
Handle<JSObject> arguments =
factory->NewArgumentsObject(inlined_function, args_count);
Handle<FixedArray> array = factory->NewFixedArray(args_count);
@@ -767,7 +603,7 @@
// Find the top invocation of the function by traversing frames.
List<JSFunction*> functions(2);
- for (JavaScriptFrameIterator it; !it.done(); it.Advance()) {
+ for (JavaScriptFrameIterator it(isolate); !it.done(); it.Advance()) {
JavaScriptFrame* frame = it.frame();
frame->GetFunctions(&functions);
for (int i = functions.length() - 1; i >= 0; i--) {
@@ -856,7 +692,7 @@
Handle<JSFunction> function(holder, isolate);
List<JSFunction*> functions(2);
- for (JavaScriptFrameIterator it; !it.done(); it.Advance()) {
+ for (JavaScriptFrameIterator it(isolate); !it.done(); it.Advance()) {
JavaScriptFrame* frame = it.frame();
frame->GetFunctions(&functions);
for (int i = functions.length() - 1; i >= 0; i--) {