diff options
Diffstat (limited to 'deps/v8/src/arm/deoptimizer-arm.cc')
-rw-r--r-- | deps/v8/src/arm/deoptimizer-arm.cc | 125 |
1 files changed, 111 insertions, 14 deletions
diff --git a/deps/v8/src/arm/deoptimizer-arm.cc b/deps/v8/src/arm/deoptimizer-arm.cc index 3689a9f6b6b..76d89541c59 100644 --- a/deps/v8/src/arm/deoptimizer-arm.cc +++ b/deps/v8/src/arm/deoptimizer-arm.cc @@ -1,4 +1,4 @@ -// Copyright 2011 the V8 project authors. All rights reserved. +// Copyright 2012 the V8 project authors. All rights reserved. // Redistribution and use in source and binary forms, with or without // modification, are permitted provided that the following conditions are // met: @@ -211,12 +211,13 @@ void Deoptimizer::DoComputeOsrOutputFrame() { ASSERT(Translation::BEGIN == opcode); USE(opcode); int count = iterator.Next(); + iterator.Skip(1); // Drop JS frame count. ASSERT(count == 1); USE(count); opcode = static_cast<Translation::Opcode>(iterator.Next()); USE(opcode); - ASSERT(Translation::FRAME == opcode); + ASSERT(Translation::JS_FRAME == opcode); unsigned node_id = iterator.Next(); USE(node_id); ASSERT(node_id == ast_id); @@ -252,9 +253,7 @@ void Deoptimizer::DoComputeOsrOutputFrame() { output_ = new FrameDescription*[1]; output_[0] = new(output_frame_size) FrameDescription( output_frame_size, function_); -#ifdef DEBUG - output_[0]->SetKind(Code::OPTIMIZED_FUNCTION); -#endif + output_[0]->SetFrameType(StackFrame::JAVA_SCRIPT); // Clear the incoming parameters in the optimized frame to avoid // confusing the garbage collector. @@ -342,15 +341,115 @@ void Deoptimizer::DoComputeOsrOutputFrame() { } +void Deoptimizer::DoComputeArgumentsAdaptorFrame(TranslationIterator* iterator, + int frame_index) { + JSFunction* function = JSFunction::cast(ComputeLiteral(iterator->Next())); + unsigned height = iterator->Next(); + unsigned height_in_bytes = height * kPointerSize; + if (FLAG_trace_deopt) { + PrintF(" translating arguments adaptor => height=%d\n", height_in_bytes); + } + + unsigned fixed_frame_size = ArgumentsAdaptorFrameConstants::kFrameSize; + unsigned input_frame_size = input_->GetFrameSize(); + 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::ARGUMENTS_ADAPTOR); + + // Arguments adaptor 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; + unsigned input_offset = input_frame_size; + for (int i = 0; i < parameter_count; ++i) { + output_offset -= kPointerSize; + DoTranslateCommand(iterator, frame_index, output_offset); + } + input_offset -= (parameter_count * kPointerSize); + + // Read caller's PC from the previous frame. + output_offset -= kPointerSize; + input_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; + input_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 (FLAG_trace_deopt) { + PrintF(" 0x%08x: [top + %d] <- 0x%08x ; caller's fp\n", + fp_value, output_offset, value); + } + + // A marker value is used in place of the context. + output_offset -= kPointerSize; + input_offset -= kPointerSize; + intptr_t context = reinterpret_cast<intptr_t>( + Smi::FromInt(StackFrame::ARGUMENTS_ADAPTOR)); + output_frame->SetFrameSlot(output_offset, context); + if (FLAG_trace_deopt) { + PrintF(" 0x%08x: [top + %d] <- 0x%08x ; context (adaptor sentinel)\n", + top_address + output_offset, output_offset, context); + } + + // The function was mentioned explicitly in the ARGUMENTS_ADAPTOR_FRAME. + output_offset -= kPointerSize; + input_offset -= kPointerSize; + value = reinterpret_cast<intptr_t>(function); + output_frame->SetFrameSlot(output_offset, value); + if (FLAG_trace_deopt) { + PrintF(" 0x%08x: [top + %d] <- 0x%08x ; function\n", + top_address + output_offset, output_offset, value); + } + + // Number of incoming arguments. + output_offset -= kPointerSize; + input_offset -= kPointerSize; + value = reinterpret_cast<uint32_t>(Smi::FromInt(height - 1)); + output_frame->SetFrameSlot(output_offset, value); + if (FLAG_trace_deopt) { + PrintF(" 0x%08x: [top + %d] <- 0x%08x ; argc (%d)\n", + top_address + output_offset, output_offset, value, height - 1); + } + + ASSERT(0 == output_offset); + + Builtins* builtins = isolate_->builtins(); + Code* adaptor_trampoline = + builtins->builtin(Builtins::kArgumentsAdaptorTrampoline); + uint32_t pc = reinterpret_cast<uint32_t>( + adaptor_trampoline->instruction_start() + + isolate_->heap()->arguments_adaptor_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::DoComputeFrame(TranslationIterator* iterator, - int frame_index) { +void Deoptimizer::DoComputeJSFrame(TranslationIterator* iterator, + int frame_index) { // Read the ast node id, function, and frame height for this output frame. - Translation::Opcode opcode = - static_cast<Translation::Opcode>(iterator->Next()); - USE(opcode); - ASSERT(Translation::FRAME == opcode); int node_id = iterator->Next(); JSFunction* function = JSFunction::cast(ComputeLiteral(iterator->Next())); unsigned height = iterator->Next(); @@ -370,9 +469,7 @@ void Deoptimizer::DoComputeFrame(TranslationIterator* iterator, // Allocate and store the output frame description. FrameDescription* output_frame = new(output_frame_size) FrameDescription(output_frame_size, function); -#ifdef DEBUG - output_frame->SetKind(Code::FUNCTION); -#endif + output_frame->SetFrameType(StackFrame::JAVA_SCRIPT); bool is_bottommost = (0 == frame_index); bool is_topmost = (output_count_ - 1 == frame_index); |