// Copyright 2015 the V8 project authors. All rights reserved. // Use of this source code is governed by a BSD-style license that can be // found in the LICENSE file. #include "src/debug/debug-frames.h" #include "src/accessors.h" #include "src/frames-inl.h" #include "src/wasm/wasm-interpreter.h" #include "src/wasm/wasm-objects-inl.h" namespace v8 { namespace internal { FrameInspector::FrameInspector(StandardFrame* frame, int inlined_frame_index, Isolate* isolate) : frame_(frame), inlined_frame_index_(inlined_frame_index), isolate_(isolate) { // Extract the relevant information from the frame summary and discard it. FrameSummary summary = FrameSummary::Get(frame, inlined_frame_index); is_constructor_ = summary.is_constructor(); source_position_ = summary.SourcePosition(); function_name_ = summary.FunctionName(); script_ = Handle<Script>::cast(summary.script()); receiver_ = summary.receiver(); if (summary.IsJavaScript()) { function_ = summary.AsJavaScript().function(); } JavaScriptFrame* js_frame = frame->is_java_script() ? javascript_frame() : nullptr; DCHECK(js_frame || frame->is_wasm()); has_adapted_arguments_ = js_frame && js_frame->has_adapted_arguments(); is_optimized_ = frame_->is_optimized(); is_interpreted_ = frame_->is_interpreted(); // Calculate the deoptimized frame. if (is_optimized_) { DCHECK_NOT_NULL(js_frame); deoptimized_frame_.reset(Deoptimizer::DebuggerInspectableFrame( js_frame, inlined_frame_index, isolate)); } else if (frame_->is_wasm_interpreter_entry()) { wasm_interpreted_frame_ = WasmInterpreterEntryFrame::cast(frame_) ->debug_info() ->GetInterpretedFrame(frame_->fp(), inlined_frame_index); DCHECK(wasm_interpreted_frame_); } } // NOLINTNEXTLINE FrameInspector::~FrameInspector() { // Destructor needs to be defined in the .cc file, because it instantiates // std::unique_ptr destructors but the types are not known in the header. } int FrameInspector::GetParametersCount() { if (is_optimized_) return deoptimized_frame_->parameters_count(); if (wasm_interpreted_frame_) return wasm_interpreted_frame_->GetParameterCount(); return frame_->ComputeParametersCount(); } Handle<Object> FrameInspector::GetParameter(int index) { if (is_optimized_) return deoptimized_frame_->GetParameter(index); // TODO(clemensh): Handle wasm_interpreted_frame_. return handle(frame_->GetParameter(index), isolate_); } Handle<Object> FrameInspector::GetExpression(int index) { return is_optimized_ ? deoptimized_frame_->GetExpression(index) : handle(frame_->GetExpression(index), isolate_); } Handle<Object> FrameInspector::GetContext() { return deoptimized_frame_ ? deoptimized_frame_->GetContext() : handle(frame_->context(), isolate_); } bool FrameInspector::IsWasm() { return frame_->is_wasm(); } bool FrameInspector::IsJavaScript() { return frame_->is_java_script(); } bool FrameInspector::ParameterIsShadowedByContextLocal( Handle<ScopeInfo> info, Handle<String> parameter_name) { VariableMode mode; InitializationFlag init_flag; MaybeAssignedFlag maybe_assigned_flag; return ScopeInfo::ContextSlotIndex(*info, *parameter_name, &mode, &init_flag, &maybe_assigned_flag) != -1; } } // namespace internal } // namespace v8