1 // Copyright 2015 the V8 project authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "src/debug/debug-frames.h" 6 7 #include "src/accessors.h" 8 #include "src/frames-inl.h" 9 #include "src/wasm/wasm-interpreter.h" 10 #include "src/wasm/wasm-objects-inl.h" 11 12 namespace v8 { 13 namespace internal { 14 15 FrameInspector::FrameInspector(StandardFrame* frame, int inlined_frame_index, 16 Isolate* isolate) 17 : frame_(frame), 18 inlined_frame_index_(inlined_frame_index), 19 isolate_(isolate) { 20 // Extract the relevant information from the frame summary and discard it. 21 FrameSummary summary = FrameSummary::Get(frame, inlined_frame_index); 22 23 is_constructor_ = summary.is_constructor(); 24 source_position_ = summary.SourcePosition(); 25 function_name_ = summary.FunctionName(); 26 script_ = Handle<Script>::cast(summary.script()); 27 receiver_ = summary.receiver(); 28 29 if (summary.IsJavaScript()) { 30 function_ = summary.AsJavaScript().function(); 31 } 32 33 JavaScriptFrame* js_frame = 34 frame->is_java_script() ? javascript_frame() : nullptr; 35 DCHECK(js_frame || frame->is_wasm()); 36 has_adapted_arguments_ = js_frame && js_frame->has_adapted_arguments(); 37 is_optimized_ = frame_->is_optimized(); 38 is_interpreted_ = frame_->is_interpreted(); 39 40 // Calculate the deoptimized frame. 41 if (is_optimized_) { 42 DCHECK_NOT_NULL(js_frame); 43 deoptimized_frame_.reset(Deoptimizer::DebuggerInspectableFrame( 44 js_frame, inlined_frame_index, isolate)); 45 } else if (frame_->is_wasm_interpreter_entry()) { 46 wasm_interpreted_frame_ = 47 WasmInterpreterEntryFrame::cast(frame_) 48 ->debug_info() 49 ->GetInterpretedFrame(frame_->fp(), inlined_frame_index); 50 DCHECK(wasm_interpreted_frame_); 51 } 52 } 53 54 FrameInspector::~FrameInspector() { 55 // Destructor needs to be defined in the .cc file, because it instantiates 56 // std::unique_ptr destructors but the types are not known in the header. 57 } 58 59 int FrameInspector::GetParametersCount() { 60 if (is_optimized_) return deoptimized_frame_->parameters_count(); 61 if (wasm_interpreted_frame_) 62 return wasm_interpreted_frame_->GetParameterCount(); 63 return frame_->ComputeParametersCount(); 64 } 65 66 Handle<Object> FrameInspector::GetParameter(int index) { 67 if (is_optimized_) return deoptimized_frame_->GetParameter(index); 68 // TODO(clemensh): Handle wasm_interpreted_frame_. 69 return handle(frame_->GetParameter(index), isolate_); 70 } 71 72 Handle<Object> FrameInspector::GetExpression(int index) { 73 return is_optimized_ ? deoptimized_frame_->GetExpression(index) 74 : handle(frame_->GetExpression(index), isolate_); 75 } 76 77 Handle<Object> FrameInspector::GetContext() { 78 return deoptimized_frame_ ? deoptimized_frame_->GetContext() 79 : handle(frame_->context(), isolate_); 80 } 81 82 bool FrameInspector::IsWasm() { return frame_->is_wasm(); } 83 84 bool FrameInspector::IsJavaScript() { return frame_->is_java_script(); } 85 86 bool FrameInspector::ParameterIsShadowedByContextLocal( 87 Handle<ScopeInfo> info, Handle<String> parameter_name) { 88 VariableMode mode; 89 InitializationFlag init_flag; 90 MaybeAssignedFlag maybe_assigned_flag; 91 return ScopeInfo::ContextSlotIndex(info, parameter_name, &mode, &init_flag, 92 &maybe_assigned_flag) != -1; 93 } 94 } // namespace internal 95 } // namespace v8 96
