Line data Source code
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 261784 : FrameInspector::FrameInspector(StandardFrame* frame, int inlined_frame_index,
16 : Isolate* isolate)
17 : : frame_(frame),
18 : inlined_frame_index_(inlined_frame_index),
19 785352 : isolate_(isolate) {
20 : // Extract the relevant information from the frame summary and discard it.
21 523568 : FrameSummary summary = FrameSummary::Get(frame, inlined_frame_index);
22 :
23 261784 : is_constructor_ = summary.is_constructor();
24 261784 : source_position_ = summary.SourcePosition();
25 261784 : function_name_ = summary.FunctionName();
26 261784 : script_ = Handle<Script>::cast(summary.script());
27 261784 : receiver_ = summary.receiver();
28 :
29 261784 : if (summary.IsJavaScript()) {
30 260952 : function_ = summary.AsJavaScript().function();
31 : }
32 :
33 : JavaScriptFrame* js_frame =
34 261784 : frame->is_java_script() ? javascript_frame() : nullptr;
35 : DCHECK(js_frame || frame->is_wasm());
36 522736 : has_adapted_arguments_ = js_frame && js_frame->has_adapted_arguments();
37 523568 : is_optimized_ = frame_->is_optimized();
38 523568 : is_interpreted_ = frame_->is_interpreted();
39 :
40 : // Calculate the deoptimized frame.
41 261784 : if (is_optimized_) {
42 : DCHECK_NOT_NULL(js_frame);
43 24974 : deoptimized_frame_.reset(Deoptimizer::DebuggerInspectableFrame(
44 24974 : js_frame, inlined_frame_index, isolate));
45 473620 : } else if (frame_->is_wasm_interpreter_entry()) {
46 : wasm_interpreted_frame_ =
47 : WasmInterpreterEntryFrame::cast(frame_)
48 1488 : ->debug_info()
49 2232 : ->GetInterpretedFrame(frame_->fp(), inlined_frame_index);
50 : DCHECK(wasm_interpreted_frame_);
51 : }
52 261784 : }
53 :
54 : // NOLINTNEXTLINE
55 523568 : FrameInspector::~FrameInspector() {
56 : // Destructor needs to be defined in the .cc file, because it instantiates
57 : // std::unique_ptr destructors but the types are not known in the header.
58 261784 : }
59 :
60 0 : int FrameInspector::GetParametersCount() {
61 0 : if (is_optimized_) return deoptimized_frame_->parameters_count();
62 0 : if (wasm_interpreted_frame_)
63 0 : return wasm_interpreted_frame_->GetParameterCount();
64 0 : return frame_->ComputeParametersCount();
65 : }
66 :
67 25375 : Handle<Object> FrameInspector::GetParameter(int index) {
68 25375 : if (is_optimized_) return deoptimized_frame_->GetParameter(index);
69 : // TODO(clemensh): Handle wasm_interpreted_frame_.
70 13115 : return handle(frame_->GetParameter(index), isolate_);
71 : }
72 :
73 3996622 : Handle<Object> FrameInspector::GetExpression(int index) {
74 3996622 : return is_optimized_ ? deoptimized_frame_->GetExpression(index)
75 11980563 : : handle(frame_->GetExpression(index), isolate_);
76 : }
77 :
78 476981 : Handle<Object> FrameInspector::GetContext() {
79 : return deoptimized_frame_ ? deoptimized_frame_->GetContext()
80 953962 : : handle(frame_->context(), isolate_);
81 : }
82 :
83 383166 : bool FrameInspector::IsWasm() { return frame_->is_wasm(); }
84 :
85 294159 : bool FrameInspector::IsJavaScript() { return frame_->is_java_script(); }
86 :
87 0 : bool FrameInspector::ParameterIsShadowedByContextLocal(
88 : Handle<ScopeInfo> info, Handle<String> parameter_name) {
89 : VariableMode mode;
90 : InitializationFlag init_flag;
91 : MaybeAssignedFlag maybe_assigned_flag;
92 0 : return ScopeInfo::ContextSlotIndex(*info, *parameter_name, &mode, &init_flag,
93 0 : &maybe_assigned_flag) != -1;
94 : }
95 : } // namespace internal
96 120216 : } // namespace v8
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