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1 : // Copyright 2017 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 : #ifndef V8_OBJECTS_FRAME_ARRAY_H_
6 : #define V8_OBJECTS_FRAME_ARRAY_H_
7 :
8 : #include "src/objects.h"
9 : #include "src/wasm/wasm-objects.h"
10 :
11 : // Has to be the last include (doesn't have include guards):
12 : #include "src/objects/object-macros.h"
13 :
14 : namespace v8 {
15 : namespace internal {
16 :
17 : template <typename T>
18 : class Handle;
19 :
20 : #define FRAME_ARRAY_FIELD_LIST(V) \
21 : V(WasmInstance, WasmInstanceObject) \
22 : V(WasmFunctionIndex, Smi) \
23 : V(WasmCodeObject, Foreign) \
24 : V(Receiver, Object) \
25 : V(Function, JSFunction) \
26 : V(Code, AbstractCode) \
27 : V(Offset, Smi) \
28 : V(Flags, Smi)
29 :
30 : // Container object for data collected during simple stack trace captures.
31 : class FrameArray : public FixedArray {
32 : public:
33 : #define DECL_FRAME_ARRAY_ACCESSORS(name, type) \
34 : inline type name(int frame_ix) const; \
35 : inline void Set##name(int frame_ix, type value);
36 : FRAME_ARRAY_FIELD_LIST(DECL_FRAME_ARRAY_ACCESSORS)
37 : #undef DECL_FRAME_ARRAY_ACCESSORS
38 :
39 : inline bool IsWasmFrame(int frame_ix) const;
40 : inline bool IsWasmInterpretedFrame(int frame_ix) const;
41 : inline bool IsAsmJsWasmFrame(int frame_ix) const;
42 : inline int FrameCount() const;
43 :
44 : void ShrinkToFit(Isolate* isolate);
45 :
46 : // Flags.
47 : enum Flag {
48 : kIsWasmFrame = 1 << 0,
49 : kIsWasmInterpretedFrame = 1 << 1,
50 : kIsAsmJsWasmFrame = 1 << 2,
51 : kIsStrict = 1 << 3,
52 : kIsConstructor = 1 << 4,
53 : kAsmJsAtNumberConversion = 1 << 5,
54 : kIsAsync = 1 << 6,
55 : kIsPromiseAll = 1 << 7
56 : };
57 :
58 : static Handle<FrameArray> AppendJSFrame(Handle<FrameArray> in,
59 : Handle<Object> receiver,
60 : Handle<JSFunction> function,
61 : Handle<AbstractCode> code, int offset,
62 : int flags);
63 : static Handle<FrameArray> AppendWasmFrame(
64 : Handle<FrameArray> in, Handle<WasmInstanceObject> wasm_instance,
65 : int wasm_function_index, wasm::WasmCode* code, int offset, int flags);
66 :
67 : DECL_CAST(FrameArray)
68 :
69 : private:
70 : // The underlying fixed array embodies a captured stack trace. Frame i
71 : // occupies indices
72 : //
73 : // kFirstIndex + 1 + [i * kElementsPerFrame, (i + 1) * kElementsPerFrame[,
74 : //
75 : // with internal offsets as below:
76 :
77 : static const int kWasmInstanceOffset = 0;
78 : static const int kWasmFunctionIndexOffset = 1;
79 : static const int kWasmCodeObjectOffset = 2;
80 :
81 : static const int kReceiverOffset = 0;
82 : static const int kFunctionOffset = 1;
83 :
84 : static const int kCodeOffset = 2;
85 : static const int kOffsetOffset = 3;
86 :
87 : static const int kFlagsOffset = 4;
88 :
89 : static const int kElementsPerFrame = 5;
90 :
91 : // Array layout indices.
92 :
93 : static const int kFrameCountIndex = 0;
94 : static const int kFirstIndex = 1;
95 :
96 : static int LengthFor(int frame_count) {
97 7437528 : return kFirstIndex + frame_count * kElementsPerFrame;
98 : }
99 :
100 : static Handle<FrameArray> EnsureSpace(Isolate* isolate,
101 : Handle<FrameArray> array, int length);
102 :
103 : friend class Factory;
104 : OBJECT_CONSTRUCTORS(FrameArray, FixedArray);
105 : };
106 :
107 : } // namespace internal
108 : } // namespace v8
109 :
110 : #include "src/objects/object-macros-undef.h"
111 :
112 : #endif // V8_OBJECTS_FRAME_ARRAY_H_
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