1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
|
// Copyright 2020 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.
#ifndef V8_DEBUG_WASM_GDB_SERVER_WASM_MODULE_DEBUG_H_
#define V8_DEBUG_WASM_GDB_SERVER_WASM_MODULE_DEBUG_H_
#include "src/debug/debug-interface.h"
#include "src/debug/wasm/gdb-server/gdb-remote-util.h"
#include "src/execution/frames.h"
namespace v8 {
namespace internal {
namespace wasm {
class WasmValue;
namespace gdb_server {
// Represents the interface to access the Wasm engine state for a given module.
// For the moment it only works with interpreted functions, in the future it
// could be extended to also support Liftoff.
class WasmModuleDebug {
public:
WasmModuleDebug(v8::Isolate* isolate, Local<debug::WasmScript> script);
std::string GetModuleName() const;
i::Isolate* GetIsolate() const {
return reinterpret_cast<i::Isolate*>(isolate_);
}
// Gets the value of the {index}th global value.
static bool GetWasmGlobal(Isolate* isolate, uint32_t frame_index,
uint32_t index, uint8_t* buffer,
uint32_t buffer_size, uint32_t* size);
// Gets the value of the {index}th local value in the {frame_index}th stack
// frame.
static bool GetWasmLocal(Isolate* isolate, uint32_t frame_index,
uint32_t index, uint8_t* buffer,
uint32_t buffer_size, uint32_t* size);
// Gets the value of the {index}th value in the operand stack.
static bool GetWasmStackValue(Isolate* isolate, uint32_t frame_index,
uint32_t index, uint8_t* buffer,
uint32_t buffer_size, uint32_t* size);
// Reads {size} bytes, starting from {offset}, from the Memory instance
// associated to this module.
// Returns the number of byte copied to {buffer}, or 0 is case of error.
// Note: only one Memory for Module is currently supported.
uint32_t GetWasmMemory(Isolate* isolate, uint32_t offset, uint8_t* buffer,
uint32_t size);
// Reads {size} bytes, starting from {offset}, from the first segment
// associated to this module.
// Returns the number of byte copied to {buffer}, or 0 is case of error.
// Note: only one Memory for Module is currently supported.
uint32_t GetWasmData(Isolate* isolate, uint32_t offset, uint8_t* buffer,
uint32_t size);
// Gets {size} bytes, starting from {offset}, from the Code space of this
// module.
// Returns the number of byte copied to {buffer}, or 0 is case of error.
uint32_t GetWasmModuleBytes(wasm_addr_t wasm_addr, uint8_t* buffer,
uint32_t size);
// Inserts a breakpoint at the offset {offset} of this module.
// Returns {true} if the breakpoint was successfully added.
bool AddBreakpoint(uint32_t offset, int* breakpoint_id);
// Removes a breakpoint at the offset {offset} of the this module.
void RemoveBreakpoint(uint32_t offset, int breakpoint_id);
// Handle stepping in wasm functions via the wasm interpreter.
void PrepareStep();
// Returns the current stack trace as a vector of instruction pointers.
static std::vector<wasm_addr_t> GetCallStack(uint32_t debug_context_id,
Isolate* isolate);
private:
// Returns the module WasmInstance associated to the {frame_index}th frame
// in the call stack.
static Handle<WasmInstanceObject> GetWasmInstance(Isolate* isolate,
uint32_t frame_index);
// Returns its first WasmInstance for this Wasm module.
Handle<WasmInstanceObject> GetFirstWasmInstance();
// Iterates on current stack frames and return frame information for the
// {frame_index} specified.
// Returns an empty array if the frame specified does not correspond to a Wasm
// stack frame.
static std::vector<FrameSummary> FindWasmFrame(
StackTraceFrameIterator* frame_it, uint32_t* frame_index);
// Converts a WasmValue into an array of bytes.
static bool GetWasmValue(const wasm::WasmValue& wasm_value, uint8_t* buffer,
uint32_t buffer_size, uint32_t* size);
v8::Isolate* isolate_;
Global<debug::WasmScript> wasm_script_;
};
} // namespace gdb_server
} // namespace wasm
} // namespace internal
} // namespace v8
#endif // V8_DEBUG_WASM_GDB_SERVER_WASM_MODULE_DEBUG_H_
|
