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
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
|
// Copyright 2012 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 <stdio.h>
#include "include/libplatform/libplatform.h"
#include "include/v8.h"
#include "src/frames.h"
#include "src/heap/heap.h"
#include "src/heap/spaces.h"
#include "src/isolate.h"
#include "src/objects-inl.h"
namespace v8 {
static const char* kHeader =
"# Copyright 2018 the V8 project authors. All rights reserved.\n"
"# Use of this source code is governed by a BSD-style license that can\n"
"# be found in the LICENSE file.\n"
"\n"
"# This file is automatically generated by mkgrokdump and should not\n"
"# be modified manually.\n"
"\n"
"# List of known V8 instance types.\n";
// Non-snapshot builds allocate objects to different places.
// Debug builds emit debug code, affecting code object sizes.
// Embedded builtins cause objects to be allocated in different locations.
#if defined(V8_EMBEDDED_BUILTINS) && defined(V8_USE_SNAPSHOT) && !defined(DEBUG)
static const char* kBuild = "shipping";
#else
static const char* kBuild = "non-shipping";
#endif
class MockArrayBufferAllocator : public v8::ArrayBuffer::Allocator {
public:
void* Allocate(size_t length) override { return nullptr; }
void* AllocateUninitialized(size_t length) override { return nullptr; }
void Free(void* p, size_t) override {}
};
#define RO_ROOT_LIST_CASE(type, name, camel_name) \
if (n == NULL && o == roots.name()) n = #camel_name;
#define ROOT_LIST_CASE(type, name, camel_name) \
if (n == NULL && o == space->heap()->name()) n = #camel_name;
#define STRUCT_LIST_CASE(upper_name, camel_name, name) \
if (n == NULL && o == roots.name##_map()) n = #camel_name "Map";
#define ALLOCATION_SITE_LIST_CASE(upper_name, camel_name, size, name) \
if (n == NULL && o == roots.name##_map()) n = #camel_name "Map";
static void DumpMaps(i::PagedSpace* space) {
i::HeapObjectIterator it(space);
i::ReadOnlyRoots roots(space->heap());
for (i::Object* o = it.Next(); o != NULL; o = it.Next()) {
if (!o->IsMap()) continue;
i::Map* m = i::Map::cast(o);
const char* n = NULL;
intptr_t p = reinterpret_cast<intptr_t>(m) & 0x7FFFF;
int t = m->instance_type();
STRONG_READ_ONLY_ROOT_LIST(RO_ROOT_LIST_CASE)
MUTABLE_ROOT_LIST(ROOT_LIST_CASE)
STRUCT_LIST(STRUCT_LIST_CASE)
ALLOCATION_SITE_LIST(ALLOCATION_SITE_LIST_CASE)
if (n == NULL) continue;
const char* sname = space->name();
i::PrintF(" (\"%s\", 0x%05" V8PRIxPTR "): (%d, \"%s\"),\n", sname, p, t,
n);
}
}
#undef ALLOCATION_SITE_LIST_CASE
#undef STRUCT_LIST_CASE
#undef ROOT_LIST_CASE
#undef RO_ROOT_LIST_CASE
static int DumpHeapConstants(const char* argv0) {
// Start up V8.
std::unique_ptr<v8::Platform> platform = v8::platform::NewDefaultPlatform();
v8::V8::InitializePlatform(platform.get());
v8::V8::Initialize();
v8::V8::InitializeExternalStartupData(argv0);
Isolate::CreateParams create_params;
MockArrayBufferAllocator mock_arraybuffer_allocator;
create_params.array_buffer_allocator = &mock_arraybuffer_allocator;
Isolate* isolate = Isolate::New(create_params);
{
Isolate::Scope scope(isolate);
i::Heap* heap = reinterpret_cast<i::Isolate*>(isolate)->heap();
i::ReadOnlyRoots roots(heap);
i::PrintF("%s", kHeader);
#define DUMP_TYPE(T) i::PrintF(" %d: \"%s\",\n", i::T, #T);
i::PrintF("INSTANCE_TYPES = {\n");
INSTANCE_TYPE_LIST(DUMP_TYPE)
i::PrintF("}\n");
#undef DUMP_TYPE
// Dump the KNOWN_MAP table to the console.
i::PrintF("\n# List of known V8 maps.\n");
i::PrintF("KNOWN_MAPS = {\n");
DumpMaps(heap->read_only_space());
DumpMaps(heap->map_space());
i::PrintF("}\n");
// Dump the KNOWN_OBJECTS table to the console.
i::PrintF("\n# List of known V8 objects.\n");
#define RO_ROOT_LIST_CASE(type, name, camel_name) \
if (n == NULL && o == roots.name()) { \
n = #camel_name; \
i = i::Heap::k##camel_name##RootIndex; \
}
#define ROOT_LIST_CASE(type, name, camel_name) \
if (n == NULL && o == heap->name()) { \
n = #camel_name; \
i = i::Heap::k##camel_name##RootIndex; \
}
i::PagedSpaces spit(heap, i::PagedSpaces::SpacesSpecifier::kAllPagedSpaces);
i::PrintF("KNOWN_OBJECTS = {\n");
for (i::PagedSpace* s = spit.next(); s != NULL; s = spit.next()) {
i::HeapObjectIterator it(s);
// Code objects are generally platform-dependent.
if (s->identity() == i::CODE_SPACE || s->identity() == i::MAP_SPACE)
continue;
const char* sname = s->name();
for (i::Object* o = it.Next(); o != NULL; o = it.Next()) {
// Skip maps in RO_SPACE since they will be reported elsewhere.
if (o->IsMap()) continue;
const char* n = NULL;
i::Heap::RootListIndex i = i::Heap::kStrongRootListLength;
intptr_t p = reinterpret_cast<intptr_t>(o) & 0x7FFFF;
STRONG_READ_ONLY_ROOT_LIST(RO_ROOT_LIST_CASE)
MUTABLE_ROOT_LIST(ROOT_LIST_CASE)
if (n == NULL) continue;
if (!i::Heap::RootIsImmortalImmovable(i)) continue;
i::PrintF(" (\"%s\", 0x%05" V8PRIxPTR "): \"%s\",\n", sname, p, n);
}
}
i::PrintF("}\n");
#undef ROOT_LIST_CASE
#undef RO_ROOT_LIST_CASE
// Dump frame markers
i::PrintF("\n# List of known V8 Frame Markers.\n");
#define DUMP_MARKER(T, class) i::PrintF(" \"%s\",\n", #T);
i::PrintF("FRAME_MARKERS = (\n");
STACK_FRAME_TYPE_LIST(DUMP_MARKER)
i::PrintF(")\n");
#undef DUMP_MARKER
}
i::PrintF("\n# This set of constants is generated from a %s build.\n",
kBuild);
// Teardown.
isolate->Dispose();
v8::V8::ShutdownPlatform();
return 0;
}
} // namespace v8
int main(int argc, char* argv[]) { return v8::DumpHeapConstants(argv[0]); }
|