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
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
|
// 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/execution/frames.h"
#include "src/execution/isolate.h"
#include "src/heap/heap-inl.h"
#include "src/heap/read-only-heap.h"
#include "src/heap/spaces.h"
#include "src/objects/objects-inl.h"
namespace v8 {
static const char* kHeader =
"# Copyright 2019 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";
// 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(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 {}
};
static void DumpKnownMap(FILE* out, i::Heap* heap, const char* space_name,
i::HeapObject object) {
#define RO_ROOT_LIST_CASE(type, name, CamelName) \
if (root_name == nullptr && object == roots.name()) root_name = #CamelName;
#define MUTABLE_ROOT_LIST_CASE(type, name, CamelName) \
if (root_name == nullptr && object == heap->name()) root_name = #CamelName;
i::ReadOnlyRoots roots(heap);
const char* root_name = nullptr;
i::Map map = i::Map::cast(object);
intptr_t root_ptr =
static_cast<intptr_t>(map.ptr()) & (i::Page::kPageSize - 1);
READ_ONLY_ROOT_LIST(RO_ROOT_LIST_CASE)
MUTABLE_ROOT_LIST(MUTABLE_ROOT_LIST_CASE)
if (root_name == nullptr) return;
i::PrintF(out, " (\"%s\", 0x%05" V8PRIxPTR "): (%d, \"%s\"),\n", space_name,
root_ptr, map.instance_type(), root_name);
#undef MUTABLE_ROOT_LIST_CASE
#undef RO_ROOT_LIST_CASE
}
static void DumpKnownObject(FILE* out, i::Heap* heap, const char* space_name,
i::HeapObject object) {
#define RO_ROOT_LIST_CASE(type, name, CamelName) \
if (root_name == nullptr && object == roots.name()) { \
root_name = #CamelName; \
root_index = i::RootIndex::k##CamelName; \
}
#define ROOT_LIST_CASE(type, name, CamelName) \
if (root_name == nullptr && object == heap->name()) { \
root_name = #CamelName; \
root_index = i::RootIndex::k##CamelName; \
}
i::ReadOnlyRoots roots(heap);
const char* root_name = nullptr;
i::RootIndex root_index = i::RootIndex::kFirstSmiRoot;
intptr_t root_ptr = object.ptr() & (i::Page::kPageSize - 1);
STRONG_READ_ONLY_ROOT_LIST(RO_ROOT_LIST_CASE)
MUTABLE_ROOT_LIST(ROOT_LIST_CASE)
if (root_name == nullptr) return;
if (!i::RootsTable::IsImmortalImmovable(root_index)) return;
i::PrintF(out, " (\"%s\", 0x%05" V8PRIxPTR "): \"%s\",\n", space_name,
root_ptr, root_name);
#undef ROOT_LIST_CASE
#undef RO_ROOT_LIST_CASE
}
static void DumpSpaceFirstPageAddress(FILE* out, i::PagedSpace* space) {
const char* name = space->name();
i::Address first_page = reinterpret_cast<i::Address>(space->first_page());
i::Tagged_t compressed = i::CompressTagged(first_page);
uintptr_t unsigned_compressed = static_cast<uint32_t>(compressed);
i::PrintF(out, " 0x%08" V8PRIxPTR ": \"%s\",\n", unsigned_compressed, name);
}
static int DumpHeapConstants(FILE* out, 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::ReadOnlyHeap* read_only_heap =
reinterpret_cast<i::Isolate*>(isolate)->read_only_heap();
i::PrintF(out, "%s", kHeader);
#define DUMP_TYPE(T) i::PrintF(out, " %d: \"%s\",\n", i::T, #T);
i::PrintF(out, "INSTANCE_TYPES = {\n");
INSTANCE_TYPE_LIST(DUMP_TYPE)
i::PrintF(out, "}\n");
#undef DUMP_TYPE
{
// Dump the KNOWN_MAP table to the console.
i::PrintF(out, "\n# List of known V8 maps.\n");
i::PrintF(out, "KNOWN_MAPS = {\n");
i::ReadOnlyHeapObjectIterator ro_iterator(read_only_heap);
for (i::HeapObject object = ro_iterator.Next(); !object.is_null();
object = ro_iterator.Next()) {
if (!object.IsMap()) continue;
DumpKnownMap(out, heap, i::Heap::GetSpaceName(i::RO_SPACE), object);
}
i::PagedSpaceObjectIterator iterator(heap->map_space());
for (i::HeapObject object = iterator.Next(); !object.is_null();
object = iterator.Next()) {
if (!object.IsMap()) continue;
DumpKnownMap(out, heap, i::Heap::GetSpaceName(i::MAP_SPACE), object);
}
i::PrintF(out, "}\n");
}
{
// Dump the KNOWN_OBJECTS table to the console.
i::PrintF(out, "\n# List of known V8 objects.\n");
i::PrintF(out, "KNOWN_OBJECTS = {\n");
i::ReadOnlyHeapObjectIterator ro_iterator(read_only_heap);
for (i::HeapObject object = ro_iterator.Next(); !object.is_null();
object = ro_iterator.Next()) {
// Skip read-only heap maps, they will be reported elsewhere.
if (object.IsMap()) continue;
DumpKnownObject(out, heap, i::Heap::GetSpaceName(i::RO_SPACE), object);
}
i::PagedSpaceIterator spit(heap);
for (i::PagedSpace* s = spit.Next(); s != nullptr; s = spit.Next()) {
i::PagedSpaceObjectIterator 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::HeapObject o = it.Next(); !o.is_null(); o = it.Next()) {
DumpKnownObject(out, heap, sname, o);
}
}
i::PrintF(out, "}\n");
}
if (COMPRESS_POINTERS_BOOL) {
// Dump a list of addresses for the first page of each space that contains
// objects in the other tables above. This is only useful if two
// assumptions hold:
// 1. Those pages are positioned deterministically within the heap
// reservation block during snapshot deserialization.
// 2. Those pages cannot ever be moved (such as by compaction).
i::PrintF(out,
"\n# Lower 32 bits of first page addresses for various heap "
"spaces.\n");
i::PrintF(out, "HEAP_FIRST_PAGES = {\n");
i::PagedSpaceIterator it(heap);
for (i::PagedSpace* s = it.Next(); s != nullptr; s = it.Next()) {
// Code page is different on Windows vs Linux (bug v8:9844), so skip it.
if (s->identity() == i::CODE_SPACE) {
continue;
}
DumpSpaceFirstPageAddress(out, s);
}
DumpSpaceFirstPageAddress(out, read_only_heap->read_only_space());
i::PrintF(out, "}\n");
}
// Dump frame markers
i::PrintF(out, "\n# List of known V8 Frame Markers.\n");
#define DUMP_MARKER(T, class) i::PrintF(out, " \"%s\",\n", #T);
i::PrintF(out, "FRAME_MARKERS = (\n");
STACK_FRAME_TYPE_LIST(DUMP_MARKER)
i::PrintF(out, ")\n");
#undef DUMP_MARKER
}
i::PrintF(out, "\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[]) {
FILE* out = stdout;
if (argc > 2 && strcmp(argv[1], "--outfile") == 0) {
out = fopen(argv[2], "wb");
}
return v8::DumpHeapConstants(out, argv[0]);
}
|
