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// 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, CamelName) \
if (n == NULL && o == roots.name()) n = #CamelName;
#define MUTABLE_ROOT_LIST_CASE(type, name, CamelName) \
if (n == NULL && o == space->heap()->name()) n = #CamelName;
static void DumpMaps(i::PagedSpace* space) {
i::HeapObjectIterator it(space);
i::ReadOnlyRoots roots(space->heap());
for (i::HeapObject o = it.Next(); !o.is_null(); o = it.Next()) {
if (!o->IsMap()) continue;
i::Map m = i::Map::cast(o);
const char* n = nullptr;
intptr_t p = static_cast<intptr_t>(m.ptr()) & 0x7FFFF;
int t = m->instance_type();
READ_ONLY_ROOT_LIST(RO_ROOT_LIST_CASE)
MUTABLE_ROOT_LIST(MUTABLE_ROOT_LIST_CASE)
if (n == nullptr) continue;
const char* sname = space->name();
i::PrintF(" (\"%s\", 0x%05" V8PRIxPTR "): (%d, \"%s\"),\n", sname, p, t,
n);
}
}
#undef MUTABLE_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, CamelName) \
if (n == NULL && o == roots.name()) { \
n = #CamelName; \
i = i::RootIndex::k##CamelName; \
}
#define ROOT_LIST_CASE(type, name, CamelName) \
if (n == NULL && o == heap->name()) { \
n = #CamelName; \
i = i::RootIndex::k##CamelName; \
}
i::PagedSpaces spit(heap, i::PagedSpaces::SpacesSpecifier::kAllPagedSpaces);
i::PrintF("KNOWN_OBJECTS = {\n");
for (i::PagedSpace* s = spit.next(); s != nullptr; 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::HeapObject o = it.Next(); !o.is_null(); o = it.Next()) {
// Skip maps in RO_SPACE since they will be reported elsewhere.
if (o->IsMap()) continue;
const char* n = nullptr;
i::RootIndex i = i::RootIndex::kFirstSmiRoot;
intptr_t p = o.ptr() & 0x7FFFF;
STRONG_READ_ONLY_ROOT_LIST(RO_ROOT_LIST_CASE)
MUTABLE_ROOT_LIST(ROOT_LIST_CASE)
if (n == nullptr) continue;
if (!i::RootsTable::IsImmortalImmovable(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]); }
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