v8/test/mkgrokdump/mkgrokdump.cc

186 lines
6.5 KiB
C++
Raw Normal View History

// 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"
Reland "[heap] Skip ro-space from heap iterators, add CombinedHeapIterator." Code relocation info is now always allocated in old-space. Before relocation info allocated for placeholders and builtins (which get replaced with trampolines in nosnap builds) would become unreachable. Since read-only space is not GCed and ReadOnlyHeapIterator doesn't check for reachability, ValidateSnapshot would fail finding unreachable objects returned by ReadOnlyHeapIterator. Because trampoline relocation info gets replaced with canonical one, this only affects no-embdded-builtins nosnap builds, which don't get much benefit from read-only relocation info anyway. A new check has been added to the read-only deserializer to verify that every read-only object is reachable at mksnapshot-time. The CombinedHeapIterator iteration order was changed to iterate over read-only space first, because that's how HeapIterator worked. This is a reland of 3d1d8eae772877422e7082571e77c326e7e8e60a Original change's description: > [heap] Skip ro-space from heap iterators, add CombinedHeapIterator. > > Read-only space sharing requires an iterator independent of heap. This > also enables future removal of read-only space from heap. > > Bug: v8:7464 > Change-Id: Ia07a9369494ea2c547d12c01ffa1d7b8b6bbeabc > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1552795 > Commit-Queue: Maciej Goszczycki <goszczycki@google.com> > Reviewed-by: Ulan Degenbaev <ulan@chromium.org> > Reviewed-by: Dan Elphick <delphick@chromium.org> > Cr-Commit-Position: refs/heads/master@{#60819} Bug: v8:7464 Change-Id: I49ae070955b77956962334a84f762ab29052d5ff Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1566513 Reviewed-by: Dan Elphick <delphick@chromium.org> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Commit-Queue: Maciej Goszczycki <goszczycki@google.com> Cr-Commit-Position: refs/heads/master@{#61185}
2019-05-02 15:35:51 +00:00
#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";
// 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 {}
};
static void DumpKnownMap(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(" (\"%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
}
Reland "[heap] Skip ro-space from heap iterators, add CombinedHeapIterator." Code relocation info is now always allocated in old-space. Before relocation info allocated for placeholders and builtins (which get replaced with trampolines in nosnap builds) would become unreachable. Since read-only space is not GCed and ReadOnlyHeapIterator doesn't check for reachability, ValidateSnapshot would fail finding unreachable objects returned by ReadOnlyHeapIterator. Because trampoline relocation info gets replaced with canonical one, this only affects no-embdded-builtins nosnap builds, which don't get much benefit from read-only relocation info anyway. A new check has been added to the read-only deserializer to verify that every read-only object is reachable at mksnapshot-time. The CombinedHeapIterator iteration order was changed to iterate over read-only space first, because that's how HeapIterator worked. This is a reland of 3d1d8eae772877422e7082571e77c326e7e8e60a Original change's description: > [heap] Skip ro-space from heap iterators, add CombinedHeapIterator. > > Read-only space sharing requires an iterator independent of heap. This > also enables future removal of read-only space from heap. > > Bug: v8:7464 > Change-Id: Ia07a9369494ea2c547d12c01ffa1d7b8b6bbeabc > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1552795 > Commit-Queue: Maciej Goszczycki <goszczycki@google.com> > Reviewed-by: Ulan Degenbaev <ulan@chromium.org> > Reviewed-by: Dan Elphick <delphick@chromium.org> > Cr-Commit-Position: refs/heads/master@{#60819} Bug: v8:7464 Change-Id: I49ae070955b77956962334a84f762ab29052d5ff Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1566513 Reviewed-by: Dan Elphick <delphick@chromium.org> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Commit-Queue: Maciej Goszczycki <goszczycki@google.com> Cr-Commit-Position: refs/heads/master@{#61185}
2019-05-02 15:35:51 +00:00
static void DumpKnownObject(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; \
Reland "[heap] Skip ro-space from heap iterators, add CombinedHeapIterator." Code relocation info is now always allocated in old-space. Before relocation info allocated for placeholders and builtins (which get replaced with trampolines in nosnap builds) would become unreachable. Since read-only space is not GCed and ReadOnlyHeapIterator doesn't check for reachability, ValidateSnapshot would fail finding unreachable objects returned by ReadOnlyHeapIterator. Because trampoline relocation info gets replaced with canonical one, this only affects no-embdded-builtins nosnap builds, which don't get much benefit from read-only relocation info anyway. A new check has been added to the read-only deserializer to verify that every read-only object is reachable at mksnapshot-time. The CombinedHeapIterator iteration order was changed to iterate over read-only space first, because that's how HeapIterator worked. This is a reland of 3d1d8eae772877422e7082571e77c326e7e8e60a Original change's description: > [heap] Skip ro-space from heap iterators, add CombinedHeapIterator. > > Read-only space sharing requires an iterator independent of heap. This > also enables future removal of read-only space from heap. > > Bug: v8:7464 > Change-Id: Ia07a9369494ea2c547d12c01ffa1d7b8b6bbeabc > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1552795 > Commit-Queue: Maciej Goszczycki <goszczycki@google.com> > Reviewed-by: Ulan Degenbaev <ulan@chromium.org> > Reviewed-by: Dan Elphick <delphick@chromium.org> > Cr-Commit-Position: refs/heads/master@{#60819} Bug: v8:7464 Change-Id: I49ae070955b77956962334a84f762ab29052d5ff Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1566513 Reviewed-by: Dan Elphick <delphick@chromium.org> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Commit-Queue: Maciej Goszczycki <goszczycki@google.com> Cr-Commit-Position: refs/heads/master@{#61185}
2019-05-02 15:35:51 +00:00
}
#define ROOT_LIST_CASE(type, name, CamelName) \
if (root_name == nullptr && object == heap->name()) { \
root_name = #CamelName; \
root_index = i::RootIndex::k##CamelName; \
Reland "[heap] Skip ro-space from heap iterators, add CombinedHeapIterator." Code relocation info is now always allocated in old-space. Before relocation info allocated for placeholders and builtins (which get replaced with trampolines in nosnap builds) would become unreachable. Since read-only space is not GCed and ReadOnlyHeapIterator doesn't check for reachability, ValidateSnapshot would fail finding unreachable objects returned by ReadOnlyHeapIterator. Because trampoline relocation info gets replaced with canonical one, this only affects no-embdded-builtins nosnap builds, which don't get much benefit from read-only relocation info anyway. A new check has been added to the read-only deserializer to verify that every read-only object is reachable at mksnapshot-time. The CombinedHeapIterator iteration order was changed to iterate over read-only space first, because that's how HeapIterator worked. This is a reland of 3d1d8eae772877422e7082571e77c326e7e8e60a Original change's description: > [heap] Skip ro-space from heap iterators, add CombinedHeapIterator. > > Read-only space sharing requires an iterator independent of heap. This > also enables future removal of read-only space from heap. > > Bug: v8:7464 > Change-Id: Ia07a9369494ea2c547d12c01ffa1d7b8b6bbeabc > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1552795 > Commit-Queue: Maciej Goszczycki <goszczycki@google.com> > Reviewed-by: Ulan Degenbaev <ulan@chromium.org> > Reviewed-by: Dan Elphick <delphick@chromium.org> > Cr-Commit-Position: refs/heads/master@{#60819} Bug: v8:7464 Change-Id: I49ae070955b77956962334a84f762ab29052d5ff Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1566513 Reviewed-by: Dan Elphick <delphick@chromium.org> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Commit-Queue: Maciej Goszczycki <goszczycki@google.com> Cr-Commit-Position: refs/heads/master@{#61185}
2019-05-02 15:35:51 +00:00
}
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(" (\"%s\", 0x%05" V8PRIxPTR "): \"%s\",\n", space_name, root_ptr,
root_name);
#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::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");
i::ReadOnlyHeapObjectIterator ro_iterator(heap->read_only_heap());
for (i::HeapObject object = ro_iterator.Next(); !object.is_null();
object = ro_iterator.Next()) {
if (!object.IsMap()) continue;
DumpKnownMap(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(heap, i::Heap::GetSpaceName(i::MAP_SPACE), object);
}
i::PrintF("}\n");
Reland "[heap] Skip ro-space from heap iterators, add CombinedHeapIterator." Code relocation info is now always allocated in old-space. Before relocation info allocated for placeholders and builtins (which get replaced with trampolines in nosnap builds) would become unreachable. Since read-only space is not GCed and ReadOnlyHeapIterator doesn't check for reachability, ValidateSnapshot would fail finding unreachable objects returned by ReadOnlyHeapIterator. Because trampoline relocation info gets replaced with canonical one, this only affects no-embdded-builtins nosnap builds, which don't get much benefit from read-only relocation info anyway. A new check has been added to the read-only deserializer to verify that every read-only object is reachable at mksnapshot-time. The CombinedHeapIterator iteration order was changed to iterate over read-only space first, because that's how HeapIterator worked. This is a reland of 3d1d8eae772877422e7082571e77c326e7e8e60a Original change's description: > [heap] Skip ro-space from heap iterators, add CombinedHeapIterator. > > Read-only space sharing requires an iterator independent of heap. This > also enables future removal of read-only space from heap. > > Bug: v8:7464 > Change-Id: Ia07a9369494ea2c547d12c01ffa1d7b8b6bbeabc > Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1552795 > Commit-Queue: Maciej Goszczycki <goszczycki@google.com> > Reviewed-by: Ulan Degenbaev <ulan@chromium.org> > Reviewed-by: Dan Elphick <delphick@chromium.org> > Cr-Commit-Position: refs/heads/master@{#60819} Bug: v8:7464 Change-Id: I49ae070955b77956962334a84f762ab29052d5ff Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1566513 Reviewed-by: Dan Elphick <delphick@chromium.org> Reviewed-by: Ulan Degenbaev <ulan@chromium.org> Commit-Queue: Maciej Goszczycki <goszczycki@google.com> Cr-Commit-Position: refs/heads/master@{#61185}
2019-05-02 15:35:51 +00:00
}
{
// Dump the KNOWN_OBJECTS table to the console.
i::PrintF("\n# List of known V8 objects.\n");
i::PrintF("KNOWN_OBJECTS = {\n");
i::ReadOnlyHeapObjectIterator ro_iterator(heap->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(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(heap, sname, o);
}
}
i::PrintF("}\n");
}
// 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]); }