bd7458cb7f
This is a reland of commit 331c577e1d
Fix DCHECK for single generation builds.
Original change's description:
> [static-roots] Allow creating isolates from existing r/o snapshot
>
> This adds the ability to create an isolate from scratch, except the
> read only roots, which are initialized from a read_only_data snapshot.
> To do this we split the heap setup in a read/only part and the rest.
> The goal of these changes is to later support writing serializer tests,
> even if the read only roots are static and have to be loaded from a
> fixed snapshot.
>
> Bug: v8:13466
> Change-Id: I078695b95710e5281da013ca0c08af0e153b4725
> Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/4037271
> Reviewed-by: Igor Sheludko <ishell@chromium.org>
> Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
> Commit-Queue: Olivier Flückiger <olivf@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#84750}
Bug: v8:13466
Change-Id: Ic680b7620fc3176260c5d550e474412afef5f598
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/4092575
Reviewed-by: Igor Sheludko <ishell@chromium.org>
Commit-Queue: Olivier Flückiger <olivf@chromium.org>
Reviewed-by: Dominik Inführ <dinfuehr@chromium.org>
Cr-Commit-Position: refs/heads/main@{#84773}
111 lines
3.9 KiB
C++
111 lines
3.9 KiB
C++
// Copyright 2018 the V8 project authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "src/common/globals.h"
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#include "src/heap/basic-memory-chunk.h"
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#include "src/heap/heap-inl.h"
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#include "src/objects/cell.h"
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#include "src/objects/feedback-cell.h"
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#include "src/objects/script.h"
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#include "src/roots/roots-inl.h"
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#include "test/unittests/test-utils.h"
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#include "testing/gtest/include/gtest/gtest.h"
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namespace v8 {
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namespace internal {
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using RootsTest = TestWithIsolate;
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namespace {
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AllocationSpace GetSpaceFromObject(Object object) {
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DCHECK(object.IsHeapObject());
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BasicMemoryChunk* chunk =
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BasicMemoryChunk::FromHeapObject(HeapObject::cast(object));
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if (chunk->InReadOnlySpace()) return RO_SPACE;
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return chunk->owner()->identity();
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}
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} // namespace
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#define CHECK_IN_RO_SPACE(type, name, CamelName) \
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HeapObject name = roots.name(); \
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CHECK_EQ(RO_SPACE, GetSpaceFromObject(name));
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// The following tests check that all the roots accessible via ReadOnlyRoots are
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// in RO_SPACE.
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TEST_F(RootsTest, TestReadOnlyRoots) {
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ReadOnlyRoots roots(i_isolate());
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READ_ONLY_ROOT_LIST(CHECK_IN_RO_SPACE)
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}
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#undef CHECK_IN_RO_SPACE
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namespace {
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bool IsInitiallyMutable(Factory* factory, Address object_address) {
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// Entries in this list are in STRONG_MUTABLE_MOVABLE_ROOT_LIST, but may
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// initially point to objects that are in RO_SPACE.
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#define INITIALLY_READ_ONLY_ROOT_LIST(V) \
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V(api_private_symbol_table) \
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V(api_symbol_table) \
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V(basic_block_profiling_data) \
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V(builtins_constants_table) \
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V(current_microtask) \
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V(detached_contexts) \
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V(feedback_vectors_for_profiling_tools) \
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V(shared_wasm_memories) \
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V(materialized_objects) \
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V(public_symbol_table) \
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V(retaining_path_targets) \
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V(serialized_global_proxy_sizes) \
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V(serialized_objects) \
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IF_WASM(V, js_to_wasm_wrappers) \
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IF_WASM(V, wasm_canonical_rtts) \
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V(weak_refs_keep_during_job)
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#define TEST_CAN_BE_READ_ONLY(name) \
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if (factory->name().address() == object_address) return false;
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INITIALLY_READ_ONLY_ROOT_LIST(TEST_CAN_BE_READ_ONLY)
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#undef TEST_CAN_BE_READ_ONLY
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#undef INITIALLY_READ_ONLY_ROOT_LIST
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return true;
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}
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} // namespace
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// The CHECK_EQ line is there just to ensure that the root is publicly
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// accessible from Heap, but ultimately the factory is used as it provides
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// handles that have the address in the root table.
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#define CHECK_NOT_IN_RO_SPACE(type, name, CamelName) \
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Handle<Object> name = factory->name(); \
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CHECK_EQ(*name, heap->name()); \
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if (name->IsHeapObject() && IsInitiallyMutable(factory, name.address()) && \
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!name->IsUndefined(i_isolate())) { \
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CHECK_NE(RO_SPACE, GetSpaceFromObject(HeapObject::cast(*name))); \
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}
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// The following tests check that all the roots accessible via public Heap
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// accessors are not in RO_SPACE with the exception of the objects listed in
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// INITIALLY_READ_ONLY_ROOT_LIST.
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TEST_F(RootsTest, TestHeapRootsNotReadOnly) {
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Factory* factory = i_isolate()->factory();
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Heap* heap = i_isolate()->heap();
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MUTABLE_ROOT_LIST(CHECK_NOT_IN_RO_SPACE)
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}
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TEST_F(RootsTest, TestHeapNumberList) {
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ReadOnlyRoots roots(isolate());
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for (auto pos = RootIndex::kFirstReadOnlyRoot;
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pos <= RootIndex::kLastReadOnlyRoot; ++pos) {
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auto obj = Object(roots.at(pos));
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bool in_nr_range = pos >= RootIndex::kFirstHeapNumberRoot &&
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pos <= RootIndex::kLastHeapNumberRoot;
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CHECK_EQ(obj.IsHeapNumber(), in_nr_range);
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}
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}
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#undef CHECK_NOT_IN_RO_SPACE
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} // namespace internal
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} // namespace v8
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