v8/test/cctest/test-roots.cc

// Copyright 2018 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 "src/heap/heap.h"
#include "src/roots-inl.h"
#include "test/cctest/cctest.h"

namespace v8 {
namespace internal {

namespace {
AllocationSpace GetSpaceFromObject(Object* object) {
  DCHECK(object->IsHeapObject());
  return MemoryChunk::FromHeapObject(HeapObject::cast(object))
      ->owner()
      ->identity();
}
}  // namespace

#define CHECK_IN_RO_SPACE(name)    \
  HeapObject* name = roots.name(); \
  CHECK_EQ(RO_SPACE, GetSpaceFromObject(name));

// The following tests check that all the roots accessible via ReadOnlyRoots are
// in RO_SPACE.
TEST(TestStrongReadOnlyRoots) {
  ReadOnlyRoots roots(CcTest::i_isolate());

#define TEST_ROOT(type, name, camel_name) CHECK_IN_RO_SPACE(name)
  STRONG_READ_ONLY_ROOT_LIST(TEST_ROOT)
#undef TEST_ROOT
}

TEST(TestInternalizedStrings) {
  ReadOnlyRoots roots(CcTest::i_isolate());

#define TEST_ROOT(name, str) CHECK_IN_RO_SPACE(name)
  INTERNALIZED_STRING_LIST(TEST_ROOT)
#undef TEST_ROOT
}

TEST(TestPrivateSymbols) {
  ReadOnlyRoots roots(CcTest::i_isolate());

  PRIVATE_SYMBOL_LIST(CHECK_IN_RO_SPACE)
}

TEST(TestPublicSymbols) {
  ReadOnlyRoots roots(CcTest::i_isolate());

#define TEST_ROOT(name, description) CHECK_IN_RO_SPACE(name)
  PUBLIC_SYMBOL_LIST(TEST_ROOT)
  WELL_KNOWN_SYMBOL_LIST(TEST_ROOT)
#undef TEST_ROOT
}

TEST(TestStructMaps) {
  ReadOnlyRoots roots(CcTest::i_isolate());

#define TEST_ROOT(NAME, Name, name) CHECK_IN_RO_SPACE(name##_map)
  STRUCT_LIST(TEST_ROOT)
#undef TEST_ROOT
}

TEST(TestAllocationSiteMaps) {
  ReadOnlyRoots roots(CcTest::i_isolate());

#define TEST_ROOT(NAME, Name, Size, name) CHECK_IN_RO_SPACE(name##_map)
  ALLOCATION_SITE_LIST(TEST_ROOT)
#undef TEST_ROOT
}

#undef CHECK_IN_RO_SPACE

namespace {
bool IsInitiallyMutable(Heap* heap, Object* object) {
// Entries in this list are in STRONG_MUTABLE_ROOT_LIST, but may initially point
// to objects that in RO_SPACE.
#define INITIALLY_READ_ONLY_ROOT_LIST(V) \
  V(materialized_objects)                \
  V(retaining_path_targets)              \
  V(retained_maps)

#define TEST_CAN_BE_READ_ONLY(name) \
  if (heap->name() == object) return false;
  INITIALLY_READ_ONLY_ROOT_LIST(TEST_CAN_BE_READ_ONLY)
#undef TEST_CAN_BE_READ_ONLY
#undef INITIALLY_READ_ONLY_ROOT_LIST
  return true;
}
}  // namespace

#define CHECK_NOT_IN_RO_SPACE(name)                           \
  Object* name = heap->name();                                \
  if (name->IsHeapObject() && IsInitiallyMutable(heap, name)) \
    CHECK_NE(RO_SPACE, GetSpaceFromObject(name));

// The following tests check that all the roots accessible via public Heap
// accessors are not in RO_SPACE with the exception of the objects listed in
// INITIALLY_READ_ONLY_ROOT_LIST.
TEST(TestHeapRootsNotReadOnly) {
  Heap* heap = CcTest::i_isolate()->heap();

#define TEST_ROOT(type, name, camel_name) CHECK_NOT_IN_RO_SPACE(name)
  MUTABLE_ROOT_LIST(TEST_ROOT)
#undef TEST_ROOT
}

TEST(TestAccessorInfosNotReadOnly) {
  Heap* heap = CcTest::i_isolate()->heap();

#define TEST_ROOT(name, AccessorName) CHECK_NOT_IN_RO_SPACE(name##_accessor)
  ACCESSOR_INFO_LIST(TEST_ROOT)
#undef TEST_ROOT
}

#undef CHECK_NOT_IN_RO_SPACE

}  // namespace internal
}  // namespace v8