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assert-scope.cc
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// Copyright 2014 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/assert-scope.h"
#include "src/base/lazy-instance.h"
#include "src/base/platform/platform.h"
#include "src/isolate.h"
#include "src/utils.h"
namespace v8 {
namespace internal {
namespace {
struct PerThreadAssertKeyConstructTrait final {
static void Construct(void* key_arg) {
auto key = reinterpret_cast<base::Thread::LocalStorageKey*>(key_arg);
*key = base::Thread::CreateThreadLocalKey();
}
};
typedef base::LazyStaticInstance<base::Thread::LocalStorageKey,
PerThreadAssertKeyConstructTrait>::type
PerThreadAssertKey;
PerThreadAssertKey kPerThreadAssertKey;
} // namespace
class PerThreadAssertData final {
public:
PerThreadAssertData() : nesting_level_(0) {
for (int i = 0; i < LAST_PER_THREAD_ASSERT_TYPE; i++) {
assert_states_[i] = true;
}
}
~PerThreadAssertData() {
for (int i = 0; i < LAST_PER_THREAD_ASSERT_TYPE; ++i) {
DCHECK(assert_states_[i]);
}
}
bool Get(PerThreadAssertType type) const { return assert_states_[type]; }
void Set(PerThreadAssertType type, bool x) { assert_states_[type] = x; }
void IncrementLevel() { ++nesting_level_; }
bool DecrementLevel() { return --nesting_level_ == 0; }
static PerThreadAssertData* GetCurrent() {
return reinterpret_cast<PerThreadAssertData*>(
base::Thread::GetThreadLocal(kPerThreadAssertKey.Get()));
}
static void SetCurrent(PerThreadAssertData* data) {
base::Thread::SetThreadLocal(kPerThreadAssertKey.Get(), data);
}
private:
bool assert_states_[LAST_PER_THREAD_ASSERT_TYPE];
int nesting_level_;
DISALLOW_COPY_AND_ASSIGN(PerThreadAssertData);
};
template <PerThreadAssertType kType, bool kAllow>
PerThreadAssertScope<kType, kAllow>::PerThreadAssertScope()
: data_(PerThreadAssertData::GetCurrent()) {
if (data_ == NULL) {
data_ = new PerThreadAssertData();
PerThreadAssertData::SetCurrent(data_);
}
data_->IncrementLevel();
old_state_ = data_->Get(kType);
data_->Set(kType, kAllow);
}
template <PerThreadAssertType kType, bool kAllow>
PerThreadAssertScope<kType, kAllow>::~PerThreadAssertScope() {
if (data_ == nullptr) return;
Release();
}
template <PerThreadAssertType kType, bool kAllow>
void PerThreadAssertScope<kType, kAllow>::Release() {
DCHECK_NOT_NULL(data_);
data_->Set(kType, old_state_);
if (data_->DecrementLevel()) {
PerThreadAssertData::SetCurrent(NULL);
delete data_;
}
data_ = nullptr;
}
// static
template <PerThreadAssertType kType, bool kAllow>
bool PerThreadAssertScope<kType, kAllow>::IsAllowed() {
PerThreadAssertData* data = PerThreadAssertData::GetCurrent();
return data == NULL || data->Get(kType);
}
template <PerIsolateAssertType kType, bool kAllow>
class PerIsolateAssertScope<kType, kAllow>::DataBit
: public BitField<bool, kType, 1> {};
template <PerIsolateAssertType kType, bool kAllow>
PerIsolateAssertScope<kType, kAllow>::PerIsolateAssertScope(Isolate* isolate)
: isolate_(isolate), old_data_(isolate->per_isolate_assert_data()) {
DCHECK_NOT_NULL(isolate);
STATIC_ASSERT(kType < 32);
isolate_->set_per_isolate_assert_data(DataBit::update(old_data_, kAllow));
}
template <PerIsolateAssertType kType, bool kAllow>
PerIsolateAssertScope<kType, kAllow>::~PerIsolateAssertScope() {
isolate_->set_per_isolate_assert_data(old_data_);
}
// static
template <PerIsolateAssertType kType, bool kAllow>
bool PerIsolateAssertScope<kType, kAllow>::IsAllowed(Isolate* isolate) {
return DataBit::decode(isolate->per_isolate_assert_data());
}
// -----------------------------------------------------------------------------
// Instantiations.
template class PerThreadAssertScope<HEAP_ALLOCATION_ASSERT, false>;
template class PerThreadAssertScope<HEAP_ALLOCATION_ASSERT, true>;
template class PerThreadAssertScope<HANDLE_ALLOCATION_ASSERT, false>;
template class PerThreadAssertScope<HANDLE_ALLOCATION_ASSERT, true>;
template class PerThreadAssertScope<HANDLE_DEREFERENCE_ASSERT, false>;
template class PerThreadAssertScope<HANDLE_DEREFERENCE_ASSERT, true>;
template class PerThreadAssertScope<DEFERRED_HANDLE_DEREFERENCE_ASSERT, false>;
template class PerThreadAssertScope<DEFERRED_HANDLE_DEREFERENCE_ASSERT, true>;
template class PerThreadAssertScope<CODE_DEPENDENCY_CHANGE_ASSERT, false>;
template class PerThreadAssertScope<CODE_DEPENDENCY_CHANGE_ASSERT, true>;
template class PerIsolateAssertScope<JAVASCRIPT_EXECUTION_ASSERT, false>;
template class PerIsolateAssertScope<JAVASCRIPT_EXECUTION_ASSERT, true>;
template class PerIsolateAssertScope<JAVASCRIPT_EXECUTION_THROWS, false>;
template class PerIsolateAssertScope<JAVASCRIPT_EXECUTION_THROWS, true>;
template class PerIsolateAssertScope<DEOPTIMIZATION_ASSERT, false>;
template class PerIsolateAssertScope<DEOPTIMIZATION_ASSERT, true>;
template class PerIsolateAssertScope<COMPILATION_ASSERT, false>;
template class PerIsolateAssertScope<COMPILATION_ASSERT, true>;
template class PerIsolateAssertScope<NO_EXCEPTION_ASSERT, false>;
template class PerIsolateAssertScope<NO_EXCEPTION_ASSERT, true>;
} // namespace internal
} // namespace v8