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// Copyright 2013 the V8 project authors. All rights reserved.
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following
// disclaimer in the documentation and/or other materials provided
// with the distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived
// from this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
#ifndef V8_ASSERT_SCOPE_H_
#define V8_ASSERT_SCOPE_H_
#include "allocation.h"
#include "platform.h"
namespace v8 {
namespace internal {
class Isolate;
enum PerThreadAssertType {
HEAP_ALLOCATION_ASSERT,
HANDLE_ALLOCATION_ASSERT,
HANDLE_DEREFERENCE_ASSERT,
DEFERRED_HANDLE_DEREFERENCE_ASSERT,
CODE_DEPENDENCY_CHANGE_ASSERT,
LAST_PER_THREAD_ASSERT_TYPE
};
#ifdef DEBUG
class PerThreadAssertData {
public:
PerThreadAssertData() : nesting_level_(0) {
for (int i = 0; i < LAST_PER_THREAD_ASSERT_TYPE; i++) {
assert_states_[i] = true;
}
}
void set(PerThreadAssertType type, bool allow) {
assert_states_[type] = allow;
}
bool get(PerThreadAssertType type) const {
return assert_states_[type];
}
void increment_level() { ++nesting_level_; }
bool decrement_level() { return --nesting_level_ == 0; }
private:
bool assert_states_[LAST_PER_THREAD_ASSERT_TYPE];
int nesting_level_;
DISALLOW_COPY_AND_ASSIGN(PerThreadAssertData);
};
#endif // DEBUG
class PerThreadAssertScopeBase {
#ifdef DEBUG
protected:
PerThreadAssertScopeBase() {
data_ = GetAssertData();
if (data_ == NULL) {
data_ = new PerThreadAssertData();
SetThreadLocalData(data_);
}
data_->increment_level();
}
~PerThreadAssertScopeBase() {
if (!data_->decrement_level()) return;
for (int i = 0; i < LAST_PER_THREAD_ASSERT_TYPE; i++) {
ASSERT(data_->get(static_cast<PerThreadAssertType>(i)));
}
delete data_;
SetThreadLocalData(NULL);
}
static PerThreadAssertData* GetAssertData() {
return reinterpret_cast<PerThreadAssertData*>(
Thread::GetThreadLocal(thread_local_key));
}
static Thread::LocalStorageKey thread_local_key;
PerThreadAssertData* data_;
friend class Isolate;
private:
static void SetThreadLocalData(PerThreadAssertData* data) {
Thread::SetThreadLocal(thread_local_key, data);
}
#endif // DEBUG
};
template <PerThreadAssertType type, bool allow>
class PerThreadAssertScope : public PerThreadAssertScopeBase {
public:
#ifndef DEBUG
PerThreadAssertScope() { }
static void SetIsAllowed(bool is_allowed) { }
#else
PerThreadAssertScope() {
old_state_ = data_->get(type);
data_->set(type, allow);
}
~PerThreadAssertScope() { data_->set(type, old_state_); }
static bool IsAllowed() {
PerThreadAssertData* data = GetAssertData();
return data == NULL || data->get(type);
}
private:
bool old_state_;
#endif
};
// Scope to document where we do not expect handles to be created.
typedef PerThreadAssertScope<HANDLE_ALLOCATION_ASSERT, false>
DisallowHandleAllocation;
// Scope to introduce an exception to DisallowHandleAllocation.
typedef PerThreadAssertScope<HANDLE_ALLOCATION_ASSERT, true>
AllowHandleAllocation;
// Scope to document where we do not expect any allocation and GC.
typedef PerThreadAssertScope<HEAP_ALLOCATION_ASSERT, false>
DisallowHeapAllocation;
// Scope to introduce an exception to DisallowHeapAllocation.
typedef PerThreadAssertScope<HEAP_ALLOCATION_ASSERT, true>
AllowHeapAllocation;
// Scope to document where we do not expect any handle dereferences.
typedef PerThreadAssertScope<HANDLE_DEREFERENCE_ASSERT, false>
DisallowHandleDereference;
// Scope to introduce an exception to DisallowHandleDereference.
typedef PerThreadAssertScope<HANDLE_DEREFERENCE_ASSERT, true>
AllowHandleDereference;
// Scope to document where we do not expect deferred handles to be dereferenced.
typedef PerThreadAssertScope<DEFERRED_HANDLE_DEREFERENCE_ASSERT, false>
DisallowDeferredHandleDereference;
// Scope to introduce an exception to DisallowDeferredHandleDereference.
typedef PerThreadAssertScope<DEFERRED_HANDLE_DEREFERENCE_ASSERT, true>
AllowDeferredHandleDereference;
// Scope to document where we do not expect deferred handles to be dereferenced.
typedef PerThreadAssertScope<CODE_DEPENDENCY_CHANGE_ASSERT, false>
DisallowCodeDependencyChange;
// Scope to introduce an exception to DisallowDeferredHandleDereference.
typedef PerThreadAssertScope<CODE_DEPENDENCY_CHANGE_ASSERT, true>
AllowCodeDependencyChange;
} } // namespace v8::internal
#endif // V8_ASSERT_SCOPE_H_
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