diff options
| author | Evan Brown <ezb@google.com> | 2024-06-24 14:53:09 -0700 |
|---|---|---|
| committer | Copybara-Service <copybara-worker@google.com> | 2024-06-24 14:53:59 -0700 |
| commit | e486af700c822704d24f50a875c0bb0bdda18052 (patch) | |
| tree | b3ea58230ca0eefcfc36e55a0cf73d8083de7673 /absl/base/internal/poison.h | |
| parent | a305e859b6d0abe6d88a3fe12c6891152cc6e859 (diff) | |
| download | abseil-e486af700c822704d24f50a875c0bb0bdda18052.tar.gz abseil-e486af700c822704d24f50a875c0bb0bdda18052.tar.bz2 abseil-e486af700c822704d24f50a875c0bb0bdda18052.zip | |
Add an internal API to get a poisoned pointer.
The motivation is to make destroyed/moved-from objects cause crashes when they are accessed.
PiperOrigin-RevId: 646229564
Change-Id: I68d9c189b542df0933af08f5ad63dc1f5764d856
Diffstat (limited to 'absl/base/internal/poison.h')
| -rw-r--r-- | absl/base/internal/poison.h | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/absl/base/internal/poison.h b/absl/base/internal/poison.h new file mode 100644 index 00000000..aac1506a --- /dev/null +++ b/absl/base/internal/poison.h @@ -0,0 +1,36 @@ +// Copyright 2024 The Abseil Authors +// +// Licensed under the Apache License, Version 2.0 (the "License"); +// you may not use this file except in compliance with the License. +// You may obtain a copy of the License at +// +// https://www.apache.org/licenses/LICENSE-2.0 +// +// Unless required by applicable law or agreed to in writing, software +// distributed under the License is distributed on an "AS IS" BASIS, +// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +// See the License for the specific language governing permissions and +// limitations under the License. + +#ifndef ABSL_BASE_INTERNAL_POISON_H_ +#define ABSL_BASE_INTERNAL_POISON_H_ + +#include <atomic> + +#include "absl/base/config.h" + +namespace absl { +ABSL_NAMESPACE_BEGIN +namespace base_internal { + +extern std::atomic<void*> poison_data; + +inline void* get_poisoned_pointer() { + return poison_data.load(std::memory_order_relaxed); +} + +} // namespace base_internal +ABSL_NAMESPACE_END +} // namespace absl + +#endif // ABSL_BASE_INTERNAL_POISON_H_ |