| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #ifndef SANDBOX_LINUX_SECCOMP_BPF_DIE_H__ |
| #define SANDBOX_LINUX_SECCOMP_BPF_DIE_H__ |
| |
| #include "base/macros.h" |
| #include "sandbox/sandbox_export.h" |
| |
| namespace sandbox { |
| |
| // This is the main API for using this file. Prints a error message and |
| // exits with a fatal error. This is not async-signal safe. |
| #define SANDBOX_DIE(m) sandbox::Die::SandboxDie(m, __FILE__, __LINE__) |
| |
| // An async signal safe version of the same API. Won't print the filename |
| // and line numbers. |
| #define RAW_SANDBOX_DIE(m) sandbox::Die::RawSandboxDie(m) |
| |
| // Adds an informational message to the log file or stderr as appropriate. |
| #define SANDBOX_INFO(m) sandbox::Die::SandboxInfo(m, __FILE__, __LINE__) |
| |
| class SANDBOX_EXPORT Die { |
| public: |
| // Terminate the program, even if the current sandbox policy prevents some |
| // of the more commonly used functions used for exiting. |
| // Most users would want to call SANDBOX_DIE() instead, as it logs extra |
| // information. But calling ExitGroup() is correct and in some rare cases |
| // preferable. So, we make it part of the public API. |
| static void ExitGroup() __attribute__((noreturn)); |
| |
| // This method gets called by SANDBOX_DIE(). There is normally no reason |
| // to call it directly unless you are defining your own exiting macro. |
| static void SandboxDie(const char* msg, const char* file, int line) |
| __attribute__((noreturn)); |
| |
| static void RawSandboxDie(const char* msg) __attribute__((noreturn)); |
| |
| // This method gets called by SANDBOX_INFO(). There is normally no reason |
| // to call it directly unless you are defining your own logging macro. |
| static void SandboxInfo(const char* msg, const char* file, int line); |
| |
| // Writes a message to stderr. Used as a fall-back choice, if we don't have |
| // any other way to report an error. |
| static void LogToStderr(const char* msg, const char* file, int line); |
| |
| // We generally want to run all exit handlers. This means, on SANDBOX_DIE() |
| // we should be calling LOG(FATAL). But there are some situations where |
| // we just need to print a message and then terminate. This would typically |
| // happen in cases where we consume the error message internally (e.g. in |
| // unit tests or in the supportsSeccompSandbox() method). |
| static void EnableSimpleExit() { simple_exit_ = true; } |
| |
| // Sometimes we need to disable all informational messages (e.g. from within |
| // unittests). |
| static void SuppressInfoMessages(bool flag) { suppress_info_ = flag; } |
| |
| private: |
| static bool simple_exit_; |
| static bool suppress_info_; |
| |
| DISALLOW_IMPLICIT_CONSTRUCTORS(Die); |
| }; |
| |
| } // namespace sandbox |
| |
| #endif // SANDBOX_LINUX_SECCOMP_BPF_DIE_H__ |