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// 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__
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