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-// Copyright (c) 2011, Google Inc.
-// 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.
-
-// crash_generator.h: Define the google_breakpad::CrashGenerator class,
-// which is used to generate a crash (and a core dump file) for testing.
-
-#ifndef COMMON_LINUX_TESTS_CRASH_GENERATOR_H_
-#define COMMON_LINUX_TESTS_CRASH_GENERATOR_H_
-
-#include <sys/resource.h>
-
-#include <string>
-
-#include "common/tests/auto_tempdir.h"
-#include "common/using_std_string.h"
-
-namespace google_breakpad {
-
-// A utility class for generating a crash (and a core dump file) for
-// testing. It creates a child process with the specified number of
-// threads, which is then termainated by the specified signal. A core
-// dump file is expected to be created upon the termination of the child
-// process, which can then be used for testing code that processes core
-// dump files.
-class CrashGenerator {
- public:
- CrashGenerator();
-
- ~CrashGenerator();
-
- // Returns true if a core dump file named 'core' will be generated in
- // the current directory for a test that produces a crash by checking
- // if /proc/sys/kernel/core_pattern has the default value 'core'.
- bool HasDefaultCorePattern() const;
-
- // Returns the expected path of the core dump file.
- string GetCoreFilePath() const;
-
- // Returns the directory of a copy of proc files of the child process.
- string GetDirectoryOfProcFilesCopy() const;
-
- // Creates a crash (and a core dump file) by creating a child process with
- // |num_threads| threads, and the terminating the child process by sending
- // a signal with number |crash_signal| to the |crash_thread|-th thread.
- // Returns true on success.
- bool CreateChildCrash(unsigned num_threads, unsigned crash_thread,
- int crash_signal, pid_t* child_pid);
-
- // Returns the thread ID of the |index|-th thread in the child process.
- // This method does not validate |index|.
- pid_t GetThreadId(unsigned index) const;
-
- private:
- // Copies the following proc files of the process with |pid| to the directory
- // at |path|: auxv, cmdline, environ, maps, status
- // The directory must have been created. Returns true on success.
- bool CopyProcFiles(pid_t pid, const char* path) const;
-
- // Creates |num_threads| threads in the child process.
- void CreateThreadsInChildProcess(unsigned num_threads);
-
- // Sets the maximum size of core dump file (both the soft and hard limit)
- // to |limit| bytes. Returns true on success.
- bool SetCoreFileSizeLimit(rlim_t limit) const;
-
- // Creates a shared memory of |memory_size| bytes for communicating thread
- // IDs between the parent and child process. Returns true on success.
- bool MapSharedMemory(size_t memory_size);
-
- // Releases any shared memory created by MapSharedMemory(). Returns true on
- // success.
- bool UnmapSharedMemory();
-
- // Returns the pointer to the thread ID of the |index|-th thread in the child
- // process. This method does not validate |index|.
- pid_t* GetThreadIdPointer(unsigned index);
-
- // Temporary directory in which a core file is generated.
- AutoTempDir temp_dir_;
-
- // Shared memory for communicating thread IDs between the parent and
- // child process.
- void* shared_memory_;
-
- // Number of bytes mapped for |shared_memory_|.
- size_t shared_memory_size_;
-};
-
-} // namespace google_breakpad
-
-#endif // COMMON_LINUX_TESTS_CRASH_GENERATOR_H_