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156 lines
6.8 KiB
C++
156 lines
6.8 KiB
C++
// Copyright (c) 2013 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// This file contains routines to kill processes and get the exit code and
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// termination status.
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#ifndef BASE_PROCESS_KILL_H_
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#define BASE_PROCESS_KILL_H_
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#include "base/files/file_path.h"
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#include "base/process/process.h"
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#include "base/process/process_handle.h"
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#include "base/time/time.h"
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#include "build/build_config.h"
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namespace base {
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class ProcessFilter;
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#if defined(OS_WIN)
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namespace win {
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// See definition in sandbox/win/src/sandbox_types.h
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const DWORD kSandboxFatalMemoryExceeded = 7012;
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// Exit codes with special meanings on Windows.
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const DWORD kNormalTerminationExitCode = 0;
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const DWORD kDebuggerInactiveExitCode = 0xC0000354;
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const DWORD kKeyboardInterruptExitCode = 0xC000013A;
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const DWORD kDebuggerTerminatedExitCode = 0x40010004;
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// This exit code is used by the Windows task manager when it kills a
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// process. It's value is obviously not that unique, and it's
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// surprising to me that the task manager uses this value, but it
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// seems to be common practice on Windows to test for it as an
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// indication that the task manager has killed something if the
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// process goes away.
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const DWORD kProcessKilledExitCode = 1;
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} // namespace win
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#endif // OS_WIN
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// Return status values from GetTerminationStatus. Don't use these as
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// exit code arguments to KillProcess*(), use platform/application
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// specific values instead.
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enum TerminationStatus {
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TERMINATION_STATUS_NORMAL_TERMINATION, // zero exit status
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TERMINATION_STATUS_ABNORMAL_TERMINATION, // non-zero exit status
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TERMINATION_STATUS_PROCESS_WAS_KILLED, // e.g. SIGKILL or task manager kill
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TERMINATION_STATUS_PROCESS_CRASHED, // e.g. Segmentation fault
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TERMINATION_STATUS_STILL_RUNNING, // child hasn't exited yet
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#if defined(OS_CHROMEOS)
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// Used for the case when oom-killer kills a process on ChromeOS.
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TERMINATION_STATUS_PROCESS_WAS_KILLED_BY_OOM,
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#endif
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#if defined(OS_ANDROID)
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// On Android processes are spawned from the system Zygote and we do not get
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// the termination status. We can't know if the termination was a crash or an
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// oom kill for sure, but we can use status of the strong process bindings as
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// a hint.
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TERMINATION_STATUS_OOM_PROTECTED, // child was protected from oom kill
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#endif
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TERMINATION_STATUS_LAUNCH_FAILED, // child process never launched
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TERMINATION_STATUS_OOM, // Process died due to oom
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TERMINATION_STATUS_MAX_ENUM
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};
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// Attempts to kill all the processes on the current machine that were launched
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// from the given executable name, ending them with the given exit code. If
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// filter is non-null, then only processes selected by the filter are killed.
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// Returns true if all processes were able to be killed off, false if at least
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// one couldn't be killed.
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BASE_EXPORT bool KillProcesses(const FilePath::StringType& executable_name,
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int exit_code,
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const ProcessFilter* filter);
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#if defined(OS_POSIX)
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// Attempts to kill the process group identified by |process_group_id|. Returns
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// true on success.
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BASE_EXPORT bool KillProcessGroup(ProcessHandle process_group_id);
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#endif // defined(OS_POSIX)
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// Get the termination status of the process by interpreting the
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// circumstances of the child process' death. |exit_code| is set to
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// the status returned by waitpid() on POSIX, and from GetExitCodeProcess() on
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// Windows, and may not be null. Note that on Linux, this function
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// will only return a useful result the first time it is called after
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// the child exits (because it will reap the child and the information
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// will no longer be available).
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BASE_EXPORT TerminationStatus GetTerminationStatus(ProcessHandle handle,
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int* exit_code);
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#if defined(OS_POSIX) && !defined(OS_FUCHSIA)
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// Send a kill signal to the process and then wait for the process to exit
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// and get the termination status.
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//
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// This is used in situations where it is believed that the process is dead
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// or dying (because communication with the child process has been cut).
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// In order to avoid erroneously returning that the process is still running
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// because the kernel is still cleaning it up, this will wait for the process
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// to terminate. In order to avoid the risk of hanging while waiting for the
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// process to terminate, send a SIGKILL to the process before waiting for the
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// termination status.
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//
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// Note that it is not an option to call WaitForExitCode and then
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// GetTerminationStatus as the child will be reaped when WaitForExitCode
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// returns, and this information will be lost.
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//
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BASE_EXPORT TerminationStatus GetKnownDeadTerminationStatus(
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ProcessHandle handle, int* exit_code);
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#if defined(OS_LINUX)
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// Spawns a thread to wait asynchronously for the child |process| to exit
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// and then reaps it.
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BASE_EXPORT void EnsureProcessGetsReaped(Process process);
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#endif // defined(OS_LINUX)
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#endif // defined(OS_POSIX) && !defined(OS_FUCHSIA)
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// Registers |process| to be asynchronously monitored for termination, forcibly
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// terminated if necessary, and reaped on exit. The caller should have signalled
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// |process| to exit before calling this API. The API will allow a couple of
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// seconds grace period before forcibly terminating |process|.
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// TODO(https://crbug.com/806451): The Mac implementation currently blocks the
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// calling thread for up to two seconds.
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BASE_EXPORT void EnsureProcessTerminated(Process process);
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// These are only sparingly used, and not needed on Fuchsia. They could be
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// implemented if necessary.
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#if !defined(OS_FUCHSIA)
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// Wait for all the processes based on the named executable to exit. If filter
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// is non-null, then only processes selected by the filter are waited on.
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// Returns after all processes have exited or wait_milliseconds have expired.
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// Returns true if all the processes exited, false otherwise.
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BASE_EXPORT bool WaitForProcessesToExit(
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const FilePath::StringType& executable_name,
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base::TimeDelta wait,
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const ProcessFilter* filter);
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// Waits a certain amount of time (can be 0) for all the processes with a given
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// executable name to exit, then kills off any of them that are still around.
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// If filter is non-null, then only processes selected by the filter are waited
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// on. Killed processes are ended with the given exit code. Returns false if
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// any processes needed to be killed, true if they all exited cleanly within
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// the wait_milliseconds delay.
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BASE_EXPORT bool CleanupProcesses(const FilePath::StringType& executable_name,
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base::TimeDelta wait,
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int exit_code,
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const ProcessFilter* filter);
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#endif // !defined(OS_FUCHSIA)
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} // namespace base
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#endif // BASE_PROCESS_KILL_H_
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