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Diffstat (limited to 'trunk/src/base/thread_lister.h')
-rw-r--r-- | trunk/src/base/thread_lister.h | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/trunk/src/base/thread_lister.h b/trunk/src/base/thread_lister.h new file mode 100644 index 0000000..6afe4dd --- /dev/null +++ b/trunk/src/base/thread_lister.h @@ -0,0 +1,82 @@ +/* Copyright (c) 2005-2007, 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. + * + * --- + * Author: Markus Gutschke + */ + +#ifndef _THREAD_LISTER_H +#define _THREAD_LISTER_H + +#include <stdarg.h> +#include <sys/types.h> + +#ifdef __cplusplus +extern "C" { +#endif + +typedef int (*ListAllProcessThreadsCallBack)(void *parameter, + int num_threads, + pid_t *thread_pids, + va_list ap); + +/* This function gets the list of all linux threads of the current process + * passes them to the 'callback' along with the 'parameter' pointer; at the + * call back call time all the threads are paused via + * PTRACE_ATTACH. + * The callback is executed from a separate thread which shares only the + * address space, the filesystem, and the filehandles with the caller. Most + * notably, it does not share the same pid and ppid; and if it terminates, + * the rest of the application is still there. 'callback' is supposed to do + * or arrange for ResumeAllProcessThreads. This happens automatically, if + * the thread raises a synchronous signal (e.g. SIGSEGV); asynchronous + * signals are blocked. If the 'callback' decides to unblock them, it must + * ensure that they cannot terminate the application, or that + * ResumeAllProcessThreads will get called. + * It is an error for the 'callback' to make any library calls that could + * acquire locks. Most notably, this means that most system calls have to + * avoid going through libc. Also, this means that it is not legal to call + * exit() or abort(). + * We return -1 on error and the return value of 'callback' on success. + */ +int ListAllProcessThreads(void *parameter, + ListAllProcessThreadsCallBack callback, ...); + +/* This function resumes the list of all linux threads that + * ListAllProcessThreads pauses before giving to its callback. + * The function returns non-zero if at least one thread was + * suspended and has now been resumed. + */ +int ResumeAllProcessThreads(int num_threads, pid_t *thread_pids); + +#ifdef __cplusplus +} +#endif + +#endif /* _THREAD_LISTER_H */ |