1 /* Copyright (c) 2005-2007, Google Inc. 2 * All rights reserved. 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above 11 * copyright notice, this list of conditions and the following disclaimer 12 * in the documentation and/or other materials provided with the 13 * distribution. 14 * * Neither the name of Google Inc. nor the names of its 15 * contributors may be used to endorse or promote products derived from 16 * this software without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 29 * 30 * --- 31 * Author: Markus Gutschke 32 */ 33 34 #ifndef _THREAD_LISTER_H 35 #define _THREAD_LISTER_H 36 37 #include <stdarg.h> 38 #include <sys/types.h> 39 40 #ifdef __cplusplus 41 extern "C" { 42 #endif 43 44 typedef int (*ListAllProcessThreadsCallBack)(void *parameter, 45 int num_threads, 46 pid_t *thread_pids, 47 va_list ap); 48 49 /* This function gets the list of all linux threads of the current process 50 * passes them to the 'callback' along with the 'parameter' pointer; at the 51 * call back call time all the threads are paused via 52 * PTRACE_ATTACH. 53 * The callback is executed from a separate thread which shares only the 54 * address space, the filesystem, and the filehandles with the caller. Most 55 * notably, it does not share the same pid and ppid; and if it terminates, 56 * the rest of the application is still there. 'callback' is supposed to do 57 * or arrange for ResumeAllProcessThreads. This happens automatically, if 58 * the thread raises a synchronous signal (e.g. SIGSEGV); asynchronous 59 * signals are blocked. If the 'callback' decides to unblock them, it must 60 * ensure that they cannot terminate the application, or that 61 * ResumeAllProcessThreads will get called. 62 * It is an error for the 'callback' to make any library calls that could 63 * acquire locks. Most notably, this means that most system calls have to 64 * avoid going through libc. Also, this means that it is not legal to call 65 * exit() or abort(). 66 * We return -1 on error and the return value of 'callback' on success. 67 */ 68 int ListAllProcessThreads(void *parameter, 69 ListAllProcessThreadsCallBack callback, ...); 70 71 /* This function resumes the list of all linux threads that 72 * ListAllProcessThreads pauses before giving to its callback. 73 * The function returns non-zero if at least one thread was 74 * suspended and has now been resumed. 75 */ 76 int ResumeAllProcessThreads(int num_threads, pid_t *thread_pids); 77 78 #ifdef __cplusplus 79 } 80 #endif 81 82 #endif /* _THREAD_LISTER_H */ 83
