1 /**************************************************************************
3 * Copyright 2010-2011 VMware, Inc.
6 * Permission is hereby granted, free of charge, to any person obtaining a copy
7 * of this software and associated documentation files (the "Software"), to deal
8 * in the Software without restriction, including without limitation the rights
9 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
10 * copies of the Software, and to permit persons to whom the Software is
11 * furnished to do so, subject to the following conditions:
13 * The above copyright notice and this permission notice shall be included in
14 * all copies or substantial portions of the Software.
16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
18 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
19 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
20 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
21 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
24 **************************************************************************/
40 #include <mach-o/dyld.h>
49 static pthread_mutex_t
50 mutex = PTHREAD_MUTEX_INITIALIZER;
56 pthread_mutex_lock(&mutex);
63 pthread_mutex_unlock(&mutex);
72 char *szProcessPath = path.buf(PATH_MAX);
74 // http://stackoverflow.com/questions/1023306/finding-current-executables-path-without-proc-self-exe
76 uint32_t len = PATH_MAX;
77 if (_NSGetExecutablePath(szProcessPath, &len) != 0) {
83 len = readlink("/proc/self/exe", szProcessPath, PATH_MAX - 1);
85 // /proc/self/exe is not available on setuid processes, so fallback to
86 // /proc/self/cmdline.
87 int fd = open("/proc/self/cmdline", O_RDONLY);
89 len = read(fd, szProcessPath, PATH_MAX - 1);
94 snprintf(szProcessPath, PATH_MAX, "%i", (int)getpid());
107 size_t size = PATH_MAX;
108 char *str = path.buf(size);
116 log(const char *format, ...)
119 va_start(ap, format);
121 vfprintf(stderr, format, ap);
129 gettimeofday(&tv, NULL);
130 return tv.tv_usec + tv.tv_sec*1000000LL;
140 static void (*gCallback)(void) = NULL;
142 #define NUM_SIGNALS 16
144 struct sigaction old_actions[NUM_SIGNALS];
149 * - http://sourceware.org/git/?p=glibc.git;a=blob;f=debug/segfault.c
150 * - http://ggi.cvs.sourceforge.net/viewvc/ggi/ggi-core/libgg/gg/cleanup.c?view=markup
153 signalHandler(int sig, siginfo_t *info, void *context)
155 static int recursion_count = 0;
157 fprintf(stderr, "apitrace: warning: caught signal %i\n", sig);
159 if (recursion_count) {
160 fprintf(stderr, "apitrace: warning: recursion handling signal %i\n", sig);
169 struct sigaction *old_action;
170 if (sig >= NUM_SIGNALS) {
171 /* This should never happen */
172 fprintf(stderr, "error: unexpected signal %i\n", sig);
175 old_action = &old_actions[sig];
177 if (old_action->sa_flags & SA_SIGINFO) {
178 // Handler is in sa_sigaction
179 old_action->sa_sigaction(sig, info, context);
181 if (old_action->sa_handler == SIG_DFL) {
182 fprintf(stderr, "apitrace: info: taking default action for signal %i\n", sig);
185 struct sigaction dfl_action;
186 dfl_action.sa_handler = SIG_DFL;
187 sigemptyset (&dfl_action.sa_mask);
188 dfl_action.sa_flags = 0;
189 sigaction(sig, &dfl_action, NULL);
195 } else if (old_action->sa_handler == SIG_IGN) {
198 /* dispatch to handler */
199 old_action->sa_handler(sig);
205 setExceptionCallback(void (*callback)(void))
209 gCallback = callback;
211 struct sigaction new_action;
212 new_action.sa_sigaction = signalHandler;
213 sigemptyset(&new_action.sa_mask);
214 new_action.sa_flags = SA_SIGINFO | SA_RESTART;
217 for (int sig = 1; sig < NUM_SIGNALS; ++sig) {
218 // SIGKILL and SIGSTOP can't be handled
219 if (sig != SIGKILL && sig != SIGSTOP) {
220 if (sigaction(sig, NULL, &old_actions[sig]) >= 0) {
221 sigaction(sig, &new_action, NULL);
229 resetExceptionCallback(void)