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 **************************************************************************/
39 #if defined(__linux__)
40 #include <linux/limits.h> // PATH_MAX
44 #include <sys/syslimits.h> // PATH_MAX
45 #include <mach-o/dyld.h>
49 #warning PATH_MAX undefined
54 #include "os_path.hpp"
60 static pthread_mutex_t
61 mutex = PTHREAD_MUTEX_INITIALIZER;
67 pthread_mutex_lock(&mutex);
74 pthread_mutex_unlock(&mutex);
82 size_t size = PATH_MAX;
83 char *buf = path.buf(size);
85 // http://stackoverflow.com/questions/1023306/finding-current-executables-path-without-proc-self-exe
88 if (_NSGetExecutablePath(buf, &len) != 0) {
95 len = readlink("/proc/self/exe", buf, size - 1);
97 // /proc/self/exe is not available on setuid processes, so fallback to
98 // /proc/self/cmdline.
99 int fd = open("/proc/self/cmdline", O_RDONLY);
101 len = read(fd, buf, size - 1);
106 snprintf(buf, size, "%i", (int)getpid());
119 size_t size = PATH_MAX;
120 char *buf = path.buf(size);
130 log(const char *format, ...)
133 va_start(ap, format);
135 vfprintf(stderr, format, ap);
143 gettimeofday(&tv, NULL);
144 return tv.tv_usec + tv.tv_sec*1000000LL;
154 static void (*gCallback)(void) = NULL;
156 #define NUM_SIGNALS 16
158 struct sigaction old_actions[NUM_SIGNALS];
163 * - http://sourceware.org/git/?p=glibc.git;a=blob;f=debug/segfault.c
164 * - http://ggi.cvs.sourceforge.net/viewvc/ggi/ggi-core/libgg/gg/cleanup.c?view=markup
167 signalHandler(int sig, siginfo_t *info, void *context)
169 static int recursion_count = 0;
171 fprintf(stderr, "apitrace: warning: caught signal %i\n", sig);
173 if (recursion_count) {
174 fprintf(stderr, "apitrace: warning: recursion handling signal %i\n", sig);
183 struct sigaction *old_action;
184 if (sig >= NUM_SIGNALS) {
185 /* This should never happen */
186 fprintf(stderr, "error: unexpected signal %i\n", sig);
189 old_action = &old_actions[sig];
191 if (old_action->sa_flags & SA_SIGINFO) {
192 // Handler is in sa_sigaction
193 old_action->sa_sigaction(sig, info, context);
195 if (old_action->sa_handler == SIG_DFL) {
196 fprintf(stderr, "apitrace: info: taking default action for signal %i\n", sig);
199 struct sigaction dfl_action;
200 dfl_action.sa_handler = SIG_DFL;
201 sigemptyset (&dfl_action.sa_mask);
202 dfl_action.sa_flags = 0;
203 sigaction(sig, &dfl_action, NULL);
209 } else if (old_action->sa_handler == SIG_IGN) {
212 /* dispatch to handler */
213 old_action->sa_handler(sig);
219 setExceptionCallback(void (*callback)(void))
223 gCallback = callback;
225 struct sigaction new_action;
226 new_action.sa_sigaction = signalHandler;
227 sigemptyset(&new_action.sa_mask);
228 new_action.sa_flags = SA_SIGINFO | SA_RESTART;
231 for (int sig = 1; sig < NUM_SIGNALS; ++sig) {
232 // SIGKILL and SIGSTOP can't be handled
233 if (sig != SIGKILL && sig != SIGSTOP) {
234 if (sigaction(sig, NULL, &old_actions[sig]) >= 0) {
235 sigaction(sig, &new_action, NULL);
243 resetExceptionCallback(void)