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_string.hpp"
64 size_t size = PATH_MAX;
65 char *buf = path.buf(size);
67 // http://stackoverflow.com/questions/1023306/finding-current-executables-path-without-proc-self-exe
70 if (_NSGetExecutablePath(buf, &len) != 0) {
77 len = readlink("/proc/self/exe", buf, size - 1);
79 // /proc/self/exe is not available on setuid processes, so fallback to
80 // /proc/self/cmdline.
81 int fd = open("/proc/self/cmdline", O_RDONLY);
83 len = read(fd, buf, size - 1);
88 snprintf(buf, size, "%i", (int)getpid());
101 size_t size = PATH_MAX;
102 char *buf = path.buf(size);
112 String::exists(void) const
117 err = stat(str(), &st);
122 if (!S_ISREG(st.st_mode))
128 int execute(char * const * args)
133 execvp(args[0], args);
134 fprintf(stderr, "error: failed to execute %s\n", args[0]);
139 fprintf(stderr, "error: failed to fork\n");
143 waitpid(pid, &status, 0);
149 log(const char *format, ...)
152 va_start(ap, format);
154 vfprintf(stderr, format, ap);
162 gettimeofday(&tv, NULL);
163 return tv.tv_usec + tv.tv_sec*1000000LL;
173 static void (*gCallback)(void) = NULL;
175 #define NUM_SIGNALS 16
177 struct sigaction old_actions[NUM_SIGNALS];
182 * - http://sourceware.org/git/?p=glibc.git;a=blob;f=debug/segfault.c
183 * - http://ggi.cvs.sourceforge.net/viewvc/ggi/ggi-core/libgg/gg/cleanup.c?view=markup
186 signalHandler(int sig, siginfo_t *info, void *context)
188 static int recursion_count = 0;
190 fprintf(stderr, "apitrace: warning: caught signal %i\n", sig);
192 if (recursion_count) {
193 fprintf(stderr, "apitrace: warning: recursion handling signal %i\n", sig);
202 struct sigaction *old_action;
203 if (sig >= NUM_SIGNALS) {
204 /* This should never happen */
205 fprintf(stderr, "error: unexpected signal %i\n", sig);
208 old_action = &old_actions[sig];
210 if (old_action->sa_flags & SA_SIGINFO) {
211 // Handler is in sa_sigaction
212 old_action->sa_sigaction(sig, info, context);
214 if (old_action->sa_handler == SIG_DFL) {
215 fprintf(stderr, "apitrace: info: taking default action for signal %i\n", sig);
218 struct sigaction dfl_action;
219 dfl_action.sa_handler = SIG_DFL;
220 sigemptyset (&dfl_action.sa_mask);
221 dfl_action.sa_flags = 0;
222 sigaction(sig, &dfl_action, NULL);
228 } else if (old_action->sa_handler == SIG_IGN) {
231 /* dispatch to handler */
232 old_action->sa_handler(sig);
238 setExceptionCallback(void (*callback)(void))
242 gCallback = callback;
244 struct sigaction new_action;
245 new_action.sa_sigaction = signalHandler;
246 sigemptyset(&new_action.sa_mask);
247 new_action.sa_flags = SA_SIGINFO | SA_RESTART;
250 for (int sig = 1; sig < NUM_SIGNALS; ++sig) {
251 // SIGKILL and SIGSTOP can't be handled
252 if (sig != SIGKILL && sig != SIGSTOP) {
253 if (sigaction(sig, NULL, &old_actions[sig]) >= 0) {
254 sigaction(sig, &new_action, NULL);
262 resetExceptionCallback(void)