2 * This file is part of ltrace.
3 * Copyright (C) 2011,2012,2013 Petr Machata, Red Hat Inc.
4 * Copyright (C) 2009 Juan Cespedes
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation; either version 2 of the
9 * License, or (at your option) any later version.
11 * This program is distributed in the hope that it will be useful, but
12 * WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
25 #include <sys/param.h>
36 #include "read_config_file.h"
38 #include "prototype.h"
42 int exiting = 0; /* =1 if a SIGINT or SIGTERM has been received */
44 static enum callback_status
45 stop_non_p_processes(struct process *proc, void *data)
50 for (it = opt_p; it != NULL; it = it->next) {
51 struct process *p_proc = pid2proc(it->pid);
53 printf("stop_non_p_processes: %d terminated?\n", it->pid);
56 if (p_proc == proc || p_proc->leader == proc->leader) {
63 debug(2, "Sending SIGSTOP to process %u", proc->pid);
64 kill(proc->pid, SIGSTOP);
71 signal_alarm(int sig) {
72 signal(SIGALRM, SIG_DFL);
73 each_process(NULL, &stop_non_p_processes, NULL);
82 exiting = 1 + !!os_ltrace_exiting_sighandler();
84 signal(SIGINT, SIG_IGN);
85 signal(SIGTERM, SIG_IGN);
86 signal(SIGALRM, signal_alarm);
96 fclose(options.output);
97 options.output = NULL;
102 ltrace_init(int argc, char **argv) {
103 struct opt_p_t *opt_p_tmp;
106 signal(SIGINT, signal_exit); /* Detach processes when interrupted */
107 signal(SIGTERM, signal_exit); /* ... or killed */
109 argv = process_options(argc, argv);
110 init_global_config();
113 /* Check that the binary ABI is supported before
114 * calling execute_program. */
116 ltelf_init(<e, command);
119 pid_t pid = execute_program(command, argv);
120 struct process *proc = open_program(command, pid);
122 fprintf(stderr, "couldn't open program '%s': %s\n",
123 command, strerror(errno));
127 trace_set_options(proc);
128 continue_process(pid);
132 open_pid(opt_p_tmp->pid);
133 opt_p_tmp = opt_p_tmp->next;
137 static int num_ltrace_callbacks[EVENT_MAX];
138 static callback_func * ltrace_callbacks[EVENT_MAX];
141 ltrace_add_callback(callback_func func, Event_type type) {
142 ltrace_callbacks[type] = realloc(ltrace_callbacks[type], (num_ltrace_callbacks[type]+1)*sizeof(callback_func));
143 ltrace_callbacks[type][num_ltrace_callbacks[type]++] = func;
147 dispatch_callbacks(Event * ev) {
149 /* Ignoring case 1: signal into a dying tracer */
150 if (ev->type==EVENT_SIGNAL &&
151 exiting && ev->e_un.signum == SIGSTOP) {
154 /* Ignoring case 2: process being born before a clone event */
155 if (ev->proc && ev->proc->state == STATE_IGNORED) {
158 for (i=0; i<num_ltrace_callbacks[ev->type]; i++) {
159 ltrace_callbacks[ev->type][i](ev);
168 dispatch_callbacks(ev);