1 /* GLIB - Library of useful routines for C programming
2 * Copyright (C) 1995-1997 Peter Mattis, Spencer Kimball and Josh MacDonald
4 * This library is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU Library General Public
6 * License as published by the Free Software Foundation; either
7 * version 2 of the License, or (at your option) any later version.
9 * This library is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 * Library General Public License for more details.
14 * You should have received a copy of the GNU Library General Public
15 * License along with this library; if not, write to the
16 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
17 * Boston, MA 02111-1307, USA.
21 * MT safe ; except for g_on_error_stack_trace, but who wants thread safety
34 #ifdef HAVE_SYS_TIME_H
37 #ifdef HAVE_SYS_TIMES_H
38 #include <sys/times.h>
40 #include <sys/types.h>
47 #ifdef HAVE_SYS_SELECT_H
48 #include <sys/select.h>
49 #endif /* HAVE_SYS_SELECT_H */
52 #include <string.h> /* for bzero on BSD systems */
56 #include <process.h> /* For _getpid() */
60 # define SELECT_MASK fd_set
66 # define SELECT_MASK void
68 # define SELECT_MASK int
73 static void stack_trace (char **args);
75 extern volatile gboolean glib_on_error_halt;
76 volatile gboolean glib_on_error_halt = TRUE;
79 g_on_error_query (const gchar *prg_name)
81 static const gchar *query1 = "[E]xit, [H]alt";
82 static const gchar *query2 = ", show [S]tack trace";
83 static const gchar *query3 = " or [P]roceed";
87 prg_name = g_get_prgname ();
93 "%s (pid:%u): %s%s%s: ",
101 "(process:%u): %s%s: ",
107 fgets (buf, 8, stdin);
109 if ((buf[0] == 'E' || buf[0] == 'e')
112 else if ((buf[0] == 'P' || buf[0] == 'p')
116 && (buf[0] == 'S' || buf[0] == 's')
119 g_on_error_stack_trace (prg_name);
122 else if ((buf[0] == 'H' || buf[0] == 'h')
125 while (glib_on_error_halt)
127 glib_on_error_halt = TRUE;
135 g_on_error_stack_trace (const gchar *prg_name)
140 gchar *args[4] = { "gdb", NULL, NULL, NULL };
145 sprintf (buf, "%u", (guint) getpid ());
147 args[1] = (gchar*) prg_name;
156 else if (pid == (pid_t) -1)
158 perror ("unable to fork gdb");
162 while (glib_on_error_halt)
164 glib_on_error_halt = TRUE;
170 static gboolean stack_trace_done = FALSE;
173 stack_trace_sigchld (int signum)
175 stack_trace_done = TRUE;
179 stack_trace (char **args)
188 int sel, index, state;
192 stack_trace_done = FALSE;
193 signal (SIGCHLD, stack_trace_sigchld);
195 if ((pipe (in_fd) == -1) || (pipe (out_fd) == -1))
197 perror ("unable to open pipe");
204 close (0); dup (in_fd[0]); /* set the stdin to the in pipe */
205 close (1); dup (out_fd[1]); /* set the stdout to the out pipe */
206 close (2); dup (out_fd[1]); /* set the stderr to the out pipe */
208 execvp (args[0], args); /* exec gdb */
209 perror ("exec failed");
212 else if (pid == (pid_t) -1)
214 perror ("unable to fork");
219 FD_SET (out_fd[0], &fdset);
221 write (in_fd[1], "backtrace\n", 10);
222 write (in_fd[1], "p x = 0\n", 8);
223 write (in_fd[1], "quit\n", 5);
234 sel = select (FD_SETSIZE, &readset, NULL, NULL, &tv);
238 if ((sel > 0) && (FD_ISSET (out_fd[0], &readset)))
240 if (read (out_fd[0], &c, 1))
254 if ((c == '\n') || (c == '\r'))
257 fprintf (stdout, "%s", buffer);
267 else if (stack_trace_done)