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 Lesser 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 * Lesser General Public License for more details.
14 * You should have received a copy of the GNU Lesser 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 * Modified by the GLib Team and others 1997-2000. See the AUTHORS
22 * file for a list of people on the GLib Team. See the ChangeLog
23 * files for a list of changes. These files are distributed with
24 * GLib at ftp://ftp.gtk.org/pub/gtk/.
28 * MT safe ; except for g_on_error_stack_trace, but who wants thread safety
33 #include "glibconfig.h"
40 #ifdef HAVE_SYS_TIME_H
43 #ifdef HAVE_SYS_TIMES_H
44 #include <sys/times.h>
46 #include <sys/types.h>
47 #ifdef HAVE_SYS_WAIT_H
56 #ifdef HAVE_SYS_SELECT_H
57 #include <sys/select.h>
58 #endif /* HAVE_SYS_SELECT_H */
60 #include <string.h> /* for bzero on BSD systems */
63 # define STRICT /* Strict typing, please */
64 # define _WIN32_WINDOWS 0x0401 /* to get IsDebuggerPresent */
69 #include "gbacktrace.h"
73 #include "gprintfint.h"
77 # define SELECT_MASK fd_set
80 # define SELECT_MASK void
82 # define SELECT_MASK int
88 static void stack_trace (char **args);
91 extern volatile gboolean glib_on_error_halt;
92 volatile gboolean glib_on_error_halt = TRUE;
95 g_on_error_query (const gchar *prg_name)
98 static const gchar * const query1 = "[E]xit, [H]alt";
99 static const gchar * const query2 = ", show [S]tack trace";
100 static const gchar * const query3 = " or [P]roceed";
104 prg_name = g_get_prgname ();
110 "%s (pid:%u): %s%s%s: ",
118 "(process:%u): %s%s: ",
124 if (isatty(0) && isatty(1))
125 fgets (buf, 8, stdin);
129 if ((buf[0] == 'E' || buf[0] == 'e')
132 else if ((buf[0] == 'P' || buf[0] == 'p')
136 && (buf[0] == 'S' || buf[0] == 's')
139 g_on_error_stack_trace (prg_name);
142 else if ((buf[0] == 'H' || buf[0] == 'h')
145 while (glib_on_error_halt)
147 glib_on_error_halt = TRUE;
154 prg_name = g_get_prgname ();
156 MessageBox (NULL, "g_on_error_query called, program terminating",
157 (prg_name && *prg_name) ? prg_name : NULL,
164 g_on_error_stack_trace (const gchar *prg_name)
166 #if defined(G_OS_UNIX) || defined(G_OS_BEOS)
169 gchar *args[4] = { "gdb", NULL, NULL, NULL };
175 _g_sprintf (buf, "%u", (guint) getpid ());
177 args[1] = (gchar*) prg_name;
186 else if (pid == (pid_t) -1)
188 perror ("unable to fork gdb");
192 waitpid (pid, &status, 0);
194 if (IsDebuggerPresent ())
203 static gboolean stack_trace_done = FALSE;
206 stack_trace_sigchld (int signum)
208 stack_trace_done = TRUE;
212 stack_trace (char **args)
224 stack_trace_done = FALSE;
225 signal (SIGCHLD, stack_trace_sigchld);
227 if ((pipe (in_fd) == -1) || (pipe (out_fd) == -1))
229 perror ("unable to open pipe");
236 close (0); dup (in_fd[0]); /* set the stdin to the in pipe */
237 close (1); dup (out_fd[1]); /* set the stdout to the out pipe */
238 close (2); dup (out_fd[1]); /* set the stderr to the out pipe */
240 execvp (args[0], args); /* exec gdb */
241 perror ("exec failed");
244 else if (pid == (pid_t) -1)
246 perror ("unable to fork");
251 FD_SET (out_fd[0], &fdset);
253 write (in_fd[1], "backtrace\n", 10);
254 write (in_fd[1], "p x = 0\n", 8);
255 write (in_fd[1], "quit\n", 5);
266 sel = select (FD_SETSIZE, &readset, NULL, NULL, &tv);
270 if ((sel > 0) && (FD_ISSET (out_fd[0], &readset)))
272 if (read (out_fd[0], &c, 1))
286 if ((c == '\n') || (c == '\r'))
289 _g_fprintf (stdout, "%s", buffer);
299 else if (stack_trace_done)
310 #endif /* !G_OS_WIN32 */