* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 02111-1307, USA.
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
*/
/*
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
-#ifdef HAVE_SYS_TIMES_H
-#include <sys/times.h>
-#endif
#include <sys/types.h>
-#ifdef HAVE_SYS_WAIT_H
-#include <sys/wait.h>
-#endif
#include <time.h>
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
-#endif
+#ifdef G_OS_UNIX
+#include <unistd.h>
+#include <sys/wait.h>
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif /* HAVE_SYS_SELECT_H */
+#endif
-#include <string.h> /* for bzero on BSD systems */
+#include <string.h>
#ifdef G_OS_WIN32
# define STRICT /* Strict typing, please */
# define _WIN32_WINDOWS 0x0401 /* to get IsDebuggerPresent */
# include <windows.h>
# undef STRICT
+#else
+# include <fcntl.h>
#endif
#include "gbacktrace.h"
static void stack_trace (char **args);
#endif
-extern volatile gboolean glib_on_error_halt;
+/* People want to hit this from their debugger... */
+GLIB_AVAILABLE_IN_ALL volatile gboolean glib_on_error_halt;
volatile gboolean glib_on_error_halt = TRUE;
/**
* g_on_error_query:
- * @prg_name: the program name, needed by <command>gdb</command>
- * for the [S]tack trace option. If @prg_name is %NULL, g_get_prgname()
- * is called to get the program name (which will work correctly if
- * gdk_init() or gtk_init() has been called)
+ * @prg_name: the program name, needed by gdb for the "[S]tack trace"
+ * option. If @prg_name is %NULL, g_get_prgname() is called to get
+ * the program name (which will work correctly if gdk_init() or
+ * gtk_init() has been called)
*
* Prompts the user with
- * <computeroutput>[E]xit, [H]alt, show [S]tack trace or [P]roceed</computeroutput>.
+ * `[E]xit, [H]alt, show [S]tack trace or [P]roceed`.
* This function is intended to be used for debugging use only.
* The following example shows how it can be used together with
* the g_log() functions.
*
- * |[
- * #include <glib.h>
+ * |[<!-- language="C" -->
+ * #include <glib.h>
*
* static void
* log_handler (const gchar *log_domain,
* G_LOG_LEVEL_CRITICAL,
* log_handler,
* NULL);
- * /* ... */
+ * ...
* ]|
*
- * If [E]xit is selected, the application terminates with a call
- * to <literal>_exit(0)</literal>.
+ * If "[E]xit" is selected, the application terminates with a call
+ * to _exit(0).
*
- * If [S]tack trace is selected, g_on_error_stack_trace() is called.
- * This invokes <command>gdb</command>, which attaches to the current
- * process and shows a stack trace. The prompt is then shown again.
+ * If "[S]tack" trace is selected, g_on_error_stack_trace() is called.
+ * This invokes gdb, which attaches to the current process and shows
+ * a stack trace. The prompt is then shown again.
*
- * If [P]roceed is selected, the function returns.
+ * If "[P]roceed" is selected, the function returns.
*
* This function may cause different actions on non-UNIX platforms.
*/
/**
* g_on_error_stack_trace:
- * @prg_name: the program name, needed by <command>gdb</command>
- * for the [S]tack trace option. If @prg_name is %NULL, g_get_prgname()
- * is called to get the program name (which will work correctly if
- * gdk_init() or gtk_init() has been called)
+ * @prg_name: the program name, needed by gdb for the "[S]tack trace"
+ * option
*
- * Invokes <command>gdb</command>, which attaches to the current
- * process and shows a stack trace. Called by g_on_error_query()
- * when the [S]tack trace option is selected.
+ * Invokes gdb, which attaches to the current process and shows a
+ * stack trace. Called by g_on_error_query() when the "[S]tack trace"
+ * option is selected. You can get the current process's program name
+ * with g_get_prgname(), assuming that you have called gtk_init() or
+ * gdk_init().
*
* This function may cause different actions on non-UNIX platforms.
*/
void
g_on_error_stack_trace (const gchar *prg_name)
{
-#if defined(G_OS_UNIX) || defined(G_OS_BEOS)
+#if defined(G_OS_UNIX)
pid_t pid;
gchar buf[16];
gchar *args[4] = { "gdb", NULL, NULL, NULL };
pid = fork ();
if (pid == 0)
{
+ /* Save stderr for printing failure below */
+ int old_err = dup (2);
+ fcntl (old_err, F_SETFD, fcntl (old_err, F_GETFD) | FD_CLOEXEC);
+
close (0); dup (in_fd[0]); /* set the stdin to the in pipe */
close (1); dup (out_fd[1]); /* set the stdout to the out pipe */
close (2); dup (out_fd[1]); /* set the stderr to the out pipe */
execvp (args[0], args); /* exec gdb */
- perror ("exec failed");
+
+ /* Print failure to original stderr */
+ close (2); dup (old_err);
+ perror ("exec gdb failed");
_exit (0);
}
else if (pid == (pid_t) -1)