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| author | Francois-Xavier Coudert <fxcoudert@gcc.gnu.org> | 2007-08-11 21:52:22 +0000 |
|---|---|---|
| committer | François-Xavier Coudert <fxcoudert@gcc.gnu.org> | 2007-08-11 21:52:22 +0000 |
| commit | 2b840e50679f5b3208241746984cd2f195785f02 (patch) | |
| tree | 60e7b5dcde1b34e0269164273f272c579b14a633 /libgfortran/runtime | |
| parent | c9ff1de3ae81dc074cac1fcf12292d38f1224b33 (diff) | |
| download | gcc-2b840e50679f5b3208241746984cd2f195785f02.zip gcc-2b840e50679f5b3208241746984cd2f195785f02.tar.gz gcc-2b840e50679f5b3208241746984cd2f195785f02.tar.bz2 | |
re PR fortran/31189 (Support backtracing for non-library errors)
PR fortran/31189
* runtime/backtrace.c (show_backtrace): Skip _gfortrani_handler
when displaying backtrace.
* runtime/compile_options.c: Include <signal.h>.
(handler): New function.
(set_options): Set signal handlers for backtrace.
* libgfortran.h (handler): Add prototype.
* invoke.texi (-fbacktrace): Document the new behaviour.
Co-Authored-By: Tobias Burnus <burnus@gcc.gnu.org>
From-SVN: r127364
Diffstat (limited to 'libgfortran/runtime')
| -rw-r--r-- | libgfortran/runtime/backtrace.c | 3 | ||||
| -rw-r--r-- | libgfortran/runtime/compile_options.c | 76 |
2 files changed, 78 insertions, 1 deletions
diff --git a/libgfortran/runtime/backtrace.c b/libgfortran/runtime/backtrace.c index 684ac00..e969341 100644 --- a/libgfortran/runtime/backtrace.c +++ b/libgfortran/runtime/backtrace.c @@ -223,7 +223,8 @@ show_backtrace (void) /* Try to recognize the internal libgfortran functions. */ if (strncasecmp (func, "*_gfortran", 10) == 0 || strncasecmp (func, "_gfortran", 9) == 0 - || strcmp (func, "main") == 0 || strcmp (func, "_start") == 0) + || strcmp (func, "main") == 0 || strcmp (func, "_start") == 0 + || strcmp (func, "_gfortrani_handler") == 0) continue; if (local_strcasestr (str[i], "libgfortran.so") != NULL diff --git a/libgfortran/runtime/compile_options.c b/libgfortran/runtime/compile_options.c index a6e2a42..c05b400 100644 --- a/libgfortran/runtime/compile_options.c +++ b/libgfortran/runtime/compile_options.c @@ -31,10 +31,61 @@ Boston, MA 02110-1301, USA. */ #include "libgfortran.h" +#ifdef HAVE_SIGNAL_H +#include <signal.h> +#endif + /* Useful compile-time options will be stored in here. */ compile_options_t compile_options; + +/* A signal handler to allow us to output a backtrace. */ +void +handler (int signum) +{ + const char * name = NULL, * desc = NULL; + + switch (signum) + { +#if defined(SIGSEGV) + case SIGSEGV: + name = "SIGSEGV"; + desc = "Segmentation fault"; + break; +#endif + +#if defined(SIGBUS) + case SIGBUS: + name = "SIGBUS"; + desc = "Bus error"; + break; +#endif + +#if defined(SIGILL) + case SIGILL: + name = "SIGILL"; + desc = "Illegal instruction"; + break; +#endif + +#if defined(SIGFPE) + case SIGFPE: + name = "SIGFPE"; + desc = "Floating-point exception"; + break; +#endif + } + + if (name) + st_printf ("\nProgram received signal %d (%s): %s.\n", signum, name, desc); + else + st_printf ("\nProgram received signal %d.\n", signum); + + sys_exit (5); +} + + /* Set the usual compile-time options. */ extern void set_options (int , int []); export_proto(set_options); @@ -56,6 +107,31 @@ set_options (int num, int options[]) compile_options.sign_zero = options[5]; if (num >= 7) compile_options.bounds_check = options[6]; + + /* If backtrace is required, we set signal handlers on most common + signals. */ +#if defined(HAVE_SIGNAL_H) && (defined(SIGSEGV) || defined(SIGBUS) \ + || defined(SIGILL) || defined(SIGFPE)) + if (compile_options.backtrace) + { +#if defined(SIGSEGV) + signal (SIGSEGV, handler); +#endif + +#if defined(SIGBUS) + signal (SIGBUS, handler); +#endif + +#if defined(SIGILL) + signal (SIGILL, handler); +#endif + +#if defined(SIGFPE) + signal (SIGFPE, handler); +#endif + } +#endif + } |