#include <assert.h>
#include <string.h>
#include <errno.h>
-
-#ifdef HAVE_SIGNAL_H
#include <signal.h>
-#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
-#ifdef HAVE_STDLIB_H
#include <stdlib.h>
-#endif
#ifdef HAVE_SYS_TIME_H
#include <sys/time.h>
#endif
-/* sys_exit()-- Terminate the program with an exit code. */
+/* Termination of a program: F2008 2.3.5 talks about "normal
+ termination" and "error termination". Normal termination occurs as
+ a result of e.g. executing the end program statement, and executing
+ the STOP statement. It includes the effect of the C exit()
+ function.
-void
-sys_exit (int code)
-{
- /* Show error backtrace if possible. */
- if (code != 0 && code != 4
- && (options.backtrace == 1
- || (options.backtrace == -1 && compile_options.backtrace == 1)))
- show_backtrace ();
-
- /* Dump core if requested. */
- if (code != 0
- && (options.dump_core == 1
- || (options.dump_core == -1 && compile_options.dump_core == 1)))
- {
-#if defined(HAVE_GETRLIMIT) && defined(RLIMIT_CORE)
- /* Warn if a core file cannot be produced because
- of core size limit. */
+ Error termination is initiated when the ERROR STOP statement is
+ executed, when ALLOCATE/DEALLOCATE fails without STAT= being
+ specified, when some of the co-array synchronization statements
+ fail without STAT= being specified, and some I/O errors if
+ ERR/IOSTAT/END/EOR is not present, and finally EXECUTE_COMMAND_LINE
+ failure without CMDSTAT=.
- struct rlimit core_limit;
+ 2.3.5 also explains how co-images synchronize during termination.
- if (getrlimit (RLIMIT_CORE, &core_limit) == 0 && core_limit.rlim_cur == 0)
- estr_write ("** Warning: a core dump was requested, but the core size"
- "limit\n** is currently zero.\n\n");
-#endif
-
-
-#if defined(HAVE_KILL) && defined(HAVE_GETPID) && defined(SIGQUIT)
- kill (getpid (), SIGQUIT);
-#else
- estr_write ("Core dump not possible, sorry.");
-#endif
- }
-
- exit (code);
-}
+ In libgfortran we have two ways of ending a program. exit(code) is
+ a normal exit; calling exit() also causes open units to be
+ closed. No backtrace or core dump is needed here. When something
+ goes wrong, we have sys_abort() which tries to print the backtrace
+ if -fbacktrace is enabled, and then dumps core; whether a core file
+ is generated is system dependent. When aborting, we don't flush and
+ close open units, as program memory might be corrupted and we'd
+ rather risk losing dirty data in the buffers rather than corrupting
+ files on disk.
+*/
/* Error conditions. The tricky part here is printing a message when
* it is the I/O subsystem that is severely wounded. Our goal is to
* 1 Terminated because of operating system error.
* 2 Error in the runtime library
* 3 Internal error in runtime library
- * 4 Error during error processing (very bad)
*
* Other error returns are reserved for the STOP statement with a numeric code.
*/
#define ERROR_MESSAGE "Internal error: buffer overrun in st_vprintf()\n"
write (STDERR_FILENO, buffer, ST_VPRINTF_SIZE - 1);
write (STDERR_FILENO, ERROR_MESSAGE, strlen(ERROR_MESSAGE));
- sys_exit(2);
+ sys_abort ();
#undef ERROR_MESSAGE
}
}
+/* sys_abort()-- Terminate the program showing backtrace and dumping
+ core. */
+
+void
+sys_abort (void)
+{
+ /* If backtracing is enabled, print backtrace and disable signal
+ handler for ABRT. */
+ if (options.backtrace == 1
+ || (options.backtrace == -1 && compile_options.backtrace == 1))
+ {
+ show_backtrace ();
+ signal (SIGABRT, SIG_DFL);
+ }
+
+ abort();
+}
+
+
/* gfc_xtoa()-- Integer to hexadecimal conversion. */
const char *
size_t buflen __attribute__((unused)))
{
#ifdef HAVE_STRERROR_R
- /* TODO: How to prevent the compiler warning due to strerror_r of
- the untaken branch having the wrong return type? */
- if (__builtin_classify_type (strerror_r (0, buf, 0)) == 5)
- {
- /* GNU strerror_r() */
- return strerror_r (errnum, buf, buflen);
- }
- else
- {
- /* POSIX strerror_r () */
- strerror_r (errnum, buf, buflen);
- return buf;
- }
+ return
+ __builtin_choose_expr (__builtin_classify_type (strerror_r (0, buf, 0))
+ == 5,
+ /* GNU strerror_r() */
+ strerror_r (errnum, buf, buflen),
+ /* POSIX strerror_r () */
+ (strerror_r (errnum, buf, buflen), buf));
#else
/* strerror () is not necessarily thread-safe, but should at least
be available everywhere. */
/* Don't even try to print something at this point */
if (magic == MAGIC)
- sys_exit (4);
+ sys_abort ();
magic = MAGIC;
}
estr_write ("\n");
estr_write (message);
estr_write ("\n");
- sys_exit (1);
+ exit (1);
}
iexport(os_error);
st_vprintf (message, ap);
va_end (ap);
estr_write ("\n");
- sys_exit (2);
+ exit (2);
}
iexport(runtime_error);
st_vprintf (message, ap);
va_end (ap);
estr_write ("\n");
- sys_exit (2);
+ exit (2);
}
iexport(runtime_error_at);
because hopefully it doesn't happen too often). */
stupid_function_name_for_static_linking();
- sys_exit (3);
+ exit (3);
}
estr_write ("Fortran runtime error: ");
estr_write (message);
estr_write ("\n");
- sys_exit (2);
+ exit (2);
}
iexport(generate_error);
estr_write ("Fortran runtime error: ");
estr_write (message);
estr_write ("\n");
- sys_exit (2);
+ exit (2);
}
else
{
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