/****************************************************************************
* *
- * GNAT COMPILER COMPONENTS *
+ * GNAT RUN-TIME COMPONENTS *
* *
* T R A C E B A C K - G C C t a b l e s *
* *
* C Implementation File *
* *
- * Copyright (C) 2004 Ada Core Technologies, Inc *
+ * Copyright (C) 2004-2011, Free Software Foundation, Inc. *
* *
* GNAT is free software; you can redistribute it and/or modify it under *
* terms of the GNU General Public License as published by the Free Soft- *
- * ware Foundation; either version 2, or (at your option) any later ver- *
+ * ware Foundation; either version 3, or (at your option) any later ver- *
* sion. GNAT is distributed in the hope that it will be useful, but WITH- *
* OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY *
- * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License *
- * for more details. You should have received a copy of the GNU General *
- * Public License distributed with GNAT; see file COPYING. If not, write *
- * to the Free Software Foundation, 51 Franklin Street, Fifth Floor, *
- * Boston, MA 02110-1301, USA. *
+ * or FITNESS FOR A PARTICULAR PURPOSE. *
* *
- * As a special exception, if you link this file with other files to *
- * produce an executable, this file does not by itself cause the resulting *
- * executable to be covered by the GNU General Public License. This except- *
- * ion does not however invalidate any other reasons why the executable *
- * file might be covered by the GNU Public License. *
+ * As a special exception under Section 7 of GPL version 3, you are granted *
+ * additional permissions described in the GCC Runtime Library Exception, *
+ * version 3.1, as published by the Free Software Foundation. *
+ * *
+ * You should have received a copy of the GNU General Public License and *
+ * a copy of the GCC Runtime Library Exception along with this program; *
+ * see the files COPYING3 and COPYING.RUNTIME respectively. If not, see *
+ * <http://www.gnu.org/licenses/>. *
* *
* GNAT was originally developed by the GNAT team at New York University. *
* Extensive contributions were provided by Ada Core Technologies Inc. *
#include <unwind.h>
/* The implementation boils down to a call to _Unwind_Backtrace with a
- tailored callback and carried-on datastructure to keep track of the
+ tailored callback and carried-on data structure to keep track of the
input parameters we got as well as of the basic processing state. */
+/******************
+ * trace_callback *
+ ******************/
+
+#if !defined (__USING_SJLJ_EXCEPTIONS__)
+
typedef struct {
void ** traceback;
int max_len;
int n_entries_filled;
} uw_data_t;
-/******************
- * trace_callback *
- ******************/
+#if defined (__ia64__) && defined (__hpux__)
+#include <uwx.h>
+#endif
static _Unwind_Reason_Code
trace_callback (struct _Unwind_Context * uw_context, uw_data_t * uw_data)
{
- void * pc = (void *) _Unwind_GetIP (uw_context);
+ char * pc;
+
+#if defined (__ia64__) && defined (__hpux__)
+ /* Work around problem with _Unwind_GetIP on ia64 HP-UX. */
+ uwx_get_reg ((struct uwx_env *) uw_context, UWX_REG_IP, (uint64_t *) &pc);
+#else
+ pc = (char *) _Unwind_GetIP (uw_context);
+#endif
if (uw_data->n_frames_skipped < uw_data->n_frames_to_skip)
{
if (uw_data->n_entries_filled >= uw_data->max_len)
return _URC_NORMAL_STOP;
- if (pc < uw_data->exclude_min || pc > uw_data->exclude_max)
+ if (pc < (char *)uw_data->exclude_min || pc > (char *)uw_data->exclude_max)
uw_data->traceback [uw_data->n_entries_filled ++] = pc + PC_ADJUST;
return _URC_NO_REASON;
}
+#endif
+
/********************
* __gnat_backtrace *
********************/
int
-__gnat_backtrace (void ** traceback, int max_len,
- void * exclude_min, void * exclude_max,
- int skip_frames)
+__gnat_backtrace (void ** traceback __attribute__((unused)),
+ int max_len __attribute__((unused)),
+ void * exclude_min __attribute__((unused)),
+ void * exclude_max __attribute__((unused)),
+ int skip_frames __attribute__((unused)))
{
+#if defined (__USING_SJLJ_EXCEPTIONS__)
+ /* We have no unwind material (tables) at hand with sjlj eh, and no
+ way to retrieve complete and accurate call chain information from
+ the context stack we maintain. */
+ return 0;
+#else
uw_data_t uw_data;
/* State carried over during the whole unwinding process. */
_Unwind_Backtrace ((_Unwind_Trace_Fn)trace_callback, &uw_data);
return uw_data.n_entries_filled;
+#endif
}
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