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/****************************************************************************
* *
* GNAT COMPILER COMPONENTS *
* *
* T R A C E B A C K - I t a n i u m / V M S *
* *
* C Implementation File *
* *
* Copyright (C) 2007, AdaCore *
* *
* 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- *
* 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. *
* *
* 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. *
* *
* GNAT was originally developed by the GNAT team at New York University. *
* Extensive contributions were provided by Ada Core Technologies Inc. *
* *
****************************************************************************/
/* Itanium Open/VMS implementation of backtrace. Use ICB (Invocation
Context Block) routines. */
#include <stdlib.h>
#include <vms/libicb.h>
/* Declare libicb routines. */
extern INVO_CONTEXT_BLK *LIB$I64_CREATE_INVO_CONTEXT (void *(*)(size_t),
void (*)(void *),
int);
extern void LIB$I64_FREE_INVO_CONTEXT (INVO_CONTEXT_BLK *);
extern int LIB$I64_GET_CURR_INVO_CONTEXT(INVO_CONTEXT_BLK *);
extern int LIB$I64_GET_PREV_INVO_CONTEXT(INVO_CONTEXT_BLK *);
/* Gcc internal headers poison malloc. So use xmalloc() when building the
compiler. */
#ifdef IN_RTS
#define BT_MALLOC malloc
#else
#define BT_MALLOC xmalloc
#endif
int
__gnat_backtrace (void **array, int size,
void *exclude_min, void *exclude_max, int skip_frames)
{
INVO_CONTEXT_BLK *ctxt;
int res = 0;
int n = 0;
/* Create the context. */
ctxt = LIB$I64_CREATE_INVO_CONTEXT (BT_MALLOC, free, 0);
if (ctxt == NULL)
return 0;
LIB$I64_GET_CURR_INVO_CONTEXT (ctxt);
while (1)
{
void *pc = (void *)ctxt->libicb$ih_pc;
if (pc == (void *)0)
break;
if (ctxt->libicb$v_bottom_of_stack)
break;
if (n >= skip_frames && (pc < exclude_min || pc > exclude_max))
{
array[res++] = (void *)(ctxt->libicb$ih_pc);
if (res == size)
break;
}
n++;
LIB$I64_GET_PREV_INVO_CONTEXT (ctxt);
}
/* Free the context. */
LIB$I64_FREE_INVO_CONTEXT (ctxt);
return res;
}
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