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jeremybenn |
/****************************************************************************
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* *
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* GNAT RUN-TIME COMPONENTS *
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* *
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* T R A C E B A C K - I t a n i u m / V M S *
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* *
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* C Implementation File *
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* *
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* Copyright (C) 2007-2011, AdaCore *
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* *
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* GNAT is free software; you can redistribute it and/or modify it under *
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* terms of the GNU General Public License as published by the Free Soft- *
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* ware Foundation; either version 3, or (at your option) any later ver- *
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* sion. GNAT is distributed in the hope that it will be useful, but WITH- *
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* OUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY *
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* or FITNESS FOR A PARTICULAR PURPOSE. *
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* *
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* As a special exception under Section 7 of GPL version 3, you are granted *
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* additional permissions described in the GCC Runtime Library Exception, *
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* version 3.1, as published by the Free Software Foundation. *
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* *
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* You should have received a copy of the GNU General Public License and *
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* a copy of the GCC Runtime Library Exception along with this program; *
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* see the files COPYING3 and COPYING.RUNTIME respectively. If not, see *
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* <http://www.gnu.org/licenses/>. *
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* *
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* GNAT was originally developed by the GNAT team at New York University. *
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* Extensive contributions were provided by Ada Core Technologies Inc. *
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* *
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****************************************************************************/
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/* Itanium Open/VMS implementation of backtrace. Use ICB (Invocation
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Context Block) routines. */
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#include <stdlib.h>
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#include <vms/libicb.h>
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/* Declare libicb routines. */
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extern INVO_CONTEXT_BLK *LIB$I64_CREATE_INVO_CONTEXT (void *(*)(size_t),
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void (*)(void *),
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int);
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extern void LIB$I64_FREE_INVO_CONTEXT (INVO_CONTEXT_BLK *);
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extern int LIB$I64_GET_CURR_INVO_CONTEXT(INVO_CONTEXT_BLK *);
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extern int LIB$I64_GET_PREV_INVO_CONTEXT(INVO_CONTEXT_BLK *);
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/* Gcc internal headers poison malloc. So use xmalloc() when building the
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compiler. */
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#ifdef IN_RTS
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#define BT_MALLOC malloc
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#else
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#define BT_MALLOC xmalloc
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#endif
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int
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__gnat_backtrace (void **array, int size,
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void *exclude_min, void *exclude_max, int skip_frames)
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{
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INVO_CONTEXT_BLK *ctxt;
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int res = 0;
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int n = 0;
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/* Create the context. */
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ctxt = LIB$I64_CREATE_INVO_CONTEXT (BT_MALLOC, free, 0);
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if (ctxt == NULL)
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return 0;
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LIB$I64_GET_CURR_INVO_CONTEXT (ctxt);
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while (1)
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{
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void *pc = (void *)ctxt->libicb$ih_pc;
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if (pc == (void *)0)
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break;
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if (ctxt->libicb$v_bottom_of_stack)
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break;
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if (n >= skip_frames && (pc < exclude_min || pc > exclude_max))
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{
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array[res++] = (void *)(ctxt->libicb$ih_pc);
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if (res == size)
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break;
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}
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n++;
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LIB$I64_GET_PREV_INVO_CONTEXT (ctxt);
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}
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/* Free the context. */
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LIB$I64_FREE_INVO_CONTEXT (ctxt);
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return res;
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}
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