b3c336413b
2011-10-24 Robert Dewar <dewar@adacore.com> * sem.adb (Initialize): Fix bug that blew up if called a second time. 2011-10-24 Robert Dewar <dewar@adacore.com> * tb-alvxw.c, tracebak.c, expect.c, initflt.c, tb-alvms.c, tb-ivms.c, tb-gcc.c: Update headers to GPL 3. 2011-10-24 Robert Dewar <dewar@adacore.com> * sem_prag.adb (Analyze_Pragma, case Debug): Give proper pragma name in error msg. 2011-10-24 Hristian Kirtchev <kirtchev@adacore.com> * gnat_rm.texi Add an entry for restriction No_Finalization. 2011-10-24 Ed Schonberg <schonberg@adacore.com> * sem_ch12.adb (Insert_Freeze_Node_For_Instance): If the current instance is within the one that contains the generic, the freeze node for the current one must appear in the current declarative part. Ditto if the current instance is within another package instance. In both of these cases the freeze node of the previous instance is not relevant. 2011-10-24 Gary Dismukes <dismukes@adacore.com> * switch-m.adb (Normalize_Compiler_Switches): Add recognition of AAMP-specific switches -univ and -aamp_target. 2011-10-24 Robert Dewar <dewar@adacore.com> * a-tienau.adb (Put): Deal properly with limited line length. 2011-10-24 Robert Dewar <dewar@adacore.com> * sem_warn.adb, sem_ch12.adb: Minor reformatting. From-SVN: r180375
126 lines
4.8 KiB
C
126 lines
4.8 KiB
C
/****************************************************************************
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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 - G C C t a b l e s *
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* *
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* C Implementation File *
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* *
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* Copyright (C) 2004-2011, Free Software Foundation, Inc. *
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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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/* This is an implementation of the __gnat_backtrace routine using the
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underlying GCC unwinding support associated with the exception handling
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infrastructure. This will only work for ZCX based applications. */
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#include <unwind.h>
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/* The implementation boils down to a call to _Unwind_Backtrace with a
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tailored callback and carried-on data structure to keep track of the
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input parameters we got as well as of the basic processing state. */
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/******************
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* trace_callback *
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******************/
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#if !defined (__USING_SJLJ_EXCEPTIONS__)
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typedef struct {
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void ** traceback;
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int max_len;
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void * exclude_min;
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void * exclude_max;
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int n_frames_to_skip;
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int n_frames_skipped;
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int n_entries_filled;
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} uw_data_t;
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#if defined (__ia64__) && defined (__hpux__)
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#include <uwx.h>
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#endif
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static _Unwind_Reason_Code
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trace_callback (struct _Unwind_Context * uw_context, uw_data_t * uw_data)
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{
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char * pc;
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#if defined (__ia64__) && defined (__hpux__)
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/* Work around problem with _Unwind_GetIP on ia64 HP-UX. */
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uwx_get_reg ((struct uwx_env *) uw_context, UWX_REG_IP, (uint64_t *) &pc);
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#else
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pc = (char *) _Unwind_GetIP (uw_context);
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#endif
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if (uw_data->n_frames_skipped < uw_data->n_frames_to_skip)
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{
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uw_data->n_frames_skipped ++;
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return _URC_NO_REASON;
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}
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if (uw_data->n_entries_filled >= uw_data->max_len)
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return _URC_NORMAL_STOP;
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if (pc < (char *)uw_data->exclude_min || pc > (char *)uw_data->exclude_max)
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uw_data->traceback [uw_data->n_entries_filled ++] = pc + PC_ADJUST;
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return _URC_NO_REASON;
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}
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#endif
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/********************
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* __gnat_backtrace *
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********************/
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int
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__gnat_backtrace (void ** traceback __attribute__((unused)),
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int max_len __attribute__((unused)),
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void * exclude_min __attribute__((unused)),
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void * exclude_max __attribute__((unused)),
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int skip_frames __attribute__((unused)))
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{
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#if defined (__USING_SJLJ_EXCEPTIONS__)
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/* We have no unwind material (tables) at hand with sjlj eh, and no
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way to retrieve complete and accurate call chain information from
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the context stack we maintain. */
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return 0;
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#else
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uw_data_t uw_data;
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/* State carried over during the whole unwinding process. */
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uw_data.traceback = traceback;
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uw_data.max_len = max_len;
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uw_data.exclude_min = exclude_min;
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uw_data.exclude_max = exclude_max;
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uw_data.n_frames_to_skip = skip_frames;
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uw_data.n_frames_skipped = 0;
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uw_data.n_entries_filled = 0;
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_Unwind_Backtrace ((_Unwind_Trace_Fn)trace_callback, &uw_data);
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return uw_data.n_entries_filled;
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#endif
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}
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