tracebak.c: Use tb-ivms.c on OpenVMS Itanium.

2007-08-14  Tristan Gingold  <gingold@adacore.com>

	* tracebak.c: Use tb-ivms.c on OpenVMS Itanium.

	* tb-ivms.c: New file.

	* g-trasym-vms-ia64.adb: Fixed for OpenVMS version 8.2

From-SVN: r127466

gcc/ada/tb-ivms.c

+/****************************************************************************
+ *                                                                          *
+ *                         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;
+}

gcc/ada/tracebak.c

@@ -6,7 +6,7 @@
  *                                                                          *
  *                          C Implementation File                           *
  *                                                                          *
- *                     Copyright (C) 2000-2006, AdaCore                     *
+ *                     Copyright (C) 2000-2007, 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- *
@@ -97,7 +97,12 @@ extern void (*Unlock_Task) (void);
 
 #include "tb-alvms.c"
 
+#elif defined (__ia64__) && defined (__VMS__)
+
+#include "tb-ivms.c"
+
 #else
+
 /* No target specific implementation.  */
 
 /*----------------------------------------------------------------*