[SCM] archer-jankratochvil-entryval: Missing DW_TAG_GNU_call_site_parameter is also not invalid.

[jkratoch@sourceware.org]

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       via  970cbf09881497309688104d92011dac29363fb6 (commit)
      from  acaf239bbbc87d909fe4d3ac1eb26bdcdcb137de (commit)

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- Log -----------------------------------------------------------------
commit 970cbf09881497309688104d92011dac29363fb6
Author: Jan Kratochvil <jan.kratochvil@redhat.com>
Date:   Sun Sep 5 14:26:24 2010 +0200

    Missing DW_TAG_GNU_call_site_parameter is also not invalid.

-----------------------------------------------------------------------

Summary of changes:
 gdb/dwarf2loc.c |   14 ++++++++++++--
 1 files changed, 12 insertions(+), 2 deletions(-)

First 500 lines of diff:
diff --git a/gdb/dwarf2loc.c b/gdb/dwarf2loc.c
index 651c8f4..924f317 100644
--- a/gdb/dwarf2loc.c
+++ b/gdb/dwarf2loc.c
@@ -748,8 +748,18 @@ dwarf_expr_regnum_entry_value (void *baton, int regnum, CORE_ADDR deref_size)
 	break;
     }
   if (iparams == call_site_stuff->parameter_count)
-    error (_("Cannot find register %d at DW_TAG_GNU_call_site %s"),
-	   regnum, paddress (caller_gdbarch, caller_pc));
+    {
+      struct minimal_symbol *msym = lookup_minimal_symbol_by_pc (caller_pc);
+
+      /* DW_TAG_GNU_call_site_parameter will be missing just if GCC could not
+         determine its value.  So do not complain more than
+         VALUE_OPTIMIZED_OUT_ERROR.  */
+      throw_error (VALUE_OPTIMIZED_OUT_ERROR,
+		   _("Cannot find register %d at "
+		     "DW_TAG_GNU_call_site %s at %s"),
+		   regnum, paddress (caller_gdbarch, caller_pc),
+		   ! msym ? "???" : SYMBOL_PRINT_NAME (msym)); 
+    }
 
   if (deref_size == -1)
     {


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