[patch] gdb_assert -> complaint for weird DWARF

[Jan Kratochvil <jan.kratochvil@redhat.com>]

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Hi,

PR 16581:
	GDB crash on inherit_abstract_dies infinite recursion
	https://sourceware.org/bugzilla/show_bug.cgi?id=16581

fixed crash from an infinite recursion.  But in rare cases the new code can
now gdb_assert() due to weird DWARF file.

I do not yet fully understand why the DWARF is as it is but just GDB should
never crash due to invalid DWARF anyway.  The "invalid" DWARF I see only in
Fedora GCC build, not in FSF GCC build, more info at:
	https://bugzilla.redhat.com/show_bug.cgi?id=1069382
	http://people.redhat.com/jkratoch/gcc-debuginfo-4.8.2-7.fc20.x86_64-gnatbind.debug


Thanks,
Jan

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gdb/
2014-02-24  Jan Kratochvil  <jan.kratochvil@redhat.com>

	* dwarf2read.c (process_die): Change gdb_assert to complaint.

diff --git a/gdb/dwarf2read.c b/gdb/dwarf2read.c
index 3eaa0b1..71f5d34 100644
--- a/gdb/dwarf2read.c
+++ b/gdb/dwarf2read.c
@@ -8029,7 +8029,13 @@ process_die (struct die_info *die, struct dwarf2_cu *cu)
   struct cleanup *in_process;
 
   /* We should only be processing those not already in process.  */
-  gdb_assert (!die->in_process);
+  if (die->in_process)
+    {
+      complaint (&symfile_complaints,
+		 _("DIE at 0x%x attempted to be processed twice"),
+		 die->offset.sect_off);
+      return;
+    }
 
   die->in_process = 1;
   in_process = make_cleanup (reset_die_in_process,die);