gdb/gdb-gnat-dwarf-crash-3of3.patch

From FEDORA_PATCHES Mon Sep 17 00:00:00 2001
From: Fedora GDB patches <invalid@email.com>
Date: Fri, 27 Oct 2017 21:07:50 +0200
Subject: gdb_assert -> complaint for weird DWARF

FileName: gdb-gnat-dwarf-crash-3of3.patch

;; Fix crash of -readnow /usr/lib/debug/usr/bin/gnatbind.debug (BZ 1069211).
;;=push+jan

http://sourceware.org/ml/gdb-patches/2014-02/msg00731.html

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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.
---
 gdb/dwarf2read.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/gdb/dwarf2read.c b/gdb/dwarf2read.c
index fbaa0af64f..2c972d5e74 100644
--- a/gdb/dwarf2read.c
+++ b/gdb/dwarf2read.c
@@ -10612,6 +10612,14 @@ private:
 static void
 process_die (struct die_info *die, struct dwarf2_cu *cu)
 {
+  if (die->in_process)
+    {
+      complaint (&symfile_complaints,
+		 _("DIE at 0x%x attempted to be processed twice"),
+		 to_underlying (die->sect_off));
+      return;
+    }
+
   process_die_scope scope (die, cu);
 
   switch (die->tag)
-- 
2.14.3