From: Eli Bendersky <eliben@gmail.com>
Date: Sun, 6 Jan 2013 14:09:57 +0000 (-0800)
Subject: Issue #7: be more forgiving to incorrect DWARF that has extra NULLs in DIE trees
X-Git-Tag: v0.21~34
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=1a844f54f79641e7d3e7754e875eaff0412dc765;p=pyelftools.git

Issue #7: be more forgiving to incorrect DWARF that has extra NULLs in DIE trees
---

diff --git a/elftools/dwarf/compileunit.py b/elftools/dwarf/compileunit.py
index fbe4a8b..f7acaab 100644
--- a/elftools/dwarf/compileunit.py
+++ b/elftools/dwarf/compileunit.py
@@ -143,6 +143,11 @@ class CompileUnit(object):
                 if die.has_children:
                     parentstack.append(die)
             else:
-                # end of children for the current parent
-                parentstack.pop()
+                # parentstack should not be really empty here. However, some
+                # compilers generate DWARF that has extra NULLs in the end and
+                # we don't want pyelftools to fail parsing them just because of
+                # this.
+                if len(parentstack) > 0:
+                    # end of children for the current parent
+                    parentstack.pop()