Skip to content
Commit 695c6dfe authored by Alan Modra's avatar Alan Modra
Browse files

PR29370, infinite loop in display_debug_abbrev

The PR29370 testcase is a fuzzed object file with multiple
.trace_abbrev sections.  Multiple .trace_abbrev or .debug_abbrev
sections are not a violation of the DWARF standard.  The DWARF5
standard even gives an example of multiple .debug_abbrev sections
contained in groups.  Caching and lookup of processed abbrevs thus
needs to be done by section and offset rather than base and offset.
(Why base anyway?)  Or, since section contents are kept, by a pointer
into the contents.

	PR 29370
	* dwarf.c (struct abbrev_list): Replace abbrev_base and
	abbrev_offset with raw field.
	(find_abbrev_list_by_abbrev_offset): Delete.
	(find_abbrev_list_by_raw_abbrev): New function.
	(process_abbrev_set): Set list->raw and list->next.
	(find_and_process_abbrev_set): Replace abbrev list lookup with
	new function.  Don't set list abbrev_base, abbrev_offset or next.
parent f07c08e1
Loading
Loading
Loading
Loading
0% Loading or .
You are about to add 0 people to the discussion. Proceed with caution.
Please register or to comment