[Bug sanitizer/78878] New: stacktrace engine can't use compressed/separated debug info for extracting symbols.

["pawel_sikora at zoho dot com" <gcc-bugzilla at gcc dot gnu dot org>]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78878

            Bug ID: 78878
           Summary: stacktrace engine can't use compressed/separated debug
                    info for extracting symbols.
           Product: gcc
           Version: 6.2.1
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: sanitizer
          Assignee: unassigned at gcc dot gnu.org
          Reporter: pawel_sikora at zoho dot com
                CC: dodji at gcc dot gnu.org, dvyukov at gcc dot gnu.org,
                    jakub at gcc dot gnu.org, kcc at gcc dot gnu.org
  Target Milestone: ---

Created attachment 40384
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=40384&action=edit
testcase

hi,

i've noticed that compressed debuginfo (or externally accessible via
.gnu_debuglink section) is not used for decorating sanitizer stacktrace.


e.g.:

=================================================================
==6290==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 4 byte(s) in 1 object(s) allocated from:
    #0 0x7f4d243840ce in operator new(unsigned long)
(/lib64/liblsan.so.0+0xe0ce)
    #1 0x400693  (/home/pawels/bugs/mem-leak/m+0x400693)
    #2 0x40069f  (/home/pawels/bugs/mem-leak/m+0x40069f)
    #3 0x7f4d23728400 in __libc_start_main (/lib64/libc.so.6+0x20400)


without compression/debuglink the stacktrace is more readable:

=================================================================
==6318==ERROR: LeakSanitizer: detected memory leaks

Direct leak of 4 byte(s) in 1 object(s) allocated from:
    #0 0x7efe533370ce in operator new(unsigned long)
(/lib64/liblsan.so.0+0xe0ce)
    #1 0x400693 in leak() /home/pawels/bugs/mem-leak/m.cpp:4
    #2 0x40069f in main /home/pawels/bugs/mem-leak/m.cpp:8
    #3 0x7efe526db400 in __libc_start_main (/lib64/libc.so.6+0x20400)