[Bug binutils/25355] nm reports data variable as "T" with -flto

[marxin.liska at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=25355

Martin Liška <marxin.liska at gmail dot com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|FIXED                       |---

--- Comment #48 from Martin Liška <marxin.liska at gmail dot com> ---
Ok, I've just packaged the 2.34 release branch with the backport of this issue.
However, I see the following Invalid free:

$ touch a.c && gcc -c -flto a.c -o a.o
$ touch a.c && gcc -c -flto a.c -o b.o
$ ar r libconsole.a a.o b.o
ar: creating libconsole.a
bfd plugin: could not unlink output file
free(): invalid pointer
Aborted (core dumped)

$ valgrind ar r libconsole.a a.o b.o
==17300== Memcheck, a memory error detector
==17300== Copyright (C) 2002-2017, and GNU GPL'd, by Julian Seward et al.
==17300== Using Valgrind-3.15.0 and LibVEX; rerun with -h for copyright info
==17300== Command: ar r libconsole.a a.o b.o
==17300== 
==17300== Invalid free() / delete / delete[] / realloc()
==17300==    at 0x4839D7B: realloc (in
/usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==17300==    by 0x4B71929: xrealloc (xmalloc.c:179)
==17300==    by 0x485B1B2: ??? (in
/usr/lib64/gcc/x86_64-suse-linux/9/liblto_plugin.so.0.0.0)
==17300==    by 0x4B5E338: try_claim (plugin.c:565)
==17300==    by 0x4B5E338: try_load_plugin (plugin.c:723)
==17300==    by 0x4B5E91B: load_plugin (plugin.c:855)
==17300==    by 0x4B5E91B: bfd_plugin_object_p (plugin.c:868)
==17300==    by 0x49857F5: bfd_check_format_matches (format.c:261)
==17300==    by 0x497E5FC: _bfd_compute_and_write_armap (archive.c:2283)
==17300==    by 0x497EF0B: _bfd_write_archive_contents (archive.c:2147)
==17300==    by 0x498CE09: bfd_close (opncls.c:755)
==17300==    by 0x10E45F: write_archive (ar.c:1240)
==17300==    by 0x10F0CB: replace_members (ar.c:1482)
==17300==    by 0x10BF4C: main (ar.c:887)
==17300==  Address 0x4f568b0 is 0 bytes inside a block of size 8 free'd
==17300==    at 0x48389AB: free (in
/usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==17300==    by 0x485ABC3: ??? (in
/usr/lib64/gcc/x86_64-suse-linux/9/liblto_plugin.so.0.0.0)
==17300==    by 0x4B5E362: try_claim (plugin.c:574)
==17300==    by 0x4B5E362: try_load_plugin (plugin.c:723)
==17300==    by 0x4B5E91B: load_plugin (plugin.c:855)
==17300==    by 0x4B5E91B: bfd_plugin_object_p (plugin.c:868)
==17300==    by 0x49857F5: bfd_check_format_matches (format.c:261)
==17300==    by 0x497EA17: _bfd_write_archive_contents (archive.c:2127)
==17300==    by 0x498CE09: bfd_close (opncls.c:755)
==17300==    by 0x10E45F: write_archive (ar.c:1240)
==17300==    by 0x10F0CB: replace_members (ar.c:1482)
==17300==    by 0x10BF4C: main (ar.c:887)
==17300==  Block was alloc'd at
==17300==    at 0x483777F: malloc (in
/usr/lib64/valgrind/vgpreload_memcheck-amd64-linux.so)
==17300==    by 0x4B7193F: xrealloc (xmalloc.c:177)
==17300==    by 0x485B1B2: ??? (in
/usr/lib64/gcc/x86_64-suse-linux/9/liblto_plugin.so.0.0.0)
==17300==    by 0x4B5E338: try_claim (plugin.c:565)
==17300==    by 0x4B5E338: try_load_plugin (plugin.c:723)
==17300==    by 0x4B5E91B: load_plugin (plugin.c:855)
==17300==    by 0x4B5E91B: bfd_plugin_object_p (plugin.c:868)
==17300==    by 0x49857F5: bfd_check_format_matches (format.c:261)
==17300==    by 0x497EA17: _bfd_write_archive_contents (archive.c:2127)
==17300==    by 0x498CE09: bfd_close (opncls.c:755)
==17300==    by 0x10E45F: write_archive (ar.c:1240)
==17300==    by 0x10F0CB: replace_members (ar.c:1482)
==17300==    by 0x10BF4C: main (ar.c:887)
==17300== 

ar: out of memory allocating 16 bytes after a total of 0 bytes

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