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Subject: [Bug lto/45375] [meta-bug] Issues with building Mozilla with LTO
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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45375

--- Comment #43 from Mike Hommey <mh+gcc at glandium dot org> 2011-02-10 17:41:53 UTC ---
(In reply to comment #42)
> (In reply to comment #41)
> > 
> > Segfaults or aborts ?
> 
> Segfaults:
> 
> ===
> === If you get failures below, please file a bug describing the error
> === and your environment (compiler and linker versions), and use
> === --disable-elf-hack until this is fixed.
> ===
> /home/mjambor/mozilla/mc2/objdir-ff-release/build/unix/elfhack/elfhack -b
> test.so
> test.so: Reduced by 12128 bytes
> # Fail if the backup file doesn't exist
> [ -f "test.so.bak" ]
> # Fail if the new library doesn't contain less relocations
> [ $(objdump -R test.so.bak | wc -l) -gt $(objdump -R test.so | wc -l) ]
> /home/mjambor/gcc/icln/inst/bin/gcc -o dummy dummy.o test.so
> # Will either crash or return exit code 1 if elfhack is broken
> LD_LIBRARY_PATH=/home/mjambor/mozilla/mc2/objdir-ff-release/build/unix/elfhack
> /home/mjambor/mozilla/mc2/objdir-ff-release/build/unix/elfhack/dummy
> make[6]: *** [libs] Segmentation fault
> make[6]: Leaving directory
> `/home/mjambor/mozilla/mc2/objdir-ff-release/build/unix/elfhack'
> 
> ...and very early on it seems:
> 
> (gdb) bt
> #0  0x00007ffff7ff7040 in frame_dummy ()
>    from /home/mjambor/mozilla/mc2/objdir-ff-release/build/unix/elfhack/test.so
> #1  0x00007ffff7ff6f5e in _init () from
> /home/mjambor/mozilla/mc2/objdir-ff-release/build/unix/elfhack/test.so
> #2  0x00007ffff7ffa710 in ?? ()
> #3  0x00007ffff7debe18 in call_init () from /lib64/ld-linux-x86-64.so.2
> #4  0x00007ffff7debf47 in _dl_init_internal () from /lib64/ld-linux-x86-64.so.2
> #5  0x00007ffff7ddeb3a in _dl_start_user () from /lib64/ld-linux-x86-64.so.2

Ah, so this is a crash of the test, not of elfhack. Could you attach both
test.so and test.so.bak files ?