[Bug bootstrap/55792] Bad memory access with profiledbootstrap and LTO

[hjl.tools at gmail dot com]

http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55792

--- Comment #3 from H.J. Lu <hjl.tools at gmail dot com> 2013-01-03 19:03:25 UTC ---
I got

==23584== ERROR: AddressSanitizer: heap-buffer-overflow on address
0x7f03d1089238 at pc 0xb9284a bp 0x7fffbd507b60 sp 0x7fffbd507b58
READ of size 1 at 0x7f03d1089238 thread T0
    #0 0xb92849
(/export/build/gnu/gcc-lto-fdo-asan/build-x86_64-linux/prev-gcc/lto1+0xb92849)
0x7f03d1089238 is located 504 bytes inside of 4072-byte region
[0x7f03d1089040,0x7f03d108a028)
freed by thread T0 here:
    #0 0x3afde5e
(/export/build/gnu/gcc-lto-fdo-asan/build-x86_64-linux/prev-gcc/lto1+0x3afde5e)
    #1 0x3aebcfc
(/export/build/gnu/gcc-lto-fdo-asan/build-x86_64-linux/prev-gcc/lto1+0x3aebcfc)
previously allocated by thread T0 here:
    #0 0x3afdfd4
(/export/build/gnu/gcc-lto-fdo-asan/build-x86_64-linux/prev-gcc/lto1+0x3afdfd4)
    #1 0x3af6b1e
(/export/build/gnu/gcc-lto-fdo-asan/build-x86_64-linux/prev-gcc/lto1+0x3af6b1e)
Shadow byte and word:
  0x1fe07a211247: fa
  0x1fe07a211240: fa fa fa fa fa fa fa fa
More shadow bytes:
  0x1fe07a211220: fa fa fa fa fa fa fa fa
  0x1fe07a211228: fa fa fa fa fa fa fa fa
  0x1fe07a211230: fa fa fa fa fa fa fa fa
  0x1fe07a211238: fa fa fa fa fa fa fa fa
=>0x1fe07a211240: fa fa fa fa fa fa fa fa
  0x1fe07a211248: fa fa fa fa fa fa fa fa
  0x1fe07a211250: fa fa fa fa fa fa fa fa
  0x1fe07a211258: fa fa fa fa fa fa fa fa
  0x1fe07a211260: fa fa fa fa fa fa fa fa

[hjl@gnu-mic-2 prev-gcc]$ addr2line -e lto1 0xb92849
/export/gnu/import/git/gcc-misc/gcc/dwarf2out.c:22425
[hjl@gnu-mic-2 prev-gcc]$ addr2line -e lto1 0x3afde5e
/export/gnu/import/git/gcc-misc/libsanitizer/asan/asan_malloc_linux.cc:60
[hjl@gnu-mic-2 prev-gcc]$ addr2line -e lto1 0x3aebcfc
/export/gnu/import/git/gcc-misc/libiberty/hashtab.c:584
[hjl@gnu-mic-2 prev-gcc]$ addr2line -e lto1 0x3afdfd4
/export/gnu/import/git/gcc-misc/libsanitizer/asan/asan_malloc_linux.cc:86
[hjl@gnu-mic-2 prev-gcc]$ addr2line -e lto1 0x3af6b1e
/export/gnu/import/git/gcc-misc/libiberty/xmalloc.c:162
[hjl@gnu-mic-2 prev-gcc]$