[Bug sanitizer/88291] [9 Regression] asan ICE in asan_clear_shadow

[jakub at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=88291

--- Comment #2 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Author: jakub
Date: Sun Dec  2 12:39:26 2018
New Revision: 266721

URL: https://gcc.gnu.org/viewcvs?rev=266721&root=gcc&view=rev
Log:
        PR sanitizer/88291
        * asan.c (asan_clear_shadow): Move assert that len is multiple of 4
        to the start of the function.
        (asan_emit_stack_protection): When emitting clearing sequence for
        epilogue, align offset down to ASAN_RED_ZONE_SIZE granularity,
        add last_size_aligned which is last_size padded to multiples of
        ASAN_RED_ZONE_SIZE and emit asan_clear_shadow always on 4 byte
        boundaries.

        * c-c++-common/asan/pr88291.c: New test.

Added:
    trunk/gcc/testsuite/c-c++-common/asan/pr88291.c
Modified:
    trunk/gcc/ChangeLog
    trunk/gcc/asan.c
    trunk/gcc/testsuite/ChangeLog