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Re: [patch] RFC asan support for i?86/x86_64-*freebsd*

On 11/29/2015 03:10 PM, Andreas Tobler wrote:

All,

this patch adds support for asan for i?86/x86_64-*freebsd*.

Test results can be found on the list.

These modifications belong only to gcc. There is one modification to
asan/asan_linux.cc, this one is sent upstream. Until this one is in, my
patch is on hold.

One thing to note, FreeBSD does not need to link against -ldl. That is
why I added an extra config check.

But nevertheless I'd like to get some comments on the patch.

Thanks to Jakub and Dan McGregor.

Thanks,
Andreas


2015-11-29  Andreas Tobler  <andreast@gcc.gnu.org>

     * config/i386/i386.h: Define two new macros:
     SUBTARGET_SHADOW_OFFSET_64 and SUBTARGET_SHADOW_OFFSET_32.
     * config/i386/i386.c (ix86_asan_shadow_offset): Use these macros.
     * config/i386/darwin.h: Override the SUBTARGET_SHADOW_OFFSET_64
     macro.
     * config/i386/freebsd.h: Override the SUBTARGET_SHADOW_OFFSET_64
     and the SUBTARGET_SHADOW_OFFSET_32 macro.
     * config/freebsd.h (LIBASAN_EARLY_SPEC): Define.
     (LIBTSAN_EARLY_SPEC): Likewise.
     (LIBLSAN_EARLY_SPEC): Likewise.

2015-11-29  Andreas Tobler  <andreast@gcc.gnu.org>

     * configure.ac: Replace the hard-coded -ldl requirement for
     link_sanitizer_common with a configure time check for -ldl.
     * configure: Regenerate.
     * configure.tgt: Add x86_64- and i?86-*-freebsd* targets.
The configury bits are fine. Uros would own review on the x86 specific changes. 

jeff
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