From patchwork Wed Nov 21 19:25:35 2012
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Subject: What CPP macro should -fsanitize=address define?
Date: Wed, 21 Nov 2012 09:25:35 -0000
From: "H.J. Lu" <hjl.tools@gmail.com>
X-Patchwork-Id: 200837
Message-Id: <CAMe9rOrT7qt0c0mYF=BeUhuBNi+az6scXBnvBC=F1nW-37R44A@mail.gmail.com>
To: Konstantin Serebryany <konstantin.s.serebryany@gmail.com>
Cc: GCC Patches <gcc-patches@gcc.gnu.org>

On Wed, Nov 21, 2012 at 10:47 AM, Konstantin Serebryany
<konstantin.s.serebryany@gmail.com> wrote:
> On Wed, Nov 21, 2012 at 10:42 PM, H.J. Lu <hjl.tools@gmail.com> wrote:
>> Hi,
>>
>> I am working on ASAN bootstrap support.  I need a CPP macro
>> for -fsanitize=address.  I am learning toward __SANITIZE_ADDRESS__.
>
> That would be a reasonable option
> (some background: http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55397)
>

Here is a patch.  OK to install?

Thanks.


diff --git a/gcc/cppbuiltin.c b/gcc/cppbuiltin.c
index 05d82f5..c3ca21a 100644
--- a/gcc/cppbuiltin.c
+++ b/gcc/cppbuiltin.c
@@ -91,6 +91,9 @@ define_builtin_macros_for_compilation_flags
(cpp_reader *pfile)
       cpp_define_formatted (pfile, "__PIE__=%d", flag_pie);
     }

+  if (flag_asan)
+    cpp_define (pfile, "__SANITIZE_ADDRESS__");
+
   if (optimize_size)
     cpp_define (pfile, "__OPTIMIZE_SIZE__");