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From: "glider at google dot com" <gcc-bugzilla@gcc.gnu.org>
To: gcc-bugs@gcc.gnu.org
Subject: [Bug sanitizer/55599] switch from mach_override to mac interpose function support in libasan broke -static-libasan
Date: Wed, 05 Dec 2012 04:51:00 -0000	[thread overview]
Message-ID: <bug-55599-4-6YUOL8Rqkm@http.gcc.gnu.org/bugzilla/> (raw)
In-Reply-To: <bug-55599-4@http.gcc.gnu.org/bugzilla/>


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55599

--- Comment #5 from Alexander Potapenko <glider at google dot com> 2012-12-05 04:50:43 UTC ---
The dynamic interposition library is based on the __DATA,__interpose dyld
feature (see http://toves.freeshell.org/interpose/ or Amit Singh's "Mac OS X
Internals" book), which strictly requires the interposing functions to be in a
shared library that must be preloaded using DYLD_INSERT_LIBRARIES (ASan does
that automatically in __asan_init)
The dynamic library doesn't require the mach_override code (we don't link it in
LLVM), but the static one does. Since you have removed the mach_override code,
it's time to drop the static library support (note that in LLVM the static
runtime library is still the default one, because it's now the one that simply
works)


  parent reply	other threads:[~2012-12-05  4:51 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-12-05  0:01 [Bug sanitizer/55599] New: " howarth at nitro dot med.uc.edu
2012-12-05  0:07 ` [Bug sanitizer/55599] " howarth at nitro dot med.uc.edu
2012-12-05  1:07 ` glider at google dot com
2012-12-05  3:47 ` howarth at nitro dot med.uc.edu
2012-12-05  4:01 ` kcc at gcc dot gnu.org
2012-12-05  4:51 ` glider at google dot com [this message]
2012-12-05  6:11 ` kcc at gcc dot gnu.org
2012-12-08 19:06 ` howarth at nitro dot med.uc.edu

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