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libsanitizer merge from upstream r173241

From: Konstantin Serebryany <konstantin dot s dot serebryany at gmail dot com>
To: GCC Patches <gcc-patches at gcc dot gnu dot org>, Jakub Jelinek <jakub at redhat dot com>, Dodji Seketeli <dodji at redhat dot com>, Dmitry Vyukov <dvyukov at google dot com>
Date: Wed, 23 Jan 2013 14:31:57 +0400
Subject: libsanitizer merge from upstream r173241

Hi,

The attached patch is the libsanitizer merge from upstream r173241.

Lots of changes. Among other things:
  - slow CFI-based unwinder is on by default for fatal errors
(fast_unwind_on_fatal=0, Linux-only)
  - more interceptors in asan/tsan
  - new asan allocator on Linux (faster and uses less memory than the old one)
  - Dropped dependency on CoreFoundation (Mac OS)

Patch for libsanitizer is automatically generated by libsanitizer/merge.sh
Tested with
rm -rf */{*/,}libsanitizer \
  && make -j 50 \
  && make -C gcc check-g{cc,++}
RUNTESTFLAGS='--target_board=unix\{-m32,-m64\} asan.exp'

Our internal LLVM bots (Linux, Mac and Android) are green.

Ok to commit?

--kcc

Attachment: libsanitizer-173241.patch
Description: Binary data

Follow-Ups:
- Re: libsanitizer merge from upstream r173241
  - From: Dmitry Vyukov
- Re: libsanitizer merge from upstream r173241
  - From: Jakub Jelinek

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