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From: Konstantin Serebryany <konstantin.s.serebryany@gmail.com>
Date: Thu, 10 Jan 2013 07:01:00 -0000
Message-ID: <CAGQ9bdxfjWqRxBiictsbKQjvJ7Wz2qsSsgzbmoZyeMnZA48KZA@mail.gmail.com>
Subject: libsanitizer mege from upstream r171973
To: GCC Patches <gcc-patches@gcc.gnu.org>, Jakub Jelinek <jakub@redhat.com>, 	Dodji Seketeli <dodji@redhat.com>, Dmitry Vyukov <dvyukov@google.com>, Wei Mi <wmi@google.com>
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Hi,

The attached patch is the libsanitizer merge from upstream r171973.

Lots of changes. Among other things:
  - slow CFI-based unwinder (off by default for now)
  - more interceptors in asan (read, pread, etc)
  - precise handling of memset/memcpy/etc (detects first overrun byte)
  - new experimental asan allocator (off by default)
  - asan now detects new/free, malloc/delete and new/delete[] mismatches
  - tsan now detects more races IO operations

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 also green, but
since the changes are large something may potentially break on other
platforms.

Ok to commit?

--kcc