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Peter Wu 1db004ebdd [ASAN] Fix crash on i?86-linux (32-bit) against glibc 2.27 and later 
Summary:
Running sanitized 32-bit x86 programs on glibc 2.27 crashes at startup, with:

    ERROR: AddressSanitizer: SEGV on unknown address 0xf7a8a250 (pc 0xf7f807f4 bp 0xff969fc8 sp 0xff969f7c T16777215)
    The signal is caused by a WRITE memory access.
    #0 0xf7f807f3 in _dl_get_tls_static_info (/lib/ld-linux.so.2+0x127f3)
    #1 0xf7a92599  (/lib/libasan.so.5+0x112599)
    #2 0xf7a80737  (/lib/libasan.so.5+0x100737)
    #3 0xf7f7e14f in _dl_init (/lib/ld-linux.so.2+0x1014f)
    #4 0xf7f6eb49  (/lib/ld-linux.so.2+0xb49)

The problem is that glibc changed the calling convention for the GLIBC_PRIVATE
symbol that sanitizer uses (even when it should not, GLIBC_PRIVATE is exactly
for symbols that can change at any time, be removed etc.), see
https://sourceware.org/ml/libc-alpha/2017-08/msg00497.html

Fixes https://github.com/google/sanitizers/issues/954

Patch By: Jakub Jelinek

Reviewed By: vitalybuka, Lekensteyn

Differential Revison: https://reviews.llvm.org/D44623

llvm-svn: 334363
 		2018-06-10 11:17:47 +00:00
..
cmake [CMake] Fix Libc++ Modules build. 2018-06-07 19:57:43 +00:00
docs [sanitizers] Make it possible to XFAIL on the effective target, not just the default. 2016-08-09 11:50:53 +00:00
include Fix a typo; NFC 2018-05-26 02:28:43 +00:00
lib [ASAN] Fix crash on i?86-linux (32-bit) against glibc 2.27 and later 2018-06-10 11:17:47 +00:00
test [MSan] Switch to common aligned allocs tests. 2018-06-09 00:47:37 +00:00
unittests Allow compiler-rt test targets to work with multi-config CMake generators 2017-11-13 12:57:54 +00:00
utils [sanitizer] Cleanup sorting functions 2018-05-09 20:42:11 +00:00
www
…
.arcconfig [compiler-rt] Set up .arcconfig to point to new Diffusion CRT repository 2017-12-06 20:55:32 +00:00
.gitignore Add .pyc files to .gitignore to compiler-rt 2017-07-24 21:51:12 +00:00
CMakeLists.txt [CMake] Support builtins as Clang default rtlib in compiler-rt 2018-05-22 22:58:48 +00:00
CODE_OWNERS.TXT [sanitizers] remove earthdok@ from owners 2016-05-18 18:52:18 +00:00
CREDITS.TXT
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LICENSE.TXT Update copyright year to 2016. 2016-03-30 22:38:50 +00:00
README.txt
…

README.txt 

Compiler-RT
================================

This directory and its subdirectories contain source code for the compiler
support routines.

Compiler-RT is open source software. You may freely distribute it under the
terms of the license agreement found in LICENSE.txt.

================================