From: cypherpunks <cypherpunks@torproject.org>
Date: Thu, 19 May 2016 13:09:31 +0000 (+0000)
Subject: Prevent ASAN from registering a SIGSEGV handler
X-Git-Tag: tor-0.2.9.1-alpha~220
X-Git-Url: http://git.ipfire.org/gitweb.cgi?a=commitdiff_plain;h=0e20d056e91b033239da0253346788bdba8098e9;p=thirdparty%2Ftor.git

Prevent ASAN from registering a SIGSEGV handler

AddressSanitizer's (ASAN) SIGSEGV handler overrides the backtrace
handler and prevents it from printing its backtrace. The output of ASAN
is different from what 'bt_test.py' expects and causes backtrace test
failures.

The 'allow_user_segv_handler' option allows applications to set their
own SIGSEGV handler but is not supported by older GCC versions. These
older GCC versions do support the 'handle_segv' which prevents ASAN from
setting its SIGSEGV handler.
---

diff --git a/src/test/test_bt.sh b/src/test/test_bt.sh
index 83fa3ff24b..fe1781659d 100755
--- a/src/test/test_bt.sh
+++ b/src/test/test_bt.sh
@@ -3,6 +3,7 @@
 
 exitcode=0
 
+export ASAN_OPTIONS="handle_segv=0:allow_user_segv_handler=1"
 "${builddir:-.}/src/test/test-bt-cl" backtraces || exit $?
 "${builddir:-.}/src/test/test-bt-cl" assert 2>&1 | "${PYTHON:-python}" "${abs_top_srcdir:-.}/src/test/bt_test.py" || exitcode="$?"
 "${builddir:-.}/src/test/test-bt-cl" crash  2>&1 | "${PYTHON:-python}" "${abs_top_srcdir:-.}/src/test/bt_test.py" || exitcode="$?"