sanitizer_common: fix and re-enable signal_segv_handler test

struct sigaction was not initialized. As the result if SA_RESETHAND is set in sa_flags, then the handler is reset after first invocation leading to crash.
Initialize struct sigaction to zero.

Reviewed in http://reviews.llvm.org/D10803



git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@240965 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 3 insertions, 2 deletions

diff --git a/test/sanitizer_common/TestCases/Linux/signal_segv_handler.cc b/test/sanitizer_common/TestCases/Linux/signal_segv_handler.cc
index dd18213d6..23e32a884 100644
--- a/test/sanitizer_common/TestCases/Linux/signal_segv_handler.cc
+++ b/test/sanitizer_common/TestCases/Linux/signal_segv_handler.cc
@@ -13,12 +13,11 @@
 // "benign" SEGVs that are handled by signal handler, and ensures that
 // the process survive.
 
-// REQUIRES: disabled
-
 #include <stdio.h>
 #include <stdlib.h>
 #include <signal.h>
 #include <sys/mman.h>
+#include <string.h>
 
 void *guard;
 
@@ -28,6 +27,8 @@ void handler(int signo, siginfo_t *info, void *uctx) {
 
 int main() {
   struct sigaction a, old;
+  memset(&a, 0, sizeof(a));
+  memset(&old, 0, sizeof(old));
   a.sa_sigaction = handler;
   a.sa_flags = SA_SIGINFO;
   sigaction(SIGSEGV, &a, &old);