[Msan] Check returning value of DTLS_Get()

v-kutuzov · v-kutuzov · commit 3e4542eac432 · 2014-11-26T10:42:02.000Z
Differential Revision: http://reviews.llvm.org/D6403 llvm-svn: 222818
diff --git a/compiler-rt/lib/msan/msan_thread.cc b/compiler-rt/lib/msan/msan_thread.cc
@@ -36,6 +36,7 @@ void MsanThread::ClearShadowForThreadStackAndTLS() {
   if (tls_begin_ != tls_end_)
     __msan_unpoison((void *)tls_begin_, tls_end_ - tls_begin_);
   DTLS *dtls = DTLS_Get();
+  CHECK_NE(dtls, 0);
   for (uptr i = 0; i < dtls->dtv_size; ++i)
     __msan_unpoison((void *)(dtls->dtv[i].beg), dtls->dtv[i].size);
 }

Original file line number	Diff line number	Diff line change
`@@ -36,6 +36,7 @@ void MsanThread::ClearShadowForThreadStackAndTLS() {`
`36`	`36`	`if (tls_begin_ != tls_end_)`
`37`	`37`	`__msan_unpoison((void *)tls_begin_, tls_end_ - tls_begin_);`
`38`	`38`	`DTLS *dtls = DTLS_Get();`
	`39`	`+ CHECK_NE(dtls, 0);`
`39`	`40`	`for (uptr i = 0; i < dtls->dtv_size; ++i)`
`40`	`41`	`__msan_unpoison((void *)(dtls->dtv[i].beg), dtls->dtv[i].size);`
`41`	`42`	`}`