[compiler-rt] r333306 - [MemorySanitizer] fix mmap test for oses not implementing MAP_NORESERVE flag

[David Carlier via llvm-commits]

Author: devnexen
Date: Fri May 25 13:30:39 2018
New Revision: 333306

URL: http://llvm.org/viewvc/llvm-project?rev=333306&view=rev
Log:

[MemorySanitizer] fix mmap test for oses not implementing MAP_NORESERVE flag

Reviewers: krytarowski, eugenis

Reviewed By: eugenis

Differential Revision: https://review.llvm.org/D47146

Modified:
    compiler-rt/trunk/test/msan/mmap.cc

Modified: compiler-rt/trunk/test/msan/mmap.cc
URL: http://llvm.org/viewvc/llvm-project/compiler-rt/trunk/test/msan/mmap.cc?rev=333306&r1=333305&r2=333306&view=diff
==============================================================================
--- compiler-rt/trunk/test/msan/mmap.cc (original)
+++ compiler-rt/trunk/test/msan/mmap.cc Fri May 25 13:30:39 2018
@@ -63,9 +63,13 @@ int main() {
   const size_t kMapSize = 0x1000000000ULL;
 #endif
   int success_count = 0;
+  int flags = MAP_PRIVATE | MAP_ANONYMOUS;
+#if defined(MAP_NORESERVE)
+  flags |= MAP_NORESERVE;
+#endif
   while (true) {
     void *p = mmap(0, kMapSize, PROT_WRITE,
-                   MAP_PRIVATE | MAP_ANONYMOUS | MAP_NORESERVE, -1, 0);
+                   flags, -1, 0);
     printf("%p\n", p);
     if (p == MAP_FAILED) {
       assert(errno == ENOMEM);