rebase

Created using spr 1.3.4

Author: vitalybuka

compiler-rt/lib/sanitizer_common/sanitizer_posix_libcdep.cpp

@@ -327,6 +327,8 @@ bool IsAccessibleMemoryRange(uptr beg, uptr size) {
 }
 
 bool TryMemCpy(void *dest, const void *src, uptr n) {
+  if (!n)
+    return true;
   int fds[2];
   CHECK_EQ(0, pipe(fds));
 

compiler-rt/lib/sanitizer_common/tests/sanitizer_posix_test.cpp

@@ -16,6 +16,7 @@
 #  include <pthread.h>
 #  include <sys/mman.h>
 
+#  include <algorithm>
 #  include <numeric>
 
 #  include "gtest/gtest.h"