[ASan] fix __asan_get_ownership(p) and __asan_get_allocated_size(p) for the p = malloc(0)

git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@172717 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 9 insertions, 1 deletions

diff --git a/lib/asan/tests/asan_noinst_test.cc b/lib/asan/tests/asan_noinst_test.cc
index fc4a3d1f5..8a7f77455 100644
--- a/lib/asan/tests/asan_noinst_test.cc
+++ b/lib/asan/tests/asan_noinst_test.cc
@@ -382,8 +382,16 @@ TEST(AddressSanitizerInterface, GetAllocatedSizeAndOwnershipTest) {
   free(array);
   EXPECT_FALSE(__asan_get_ownership(array));
   EXPECT_DEATH(__asan_get_allocated_size(array), kGetAllocatedSizeErrorMsg);
-
   delete int_ptr;
+
+  void *zero_alloc = Ident(malloc(0));
+  if (zero_alloc != 0) {
+    // If malloc(0) is not null, this pointer is owned and should have valid
+    // allocated size.
+    EXPECT_TRUE(__asan_get_ownership(zero_alloc));
+    EXPECT_EQ(0U, __asan_get_allocated_size(zero_alloc));
+  }
+  free(zero_alloc);
 }
 
 TEST(AddressSanitizerInterface, GetCurrentAllocatedBytesTest) {