1 files changed, 64 insertions, 0 deletions
diff --git a/lib/tsan/lit_tests/allocator_returns_null.cc b/lib/tsan/lit_tests/allocator_returns_null.cc
new file mode 100644
index 000000000000..4b5eb5504c27
--- /dev/null
+++ b/lib/tsan/lit_tests/allocator_returns_null.cc
@@ -0,0 +1,64 @@
+// Test the behavior of malloc/calloc/realloc when the allocation size is huge.
+// By default (allocator_may_return_null=0) the process shoudl crash.
+// With allocator_may_return_null=1 the allocator should return 0.
+//
+// RUN: %clangxx_tsan -O0 %s -o %t
+// RUN: not %t malloc 2>&1 | FileCheck %s --check-prefix=CHECK-mCRASH
+// RUN: TSAN_OPTIONS=allocator_may_return_null=0 not %t malloc 2>&1 | FileCheck %s --check-prefix=CHECK-mCRASH
+// RUN: TSAN_OPTIONS=allocator_may_return_null=0 not %t calloc 2>&1 | FileCheck %s --check-prefix=CHECK-cCRASH
+// RUN: TSAN_OPTIONS=allocator_may_return_null=0 not %t calloc-overflow 2>&1 | FileCheck %s --check-prefix=CHECK-coCRASH
+// RUN: TSAN_OPTIONS=allocator_may_return_null=0 not %t realloc 2>&1 | FileCheck %s --check-prefix=CHECK-rCRASH
+// RUN: TSAN_OPTIONS=allocator_may_return_null=0 not %t realloc-after-malloc 2>&1 | FileCheck %s --check-prefix=CHECK-mrCRASH
+
+#include <limits.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <assert.h>
+#include <limits>
+int main(int argc, char **argv) {
+  volatile size_t size = std::numeric_limits<size_t>::max() - 10000;
+  assert(argc == 2);
+  char *x = 0;
+  if (!strcmp(argv[1], "malloc")) {
+    fprintf(stderr, "malloc:\n");
+    x = (char*)malloc(size);
+  }
+  if (!strcmp(argv[1], "calloc")) {
+    fprintf(stderr, "calloc:\n");
+    x = (char*)calloc(size / 4, 4);
+  }
+
+  if (!strcmp(argv[1], "calloc-overflow")) {
+    fprintf(stderr, "calloc-overflow:\n");
+    volatile size_t kMaxSizeT = std::numeric_limits<size_t>::max();
+    size_t kArraySize = 4096;
+    volatile size_t kArraySize2 = kMaxSizeT / kArraySize + 10;
+    x = (char*)calloc(kArraySize, kArraySize2);
+  }
+
+  if (!strcmp(argv[1], "realloc")) {
+    fprintf(stderr, "realloc:\n");
+    x = (char*)realloc(0, size);
+  }
+  if (!strcmp(argv[1], "realloc-after-malloc")) {
+    fprintf(stderr, "realloc-after-malloc:\n");
+    char *t = (char*)malloc(100);
+    *t = 42;
+    x = (char*)realloc(t, size);
+    assert(*t == 42);
+  }
+  fprintf(stderr, "x: %p\n", x);
+  return x != 0;
+}
+// CHECK-mCRASH: malloc:
+// CHECK-mCRASH: ThreadSanitizer's allocator is terminating the process
+// CHECK-cCRASH: calloc:
+// CHECK-cCRASH: ThreadSanitizer's allocator is terminating the process
+// CHECK-coCRASH: calloc-overflow:
+// CHECK-coCRASH: ThreadSanitizer's allocator is terminating the process
+// CHECK-rCRASH: realloc:
+// CHECK-rCRASH: ThreadSanitizer's allocator is terminating the process
+// CHECK-mrCRASH: realloc-after-malloc:
+// CHECK-mrCRASH: ThreadSanitizer's allocator is terminating the process
+