1 files changed, 61 insertions, 0 deletions
diff --git a/test/scudo/sizes.cpp b/test/scudo/sizes.cpp
new file mode 100644
index 000000000..7190cb64f
--- /dev/null
+++ b/test/scudo/sizes.cpp
@@ -0,0 +1,61 @@
+// RUN: %clang_scudo %s -o %t
+// RUN: SCUDO_OPTIONS=allocator_may_return_null=0 not %run %t malloc 2>&1 | FileCheck %s
+// RUN: SCUDO_OPTIONS=allocator_may_return_null=1     %run %t malloc 2>&1
+// RUN: SCUDO_OPTIONS=allocator_may_return_null=0 not %run %t calloc 2>&1 | FileCheck %s
+// RUN: SCUDO_OPTIONS=allocator_may_return_null=1     %run %t calloc 2>&1
+// RUN:                                               %run %t usable 2>&1
+
+// Tests for various edge cases related to sizes, notably the maximum size the
+// allocator can allocate. Tests that an integer overflow in the parameters of
+// calloc is caught.
+
+#include <assert.h>
+#include <malloc.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <limits>
+
+int main(int argc, char **argv)
+{
+  assert(argc == 2);
+  if (!strcmp(argv[1], "malloc")) {
+    // Currently the maximum size the allocator can allocate is 1ULL<<40 bytes.
+    size_t size = std::numeric_limits<size_t>::max();
+    void *p = malloc(size);
+    if (p)
+      return 1;
+    size = (1ULL << 40) - 16;
+    p = malloc(size);
+    if (p)
+      return 1;
+  }
+  if (!strcmp(argv[1], "calloc")) {
+    // Trigger an overflow in calloc.
+    size_t size = std::numeric_limits<size_t>::max();
+    void *p = calloc((size / 0x1000) + 1, 0x1000);
+    if (p)
+      return 1;
+  }
+  if (!strcmp(argv[1], "usable")) {
+    // Playing with the actual usable size of a chunk.
+    void *p = malloc(1007);
+    if (!p)
+      return 1;
+    size_t size = malloc_usable_size(p);
+    if (size < 1007)
+      return 1;
+    memset(p, 'A', size);
+    p = realloc(p, 2014);
+    if (!p)
+      return 1;
+    size = malloc_usable_size(p);
+    if (size < 2014)
+      return 1;
+    memset(p, 'B', size);
+    free(p);
+  }
+  return 0;
+}
+
+// CHECK: allocator is terminating the process