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-rw-r--r--test/asan/TestCases/alloca_constant_size.cc51
1 files changed, 51 insertions, 0 deletions
diff --git a/test/asan/TestCases/alloca_constant_size.cc b/test/asan/TestCases/alloca_constant_size.cc
new file mode 100644
index 000000000000..61f6da710116
--- /dev/null
+++ b/test/asan/TestCases/alloca_constant_size.cc
@@ -0,0 +1,51 @@
+// Regression test for https://github.com/google/sanitizers/issues/691
+
+// RUN: %clangxx_asan -O0 %s -o %t -fstack-protector
+// RUN: %run %t 1 2>&1 | FileCheck %s
+// RUN: %run %t 2 2>&1 | FileCheck %s
+
+#include <stdio.h>
+#include <string.h>
+
+// MSVC provides _alloca instead of alloca.
+#if defined(_MSC_VER) && !defined(alloca)
+# define alloca _alloca
+#else
+#include <alloca.h>
+#endif
+
+
+void f1_alloca() {
+ char *dynamic_buffer = (char *)alloca(200);
+ fprintf(stderr, "dynamic_buffer = %p\n", dynamic_buffer);
+ memset(dynamic_buffer, 'y', 200);
+ return;
+}
+
+static const int kDynamicArraySize = 200;
+
+void f1_vla() {
+ char dynamic_buffer[kDynamicArraySize];
+ fprintf(stderr, "dynamic_buffer = %p\n", dynamic_buffer);
+ memset(dynamic_buffer, 'y', kDynamicArraySize);
+ return;
+}
+
+void f2() {
+ char buf[1024];
+ memset(buf, 'x', 1024);
+}
+
+int main(int argc, const char *argv[]) {
+ if (!strcmp(argv[1], "1")) {
+ f1_alloca();
+ } else if (!strcmp(argv[1], "2")) {
+ f1_vla();
+ }
+ f2();
+ fprintf(stderr, "Done.\n");
+ return 0;
+}
+
+// CHECK-NOT: ERROR: AddressSanitizer
+// CHECK: Done.