vendor/compiler-rt/compiler-rt-trunk-r301939

1 files changed, 19 insertions, 0 deletions

diff --git a/test/asan/TestCases/Linux/global-overflow-lld.cc b/test/asan/TestCases/Linux/global-overflow-lld.cc
new file mode 100644
index 000000000000..f4d0bc977604
--- /dev/null
+++ b/test/asan/TestCases/Linux/global-overflow-lld.cc
@@ -0,0 +1,19 @@
+// Test that gc-sections-friendly instrumentation of globals does not introduce
+// false negatives with the LLD linker.
+// RUN: %clangxx_asan -fuse-ld=lld -Wl,-gc-sections -ffunction-sections -fdata-sections -O0 %s -o %t && not %run %t 2>&1 | FileCheck %s
+// REQUIRES: lld
+
+#include <string.h>
+int main(int argc, char **argv) {
+  static char XXX[10];
+  static char YYY[10];
+  static char ZZZ[10];
+  memset(XXX, 0, 10);
+  memset(YYY, 0, 10);
+  memset(ZZZ, 0, 10);
+  int res = YYY[argc * 10];  // BOOOM
+  // CHECK: {{READ of size 1 at}}
+  // CHECK: {{located 0 bytes to the right of global variable}}
+  res += XXX[argc] + ZZZ[argc];
+  return res;
+}