vendor/compiler-rt/compiler-rt-r172839

1 files changed, 29 insertions, 0 deletions

diff --git a/lib/asan/lit_tests/use-after-scope-inlined.cc b/lib/asan/lit_tests/use-after-scope-inlined.cc
new file mode 100644
index 000000000000..3d730de6ab35
--- /dev/null
+++ b/lib/asan/lit_tests/use-after-scope-inlined.cc
@@ -0,0 +1,29 @@
+// Test with "-O2" only to make sure inlining (leading to use-after-scope)
+// happens. "always_inline" is not enough, as Clang doesn't emit
+// llvm.lifetime intrinsics at -O0.
+//
+// RUN: %clangxx_asan -m64 -O2 -fsanitize=use-after-scope %s -o %t && \
+// RUN:     %t 2>&1 | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m32 -O2 -fsanitize=use-after-scope %s -o %t && \
+// RUN:     %t 2>&1 | %symbolize | FileCheck %s
+
+int *arr;
+
+__attribute__((always_inline))
+void inlined(int arg) {
+  int x[5];
+  for (int i = 0; i < arg; i++) x[i] = i;
+  arr = x;
+}
+
+int main(int argc, char *argv[]) {
+  inlined(argc);
+  return arr[argc - 1];  // BOOM
+  // CHECK: ERROR: AddressSanitizer: stack-use-after-scope
+  // CHECK: READ of size 4 at 0x{{.*}} thread T0
+  // CHECK:   #0 0x{{.*}} in {{_?}}main
+  // CHECK:      {{.*}}use-after-scope-inlined.cc:[[@LINE-4]]
+  // CHECK: Address 0x{{.*}} is located at offset
+  // CHECK:      [[OFFSET:[^ ]*]] in frame <main> of T0{{.*}}:
+  // CHECK:   {{\[}}[[OFFSET]], {{.*}}) 'x.i'
+}