ASan: add new interface functions - __asan_(un)poison_stack_memory. Calls to these functions are inserted by the instrumentation pass in use-after-scope mode
git-svn-id: https://llvm.org/svn/llvm-project/compiler-rt/trunk@169201 91177308-0d34-0410-b5e6-96231b3b80d8
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 0000000..c192bc2
--- /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's stack:
+ // CHECK: {{\[}}[[OFFSET]], {{.*}}) 'x.i'
+}