[asan] added tests for asan-initialization-order, patch by Reid Watson

llvm-svn: 163207

1 files changed, 33 insertions, 0 deletions

diff --git a/compiler-rt/lib/asan/lit_tests/initialization-bug.cc b/compiler-rt/lib/asan/lit_tests/initialization-bug.cc
new file mode 100644
index 00000000000..872b8bff8fd
--- /dev/null
+++ b/compiler-rt/lib/asan/lit_tests/initialization-bug.cc
@@ -0,0 +1,33 @@
+// Test to make sure basic initialization order errors are caught.
+
+// RUN: %clangxx_asan -m64 -O0 %s %p/Helpers/initialization-bug-extra.cc\
+// RUN:   -mllvm -asan-initialization-order -o %t && %t 2>&1 \
+// RUN:    | %symbolize | FileCheck %s
+// RUN: %clangxx_asan -m32 -O0 %s %p/Helpers/initialization-bug-extra.cc\
+// RUN:   -mllvm -asan-initialization-order -o %t && %t 2>&1 \
+// RUN:     | %symbolize | FileCheck %s
+
+// Do not test with optimization -- the error may be optimized away.
+
+extern int y;
+
+// 'y' is a dynamically initialized global residing in a different TU.  This
+// dynamic initializer will read the value of 'y' before main starts.  The
+// result is undefined behavior, which should be caught by initialization order
+// checking.
+int __attribute__((noinline)) initX() {
+  return y + 1;
+  // CHECK: {{AddressSanitizer initialization-order-fiasco}}
+  // CHECK: {{READ of size .* at 0x.* thread T0}}
+  // CHECK: {{#0 0x.* in .*initX.* .*initialization-bug.cc:19}}
+  // CHECK: {{0x.* is located 0 bytes inside of global variable .*y.*}}
+}
+
+
+// This initializer begins our initialization order problems.
+static int x = initX();
+
+// ASan should have caused an exit before main runs.
+int main() {
+  return -1;
+}