Emit unwinding information for TurboFan code.

test/cctest/compiler/test-run-unwinding-info.cc

Index: test/cctest/compiler/test-run-unwinding-info.cc
diff --git a/test/cctest/compiler/test-run-unwinding-info.cc b/test/cctest/compiler/test-run-unwinding-info.cc
new file mode 100644
index 0000000000000000000000000000000000000000..4536725d4fe8dcd96f9b5a327d417d42eb7ef5ff
--- /dev/null
+++ b/test/cctest/compiler/test-run-unwinding-info.cc
@@ -0,0 +1,58 @@
+// Copyright 2016 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// Test enabled only on supported architectures.
+#if defined(V8_TARGET_ARCH_X64) || defined(V8_TARGET_ARCH_ARM) || \
+    defined(V8_TARGET_ARCH_ARM64)
+
+#include "test/cctest/compiler/function-tester.h"
+
+namespace v8 {
+namespace internal {
+namespace compiler {
+
+TEST(RunUnwindingInfo) {
+  FLAG_turbo = true;
+  FLAG_perf_prof_unwinding_info = true;
+
+  FunctionTester tester(
+      "(function (x) {\n"
+      "  function f(x) { return x*x; }\n"
+      "  return x > 0 ? x+1 : f(x);\n"
+      "})");
+
+  tester.Call(tester.Val(-1));
+
+  CHECK(tester.function->code()->has_unwinding_info());
+}
+
+// TODO(ssanfilippo) Build low-level graph and check that state is correctly
+// restored in the following situation:
+//
+//                         +-----------------+
+//                         |     no frame    |---+
+//  check that a           +-----------------+   |
+//  a noframe state        | construct frame |<--+
+//  is restored here  -->  +-----------------+   |
+//                         | construct frame |<--+
+//                         +-----------------+
+//
+// Same for <construct>/<destruct>/<destruct> (a <construct> status is restored)
+
+// TODO(ssanfilippo) Intentionally reach a BB with different initial states
+// and check that the UnwindingInforWriter fails in debug mode:
+//
+//      +----------------+
+//  +---|     State A    |
+//  |   +----------------+
+//  |   |  State B != A  |---+
+//  |   +----------------+   |
+//  +-->|  Failure here  |<--+
+//      +----------------+
+
+}  // namespace compiler
+}  // namespace internal
+}  // namespace v8
+
+#endif