1 files changed, 95 insertions, 0 deletions
diff --git a/simpleperf/cmd_debug_unwind_test.cpp b/simpleperf/cmd_debug_unwind_test.cpp
new file mode 100644
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--- /dev/null
+++ b/simpleperf/cmd_debug_unwind_test.cpp
@@ -0,0 +1,95 @@
+/*
+ * Copyright (C) 2018 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <gtest/gtest.h>
+
+#include <unistd.h>
+
+#include <memory>
+#include <string>
+#include <vector>
+
+#include <android-base/file.h>
+#include <android-base/test_utils.h>
+
+#include "command.h"
+#include "get_test_data.h"
+#include "test_util.h"
+
+#if defined(__aarch64__)
+static std::unique_ptr<Command> DebugUnwindCmd() {
+  return CreateCommandInstance("debug-unwind");
+}
+
+class CaptureStdout {
+ public:
+  CaptureStdout() : started_(false) {}
+
+  ~CaptureStdout() {
+    if (started_) {
+      Finish();
+    }
+  }
+
+  bool Start() {
+    old_stdout_ = dup(STDOUT_FILENO);
+    if (old_stdout_ == -1) {
+      return false;
+    }
+    started_ = true;
+    tmpfile_.reset(new TemporaryFile);
+    if (dup2(tmpfile_->fd, STDOUT_FILENO) == -1) {
+      return false;
+    }
+    return true;
+  }
+
+  std::string Finish() {
+    started_ = false;
+    dup2(old_stdout_, STDOUT_FILENO);
+    close(old_stdout_);
+    std::string s;
+    if (!android::base::ReadFileToString(tmpfile_->path, &s)) {
+      return "";
+    }
+    return s;
+  }
+
+ private:
+  bool started_;
+  int old_stdout_;
+  std::unique_ptr<TemporaryFile> tmpfile_;
+};
+#endif  // defined(__aarch64__)
+
+TEST(cmd_debug_unwind, smoke) {
+  // TODO: Remove the arch limitation once using cross-platform unwinding in the new unwinder.
+#if defined(__aarch64__)
+  std::string input_data = GetTestData(PERF_DATA_NO_UNWIND);
+  CaptureStdout capture;
+  TemporaryFile tmp_file;
+  ASSERT_TRUE(capture.Start());
+  ASSERT_TRUE(DebugUnwindCmd()->Run({"-i", input_data, "-o", tmp_file.path}));
+  ASSERT_NE(capture.Finish().find("Unwinding sample count: 8"), std::string::npos);
+
+  ASSERT_TRUE(capture.Start());
+  ASSERT_TRUE(DebugUnwindCmd()->Run({"-i", input_data, "-o", tmp_file.path, "--time",
+                                     "1516379654300997"}));
+  ASSERT_NE(capture.Finish().find("Unwinding sample count: 1"), std::string::npos);
+#else
+  GTEST_LOG_(INFO) << "This test does nothing on non-ARM64 devices.";
+#endif
+}