New version of unwinder.

Bug: 23762183

Test: All unit tests pass.
Change-Id: I0ac69e55af56e1142c0a1ee3715cdc48f2ed3ec3
diff --git a/libunwindstack/tests/RegsTest.cpp b/libunwindstack/tests/RegsTest.cpp
new file mode 100644
index 0000000..f9e8b0e
--- /dev/null
+++ b/libunwindstack/tests/RegsTest.cpp
@@ -0,0 +1,67 @@
+/*
+ * Copyright (C) 2017 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 <stdint.h>
+
+#include <gtest/gtest.h>
+
+#include "Regs.h"
+
+class RegsTest : public ::testing::Test {};
+
+TEST_F(RegsTest, regs32) {
+  Regs32 regs32(10, 20, 30);
+
+  ASSERT_EQ(10U, regs32.pc_reg());
+  ASSERT_EQ(20U, regs32.sp_reg());
+  ASSERT_EQ(30U, regs32.total_regs());
+
+  uint32_t* raw = reinterpret_cast<uint32_t*>(regs32.raw_data());
+  for (size_t i = 0; i < 30; i++) {
+    raw[i] = 0xf0000000 + i;
+  }
+
+  ASSERT_EQ(0xf000000aU, regs32.pc());
+  ASSERT_EQ(0xf0000014U, regs32.sp());
+
+  ASSERT_EQ(0xf0000001U, regs32[1]);
+  regs32[1] = 10;
+  ASSERT_EQ(10U, regs32[1]);
+
+  ASSERT_EQ(0xf000001dU, regs32[29]);
+}
+
+TEST_F(RegsTest, regs64) {
+  Regs64 regs64(10, 20, 30);
+
+  ASSERT_EQ(10U, regs64.pc_reg());
+  ASSERT_EQ(20U, regs64.sp_reg());
+  ASSERT_EQ(30U, regs64.total_regs());
+
+  uint64_t* raw = reinterpret_cast<uint64_t*>(regs64.raw_data());
+  for (size_t i = 0; i < 30; i++) {
+    raw[i] = 0xf123456780000000UL + i;
+  }
+
+  ASSERT_EQ(0xf12345678000000aUL, regs64.pc());
+  ASSERT_EQ(0xf123456780000014UL, regs64.sp());
+
+  ASSERT_EQ(0xf123456780000008U, regs64[8]);
+  regs64[8] = 10;
+  ASSERT_EQ(10U, regs64[8]);
+
+  ASSERT_EQ(0xf12345678000001dU, regs64[29]);
+}