Add a host tool to pack R_ARM_RELATIVE relocations in libchrome.<ver>.so.

tools/relocation_packer/src/leb128_unittest.cc

+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "leb128.h"
+
+#include <vector>
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace relocation_packer {
+
+TEST(Leb128, Encoder) {
+  std::vector<uint32_t> values;
+  values.push_back(624485u);
+  values.push_back(0u);
+  values.push_back(1u);
+  values.push_back(127u);
+  values.push_back(128u);
+
+  Leb128Encoder encoder;
+  encoder.EnqueueAll(values);
+
+  std::vector<uint8_t> encoding;
+  encoder.GetEncoding(&encoding);
+
+  EXPECT_EQ(8u, encoding.size());
+  // 624485
+  EXPECT_EQ(0xe5, encoding[0]);
+  EXPECT_EQ(0x8e, encoding[1]);
+  EXPECT_EQ(0x26, encoding[2]);
+  // 0
+  EXPECT_EQ(0x00, encoding[3]);
+  // 1
+  EXPECT_EQ(0x01, encoding[4]);
+  // 127
+  EXPECT_EQ(0x7f, encoding[5]);
+  // 128
+  EXPECT_EQ(0x80, encoding[6]);
+  EXPECT_EQ(0x01, encoding[7]);
+
+  encoder.Enqueue(4294967295u);
+
+  encoding.clear();
+  encoder.GetEncoding(&encoding);
+
+  EXPECT_EQ(13u, encoding.size());
+  // 4294967295
+  EXPECT_EQ(0xff, encoding[8]);
+  EXPECT_EQ(0xff, encoding[9]);
+  EXPECT_EQ(0xff, encoding[10]);
+  EXPECT_EQ(0xff, encoding[11]);
+  EXPECT_EQ(0x0f, encoding[12]);
+}
+
+TEST(Leb128, Decoder) {
+  std::vector<uint8_t> encoding;
+  // 624485
+  encoding.push_back(0xe5);
+  encoding.push_back(0x8e);
+  encoding.push_back(0x26);
+  // 0
+  encoding.push_back(0x00);
+  // 1
+  encoding.push_back(0x01);
+  // 127
+  encoding.push_back(0x7f);
+  // 128
+  encoding.push_back(0x80);
+  encoding.push_back(0x01);
+  // 4294967295
+  encoding.push_back(0xff);
+  encoding.push_back(0xff);
+  encoding.push_back(0xff);
+  encoding.push_back(0xff);
+  encoding.push_back(0x0f);
+
+  Leb128Decoder decoder(encoding);
+
+  EXPECT_EQ(624485u, decoder.Dequeue());
+
+  std::vector<uint32_t> dequeued;
+  decoder.DequeueAll(&dequeued);
+
+  EXPECT_EQ(5u, dequeued.size());
+  EXPECT_EQ(0u, dequeued[0]);
+  EXPECT_EQ(1u, dequeued[1]);
+  EXPECT_EQ(127u, dequeued[2]);
+  EXPECT_EQ(128u, dequeued[3]);
+  EXPECT_EQ(4294967295u, dequeued[4]);
+}
+
+}  // namespace relocation_packer