Extend relocation packing to cover arm64.

tools/relocation_packer/src/sleb128_unittest.cc

Index: tools/relocation_packer/src/sleb128_unittest.cc
diff --git a/tools/relocation_packer/src/sleb128_unittest.cc b/tools/relocation_packer/src/sleb128_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..60a5d0de712d7df0db1d8bed7faf8ee7eedef933
--- /dev/null
+++ b/tools/relocation_packer/src/sleb128_unittest.cc
@@ -0,0 +1,166 @@
+// 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 "sleb128.h"
+
+#include <vector>
+#include "elf_traits.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace relocation_packer {
+
+TEST(Sleb128, Encoder) {
+  std::vector<ELF::Sxword> values;
+  values.push_back(624485);
+  values.push_back(0);
+  values.push_back(1);
+  values.push_back(63);
+  values.push_back(64);
+  values.push_back(-1);
+  values.push_back(-624485);
+
+  Sleb128Encoder encoder;
+  encoder.EnqueueAll(values);
+
+  encoder.Enqueue(2147483647);
+  encoder.Enqueue(-2147483648);
+  encoder.Enqueue(9223372036854775807ll);
+  encoder.Enqueue(-9223372036854775807ll - 1);
+
+  std::vector<uint8_t> encoding;
+  encoder.GetEncoding(&encoding);
+
+  EXPECT_EQ(42u, 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]);
+  // 63
+  EXPECT_EQ(0x3f, encoding[5]);
+  // 64
+  EXPECT_EQ(0xc0, encoding[6]);
+  EXPECT_EQ(0x00, encoding[7]);
+  // -1
+  EXPECT_EQ(0x7f, encoding[8]);
+  // -624485
+  EXPECT_EQ(0x9b, encoding[9]);
+  EXPECT_EQ(0xf1, encoding[10]);
+  EXPECT_EQ(0x59, encoding[11]);
+  // 2147483647
+  EXPECT_EQ(0xff, encoding[12]);
+  EXPECT_EQ(0xff, encoding[13]);
+  EXPECT_EQ(0xff, encoding[14]);
+  EXPECT_EQ(0xff, encoding[15]);
+  EXPECT_EQ(0x07, encoding[16]);
+  // -2147483648
+  EXPECT_EQ(0x80, encoding[17]);
+  EXPECT_EQ(0x80, encoding[18]);
+  EXPECT_EQ(0x80, encoding[19]);
+  EXPECT_EQ(0x80, encoding[20]);
+  EXPECT_EQ(0x78, encoding[21]);
+  // 9223372036854775807
+  EXPECT_EQ(0xff, encoding[22]);
+  EXPECT_EQ(0xff, encoding[23]);
+  EXPECT_EQ(0xff, encoding[24]);
+  EXPECT_EQ(0xff, encoding[25]);
+  EXPECT_EQ(0xff, encoding[26]);
+  EXPECT_EQ(0xff, encoding[27]);
+  EXPECT_EQ(0xff, encoding[28]);
+  EXPECT_EQ(0xff, encoding[29]);
+  EXPECT_EQ(0xff, encoding[30]);
+  EXPECT_EQ(0x00, encoding[31]);
+  // -9223372036854775808
+  EXPECT_EQ(0x80, encoding[32]);
+  EXPECT_EQ(0x80, encoding[33]);
+  EXPECT_EQ(0x80, encoding[34]);
+  EXPECT_EQ(0x80, encoding[35]);
+  EXPECT_EQ(0x80, encoding[36]);
+  EXPECT_EQ(0x80, encoding[37]);
+  EXPECT_EQ(0x80, encoding[38]);
+  EXPECT_EQ(0x80, encoding[39]);
+  EXPECT_EQ(0x80, encoding[40]);
+  EXPECT_EQ(0x7f, encoding[41]);
+}
+
+TEST(Sleb128, 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);
+  // 63
+  encoding.push_back(0x3f);
+  // 64
+  encoding.push_back(0xc0);
+  encoding.push_back(0x00);
+  // -1
+  encoding.push_back(0x7f);
+  // -624485
+  encoding.push_back(0x9b);
+  encoding.push_back(0xf1);
+  encoding.push_back(0x59);
+  // 2147483647
+  encoding.push_back(0xff);
+  encoding.push_back(0xff);
+  encoding.push_back(0xff);
+  encoding.push_back(0xff);
+  encoding.push_back(0x07);
+  // -2147483648
+  encoding.push_back(0x80);
+  encoding.push_back(0x80);
+  encoding.push_back(0x80);
+  encoding.push_back(0x80);
+  encoding.push_back(0x78);
+  // 9223372036854775807
+  encoding.push_back(0xff);
+  encoding.push_back(0xff);
+  encoding.push_back(0xff);
+  encoding.push_back(0xff);
+  encoding.push_back(0xff);
+  encoding.push_back(0xff);
+  encoding.push_back(0xff);
+  encoding.push_back(0xff);
+  encoding.push_back(0xff);
+  encoding.push_back(0x00);
+  // -9223372036854775808
+  encoding.push_back(0x80);
+  encoding.push_back(0x80);
+  encoding.push_back(0x80);
+  encoding.push_back(0x80);
+  encoding.push_back(0x80);
+  encoding.push_back(0x80);
+  encoding.push_back(0x80);
+  encoding.push_back(0x80);
+  encoding.push_back(0x80);
+  encoding.push_back(0x7f);
+
+  Sleb128Decoder decoder(encoding);
+
+  EXPECT_EQ(624485, decoder.Dequeue());
+
+  std::vector<ELF::Sxword> dequeued;
+  decoder.DequeueAll(&dequeued);
+
+  EXPECT_EQ(10u, dequeued.size());
+  EXPECT_EQ(0, dequeued[0]);
+  EXPECT_EQ(1, dequeued[1]);
+  EXPECT_EQ(63, dequeued[2]);
+  EXPECT_EQ(64, dequeued[3]);
+  EXPECT_EQ(-1, dequeued[4]);
+  EXPECT_EQ(-624485, dequeued[5]);
+  EXPECT_EQ(2147483647, dequeued[6]);
+  EXPECT_EQ(-2147483648, dequeued[7]);
+  EXPECT_EQ(9223372036854775807ll, dequeued[8]);
+  EXPECT_EQ(-9223372036854775807ll - 1, dequeued[9]);
+}
+
+}  // namespace relocation_packer