Merge "Add DwarfMemory class."

5 files changed, 841 insertions, 0 deletions

diff --git a/libunwindstack/Android.bp b/libunwindstack/Android.bp
index ece623b..dabeac1 100644
--- a/libunwindstack/Android.bp
+++ b/libunwindstack/Android.bp
@@ -47,6 +47,7 @@ cc_defaults {
 
     srcs: [
         "ArmExidx.cpp",
+        "DwarfMemory.cpp",
         "Elf.cpp",
         "ElfInterface.cpp",
         "ElfInterfaceArm.cpp",
@@ -87,6 +88,7 @@ cc_defaults {
     srcs: [
         "tests/ArmExidxDecodeTest.cpp",
         "tests/ArmExidxExtractTest.cpp",
+        "tests/DwarfMemoryTest.cpp",
         "tests/ElfInterfaceArmTest.cpp",
         "tests/ElfInterfaceTest.cpp",
         "tests/ElfTest.cpp",
diff --git a/libunwindstack/DwarfEncoding.h b/libunwindstack/DwarfEncoding.h
new file mode 100644
index 0000000..0ff3b8c
--- /dev/null
+++ b/libunwindstack/DwarfEncoding.h
@@ -0,0 +1,47 @@
+/*
+ * Copyright (C) 2016 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.
+ */
+
+#ifndef _LIBUNWINDSTACK_DWARF_ENCODING_H
+#define _LIBUNWINDSTACK_DWARF_ENCODING_H
+
+#include <stdint.h>
+
+enum DwarfEncoding : uint8_t {
+  DW_EH_PE_omit = 0xff,
+
+  DW_EH_PE_absptr = 0x00,
+  DW_EH_PE_uleb128 = 0x01,
+  DW_EH_PE_udata2 = 0x02,
+  DW_EH_PE_udata4 = 0x03,
+  DW_EH_PE_udata8 = 0x04,
+  DW_EH_PE_sleb128 = 0x09,
+  DW_EH_PE_sdata2 = 0x0a,
+  DW_EH_PE_sdata4 = 0x0b,
+  DW_EH_PE_sdata8 = 0x0c,
+
+  DW_EH_PE_pcrel = 0x10,
+  DW_EH_PE_textrel = 0x20,
+  DW_EH_PE_datarel = 0x30,
+  DW_EH_PE_funcrel = 0x40,
+  DW_EH_PE_aligned = 0x50,
+
+  // The following are special values used to encode CFA and OP operands.
+  DW_EH_PE_udata1 = 0x0d,
+  DW_EH_PE_sdata1 = 0x0e,
+  DW_EH_PE_block = 0x0f,
+};
+
+#endif  // _LIBUNWINDSTACK_DWARF_ENCODING_H
diff --git a/libunwindstack/DwarfMemory.cpp b/libunwindstack/DwarfMemory.cpp
new file mode 100644
index 0000000..11806ea
--- /dev/null
+++ b/libunwindstack/DwarfMemory.cpp
@@ -0,0 +1,248 @@
+/*
+ * 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 <assert.h>
+#include <stdint.h>
+
+#include <string>
+
+#include "DwarfEncoding.h"
+#include "DwarfMemory.h"
+#include "Memory.h"
+
+bool DwarfMemory::ReadBytes(void* dst, size_t num_bytes) {
+  if (!memory_->Read(cur_offset_, dst, num_bytes)) {
+    return false;
+  }
+  cur_offset_ += num_bytes;
+  return true;
+}
+
+template <typename SignedType>
+bool DwarfMemory::ReadSigned(uint64_t* value) {
+  SignedType signed_value;
+  if (!ReadBytes(&signed_value, sizeof(SignedType))) {
+    return false;
+  }
+  *value = static_cast<int64_t>(signed_value);
+  return true;
+}
+
+bool DwarfMemory::ReadULEB128(uint64_t* value) {
+  uint64_t cur_value = 0;
+  uint64_t shift = 0;
+  uint8_t byte;
+  do {
+    if (!ReadBytes(&byte, 1)) {
+      return false;
+    }
+    cur_value += static_cast<uint64_t>(byte & 0x7f) << shift;
+    shift += 7;
+  } while (byte & 0x80);
+  *value = cur_value;
+  return true;
+}
+
+bool DwarfMemory::ReadSLEB128(int64_t* value) {
+  uint64_t cur_value = 0;
+  uint64_t shift = 0;
+  uint8_t byte;
+  do {
+    if (!ReadBytes(&byte, 1)) {
+      return false;
+    }
+    cur_value += static_cast<uint64_t>(byte & 0x7f) << shift;
+    shift += 7;
+  } while (byte & 0x80);
+  if (byte & 0x40) {
+    // Negative value, need to sign extend.
+    cur_value |= static_cast<uint64_t>(-1) << shift;
+  }
+  *value = static_cast<int64_t>(cur_value);
+  return true;
+}
+
+template <typename AddressType>
+size_t DwarfMemory::GetEncodedSize(uint8_t encoding) {
+  switch (encoding & 0x0f) {
+    case DW_EH_PE_absptr:
+      return sizeof(AddressType);
+    case DW_EH_PE_udata1:
+    case DW_EH_PE_sdata1:
+      return 1;
+    case DW_EH_PE_udata2:
+    case DW_EH_PE_sdata2:
+      return 2;
+    case DW_EH_PE_udata4:
+    case DW_EH_PE_sdata4:
+      return 4;
+    case DW_EH_PE_udata8:
+    case DW_EH_PE_sdata8:
+      return 8;
+    case DW_EH_PE_uleb128:
+    case DW_EH_PE_sleb128:
+    default:
+      return 0;
+  }
+}
+
+bool DwarfMemory::AdjustEncodedValue(uint8_t encoding, uint64_t* value) {
+  assert((encoding & 0x0f) == 0);
+  assert(encoding != DW_EH_PE_aligned);
+
+  // Handle the encoding.
+  switch (encoding) {
+    case DW_EH_PE_absptr:
+      // Nothing to do.
+      break;
+    case DW_EH_PE_pcrel:
+      if (pc_offset_ == static_cast<uint64_t>(-1)) {
+        // Unsupported encoding.
+        return false;
+      }
+      *value += pc_offset_;
+      break;
+    case DW_EH_PE_textrel:
+      if (text_offset_ == static_cast<uint64_t>(-1)) {
+        // Unsupported encoding.
+        return false;
+      }
+      *value += text_offset_;
+      break;
+    case DW_EH_PE_datarel:
+      if (data_offset_ == static_cast<uint64_t>(-1)) {
+        // Unsupported encoding.
+        return false;
+      }
+      *value += data_offset_;
+      break;
+    case DW_EH_PE_funcrel:
+      if (func_offset_ == static_cast<uint64_t>(-1)) {
+        // Unsupported encoding.
+        return false;
+      }
+      *value += func_offset_;
+      break;
+    default:
+      return false;
+  }
+
+  return true;
+}
+
+template <typename AddressType>
+bool DwarfMemory::ReadEncodedValue(uint8_t encoding, uint64_t* value) {
+  if (encoding == DW_EH_PE_omit) {
+    *value = 0;
+    return true;
+  } else if (encoding == DW_EH_PE_aligned) {
+    if (__builtin_add_overflow(cur_offset_, sizeof(AddressType) - 1, &cur_offset_)) {
+      return false;
+    }
+    cur_offset_ &= -sizeof(AddressType);
+
+    if (sizeof(AddressType) != sizeof(uint64_t)) {
+      *value = 0;
+    }
+    return ReadBytes(value, sizeof(AddressType));
+  }
+
+  // Get the data.
+  switch (encoding & 0x0f) {
+    case DW_EH_PE_absptr:
+      if (sizeof(AddressType) != sizeof(uint64_t)) {
+        *value = 0;
+      }
+      if (!ReadBytes(value, sizeof(AddressType))) {
+        return false;
+      }
+      break;
+    case DW_EH_PE_uleb128:
+      if (!ReadULEB128(value)) {
+        return false;
+      }
+      break;
+    case DW_EH_PE_sleb128:
+      int64_t signed_value;
+      if (!ReadSLEB128(&signed_value)) {
+        return false;
+      }
+      *value = static_cast<uint64_t>(signed_value);
+      break;
+    case DW_EH_PE_udata1: {
+      uint8_t value8;
+      if (!ReadBytes(&value8, 1)) {
+        return false;
+      }
+      *value = value8;
+    } break;
+    case DW_EH_PE_sdata1:
+      if (!ReadSigned<int8_t>(value)) {
+        return false;
+      }
+      break;
+    case DW_EH_PE_udata2: {
+      uint16_t value16;
+      if (!ReadBytes(&value16, 2)) {
+        return false;
+      }
+      *value = value16;
+    } break;
+    case DW_EH_PE_sdata2:
+      if (!ReadSigned<int16_t>(value)) {
+        return false;
+      }
+      break;
+    case DW_EH_PE_udata4: {
+      uint32_t value32;
+      if (!ReadBytes(&value32, 4)) {
+        return false;
+      }
+      *value = value32;
+    } break;
+    case DW_EH_PE_sdata4:
+      if (!ReadSigned<int32_t>(value)) {
+        return false;
+      }
+      break;
+    case DW_EH_PE_udata8:
+      if (!ReadBytes(value, sizeof(uint64_t))) {
+        return false;
+      }
+      break;
+    case DW_EH_PE_sdata8:
+      if (!ReadSigned<int64_t>(value)) {
+        return false;
+      }
+      break;
+    default:
+      return false;
+  }
+
+  return AdjustEncodedValue(encoding & 0xf0, value);
+}
+
+// Instantiate all of the needed template functions.
+template bool DwarfMemory::ReadSigned<int8_t>(uint64_t*);
+template bool DwarfMemory::ReadSigned<int16_t>(uint64_t*);
+template bool DwarfMemory::ReadSigned<int32_t>(uint64_t*);
+template bool DwarfMemory::ReadSigned<int64_t>(uint64_t*);
+
+template size_t DwarfMemory::GetEncodedSize<uint32_t>(uint8_t);
+template size_t DwarfMemory::GetEncodedSize<uint64_t>(uint8_t);
+
+template bool DwarfMemory::ReadEncodedValue<uint32_t>(uint8_t, uint64_t*);
+template bool DwarfMemory::ReadEncodedValue<uint64_t>(uint8_t, uint64_t*);
diff --git a/libunwindstack/DwarfMemory.h b/libunwindstack/DwarfMemory.h
new file mode 100644
index 0000000..a304dd9
--- /dev/null
+++ b/libunwindstack/DwarfMemory.h
@@ -0,0 +1,72 @@
+/*
+ * Copyright (C) 2016 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.
+ */
+
+#ifndef _LIBUNWINDSTACK_DWARF_MEMORY_H
+#define _LIBUNWINDSTACK_DWARF_MEMORY_H
+
+#include <stdint.h>
+
+// Forward declarations.
+class Memory;
+
+class DwarfMemory {
+ public:
+  DwarfMemory(Memory* memory) : memory_(memory) {}
+  virtual ~DwarfMemory() = default;
+
+  bool ReadBytes(void* dst, size_t num_bytes);
+
+  template <typename SignedType>
+  bool ReadSigned(uint64_t* value);
+
+  bool ReadULEB128(uint64_t* value);
+
+  bool ReadSLEB128(int64_t* value);
+
+  template <typename AddressType>
+  size_t GetEncodedSize(uint8_t encoding);
+
+  bool AdjustEncodedValue(uint8_t encoding, uint64_t* value);
+
+  template <typename AddressType>
+  bool ReadEncodedValue(uint8_t encoding, uint64_t* value);
+
+  uint64_t cur_offset() { return cur_offset_; }
+  void set_cur_offset(uint64_t cur_offset) { cur_offset_ = cur_offset; }
+
+  void set_pc_offset(uint64_t offset) { pc_offset_ = offset; }
+  void clear_pc_offset() { pc_offset_ = static_cast<uint64_t>(-1); }
+
+  void set_data_offset(uint64_t offset) { data_offset_ = offset; }
+  void clear_data_offset() { data_offset_ = static_cast<uint64_t>(-1); }
+
+  void set_func_offset(uint64_t offset) { func_offset_ = offset; }
+  void clear_func_offset() { func_offset_ = static_cast<uint64_t>(-1); }
+
+  void set_text_offset(uint64_t offset) { text_offset_ = offset; }
+  void clear_text_offset() { text_offset_ = static_cast<uint64_t>(-1); }
+
+ private:
+  Memory* memory_;
+  uint64_t cur_offset_ = 0;
+
+  uint64_t pc_offset_ = static_cast<uint64_t>(-1);
+  uint64_t data_offset_ = static_cast<uint64_t>(-1);
+  uint64_t func_offset_ = static_cast<uint64_t>(-1);
+  uint64_t text_offset_ = static_cast<uint64_t>(-1);
+};
+
+#endif  // _LIBUNWINDSTACK_DWARF_MEMORY_H
diff --git a/libunwindstack/tests/DwarfMemoryTest.cpp b/libunwindstack/tests/DwarfMemoryTest.cpp
new file mode 100644
index 0000000..4877f36
--- /dev/null
+++ b/libunwindstack/tests/DwarfMemoryTest.cpp
@@ -0,0 +1,472 @@
+/*
+ * 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 <ios>
+#include <vector>
+
+#include <gtest/gtest.h>
+
+#include "DwarfMemory.h"
+
+#include "MemoryFake.h"
+
+class DwarfMemoryTest : public ::testing::Test {
+ protected:
+  void SetUp() override {
+    memory_.Clear();
+    dwarf_mem_.reset(new DwarfMemory(&memory_));
+  }
+
+  template <typename AddressType>
+  void GetEncodedSizeTest(uint8_t value, size_t expected);
+  template <typename AddressType>
+  void ReadEncodedValue_omit();
+  template <typename AddressType>
+  void ReadEncodedValue_leb128();
+  template <typename AddressType>
+  void ReadEncodedValue_data1();
+  template <typename AddressType>
+  void ReadEncodedValue_data2();
+  template <typename AddressType>
+  void ReadEncodedValue_data4();
+  template <typename AddressType>
+  void ReadEncodedValue_data8();
+  template <typename AddressType>
+  void ReadEncodedValue_non_zero_adjust();
+  template <typename AddressType>
+  void ReadEncodedValue_overflow();
+
+  MemoryFake memory_;
+  std::unique_ptr<DwarfMemory> dwarf_mem_;
+};
+
+TEST_F(DwarfMemoryTest, ReadBytes) {
+  memory_.SetMemory(0, std::vector<uint8_t>{0x10, 0x18, 0xff, 0xfe});
+
+  uint8_t byte;
+  ASSERT_TRUE(dwarf_mem_->ReadBytes(&byte, 1));
+  ASSERT_EQ(0x10U, byte);
+  ASSERT_TRUE(dwarf_mem_->ReadBytes(&byte, 1));
+  ASSERT_EQ(0x18U, byte);
+  ASSERT_TRUE(dwarf_mem_->ReadBytes(&byte, 1));
+  ASSERT_EQ(0xffU, byte);
+  ASSERT_TRUE(dwarf_mem_->ReadBytes(&byte, 1));
+  ASSERT_EQ(0xfeU, byte);
+  ASSERT_EQ(4U, dwarf_mem_->cur_offset());
+
+  dwarf_mem_->set_cur_offset(2);
+  ASSERT_TRUE(dwarf_mem_->ReadBytes(&byte, 1));
+  ASSERT_EQ(0xffU, byte);
+  ASSERT_EQ(3U, dwarf_mem_->cur_offset());
+}
+
+TEST_F(DwarfMemoryTest, ReadSigned_check) {
+  uint64_t value;
+
+  // Signed 8 byte reads.
+  memory_.SetData8(0, static_cast<uint8_t>(-10));
+  memory_.SetData8(1, 200);
+  ASSERT_TRUE(dwarf_mem_->ReadSigned<int8_t>(&value));
+  ASSERT_EQ(static_cast<int8_t>(-10), static_cast<int8_t>(value));
+  ASSERT_TRUE(dwarf_mem_->ReadSigned<int8_t>(&value));
+  ASSERT_EQ(static_cast<int8_t>(200), static_cast<int8_t>(value));
+
+  // Signed 16 byte reads.
+  memory_.SetData16(0x10, static_cast<uint16_t>(-1000));
+  memory_.SetData16(0x12, 50100);
+  dwarf_mem_->set_cur_offset(0x10);
+  ASSERT_TRUE(dwarf_mem_->ReadSigned<int16_t>(&value));
+  ASSERT_EQ(static_cast<int16_t>(-1000), static_cast<int16_t>(value));
+  ASSERT_TRUE(dwarf_mem_->ReadSigned<int16_t>(&value));
+  ASSERT_EQ(static_cast<int16_t>(50100), static_cast<int16_t>(value));
+
+  // Signed 32 byte reads.
+  memory_.SetData32(0x100, static_cast<uint32_t>(-1000000000));
+  memory_.SetData32(0x104, 3000000000);
+  dwarf_mem_->set_cur_offset(0x100);
+  ASSERT_TRUE(dwarf_mem_->ReadSigned<int32_t>(&value));
+  ASSERT_EQ(static_cast<int32_t>(-1000000000), static_cast<int32_t>(value));
+  ASSERT_TRUE(dwarf_mem_->ReadSigned<int32_t>(&value));
+  ASSERT_EQ(static_cast<int32_t>(3000000000), static_cast<int32_t>(value));
+
+  // Signed 64 byte reads.
+  memory_.SetData64(0x200, static_cast<uint64_t>(-2000000000000LL));
+  memory_.SetData64(0x208, 5000000000000LL);
+  dwarf_mem_->set_cur_offset(0x200);
+  ASSERT_TRUE(dwarf_mem_->ReadSigned<int64_t>(&value));
+  ASSERT_EQ(static_cast<int64_t>(-2000000000000), static_cast<int64_t>(value));
+  ASSERT_TRUE(dwarf_mem_->ReadSigned<int64_t>(&value));
+  ASSERT_EQ(static_cast<int64_t>(5000000000000), static_cast<int64_t>(value));
+}
+
+TEST_F(DwarfMemoryTest, ReadULEB128) {
+  memory_.SetMemory(0, std::vector<uint8_t>{0x01, 0x80, 0x24, 0xff, 0xc3, 0xff, 0x7f});
+
+  uint64_t value;
+  ASSERT_TRUE(dwarf_mem_->ReadULEB128(&value));
+  ASSERT_EQ(1U, dwarf_mem_->cur_offset());
+  ASSERT_EQ(1U, value);
+
+  ASSERT_TRUE(dwarf_mem_->ReadULEB128(&value));
+  ASSERT_EQ(3U, dwarf_mem_->cur_offset());
+  ASSERT_EQ(0x1200U, value);
+
+  ASSERT_TRUE(dwarf_mem_->ReadULEB128(&value));
+  ASSERT_EQ(7U, dwarf_mem_->cur_offset());
+  ASSERT_EQ(0xfffe1ffU, value);
+}
+
+TEST_F(DwarfMemoryTest, ReadSLEB128) {
+  memory_.SetMemory(0, std::vector<uint8_t>{0x06, 0x40, 0x82, 0x34, 0x89, 0x64, 0xf9, 0xc3, 0x8f,
+                                            0x2f, 0xbf, 0xc3, 0xf7, 0x5f});
+
+  int64_t value;
+  ASSERT_TRUE(dwarf_mem_->ReadSLEB128(&value));
+  ASSERT_EQ(1U, dwarf_mem_->cur_offset());
+  ASSERT_EQ(6U, value);
+
+  ASSERT_TRUE(dwarf_mem_->ReadSLEB128(&value));
+  ASSERT_EQ(2U, dwarf_mem_->cur_offset());
+  ASSERT_EQ(0xffffffffffffffc0ULL, static_cast<uint64_t>(value));
+
+  ASSERT_TRUE(dwarf_mem_->ReadSLEB128(&value));
+  ASSERT_EQ(4U, dwarf_mem_->cur_offset());
+  ASSERT_EQ(0x1a02U, value);
+
+  ASSERT_TRUE(dwarf_mem_->ReadSLEB128(&value));
+  ASSERT_EQ(6U, dwarf_mem_->cur_offset());
+  ASSERT_EQ(0xfffffffffffff209ULL, static_cast<uint64_t>(value));
+
+  ASSERT_TRUE(dwarf_mem_->ReadSLEB128(&value));
+  ASSERT_EQ(10U, dwarf_mem_->cur_offset());
+  ASSERT_EQ(0x5e3e1f9U, value);
+
+  ASSERT_TRUE(dwarf_mem_->ReadSLEB128(&value));
+  ASSERT_EQ(14U, dwarf_mem_->cur_offset());
+  ASSERT_EQ(0xfffffffffbfde1bfULL, static_cast<uint64_t>(value));
+}
+
+template <typename AddressType>
+void DwarfMemoryTest::GetEncodedSizeTest(uint8_t value, size_t expected) {
+  for (size_t i = 0; i < 16; i++) {
+    uint8_t encoding = (i << 4) | value;
+    ASSERT_EQ(expected, dwarf_mem_->GetEncodedSize<AddressType>(encoding))
+        << "encoding 0x" << std::hex << static_cast<uint32_t>(encoding) << " test value 0x"
+        << static_cast<size_t>(value);
+  }
+}
+
+TEST_F(DwarfMemoryTest, GetEncodedSize_absptr_uint32_t) {
+  GetEncodedSizeTest<uint32_t>(0, sizeof(uint32_t));
+}
+
+TEST_F(DwarfMemoryTest, GetEncodedSize_absptr_uint64_t) {
+  GetEncodedSizeTest<uint64_t>(0, sizeof(uint64_t));
+}
+
+TEST_F(DwarfMemoryTest, GetEncodedSize_data1) {
+  // udata1
+  GetEncodedSizeTest<uint32_t>(0x0d, 1);
+  GetEncodedSizeTest<uint64_t>(0x0d, 1);
+
+  // sdata1
+  GetEncodedSizeTest<uint32_t>(0x0e, 1);
+  GetEncodedSizeTest<uint64_t>(0x0e, 1);
+}
+
+TEST_F(DwarfMemoryTest, GetEncodedSize_data2) {
+  // udata2
+  GetEncodedSizeTest<uint32_t>(0x02, 2);
+  GetEncodedSizeTest<uint64_t>(0x02, 2);
+
+  // sdata2
+  GetEncodedSizeTest<uint32_t>(0x0a, 2);
+  GetEncodedSizeTest<uint64_t>(0x0a, 2);
+}
+
+TEST_F(DwarfMemoryTest, GetEncodedSize_data4) {
+  // udata4
+  GetEncodedSizeTest<uint32_t>(0x03, 4);
+  GetEncodedSizeTest<uint64_t>(0x03, 4);
+
+  // sdata4
+  GetEncodedSizeTest<uint32_t>(0x0b, 4);
+  GetEncodedSizeTest<uint64_t>(0x0b, 4);
+}
+
+TEST_F(DwarfMemoryTest, GetEncodedSize_data8) {
+  // udata8
+  GetEncodedSizeTest<uint32_t>(0x04, 8);
+  GetEncodedSizeTest<uint64_t>(0x04, 8);
+
+  // sdata8
+  GetEncodedSizeTest<uint32_t>(0x0c, 8);
+  GetEncodedSizeTest<uint64_t>(0x0c, 8);
+}
+
+TEST_F(DwarfMemoryTest, GetEncodedSize_unknown) {
+  GetEncodedSizeTest<uint32_t>(0x01, 0);
+  GetEncodedSizeTest<uint64_t>(0x01, 0);
+
+  GetEncodedSizeTest<uint32_t>(0x09, 0);
+  GetEncodedSizeTest<uint64_t>(0x09, 0);
+
+  GetEncodedSizeTest<uint32_t>(0x0f, 0);
+  GetEncodedSizeTest<uint64_t>(0x0f, 0);
+}
+
+template <typename AddressType>
+void DwarfMemoryTest::ReadEncodedValue_omit() {
+  uint64_t value = 123;
+  ASSERT_TRUE(dwarf_mem_->ReadEncodedValue<AddressType>(0xff, &value));
+  ASSERT_EQ(0U, value);
+}
+
+TEST_F(DwarfMemoryTest, ReadEncodedValue_omit_uint32_t) { ReadEncodedValue_omit<uint32_t>(); }
+
+TEST_F(DwarfMemoryTest, ReadEncodedValue_omit_uint64_t) { ReadEncodedValue_omit<uint64_t>(); }
+
+TEST_F(DwarfMemoryTest, ReadEncodedValue_absptr_uint32_t) {
+  uint64_t value = 100;
+  ASSERT_FALSE(dwarf_mem_->ReadEncodedValue<uint32_t>(0x00, &value));
+
+  memory_.SetData32(0, 0x12345678);
+
+  ASSERT_TRUE(dwarf_mem_->ReadEncodedValue<uint32_t>(0x00, &value));
+  ASSERT_EQ(4U, dwarf_mem_->cur_offset());
+  ASSERT_EQ(0x12345678U, value);
+}
+
+TEST_F(DwarfMemoryTest, ReadEncodedValue_absptr_uint64_t) {
+  uint64_t value = 100;
+  ASSERT_FALSE(dwarf_mem_->ReadEncodedValue<uint64_t>(0x00, &value));
+
+  memory_.SetData64(0, 0x12345678f1f2f3f4ULL);
+
+  ASSERT_TRUE(dwarf_mem_->ReadEncodedValue<uint64_t>(0x00, &value));
+  ASSERT_EQ(8U, dwarf_mem_->cur_offset());
+  ASSERT_EQ(0x12345678f1f2f3f4ULL, value);
+}
+
+TEST_F(DwarfMemoryTest, ReadEncodedValue_aligned_uint32_t) {
+  uint64_t value = 100;
+  dwarf_mem_->set_cur_offset(1);
+  ASSERT_FALSE(dwarf_mem_->ReadEncodedValue<uint32_t>(0x50, &value));
+
+  memory_.SetData32(4, 0x12345678);
+
+  ASSERT_TRUE(dwarf_mem_->ReadEncodedValue<uint32_t>(0x50, &value));
+  ASSERT_EQ(8U, dwarf_mem_->cur_offset());
+  ASSERT_EQ(0x12345678U, value);
+}
+
+TEST_F(DwarfMemoryTest, ReadEncodedValue_aligned_uint64_t) {
+  uint64_t value = 100;
+  dwarf_mem_->set_cur_offset(1);
+  ASSERT_FALSE(dwarf_mem_->ReadEncodedValue<uint64_t>(0x50, &value));
+
+  memory_.SetData64(8, 0x12345678f1f2f3f4ULL);
+
+  ASSERT_TRUE(dwarf_mem_->ReadEncodedValue<uint64_t>(0x50, &value));
+  ASSERT_EQ(16U, dwarf_mem_->cur_offset());
+  ASSERT_EQ(0x12345678f1f2f3f4ULL, value);
+}
+
+template <typename AddressType>
+void DwarfMemoryTest::ReadEncodedValue_leb128() {
+  memory_.SetMemory(0, std::vector<uint8_t>{0x80, 0x42});
+
+  uint64_t value = 100;
+  // uleb128
+  ASSERT_TRUE(dwarf_mem_->ReadEncodedValue<AddressType>(0x01, &value));
+  ASSERT_EQ(0x2100U, value);
+
+  dwarf_mem_->set_cur_offset(0);
+  // sleb128
+  ASSERT_TRUE(dwarf_mem_->ReadEncodedValue<AddressType>(0x09, &value));
+  ASSERT_EQ(0xffffffffffffe100ULL, value);
+}
+
+TEST_F(DwarfMemoryTest, ReadEncodedValue_leb128_uint32_t) { ReadEncodedValue_leb128<uint32_t>(); }
+
+TEST_F(DwarfMemoryTest, ReadEncodedValue_leb128_uint64_t) { ReadEncodedValue_leb128<uint64_t>(); }
+
+template <typename AddressType>
+void DwarfMemoryTest::ReadEncodedValue_data1() {
+  memory_.SetData8(0, 0xe0);
+
+  uint64_t value = 0;
+  ASSERT_TRUE(dwarf_mem_->ReadEncodedValue<AddressType>(0x0d, &value));
+  ASSERT_EQ(0xe0U, value);
+
+  dwarf_mem_->set_cur_offset(0);
+  ASSERT_TRUE(dwarf_mem_->ReadEncodedValue<AddressType>(0x0e, &value));
+  ASSERT_EQ(0xffffffffffffffe0ULL, value);
+}
+
+TEST_F(DwarfMemoryTest, ReadEncodedValue_data1_uint32_t) { ReadEncodedValue_data1<uint32_t>(); }
+
+TEST_F(DwarfMemoryTest, ReadEncodedValue_data1_uint64_t) { ReadEncodedValue_data1<uint64_t>(); }
+
+template <typename AddressType>
+void DwarfMemoryTest::ReadEncodedValue_data2() {
+  memory_.SetData16(0, 0xe000);
+
+  uint64_t value = 0;
+  ASSERT_TRUE(dwarf_mem_->ReadEncodedValue<AddressType>(0x02, &value));
+  ASSERT_EQ(0xe000U, value);
+
+  dwarf_mem_->set_cur_offset(0);
+  ASSERT_TRUE(dwarf_mem_->ReadEncodedValue<AddressType>(0x0a, &value));
+  ASSERT_EQ(0xffffffffffffe000ULL, value);
+}
+
+TEST_F(DwarfMemoryTest, ReadEncodedValue_data2_uint32_t) { ReadEncodedValue_data2<uint32_t>(); }
+
+TEST_F(DwarfMemoryTest, ReadEncodedValue_data2_uint64_t) { ReadEncodedValue_data2<uint64_t>(); }
+
+template <typename AddressType>
+void DwarfMemoryTest::ReadEncodedValue_data4() {
+  memory_.SetData32(0, 0xe0000000);
+
+  uint64_t value = 0;
+  ASSERT_TRUE(dwarf_mem_->ReadEncodedValue<AddressType>(0x03, &value));
+  ASSERT_EQ(0xe0000000U, value);
+
+  dwarf_mem_->set_cur_offset(0);
+  ASSERT_TRUE(dwarf_mem_->ReadEncodedValue<AddressType>(0x0b, &value));
+  ASSERT_EQ(0xffffffffe0000000ULL, value);
+}
+
+TEST_F(DwarfMemoryTest, ReadEncodedValue_data4_uint32_t) { ReadEncodedValue_data4<uint32_t>(); }
+
+TEST_F(DwarfMemoryTest, ReadEncodedValue_data4_uint64_t) { ReadEncodedValue_data4<uint64_t>(); }
+
+template <typename AddressType>
+void DwarfMemoryTest::ReadEncodedValue_data8() {
+  memory_.SetData64(0, 0xe000000000000000ULL);
+
+  uint64_t value = 0;
+  ASSERT_TRUE(dwarf_mem_->ReadEncodedValue<AddressType>(0x04, &value));
+  ASSERT_EQ(0xe000000000000000ULL, value);
+
+  dwarf_mem_->set_cur_offset(0);
+  ASSERT_TRUE(dwarf_mem_->ReadEncodedValue<AddressType>(0x0c, &value));
+  ASSERT_EQ(0xe000000000000000ULL, value);
+}
+
+TEST_F(DwarfMemoryTest, ReadEncodedValue_data8_uint32_t) { ReadEncodedValue_data8<uint32_t>(); }
+
+TEST_F(DwarfMemoryTest, ReadEncodedValue_data8_uint64_t) { ReadEncodedValue_data8<uint64_t>(); }
+
+template <typename AddressType>
+void DwarfMemoryTest::ReadEncodedValue_non_zero_adjust() {
+  memory_.SetData64(0, 0xe000000000000000ULL);
+
+  uint64_t value = 0;
+  dwarf_mem_->set_pc_offset(0x2000);
+  ASSERT_TRUE(dwarf_mem_->ReadEncodedValue<AddressType>(0x14, &value));
+  ASSERT_EQ(0xe000000000002000ULL, value);
+}
+
+TEST_F(DwarfMemoryTest, ReadEncodedValue_non_zero_adjust_uint32_t) {
+  ReadEncodedValue_non_zero_adjust<uint32_t>();
+}
+
+TEST_F(DwarfMemoryTest, ReadEncodedValue_non_zero_adjust_uint64_t) {
+  ReadEncodedValue_non_zero_adjust<uint64_t>();
+}
+
+template <typename AddressType>
+void DwarfMemoryTest::ReadEncodedValue_overflow() {
+  memory_.SetData64(0, 0);
+
+  uint64_t value = 0;
+  dwarf_mem_->set_cur_offset(UINT64_MAX);
+  ASSERT_FALSE(dwarf_mem_->ReadEncodedValue<AddressType>(0x50, &value));
+}
+
+TEST_F(DwarfMemoryTest, ReadEncodedValue_overflow_uint32_t) {
+  ReadEncodedValue_overflow<uint32_t>();
+}
+
+TEST_F(DwarfMemoryTest, ReadEncodedValue_overflow_uint64_t) {
+  ReadEncodedValue_overflow<uint64_t>();
+}
+
+TEST_F(DwarfMemoryTest, AdjustEncodedValue_absptr) {
+  uint64_t value = 0x1234;
+  ASSERT_TRUE(dwarf_mem_->AdjustEncodedValue(0x00, &value));
+  ASSERT_EQ(0x1234U, value);
+}
+
+TEST_F(DwarfMemoryTest, AdjustEncodedValue_pcrel) {
+  uint64_t value = 0x1234;
+  ASSERT_FALSE(dwarf_mem_->AdjustEncodedValue(0x10, &value));
+
+  dwarf_mem_->set_pc_offset(0x2000);
+  ASSERT_TRUE(dwarf_mem_->AdjustEncodedValue(0x10, &value));
+  ASSERT_EQ(0x3234U, value);
+
+  dwarf_mem_->set_pc_offset(static_cast<uint64_t>(-4));
+  value = 0x1234;
+  ASSERT_TRUE(dwarf_mem_->AdjustEncodedValue(0x10, &value));
+  ASSERT_EQ(0x1230U, value);
+}
+
+TEST_F(DwarfMemoryTest, AdjustEncodedValue_textrel) {
+  uint64_t value = 0x8234;
+  ASSERT_FALSE(dwarf_mem_->AdjustEncodedValue(0x20, &value));
+
+  dwarf_mem_->set_text_offset(0x1000);
+  ASSERT_TRUE(dwarf_mem_->AdjustEncodedValue(0x20, &value));
+  ASSERT_EQ(0x9234U, value);
+
+  dwarf_mem_->set_text_offset(static_cast<uint64_t>(-16));
+  value = 0x8234;
+  ASSERT_TRUE(dwarf_mem_->AdjustEncodedValue(0x20, &value));
+  ASSERT_EQ(0x8224U, value);
+}
+
+TEST_F(DwarfMemoryTest, AdjustEncodedValue_datarel) {
+  uint64_t value = 0xb234;
+  ASSERT_FALSE(dwarf_mem_->AdjustEncodedValue(0x30, &value));
+
+  dwarf_mem_->set_data_offset(0x1200);
+  ASSERT_TRUE(dwarf_mem_->AdjustEncodedValue(0x30, &value));
+  ASSERT_EQ(0xc434U, value);
+
+  dwarf_mem_->set_data_offset(static_cast<uint64_t>(-256));
+  value = 0xb234;
+  ASSERT_TRUE(dwarf_mem_->AdjustEncodedValue(0x30, &value));
+  ASSERT_EQ(0xb134U, value);
+}
+
+TEST_F(DwarfMemoryTest, AdjustEncodedValue_funcrel) {
+  uint64_t value = 0x15234;
+  ASSERT_FALSE(dwarf_mem_->AdjustEncodedValue(0x40, &value));
+
+  dwarf_mem_->set_func_offset(0x60000);
+  ASSERT_TRUE(dwarf_mem_->AdjustEncodedValue(0x40, &value));
+  ASSERT_EQ(0x75234U, value);
+
+  dwarf_mem_->set_func_offset(static_cast<uint64_t>(-4096));
+  value = 0x15234;
+  ASSERT_TRUE(dwarf_mem_->AdjustEncodedValue(0x40, &value));
+  ASSERT_EQ(0x14234U, value);
+}