[Zucchini] Move Zucchini from /chrome/installer/ to /components/.

(Use "git log --follow" to see older revisions of files).

/components/ is the most logical place to put Zucchini, which only
depends on /base and /testing/gtest. This move also enables Zucchini to
be used by the Component Updater. Details:
- Move all files; run the following to change deps and guards:
  sed 's/chrome\/installer/components/' *.cc *.h -i
  sed 's/CHROME_INSTALLER/COMPONENTS/' *.cc *.h -i
  - Sorting works out pretty well!
- Change all 'chrome/installer/zucchini' to 'components/zucchini'
  throughout other parts of the repo; sort if necessary.
- Fix 6 'git cl lint' errors.
- Change 1 Bind() usage to BindRepeated().
- Update OWNER.

Bug: 729154
Change-Id: I50c5a7d411ea85f707b5994ab319dfb2a1acccf7
Reviewed-on: https://chromium-review.googlesource.com/954923
Reviewed-by: Greg Thompson <grt@chromium.org>
Reviewed-by: Jochen Eisinger <jochen@chromium.org>
Reviewed-by: Samuel Huang <huangs@chromium.org>
Commit-Queue: Samuel Huang <huangs@chromium.org>
Cr-Commit-Position: refs/heads/master@{#542857}
NOKEYCHECK=True
GitOrigin-RevId: 577ef6c435e8d43be6e3e60ccbcbd1881780f4ec

1 files changed, 129 insertions, 0 deletions

diff --git a/disassembler_win32.h b/disassembler_win32.h
new file mode 100644
index 0000000..8e410ee
--- /dev/null
+++ b/disassembler_win32.h
@@ -0,0 +1,129 @@
+// Copyright 2017 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.
+
+#ifndef COMPONENTS_ZUCCHINI_DISASSEMBLER_WIN32_H_
+#define COMPONENTS_ZUCCHINI_DISASSEMBLER_WIN32_H_
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include <memory>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "base/macros.h"
+#include "components/zucchini/address_translator.h"
+#include "components/zucchini/buffer_view.h"
+#include "components/zucchini/disassembler.h"
+#include "components/zucchini/image_utils.h"
+#include "components/zucchini/type_win_pe.h"
+
+namespace zucchini {
+
+class Rel32FinderX86;
+class Rel32FinderX64;
+
+struct Win32X86Traits {
+  static constexpr Bitness kBitness = kBit32;
+  static constexpr ExecutableType kExeType = kExeTypeWin32X86;
+  enum : uint16_t { kMagic = 0x10B };
+  enum : uint16_t { kRelocType = 3 };
+  enum : offset_t { kVAWidth = 4 };
+  static const char kExeTypeString[];
+
+  using ImageOptionalHeader = pe::ImageOptionalHeader;
+  using RelFinder = Rel32FinderX86;
+  using Address = uint32_t;
+};
+
+struct Win32X64Traits {
+  static constexpr Bitness kBitness = kBit64;
+  static constexpr ExecutableType kExeType = kExeTypeWin32X64;
+  enum : uint16_t { kMagic = 0x20B };
+  enum : uint16_t { kRelocType = 10 };
+  enum : offset_t { kVAWidth = 8 };
+  static const char kExeTypeString[];
+
+  using ImageOptionalHeader = pe::ImageOptionalHeader64;
+  using RelFinder = Rel32FinderX64;
+  using Address = uint64_t;
+};
+
+template <class Traits>
+class DisassemblerWin32 : public Disassembler {
+ public:
+  enum ReferenceType : uint8_t { kReloc, kAbs32, kRel32, kTypeCount };
+
+  // Applies quick checks to determine whether |image| *may* point to the start
+  // of an executable. Returns true iff the check passes.
+  static bool QuickDetect(ConstBufferView image);
+
+  DisassemblerWin32();
+  ~DisassemblerWin32() override;
+
+  // Disassembler:
+  ExecutableType GetExeType() const override;
+  std::string GetExeTypeString() const override;
+  std::vector<ReferenceGroup> MakeReferenceGroups() const override;
+
+  // Functions that return reader / writer for references.
+  std::unique_ptr<ReferenceReader> MakeReadRelocs(offset_t lo, offset_t hi);
+  std::unique_ptr<ReferenceReader> MakeReadAbs32(offset_t lo, offset_t hi);
+  std::unique_ptr<ReferenceReader> MakeReadRel32(offset_t lo, offset_t hi);
+  std::unique_ptr<ReferenceWriter> MakeWriteRelocs(MutableBufferView image);
+  std::unique_ptr<ReferenceWriter> MakeWriteAbs32(MutableBufferView image);
+  std::unique_ptr<ReferenceWriter> MakeWriteRel32(MutableBufferView image);
+
+ private:
+  friend Disassembler;
+
+  // Disassembler:
+  bool Parse(ConstBufferView image) override;
+
+  // Parses the file header. Returns true iff successful.
+  bool ParseHeader();
+
+  // Parsers to extract references. These are lazily called, and return whether
+  // parsing was successful (failures are non-fatal).
+  bool ParseAndStoreRelocBlocks();
+  bool ParseAndStoreAbs32();
+  bool ParseAndStoreRel32();
+
+  // In-memory copy of sections.
+  std::vector<pe::ImageSectionHeader> sections_;
+
+  // Image base address to translate between RVA and VA.
+  typename Traits::Address image_base_ = 0;
+
+  // Pointer to data Directory entry of the relocation table.
+  const pe::ImageDataDirectory* base_relocation_table_ = nullptr;
+
+  // Translator between offsets and RVAs.
+  AddressTranslator translator_;
+
+  // Reference storage.
+  BufferRegion reloc_region_;
+  std::vector<offset_t> reloc_block_offsets_;
+  offset_t reloc_end_ = 0;
+  std::vector<offset_t> abs32_locations_;
+  std::vector<offset_t> rel32_locations_;
+
+  // Initialization states of reference storage, used for lazy initialization.
+  // TODO(huangs): Investigate whether lazy initialization is useful for memory
+  // reduction. This is a carryover from Courgette. To be sure we should run
+  // experiment after Zucchini is able to do ensemble patching.
+  bool has_parsed_relocs_ = false;
+  bool has_parsed_abs32_ = false;
+  bool has_parsed_rel32_ = false;
+
+  DISALLOW_COPY_AND_ASSIGN(DisassemblerWin32);
+};
+
+using DisassemblerWin32X86 = DisassemblerWin32<Win32X86Traits>;
+using DisassemblerWin32X64 = DisassemblerWin32<Win32X64Traits>;
+
+}  // namespace zucchini
+
+#endif  // COMPONENTS_ZUCCHINI_DISASSEMBLER_WIN32_H_