First round of dead file removal

obsolete/breakpad/common/linux/file_id.cc

Index: obsolete/breakpad/common/linux/file_id.cc
diff --git a/obsolete/breakpad/common/linux/file_id.cc b/obsolete/breakpad/common/linux/file_id.cc
deleted file mode 100644
index 8fae273a6e1f1d6fe15b0bdae5f5d6bfb010937f..0000000000000000000000000000000000000000
--- a/obsolete/breakpad/common/linux/file_id.cc
+++ /dev/null
@@ -1,179 +0,0 @@
-// Copyright (c) 2006, Google Inc.
-// All rights reserved.
-//
-// Redistribution and use in source and binary forms, with or without
-// modification, are permitted provided that the following conditions are
-// met:
-//
-//     * Redistributions of source code must retain the above copyright
-// notice, this list of conditions and the following disclaimer.
-//     * Redistributions in binary form must reproduce the above
-// copyright notice, this list of conditions and the following disclaimer
-// in the documentation and/or other materials provided with the
-// distribution.
-//     * Neither the name of Google Inc. nor the names of its
-// contributors may be used to endorse or promote products derived from
-// this software without specific prior written permission.
-//
-// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-//
-// file_id.cc: Return a unique identifier for a file
-//
-// See file_id.h for documentation
-//
-
-#include "common/linux/file_id.h"
-#include "common/linux/linux_libc_support.h"
-#include "common/linux/linux_syscall_support.h"
-
-#include <arpa/inet.h>
-#include <elf.h>
-#include <fcntl.h>
-#include <link.h>
-#include <string.h>
-#include <sys/mman.h>
-#include <unistd.h>
-
-#include <algorithm>
-#include <cassert>
-#include <cstdio>
-
-namespace google_breakpad {
-
-FileID::FileID(const char* path) {
-  strncpy(path_, path, sizeof(path_));
-}
-
-// These two functions are also used inside the crashed process, so be safe
-// and use the syscall/libc wrappers instead of direct syscalls or libc.
-  static bool FindElfTextSection(const void *elf_mapped_base,
-                                 const void **text_start,
-                                 int *text_size) {
-  assert(elf_mapped_base);
-  assert(text_start);
-  assert(text_size);
-
-  const char* elf_base =
-    static_cast<const char*>(elf_mapped_base);
-  const ElfW(Ehdr)* elf_header =
-    reinterpret_cast<const ElfW(Ehdr)*>(elf_base);
-  if (my_strncmp(elf_base, ELFMAG, SELFMAG) != 0)
-    return false;
-#if __ELF_NATIVE_CLASS == 32
-#define ELFCLASS ELFCLASS32
-#else
-#define ELFCLASS ELFCLASS64
-#endif
-  //TODO: support dumping 32-bit binaries from a 64-bit dump_syms?
-  if (elf_header->e_ident[EI_CLASS] != ELFCLASS)
-    return false;
-  *text_start = NULL;
-  *text_size = 0;
-  const ElfW(Shdr)* sections =
-    reinterpret_cast<const ElfW(Shdr)*>(elf_base + elf_header->e_shoff);
-  const char* text_section_name = ".text";
-  int name_len = my_strlen(text_section_name);
-  const ElfW(Shdr)* string_section = sections + elf_header->e_shstrndx;
-  const ElfW(Shdr)* text_section = NULL;
-  for (int i = 0; i < elf_header->e_shnum; ++i) {
-    if (sections[i].sh_type == SHT_PROGBITS) {
-      const char* section_name = (char*)(elf_base +
-                                         string_section->sh_offset +
-                                         sections[i].sh_name);
-      if (!my_strncmp(section_name, text_section_name, name_len)) {
-        text_section = &sections[i];
-        break;
-      }
-    }
-  }
-  if (text_section != NULL && text_section->sh_size > 0) {
-    *text_start = elf_base + text_section->sh_offset;
-    *text_size = text_section->sh_size;
-  }
-  return true;
-}
-
-// static
-bool FileID::ElfFileIdentifierFromMappedFile(void* base,
-                                             uint8_t identifier[kMDGUIDSize])
-{
-  const void* text_section = NULL;
-  int text_size = 0;
-  bool success = false;
-  if (FindElfTextSection(base, &text_section, &text_size) && (text_size > 0)) {
-    my_memset(identifier, 0, kMDGUIDSize);
-    const uint8_t* ptr = reinterpret_cast<const uint8_t*>(text_section);
-    const uint8_t* ptr_end = ptr + std::min(text_size, 4096);
-    while (ptr < ptr_end) {
-      for (unsigned i = 0; i < kMDGUIDSize; i++)
-        identifier[i] ^= ptr[i];
-      ptr += kMDGUIDSize;
-    }
-    success = true;
-  }
-  return success;
-}
-
-bool FileID::ElfFileIdentifier(uint8_t identifier[kMDGUIDSize]) {
-  int fd = open(path_, O_RDONLY);
-  if (fd < 0)
-    return false;
-  struct stat st;
-  if (fstat(fd, &st) != 0) {
-    close(fd);
-    return false;
-  }
-  void* base = mmap(NULL, st.st_size,
-                    PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
-  close(fd);
-  if (base == MAP_FAILED)
-    return false;
-
-  bool success = ElfFileIdentifierFromMappedFile(base, identifier);
-  munmap(base, st.st_size);
-  return success;
-}
-
-// static
-void FileID::ConvertIdentifierToString(const uint8_t identifier[kMDGUIDSize],
-                                       char* buffer, int buffer_length) {
-  uint8_t identifier_swapped[kMDGUIDSize];
-
-  // Endian-ness swap to match dump processor expectation.
-  memcpy(identifier_swapped, identifier, kMDGUIDSize);
-  uint32_t* data1 = reinterpret_cast<uint32_t*>(identifier_swapped);
-  *data1 = htonl(*data1);
-  uint16_t* data2 = reinterpret_cast<uint16_t*>(identifier_swapped + 4);
-  *data2 = htons(*data2);
-  uint16_t* data3 = reinterpret_cast<uint16_t*>(identifier_swapped + 6);
-  *data3 = htons(*data3);
-
-  int buffer_idx = 0;
-  for (unsigned int idx = 0;
-       (buffer_idx < buffer_length) && (idx < kMDGUIDSize);
-       ++idx) {
-    int hi = (identifier_swapped[idx] >> 4) & 0x0F;
-    int lo = (identifier_swapped[idx]) & 0x0F;
-
-    if (idx == 4 || idx == 6 || idx == 8 || idx == 10)
-      buffer[buffer_idx++] = '-';
-
-    buffer[buffer_idx++] = (hi >= 10) ? 'A' + hi - 10 : '0' + hi;
-    buffer[buffer_idx++] = (lo >= 10) ? 'A' + lo - 10 : '0' + lo;
-  }
-
-  // NULL terminate
-  buffer[(buffer_idx < buffer_length) ? buffer_idx : buffer_idx - 1] = 0;
-}
-
-}  // namespace google_breakpad