* Added breakpad support for Linux.

thirdparty/breakpad/common/linux/dump_symbols.cc

@@ -0,0 +1,824 @@
+// Copyright (c) 2010 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.
+
+// Restructured in 2009 by: Jim Blandy <jimb@mozilla.com> <jimb@red-bean.com>
+
+// dump_symbols.cc: implement google_breakpad::WriteSymbolFile:
+// Find all the debugging info in a file and dump it as a Breakpad symbol file.
+
+#include "common/linux/dump_symbols.h"
+
+#include <assert.h>
+#include <elf.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <link.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include <iostream>
+#include <set>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "common/dwarf/bytereader-inl.h"
+#include "common/dwarf/dwarf2diehandler.h"
+#include "common/dwarf_cfi_to_module.h"
+#include "common/dwarf_cu_to_module.h"
+#include "common/dwarf_line_to_module.h"
+#include "common/linux/elf_symbols_to_module.h"
+#include "common/linux/file_id.h"
+#include "common/module.h"
+#include "common/stabs_reader.h"
+#include "common/stabs_to_module.h"
+
+// This namespace contains helper functions.
+namespace {
+
+using google_breakpad::DwarfCFIToModule;
+using google_breakpad::DwarfCUToModule;
+using google_breakpad::DwarfLineToModule;
+using google_breakpad::Module;
+using google_breakpad::StabsToModule;
+
+//
+// FDWrapper
+//
+// Wrapper class to make sure opened file is closed.
+//
+class FDWrapper {
+ public:
+  explicit FDWrapper(int fd) :
+    fd_(fd) {}
+  ~FDWrapper() {
+    if (fd_ != -1)
+      close(fd_);
+  }
+  int get() {
+    return fd_;
+  }
+  int release() {
+    int fd = fd_;
+    fd_ = -1;
+    return fd;
+  }
+ private:
+  int fd_;
+};
+
+//
+// MmapWrapper
+//
+// Wrapper class to make sure mapped regions are unmapped.
+//
+class MmapWrapper {
+ public:
+  MmapWrapper() : is_set_(false) {}
+  ~MmapWrapper() {
+    assert(is_set_);
+    if (base_ != NULL) {
+      assert(size_ > 0);
+      munmap(base_, size_);
+    }
+  }
+  void set(void *mapped_address, size_t mapped_size) {
+    is_set_ = true;
+    base_ = mapped_address;
+    size_ = mapped_size;
+  }
+  void release() {
+    assert(is_set_);
+    base_ = NULL;
+    size_ = 0;
+  }
+
+ private:
+  bool is_set_;
+  void *base_;
+  size_t size_;
+};
+
+
+// Fix offset into virtual address by adding the mapped base into offsets.
+// Make life easier when want to find something by offset.
+static void FixAddress(void *obj_base) {
+  ElfW(Addr) base = reinterpret_cast<ElfW(Addr)>(obj_base);
+  ElfW(Ehdr) *elf_header = static_cast<ElfW(Ehdr) *>(obj_base);
+  elf_header->e_phoff += base;
+  elf_header->e_shoff += base;
+  ElfW(Shdr) *sections = reinterpret_cast<ElfW(Shdr) *>(elf_header->e_shoff);
+  for (int i = 0; i < elf_header->e_shnum; ++i)
+    sections[i].sh_offset += base;
+}
+
+// Find the preferred loading address of the binary.
+static ElfW(Addr) GetLoadingAddress(const ElfW(Phdr) *program_headers,
+                                    int nheader) {
+  for (int i = 0; i < nheader; ++i) {
+    const ElfW(Phdr) &header = program_headers[i];
+    // For executable, it is the PT_LOAD segment with offset to zero.
+    if (header.p_type == PT_LOAD &&
+        header.p_offset == 0)
+      return header.p_vaddr;
+  }
+  // For other types of ELF, return 0.
+  return 0;
+}
+
+static bool IsValidElf(const ElfW(Ehdr) *elf_header) {
+  return memcmp(elf_header, ELFMAG, SELFMAG) == 0;
+}
+
+static const ElfW(Shdr) *FindSectionByName(const char *name,
+                                           const ElfW(Shdr) *sections,
+                                           const ElfW(Shdr) *section_names,
+                                           int nsection) {
+  assert(name != NULL);
+  assert(sections != NULL);
+  assert(nsection > 0);
+
+  int name_len = strlen(name);
+  if (name_len == 0)
+    return NULL;
+
+  // Find the end of the section name section, to make sure that
+  // comparisons don't run off the end of the section.
+  const char *names_end =
+    reinterpret_cast<char*>(section_names->sh_offset + section_names->sh_size);
+
+  for (int i = 0; i < nsection; ++i) {
+    const char *section_name =
+      reinterpret_cast<char*>(section_names->sh_offset + sections[i].sh_name);
+    if (names_end - section_name >= name_len + 1 &&
+        strcmp(name, section_name) == 0) {
+      if (sections[i].sh_type == SHT_NOBITS) {
+        fprintf(stderr,
+                "Section %s found, but ignored because type=SHT_NOBITS.\n",
+                name);
+        return NULL;
+      }
+      return sections + i;
+    }
+  }
+  return NULL;
+}
+
+static bool LoadStabs(const ElfW(Ehdr) *elf_header,
+                      const ElfW(Shdr) *stab_section,
+                      const ElfW(Shdr) *stabstr_section,
+                      const bool big_endian,
+                      Module *module) {
+  // A callback object to handle data from the STABS reader.
+  StabsToModule handler(module);
+  // Find the addresses of the STABS data, and create a STABS reader object.
+  // On Linux, STABS entries always have 32-bit values, regardless of the
+  // address size of the architecture whose code they're describing, and
+  // the strings are always "unitized".
+  uint8_t *stabs = reinterpret_cast<uint8_t *>(stab_section->sh_offset);
+  uint8_t *stabstr = reinterpret_cast<uint8_t *>(stabstr_section->sh_offset);
+  google_breakpad::StabsReader reader(stabs, stab_section->sh_size,
+                                      stabstr, stabstr_section->sh_size,
+                                      big_endian, 4, true, &handler);
+  // Read the STABS data, and do post-processing.
+  if (!reader.Process())
+    return false;
+  handler.Finalize();
+  return true;
+}
+
+// A line-to-module loader that accepts line number info parsed by
+// dwarf2reader::LineInfo and populates a Module and a line vector
+// with the results.
+class DumperLineToModule: public DwarfCUToModule::LineToModuleFunctor {
+ public:
+  // Create a line-to-module converter using BYTE_READER.
+  explicit DumperLineToModule(dwarf2reader::ByteReader *byte_reader)
+      : byte_reader_(byte_reader) { }
+  void operator()(const char *program, uint64 length,
+                  Module *module, vector<Module::Line> *lines) {
+    DwarfLineToModule handler(module, lines);
+    dwarf2reader::LineInfo parser(program, length, byte_reader_, &handler);
+    parser.Start();
+  }
+ private:
+  dwarf2reader::ByteReader *byte_reader_;
+};
+
+static bool LoadDwarf(const string &dwarf_filename,
+                      const ElfW(Ehdr) *elf_header,
+                      const bool big_endian,
+                      Module *module) {
+  const dwarf2reader::Endianness endianness = big_endian ?
+      dwarf2reader::ENDIANNESS_BIG : dwarf2reader::ENDIANNESS_LITTLE;
+  dwarf2reader::ByteReader byte_reader(endianness);
+
+  // Construct a context for this file.
+  DwarfCUToModule::FileContext file_context(dwarf_filename, module);
+
+  // Build a map of the ELF file's sections.
+  const ElfW(Shdr) *sections
+      = reinterpret_cast<ElfW(Shdr) *>(elf_header->e_shoff);
+  int num_sections = elf_header->e_shnum;
+  const ElfW(Shdr) *section_names = sections + elf_header->e_shstrndx;
+  for (int i = 0; i < num_sections; i++) {
+    const ElfW(Shdr) *section = &sections[i];
+    string name = reinterpret_cast<const char *>(section_names->sh_offset
+                                                 + section->sh_name);
+    const char *contents = reinterpret_cast<const char *>(section->sh_offset);
+    uint64 length = section->sh_size;
+    file_context.section_map[name] = std::make_pair(contents, length);
+  }
+
+  // Parse all the compilation units in the .debug_info section.
+  DumperLineToModule line_to_module(&byte_reader);
+  std::pair<const char *, uint64> debug_info_section
+      = file_context.section_map[".debug_info"];
+  // We should never have been called if the file doesn't have a
+  // .debug_info section.
+  assert(debug_info_section.first);
+  uint64 debug_info_length = debug_info_section.second;
+  for (uint64 offset = 0; offset < debug_info_length;) {
+    // Make a handler for the root DIE that populates MODULE with the
+    // data we find.
+    DwarfCUToModule::WarningReporter reporter(dwarf_filename, offset);
+    DwarfCUToModule root_handler(&file_context, &line_to_module, &reporter);
+    // Make a Dwarf2Handler that drives our DIEHandler.
+    dwarf2reader::DIEDispatcher die_dispatcher(&root_handler);
+    // Make a DWARF parser for the compilation unit at OFFSET.
+    dwarf2reader::CompilationUnit reader(file_context.section_map,
+                                         offset,
+                                         &byte_reader,
+                                         &die_dispatcher);
+    // Process the entire compilation unit; get the offset of the next.
+    offset += reader.Start();
+  }
+  return true;
+}
+
+// Fill REGISTER_NAMES with the register names appropriate to the
+// machine architecture given in HEADER, indexed by the register
+// numbers used in DWARF call frame information. Return true on
+// success, or false if we don't recognize HEADER's machine
+// architecture.
+static bool DwarfCFIRegisterNames(const ElfW(Ehdr) *elf_header,
+                                  vector<string> *register_names) {
+  switch (elf_header->e_machine) {
+    case EM_386:
+      *register_names = DwarfCFIToModule::RegisterNames::I386();
+      return true;
+    case EM_ARM:
+      *register_names = DwarfCFIToModule::RegisterNames::ARM();
+      return true;
+    case EM_X86_64:
+      *register_names = DwarfCFIToModule::RegisterNames::X86_64();
+      return true;
+    default:
+      return false;
+  }
+}
+
+static bool LoadDwarfCFI(const string &dwarf_filename,
+                         const ElfW(Ehdr) *elf_header,
+                         const char *section_name,
+                         const ElfW(Shdr) *section,
+                         const bool eh_frame,
+                         const ElfW(Shdr) *got_section,
+                         const ElfW(Shdr) *text_section,
+                         const bool big_endian,
+                         Module *module) {
+  // Find the appropriate set of register names for this file's
+  // architecture.
+  vector<string> register_names;
+  if (!DwarfCFIRegisterNames(elf_header, &register_names)) {
+    fprintf(stderr, "%s: unrecognized ELF machine architecture '%d';"
+            " cannot convert DWARF call frame information\n",
+            dwarf_filename.c_str(), elf_header->e_machine);
+    return false;
+  }
+
+  const dwarf2reader::Endianness endianness = big_endian ?
+      dwarf2reader::ENDIANNESS_BIG : dwarf2reader::ENDIANNESS_LITTLE;
+
+  // Find the call frame information and its size.
+  const char *cfi = reinterpret_cast<const char *>(section->sh_offset);
+  size_t cfi_size = section->sh_size;
+
+  // Plug together the parser, handler, and their entourages.
+  DwarfCFIToModule::Reporter module_reporter(dwarf_filename, section_name);
+  DwarfCFIToModule handler(module, register_names, &module_reporter);
+  dwarf2reader::ByteReader byte_reader(endianness);
+  // Since we're using the ElfW macro, we're not actually capable of
+  // processing both ELF32 and ELF64 files with the same program; that
+  // would take a bit more work. But this will work out well enough.
+  if (elf_header->e_ident[EI_CLASS] == ELFCLASS32)
+    byte_reader.SetAddressSize(4);
+  else if (elf_header->e_ident[EI_CLASS] == ELFCLASS64)
+    byte_reader.SetAddressSize(8);
+  else {
+    fprintf(stderr, "%s: bad file class in ELF header: %d\n",
+            dwarf_filename.c_str(), elf_header->e_ident[EI_CLASS]);
+    return false;
+  }
+  // Provide the base addresses for .eh_frame encoded pointers, if
+  // possible.
+  byte_reader.SetCFIDataBase(section->sh_addr, cfi);
+  if (got_section)
+    byte_reader.SetDataBase(got_section->sh_addr);
+  if (text_section)
+    byte_reader.SetTextBase(text_section->sh_addr);
+
+  dwarf2reader::CallFrameInfo::Reporter dwarf_reporter(dwarf_filename,
+                                                       section_name);
+  dwarf2reader::CallFrameInfo parser(cfi, cfi_size,
+                                     &byte_reader, &handler, &dwarf_reporter,
+                                     eh_frame);
+  parser.Start();
+  return true;
+}
+
+bool LoadELF(const std::string &obj_file, MmapWrapper* map_wrapper,
+             ElfW(Ehdr) **elf_header) {
+  int obj_fd = open(obj_file.c_str(), O_RDONLY);
+  if (obj_fd < 0) {
+    fprintf(stderr, "Failed to open ELF file '%s': %s\n",
+            obj_file.c_str(), strerror(errno));
+    return false;
+  }
+  FDWrapper obj_fd_wrapper(obj_fd);
+  struct stat st;
+  if (fstat(obj_fd, &st) != 0 && st.st_size <= 0) {
+    fprintf(stderr, "Unable to fstat ELF file '%s': %s\n",
+            obj_file.c_str(), strerror(errno));
+    return false;
+  }
+  void *obj_base = mmap(NULL, st.st_size,
+                        PROT_READ | PROT_WRITE, MAP_PRIVATE, obj_fd, 0);
+  if (obj_base == MAP_FAILED) {
+    fprintf(stderr, "Failed to mmap ELF file '%s': %s\n",
+            obj_file.c_str(), strerror(errno));
+    return false;
+  }
+  map_wrapper->set(obj_base, st.st_size);
+  *elf_header = reinterpret_cast<ElfW(Ehdr) *>(obj_base);
+  if (!IsValidElf(*elf_header)) {
+    fprintf(stderr, "Not a valid ELF file: %s\n", obj_file.c_str());
+    return false;
+  }
+  return true;
+}
+
+// Get the endianness of ELF_HEADER. If it's invalid, return false.
+bool ElfEndianness(const ElfW(Ehdr) *elf_header, bool *big_endian) {
+  if (elf_header->e_ident[EI_DATA] == ELFDATA2LSB) {
+    *big_endian = false;
+    return true;
+  }
+  if (elf_header->e_ident[EI_DATA] == ELFDATA2MSB) {
+    *big_endian = true;
+    return true;
+  }
+
+  fprintf(stderr, "bad data encoding in ELF header: %d\n",
+          elf_header->e_ident[EI_DATA]);
+  return false;
+}
+
+// Read the .gnu_debuglink and get the debug file name. If anything goes
+// wrong, return an empty string.
+static std::string ReadDebugLink(const ElfW(Shdr) *debuglink_section,
+                                 const std::string &obj_file,
+                                 const std::string &debug_dir) {
+  char *debuglink = reinterpret_cast<char *>(debuglink_section->sh_offset);
+  size_t debuglink_len = strlen(debuglink) + 5;  // '\0' + CRC32.
+  debuglink_len = 4 * ((debuglink_len + 3) / 4);  // Round to nearest 4 bytes.
+
+  // Sanity check.
+  if (debuglink_len != debuglink_section->sh_size) {
+    fprintf(stderr, "Mismatched .gnu_debuglink string / section size: "
+            "%zx %zx\n", debuglink_len, debuglink_section->sh_size);
+    return "";
+  }
+
+  std::string debuglink_path = debug_dir + "/" + debuglink;
+  int debuglink_fd = open(debuglink_path.c_str(), O_RDONLY);
+  if (debuglink_fd < 0) {
+    fprintf(stderr, "Failed to open debug ELF file '%s' for '%s': %s\n",
+            debuglink_path.c_str(), obj_file.c_str(), strerror(errno));
+    return "";
+  }
+  FDWrapper debuglink_fd_wrapper(debuglink_fd);
+  // TODO(thestig) check the CRC-32 at the end of the .gnu_debuglink
+  // section.
+
+  return debuglink_path;
+}
+
+//
+// LoadSymbolsInfo
+//
+// Holds the state between the two calls to LoadSymbols() in case we have to
+// follow the .gnu_debuglink section and load debug information from a
+// different file.
+//
+class LoadSymbolsInfo {
+ public:
+  explicit LoadSymbolsInfo(const std::string &dbg_dir) :
+    debug_dir_(dbg_dir),
+    has_loading_addr_(false) {}
+
+  // Keeps track of which sections have been loaded so we don't accidentally
+  // load it twice from two different files.
+  void LoadedSection(const std::string &section) {
+    if (loaded_sections_.count(section) == 0) {
+      loaded_sections_.insert(section);
+    } else {
+      fprintf(stderr, "Section %s has already been loaded.\n",
+              section.c_str());
+    }
+  }
+
+  // We expect the ELF file and linked debug file to have the same preferred
+  // loading address.
+  void set_loading_addr(ElfW(Addr) addr, const std::string &filename) {
+    if (!has_loading_addr_) {
+      loading_addr_ = addr;
+      loaded_file_ = filename;
+      return;
+    }
+
+    if (addr != loading_addr_) {
+      fprintf(stderr,
+              "ELF file '%s' and debug ELF file '%s' "
+              "have different load addresses.\n",
+              loaded_file_.c_str(), filename.c_str());
+      assert(false);
+    }
+  }
+
+  // Setters and getters
+  const std::string &debug_dir() const {
+    return debug_dir_;
+  }
+
+  std::string debuglink_file() const {
+    return debuglink_file_;
+  }
+  void set_debuglink_file(std::string file) {
+    debuglink_file_ = file;
+  }
+
+ private:
+  const std::string &debug_dir_;  // Directory with the debug ELF file.
+
+  std::string debuglink_file_;  // Full path to the debug ELF file.
+
+  bool has_loading_addr_;  // Indicate if LOADING_ADDR_ is valid.
+
+  ElfW(Addr) loading_addr_;  // Saves the preferred loading address from the
+                             // first call to LoadSymbols().
+
+  std::string loaded_file_;  // Name of the file loaded from the first call to
+                             // LoadSymbols().
+
+  std::set<std::string> loaded_sections_;  // Tracks the Loaded ELF sections
+                                           // between calls to LoadSymbols().
+};
+
+static bool LoadSymbols(const std::string &obj_file,
+                        const bool big_endian,
+                        ElfW(Ehdr) *elf_header,
+                        const bool read_gnu_debug_link,
+                        LoadSymbolsInfo *info,
+                        Module *module) {
+  // Translate all offsets in section headers into address.
+  FixAddress(elf_header);
+  ElfW(Addr) loading_addr = GetLoadingAddress(
+      reinterpret_cast<ElfW(Phdr) *>(elf_header->e_phoff),
+      elf_header->e_phnum);
+  module->SetLoadAddress(loading_addr);
+  info->set_loading_addr(loading_addr, obj_file);
+
+  const ElfW(Shdr) *sections =
+      reinterpret_cast<ElfW(Shdr) *>(elf_header->e_shoff);
+  const ElfW(Shdr) *section_names = sections + elf_header->e_shstrndx;
+  bool found_debug_info_section = false;
+  bool found_usable_info = false;
+
+  // Look for STABS debugging information, and load it if present.
+  const ElfW(Shdr) *stab_section
+      = FindSectionByName(".stab", sections, section_names,
+                          elf_header->e_shnum);
+  if (stab_section) {
+    const ElfW(Shdr) *stabstr_section = stab_section->sh_link + sections;
+    if (stabstr_section) {
+      found_debug_info_section = true;
+      found_usable_info = true;
+      info->LoadedSection(".stab");
+      if (!LoadStabs(elf_header, stab_section, stabstr_section, big_endian,
+                     module)) {
+        fprintf(stderr, "%s: \".stab\" section found, but failed to load STABS"
+                " debugging information\n", obj_file.c_str());
+      }
+    }
+  }
+
+  // Look for DWARF debugging information, and load it if present.
+  const ElfW(Shdr) *dwarf_section
+      = FindSectionByName(".debug_info", sections, section_names,
+                          elf_header->e_shnum);
+  if (dwarf_section) {
+    found_debug_info_section = true;
+    found_usable_info = true;
+    info->LoadedSection(".debug_info");
+    if (!LoadDwarf(obj_file, elf_header, big_endian, module))
+      fprintf(stderr, "%s: \".debug_info\" section found, but failed to load "
+              "DWARF debugging information\n", obj_file.c_str());
+  }
+
+  // Dwarf Call Frame Information (CFI) is actually independent from
+  // the other DWARF debugging information, and can be used alone.
+  const ElfW(Shdr) *dwarf_cfi_section =
+      FindSectionByName(".debug_frame", sections, section_names,
+                          elf_header->e_shnum);
+  if (dwarf_cfi_section) {
+    // Ignore the return value of this function; even without call frame
+    // information, the other debugging information could be perfectly
+    // useful.
+    info->LoadedSection(".debug_frame");
+    bool result =
+      LoadDwarfCFI(obj_file, elf_header, ".debug_frame",
+                   dwarf_cfi_section, false, 0, 0, big_endian, module);
+    found_usable_info = found_usable_info || result;
+  }
+
+  // Linux C++ exception handling information can also provide
+  // unwinding data.
+  const ElfW(Shdr) *eh_frame_section =
+      FindSectionByName(".eh_frame", sections, section_names,
+                        elf_header->e_shnum);
+  if (eh_frame_section) {
+    // Pointers in .eh_frame data may be relative to the base addresses of
+    // certain sections. Provide those sections if present.
+    const ElfW(Shdr) *got_section =
+      FindSectionByName(".got", sections, section_names, elf_header->e_shnum);
+    const ElfW(Shdr) *text_section =
+      FindSectionByName(".text", sections, section_names,
+                        elf_header->e_shnum);
+    info->LoadedSection(".eh_frame");
+    // As above, ignore the return value of this function.
+    bool result =
+      LoadDwarfCFI(obj_file, elf_header, ".eh_frame", eh_frame_section, true,
+                   got_section, text_section, big_endian, module);
+    found_usable_info = found_usable_info || result;
+  }
+
+  if (!found_debug_info_section) {
+    fprintf(stderr, "%s: file contains no debugging information"
+            " (no \".stab\" or \".debug_info\" sections)\n",
+            obj_file.c_str());
+
+    // Failed, but maybe we can find a .gnu_debuglink section?
+    if (read_gnu_debug_link) {
+      const ElfW(Shdr) *gnu_debuglink_section
+          = FindSectionByName(".gnu_debuglink", sections, section_names,
+                              elf_header->e_shnum);
+      if (gnu_debuglink_section) {
+        if (!info->debug_dir().empty()) {
+          std::string debuglink_file =
+              ReadDebugLink(gnu_debuglink_section, obj_file, info->debug_dir());
+          info->set_debuglink_file(debuglink_file);
+        } else {
+          fprintf(stderr, ".gnu_debuglink section found in '%s', "
+                  "but no debug path specified.\n", obj_file.c_str());
+        }
+      } else {
+        fprintf(stderr, "%s does not contain a .gnu_debuglink section.\n",
+                obj_file.c_str());
+      }
+    } else {
+      // The caller doesn't want to consult .gnu_debuglink.
+      // See if there are export symbols available.
+      const ElfW(Shdr) *dynsym_section =
+        FindSectionByName(".dynsym", sections, section_names,
+                          elf_header->e_shnum);
+      const ElfW(Shdr) *dynstr_section =
+        FindSectionByName(".dynstr", sections, section_names,
+                          elf_header->e_shnum);
+      if (dynsym_section && dynstr_section) {
+        info->LoadedSection(".dynsym");
+        fprintf(stderr, "Have .dynsym + .dynstr\n");
+
+        uint8_t* dynsyms =
+          reinterpret_cast<uint8_t*>(dynsym_section->sh_offset);
+        uint8_t* dynstrs =
+          reinterpret_cast<uint8_t*>(dynstr_section->sh_offset);
+        bool result =
+          ELFSymbolsToModule(dynsyms,
+                             dynsym_section->sh_size,
+                             dynstrs,
+                             dynstr_section->sh_size,
+                             big_endian,
+                             // This could change to something more useful
+                             // when support for dumping cross-architecture
+                             // symbols is finished.
+                             sizeof(ElfW(Addr)),
+                             module);
+        found_usable_info = found_usable_info || result;
+      }
+
+      // Return true if some usable information was found, since
+      // the caller doesn't want to use .gnu_debuglink.
+      return found_usable_info;
+    }
+
+    // No debug info was found, let the user try again with .gnu_debuglink
+    // if present.
+    return false;
+  }
+
+  return true;
+}
+
+// Return the breakpad symbol file identifier for the architecture of
+// ELF_HEADER.
+const char *ElfArchitecture(const ElfW(Ehdr) *elf_header) {
+  ElfW(Half) arch = elf_header->e_machine;
+  switch (arch) {
+    case EM_386:        return "x86";
+    case EM_ARM:        return "arm";
+    case EM_MIPS:       return "mips";
+    case EM_PPC64:      return "ppc64";
+    case EM_PPC:        return "ppc";
+    case EM_S390:       return "s390";
+    case EM_SPARC:      return "sparc";
+    case EM_SPARCV9:    return "sparcv9";
+    case EM_X86_64:     return "x86_64";
+    default: return NULL;
+  }
+}
+
+// Format the Elf file identifier in IDENTIFIER as a UUID with the
+// dashes removed.
+std::string FormatIdentifier(unsigned char identifier[16]) {
+  char identifier_str[40];
+  google_breakpad::FileID::ConvertIdentifierToString(
+      identifier,
+      identifier_str,
+      sizeof(identifier_str));
+  std::string id_no_dash;
+  for (int i = 0; identifier_str[i] != '\0'; ++i)
+    if (identifier_str[i] != '-')
+      id_no_dash += identifier_str[i];
+  // Add an extra "0" by the end.  PDB files on Windows have an 'age'
+  // number appended to the end of the file identifier; this isn't
+  // really used or necessary on other platforms, but let's preserve
+  // the pattern.
+  id_no_dash += '0';
+  return id_no_dash;
+}
+
+// Return the non-directory portion of FILENAME: the portion after the
+// last slash, or the whole filename if there are no slashes.
+std::string BaseFileName(const std::string &filename) {
+  // Lots of copies!  basename's behavior is less than ideal.
+  char *c_filename = strdup(filename.c_str());
+  std::string base = basename(c_filename);
+  free(c_filename);
+  return base;
+}
+
+}  // namespace
+
+namespace google_breakpad {
+
+// Not explicitly exported, but not static so it can be used in unit tests.
+// Ideally obj_file would be const, but internally this code does write
+// to some ELF header fields to make its work simpler.
+bool WriteSymbolFileInternal(uint8_t* obj_file,
+                             const std::string &obj_filename,
+                             const std::string &debug_dir,
+                             std::ostream &sym_stream) {
+  ElfW(Ehdr) *elf_header = reinterpret_cast<ElfW(Ehdr) *>(obj_file);
+
+  if (!IsValidElf(elf_header)) {
+    fprintf(stderr, "Not a valid ELF file: %s\n", obj_filename.c_str());
+    return false;
+  }
+
+  unsigned char identifier[16];
+  if (!google_breakpad::FileID::ElfFileIdentifierFromMappedFile(elf_header,
+                                                                identifier)) {
+    fprintf(stderr, "%s: unable to generate file identifier\n",
+            obj_filename.c_str());
+    return false;
+  }
+
+  const char *architecture = ElfArchitecture(elf_header);
+  if (!architecture) {
+    fprintf(stderr, "%s: unrecognized ELF machine architecture: %d\n",
+            obj_filename.c_str(), elf_header->e_machine);
+    return false;
+  }
+
+  // Figure out what endianness this file is.
+  bool big_endian;
+  if (!ElfEndianness(elf_header, &big_endian))
+    return false;
+
+  std::string name = BaseFileName(obj_filename);
+  std::string os = "Linux";
+  std::string id = FormatIdentifier(identifier);
+
+  LoadSymbolsInfo info(debug_dir);
+  Module module(name, os, architecture, id);
+  if (!LoadSymbols(obj_filename, big_endian, elf_header, !debug_dir.empty(),
+                   &info, &module)) {
+    const std::string debuglink_file = info.debuglink_file();
+    if (debuglink_file.empty())
+      return false;
+
+    // Load debuglink ELF file.
+    fprintf(stderr, "Found debugging info in %s\n", debuglink_file.c_str());
+    MmapWrapper debug_map_wrapper;
+    ElfW(Ehdr) *debug_elf_header = NULL;
+    if (!LoadELF(debuglink_file, &debug_map_wrapper, &debug_elf_header))
+      return false;
+    // Sanity checks to make sure everything matches up.
+    const char *debug_architecture = ElfArchitecture(debug_elf_header);
+    if (!debug_architecture) {
+      fprintf(stderr, "%s: unrecognized ELF machine architecture: %d\n",
+              debuglink_file.c_str(), debug_elf_header->e_machine);
+      return false;
+    }
+    if (strcmp(architecture, debug_architecture)) {
+      fprintf(stderr, "%s with ELF machine architecture %s does not match "
+              "%s with ELF architecture %s\n",
+              debuglink_file.c_str(), debug_architecture,
+              obj_filename.c_str(), architecture);
+      return false;
+    }
+
+    bool debug_big_endian;
+    if (!ElfEndianness(debug_elf_header, &debug_big_endian))
+      return false;
+    if (debug_big_endian != big_endian) {
+      fprintf(stderr, "%s and %s does not match in endianness\n",
+              obj_filename.c_str(), debuglink_file.c_str());
+      return false;
+    }
+
+    if (!LoadSymbols(debuglink_file, debug_big_endian, debug_elf_header,
+                     false, &info, &module)) {
+      return false;
+    }
+  }
+  if (!module.Write(sym_stream))
+    return false;
+
+  return true;
+}
+
+bool WriteSymbolFile(const std::string &obj_file,
+                     const std::string &debug_dir,
+                     std::ostream &sym_stream) {
+  MmapWrapper map_wrapper;
+  ElfW(Ehdr) *elf_header = NULL;
+  if (!LoadELF(obj_file, &map_wrapper, &elf_header))
+    return false;
+
+  return WriteSymbolFileInternal(reinterpret_cast<uint8_t*>(elf_header),
+                                 obj_file, debug_dir, sym_stream);
+}
+
+}  // namespace google_breakpad

thirdparty/breakpad/common/linux/dump_symbols.h

@@ -0,0 +1,54 @@
+// -*- mode: c++ -*-
+
+// Copyright (c) 2010, 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.
+
+// dump_symbols.h: Read debugging information from an ELF file, and write
+// it out as a Breakpad symbol file.
+
+#ifndef COMMON_LINUX_DUMP_SYMBOLS_H__
+#define COMMON_LINUX_DUMP_SYMBOLS_H__
+
+#include <iostream>
+#include <string>
+
+namespace google_breakpad {
+
+// Find all the debugging information in OBJ_FILE, an ELF executable
+// or shared library, and write it to SYM_STREAM in the Breakpad symbol
+// file format.
+// If OBJ_FILE has been stripped but contains a .gnu_debuglink section,
+// then look for the debug file in DEBUG_DIR.
+bool WriteSymbolFile(const std::string &obj_file,
+                     const std::string &debug_dir,
+                     std::ostream &sym_stream);
+
+}  // namespace google_breakpad
+
+#endif  // COMMON_LINUX_DUMP_SYMBOLS_H__

thirdparty/breakpad/common/linux/dump_symbols_unittest.cc

@@ -0,0 +1,162 @@
+// Copyright (c) 2011 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.
+
+// Original author: Ted Mielczarek <ted.mielczarek@gmail.com>
+
+// dump_symbols_unittest.cc:
+// Unittests for google_breakpad::DumpSymbols
+
+#include <elf.h>
+#include <link.h>
+#include <stdio.h>
+
+#include <sstream>
+#include <string>
+#include <vector>
+
+#include "breakpad_googletest_includes.h"
+#include "common/linux/synth_elf.h"
+
+namespace google_breakpad {
+bool WriteSymbolFileInternal(uint8_t* obj_file,
+                             const std::string &obj_filename,
+                             const std::string &debug_dir,
+                             std::ostream &sym_stream);
+}
+
+using google_breakpad::synth_elf::ELF;
+using google_breakpad::synth_elf::StringTable;
+using google_breakpad::synth_elf::SymbolTable;
+using google_breakpad::test_assembler::kLittleEndian;
+using google_breakpad::test_assembler::Section;
+using google_breakpad::WriteSymbolFileInternal;
+using std::string;
+using std::stringstream;
+using std::vector;
+using ::testing::Test;
+
+class DumpSymbols : public Test {
+public:
+  void GetElfContents(ELF& elf) {
+    string contents;
+    ASSERT_TRUE(elf.GetContents(&contents));
+    ASSERT_LT(0, contents.size());
+
+    elfdata_v.clear();
+    elfdata_v.insert(elfdata_v.begin(), contents.begin(), contents.end());
+    elfdata = &elfdata_v[0];
+  }
+
+  vector<uint8_t> elfdata_v;
+  uint8_t* elfdata;
+};
+
+TEST_F(DumpSymbols, Invalid) {
+  Elf32_Ehdr header;
+  memset(&header, 0, sizeof(header));
+  stringstream s;
+  EXPECT_FALSE(WriteSymbolFileInternal(reinterpret_cast<uint8_t*>(&header),
+                                       "foo",
+                                       "",
+                                       s));
+}
+
+// TODO(ted): Fix the dump_symbols code to deal with cross-word-size
+// ELF files.
+#if __ELF_NATIVE_CLASS == 32
+TEST_F(DumpSymbols, SimplePublic32) {
+  ELF elf(EM_386, ELFCLASS32, kLittleEndian);
+  // Zero out text section for simplicity.
+  Section text(kLittleEndian);
+  text.Append(4096, 0);
+  elf.AddSection(".text", text, SHT_PROGBITS);
+
+  // Add a public symbol.
+  StringTable table(kLittleEndian);
+  SymbolTable syms(kLittleEndian, 4, table);
+  syms.AddSymbol("superfunc", (uint32_t)0x1000, (uint32_t)0x10,
+                 ELF32_ST_INFO(STB_GLOBAL, STT_FUNC),
+                 SHN_UNDEF + 1);
+  int index = elf.AddSection(".dynstr", table, SHT_STRTAB);
+  elf.AddSection(".dynsym", syms,
+                 SHT_DYNSYM, // type
+                 SHF_ALLOC,  // flags
+                 0,          // addr
+                 index,      // link
+                 sizeof(Elf32_Sym)); // entsize
+
+  elf.Finish();
+  GetElfContents(elf);
+
+  stringstream s;
+  ASSERT_TRUE(WriteSymbolFileInternal(elfdata,
+                                      "foo",
+                                      "",
+                                      s));
+  EXPECT_EQ("MODULE Linux x86 000000000000000000000000000000000 foo\n"
+            "PUBLIC 1000 0 superfunc\n",
+            s.str());
+}
+#endif
+
+#if __ELF_NATIVE_CLASS == 64
+TEST_F(DumpSymbols, SimplePublic64) {
+  ELF elf(EM_X86_64, ELFCLASS64, kLittleEndian);
+  // Zero out text section for simplicity.
+  Section text(kLittleEndian);
+  text.Append(4096, 0);
+  elf.AddSection(".text", text, SHT_PROGBITS);
+
+  // Add a public symbol.
+  StringTable table(kLittleEndian);
+  SymbolTable syms(kLittleEndian, 8, table);
+  syms.AddSymbol("superfunc", (uint64_t)0x1000, (uint64_t)0x10,
+                 ELF64_ST_INFO(STB_GLOBAL, STT_FUNC),
+                 SHN_UNDEF + 1);
+  int index = elf.AddSection(".dynstr", table, SHT_STRTAB);
+  elf.AddSection(".dynsym", syms,
+                 SHT_DYNSYM, // type
+                 SHF_ALLOC,  // flags
+                 0,          // addr
+                 index,      // link
+                 sizeof(Elf64_Sym)); // entsize
+
+  elf.Finish();
+  GetElfContents(elf);
+
+  stringstream s;
+  ASSERT_TRUE(WriteSymbolFileInternal(elfdata,
+                                      "foo",
+                                      "",
+                                      s));
+  EXPECT_EQ("MODULE Linux x86_64 000000000000000000000000000000000 foo\n"
+            "PUBLIC 1000 0 superfunc\n",
+            s.str());
+}
+#endif

thirdparty/breakpad/common/linux/eintr_wrapper.h

@@ -0,0 +1,47 @@
+// Copyright (c) 2010 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.
+
+#ifndef COMMON_LINUX_EINTR_WRAPPER_H_
+#define COMMON_LINUX_EINTR_WRAPPER_H_
+
+#include <errno.h>
+
+// This provides a wrapper around system calls which may be interrupted by a
+// signal and return EINTR. See man 7 signal.
+//
+
+#define HANDLE_EINTR(x) ({ \
+  typeof(x) __eintr_result__; \
+  do { \
+    __eintr_result__ = x; \
+  } while (__eintr_result__ == -1 && errno == EINTR); \
+  __eintr_result__;\
+})
+
+#endif // ifndef COMMON_LINUX_EINTR_WRAPPER_H_

thirdparty/breakpad/common/linux/elf_symbols_to_module.cc

@@ -0,0 +1,168 @@
+// -*- mode: c++ -*-
+
+// Copyright (c) 2011 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.
+
+// Original author: Ted Mielczarek <ted.mielczarek@gmail.com>
+
+#include "common/linux/elf_symbols_to_module.h"
+
+#include <elf.h>
+#include <string.h>
+
+#include "common/byte_cursor.h"
+#include "common/module.h"
+
+namespace google_breakpad {
+
+class ELFSymbolIterator {
+public:
+  // The contents of an ELF symbol, adjusted for the host's endianness,
+  // word size, and so on. Corresponds to the data in Elf32_Sym / Elf64_Sym.
+  struct Symbol {
+    // True if this iterator has reached the end of the symbol array. When
+    // this is set, the other members of this structure are not valid.
+    bool at_end;
+
+    // The number of this symbol within the list.
+    size_t index;
+
+    // The current symbol's name offset. This is the offset within the
+    // string table.
+    size_t name_offset;
+
+    // The current symbol's value, size, info and shndx fields.
+    uint64_t value;
+    uint64_t size;
+    unsigned char info;
+    uint16_t shndx;
+  };
+
+  // Create an ELFSymbolIterator walking the symbols in BUFFER. Treat the
+  // symbols as big-endian if BIG_ENDIAN is true, as little-endian
+  // otherwise. Assume each symbol has a 'value' field whose size is
+  // VALUE_SIZE.
+  //
+  ELFSymbolIterator(const ByteBuffer *buffer, bool big_endian,
+                    size_t value_size)
+    : value_size_(value_size), cursor_(buffer, big_endian) {
+    // Actually, weird sizes could be handled just fine, but they're
+    // probably mistakes --- expressed in bits, say.
+    assert(value_size == 4 || value_size == 8);
+    symbol_.index = 0;
+    Fetch();
+  }
+
+  // Move to the next symbol. This function's behavior is undefined if
+  // at_end() is true when it is called.
+  ELFSymbolIterator &operator++() { Fetch(); symbol_.index++; return *this; }
+
+  // Dereferencing this iterator produces a reference to an Symbol structure
+  // that holds the current symbol's values. The symbol is owned by this
+  // SymbolIterator, and will be invalidated at the next call to operator++.
+  const Symbol &operator*() const { return symbol_; }
+  const Symbol *operator->() const { return &symbol_; }
+
+private:
+  // Read the symbol at cursor_, and set symbol_ appropriately.
+  void Fetch() {
+    // Elf32_Sym and Elf64_Sym have different layouts.
+    unsigned char other;
+    if (value_size_ == 4) {
+      // Elf32_Sym
+      cursor_
+        .Read(4, false, &symbol_.name_offset)
+        .Read(4, false, &symbol_.value)
+        .Read(4, false, &symbol_.size)
+        .Read(1, false, &symbol_.info)
+        .Read(1, false, &other)
+        .Read(2, false, &symbol_.shndx);
+    } else {
+      // Elf64_Sym
+      cursor_
+        .Read(4, false, &symbol_.name_offset)
+        .Read(1, false, &symbol_.info)
+        .Read(1, false, &other)
+        .Read(2, false, &symbol_.shndx)
+        .Read(8, false, &symbol_.value)
+        .Read(8, false, &symbol_.size);
+    }
+    symbol_.at_end = !cursor_;
+  }
+
+  // The size of symbols' value field, in bytes.
+  size_t value_size_;
+
+  // A byte cursor traversing buffer_.
+  ByteCursor cursor_;
+
+  // Values for the symbol this iterator refers to.
+  Symbol symbol_;
+};
+
+const char *SymbolString(ptrdiff_t offset, ByteBuffer& strings) {
+  if (offset < 0 || (size_t) offset >= strings.Size()) {
+    // Return the null string.
+    offset = 0;
+  }
+  return reinterpret_cast<const char *>(strings.start + offset);
+}
+
+bool ELFSymbolsToModule(const uint8_t *symtab_section,
+                        size_t symtab_size,
+                        const uint8_t *string_section,
+                        size_t string_size,
+                        const bool big_endian,
+                        size_t value_size,
+                        Module *module) {
+  ByteBuffer symbols(symtab_section, symtab_size);
+  // Ensure that the string section is null-terminated.
+  if (string_section[string_size - 1] != '\0') {
+    const void* null_terminator = memrchr(string_section, '\0', string_size);
+    string_size = reinterpret_cast<const uint8_t*>(null_terminator)
+      - string_section;
+  }
+  ByteBuffer strings(string_section, string_size);
+
+  // The iterator walking the symbol table.
+  ELFSymbolIterator iterator(&symbols, big_endian, value_size);
+
+  while(!iterator->at_end) {
+    if (ELF32_ST_TYPE(iterator->info) == STT_FUNC &&
+        iterator->shndx != SHN_UNDEF) {
+      Module::Extern *ext = new Module::Extern;
+      ext->name = SymbolString(iterator->name_offset, strings);
+      ext->address = iterator->value;
+      module->AddExtern(ext);
+    }
+    ++iterator;
+  }
+  return true;
+}
+
+}  // namespace google_breakpad

thirdparty/breakpad/common/linux/elf_symbols_to_module.h

@@ -0,0 +1,58 @@
+// -*- mode: c++ -*-
+
+// Copyright (c) 2011 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.
+
+// Original author: Ted Mielczarek <ted.mielczarek@gmail.com>
+
+// elf_symbols_to_module.h: Exposes ELFSymbolsToModule, a function
+// for reading ELF symbol tables and inserting exported symbol names
+// into a google_breakpad::Module as Extern definitions.
+
+#ifndef BREAKPAD_COMMON_LINUX_ELF_SYMBOLS_TO_MODULE_H_
+#define BREAKPAD_COMMON_LINUX_ELF_SYMBOLS_TO_MODULE_H_
+
+#include <stddef.h>
+#include <stdint.h>
+
+namespace google_breakpad {
+
+class Module;
+
+bool ELFSymbolsToModule(const uint8_t *symtab_section,
+                        size_t symtab_size,
+                        const uint8_t *string_section,
+                        size_t string_size,
+                        const bool big_endian,
+                        size_t value_size,
+                        Module *module);
+
+}  // namespace google_breakpad
+
+
+#endif  // BREAKPAD_COMMON_LINUX_ELF_SYMBOLS_TO_MODULE_H_

thirdparty/breakpad/common/linux/elf_symbols_to_module_unittest.cc

@@ -0,0 +1,370 @@
+// Copyright (c) 2011 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.
+
+// Original author: Ted Mielczarek <ted.mielczarek@gmail.com>
+
+// elf_symbols_to_module_unittest.cc:
+// Unittests for google_breakpad::ELFSymbolsToModule
+
+#include <elf.h>
+
+#include <string>
+#include <vector>
+
+#include "breakpad_googletest_includes.h"
+#include "common/linux/elf_symbols_to_module.h"
+#include "common/linux/synth_elf.h"
+#include "common/module.h"
+#include "common/test_assembler.h"
+
+using google_breakpad::Module;
+using google_breakpad::synth_elf::StringTable;
+using google_breakpad::test_assembler::Endianness;
+using google_breakpad::test_assembler::kBigEndian;
+using google_breakpad::test_assembler::kLittleEndian;
+using google_breakpad::test_assembler::Label;
+using google_breakpad::test_assembler::Section;
+using ::testing::Test;
+using ::testing::TestWithParam;
+using std::string;
+using std::vector;
+
+class ELFSymbolsToModuleTestFixture {
+public:
+  ELFSymbolsToModuleTestFixture(Endianness endianness,
+                                size_t value_size) : module("a", "b", "c", "d"),
+                                                     section(endianness),
+                                                     table(endianness),
+                                                     value_size(value_size) {}
+
+  bool ProcessSection() {
+    string section_contents, table_contents;
+    section.GetContents(&section_contents);
+    table.GetContents(&table_contents);
+
+    bool ret = ELFSymbolsToModule(reinterpret_cast<const uint8_t*>(section_contents.data()),
+                                  section_contents.size(),
+                                  reinterpret_cast<const uint8_t*>(table_contents.data()),
+                                  table_contents.size(),
+                                  section.endianness() == kBigEndian,
+                                  value_size,
+                                  &module);
+    module.GetExterns(&externs, externs.end());
+    return ret;
+  }
+
+  Module module;
+  Section section;
+  StringTable table;
+  string section_contents;
+  // 4 or 8 (bytes)
+  size_t value_size;
+
+  vector<Module::Extern *> externs;
+};
+
+class ELFSymbolsToModuleTest32 : public ELFSymbolsToModuleTestFixture,
+                                   public TestWithParam<Endianness>  {
+public:
+  ELFSymbolsToModuleTest32() : ELFSymbolsToModuleTestFixture(GetParam(), 4) {}
+
+  void AddElf32Sym(const string& name, uint32_t value,
+                   uint32_t size, unsigned info, uint16_t shndx) {
+    section
+      .D32(table.Add(name))
+      .D32(value)
+      .D32(size)
+      .D8(info)
+      .D8(0) // other
+      .D16(shndx);
+  }
+};
+
+TEST_P(ELFSymbolsToModuleTest32, NoFuncs) {
+  ProcessSection();
+
+  ASSERT_EQ((size_t)0, externs.size());
+}
+
+TEST_P(ELFSymbolsToModuleTest32, OneFunc) {
+  const string kFuncName = "superfunc";
+  const uint32_t kFuncAddr = 0x1000;
+  const uint32_t kFuncSize = 0x10;
+
+  AddElf32Sym(kFuncName, kFuncAddr, kFuncSize,
+              ELF32_ST_INFO(STB_GLOBAL, STT_FUNC),
+              // Doesn't really matter, just can't be SHN_UNDEF.
+              SHN_UNDEF + 1);
+
+  ProcessSection();
+
+  ASSERT_EQ((size_t)1, externs.size());
+  Module::Extern *extern1 = externs[0];
+  EXPECT_EQ(kFuncName, extern1->name);
+  EXPECT_EQ((Module::Address)kFuncAddr, extern1->address);
+}
+
+TEST_P(ELFSymbolsToModuleTest32, NameOutOfBounds) {
+  const string kFuncName = "";
+  const uint32_t kFuncAddr = 0x1000;
+  const uint32_t kFuncSize = 0x10;
+
+  table.Add("Foo");
+  table.Add("Bar");
+  // Can't use AddElf32Sym because it puts in a valid string offset.
+  section
+    .D32((uint32_t)table.Here().Value() + 1)
+    .D32(kFuncAddr)
+    .D32(kFuncSize)
+    .D8(ELF32_ST_INFO(STB_GLOBAL, STT_FUNC))
+    .D8(0) // other
+    .D16(SHN_UNDEF + 1);
+
+  ProcessSection();
+
+  ASSERT_EQ((size_t)1, externs.size());
+  Module::Extern *extern1 = externs[0];
+  EXPECT_EQ(kFuncName, extern1->name);
+  EXPECT_EQ((Module::Address)kFuncAddr, extern1->address);
+}
+
+TEST_P(ELFSymbolsToModuleTest32, NonTerminatedStringTable) {
+  const string kFuncName = "";
+  const uint32_t kFuncAddr = 0x1000;
+  const uint32_t kFuncSize = 0x10;
+
+  table.Add("Foo");
+  table.Add("Bar");
+  // Add a non-null-terminated string to the end of the string table
+  Label l;
+  table
+    .Mark(&l)
+    .Append("Unterminated");
+  // Can't use AddElf32Sym because it puts in a valid string offset.
+  section
+    .D32((uint32_t)l.Value())
+    .D32(kFuncAddr)
+    .D32(kFuncSize)
+    .D8(ELF32_ST_INFO(STB_GLOBAL, STT_FUNC))
+    .D8(0) // other
+    .D16(SHN_UNDEF + 1);
+
+  ProcessSection();
+
+  ASSERT_EQ((size_t)1, externs.size());
+  Module::Extern *extern1 = externs[0];
+  EXPECT_EQ(kFuncName, extern1->name);
+  EXPECT_EQ((Module::Address)kFuncAddr, extern1->address);
+}
+
+TEST_P(ELFSymbolsToModuleTest32, MultipleFuncs) {
+  const string kFuncName1 = "superfunc";
+  const uint32_t kFuncAddr1 = 0x10001000;
+  const uint32_t kFuncSize1 = 0x10;
+  const string kFuncName2 = "awesomefunc";
+  const uint32_t kFuncAddr2 = 0x20002000;
+  const uint32_t kFuncSize2 = 0x2f;
+  const string kFuncName3 = "megafunc";
+  const uint32_t kFuncAddr3 = 0x30003000;
+  const uint32_t kFuncSize3 = 0x3c;
+
+  AddElf32Sym(kFuncName1, kFuncAddr1, kFuncSize1,
+              ELF32_ST_INFO(STB_GLOBAL, STT_FUNC),
+              // Doesn't really matter, just can't be SHN_UNDEF.
+              SHN_UNDEF + 1);
+  AddElf32Sym(kFuncName2, kFuncAddr2, kFuncSize2,
+              ELF32_ST_INFO(STB_LOCAL, STT_FUNC),
+              // Doesn't really matter, just can't be SHN_UNDEF.
+              SHN_UNDEF + 2);
+  AddElf32Sym(kFuncName3, kFuncAddr3, kFuncSize3,
+              ELF32_ST_INFO(STB_LOCAL, STT_FUNC),
+              // Doesn't really matter, just can't be SHN_UNDEF.
+              SHN_UNDEF + 3);
+
+  ProcessSection();
+
+  ASSERT_EQ((size_t)3, externs.size());
+  Module::Extern *extern1 = externs[0];
+  EXPECT_EQ(kFuncName1, extern1->name);
+  EXPECT_EQ((Module::Address)kFuncAddr1, extern1->address);
+  Module::Extern *extern2 = externs[1];
+  EXPECT_EQ(kFuncName2, extern2->name);
+  EXPECT_EQ((Module::Address)kFuncAddr2, extern2->address);
+  Module::Extern *extern3 = externs[2];
+  EXPECT_EQ(kFuncName3, extern3->name);
+  EXPECT_EQ((Module::Address)kFuncAddr3, extern3->address);
+}
+
+TEST_P(ELFSymbolsToModuleTest32, SkipStuff) {
+  const string kFuncName = "superfunc";
+  const uint32_t kFuncAddr = 0x1000;
+  const uint32_t kFuncSize = 0x10;
+
+  // Should skip functions in SHN_UNDEF
+  AddElf32Sym("skipme", 0xFFFF, 0x10,
+              ELF32_ST_INFO(STB_GLOBAL, STT_FUNC),
+              SHN_UNDEF);
+  AddElf32Sym(kFuncName, kFuncAddr, kFuncSize,
+              ELF32_ST_INFO(STB_GLOBAL, STT_FUNC),
+              // Doesn't really matter, just can't be SHN_UNDEF.
+              SHN_UNDEF + 1);
+  // Should skip non-STT_FUNC entries.
+  AddElf32Sym("skipmetoo", 0xAAAA, 0x10,
+              ELF32_ST_INFO(STB_GLOBAL, STT_FILE),
+              SHN_UNDEF + 1);
+
+  ProcessSection();
+
+  ASSERT_EQ((size_t)1, externs.size());
+  Module::Extern *extern1 = externs[0];
+  EXPECT_EQ(kFuncName, extern1->name);
+  EXPECT_EQ((Module::Address)kFuncAddr, extern1->address);
+}
+
+// Run all the 32-bit tests with both endianness
+INSTANTIATE_TEST_CASE_P(Endian,
+                        ELFSymbolsToModuleTest32,
+                        ::testing::Values(kLittleEndian, kBigEndian));
+
+// Similar tests, but with 64-bit values. Ostensibly this could be
+// shoehorned into the parameterization by using ::testing::Combine,
+// but that would make it difficult to get the types right since these
+// actual test cases aren't parameterized. This could also be written
+// as a type-parameterized test, but combining that with a value-parameterized
+// test seemed really ugly, and also makes it harder to test 64-bit
+// values.
+class ELFSymbolsToModuleTest64 : public ELFSymbolsToModuleTestFixture,
+                                 public TestWithParam<Endianness>  {
+public:
+  ELFSymbolsToModuleTest64() : ELFSymbolsToModuleTestFixture(GetParam(), 8) {}
+
+  void AddElf64Sym(const string& name, uint64_t value,
+                   uint64_t size, unsigned info, uint16_t shndx) {
+    section
+      .D32(table.Add(name))
+      .D8(info)
+      .D8(0) // other
+      .D16(shndx)
+      .D64(value)
+      .D64(size);
+  }
+};
+
+TEST_P(ELFSymbolsToModuleTest64, NoFuncs) {
+  ProcessSection();
+
+  ASSERT_EQ((size_t)0, externs.size());
+}
+
+TEST_P(ELFSymbolsToModuleTest64, OneFunc) {
+  const string kFuncName = "superfunc";
+  const uint64_t kFuncAddr = 0x1000200030004000ULL;
+  const uint64_t kFuncSize = 0x1000;
+
+  AddElf64Sym(kFuncName, kFuncAddr, kFuncSize,
+              ELF64_ST_INFO(STB_GLOBAL, STT_FUNC),
+              // Doesn't really matter, just can't be SHN_UNDEF.
+              SHN_UNDEF + 1);
+
+  ProcessSection();
+
+  ASSERT_EQ((size_t)1, externs.size());
+  Module::Extern *extern1 = externs[0];
+  EXPECT_EQ(kFuncName, extern1->name);
+  EXPECT_EQ((Module::Address)kFuncAddr, extern1->address);
+}
+
+TEST_P(ELFSymbolsToModuleTest64, MultipleFuncs) {
+  const string kFuncName1 = "superfunc";
+  const uint64_t kFuncAddr1 = 0x1000100010001000ULL;
+  const uint64_t kFuncSize1 = 0x1000;
+  const string kFuncName2 = "awesomefunc";
+  const uint64_t kFuncAddr2 = 0x2000200020002000ULL;
+  const uint64_t kFuncSize2 = 0x2f00;
+  const string kFuncName3 = "megafunc";
+  const uint64_t kFuncAddr3 = 0x3000300030003000ULL;
+  const uint64_t kFuncSize3 = 0x3c00;
+
+  AddElf64Sym(kFuncName1, kFuncAddr1, kFuncSize1,
+              ELF64_ST_INFO(STB_GLOBAL, STT_FUNC),
+              // Doesn't really matter, just can't be SHN_UNDEF.
+              SHN_UNDEF + 1);
+  AddElf64Sym(kFuncName2, kFuncAddr2, kFuncSize2,
+              ELF64_ST_INFO(STB_LOCAL, STT_FUNC),
+              // Doesn't really matter, just can't be SHN_UNDEF.
+              SHN_UNDEF + 2);
+  AddElf64Sym(kFuncName3, kFuncAddr3, kFuncSize3,
+              ELF64_ST_INFO(STB_LOCAL, STT_FUNC),
+              // Doesn't really matter, just can't be SHN_UNDEF.
+              SHN_UNDEF + 3);
+
+  ProcessSection();
+
+  ASSERT_EQ((size_t)3, externs.size());
+  Module::Extern *extern1 = externs[0];
+  EXPECT_EQ(kFuncName1, extern1->name);
+  EXPECT_EQ((Module::Address)kFuncAddr1, extern1->address);
+  Module::Extern *extern2 = externs[1];
+  EXPECT_EQ(kFuncName2, extern2->name);
+  EXPECT_EQ((Module::Address)kFuncAddr2, extern2->address);
+  Module::Extern *extern3 = externs[2];
+  EXPECT_EQ(kFuncName3, extern3->name);
+  EXPECT_EQ((Module::Address)kFuncAddr3, extern3->address);
+}
+
+TEST_P(ELFSymbolsToModuleTest64, SkipStuff) {
+  const string kFuncName = "superfunc";
+  const uint64_t kFuncAddr = 0x1000100010001000ULL;
+  const uint64_t kFuncSize = 0x1000;
+
+  // Should skip functions in SHN_UNDEF
+  AddElf64Sym("skipme", 0xFFFF, 0x10,
+              ELF64_ST_INFO(STB_GLOBAL, STT_FUNC),
+              SHN_UNDEF);
+  AddElf64Sym(kFuncName, kFuncAddr, kFuncSize,
+              ELF64_ST_INFO(STB_GLOBAL, STT_FUNC),
+              // Doesn't really matter, just can't be SHN_UNDEF.
+              SHN_UNDEF + 1);
+  // Should skip non-STT_FUNC entries.
+  AddElf64Sym("skipmetoo", 0xAAAA, 0x10,
+              ELF64_ST_INFO(STB_GLOBAL, STT_FILE),
+              SHN_UNDEF + 1);
+
+  ProcessSection();
+
+  ASSERT_EQ((size_t)1, externs.size());
+  Module::Extern *extern1 = externs[0];
+  EXPECT_EQ(kFuncName, extern1->name);
+  EXPECT_EQ((Module::Address)kFuncAddr, extern1->address);
+}
+
+// Run all the 64-bit tests with both endianness
+INSTANTIATE_TEST_CASE_P(Endian,
+                        ELFSymbolsToModuleTest64,
+                        ::testing::Values(kLittleEndian, kBigEndian));

thirdparty/breakpad/common/linux/file_id.cc

@@ -0,0 +1,300 @@
+// 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 <arpa/inet.h>
+#include <assert.h>
+#include <elf.h>
+#include <fcntl.h>
+#if defined(__ANDROID__)
+#include "client/linux/android_link.h"
+#else
+#include <link.h>
+#endif
+#include <stdio.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include <algorithm>
+
+#include "common/linux/linux_libc_support.h"
+#include "third_party/lss/linux_syscall_support.h"
+
+namespace google_breakpad {
+
+#ifndef NT_GNU_BUILD_ID
+#define NT_GNU_BUILD_ID 3
+#endif
+
+FileID::FileID(const char* path) {
+  strncpy(path_, path, sizeof(path_));
+}
+
+struct ElfClass32 {
+  typedef Elf32_Ehdr Ehdr;
+  typedef Elf32_Nhdr Nhdr;
+  typedef Elf32_Shdr Shdr;
+  static const int kClass = ELFCLASS32;
+};
+
+struct ElfClass64 {
+  typedef Elf64_Ehdr Ehdr;
+  typedef Elf64_Nhdr Nhdr;
+  typedef Elf64_Shdr Shdr;
+  static const int kClass = ELFCLASS64;
+};
+
+// These six functions are also used inside the crashed process, so be safe
+// and use the syscall/libc wrappers instead of direct syscalls or libc.
+template<typename ElfClass>
+static void FindElfClassSection(const char *elf_base,
+                                const char *section_name,
+                                uint32_t section_type,
+                                const void **section_start,
+                                int *section_size) {
+  typedef typename ElfClass::Ehdr Ehdr;
+  typedef typename ElfClass::Shdr Shdr;
+
+  assert(elf_base);
+  assert(section_start);
+  assert(section_size);
+
+  assert(my_strncmp(elf_base, ELFMAG, SELFMAG) == 0);
+
+  int name_len = my_strlen(section_name);
+
+  const Ehdr* elf_header = reinterpret_cast<const Ehdr*>(elf_base);
+  assert(elf_header->e_ident[EI_CLASS] == ElfClass::kClass);
+
+  const Shdr* sections =
+      reinterpret_cast<const Shdr*>(elf_base + elf_header->e_shoff);
+  const Shdr* string_section = sections + elf_header->e_shstrndx;
+
+  const Shdr* section = NULL;
+  for (int i = 0; i < elf_header->e_shnum; ++i) {
+    if (sections[i].sh_type == section_type) {
+      const char* section_name = (char*)(elf_base +
+                                         string_section->sh_offset +
+                                         sections[i].sh_name);
+      if (!my_strncmp(section_name, section_name, name_len)) {
+        section = &sections[i];
+        break;
+      }
+    }
+  }
+  if (section != NULL && section->sh_size > 0) {
+    *section_start = elf_base + section->sh_offset;
+    *section_size = section->sh_size;
+  }
+}
+
+// Attempt to find a section named |section_name| of type |section_type|
+// in the ELF binary data at |elf_mapped_base|. On success, returns true
+// and sets |*section_start| to point to the start of the section data,
+// and |*section_size| to the size of the section's data. If |elfclass|
+// is not NULL, set |*elfclass| to the ELF file class.
+static bool FindElfSection(const void *elf_mapped_base,
+                           const char *section_name,
+                           uint32_t section_type,
+                           const void **section_start,
+                           int *section_size,
+                           int *elfclass) {
+  assert(elf_mapped_base);
+  assert(section_start);
+  assert(section_size);
+
+  *section_start = NULL;
+  *section_size = 0;
+
+  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 (elfclass) {
+    *elfclass = elf_header->e_ident[EI_CLASS];
+  }
+
+  if (elf_header->e_ident[EI_CLASS] == ELFCLASS32) {
+    FindElfClassSection<ElfClass32>(elf_base, section_name, section_type,
+                                    section_start, section_size);
+    return *section_start != NULL;
+  } else if (elf_header->e_ident[EI_CLASS] == ELFCLASS64) {
+    FindElfClassSection<ElfClass64>(elf_base, section_name, section_type,
+                                    section_start, section_size);
+    return *section_start != NULL;
+  }
+
+  return false;
+}
+
+template<typename ElfClass>
+static bool ElfClassBuildIDNoteIdentifier(const void *section,
+                                          uint8_t identifier[kMDGUIDSize])
+{
+  typedef typename ElfClass::Nhdr Nhdr;
+
+  const Nhdr* note_header = reinterpret_cast<const Nhdr*>(section);
+  if (note_header->n_type != NT_GNU_BUILD_ID ||
+      note_header->n_descsz == 0) {
+    return false;
+  }
+
+  const char* build_id = reinterpret_cast<const char*>(section) +
+    sizeof(Nhdr) + note_header->n_namesz;
+  // Copy as many bits of the build ID as will fit
+  // into the GUID space.
+  my_memset(identifier, 0, kMDGUIDSize);
+  memcpy(identifier, build_id,
+         std::min(kMDGUIDSize, (size_t)note_header->n_descsz));
+
+  return true;
+}
+
+// Attempt to locate a .note.gnu.build-id section in an ELF binary
+// and copy as many bytes of it as will fit into |identifier|.
+static bool FindElfBuildIDNote(const void *elf_mapped_base,
+                               uint8_t identifier[kMDGUIDSize])
+{
+  void* note_section;
+  int note_size, elfclass;
+  if (!FindElfSection(elf_mapped_base, ".note.gnu.build-id", SHT_NOTE,
+                      (const void**)&note_section, &note_size, &elfclass) ||
+      note_size == 0) {
+    return false;
+  }
+
+  if (elfclass == ELFCLASS32) {
+    return ElfClassBuildIDNoteIdentifier<ElfClass32>(note_section, identifier);
+  } else if (elfclass == ELFCLASS64) {
+    return ElfClassBuildIDNoteIdentifier<ElfClass64>(note_section, identifier);
+  }
+
+  return false;
+}
+
+// Attempt to locate the .text section of an ELF binary and generate
+// a simple hash by XORing the first page worth of bytes into |identifier|.
+static bool HashElfTextSection(const void *elf_mapped_base,
+                               uint8_t identifier[kMDGUIDSize]) {
+
+  void* text_section;
+  int text_size;
+  if (!FindElfSection(elf_mapped_base, ".text", SHT_PROGBITS,
+                      (const void**)&text_section, &text_size, NULL) ||
+      text_size == 0) {
+    return false;
+  }
+
+  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;
+  }
+  return true;
+}
+
+// static
+bool FileID::ElfFileIdentifierFromMappedFile(void* base,
+                                             uint8_t identifier[kMDGUIDSize])
+{
+  // Look for a build id note first.
+  if (FindElfBuildIDNote(base, identifier))
+    return true;
+
+  // Fall back on hashing the first page of the text section.
+  return HashElfTextSection(base, identifier);
+}
+
+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

thirdparty/breakpad/common/linux/file_id.h

@@ -0,0 +1,77 @@
+// 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.h: Return a unique identifier for a file
+//
+
+#ifndef COMMON_LINUX_FILE_ID_H__
+#define COMMON_LINUX_FILE_ID_H__
+
+#include <limits.h>
+
+#include "common/linux/guid_creator.h"
+
+namespace google_breakpad {
+
+static const size_t kMDGUIDSize = sizeof(MDGUID);
+
+class FileID {
+ public:
+  explicit FileID(const char* path);
+  ~FileID() {}
+
+  // Load the identifier for the elf file path specified in the constructor into
+  // |identifier|.  Return false if the identifier could not be created for the
+  // file.
+  // The current implementation will look for a .note.gnu.build-id
+  // section and use that as the file id, otherwise it falls back to
+  // XORing the first 4096 bytes of the .text section to generate an identifier.
+  bool ElfFileIdentifier(uint8_t identifier[kMDGUIDSize]);
+
+  // Load the identifier for the elf file mapped into memory at |base| into
+  // |identifier|.  Return false if the identifier could not be created for the
+  // file.
+  static bool ElfFileIdentifierFromMappedFile(void* base,
+                                              uint8_t identifier[kMDGUIDSize]);
+
+  // Convert the |identifier| data to a NULL terminated string.  The string will
+  // be formatted as a UUID (e.g., 22F065BB-FC9C-49F7-80FE-26A7CEBD7BCE).
+  // The |buffer| should be at least 37 bytes long to receive all of the data
+  // and termination.  Shorter buffers will contain truncated data.
+  static void ConvertIdentifierToString(const uint8_t identifier[kMDGUIDSize],
+                                        char* buffer, int buffer_length);
+
+ private:
+  // Storage for the path specified
+  char path_[PATH_MAX];
+};
+
+}  // namespace google_breakpad
+
+#endif  // COMMON_LINUX_FILE_ID_H__

thirdparty/breakpad/common/linux/file_id_unittest.cc

@@ -0,0 +1,183 @@
+// Copyright (c) 2010, 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.
+
+// Unit tests for FileID
+
+#include <elf.h>
+#include <stdlib.h>
+
+#include "common/linux/file_id.h"
+#include "common/linux/synth_elf.h"
+#include "common/test_assembler.h"
+#include "breakpad_googletest_includes.h"
+
+using namespace google_breakpad;
+using google_breakpad::synth_elf::BuildIDNote;
+using google_breakpad::synth_elf::ELF;
+using google_breakpad::test_assembler::kLittleEndian;
+using google_breakpad::test_assembler::Section;
+
+TEST(FileIDStripTest, StripSelf) {
+  // Calculate the File ID of this binary using
+  // FileID::ElfFileIdentifier, then make a copy of this binary,
+  // strip it, and ensure that the result is the same.
+  char exe_name[PATH_MAX];
+  ssize_t len = readlink("/proc/self/exe", exe_name, PATH_MAX - 1);
+  ASSERT_NE(len, -1);
+  exe_name[len] = '\0';
+
+  // copy our binary to a temp file, and strip it
+  char templ[] = "/tmp/file-id-unittest-XXXXXX";
+  mktemp(templ);
+  char cmdline[4096];
+  sprintf(cmdline, "cp \"%s\" \"%s\"", exe_name, templ);
+  ASSERT_EQ(system(cmdline), 0);
+  sprintf(cmdline, "strip \"%s\"", templ);
+  ASSERT_EQ(system(cmdline), 0);
+
+  uint8_t identifier1[sizeof(MDGUID)];
+  uint8_t identifier2[sizeof(MDGUID)];
+  FileID fileid1(exe_name);
+  EXPECT_TRUE(fileid1.ElfFileIdentifier(identifier1));
+  FileID fileid2(templ);
+  EXPECT_TRUE(fileid2.ElfFileIdentifier(identifier2));
+  char identifier_string1[37];
+  char identifier_string2[37];
+  FileID::ConvertIdentifierToString(identifier1, identifier_string1,
+                                    37);
+  FileID::ConvertIdentifierToString(identifier2, identifier_string2,
+                                    37);
+  EXPECT_STREQ(identifier_string1, identifier_string2);
+  unlink(templ);
+}
+
+class FileIDTest : public testing::Test {
+public:
+  void GetElfContents(ELF& elf) {
+    string contents;
+    ASSERT_TRUE(elf.GetContents(&contents));
+    ASSERT_LT(0, contents.size());
+
+    elfdata_v.clear();
+    elfdata_v.insert(elfdata_v.begin(), contents.begin(), contents.end());
+    elfdata = &elfdata_v[0];
+  }
+
+  vector<uint8_t> elfdata_v;
+  uint8_t* elfdata;
+};
+
+TEST_F(FileIDTest, ElfClass) {
+  uint8_t identifier[sizeof(MDGUID)];
+  const char expected_identifier_string[] =
+      "80808080-8080-0000-0000-008080808080";
+  char identifier_string[sizeof(expected_identifier_string)];
+  const size_t kTextSectionSize = 128;
+
+  ELF elf32(EM_386, ELFCLASS32, kLittleEndian);
+  Section text32(kLittleEndian);
+  for (size_t i = 0; i < kTextSectionSize; ++i) {
+    text32.D8(i * 3);
+  }
+  elf32.AddSection(".text", text32, SHT_PROGBITS);
+  elf32.Finish();
+  GetElfContents(elf32);
+
+  EXPECT_TRUE(FileID::ElfFileIdentifierFromMappedFile(elfdata, identifier));
+
+  FileID::ConvertIdentifierToString(identifier, identifier_string,
+                                    sizeof(identifier_string));
+  EXPECT_STREQ(expected_identifier_string, identifier_string);
+
+  memset(identifier, 0, sizeof(identifier));
+  memset(identifier_string, 0, sizeof(identifier_string));
+
+  ELF elf64(EM_X86_64, ELFCLASS64, kLittleEndian);
+  Section text64(kLittleEndian);
+  for (size_t i = 0; i < kTextSectionSize; ++i) {
+    text64.D8(i * 3);
+  }
+  elf64.AddSection(".text", text64, SHT_PROGBITS);
+  elf64.Finish();
+  GetElfContents(elf64);
+
+  EXPECT_TRUE(FileID::ElfFileIdentifierFromMappedFile(elfdata, identifier));
+
+  FileID::ConvertIdentifierToString(identifier, identifier_string,
+                                    sizeof(identifier_string));
+  EXPECT_STREQ(expected_identifier_string, identifier_string);
+}
+
+TEST_F(FileIDTest, BuildID) {
+  const uint8_t kExpectedIdentifier[sizeof(MDGUID)] =
+    {0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
+     0x08, 0x09, 0x0A, 0x0B, 0x0C, 0x0D, 0x0E, 0x0F};
+  char expected_identifier_string[] =
+    "00000000-0000-0000-0000-000000000000";
+  FileID::ConvertIdentifierToString(kExpectedIdentifier,
+                                    expected_identifier_string,
+                                    sizeof(expected_identifier_string));
+
+  uint8_t identifier[sizeof(MDGUID)];
+  char identifier_string[sizeof(expected_identifier_string)];
+
+  ELF elf32(EM_386, ELFCLASS32, kLittleEndian);
+  Section text(kLittleEndian);
+  text.Append(4096, 0);
+  elf32.AddSection(".text", text, SHT_PROGBITS);
+  BuildIDNote::AppendSection(elf32,
+                             kExpectedIdentifier,
+                             sizeof(kExpectedIdentifier));
+  elf32.Finish();
+  GetElfContents(elf32);
+
+  EXPECT_TRUE(FileID::ElfFileIdentifierFromMappedFile(elfdata, identifier));
+
+  FileID::ConvertIdentifierToString(identifier, identifier_string,
+                                    sizeof(identifier_string));
+  EXPECT_STREQ(expected_identifier_string, identifier_string);
+
+  memset(identifier, 0, sizeof(identifier));
+  memset(identifier_string, 0, sizeof(identifier_string));
+
+  ELF elf64(EM_X86_64, ELFCLASS64, kLittleEndian);
+  // Re-use empty text section from previous test
+  elf64.AddSection(".text", text, SHT_PROGBITS);
+  BuildIDNote::AppendSection(elf64,
+                             kExpectedIdentifier,
+                             sizeof(kExpectedIdentifier));
+  elf64.Finish();
+  GetElfContents(elf64);
+
+  EXPECT_TRUE(FileID::ElfFileIdentifierFromMappedFile(elfdata, identifier));
+
+  FileID::ConvertIdentifierToString(identifier, identifier_string,
+                                    sizeof(identifier_string));
+  EXPECT_STREQ(expected_identifier_string, identifier_string);
+}

thirdparty/breakpad/common/linux/google_crashdump_uploader.cc

@@ -0,0 +1,199 @@
+// Copyright (c) 2009, 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.
+
+
+#include "common/linux/google_crashdump_uploader.h"
+#include "common/linux/libcurl_wrapper.h"
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <unistd.h>
+
+#include <iostream>
+
+using std::string;
+
+namespace google_breakpad {
+
+GoogleCrashdumpUploader::GoogleCrashdumpUploader(const std::string& product,
+                                                 const std::string& version,
+                                                 const std::string& guid,
+                                                 const std::string& ptime,
+                                                 const std::string& ctime,
+                                                 const std::string& email,
+                                                 const std::string& comments,
+                                                 const std::string& minidump_pathname,
+                                                 const std::string& crash_server,
+                                                 const std::string& proxy_host,
+                                                 const std::string& proxy_userpassword) {
+  LibcurlWrapper* http_layer = new LibcurlWrapper();
+  Init(product,
+       version,
+       guid,
+       ptime,
+       ctime,
+       email,
+       comments,
+       minidump_pathname,
+       crash_server,
+       proxy_host,
+       proxy_userpassword,
+       http_layer);
+}
+
+GoogleCrashdumpUploader::GoogleCrashdumpUploader(const std::string& product,
+                                                 const std::string& version,
+                                                 const std::string& guid,
+                                                 const std::string& ptime,
+                                                 const std::string& ctime,
+                                                 const std::string& email,
+                                                 const std::string& comments,
+                                                 const std::string& minidump_pathname,
+                                                 const std::string& crash_server,
+                                                 const std::string& proxy_host,
+                                                 const std::string& proxy_userpassword,
+                                                 LibcurlWrapper* http_layer) {
+  Init(product,
+       version,
+       guid,
+       ptime,
+       ctime,
+       email,
+       comments,
+       minidump_pathname,
+       crash_server,
+       proxy_host,
+       proxy_userpassword,
+       http_layer);
+}
+
+void GoogleCrashdumpUploader::Init(const std::string& product,
+                                   const std::string& version,
+                                   const std::string& guid,
+                                   const std::string& ptime,
+                                   const std::string& ctime,
+                                   const std::string& email,
+                                   const std::string& comments,
+                                   const std::string& minidump_pathname,
+                                   const std::string& crash_server,
+                                   const std::string& proxy_host,
+                                   const std::string& proxy_userpassword,
+                                   LibcurlWrapper* http_layer) {
+  product_ = product;
+  version_ = version;
+  guid_ = guid;
+  ptime_ = ptime;
+  ctime_ = ctime;
+  email_ = email;
+  comments_ = comments;
+  http_layer_ = http_layer;
+
+  crash_server_ = crash_server;
+  proxy_host_ = proxy_host;
+  proxy_userpassword_ = proxy_userpassword;
+  minidump_pathname_ = minidump_pathname;
+  std::cout << "Uploader initializing";
+  std::cout << "\tProduct: " << product_;
+  std::cout << "\tVersion: " << version_;
+  std::cout << "\tGUID: " << guid_;
+  if (!ptime_.empty()) {
+    std::cout << "\tProcess uptime: " << ptime_;
+  }
+  if (!ctime_.empty()) {
+    std::cout << "\tCumulative Process uptime: " << ctime_;
+  }
+  if (!email_.empty()) {
+    std::cout << "\tEmail: " << email_;
+  }
+  if (!comments_.empty()) {
+    std::cout << "\tComments: " << comments_;
+  }
+}
+
+bool GoogleCrashdumpUploader::CheckRequiredParametersArePresent() {
+  std::string error_text;
+  if (product_.empty()) {
+    error_text.append("\nProduct name must be specified.");
+  }
+
+  if (version_.empty()) {
+    error_text.append("\nProduct version must be specified.");
+  }
+
+  if (guid_.empty()) {
+    error_text.append("\nClient ID must be specified.");
+  }
+
+  if (minidump_pathname_.empty()) {
+    error_text.append("\nMinidump pathname must be specified.");
+  }
+
+  if (!error_text.empty()) {
+    std::cout << error_text;
+    return false;
+  }
+  return true;
+
+}
+
+bool GoogleCrashdumpUploader::Upload() {
+  bool ok = http_layer_->Init();
+  if (!ok) {
+    std::cout << "http layer init failed";
+    return ok;
+  }
+
+  if (!CheckRequiredParametersArePresent()) {
+    return false;
+  }
+
+  struct stat st;
+  int err = stat(minidump_pathname_.c_str(), &st);
+  if (err) {
+    std::cout << minidump_pathname_ << " could not be found";
+    return false;
+  }
+
+  parameters_["prod"] = product_;
+  parameters_["ver"] = version_;
+  parameters_["guid"] = guid_;
+  parameters_["ptime"] = ptime_;
+  parameters_["ctime"] = ctime_;
+  parameters_["email"] = email_;
+  parameters_["comments_"] = comments_;
+  if (!http_layer_->AddFile(minidump_pathname_,
+                            "upload_file_minidump")) {
+    return false;
+  }
+  std::cout << "Sending request to " << crash_server_;
+  return http_layer_->SendRequest(crash_server_,
+                                  parameters_,
+                                  NULL);
+}
+}

thirdparty/breakpad/common/linux/google_crashdump_uploader.h

@@ -0,0 +1,98 @@
+// Copyright (c) 2009, 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.
+
+
+#include <string>
+#include <map>
+
+namespace google_breakpad {
+
+class LibcurlWrapper;
+
+class GoogleCrashdumpUploader {
+ public:
+  GoogleCrashdumpUploader(const std::string& product,
+                          const std::string& version,
+                          const std::string& guid,
+                          const std::string& ptime,
+                          const std::string& ctime,
+                          const std::string& email,
+                          const std::string& comments,
+                          const std::string& minidump_pathname,
+                          const std::string& crash_server,
+                          const std::string& proxy_host,
+                          const std::string& proxy_userpassword);
+
+  GoogleCrashdumpUploader(const std::string& product,
+                          const std::string& version,
+                          const std::string& guid,
+                          const std::string& ptime,
+                          const std::string& ctime,
+                          const std::string& email,
+                          const std::string& comments,
+                          const std::string& minidump_pathname,
+                          const std::string& crash_server,
+                          const std::string& proxy_host,
+                          const std::string& proxy_userpassword,
+                          LibcurlWrapper* http_layer);
+
+  void Init(const std::string& product,
+            const std::string& version,
+            const std::string& guid,
+            const std::string& ptime,
+            const std::string& ctime,
+            const std::string& email,
+            const std::string& comments,
+            const std::string& minidump_pathname,
+            const std::string& crash_server,
+            const std::string& proxy_host,
+            const std::string& proxy_userpassword,
+            LibcurlWrapper* http_layer);
+  bool Upload();
+
+ private:
+  bool CheckRequiredParametersArePresent();
+
+  LibcurlWrapper* http_layer_;
+  std::string product_;
+  std::string version_;
+  std::string guid_;
+  std::string ptime_;
+  std::string ctime_;
+  std::string email_;
+  std::string comments_;
+  std::string minidump_pathname_;
+
+  std::string crash_server_;
+  std::string proxy_host_;
+  std::string proxy_userpassword_;
+
+  std::map<std::string, std::string> parameters_;
+};
+}

thirdparty/breakpad/common/linux/google_crashdump_uploader_test.cc

@@ -0,0 +1,166 @@
+// Copyright (c) 2009, 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.
+
+// Unit test for crash dump uploader.
+
+#include "common/linux/google_crashdump_uploader.h"
+#include "common/linux/libcurl_wrapper.h"
+#include "breakpad_googletest_includes.h"
+
+namespace google_breakpad {
+
+using ::testing::Return;
+using ::testing::_;
+
+class MockLibcurlWrapper : public LibcurlWrapper {
+ public:
+  MOCK_METHOD0(Init, bool());
+  MOCK_METHOD2(SetProxy, bool(const std::string& proxy_host,
+                              const std::string& proxy_userpwd));
+  MOCK_METHOD2(AddFile, bool(const std::string& upload_file_path,
+                             const std::string& basename));
+  MOCK_METHOD3(SendRequest,
+               bool(const std::string& url,
+                    const std::map<std::string, std::string>& parameters,
+                    std::string* server_response));
+};
+
+class GoogleCrashdumpUploaderTest : public ::testing::Test {
+};
+
+TEST_F(GoogleCrashdumpUploaderTest, InitFailsCausesUploadFailure) {
+  MockLibcurlWrapper m;
+  EXPECT_CALL(m, Init()).Times(1).WillOnce(Return(false));
+  GoogleCrashdumpUploader *uploader = new GoogleCrashdumpUploader("foobar",
+                                                                  "1.0",
+                                                                  "AAA-BBB",
+                                                                  "",
+                                                                  "",
+                                                                  "test@test.com",
+                                                                  "none",
+                                                                  "/tmp/foo.dmp",
+                                                                  "http://foo.com",
+                                                                  "",
+                                                                  "",
+                                                                  &m);
+  ASSERT_FALSE(uploader->Upload());
+}
+
+TEST_F(GoogleCrashdumpUploaderTest, TestSendRequestHappensWithValidParameters) {
+  // Create a temp file
+  char tempfn[80] = "/tmp/googletest-upload-XXXXXX";
+  int fd = mkstemp(tempfn);
+  ASSERT_NE(fd, -1);
+  close(fd);
+
+  MockLibcurlWrapper m;
+  EXPECT_CALL(m, Init()).Times(1).WillOnce(Return(true));
+  EXPECT_CALL(m, AddFile(tempfn, _)).WillOnce(Return(true));
+  EXPECT_CALL(m,
+              SendRequest("http://foo.com",_,_)).Times(1).WillOnce(Return(true));
+  GoogleCrashdumpUploader *uploader = new GoogleCrashdumpUploader("foobar",
+                                                                  "1.0",
+                                                                  "AAA-BBB",
+                                                                  "",
+                                                                  "",
+                                                                  "test@test.com",
+                                                                  "none",
+                                                                  tempfn,
+                                                                  "http://foo.com",
+                                                                  "",
+                                                                  "",
+                                                                  &m);
+  ASSERT_TRUE(uploader->Upload());
+}
+
+
+TEST_F(GoogleCrashdumpUploaderTest, InvalidPathname) {
+  MockLibcurlWrapper m;
+  EXPECT_CALL(m, Init()).Times(1).WillOnce(Return(true));
+  EXPECT_CALL(m, SendRequest(_,_,_)).Times(0);
+  GoogleCrashdumpUploader *uploader = new GoogleCrashdumpUploader("foobar",
+                                                                  "1.0",
+                                                                  "AAA-BBB",
+                                                                  "",
+                                                                  "",
+                                                                  "test@test.com",
+                                                                  "none",
+                                                                  "/tmp/foo.dmp",
+                                                                  "http://foo.com",
+                                                                  "",
+                                                                  "",
+                                                                  &m);
+  ASSERT_FALSE(uploader->Upload());
+}
+
+TEST_F(GoogleCrashdumpUploaderTest, TestRequiredParametersMustBePresent) {
+  // Test with empty product name.
+  GoogleCrashdumpUploader uploader("",
+                                   "1.0",
+                                   "AAA-BBB",
+                                   "",
+                                   "",
+                                   "test@test.com",
+                                   "none",
+                                   "/tmp/foo.dmp",
+                                   "http://foo.com",
+                                   "",
+                                   "");
+  ASSERT_FALSE(uploader.Upload());
+
+  // Test with empty product version.
+  GoogleCrashdumpUploader uploader1("product",
+                                    "",
+                                    "AAA-BBB",
+                                    "",
+                                    "",
+                                    "",
+                                    "",
+                                    "/tmp/foo.dmp",
+                                    "",
+                                    "",
+                                    "");
+
+  ASSERT_FALSE(uploader1.Upload());
+
+  // Test with empty client GUID.
+  GoogleCrashdumpUploader uploader2("product",
+                                    "1.0",
+                                    "",
+                                    "",
+                                    "",
+                                    "",
+                                    "",
+                                    "/tmp/foo.dmp",
+                                    "",
+                                    "",
+                                    "");
+  ASSERT_FALSE(uploader2.Upload());
+}
+}

thirdparty/breakpad/common/linux/guid_creator.cc

@@ -0,0 +1,96 @@
+// 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.
+
+#include "common/linux/guid_creator.h"
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <time.h>
+#include <unistd.h>
+
+//
+// GUIDGenerator
+//
+// This class is used to generate random GUID.
+// Currently use random number to generate a GUID since Linux has
+// no native GUID generator. This should be OK since we don't expect
+// crash to happen very offen.
+//
+class GUIDGenerator {
+ public:
+  GUIDGenerator() {
+    srandom(time(NULL));
+  }
+
+  static u_int32_t BytesToUInt32(const u_int8_t bytes[]) {
+    return ((u_int32_t) bytes[0]
+            | ((u_int32_t) bytes[1] << 8)
+            | ((u_int32_t) bytes[2] << 16)
+            | ((u_int32_t) bytes[3] << 24));
+  }
+
+  static void UInt32ToBytes(u_int8_t bytes[], u_int32_t n) {
+    bytes[0] = n & 0xff;
+    bytes[1] = (n >> 8) & 0xff;
+    bytes[2] = (n >> 16) & 0xff;
+    bytes[3] = (n >> 24) & 0xff;
+  }
+
+  bool CreateGUID(GUID *guid) const {
+    guid->data1 = random();
+    guid->data2 = (u_int16_t)(random());
+    guid->data3 = (u_int16_t)(random());
+    UInt32ToBytes(&guid->data4[0], random());
+    UInt32ToBytes(&guid->data4[4], random());
+    return true;
+  }
+};
+
+// Guid generator.
+const GUIDGenerator kGuidGenerator;
+
+bool CreateGUID(GUID *guid) {
+  return kGuidGenerator.CreateGUID(guid);
+}
+
+// Parse guid to string.
+bool GUIDToString(const GUID *guid, char *buf, int buf_len) {
+  // Should allow more space the the max length of GUID.
+  assert(buf_len > kGUIDStringLength);
+  int num = snprintf(buf, buf_len, kGUIDFormatString,
+                     guid->data1, guid->data2, guid->data3,
+                     GUIDGenerator::BytesToUInt32(&(guid->data4[0])),
+                     GUIDGenerator::BytesToUInt32(&(guid->data4[4])));
+  if (num != kGUIDStringLength)
+    return false;
+
+  buf[num] = '\0';
+  return true;
+}

thirdparty/breakpad/common/linux/guid_creator.h

@@ -0,0 +1,48 @@
+// 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.
+
+#ifndef COMMON_LINUX_GUID_CREATOR_H__
+#define COMMON_LINUX_GUID_CREATOR_H__
+
+#include "google_breakpad/common/minidump_format.h"
+
+typedef MDGUID GUID;
+
+// Format string for parsing GUID.
+#define kGUIDFormatString "%08x-%04x-%04x-%08x-%08x"
+// Length of GUID string. Don't count the ending '\0'.
+#define kGUIDStringLength 36
+
+// Create a guid.
+bool CreateGUID(GUID *guid);
+
+// Get the string from guid.
+bool GUIDToString(const GUID *guid, char *buf, int buf_len);
+
+#endif

thirdparty/breakpad/common/linux/http_upload.cc

@@ -0,0 +1,197 @@
+// 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.
+
+#include "common/linux/http_upload.h"
+
+#include <assert.h>
+#include <dlfcn.h>
+#include "third_party/curl/curl.h"
+
+namespace {
+
+// Callback to get the response data from server.
+static size_t WriteCallback(void *ptr, size_t size,
+                            size_t nmemb, void *userp) {
+  if (!userp)
+    return 0;
+
+  std::string *response = reinterpret_cast<std::string *>(userp);
+  size_t real_size = size * nmemb;
+  response->append(reinterpret_cast<char *>(ptr), real_size);
+  return real_size;
+}
+
+}  // namespace
+
+namespace google_breakpad {
+
+static const char kUserAgent[] = "Breakpad/1.0 (Linux)";
+
+// static
+bool HTTPUpload::SendRequest(const string &url,
+                             const map<string, string> &parameters,
+                             const string &upload_file,
+                             const string &file_part_name,
+                             const string &proxy,
+                             const string &proxy_user_pwd,
+                             const string &ca_certificate_file,
+                             string *response_body,
+                             string *error_description) {
+  if (!CheckParameters(parameters))
+    return false;
+
+  void *curl_lib = dlopen("libcurl.so", RTLD_NOW);
+  if (!curl_lib) {
+    if (error_description != NULL)
+      *error_description = dlerror();
+    curl_lib = dlopen("libcurl.so.4", RTLD_NOW);
+  }
+  if (!curl_lib) {
+    // Debian gives libcurl a different name when it is built against GnuTLS
+    // instead of OpenSSL.
+    curl_lib = dlopen("libcurl-gnutls.so.4", RTLD_NOW);
+  }
+  if (!curl_lib) {
+    curl_lib = dlopen("libcurl.so.3", RTLD_NOW);
+  }
+  if (!curl_lib) {
+    return false;
+  }
+
+  CURL* (*curl_easy_init)(void);
+  *(void**) (&curl_easy_init) = dlsym(curl_lib, "curl_easy_init");
+  CURL *curl = (*curl_easy_init)();
+  if (error_description != NULL)
+    *error_description = "No Error";
+
+  if (!curl) {
+    dlclose(curl_lib);
+    return false;
+  }
+
+  CURLcode err_code = CURLE_OK;
+  CURLcode (*curl_easy_setopt)(CURL *, CURLoption, ...);
+  *(void**) (&curl_easy_setopt) = dlsym(curl_lib, "curl_easy_setopt");
+  (*curl_easy_setopt)(curl, CURLOPT_URL, url.c_str());
+  (*curl_easy_setopt)(curl, CURLOPT_USERAGENT, kUserAgent);
+  // Set proxy information if necessary.
+  if (!proxy.empty())
+    (*curl_easy_setopt)(curl, CURLOPT_PROXY, proxy.c_str());
+  if (!proxy_user_pwd.empty())
+    (*curl_easy_setopt)(curl, CURLOPT_PROXYUSERPWD, proxy_user_pwd.c_str());
+
+  if (!ca_certificate_file.empty())
+    (*curl_easy_setopt)(curl, CURLOPT_CAINFO, ca_certificate_file.c_str());
+
+  struct curl_httppost *formpost = NULL;
+  struct curl_httppost *lastptr = NULL;
+  // Add form data.
+  CURLFORMcode (*curl_formadd)(struct curl_httppost **, struct curl_httppost **, ...);
+  *(void**) (&curl_formadd) = dlsym(curl_lib, "curl_formadd");
+  map<string, string>::const_iterator iter = parameters.begin();
+  for (; iter != parameters.end(); ++iter)
+    (*curl_formadd)(&formpost, &lastptr,
+                 CURLFORM_COPYNAME, iter->first.c_str(),
+                 CURLFORM_COPYCONTENTS, iter->second.c_str(),
+                 CURLFORM_END);
+
+  // Add form file.
+  (*curl_formadd)(&formpost, &lastptr,
+               CURLFORM_COPYNAME, file_part_name.c_str(),
+               CURLFORM_FILE, upload_file.c_str(),
+               CURLFORM_END);
+
+  (*curl_easy_setopt)(curl, CURLOPT_HTTPPOST, formpost);
+
+  // Disable 100-continue header.
+  struct curl_slist *headerlist = NULL;
+  char buf[] = "Expect:";
+  struct curl_slist* (*curl_slist_append)(struct curl_slist *, const char *);
+  *(void**) (&curl_slist_append) = dlsym(curl_lib, "curl_slist_append");
+  headerlist = (*curl_slist_append)(headerlist, buf);
+  (*curl_easy_setopt)(curl, CURLOPT_HTTPHEADER, headerlist);
+
+  if (response_body != NULL) {
+    (*curl_easy_setopt)(curl, CURLOPT_WRITEFUNCTION, WriteCallback);
+    (*curl_easy_setopt)(curl, CURLOPT_WRITEDATA,
+                     reinterpret_cast<void *>(response_body));
+  }
+
+  // Fail if 400+ is returned from the web server.
+  (*curl_easy_setopt)(curl, CURLOPT_FAILONERROR, 1);
+
+  CURLcode (*curl_easy_perform)(CURL *);
+  *(void**) (&curl_easy_perform) = dlsym(curl_lib, "curl_easy_perform");
+  err_code = (*curl_easy_perform)(curl);
+  const char* (*curl_easy_strerror)(CURLcode);
+  *(void**) (&curl_easy_strerror) = dlsym(curl_lib, "curl_easy_strerror");
+#ifndef NDEBUG
+  if (err_code != CURLE_OK)
+    fprintf(stderr, "Failed to send http request to %s, error: %s\n",
+            url.c_str(),
+            (*curl_easy_strerror)(err_code));
+#endif
+  if (error_description != NULL)
+    *error_description = (*curl_easy_strerror)(err_code);
+
+  void (*curl_easy_cleanup)(CURL *);
+  *(void**) (&curl_easy_cleanup) = dlsym(curl_lib, "curl_easy_cleanup");
+  (*curl_easy_cleanup)(curl);
+  if (formpost != NULL) {
+    void (*curl_formfree)(struct curl_httppost *);
+    *(void**) (&curl_formfree) = dlsym(curl_lib, "curl_formfree");
+    (*curl_formfree)(formpost);
+  }
+  if (headerlist != NULL) {
+    void (*curl_slist_free_all)(struct curl_slist *);
+    *(void**) (&curl_slist_free_all) = dlsym(curl_lib, "curl_slist_free_all");
+    (*curl_slist_free_all)(headerlist);
+  }
+  dlclose(curl_lib);
+  return err_code == CURLE_OK;
+}
+
+// static
+bool HTTPUpload::CheckParameters(const map<string, string> &parameters) {
+  for (map<string, string>::const_iterator pos = parameters.begin();
+       pos != parameters.end(); ++pos) {
+    const string &str = pos->first;
+    if (str.size() == 0)
+      return false;  // disallow empty parameter names
+    for (unsigned int i = 0; i < str.size(); ++i) {
+      int c = str[i];
+      if (c < 32 || c == '"' || c > 127) {
+        return false;
+      }
+    }
+  }
+  return true;
+}
+
+}  // namespace google_breakpad

thirdparty/breakpad/common/linux/http_upload.h

@@ -0,0 +1,84 @@
+// 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.
+
+// HTTPUpload provides a "nice" API to send a multipart HTTP(S) POST
+// request using libcurl.  It currently supports requests that contain
+// a set of string parameters (key/value pairs), and a file to upload.
+
+#ifndef COMMON_LINUX_HTTP_UPLOAD_H__
+#define COMMON_LINUX_HTTP_UPLOAD_H__
+
+#include <map>
+#include <string>
+
+namespace google_breakpad {
+
+using std::string;
+using std::map;
+
+class HTTPUpload {
+ public:
+  // Sends the given set of parameters, along with the contents of
+  // upload_file, as a multipart POST request to the given URL.
+  // file_part_name contains the name of the file part of the request
+  // (i.e. it corresponds to the name= attribute on an <input type="file">.
+  // Parameter names must contain only printable ASCII characters,
+  // and may not contain a quote (") character.
+  // Only HTTP(S) URLs are currently supported.  Returns true on success.
+  // If the request is successful and response_body is non-NULL,
+  // the response body will be returned in response_body.
+  // If the send fails, a description of the error will be
+  // returned in error_description.
+  static bool SendRequest(const string &url,
+                          const map<string, string> &parameters,
+                          const string &upload_file,
+                          const string &file_part_name,
+                          const string &proxy,
+                          const string &proxy_user_pwd,
+                          const string &ca_certificate_file,
+                          string *response_body,
+                          string *error_description);
+
+ private:
+  // Checks that the given list of parameters has only printable
+  // ASCII characters in the parameter name, and does not contain
+  // any quote (") characters.  Returns true if so.
+  static bool CheckParameters(const map<string, string> &parameters);
+
+  // No instances of this class should be created.
+  // Disallow all constructors, destructors, and operator=.
+  HTTPUpload();
+  explicit HTTPUpload(const HTTPUpload &);
+  void operator=(const HTTPUpload &);
+  ~HTTPUpload();
+};
+
+}  // namespace google_breakpad
+
+#endif  // COMMON_LINUX_HTTP_UPLOAD_H__

thirdparty/breakpad/common/linux/libcurl_wrapper.cc

@@ -0,0 +1,223 @@
+// Copyright (c) 2009, 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.
+
+#include <dlfcn.h>
+
+#include <iostream>
+#include <string>
+
+#include "common/linux/libcurl_wrapper.h"
+
+using std::string;
+
+namespace google_breakpad {
+LibcurlWrapper::LibcurlWrapper()
+    : init_ok_(false),
+      formpost_(NULL),
+      lastptr_(NULL),
+      headerlist_(NULL) {
+  curl_lib_ = dlopen("libcurl.so", RTLD_NOW);
+  if (!curl_lib_) {
+    curl_lib_ = dlopen("libcurl.so.4", RTLD_NOW);
+  }
+  if (!curl_lib_) {
+    curl_lib_ = dlopen("libcurl.so.3", RTLD_NOW);
+  }
+  if (!curl_lib_) {
+    std::cout << "Could not find libcurl via dlopen";
+    return;
+  }
+  std::cout << "LibcurlWrapper init succeeded";
+  init_ok_ = true;
+  return;
+}
+
+bool LibcurlWrapper::SetProxy(const std::string& proxy_host,
+                              const std::string& proxy_userpwd) {
+  if (!init_ok_) {
+    return false;
+  }
+  // Set proxy information if necessary.
+  if (!proxy_host.empty()) {
+    (*easy_setopt_)(curl_, CURLOPT_PROXY, proxy_host.c_str());
+  } else {
+    std::cout << "SetProxy called with empty proxy host.";
+    return false;
+  }
+  if (!proxy_userpwd.empty()) {
+    (*easy_setopt_)(curl_, CURLOPT_PROXYUSERPWD, proxy_userpwd.c_str());
+  } else {
+    std::cout << "SetProxy called with empty proxy username/password.";
+    return false;
+  }
+  std::cout << "Set proxy host to " << proxy_host;
+  return true;
+}
+
+bool LibcurlWrapper::AddFile(const std::string& upload_file_path,
+                             const std::string& basename) {
+  if (!init_ok_) {
+    return false;
+  }
+  std::cout << "Adding " << upload_file_path << " to form upload.";
+  // Add form file.
+  (*formadd_)(&formpost_, &lastptr_,
+              CURLFORM_COPYNAME, basename.c_str(),
+              CURLFORM_FILE, upload_file_path.c_str(),
+              CURLFORM_END);
+
+  return true;
+}
+
+// Callback to get the response data from server.
+static size_t WriteCallback(void *ptr, size_t size,
+                            size_t nmemb, void *userp) {
+  if (!userp)
+    return 0;
+
+  std::string *response = reinterpret_cast<std::string *>(userp);
+  size_t real_size = size * nmemb;
+  response->append(reinterpret_cast<char *>(ptr), real_size);
+  return real_size;
+}
+
+bool LibcurlWrapper::SendRequest(const std::string& url,
+                                 const std::map<std::string, std::string>& parameters,
+                                 std::string* server_response) {
+  (*easy_setopt_)(curl_, CURLOPT_URL, url.c_str());
+  std::map<std::string, std::string>::const_iterator iter = parameters.begin();
+  for (; iter != parameters.end(); ++iter)
+    (*formadd_)(&formpost_, &lastptr_,
+                CURLFORM_COPYNAME, iter->first.c_str(),
+                CURLFORM_COPYCONTENTS, iter->second.c_str(),
+                CURLFORM_END);
+
+  (*easy_setopt_)(curl_, CURLOPT_HTTPPOST, formpost_);
+  if (server_response != NULL) {
+    (*easy_setopt_)(curl_, CURLOPT_WRITEFUNCTION, WriteCallback);
+    (*easy_setopt_)(curl_, CURLOPT_WRITEDATA,
+                     reinterpret_cast<void *>(server_response));
+  }
+
+  CURLcode err_code = CURLE_OK;
+  err_code = (*easy_perform_)(curl_);
+  easy_strerror_ = reinterpret_cast<const char* (*)(CURLcode)>
+                       (dlsym(curl_lib_, "curl_easy_strerror"));
+
+#ifndef NDEBUG
+  if (err_code != CURLE_OK)
+    fprintf(stderr, "Failed to send http request to %s, error: %s\n",
+            url.c_str(),
+            (*easy_strerror_)(err_code));
+#endif
+  if (headerlist_ != NULL) {
+    (*slist_free_all_)(headerlist_);
+  }
+
+  (*easy_cleanup_)(curl_);
+  if (formpost_ != NULL) {
+    (*formfree_)(formpost_);
+  }
+
+  return err_code == CURLE_OK;
+}
+
+bool LibcurlWrapper::Init() {
+  if (!init_ok_) {
+    std::cout << "Init_OK was not true in LibcurlWrapper::Init(), check earlier log messages";
+    return false;
+  }
+
+  if (!SetFunctionPointers()) {
+    std::cout << "Could not find function pointers";
+    init_ok_ = false;
+    return false;
+  }
+
+  curl_ = (*easy_init_)();
+
+  last_curl_error_ = "No Error";
+
+  if (!curl_) {
+    dlclose(curl_lib_);
+    std::cout << "Curl initialization failed";
+    return false;
+  }
+
+  // Disable 100-continue header.
+  char buf[] = "Expect:";
+
+  headerlist_ = (*slist_append_)(headerlist_, buf);
+  (*easy_setopt_)(curl_, CURLOPT_HTTPHEADER, headerlist_);
+  return true;
+}
+
+#define SET_AND_CHECK_FUNCTION_POINTER(var, function_name, type) \
+  var = reinterpret_cast<type>(dlsym(curl_lib_, function_name)); \
+  if (!var) { \
+    std::cout << "Could not find libcurl function " << function_name; \
+    init_ok_ = false; \
+    return false; \
+  }
+
+bool LibcurlWrapper::SetFunctionPointers() {
+
+  SET_AND_CHECK_FUNCTION_POINTER(easy_init_,
+                                 "curl_easy_init",
+                                 CURL*(*)());
+
+  SET_AND_CHECK_FUNCTION_POINTER(easy_setopt_,
+                                 "curl_easy_setopt",
+                                 CURLcode(*)(CURL*, CURLoption, ...));
+
+  SET_AND_CHECK_FUNCTION_POINTER(formadd_, "curl_formadd",
+      CURLFORMcode(*)(curl_httppost**, curl_httppost**, ...));
+
+  SET_AND_CHECK_FUNCTION_POINTER(slist_append_, "curl_slist_append",
+      curl_slist*(*)(curl_slist*, const char*));
+
+  SET_AND_CHECK_FUNCTION_POINTER(easy_perform_,
+                                 "curl_easy_perform",
+                                 CURLcode(*)(CURL*));
+
+  SET_AND_CHECK_FUNCTION_POINTER(easy_cleanup_,
+                                 "curl_easy_cleanup",
+                                 void(*)(CURL*));
+
+  SET_AND_CHECK_FUNCTION_POINTER(slist_free_all_,
+                                 "curl_slist_free_all",
+                                 void(*)(curl_slist*));
+
+  SET_AND_CHECK_FUNCTION_POINTER(formfree_,
+                                 "curl_formfree",
+                                 void(*)(curl_httppost*));
+  return true;
+}
+
+}

thirdparty/breakpad/common/linux/libcurl_wrapper.h

@@ -0,0 +1,83 @@
+// Copyright (c) 2009, 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.
+
+// A wrapper for libcurl to do HTTP Uploads, to support easy mocking
+// and unit testing of the HTTPUpload class.
+
+#include <string>
+#include <map>
+
+#include "third_party/curl/curl.h"
+
+namespace google_breakpad {
+class LibcurlWrapper {
+ public:
+  LibcurlWrapper();
+  virtual bool Init();
+  virtual bool SetProxy(const std::string& proxy_host,
+                        const std::string& proxy_userpwd);
+  virtual bool AddFile(const std::string& upload_file_path,
+                       const std::string& basename);
+  virtual bool SendRequest(const std::string& url,
+                           const std::map<std::string, std::string>& parameters,
+                           std::string* server_response);
+ private:
+  // This function initializes class state corresponding to function
+  // pointers into the CURL library.
+  bool SetFunctionPointers();
+
+  bool init_ok_;                 // Whether init succeeded
+  void* curl_lib_;               // Pointer to result of dlopen() on
+                                 // curl library
+  std::string last_curl_error_;  // The text of the last error when
+                                 // dealing
+  // with CURL.
+
+  CURL *curl_;                   // Pointer for handle for CURL calls.
+
+  CURL* (*easy_init_)(void);
+
+  // Stateful pointers for calling into curl_formadd()
+  struct curl_httppost *formpost_;
+  struct curl_httppost *lastptr_;
+  struct curl_slist *headerlist_;
+
+  // Function pointers into CURL library
+  CURLcode (*easy_setopt_)(CURL *, CURLoption, ...);
+  CURLFORMcode (*formadd_)(struct curl_httppost **,
+                           struct curl_httppost **, ...);
+  struct curl_slist* (*slist_append_)(struct curl_slist *, const char *);
+  void (*slist_free_all_)(struct curl_slist *);
+  CURLcode (*easy_perform_)(CURL *);
+  const char* (*easy_strerror_)(CURLcode);
+  void (*easy_cleanup_)(CURL *);
+  void (*formfree_)(struct curl_httppost *);
+
+};
+}

thirdparty/breakpad/common/linux/linux_libc_support.h

@@ -0,0 +1,178 @@
+// Copyright (c) 2009, 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.
+
+// This header provides replacements for libc functions that we need. We if
+// call the libc functions directly we risk crashing in the dynamic linker as
+// it tries to resolve uncached PLT entries.
+
+#ifndef CLIENT_LINUX_LINUX_LIBC_SUPPORT_H_
+#define CLIENT_LINUX_LINUX_LIBC_SUPPORT_H_
+
+#include <stdint.h>
+#include <limits.h>
+#include <sys/types.h>
+
+extern "C" {
+
+static inline size_t
+my_strlen(const char* s) {
+  size_t len = 0;
+  while (*s++) len++;
+  return len;
+}
+
+static inline int
+my_strcmp(const char* a, const char* b) {
+  for (;;) {
+    if (*a < *b)
+      return -1;
+    else if (*a > *b)
+      return 1;
+    else if (*a == 0)
+      return 0;
+    a++;
+    b++;
+  }
+}
+
+static inline int
+my_strncmp(const char* a, const char* b, size_t len) {
+  for (size_t i = 0; i < len; ++i) {
+    if (*a < *b)
+      return -1;
+    else if (*a > *b)
+      return 1;
+    else if (*a == 0)
+      return 0;
+    a++;
+    b++;
+  }
+
+  return 0;
+}
+
+// Parse a non-negative integer.
+//   result: (output) the resulting non-negative integer
+//   s: a NUL terminated string
+// Return true iff successful.
+static inline bool
+my_strtoui(int* result, const char* s) {
+  if (*s == 0)
+    return false;
+  int r = 0;
+  for (;; s++) {
+    if (*s == 0)
+      break;
+    const int old_r = r;
+    r *= 10;
+    if (*s < '0' || *s > '9')
+      return false;
+    r += *s - '0';
+    if (r < old_r)
+      return false;
+  }
+
+  *result = r;
+  return true;
+}
+
+// Return the length of the given, non-negative integer when expressed in base
+// 10.
+static inline unsigned
+my_int_len(int i) {
+  if (!i)
+    return 1;
+
+  int len = 0;
+  while (i) {
+    len++;
+    i /= 10;
+  }
+
+  return len;
+}
+
+// Convert a non-negative integer to a string
+//   output: (output) the resulting string is written here. This buffer must be
+//     large enough to hold the resulting string. Call |my_int_len| to get the
+//     required length.
+//   i: the non-negative integer to serialise.
+//   i_len: the length of the integer in base 10 (see |my_int_len|).
+static inline void
+my_itos(char* output, int i, unsigned i_len) {
+  for (unsigned index = i_len; index; --index, i /= 10)
+    output[index - 1] = '0' + (i % 10);
+}
+
+static inline const char*
+my_strchr(const char* haystack, char needle) {
+  while (*haystack && *haystack != needle)
+    haystack++;
+  if (*haystack == needle)
+    return haystack;
+  return (const char*) 0;
+}
+
+// Read a hex value
+//   result: (output) the resulting value
+//   s: a string
+// Returns a pointer to the first invalid charactor.
+static inline const char*
+my_read_hex_ptr(uintptr_t* result, const char* s) {
+  uintptr_t r = 0;
+
+  for (;; ++s) {
+    if (*s >= '0' && *s <= '9') {
+      r <<= 4;
+      r += *s - '0';
+    } else if (*s >= 'a' && *s <= 'f') {
+      r <<= 4;
+      r += (*s - 'a') + 10;
+    } else if (*s >= 'A' && *s <= 'F') {
+      r <<= 4;
+      r += (*s - 'A') + 10;
+    } else {
+      break;
+    }
+  }
+
+  *result = r;
+  return s;
+}
+
+static inline void
+my_memset(void* ip, char c, size_t len) {
+  char* p = (char *) ip;
+  while (len--)
+    *p++ = c;
+}
+
+}  // extern "C"
+
+#endif  // CLIENT_LINUX_LINUX_LIBC_SUPPORT_H_

thirdparty/breakpad/common/linux/linux_libc_support_unittest.cc

@@ -0,0 +1,153 @@
+// Copyright (c) 2009, 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.
+
+#include "common/linux/linux_libc_support.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace {
+typedef testing::Test LinuxLibcSupportTest;
+}
+
+TEST(LinuxLibcSupportTest, strlen) {
+  static const char* test_data[] = { "", "a", "aa", "aaa", "aabc", NULL };
+  for (unsigned i = 0; ; ++i) {
+    if (!test_data[i])
+      break;
+    ASSERT_EQ(strlen(test_data[i]), my_strlen(test_data[i]));
+  }
+}
+
+TEST(LinuxLibcSupportTest, strcmp) {
+  static const char* test_data[] = {
+    "", "",
+    "a", "",
+    "", "a",
+    "a", "b",
+    "a", "a",
+    "ab", "aa",
+    "abc", "ab",
+    "abc", "abc",
+    NULL,
+  };
+
+  for (unsigned i = 0; ; ++i) {
+    if (!test_data[i*2])
+      break;
+    ASSERT_EQ(my_strcmp(test_data[i*2], test_data[i*2 + 1]),
+              strcmp(test_data[i*2], test_data[i*2 + 1]));
+  }
+}
+
+TEST(LinuxLibcSupportTest, strtoui) {
+  int result;
+
+  ASSERT_FALSE(my_strtoui(&result, ""));
+  ASSERT_FALSE(my_strtoui(&result, "-1"));
+  ASSERT_FALSE(my_strtoui(&result, "-"));
+  ASSERT_FALSE(my_strtoui(&result, "a"));
+  ASSERT_FALSE(my_strtoui(&result, "23472893472938472987987398472398"));
+
+  ASSERT_TRUE(my_strtoui(&result, "0"));
+  ASSERT_EQ(result, 0);
+  ASSERT_TRUE(my_strtoui(&result, "1"));
+  ASSERT_EQ(result, 1);
+  ASSERT_TRUE(my_strtoui(&result, "12"));
+  ASSERT_EQ(result, 12);
+  ASSERT_TRUE(my_strtoui(&result, "123"));
+  ASSERT_EQ(result, 123);
+  ASSERT_TRUE(my_strtoui(&result, "0123"));
+  ASSERT_EQ(result, 123);
+}
+
+TEST(LinuxLibcSupportTest, int_len) {
+  ASSERT_EQ(my_int_len(0), 1);
+  ASSERT_EQ(my_int_len(2), 1);
+  ASSERT_EQ(my_int_len(5), 1);
+  ASSERT_EQ(my_int_len(9), 1);
+  ASSERT_EQ(my_int_len(10), 2);
+  ASSERT_EQ(my_int_len(99), 2);
+  ASSERT_EQ(my_int_len(100), 3);
+  ASSERT_EQ(my_int_len(101), 3);
+  ASSERT_EQ(my_int_len(1000), 4);
+}
+
+TEST(LinuxLibcSupportTest, itos) {
+  char buf[10];
+
+  my_itos(buf, 0, 1);
+  ASSERT_EQ(0, memcmp(buf, "0", 1));
+
+  my_itos(buf, 1, 1);
+  ASSERT_EQ(0, memcmp(buf, "1", 1));
+
+  my_itos(buf, 10, 2);
+  ASSERT_EQ(0, memcmp(buf, "10", 2));
+
+  my_itos(buf, 63, 2);
+  ASSERT_EQ(0, memcmp(buf, "63", 2));
+
+  my_itos(buf, 101, 3);
+  ASSERT_EQ(0, memcmp(buf, "101", 2));
+}
+
+TEST(LinuxLibcSupportTest, strchr) {
+  ASSERT_EQ(NULL, my_strchr("abc", 'd'));
+  ASSERT_EQ(NULL, my_strchr("", 'd'));
+  ASSERT_EQ(NULL, my_strchr("efghi", 'd'));
+
+  ASSERT_TRUE(my_strchr("a", 'a'));
+  ASSERT_TRUE(my_strchr("abc", 'a'));
+  ASSERT_TRUE(my_strchr("bcda", 'a'));
+  ASSERT_TRUE(my_strchr("sdfasdf", 'a'));
+}
+
+TEST(LinuxLibcSupportTest, read_hex_ptr) {
+  uintptr_t result;
+  const char* last;
+
+  last = my_read_hex_ptr(&result, "");
+  ASSERT_EQ(result, 0);
+  ASSERT_EQ(*last, 0);
+
+  last = my_read_hex_ptr(&result, "0");
+  ASSERT_EQ(result, 0);
+  ASSERT_EQ(*last, 0);
+
+  last = my_read_hex_ptr(&result, "0123");
+  ASSERT_EQ(result, 0x123);
+  ASSERT_EQ(*last, 0);
+
+  last = my_read_hex_ptr(&result, "0123a");
+  ASSERT_EQ(result, 0x123a);
+  ASSERT_EQ(*last, 0);
+
+  last = my_read_hex_ptr(&result, "0123a-");
+  ASSERT_EQ(result, 0x123a);
+  ASSERT_EQ(*last, '-');
+}

thirdparty/breakpad/common/linux/synth_elf.cc

@@ -0,0 +1,204 @@
+#include "common/linux/synth_elf.h"
+
+#include <assert.h>
+#include <elf.h>
+#include <stdio.h>
+#include <string.h>
+
+namespace google_breakpad {
+namespace synth_elf {
+
+#ifndef NT_GNU_BUILD_ID
+#define NT_GNU_BUILD_ID 3
+#endif
+
+ELF::ELF(uint16_t machine,
+         uint8_t file_class,
+         Endianness endianness)
+  : Section(endianness),
+    addr_size_(file_class == ELFCLASS64 ? 8 : 4),
+    program_count_(0),
+    section_count_(0),
+    section_header_table_(endianness),
+    section_header_strings_(endianness) {
+  // Could add support for more machine types here if needed.
+  assert(machine == EM_386 ||
+         machine == EM_X86_64 ||
+         machine == EM_ARM);
+  assert(file_class == ELFCLASS32 || file_class == ELFCLASS64);
+
+  start() = 0;
+  // Add ELF header
+  // e_ident
+  // EI_MAG0...EI_MAG3
+  D8(ELFMAG0);
+  D8(ELFMAG1);
+  D8(ELFMAG2);
+  D8(ELFMAG3);
+  // EI_CLASS
+  D8(file_class);
+  // EI_DATA
+  D8(endianness == kLittleEndian ? ELFDATA2LSB : ELFDATA2MSB);
+  // EI_VERSION
+  D8(EV_CURRENT);
+  // EI_OSABI
+  D8(ELFOSABI_SYSV);
+  // EI_ABIVERSION
+  D8(0);
+  // EI_PAD
+  Append(7, 0);
+  assert(Size() == EI_NIDENT);
+
+  // e_type
+  D16(ET_EXEC);  //TODO: allow passing ET_DYN?
+  // e_machine
+  D16(machine);
+  // e_version
+  D32(EV_CURRENT);
+  // e_entry
+  Append(endianness, addr_size_, 0);
+  // e_phoff
+  Append(endianness, addr_size_, program_header_label_);
+  // e_shoff
+  Append(endianness, addr_size_, section_header_label_);
+  // e_flags
+  D32(0);
+  // e_ehsize
+  D16(addr_size_ == 8 ? sizeof(Elf64_Ehdr) : sizeof(Elf32_Ehdr));
+  // e_phentsize
+  D16(addr_size_ == 8 ? sizeof(Elf64_Phdr) : sizeof(Elf32_Phdr));
+  // e_phnum
+  D16(program_count_label_);
+  // e_shentsize
+  D16(addr_size_ == 8 ? sizeof(Elf64_Shdr) : sizeof(Elf32_Shdr));
+  // e_shnum
+  D16(section_count_label_);
+  // e_shstrndx
+  D16(section_header_string_index_);
+
+  // Add an empty section for SHN_UNDEF.
+  Section shn_undef;
+  AddSection("", shn_undef, SHT_NULL);
+}
+
+int ELF::AddSection(const string& name, const Section& section,
+                    uint32_t type, uint32_t flags, uint64_t addr,
+                    uint32_t link, uint64_t entsize, uint64_t offset) {
+  Label offset_label;
+  Label string_label(section_header_strings_.Add(name));
+  size_t size = section.Size();
+
+  int index = section_count_;
+  ++section_count_;
+
+  section_header_table_
+    // sh_name
+    .D32(string_label)
+    // sh_type
+    .D32(type)
+    // sh_flags
+    .Append(endianness(), addr_size_, flags)
+    // sh_addr
+    .Append(endianness(), addr_size_, addr)
+    // sh_offset
+    .Append(endianness(), addr_size_, offset_label)
+    // sh_size
+    .Append(endianness(), addr_size_, size)
+    // sh_link
+    .D32(link)
+    // sh_info
+    .D32(0)
+    // sh_addralign
+    .Append(endianness(), addr_size_, 0)
+    // sh_entsize
+    .Append(endianness(), addr_size_, entsize);
+
+  // NULL and NOBITS sections have no content, so they
+  // don't need to be written to the file.
+  if (type == SHT_NULL) {
+    offset_label = 0;
+  } else if (type == SHT_NOBITS) {
+    offset_label = offset;
+  } else {
+    Mark(&offset_label);
+    Append(section);
+    Align(4);
+  }
+  return index;
+}
+
+void ELF::Finish() {
+  // Add the section header string table at the end.
+  section_header_string_index_ = section_count_;
+  //printf(".shstrtab size: %ld\n", section_header_strings_.Size());
+  AddSection(".shstrtab", section_header_strings_, SHT_STRTAB);
+  //printf("section_count_: %ld, sections_.size(): %ld\n",
+  //     section_count_, sections_.size());
+  section_count_label_ = section_count_;
+  program_count_label_ = program_count_;
+  // TODO:  allow adding entries to program header table
+  program_header_label_ = 0;
+
+  // Section header table starts here.
+  Mark(&section_header_label_);
+  Append(section_header_table_);
+}
+
+SymbolTable::SymbolTable(Endianness endianness,
+                         size_t addr_size,
+                         StringTable& table) : Section(endianness),
+                                               addr_size_(addr_size),
+                                               table_(table) {
+  assert(addr_size_ == 4 || addr_size_ == 8);
+}
+
+void SymbolTable::AddSymbol(const string& name, uint32_t value,
+                            uint32_t size, unsigned info, uint16_t shndx) {
+  assert(addr_size_ == 4);
+  D32(table_.Add(name));
+  D32(value);
+  D32(size);
+  D8(info);
+  D8(0); // other
+  D16(shndx);
+}
+
+void SymbolTable::AddSymbol(const string& name, uint64_t value,
+                            uint64_t size, unsigned info, uint16_t shndx) {
+  assert(addr_size_ == 8);
+  D32(table_.Add(name));
+  D8(info);
+  D8(0); // other
+  D16(shndx);
+  D64(value);
+  D64(size);
+}
+
+BuildIDNote::BuildIDNote(const uint8_t* id_bytes,
+                         size_t id_size,
+                         Endianness endianness) : Section(endianness) {
+  const char kNoteName[] = "GNU";
+  // Elf32_Nhdr and Elf64_Nhdr are exactly the same.
+  Elf32_Nhdr note_header;
+  memset(&note_header, 0, sizeof(note_header));
+  note_header.n_namesz = sizeof(kNoteName);
+  note_header.n_descsz = id_size;
+  note_header.n_type = NT_GNU_BUILD_ID;
+
+  Append(reinterpret_cast<const uint8_t*>(&note_header),
+         sizeof(note_header));
+  AppendCString(kNoteName);
+  Append(id_bytes, id_size);
+}
+
+// static
+void BuildIDNote::AppendSection(ELF& elf,
+                                const uint8_t* id_bytes,
+                                size_t id_size) {
+  const char kBuildIDSectionName[] = ".note.gnu.build-id";
+  BuildIDNote note(id_bytes, id_size, elf.endianness());
+  elf.AddSection(kBuildIDSectionName, note, SHT_NOTE);
+}
+
+}  // namespace synth_elf
+}  // namespace google_breakpad

thirdparty/breakpad/common/linux/synth_elf.h

@@ -0,0 +1,164 @@
+// -*- mode: C++ -*-
+
+// Copyright (c) 2011, 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.
+
+// Original author: Ted Mielczarek <ted.mielczarek@gmail.com>
+
+// synth_elf.h: Interface to synth_elf::ELF: fake ELF generator.
+
+#ifndef COMMON_LINUX_SYNTH_ELF_H_
+#define COMMON_LINUX_SYNTH_ELF_H_
+
+#include "common/test_assembler.h"
+
+#include <list>
+#include <map>
+#include <string>
+#include <utility>
+
+namespace google_breakpad {
+namespace synth_elf {
+
+using std::list;
+using std::map;
+using std::pair;
+using std::string;
+using test_assembler::Endianness;
+using test_assembler::kLittleEndian;
+using test_assembler::kUnsetEndian;
+using test_assembler::Label;
+using test_assembler::Section;
+
+// String tables are common in ELF headers, so subclass Section
+// to make them easy to generate.
+class StringTable : public Section {
+public:
+  StringTable(Endianness endianness = kUnsetEndian)
+  : Section(endianness) {
+    start() = 0;
+    empty_string = Add("");
+  }
+
+  // Add the string s to the string table, and return
+  // a label containing the offset into the string table
+  // at which it was added.
+  Label Add(const string& s) {
+    if (strings_.find(s) != strings_.end())
+      return strings_[s];
+
+    Label string_label(Here());
+    AppendCString(s);
+    strings_[s] = string_label;
+    return string_label;
+  }
+
+  // All StringTables contain an empty string as their first
+  // entry.
+  Label empty_string;
+
+  // Avoid inserting duplicate strings.
+  map<string,Label> strings_;
+};
+
+// A Section representing an entire ELF file.
+class ELF : public Section {
+ public:
+  ELF(uint16_t machine,    // EM_386, etc
+      uint8_t file_class,  // ELFCLASS{32,64}
+      Endianness endianness = kLittleEndian);
+
+  // Add the Section section to the section header table and append it
+  // to the file. Returns the index of the section in the section
+  // header table.
+  int AddSection(const string& name, const Section& section,
+                 uint32_t type, uint32_t flags = 0, uint64_t addr = 0,
+                 uint32_t link = 0, uint64_t entsize = 0, uint64_t offset = 0);
+                  
+  // Write out all data. GetContents may be used after this.
+  void Finish();
+
+ private:
+  // Size of an address, in bytes.
+  const size_t addr_size_;
+
+  // Offset to the program header table.
+  Label program_header_label_;
+  // Number of entries in the program header table.
+  int program_count_;
+  Label program_count_label_;
+
+  // Offset to the section header table.
+  Label section_header_label_;
+  // Number of entries in the section header table.
+  int section_count_;
+  Label section_count_label_;
+  // The section header table itself.
+  Section section_header_table_;
+
+  // Index of the section header string table in the section
+  // header table.
+  Label section_header_string_index_;
+  // Section containing the names of section header table entries.
+  StringTable section_header_strings_;
+};
+
+// A class to build .symtab or .dynsym sections.
+class SymbolTable : public Section {
+ public:
+  // table is the StringTable that contains symbol names. The caller
+  // must ensure that it remains alive for the life of the
+  // SymbolTable.
+  SymbolTable(Endianness endianness, size_t addr_size, StringTable& table);
+
+  // Add an Elf32_Sym.
+  void AddSymbol(const string& name, uint32_t value,
+                 uint32_t size, unsigned info, uint16_t shndx);
+  // Add an Elf64_Sym.
+  void AddSymbol(const string& name, uint64_t value,
+                 uint64_t size, unsigned info, uint16_t shndx);
+
+ private:
+  size_t addr_size_;
+  StringTable& table_;
+};
+
+// A class to build GNU Build ID note sections
+class BuildIDNote : public Section {
+public:
+  BuildIDNote(const uint8_t* id_bytes, size_t id_size, Endianness endianness);
+
+  // Append a new Build ID note section to |elf|.
+  static void AppendSection(ELF& elf, const uint8_t* id_bytes, size_t id_size);
+};
+
+}  // namespace synth_elf
+}  // namespace google_breakpad
+
+#endif  // COMMON_LINUX_SYNTH_ELF_H_

thirdparty/breakpad/common/linux/synth_elf_unittest.cc

@@ -0,0 +1,265 @@
+// Copyright (c) 2011 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.
+
+// Original author: Ted Mielczarek <ted.mielczarek@gmail.com>
+
+// synth_elf_unittest.cc:
+// Unittests for google_breakpad::synth_elf::ELF
+
+#include <elf.h>
+
+#include "breakpad_googletest_includes.h"
+#include "common/linux/synth_elf.h"
+
+using google_breakpad::synth_elf::ELF;
+using google_breakpad::synth_elf::StringTable;
+using google_breakpad::synth_elf::SymbolTable;
+using google_breakpad::test_assembler::Endianness;
+using google_breakpad::test_assembler::kBigEndian;
+using google_breakpad::test_assembler::kLittleEndian;
+using google_breakpad::test_assembler::Label;
+using std::string;
+using ::testing::Test;
+
+class StringTableTest : public Test {
+public:
+  StringTableTest() : table(kLittleEndian) {}
+
+  StringTable table;
+};
+
+TEST_F(StringTableTest, Empty) {
+  EXPECT_EQ(1, table.Size());
+  string contents;
+  ASSERT_TRUE(table.GetContents(&contents));
+  const char* kExpectedContents = "\0";
+  EXPECT_EQ(0, memcmp(kExpectedContents,
+                      contents.c_str(),
+                      contents.size()));
+  ASSERT_TRUE(table.empty_string.IsKnownConstant());
+  EXPECT_EQ(0, table.empty_string.Value());
+}
+
+TEST_F(StringTableTest, Basic) {
+  const string s1("table fills with strings");
+  const string s2("offsets preserved as labels");
+  const string s3("verified with tests");
+  const char* kExpectedContents = 
+    "\0table fills with strings\0"
+    "offsets preserved as labels\0"
+    "verified with tests\0";
+  Label l1(table.Add(s1));
+  Label l2(table.Add(s2));
+  Label l3(table.Add(s3));
+  string contents;
+  ASSERT_TRUE(table.GetContents(&contents));
+  EXPECT_EQ(0, memcmp(kExpectedContents,
+                      contents.c_str(),
+                      contents.size()));
+  // empty_string is at zero, other strings start at 1.
+  ASSERT_TRUE(l1.IsKnownConstant());
+  EXPECT_EQ(1, l1.Value());
+  // Each string has an extra byte for a trailing null.
+  EXPECT_EQ(1 + s1.length() + 1, l2.Value());
+  EXPECT_EQ(1 + s1.length() + 1 + s2.length() + 1, l3.Value());
+}
+
+TEST_F(StringTableTest, Duplicates) {
+  const string s1("string 1");
+  const string s2("string 2");
+  const string s3("");
+  const char* kExpectedContents = "\0string 1\0string 2\0";
+  Label l1(table.Add(s1));
+  Label l2(table.Add(s2));
+  // Adding strings twice should return the same Label.
+  Label l3(table.Add(s3));
+  Label l4(table.Add(s2));
+  string contents;
+  ASSERT_TRUE(table.GetContents(&contents));
+  EXPECT_EQ(0, memcmp(kExpectedContents,
+                      contents.c_str(),
+                      contents.size()));
+  EXPECT_EQ(0, table.empty_string.Value());
+  EXPECT_EQ(table.empty_string.Value(), l3.Value());
+  EXPECT_EQ(l2.Value(), l4.Value());
+}
+
+class SymbolTableTest : public Test {};
+
+TEST_F(SymbolTableTest, Simple32) {
+  StringTable table(kLittleEndian);
+  SymbolTable syms(kLittleEndian, 4, table);
+
+  const string kFuncName1 = "superfunc";
+  const uint32_t kFuncAddr1 = 0x10001000;
+  const uint32_t kFuncSize1 = 0x10;
+  const string kFuncName2 = "awesomefunc";
+  const uint32_t kFuncAddr2 = 0x20002000;
+  const uint32_t kFuncSize2 = 0x2f;
+  const string kFuncName3 = "megafunc";
+  const uint32_t kFuncAddr3 = 0x30003000;
+  const uint32_t kFuncSize3 = 0x3c;
+
+  syms.AddSymbol(kFuncName1, kFuncAddr1, kFuncSize1,
+                 ELF32_ST_INFO(STB_GLOBAL, STT_FUNC),
+                 SHN_UNDEF + 1);
+  syms.AddSymbol(kFuncName2, kFuncAddr2, kFuncSize2,
+                 ELF32_ST_INFO(STB_LOCAL, STT_FUNC),
+                 SHN_UNDEF + 2);
+  syms.AddSymbol(kFuncName3, kFuncAddr3, kFuncSize3,
+                 ELF32_ST_INFO(STB_LOCAL, STT_FUNC),
+                 SHN_UNDEF + 3);
+
+  const char kExpectedStringTable[] = "\0superfunc\0awesomefunc\0megafunc";
+  const size_t kExpectedStringTableSize = sizeof(kExpectedStringTable);
+  EXPECT_EQ(kExpectedStringTableSize, table.Size());
+  string table_contents;
+  table.GetContents(&table_contents);
+  EXPECT_EQ(0, memcmp(kExpectedStringTable,
+                      table_contents.c_str(),
+                      table_contents.size()));
+
+  const uint8_t kExpectedSymbolContents[] = {
+    // Symbol 1
+    0x01, 0x00, 0x00, 0x00, // name
+    0x00, 0x10, 0x00, 0x10, // value
+    0x10, 0x00, 0x00, 0x00, // size
+    ELF32_ST_INFO(STB_GLOBAL, STT_FUNC), // info
+    0x00, // other
+    0x01, 0x00, // shndx
+    // Symbol 2
+    0x0B, 0x00, 0x00, 0x00, // name
+    0x00, 0x20, 0x00, 0x20, // value
+    0x2f, 0x00, 0x00, 0x00, // size
+    ELF32_ST_INFO(STB_LOCAL, STT_FUNC), // info
+    0x00, // other
+    0x02, 0x00, // shndx
+    // Symbol 3
+    0x17, 0x00, 0x00, 0x00, // name
+    0x00, 0x30, 0x00, 0x30, // value
+    0x3c, 0x00, 0x00, 0x00, // size
+    ELF32_ST_INFO(STB_LOCAL, STT_FUNC), // info
+    0x00, // other
+    0x03, 0x00, // shndx
+  };
+  const size_t kExpectedSymbolSize = sizeof(kExpectedSymbolContents);
+  EXPECT_EQ(kExpectedSymbolSize, syms.Size());
+
+  string symbol_contents;
+  syms.GetContents(&symbol_contents);
+  EXPECT_EQ(0, memcmp(kExpectedSymbolContents,
+                      symbol_contents.c_str(),
+                      symbol_contents.size()));
+}
+
+class BasicElf : public Test {};
+
+// Doesn't seem worthwhile writing the tests to be endian-independent
+// when they're unlikely to ever be run on big-endian systems.
+#if defined(__i386__) || defined(__x86_64__)
+
+TEST_F(BasicElf, EmptyLE32) {
+  const size_t kStringTableSize = sizeof("\0.shstrtab");
+  const size_t kStringTableAlign = 4 - kStringTableSize % 4;
+  const size_t kExpectedSize = sizeof(Elf32_Ehdr) +
+    // Two sections, SHT_NULL + the section header string table.
+    2 * sizeof(Elf32_Shdr) +
+    kStringTableSize + kStringTableAlign;
+
+  ELF elf(EM_386, ELFCLASS32, kLittleEndian);
+  elf.Finish();
+  EXPECT_EQ(kExpectedSize, elf.Size());
+
+  string contents;
+  ASSERT_TRUE(elf.GetContents(&contents));
+  ASSERT_EQ(kExpectedSize, contents.size());
+  const Elf32_Ehdr* header =
+    reinterpret_cast<const Elf32_Ehdr*>(contents.data());
+  const uint8_t kIdent[] = {
+    ELFMAG0, ELFMAG1, ELFMAG2, ELFMAG3,
+    ELFCLASS32, ELFDATA2LSB, EV_CURRENT, ELFOSABI_SYSV,
+    0, 0, 0, 0, 0, 0, 0, 0
+  };
+  EXPECT_EQ(0, memcmp(kIdent, header->e_ident, sizeof(kIdent)));
+  EXPECT_EQ(ET_EXEC, header->e_type);
+  EXPECT_EQ(EM_386, header->e_machine);
+  EXPECT_EQ(EV_CURRENT, header->e_version);
+  EXPECT_EQ(0, header->e_entry);
+  EXPECT_EQ(0, header->e_phoff);
+  EXPECT_EQ(sizeof(Elf32_Ehdr) + kStringTableSize + kStringTableAlign,
+            header->e_shoff);
+  EXPECT_EQ(0, header->e_flags);
+  EXPECT_EQ(sizeof(Elf32_Ehdr), header->e_ehsize);
+  EXPECT_EQ(sizeof(Elf32_Phdr), header->e_phentsize);
+  EXPECT_EQ(0, header->e_phnum);
+  EXPECT_EQ(sizeof(Elf32_Shdr), header->e_shentsize);
+  EXPECT_EQ(2, header->e_shnum);
+  EXPECT_EQ(1, header->e_shstrndx);
+}
+
+TEST_F(BasicElf, EmptyLE64) {
+  const size_t kStringTableSize = sizeof("\0.shstrtab");
+  const size_t kStringTableAlign = 4 - kStringTableSize % 4;
+  const size_t kExpectedSize = sizeof(Elf64_Ehdr) +
+    // Two sections, SHT_NULL + the section header string table.
+    2 * sizeof(Elf64_Shdr) +
+    kStringTableSize + kStringTableAlign;
+
+  ELF elf(EM_X86_64, ELFCLASS64, kLittleEndian);
+  elf.Finish();
+  EXPECT_EQ(kExpectedSize, elf.Size());
+
+  string contents;
+  ASSERT_TRUE(elf.GetContents(&contents));
+  ASSERT_EQ(kExpectedSize, contents.size());
+  const Elf64_Ehdr* header =
+    reinterpret_cast<const Elf64_Ehdr*>(contents.data());
+  const uint8_t kIdent[] = {
+    ELFMAG0, ELFMAG1, ELFMAG2, ELFMAG3,
+    ELFCLASS64, ELFDATA2LSB, EV_CURRENT, ELFOSABI_SYSV,
+    0, 0, 0, 0, 0, 0, 0, 0
+  };
+  EXPECT_EQ(0, memcmp(kIdent, header->e_ident, sizeof(kIdent)));
+  EXPECT_EQ(ET_EXEC, header->e_type);
+  EXPECT_EQ(EM_X86_64, header->e_machine);
+  EXPECT_EQ(EV_CURRENT, header->e_version);
+  EXPECT_EQ(0, header->e_entry);
+  EXPECT_EQ(0, header->e_phoff);
+  EXPECT_EQ(sizeof(Elf64_Ehdr) + kStringTableSize + kStringTableAlign,
+            header->e_shoff);
+  EXPECT_EQ(0, header->e_flags);
+  EXPECT_EQ(sizeof(Elf64_Ehdr), header->e_ehsize);
+  EXPECT_EQ(sizeof(Elf64_Phdr), header->e_phentsize);
+  EXPECT_EQ(0, header->e_phnum);
+  EXPECT_EQ(sizeof(Elf64_Shdr), header->e_shentsize);
+  EXPECT_EQ(2, header->e_shnum);
+  EXPECT_EQ(1, header->e_shstrndx);
+}
+
+#endif  // defined(__i386__) || defined(__x86_64__)