The Tor Browser: toolkit/crashreporter/google-breakpad/src/common/solaris/file

toolkit/crashreporter/google-breakpad/src/common/solaris/file_id.cc@129ffea94266 (annotated)

toolkit/crashreporter/google-breakpad/src/common/solaris/file_id.cc

Sat, 03 Jan 2015 20:18:00 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Sat, 03 Jan 2015 20:18:00 +0100
branch: TOR_BUG_3246
changeset 7: 129ffea94266
permissions: -rw-r--r--

Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.

 // Copyright (c) 2007, 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
 //
 // Author: Alfred Peng
 #include <elf.h>
 #include <fcntl.h>
 #include <gelf.h>
 #include <sys/mman.h>
 #include <sys/ksyms.h>
 #include <stdio.h>
 #include <string.h>
 #include <unistd.h>
 #include <cassert>
 #include <cstdio>
 #include "common/md5.h"
 #include "common/solaris/file_id.h"
 #include "common/solaris/message_output.h"
 #include "google_breakpad/common/minidump_format.h"
 namespace google_breakpad {
 class AutoElfEnder {
  public:
   AutoElfEnder(Elf *elf) : elf_(elf) {}
   ~AutoElfEnder() { if (elf_) elf_end(elf_); }
  private:
   Elf *elf_;
 };
 // Find the text section in elf object file.
 // Return the section start address and the size.
 static bool FindElfTextSection(int fd, const void *elf_base,
                                const void **text_start,
                                int *text_size) {
   assert(text_start);
   assert(text_size);
   *text_start = NULL;
   *text_size = 0;
   if (elf_version(EV_CURRENT) == EV_NONE) {
     print_message2(2, "elf_version() failed: %s\n", elf_errmsg(0));
     return false;
   }
   GElf_Ehdr elf_header;
   lseek(fd, 0L, 0);
   Elf *elf = elf_begin(fd, ELF_C_READ, NULL);
   AutoElfEnder elfEnder(elf);
   if (gelf_getehdr(elf, &elf_header) == (GElf_Ehdr *)NULL) {
     print_message2(2, "failed to read elf header: %s\n", elf_errmsg(-1));
     return false;
   }
   if (elf_header.e_ident[EI_MAG0] != ELFMAG0 ||
       elf_header.e_ident[EI_MAG1] != ELFMAG1 ||
       elf_header.e_ident[EI_MAG2] != ELFMAG2 ||
       elf_header.e_ident[EI_MAG3] != ELFMAG3) {
     print_message1(2, "header magic doesn't match\n");
     return false;
   }
   static const char kTextSectionName[] = ".text";
   const GElf_Shdr *text_section = NULL;
   Elf_Scn *scn = NULL;
   GElf_Shdr shdr;
   while ((scn = elf_nextscn(elf, scn)) != NULL) {
     if (gelf_getshdr(scn, &shdr) == (GElf_Shdr *)0) {
       print_message2(2, "failed to read section header: %s\n", elf_errmsg(0));
       return false;
     }
     if (shdr.sh_type == SHT_PROGBITS) {
       const char *section_name = elf_strptr(elf, elf_header.e_shstrndx,
                                             shdr.sh_name);
       if (!section_name) {
         print_message2(2, "Section name error: %s\n", elf_errmsg(-1));
         continue;
       }
       if (strcmp(section_name, kTextSectionName) == 0) {
         text_section = &shdr;
         break;
       }
     }
   }
   if (text_section != NULL && text_section->sh_size > 0) {
     *text_start = (char *)elf_base + text_section->sh_offset;
     *text_size = text_section->sh_size;
     return true;
   }
   return false;
 }
 FileID::FileID(const char *path) {
   strcpy(path_, path);
 }
 class AutoCloser {
  public:
   AutoCloser(int fd) : fd_(fd) {}
   ~AutoCloser() { if (fd_) close(fd_); }
  private:
   int fd_;
 };
 bool FileID::ElfFileIdentifier(unsigned char identifier[16]) {
   int fd = 0;
   if ((fd = open(path_, O_RDONLY)) < 0)
     return false;
   AutoCloser autocloser(fd);
   struct stat st;
   if (fstat(fd, &st) != 0 || st.st_size <= 0)
     return false;
   void *base = mmap(NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
   if (base == MAP_FAILED)
     return false;
   bool success = false;
   const void *text_section = NULL;
   int text_size = 0;
   if (FindElfTextSection(fd, base, &text_section, &text_size)) {
     MD5Context md5;
     MD5Init(&md5);
     MD5Update(&md5, (const unsigned char *)text_section, text_size);
     MD5Final(identifier, &md5);
     success = true;
   }
   munmap((char *)base, st.st_size);
   return success;
 }
 // static
 bool FileID::ConvertIdentifierToString(const unsigned char identifier[16],
                                        char *buffer, int buffer_length) {
   if (buffer_length < 34)
     return false;
   int buffer_idx = 0;
   for (int idx = 0; idx < 16; ++idx) {
     int hi = (identifier[idx] >> 4) & 0x0F;
     int lo = (identifier[idx]) & 0x0F;
     buffer[buffer_idx++] = (hi >= 10) ? 'A' + hi - 10 : '0' + hi;
     buffer[buffer_idx++] = (lo >= 10) ? 'A' + lo - 10 : '0' + lo;
   }
   // Add an extra "0" by the end.
   buffer[buffer_idx++] = '0';
   // NULL terminate
   buffer[buffer_idx] = 0;
   return true;
 }
 }  // namespace google_breakpad

The Tor Browser / annotate

toolkit/crashreporter/google-breakpad/src/common/solaris/file_id.cc@129ffea94266 (annotated)

toolkit/crashreporter/google-breakpad/src/common/solaris/file_id.cc