base/trace_event/memory_allocator_dump_guid.cc

   1 // Copyright 2015 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/trace_event/memory_allocator_dump_guid.h"
   6
   7 #include "base/format_macros.h"
   8 #include "base/sha1.h"
   9 #include "base/strings/stringprintf.h"
  10
  11 namespace base {
  12 namespace trace_event {
  13
  14 namespace {
  15 uint64 HashString(const std::string& str) {
  16   uint64 hash[(kSHA1Length + sizeof(uint64) - 1) / sizeof(uint64)] = { 0 };
  17   SHA1HashBytes(reinterpret_cast<const unsigned char*>(str.data()), str.size(),
  18                 reinterpret_cast<unsigned char*>(hash));
  19   return hash[0];
  20 }
  21 }  // namespace
  22
  23 MemoryAllocatorDumpGuid::MemoryAllocatorDumpGuid(uint64 guid) : guid_(guid) {
  24 }
  25
  26 MemoryAllocatorDumpGuid::MemoryAllocatorDumpGuid()
  27     : MemoryAllocatorDumpGuid(0u) {
  28 }
  29
  30 MemoryAllocatorDumpGuid::MemoryAllocatorDumpGuid(const std::string& guid_str)
  31     : MemoryAllocatorDumpGuid(HashString(guid_str)) {
  32 }
  33
  34 std::string MemoryAllocatorDumpGuid::ToString() const {
  35   return StringPrintf("%" PRIx64, guid_);
  36 }
  37
  38 }  // namespace trace_event
  39 }  // namespace base