| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "base/sys_info.h" |
| |
| #include <sys/system_properties.h> |
| |
| #include "base/logging.h" |
| #include "base/string_number_conversions.h" |
| #include "base/string_piece.h" |
| |
| namespace { |
| |
| int ParseHeapSize(const base::StringPiece& str) { |
| const int64 KB = 1024; |
| const int64 MB = 1024 * KB; |
| const int64 GB = 1024 * MB; |
| CHECK_GT(str.size(), 0u); |
| int64 factor = 1; |
| size_t length = str.size(); |
| if (str[length - 1] == 'k') { |
| factor = KB; |
| length--; |
| } else if (str[length - 1] == 'm') { |
| factor = MB; |
| length--; |
| } else if (str[length - 1] == 'g') { |
| factor = GB; |
| length--; |
| } else { |
| CHECK('0' <= str[length - 1] && str[length - 1] <= '9'); |
| } |
| int64 result = 0; |
| bool parsed = base::StringToInt64(str.substr(0, length), &result); |
| CHECK(parsed); |
| result = result * factor / MB; |
| // dalvik.vm.heapsize property is writable by user, |
| // truncate it to reasonable value to avoid overflows later. |
| result = std::min<int64>(std::max<int64>(32, result), 1024); |
| return static_cast<int>(result); |
| } |
| |
| int GetDalvikHeapSizeMB() { |
| char heap_size_str[PROP_VALUE_MAX]; |
| __system_property_get("dalvik.vm.heapsize", heap_size_str); |
| return ParseHeapSize(heap_size_str); |
| } |
| |
| } // anonymous namespace |
| |
| namespace base { |
| |
| int SysInfo::DalvikHeapSizeMB() { |
| static int heap_size = GetDalvikHeapSizeMB(); |
| return heap_size; |
| } |
| |
| } // namespace base |