| // Copyright 2012 The Chromium Authors |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "base/system/sys_info.h" |
| |
| #include <stddef.h> |
| #include <stdint.h> |
| #include <sys/system_properties.h> |
| |
| #include "base/android/sys_utils.h" |
| #include "base/lazy_instance.h" |
| #include "base/logging.h" |
| #include "base/strings/string_number_conversions.h" |
| #include "base/strings/string_piece.h" |
| #include "base/strings/string_util.h" |
| #include "base/strings/stringprintf.h" |
| #include "base/system/sys_info_internal.h" |
| |
| namespace { |
| |
| // Default version of Android to fall back to when actual version numbers |
| // cannot be acquired. Use the latest Android release with a higher bug fix |
| // version to avoid unnecessarily comparison errors with the latest release. |
| // This should be manually kept up to date on each Android release. |
| const int kDefaultAndroidMajorVersion = 12; |
| const int kDefaultAndroidMinorVersion = 0; |
| const int kDefaultAndroidBugfixVersion = 99; |
| |
| // Get and parse out the OS version numbers from the system properties. |
| // Note if parse fails, the "default" version is returned as fallback. |
| void GetOsVersionStringAndNumbers(std::string* version_string, |
| int32_t* major_version, |
| int32_t* minor_version, |
| int32_t* bugfix_version) { |
| // Read the version number string out from the properties. |
| char os_version_str[PROP_VALUE_MAX]; |
| __system_property_get("ro.build.version.release", os_version_str); |
| |
| if (os_version_str[0]) { |
| // Try to parse out the version numbers from the string. |
| int num_read = sscanf(os_version_str, "%d.%d.%d", major_version, |
| minor_version, bugfix_version); |
| |
| if (num_read > 0) { |
| // If we don't have a full set of version numbers, make the extras 0. |
| if (num_read < 2) |
| *minor_version = 0; |
| if (num_read < 3) |
| *bugfix_version = 0; |
| *version_string = std::string(os_version_str); |
| return; |
| } |
| } |
| |
| // For some reason, we couldn't parse the version number string. |
| *major_version = kDefaultAndroidMajorVersion; |
| *minor_version = kDefaultAndroidMinorVersion; |
| *bugfix_version = kDefaultAndroidBugfixVersion; |
| *version_string = ::base::StringPrintf("%d.%d.%d", *major_version, |
| *minor_version, *bugfix_version); |
| } |
| |
| // Parses a system property (specified with unit 'k','m' or 'g'). |
| // Returns a value in bytes. |
| // Returns -1 if the string could not be parsed. |
| int64_t ParseSystemPropertyBytes(const base::StringPiece& str) { |
| const int64_t KB = 1024; |
| const int64_t MB = 1024 * KB; |
| const int64_t GB = 1024 * MB; |
| if (str.size() == 0u) |
| return -1; |
| int64_t unit_multiplier = 1; |
| size_t length = str.size(); |
| if (str[length - 1] == 'k') { |
| unit_multiplier = KB; |
| length--; |
| } else if (str[length - 1] == 'm') { |
| unit_multiplier = MB; |
| length--; |
| } else if (str[length - 1] == 'g') { |
| unit_multiplier = GB; |
| length--; |
| } |
| int64_t result = 0; |
| bool parsed = base::StringToInt64(str.substr(0, length), &result); |
| bool negative = result <= 0; |
| bool overflow = |
| result >= std::numeric_limits<int64_t>::max() / unit_multiplier; |
| if (!parsed || negative || overflow) |
| return -1; |
| return result * unit_multiplier; |
| } |
| |
| int GetDalvikHeapSizeMB() { |
| char heap_size_str[PROP_VALUE_MAX]; |
| __system_property_get("dalvik.vm.heapsize", heap_size_str); |
| // dalvik.vm.heapsize property is writable by a root user. |
| // Clamp it to reasonable range as a sanity check, |
| // a typical android device will never have less than 48MB. |
| const int64_t MB = 1024 * 1024; |
| int64_t result = ParseSystemPropertyBytes(heap_size_str); |
| if (result == -1) { |
| // We should consider not exposing these values if they are not reliable. |
| LOG(ERROR) << "Can't parse dalvik.vm.heapsize: " << heap_size_str; |
| result = base::SysInfo::AmountOfPhysicalMemoryMB() / 3; |
| } |
| result = |
| std::min<int64_t>(std::max<int64_t>(32 * MB, result), 1024 * MB) / MB; |
| return static_cast<int>(result); |
| } |
| |
| int GetDalvikHeapGrowthLimitMB() { |
| char heap_size_str[PROP_VALUE_MAX]; |
| __system_property_get("dalvik.vm.heapgrowthlimit", heap_size_str); |
| // dalvik.vm.heapgrowthlimit property is writable by a root user. |
| // Clamp it to reasonable range as a sanity check, |
| // a typical android device will never have less than 24MB. |
| const int64_t MB = 1024 * 1024; |
| int64_t result = ParseSystemPropertyBytes(heap_size_str); |
| if (result == -1) { |
| // We should consider not exposing these values if they are not reliable. |
| LOG(ERROR) << "Can't parse dalvik.vm.heapgrowthlimit: " << heap_size_str; |
| result = base::SysInfo::AmountOfPhysicalMemoryMB() / 6; |
| } |
| result = std::min<int64_t>(std::max<int64_t>(16 * MB, result), 512 * MB) / MB; |
| return static_cast<int>(result); |
| } |
| |
| std::string HardwareManufacturerName() { |
| char device_model_str[PROP_VALUE_MAX]; |
| __system_property_get("ro.product.manufacturer", device_model_str); |
| return std::string(device_model_str); |
| } |
| |
| } // anonymous namespace |
| |
| namespace base { |
| |
| std::string SysInfo::HardwareModelName() { |
| char device_model_str[PROP_VALUE_MAX]; |
| __system_property_get("ro.product.model", device_model_str); |
| return std::string(device_model_str); |
| } |
| |
| std::string SysInfo::OperatingSystemName() { |
| return "Android"; |
| } |
| |
| std::string SysInfo::OperatingSystemVersion() { |
| std::string version_string; |
| int32_t major, minor, bugfix; |
| GetOsVersionStringAndNumbers(&version_string, &major, &minor, &bugfix); |
| return version_string; |
| } |
| |
| void SysInfo::OperatingSystemVersionNumbers(int32_t* major_version, |
| int32_t* minor_version, |
| int32_t* bugfix_version) { |
| std::string version_string; |
| GetOsVersionStringAndNumbers(&version_string, major_version, minor_version, |
| bugfix_version); |
| } |
| |
| std::string SysInfo::GetAndroidBuildCodename() { |
| char os_version_codename_str[PROP_VALUE_MAX]; |
| __system_property_get("ro.build.version.codename", os_version_codename_str); |
| return std::string(os_version_codename_str); |
| } |
| |
| std::string SysInfo::GetAndroidBuildID() { |
| char os_build_id_str[PROP_VALUE_MAX]; |
| __system_property_get("ro.build.id", os_build_id_str); |
| return std::string(os_build_id_str); |
| } |
| |
| std::string SysInfo::GetAndroidHardwareEGL() { |
| char os_hardware_egl_str[PROP_VALUE_MAX]; |
| __system_property_get("ro.hardware.egl", os_hardware_egl_str); |
| return std::string(os_hardware_egl_str); |
| } |
| |
| int SysInfo::DalvikHeapSizeMB() { |
| static int heap_size = GetDalvikHeapSizeMB(); |
| return heap_size; |
| } |
| |
| int SysInfo::DalvikHeapGrowthLimitMB() { |
| static int heap_growth_limit = GetDalvikHeapGrowthLimitMB(); |
| return heap_growth_limit; |
| } |
| |
| static base::LazyInstance<base::internal::LazySysInfoValue< |
| bool, |
| android::SysUtils::IsLowEndDeviceFromJni>>::Leaky g_lazy_low_end_device = |
| LAZY_INSTANCE_INITIALIZER; |
| |
| bool SysInfo::IsLowEndDeviceImpl() { |
| // This code might be used in some environments |
| // which might not have a Java environment. |
| // Note that we need to call the Java version here. |
| // There exists a complete native implementation in |
| // sys_info.cc but calling that here would mean that |
| // the Java code and the native code would call different |
| // implementations which could give different results. |
| // Also the Java code cannot depend on the native code |
| // since it might not be loaded yet. |
| if (!base::android::IsVMInitialized()) |
| return false; |
| return g_lazy_low_end_device.Get().value(); |
| } |
| |
| // static |
| SysInfo::HardwareInfo SysInfo::GetHardwareInfoSync() { |
| HardwareInfo info; |
| info.manufacturer = HardwareManufacturerName(); |
| info.model = HardwareModelName(); |
| DCHECK(IsStringUTF8(info.manufacturer)); |
| DCHECK(IsStringUTF8(info.model)); |
| return info; |
| } |
| |
| } // namespace base |