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// Copyright 2016 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"
#import <Foundation/Foundation.h>
#include <mach/mach_host.h>
#include <mach/mach_init.h>
#include <stddef.h>
#include <stdint.h>
#include <sys/sysctl.h>
#include <sys/types.h>
#include <optional>
#include <string_view>
#include "base/apple/scoped_mach_port.h"
#include "base/check_op.h"
#include "base/feature_list.h"
#include "base/mac/mac_util.h"
#include "base/no_destructor.h"
#include "base/notreached.h"
#include "base/numerics/safe_conversions.h"
#include "base/posix/sysctl.h"
#include "base/process/process_metrics.h"
#include "base/strings/string_number_conversions.h"
#include "base/strings/string_util.h"
#include "base/strings/stringprintf.h"
#include "base/synchronization/lock.h"
#include "base/system/sys_info_internal.h"
namespace base {
namespace {
// Whether this process has CPU security mitigations enabled.
bool g_is_cpu_security_mitigation_enabled = false;
// Whether NumberOfProcessors() was called. Used to detect when the CPU security
// mitigations state changes after a call to NumberOfProcessors().
bool g_is_cpu_security_mitigation_enabled_read = false;
} // namespace
namespace internal {
std::optional<int> NumberOfPhysicalProcessors() {
return GetSysctlIntValue("hw.physicalcpu_max");
}
std::optional<int> NumberOfProcessorsWhenCpuSecurityMitigationEnabled() {
g_is_cpu_security_mitigation_enabled_read = true;
if (!g_is_cpu_security_mitigation_enabled ||
!FeatureList::IsEnabled(kNumberOfCoresWithCpuSecurityMitigation)) {
return std::nullopt;
}
return NumberOfPhysicalProcessors();
}
} // namespace internal
BASE_FEATURE(kNumberOfCoresWithCpuSecurityMitigation,
"NumberOfCoresWithCpuSecurityMitigation",
FEATURE_ENABLED_BY_DEFAULT);
// static
std::string SysInfo::OperatingSystemName() {
return "Mac OS X";
}
// static
std::string SysInfo::OperatingSystemVersion() {
int32_t major, minor, bugfix;
OperatingSystemVersionNumbers(&major, &minor, &bugfix);
return base::StringPrintf("%d.%d.%d", major, minor, bugfix);
}
// static
void SysInfo::OperatingSystemVersionNumbers(int32_t* major_version,
int32_t* minor_version,
int32_t* bugfix_version) {
NSOperatingSystemVersion version =
NSProcessInfo.processInfo.operatingSystemVersion;
*major_version = saturated_cast<int32_t>(version.majorVersion);
*minor_version = saturated_cast<int32_t>(version.minorVersion);
*bugfix_version = saturated_cast<int32_t>(version.patchVersion);
}
// static
std::string SysInfo::OperatingSystemArchitecture() {
switch (mac::GetCPUType()) {
case mac::CPUType::kIntel:
return "x86_64";
case mac::CPUType::kTranslatedIntel:
case mac::CPUType::kArm:
return "arm64";
}
}
// static
uint64_t SysInfo::AmountOfAvailablePhysicalMemoryImpl() {
SystemMemoryInfoKB info;
if (!GetSystemMemoryInfo(&info)) {
return 0;
}
// We should add inactive file-backed memory also but there is no such
// information from Mac OS unfortunately.
return checked_cast<uint64_t>(info.free + info.speculative) * 1024;
}
// static
std::string SysInfo::CPUModelName() {
return StringSysctlByName("machdep.cpu.brand_string").value_or(std::string{});
}
// static
std::string SysInfo::HardwareModelName() {
// Note that there is lots of code out there that uses "hw.model", but that is
// deprecated in favor of "hw.product" as used here. See the sysctl.h file for
// more info.
return StringSysctl({CTL_HW, HW_PRODUCT}).value_or(std::string{});
}
// static
std::optional<SysInfo::HardwareModelNameSplit>
SysInfo::SplitHardwareModelNameDoNotUse(std::string_view name) {
size_t number_loc = name.find_first_of("0123456789");
if (number_loc == std::string::npos) {
return std::nullopt;
}
size_t comma_loc = name.find(',', number_loc);
if (comma_loc == std::string::npos) {
return std::nullopt;
}
HardwareModelNameSplit split;
if (!StringToInt(name.substr(0u, comma_loc).substr(number_loc),
&split.model) ||
!StringToInt(name.substr(comma_loc + 1), &split.variant)) {
return std::nullopt;
}
split.category = name.substr(0u, number_loc);
return split;
}
// static
SysInfo::HardwareInfo SysInfo::GetHardwareInfoSync() {
HardwareInfo info;
info.manufacturer = "Apple Inc.";
info.model = HardwareModelName();
DCHECK(IsStringUTF8(info.manufacturer));
DCHECK(IsStringUTF8(info.model));
return info;
}
// static
void SysInfo::SetCpuSecurityMitigationsEnabled() {
// Setting `g_is_cpu_security_mitigation_enabled_read` after it has been read
// is disallowed because it could indicate that some code got a number of
// processor computed without all the required state.
CHECK(!g_is_cpu_security_mitigation_enabled_read);
g_is_cpu_security_mitigation_enabled = true;
}
// static
void SysInfo::ResetCpuSecurityMitigationsEnabledForTesting() {
g_is_cpu_security_mitigation_enabled_read = false;
g_is_cpu_security_mitigation_enabled = false;
}
} // namespace base
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