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// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifdef UNSAFE_BUFFERS_BUILD
// TODO(crbug.com/351564777): Remove this and convert code to safer constructs.
#pragma allow_unsafe_buffers
#endif
#include "extensions/browser/api/system_cpu/cpu_info_provider.h"
#include <mach/mach_host.h>
#include "base/apple/scoped_mach_port.h"
#include "base/mac/mac_util.h"
#include "base/system/sys_info.h"
namespace extensions {
bool CpuInfoProvider::QueryCpuTimePerProcessor(
std::vector<api::system_cpu::ProcessorInfo>* infos) {
if (base::mac::GetCPUType() == base::mac::CPUType::kTranslatedIntel) {
// In writing Rosetta, Apple needed to stop simulating an x86 environment
// somewhere, and they did so before they got to `host_processor_info()`.
// `host_processor_info()` is a Mach call to a host server in the kernel,
// and that server does not maintain data corresponding to the simulated
// processors. See https://crbug.com/1138707#c42 for details. See also
// FB8832191.
return false;
}
DCHECK(infos);
natural_t num_of_processors;
base::apple::ScopedMachSendRight host(mach_host_self());
mach_msg_type_number_t type;
processor_cpu_load_info_data_t* cpu_infos;
if (host_processor_info(host.get(), PROCESSOR_CPU_LOAD_INFO,
&num_of_processors,
reinterpret_cast<processor_info_array_t*>(&cpu_infos),
&type) == KERN_SUCCESS) {
DCHECK_EQ(num_of_processors,
static_cast<natural_t>(base::SysInfo::NumberOfProcessors()));
DCHECK_EQ(num_of_processors, static_cast<natural_t>(infos->size()));
for (natural_t i = 0; i < num_of_processors; ++i) {
double user = static_cast<double>(cpu_infos[i].cpu_ticks[CPU_STATE_USER]),
sys =
static_cast<double>(cpu_infos[i].cpu_ticks[CPU_STATE_SYSTEM]),
nice = static_cast<double>(cpu_infos[i].cpu_ticks[CPU_STATE_NICE]),
idle = static_cast<double>(cpu_infos[i].cpu_ticks[CPU_STATE_IDLE]);
infos->at(i).usage.kernel = sys;
infos->at(i).usage.user = user + nice;
infos->at(i).usage.idle = idle;
infos->at(i).usage.total = sys + user + nice + idle;
}
vm_deallocate(mach_task_self(), reinterpret_cast<vm_address_t>(cpu_infos),
num_of_processors * sizeof(processor_cpu_load_info));
return true;
}
return false;
}
} // namespace extensions
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