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// Copyright (c) 2013 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/process/process_metrics.h"
#include <limits.h>
#include <mach/task.h>
#include <malloc/malloc.h>
#include <stddef.h>
#include "base/check_op.h"
#include "base/mac/scoped_mach_port.h"
#include "base/memory/ptr_util.h"
#include "base/notreached.h"
#include "base/numerics/safe_conversions.h"
namespace base {
ProcessMetrics::ProcessMetrics(ProcessHandle process) {}
ProcessMetrics::~ProcessMetrics() {}
// static
std::unique_ptr<ProcessMetrics> ProcessMetrics::CreateProcessMetrics(
ProcessHandle process) {
return WrapUnique(new ProcessMetrics(process));
}
TimeDelta ProcessMetrics::GetCumulativeCPUUsage() {
NOTIMPLEMENTED();
return TimeDelta();
}
bool ProcessMetrics::GetCumulativeCPUUsagePerThread(CPUUsagePerThread&) {
NOTIMPLEMENTED();
return false;
}
size_t GetMaxFds() {
static const rlim_t kSystemDefaultMaxFds = 256;
rlim_t max_fds;
struct rlimit nofile;
if (getrlimit(RLIMIT_NOFILE, &nofile)) {
// Error case: Take a best guess.
max_fds = kSystemDefaultMaxFds;
} else {
max_fds = nofile.rlim_cur;
}
if (max_fds > INT_MAX)
max_fds = INT_MAX;
return static_cast<size_t>(max_fds);
}
void IncreaseFdLimitTo(unsigned int max_descriptors) {
// Unimplemented.
}
size_t GetPageSize() {
return getpagesize();
}
// Bytes committed by the system.
size_t GetSystemCommitCharge() {
NOTIMPLEMENTED();
return 0;
}
bool GetSystemMemoryInfo(SystemMemoryInfoKB* meminfo) {
struct host_basic_info hostinfo;
mach_msg_type_number_t count = HOST_BASIC_INFO_COUNT;
base::mac::ScopedMachSendRight host(mach_host_self());
int result = host_info(host.get(), HOST_BASIC_INFO,
reinterpret_cast<host_info_t>(&hostinfo), &count);
if (result != KERN_SUCCESS)
return false;
DCHECK_EQ(HOST_BASIC_INFO_COUNT, count);
meminfo->total = static_cast<int>(hostinfo.max_mem / 1024);
vm_statistics64_data_t vm_info;
count = HOST_VM_INFO64_COUNT;
if (host_statistics64(host.get(), HOST_VM_INFO64,
reinterpret_cast<host_info64_t>(&vm_info),
&count) != KERN_SUCCESS) {
return false;
}
DCHECK_EQ(HOST_VM_INFO64_COUNT, count);
// Check that PAGE_SIZE is divisible by 1024 (2^10).
CHECK_EQ(PAGE_SIZE, (PAGE_SIZE >> 10) << 10);
meminfo->free = saturated_cast<int>(
PAGE_SIZE / 1024 * (vm_info.free_count - vm_info.speculative_count));
meminfo->speculative =
saturated_cast<int>(PAGE_SIZE / 1024 * vm_info.speculative_count);
meminfo->file_backed =
saturated_cast<int>(PAGE_SIZE / 1024 * vm_info.external_page_count);
meminfo->purgeable =
saturated_cast<int>(PAGE_SIZE / 1024 * vm_info.purgeable_count);
return true;
}
size_t ProcessMetrics::GetMallocUsage() {
malloc_statistics_t stats;
malloc_zone_statistics(nullptr, &stats);
return stats.size_in_use;
}
} // namespace base
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