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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/ProcInfo.h"
#include "mozilla/ScopeExit.h"
#include "mozilla/ipc/GeckoChildProcessHost.h"
#include "nsMemoryReporterManager.h"
#include <cstdio>
#include <cstring>
#include <unistd.h>
#include <libproc.h>
#include <sys/sysctl.h>
#include <mach/mach.h>
#include <mach/mach_time.h>
static void GetTimeBase(mach_timebase_info_data_t* timebase) {
// Expected results are 125/3 on aarch64, and 1/1 on Intel CPUs.
if (mach_timebase_info(timebase) != KERN_SUCCESS) {
timebase->numer = 1;
timebase->denom = 1;
}
}
namespace mozilla {
nsresult GetCpuTimeSinceProcessStartInMs(uint64_t* aResult) {
struct proc_taskinfo pti;
if ((unsigned long)proc_pidinfo(getpid(), PROC_PIDTASKINFO, 0, &pti,
PROC_PIDTASKINFO_SIZE) <
PROC_PIDTASKINFO_SIZE) {
return NS_ERROR_FAILURE;
}
mach_timebase_info_data_t timebase;
GetTimeBase(&timebase);
*aResult = (pti.pti_total_user + pti.pti_total_system) * timebase.numer /
timebase.denom / PR_NSEC_PER_MSEC;
return NS_OK;
}
nsresult GetGpuTimeSinceProcessStartInMs(uint64_t* aResult) {
task_power_info_v2_data_t task_power_info;
mach_msg_type_number_t count = TASK_POWER_INFO_V2_COUNT;
kern_return_t kr = task_info(mach_task_self(), TASK_POWER_INFO_V2,
(task_info_t)&task_power_info, &count);
if (kr != KERN_SUCCESS) {
return NS_ERROR_FAILURE;
}
*aResult = task_power_info.gpu_energy.task_gpu_utilisation / PR_NSEC_PER_MSEC;
return NS_OK;
}
int GetCycleTimeFrequencyMHz() { return 0; }
ProcInfoPromise::ResolveOrRejectValue GetProcInfoSync(
nsTArray<ProcInfoRequest>&& aRequests) {
ProcInfoPromise::ResolveOrRejectValue result;
HashMap<base::ProcessId, ProcInfo> gathered;
if (!gathered.reserve(aRequests.Length())) {
result.SetReject(NS_ERROR_OUT_OF_MEMORY);
return result;
}
mach_timebase_info_data_t timebase;
GetTimeBase(&timebase);
for (const auto& request : aRequests) {
ProcInfo info;
info.pid = request.pid;
info.childId = request.childId;
info.type = request.processType;
info.origin = std::move(request.origin);
info.windows = std::move(request.windowInfo);
info.utilityActors = std::move(request.utilityInfo);
struct proc_taskinfo pti;
if ((unsigned long)proc_pidinfo(request.pid, PROC_PIDTASKINFO, 0, &pti,
PROC_PIDTASKINFO_SIZE) <
PROC_PIDTASKINFO_SIZE) {
// Can't read data for this process.
// Probably either a sandboxing issue or a race condition, e.g.
// the process has been just been killed. Regardless, skip process.
continue;
}
info.cpuTime = (pti.pti_total_user + pti.pti_total_system) *
timebase.numer / timebase.denom;
mach_port_t selectedTask;
// If we did not get a task from a child process, we use mach_task_self()
if (request.childTask == MACH_PORT_NULL) {
selectedTask = mach_task_self();
} else {
selectedTask = request.childTask;
}
// The phys_footprint value (introduced in 10.11) of the TASK_VM_INFO data
// matches the value in the 'Memory' column of the Activity Monitor.
task_vm_info_data_t task_vm_info;
mach_msg_type_number_t count = TASK_VM_INFO_COUNT;
kern_return_t kr = task_info(selectedTask, TASK_VM_INFO,
(task_info_t)&task_vm_info, &count);
info.memory = kr == KERN_SUCCESS ? task_vm_info.phys_footprint : 0;
// Now getting threads info
// task_threads() gives us a snapshot of the process threads
// but those threads can go away. All the code below makes
// the assumption that thread_info() calls may fail, and
// these errors will be ignored.
thread_act_port_array_t threadList;
mach_msg_type_number_t threadCount;
kern_return_t kret = task_threads(selectedTask, &threadList, &threadCount);
if (kret != KERN_SUCCESS) {
// For some reason, we have no data on the threads for this process.
// Most likely reason is that we have just lost a race condition and
// the process is dead.
// Let's stop here and ignore the entire process.
continue;
}
// Deallocate the thread list.
// Note that this deallocation is entirely undocumented, so the following
// code is based on guesswork and random examples found on the web.
auto guardThreadCount = MakeScopeExit([&] {
if (threadList == nullptr) {
return;
}
// Free each thread to avoid leaks.
for (mach_msg_type_number_t i = 0; i < threadCount; i++) {
mach_port_deallocate(mach_task_self(), threadList[i]);
}
vm_deallocate(mach_task_self(), /* address */ (vm_address_t)threadList,
/* size */ sizeof(thread_t) * threadCount);
});
for (mach_msg_type_number_t i = 0; i < threadCount; i++) {
// Basic thread info.
thread_extended_info_data_t threadInfoData;
count = THREAD_EXTENDED_INFO_COUNT;
kret = thread_info(threadList[i], THREAD_EXTENDED_INFO,
(thread_info_t)&threadInfoData, &count);
if (kret != KERN_SUCCESS) {
continue;
}
// Getting the thread id.
thread_identifier_info identifierInfo;
count = THREAD_IDENTIFIER_INFO_COUNT;
kret = thread_info(threadList[i], THREAD_IDENTIFIER_INFO,
(thread_info_t)&identifierInfo, &count);
if (kret != KERN_SUCCESS) {
continue;
}
// The two system calls were successful, let's add that thread
ThreadInfo* thread = info.threads.AppendElement(fallible);
if (!thread) {
result.SetReject(NS_ERROR_OUT_OF_MEMORY);
return result;
}
thread->cpuTime =
threadInfoData.pth_user_time + threadInfoData.pth_system_time;
thread->name.AssignASCII(threadInfoData.pth_name);
thread->tid = identifierInfo.thread_id;
}
if (!gathered.put(request.pid, std::move(info))) {
result.SetReject(NS_ERROR_OUT_OF_MEMORY);
return result;
}
}
result.SetResolve(std::move(gathered));
return result;
}
} // namespace mozilla
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