| // Copyright 2016 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.h" |
| |
| #include <mach/mach.h> |
| #include <stddef.h> |
| #include <sys/sysctl.h> |
| #include <sys/time.h> |
| #include <unistd.h> |
| |
| #include <memory> |
| |
| #include "base/feature_list.h" |
| #include "base/mac/mach_logging.h" |
| #include "base/memory/free_deleter.h" |
| #include "base/stl_util.h" |
| |
| namespace base { |
| |
| // Enables backgrounding hidden renderers on Mac. |
| const Feature kMacAllowBackgroundingProcesses{"MacAllowBackgroundingProcesses", |
| FEATURE_DISABLED_BY_DEFAULT}; |
| |
| Time Process::CreationTime() const { |
| int mib[] = {CTL_KERN, KERN_PROC, KERN_PROC_PID, Pid()}; |
| size_t len = 0; |
| if (sysctl(mib, size(mib), NULL, &len, NULL, 0) < 0) |
| return Time(); |
| |
| std::unique_ptr<struct kinfo_proc, base::FreeDeleter> proc( |
| static_cast<struct kinfo_proc*>(malloc(len))); |
| if (sysctl(mib, size(mib), proc.get(), &len, NULL, 0) < 0) |
| return Time(); |
| return Time::FromTimeVal(proc->kp_proc.p_un.__p_starttime); |
| } |
| |
| bool Process::CanBackgroundProcesses() { |
| return FeatureList::IsEnabled(kMacAllowBackgroundingProcesses); |
| } |
| |
| bool Process::IsProcessBackgrounded(PortProvider* port_provider) const { |
| DCHECK(IsValid()); |
| if (port_provider == nullptr || !CanBackgroundProcesses()) |
| return false; |
| |
| mach_port_t task_port = port_provider->TaskForPid(Pid()); |
| if (task_port == TASK_NULL) |
| return false; |
| |
| task_category_policy_data_t category_policy; |
| mach_msg_type_number_t task_info_count = TASK_CATEGORY_POLICY_COUNT; |
| boolean_t get_default = FALSE; |
| |
| kern_return_t result = |
| task_policy_get(task_port, TASK_CATEGORY_POLICY, |
| reinterpret_cast<task_policy_t>(&category_policy), |
| &task_info_count, &get_default); |
| MACH_LOG_IF(ERROR, result != KERN_SUCCESS, result) |
| << "task_policy_get TASK_CATEGORY_POLICY"; |
| |
| if (result == KERN_SUCCESS && get_default == FALSE) { |
| return category_policy.role == TASK_BACKGROUND_APPLICATION; |
| } |
| return false; |
| } |
| |
| bool Process::SetProcessBackgrounded(PortProvider* port_provider, |
| bool background) { |
| DCHECK(IsValid()); |
| if (port_provider == nullptr || !CanBackgroundProcesses()) |
| return false; |
| |
| mach_port_t task_port = port_provider->TaskForPid(Pid()); |
| if (task_port == TASK_NULL) |
| return false; |
| |
| if (IsProcessBackgrounded(port_provider) == background) |
| return true; |
| |
| task_category_policy category_policy; |
| category_policy.role = |
| background ? TASK_BACKGROUND_APPLICATION : TASK_FOREGROUND_APPLICATION; |
| kern_return_t result = |
| task_policy_set(task_port, TASK_CATEGORY_POLICY, |
| reinterpret_cast<task_policy_t>(&category_policy), |
| TASK_CATEGORY_POLICY_COUNT); |
| |
| if (result != KERN_SUCCESS) { |
| MACH_LOG(ERROR, result) << "task_policy_set TASK_CATEGORY_POLICY"; |
| return false; |
| } |
| |
| return true; |
| } |
| |
| } // namespace base |