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9ff2f0d631
* Swtich from task_info to libproc for system resource info * Fix return value * Convert nanos to seconds * Make GetTimebase static. Expose NanosToMachTime. * Abstract return or GetTaskInfo to new type.
69 lines
2.0 KiB
Plaintext
69 lines
2.0 KiB
Plaintext
/// Copyright 2022 Google LLC
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///
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/// Licensed under the Apache License, Version 2.0 (the "License");
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/// you may not use this file except in compliance with the License.
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/// You may obtain a copy of the License at
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///
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/// https://www.apache.org/licenses/LICENSE-2.0
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///
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/// Unless required by applicable law or agreed to in writing, software
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/// distributed under the License is distributed on an "AS IS" BASIS,
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/// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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/// See the License for the specific language governing permissions and
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/// limitations under the License.
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#include "Source/common/SystemResources.h"
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#include <dispatch/dispatch.h>
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#include <libproc.h>
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#include <mach/kern_return.h>
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#include <unistd.h>
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#include <optional>
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#include "Source/common/SNTLogging.h"
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static mach_timebase_info_data_t GetTimebase() {
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static dispatch_once_t once_token;
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static mach_timebase_info_data_t timebase;
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dispatch_once(&once_token, ^{
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if (mach_timebase_info(&timebase) != KERN_SUCCESS) {
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// This shouldn't fail. Assume transitory and exit the program.
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// Hopefully fixes itself on restart...
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LOGE(@"Failed to get timebase info. Exiting.");
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exit(EXIT_FAILURE);
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}
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});
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return timebase;
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}
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uint64_t MachTimeToNanos(uint64_t mach_time) {
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mach_timebase_info_data_t timebase = GetTimebase();
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return mach_time * timebase.numer / timebase.denom;
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}
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uint64_t NanosToMachTime(uint64_t nanos) {
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mach_timebase_info_data_t timebase = GetTimebase();
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return nanos * timebase.denom / timebase.numer;
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}
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std::optional<SantaTaskInfo> GetTaskInfo() {
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struct proc_taskinfo pti;
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if (proc_pidinfo(getpid(), PROC_PIDTASKINFO, 0, &pti, PROC_PIDTASKINFO_SIZE) <
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PROC_PIDTASKINFO_SIZE) {
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LOGW(@"Unable to get system resource information");
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return std::nullopt;
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}
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return SantaTaskInfo{
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.virtual_size = pti.pti_virtual_size,
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.resident_size = pti.pti_resident_size,
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.total_user_nanos = MachTimeToNanos(pti.pti_total_user),
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.total_system_nanos = MachTimeToNanos(pti.pti_total_system),
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};
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}
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