forked from mirror/client_golang
117 lines
3.4 KiB
Go
117 lines
3.4 KiB
Go
// Copyright 2019 The Prometheus Authors
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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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// http://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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package prometheus
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import (
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"syscall"
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"unsafe"
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"golang.org/x/sys/windows"
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)
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func canCollectProcess() bool {
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return true
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}
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var (
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modpsapi = syscall.NewLazyDLL("psapi.dll")
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modkernel32 = syscall.NewLazyDLL("kernel32.dll")
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procGetProcessMemoryInfo = modpsapi.NewProc("GetProcessMemoryInfo")
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procGetProcessHandleCount = modkernel32.NewProc("GetProcessHandleCount")
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)
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type processMemoryCounters struct {
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// System interface description
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// https://docs.microsoft.com/en-us/windows/desktop/api/psapi/ns-psapi-process_memory_counters_ex
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// Refer to the Golang internal implementation
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// https://golang.org/src/internal/syscall/windows/psapi_windows.go
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_ uint32
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PageFaultCount uint32
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PeakWorkingSetSize uintptr
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WorkingSetSize uintptr
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QuotaPeakPagedPoolUsage uintptr
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QuotaPagedPoolUsage uintptr
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QuotaPeakNonPagedPoolUsage uintptr
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QuotaNonPagedPoolUsage uintptr
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PagefileUsage uintptr
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PeakPagefileUsage uintptr
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PrivateUsage uintptr
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}
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func getProcessMemoryInfo(handle windows.Handle) (processMemoryCounters, error) {
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mem := processMemoryCounters{}
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r1, _, err := procGetProcessMemoryInfo.Call(
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uintptr(handle),
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uintptr(unsafe.Pointer(&mem)),
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uintptr(unsafe.Sizeof(mem)),
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)
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if r1 != 1 {
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return mem, err
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} else {
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return mem, nil
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}
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}
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func getProcessHandleCount(handle windows.Handle) (uint32, error) {
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var count uint32
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r1, _, err := procGetProcessHandleCount.Call(
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uintptr(handle),
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uintptr(unsafe.Pointer(&count)),
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)
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if r1 != 1 {
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return 0, err
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} else {
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return count, nil
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}
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}
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func (c *processCollector) processCollect(ch chan<- Metric) {
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h, err := windows.GetCurrentProcess()
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if err != nil {
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c.reportError(ch, nil, err)
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return
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}
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var startTime, exitTime, kernelTime, userTime windows.Filetime
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err = windows.GetProcessTimes(h, &startTime, &exitTime, &kernelTime, &userTime)
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if err != nil {
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c.reportError(ch, nil, err)
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return
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}
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ch <- MustNewConstMetric(c.startTime, GaugeValue, float64(startTime.Nanoseconds()/1e9))
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ch <- MustNewConstMetric(c.cpuTotal, CounterValue, fileTimeToSeconds(kernelTime)+fileTimeToSeconds(userTime))
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mem, err := getProcessMemoryInfo(h)
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if err != nil {
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c.reportError(ch, nil, err)
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return
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}
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ch <- MustNewConstMetric(c.vsize, GaugeValue, float64(mem.PrivateUsage))
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ch <- MustNewConstMetric(c.rss, GaugeValue, float64(mem.WorkingSetSize))
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handles, err := getProcessHandleCount(h)
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if err != nil {
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c.reportError(ch, nil, err)
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return
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}
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ch <- MustNewConstMetric(c.openFDs, GaugeValue, float64(handles))
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ch <- MustNewConstMetric(c.maxFDs, GaugeValue, float64(16*1024*1024)) // Windows has a hard-coded max limit, not per-process.
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}
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func fileTimeToSeconds(ft windows.Filetime) float64 {
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return float64(uint64(ft.HighDateTime)<<32+uint64(ft.LowDateTime)) / 1e7
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}
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