khenaidoo | ab1f7bd | 2019-11-14 14:00:27 -0500 | [diff] [blame^] | 1 | // Copyright 2019 The Prometheus Authors |
| 2 | // Licensed under the Apache License, Version 2.0 (the "License"); |
| 3 | // you may not use this file except in compliance with the License. |
| 4 | // You may obtain a copy of the License at |
| 5 | // |
| 6 | // http://www.apache.org/licenses/LICENSE-2.0 |
| 7 | // |
| 8 | // Unless required by applicable law or agreed to in writing, software |
| 9 | // distributed under the License is distributed on an "AS IS" BASIS, |
| 10 | // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| 11 | // See the License for the specific language governing permissions and |
| 12 | // limitations under the License. |
| 13 | |
| 14 | package prometheus |
| 15 | |
| 16 | import ( |
| 17 | "syscall" |
| 18 | "unsafe" |
| 19 | |
| 20 | "golang.org/x/sys/windows" |
| 21 | ) |
| 22 | |
| 23 | func canCollectProcess() bool { |
| 24 | return true |
| 25 | } |
| 26 | |
| 27 | var ( |
| 28 | modpsapi = syscall.NewLazyDLL("psapi.dll") |
| 29 | modkernel32 = syscall.NewLazyDLL("kernel32.dll") |
| 30 | |
| 31 | procGetProcessMemoryInfo = modpsapi.NewProc("GetProcessMemoryInfo") |
| 32 | procGetProcessHandleCount = modkernel32.NewProc("GetProcessHandleCount") |
| 33 | ) |
| 34 | |
| 35 | type processMemoryCounters struct { |
| 36 | // https://docs.microsoft.com/en-us/windows/desktop/api/psapi/ns-psapi-_process_memory_counters_ex |
| 37 | _ uint32 |
| 38 | PageFaultCount uint32 |
| 39 | PeakWorkingSetSize uint64 |
| 40 | WorkingSetSize uint64 |
| 41 | QuotaPeakPagedPoolUsage uint64 |
| 42 | QuotaPagedPoolUsage uint64 |
| 43 | QuotaPeakNonPagedPoolUsage uint64 |
| 44 | QuotaNonPagedPoolUsage uint64 |
| 45 | PagefileUsage uint64 |
| 46 | PeakPagefileUsage uint64 |
| 47 | PrivateUsage uint64 |
| 48 | } |
| 49 | |
| 50 | func getProcessMemoryInfo(handle windows.Handle) (processMemoryCounters, error) { |
| 51 | mem := processMemoryCounters{} |
| 52 | r1, _, err := procGetProcessMemoryInfo.Call( |
| 53 | uintptr(handle), |
| 54 | uintptr(unsafe.Pointer(&mem)), |
| 55 | uintptr(unsafe.Sizeof(mem)), |
| 56 | ) |
| 57 | if r1 != 1 { |
| 58 | return mem, err |
| 59 | } else { |
| 60 | return mem, nil |
| 61 | } |
| 62 | } |
| 63 | |
| 64 | func getProcessHandleCount(handle windows.Handle) (uint32, error) { |
| 65 | var count uint32 |
| 66 | r1, _, err := procGetProcessHandleCount.Call( |
| 67 | uintptr(handle), |
| 68 | uintptr(unsafe.Pointer(&count)), |
| 69 | ) |
| 70 | if r1 != 1 { |
| 71 | return 0, err |
| 72 | } else { |
| 73 | return count, nil |
| 74 | } |
| 75 | } |
| 76 | |
| 77 | func (c *processCollector) processCollect(ch chan<- Metric) { |
| 78 | h, err := windows.GetCurrentProcess() |
| 79 | if err != nil { |
| 80 | c.reportError(ch, nil, err) |
| 81 | return |
| 82 | } |
| 83 | |
| 84 | var startTime, exitTime, kernelTime, userTime windows.Filetime |
| 85 | err = windows.GetProcessTimes(h, &startTime, &exitTime, &kernelTime, &userTime) |
| 86 | if err != nil { |
| 87 | c.reportError(ch, nil, err) |
| 88 | return |
| 89 | } |
| 90 | ch <- MustNewConstMetric(c.startTime, GaugeValue, float64(startTime.Nanoseconds()/1e9)) |
| 91 | ch <- MustNewConstMetric(c.cpuTotal, CounterValue, fileTimeToSeconds(kernelTime)+fileTimeToSeconds(userTime)) |
| 92 | |
| 93 | mem, err := getProcessMemoryInfo(h) |
| 94 | if err != nil { |
| 95 | c.reportError(ch, nil, err) |
| 96 | return |
| 97 | } |
| 98 | ch <- MustNewConstMetric(c.vsize, GaugeValue, float64(mem.PrivateUsage)) |
| 99 | ch <- MustNewConstMetric(c.rss, GaugeValue, float64(mem.WorkingSetSize)) |
| 100 | |
| 101 | handles, err := getProcessHandleCount(h) |
| 102 | if err != nil { |
| 103 | c.reportError(ch, nil, err) |
| 104 | return |
| 105 | } |
| 106 | ch <- MustNewConstMetric(c.openFDs, GaugeValue, float64(handles)) |
| 107 | ch <- MustNewConstMetric(c.maxFDs, GaugeValue, float64(16*1024*1024)) // Windows has a hard-coded max limit, not per-process. |
| 108 | } |
| 109 | |
| 110 | func fileTimeToSeconds(ft windows.Filetime) float64 { |
| 111 | return float64(uint64(ft.HighDateTime)<<32+uint64(ft.LowDateTime)) / 1e7 |
| 112 | } |