04157e186f
To measure the MaxRSS memory correctly, read the proc status file under /proc/<pid>/status and extract the MaxRSS value from it. The implementation is only available for Linux based distributions. Bug: b/169453825 Test: go test Change-Id: I32e3068fee7447f9ef5dfb5a8d8dcb6934e0af23
46 lines
1.2 KiB
Go
46 lines
1.2 KiB
Go
package proc
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import (
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"io/ioutil"
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"path/filepath"
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"strconv"
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"strings"
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"android/soong/finder/fs"
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)
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// NewProcStatus returns an instance of the ProcStatus that contains memory
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// information of the process. The memory information is extracted from the
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// "/proc/<pid>/status" text file. This is only available for Linux
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// distribution that supports /proc.
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func NewProcStatus(pid int, fileSystem fs.FileSystem) (*ProcStatus, error) {
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statusFname := filepath.Join("/proc", strconv.Itoa(pid), "status")
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r, err := fileSystem.Open(statusFname)
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if err != nil {
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return &ProcStatus{}, err
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}
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defer r.Close()
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data, err := ioutil.ReadAll(r)
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if err != nil {
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return &ProcStatus{}, err
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}
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s := &ProcStatus{
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pid: pid,
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}
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for _, l := range strings.Split(string(data), "\n") {
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// If the status file does not contain "key: values", just skip the line
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// as the information we are looking for is not needed.
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if !strings.Contains(l, ":") {
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continue
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}
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// At this point, we're only considering entries that has key, single value pairs.
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kv := strings.SplitN(l, ":", 2)
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fillProcStatus(s, strings.TrimSpace(kv[0]), strings.TrimSpace(kv[1]))
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}
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return s, nil
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}
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