cae59bc29d
Test: m clean; load out/build.trace.gz in chrome://tracing Test: m -j nothing; load again Change-Id: I67d4e006a4bdde593b54c20d6d93a48278fe696d
131 lines
3.1 KiB
Go
131 lines
3.1 KiB
Go
// Copyright 2016 Google Inc. All rights reserved.
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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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// 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 tracer
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import (
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"bufio"
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"os"
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"sort"
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"strconv"
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"strings"
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"time"
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)
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type eventEntry struct {
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Name string
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Begin uint64
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End uint64
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}
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func (t *tracerImpl) importEvents(entries []*eventEntry) {
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sort.Slice(entries, func(i, j int) bool {
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return entries[i].Begin < entries[j].Begin
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})
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cpus := []uint64{}
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for _, entry := range entries {
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tid := -1
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for cpu, endTime := range cpus {
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if endTime <= entry.Begin {
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tid = cpu
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cpus[cpu] = entry.End
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break
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}
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}
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if tid == -1 {
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tid = len(cpus)
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cpus = append(cpus, entry.End)
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}
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t.writeEvent(&viewerEvent{
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Name: entry.Name,
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Phase: "X",
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Time: entry.Begin,
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Dur: entry.End - entry.Begin,
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Pid: 1,
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Tid: uint64(tid),
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})
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}
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}
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// ImportNinjaLog reads a .ninja_log file from ninja and writes the events out
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// to the trace.
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//
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// startOffset is when the ninja process started, and is used to position the
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// relative times from the ninja log into the trace. It's also used to skip
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// reading the ninja log if nothing was run.
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func (t *tracerImpl) ImportNinjaLog(thread Thread, filename string, startOffset time.Time) {
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t.Begin("ninja log import", thread)
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defer t.End(thread)
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if stat, err := os.Stat(filename); err != nil {
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t.log.Println("Missing ninja log:", err)
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return
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} else if stat.ModTime().Before(startOffset) {
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t.log.Verboseln("Ninja log not modified, not importing any entries.")
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return
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}
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f, err := os.Open(filename)
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if err != nil {
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t.log.Println("Error opening ninja log:", err)
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return
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}
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defer f.Close()
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s := bufio.NewScanner(f)
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header := true
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entries := []*eventEntry{}
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prevEnd := 0
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offset := uint64(startOffset.UnixNano()) / 1000
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for s.Scan() {
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if header {
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hdr := s.Text()
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if hdr != "# ninja log v5" {
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t.log.Printf("Unknown ninja log header: %q", hdr)
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return
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}
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header = false
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continue
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}
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fields := strings.Split(s.Text(), "\t")
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begin, err := strconv.Atoi(fields[0])
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if err != nil {
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t.log.Printf("Unable to parse ninja entry %q: %v", s.Text(), err)
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return
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}
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end, err := strconv.Atoi(fields[1])
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if err != nil {
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t.log.Printf("Unable to parse ninja entry %q: %v", s.Text(), err)
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return
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}
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if end < prevEnd {
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entries = nil
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}
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prevEnd = end
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entries = append(entries, &eventEntry{
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Name: fields[3],
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Begin: offset + uint64(begin)*1000,
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End: offset + uint64(end)*1000,
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})
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}
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if err := s.Err(); err != nil {
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t.log.Println("Unable to parse ninja log:", err)
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return
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}
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t.importEvents(entries)
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}
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