/
parser.go
72 lines (61 loc) · 2.46 KB
/
parser.go
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package pprof
import (
"fmt"
"io"
"github.com/grafana/jfr-parser/parser"
)
func ParseJFR(body []byte, pi *ParseInput, jfrLabels *LabelsSnapshot) (res *Profiles, err error) {
defer func() {
if r := recover(); r != nil {
err = fmt.Errorf("jfr parser panic: %v", r)
}
}()
p := parser.NewParser(body, parser.Options{
SymbolProcessor: parser.ProcessSymbols,
})
return parse(p, pi, jfrLabels)
}
func parse(parser *parser.Parser, piOriginal *ParseInput, jfrLabels *LabelsSnapshot) (result *Profiles, err error) {
var event string
builders := newJfrPprofBuilders(parser, jfrLabels, piOriginal)
var values = [2]int64{1, 0}
for {
typ, err := parser.ParseEvent()
if err != nil {
if err == io.EOF {
break
}
return nil, fmt.Errorf("jfr parser ParseEvent error: %w", err)
}
switch typ {
case parser.TypeMap.T_EXECUTION_SAMPLE:
ts := parser.GetThreadState(parser.ExecutionSample.State)
if ts != nil && ts.Name != "STATE_SLEEPING" {
builders.addStacktrace(sampleTypeCPU, parser.ExecutionSample.ContextId, parser.ExecutionSample.StackTrace, values[:1])
}
if event == "wall" {
builders.addStacktrace(sampleTypeWall, parser.ExecutionSample.ContextId, parser.ExecutionSample.StackTrace, values[:1])
}
case parser.TypeMap.T_ALLOC_IN_NEW_TLAB:
values[1] = int64(parser.ObjectAllocationInNewTLAB.TlabSize)
builders.addStacktrace(sampleTypeInTLAB, parser.ObjectAllocationInNewTLAB.ContextId, parser.ObjectAllocationInNewTLAB.StackTrace, values[:2])
case parser.TypeMap.T_ALLOC_OUTSIDE_TLAB:
values[1] = int64(parser.ObjectAllocationOutsideTLAB.AllocationSize)
builders.addStacktrace(sampleTypeOutTLAB, parser.ObjectAllocationOutsideTLAB.ContextId, parser.ObjectAllocationOutsideTLAB.StackTrace, values[:2])
case parser.TypeMap.T_MONITOR_ENTER:
values[1] = int64(parser.JavaMonitorEnter.Duration)
builders.addStacktrace(sampleTypeLock, parser.JavaMonitorEnter.ContextId, parser.JavaMonitorEnter.StackTrace, values[:2])
case parser.TypeMap.T_THREAD_PARK:
values[1] = int64(parser.ThreadPark.Duration)
builders.addStacktrace(sampleTypeThreadPark, parser.ThreadPark.ContextId, parser.ThreadPark.StackTrace, values[:2])
case parser.TypeMap.T_LIVE_OBJECT:
builders.addStacktrace(sampleTypeLiveObject, 0, parser.LiveObject.StackTrace, values[:1])
case parser.TypeMap.T_ACTIVE_SETTING:
if parser.ActiveSetting.Name == "event" {
event = parser.ActiveSetting.Value
}
}
}
result = builders.build(event)
return result, nil
}