// procEvent returns a procEntry event from the am_proc_start of am_proc_died event.
// If extra fields are encountered, a warning is returned. If fields are missing, an error is returned.
func procEvent(start int64, v string, t string) (*procEntry, string, error) {
warning := ""
switch t {
case ProcStartEvent:
// Expected format of v is: User,PID,UID,Process Name,Type,Component.
parts := strings.Split(v, ",")
if len(parts) < 6 {
return nil, warning, fmt.Errorf("%s: got %d parts, want 6", ProcStartEvent, len(parts))
}
if len(parts) > 6 {
warning = fmt.Sprintf("%s: got %d parts, expected 6", ProcStartEvent, len(parts))
}
if _, err := strconv.Atoi(parts[1]); err != nil {
return nil, warning, fmt.Errorf("%s: could not parse pid %v: %v", ProcStartEvent, parts[1], err)
}
uid, err := packageutils.AppIDFromString(parts[2])
if err != nil {
return nil, warning, fmt.Errorf("%s: could not parse uid %v: %v", ProcStartEvent, parts[2], err)
}
return &procEntry{
start: start,
pid: parts[1],
uid: fmt.Sprint(uid),
process: parts[3],
component: parts[5],
}, warning, nil
case ProcDiedEvent:
// Expected format of v is: User,PID,Process Name.
parts := strings.Split(v, ",")
if len(parts) < 3 {
return nil, warning, fmt.Errorf("%s: got %d parts, want 3", ProcDiedEvent, len(parts))
}
if len(parts) > 3 {
warning = fmt.Sprintf("%s: got %d parts, expected 3", ProcDiedEvent, len(parts))
}
if _, err := strconv.Atoi(parts[1]); err != nil {
return nil, warning, fmt.Errorf("%s: could not parse pid %v: %v", ProcDiedEvent, parts[1], err)
}
return &procEntry{
start: start,
pid: parts[1],
process: parts[2],
}, warning, nil
default:
return nil, "", fmt.Errorf("unknown transition: %v", t)
}
}
// ExtractPIDMappings returns mappings from PID to app names and UIDs extracted from the bug report.
func ExtractPIDMappings(contents string) (map[string][]AppInfo, []string) {
var warnings []string
mapping := make(map[string][]AppInfo)
for _, line := range strings.Split(contents, "\n") {
if m, result := historianutils.SubexpNames(pidRE, line); m {
baseUID, err := packageutils.AppIDFromString(result["uid"])
uidStr := strconv.Itoa(int(baseUID))
if err != nil {
uidStr = ""
warnings = append(warnings, fmt.Sprintf("invalid uid: %s", result["uid"]))
}
mapping[result["pid"]] = append(mapping[result["pid"]], AppInfo{
Name: result["app"],
UID: uidStr,
})
}
}
return mapping, warnings
}