diff options
Diffstat (limited to 'libgo/go/runtime/pprof/label.go')
| -rw-r--r-- | libgo/go/runtime/pprof/label.go | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/libgo/go/runtime/pprof/label.go b/libgo/go/runtime/pprof/label.go index 2d92ef7..b614f12 100644 --- a/libgo/go/runtime/pprof/label.go +++ b/libgo/go/runtime/pprof/label.go @@ -6,6 +6,9 @@ package pprof import ( "context" + "fmt" + "sort" + "strings" ) type label struct { @@ -34,6 +37,23 @@ func labelValue(ctx context.Context) labelMap { // that admits incremental immutable modification more efficiently. type labelMap map[string]string +// String statisfies Stringer and returns key, value pairs in a consistent +// order. +func (l *labelMap) String() string { + if l == nil { + return "" + } + keyVals := make([]string, 0, len(*l)) + + for k, v := range *l { + keyVals = append(keyVals, fmt.Sprintf("%q:%q", k, v)) + } + + sort.Strings(keyVals) + + return "{" + strings.Join(keyVals, ", ") + "}" +} + // WithLabels returns a new context.Context with the given labels added. // A label overwrites a prior label with the same key. func WithLabels(ctx context.Context, labels LabelSet) context.Context { @@ -54,7 +74,8 @@ func WithLabels(ctx context.Context, labels LabelSet) context.Context { // Labels takes an even number of strings representing key-value pairs // and makes a LabelSet containing them. // A label overwrites a prior label with the same key. -// Currently only CPU profile utilizes labels information. +// Currently only the CPU and goroutine profiles utilize any labels +// information. // See https://golang.org/issue/23458 for details. func Labels(args ...string) LabelSet { if len(args)%2 != 0 { |