runtime/trace: add new package

Move tracing functions from runtime/pprof to the new runtime/trace package.

Fixes #9710

Change-Id: I718bcb2ae3e5959d9f72cab5e6708289e5c8ebd5
Reviewed-on: https://go-review.googlesource.com/12511
Reviewed-by: Russ Cox <rsc@golang.org>

1 files changed, 0 insertions, 27 deletions

diff --git a/src/runtime/pprof/pprof.go b/src/runtime/pprof/pprof.go
index 43fe6e85a1..7d888e4ab0 100644
--- a/src/runtime/pprof/pprof.go
+++ b/src/runtime/pprof/pprof.go
@@ -613,33 +613,6 @@ func StopCPUProfile() {
 	<-cpu.done
 }
 
-// TODO(rsc): Decide if StartTrace belongs in this package.
-// See golang.org/issue/9710.
-// StartTrace enables tracing for the current process.
-// While tracing, the trace will be buffered and written to w.
-// StartTrace returns an error if profiling is tracing enabled.
-func StartTrace(w io.Writer) error {
-	if err := runtime.StartTrace(); err != nil {
-		return err
-	}
-	go func() {
-		for {
-			data := runtime.ReadTrace()
-			if data == nil {
-				break
-			}
-			w.Write(data)
-		}
-	}()
-	return nil
-}
-
-// StopTrace stops the current tracing, if any.
-// StopTrace only returns after all the writes for the trace have completed.
-func StopTrace() {
-	runtime.StopTrace()
-}
-
 type byCycles []runtime.BlockProfileRecord
 
 func (x byCycles) Len() int           { return len(x) }