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cmd/trace: gracefully handle empty profiles

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Return a meaningful message when a profile is empty.
Also rename "IO blocking" to "Network blocking",
currently only network blocking is captured.

Fixes #11098

Change-Id: Ib6f1292b8ade4805756fcb6696ba1fca8f9f39a9
Reviewed-on: https://go-review.googlesource.com/11243
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Dmitry Vyukov 2015-06-18 16:19:18 +02:00
parent e72f5f67a1
commit 1b269463a5
2 changed files with 5 additions and 1 deletions
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2
src/cmd/trace/main.go
View File

@ -124,7 +124,7 @@ var templMain = []byte(`
<body>
<a href="/trace">View trace</a><br>
<a href="/goroutines">Goroutine analysis</a><br>
<a href="/io">IO blocking profile</a><br>
<a href="/io">Network blocking profile</a><br>
<a href="/block">Synchronization blocking profile</a><br>
<a href="/syscall">Syscall blocking profile</a><br>
<a href="/sched">Scheduler latency profile</a><br>

4
src/cmd/trace/pprof.go
View File

@ -124,6 +124,10 @@ func httpSched(w http.ResponseWriter, r *http.Request) {
// generateSVGProfile generates pprof-like profile stored in prof and writes in to w.
func serveSVGProfile(w http.ResponseWriter, r *http.Request, prof map[uint64]Record) {
if len(prof) == 0 {
http.Error(w, "The profile is empty", http.StatusNotFound)
return
}
blockf, err := ioutil.TempFile("", "block")
if err != nil {
http.Error(w, fmt.Sprintf("failed to create temp file: %v", err), http.StatusInternalServerError)