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runtime/pprof: emit end-of-log marker at end of CPU profile.

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R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/6489065
This commit is contained in:
Alan Donovan 2012-09-04 14:34:03 -04:00
parent d353d43d36
commit b2458ff75c
2 changed files with 25 additions and 5 deletions
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16
src/pkg/runtime/pprof/pprof_test.go
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@ -49,19 +49,25 @@ func TestCPUProfile(t *testing.T) {
// Convert []byte to []uintptr.
bytes := prof.Bytes()
l := len(bytes) / int(unsafe.Sizeof(uintptr(0)))
val := *(*[]uintptr)(unsafe.Pointer(&bytes))
val = val[:len(bytes)/int(unsafe.Sizeof(uintptr(0)))]
val = val[:l]
if len(val) < 10 {
if l < 13 {
t.Fatalf("profile too short: %#x", val)
}
if val[0] != 0 || val[1] != 3 || val[2] != 0 || val[3] != 1e6/100 || val[4] != 0 {
t.Fatalf("unexpected header %#x", val[:5])
hd, val, tl := val[:5], val[5:l-3], val[l-3:]
if hd[0] != 0 || hd[1] != 3 || hd[2] != 0 || hd[3] != 1e6/100 || hd[4] != 0 {
t.Fatalf("unexpected header %#x", hd)
}
if tl[0] != 0 || tl[1] != 1 || tl[2] != 0 {
t.Fatalf("malformed end-of-data marker %#x", tl)
}
// Check that profile is well formed and contains ChecksumIEEE.
found := false
val = val[5:]
for len(val) > 0 {
if len(val) < 2 || val[0] < 1 || val[1] < 1 || uintptr(len(val)) < 2+val[1] {
t.Fatalf("malformed profile. leftover: %#x", val)