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runtime: goroutine profile, stack dumps

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R=golang-dev, r, r
CC=golang-dev
https://golang.org/cl/5687076
This commit is contained in:
Russ Cox 2012-02-22 21:45:01 -05:00
parent 133c6bf77f
commit e4b02bfdc0
7 changed files with 207 additions and 59 deletions
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33
src/pkg/runtime/debug.go
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@ -30,7 +30,7 @@ func NumCPU() int
func NumCgoCall() int64
// NumGoroutine returns the number of goroutines that currently exist.
func NumGoroutine() int32
func NumGoroutine() int
// MemProfileRate controls the fraction of memory allocations
// that are recorded and reported in the memory profile.
@ -89,15 +89,14 @@ func (r *MemProfileRecord) Stack() []uintptr {
// of calling MemProfile directly.
func MemProfile(p []MemProfileRecord, inuseZero bool) (n int, ok bool)
// A ThreadProfileRecord describes the execution stack that
// caused a new thread to be created.
type ThreadProfileRecord struct {
// A StackRecord describes a single execution stack.
type StackRecord struct {
Stack0 [32]uintptr // stack trace for this record; ends at first 0 entry
}
// Stack returns the stack trace associated with the record,
// a prefix of r.Stack0.
func (r *ThreadProfileRecord) Stack() []uintptr {
func (r *StackRecord) Stack() []uintptr {
for i, v := range r.Stack0 {
if v == 0 {
return r.Stack0[0:i]
@ -106,13 +105,21 @@ func (r *ThreadProfileRecord) Stack() []uintptr {
return r.Stack0[0:]
}
// ThreadProfile returns n, the number of records in the current thread profile.
// If len(p) >= n, ThreadProfile copies the profile into p and returns n, true.
// If len(p) < n, ThreadProfile does not change p and returns n, false.
// ThreadCreateProfile returns n, the number of records in the thread creation profile.
// If len(p) >= n, ThreadCreateProfile copies the profile into p and returns n, true.
// If len(p) < n, ThreadCreateProfile does not change p and returns n, false.
//
// Most clients should use the runtime/pprof package instead
// of calling ThreadProfile directly.
func ThreadProfile(p []ThreadProfileRecord) (n int, ok bool)
// of calling ThreadCreateProfile directly.
func ThreadCreateProfile(p []StackRecord) (n int, ok bool)
// GoroutineProfile returns n, the number of records in the active goroutine stack profile.
// If len(p) >= n, GoroutineProfile copies the profile into p and returns n, true.
// If len(p) < n, GoroutineProfile does not change p and returns n, false.
//
// Most clients should use the runtime/pprof package instead
// of calling GoroutineProfile directly.
func GoroutineProfile(p []StackRecord) (n int, ok bool)
// CPUProfile returns the next chunk of binary CPU profiling stack trace data,
// blocking until data is available. If profiling is turned off and all the profile
@ -130,3 +137,9 @@ func CPUProfile() []byte
// the testing package's -test.cpuprofile flag instead of calling
// SetCPUProfileRate directly.
func SetCPUProfileRate(hz int)
// Stack formats a stack trace of the calling goroutine into buf
// and returns the number of bytes written to buf.
// If all is true, Stack formats stack traces of all other goroutines
// into buf after the trace for the current goroutine.
func Stack(buf []byte, all bool) int