code review 132440043: runtime: convert cpuprof from C to Go

src/pkg/runtime/debug.go

 // Copyright 2009 The Go Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
 package runtime
 
 import "unsafe"
 
 // Breakpoint executes a breakpoint trap.
 func Breakpoint()
@@ skipping 31 matching lines @@
         }
         return n
 }
 
 // NumGoroutine returns the number of goroutines that currently exist.
 func NumGoroutine() int {
         return int(gcount())
 }
 
 func gcount() int32
-
-// 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
-// data accumulated while it was on has been returned, CPUProfile returns nil.
-// The caller must save the returned data before calling CPUProfile again.
-//
-// Most clients should use the runtime/pprof package or
-// the testing package's -test.cpuprofile flag instead of calling
-// CPUProfile directly.
-func CPUProfile() []byte
-
-// SetCPUProfileRate sets the CPU profiling rate to hz samples per second.
-// If hz <= 0, SetCPUProfileRate turns off profiling.
-// If the profiler is on, the rate cannot be changed without first turning it off.
-//
-// Most clients should use the runtime/pprof package or
-// the testing package's -test.cpuprofile flag instead of calling
-// SetCPUProfileRate directly.
-func SetCPUProfileRate(hz int)