diff options
Diffstat (limited to 'libgo/go/runtime/debug.go')
| -rw-r--r-- | libgo/go/runtime/debug.go | 184 |
1 files changed, 32 insertions, 152 deletions
diff --git a/libgo/go/runtime/debug.go b/libgo/go/runtime/debug.go index 0c915a2a76..a8827f20b2 100644 --- a/libgo/go/runtime/debug.go +++ b/libgo/go/runtime/debug.go @@ -4,24 +4,35 @@ package runtime -// Breakpoint executes a breakpoint trap. -func Breakpoint() - -// LockOSThread wires the calling goroutine to its current operating system thread. -// Until the calling goroutine exits or calls UnlockOSThread, it will always -// execute in that thread, and no other goroutine can. -func LockOSThread() - -// UnlockOSThread unwires the calling goroutine from its fixed operating system thread. -// If the calling goroutine has not called LockOSThread, UnlockOSThread is a no-op. -func UnlockOSThread() +import ( + "runtime/internal/atomic" + "unsafe" +) // GOMAXPROCS sets the maximum number of CPUs that can be executing -// simultaneously and returns the previous setting. If n < 1, it does not +// simultaneously and returns the previous setting. If n < 1, it does not // change the current setting. // The number of logical CPUs on the local machine can be queried with NumCPU. // This call will go away when the scheduler improves. -func GOMAXPROCS(n int) int +func GOMAXPROCS(n int) int { + if n > _MaxGomaxprocs { + n = _MaxGomaxprocs + } + lock(&sched.lock) + ret := int(gomaxprocs) + unlock(&sched.lock) + if n <= 0 || n == ret { + return ret + } + + stopTheWorld("GOMAXPROCS") + + // newprocs will be processed by startTheWorld + newprocs = int32(n) + + startTheWorld() + return ret +} // NumCPU returns the number of logical CPUs usable by the current process. // @@ -31,150 +42,19 @@ func GOMAXPROCS(n int) int func NumCPU() int // NumCgoCall returns the number of cgo calls made by the current process. -func NumCgoCall() int64 - -// NumGoroutine returns the number of goroutines that currently exist. -func NumGoroutine() int - -// MemProfileRate controls the fraction of memory allocations -// that are recorded and reported in the memory profile. -// The profiler aims to sample an average of -// one allocation per MemProfileRate bytes allocated. -// -// To include every allocated block in the profile, set MemProfileRate to 1. -// To turn off profiling entirely, set MemProfileRate to 0. -// -// The tools that process the memory profiles assume that the -// profile rate is constant across the lifetime of the program -// and equal to the current value. Programs that change the -// memory profiling rate should do so just once, as early as -// possible in the execution of the program (for example, -// at the beginning of main). -var MemProfileRate int = 512 * 1024 - -// A MemProfileRecord describes the live objects allocated -// by a particular call sequence (stack trace). -type MemProfileRecord struct { - AllocBytes, FreeBytes int64 // number of bytes allocated, freed - AllocObjects, FreeObjects int64 // number of objects allocated, freed - Stack0 [32]uintptr // stack trace for this record; ends at first 0 entry -} - -// InUseBytes returns the number of bytes in use (AllocBytes - FreeBytes). -func (r *MemProfileRecord) InUseBytes() int64 { return r.AllocBytes - r.FreeBytes } - -// InUseObjects returns the number of objects in use (AllocObjects - FreeObjects). -func (r *MemProfileRecord) InUseObjects() int64 { - return r.AllocObjects - r.FreeObjects -} - -// Stack returns the stack trace associated with the record, -// a prefix of r.Stack0. -func (r *MemProfileRecord) Stack() []uintptr { - for i, v := range r.Stack0 { - if v == 0 { - return r.Stack0[0:i] - } +func NumCgoCall() int64 { + var n int64 + for mp := (*m)(atomic.Loadp(unsafe.Pointer(&allm))); mp != nil; mp = mp.alllink { + n += int64(mp.ncgocall) } - return r.Stack0[0:] + return n } -// MemProfile returns n, the number of records in the current memory profile. -// If len(p) >= n, MemProfile copies the profile into p and returns n, true. -// If len(p) < n, MemProfile does not change p and returns n, false. -// -// If inuseZero is true, the profile includes allocation records -// where r.AllocBytes > 0 but r.AllocBytes == r.FreeBytes. -// These are sites where memory was allocated, but it has all -// been released back to the runtime. -// -// Most clients should use the runtime/pprof package or -// the testing package's -test.memprofile flag instead -// of calling MemProfile directly. -func MemProfile(p []MemProfileRecord, inuseZero bool) (n int, ok bool) - -// 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 *StackRecord) Stack() []uintptr { - for i, v := range r.Stack0 { - if v == 0 { - return r.Stack0[0:i] - } - } - return r.Stack0[0:] -} - -// 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 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 -// 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) - -// SetBlockProfileRate controls the fraction of goroutine blocking events -// that are reported in the blocking profile. The profiler aims to sample -// an average of one blocking event per rate nanoseconds spent blocked. -// -// To include every blocking event in the profile, pass rate = 1. -// To turn off profiling entirely, pass rate <= 0. -func SetBlockProfileRate(rate int) - -// BlockProfileRecord describes blocking events originated -// at a particular call sequence (stack trace). -type BlockProfileRecord struct { - Count int64 - Cycles int64 - StackRecord +// NumGoroutine returns the number of goroutines that currently exist. +func NumGoroutine() int { + return int(gcount()) } -// BlockProfile returns n, the number of records in the current blocking profile. -// If len(p) >= n, BlockProfile copies the profile into p and returns n, true. -// If len(p) < n, BlockProfile does not change p and returns n, false. -// -// Most clients should use the runtime/pprof package or -// the testing package's -test.blockprofile flag instead -// of calling BlockProfile directly. -func BlockProfile(p []BlockProfileRecord) (n int, ok bool) - -// 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 - // Get field tracking information. Only fields with a tag go:"track" // are tracked. This function will add every such field that is // referenced to the map. The keys in the map will be |