mirror of
https://github.com/golang/go
synced 2024-11-24 22:57:57 -07:00
runtime: split extern.go into debug.go, extern.go, sig.go.
move mal next to the other malloc functions. R=r CC=golang-dev https://golang.org/cl/1701045
This commit is contained in:
Russ Cox
parent
44ca04d3d6
commit
e63ae242e6
@ -21,8 +21,10 @@ CFLAGS_windows=-D__WINDOWS__
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CFLAGS=-I$(GOOS) -I$(GOARCH) -I$(GOOS)/$(GOARCH) -wF $(CFLAGS_$(SIZE)) $(CFLAGS_$(GOARCH)) $(CFLAGS_$(GOOS))
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GOFILES=\
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debug.go\
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error.go\
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extern.go\
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sig.go\
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type.go\
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version.go\
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142
src/pkg/runtime/debug.go
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142
src/pkg/runtime/debug.go
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@ -0,0 +1,142 @@
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package runtime
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// Breakpoint() executes a breakpoint trap.
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func Breakpoint()
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// LockOSThread wires the calling goroutine to its current operating system thread.
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// Until the calling goroutine exits or calls UnlockOSThread, it will always
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// execute in that thread, and no other goroutine can.
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// LockOSThread cannot be used during init functions.
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func LockOSThread()
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// UnlockOSThread unwires the calling goroutine from its fixed operating system thread.
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// If the calling goroutine has not called LockOSThread, UnlockOSThread is a no-op.
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func UnlockOSThread()
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// GOMAXPROCS sets the maximum number of CPUs that can be executing
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// simultaneously and returns the previous setting. If n < 1, it does not
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// change the current setting.
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// This call will go away when the scheduler improves.
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func GOMAXPROCS(n int) int
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// Cgocalls returns the number of cgo calls made by the current process.
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func Cgocalls() int64
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type MemStatsType struct {
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// General statistics.
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// Not locked during update; approximate.
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Alloc uint64 // bytes allocated and still in use
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TotalAlloc uint64 // bytes allocated (even if freed)
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Sys uint64 // bytes obtained from system (should be sum of XxxSys below)
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Lookups uint64 // number of pointer lookups
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Mallocs uint64 // number of mallocs
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// Main allocation heap statistics.
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HeapAlloc uint64 // bytes allocated and still in use
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HeapSys uint64 // bytes obtained from system
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HeapIdle uint64 // bytes in idle spans
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HeapInuse uint64 // bytes in non-idle span
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// Low-level fixed-size structure allocator statistics.
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// Inuse is bytes used now.
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// Sys is bytes obtained from system.
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StackInuse uint64 // bootstrap stacks
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StackSys uint64
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MSpanInuse uint64 // mspan structures
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MSpanSys uint64
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MCacheInuse uint64 // mcache structures
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MCacheSys uint64
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MHeapMapSys uint64 // heap map
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BuckHashSys uint64 // profiling bucket hash table
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// Garbage collector statistics.
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NextGC uint64
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PauseNs uint64
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NumGC uint32
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EnableGC bool
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DebugGC bool
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// Per-size allocation statistics.
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// Not locked during update; approximate.
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BySize [67]struct {
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Size uint32
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Mallocs uint64
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Frees uint64
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}
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}
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// MemStats holds statistics about the memory system.
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// The statistics are only approximate, as they are not interlocked on update.
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var MemStats MemStatsType
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// Alloc allocates a block of the given size.
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// FOR TESTING AND DEBUGGING ONLY.
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func Alloc(uintptr) *byte
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// Free frees the block starting at the given pointer.
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// FOR TESTING AND DEBUGGING ONLY.
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func Free(*byte)
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// Lookup returns the base and size of the block containing the given pointer.
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// FOR TESTING AND DEBUGGING ONLY.
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func Lookup(*byte) (*byte, uintptr)
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// GC runs a garbage collection.
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func GC()
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// MemProfileRate controls the fraction of memory allocations
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// that are recorded and reported in the memory profile.
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// The profiler aims to sample an average of
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// one allocation per MemProfileRate bytes allocated.
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//
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// To include every allocated block in the profile, set MemProfileRate to 1.
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// To turn off profiling entirely, set MemProfileRate to 0.
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//
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// The tools that process the memory profiles assume that the
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// profile rate is constant across the lifetime of the program
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// and equal to the current value. Programs that change the
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// memory profiling rate should do so just once, as early as
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// possible in the execution of the program (for example,
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// at the beginning of main).
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var MemProfileRate int = 512 * 1024
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// A MemProfileRecord describes the live objects allocated
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// by a particular call sequence (stack trace).
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type MemProfileRecord struct {
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AllocBytes, FreeBytes int64 // number of bytes allocated, freed
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AllocObjects, FreeObjects int64 // number of objects allocated, freed
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Stack0 [32]uintptr // stack trace for this record; ends at first 0 entry
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}
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// InUseBytes returns the number of bytes in use (AllocBytes - FreeBytes).
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func (r *MemProfileRecord) InUseBytes() int64 { return r.AllocBytes - r.FreeBytes }
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// InUseObjects returns the number of objects in use (AllocObjects - FreeObjects).
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func (r *MemProfileRecord) InUseObjects() int64 {
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return r.AllocObjects - r.FreeObjects
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}
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// Stack returns the stack trace associated with the record,
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// a prefix of r.Stack0.
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func (r *MemProfileRecord) Stack() []uintptr {
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for i, v := range r.Stack0 {
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if v == 0 {
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return r.Stack0[0:i]
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}
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}
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return r.Stack0[0:]
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}
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// MemProfile returns n, the number of records in the current memory profile.
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// If len(p) >= n, MemProfile copies the profile into p and returns n, true.
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// If len(p) < n, MemProfile does not change p and returns n, false.
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//
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// If inuseZero is true, the profile includes allocation records
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// where r.AllocBytes > 0 but r.AllocBytes == r.FreeBytes.
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// These are sites where memory was allocated, but it has all
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// been released back to the runtime.
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func MemProfile(p []MemProfileRecord, inuseZero bool) (n int, ok bool)
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@ -18,9 +18,6 @@ func Gosched()
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// Goexit runs all deferred calls before terminating the goroutine.
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func Goexit()
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// Breakpoint() executes a breakpoint trap.
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func Breakpoint()
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// Caller reports file and line number information about function invocations on
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// the calling goroutine's stack. The argument skip is the number of stack frames to
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// ascend, with 0 identifying the the caller of Caller. The return values report the
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@ -95,25 +92,6 @@ func (f *Func) FileLine(pc uintptr) (file string, line int) {
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// mid returns the current os thread (m) id.
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func mid() uint32
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// LockOSThread wires the calling goroutine to its current operating system thread.
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// Until the calling goroutine exits or calls UnlockOSThread, it will always
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// execute in that thread, and no other goroutine can.
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// LockOSThread cannot be used during init functions.
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func LockOSThread()
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// UnlockOSThread unwires the calling goroutine from its fixed operating system thread.
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// If the calling goroutine has not called LockOSThread, UnlockOSThread is a no-op.
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func UnlockOSThread()
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// GOMAXPROCS sets the maximum number of CPUs that can be executing
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// simultaneously and returns the previous setting. If n < 1, it does not
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// change the current setting.
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// This call will go away when the scheduler improves.
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func GOMAXPROCS(n int) int
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// Cgocalls returns the number of cgo calls made by the current process.
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func Cgocalls() int64
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// Semacquire waits until *s > 0 and then atomically decrements it.
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// It is intended as a simple sleep primitive for use by the synchronization
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// library and should not be used directly.
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@ -125,79 +103,6 @@ func Semacquire(s *uint32)
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// library and should not be used directly.
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func Semrelease(s *uint32)
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// Sigrecv returns a bitmask of signals that have arrived since the last call to Sigrecv.
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// It blocks until at least one signal arrives.
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func Sigrecv() uint32
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// Signame returns a string describing the signal, or "" if the signal is unknown.
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func Signame(sig int32) string
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// Siginit enables receipt of signals via Sigrecv. It should typically
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// be called during initialization.
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func Siginit()
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type MemStatsType struct {
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// General statistics.
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// Not locked during update; approximate.
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Alloc uint64 // bytes allocated and still in use
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TotalAlloc uint64 // bytes allocated (even if freed)
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Sys uint64 // bytes obtained from system (should be sum of XxxSys below)
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Lookups uint64 // number of pointer lookups
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Mallocs uint64 // number of mallocs
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// Main allocation heap statistics.
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HeapAlloc uint64 // bytes allocated and still in use
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HeapSys uint64 // bytes obtained from system
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HeapIdle uint64 // bytes in idle spans
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HeapInuse uint64 // bytes in non-idle span
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// Low-level fixed-size structure allocator statistics.
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// Inuse is bytes used now.
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// Sys is bytes obtained from system.
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StackInuse uint64 // bootstrap stacks
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StackSys uint64
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MSpanInuse uint64 // mspan structures
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MSpanSys uint64
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MCacheInuse uint64 // mcache structures
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MCacheSys uint64
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MHeapMapSys uint64 // heap map
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BuckHashSys uint64 // profiling bucket hash table
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// Garbage collector statistics.
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NextGC uint64
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PauseNs uint64
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NumGC uint32
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EnableGC bool
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DebugGC bool
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// Per-size allocation statistics.
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// Not locked during update; approximate.
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BySize [67]struct {
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Size uint32
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Mallocs uint64
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Frees uint64
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}
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}
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// MemStats holds statistics about the memory system.
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// The statistics are only approximate, as they are not interlocked on update.
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var MemStats MemStatsType
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// Alloc allocates a block of the given size.
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// FOR TESTING AND DEBUGGING ONLY.
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func Alloc(uintptr) *byte
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// Free frees the block starting at the given pointer.
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// FOR TESTING AND DEBUGGING ONLY.
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func Free(*byte)
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// Lookup returns the base and size of the block containing the given pointer.
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// FOR TESTING AND DEBUGGING ONLY.
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func Lookup(*byte) (*byte, uintptr)
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// GC runs a garbage collection.
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func GC()
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// SetFinalizer sets the finalizer associated with x to f.
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// When the garbage collector finds an unreachable block
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// with an associated finalizer, it clears the association and creates
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@ -261,56 +166,3 @@ func GOROOT() string {
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// A trailing + indicates that the tree had local modifications
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// at the time of the build.
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func Version() string { return defaultVersion }
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// MemProfileRate controls the fraction of memory allocations
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// that are recorded and reported in the memory profile.
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// The profiler aims to sample an average of
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// one allocation per MemProfileRate bytes allocated.
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//
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// To include every allocated block in the profile, set MemProfileRate to 1.
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// To turn off profiling entirely, set MemProfileRate to 0.
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//
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// The tools that process the memory profiles assume that the
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// profile rate is constant across the lifetime of the program
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// and equal to the current value. Programs that change the
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// memory profiling rate should do so just once, as early as
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// possible in the execution of the program (for example,
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// at the beginning of main).
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var MemProfileRate int = 512 * 1024
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// A MemProfileRecord describes the live objects allocated
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// by a particular call sequence (stack trace).
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type MemProfileRecord struct {
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AllocBytes, FreeBytes int64 // number of bytes allocated, freed
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AllocObjects, FreeObjects int64 // number of objects allocated, freed
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Stack0 [32]uintptr // stack trace for this record; ends at first 0 entry
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}
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// InUseBytes returns the number of bytes in use (AllocBytes - FreeBytes).
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func (r *MemProfileRecord) InUseBytes() int64 { return r.AllocBytes - r.FreeBytes }
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// InUseObjects returns the number of objects in use (AllocObjects - FreeObjects).
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func (r *MemProfileRecord) InUseObjects() int64 {
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return r.AllocObjects - r.FreeObjects
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}
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// Stack returns the stack trace associated with the record,
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// a prefix of r.Stack0.
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func (r *MemProfileRecord) Stack() []uintptr {
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for i, v := range r.Stack0 {
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if v == 0 {
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return r.Stack0[0:i]
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}
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}
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return r.Stack0[0:]
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}
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// MemProfile returns n, the number of records in the current memory profile.
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// If len(p) >= n, MemProfile copies the profile into p and returns n, true.
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// If len(p) < n, MemProfile does not change p and returns n, false.
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//
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// If inuseZero is true, the profile includes allocation records
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// where r.AllocBytes > 0 but r.AllocBytes == r.FreeBytes.
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// These are sites where memory was allocated, but it has all
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// been released back to the runtime.
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func MemProfile(p []MemProfileRecord, inuseZero bool) (n int, ok bool)
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@ -261,6 +261,10 @@ mal(uintptr n)
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return mallocgc(n, 0, 1, 1);
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}
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func mal(n uint32) (ret *uint8) {
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ret = mal(n);
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}
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// Stack allocator uses malloc/free most of the time,
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// but if we're in the middle of malloc and need stack,
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// we have to do something else to avoid deadlock.
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@ -5,10 +5,6 @@
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package runtime
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#include "runtime.h"
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func mal(n uint32) (ret *uint8) {
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ret = mal(n);
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}
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func GOMAXPROCS(n int32) (ret int32) {
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ret = gomaxprocsfunc(n);
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}
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16
src/pkg/runtime/sig.go
Normal file
16
src/pkg/runtime/sig.go
Normal file
@ -0,0 +1,16 @@
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// Copyright 2009 The Go Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style
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// license that can be found in the LICENSE file.
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package runtime
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// Sigrecv returns a bitmask of signals that have arrived since the last call to Sigrecv.
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// It blocks until at least one signal arrives.
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func Sigrecv() uint32
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// Signame returns a string describing the signal, or "" if the signal is unknown.
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func Signame(sig int32) string
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// Siginit enables receipt of signals via Sigrecv. It should typically
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// be called during initialization.
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func Siginit()
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