runtime: remove __go_alloc and __go_free
Move allocg and handling of allgs slice from C to Go.
Reviewed-on: https://go-review.googlesource.com/34797
From-SVN: r244036
This commit is contained in:
Ian Lance Taylor
parent
c65f76af36
commit
0f2a6e84c6
@ -1,4 +1,4 @@
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eac28020ee4b2532d4cd43f448fe612e84e0a108
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dfe446c5a54ca0febabb81b542cc4e634c6f5c30
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The first line of this file holds the git revision number of the last
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merge done from the gofrontend repository.
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@ -556,7 +556,7 @@ func GoroutineProfile(p []StackRecord) (n int, ok bool) {
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stopTheWorld("profile")
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n = 1
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for _, gp1 := range allgs() {
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for _, gp1 := range allgs {
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if isOK(gp1) {
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n++
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}
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@ -571,7 +571,7 @@ func GoroutineProfile(p []StackRecord) (n int, ok bool) {
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r = r[1:]
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// Save other goroutines.
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for _, gp1 := range allgs() {
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for _, gp1 := range allgs {
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if isOK(gp1) {
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if len(r) == 0 {
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// Should be impossible, but better to return a
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@ -11,15 +11,18 @@ import (
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// Functions temporarily called by C code.
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//go:linkname newextram runtime.newextram
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//go:linkname checkdead runtime.checkdead
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//go:linkname schedtrace runtime.schedtrace
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//go:linkname allgadd runtime.allgadd
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// Functions temporarily in C that have not yet been ported.
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func allocm(*p, bool, *unsafe.Pointer, *uintptr) *m
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func malg(bool, bool, *unsafe.Pointer, *uintptr) *g
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func allgadd(*g)
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// C functions for ucontext management.
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func setGContext()
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func makeGContext(*g, unsafe.Pointer, uintptr)
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func getTraceback(me, gp *g)
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// main_init_done is a signal used by cgocallbackg that initialization
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// has been completed. It is made before _cgo_notify_runtime_init_done,
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@ -27,6 +30,39 @@ func makeGContext(*g, unsafe.Pointer, uintptr)
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// it is closed, meaning cgocallbackg can reliably receive from it.
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var main_init_done chan bool
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var (
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allgs []*g
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allglock mutex
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)
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func allgadd(gp *g) {
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if readgstatus(gp) == _Gidle {
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throw("allgadd: bad status Gidle")
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}
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lock(&allglock)
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allgs = append(allgs, gp)
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allglen = uintptr(len(allgs))
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// Grow GC rescan list if necessary.
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if len(allgs) > cap(work.rescan.list) {
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lock(&work.rescan.lock)
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l := work.rescan.list
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// Let append do the heavy lifting, but keep the
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// length the same.
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work.rescan.list = append(l[:cap(l)], 0)[:len(l)]
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unlock(&work.rescan.lock)
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}
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unlock(&allglock)
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}
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// All reads and writes of g's status go through readgstatus, casgstatus
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// castogscanstatus, casfrom_Gscanstatus.
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//go:nosplit
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func readgstatus(gp *g) uint32 {
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return atomic.Load(&gp.atomicstatus)
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}
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// If asked to move to or from a Gscanstatus this will throw. Use the castogscanstatus
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// and casfrom_Gscanstatus instead.
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// casgstatus will loop if the g->atomicstatus is in a Gscan status until the routine that
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@ -328,3 +364,170 @@ func lockextra(nilokay bool) *m {
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func unlockextra(mp *m) {
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atomic.Storeuintptr(&extram, uintptr(unsafe.Pointer(mp)))
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}
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// Check for deadlock situation.
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// The check is based on number of running M's, if 0 -> deadlock.
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func checkdead() {
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// For -buildmode=c-shared or -buildmode=c-archive it's OK if
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// there are no running goroutines. The calling program is
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// assumed to be running.
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if islibrary || isarchive {
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return
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}
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// If we are dying because of a signal caught on an already idle thread,
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// freezetheworld will cause all running threads to block.
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// And runtime will essentially enter into deadlock state,
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// except that there is a thread that will call exit soon.
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if panicking > 0 {
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return
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}
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// -1 for sysmon
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run := sched.mcount - sched.nmidle - sched.nmidlelocked - 1
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if run > 0 {
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return
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}
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if run < 0 {
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print("runtime: checkdead: nmidle=", sched.nmidle, " nmidlelocked=", sched.nmidlelocked, " mcount=", sched.mcount, "\n")
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throw("checkdead: inconsistent counts")
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}
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grunning := 0
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lock(&allglock)
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for i := 0; i < len(allgs); i++ {
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gp := allgs[i]
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if isSystemGoroutine(gp) {
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continue
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}
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s := readgstatus(gp)
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switch s &^ _Gscan {
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case _Gwaiting:
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grunning++
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case _Grunnable,
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_Grunning,
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_Gsyscall:
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unlock(&allglock)
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print("runtime: checkdead: find g ", gp.goid, " in status ", s, "\n")
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throw("checkdead: runnable g")
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}
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}
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unlock(&allglock)
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if grunning == 0 { // possible if main goroutine calls runtime·Goexit()
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throw("no goroutines (main called runtime.Goexit) - deadlock!")
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}
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// Maybe jump time forward for playground.
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gp := timejump()
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if gp != nil {
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// Temporarily commented out for gccgo.
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// For gccgo this code will never run anyhow.
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// casgstatus(gp, _Gwaiting, _Grunnable)
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// globrunqput(gp)
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// _p_ := pidleget()
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// if _p_ == nil {
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// throw("checkdead: no p for timer")
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// }
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// mp := mget()
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// if mp == nil {
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// // There should always be a free M since
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// // nothing is running.
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// throw("checkdead: no m for timer")
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// }
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// nmp.nextp.set(_p_)
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// notewakeup(&mp.park)
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// return
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}
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getg().m.throwing = -1 // do not dump full stacks
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throw("all goroutines are asleep - deadlock!")
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}
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var starttime int64
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func schedtrace(detailed bool) {
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now := nanotime()
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if starttime == 0 {
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starttime = now
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}
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gomaxprocs := int32(GOMAXPROCS(0))
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lock(&sched.lock)
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print("SCHED ", (now-starttime)/1e6, "ms: gomaxprocs=", gomaxprocs, " idleprocs=", sched.npidle, " threads=", sched.mcount, " spinningthreads=", sched.nmspinning, " idlethreads=", sched.nmidle, " runqueue=", sched.runqsize)
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if detailed {
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print(" gcwaiting=", sched.gcwaiting, " nmidlelocked=", sched.nmidlelocked, " stopwait=", sched.stopwait, " sysmonwait=", sched.sysmonwait, "\n")
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}
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// We must be careful while reading data from P's, M's and G's.
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// Even if we hold schedlock, most data can be changed concurrently.
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// E.g. (p->m ? p->m->id : -1) can crash if p->m changes from non-nil to nil.
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for i := int32(0); i < gomaxprocs; i++ {
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_p_ := allp[i]
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if _p_ == nil {
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continue
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}
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mp := _p_.m.ptr()
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h := atomic.Load(&_p_.runqhead)
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t := atomic.Load(&_p_.runqtail)
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if detailed {
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id := int32(-1)
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if mp != nil {
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id = mp.id
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}
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print(" P", i, ": status=", _p_.status, " schedtick=", _p_.schedtick, " syscalltick=", _p_.syscalltick, " m=", id, " runqsize=", t-h, " gfreecnt=", _p_.gfreecnt, "\n")
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} else {
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// In non-detailed mode format lengths of per-P run queues as:
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// [len1 len2 len3 len4]
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print(" ")
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if i == 0 {
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print("[")
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}
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print(t - h)
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if i == gomaxprocs-1 {
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print("]\n")
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}
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}
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}
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if !detailed {
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unlock(&sched.lock)
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return
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}
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for mp := allm(); mp != nil; mp = mp.alllink {
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_p_ := mp.p.ptr()
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gp := mp.curg
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lockedg := mp.lockedg
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id1 := int32(-1)
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if _p_ != nil {
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id1 = _p_.id
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}
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id2 := int64(-1)
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if gp != nil {
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id2 = gp.goid
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}
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id3 := int64(-1)
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if lockedg != nil {
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id3 = lockedg.goid
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}
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print(" M", mp.id, ": p=", id1, " curg=", id2, " mallocing=", mp.mallocing, " throwing=", mp.throwing, " preemptoff=", mp.preemptoff, ""+" locks=", mp.locks, " dying=", mp.dying, " helpgc=", mp.helpgc, " spinning=", mp.spinning, " blocked=", mp.blocked, " lockedg=", id3, "\n")
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}
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lock(&allglock)
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for gi := 0; gi < len(allgs); gi++ {
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gp := allgs[gi]
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mp := gp.m
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lockedm := gp.lockedm
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id1 := int32(-1)
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if mp != nil {
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id1 = mp.id
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}
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id2 := int32(-1)
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if lockedm != nil {
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id2 = lockedm.id
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}
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print(" G", gp.goid, ": status=", readgstatus(gp), "(", gp.waitreason, ") m=", id1, " lockedm=", id2, "\n")
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}
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unlock(&allglock)
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unlock(&sched.lock)
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}
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@ -755,9 +755,13 @@ const _TracebackMaxFrames = 100
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var (
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// emptystring string
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// allglen uintptr
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allglen uintptr
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// allm *m
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// allp [_MaxGomaxprocs + 1]*p
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allp [_MaxGomaxprocs + 1]*p
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// gomaxprocs int32
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panicking uint32
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@ -476,12 +476,6 @@ func UnlockOSThread()
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func lockOSThread()
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func unlockOSThread()
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func allm() *m
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func allgs() []*g
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//go:nosplit
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func readgstatus(gp *g) uint32 {
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return atomic.Load(&gp.atomicstatus)
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}
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// Temporary for gccgo until we port malloc.go
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func persistentalloc(size, align uintptr, sysStat *uint64) unsafe.Pointer
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@ -489,9 +483,6 @@ func persistentalloc(size, align uintptr, sysStat *uint64) unsafe.Pointer
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// Temporary for gccgo until we port mheap.go
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func setprofilebucket(p unsafe.Pointer, b *bucket)
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// Currently in proc.c.
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func tracebackothers(*g)
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// Temporary for gccgo until we port mgc.go.
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func setgcpercent(int32) int32
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@ -530,9 +521,7 @@ func getZerobase() *uintptr {
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// Temporary for gccgo until we port proc.go.
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func sigprof()
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func mcount() int32
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func gcount() int32
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func goexit1()
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func schedtrace(bool)
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func freezetheworld()
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// Get signal trampoline, written in C.
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@ -562,6 +551,30 @@ func getCgoHasExtraM() *bool {
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return &cgoHasExtraM
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}
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// Temporary for gccgo until we port proc.go.
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//go:linkname getAllP runtime.getAllP
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func getAllP() **p {
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return &allp[0]
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}
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// Temporary for gccgo until we port proc.go.
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//go:linkname allocg runtime.allocg
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func allocg() *g {
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return new(g)
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}
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// Temporary for gccgo until we port the garbage collector.
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//go:linkname getallglen runtime.getallglen
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func getallglen() uintptr {
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return allglen
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}
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// Temporary for gccgo until we port the garbage collector.
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//go:linkname getallg runtime.getallg
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func getallg(i int) *g {
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return allgs[i]
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}
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// Throw and rethrow an exception.
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func throwException()
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func rethrowException()
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@ -579,3 +592,27 @@ func getPanicking() uint32 {
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// Temporary for gccgo until we port mcache.go.
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func allocmcache() *mcache
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// Temporary for gccgo until we port mgc.go.
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// This is just so that allgadd will compile.
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var work struct {
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rescan struct {
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lock mutex
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list []guintptr
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}
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}
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// gcount is temporary for gccgo until more of proc.go is ported.
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// This is a copy of the C function we used to use.
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func gcount() int32 {
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n := int32(0)
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lock(&allglock)
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for _, gp := range allgs {
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s := readgstatus(gp)
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if s == _Grunnable || s == _Grunning || s == _Gsyscall || s == _Gwaiting {
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n++
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}
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}
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unlock(&allglock)
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return n
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}
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@ -171,3 +171,58 @@ func isSystemGoroutine(gp *g) bool {
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// FIXME.
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return false
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}
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func tracebackothers(me *g) {
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var tb tracebackg
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tb.gp = me
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level, _, _ := gotraceback()
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// Show the current goroutine first, if we haven't already.
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g := getg()
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gp := g.m.curg
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if gp != nil && gp != me {
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print("\n")
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goroutineheader(gp)
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gp.traceback = &tb
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getTraceback(me, gp)
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printtrace(tb.locbuf[:tb.c], nil)
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printcreatedby(gp)
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}
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lock(&allglock)
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for _, gp := range allgs {
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if gp == me || gp == g.m.curg || readgstatus(gp) == _Gdead || isSystemGoroutine(gp) && level < 2 {
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continue
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}
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print("\n")
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goroutineheader(gp)
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// gccgo's only mechanism for doing a stack trace is
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// _Unwind_Backtrace. And that only works for the
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// current thread, not for other random goroutines.
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// So we need to switch context to the goroutine, get
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// the backtrace, and then switch back.
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//
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// This means that if g is running or in a syscall, we
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// can't reliably print a stack trace. FIXME.
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// Note: gp.m == g.m occurs when tracebackothers is
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// called from a signal handler initiated during a
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// systemstack call. The original G is still in the
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// running state, and we want to print its stack.
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if gp.m != g.m && readgstatus(gp)&^_Gscan == _Grunning {
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print("\tgoroutine running on other thread; stack unavailable\n")
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printcreatedby(gp)
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} else if readgstatus(gp)&^_Gscan == _Gsyscall {
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print("\tgoroutine in C code; stack unavailable\n")
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printcreatedby(gp)
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} else {
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gp.traceback = &tb
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getTraceback(me, gp)
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printtrace(tb.locbuf[:tb.c], nil)
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printcreatedby(gp)
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}
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}
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unlock(&allglock)
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}
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@ -13,7 +13,6 @@
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#include <unistd.h>
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#include "runtime.h"
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#include "go-alloc.h"
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#include "array.h"
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#include "arch.h"
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#include "malloc.h"
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@ -15,7 +15,6 @@
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#endif
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#include "runtime.h"
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#include "go-alloc.h"
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#include "array.h"
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#include "arch.h"
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#include "malloc.h"
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@ -4,7 +4,6 @@
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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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#include "go-alloc.h"
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#include "runtime.h"
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#include "arch.h"
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#include "malloc.h"
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@ -9,7 +9,6 @@
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#include <stdlib.h>
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#include "runtime.h"
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#include "go-alloc.h"
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#include "go-assert.h"
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#include "go-type.h"
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@ -14,7 +14,6 @@
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#include "unwind-pe.h"
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#include "runtime.h"
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#include "go-alloc.h"
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/* The code for a Go exception. */
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@ -311,8 +311,8 @@ dumpgs(void)
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uint32 i;
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// goroutines & stacks
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for(i = 0; i < runtime_allglen; i++) {
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gp = runtime_allg[i];
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for(i = 0; i < runtime_getallglen(); i++) {
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gp = runtime_getallg(i);
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switch(gp->atomicstatus){
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default:
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||||
runtime_printf("unexpected G.status %d\n", gp->atomicstatus);
|
||||
|
||||
@ -10,7 +10,6 @@ package runtime
|
||||
#include <stddef.h>
|
||||
#include <errno.h>
|
||||
#include <stdlib.h>
|
||||
#include "go-alloc.h"
|
||||
#include "runtime.h"
|
||||
#include "arch.h"
|
||||
#include "malloc.h"
|
||||
@ -308,107 +307,6 @@ runtime_profilealloc(void *v, uintptr size)
|
||||
runtime_MProf_Malloc(v, size);
|
||||
}
|
||||
|
||||
void*
|
||||
__go_alloc(uintptr size)
|
||||
{
|
||||
return runtime_mallocgc(size, 0, FlagNoInvokeGC);
|
||||
}
|
||||
|
||||
// Free the object whose base pointer is v.
|
||||
void
|
||||
__go_free(void *v)
|
||||
{
|
||||
M *m;
|
||||
int32 sizeclass;
|
||||
MSpan *s;
|
||||
MCache *c;
|
||||
uintptr size;
|
||||
|
||||
if(v == nil)
|
||||
return;
|
||||
|
||||
// If you change this also change mgc0.c:/^sweep,
|
||||
// which has a copy of the guts of free.
|
||||
|
||||
m = runtime_m();
|
||||
if(m->mallocing)
|
||||
runtime_throw("malloc/free - deadlock");
|
||||
m->mallocing = 1;
|
||||
|
||||
if(!runtime_mlookup(v, nil, nil, &s)) {
|
||||
runtime_printf("free %p: not an allocated block\n", v);
|
||||
runtime_throw("free runtime_mlookup");
|
||||
}
|
||||
size = s->elemsize;
|
||||
sizeclass = s->sizeclass;
|
||||
// Objects that are smaller than TinySize can be allocated using tiny alloc,
|
||||
// if then such object is combined with an object with finalizer, we will crash.
|
||||
if(size < TinySize)
|
||||
runtime_throw("freeing too small block");
|
||||
|
||||
if(runtime_debug.allocfreetrace)
|
||||
runtime_tracefree(v, size);
|
||||
|
||||
// Ensure that the span is swept.
|
||||
// If we free into an unswept span, we will corrupt GC bitmaps.
|
||||
runtime_MSpan_EnsureSwept(s);
|
||||
|
||||
if(s->specials != nil)
|
||||
runtime_freeallspecials(s, v, size);
|
||||
|
||||
c = m->mcache;
|
||||
if(sizeclass == 0) {
|
||||
// Large object.
|
||||
s->needzero = 1;
|
||||
// Must mark v freed before calling unmarkspan and MHeap_Free:
|
||||
// they might coalesce v into other spans and change the bitmap further.
|
||||
runtime_markfreed(v);
|
||||
runtime_unmarkspan(v, 1<<PageShift);
|
||||
// NOTE(rsc,dvyukov): The original implementation of efence
|
||||
// in CL 22060046 used SysFree instead of SysFault, so that
|
||||
// the operating system would eventually give the memory
|
||||
// back to us again, so that an efence program could run
|
||||
// longer without running out of memory. Unfortunately,
|
||||
// calling SysFree here without any kind of adjustment of the
|
||||
// heap data structures means that when the memory does
|
||||
// come back to us, we have the wrong metadata for it, either in
|
||||
// the MSpan structures or in the garbage collection bitmap.
|
||||
// Using SysFault here means that the program will run out of
|
||||
// memory fairly quickly in efence mode, but at least it won't
|
||||
// have mysterious crashes due to confused memory reuse.
|
||||
// It should be possible to switch back to SysFree if we also
|
||||
// implement and then call some kind of MHeap_DeleteSpan.
|
||||
if(runtime_debug.efence)
|
||||
runtime_SysFault((void*)(s->start<<PageShift), size);
|
||||
else
|
||||
runtime_MHeap_Free(&runtime_mheap, s, 1);
|
||||
c->local_nlargefree++;
|
||||
c->local_largefree += size;
|
||||
} else {
|
||||
// Small object.
|
||||
if(size > 2*sizeof(uintptr))
|
||||
((uintptr*)v)[1] = (uintptr)0xfeedfeedfeedfeedll; // mark as "needs to be zeroed"
|
||||
else if(size > sizeof(uintptr))
|
||||
((uintptr*)v)[1] = 0;
|
||||
// Must mark v freed before calling MCache_Free:
|
||||
// it might coalesce v and other blocks into a bigger span
|
||||
// and change the bitmap further.
|
||||
c->local_nsmallfree[sizeclass]++;
|
||||
c->local_cachealloc -= size;
|
||||
if(c->alloc[sizeclass] == s) {
|
||||
// We own the span, so we can just add v to the freelist
|
||||
runtime_markfreed(v);
|
||||
((MLink*)v)->next = s->freelist;
|
||||
s->freelist = v;
|
||||
s->ref--;
|
||||
} else {
|
||||
// Someone else owns this span. Add to free queue.
|
||||
runtime_MCache_Free(c, v, sizeclass, size);
|
||||
}
|
||||
}
|
||||
m->mallocing = 0;
|
||||
}
|
||||
|
||||
int32
|
||||
runtime_mlookup(void *v, byte **base, uintptr *size, MSpan **sp)
|
||||
{
|
||||
@ -628,9 +526,6 @@ runtime_mallocinit(void)
|
||||
// Initialize the rest of the allocator.
|
||||
runtime_MHeap_Init(&runtime_mheap);
|
||||
runtime_m()->mcache = runtime_allocmcache();
|
||||
|
||||
// See if it works.
|
||||
runtime_free(runtime_malloc(TinySize));
|
||||
}
|
||||
|
||||
void*
|
||||
|
||||
@ -1279,7 +1279,6 @@ markroot(ParFor *desc, uint32 i)
|
||||
// For gccgo we use this for all the other global roots.
|
||||
enqueue1(&wbuf, (Obj){(byte*)&runtime_m0, sizeof runtime_m0, 0});
|
||||
enqueue1(&wbuf, (Obj){(byte*)&runtime_g0, sizeof runtime_g0, 0});
|
||||
enqueue1(&wbuf, (Obj){(byte*)&runtime_allg, sizeof runtime_allg, 0});
|
||||
enqueue1(&wbuf, (Obj){(byte*)&runtime_allm, sizeof runtime_allm, 0});
|
||||
enqueue1(&wbuf, (Obj){(byte*)&runtime_allp, sizeof runtime_allp, 0});
|
||||
enqueue1(&wbuf, (Obj){(byte*)&work, sizeof work, 0});
|
||||
@ -1334,9 +1333,9 @@ markroot(ParFor *desc, uint32 i)
|
||||
|
||||
default:
|
||||
// the rest is scanning goroutine stacks
|
||||
if(i - RootCount >= runtime_allglen)
|
||||
if(i - RootCount >= runtime_getallglen())
|
||||
runtime_throw("markroot: bad index");
|
||||
gp = runtime_allg[i - RootCount];
|
||||
gp = runtime_getallg(i - RootCount);
|
||||
// remember when we've first observed the G blocked
|
||||
// needed only to output in traceback
|
||||
if((gp->atomicstatus == _Gwaiting || gp->atomicstatus == _Gsyscall) && gp->waitsince == 0)
|
||||
@ -2243,7 +2242,7 @@ gc(struct gc_args *args)
|
||||
work.nwait = 0;
|
||||
work.ndone = 0;
|
||||
work.nproc = runtime_gcprocs();
|
||||
runtime_parforsetup(work.markfor, work.nproc, RootCount + runtime_allglen, false, &markroot_funcval);
|
||||
runtime_parforsetup(work.markfor, work.nproc, RootCount + runtime_getallglen(), false, &markroot_funcval);
|
||||
if(work.nproc > 1) {
|
||||
runtime_noteclear(&work.alldone);
|
||||
runtime_helpgc(work.nproc);
|
||||
|
||||
@ -5,6 +5,7 @@
|
||||
// Parallel for algorithm.
|
||||
|
||||
#include "runtime.h"
|
||||
#include "malloc.h"
|
||||
#include "arch.h"
|
||||
|
||||
struct ParForThread
|
||||
@ -27,7 +28,7 @@ runtime_parforalloc(uint32 nthrmax)
|
||||
|
||||
// The ParFor object is followed by CacheLineSize padding
|
||||
// and then nthrmax ParForThread.
|
||||
desc = (ParFor*)runtime_malloc(sizeof(ParFor) + CacheLineSize + nthrmax * sizeof(ParForThread));
|
||||
desc = (ParFor*)runtime_mallocgc(sizeof(ParFor) + CacheLineSize + nthrmax * sizeof(ParForThread), 0, FlagNoInvokeGC);
|
||||
desc->thr = (ParForThread*)((byte*)(desc+1) + CacheLineSize);
|
||||
desc->nthrmax = nthrmax;
|
||||
return desc;
|
||||
|
||||
@ -361,6 +361,10 @@ enum
|
||||
extern Sched* runtime_getsched() __asm__ (GOSYM_PREFIX "runtime.getsched");
|
||||
extern bool* runtime_getCgoHasExtraM()
|
||||
__asm__ (GOSYM_PREFIX "runtime.getCgoHasExtraM");
|
||||
extern P** runtime_getAllP()
|
||||
__asm__ (GOSYM_PREFIX "runtime.getAllP");
|
||||
extern G* allocg(void)
|
||||
__asm__ (GOSYM_PREFIX "runtime.allocg");
|
||||
|
||||
Sched* runtime_sched;
|
||||
int32 runtime_gomaxprocs;
|
||||
@ -374,11 +378,6 @@ int32 runtime_ncpu;
|
||||
bool runtime_precisestack;
|
||||
static int32 newprocs;
|
||||
|
||||
static Lock allglock; // the following vars are protected by this lock or by stoptheworld
|
||||
G** runtime_allg;
|
||||
uintptr runtime_allglen;
|
||||
static uintptr allgcap;
|
||||
|
||||
bool runtime_isarchive;
|
||||
|
||||
void* runtime_mstart(void*);
|
||||
@ -403,7 +402,6 @@ static void startlockedm(G*);
|
||||
static void sysmon(void);
|
||||
static uint32 retake(int64);
|
||||
static void incidlelocked(int32);
|
||||
static void checkdead(void);
|
||||
static void exitsyscall0(G*);
|
||||
static void park0(G*);
|
||||
static void goexit0(G*);
|
||||
@ -421,6 +419,8 @@ static bool exitsyscallfast(void);
|
||||
|
||||
void allgadd(G*)
|
||||
__asm__(GOSYM_PREFIX "runtime.allgadd");
|
||||
void checkdead(void)
|
||||
__asm__(GOSYM_PREFIX "runtime.checkdead");
|
||||
|
||||
bool runtime_isstarted;
|
||||
|
||||
@ -482,7 +482,7 @@ runtime_schedinit(void)
|
||||
n = _MaxGomaxprocs;
|
||||
procs = n;
|
||||
}
|
||||
runtime_allp = runtime_malloc((_MaxGomaxprocs+1)*sizeof(runtime_allp[0]));
|
||||
runtime_allp = runtime_getAllP();
|
||||
procresize(procs);
|
||||
|
||||
// Can not enable GC until all roots are registered.
|
||||
@ -586,85 +586,25 @@ runtime_main(void* dummy __attribute__((unused)))
|
||||
*(int32*)0 = 0;
|
||||
}
|
||||
|
||||
void
|
||||
runtime_tracebackothers(G * volatile me)
|
||||
void getTraceback(G*, G*) __asm__(GOSYM_PREFIX "runtime.getTraceback");
|
||||
|
||||
// getTraceback stores a traceback of gp in the g's traceback field
|
||||
// and then returns to me. We expect that gp's traceback is not nil.
|
||||
// It works by saving me's current context, and checking gp's traceback field.
|
||||
// If gp's traceback field is not nil, it starts running gp.
|
||||
// In places where we call getcontext, we check the traceback field.
|
||||
// If it is not nil, we collect a traceback, and then return to the
|
||||
// goroutine stored in the traceback field, which is me.
|
||||
void getTraceback(G* me, G* gp)
|
||||
{
|
||||
G * volatile gp;
|
||||
Traceback tb;
|
||||
int32 traceback;
|
||||
Slice slice;
|
||||
volatile uintptr i;
|
||||
|
||||
tb.gp = me;
|
||||
traceback = runtime_gotraceback(nil);
|
||||
|
||||
// Show the current goroutine first, if we haven't already.
|
||||
if((gp = g->m->curg) != nil && gp != me) {
|
||||
runtime_printf("\n");
|
||||
runtime_goroutineheader(gp);
|
||||
gp->traceback = &tb;
|
||||
|
||||
#ifdef USING_SPLIT_STACK
|
||||
__splitstack_getcontext(&me->stackcontext[0]);
|
||||
__splitstack_getcontext(&me->stackcontext[0]);
|
||||
#endif
|
||||
getcontext(ucontext_arg(&me->context[0]));
|
||||
getcontext(ucontext_arg(&me->stackcontext[0]));
|
||||
|
||||
if(gp->traceback != nil) {
|
||||
runtime_gogo(gp);
|
||||
}
|
||||
|
||||
slice.__values = &tb.locbuf[0];
|
||||
slice.__count = tb.c;
|
||||
slice.__capacity = tb.c;
|
||||
runtime_printtrace(slice, nil);
|
||||
runtime_printcreatedby(gp);
|
||||
if (gp->traceback != nil) {
|
||||
runtime_gogo(gp);
|
||||
}
|
||||
|
||||
runtime_lock(&allglock);
|
||||
for(i = 0; i < runtime_allglen; i++) {
|
||||
gp = runtime_allg[i];
|
||||
if(gp == me || gp == g->m->curg || gp->atomicstatus == _Gdead)
|
||||
continue;
|
||||
if(gp->issystem && traceback < 2)
|
||||
continue;
|
||||
runtime_printf("\n");
|
||||
runtime_goroutineheader(gp);
|
||||
|
||||
// Our only mechanism for doing a stack trace is
|
||||
// _Unwind_Backtrace. And that only works for the
|
||||
// current thread, not for other random goroutines.
|
||||
// So we need to switch context to the goroutine, get
|
||||
// the backtrace, and then switch back.
|
||||
|
||||
// This means that if g is running or in a syscall, we
|
||||
// can't reliably print a stack trace. FIXME.
|
||||
|
||||
if(gp->atomicstatus == _Grunning) {
|
||||
runtime_printf("\tgoroutine running on other thread; stack unavailable\n");
|
||||
runtime_printcreatedby(gp);
|
||||
} else if(gp->atomicstatus == _Gsyscall) {
|
||||
runtime_printf("\tgoroutine in C code; stack unavailable\n");
|
||||
runtime_printcreatedby(gp);
|
||||
} else {
|
||||
gp->traceback = &tb;
|
||||
|
||||
#ifdef USING_SPLIT_STACK
|
||||
__splitstack_getcontext(&me->stackcontext[0]);
|
||||
#endif
|
||||
getcontext(ucontext_arg(&me->context[0]));
|
||||
|
||||
if(gp->traceback != nil) {
|
||||
runtime_gogo(gp);
|
||||
}
|
||||
|
||||
slice.__values = &tb.locbuf[0];
|
||||
slice.__count = tb.c;
|
||||
slice.__capacity = tb.c;
|
||||
runtime_printtrace(slice, nil);
|
||||
runtime_printcreatedby(gp);
|
||||
}
|
||||
}
|
||||
runtime_unlock(&allglock);
|
||||
}
|
||||
|
||||
static void
|
||||
@ -1067,22 +1007,6 @@ runtime_allocm(P *p, bool allocatestack, byte** ret_g0_stack, uintptr* ret_g0_st
|
||||
return mp;
|
||||
}
|
||||
|
||||
static G*
|
||||
allocg(void)
|
||||
{
|
||||
G *gp;
|
||||
// static Type *gtype;
|
||||
|
||||
// if(gtype == nil) {
|
||||
// Eface e;
|
||||
// runtime_gc_g_ptr(&e);
|
||||
// gtype = ((PtrType*)e.__type_descriptor)->__element_type;
|
||||
// }
|
||||
// gp = runtime_cnew(gtype);
|
||||
gp = runtime_malloc(sizeof(G));
|
||||
return gp;
|
||||
}
|
||||
|
||||
void setGContext(void) __asm__ (GOSYM_PREFIX "runtime.setGContext");
|
||||
|
||||
// setGContext sets up a new goroutine context for the current g.
|
||||
@ -2129,6 +2053,7 @@ __go_go(void (*fn)(void*), void* arg)
|
||||
|
||||
newg = runtime_malg(true, false, &sp, &malsize);
|
||||
spsize = (size_t)malsize;
|
||||
newg->atomicstatus = _Gdead;
|
||||
allgadd(newg);
|
||||
}
|
||||
|
||||
@ -2152,31 +2077,6 @@ __go_go(void (*fn)(void*), void* arg)
|
||||
return newg;
|
||||
}
|
||||
|
||||
void
|
||||
allgadd(G *gp)
|
||||
{
|
||||
G **new;
|
||||
uintptr cap;
|
||||
|
||||
runtime_lock(&allglock);
|
||||
if(runtime_allglen >= allgcap) {
|
||||
cap = 4096/sizeof(new[0]);
|
||||
if(cap < 2*allgcap)
|
||||
cap = 2*allgcap;
|
||||
new = runtime_malloc(cap*sizeof(new[0]));
|
||||
if(new == nil)
|
||||
runtime_throw("runtime: cannot allocate memory");
|
||||
if(runtime_allg != nil) {
|
||||
runtime_memmove(new, runtime_allg, runtime_allglen*sizeof(new[0]));
|
||||
runtime_free(runtime_allg);
|
||||
}
|
||||
runtime_allg = new;
|
||||
allgcap = cap;
|
||||
}
|
||||
runtime_allg[runtime_allglen++] = gp;
|
||||
runtime_unlock(&allglock);
|
||||
}
|
||||
|
||||
// Put on gfree list.
|
||||
// If local list is too long, transfer a batch to the global list.
|
||||
static void
|
||||
@ -2351,29 +2251,6 @@ runtime_lockedOSThread(void)
|
||||
return g->lockedm != nil && g->m->lockedg != nil;
|
||||
}
|
||||
|
||||
int32
|
||||
runtime_gcount(void)
|
||||
{
|
||||
G *gp;
|
||||
int32 n, s;
|
||||
uintptr i;
|
||||
|
||||
n = 0;
|
||||
runtime_lock(&allglock);
|
||||
// TODO(dvyukov): runtime.NumGoroutine() is O(N).
|
||||
// We do not want to increment/decrement centralized counter in newproc/goexit,
|
||||
// just to make runtime.NumGoroutine() faster.
|
||||
// Compromise solution is to introduce per-P counters of active goroutines.
|
||||
for(i = 0; i < runtime_allglen; i++) {
|
||||
gp = runtime_allg[i];
|
||||
s = gp->atomicstatus;
|
||||
if(s == _Grunnable || s == _Grunning || s == _Gsyscall || s == _Gwaiting)
|
||||
n++;
|
||||
}
|
||||
runtime_unlock(&allglock);
|
||||
return n;
|
||||
}
|
||||
|
||||
int32
|
||||
runtime_mcount(void)
|
||||
{
|
||||
@ -2638,59 +2515,6 @@ incidlelocked(int32 v)
|
||||
runtime_unlock(&runtime_sched->lock);
|
||||
}
|
||||
|
||||
// Check for deadlock situation.
|
||||
// The check is based on number of running M's, if 0 -> deadlock.
|
||||
static void
|
||||
checkdead(void)
|
||||
{
|
||||
G *gp;
|
||||
int32 run, grunning, s;
|
||||
uintptr i;
|
||||
|
||||
// For -buildmode=c-shared or -buildmode=c-archive it's OK if
|
||||
// there are no running goroutines. The calling program is
|
||||
// assumed to be running.
|
||||
if(runtime_isarchive) {
|
||||
return;
|
||||
}
|
||||
|
||||
// -1 for sysmon
|
||||
run = runtime_sched->mcount - runtime_sched->nmidle - runtime_sched->nmidlelocked - 1;
|
||||
if(run > 0)
|
||||
return;
|
||||
// If we are dying because of a signal caught on an already idle thread,
|
||||
// freezetheworld will cause all running threads to block.
|
||||
// And runtime will essentially enter into deadlock state,
|
||||
// except that there is a thread that will call runtime_exit soon.
|
||||
if(runtime_panicking() > 0)
|
||||
return;
|
||||
if(run < 0) {
|
||||
runtime_printf("runtime: checkdead: nmidle=%d nmidlelocked=%d mcount=%d\n",
|
||||
runtime_sched->nmidle, runtime_sched->nmidlelocked, runtime_sched->mcount);
|
||||
runtime_throw("checkdead: inconsistent counts");
|
||||
}
|
||||
grunning = 0;
|
||||
runtime_lock(&allglock);
|
||||
for(i = 0; i < runtime_allglen; i++) {
|
||||
gp = runtime_allg[i];
|
||||
if(gp->isbackground)
|
||||
continue;
|
||||
s = gp->atomicstatus;
|
||||
if(s == _Gwaiting)
|
||||
grunning++;
|
||||
else if(s == _Grunnable || s == _Grunning || s == _Gsyscall) {
|
||||
runtime_unlock(&allglock);
|
||||
runtime_printf("runtime: checkdead: find g %D in status %d\n", gp->goid, s);
|
||||
runtime_throw("checkdead: runnable g");
|
||||
}
|
||||
}
|
||||
runtime_unlock(&allglock);
|
||||
if(grunning == 0) // possible if main goroutine calls runtime_Goexit()
|
||||
runtime_throw("no goroutines (main called runtime.Goexit) - deadlock!");
|
||||
g->m->throwing = -1; // do not dump full stacks
|
||||
runtime_throw("all goroutines are asleep - deadlock!");
|
||||
}
|
||||
|
||||
static void
|
||||
sysmon(void)
|
||||
{
|
||||
@ -2832,94 +2656,6 @@ preemptall(void)
|
||||
return false;
|
||||
}
|
||||
|
||||
void
|
||||
runtime_schedtrace(bool detailed)
|
||||
{
|
||||
static int64 starttime;
|
||||
int64 now;
|
||||
int64 id1, id2, id3;
|
||||
int32 i, t, h;
|
||||
uintptr gi;
|
||||
const char *fmt;
|
||||
M *mp, *lockedm;
|
||||
G *gp, *lockedg;
|
||||
P *p;
|
||||
|
||||
now = runtime_nanotime();
|
||||
if(starttime == 0)
|
||||
starttime = now;
|
||||
|
||||
runtime_lock(&runtime_sched->lock);
|
||||
runtime_printf("SCHED %Dms: gomaxprocs=%d idleprocs=%d threads=%d idlethreads=%d runqueue=%d",
|
||||
(now-starttime)/1000000, runtime_gomaxprocs, runtime_sched->npidle, runtime_sched->mcount,
|
||||
runtime_sched->nmidle, runtime_sched->runqsize);
|
||||
if(detailed) {
|
||||
runtime_printf(" gcwaiting=%d nmidlelocked=%d nmspinning=%d stopwait=%d sysmonwait=%d\n",
|
||||
runtime_sched->gcwaiting, runtime_sched->nmidlelocked, runtime_sched->nmspinning,
|
||||
runtime_sched->stopwait, runtime_sched->sysmonwait);
|
||||
}
|
||||
// We must be careful while reading data from P's, M's and G's.
|
||||
// Even if we hold schedlock, most data can be changed concurrently.
|
||||
// E.g. (p->m ? p->m->id : -1) can crash if p->m changes from non-nil to nil.
|
||||
for(i = 0; i < runtime_gomaxprocs; i++) {
|
||||
p = runtime_allp[i];
|
||||
if(p == nil)
|
||||
continue;
|
||||
mp = (M*)p->m;
|
||||
h = runtime_atomicload(&p->runqhead);
|
||||
t = runtime_atomicload(&p->runqtail);
|
||||
if(detailed)
|
||||
runtime_printf(" P%d: status=%d schedtick=%d syscalltick=%d m=%d runqsize=%d gfreecnt=%d\n",
|
||||
i, p->status, p->schedtick, p->syscalltick, mp ? mp->id : -1, t-h, p->gfreecnt);
|
||||
else {
|
||||
// In non-detailed mode format lengths of per-P run queues as:
|
||||
// [len1 len2 len3 len4]
|
||||
fmt = " %d";
|
||||
if(runtime_gomaxprocs == 1)
|
||||
fmt = " [%d]\n";
|
||||
else if(i == 0)
|
||||
fmt = " [%d";
|
||||
else if(i == runtime_gomaxprocs-1)
|
||||
fmt = " %d]\n";
|
||||
runtime_printf(fmt, t-h);
|
||||
}
|
||||
}
|
||||
if(!detailed) {
|
||||
runtime_unlock(&runtime_sched->lock);
|
||||
return;
|
||||
}
|
||||
for(mp = runtime_allm; mp; mp = mp->alllink) {
|
||||
p = (P*)mp->p;
|
||||
gp = mp->curg;
|
||||
lockedg = mp->lockedg;
|
||||
id1 = -1;
|
||||
if(p)
|
||||
id1 = p->id;
|
||||
id2 = -1;
|
||||
if(gp)
|
||||
id2 = gp->goid;
|
||||
id3 = -1;
|
||||
if(lockedg)
|
||||
id3 = lockedg->goid;
|
||||
runtime_printf(" M%d: p=%D curg=%D mallocing=%d throwing=%d gcing=%d"
|
||||
" locks=%d dying=%d helpgc=%d spinning=%d blocked=%d lockedg=%D\n",
|
||||
mp->id, id1, id2,
|
||||
mp->mallocing, mp->throwing, mp->gcing, mp->locks, mp->dying, mp->helpgc,
|
||||
mp->spinning, mp->blocked, id3);
|
||||
}
|
||||
runtime_lock(&allglock);
|
||||
for(gi = 0; gi < runtime_allglen; gi++) {
|
||||
gp = runtime_allg[gi];
|
||||
mp = gp->m;
|
||||
lockedm = gp->lockedm;
|
||||
runtime_printf(" G%D: status=%d(%S) m=%d lockedm=%d\n",
|
||||
gp->goid, gp->atomicstatus, gp->waitreason, mp ? mp->id : -1,
|
||||
lockedm ? lockedm->id : -1);
|
||||
}
|
||||
runtime_unlock(&allglock);
|
||||
runtime_unlock(&runtime_sched->lock);
|
||||
}
|
||||
|
||||
// Put mp on midle list.
|
||||
// Sched must be locked.
|
||||
static void
|
||||
@ -3357,20 +3093,6 @@ runtime_go_allm()
|
||||
return &runtime_allm;
|
||||
}
|
||||
|
||||
extern Slice runtime_go_allgs(void)
|
||||
__asm__ (GOSYM_PREFIX "runtime.allgs");
|
||||
|
||||
Slice
|
||||
runtime_go_allgs()
|
||||
{
|
||||
Slice s;
|
||||
|
||||
s.__values = runtime_allg;
|
||||
s.__count = runtime_allglen;
|
||||
s.__capacity = allgcap;
|
||||
return s;
|
||||
}
|
||||
|
||||
intgo NumCPU(void) __asm__ (GOSYM_PREFIX "runtime.NumCPU");
|
||||
|
||||
intgo
|
||||
|
||||
@ -7,6 +7,7 @@
|
||||
#include "go-assert.h"
|
||||
#include <complex.h>
|
||||
#include <signal.h>
|
||||
#include <stdint.h>
|
||||
#include <stdio.h>
|
||||
#include <stdlib.h>
|
||||
#include <string.h>
|
||||
@ -22,8 +23,6 @@
|
||||
#include <sys/mman.h>
|
||||
#endif
|
||||
|
||||
#include "go-alloc.h"
|
||||
|
||||
#define _STRINGIFY2_(x) #x
|
||||
#define _STRINGIFY_(x) _STRINGIFY2_(x)
|
||||
#define GOSYM_PREFIX _STRINGIFY_(__USER_LABEL_PREFIX__)
|
||||
@ -233,8 +232,10 @@ enum
|
||||
*/
|
||||
extern uintptr* runtime_getZerobase(void)
|
||||
__asm__(GOSYM_PREFIX "runtime.getZerobase");
|
||||
extern G** runtime_allg;
|
||||
extern uintptr runtime_allglen;
|
||||
extern G* runtime_getallg(intgo)
|
||||
__asm__(GOSYM_PREFIX "runtime.getallg");
|
||||
extern uintptr runtime_getallglen(void)
|
||||
__asm__(GOSYM_PREFIX "runtime.getallglen");
|
||||
extern G* runtime_lastg;
|
||||
extern M* runtime_allm;
|
||||
extern P** runtime_allp;
|
||||
@ -309,13 +310,9 @@ MCache* runtime_allocmcache(void)
|
||||
void runtime_freemcache(MCache*);
|
||||
void runtime_mallocinit(void);
|
||||
void runtime_mprofinit(void);
|
||||
#define runtime_malloc(s) __go_alloc(s)
|
||||
#define runtime_free(p) __go_free(p)
|
||||
#define runtime_getcallersp(p) __builtin_frame_address(0)
|
||||
int32 runtime_mcount(void)
|
||||
__asm__ (GOSYM_PREFIX "runtime.mcount");
|
||||
int32 runtime_gcount(void)
|
||||
__asm__ (GOSYM_PREFIX "runtime.gcount");
|
||||
void runtime_mcall(void(*)(G*));
|
||||
uint32 runtime_fastrand1(void) __asm__ (GOSYM_PREFIX "runtime.fastrand1");
|
||||
int32 runtime_timediv(int64, int32, int32*)
|
||||
|
||||
@ -25,7 +25,8 @@ extern volatile intgo runtime_MemProfileRate
|
||||
|
||||
struct gotraceback_ret {
|
||||
int32 level;
|
||||
bool crash;
|
||||
bool all;
|
||||
bool crash;
|
||||
};
|
||||
|
||||
extern struct gotraceback_ret gotraceback(void)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user