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https://github.com/golang/go
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os: consolidate os{1,2}_*.go files
Change-Id: I463ca59f486b2842f67f151a55f530ee10663830 Reviewed-on: https://go-review.googlesource.com/21568 Run-TryBot: Brad Fitzpatrick <bradfitz@golang.org> Reviewed-by: Dave Cheney <dave@cheney.net> Reviewed-by: Minux Ma <minux@golang.org> TryBot-Result: Gobot Gobot <gobot@golang.org>
This commit is contained in:
parent
fd2bb1e30a
commit
8455f3a3d5
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@ -1,270 +0,0 @@
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// Copyright 2011 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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import "unsafe"
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// From DragonFly's <sys/sysctl.h>
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const (
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_CTL_HW = 6
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_HW_NCPU = 3
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)
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var sigset_all = sigset{[4]uint32{^uint32(0), ^uint32(0), ^uint32(0), ^uint32(0)}}
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func getncpu() int32 {
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mib := [2]uint32{_CTL_HW, _HW_NCPU}
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out := uint32(0)
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nout := unsafe.Sizeof(out)
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ret := sysctl(&mib[0], 2, (*byte)(unsafe.Pointer(&out)), &nout, nil, 0)
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if ret >= 0 {
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return int32(out)
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}
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return 1
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}
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//go:nosplit
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func futexsleep(addr *uint32, val uint32, ns int64) {
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systemstack(func() {
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futexsleep1(addr, val, ns)
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})
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}
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func futexsleep1(addr *uint32, val uint32, ns int64) {
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var timeout int32
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if ns >= 0 {
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// The timeout is specified in microseconds - ensure that we
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// do not end up dividing to zero, which would put us to sleep
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// indefinitely...
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timeout = timediv(ns, 1000, nil)
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if timeout == 0 {
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timeout = 1
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}
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}
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// sys_umtx_sleep will return EWOULDBLOCK (EAGAIN) when the timeout
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// expires or EBUSY if the mutex value does not match.
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ret := sys_umtx_sleep(addr, int32(val), timeout)
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if ret >= 0 || ret == -_EINTR || ret == -_EAGAIN || ret == -_EBUSY {
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return
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}
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print("umtx_sleep addr=", addr, " val=", val, " ret=", ret, "\n")
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*(*int32)(unsafe.Pointer(uintptr(0x1005))) = 0x1005
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}
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//go:nosplit
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func futexwakeup(addr *uint32, cnt uint32) {
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ret := sys_umtx_wakeup(addr, int32(cnt))
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if ret >= 0 {
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return
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}
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systemstack(func() {
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print("umtx_wake_addr=", addr, " ret=", ret, "\n")
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*(*int32)(unsafe.Pointer(uintptr(0x1006))) = 0x1006
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})
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}
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func lwp_start(uintptr)
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// May run with m.p==nil, so write barriers are not allowed.
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//go:nowritebarrier
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func newosproc(mp *m, stk unsafe.Pointer) {
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if false {
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print("newosproc stk=", stk, " m=", mp, " g=", mp.g0, " lwp_start=", funcPC(lwp_start), " id=", mp.id, " ostk=", &mp, "\n")
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}
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var oset sigset
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sigprocmask(_SIG_SETMASK, &sigset_all, &oset)
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params := lwpparams{
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start_func: funcPC(lwp_start),
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arg: unsafe.Pointer(mp),
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stack: uintptr(stk),
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tid1: unsafe.Pointer(&mp.procid),
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tid2: nil,
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}
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lwp_create(¶ms)
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sigprocmask(_SIG_SETMASK, &oset, nil)
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}
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func osinit() {
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ncpu = getncpu()
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}
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var urandom_dev = []byte("/dev/urandom\x00")
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//go:nosplit
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func getRandomData(r []byte) {
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fd := open(&urandom_dev[0], 0 /* O_RDONLY */, 0)
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n := read(fd, unsafe.Pointer(&r[0]), int32(len(r)))
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closefd(fd)
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extendRandom(r, int(n))
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}
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func goenvs() {
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goenvs_unix()
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}
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// Called to initialize a new m (including the bootstrap m).
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// Called on the parent thread (main thread in case of bootstrap), can allocate memory.
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func mpreinit(mp *m) {
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mp.gsignal = malg(32 * 1024)
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mp.gsignal.m = mp
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}
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//go:nosplit
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func msigsave(mp *m) {
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sigprocmask(_SIG_SETMASK, nil, &mp.sigmask)
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}
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//go:nosplit
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func msigrestore(sigmask sigset) {
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sigprocmask(_SIG_SETMASK, &sigmask, nil)
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}
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//go:nosplit
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func sigblock() {
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sigprocmask(_SIG_SETMASK, &sigset_all, nil)
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}
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// Called to initialize a new m (including the bootstrap m).
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// Called on the new thread, cannot allocate memory.
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func minit() {
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_g_ := getg()
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// m.procid is a uint64, but lwp_start writes an int32. Fix it up.
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_g_.m.procid = uint64(*(*int32)(unsafe.Pointer(&_g_.m.procid)))
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// Initialize signal handling.
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// On DragonFly a thread created by pthread_create inherits
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// the signal stack of the creating thread. We always create
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// a new signal stack here, to avoid having two Go threads
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// using the same signal stack. This breaks the case of a
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// thread created in C that calls sigaltstack and then calls a
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// Go function, because we will lose track of the C code's
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// sigaltstack, but it's the best we can do.
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signalstack(&_g_.m.gsignal.stack)
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_g_.m.newSigstack = true
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// restore signal mask from m.sigmask and unblock essential signals
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nmask := _g_.m.sigmask
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for i := range sigtable {
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if sigtable[i].flags&_SigUnblock != 0 {
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nmask.__bits[(i-1)/32] &^= 1 << ((uint32(i) - 1) & 31)
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}
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}
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sigprocmask(_SIG_SETMASK, &nmask, nil)
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}
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// Called from dropm to undo the effect of an minit.
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//go:nosplit
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func unminit() {
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if getg().m.newSigstack {
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signalstack(nil)
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}
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}
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func memlimit() uintptr {
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/*
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TODO: Convert to Go when something actually uses the result.
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Rlimit rl;
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extern byte runtime·text[], runtime·end[];
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uintptr used;
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if(runtime·getrlimit(RLIMIT_AS, &rl) != 0)
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return 0;
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if(rl.rlim_cur >= 0x7fffffff)
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return 0;
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// Estimate our VM footprint excluding the heap.
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// Not an exact science: use size of binary plus
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// some room for thread stacks.
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used = runtime·end - runtime·text + (64<<20);
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if(used >= rl.rlim_cur)
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return 0;
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// If there's not at least 16 MB left, we're probably
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// not going to be able to do much. Treat as no limit.
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rl.rlim_cur -= used;
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if(rl.rlim_cur < (16<<20))
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return 0;
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return rl.rlim_cur - used;
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*/
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return 0
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}
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func sigtramp()
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type sigactiont struct {
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sa_sigaction uintptr
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sa_flags int32
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sa_mask sigset
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}
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//go:nosplit
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//go:nowritebarrierrec
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func setsig(i int32, fn uintptr, restart bool) {
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var sa sigactiont
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sa.sa_flags = _SA_SIGINFO | _SA_ONSTACK
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if restart {
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sa.sa_flags |= _SA_RESTART
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}
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sa.sa_mask = sigset_all
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if fn == funcPC(sighandler) {
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fn = funcPC(sigtramp)
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}
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sa.sa_sigaction = fn
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sigaction(i, &sa, nil)
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}
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//go:nosplit
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//go:nowritebarrierrec
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func setsigstack(i int32) {
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throw("setsigstack")
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}
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//go:nosplit
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//go:nowritebarrierrec
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func getsig(i int32) uintptr {
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var sa sigactiont
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sigaction(i, nil, &sa)
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if sa.sa_sigaction == funcPC(sigtramp) {
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return funcPC(sighandler)
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}
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return sa.sa_sigaction
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}
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//go:nosplit
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func signalstack(s *stack) {
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var st sigaltstackt
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if s == nil {
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st.ss_flags = _SS_DISABLE
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} else {
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st.ss_sp = s.lo
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st.ss_size = s.hi - s.lo
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st.ss_flags = 0
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}
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sigaltstack(&st, nil)
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}
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//go:nosplit
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//go:nowritebarrierrec
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func updatesigmask(m sigmask) {
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var mask sigset
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copy(mask.__bits[:], m[:])
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sigprocmask(_SIG_SETMASK, &mask, nil)
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}
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func unblocksig(sig int32) {
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var mask sigset
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mask.__bits[(sig-1)/32] |= 1 << ((uint32(sig) - 1) & 31)
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sigprocmask(_SIG_UNBLOCK, &mask, nil)
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}
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@ -1,28 +0,0 @@
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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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// +build !mips64
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// +build !mips64le
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// +build !s390x
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// +build linux
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package runtime
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var sigset_all = sigset{^uint32(0), ^uint32(0)}
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func sigaddset(mask *sigset, i int) {
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(*mask)[(i-1)/32] |= 1 << ((uint32(i) - 1) & 31)
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}
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func sigdelset(mask *sigset, i int) {
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(*mask)[(i-1)/32] &^= 1 << ((uint32(i) - 1) & 31)
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}
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func sigfillset(mask *uint64) {
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*mask = ^uint64(0)
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}
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func sigcopyset(mask *sigset, m sigmask) {
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copy((*mask)[:], m[:])
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}
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@ -1,26 +0,0 @@
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// Copyright 2015 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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// +build mips64 mips64le
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// +build linux
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package runtime
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var sigset_all = sigset{^uint64(0), ^uint64(0)}
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func sigaddset(mask *sigset, i int) {
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(*mask)[(i-1)/64] |= 1 << ((uint32(i) - 1) & 63)
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}
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func sigdelset(mask *sigset, i int) {
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(*mask)[(i-1)/64] &^= 1 << ((uint32(i) - 1) & 63)
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}
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func sigfillset(mask *[2]uint64) {
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(*mask)[0], (*mask)[1] = ^uint64(0), ^uint64(0)
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}
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func sigcopyset(mask *sigset, m sigmask) {
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(*mask)[0] = uint64(m[0]) | uint64(m[1])<<32
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}
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@ -1,275 +0,0 @@
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// Copyright 2011 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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import (
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"runtime/internal/atomic"
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"unsafe"
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)
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const (
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_ESRCH = 3
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_ETIMEDOUT = 60
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// From NetBSD's <sys/time.h>
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_CLOCK_REALTIME = 0
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_CLOCK_VIRTUAL = 1
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_CLOCK_PROF = 2
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_CLOCK_MONOTONIC = 3
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)
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var sigset_all = sigset{[4]uint32{^uint32(0), ^uint32(0), ^uint32(0), ^uint32(0)}}
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// From NetBSD's <sys/sysctl.h>
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const (
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_CTL_HW = 6
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_HW_NCPU = 3
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)
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func getncpu() int32 {
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mib := [2]uint32{_CTL_HW, _HW_NCPU}
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out := uint32(0)
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nout := unsafe.Sizeof(out)
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ret := sysctl(&mib[0], 2, (*byte)(unsafe.Pointer(&out)), &nout, nil, 0)
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if ret >= 0 {
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return int32(out)
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}
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return 1
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}
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//go:nosplit
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func semacreate(mp *m) {
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}
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//go:nosplit
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func semasleep(ns int64) int32 {
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_g_ := getg()
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// Compute sleep deadline.
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var tsp *timespec
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if ns >= 0 {
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var ts timespec
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var nsec int32
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ns += nanotime()
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ts.set_sec(timediv(ns, 1000000000, &nsec))
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ts.set_nsec(nsec)
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tsp = &ts
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}
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for {
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v := atomic.Load(&_g_.m.waitsemacount)
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if v > 0 {
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if atomic.Cas(&_g_.m.waitsemacount, v, v-1) {
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return 0 // semaphore acquired
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}
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continue
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}
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// Sleep until unparked by semawakeup or timeout.
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ret := lwp_park(tsp, 0, unsafe.Pointer(&_g_.m.waitsemacount), nil)
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if ret == _ETIMEDOUT {
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return -1
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}
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||||
}
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}
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//go:nosplit
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func semawakeup(mp *m) {
|
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atomic.Xadd(&mp.waitsemacount, 1)
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// From NetBSD's _lwp_unpark(2) manual:
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// "If the target LWP is not currently waiting, it will return
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// immediately upon the next call to _lwp_park()."
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ret := lwp_unpark(int32(mp.procid), unsafe.Pointer(&mp.waitsemacount))
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if ret != 0 && ret != _ESRCH {
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// semawakeup can be called on signal stack.
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systemstack(func() {
|
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print("thrwakeup addr=", &mp.waitsemacount, " sem=", mp.waitsemacount, " ret=", ret, "\n")
|
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})
|
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}
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}
|
||||
|
||||
// May run with m.p==nil, so write barriers are not allowed.
|
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//go:nowritebarrier
|
||||
func newosproc(mp *m, stk unsafe.Pointer) {
|
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if false {
|
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print("newosproc stk=", stk, " m=", mp, " g=", mp.g0, " id=", mp.id, " ostk=", &mp, "\n")
|
||||
}
|
||||
|
||||
var uc ucontextt
|
||||
getcontext(unsafe.Pointer(&uc))
|
||||
|
||||
uc.uc_flags = _UC_SIGMASK | _UC_CPU
|
||||
uc.uc_link = nil
|
||||
uc.uc_sigmask = sigset_all
|
||||
|
||||
lwp_mcontext_init(&uc.uc_mcontext, stk, mp, mp.g0, funcPC(netbsdMstart))
|
||||
|
||||
ret := lwp_create(unsafe.Pointer(&uc), 0, unsafe.Pointer(&mp.procid))
|
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if ret < 0 {
|
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print("runtime: failed to create new OS thread (have ", mcount()-1, " already; errno=", -ret, ")\n")
|
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throw("runtime.newosproc")
|
||||
}
|
||||
}
|
||||
|
||||
// netbsdMStart is the function call that starts executing a newly
|
||||
// created thread. On NetBSD, a new thread inherits the signal stack
|
||||
// of the creating thread. That confuses minit, so we remove that
|
||||
// signal stack here before calling the regular mstart. It's a bit
|
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// baroque to remove a signal stack here only to add one in minit, but
|
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// it's a simple change that keeps NetBSD working like other OS's.
|
||||
// At this point all signals are blocked, so there is no race.
|
||||
//go:nosplit
|
||||
func netbsdMstart() {
|
||||
signalstack(nil)
|
||||
mstart()
|
||||
}
|
||||
|
||||
func osinit() {
|
||||
ncpu = getncpu()
|
||||
}
|
||||
|
||||
var urandom_dev = []byte("/dev/urandom\x00")
|
||||
|
||||
//go:nosplit
|
||||
func getRandomData(r []byte) {
|
||||
fd := open(&urandom_dev[0], 0 /* O_RDONLY */, 0)
|
||||
n := read(fd, unsafe.Pointer(&r[0]), int32(len(r)))
|
||||
closefd(fd)
|
||||
extendRandom(r, int(n))
|
||||
}
|
||||
|
||||
func goenvs() {
|
||||
goenvs_unix()
|
||||
}
|
||||
|
||||
// Called to initialize a new m (including the bootstrap m).
|
||||
// Called on the parent thread (main thread in case of bootstrap), can allocate memory.
|
||||
func mpreinit(mp *m) {
|
||||
mp.gsignal = malg(32 * 1024)
|
||||
mp.gsignal.m = mp
|
||||
}
|
||||
|
||||
//go:nosplit
|
||||
func msigsave(mp *m) {
|
||||
sigprocmask(_SIG_SETMASK, nil, &mp.sigmask)
|
||||
}
|
||||
|
||||
//go:nosplit
|
||||
func msigrestore(sigmask sigset) {
|
||||
sigprocmask(_SIG_SETMASK, &sigmask, nil)
|
||||
}
|
||||
|
||||
//go:nosplit
|
||||
func sigblock() {
|
||||
sigprocmask(_SIG_SETMASK, &sigset_all, nil)
|
||||
}
|
||||
|
||||
// Called to initialize a new m (including the bootstrap m).
|
||||
// Called on the new thread, cannot allocate memory.
|
||||
func minit() {
|
||||
_g_ := getg()
|
||||
_g_.m.procid = uint64(lwp_self())
|
||||
|
||||
// Initialize signal handling.
|
||||
|
||||
// On NetBSD a thread created by pthread_create inherits the
|
||||
// signal stack of the creating thread. We always create a
|
||||
// new signal stack here, to avoid having two Go threads using
|
||||
// the same signal stack. This breaks the case of a thread
|
||||
// created in C that calls sigaltstack and then calls a Go
|
||||
// function, because we will lose track of the C code's
|
||||
// sigaltstack, but it's the best we can do.
|
||||
signalstack(&_g_.m.gsignal.stack)
|
||||
_g_.m.newSigstack = true
|
||||
|
||||
// restore signal mask from m.sigmask and unblock essential signals
|
||||
nmask := _g_.m.sigmask
|
||||
for i := range sigtable {
|
||||
if sigtable[i].flags&_SigUnblock != 0 {
|
||||
nmask.__bits[(i-1)/32] &^= 1 << ((uint32(i) - 1) & 31)
|
||||
}
|
||||
}
|
||||
sigprocmask(_SIG_SETMASK, &nmask, nil)
|
||||
}
|
||||
|
||||
// Called from dropm to undo the effect of an minit.
|
||||
//go:nosplit
|
||||
func unminit() {
|
||||
if getg().m.newSigstack {
|
||||
signalstack(nil)
|
||||
}
|
||||
}
|
||||
|
||||
func memlimit() uintptr {
|
||||
return 0
|
||||
}
|
||||
|
||||
func sigtramp()
|
||||
|
||||
type sigactiont struct {
|
||||
sa_sigaction uintptr
|
||||
sa_mask sigset
|
||||
sa_flags int32
|
||||
}
|
||||
|
||||
//go:nosplit
|
||||
//go:nowritebarrierrec
|
||||
func setsig(i int32, fn uintptr, restart bool) {
|
||||
var sa sigactiont
|
||||
sa.sa_flags = _SA_SIGINFO | _SA_ONSTACK
|
||||
if restart {
|
||||
sa.sa_flags |= _SA_RESTART
|
||||
}
|
||||
sa.sa_mask = sigset_all
|
||||
if fn == funcPC(sighandler) {
|
||||
fn = funcPC(sigtramp)
|
||||
}
|
||||
sa.sa_sigaction = fn
|
||||
sigaction(i, &sa, nil)
|
||||
}
|
||||
|
||||
//go:nosplit
|
||||
//go:nowritebarrierrec
|
||||
func setsigstack(i int32) {
|
||||
throw("setsigstack")
|
||||
}
|
||||
|
||||
//go:nosplit
|
||||
//go:nowritebarrierrec
|
||||
func getsig(i int32) uintptr {
|
||||
var sa sigactiont
|
||||
sigaction(i, nil, &sa)
|
||||
if sa.sa_sigaction == funcPC(sigtramp) {
|
||||
return funcPC(sighandler)
|
||||
}
|
||||
return sa.sa_sigaction
|
||||
}
|
||||
|
||||
//go:nosplit
|
||||
func signalstack(s *stack) {
|
||||
var st sigaltstackt
|
||||
if s == nil {
|
||||
st.ss_flags = _SS_DISABLE
|
||||
} else {
|
||||
st.ss_sp = s.lo
|
||||
st.ss_size = s.hi - s.lo
|
||||
st.ss_flags = 0
|
||||
}
|
||||
sigaltstack(&st, nil)
|
||||
}
|
||||
|
||||
//go:nosplit
|
||||
//go:nowritebarrierrec
|
||||
func updatesigmask(m sigmask) {
|
||||
var mask sigset
|
||||
copy(mask.__bits[:], m[:])
|
||||
sigprocmask(_SIG_SETMASK, &mask, nil)
|
||||
}
|
||||
|
||||
func unblocksig(sig int32) {
|
||||
var mask sigset
|
||||
mask.__bits[(sig-1)/32] |= 1 << ((uint32(sig) - 1) & 31)
|
||||
sigprocmask(_SIG_UNBLOCK, &mask, nil)
|
||||
}
|
|
@ -1,15 +0,0 @@
|
|||
// Copyright 2011 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
package runtime
|
||||
|
||||
const (
|
||||
_NSIG = 33
|
||||
_SI_USER = 0
|
||||
_SS_DISABLE = 4
|
||||
_RLIMIT_AS = 10
|
||||
_SIG_BLOCK = 1
|
||||
_SIG_UNBLOCK = 2
|
||||
_SIG_SETMASK = 3
|
||||
)
|
|
@ -1,25 +0,0 @@
|
|||
// Copyright 2015 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
// +build linux
|
||||
// +build mips64 mips64le
|
||||
|
||||
package runtime
|
||||
|
||||
const (
|
||||
_SS_DISABLE = 2
|
||||
_NSIG = 65
|
||||
_SI_USER = 0
|
||||
_SIG_BLOCK = 1
|
||||
_SIG_UNBLOCK = 2
|
||||
_SIG_SETMASK = 3
|
||||
_RLIMIT_AS = 6
|
||||
)
|
||||
|
||||
type sigset [2]uint64
|
||||
|
||||
type rlimit struct {
|
||||
rlim_cur uintptr
|
||||
rlim_max uintptr
|
||||
}
|
|
@ -1,18 +0,0 @@
|
|||
// Copyright 2010 The Go Authors. All rights reserved.
|
||||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
package runtime
|
||||
|
||||
const (
|
||||
_SS_DISABLE = 4
|
||||
_SIG_BLOCK = 1
|
||||
_SIG_UNBLOCK = 2
|
||||
_SIG_SETMASK = 3
|
||||
_NSIG = 33
|
||||
_SI_USER = 0
|
||||
|
||||
// From NetBSD's <sys/ucontext.h>
|
||||
_UC_SIGMASK = 0x01
|
||||
_UC_CPU = 0x04
|
||||
)
|
|
@ -6,6 +6,16 @@ package runtime
|
|||
|
||||
import "unsafe"
|
||||
|
||||
const (
|
||||
_NSIG = 33
|
||||
_SI_USER = 0
|
||||
_SS_DISABLE = 4
|
||||
_RLIMIT_AS = 10
|
||||
_SIG_BLOCK = 1
|
||||
_SIG_UNBLOCK = 2
|
||||
_SIG_SETMASK = 3
|
||||
)
|
||||
|
||||
type mOS struct{}
|
||||
|
||||
//go:noescape
|
||||
|
@ -41,3 +51,266 @@ func sys_umtx_wakeup(addr *uint32, val int32) int32
|
|||
func osyield()
|
||||
|
||||
const stackSystem = 0
|
||||
|
||||
// From DragonFly's <sys/sysctl.h>
|
||||
const (
|
||||
_CTL_HW = 6
|
||||
_HW_NCPU = 3
|
||||
)
|
||||
|
||||
var sigset_all = sigset{[4]uint32{^uint32(0), ^uint32(0), ^uint32(0), ^uint32(0)}}
|
||||
|
||||
func getncpu() int32 {
|
||||
mib := [2]uint32{_CTL_HW, _HW_NCPU}
|
||||
out := uint32(0)
|
||||
nout := unsafe.Sizeof(out)
|
||||
ret := sysctl(&mib[0], 2, (*byte)(unsafe.Pointer(&out)), &nout, nil, 0)
|
||||
if ret >= 0 {
|
||||
return int32(out)
|
||||
}
|
||||
return 1
|
||||
}
|
||||
|
||||
//go:nosplit
|
||||
func futexsleep(addr *uint32, val uint32, ns int64) {
|
||||
systemstack(func() {
|
||||
futexsleep1(addr, val, ns)
|
||||
})
|
||||
}
|
||||
|
||||
func futexsleep1(addr *uint32, val uint32, ns int64) {
|
||||
var timeout int32
|
||||
if ns >= 0 {
|
||||
// The timeout is specified in microseconds - ensure that we
|
||||
// do not end up dividing to zero, which would put us to sleep
|
||||
// indefinitely...
|
||||
timeout = timediv(ns, 1000, nil)
|
||||
if timeout == 0 {
|
||||
timeout = 1
|
||||
}
|
||||
}
|
||||
|
||||
// sys_umtx_sleep will return EWOULDBLOCK (EAGAIN) when the timeout
|
||||
// expires or EBUSY if the mutex value does not match.
|
||||
ret := sys_umtx_sleep(addr, int32(val), timeout)
|
||||
if ret >= 0 || ret == -_EINTR || ret == -_EAGAIN || ret == -_EBUSY {
|
||||
return
|
||||
}
|
||||
|
||||
print("umtx_sleep addr=", addr, " val=", val, " ret=", ret, "\n")
|
||||
*(*int32)(unsafe.Pointer(uintptr(0x1005))) = 0x1005
|
||||
}
|
||||
|
||||
//go:nosplit
|
||||
func futexwakeup(addr *uint32, cnt uint32) {
|
||||
ret := sys_umtx_wakeup(addr, int32(cnt))
|
||||
if ret >= 0 {
|
||||
return
|
||||
}
|
||||
|
||||
systemstack(func() {
|
||||
print("umtx_wake_addr=", addr, " ret=", ret, "\n")
|
||||
*(*int32)(unsafe.Pointer(uintptr(0x1006))) = 0x1006
|
||||
})
|
||||
}
|
||||
|
||||
func lwp_start(uintptr)
|
||||
|
||||
// May run with m.p==nil, so write barriers are not allowed.
|
||||
//go:nowritebarrier
|
||||
func newosproc(mp *m, stk unsafe.Pointer) {
|
||||
if false {
|
||||
print("newosproc stk=", stk, " m=", mp, " g=", mp.g0, " lwp_start=", funcPC(lwp_start), " id=", mp.id, " ostk=", &mp, "\n")
|
||||
}
|
||||
|
||||
var oset sigset
|
||||
sigprocmask(_SIG_SETMASK, &sigset_all, &oset)
|
||||
|
||||
params := lwpparams{
|
||||
start_func: funcPC(lwp_start),
|
||||
arg: unsafe.Pointer(mp),
|
||||
stack: uintptr(stk),
|
||||
tid1: unsafe.Pointer(&mp.procid),
|
||||
tid2: nil,
|
||||
}
|
||||
|
||||
lwp_create(¶ms)
|
||||
sigprocmask(_SIG_SETMASK, &oset, nil)
|
||||
}
|
||||
|
||||
func osinit() {
|
||||
ncpu = getncpu()
|
||||
}
|
||||
|
||||
var urandom_dev = []byte("/dev/urandom\x00")
|
||||
|
||||
//go:nosplit
|
||||
func getRandomData(r []byte) {
|
||||
fd := open(&urandom_dev[0], 0 /* O_RDONLY */, 0)
|
||||
n := read(fd, unsafe.Pointer(&r[0]), int32(len(r)))
|
||||
closefd(fd)
|
||||
extendRandom(r, int(n))
|
||||
}
|
||||
|
||||
func goenvs() {
|
||||
goenvs_unix()
|
||||
}
|
||||
|
||||
// Called to initialize a new m (including the bootstrap m).
|
||||
// Called on the parent thread (main thread in case of bootstrap), can allocate memory.
|
||||
func mpreinit(mp *m) {
|
||||
mp.gsignal = malg(32 * 1024)
|
||||
mp.gsignal.m = mp
|
||||
}
|
||||
|
||||
//go:nosplit
|
||||
func msigsave(mp *m) {
|
||||
sigprocmask(_SIG_SETMASK, nil, &mp.sigmask)
|
||||
}
|
||||
|
||||
//go:nosplit
|
||||
func msigrestore(sigmask sigset) {
|
||||
sigprocmask(_SIG_SETMASK, &sigmask, nil)
|
||||
}
|
||||
|
||||
//go:nosplit
|
||||
func sigblock() {
|
||||
sigprocmask(_SIG_SETMASK, &sigset_all, nil)
|
||||
}
|
||||
|
||||
// Called to initialize a new m (including the bootstrap m).
|
||||
// Called on the new thread, cannot allocate memory.
|
||||
func minit() {
|
||||
_g_ := getg()
|
||||
|
||||
// m.procid is a uint64, but lwp_start writes an int32. Fix it up.
|
||||
_g_.m.procid = uint64(*(*int32)(unsafe.Pointer(&_g_.m.procid)))
|
||||
|
||||
// Initialize signal handling.
|
||||
|
||||
// On DragonFly a thread created by pthread_create inherits
|
||||
// the signal stack of the creating thread. We always create
|
||||
// a new signal stack here, to avoid having two Go threads
|
||||
// using the same signal stack. This breaks the case of a
|
||||
// thread created in C that calls sigaltstack and then calls a
|
||||
// Go function, because we will lose track of the C code's
|
||||
// sigaltstack, but it's the best we can do.
|
||||
signalstack(&_g_.m.gsignal.stack)
|
||||
_g_.m.newSigstack = true
|
||||
|
||||
// restore signal mask from m.sigmask and unblock essential signals
|
||||
nmask := _g_.m.sigmask
|
||||
for i := range sigtable {
|
||||
if sigtable[i].flags&_SigUnblock != 0 {
|
||||
nmask.__bits[(i-1)/32] &^= 1 << ((uint32(i) - 1) & 31)
|
||||
}
|
||||
}
|
||||
sigprocmask(_SIG_SETMASK, &nmask, nil)
|
||||
}
|
||||
|
||||
// Called from dropm to undo the effect of an minit.
|
||||
//go:nosplit
|
||||
func unminit() {
|
||||
if getg().m.newSigstack {
|
||||
signalstack(nil)
|
||||
}
|
||||
}
|
||||
|
||||
func memlimit() uintptr {
|
||||
/*
|
||||
TODO: Convert to Go when something actually uses the result.
|
||||
|
||||
Rlimit rl;
|
||||
extern byte runtime·text[], runtime·end[];
|
||||
uintptr used;
|
||||
|
||||
if(runtime·getrlimit(RLIMIT_AS, &rl) != 0)
|
||||
return 0;
|
||||
if(rl.rlim_cur >= 0x7fffffff)
|
||||
return 0;
|
||||
|
||||
// Estimate our VM footprint excluding the heap.
|
||||
// Not an exact science: use size of binary plus
|
||||
// some room for thread stacks.
|
||||
used = runtime·end - runtime·text + (64<<20);
|
||||
if(used >= rl.rlim_cur)
|
||||
return 0;
|
||||
|
||||
// If there's not at least 16 MB left, we're probably
|
||||
// not going to be able to do much. Treat as no limit.
|
||||
rl.rlim_cur -= used;
|
||||
if(rl.rlim_cur < (16<<20))
|
||||
return 0;
|
||||
|
||||
return rl.rlim_cur - used;
|
||||
*/
|
||||
return 0
|
||||
}
|
||||
|
||||
func sigtramp()
|
||||
|
||||
type sigactiont struct {
|
||||
sa_sigaction uintptr
|
||||
sa_flags int32
|
||||
sa_mask sigset
|
||||
}
|
||||
|
||||
//go:nosplit
|
||||
//go:nowritebarrierrec
|
||||
func setsig(i int32, fn uintptr, restart bool) {
|
||||
var sa sigactiont
|
||||
sa.sa_flags = _SA_SIGINFO | _SA_ONSTACK
|
||||
if restart {
|
||||
sa.sa_flags |= _SA_RESTART
|
||||
}
|
||||
sa.sa_mask = sigset_all
|
||||
if fn == funcPC(sighandler) {
|
||||
fn = funcPC(sigtramp)
|
||||
}
|
||||
sa.sa_sigaction = fn
|
||||
sigaction(i, &sa, nil)
|
||||
}
|
||||
|
||||
//go:nosplit
|
||||
//go:nowritebarrierrec
|
||||
func setsigstack(i int32) {
|
||||
throw("setsigstack")
|
||||
}
|
||||
|
||||
//go:nosplit
|
||||
//go:nowritebarrierrec
|
||||
func getsig(i int32) uintptr {
|
||||
var sa sigactiont
|
||||
sigaction(i, nil, &sa)
|
||||
if sa.sa_sigaction == funcPC(sigtramp) {
|
||||
return funcPC(sighandler)
|
||||
}
|
||||
return sa.sa_sigaction
|
||||
}
|
||||
|
||||
//go:nosplit
|
||||
func signalstack(s *stack) {
|
||||
var st sigaltstackt
|
||||
if s == nil {
|
||||
st.ss_flags = _SS_DISABLE
|
||||
} else {
|
||||
st.ss_sp = s.lo
|
||||
st.ss_size = s.hi - s.lo
|
||||
st.ss_flags = 0
|
||||
}
|
||||
sigaltstack(&st, nil)
|
||||
}
|
||||
|
||||
//go:nosplit
|
||||
//go:nowritebarrierrec
|
||||
func updatesigmask(m sigmask) {
|
||||
var mask sigset
|
||||
copy(mask.__bits[:], m[:])
|
||||
sigprocmask(_SIG_SETMASK, &mask, nil)
|
||||
}
|
||||
|
||||
func unblocksig(sig int32) {
|
||||
var mask sigset
|
||||
mask.__bits[(sig-1)/32] |= 1 << ((uint32(sig) - 1) & 31)
|
||||
sigprocmask(_SIG_UNBLOCK, &mask, nil)
|
||||
}
|
||||
|
|
|
@ -28,3 +28,21 @@ type rlimit struct {
|
|||
rlim_cur uintptr
|
||||
rlim_max uintptr
|
||||
}
|
||||
|
||||
var sigset_all = sigset{^uint32(0), ^uint32(0)}
|
||||
|
||||
func sigaddset(mask *sigset, i int) {
|
||||
(*mask)[(i-1)/32] |= 1 << ((uint32(i) - 1) & 31)
|
||||
}
|
||||
|
||||
func sigdelset(mask *sigset, i int) {
|
||||
(*mask)[(i-1)/32] &^= 1 << ((uint32(i) - 1) & 31)
|
||||
}
|
||||
|
||||
func sigfillset(mask *uint64) {
|
||||
*mask = ^uint64(0)
|
||||
}
|
||||
|
||||
func sigcopyset(mask *sigset, m sigmask) {
|
||||
copy((*mask)[:], m[:])
|
||||
}
|
|
@ -2,8 +2,8 @@
|
|||
// Use of this source code is governed by a BSD-style
|
||||
// license that can be found in the LICENSE file.
|
||||
|
||||
// +build mips64 mips64le
|
||||
// +build linux
|
||||
// +build mips64 mips64le
|
||||
|
||||
package runtime
|
||||
|
||||
|
@ -16,3 +16,38 @@ func cputicks() int64 {
|
|||
// randomNumber provides better seeding of fastrand1.
|
||||
return nanotime() + int64(randomNumber)
|
||||
}
|
||||
|
||||
const (
|
||||
_SS_DISABLE = 2
|
||||
_NSIG = 65
|
||||
_SI_USER = 0
|
||||
_SIG_BLOCK = 1
|
||||
_SIG_UNBLOCK = 2
|
||||
_SIG_SETMASK = 3
|
||||
_RLIMIT_AS = 6
|
||||
)
|
||||
|
||||
type sigset [2]uint64
|
||||
|
||||
type rlimit struct {
|
||||
rlim_cur uintptr
|
||||
rlim_max uintptr
|
||||
}
|
||||
|
||||
var sigset_all = sigset{^uint64(0), ^uint64(0)}
|
||||
|
||||
func sigaddset(mask *sigset, i int) {
|
||||
(*mask)[(i-1)/64] |= 1 << ((uint32(i) - 1) & 63)
|
||||
}
|
||||
|
||||
func sigdelset(mask *sigset, i int) {
|
||||
(*mask)[(i-1)/64] &^= 1 << ((uint32(i) - 1) & 63)
|
||||
}
|
||||
|
||||
func sigfillset(mask *[2]uint64) {
|
||||
(*mask)[0], (*mask)[1] = ^uint64(0), ^uint64(0)
|
||||
}
|
||||
|
||||
func sigcopyset(mask *sigset, m sigmask) {
|
||||
(*mask)[0] = uint64(m[0]) | uint64(m[1])<<32
|
||||
}
|
||||
|
|
|
@ -4,7 +4,23 @@
|
|||
|
||||
package runtime
|
||||
|
||||
import "unsafe"
|
||||
import (
|
||||
"runtime/internal/atomic"
|
||||
"unsafe"
|
||||
)
|
||||
|
||||
const (
|
||||
_SS_DISABLE = 4
|
||||
_SIG_BLOCK = 1
|
||||
_SIG_UNBLOCK = 2
|
||||
_SIG_SETMASK = 3
|
||||
_NSIG = 33
|
||||
_SI_USER = 0
|
||||
|
||||
// From NetBSD's <sys/ucontext.h>
|
||||
_UC_SIGMASK = 0x01
|
||||
_UC_CPU = 0x04
|
||||
)
|
||||
|
||||
type mOS struct {
|
||||
waitsemacount uint32
|
||||
|
@ -45,3 +61,268 @@ func lwp_unpark(lwp int32, hint unsafe.Pointer) int32
|
|||
func lwp_self() int32
|
||||
|
||||
func osyield()
|
||||
|
||||
const (
|
||||
_ESRCH = 3
|
||||
_ETIMEDOUT = 60
|
||||
|
||||
// From NetBSD's <sys/time.h>
|
||||
_CLOCK_REALTIME = 0
|
||||
_CLOCK_VIRTUAL = 1
|
||||
_CLOCK_PROF = 2
|
||||
_CLOCK_MONOTONIC = 3
|
||||
)
|
||||
|
||||
var sigset_all = sigset{[4]uint32{^uint32(0), ^uint32(0), ^uint32(0), ^uint32(0)}}
|
||||
|
||||
// From NetBSD's <sys/sysctl.h>
|
||||
const (
|
||||
_CTL_HW = 6
|
||||
_HW_NCPU = 3
|
||||
)
|
||||
|
||||
func getncpu() int32 {
|
||||
mib := [2]uint32{_CTL_HW, _HW_NCPU}
|
||||
out := uint32(0)
|
||||
nout := unsafe.Sizeof(out)
|
||||
ret := sysctl(&mib[0], 2, (*byte)(unsafe.Pointer(&out)), &nout, nil, 0)
|
||||
if ret >= 0 {
|
||||
return int32(out)
|
||||
}
|
||||
return 1
|
||||
}
|
||||
|
||||
//go:nosplit
|
||||
func semacreate(mp *m) {
|
||||
}
|
||||
|
||||
//go:nosplit
|
||||
func semasleep(ns int64) int32 {
|
||||
_g_ := getg()
|
||||
|
||||
// Compute sleep deadline.
|
||||
var tsp *timespec
|
||||
if ns >= 0 {
|
||||
var ts timespec
|
||||
var nsec int32
|
||||
ns += nanotime()
|
||||
ts.set_sec(timediv(ns, 1000000000, &nsec))
|
||||
ts.set_nsec(nsec)
|
||||
tsp = &ts
|
||||
}
|
||||
|
||||
for {
|
||||
v := atomic.Load(&_g_.m.waitsemacount)
|
||||
if v > 0 {
|
||||
if atomic.Cas(&_g_.m.waitsemacount, v, v-1) {
|
||||
return 0 // semaphore acquired
|
||||
}
|
||||
continue
|
||||
}
|
||||
|
||||
// Sleep until unparked by semawakeup or timeout.
|
||||
ret := lwp_park(tsp, 0, unsafe.Pointer(&_g_.m.waitsemacount), nil)
|
||||
if ret == _ETIMEDOUT {
|
||||
return -1
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
//go:nosplit
|
||||
func semawakeup(mp *m) {
|
||||
atomic.Xadd(&mp.waitsemacount, 1)
|
||||
// From NetBSD's _lwp_unpark(2) manual:
|
||||
// "If the target LWP is not currently waiting, it will return
|
||||
// immediately upon the next call to _lwp_park()."
|
||||
ret := lwp_unpark(int32(mp.procid), unsafe.Pointer(&mp.waitsemacount))
|
||||
if ret != 0 && ret != _ESRCH {
|
||||
// semawakeup can be called on signal stack.
|
||||
systemstack(func() {
|
||||
print("thrwakeup addr=", &mp.waitsemacount, " sem=", mp.waitsemacount, " ret=", ret, "\n")
|
||||
})
|
||||
}
|
||||
}
|
||||
|
||||
// May run with m.p==nil, so write barriers are not allowed.
|
||||
//go:nowritebarrier
|
||||
func newosproc(mp *m, stk unsafe.Pointer) {
|
||||
if false {
|
||||
print("newosproc stk=", stk, " m=", mp, " g=", mp.g0, " id=", mp.id, " ostk=", &mp, "\n")
|
||||
}
|
||||
|
||||
var uc ucontextt
|
||||
getcontext(unsafe.Pointer(&uc))
|
||||
|
||||
uc.uc_flags = _UC_SIGMASK | _UC_CPU
|
||||
uc.uc_link = nil
|
||||
uc.uc_sigmask = sigset_all
|
||||
|
||||
lwp_mcontext_init(&uc.uc_mcontext, stk, mp, mp.g0, funcPC(netbsdMstart))
|
||||
|
||||
ret := lwp_create(unsafe.Pointer(&uc), 0, unsafe.Pointer(&mp.procid))
|
||||
if ret < 0 {
|
||||
print("runtime: failed to create new OS thread (have ", mcount()-1, " already; errno=", -ret, ")\n")
|
||||
throw("runtime.newosproc")
|
||||
}
|
||||
}
|
||||
|
||||
// netbsdMStart is the function call that starts executing a newly
|
||||
// created thread. On NetBSD, a new thread inherits the signal stack
|
||||
// of the creating thread. That confuses minit, so we remove that
|
||||
// signal stack here before calling the regular mstart. It's a bit
|
||||
// baroque to remove a signal stack here only to add one in minit, but
|
||||
// it's a simple change that keeps NetBSD working like other OS's.
|
||||
// At this point all signals are blocked, so there is no race.
|
||||
//go:nosplit
|
||||
func netbsdMstart() {
|
||||
signalstack(nil)
|
||||
mstart()
|
||||
}
|
||||
|
||||
func osinit() {
|
||||
ncpu = getncpu()
|
||||
}
|
||||
|
||||
var urandom_dev = []byte("/dev/urandom\x00")
|
||||
|
||||
//go:nosplit
|
||||
func getRandomData(r []byte) {
|
||||
fd := open(&urandom_dev[0], 0 /* O_RDONLY */, 0)
|
||||
n := read(fd, unsafe.Pointer(&r[0]), int32(len(r)))
|
||||
closefd(fd)
|
||||
extendRandom(r, int(n))
|
||||
}
|
||||
|
||||
func goenvs() {
|
||||
goenvs_unix()
|
||||
}
|
||||
|
||||
// Called to initialize a new m (including the bootstrap m).
|
||||
// Called on the parent thread (main thread in case of bootstrap), can allocate memory.
|
||||
func mpreinit(mp *m) {
|
||||
mp.gsignal = malg(32 * 1024)
|
||||
mp.gsignal.m = mp
|
||||
}
|
||||
|
||||
//go:nosplit
|
||||
func msigsave(mp *m) {
|
||||
sigprocmask(_SIG_SETMASK, nil, &mp.sigmask)
|
||||
}
|
||||
|
||||
//go:nosplit
|
||||
func msigrestore(sigmask sigset) {
|
||||
sigprocmask(_SIG_SETMASK, &sigmask, nil)
|
||||
}
|
||||
|
||||
//go:nosplit
|
||||
func sigblock() {
|
||||
sigprocmask(_SIG_SETMASK, &sigset_all, nil)
|
||||
}
|
||||
|
||||
// Called to initialize a new m (including the bootstrap m).
|
||||
// Called on the new thread, cannot allocate memory.
|
||||
func minit() {
|
||||
_g_ := getg()
|
||||
_g_.m.procid = uint64(lwp_self())
|
||||
|
||||
// Initialize signal handling.
|
||||
|
||||
// On NetBSD a thread created by pthread_create inherits the
|
||||
// signal stack of the creating thread. We always create a
|
||||
// new signal stack here, to avoid having two Go threads using
|
||||
// the same signal stack. This breaks the case of a thread
|
||||
// created in C that calls sigaltstack and then calls a Go
|
||||
// function, because we will lose track of the C code's
|
||||
// sigaltstack, but it's the best we can do.
|
||||
signalstack(&_g_.m.gsignal.stack)
|
||||
_g_.m.newSigstack = true
|
||||
|
||||
// restore signal mask from m.sigmask and unblock essential signals
|
||||
nmask := _g_.m.sigmask
|
||||
for i := range sigtable {
|
||||
if sigtable[i].flags&_SigUnblock != 0 {
|
||||
nmask.__bits[(i-1)/32] &^= 1 << ((uint32(i) - 1) & 31)
|
||||
}
|
||||
}
|
||||
sigprocmask(_SIG_SETMASK, &nmask, nil)
|
||||
}
|
||||
|
||||
// Called from dropm to undo the effect of an minit.
|
||||
//go:nosplit
|
||||
func unminit() {
|
||||
if getg().m.newSigstack {
|
||||
signalstack(nil)
|
||||
}
|
||||
}
|
||||
|
||||
func memlimit() uintptr {
|
||||
return 0
|
||||
}
|
||||
|
||||
func sigtramp()
|
||||
|
||||
type sigactiont struct {
|
||||
sa_sigaction uintptr
|
||||
sa_mask sigset
|
||||
sa_flags int32
|
||||
}
|
||||
|
||||
//go:nosplit
|
||||
//go:nowritebarrierrec
|
||||
func setsig(i int32, fn uintptr, restart bool) {
|
||||
var sa sigactiont
|
||||
sa.sa_flags = _SA_SIGINFO | _SA_ONSTACK
|
||||
if restart {
|
||||
sa.sa_flags |= _SA_RESTART
|
||||
}
|
||||
sa.sa_mask = sigset_all
|
||||
if fn == funcPC(sighandler) {
|
||||
fn = funcPC(sigtramp)
|
||||
}
|
||||
sa.sa_sigaction = fn
|
||||
sigaction(i, &sa, nil)
|
||||
}
|
||||
|
||||
//go:nosplit
|
||||
//go:nowritebarrierrec
|
||||
func setsigstack(i int32) {
|
||||
throw("setsigstack")
|
||||
}
|
||||
|
||||
//go:nosplit
|
||||
//go:nowritebarrierrec
|
||||
func getsig(i int32) uintptr {
|
||||
var sa sigactiont
|
||||
sigaction(i, nil, &sa)
|
||||
if sa.sa_sigaction == funcPC(sigtramp) {
|
||||
return funcPC(sighandler)
|
||||
}
|
||||
return sa.sa_sigaction
|
||||
}
|
||||
|
||||
//go:nosplit
|
||||
func signalstack(s *stack) {
|
||||
var st sigaltstackt
|
||||
if s == nil {
|
||||
st.ss_flags = _SS_DISABLE
|
||||
} else {
|
||||
st.ss_sp = s.lo
|
||||
st.ss_size = s.hi - s.lo
|
||||
st.ss_flags = 0
|
||||
}
|
||||
sigaltstack(&st, nil)
|
||||
}
|
||||
|
||||
//go:nosplit
|
||||
//go:nowritebarrierrec
|
||||
func updatesigmask(m sigmask) {
|
||||
var mask sigset
|
||||
copy(mask.__bits[:], m[:])
|
||||
sigprocmask(_SIG_SETMASK, &mask, nil)
|
||||
}
|
||||
|
||||
func unblocksig(sig int32) {
|
||||
var mask sigset
|
||||
mask.__bits[(sig-1)/32] |= 1 << ((uint32(sig) - 1) & 31)
|
||||
sigprocmask(_SIG_UNBLOCK, &mask, nil)
|
||||
}
|
||||
|
|
Loading…
Reference in a new issue