f8d9fa9e80
This upgrades all of libgo other than the runtime package to the Go 1.4 release. In Go 1.4 much of the runtime was rewritten into Go. Merging that code will take more time and will not change the API, so I'm putting it off for now. There are a few runtime changes anyhow, to accomodate other packages that rely on minor modifications to the runtime support. The compiler changes slightly to add a one-bit flag to each type descriptor kind that is stored directly in an interface, which for gccgo is currently only pointer types. Another one-bit flag (gcprog) is reserved because it is used by the gc compiler, but gccgo does not currently use it. There is another error check in the compiler since I ran across it during testing. gotools/: * Makefile.am (go_cmd_go_files): Sort entries. Add generate.go. * Makefile.in: Rebuild. From-SVN: r219627
153 lines
3.0 KiB
Go
153 lines
3.0 KiB
Go
// Copyright 2012 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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// Called from C. Returns the Go type *m.
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func gc_m_ptr(ret *interface{}) {
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*ret = (*m)(nil)
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}
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// Called from C. Returns the Go type *g.
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func gc_g_ptr(ret *interface{}) {
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*ret = (*g)(nil)
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}
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// Called from C. Returns the Go type *itab.
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func gc_itab_ptr(ret *interface{}) {
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*ret = (*itab)(nil)
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}
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func gc_unixnanotime(now *int64) {
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sec, nsec := timenow()
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*now = sec*1e9 + int64(nsec)
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}
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func freeOSMemory() {
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gogc(2) // force GC and do eager sweep
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onM(scavenge_m)
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}
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var poolcleanup func()
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func registerPoolCleanup(f func()) {
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poolcleanup = f
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}
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func clearpools() {
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// clear sync.Pools
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if poolcleanup != nil {
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poolcleanup()
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}
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for _, p := range &allp {
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if p == nil {
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break
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}
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// clear tinyalloc pool
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if c := p.mcache; c != nil {
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c.tiny = nil
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c.tinysize = 0
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// disconnect cached list before dropping it on the floor,
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// so that a dangling ref to one entry does not pin all of them.
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var sg, sgnext *sudog
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for sg = c.sudogcache; sg != nil; sg = sgnext {
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sgnext = sg.next
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sg.next = nil
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}
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c.sudogcache = nil
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}
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// clear defer pools
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for i := range p.deferpool {
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// disconnect cached list before dropping it on the floor,
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// so that a dangling ref to one entry does not pin all of them.
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var d, dlink *_defer
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for d = p.deferpool[i]; d != nil; d = dlink {
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dlink = d.link
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d.link = nil
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}
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p.deferpool[i] = nil
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}
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}
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}
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func gosweepone() uintptr
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func gosweepdone() bool
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func bgsweep() {
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getg().issystem = true
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for {
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for gosweepone() != ^uintptr(0) {
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sweep.nbgsweep++
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Gosched()
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}
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lock(&gclock)
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if !gosweepdone() {
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// This can happen if a GC runs between
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// gosweepone returning ^0 above
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// and the lock being acquired.
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unlock(&gclock)
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continue
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}
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sweep.parked = true
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goparkunlock(&gclock, "GC sweep wait")
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}
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}
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// NOTE: Really dst *unsafe.Pointer, src unsafe.Pointer,
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// but if we do that, Go inserts a write barrier on *dst = src.
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//go:nosplit
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func writebarrierptr(dst *uintptr, src uintptr) {
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*dst = src
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}
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//go:nosplit
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func writebarrierstring(dst *[2]uintptr, src [2]uintptr) {
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dst[0] = src[0]
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dst[1] = src[1]
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}
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//go:nosplit
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func writebarrierslice(dst *[3]uintptr, src [3]uintptr) {
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dst[0] = src[0]
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dst[1] = src[1]
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dst[2] = src[2]
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}
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//go:nosplit
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func writebarrieriface(dst *[2]uintptr, src [2]uintptr) {
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dst[0] = src[0]
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dst[1] = src[1]
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}
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//go:nosplit
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func writebarrierfat2(dst *[2]uintptr, _ *byte, src [2]uintptr) {
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dst[0] = src[0]
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dst[1] = src[1]
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}
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//go:nosplit
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func writebarrierfat3(dst *[3]uintptr, _ *byte, src [3]uintptr) {
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dst[0] = src[0]
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dst[1] = src[1]
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dst[2] = src[2]
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}
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//go:nosplit
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func writebarrierfat4(dst *[4]uintptr, _ *byte, src [4]uintptr) {
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dst[0] = src[0]
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dst[1] = src[1]
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dst[2] = src[2]
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dst[3] = src[3]
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}
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//go:nosplit
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func writebarrierfat(typ *_type, dst, src unsafe.Pointer) {
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memmove(dst, src, typ.size)
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}
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