diff options
Diffstat (limited to 'src/pkg/runtime/stubs.go')
| -rw-r--r-- | src/pkg/runtime/stubs.go | 240 |
1 files changed, 0 insertions, 240 deletions
diff --git a/src/pkg/runtime/stubs.go b/src/pkg/runtime/stubs.go deleted file mode 100644 index 03f618e15..000000000 --- a/src/pkg/runtime/stubs.go +++ /dev/null @@ -1,240 +0,0 @@ -// Copyright 2014 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 - -import "unsafe" - -// Declarations for runtime services implemented in C or assembly. -// C implementations of these functions are in stubs.goc. -// Assembly implementations are in various files, see comments with -// each function. - -const ptrSize = 4 << (^uintptr(0) >> 63) // unsafe.Sizeof(uintptr(0)) but an ideal const -const regSize = 4 << (^uintreg(0) >> 63) // unsafe.Sizeof(uintreg(0)) but an ideal const - -// Should be a built-in for unsafe.Pointer? -//go:nosplit -func add(p unsafe.Pointer, x uintptr) unsafe.Pointer { - return unsafe.Pointer(uintptr(p) + x) -} - -// n must be a power of 2 -func roundup(p unsafe.Pointer, n uintptr) unsafe.Pointer { - delta := -uintptr(p) & (n - 1) - return unsafe.Pointer(uintptr(p) + delta) -} - -// in stubs.goc -func getg() *g -func acquirem() *m -func releasem(mp *m) -func gomcache() *mcache - -// mcall switches from the g to the g0 stack and invokes fn(g), -// where g is the goroutine that made the call. -// mcall saves g's current PC/SP in g->sched so that it can be restored later. -// It is up to fn to arrange for that later execution, typically by recording -// g in a data structure, causing something to call ready(g) later. -// mcall returns to the original goroutine g later, when g has been rescheduled. -// fn must not return at all; typically it ends by calling schedule, to let the m -// run other goroutines. -// -// mcall can only be called from g stacks (not g0, not gsignal). -//go:noescape -func mcall(fn func(*g)) - -// onM switches from the g to the g0 stack and invokes fn(). -// When fn returns, onM switches back to the g and returns, -// continuing execution on the g stack. -// If arguments must be passed to fn, they can be written to -// g->m->ptrarg (pointers) and g->m->scalararg (non-pointers) -// before the call and then consulted during fn. -// Similarly, fn can pass return values back in those locations. -// If fn is written in Go, it can be a closure, which avoids the need for -// ptrarg and scalararg entirely. -// After reading values out of ptrarg and scalararg it is conventional -// to zero them to avoid (memory or information) leaks. -// -// If onM is called from a g0 stack, it invokes fn and returns, -// without any stack switches. -// -// If onM is called from a gsignal stack, it crashes the program. -// The implication is that functions used in signal handlers must -// not use onM. -// -// NOTE(rsc): We could introduce a separate onMsignal that is -// like onM but if called from a gsignal stack would just run fn on -// that stack. The caller of onMsignal would be required to save the -// old values of ptrarg/scalararg and restore them when the call -// was finished, in case the signal interrupted an onM sequence -// in progress on the g or g0 stacks. Until there is a clear need for this, -// we just reject onM in signal handling contexts entirely. -// -//go:noescape -func onM(fn func()) - -func badonm() { - gothrow("onM called from signal goroutine") -} - -// C functions that run on the M stack. -// Call using mcall. -func gosched_m(*g) -func park_m(*g) -func recovery_m(*g) - -// More C functions that run on the M stack. -// Call using onM. -func mcacheRefill_m() -func largeAlloc_m() -func gc_m() -func scavenge_m() -func setFinalizer_m() -func removeFinalizer_m() -func markallocated_m() -func unrollgcprog_m() -func unrollgcproginplace_m() -func setgcpercent_m() -func setmaxthreads_m() -func ready_m() -func deferproc_m() -func goexit_m() -func startpanic_m() -func dopanic_m() - -// memclr clears n bytes starting at ptr. -// in memclr_*.s -//go:noescape -func memclr(ptr unsafe.Pointer, n uintptr) - -// memmove copies n bytes from "from" to "to". -// in memmove_*.s -//go:noescape -func memmove(to unsafe.Pointer, from unsafe.Pointer, n uintptr) - -const ( - concurrentSweep = true -) - -func gosched() -func starttheworld() -func stoptheworld() -func newextram() -func lockOSThread() -func unlockOSThread() - -// exported value for testing -var hashLoad = loadFactor - -// in asm_*.s -//go:noescape -func memeq(a, b unsafe.Pointer, size uintptr) bool - -// Code pointers for the nohash/noequal algorithms. Used for producing better error messages. -var nohashcode uintptr -var noequalcode uintptr - -// noescape hides a pointer from escape analysis. noescape is -// the identity function but escape analysis doesn't think the -// output depends on the input. noescape is inlined and currently -// compiles down to a single xor instruction. -// USE CAREFULLY! -//go:nosplit -func noescape(p unsafe.Pointer) unsafe.Pointer { - x := uintptr(p) - return unsafe.Pointer(x ^ 0) -} - -func entersyscall() -func entersyscallblock() -func exitsyscall() - -func cgocallback(fn, frame unsafe.Pointer, framesize uintptr) -func gogo(buf *gobuf) -func gosave(buf *gobuf) -func read(fd int32, p unsafe.Pointer, n int32) int32 -func close(fd int32) int32 -func mincore(addr unsafe.Pointer, n uintptr, dst *byte) int32 - -//go:noescape -func jmpdefer(fv *funcval, argp uintptr) -func exit1(code int32) -func asminit() -func setg(gg *g) -func exit(code int32) -func breakpoint() -func nanotime() int64 -func usleep(usec uint32) -func cputicks() int64 -func mmap(addr unsafe.Pointer, n uintptr, prot, flags, fd int32, off uint32) unsafe.Pointer -func munmap(addr unsafe.Pointer, n uintptr) -func madvise(addr unsafe.Pointer, n uintptr, flags int32) -func reflectcall(fn, arg unsafe.Pointer, n uint32, retoffset uint32) -func osyield() -func procyield(cycles uint32) -func cgocallback_gofunc(fv *funcval, frame unsafe.Pointer, framesize uintptr) -func readgogc() int32 -func purgecachedstats(c *mcache) -func gostringnocopy(b *byte) string -func goexit() - -//go:noescape -func write(fd uintptr, p unsafe.Pointer, n int32) int32 - -//go:noescape -func cas(ptr *uint32, old, new uint32) bool - -//go:noescape -func casp(ptr *unsafe.Pointer, old, new unsafe.Pointer) bool - -//go:noescape -func casuintptr(ptr *uintptr, old, new uintptr) bool - -//go:noescape -func atomicstoreuintptr(ptr *uintptr, new uintptr) - -//go:noescape -func atomicloaduintptr(ptr *uintptr) uintptr - -//go:noescape -func atomicloaduint(ptr *uint) uint - -//go:noescape -func setcallerpc(argp unsafe.Pointer, pc uintptr) - -//go:noescape -func getcallerpc(argp unsafe.Pointer) uintptr - -//go:noescape -func getcallersp(argp unsafe.Pointer) uintptr - -//go:noescape -func asmcgocall(fn, arg unsafe.Pointer) - -//go:noescape -func asmcgocall_errno(fn, arg unsafe.Pointer) int32 - -//go:noescape -func open(name *byte, mode, perm int32) int32 - -//go:noescape -func gotraceback(*bool) int32 - -const _NoArgs = ^uintptr(0) - -func newstack() -func newproc() -func lessstack() -func morestack() -func mstart() -func rt0_go() -func sigpanic() - -// return0 is a stub used to return 0 from deferproc. -// It is called at the very end of deferproc to signal -// the calling Go function that it should not jump -// to deferreturn. -// in asm_*.s -func return0() |