1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
// Copyright 2018 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.
//go:build js && wasm
package runtime
import (
"runtime/internal/atomic"
"unsafe"
)
func exit(code int32)
func write1(fd uintptr, p unsafe.Pointer, n int32) int32 {
if fd > 2 {
throw("runtime.write to fd > 2 is unsupported")
}
wasmWrite(fd, p, n)
return n
}
// Stubs so tests can link correctly. These should never be called.
func open(name *byte, mode, perm int32) int32 { panic("not implemented") }
func closefd(fd int32) int32 { panic("not implemented") }
func read(fd int32, p unsafe.Pointer, n int32) int32 { panic("not implemented") }
//go:noescape
func wasmWrite(fd uintptr, p unsafe.Pointer, n int32)
func usleep(usec uint32)
//go:nosplit
func usleep_no_g(usec uint32) {
usleep(usec)
}
func exitThread(wait *atomic.Uint32)
type mOS struct{}
func osyield()
//go:nosplit
func osyield_no_g() {
osyield()
}
const _SIGSEGV = 0xb
func sigpanic() {
gp := getg()
if !canpanic() {
throw("unexpected signal during runtime execution")
}
// js only invokes the exception handler for memory faults.
gp.sig = _SIGSEGV
panicmem()
}
type sigset struct{}
// 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 sigsave(p *sigset) {
}
//go:nosplit
func msigrestore(sigmask sigset) {
}
//go:nosplit
//go:nowritebarrierrec
func clearSignalHandlers() {
}
//go:nosplit
func sigblock(exiting bool) {
}
// Called to initialize a new m (including the bootstrap m).
// Called on the new thread, cannot allocate memory.
func minit() {
}
// Called from dropm to undo the effect of an minit.
func unminit() {
}
// Called from exitm, but not from drop, to undo the effect of thread-owned
// resources in minit, semacreate, or elsewhere. Do not take locks after calling this.
func mdestroy(mp *m) {
}
func osinit() {
ncpu = 1
getg().m.procid = 2
physPageSize = 64 * 1024
}
// wasm has no signals
const _NSIG = 0
func signame(sig uint32) string {
return ""
}
func crash() {
*(*int32)(nil) = 0
}
func getRandomData(r []byte)
func goenvs() {
goenvs_unix()
}
func initsig(preinit bool) {
}
// May run with m.p==nil, so write barriers are not allowed.
//
//go:nowritebarrier
func newosproc(mp *m) {
throw("newosproc: not implemented")
}
func setProcessCPUProfiler(hz int32) {}
func setThreadCPUProfiler(hz int32) {}
func sigdisable(uint32) {}
func sigenable(uint32) {}
func sigignore(uint32) {}
//go:linkname os_sigpipe os.sigpipe
func os_sigpipe() {
throw("too many writes on closed pipe")
}
//go:nosplit
func cputicks() int64 {
// Currently cputicks() is used in blocking profiler and to seed runtime·fastrand().
// runtime·nanotime() is a poor approximation of CPU ticks that is enough for the profiler.
return nanotime()
}
//go:linkname syscall_now syscall.now
func syscall_now() (sec int64, nsec int32) {
sec, nsec, _ = time_now()
return
}
// gsignalStack is unused on js.
type gsignalStack struct{}
const preemptMSupported = false
func preemptM(mp *m) {
// No threads, so nothing to do.
}
|
