f50ad3585d
* initial commit for WASI support
* merge "time" package with wasi build tag
* override syscall package with wasi build tag
* create runtime_wasm_{js,wasi}.go files
* create syscall_wasi.go file
* create time/zoneinfo_wasi.go file as the replacement of zoneinfo_js.go
* add targets/wasi.json target
* set visbility hidden for runtime extern variables
Accodring to the WASI docs (https://github.com/WebAssembly/WASI/blob/master/design/application-abi.md#current-unstable-abi),
none of exports of WASI executable(Command) should no be accessed.
v0.19.0 of bytecodealliance/wasmetime, which is often refered to as the reference implementation of WASI,
does not accept any exports except functions and the only limited variables like "table", "memory".
* merge syscall_{baremetal,wasi}.go
* fix js target build
* mv wasi functions to syscall/wasi && implement sleepTicks
* WASI: set visibility hidden for globals variables
* mv back syscall/wasi/* to runtime package
* WASI: add test
* unexport wasi types
* WASI test: fix wasmtime path
* stop changing visibility of runtime.alloc
* use GOOS=linux, GOARCH=arm for wasi target
Signed-off-by: mathetake <takeshi@tetrate.io>
* WASI: fix build tags for os/runtime packages
Signed-off-by: mathetake <takeshi@tetrate.io>
* run WASI test only on Linux
Signed-off-by: mathetake <takeshi@tetrate.io>
* set InternalLinkage instead of changing visibility
Signed-off-by: mathetake <takeshi@tetrate.io>
59 строки
1,3 КиБ
Go
59 строки
1,3 КиБ
Go
// +build wasm,!wasi
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package runtime
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import "unsafe"
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type timeUnit float64 // time in milliseconds, just like Date.now() in JavaScript
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//export _start
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func _start() {
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// These need to be initialized early so that the heap can be initialized.
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heapStart = uintptr(unsafe.Pointer(&heapStartSymbol))
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heapEnd = uintptr(wasm_memory_size(0) * wasmPageSize)
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run()
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}
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var handleEvent func()
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//go:linkname setEventHandler syscall/js.setEventHandler
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func setEventHandler(fn func()) {
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handleEvent = fn
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}
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//export resume
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func resume() {
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go func() {
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handleEvent()
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}()
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scheduler()
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}
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//export go_scheduler
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func go_scheduler() {
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scheduler()
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}
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const asyncScheduler = true
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func ticksToNanoseconds(ticks timeUnit) int64 {
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// The JavaScript API works in float64 milliseconds, so convert to
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// nanoseconds first before converting to a timeUnit (which is a float64),
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// to avoid precision loss.
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return int64(ticks * 1e6)
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}
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func nanosecondsToTicks(ns int64) timeUnit {
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// The JavaScript API works in float64 milliseconds, so convert to timeUnit
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// (which is a float64) first before dividing, to avoid precision loss.
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return timeUnit(ns) / 1e6
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}
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// This function is called by the scheduler.
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// Schedule a call to runtime.scheduler, do not actually sleep.
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//export runtime.sleepTicks
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func sleepTicks(d timeUnit)
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//export runtime.ticks
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func ticks() timeUnit
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