641dcd7c16
This change implements a new "scheduler" for WebAssembly using binaryen's asyncify transform. This is more reliable than the current "coroutines" transform, and works with non-Go code in the call stack. runtime (js/wasm): handle scheduler nesting If WASM calls into JS which calls back into WASM, it is possible for the scheduler to nest. The event from the callback must be handled immediately, so the task cannot simply be deferred to the outer scheduler. This creates a minimal scheduler loop which is used to handle such nesting.
53 строки
1,9 КиБ
LLVM
53 строки
1,9 КиБ
LLVM
; ModuleID = 'func.go'
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source_filename = "func.go"
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target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
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target triple = "wasm32-unknown-wasi"
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%runtime.funcValueWithSignature = type { i32, i8* }
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@"reflect/types.funcid:func:{basic:int}{}" = external constant i8
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@"main.someFunc$withSignature" = linkonce_odr constant %runtime.funcValueWithSignature { i32 ptrtoint (void (i32, i8*, i8*)* @main.someFunc to i32), i8* @"reflect/types.funcid:func:{basic:int}{}" }
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declare noalias nonnull i8* @runtime.alloc(i32, i8*, i8*, i8*)
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; Function Attrs: nounwind
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define hidden void @main.init(i8* %context, i8* %parentHandle) unnamed_addr #0 {
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entry:
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ret void
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}
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; Function Attrs: nounwind
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define hidden void @main.foo(i8* %callback.context, i32 %callback.funcptr, i8* %context, i8* %parentHandle) unnamed_addr #0 {
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entry:
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%0 = call i32 @runtime.getFuncPtr(i8* %callback.context, i32 %callback.funcptr, i8* nonnull @"reflect/types.funcid:func:{basic:int}{}", i8* undef, i8* null) #0
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%1 = icmp eq i32 %0, 0
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br i1 %1, label %fpcall.throw, label %fpcall.next
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fpcall.throw: ; preds = %entry
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call void @runtime.nilPanic(i8* undef, i8* null) #0
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unreachable
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fpcall.next: ; preds = %entry
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%2 = inttoptr i32 %0 to void (i32, i8*, i8*)*
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call void %2(i32 3, i8* %callback.context, i8* undef) #0
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ret void
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}
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declare i32 @runtime.getFuncPtr(i8*, i32, i8* dereferenceable_or_null(1), i8*, i8*)
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declare void @runtime.nilPanic(i8*, i8*)
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; Function Attrs: nounwind
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define hidden void @main.bar(i8* %context, i8* %parentHandle) unnamed_addr #0 {
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entry:
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call void @main.foo(i8* undef, i32 ptrtoint (%runtime.funcValueWithSignature* @"main.someFunc$withSignature" to i32), i8* undef, i8* undef)
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ret void
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}
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; Function Attrs: nounwind
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define hidden void @main.someFunc(i32 %arg0, i8* %context, i8* %parentHandle) unnamed_addr #0 {
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entry:
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ret void
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}
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attributes #0 = { nounwind }
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