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cmd/compile: correct wasmexport result type checking

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The function resultsToWasmFields was originally for only
wasmimport. I adopted it for wasmexport as well, but forgot to
update a few places that were wasmimport-specific. This leads to
compiler panic if an invalid result type is passed, and also
unsafe.Pointer not actually supported. This CL fixes it.

Updates #65199.

Change-Id: I9bbd7154b70422504994840ff541c39ee596ee8f
Reviewed-on: https://go-review.googlesource.com/c/go/+/611315
Reviewed-by: Michael Knyszek <mknyszek@google.com>
Reviewed-by: Achille Roussel <achille.roussel@gmail.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
This commit is contained in:
Cherry Mui 2024-09-05 18:56:26 -04:00
parent 69827b5c8d
commit eb975601a0
2 changed files with 12 additions and 1 deletions
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4
src/cmd/compile/internal/ssagen/abi.go
View File

@ -451,8 +451,10 @@ func resultsToWasmFields(f *ir.Func, pragma string, result *abi.ABIParamResultIn
wfs[i].Type = obj.WasmF32
case types.TFLOAT64:
wfs[i].Type = obj.WasmF64
case types.TUNSAFEPTR:
wfs[i].Type = obj.WasmPtr
default:
base.ErrorfAt(f.Pos(), 0, "go:wasmimport %s %s: unsupported result type %s", f.WasmImport.Module, f.WasmImport.Name, t.String())
base.ErrorfAt(f.Pos(), 0, "%s: unsupported result type %s", pragma, t.String())
}
wfs[i].Offset = p.FrameOffset(result)
}

9
test/wasmexport2.go
View File

@ -24,6 +24,9 @@ func good2(MyInt32) {} // named type is ok
//go:wasmexport good3
func good3() int32 { return 0 } // one result is ok
//go:wasmexport good4
func good4() unsafe.Pointer { return nil } // one result is ok
//go:wasmexport bad1
func bad1(string) {} // ERROR "go:wasmexport: unsupported parameter type"
@ -54,5 +57,11 @@ func bad7(*S) {} // ERROR "go:wasmexport: unsupported parameter type"
//go:wasmexport bad8
func bad8([4]int32) {} // ERROR "go:wasmexport: unsupported parameter type"
//go:wasmexport bad9
func bad9() bool { return false } // ERROR "go:wasmexport: unsupported result type"
//go:wasmexport bad10
func bad10() *byte { return nil } // ERROR "go:wasmexport: unsupported result type"
//go:wasmexport toomanyresults
func toomanyresults() (int32, int32) { return 0, 0 } // ERROR "go:wasmexport: too many return values"