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47 lines
1.4 KiB
Go
47 lines
1.4 KiB
Go
package wasi_snapshot_preview1
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import (
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"context"
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"github.com/tetratelabs/wazero/api"
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"github.com/tetratelabs/wazero/internal/wasip1"
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"github.com/tetratelabs/wazero/internal/wasm"
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"github.com/tetratelabs/wazero/sys"
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)
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// procExit is the WASI function named ProcExitName that terminates the
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// execution of the module with an exit code. The only successful exit code is
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// zero.
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//
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// # Parameters
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//
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// - exitCode: exit code.
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//
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// See https://github.com/WebAssembly/WASI/blob/main/phases/snapshot/docs.md#proc_exit
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var procExit = &wasm.HostFunc{
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ExportNames: []string{wasip1.ProcExitName},
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Name: wasip1.ProcExitName,
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ParamTypes: []api.ValueType{i32},
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ParamNames: []string{"rval"},
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Code: wasm.Code{
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GoFunc: api.GoModuleFunc(procExitFn),
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},
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}
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func procExitFn(ctx context.Context, mod api.Module, params []uint64) {
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exitCode := uint32(params[0])
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// Ensure other callers see the exit code.
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_ = mod.CloseWithExitCode(ctx, exitCode)
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// Prevent any code from executing after this function. For example, LLVM
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// inserts unreachable instructions after calls to exit.
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// See: https://github.com/emscripten-core/emscripten/issues/12322
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panic(sys.NewExitError(exitCode))
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}
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// procRaise is stubbed and will never be supported, as it was removed.
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//
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// See https://github.com/WebAssembly/WASI/pull/136
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var procRaise = stubFunction(wasip1.ProcRaiseName, []api.ValueType{i32}, "sig")
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