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cmd/cgo: fix unaligned arguments typedmemmove crash on iOS #74868

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cmd/cgo: fix unaligned arguments typedmemmove crash on iOS #74868

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2 changes: 1 addition & 1 deletion src/cmd/cgo/out.go
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Original file line number Diff line number Diff line change
Expand Up @@ -1051,7 +1051,7 @@ func (p *Package) writeExports(fgo2, fm, fgcc, fgcch io.Writer) {
// string.h for memset, and is also robust to C++
// types with constructors. Both GCC and LLVM optimize
// this into just zeroing _cgo_a.
fmt.Fprintf(fgcc, "\ttypedef %s %v _cgo_argtype;\n", ctype.String(), p.packedAttribute())
fmt.Fprintf(fgcc, "\ttypedef %s %v __attribute__((aligned(%d))) _cgo_argtype;\n", ctype.String(), p.packedAttribute(), p.PtrSize)
fmt.Fprintf(fgcc, "\tstatic _cgo_argtype _cgo_zero;\n")
fmt.Fprintf(fgcc, "\t_cgo_argtype _cgo_a = _cgo_zero;\n")
if gccResult != "void" && (len(fntype.Results.List) > 1 || len(fntype.Results.List[0].Names) > 1) {
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