diff options
Diffstat (limited to 'libgo/go/reflect/makefunc.go')
-rw-r--r-- | libgo/go/reflect/makefunc.go | 87 |
1 files changed, 29 insertions, 58 deletions
diff --git a/libgo/go/reflect/makefunc.go b/libgo/go/reflect/makefunc.go index 935a3d3be0..7ec277b864 100644 --- a/libgo/go/reflect/makefunc.go +++ b/libgo/go/reflect/makefunc.go @@ -7,16 +7,19 @@ package reflect import ( - "runtime" "unsafe" ) // makeFuncImpl is the closure value implementing the function // returned by MakeFunc. type makeFuncImpl struct { - code uintptr - typ *funcType - fn func([]Value) []Value + // These first three words are layed out like ffi_go_closure. + code uintptr + ffi_cif unsafe.Pointer + ffi_fun func(unsafe.Pointer, unsafe.Pointer) + + typ *funcType + fn func([]Value) []Value // For gccgo we use the same entry point for functions and for // method values. @@ -51,33 +54,20 @@ func MakeFunc(typ Type, fn func(args []Value) (results []Value)) Value { panic("reflect: call of MakeFunc with non-Func type") } - switch runtime.GOARCH { - case "amd64", "386": - default: - panic("reflect.MakeFunc not implemented for " + runtime.GOARCH) - } - t := typ.common() ftyp := (*funcType)(unsafe.Pointer(t)) - // Indirect Go func value (dummy) to obtain - // actual code address. (A Go func value is a pointer - // to a C function pointer. http://golang.org/s/go11func.) - dummy := makeFuncStub - code := **(**uintptr)(unsafe.Pointer(&dummy)) + impl := &makeFuncImpl{ + typ: ftyp, + fn: fn, + method: -1, + } - impl := &makeFuncImpl{code: code, typ: ftyp, fn: fn, method: -1} + makeFuncFFI(ftyp, unsafe.Pointer(impl)) - return Value{t, unsafe.Pointer(&impl), flag(Func<<flagKindShift) | flagIndir} + return Value{t, unsafe.Pointer(&impl), flag(Func) | flagIndir} } -// makeFuncStub is an assembly function that is the code half of -// the function returned from MakeFunc. It expects a *callReflectFunc -// as its context register, and its job is to invoke callReflect(ctxt, frame) -// where ctxt is the context register and frame is a pointer to the first -// word in the passed-in argument frame. -func makeFuncStub() - // makeMethodValue converts v from the rcvr+method index representation // of a method value to an actual method func value, which is // basically the receiver value with a special bit set, into a true @@ -87,42 +77,34 @@ func makeFuncStub() // by code like Convert and Interface and Assign. func makeMethodValue(op string, v Value) Value { if v.flag&flagMethod == 0 { - panic("reflect: internal error: invalid use of makePartialFunc") - } - - switch runtime.GOARCH { - case "amd64", "386": - default: - panic("reflect.makeMethodValue not implemented for " + runtime.GOARCH) + panic("reflect: internal error: invalid use of makeMethodValue") } // Ignoring the flagMethod bit, v describes the receiver, not the method type. fl := v.flag & (flagRO | flagAddr | flagIndir) - fl |= flag(v.typ.Kind()) << flagKindShift - rcvr := Value{v.typ, v.val, fl} + fl |= flag(v.typ.Kind()) + rcvr := Value{v.typ, v.ptr, fl} // v.Type returns the actual type of the method value. ft := v.Type().(*rtype) - // Indirect Go func value (dummy) to obtain - // actual code address. (A Go func value is a pointer - // to a C function pointer. http://golang.org/s/go11func.) - dummy := makeFuncStub - code := **(**uintptr)(unsafe.Pointer(&dummy)) - // Cause panic if method is not appropriate. // The panic would still happen during the call if we omit this, // but we want Interface() and other operations to fail early. - t, _, _ := methodReceiver(op, rcvr, int(v.flag)>>flagMethodShift) + _, t, _ := methodReceiver(op, rcvr, int(v.flag)>>flagMethodShift) + + ftyp := (*funcType)(unsafe.Pointer(t)) + method := int(v.flag) >> flagMethodShift fv := &makeFuncImpl{ - code: code, - typ: (*funcType)(unsafe.Pointer(t)), - method: int(v.flag) >> flagMethodShift, + typ: ftyp, + method: method, rcvr: rcvr, } - return Value{ft, unsafe.Pointer(&fv), v.flag&flagRO | flag(Func)<<flagKindShift | flagIndir} + makeFuncFFI(ftyp, unsafe.Pointer(fv)) + + return Value{ft, unsafe.Pointer(&fv), v.flag&flagRO | flag(Func) | flagIndir} } // makeValueMethod takes a method function and returns a function that @@ -137,29 +119,18 @@ func makeValueMethod(v Value) Value { panic("reflect: call of makeValueMethod with non-MethodFn") } - switch runtime.GOARCH { - case "amd64", "386": - default: - panic("reflect.makeValueMethod not implemented for " + runtime.GOARCH) - } - t := typ.common() ftyp := (*funcType)(unsafe.Pointer(t)) - // Indirect Go func value (dummy) to obtain - // actual code address. (A Go func value is a pointer - // to a C function pointer. http://golang.org/s/go11func.) - dummy := makeFuncStub - code := **(**uintptr)(unsafe.Pointer(&dummy)) - impl := &makeFuncImpl{ - code: code, typ: ftyp, method: -2, rcvr: v, } - return Value{t, unsafe.Pointer(&impl), flag(Func<<flagKindShift) | flagIndir} + makeFuncFFI(ftyp, unsafe.Pointer(impl)) + + return Value{t, unsafe.Pointer(&impl), v.flag&flagRO | flag(Func) | flagIndir} } // Call the function represented by a makeFuncImpl. |