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internal/lib/reflect: makeMethodValue

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This commit is contained in:
visualfc
2024-11-05 16:06:18 +08:00
parent df2e34ac51
commit e6de8401bf
3 changed files with 115 additions and 35 deletions
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18
cl/_testgo/reflect/in.go
View File

@@ -1,6 +1,9 @@
package main
import "reflect"
import (
"reflect"
"unsafe"
)
func main() {
callFunc()
@@ -56,6 +59,11 @@ type I interface {
Add(n int) int
}
type abi struct {
typ unsafe.Pointer
data unsafe.Pointer
}
func callMethod() {
t := &T{1}
v := reflect.ValueOf(t)
@@ -63,11 +71,15 @@ func callMethod() {
println("method", fn.Kind(), fn.Type().String())
r := fn.Call([]reflect.Value{reflect.ValueOf(100)})
println(r[0].Int())
//TODO type assert
// ifn, ok := fn.Interface().(func(int) int)
// if !ok {
// panic("error")
// }
// ifn(1)
v2 := reflect.ValueOf(fn.Interface())
r2 := v2.Call([]reflect.Value{reflect.ValueOf(100)})
println(r2[0].Int())
}
func callIMethod() {
@@ -77,9 +89,13 @@ func callIMethod() {
println("imethod", fn.Kind(), fn.Type().String())
r := fn.Call([]reflect.Value{reflect.ValueOf(100)})
println(r[0].Int())
//TODO type assert
// ifn, ok := fn.Interface().(func(int) int)
// if !ok {
// panic("error")
// }
// ifn(1)
v2 := reflect.ValueOf(fn.Interface())
r2 := v2.Call([]reflect.Value{reflect.ValueOf(100)})
println(r2[0].Int())
}

62
cl/_testgo/reflect/out.ll
View File

@@ -448,6 +448,37 @@ _llgo_0:
%55 = call i64 @reflect.Value.Int(%reflect.Value %54)
call void @"github.com/goplus/llgo/internal/runtime.PrintInt"(i64 %55)
call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 10)
%56 = call %"github.com/goplus/llgo/internal/runtime.eface" @reflect.Value.Interface(%reflect.Value %18)
%57 = call %reflect.Value @reflect.ValueOf(%"github.com/goplus/llgo/internal/runtime.eface" %56)
%58 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocZ"(i64 24)
%59 = getelementptr inbounds %reflect.Value, ptr %58, i64 0
%60 = load ptr, ptr @_llgo_int, align 8
%61 = alloca %"github.com/goplus/llgo/internal/runtime.eface", align 8
%62 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %61, i32 0, i32 0
store ptr %60, ptr %62, align 8
%63 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %61, i32 0, i32 1
store ptr inttoptr (i64 100 to ptr), ptr %63, align 8
%64 = load %"github.com/goplus/llgo/internal/runtime.eface", ptr %61, align 8
%65 = call %reflect.Value @reflect.ValueOf(%"github.com/goplus/llgo/internal/runtime.eface" %64)
store %reflect.Value %65, ptr %59, align 8
%66 = alloca %"github.com/goplus/llgo/internal/runtime.Slice", align 8
%67 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %66, i32 0, i32 0
store ptr %58, ptr %67, align 8
%68 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %66, i32 0, i32 1
store i64 1, ptr %68, align 4
%69 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %66, i32 0, i32 2
store i64 1, ptr %69, align 4
%70 = load %"github.com/goplus/llgo/internal/runtime.Slice", ptr %66, align 8
%71 = call %"github.com/goplus/llgo/internal/runtime.Slice" @reflect.Value.Call(%reflect.Value %57, %"github.com/goplus/llgo/internal/runtime.Slice" %70)
%72 = extractvalue %"github.com/goplus/llgo/internal/runtime.Slice" %71, 0
%73 = extractvalue %"github.com/goplus/llgo/internal/runtime.Slice" %71, 1
%74 = icmp sge i64 0, %73
call void @"github.com/goplus/llgo/internal/runtime.AssertIndexRange"(i1 %74)
%75 = getelementptr inbounds %reflect.Value, ptr %72, i64 0
%76 = load %reflect.Value, ptr %75, align 8
%77 = call i64 @reflect.Value.Int(%reflect.Value %76)
call void @"github.com/goplus/llgo/internal/runtime.PrintInt"(i64 %77)
call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 10)
ret void
}
@@ -521,6 +552,37 @@ _llgo_0:
%45 = call i64 @reflect.Value.Int(%reflect.Value %44)
call void @"github.com/goplus/llgo/internal/runtime.PrintInt"(i64 %45)
call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 10)
%46 = call %"github.com/goplus/llgo/internal/runtime.eface" @reflect.Value.Interface(%reflect.Value %8)
%47 = call %reflect.Value @reflect.ValueOf(%"github.com/goplus/llgo/internal/runtime.eface" %46)
%48 = call ptr @"github.com/goplus/llgo/internal/runtime.AllocZ"(i64 24)
%49 = getelementptr inbounds %reflect.Value, ptr %48, i64 0
%50 = load ptr, ptr @_llgo_int, align 8
%51 = alloca %"github.com/goplus/llgo/internal/runtime.eface", align 8
%52 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %51, i32 0, i32 0
store ptr %50, ptr %52, align 8
%53 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.eface", ptr %51, i32 0, i32 1
store ptr inttoptr (i64 100 to ptr), ptr %53, align 8
%54 = load %"github.com/goplus/llgo/internal/runtime.eface", ptr %51, align 8
%55 = call %reflect.Value @reflect.ValueOf(%"github.com/goplus/llgo/internal/runtime.eface" %54)
store %reflect.Value %55, ptr %49, align 8
%56 = alloca %"github.com/goplus/llgo/internal/runtime.Slice", align 8
%57 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %56, i32 0, i32 0
store ptr %48, ptr %57, align 8
%58 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %56, i32 0, i32 1
store i64 1, ptr %58, align 4
%59 = getelementptr inbounds %"github.com/goplus/llgo/internal/runtime.Slice", ptr %56, i32 0, i32 2
store i64 1, ptr %59, align 4
%60 = load %"github.com/goplus/llgo/internal/runtime.Slice", ptr %56, align 8
%61 = call %"github.com/goplus/llgo/internal/runtime.Slice" @reflect.Value.Call(%reflect.Value %47, %"github.com/goplus/llgo/internal/runtime.Slice" %60)
%62 = extractvalue %"github.com/goplus/llgo/internal/runtime.Slice" %61, 0
%63 = extractvalue %"github.com/goplus/llgo/internal/runtime.Slice" %61, 1
%64 = icmp sge i64 0, %63
call void @"github.com/goplus/llgo/internal/runtime.AssertIndexRange"(i1 %64)
%65 = getelementptr inbounds %reflect.Value, ptr %62, i64 0
%66 = load %reflect.Value, ptr %65, align 8
%67 = call i64 @reflect.Value.Int(%reflect.Value %66)
call void @"github.com/goplus/llgo/internal/runtime.PrintInt"(i64 %67)
call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 10)
ret void
}

48
internal/lib/reflect/makefunc.go
View File

@@ -22,6 +22,13 @@
package reflect
import (
"unsafe"
"github.com/goplus/llgo/internal/abi"
"github.com/goplus/llgo/internal/runtime"
)
/*
import (
"unsafe"
@@ -111,7 +118,6 @@ type methodValue struct {
// reflect can tell, but the true func representation can be handled
// 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 makeMethodValue")
}
@@ -122,31 +128,27 @@ func makeMethodValue(op string, v Value) Value {
rcvr := Value{v.typ(), v.ptr, fl}
// v.Type returns the actual type of the method value.
ftyp := (*funcType)(unsafe.Pointer(v.Type().(*rtype)))
code := methodValueCallCodePtr()
// methodValue contains a stack map for use by the runtime
_, _, abid := funcLayout(ftyp, nil)
fv := &methodValue{
makeFuncCtxt: makeFuncCtxt{
fn: code,
stack: abid.stackPtrs,
argLen: abid.stackCallArgsSize,
regPtrs: abid.inRegPtrs,
},
method: int(v.flag) >> flagMethodShift,
rcvr: rcvr,
}
ftyp := *(*funcType)(unsafe.Pointer(v.Type().(*rtype)))
ptyp := rtypeOf(unsafe.Pointer(uintptr(0)))
ftyp.In = append([]*abi.Type{ptyp}, ftyp.In...)
typ := runtime.Struct("", 2*unsafe.Sizeof(0), abi.StructField{
Name_: "llgo_ctx",
Typ: &ftyp.Type,
}, abi.StructField{
Name_: "f",
Typ: ptyp,
Offset: unsafe.Sizeof(0),
})
typ.TFlag |= abi.TFlagClosure
_, _, fn := methodReceiver(op, rcvr, int(v.flag)>>flagMethodShift)
fv := &struct {
fn unsafe.Pointer
env unsafe.Pointer
}{fn, v.ptr}
// 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.
methodReceiver(op, fv.rcvr, fv.method)
return Value{ftyp.Common(), unsafe.Pointer(fv), v.flag&flagRO | flag(Func)}
*/
panic("todo: reflect.makeMethodValue")
return Value{typ, unsafe.Pointer(fv), v.flag&flagRO | flagIndir | flag(Func)}
}
/*