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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 package main
import "reflect" import (
"reflect"
"unsafe"
)
func main() { func main() {
callFunc() callFunc()
@@ -56,6 +59,11 @@ type I interface {
Add(n int) int Add(n int) int
} }
type abi struct {
typ unsafe.Pointer
data unsafe.Pointer
}
func callMethod() { func callMethod() {
t := &T{1} t := &T{1}
v := reflect.ValueOf(t) v := reflect.ValueOf(t)
@@ -63,11 +71,15 @@ func callMethod() {
println("method", fn.Kind(), fn.Type().String()) println("method", fn.Kind(), fn.Type().String())
r := fn.Call([]reflect.Value{reflect.ValueOf(100)}) r := fn.Call([]reflect.Value{reflect.ValueOf(100)})
println(r[0].Int()) println(r[0].Int())
//TODO type assert
// ifn, ok := fn.Interface().(func(int) int) // ifn, ok := fn.Interface().(func(int) int)
// if !ok { // if !ok {
// panic("error") // panic("error")
// } // }
// ifn(1) // ifn(1)
v2 := reflect.ValueOf(fn.Interface())
r2 := v2.Call([]reflect.Value{reflect.ValueOf(100)})
println(r2[0].Int())
} }
func callIMethod() { func callIMethod() {
@@ -77,9 +89,13 @@ func callIMethod() {
println("imethod", fn.Kind(), fn.Type().String()) println("imethod", fn.Kind(), fn.Type().String())
r := fn.Call([]reflect.Value{reflect.ValueOf(100)}) r := fn.Call([]reflect.Value{reflect.ValueOf(100)})
println(r[0].Int()) println(r[0].Int())
//TODO type assert
// ifn, ok := fn.Interface().(func(int) int) // ifn, ok := fn.Interface().(func(int) int)
// if !ok { // if !ok {
// panic("error") // panic("error")
// } // }
// ifn(1) // 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) %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.PrintInt"(i64 %55)
call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 10) 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 ret void
} }
@@ -521,6 +552,37 @@ _llgo_0:
%45 = call i64 @reflect.Value.Int(%reflect.Value %44) %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.PrintInt"(i64 %45)
call void @"github.com/goplus/llgo/internal/runtime.PrintByte"(i8 10) 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 ret void
} }

70
internal/lib/reflect/makefunc.go
View File

@@ -22,6 +22,13 @@
package reflect package reflect
import (
"unsafe"
"github.com/goplus/llgo/internal/abi"
"github.com/goplus/llgo/internal/runtime"
)
/* /*
import ( import (
"unsafe" "unsafe"
@@ -111,42 +118,37 @@ type methodValue struct {
// reflect can tell, but the true func representation can be handled // reflect can tell, but the true func representation can be handled
// by code like Convert and Interface and Assign. // by code like Convert and Interface and Assign.
func makeMethodValue(op string, v Value) Value { func makeMethodValue(op string, v Value) Value {
/* if v.flag&flagMethod == 0 {
if v.flag&flagMethod == 0 { panic("reflect: internal error: invalid use of makeMethodValue")
panic("reflect: internal error: invalid use of makeMethodValue") }
}
// Ignoring the flagMethod bit, v describes the receiver, not the method type. // Ignoring the flagMethod bit, v describes the receiver, not the method type.
fl := v.flag & (flagRO | flagAddr | flagIndir) fl := v.flag & (flagRO | flagAddr | flagIndir)
fl |= flag(v.typ().Kind()) fl |= flag(v.typ().Kind())
rcvr := Value{v.typ(), v.ptr, fl} rcvr := Value{v.typ(), v.ptr, fl}
// v.Type returns the actual type of the method value. // v.Type returns the actual type of the method value.
ftyp := (*funcType)(unsafe.Pointer(v.Type().(*rtype))) ftyp := *(*funcType)(unsafe.Pointer(v.Type().(*rtype)))
ptyp := rtypeOf(unsafe.Pointer(uintptr(0)))
code := methodValueCallCodePtr() ftyp.In = append([]*abi.Type{ptyp}, ftyp.In...)
typ := runtime.Struct("", 2*unsafe.Sizeof(0), abi.StructField{
// methodValue contains a stack map for use by the runtime Name_: "llgo_ctx",
_, _, abid := funcLayout(ftyp, nil) Typ: &ftyp.Type,
fv := &methodValue{ }, abi.StructField{
makeFuncCtxt: makeFuncCtxt{ Name_: "f",
fn: code, Typ: ptyp,
stack: abid.stackPtrs, Offset: unsafe.Sizeof(0),
argLen: abid.stackCallArgsSize, })
regPtrs: abid.inRegPtrs, typ.TFlag |= abi.TFlagClosure
}, _, _, fn := methodReceiver(op, rcvr, int(v.flag)>>flagMethodShift)
method: int(v.flag) >> flagMethodShift, fv := &struct {
rcvr: rcvr, fn unsafe.Pointer
} env unsafe.Pointer
}{fn, v.ptr}
// Cause panic if method is not appropriate. // Cause panic if method is not appropriate.
// The panic would still happen during the call if we omit this, // The panic would still happen during the call if we omit this,
// but we want Interface() and other operations to fail early. // but we want Interface() and other operations to fail early.
methodReceiver(op, fv.rcvr, fv.method) return Value{typ, unsafe.Pointer(fv), v.flag&flagRO | flagIndir | flag(Func)}
return Value{ftyp.Common(), unsafe.Pointer(fv), v.flag&flagRO | flag(Func)}
*/
panic("todo: reflect.makeMethodValue")
} }
/* /*