Adding upstream version 1.21.8.upstream/1.21.8

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 166 insertions, 0 deletions

diff --git a/src/reflect/export_test.go b/src/reflect/export_test.go
new file mode 100644
index 0000000..2496c8d
--- /dev/null
+++ b/src/reflect/export_test.go
@@ -0,0 +1,166 @@
+// Copyright 2012 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package reflect
+
+import (
+	"internal/abi"
+	"internal/goarch"
+	"sync"
+	"unsafe"
+)
+
+// MakeRO returns a copy of v with the read-only flag set.
+func MakeRO(v Value) Value {
+	v.flag |= flagStickyRO
+	return v
+}
+
+// IsRO reports whether v's read-only flag is set.
+func IsRO(v Value) bool {
+	return v.flag&flagStickyRO != 0
+}
+
+var CallGC = &callGC
+
+// FuncLayout calls funcLayout and returns a subset of the results for testing.
+//
+// Bitmaps like stack, gc, inReg, and outReg are expanded such that each bit
+// takes up one byte, so that writing out test cases is a little clearer.
+// If ptrs is false, gc will be nil.
+func FuncLayout(t Type, rcvr Type) (frametype Type, argSize, retOffset uintptr, stack, gc, inReg, outReg []byte, ptrs bool) {
+	var ft *abi.Type
+	var abid abiDesc
+	if rcvr != nil {
+		ft, _, abid = funcLayout((*funcType)(unsafe.Pointer(t.common())), rcvr.common())
+	} else {
+		ft, _, abid = funcLayout((*funcType)(unsafe.Pointer(t.(*rtype))), nil)
+	}
+	// Extract size information.
+	argSize = abid.stackCallArgsSize
+	retOffset = abid.retOffset
+	frametype = toType(ft)
+
+	// Expand stack pointer bitmap into byte-map.
+	for i := uint32(0); i < abid.stackPtrs.n; i++ {
+		stack = append(stack, abid.stackPtrs.data[i/8]>>(i%8)&1)
+	}
+
+	// Expand register pointer bitmaps into byte-maps.
+	bool2byte := func(b bool) byte {
+		if b {
+			return 1
+		}
+		return 0
+	}
+	for i := 0; i < intArgRegs; i++ {
+		inReg = append(inReg, bool2byte(abid.inRegPtrs.Get(i)))
+		outReg = append(outReg, bool2byte(abid.outRegPtrs.Get(i)))
+	}
+	if ft.Kind_&kindGCProg != 0 {
+		panic("can't handle gc programs")
+	}
+
+	// Expand frame type's GC bitmap into byte-map.
+	ptrs = ft.PtrBytes != 0
+	if ptrs {
+		nptrs := ft.PtrBytes / goarch.PtrSize
+		gcdata := ft.GcSlice(0, (nptrs+7)/8)
+		for i := uintptr(0); i < nptrs; i++ {
+			gc = append(gc, gcdata[i/8]>>(i%8)&1)
+		}
+	}
+	return
+}
+
+func TypeLinks() []string {
+	var r []string
+	sections, offset := typelinks()
+	for i, offs := range offset {
+		rodata := sections[i]
+		for _, off := range offs {
+			typ := (*rtype)(resolveTypeOff(unsafe.Pointer(rodata), off))
+			r = append(r, typ.String())
+		}
+	}
+	return r
+}
+
+var GCBits = gcbits
+
+func gcbits(any) []byte // provided by runtime
+
+func MapBucketOf(x, y Type) Type {
+	return toType(bucketOf(x.common(), y.common()))
+}
+
+func CachedBucketOf(m Type) Type {
+	t := m.(*rtype)
+	if Kind(t.t.Kind_&kindMask) != Map {
+		panic("not map")
+	}
+	tt := (*mapType)(unsafe.Pointer(t))
+	return toType(tt.Bucket)
+}
+
+type EmbedWithUnexpMeth struct{}
+
+func (EmbedWithUnexpMeth) f() {}
+
+type pinUnexpMeth interface {
+	f()
+}
+
+var pinUnexpMethI = pinUnexpMeth(EmbedWithUnexpMeth{})
+
+func FirstMethodNameBytes(t Type) *byte {
+	_ = pinUnexpMethI
+
+	ut := t.uncommon()
+	if ut == nil {
+		panic("type has no methods")
+	}
+	m := ut.Methods()[0]
+	mname := t.(*rtype).nameOff(m.Name)
+	if *mname.DataChecked(0, "name flag field")&(1<<2) == 0 {
+		panic("method name does not have pkgPath *string")
+	}
+	return mname.Bytes
+}
+
+type OtherPkgFields struct {
+	OtherExported   int
+	otherUnexported int
+}
+
+func IsExported(t Type) bool {
+	typ := t.(*rtype)
+	n := typ.nameOff(typ.t.Str)
+	return n.IsExported()
+}
+
+func ResolveReflectName(s string) {
+	resolveReflectName(newName(s, "", false, false))
+}
+
+type Buffer struct {
+	buf []byte
+}
+
+func clearLayoutCache() {
+	layoutCache = sync.Map{}
+}
+
+func SetArgRegs(ints, floats int, floatSize uintptr) (oldInts, oldFloats int, oldFloatSize uintptr) {
+	oldInts = intArgRegs
+	oldFloats = floatArgRegs
+	oldFloatSize = floatRegSize
+	intArgRegs = ints
+	floatArgRegs = floats
+	floatRegSize = floatSize
+	clearLayoutCache()
+	return
+}
+
+var MethodValueCallCodePtr = methodValueCallCodePtr