// or funcInfo() to get the funcInfo instead.

// A Func represents a Go function in the running binary.
type Func struct {
	opaque struct{} // unexported field to disallow conversions
}

func (f *Func) raw() *_func {
	return (*_func)(unsafe.Pointer(f))
}

func (f *Func) funcInfo() funcInfo {
	return f.raw().funcInfo()
}

func (f *_func) funcInfo() funcInfo {

	return int((*goobj.FuncInfo)(nil).ReadLocals(fi.data))
}

func (fi *FuncInfo) FuncID() abi.FuncID {
	return (*goobj.FuncInfo)(nil).ReadFuncID(fi.data)
}

func (fi *FuncInfo) FuncFlag() abi.FuncFlag {
	return (*goobj.FuncInfo)(nil).ReadFuncFlag(fi.data)
}

func (fi *FuncInfo) StartLine() int32 {
	return (*goobj.FuncInfo)(nil).ReadStartLine(fi.data)
}

	Targets []*Prog
}

// NewFuncInfo allocates and returns a FuncInfo for LSym.
func (s *LSym) NewFuncInfo() *FuncInfo {
	if s.Extra != nil {
		panic(fmt.Sprintf("invalid use of LSym - NewFuncInfo with Extra of type %T", *s.Extra))
	}
	f := new(FuncInfo)
	s.Extra = new(interface{})
	*s.Extra = f
	return f
}

// Func returns the *FuncInfo associated with s, or else nil.
func (s *LSym) Func() *FuncInfo {

// must not mutate pointer fields. Also, we keep the mutable state in a separate
// struct mostly to keep both structs SSA-able, which generates much better
// code.
type inlineUnwinder struct {
	f       funcInfo
	inlTree *[1 << 20]inlinedCall
}

// An inlineFrame is a position in an inlineUnwinder.
type inlineFrame struct {
	// pc is the PC giving the file/line metadata of the current frame. This is

			n++
		}
	}
	return n
}

// generate symbols for FuncInfo.
func genFuncInfoSyms(ctxt *Link) {
	infosyms := make([]*LSym, 0, len(ctxt.Text))
	var b bytes.Buffer
	symidx := int32(len(ctxt.defs))
	for _, s := range ctxt.Text {
		fn := s.Func()
		if fn == nil {
			continue
		}
		o := goobj.FuncInfo{
			Args:      uint32(fn.Args),
			Locals:    uint32(fn.Locals),

				n++
			}
			return n < len(dst)
		}
	)

outer:
	for _, retPC := range pcBuf[1:] {
		callPC := retPC - 1
		fi := findfunc(callPC)
		if !fi.valid() {
			// There is no funcInfo if callPC belongs to a C function. In this case
			// we still keep the pc, but don't attempt to expand inlined frames.
			if more := skipOrAdd(retPC); !more {
				break outer
			}
			continue
		}

	return (b >> (i % 8)) & 1
}

// bv describes the memory starting at address scanp.
// Adjust any pointers contained therein.
func adjustpointers(scanp unsafe.Pointer, bv *bitvector, adjinfo *adjustinfo, f funcInfo) {
	minp := adjinfo.old.lo
	maxp := adjinfo.old.hi
	delta := adjinfo.delta
	num := uintptr(bv.n)
	// If this frame might contain channel receive slots, use CAS

		// Go frames).
		if skip == 0 {
			n += copy(pcBuf[n:], cgoBuf[:cgoN])
		}
	}
	return n
}

// printArgs prints function arguments in traceback.
func printArgs(f funcInfo, argp unsafe.Pointer, pc uintptr) {
	p := (*[abi.TraceArgsMaxLen]uint8)(funcdata(f, abi.FUNCDATA_ArgInfo))
	if p == nil {
		return
	}

	liveInfo := funcdata(f, abi.FUNCDATA_ArgLiveInfo)

// 0-based.)

// Auxiliary symbols.
//
// Each symbol may (or may not) be associated with a number of auxiliary
// symbols. They are described in the Aux block. See Aux struct below.
// Currently a symbol's Gotype, FuncInfo, and associated DWARF symbols
// are auxiliary symbols.

const stringRefSize = 8 // two uint32s

type FingerprintType [8]byte

func (fp FingerprintType) IsZero() bool { return fp == FingerprintType{} }

			u.next()
		}

		p.lr = u.frame.lr
		p.sp = unsafe.Pointer(u.frame.sp)
		p.fp = unsafe.Pointer(u.frame.fp)

		ok = true
	})

	return
}

func (p *_panic) initOpenCodedDefers(fn funcInfo, varp unsafe.Pointer) bool {
	fd := funcdata(fn, abi.FUNCDATA_OpenCodedDeferInfo)
	if fd == nil {
		return false
	}

	if fn.deferreturn == 0 {
		throw("missing deferreturn")
	}