2017-03-19 22:45:54 +00:00
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package proc
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import (
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"bytes"
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"errors"
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"fmt"
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"go/ast"
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"go/constant"
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"go/token"
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"reflect"
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"strconv"
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"strings"
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"sync"
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"unsafe"
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2017-03-26 14:55:28 +00:00
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"github.com/derekparker/delve/dwarf/reader"
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2017-03-19 22:45:54 +00:00
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"golang.org/x/debug/dwarf"
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)
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// The kind field in runtime._type is a reflect.Kind value plus
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// some extra flags defined here.
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// See equivalent declaration in $GOROOT/src/reflect/type.go
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const (
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kindDirectIface = 1 << 5
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kindGCProg = 1 << 6 // Type.gc points to GC program
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kindNoPointers = 1 << 7
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kindMask = (1 << 5) - 1
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)
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// Value of tflag field in runtime._type.
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// See $GOROOT/reflect/type.go for a description of these flags.
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const (
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tflagUncommon = 1 << 0
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tflagExtraStar = 1 << 1
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tflagNamed = 1 << 2
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)
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// Do not call this function directly it isn't able to deal correctly with package paths
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func (dbp *Process) findType(name string) (dwarf.Type, error) {
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off, found := dbp.types[name]
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if !found {
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return nil, reader.TypeNotFoundErr
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}
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return dbp.dwarf.Type(off)
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}
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func (dbp *Process) pointerTo(typ dwarf.Type) dwarf.Type {
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return &dwarf.PtrType{dwarf.CommonType{int64(dbp.arch.PtrSize()), "*" + typ.Common().Name, reflect.Ptr, 0}, typ}
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}
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func (dbp *Process) findTypeExpr(expr ast.Expr) (dwarf.Type, error) {
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dbp.loadPackageMap()
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if lit, islit := expr.(*ast.BasicLit); islit && lit.Kind == token.STRING {
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// Allow users to specify type names verbatim as quoted
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// string. Useful as a catch-all workaround for cases where we don't
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// parse/serialize types correctly or can not resolve package paths.
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typn, _ := strconv.Unquote(lit.Value)
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return dbp.findType(typn)
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}
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dbp.expandPackagesInType(expr)
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if snode, ok := expr.(*ast.StarExpr); ok {
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// Pointer types only appear in the dwarf informations when
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// a pointer to the type is used in the target program, here
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// we create a pointer type on the fly so that the user can
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// specify a pointer to any variable used in the target program
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ptyp, err := dbp.findTypeExpr(snode.X)
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if err != nil {
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return nil, err
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}
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return dbp.pointerTo(ptyp), nil
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}
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return dbp.findType(exprToString(expr))
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}
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func complexType(typename string) bool {
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for _, ch := range typename {
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switch ch {
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case '*', '[', '<', '{', '(', ' ':
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return true
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}
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}
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return false
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}
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func (dbp *Process) loadPackageMap() error {
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if dbp.packageMap != nil {
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return nil
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}
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dbp.packageMap = map[string]string{}
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reader := dbp.DwarfReader()
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for entry, err := reader.Next(); entry != nil; entry, err = reader.Next() {
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if err != nil {
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return err
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}
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if entry.Tag != dwarf.TagTypedef && entry.Tag != dwarf.TagBaseType && entry.Tag != dwarf.TagClassType && entry.Tag != dwarf.TagStructType {
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continue
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}
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typename, ok := entry.Val(dwarf.AttrName).(string)
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if !ok || complexType(typename) {
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continue
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}
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dot := strings.LastIndex(typename, ".")
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if dot < 0 {
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continue
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}
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path := typename[:dot]
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slash := strings.LastIndex(path, "/")
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if slash < 0 || slash+1 >= len(path) {
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continue
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}
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name := path[slash+1:]
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dbp.packageMap[name] = path
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}
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return nil
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}
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2017-03-26 14:55:28 +00:00
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func (dbp *Process) loadTypeMap(wg *sync.WaitGroup) {
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2017-03-19 22:45:54 +00:00
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defer wg.Done()
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dbp.types = make(map[string]dwarf.Offset)
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reader := dbp.DwarfReader()
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2017-03-26 14:55:28 +00:00
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for entry, err := reader.NextType(); entry != nil; entry, err = reader.NextType() {
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2017-03-19 22:45:54 +00:00
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if err != nil {
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break
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}
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2017-03-26 14:55:28 +00:00
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name, ok := entry.Val(dwarf.AttrName).(string)
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if !ok {
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continue
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2017-03-19 22:45:54 +00:00
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}
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2017-03-26 14:55:28 +00:00
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if _, exists := dbp.types[name]; !exists {
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dbp.types[name] = entry.Offset
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2017-03-19 22:45:54 +00:00
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}
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}
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}
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func (dbp *Process) expandPackagesInType(expr ast.Expr) {
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switch e := expr.(type) {
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case *ast.ArrayType:
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dbp.expandPackagesInType(e.Elt)
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case *ast.ChanType:
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dbp.expandPackagesInType(e.Value)
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case *ast.FuncType:
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for i := range e.Params.List {
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dbp.expandPackagesInType(e.Params.List[i].Type)
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}
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if e.Results != nil {
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for i := range e.Results.List {
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dbp.expandPackagesInType(e.Results.List[i].Type)
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}
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}
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case *ast.MapType:
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dbp.expandPackagesInType(e.Key)
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dbp.expandPackagesInType(e.Value)
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case *ast.ParenExpr:
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dbp.expandPackagesInType(e.X)
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case *ast.SelectorExpr:
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switch x := e.X.(type) {
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case *ast.Ident:
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if path, ok := dbp.packageMap[x.Name]; ok {
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x.Name = path
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}
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default:
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dbp.expandPackagesInType(e.X)
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}
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case *ast.StarExpr:
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dbp.expandPackagesInType(e.X)
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default:
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// nothing to do
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}
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}
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type nameOfRuntimeTypeEntry struct {
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typename string
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kind int64
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}
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// Returns the type name of the type described in _type.
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// _type is a non-loaded Variable pointing to runtime._type struct in the target.
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// The returned string is in the format that's used in DWARF data
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func nameOfRuntimeType(_type *Variable) (typename string, kind int64, err error) {
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if e, ok := _type.dbp.nameOfRuntimeType[_type.Addr]; ok {
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return e.typename, e.kind, nil
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}
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var tflag int64
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2017-03-26 14:55:28 +00:00
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if tflagField := _type.toFieldNamed("tflag"); tflagField != nil && tflagField.Value != nil {
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2017-03-19 22:45:54 +00:00
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tflag, _ = constant.Int64Val(tflagField.Value)
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}
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2017-03-26 14:55:28 +00:00
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if kindField := _type.toFieldNamed("kind"); kindField != nil && kindField.Value != nil {
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2017-03-19 22:45:54 +00:00
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kind, _ = constant.Int64Val(kindField.Value)
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}
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// Named types are defined by a 'type' expression, everything else
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// (for example pointers to named types) are not considered named.
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if tflag&tflagNamed != 0 {
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typename, err = nameOfNamedRuntimeType(_type, kind, tflag)
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return typename, kind, err
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} else {
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typename, err = nameOfUnnamedRuntimeType(_type, kind, tflag)
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return typename, kind, err
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}
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_type.dbp.nameOfRuntimeType[_type.Addr] = nameOfRuntimeTypeEntry{typename, kind}
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return typename, kind, nil
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}
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// The layout of a runtime._type struct is as follows:
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//
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// <runtime._type><kind specific struct fields><runtime.uncommontype>
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//
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// with the 'uncommon type struct' being optional
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//
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// For named types first we extract the type name from the 'str'
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// field in the runtime._type struct.
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// Then we prepend the package path from the runtime.uncommontype
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// struct, when it exists.
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//
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// To find out the memory address of the runtime.uncommontype struct
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// we first cast the Variable pointing to the runtime._type struct
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// to a struct specific to the type's kind (for example, if the type
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// being described is a slice type the variable will be specialized
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// to a runtime.slicetype).
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func nameOfNamedRuntimeType(_type *Variable, kind, tflag int64) (typename string, err error) {
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var strOff int64
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2017-03-26 14:55:28 +00:00
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if strField := _type.toFieldNamed("str"); strField != nil && strField.Value != nil {
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2017-03-19 22:45:54 +00:00
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strOff, _ = constant.Int64Val(strField.Value)
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} else {
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return "", errors.New("could not find str field")
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}
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// The following code is adapted from reflect.(*rtype).Name.
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// For a description of how memory is organized for type names read
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// the comment to 'type name struct' in $GOROOT/src/reflect/type.go
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typename, _, _, err = _type.dbp.resolveNameOff(_type.Addr, uintptr(strOff))
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if err != nil {
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return "", err
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}
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if tflag&tflagExtraStar != 0 {
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typename = typename[1:]
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}
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if i := strings.Index(typename, "."); i >= 0 {
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typename = typename[i+1:]
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} else {
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return typename, nil
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}
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// The following code is adapted from reflect.(*rtype).PkgPath in
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// $GOROOT/src/reflect/type.go
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_type, err = specificRuntimeType(_type, kind)
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if err != nil {
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return "", err
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}
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if ut := uncommon(_type, tflag); ut != nil {
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2017-03-26 14:55:28 +00:00
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if pkgPathField := ut.toFieldNamed("pkgpath"); pkgPathField != nil && pkgPathField.Value != nil {
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2017-03-19 22:45:54 +00:00
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pkgPathOff, _ := constant.Int64Val(pkgPathField.Value)
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pkgPath, _, _, err := _type.dbp.resolveNameOff(_type.Addr, uintptr(pkgPathOff))
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if err != nil {
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return "", err
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}
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typename = pkgPath + "." + typename
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}
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}
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return typename, nil
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}
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func nameOfUnnamedRuntimeType(_type *Variable, kind, tflag int64) (string, error) {
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_type, err := specificRuntimeType(_type, kind)
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if err != nil {
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return "", err
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}
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// The types referred to here are defined in $GOROOT/src/runtime/type.go
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switch reflect.Kind(kind & kindMask) {
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case reflect.Array:
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var len int64
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2017-03-26 14:55:28 +00:00
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if lenField := _type.toFieldNamed("len"); lenField != nil && lenField.Value != nil {
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2017-03-19 22:45:54 +00:00
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len, _ = constant.Int64Val(lenField.Value)
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}
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elemname, err := fieldToType(_type, "elem")
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if err != nil {
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return "", err
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}
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return fmt.Sprintf("[%d]%s", len, elemname), nil
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case reflect.Chan:
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elemname, err := fieldToType(_type, "elem")
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if err != nil {
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return "", err
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}
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return "chan " + elemname, nil
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case reflect.Func:
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return nameOfFuncRuntimeType(_type, tflag, true)
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case reflect.Interface:
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return nameOfInterfaceRuntimeType(_type, kind, tflag)
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case reflect.Map:
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keyname, err := fieldToType(_type, "key")
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if err != nil {
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return "", err
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}
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elemname, err := fieldToType(_type, "elem")
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if err != nil {
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return "", err
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}
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return "map[" + keyname + "]" + elemname, nil
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case reflect.Ptr:
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elemname, err := fieldToType(_type, "elem")
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if err != nil {
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return "", err
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}
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return "*" + elemname, nil
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case reflect.Slice:
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elemname, err := fieldToType(_type, "elem")
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if err != nil {
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return "", err
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}
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return "[]" + elemname, nil
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case reflect.Struct:
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return nameOfStructRuntimeType(_type, kind, tflag)
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default:
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return nameOfNamedRuntimeType(_type, kind, tflag)
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}
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}
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// Returns the expression describing an anonymous function type.
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// A runtime.functype is followed by a runtime.uncommontype
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// (optional) and then by an array of pointers to runtime._type,
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// one for each input and output argument.
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func nameOfFuncRuntimeType(_type *Variable, tflag int64, anonymous bool) (string, error) {
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rtyp, err := _type.dbp.findType("runtime._type")
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if err != nil {
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return "", err
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}
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prtyp := _type.dbp.pointerTo(rtyp)
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uadd := _type.RealType.Common().ByteSize
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if ut := uncommon(_type, tflag); ut != nil {
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uadd += ut.RealType.Common().ByteSize
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}
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var inCount, outCount int64
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2017-03-26 14:55:28 +00:00
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if inCountField := _type.toFieldNamed("inCount"); inCountField != nil && inCountField.Value != nil {
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2017-03-19 22:45:54 +00:00
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inCount, _ = constant.Int64Val(inCountField.Value)
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}
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2017-03-26 14:55:28 +00:00
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if outCountField := _type.toFieldNamed("outCount"); outCountField != nil && outCountField.Value != nil {
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2017-03-19 22:45:54 +00:00
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outCount, _ = constant.Int64Val(outCountField.Value)
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// only the lowest 15 bits of outCount are used, rest are flags
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|
|
outCount = outCount & (1<<15 - 1)
|
|
|
|
}
|
|
|
|
|
|
|
|
cursortyp := _type.newVariable("", _type.Addr+uintptr(uadd), prtyp)
|
|
|
|
var buf bytes.Buffer
|
|
|
|
if anonymous {
|
|
|
|
buf.WriteString("func(")
|
|
|
|
} else {
|
|
|
|
buf.WriteString("(")
|
|
|
|
}
|
|
|
|
|
|
|
|
for i := int64(0); i < inCount; i++ {
|
|
|
|
argtype := cursortyp.maybeDereference()
|
|
|
|
cursortyp.Addr += uintptr(_type.dbp.arch.PtrSize())
|
|
|
|
argtypename, _, err := nameOfRuntimeType(argtype)
|
|
|
|
if err != nil {
|
|
|
|
return "", err
|
|
|
|
}
|
|
|
|
buf.WriteString(argtypename)
|
|
|
|
if i != inCount-1 {
|
|
|
|
buf.WriteString(", ")
|
|
|
|
}
|
|
|
|
}
|
|
|
|
buf.WriteString(")")
|
|
|
|
|
|
|
|
switch outCount {
|
|
|
|
case 0:
|
|
|
|
// nothing to do
|
|
|
|
case 1:
|
|
|
|
buf.WriteString(" ")
|
|
|
|
argtype := cursortyp.maybeDereference()
|
|
|
|
argtypename, _, err := nameOfRuntimeType(argtype)
|
|
|
|
if err != nil {
|
|
|
|
return "", err
|
|
|
|
}
|
|
|
|
buf.WriteString(argtypename)
|
|
|
|
default:
|
|
|
|
buf.WriteString(" (")
|
|
|
|
for i := int64(0); i < outCount; i++ {
|
|
|
|
argtype := cursortyp.maybeDereference()
|
|
|
|
cursortyp.Addr += uintptr(_type.dbp.arch.PtrSize())
|
|
|
|
argtypename, _, err := nameOfRuntimeType(argtype)
|
|
|
|
if err != nil {
|
|
|
|
return "", err
|
|
|
|
}
|
|
|
|
buf.WriteString(argtypename)
|
|
|
|
if i != inCount-1 {
|
|
|
|
buf.WriteString(", ")
|
|
|
|
}
|
|
|
|
}
|
|
|
|
buf.WriteString(")")
|
|
|
|
}
|
|
|
|
return buf.String(), nil
|
|
|
|
}
|
|
|
|
|
|
|
|
func nameOfInterfaceRuntimeType(_type *Variable, kind, tflag int64) (string, error) {
|
|
|
|
var buf bytes.Buffer
|
|
|
|
buf.WriteString("interface {")
|
|
|
|
|
|
|
|
methods, _ := _type.structMember("methods")
|
|
|
|
methods.loadArrayValues(0, LoadConfig{false, 1, 0, 4096, -1})
|
|
|
|
if methods.Unreadable != nil {
|
|
|
|
return "", nil
|
|
|
|
}
|
|
|
|
|
|
|
|
if len(methods.Children) == 0 {
|
|
|
|
buf.WriteString("}")
|
|
|
|
return buf.String(), nil
|
|
|
|
} else {
|
|
|
|
buf.WriteString(" ")
|
|
|
|
}
|
|
|
|
|
|
|
|
for i, im := range methods.Children {
|
|
|
|
var methodname, methodtype string
|
|
|
|
for i := range im.Children {
|
|
|
|
switch im.Children[i].Name {
|
|
|
|
case "name":
|
|
|
|
nameoff, _ := constant.Int64Val(im.Children[i].Value)
|
|
|
|
var err error
|
|
|
|
methodname, _, _, err = _type.dbp.resolveNameOff(_type.Addr, uintptr(nameoff))
|
|
|
|
if err != nil {
|
|
|
|
return "", err
|
|
|
|
}
|
|
|
|
|
|
|
|
case "typ":
|
|
|
|
typeoff, _ := constant.Int64Val(im.Children[i].Value)
|
|
|
|
typ, err := _type.dbp.resolveTypeOff(_type.Addr, uintptr(typeoff))
|
|
|
|
if err != nil {
|
|
|
|
return "", err
|
|
|
|
}
|
|
|
|
typ, err = specificRuntimeType(typ, int64(reflect.Func))
|
|
|
|
if err != nil {
|
|
|
|
return "", err
|
|
|
|
}
|
|
|
|
var tflag int64
|
2017-03-26 14:55:28 +00:00
|
|
|
if tflagField := typ.toFieldNamed("tflag"); tflagField != nil && tflagField.Value != nil {
|
2017-03-19 22:45:54 +00:00
|
|
|
tflag, _ = constant.Int64Val(tflagField.Value)
|
|
|
|
}
|
|
|
|
methodtype, err = nameOfFuncRuntimeType(typ, tflag, false)
|
|
|
|
if err != nil {
|
|
|
|
return "", err
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
buf.WriteString(methodname)
|
|
|
|
buf.WriteString(methodtype)
|
|
|
|
|
|
|
|
if i != len(methods.Children)-1 {
|
|
|
|
buf.WriteString("; ")
|
|
|
|
} else {
|
|
|
|
buf.WriteString(" }")
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return buf.String(), nil
|
|
|
|
}
|
|
|
|
|
|
|
|
func nameOfStructRuntimeType(_type *Variable, kind, tflag int64) (string, error) {
|
|
|
|
var buf bytes.Buffer
|
|
|
|
buf.WriteString("struct {")
|
|
|
|
|
|
|
|
fields, _ := _type.structMember("fields")
|
|
|
|
fields.loadArrayValues(0, LoadConfig{false, 1, 0, 4096, -1})
|
|
|
|
if fields.Unreadable != nil {
|
|
|
|
return "", fields.Unreadable
|
|
|
|
}
|
|
|
|
|
|
|
|
if len(fields.Children) == 0 {
|
|
|
|
buf.WriteString("}")
|
|
|
|
return buf.String(), nil
|
|
|
|
} else {
|
|
|
|
buf.WriteString(" ")
|
|
|
|
}
|
|
|
|
|
|
|
|
for i, field := range fields.Children {
|
|
|
|
var fieldname, fieldtypename string
|
|
|
|
var typeField *Variable
|
|
|
|
for i := range field.Children {
|
|
|
|
switch field.Children[i].Name {
|
|
|
|
case "name":
|
|
|
|
nameoff, _ := constant.Int64Val(field.Children[i].Value)
|
|
|
|
var err error
|
|
|
|
fieldname, _, _, err = _type.dbp.loadName(uintptr(nameoff))
|
|
|
|
if err != nil {
|
|
|
|
return "", err
|
|
|
|
}
|
|
|
|
|
|
|
|
case "typ":
|
|
|
|
typeField = field.Children[i].maybeDereference()
|
|
|
|
var err error
|
|
|
|
fieldtypename, _, err = nameOfRuntimeType(typeField)
|
|
|
|
if err != nil {
|
|
|
|
return "", err
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
// fieldname will be the empty string for anonymous fields
|
|
|
|
if fieldname != "" {
|
|
|
|
buf.WriteString(fieldname)
|
|
|
|
buf.WriteString(" ")
|
|
|
|
}
|
|
|
|
buf.WriteString(fieldtypename)
|
|
|
|
if i != len(fields.Children)-1 {
|
|
|
|
buf.WriteString("; ")
|
|
|
|
} else {
|
|
|
|
buf.WriteString(" }")
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
return buf.String(), nil
|
|
|
|
}
|
|
|
|
|
|
|
|
func fieldToType(_type *Variable, fieldName string) (string, error) {
|
|
|
|
typeField, err := _type.structMember(fieldName)
|
|
|
|
if err != nil {
|
|
|
|
return "", err
|
|
|
|
}
|
|
|
|
typeField = typeField.maybeDereference()
|
|
|
|
typename, _, err := nameOfRuntimeType(typeField)
|
|
|
|
return typename, err
|
|
|
|
}
|
|
|
|
|
|
|
|
func specificRuntimeType(_type *Variable, kind int64) (*Variable, error) {
|
|
|
|
rtyp, err := _type.dbp.findType("runtime._type")
|
|
|
|
if err != nil {
|
|
|
|
return nil, err
|
|
|
|
}
|
|
|
|
prtyp := _type.dbp.pointerTo(rtyp)
|
|
|
|
|
|
|
|
uintptrtyp, err := _type.dbp.findType("uintptr")
|
|
|
|
if err != nil {
|
|
|
|
return nil, err
|
|
|
|
}
|
|
|
|
|
|
|
|
uint32typ := &dwarf.UintType{dwarf.BasicType{CommonType: dwarf.CommonType{ByteSize: 4, Name: "uint32"}}}
|
|
|
|
uint16typ := &dwarf.UintType{dwarf.BasicType{CommonType: dwarf.CommonType{ByteSize: 2, Name: "uint16"}}}
|
|
|
|
|
|
|
|
newStructType := func(name string, sz uintptr) *dwarf.StructType {
|
|
|
|
return &dwarf.StructType{dwarf.CommonType{Name: name, ByteSize: int64(sz)}, name, "struct", nil, false}
|
|
|
|
}
|
|
|
|
|
|
|
|
appendField := func(typ *dwarf.StructType, name string, fieldtype dwarf.Type, off uintptr) {
|
|
|
|
typ.Field = append(typ.Field, &dwarf.StructField{Name: name, ByteOffset: int64(off), Type: fieldtype})
|
|
|
|
}
|
|
|
|
|
|
|
|
newSliceType := func(elemtype dwarf.Type) *dwarf.SliceType {
|
|
|
|
r := newStructType("[]"+elemtype.Common().Name, uintptr(3*uintptrtyp.Size()))
|
|
|
|
appendField(r, "array", _type.dbp.pointerTo(elemtype), 0)
|
|
|
|
appendField(r, "len", uintptrtyp, uintptr(uintptrtyp.Size()))
|
|
|
|
appendField(r, "cap", uintptrtyp, uintptr(2*uintptrtyp.Size()))
|
|
|
|
return &dwarf.SliceType{StructType: *r, ElemType: elemtype}
|
|
|
|
}
|
|
|
|
|
|
|
|
var typ *dwarf.StructType
|
|
|
|
|
|
|
|
type rtype struct {
|
|
|
|
size uintptr
|
|
|
|
ptrdata uintptr
|
|
|
|
hash uint32 // hash of type; avoids computation in hash tables
|
|
|
|
tflag uint8 // extra type information flags
|
|
|
|
align uint8 // alignment of variable with this type
|
|
|
|
fieldAlign uint8 // alignment of struct field with this type
|
|
|
|
kind uint8 // enumeration for C
|
|
|
|
alg *byte // algorithm table
|
|
|
|
gcdata *byte // garbage collection data
|
|
|
|
str int32 // string form
|
|
|
|
ptrToThis int32 // type for pointer to this type, may be zero
|
|
|
|
}
|
|
|
|
|
|
|
|
switch reflect.Kind(kind & kindMask) {
|
|
|
|
case reflect.Array:
|
|
|
|
// runtime.arraytype
|
|
|
|
var a struct {
|
|
|
|
rtype
|
|
|
|
elem *rtype // array element type
|
|
|
|
slice *rtype // slice type
|
|
|
|
len uintptr
|
|
|
|
}
|
|
|
|
typ = newStructType("runtime.arraytype", unsafe.Sizeof(a))
|
|
|
|
appendField(typ, "elem", prtyp, unsafe.Offsetof(a.elem))
|
|
|
|
appendField(typ, "len", uintptrtyp, unsafe.Offsetof(a.len))
|
|
|
|
case reflect.Chan:
|
|
|
|
// runtime.chantype
|
|
|
|
var a struct {
|
|
|
|
rtype
|
|
|
|
elem *rtype // channel element type
|
|
|
|
dir uintptr // channel direction (ChanDir)
|
|
|
|
}
|
|
|
|
typ = newStructType("runtime.chantype", unsafe.Sizeof(a))
|
|
|
|
appendField(typ, "elem", prtyp, unsafe.Offsetof(a.elem))
|
|
|
|
case reflect.Func:
|
|
|
|
// runtime.functype
|
|
|
|
var a struct {
|
|
|
|
rtype `reflect:"func"`
|
|
|
|
inCount uint16
|
|
|
|
outCount uint16 // top bit is set if last input parameter is ...
|
|
|
|
}
|
|
|
|
typ = newStructType("runtime.functype", unsafe.Sizeof(a))
|
|
|
|
appendField(typ, "inCount", uint16typ, unsafe.Offsetof(a.inCount))
|
|
|
|
appendField(typ, "outCount", uint16typ, unsafe.Offsetof(a.outCount))
|
|
|
|
case reflect.Interface:
|
|
|
|
// runtime.imethod
|
|
|
|
type imethod struct {
|
|
|
|
name uint32 // name of method
|
|
|
|
typ uint32 // .(*FuncType) underneath
|
|
|
|
}
|
|
|
|
|
|
|
|
var im imethod
|
|
|
|
|
|
|
|
// runtime.interfacetype
|
|
|
|
var a struct {
|
|
|
|
rtype `reflect:"interface"`
|
|
|
|
pkgPath *byte // import path
|
|
|
|
methods []imethod // sorted by hash
|
|
|
|
}
|
|
|
|
|
|
|
|
imethodtype := newStructType("runtime.imethod", unsafe.Sizeof(im))
|
|
|
|
appendField(imethodtype, "name", uint32typ, unsafe.Offsetof(im.name))
|
|
|
|
appendField(imethodtype, "typ", uint32typ, unsafe.Offsetof(im.typ))
|
|
|
|
typ = newStructType("runtime.interfacetype", unsafe.Sizeof(a))
|
|
|
|
appendField(typ, "methods", newSliceType(imethodtype), unsafe.Offsetof(a.methods))
|
|
|
|
case reflect.Map:
|
|
|
|
// runtime.maptype
|
|
|
|
var a struct {
|
|
|
|
rtype `reflect:"map"`
|
|
|
|
key *rtype // map key type
|
|
|
|
elem *rtype // map element (value) type
|
|
|
|
bucket *rtype // internal bucket structure
|
|
|
|
hmap *rtype // internal map header
|
|
|
|
keysize uint8 // size of key slot
|
|
|
|
indirectkey uint8 // store ptr to key instead of key itself
|
|
|
|
valuesize uint8 // size of value slot
|
|
|
|
indirectvalue uint8 // store ptr to value instead of value itself
|
|
|
|
bucketsize uint16 // size of bucket
|
|
|
|
reflexivekey bool // true if k==k for all keys
|
|
|
|
needkeyupdate bool // true if we need to update key on an overwrite
|
|
|
|
}
|
|
|
|
typ = newStructType("runtime.maptype", unsafe.Sizeof(a))
|
|
|
|
appendField(typ, "key", prtyp, unsafe.Offsetof(a.key))
|
|
|
|
appendField(typ, "elem", prtyp, unsafe.Offsetof(a.elem))
|
|
|
|
case reflect.Ptr:
|
|
|
|
// runtime.ptrtype
|
|
|
|
var a struct {
|
|
|
|
rtype `reflect:"ptr"`
|
|
|
|
elem *rtype // pointer element (pointed at) type
|
|
|
|
}
|
|
|
|
typ = newStructType("runtime.ptrtype", unsafe.Sizeof(a))
|
|
|
|
appendField(typ, "elem", prtyp, unsafe.Offsetof(a.elem))
|
|
|
|
case reflect.Slice:
|
|
|
|
// runtime.slicetype
|
|
|
|
var a struct {
|
|
|
|
rtype `reflect:"slice"`
|
|
|
|
elem *rtype // slice element type
|
|
|
|
}
|
|
|
|
|
|
|
|
typ = newStructType("runtime.slicetype", unsafe.Sizeof(a))
|
|
|
|
appendField(typ, "elem", prtyp, unsafe.Offsetof(a.elem))
|
|
|
|
case reflect.Struct:
|
|
|
|
// runtime.structtype
|
|
|
|
type structField struct {
|
|
|
|
name *byte // name is empty for embedded fields
|
|
|
|
typ *rtype // type of field
|
|
|
|
offset uintptr // byte offset of field within struct
|
|
|
|
}
|
|
|
|
|
|
|
|
var sf structField
|
|
|
|
|
|
|
|
var a struct {
|
|
|
|
rtype `reflect:"struct"`
|
|
|
|
pkgPath *byte
|
|
|
|
fields []structField // sorted by offset
|
|
|
|
}
|
|
|
|
|
|
|
|
fieldtype := newStructType("runtime.structtype", unsafe.Sizeof(sf))
|
|
|
|
appendField(fieldtype, "name", uintptrtyp, unsafe.Offsetof(sf.name))
|
|
|
|
appendField(fieldtype, "typ", prtyp, unsafe.Offsetof(sf.typ))
|
|
|
|
typ = newStructType("runtime.structtype", unsafe.Sizeof(a))
|
|
|
|
appendField(typ, "fields", newSliceType(fieldtype), unsafe.Offsetof(a.fields))
|
|
|
|
default:
|
|
|
|
return _type, nil
|
|
|
|
}
|
|
|
|
|
|
|
|
return _type.newVariable(_type.Name, _type.Addr, typ), nil
|
|
|
|
}
|
|
|
|
|
|
|
|
// See reflect.(*rtype).uncommon in $GOROOT/src/reflect/type.go
|
|
|
|
func uncommon(_type *Variable, tflag int64) *Variable {
|
|
|
|
if tflag&tflagUncommon == 0 {
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
|
|
|
|
typ, err := _type.dbp.findType("runtime.uncommontype")
|
|
|
|
if err != nil {
|
|
|
|
return nil
|
|
|
|
}
|
|
|
|
|
|
|
|
return _type.newVariable(_type.Name, _type.Addr+uintptr(_type.RealType.Size()), typ)
|
|
|
|
}
|