New command 'types'

Lists all the types defined in the debugged program.

dwarf/reader/reader.go

@@ -143,11 +143,7 @@ func (reader *Reader) SeekToType(entry *dwarf.Entry, resolveTypedefs bool, resol
 	return nil, TypeNotFoundErr
 }
 
-// SeekToTypeNamed moves the reader to the type specified by the name.
+func (reader *Reader) NextType() (*dwarf.Entry, error) {
-// If the reader is set to a struct type the NextMemberVariable call
-// can be used to walk all member data.
-func (reader *Reader) SeekToTypeNamed(name string) (*dwarf.Entry, error) {
-	// Walk the types to the base
 	for entry, err := reader.Next(); entry != nil; entry, err = reader.Next() {
 		if err != nil {
 			return nil, err
@@ -155,9 +151,21 @@ func (reader *Reader) SeekToTypeNamed(name string) (*dwarf.Entry, error) {
 
 		switch entry.Tag {
 		case dwarf.TagArrayType, dwarf.TagBaseType, dwarf.TagClassType, dwarf.TagStructType, dwarf.TagUnionType, dwarf.TagConstType, dwarf.TagVolatileType, dwarf.TagRestrictType, dwarf.TagEnumerationType, dwarf.TagPointerType, dwarf.TagSubroutineType, dwarf.TagTypedef, dwarf.TagUnspecifiedType:
-			//ok
+			return entry, nil
-		default:
+		}
-			continue
+	}
+
+	return nil, nil
+}
+
+// SeekToTypeNamed moves the reader to the type specified by the name.
+// If the reader is set to a struct type the NextMemberVariable call
+// can be used to walk all member data.
+func (reader *Reader) SeekToTypeNamed(name string) (*dwarf.Entry, error) {
+	// Walk the types to the base
+	for entry, err := reader.NextType(); entry != nil; entry, err = reader.NextType() {
+		if err != nil {
+			return nil, err
 		}
 
 		n, ok := entry.Val(dwarf.AttrName).(string)

proc/proc.go

@@ -656,6 +656,25 @@ func (dbp *Process) Funcs() []gosym.Func {
 	return dbp.goSymTable.Funcs
 }
 
+// Types returns list of types present in the debugged program.
+func (dbp *Process) Types() ([]string, error) {
+	reader := dbp.DwarfReader()
+	types := []string{}
+	seen := map[string]struct{}{}
+	for entry, err := reader.NextType(); entry != nil; entry, err = reader.NextType() {
+		if err != nil {
+			return nil, err
+		}
+		if n, ok := entry.Val(dwarf.AttrName).(string); ok {
+			if _, isseen := seen[n]; !isseen {
+				seen[n] = struct{}{}
+				types = append(types, n)
+			}
+		}
+	}
+	return types, nil
+}
+
 // PCToLine converts an instruction address to a file/line/function.
 func (dbp *Process) PCToLine(pc uint64) (string, int, *gosym.Func) {
 	return dbp.goSymTable.PCToLine(pc)

service/client.go

@@ -69,6 +69,8 @@ type Client interface {
 	ListSources(filter string) ([]string, error)
 	// ListFunctions lists all functions in the process matching filter.
 	ListFunctions(filter string) ([]string, error)
+	// ListTypes lists all types in the process matching filter.
+	ListTypes(filter string) ([]string, error)
 	// ListLocals lists all local variables in scope.
 	ListLocalVariables(scope api.EvalScope) ([]api.Variable, error)
 	// ListFunctionArgs lists all arguments to the current function.

service/debugger/debugger.go

@@ -498,6 +498,30 @@ func (d *Debugger) Functions(filter string) ([]string, error) {
 	return regexFilterFuncs(filter, d.process.Funcs())
 }
 
+func (d *Debugger) Types(filter string) ([]string, error) {
+	d.processMutex.Lock()
+	defer d.processMutex.Unlock()
+
+	regex, err := regexp.Compile(filter)
+	if err != nil {
+		return nil, fmt.Errorf("invalid filter argument: %s", err.Error())
+	}
+
+	types, err := d.process.Types()
+	if err != nil {
+		return nil, err
+	}
+
+	r := make([]string, 0, len(types))
+	for _, typ := range types {
+		if regex.Match([]byte(typ)) {
+			r = append(r, typ)
+		}
+	}
+
+	return r, nil
+}
+
 func regexFilterFuncs(filter string, allFuncs []gosym.Func) ([]string, error) {
 	regex, err := regexp.Compile(filter)
 	if err != nil {

service/rpc/client.go

@@ -209,6 +209,12 @@ func (c *RPCClient) ListFunctions(filter string) ([]string, error) {
 	return funcs, err
 }
 
+func (c *RPCClient) ListTypes(filter string) ([]string, error) {
+	var types []string
+	err := c.call("ListTypes", filter, &types)
+	return types, err
+}
+
 func (c *RPCClient) ListPackageVariables(filter string) ([]api.Variable, error) {
 	var vars []api.Variable
 	err := c.call("ListPackageVars", filter, &vars)

service/rpc/server.go

@@ -345,6 +345,15 @@ func (s *RPCServer) ListFunctions(filter string, funcs *[]string) error {
 	return nil
 }
 
+func (s *RPCServer) ListTypes(filter string, types *[]string) error {
+	tps, err := s.debugger.Types(filter)
+	if err != nil {
+		return err
+	}
+	*types = tps
+	return nil
+}
+
 func (s *RPCServer) ListGoroutines(arg interface{}, goroutines *[]*api.Goroutine) error {
 	gs, err := s.debugger.Goroutines()
 	if err != nil {

service/test/integration_test.go

@@ -1089,3 +1089,29 @@ func TestIssue419(t *testing.T) {
 		assertNoError(state.Err, t, "Continue()")
 	})
 }
+
+func TestTypesCommand(t *testing.T) {
+	withTestClient("testvariables2", t, func(c service.Client) {
+		state := <-c.Continue()
+		assertNoError(state.Err, t, "Continue()")
+		types, err := c.ListTypes("")
+		assertNoError(err, t, "ListTypes()")
+
+		found := false
+		for i := range types {
+			if types[i] == "main.astruct" {
+				found = true
+				break
+			}
+		}
+		if !found {
+			t.Fatal("Type astruct not found in ListTypes output")
+		}
+
+		types, err = c.ListTypes("main.astruct")
+		assertNoError(err, t, "ListTypes(\"main.astruct\")")
+		if len(types) <= 0 {
+			t.Fatal("ListTypes(\"main.astruct\") did not return anything")
+		}
+	})
+}

terminal/command.go

@@ -75,6 +75,7 @@ func DebugCommands(client service.Client) *Commands {
 		{aliases: []string{"set"}, cmdFn: g0f0(setVar), helpMsg: "Changes the value of a variable."},
 		{aliases: []string{"sources"}, cmdFn: filterSortAndOutput(sources), helpMsg: "Print list of source files, optionally filtered by a regexp."},
 		{aliases: []string{"funcs"}, cmdFn: filterSortAndOutput(funcs), helpMsg: "Print list of functions, optionally filtered by a regexp."},
+		{aliases: []string{"types"}, cmdFn: filterSortAndOutput(types), helpMsg: "Print list of types, optionally filtered by a regexp."},
 		{aliases: []string{"args"}, cmdFn: filterSortAndOutput(g0f0filter(args)), helpMsg: "Print function arguments, optionally filtered by a regexp."},
 		{aliases: []string{"locals"}, cmdFn: filterSortAndOutput(g0f0filter(locals)), helpMsg: "Print function locals, optionally filtered by a regexp."},
 		{aliases: []string{"vars"}, cmdFn: filterSortAndOutput(vars), helpMsg: "Print package variables, optionally filtered by a regexp."},
@@ -703,6 +704,10 @@ func funcs(t *Term, filter string) ([]string, error) {
 	return t.client.ListFunctions(filter)
 }
 
+func types(t *Term, filter string) ([]string, error) {
+	return t.client.ListTypes(filter)
+}
+
 func args(t *Term, scope api.EvalScope, filter string) ([]string, error) {
 	vars, err := t.client.ListFunctionArgs(scope)
 	if err != nil {