// Fetches all variables of a specific type in the current function scope
func (thread *Thread) variablesByTag(tag dwarf.Tag) ([]*Variable, error) {
pc, err := thread.PC()
if err != nil {
return nil, err
}
reader := thread.dbp.DwarfReader()
_, err = reader.SeekToFunction(pc)
if err != nil {
return nil, err
}
vars := make([]*Variable, 0)
for entry, err := reader.NextScopeVariable(); entry != nil; entry, err = reader.NextScopeVariable() {
if err != nil {
return nil, err
}
if entry.Tag == tag {
val, err := thread.extractVariableFromEntry(entry)
if err != nil {
// skip variables that we can't parse yet
continue
}
vars = append(vars, val)
}
}
return vars, nil
}
// Fetches all variables of a specific type in the current function scope
func (scope *EvalScope) variablesByTag(tag dwarf.Tag, cfg LoadConfig) ([]*Variable, error) {
reader := scope.DwarfReader()
_, err := reader.SeekToFunction(scope.PC)
if err != nil {
return nil, err
}
var vars []*Variable
for entry, err := reader.NextScopeVariable(); entry != nil; entry, err = reader.NextScopeVariable() {
if err != nil {
return nil, err
}
if entry.Tag == tag {
val, err := scope.extractVariableFromEntry(entry, cfg)
if err != nil {
// skip variables that we can't parse yet
continue
}
vars = append(vars, val)
}
}
return vars, nil
}
// Returns the value of the named variable.
func (thread *Thread) EvalVariable(name string) (*Variable, error) {
pc, err := thread.PC()
if err != nil {
return nil, err
}
reader := thread.dbp.DwarfReader()
_, err = reader.SeekToFunction(pc)
if err != nil {
return nil, err
}
varName := name
memberName := ""
if strings.Contains(name, ".") {
idx := strings.Index(name, ".")
varName = name[:idx]
memberName = name[idx+1:]
}
for entry, err := reader.NextScopeVariable(); entry != nil; entry, err = reader.NextScopeVariable() {
if err != nil {
return nil, err
}
n, ok := entry.Val(dwarf.AttrName).(string)
if !ok {
continue
}
if n == varName {
if len(memberName) == 0 {
return thread.extractVariableFromEntry(entry)
}
return thread.evaluateStructMember(entry, reader, memberName)
}
}
// Attempt to evaluate name as a package variable.
if memberName != "" {
return thread.EvalPackageVariable(name)
} else {
loc, err := thread.Location()
if err == nil && loc.Fn != nil {
v, err := thread.EvalPackageVariable(loc.Fn.PackageName() + "." + name)
if err == nil {
v.Name = name
return v, nil
}
}
}
return nil, fmt.Errorf("could not find symbol value for %s", name)
}
// Returns the value of the named variable.
func (thread *Thread) EvalVariable(name string) (*Variable, error) {
pc, err := thread.PC()
if err != nil {
return nil, err
}
reader := thread.dbp.DwarfReader()
_, err = reader.SeekToFunction(pc)
if err != nil {
return nil, err
}
varName := name
memberName := ""
if strings.Contains(name, ".") {
idx := strings.Index(name, ".")
varName = name[:idx]
memberName = name[idx+1:]
}
for entry, err := reader.NextScopeVariable(); entry != nil; entry, err = reader.NextScopeVariable() {
if err != nil {
return nil, err
}
n, ok := entry.Val(dwarf.AttrName).(string)
if !ok {
continue
}
if n == varName {
if len(memberName) == 0 {
return thread.extractVariableFromEntry(entry)
}
return thread.evaluateStructMember(entry, reader, memberName)
}
}
return nil, fmt.Errorf("could not find symbol value for %s", name)
}
func (scope *EvalScope) extractVarInfo(varName string) (*Variable, error) {
reader := scope.DwarfReader()
_, err := reader.SeekToFunction(scope.PC)
if err != nil {
return nil, err
}
for entry, err := reader.NextScopeVariable(); entry != nil; entry, err = reader.NextScopeVariable() {
if err != nil {
return nil, err
}
n, ok := entry.Val(dwarf.AttrName).(string)
if !ok {
continue
}
if n == varName {
return scope.extractVarInfoFromEntry(entry, reader)
}
}
return nil, fmt.Errorf("could not find symbol value for %s", varName)
}