func (s *Server) handleMapElement(req *proxyrpc.MapElementRequest, resp *proxyrpc.MapElementResponse) error {
t, err := s.dwarfData.Type(dwarf.Offset(req.Map.TypeID))
if err != nil {
return err
}
m, ok := t.(*dwarf.MapType)
if !ok {
return fmt.Errorf("variable is not a map")
}
var count uint64
// fn will be called for each element of the map.
// When we reach the requested element, we fill in *resp and stop.
// TODO: cache locations of elements.
fn := func(keyAddr, valAddr uint64, keyType, valType dwarf.Type) bool {
count++
if count == req.Index+1 {
resp.Key = program.Var{TypeID: uint64(keyType.Common().Offset), Address: keyAddr}
resp.Value = program.Var{TypeID: uint64(valType.Common().Offset), Address: valAddr}
return false
}
return true
}
if err := s.peekMapValues(m, req.Map.Address, fn); err != nil {
return err
}
if count <= req.Index {
// There weren't enough elements.
return fmt.Errorf("map has no element %d", req.Index)
}
return nil
}
func (s *Server) handleValue(req *proxyrpc.ValueRequest, resp *proxyrpc.ValueResponse) error {
t, err := s.dwarfData.Type(dwarf.Offset(req.Var.TypeID))
if err != nil {
return err
}
resp.Value, err = s.value(t, req.Var.Address)
return err
}
{
"testdata/go-relocation-test-gcc441-x86.obj",
[]relocationTestEntry{
{0, &dwarf.Entry{Offset: 0xb, Tag: dwarf.TagCompileUnit, Children: true, Field: []dwarf.Field{{Attr: dwarf.AttrProducer, Val: "GNU C 4.4.1"}, {Attr: dwarf.AttrLanguage, Val: int64(1)}, {Attr: dwarf.AttrName, Val: "t.c"}, {Attr: dwarf.AttrCompDir, Val: "/tmp"}, {Attr: dwarf.AttrLowpc, Val: uint64(0x0)}, {Attr: dwarf.AttrHighpc, Val: uint64(0x5)}, {Attr: dwarf.AttrStmtList, Val: int64(0)}}}},
},
},
{
"testdata/go-relocation-test-gcc424-x86-64.obj",
[]relocationTestEntry{
{0, &dwarf.Entry{Offset: 0xb, Tag: dwarf.TagCompileUnit, Children: true, Field: []dwarf.Field{{Attr: dwarf.AttrProducer, Val: "GNU C 4.2.4 (Ubuntu 4.2.4-1ubuntu4)"}, {Attr: dwarf.AttrLanguage, Val: int64(1)}, {Attr: dwarf.AttrName, Val: "go-relocation-test-gcc424.c"}, {Attr: dwarf.AttrCompDir, Val: "/tmp"}, {Attr: dwarf.AttrLowpc, Val: uint64(0x0)}, {Attr: dwarf.AttrHighpc, Val: uint64(0x6)}, {Attr: dwarf.AttrStmtList, Val: int64(0)}}}},
},
},
{
"testdata/gcc-amd64-openbsd-debug-with-rela.obj",
[]relocationTestEntry{
{203, &dwarf.Entry{Offset: 0xc62, Tag: dwarf.TagMember, Children: false, Field: []dwarf.Field{{Attr: dwarf.AttrName, Val: "it_interval"}, {Attr: dwarf.AttrDeclFile, Val: int64(7)}, {Attr: dwarf.AttrDeclLine, Val: int64(236)}, {Attr: dwarf.AttrType, Val: dwarf.Offset(0xb7f)}, {Attr: dwarf.AttrDataMemberLoc, Val: []byte{0x23, 0x0}}}}},
{204, &dwarf.Entry{Offset: 0xc70, Tag: dwarf.TagMember, Children: false, Field: []dwarf.Field{{Attr: dwarf.AttrName, Val: "it_value"}, {Attr: dwarf.AttrDeclFile, Val: int64(7)}, {Attr: dwarf.AttrDeclLine, Val: int64(237)}, {Attr: dwarf.AttrType, Val: dwarf.Offset(0xb7f)}, {Attr: dwarf.AttrDataMemberLoc, Val: []byte{0x23, 0x10}}}}},
},
},
}
func TestDWARFRelocations(t *testing.T) {
for i, test := range relocationTests {
f, err := Open(test.file)
if err != nil {
t.Error(err)
continue
}
dwarf, err := f.DWARF()
if err != nil {
t.Error(err)