libgo: Update to weekly.2012-03-04 release.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@185010 138bc75d-0d04-0410-961f-82ee72b054a4

11 files changed, 69 insertions, 51 deletions

diff --git a/libgo/go/encoding/binary/binary.go b/libgo/go/encoding/binary/binary.go
index b26b1bb2c93..02f090d53f3 100644
--- a/libgo/go/encoding/binary/binary.go
+++ b/libgo/go/encoding/binary/binary.go
@@ -29,17 +29,13 @@ type ByteOrder interface {
 	String() string
 }
 
-// This is byte instead of struct{} so that it can be compared,
-// allowing, e.g., order == binary.LittleEndian.
-type unused byte
-
 // LittleEndian is the little-endian implementation of ByteOrder.
 var LittleEndian littleEndian
 
 // BigEndian is the big-endian implementation of ByteOrder.
 var BigEndian bigEndian
 
-type littleEndian unused
+type littleEndian struct{}
 
 func (littleEndian) Uint16(b []byte) uint16 { return uint16(b[0]) | uint16(b[1])<<8 }
 
@@ -79,7 +75,7 @@ func (littleEndian) String() string { return "LittleEndian" }
 
 func (littleEndian) GoString() string { return "binary.LittleEndian" }
 
-type bigEndian unused
+type bigEndian struct{}
 
 func (bigEndian) Uint16(b []byte) uint16 { return uint16(b[1]) | uint16(b[0])<<8 }
 
diff --git a/libgo/go/encoding/gob/codec_test.go b/libgo/go/encoding/gob/codec_test.go
index d365f826345..ebcbb78ebe6 100644
--- a/libgo/go/encoding/gob/codec_test.go
+++ b/libgo/go/encoding/gob/codec_test.go
@@ -1455,11 +1455,14 @@ func TestFuzz(t *testing.T) {
 func TestFuzzRegressions(t *testing.T) {
 	// An instance triggering a type name of length ~102 GB.
 	testFuzz(t, 1328492090837718000, 100, new(float32))
+	// An instance triggering a type name of 1.6 GB.
+	// Commented out because it takes 5m to run.
+	//testFuzz(t, 1330522872628565000, 100, new(int))
 }
 
 func testFuzz(t *testing.T, seed int64, n int, input ...interface{}) {
-	t.Logf("seed=%d n=%d\n", seed, n)
 	for _, e := range input {
+		t.Logf("seed=%d n=%d e=%T", seed, n, e)
 		rng := rand.New(rand.NewSource(seed))
 		for i := 0; i < n; i++ {
 			encFuzzDec(rng, e)
diff --git a/libgo/go/encoding/gob/debug.go b/libgo/go/encoding/gob/debug.go
index b54ef46f52c..31d1351fc4f 100644
--- a/libgo/go/encoding/gob/debug.go
+++ b/libgo/go/encoding/gob/debug.go
@@ -3,14 +3,15 @@
 // license that can be found in the LICENSE file.
 
 // Delete the next line to include in the gob package.
-// +build gob-debug
+// +build ignore
 
 package gob
 
 // This file is not normally included in the gob package.  Used only for debugging the package itself.
-// Add debug.go to the files listed in the Makefile to add Debug to the gob package.
 // Except for reading uints, it is an implementation of a reader that is independent of
 // the one implemented by Decoder.
+// To enable the Debug function, delete the +build ignore line above and do
+//	go install
 
 import (
 	"bytes"
diff --git a/libgo/go/encoding/gob/decode.go b/libgo/go/encoding/gob/decode.go
index a0bb985300f..0708a83c99a 100644
--- a/libgo/go/encoding/gob/decode.go
+++ b/libgo/go/encoding/gob/decode.go
@@ -392,12 +392,12 @@ func decUint8Slice(i *decInstr, state *decoderState, p unsafe.Pointer) {
 		}
 		p = *(*unsafe.Pointer)(p)
 	}
-	n := int(state.decodeUint())
-	if n < 0 {
-		errorf("negative length decoding []byte")
+	n := state.decodeUint()
+	if n > uint64(state.b.Len()) {
+		errorf("length of []byte exceeds input size (%d bytes)", n)
 	}
 	slice := (*[]uint8)(p)
-	if cap(*slice) < n {
+	if uint64(cap(*slice)) < n {
 		*slice = make([]uint8, n)
 	} else {
 		*slice = (*slice)[0:n]
@@ -417,7 +417,11 @@ func decString(i *decInstr, state *decoderState, p unsafe.Pointer) {
 		}
 		p = *(*unsafe.Pointer)(p)
 	}
-	b := make([]byte, state.decodeUint())
+	n := state.decodeUint()
+	if n > uint64(state.b.Len()) {
+		errorf("string length exceeds input size (%d bytes)", n)
+	}
+	b := make([]byte, n)
 	state.b.Read(b)
 	// It would be a shame to do the obvious thing here,
 	//	*(*string)(p) = string(b)
@@ -647,7 +651,11 @@ func (dec *Decoder) ignoreMap(state *decoderState, keyOp, elemOp decOp) {
 // decodeSlice decodes a slice and stores the slice header through p.
 // Slices are encoded as an unsigned length followed by the elements.
 func (dec *Decoder) decodeSlice(atyp reflect.Type, state *decoderState, p uintptr, elemOp decOp, elemWid uintptr, indir, elemIndir int, ovfl error) {
-	n := int(uintptr(state.decodeUint()))
+	nr := state.decodeUint()
+	if nr > uint64(state.b.Len()) {
+		errorf("length of slice exceeds input size (%d elements)", nr)
+	}
+	n := int(nr)
 	if indir > 0 {
 		up := unsafe.Pointer(p)
 		if *(*unsafe.Pointer)(up) == nil {
@@ -702,6 +710,9 @@ func (dec *Decoder) decodeInterface(ityp reflect.Type, state *decoderState, p ui
 		*(*[2]uintptr)(unsafe.Pointer(p)) = ivalue.InterfaceData()
 		return
 	}
+	if len(name) > 1024 {
+		errorf("name too long (%d bytes): %.20q...", len(name), name)
+	}
 	// The concrete type must be registered.
 	typ, ok := nameToConcreteType[name]
 	if !ok {
diff --git a/libgo/go/encoding/gob/dump.go b/libgo/go/encoding/gob/dump.go
index e23a11e48bf..17238c98df0 100644
--- a/libgo/go/encoding/gob/dump.go
+++ b/libgo/go/encoding/gob/dump.go
@@ -7,6 +7,7 @@
 package main
 
 // Need to compile package gob with debug.go to build this program.
+// See comments in debug.go for how to do this.
 
 import (
 	"encoding/gob"
diff --git a/libgo/go/encoding/gob/encoder_test.go b/libgo/go/encoding/gob/encoder_test.go
index 3bfae30f39a..050786dfd1f 100644
--- a/libgo/go/encoding/gob/encoder_test.go
+++ b/libgo/go/encoding/gob/encoder_test.go
@@ -709,7 +709,7 @@ func TestGobPtrSlices(t *testing.T) {
 		t.Fatal("decode:", err)
 	}
 	if !reflect.DeepEqual(in, out) {
-		t.Fatal("got %v; wanted %v", out, in)
+		t.Fatalf("got %v; wanted %v", out, in)
 	}
 }
 
diff --git a/libgo/go/encoding/json/decode_test.go b/libgo/go/encoding/json/decode_test.go
index 0eec586a9bb..d758758d978 100644
--- a/libgo/go/encoding/json/decode_test.go
+++ b/libgo/go/encoding/json/decode_test.go
@@ -239,16 +239,6 @@ func TestEscape(t *testing.T) {
 	}
 }
 
-func TestHTMLEscape(t *testing.T) {
-	b, err := MarshalForHTML("foobarbaz<>&quux")
-	if err != nil {
-		t.Fatalf("MarshalForHTML error: %v", err)
-	}
-	if !bytes.Equal(b, []byte(`"foobarbaz\u003c\u003e\u0026quux"`)) {
-		t.Fatalf("Unexpected encoding of \"<>&\": %s", b)
-	}
-}
-
 // WrongString is a struct that's misusing the ,string modifier.
 type WrongString struct {
 	Message string `json:"result,string"`
diff --git a/libgo/go/encoding/json/encode.go b/libgo/go/encoding/json/encode.go
index 8a794b79bd5..5425a3a90a1 100644
--- a/libgo/go/encoding/json/encode.go
+++ b/libgo/go/encoding/json/encode.go
@@ -123,17 +123,6 @@ func MarshalIndent(v interface{}, prefix, indent string) ([]byte, error) {
 	return buf.Bytes(), nil
 }
 
-// MarshalForHTML is like Marshal but applies HTMLEscape to the output.
-func MarshalForHTML(v interface{}) ([]byte, error) {
-	b, err := Marshal(v)
-	if err != nil {
-		return nil, err
-	}
-	var buf bytes.Buffer
-	HTMLEscape(&buf, b)
-	return buf.Bytes(), nil
-}
-
 // HTMLEscape appends to dst the JSON-encoded src with <, >, and &
 // characters inside string literals changed to \u003c, \u003e, \u0026
 // so that the JSON will be safe to embed inside HTML <script> tags.
@@ -200,11 +189,6 @@ func (e *MarshalerError) Error() string {
 	return "json: error calling MarshalJSON for type " + e.Type.String() + ": " + e.Err.Error()
 }
 
-type interfaceOrPtrValue interface {
-	IsNil() bool
-	Elem() reflect.Value
-}
-
 var hex = "0123456789abcdef"
 
 // An encodeState encodes JSON into a bytes.Buffer.
@@ -276,7 +260,7 @@ func (e *encodeState) reflectValueQuoted(v reflect.Value, quoted bool) {
 		b, err := m.MarshalJSON()
 		if err == nil {
 			// copy JSON into buffer, checking validity.
-			err = Compact(&e.Buffer, b)
+			err = compact(&e.Buffer, b, true)
 		}
 		if err != nil {
 			e.error(&MarshalerError{v.Type(), err})
diff --git a/libgo/go/encoding/json/encode_test.go b/libgo/go/encoding/json/encode_test.go
index 7a726a91c47..cb1c77eb529 100644
--- a/libgo/go/encoding/json/encode_test.go
+++ b/libgo/go/encoding/json/encode_test.go
@@ -167,3 +167,22 @@ func TestRefValMarshal(t *testing.T) {
 		t.Errorf("got %q, want %q", got, want)
 	}
 }
+
+// C implements Marshaler and returns unescaped JSON.
+type C int
+
+func (C) MarshalJSON() ([]byte, error) {
+	return []byte(`"<&>"`), nil
+}
+
+func TestMarshalerEscaping(t *testing.T) {
+	var c C
+	const want = `"\u003c\u0026\u003e"`
+	b, err := Marshal(c)
+	if err != nil {
+		t.Fatalf("Marshal: %v", err)
+	}
+	if got := string(b); got != want {
+		t.Errorf("got %q, want %q", got, want)
+	}
+}
diff --git a/libgo/go/encoding/json/indent.go b/libgo/go/encoding/json/indent.go
index 5ba19b07ac6..e8dfa4ec436 100644
--- a/libgo/go/encoding/json/indent.go
+++ b/libgo/go/encoding/json/indent.go
@@ -9,11 +9,24 @@ import "bytes"
 // Compact appends to dst the JSON-encoded src with
 // insignificant space characters elided.
 func Compact(dst *bytes.Buffer, src []byte) error {
+	return compact(dst, src, false)
+}
+
+func compact(dst *bytes.Buffer, src []byte, escape bool) error {
 	origLen := dst.Len()
 	var scan scanner
 	scan.reset()
 	start := 0
 	for i, c := range src {
+		if escape && (c == '<' || c == '>' || c == '&') {
+			if start < i {
+				dst.Write(src[start:i])
+			}
+			dst.WriteString(`\u00`)
+			dst.WriteByte(hex[c>>4])
+			dst.WriteByte(hex[c&0xF])
+			start = i + 1
+		}
 		v := scan.step(&scan, int(c))
 		if v >= scanSkipSpace {
 			if v == scanError {
diff --git a/libgo/go/encoding/xml/marshal_test.go b/libgo/go/encoding/xml/marshal_test.go
index 9170fccd243..b6978a1e65b 100644
--- a/libgo/go/encoding/xml/marshal_test.go
+++ b/libgo/go/encoding/xml/marshal_test.go
@@ -136,12 +136,12 @@ type NamePrecedence struct {
 
 type XMLNameWithTag struct {
 	XMLName Name   `xml:"InXMLNameTag"`
-	Value   string ",chardata"
+	Value   string `xml:",chardata"`
 }
 
 type XMLNameWithoutTag struct {
 	XMLName Name
-	Value   string ",chardata"
+	Value   string `xml:",chardata"`
 }
 
 type NameInField struct {
@@ -532,9 +532,9 @@ var marshalTests = []struct {
 			InFieldName: "D",
 		},
 		ExpectXML: `<Parent>` +
-			`<InTag><Value>A</Value></InTag>` +
-			`<InXMLName><Value>B</Value></InXMLName>` +
-			`<InXMLNameTag><Value>C</Value></InXMLNameTag>` +
+			`<InTag>A</InTag>` +
+			`<InXMLName>B</InXMLName>` +
+			`<InXMLNameTag>C</InXMLNameTag>` +
 			`<InFieldName>D</InFieldName>` +
 			`</Parent>`,
 		MarshalOnly: true,
@@ -548,9 +548,9 @@ var marshalTests = []struct {
 			InFieldName: "D",
 		},
 		ExpectXML: `<Parent>` +
-			`<InTag><Value>A</Value></InTag>` +
-			`<FromNameVal><Value>B</Value></FromNameVal>` +
-			`<InXMLNameTag><Value>C</Value></InXMLNameTag>` +
+			`<InTag>A</InTag>` +
+			`<FromNameVal>B</FromNameVal>` +
+			`<InXMLNameTag>C</InXMLNameTag>` +
 			`<InFieldName>D</InFieldName>` +
 			`</Parent>`,
 		UnmarshalOnly: true,