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-rw-r--r--src/internal/fuzz/encoding_test.go409
1 files changed, 409 insertions, 0 deletions
diff --git a/src/internal/fuzz/encoding_test.go b/src/internal/fuzz/encoding_test.go
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+++ b/src/internal/fuzz/encoding_test.go
@@ -0,0 +1,409 @@
+// Copyright 2021 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package fuzz
+
+import (
+ "math"
+ "strconv"
+ "testing"
+ "unicode"
+)
+
+func TestUnmarshalMarshal(t *testing.T) {
+ var tests = []struct {
+ desc string
+ in string
+ reject bool
+ want string // if different from in
+ }{
+ {
+ desc: "missing version",
+ in: "int(1234)",
+ reject: true,
+ },
+ {
+ desc: "malformed string",
+ in: `go test fuzz v1
+string("a"bcad")`,
+ reject: true,
+ },
+ {
+ desc: "empty value",
+ in: `go test fuzz v1
+int()`,
+ reject: true,
+ },
+ {
+ desc: "negative uint",
+ in: `go test fuzz v1
+uint(-32)`,
+ reject: true,
+ },
+ {
+ desc: "int8 too large",
+ in: `go test fuzz v1
+int8(1234456)`,
+ reject: true,
+ },
+ {
+ desc: "multiplication in int value",
+ in: `go test fuzz v1
+int(20*5)`,
+ reject: true,
+ },
+ {
+ desc: "double negation",
+ in: `go test fuzz v1
+int(--5)`,
+ reject: true,
+ },
+ {
+ desc: "malformed bool",
+ in: `go test fuzz v1
+bool(0)`,
+ reject: true,
+ },
+ {
+ desc: "malformed byte",
+ in: `go test fuzz v1
+byte('aa)`,
+ reject: true,
+ },
+ {
+ desc: "byte out of range",
+ in: `go test fuzz v1
+byte('☃')`,
+ reject: true,
+ },
+ {
+ desc: "extra newline",
+ in: `go test fuzz v1
+string("has extra newline")
+`,
+ want: `go test fuzz v1
+string("has extra newline")`,
+ },
+ {
+ desc: "trailing spaces",
+ in: `go test fuzz v1
+string("extra")
+[]byte("spacing")
+ `,
+ want: `go test fuzz v1
+string("extra")
+[]byte("spacing")`,
+ },
+ {
+ desc: "float types",
+ in: `go test fuzz v1
+float64(0)
+float32(0)`,
+ },
+ {
+ desc: "various types",
+ in: `go test fuzz v1
+int(-23)
+int8(-2)
+int64(2342425)
+uint(1)
+uint16(234)
+uint32(352342)
+uint64(123)
+rune('œ')
+byte('K')
+byte('ÿ')
+[]byte("hello¿")
+[]byte("a")
+bool(true)
+string("hello\\xbd\\xb2=\\xbc ⌘")
+float64(-12.5)
+float32(2.5)`,
+ },
+ {
+ desc: "float edge cases",
+ // The two IEEE 754 bit patterns used for the math.Float{64,32}frombits
+ // encodings are non-math.NAN quiet-NaN values. Since they are not equal
+ // to math.NaN(), they should be re-encoded to their bit patterns. They
+ // are, respectively:
+ // * math.Float64bits(math.NaN())+1
+ // * math.Float32bits(float32(math.NaN()))+1
+ in: `go test fuzz v1
+float32(-0)
+float64(-0)
+float32(+Inf)
+float32(-Inf)
+float32(NaN)
+float64(+Inf)
+float64(-Inf)
+float64(NaN)
+math.Float64frombits(0x7ff8000000000002)
+math.Float32frombits(0x7fc00001)`,
+ },
+ {
+ desc: "int variations",
+ // Although we arbitrarily choose default integer bases (0 or 16), we may
+ // want to change those arbitrary choices in the future and should not
+ // break the parser. Verify that integers in the opposite bases still
+ // parse correctly.
+ in: `go test fuzz v1
+int(0x0)
+int32(0x41)
+int64(0xfffffffff)
+uint32(0xcafef00d)
+uint64(0xffffffffffffffff)
+uint8(0b0000000)
+byte(0x0)
+byte('\000')
+byte('\u0000')
+byte('\'')
+math.Float64frombits(9221120237041090562)
+math.Float32frombits(2143289345)`,
+ want: `go test fuzz v1
+int(0)
+rune('A')
+int64(68719476735)
+uint32(3405705229)
+uint64(18446744073709551615)
+byte('\x00')
+byte('\x00')
+byte('\x00')
+byte('\x00')
+byte('\'')
+math.Float64frombits(0x7ff8000000000002)
+math.Float32frombits(0x7fc00001)`,
+ },
+ {
+ desc: "rune validation",
+ in: `go test fuzz v1
+rune(0)
+rune(0x41)
+rune(-1)
+rune(0xfffd)
+rune(0xd800)
+rune(0x10ffff)
+rune(0x110000)
+`,
+ want: `go test fuzz v1
+rune('\x00')
+rune('A')
+int32(-1)
+rune('�')
+int32(55296)
+rune('\U0010ffff')
+int32(1114112)`,
+ },
+ {
+ desc: "int overflow",
+ in: `go test fuzz v1
+int(0x7fffffffffffffff)
+uint(0xffffffffffffffff)`,
+ want: func() string {
+ switch strconv.IntSize {
+ case 32:
+ return `go test fuzz v1
+int(-1)
+uint(4294967295)`
+ case 64:
+ return `go test fuzz v1
+int(9223372036854775807)
+uint(18446744073709551615)`
+ default:
+ panic("unreachable")
+ }
+ }(),
+ },
+ {
+ desc: "windows new line",
+ in: "go test fuzz v1\r\nint(0)\r\n",
+ want: "go test fuzz v1\nint(0)",
+ },
+ }
+ for _, test := range tests {
+ t.Run(test.desc, func(t *testing.T) {
+ vals, err := unmarshalCorpusFile([]byte(test.in))
+ if test.reject {
+ if err == nil {
+ t.Fatalf("unmarshal unexpected success")
+ }
+ return
+ }
+ if err != nil {
+ t.Fatalf("unmarshal unexpected error: %v", err)
+ }
+ newB := marshalCorpusFile(vals...)
+ if err != nil {
+ t.Fatalf("marshal unexpected error: %v", err)
+ }
+ if newB[len(newB)-1] != '\n' {
+ t.Error("didn't write final newline to corpus file")
+ }
+
+ want := test.want
+ if want == "" {
+ want = test.in
+ }
+ want += "\n"
+ got := string(newB)
+ if got != want {
+ t.Errorf("unexpected marshaled value\ngot:\n%s\nwant:\n%s", got, want)
+ }
+ })
+ }
+}
+
+// BenchmarkMarshalCorpusFile measures the time it takes to serialize byte
+// slices of various sizes to a corpus file. The slice contains a repeating
+// sequence of bytes 0-255 to mix escaped and non-escaped characters.
+func BenchmarkMarshalCorpusFile(b *testing.B) {
+ buf := make([]byte, 1024*1024)
+ for i := 0; i < len(buf); i++ {
+ buf[i] = byte(i)
+ }
+
+ for sz := 1; sz <= len(buf); sz <<= 1 {
+ sz := sz
+ b.Run(strconv.Itoa(sz), func(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ b.SetBytes(int64(sz))
+ marshalCorpusFile(buf[:sz])
+ }
+ })
+ }
+}
+
+// BenchmarkUnmarshalCorpusfile measures the time it takes to deserialize
+// files encoding byte slices of various sizes. The slice contains a repeating
+// sequence of bytes 0-255 to mix escaped and non-escaped characters.
+func BenchmarkUnmarshalCorpusFile(b *testing.B) {
+ buf := make([]byte, 1024*1024)
+ for i := 0; i < len(buf); i++ {
+ buf[i] = byte(i)
+ }
+
+ for sz := 1; sz <= len(buf); sz <<= 1 {
+ sz := sz
+ data := marshalCorpusFile(buf[:sz])
+ b.Run(strconv.Itoa(sz), func(b *testing.B) {
+ for i := 0; i < b.N; i++ {
+ b.SetBytes(int64(sz))
+ unmarshalCorpusFile(data)
+ }
+ })
+ }
+}
+
+func TestByteRoundTrip(t *testing.T) {
+ for x := 0; x < 256; x++ {
+ b1 := byte(x)
+ buf := marshalCorpusFile(b1)
+ vs, err := unmarshalCorpusFile(buf)
+ if err != nil {
+ t.Fatal(err)
+ }
+ b2 := vs[0].(byte)
+ if b2 != b1 {
+ t.Fatalf("unmarshaled %v, want %v:\n%s", b2, b1, buf)
+ }
+ }
+}
+
+func TestInt8RoundTrip(t *testing.T) {
+ for x := -128; x < 128; x++ {
+ i1 := int8(x)
+ buf := marshalCorpusFile(i1)
+ vs, err := unmarshalCorpusFile(buf)
+ if err != nil {
+ t.Fatal(err)
+ }
+ i2 := vs[0].(int8)
+ if i2 != i1 {
+ t.Fatalf("unmarshaled %v, want %v:\n%s", i2, i1, buf)
+ }
+ }
+}
+
+func FuzzFloat64RoundTrip(f *testing.F) {
+ f.Add(math.Float64bits(0))
+ f.Add(math.Float64bits(math.Copysign(0, -1)))
+ f.Add(math.Float64bits(math.MaxFloat64))
+ f.Add(math.Float64bits(math.SmallestNonzeroFloat64))
+ f.Add(math.Float64bits(math.NaN()))
+ f.Add(uint64(0x7FF0000000000001)) // signaling NaN
+ f.Add(math.Float64bits(math.Inf(1)))
+ f.Add(math.Float64bits(math.Inf(-1)))
+
+ f.Fuzz(func(t *testing.T, u1 uint64) {
+ x1 := math.Float64frombits(u1)
+
+ b := marshalCorpusFile(x1)
+ t.Logf("marshaled math.Float64frombits(0x%x):\n%s", u1, b)
+
+ xs, err := unmarshalCorpusFile(b)
+ if err != nil {
+ t.Fatal(err)
+ }
+ if len(xs) != 1 {
+ t.Fatalf("unmarshaled %d values", len(xs))
+ }
+ x2 := xs[0].(float64)
+ u2 := math.Float64bits(x2)
+ if u2 != u1 {
+ t.Errorf("unmarshaled %v (bits 0x%x)", x2, u2)
+ }
+ })
+}
+
+func FuzzRuneRoundTrip(f *testing.F) {
+ f.Add(rune(-1))
+ f.Add(rune(0xd800))
+ f.Add(rune(0xdfff))
+ f.Add(rune(unicode.ReplacementChar))
+ f.Add(rune(unicode.MaxASCII))
+ f.Add(rune(unicode.MaxLatin1))
+ f.Add(rune(unicode.MaxRune))
+ f.Add(rune(unicode.MaxRune + 1))
+ f.Add(rune(-0x80000000))
+ f.Add(rune(0x7fffffff))
+
+ f.Fuzz(func(t *testing.T, r1 rune) {
+ b := marshalCorpusFile(r1)
+ t.Logf("marshaled rune(0x%x):\n%s", r1, b)
+
+ rs, err := unmarshalCorpusFile(b)
+ if err != nil {
+ t.Fatal(err)
+ }
+ if len(rs) != 1 {
+ t.Fatalf("unmarshaled %d values", len(rs))
+ }
+ r2 := rs[0].(rune)
+ if r2 != r1 {
+ t.Errorf("unmarshaled rune(0x%x)", r2)
+ }
+ })
+}
+
+func FuzzStringRoundTrip(f *testing.F) {
+ f.Add("")
+ f.Add("\x00")
+ f.Add(string([]rune{unicode.ReplacementChar}))
+
+ f.Fuzz(func(t *testing.T, s1 string) {
+ b := marshalCorpusFile(s1)
+ t.Logf("marshaled %q:\n%s", s1, b)
+
+ rs, err := unmarshalCorpusFile(b)
+ if err != nil {
+ t.Fatal(err)
+ }
+ if len(rs) != 1 {
+ t.Fatalf("unmarshaled %d values", len(rs))
+ }
+ s2 := rs[0].(string)
+ if s2 != s1 {
+ t.Errorf("unmarshaled %q", s2)
+ }
+ })
+}
generated by cgit v1.2.3 (git 2.39.1) at 2025-01-24 08:39:12 +0000