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//go:build ignore
// +build ignore
// Copyright 2015 go-fuzz project authors. All rights reserved.
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
package fuzz
import (
"bytes"
encodingJSON "encoding/json"
"fmt"
"reflect"
"github.com/dvyukov/go-fuzz-corpus/fuzz"
"github.com/segmentio/encoding/json"
)
func fixS(v any) {
if s, ok := v.(*S); ok {
if len(s.P) == 0 {
s.P = []byte(`""`)
}
}
}
func Fuzz(data []byte) int {
score := 0
for _, ctor := range []func() any{
func() any { return nil },
func() any { return new([]any) },
func() any { m := map[string]string{}; return &m },
func() any { m := map[string]any{}; return &m },
func() any { return new(S) },
} {
// Note: we modified the test to verify that we behavior like the
// standard encoding/json package, whether it's right or wrong.
v1 := ctor()
v2 := ctor()
err1 := encodingJSON.Unmarshal(data, v1)
err2 := json.Unmarshal(data, v2)
if err1 != nil {
if err2 != nil {
// both implementations report an error
if reflect.TypeOf(err1) != reflect.TypeOf(err2) {
fmt.Printf("input: %s\n", string(data))
fmt.Printf("encoding/json.Unmarshal(%T): %T: %s\n", v1, err1, err1)
fmt.Printf("segmentio/encoding/json.Unmarshal(%T): %T: %s\n", v2, err2, err2)
panic("error types mismatch")
}
continue
} else {
fmt.Printf("input: %s\n", string(data))
fmt.Printf("encoding/json.Unmarshal(%T): %T: %s\n", v1, err1, err1)
fmt.Printf("segmentio/encoding/json.Unmarshal(%T): <nil>\n")
panic("error values mismatch")
}
} else {
if err2 != nil {
fmt.Printf("input: %s\n", string(data))
fmt.Printf("encoding/json.Unmarshal(%T): <nil>\n")
fmt.Printf("segmentio/encoding/json.Unmarshal(%T): %T: %s\n", v2, err2, err2)
panic("error values mismatch")
} else {
// both implementations pass
}
}
score = 1
fixS(v1)
fixS(v2)
if !fuzz.DeepEqual(v1, v2) {
fmt.Printf("input: %s\n", string(data))
fmt.Printf("encoding/json: %#v\n", v1)
fmt.Printf("segmentio/encoding: %#v\n", v2)
panic("not equal")
}
data1, err := encodingJSON.Marshal(v1)
if err != nil {
panic(err)
}
data2, err := json.Marshal(v2)
if err != nil {
panic(err)
}
if !bytes.Equal(data1, data2) {
fmt.Printf("input: %s\n", string(data))
fmt.Printf("encoding/json: %s\n", string(data1))
fmt.Printf("segmentio/encoding: %s\n", string(data2))
panic("not equal")
}
}
return score
}
type S struct {
A int `json:",omitempty"`
B string `json:"B1,omitempty"`
C float64
D bool
E uint8
F []byte
G any
H map[string]any
I map[string]string
J []any
K []string
L S1
M *S1
N *int
O **int
P json.RawMessage
Q Marshaller
R int `json:"-"`
S int `json:",string"`
}
type S1 struct {
A int
B string
}
type Marshaller struct {
v string
}
func (m *Marshaller) MarshalJSON() ([]byte, error) {
return json.Marshal(m.v)
}
func (m *Marshaller) UnmarshalJSON(data []byte) error {
return json.Unmarshal(data, &m.v)
}
|
