vitess.io/vitess@v0.16.2/go/vt/vtgate/planbuilder/fuzz.go (about)

     1  //go:build gofuzz
     2  // +build gofuzz
     3  
     4  /*
     5  Copyright 2021 The Vitess Authors.
     6  Licensed under the Apache License, Version 2.0 (the "License");
     7  you may not use this file except in compliance with the License.
     8  You may obtain a copy of the License at
     9      http://www.apache.org/licenses/LICENSE-2.0
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package planbuilder
    18  
    19  import (
    20  	"sync"
    21  	"testing"
    22  
    23  	"vitess.io/vitess/go/json2"
    24  	"vitess.io/vitess/go/sqltypes"
    25  	vschemapb "vitess.io/vitess/go/vt/proto/vschema"
    26  	"vitess.io/vitess/go/vt/vtgate/vindexes"
    27  
    28  	fuzz "github.com/AdaLogics/go-fuzz-headers"
    29  )
    30  
    31  var initter sync.Once
    32  
    33  func onceInit() {
    34  	testing.Init()
    35  }
    36  
    37  // loadSchemaForFuzzing is a helper to load *vindexes.VSchema
    38  // for fuzzing.
    39  func loadSchemaForFuzzing(f *fuzz.ConsumeFuzzer) (*vindexes.VSchema, error) {
    40  	//formal, err := vindexes.LoadFormal(filename)
    41  	formal, err := loadFormalForFuzzing(f)
    42  	if err != nil {
    43  		return nil, err
    44  	}
    45  	vschema := vindexes.BuildVSchema(formal)
    46  	if err != nil {
    47  		return nil, err
    48  	}
    49  	for _, ks := range vschema.Keyspaces {
    50  		if ks.Error != nil {
    51  			return nil, err
    52  		}
    53  
    54  		for _, table := range ks.Tables {
    55  			for i, col := range table.Columns {
    56  				if sqltypes.IsText(col.Type) {
    57  					table.Columns[i].CollationName = "latin1_swedish_ci"
    58  				}
    59  			}
    60  		}
    61  	}
    62  	return vschema, nil
    63  }
    64  
    65  // loadFormalForFuzzing is a helper to create *vschemapb.SrvVSchema
    66  func loadFormalForFuzzing(f *fuzz.ConsumeFuzzer) (*vschemapb.SrvVSchema, error) {
    67  	formal := &vschemapb.SrvVSchema{}
    68  	data, err := f.GetBytes()
    69  	if err != nil {
    70  		return nil, err
    71  	}
    72  	err = json2.Unmarshal(data, formal)
    73  	if err != nil {
    74  		return nil, err
    75  	}
    76  	return formal, nil
    77  }
    78  
    79  // FuzzTestBuilder implements the fuzzer
    80  func FuzzTestBuilder(data []byte) int {
    81  	initter.Do(onceInit)
    82  	f := fuzz.NewConsumer(data)
    83  	query, err := f.GetSQLString()
    84  	if err != nil {
    85  		return 0
    86  	}
    87  	keyspace, err := f.GetString()
    88  	if err != nil {
    89  		return 0
    90  	}
    91  	s, err := loadSchemaForFuzzing(f)
    92  	if err != nil {
    93  		return 0
    94  	}
    95  	vschemaWrapper := &vschemaWrapper{
    96  		v:             s,
    97  		sysVarEnabled: true,
    98  	}
    99  
   100  	_, err = TestBuilder(query, vschemaWrapper, keyspace)
   101  	if err != nil {
   102  		return 0
   103  	}
   104  	return 1
   105  }