Fuzz introspector
For issues and ideas: https://github.com/ossf/fuzz-introspector/issues

Fuzzer details

Fuzzer: JSONParserFuzzer

Call tree

The calltree shows the control flow of the fuzzer. This is overlaid with coverage information to display how much of the potential code a fuzzer can reach is in fact covered at runtime. In the following there is a link to a detailed calltree visualisation as well as a bitmap showing a high-level view of the calltree. For further information about these topics please see the glossary for full calltree and calltree overview

Call tree overview bitmap:

The distribution of callsites in terms of coloring is
Color Runtime hitcount Callsite count Percentage
red 0 2690 84.4%
gold [1:9] 0 0.0%
yellow [10:29] 0 0.0%
greenyellow [30:49] 0 0.0%
lawngreen 50+ 497 15.5%
All colors 3187 100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked Calltree index Parent function Callsite Largest blocked function
2362 50 [net.minidev.json.parser.JSONParserBase].readObject(net.minidev.json.writer.JsonReaderI) call site: 00050
174 2521 [net.minidev.json.parser.JSONParserBase].readMain(net.minidev.json.writer.JsonReaderI,boolean[]) call site: 02521
30 2868 [net.minidev.json.parser.JSONParserBase].readMain(net.minidev.json.writer.JsonReaderI,boolean[]) call site: 02868
21 2790 [net.minidev.json.parser.JSONParserBase].readMain(net.minidev.json.writer.JsonReaderI,boolean[]) call site: 02790
21 2909 [net.minidev.json.parser.JSONParserBase].readObject(net.minidev.json.writer.JsonReaderI) call site: 02909
20 19 [net.minidev.json.parser.JSONParserBase].readObject(net.minidev.json.writer.JsonReaderI) call site: 00019
16 2749 [net.minidev.json.parser.JSONParserBase].readArray(net.minidev.json.writer.JsonReaderI) call site: 02749
8 2699 [net.minidev.json.parser.JSONParserBase].readArray(net.minidev.json.writer.JsonReaderI) call site: 02699
7 2510 [net.minidev.json.parser.JSONParserBase].readMain(net.minidev.json.writer.JsonReaderI,boolean[]) call site: 02510
6 2479 [net.minidev.json.parser.JSONParserBase].readObject(net.minidev.json.writer.JsonReaderI) call site: 02479
4 2904 [net.minidev.json.parser.JSONParserBase].readObject(net.minidev.json.writer.JsonReaderI) call site: 02904
3 2501 [net.minidev.json.parser.JSONParserBase].readMain(net.minidev.json.writer.JsonReaderI,boolean[]) call site: 02501

Runtime coverage analysis

Covered functions
53
Functions that are reachable but not covered
1140
Reachable functions
1173
Percentage of reachable functions covered
2.81%
NB: The sum of covered functions and functions that are reachable but not covered need not be equal to Reachable functions . This is because the reachability analysis is an approximation and thus at runtime some functions may be covered that are not included in the reachability analysis. This is a limitation of our static analysis capabilities.
Function name source code lines source lines hit percentage hit

Files reached

filename functions hit
JSONParserFuzzer 1
net.minidev.json.parser.JSONParser 2
net.minidev.json.parser.JSONParserString 8
net.minidev.json.parser.JSONParserBase 15
net.minidev.json.parser.JSONParserReader 3
net.minidev.json.parser.JSONParserByteArray 6
net.minidev.json.writer.DefaultMapperCollection 4
net.minidev.json.writer.DefaultMapperOrdered 4
net.minidev.json.writer.CollectionMapper$MapType 5
net.minidev.json.writer.JsonReaderI 8
net.minidev.json.writer.BeansMapper$Bean:net.minidev.json.writer.BeansMapper$BeanNoConv:net.minidev.json.writer.CollectionMapper$MapClass:net.minidev.json.writer.FakeMapper 1
net.minidev.json.writer.MapperRemapped 7
net.minidev.json.writer.CompessorMapper 15
net.minidev.json.writer.DefaultMapper 4
net.minidev.json.writer.UpdaterMapper 7
net.minidev.json.writer.ArraysMapper$4 1
net.minidev.json.writer.ArraysMapper$1 1
net.minidev.json.writer.ArraysMapper$5 1
net.minidev.json.writer.ArraysMapper$13 1
net.minidev.json.writer.ArraysMapper$15 1
net.minidev.json.writer.ArraysMapper:net.minidev.json.writer.JsonReaderI 1
net.minidev.json.writer.BeansMapper$1 1
net.minidev.asm.ConvertDate 10
net.minidev.json.writer.ArraysMapper$9 1
net.minidev.json.writer.ArraysMapper$12 1
net.minidev.json.writer.ArraysMapper$3 1
net.minidev.json.writer.ArraysMapper$7 1
org.objectweb.asm.Type 17
org.objectweb.asm.Handle 7
net.minidev.json.JSONArray 7
net.minidev.json.reader.JsonWriter$9 2
net.minidev.json.JSONStyle 16
net.minidev.json.JStylerObj$MPSimple 1
net.minidev.json.JStylerObj 6
net.minidev.json.JStylerObj$MPTrue 1
net.minidev.json.JStylerObj$MPAgressive 1
net.minidev.json.JSONValue 4
net.minidev.json.JStylerObj$Escape4Web 1
net.minidev.json.JStylerObj$EscapeLT 1
net.minidev.json.reader.JsonWriter$10 2
net.minidev.json.reader.JsonWriter$6 2
net.minidev.json.reader.JsonWriter$12 2
net.minidev.json.reader.JsonWriter$11 2
net.minidev.json.reader.JsonWriter$1 2
net.minidev.json.JSONObject 8
net.minidev.json.reader.BeansWriterASMRemap 2
net.minidev.asm.BeansAccess 3
net.minidev.asm.ASMUtil 3
net.minidev.asm.Accessor 9
net.minidev.asm.BeansAccessBuilder 7
org.objectweb.asm.ClassWriter 20
org.objectweb.asm.SymbolTable 48
org.objectweb.asm.ByteVector 12
org.objectweb.asm.MethodVisitor 32
org.objectweb.asm.MethodWriter 49
org.objectweb.asm.CurrentFrame 1
org.objectweb.asm.Frame 22
org.objectweb.asm.Label 10
org.objectweb.asm.Symbol 1
org.objectweb.asm.Handler 4
org.objectweb.asm.ConstantDynamic 6
org.objectweb.asm.FieldWriter 7
org.objectweb.asm.Attribute 10
org.objectweb.asm.AnnotationWriter 13
org.objectweb.asm.ModuleWriter 11
org.objectweb.asm.RecordComponentWriter 7
org.objectweb.asm.Attribute$Set 4
org.objectweb.asm.ClassReader 34
org.objectweb.asm.ClassVisitor 15
org.objectweb.asm.ModuleVisitor 8
org.objectweb.asm.AnnotationVisitor 5
org.objectweb.asm.TypeReference 1
org.objectweb.asm.TypePath 5
org.objectweb.asm.RecordComponentVisitor 4
org.objectweb.asm.FieldVisitor 4
net.minidev.asm.DynamicClassLoader 1
net.minidev.json.reader.JsonWriter 4
net.minidev.json.reader.JsonWriter$3 2
net.minidev.json.reader.JsonWriter$8 1
net.minidev.json.JSONNavi 1
org.objectweb.asm.signature.SignatureWriter 1
net.minidev.json.parser.JSONParserBase$MSB 3
net.minidev.json.reader.JsonWriter$15 2
net.minidev.json.reader.JsonWriter$18 2
net.minidev.json.reader.JsonWriter$2 2
net.minidev.json.reader.JsonWriter$7 2
net.minidev.json.reader.BeansWriter 1
net.minidev.json.JSONUtil 3
net.minidev.json.reader.JsonWriter$5 2
net.minidev.json.reader.ArrayWriter 1
net.minidev.json.reader.BeansWriterASM 1
net.minidev.json.reader.JsonWriter$14 2
net.minidev.json.reader.JsonWriter$17 2
net.minidev.json.reader.JsonWriter$4 2
net.minidev.json.reader.JsonWriter$16 2
net.minidev.json.reader.JsonWriter$13 2
net.minidev.json.writer.ArraysMapper$11 1
net.minidev.json.writer.ArraysMapper$10 1
net.minidev.json.writer.ArraysMapper$GenericMapper 3
net.minidev.json.writer.ArraysMapper$16 1
net.minidev.json.writer.ArraysMapper$14 1
net.minidev.json.writer.ArraysMapper$2 1
net.minidev.json.writer.ArraysMapper$8 1
net.minidev.json.writer.ArraysMapper$6 1
net.minidev.json.parser.JSONParserMemory 3
net.minidev.json.parser.JSONParserStream 3
net.minidev.json.writer.CollectionMapper$ListClass:net.minidev.json.writer.CollectionMapper$MapClass:net.minidev.json.writer.DefaultMapper:net.minidev.json.writer.DefaultMapperCollection:net.minidev.json.writer.DefaultMapperOrdered:net.minidev.json.writer.FakeMapper 2
net.minidev.json.writer.CollectionMapper$ListType 3
net.minidev.json.writer.JsonReader 3
net.minidev.json.writer.BeansMapper$BeanNoConv 3
net.minidev.json.writer.BeansMapper$Bean:net.minidev.json.writer.BeansMapper$BeanNoConv 1
net.minidev.json.writer.CollectionMapper$MapClass 2
net.minidev.json.writer.BeansMapper$Bean 3
net.minidev.json.writer.CollectionMapper$MapClass:net.minidev.json.writer.CollectionMapper$MapType 1
net.minidev.json.writer.CollectionMapper$ListClass:net.minidev.json.writer.CollectionMapper$ListType:net.minidev.json.writer.FakeMapper 1
net.minidev.json.writer.ArraysMapper 2
net.minidev.json.writer.FakeMapper 1
net.minidev.json.writer.CollectionMapper$ListClass 1
net.minidev.json.writer.BeansMapper$Bean:net.minidev.json.writer.BeansMapper$BeanNoConv:net.minidev.json.writer.FakeMapper 1

Files and Directories in report

This section shows which files and directories are considered in this report. The main reason for showing this is fuzz introspector may include more code in the reasoning than is desired. This section helps identify if too many files/directories are included, e.g. third party code, which may be irrelevant for the threat model. In the event too much is included, fuzz introspector supports a configuration file that can exclude data from the report. See the following link for more information on how to create a config file: link

Files in report

Source file Reached by Covered by
org.objectweb.asm.TypePath ['JSONParserFuzzer'] []
org.objectweb.asm.RecordComponentVisitor ['JSONParserFuzzer'] []
org.objectweb.asm.signature.SignatureVisitor [] []
org.objectweb.asm.FieldVisitor ['JSONParserFuzzer'] []
net.minidev.asm.Accessor ['JSONParserFuzzer'] []
net.minidev.json.JSONUtil ['JSONParserFuzzer'] []
net.minidev.json.writer.DefaultMapperOrdered ['JSONParserFuzzer'] []
org.objectweb.asm.ConstantDynamic ['JSONParserFuzzer'] []
org.objectweb.asm.Handle ['JSONParserFuzzer'] []
net.minidev.json.reader.JsonWriter ['JSONParserFuzzer'] []
org.objectweb.asm.ClassWriter ['JSONParserFuzzer'] []
net.minidev.json.JSONAwareEx [] []
net.minidev.json.JSONValue ['JSONParserFuzzer'] []
org.objectweb.asm.AnnotationWriter ['JSONParserFuzzer'] []
net.minidev.json.parser.JSONParserMemory ['JSONParserFuzzer'] []
net.minidev.json.JStylerObj$Escape4Web ['JSONParserFuzzer'] []
net.minidev.json.parser.JSONParserBase ['JSONParserFuzzer'] []
org.objectweb.asm.ClassVisitor ['JSONParserFuzzer'] []
org.objectweb.asm.Handler ['JSONParserFuzzer'] []
net.minidev.json.writer.ArraysMapper$11 ['JSONParserFuzzer'] []
net.minidev.json.parser.JSONParserStream ['JSONParserFuzzer'] []
org.objectweb.asm.SymbolTable ['JSONParserFuzzer'] []
net.minidev.asm.BeansAccessConfig [] []
net.minidev.json.writer.ArraysMapper ['JSONParserFuzzer'] []
net.minidev.json.writer.CollectionMapper$MapType ['JSONParserFuzzer'] []
org.objectweb.asm.MethodTooLargeException [] []
net.minidev.json.parser.JSONParserReader ['JSONParserFuzzer'] []
net.minidev.json.reader.JsonWriter$9 ['JSONParserFuzzer'] []
net.minidev.json.writer.MapperRemapped ['JSONParserFuzzer'] []
net.minidev.json.writer.BeansMapper$1 ['JSONParserFuzzer'] []
net.minidev.json.writer.CollectionMapper$MapClass ['JSONParserFuzzer'] []
net.minidev.json.reader.BeansWriter ['JSONParserFuzzer'] []
org.objectweb.asm.Frame ['JSONParserFuzzer'] []
net.minidev.json.writer.ArraysMapper$10 ['JSONParserFuzzer'] []
net.minidev.json.writer.BeansMapper$BeanNoConv ['JSONParserFuzzer'] []
net.minidev.json.writer.ArraysMapper$16 ['JSONParserFuzzer'] []
net.minidev.json.writer.ArraysMapper$8 ['JSONParserFuzzer'] []
net.minidev.json.reader.JsonWriter$15 ['JSONParserFuzzer'] []
net.minidev.json.reader.JsonWriter$12 ['JSONParserFuzzer'] []
net.minidev.json.JSONStreamAwareEx [] []
net.minidev.json.reader.JsonWriter$5 ['JSONParserFuzzer'] []
net.minidev.json.JSONStyle ['JSONParserFuzzer'] []
net.minidev.json.writer.ArraysMapper$15 ['JSONParserFuzzer'] []
net.minidev.json.writer.UpdaterMapper ['JSONParserFuzzer'] []
org.objectweb.asm.CurrentFrame ['JSONParserFuzzer'] []
net.minidev.json.writer.ArraysMapper$4 ['JSONParserFuzzer'] []
net.minidev.json.writer.ArraysMapper$12 ['JSONParserFuzzer'] []
net.minidev.json.reader.JsonWriter$1 ['JSONParserFuzzer'] []
net.minidev.json.reader.JsonWriter$2 ['JSONParserFuzzer'] []
org.objectweb.asm.ClassTooLargeException [] []
net.minidev.json.JSONAware [] []
net.minidev.json.reader.JsonWriter$7 ['JSONParserFuzzer'] []
net.minidev.asm.BeansAccessBuilder ['JSONParserFuzzer'] []
net.minidev.json.reader.JsonWriter$14 ['JSONParserFuzzer'] []
net.minidev.json.writer.ArraysMapper$GenericMapper ['JSONParserFuzzer'] []
net.minidev.asm.FieldFilter [] []
net.minidev.json.writer.CollectionMapper$ListType ['JSONParserFuzzer'] []
net.minidev.json.reader.JsonWriter$3 ['JSONParserFuzzer'] []
net.minidev.json.parser.JSONParserBase$MSB ['JSONParserFuzzer'] []
net.minidev.json.reader.JsonWriter$10 ['JSONParserFuzzer'] []
org.objectweb.asm.Label ['JSONParserFuzzer'] []
net.minidev.json.writer.BeansMapper$Bean ['JSONParserFuzzer'] []
org.objectweb.asm.ClassReader ['JSONParserFuzzer'] []
net.minidev.asm.ASMUtil ['JSONParserFuzzer'] []
org.objectweb.asm.FieldWriter ['JSONParserFuzzer'] []
net.minidev.asm.BeansAccess ['JSONParserFuzzer'] []
net.minidev.json.JStylerObj$StringProtector [] []
net.minidev.json.reader.JsonWriter$17 ['JSONParserFuzzer'] []
org.objectweb.asm.Constants [] []
net.minidev.asm.ConvertDate$StringCmpNS [] []
net.minidev.json.parser.JSONParserByteArray ['JSONParserFuzzer'] []
net.minidev.json.JSONObject ['JSONParserFuzzer'] []
net.minidev.json.writer.ArraysMapper$5 ['JSONParserFuzzer'] []
net.minidev.json.writer.ArraysMapper$6 ['JSONParserFuzzer'] []
net.minidev.json.reader.JsonWriter$18 ['JSONParserFuzzer'] []
net.minidev.json.writer.ArraysMapper$14 ['JSONParserFuzzer'] []
net.minidev.json.reader.ArrayWriter ['JSONParserFuzzer'] []
net.minidev.json.reader.JsonWriterI [] []
net.minidev.json.writer.ArraysMapper$2 ['JSONParserFuzzer'] []
net.minidev.json.JStylerObj$MPAgressive ['JSONParserFuzzer'] []
net.minidev.json.JStylerObj ['JSONParserFuzzer'] []
net.minidev.asm.DynamicClassLoader ['JSONParserFuzzer'] []
net.minidev.json.writer.ArraysMapper$9 ['JSONParserFuzzer'] []
net.minidev.json.JSONNavi ['JSONParserFuzzer'] []
org.objectweb.asm.AnnotationVisitor ['JSONParserFuzzer'] []
net.minidev.json.parser.ParseException [] []
JSONParserFuzzer ['JSONParserFuzzer'] []
org.objectweb.asm.ModuleVisitor ['JSONParserFuzzer'] []
net.minidev.json.reader.JsonWriter$4 ['JSONParserFuzzer'] []
net.minidev.json.parser.JSONParser ['JSONParserFuzzer'] []
net.minidev.json.reader.JsonWriter$13 ['JSONParserFuzzer'] []
net.minidev.json.reader.BeansWriterASMRemap ['JSONParserFuzzer'] []
net.minidev.json.writer.JsonReaderI ['JSONParserFuzzer'] []
net.minidev.json.writer.ArraysMapper$13 ['JSONParserFuzzer'] []
net.minidev.asm.ConvertDate ['JSONParserFuzzer'] []
net.minidev.json.writer.DefaultMapperCollection ['JSONParserFuzzer'] []
net.minidev.json.writer.CollectionMapper$ListClass ['JSONParserFuzzer'] []
net.minidev.asm.BasicFiledFilter [] []
net.minidev.json.writer.FakeMapper ['JSONParserFuzzer'] []
net.minidev.json.writer.DefaultMapper ['JSONParserFuzzer'] []
org.objectweb.asm.ByteVector ['JSONParserFuzzer'] []
org.objectweb.asm.signature.SignatureWriter ['JSONParserFuzzer'] []
net.minidev.json.JSONUtil$JsonSmartFieldFilter [] []
org.objectweb.asm.signature.SignatureReader [] []
org.objectweb.asm.TypeReference ['JSONParserFuzzer'] []
net.minidev.json.writer.ArraysMapper$3 ['JSONParserFuzzer'] []
net.minidev.json.JSONArray ['JSONParserFuzzer'] []
net.minidev.json.JStylerObj$MPSimple ['JSONParserFuzzer'] []
net.minidev.json.writer.ArraysMapper$7 ['JSONParserFuzzer'] []
net.minidev.json.JStylerObj$EscapeLT ['JSONParserFuzzer'] []
org.objectweb.asm.Attribute ['JSONParserFuzzer'] []
net.minidev.json.JSONStreamAware [] []
net.minidev.json.reader.JsonWriter$6 ['JSONParserFuzzer'] []
org.objectweb.asm.RecordComponentWriter ['JSONParserFuzzer'] []
net.minidev.json.reader.JsonWriter$16 ['JSONParserFuzzer'] []
net.minidev.json.reader.JsonWriter$11 ['JSONParserFuzzer'] []
net.minidev.json.parser.JSONParserInputStream [] []
net.minidev.json.writer.BeansMapper [] []
net.minidev.json.writer.JsonReader ['JSONParserFuzzer'] []
net.minidev.json.reader.JsonWriter$8 ['JSONParserFuzzer'] []
net.minidev.json.parser.JSONParserString ['JSONParserFuzzer'] []
net.minidev.json.writer.CompessorMapper ['JSONParserFuzzer'] []
net.minidev.json.reader.BeansWriterASM ['JSONParserFuzzer'] []
net.minidev.json.JStylerObj$MustProtect [] []
org.objectweb.asm.Symbol ['JSONParserFuzzer'] []
org.objectweb.asm.Attribute$Set ['JSONParserFuzzer'] []
net.minidev.asm.DefaultConverter [] []
net.minidev.json.writer.ArraysMapper$1 ['JSONParserFuzzer'] []
org.objectweb.asm.MethodVisitor ['JSONParserFuzzer'] []
org.objectweb.asm.ModuleWriter ['JSONParserFuzzer'] []
net.minidev.json.JStylerObj$MPTrue ['JSONParserFuzzer'] []
org.objectweb.asm.Type ['JSONParserFuzzer'] []
org.objectweb.asm.MethodWriter ['JSONParserFuzzer'] []
net.minidev.json.annotate.JsonIgnore [] []

Directories in report

Directory