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

Fuzzer details

Fuzzer: JsonFuzzer

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 1369 51.9%
gold [1:9] 1218 46.2%
yellow [10:29] 45 1.70%
greenyellow [30:49] 0 0.0%
lawngreen 50+ 1 0.03%
All colors 2633 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
411 1918 [org.codehaus.jettison.json.JSONArray].toString() call site: 01918
233 785 [org.codehaus.jettison.json.JSONObject].numberToString(java.lang.Number) call site: 00785
114 665 [org.codehaus.jettison.json.JSONObject].numberToString(java.lang.Number) call site: 00665
111 242 [org.codehaus.jettison.json.JSONTokener].nextValue() call site: 00242
86 548 [org.codehaus.jettison.json.JSONObject].valueToString(java.lang.Object,boolean) call site: 00548
53 2562 [org.codehaus.jettison.json.JSONArray]. (java.util.Collection) call site: 02562
27 214 [org.codehaus.jettison.json.JSONTokener].nextValue() call site: 00214
25 166 [org.codehaus.jettison.json.JSONTokener].nextValue() call site: 00166
24 79 [org.codehaus.jettison.json.JSONTokener].nextString(char) call site: 00079
22 1116 [org.codehaus.jettison.json.JSONObject].valueToString(java.lang.Object,boolean) call site: 01116
19 1089 [org.codehaus.jettison.json.JSONObject].valueToString(java.lang.Object,boolean) call site: 01089
17 1153 [org.codehaus.jettison.json.JSONObject].valueToString(java.lang.Object,boolean) call site: 01153

Runtime coverage analysis

Covered functions
50
Functions that are reachable but not covered
1
Reachable functions
3
Percentage of reachable functions covered
66.67%
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.
Warning: The number of covered functions are larger than the number of reachable functions. This means that there are more functions covered at runtime than are extracted using static analysis. This is likely a result of the static analysis component failing to extract the right call graph or the coverage runtime being compiled with sanitizers in code that the static analysis has not analysed. This can happen if lto/gold is not used in all places that coverage instrumentation is used.
Function name source code lines source lines hit percentage hit

Files reached

filename functions hit
JsonFuzzer 1
org.codehaus.jettison.json.JSONObject 17
java.lang.Object 6
java.util.LinkedHashMap 5
org.codehaus.jettison.json.JSONTokener 14
java.lang.String 31
java.lang.StringLatin1 12
java.lang.StringUTF16 17
org.codehaus.jettison.json.JSONException 3
java.lang.Exception 2
java.lang.Throwable 9
sun.nio.fs.UnixException 2
java.lang.StringBuilder 11
java.lang.StringIndexOutOfBoundsException 2
java.lang.Integer 18
java.lang.NumberFormatException 2
java.lang.Character 7
java.lang.CharacterData 1
org.codehaus.jettison.json.JSONArray 10
java.util.ArrayList 9
java.lang.Number 1
java.lang.Long 14
java.math.BigDecimal 4
java.lang.Double 14
jdk.internal.math.FloatingDecimal 11
jdk.internal.math.FloatingDecimal$ASCIIToBinaryBuffer 2
java.lang.Math 2
jdk.internal.math.FDBigInteger 33
java.lang.AssertionError 5
java.lang.Error 2
java.util.Arrays 5
java.util.AbstractCollection 1
java.security.cert.CertPath 3
java.util.concurrent.ConcurrentHashMap 6
sun.reflect.annotation.TypeAnnotation$TypeAnnotationTargetInfo 1
java.lang.invoke.SerializedLambda 1
java.lang.invoke.ClassSpecializer$SpeciesData 3
java.util.concurrent.locks.AbstractQueuedSynchronizer 1
java.lang.module.ModuleDescriptor 4
java.text.FieldPosition 3
java.security.PrivilegedActionException 1
java.nio.ByteOrder 1
java.net.URI 3
java.net.Proxy 3
sun.util.locale.Extension 1
java.lang.reflect.Method 3
java.lang.module.ModuleDescriptor$Requires 3
java.util.jar.Attributes$Name 3
java.time.ZonedDateTime 3
java.util.ResourceBundle$CacheKey 3
java.lang.invoke.StringConcatFactory$Recipe 2
java.math.MathContext 3
java.time.OffsetTime 3
java.text.ParsePosition 3
java.util.Locale 4
java.util.TreeMap$Entry 5
java.util.PropertyPermission 2
java.util.concurrent.CopyOnWriteArrayList 4
java.util.concurrent.ConcurrentHashMap$EntrySetView 3
java.nio.file.attribute.FileTime 3
java.nio.CharBuffer 3
java.lang.Character$Subset 3
jdk.internal.module.IllegalAccessLogger$Usage 2
sun.nio.fs.UnixPath 3
java.util.Vector 4
java.lang.Thread$WeakClassKey 2
jdk.internal.module.ServicesCatalog$ServiceProvider 2
java.util.Objects 4
java.lang.reflect.Parameter 3
java.util.AbstractMap 6
java.util.Date 4
java.security.Provider$ServiceKey 2
java.nio.DoubleBuffer 3
java.util.OptionalDouble 3
java.net.Inet4Address 2
java.lang.ProcessHandleImpl 3
java.util.HashMap$Node 5
java.lang.module.ModuleDescriptor$Provides 3
java.math.BigInteger 5
java.util.WeakHashMap$Entry 5
java.lang.ProcessBuilder$Redirect 2
java.security.Timestamp 3
sun.nio.ch.FileKey 2
java.time.OffsetDateTime 3
javax.xml.namespace.QName 3
java.lang.StackTraceElement 3
java.lang.module.ModuleDescriptor$Exports 3
java.lang.Boolean 5
java.time.chrono.AbstractChronology 3
java.lang.module.ModuleDescriptor$Version 3
java.time.LocalDateTime 3
java.util.Optional 3
jdk.internal.jimage.ImageReader$Node 4
sun.util.calendar.Era 3
java.lang.Byte 5
java.lang.reflect.Constructor 3
java.util.AbstractList 2
java.security.CodeSigner 3
java.time.ZoneOffset 3
java.util.Hashtable 7
java.lang.Runtime$Version 3
java.time.Duration 3
java.util.Calendar 4
java.time.Clock 2
java.util.Hashtable$Entry 6
java.time.zone.ZoneRules 3
java.util.OptionalInt 3
java.security.AccessControlContext 2
java.util.OptionalLong 3
java.text.NumberFormat 3
java.lang.invoke.LambdaForm$Name 3
java.nio.charset.Charset 3
java.net.NetworkInterface 3
sun.util.calendar.CalendarDate 4
sun.util.locale.BaseLocale 3
java.lang.module.ResolvedModule 3
jdk.internal.org.objectweb.asm.Handle 3
javax.crypto.CryptoPermission 3
java.util.Properties 7
java.text.Collator 2
java.lang.reflect.Field 3
java.security.BasicPermission 2
java.nio.IntBuffer 3
java.lang.invoke.StringConcatFactory$Key 2
java.security.cert.Certificate 2
java.lang.invoke.MemberName 4
java.lang.module.ModuleDescriptor$Opens 3
java.io.FilePermission 2
org.codehaus.jettison.json.JSONObject$Null 4
jdk.internal.module.ModuleReferenceImpl 4
java.lang.module.ModuleReference 1
java.util.AbstractSet 2
java.util.concurrent.ConcurrentHashMap$Node 5
java.time.zone.ZoneOffsetTransitionRule 3
java.security.CodeSource 3
java.text.AttributedCharacterIterator$Attribute 3
java.security.AllPermission 2
java.time.Instant 3
sun.util.locale.BaseLocale$Key 2
jdk.internal.misc.Signal 3
jdk.internal.loader.AbstractClassLoaderValue$Sub 3
java.util.jar.Attributes 6
java.text.MessageFormat 3
java.lang.invoke.StringConcatFactory$RecipeElement 2
java.net.InetAddress 3
java.nio.ByteBuffer 3
java.util.zip.ZipFile$Source$Key 2
java.util.concurrent.ConcurrentHashMap$KeySetView 3
java.lang.Short 5
java.lang.invoke.LambdaForm$NamedFunction 3
sun.util.locale.LocaleExtensions 3
java.time.temporal.ValueRange 3
java.nio.ShortBuffer 3
java.time.ZoneId 3
java.time.format.DecimalStyle 3
java.net.URL 3
java.time.zone.ZoneOffsetTransition 3
javax.security.auth.Subject 3
java.time.Period 3
java.net.SocketPermission 2
java.text.DecimalFormatSymbols 3
java.lang.invoke.MethodType 3
sun.nio.fs.UnixFileStore 3
java.text.DateFormatSymbols 3
java.lang.invoke.LambdaFormEditor$Transform 3
java.nio.LongBuffer 3
java.text.DateFormat 3
java.io.File 5
java.time.LocalDate 3
java.net.InterfaceAddress 3
java.time.LocalTime 3
java.lang.Enum 4
java.lang.invoke.LambdaForm 3
java.util.IdentityHashMap 6
java.util.jar.Manifest 3
java.net.HttpCookie 4
java.lang.Float 12
java.nio.FloatBuffer 3
jdk.internal.module.ModuleHashes 3
java.util.WeakHashMap 3
java.util.HashMap 7
java.util.TreeMap 4
java.util.stream.Collectors$Partition 1
java.security.Provider 3
jdk.internal.module.ModuleBootstrap$2 2
java.io.BufferedReader$1 2
java.nio.file.Files$2 2
java.nio.file.FileTreeIterator 2
java.util.HashSet 2
java.util.TreeMap$EntrySet 1
java.util.TreeMap$KeySet 1
java.util.NoSuchElementException 1
jdk.internal.org.objectweb.asm.Type 5
java.io.InvalidClassException:java.lang.Throwable:java.net.URISyntaxException:java.nio.file.FileSystemException:java.nio.file.InvalidPathException:java.util.regex.PatternSyntaxException:javax.xml.stream.FactoryConfigurationError:org.xml.sax.SAXException:sun.nio.fs.UnixException 1
java.lang.ThreadLocal 1
jdk.internal.math.FloatingDecimal$BinaryToASCIIBuffer 8
java.lang.IllegalArgumentException 2
java.lang.System 2
jdk.internal.math.FloatingDecimal$ExceptionalBinaryToASCIIBuffer 1
java.util.concurrent.atomic.AtomicInteger 1
java.lang.Class 5
java.util.zip.ZipEntry 3
java.lang.Package 2
java.util.concurrent.atomic.AtomicLong 1
java.lang.ModuleLayer 1
sun.security.util.JarConstraintsParameters 1
java.net.Socket 1
java.nio.channels.FileChannel$MapMode 1
java.util.Collection 1
jdk.internal.module.ModuleHashes$lambda_toString_1__1 2
java.util.Map$Entry 1
java.time.format.DateTimeFormatterBuilder$NumberPrinterParser 1
java.util.concurrent.CompletableFuture 1
java.lang.Thread 5
java.lang.ThreadGroup 2
java.security.SecureRandomSpi 1
java.lang.ProcessBuilder$Redirect$2 1
java.nio.channels.FileLock 1
java.lang.invoke.MethodHandles$Lookup 1
java.security.AlgorithmParameters 1
java.security.Permission 1
java.lang.ProcessImpl 1
java.net.URISyntaxException 1
java.io.InvalidClassException 1
java.nio.file.FileSystemException 1
javax.xml.stream.FactoryConfigurationError 1
org.xml.sax.SAXException 2
java.nio.file.InvalidPathException 1
java.util.regex.PatternSyntaxException 1
java.util.DoubleSummaryStatistics 1
jdk.internal.module.ModuleResolution 1
java.lang.invoke.MethodHandleImpl$LoopClauses 1
java.math.MutableBigInteger 1
java.util.concurrent.ForkJoinPool 1
org.xml.sax.SAXParseException 1
java.lang.ProcessBuilder$RedirectPipeImpl 1
java.time.format.DateTimeParseContext 1
java.lang.ProcessBuilder$Redirect$4 1
java.time.temporal.ChronoField 1
java.time.format.DateTimePrintContext 1
java.util.regex.Matcher 3
java.io.ObjectOutputStream$DebugTraceInfoStack 1
java.lang.invoke.Invokers 1
java.lang.invoke.MethodHandle 1
java.nio.charset.CodingErrorAction 1
java.io.CharArrayWriter 1
jdk.internal.perf.PerfCounter 2
sun.reflect.annotation.AnnotationType 1
java.net.ServerSocket 1
java.util.Currency 1
java.lang.module.Configuration 1
java.lang.StringBuffer 1
java.lang.AbstractStringBuilder 1
java.util.concurrent.atomic.AtomicBoolean 1
java.security.Provider$Service 1
java.util.ServiceLoader 1
java.util.regex.Pattern 2
java.security.SecureRandom 1
java.util.concurrent.locks.ReentrantReadWriteLock 1
org.codehaus.jettison.Node 1
java.lang.ProcessBuilder$Redirect$3 1
jdk.internal.org.objectweb.asm.Label 1
sun.security.util.LazyCodeSourcePermissionCollection 1
java.util.concurrent.locks.ReentrantReadWriteLock$WriteLock 1
java.net.SocketImpl 1
java.lang.ProcessBuilder$Redirect$1 1
org.codehaus.jettison.json.JSONStringer 1
java.io.CharArrayWriter:java.io.StringWriter 1
sun.net.www.MessageHeader 1
java.util.LongSummaryStatistics 1
java.security.Signature 2
java.security.PermissionCollection 1
java.io.ObjectStreamClass 1
jdk.internal.jmod.JmodFile$Entry 1
jdk.internal.jmod.JmodFile$Section 1
java.util.Formatter 1
java.io.ObjectStreamField 1
java.time.temporal.ChronoUnit 1
java.util.IntSummaryStatistics 1
java.lang.Module 1
java.time.format.DateTimeFormatter 1
java.io.StringWriter 1
java.time.format.Parsed 1
java.lang.StackFrameInfo 1
java.util.concurrent.locks.ReentrantLock 1
sun.reflect.annotation.TypeAnnotation 1
java.util.StringJoiner 1
java.net.URLConnection 1
java.io.ByteArrayOutputStream 1
java.util.concurrent.locks.ReentrantReadWriteLock$ReadLock 1
java.time.format.DateTimeFormatterBuilder$CompositePrinterParser 1
jdk.internal.org.objectweb.asm.TypePath 4
java.util.concurrent.ConcurrentHashMap$CollectionView 1
java.util.concurrent.ThreadPoolExecutor 1
jdk.internal.misc.Signal$NativeHandler 1
java.lang.ProcessBuilder$Redirect$6 1
java.nio.charset.CoderResult 1
java.util.concurrent.LinkedBlockingQueue 1
java.lang.ProcessBuilder$Redirect$5 1
java.security.MessageDigest 2
java.security.ProtectionDomain 1
java.lang.invoke.MethodTypeForm 1
java.lang.IllegalStateException 1
java.security.MessageDigestSpi 1
java.text.Format 1
java.util.LinkedList 1
java.lang.CloneNotSupportedException 1
java.lang.ref.Reference 1
java.util.ArrayDeque 1
java.util.EnumSet 1
java.text.BreakIterator 1
java.security.SignatureSpi 1
java.util.TimeZone 1
jdk.internal.math.FloatingDecimal$PreparedASCIIToBinaryBuffer 2
org.codehaus.jettison.JSONSequenceTooLargeException 1
java.util.Collections 1
com.code_intelligence.jazzer.api.FuzzedDataProvider 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
java.nio.file.Files [] []
org.codehaus.jettison.json.JSONObject$Null ['JsonFuzzer'] []
org.codehaus.jettison.AbstractXMLEventWriter [] []
org.codehaus.jettison.XsonNamespaceContext [] []
org.codehaus.jettison.util.FastStack [] []
org.codehaus.jettison.mapped.Configuration$ConverterFactory [] []
org.codehaus.jettison.mapped.DefaultConverter [] []
java.io.File ['JsonFuzzer'] []
java.io.InputStream [] []
java.io.BufferedReader [] []
org.codehaus.jettison.AbstractDOMDocumentParser [] []
org.codehaus.jettison.json.JSONTokener ['JsonFuzzer'] []
JsonFuzzer ['JsonFuzzer'] []
org.codehaus.jettison.mapped.MappedXMLInputFactory [] []
org.codehaus.jettison.mapped.Configuration [] []
org.codehaus.jettison.mapped.MappedNamespaceConvention$NullStringConverter [] []
java.util.concurrent.Callable [] []
org.codehaus.jettison.badgerfish.BadgerFishXMLInputFactory [] []
org.codehaus.jettison.mapped.MappedXMLInputFactory$ErrorLocation [] []
java.nio.file.Paths [] []
org.codehaus.jettison.badgerfish.BadgerFishXMLStreamWriter [] []
org.codehaus.jettison.mapped.MappedNamespaceConvention [] []
org.codehaus.jettison.util.StringIndenter [] []
org.codehaus.jettison.AbstractDOMDocumentSerializer [] []
java.io.PrintWriter [] []
java.util.concurrent.Executor [] []
org.codehaus.jettison.mapped.Configuration$1 [] []
org.codehaus.jettison.mapped.MappedXMLStreamWriter [] []
org.codehaus.jettison.Node ['JsonFuzzer'] []
java.lang.ProcessBuilder [] []
org.codehaus.jettison.json.JSONStringer ['JsonFuzzer'] []
org.codehaus.jettison.mapped.MappedXMLStreamReader [] []
java.lang.System ['JsonFuzzer'] []
org.codehaus.jettison.badgerfish.BadgerFishXMLStreamReader [] []
org.codehaus.jettison.AbstractXMLStreamReader$1 [] []
org.codehaus.jettison.mapped.MappedXMLOutputFactory [] []
org.codehaus.jettison.mapped.MappedXMLStreamWriter$JSONPropertyObject [] []
java.io.BufferedWriter [] []
org.codehaus.jettison.mapped.SimpleConverter [] []
org.codehaus.jettison.mapped.MappedXMLStreamWriter$JSONPropertyString [] []
java.lang.Runtime [] []
org.codehaus.jettison.badgerfish.BadgerFishConvention [] []
org.codehaus.jettison.badgerfish.BadgerFishXMLOutputFactory [] []
org.codehaus.jettison.json.JSONException ['JsonFuzzer'] []
org.codehaus.jettison.json.JSONWriter [] []
org.codehaus.jettison.json.JSONArray ['JsonFuzzer'] []
java.io.OutputStream [] []
org.codehaus.jettison.json.JSONObject ['JsonFuzzer'] []

Directories in report

Directory