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

Fuzzer details

Fuzzer: LogReaderWriterFuzzer

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 0 875 97.8%
gold [1:9] 0 0.0%
yellow [10:29] 0 0.0%
greenyellow [30:49] 0 0.0%
lawngreen 50+ 19 2.12%
All colors 894 100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked Calltree index Parent function Callsite Largest blocked function
524 33 [org.HdrHistogram.DoubleHistogram].isDoubleHistogramCookie(int) call site: 00033
279 614 [org.HdrHistogram.AbstractHistogram].establishSize(long) call site: 00614
26 560 [org.HdrHistogram.AbstractHistogram].decodeFromCompressedByteBuffer(java.nio.ByteBuffer,java.lang.Class,long) call site: 00560
23 587 [org.HdrHistogram.HistogramLogScanner].process(org.HdrHistogram.HistogramLogScanner$EventHandler) call site: 00587
18 13 [org.HdrHistogram.HistogramLogScanner].process(org.HdrHistogram.HistogramLogScanner$EventHandler) call site: 00013
2 4 [org.HdrHistogram.HistogramLogScanner].process(org.HdrHistogram.HistogramLogScanner$EventHandler) call site: 00004
2 7 [org.HdrHistogram.HistogramLogScanner].process(org.HdrHistogram.HistogramLogScanner$EventHandler) call site: 00007
1 11 [org.HdrHistogram.HistogramLogScanner].process(org.HdrHistogram.HistogramLogScanner$EventHandler) call site: 00011

Runtime coverage analysis

Covered functions
32
Functions that are reachable but not covered
511
Reachable functions
533
Percentage of reachable functions covered
4.13%
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
LogReaderWriterFuzzer 1
org.HdrHistogram.HistogramLogReader 14
org.HdrHistogram.HistogramLogScanner 1
org.HdrHistogram.HistogramLogReader$1 5
org.HdrHistogram.HistogramLogScanner$LazyHistogramReader 3
org.HdrHistogram.Base64Helper 1
org.HdrHistogram.EncodableHistogram 1
org.HdrHistogram.DoubleHistogram 10
org.HdrHistogram.AbstractHistogram 39
org.HdrHistogram.IntCountsHistogram 6
org.HdrHistogram.AbstractHistogramBase 2
org.HdrHistogram.ConcurrentHistogram 15
org.HdrHistogram.WriterReaderPhaser 6
org.HdrHistogram.ConcurrentHistogram$AtomicLongArrayWithNormalizingOffset:org.HdrHistogram.PackedConcurrentHistogram$ConcurrentPackedArrayWithNormalizingOffset 3
org.HdrHistogram.Histogram 7
org.HdrHistogram.ShortCountsHistogram 6
org.HdrHistogram.Histogram:org.HdrHistogram.IntCountsHistogram:org.HdrHistogram.ShortCountsHistogram 4
org.HdrHistogram.AtomicHistogram 9
org.HdrHistogram.PackedConcurrentHistogram$ConcurrentPackedArrayWithNormalizingOffset 4
org.HdrHistogram.packedarray.PackedLongArray 10
org.HdrHistogram.packedarray.AbstractPackedLongArray 8
org.HdrHistogram.packedarray.AbstractPackedArrayContext 37
org.HdrHistogram.packedarray.ConcurrentPackedLongArray 4
org.HdrHistogram.packedarray.PackedArrayContext 9
org.HdrHistogram.packedarray.ConcurrentPackedArrayContext 10
org.HdrHistogram.packedarray.ConcurrentPackedArrayContext:org.HdrHistogram.packedarray.PackedArrayContext 1
org.HdrHistogram.packedarray.ResizeException 1
org.HdrHistogram.DoubleAllValuesIterator 2
org.HdrHistogram.AllValuesIterator 2
org.HdrHistogram.PackedConcurrentHistogram 4
org.HdrHistogram.SynchronizedHistogram 13
org.HdrHistogram.DoubleLinearIterator 2
org.HdrHistogram.LinearIterator 3
org.HdrHistogram.AbstractHistogramIterator 5
org.HdrHistogram.packedarray.AbstractPackedArrayContext$NonZeroValuesIterator 3
org.HdrHistogram.DoubleRecordedValuesIterator 2
org.HdrHistogram.RecordedValuesIterator 3
org.HdrHistogram.PercentileIterator 3
org.HdrHistogram.DoublePercentileIterator 2
org.HdrHistogram.packedarray.AbstractPackedLongArray$AllValuesIterator 2
org.HdrHistogram.LogarithmicIterator 3
org.HdrHistogram.DoubleLogarithmicIterator 2
org.HdrHistogram.DoubleHistogram$LinearBucketValues 1
org.HdrHistogram.DoubleHistogram$AllValues 1
org.HdrHistogram.AbstractHistogram$RecordedValues 1
org.HdrHistogram.DoubleHistogram$Percentiles 1
org.HdrHistogram.AbstractHistogram$AllValues 1
org.HdrHistogram.DoubleHistogram$RecordedValues 1
org.HdrHistogram.packedarray.AbstractPackedArrayContext$1 1
org.HdrHistogram.DoubleHistogram$LogarithmicBucketValues 1
org.HdrHistogram.AbstractHistogram$LogarithmicBucketValues 1
org.HdrHistogram.AbstractHistogram$LinearBucketValues 1
org.HdrHistogram.AbstractHistogram$Percentiles 1
org.HdrHistogram.PackedHistogram 6
org.HdrHistogram.AllValuesIterator:org.HdrHistogram.LinearIterator:org.HdrHistogram.LogarithmicIterator:org.HdrHistogram.PercentileIterator 1
org.HdrHistogram.LinearIterator:org.HdrHistogram.LogarithmicIterator 1
org.HdrHistogram.HistogramIterationValue 1
org.HdrHistogram.AbstractHistogramIterator:org.HdrHistogram.PercentileIterator 1
org.HdrHistogram.AllValuesIterator:org.HdrHistogram.RecordedValuesIterator 1
org.HdrHistogram.packedarray.IterationValue 3
org.HdrHistogram.AbstractHistogram:org.HdrHistogram.ConcurrentHistogram 1
org.HdrHistogram.ZigZagEncoding 1
org.HdrHistogram.SynchronizedDoubleHistogram 3
org.HdrHistogram.AtomicHistogram:org.HdrHistogram.Histogram:org.HdrHistogram.IntCountsHistogram:org.HdrHistogram.ShortCountsHistogram 1
org.HdrHistogram.ConcurrentHistogram$AtomicLongArrayWithNormalizingOffset 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.HdrHistogram.IntCountsHistogram ['LogReaderWriterFuzzer'] []
org.HdrHistogram.SingleWriterRecorder [] []
org.HdrHistogram.DoubleHistogram ['LogReaderWriterFuzzer'] []
org.HdrHistogram.LogarithmicIterator ['LogReaderWriterFuzzer'] []
org.HdrHistogram.HistogramLogScanner$EncodableHistogramSupplier [] []
org.HdrHistogram.PercentileIterator ['LogReaderWriterFuzzer'] []
org.HdrHistogram.DoublePercentileIterator ['LogReaderWriterFuzzer'] []
org.HdrHistogram.RecordedValuesIterator ['LogReaderWriterFuzzer'] []
org.HdrHistogram.packedarray.PackedArraySingleWriterRecorder [] []
org.HdrHistogram.ConcurrentHistogram$AtomicLongArrayWithNormalizingOffset ['LogReaderWriterFuzzer'] []
org.HdrHistogram.DoubleHistogram$LogarithmicBucketValues ['LogReaderWriterFuzzer'] []
org.HdrHistogram.Histogram ['LogReaderWriterFuzzer'] []
org.HdrHistogram.HistogramLogReader$1 ['LogReaderWriterFuzzer'] []
org.HdrHistogram.SingleWriterDoubleRecorder$InternalDoubleHistogram [] []
org.HdrHistogram.packedarray.ConcurrentPackedArrayContext ['LogReaderWriterFuzzer'] []
org.HdrHistogram.packedarray.AbstractPackedLongArray ['LogReaderWriterFuzzer'] []
org.HdrHistogram.ZigZagEncoding ['LogReaderWriterFuzzer'] []
org.HdrHistogram.PackedHistogram ['LogReaderWriterFuzzer'] []
org.HdrHistogram.AbstractHistogram$LinearBucketValues ['LogReaderWriterFuzzer'] []
org.HdrHistogram.AbstractHistogramIterator ['LogReaderWriterFuzzer'] []
org.HdrHistogram.DoubleRecordedValuesIterator ['LogReaderWriterFuzzer'] []
org.HdrHistogram.DoubleHistogramIterationValue [] []
org.HdrHistogram.packedarray.ResizeException ['LogReaderWriterFuzzer'] []
org.HdrHistogram.PackedConcurrentDoubleHistogram [] []
org.HdrHistogram.ConcurrentDoubleHistogram [] []
org.HdrHistogram.AbstractHistogram$RecordedValues ['LogReaderWriterFuzzer'] []
org.HdrHistogram.WriterReaderPhaser ['LogReaderWriterFuzzer'] []
org.HdrHistogram.SingleWriterDoubleRecorder [] []
org.HdrHistogram.LinearIterator ['LogReaderWriterFuzzer'] []
org.HdrHistogram.Recorder$InternalAtomicHistogram [] []
org.HdrHistogram.HistogramLogScanner$EventHandler [] []
org.HdrHistogram.EncodableHistogram ['LogReaderWriterFuzzer'] []
org.HdrHistogram.ConcurrentHistogram ['LogReaderWriterFuzzer'] []
org.HdrHistogram.SynchronizedHistogram ['LogReaderWriterFuzzer'] []
org.HdrHistogram.Recorder$InternalConcurrentHistogram [] []
org.HdrHistogram.AbstractHistogram$AllValues ['LogReaderWriterFuzzer'] []
org.HdrHistogram.DoubleAllValuesIterator ['LogReaderWriterFuzzer'] []
org.HdrHistogram.ConcurrentHistogram$ConcurrentArrayWithNormalizingOffset [] []
org.HdrHistogram.AbstractHistogram$LogarithmicBucketValues ['LogReaderWriterFuzzer'] []
org.HdrHistogram.IntervalHistogramProvider [] []
org.HdrHistogram.Recorder [] []
org.HdrHistogram.packedarray.ConcurrentPackedLongArray ['LogReaderWriterFuzzer'] []
org.HdrHistogram.packedarray.PackedArrayRecorder [] []
org.HdrHistogram.HistogramLogProcessor [] []
org.HdrHistogram.HistogramLogReader ['LogReaderWriterFuzzer'] []
org.HdrHistogram.SingleWriterRecorder$InternalHistogram [] []
org.HdrHistogram.SynchronizedDoubleHistogram ['LogReaderWriterFuzzer'] []
org.HdrHistogram.HistogramLogScanner$LazyHistogramReader ['LogReaderWriterFuzzer'] []
org.HdrHistogram.DoubleHistogram$LinearBucketValues ['LogReaderWriterFuzzer'] []
org.HdrHistogram.DoubleHistogram$RecordedValues ['LogReaderWriterFuzzer'] []
org.HdrHistogram.Recorder$InternalPackedConcurrentHistogram [] []
org.HdrHistogram.DoubleHistogram$AllValues ['LogReaderWriterFuzzer'] []
org.HdrHistogram.DoubleLogarithmicIterator ['LogReaderWriterFuzzer'] []
org.HdrHistogram.DoubleRecorder$InternalConcurrentDoubleHistogram [] []
org.HdrHistogram.AllValuesIterator ['LogReaderWriterFuzzer'] []
org.HdrHistogram.DoubleValueRecorder [] []
org.HdrHistogram.HistogramIterationValue ['LogReaderWriterFuzzer'] []
org.HdrHistogram.DoubleRecorder [] []
LogReaderWriterFuzzer ['LogReaderWriterFuzzer'] []
org.HdrHistogram.packedarray.IterationValue ['LogReaderWriterFuzzer'] []
org.HdrHistogram.SingleWriterRecorder$PackedInternalHistogram [] []
org.HdrHistogram.DoubleHistogram$Percentiles ['LogReaderWriterFuzzer'] []
org.HdrHistogram.ValueRecorder [] []
org.HdrHistogram.packedarray.PackedArraySingleWriterRecorder$InternalPackedLongArray [] []
org.HdrHistogram.AbstractHistogram ['LogReaderWriterFuzzer'] []
org.HdrHistogram.HistogramLogWriter [] []
org.HdrHistogram.HistogramLogScanner ['LogReaderWriterFuzzer'] []
org.HdrHistogram.PackedDoubleHistogram [] []
org.HdrHistogram.packedarray.AbstractPackedArrayContext ['LogReaderWriterFuzzer'] []
org.HdrHistogram.ShortCountsHistogram ['LogReaderWriterFuzzer'] []
org.HdrHistogram.AtomicHistogram ['LogReaderWriterFuzzer'] []
org.HdrHistogram.packedarray.PackedArrayContext ['LogReaderWriterFuzzer'] []
org.HdrHistogram.DoubleLinearIterator ['LogReaderWriterFuzzer'] []
org.HdrHistogram.Base64Helper ['LogReaderWriterFuzzer'] []
org.HdrHistogram.PackedConcurrentHistogram ['LogReaderWriterFuzzer'] []
org.HdrHistogram.AbstractHistogramBase ['LogReaderWriterFuzzer'] []
org.HdrHistogram.packedarray.AbstractPackedArrayContext$NonZeroValuesIterator ['LogReaderWriterFuzzer'] []
org.HdrHistogram.packedarray.AbstractPackedLongArray$AllValuesIterator ['LogReaderWriterFuzzer'] []
org.HdrHistogram.packedarray.PackedArrayRecorder$InternalConcurrentPackedLongArray [] []
org.HdrHistogram.PackedConcurrentHistogram$ConcurrentPackedArrayWithNormalizingOffset ['LogReaderWriterFuzzer'] []
org.HdrHistogram.packedarray.AbstractPackedArrayContext$1 ['LogReaderWriterFuzzer'] []
org.HdrHistogram.SingleWriterDoubleRecorder$PackedInternalDoubleHistogram [] []
org.HdrHistogram.DoubleRecorder$PackedInternalConcurrentDoubleHistogram [] []
org.HdrHistogram.packedarray.PackedLongArray ['LogReaderWriterFuzzer'] []
org.HdrHistogram.AbstractHistogram$Percentiles ['LogReaderWriterFuzzer'] []

Directories in report

Directory