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

Fuzzer details

Fuzzer: FuzzDecode

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 16 8.64%
gold [1:9] 0 0.0%
yellow [10:29] 0 0.0%
greenyellow [30:49] 0 0.0%
lawngreen 50+ 169 91.3%
All colors 185 100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked Calltree index Parent function Callsite Largest blocked function
6 80 [org.brotli.dec.BitReader].readBits(org.brotli.dec.State,int) call site: 00080
2 9 [org.brotli.dec.Decode].decodeWindowBits(org.brotli.dec.State) call site: 00009
2 119 [org.brotli.dec.Decode].readMetablockHuffmanCodesAndContextMaps(org.brotli.dec.State) call site: 00119
2 155 [org.brotli.dec.Decode].decompress(org.brotli.dec.State) call site: 00155
2 159 [org.brotli.dec.Decode].doUseDictionary(org.brotli.dec.State,int) call site: 00159
1 4 [org.brotli.dec.Decode].decodeWindowBits(org.brotli.dec.State) call site: 00004
1 137 [org.brotli.dec.Decode].decompress(org.brotli.dec.State) call site: 00137

Runtime coverage analysis

Covered functions
Functions that are reachable but not covered
Reachable functions
Percentage of reachable functions covered
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
FuzzDecode 1
org.brotli.dec.BrotliInputStream 1
org.brotli.dec.Decode 34
org.brotli.dec.BitReader 16
org.brotli.dec.Utils 5
org.brotli.dec.Huffman 4
org.brotli.dec.Dictionary 1
org.brotli.dec.Transform 1