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

Fuzzer details

Fuzzer: fuzz_detector

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 40 21.8%
gold [1:9] 0 0.0%
yellow [10:29] 0 0.0%
greenyellow [30:49] 0 0.0%
lawngreen 50+ 143 78.1%
All colors 183 100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked Calltree index Parent function Callsite Largest blocked function
12 148 chardet.sbcsgroupprober.SBCSGroupProber.__init__ call site: 00148 chardet.sbcharsetprober.SingleByteCharSetProber.__init__
4 2 ...fuzz_detector.TestOneInput call site: 00002 chardet.universaldetector.UniversalDetector.__init__
3 176 chardet.universaldetector.UniversalDetector.close call site: 00176 .isinstance
2 14 chardet.utf1632prober.UTF1632Prober.reset call site: 00014 chardet.universaldetector.UniversalDetector.feed
2 30 chardet.utf1632prober.UTF1632Prober.feed call site: 00030 chardet.utf1632prober.UTF1632Prober.get_confidence
2 170 chardet.universaldetector.UniversalDetector.feed call site: 00170 chardet.universaldetector.UniversalDetector.close
1 8 chardet.universaldetector.UniversalDetector.__init__ call site: 00008 chardet.escprober.EscCharSetProber.reset
1 12 chardet.escprober.EscCharSetProber.reset call site: 00012 chardet.utf1632prober.UTF1632Prober.reset
1 34 chardet.utf1632prober.UTF1632Prober.approx_16bit_chars call site: 00034 chardet.utf1632prober.UTF1632Prober.is_likely_utf16be
1 36 chardet.utf1632prober.UTF1632Prober.is_likely_utf16be call site: 00036 chardet.utf1632prober.UTF1632Prober.is_likely_utf32le
1 39 chardet.utf1632prober.UTF1632Prober.approx_32bit_chars call site: 00039 chardet.utf1632prober.UTF1632Prober.is_likely_utf32be
1 53 chardet.escprober.EscCharSetProber.feed call site: 00053 chardet.escprober.EscCharSetProber.get_confidence

Runtime coverage analysis

Covered functions
186
Functions that are reachable but not covered
20
Reachable functions
79
Percentage of reachable functions covered
74.68%
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
/ 1
...fuzz_detector 5
chardet 5
chardet.universaldetector 24
chardet.escprober 7
chardet.utf1632prober 11
chardet.codingstatemachine 2
chardet.mbcsgroupprober 11
chardet.utf8prober 4
chardet.sjisprober 6
chardet.chardistribution 1
chardet.jpcntx 2
chardet.eucjpprober 6
chardet.gb2312prober 6
chardet.mbcharsetprober 4
chardet.euckrprober 6
chardet.cp949prober 6
chardet.big5prober 6
chardet.euctwprober 6
chardet.johabprober 6
chardet.charsetgroupprober 2
chardet.sbcsgroupprober 5
chardet.hebrewprober 2
chardet.sbcharsetprober 3
chardet.latin1prober 2
chardet.macromanprober 2

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
[] []
chardet.sbcharsetprober ['fuzz_detector'] []
chardet.euckrfreq [] []
chardet.metadata.languages [] []
chardet.codingstatemachine ['fuzz_detector'] []
chardet.macromanprober ['fuzz_detector'] []
chardet.eucjpprober ['fuzz_detector'] []
typing [] []
chardet.resultdict [] []
chardet.euctwprober ['fuzz_detector'] []
chardet.escprober ['fuzz_detector'] []
chardet.metadata [] []
chardet.sjisprober ['fuzz_detector'] []
chardet.langturkishmodel [] []
chardet.codingstatemachinedict [] []
chardet.big5prober ['fuzz_detector'] []
chardet.langbulgarianmodel [] []
chardet.gb2312freq [] []
logging [] []
chardet.cp949prober ['fuzz_detector'] []
chardet.mbcssm [] []
chardet.hebrewprober ['fuzz_detector'] []
chardet.chardistribution ['fuzz_detector'] []
chardet.langgreekmodel [] []
chardet.langthaimodel [] []
chardet.utf1632prober ['fuzz_detector'] []
chardet.johabprober ['fuzz_detector'] []
chardet.langrussianmodel [] []
chardet.mbcsgroupprober ['fuzz_detector'] []
chardet.gb2312prober ['fuzz_detector'] []
chardet.euctwfreq [] []
chardet.big5freq [] []
chardet.universaldetector ['fuzz_detector'] []
[] []
chardet.jisfreq [] []
argparse [] []
chardet ['fuzz_detector'] []
chardet.escsm [] []
chardet.langhebrewmodel [] []
chardet.version [] []
chardet.charsetgroupprober ['fuzz_detector'] []
chardet.euckrprober ['fuzz_detector'] []
chardet.__main__ [] []
chardet.sbcsgroupprober ['fuzz_detector'] []
chardet.jpcntx ['fuzz_detector'] []
chardet.mbcharsetprober ['fuzz_detector'] []
chardet.utf8prober ['fuzz_detector'] []
chardet.langhungarianmodel [] []
chardet.cli.chardetect [] []
chardet.cli [] []
re [] []
chardet.johabfreq [] []
atheris [] []
chardet.enums [] []
...fuzz_detector ['fuzz_detector'] []
chardet.latin1prober ['fuzz_detector'] []
chardet.charsetprober [] []

Directories in report

Directory