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

Fuzzer details

Fuzzer: utf8proc_fuzzer

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 3 4.28%
gold [1:9] 0 0.0%
yellow [10:29] 0 0.0%
greenyellow [30:49] 0 0.0%
lawngreen 50+ 67 95.7%
All colors 70 100

Fuzz blockers

The followings are the branches where fuzzer fails to bypass.

Unique non-covered Complexity Unique Reachable Complexities Unique Reachable Functions All non-covered Complexity All Reachable Complexity Function Name Function Callsite Blocked Branch
0 0 None 0 270 utf8proc_decompose_char call site: 00046 /src/utf8proc/utf8proc.c:448
0 0 None 0 270 utf8proc_decompose_char call site: 00046 /src/utf8proc/utf8proc.c:454
0 0 None 0 268 utf8proc_decompose_char call site: 00046 /src/utf8proc/utf8proc.c:457
0 0 None 0 268 utf8proc_decompose_char call site: 00046 /src/utf8proc/utf8proc.c:483
0 0 None 0 224 utf8proc_decompose_custom call site: 00042 /src/utf8proc/utf8proc.c:538
0 0 None 0 0 utf8proc_decompose_char call site: 00047 /src/utf8proc/utf8proc.c:499
0 0 None 0 0 utf8proc_map_custom call site: 00056 /src/utf8proc/utf8proc.c:741
0 0 1 :

['free']

0 0 utf8proc_map_custom call site: 00057 /src/utf8proc/utf8proc.c:746

Runtime coverage analysis

Covered functions
32
Functions that are reachable but not covered
3
Reachable functions
35
Percentage of reachable functions covered
91.43%
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
test/fuzzer.c 1
utf8proc.c 32