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

Project functions overview

The following table shows data about each function in the project. The functions included in this table correspond to all functions that exist in the executables of the fuzzers. As such, there may be functions that are from third-party libraries.

For further technical details on the meaning of columns in the below table, please see the Glossary .

Func name Functions filename Args Function call depth Reached by Fuzzers Runtime reached by Fuzzers Combined reached by Fuzzers Fuzzers runtime hit Func lines hit % I Count BB Count Cyclomatic complexity Functions reached Reached by functions Accumulated cyclomatic complexity Undiscovered complexity

Fuzzer details

Fuzzer: 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 0 470 34.7%
gold [1:9] 5 0.37%
yellow [10:29] 0 0.0%
greenyellow [30:49] 7 0.51%
lawngreen 50+ 869 64.3%
All colors 1351 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
3044 6211 6 :

['uniqlist(std::__1::vector , std::__1::allocator >, std::__1::allocator , std::__1::allocator > > >&)', 'HunspellImpl::generate(std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&)', 'HunspellImpl::get_xml_list(std::__1::basic_string , std::__1::allocator > const&, unsigned long, char const*)', 'std::__1::vector , std::__1::allocator >, std::__1::allocator , std::__1::allocator > > >::empty[abi:ne180100]() const', 'std::__1::vector , std::__1::allocator >, std::__1::allocator , std::__1::allocator > > >::operator=[abi:ne180100](std::__1::vector , std::__1::allocator >, std::__1::allocator , std::__1::allocator > > >&&)', 'HunspellImpl::generate(std::__1::basic_string , std::__1::allocator > const&, std::__1::vector , std::__1::allocator >, std::__1::allocator , std::__1::allocator > > > const&)']

3044 6299 HunspellImpl::spellml(std::__1::basic_string ,std::__1::allocator >const&) call site: 00000 /src/hunspell/src/hunspell/hunspell.cxx:1936
0 3113 1 :

['HunspellImpl::stem(std::__1::basic_string , std::__1::allocator > const&)']

0 3157 HunspellImpl::spellml(std::__1::basic_string ,std::__1::allocator >const&) call site: 00000 /src/hunspell/src/hunspell/hunspell.cxx:1932
0 2669 14 :

['mystrrep(std::__1::basic_string , std::__1::allocator >&, std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&)', '_ZNSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEC2B8ne180100ILi0EEEPKc', 'std::__1::__wrap_iter , std::__1::allocator >*>::operator++[abi:ne180100]()', 'std::__1::basic_string , std::__1::allocator >::basic_string[abi:ne180100]()', 'bool std::__1::operator!=[abi:ne180100] , std::__1::allocator >*>(std::__1::__wrap_iter , std::__1::allocator >*> const&, std::__1::__wrap_iter , std::__1::allocator >*> const&)', 'std::__1::vector , std::__1::allocator >, std::__1::allocator , std::__1::allocator > > >::end[abi:ne180100]()', 'std::__1::vector , std::__1::allocator >, std::__1::allocator , std::__1::allocator > > >::begin[abi:ne180100]()', 'std::__1::__wrap_iter , std::__1::allocator >*>::operator*[abi:ne180100]() const', 'HunspellImpl::analyze(std::__1::basic_string , std::__1::allocator > const&)', 'std::__1::vector , std::__1::allocator >, std::__1::allocator , std::__1::allocator > > >::push_back[abi:ne180100](std::__1::basic_string , std::__1::allocator > const&)', 'std::__1::basic_string , std::__1::allocator >::append[abi:ne180100](std::__1::basic_string , std::__1::allocator > const&)', 'std::__1::vector , std::__1::allocator >, std::__1::allocator , std::__1::allocator > > >::clear[abi:ne180100]()', 'std::__1::basic_string , std::__1::allocator >::basic_string(std::__1::basic_string , std::__1::allocator > const&)', 'std::__1::basic_string , std::__1::allocator >::append(char const*)']

0 2713 HunspellImpl::spellml(std::__1::basic_string ,std::__1::allocator >const&) call site: 00000 /src/hunspell/src/hunspell/hunspell.cxx:1909
0 9 3 :

['std::__1::basic_string , std::__1::allocator >::assign(char const*)', 'reverseword_utf(std::__1::basic_string , std::__1::allocator >&)', 'reverseword(std::__1::basic_string , std::__1::allocator >&)']

0 9 HunspellImpl::checkword(std::__1::basic_string ,std::__1::allocator >const&,int*,std::__1::basic_string ,std::__1::allocator >*) call site: 00000 /src/hunspell/src/hunspell/hunspell.cxx:884
0 9 3 :

['std::__1::basic_string , std::__1::allocator >::assign(char const*)', 'reverseword_utf(std::__1::basic_string , std::__1::allocator >&)', 'reverseword(std::__1::basic_string , std::__1::allocator >&)']

0 9 HunspellImpl::checkword(std::__1::basic_string ,std::__1::allocator >const&,int*,std::__1::basic_string ,std::__1::allocator >*) call site: 00000 /src/hunspell/src/hunspell/hunspell.cxx:928
0 0 None 65 67 FileMgr::FileMgr(charconst*,charconst*) call site: 00000 /src/hunspell/src/hunspell/filemgr.cxx:86
0 0 None 38 30334 HunspellImpl::suggest_internal(std::__1::basic_string ,std::__1::allocator >const&,std::__1::vector ,std::__1::allocator >,std::__1::allocator ,std::__1::allocator >>>&,std::__1::vector ,std::__1::allocator >,std::__1::allocator ,std::__1::allocator >>>&,bool&,unsignedlong&,int&) call site: 00000 /src/hunspell/src/hunspell/hunspell.cxx:1100
0 0 None 20 59 phonet(std::__1::basic_string ,std::__1::allocator >const&,phonetable&) call site: 00000 /src/hunspell/src/hunspell/phonet.cxx:186
0 0 None 10 1772 SuggestMgr::ngsuggest(std::__1::vector ,std::__1::allocator >,std::__1::allocator ,std::__1::allocator >>>&,charconst*,std::__1::vector >const&,int) call site: 00000 /src/hunspell/src/hunspell/suggestmgr.cxx:1550
0 0 None 8 634 HashMgr::load_config(charconst*,charconst*) call site: 00000 /src/hunspell/src/hunspell/hashmgr.cxx:958
0 0 None 8 180 HashMgr::add_word(std::__1::basic_string ,std::__1::allocator >const&,int,unsignedshort*,int,std::__1::basic_string ,std::__1::allocator >const*,bool,int) call site: 00000 /src/hunspell/src/hunspell/hashmgr.cxx:225
0 0 None 6 6 FileMgr::FileMgr(charconst*,charconst*) call site: 00000 /src/hunspell/src/hunspell/filemgr.cxx:89

Runtime coverage analysis

Covered functions
292
Functions that are reachable but not covered
76
Reachable functions
487
Percentage of reachable functions covered
84.39%
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
/src/hunspell/./src/tools/fuzzer.cxx 1
/src/hunspell/src/hunspell/hunspell.cxx 34
/src/hunspell/src/hunspell/affixmgr.cxx 55
/src/hunspell/src/hunspell/replist.cxx 3
/src/hunspell/src/hunspell/csutil.cxx 40
/src/hunspell/src/hunspell/./atypes.hxx 1
/src/hunspell/src/hunspell/./w_char.hxx 2
/src/hunspell/src/hunspell/hashmgr.cxx 14
/src/hunspell/src/hunspell/./affentry.hxx 23
/src/hunspell/src/hunspell/affentry.cxx 14
/src/hunspell/src/hunspell/suggestmgr.cxx 43
/usr/local/bin/../include/c++/v1/stdlib.h 1
/src/hunspell/src/hunspell/./csutil.hxx 4
/src/hunspell/src/hunspell/phonet.cxx 3

Fuzzer: affdicfuzzer

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 0 503 25.4%
gold [1:9] 29 1.46%
yellow [10:29] 34 1.71%
greenyellow [30:49] 25 1.26%
lawngreen 50+ 1388 70.1%
All colors 1979 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
3044 6211 6 :

['uniqlist(std::__1::vector , std::__1::allocator >, std::__1::allocator , std::__1::allocator > > >&)', 'HunspellImpl::generate(std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&)', 'HunspellImpl::get_xml_list(std::__1::basic_string , std::__1::allocator > const&, unsigned long, char const*)', 'std::__1::vector , std::__1::allocator >, std::__1::allocator , std::__1::allocator > > >::empty[abi:ne180100]() const', 'std::__1::vector , std::__1::allocator >, std::__1::allocator , std::__1::allocator > > >::operator=[abi:ne180100](std::__1::vector , std::__1::allocator >, std::__1::allocator , std::__1::allocator > > >&&)', 'HunspellImpl::generate(std::__1::basic_string , std::__1::allocator > const&, std::__1::vector , std::__1::allocator >, std::__1::allocator , std::__1::allocator > > > const&)']

3044 6299 HunspellImpl::spellml(std::__1::basic_string ,std::__1::allocator >const&) call site: 00000 /src/hunspell/src/hunspell/hunspell.cxx:1936
0 3113 1 :

['HunspellImpl::stem(std::__1::basic_string , std::__1::allocator > const&)']

0 3157 HunspellImpl::spellml(std::__1::basic_string ,std::__1::allocator >const&) call site: 00000 /src/hunspell/src/hunspell/hunspell.cxx:1932
0 2669 14 :

['mystrrep(std::__1::basic_string , std::__1::allocator >&, std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&)', '_ZNSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEC2B8ne180100ILi0EEEPKc', 'std::__1::__wrap_iter , std::__1::allocator >*>::operator++[abi:ne180100]()', 'std::__1::basic_string , std::__1::allocator >::basic_string[abi:ne180100]()', 'bool std::__1::operator!=[abi:ne180100] , std::__1::allocator >*>(std::__1::__wrap_iter , std::__1::allocator >*> const&, std::__1::__wrap_iter , std::__1::allocator >*> const&)', 'std::__1::vector , std::__1::allocator >, std::__1::allocator , std::__1::allocator > > >::end[abi:ne180100]()', 'std::__1::vector , std::__1::allocator >, std::__1::allocator , std::__1::allocator > > >::begin[abi:ne180100]()', 'std::__1::__wrap_iter , std::__1::allocator >*>::operator*[abi:ne180100]() const', 'HunspellImpl::analyze(std::__1::basic_string , std::__1::allocator > const&)', 'std::__1::vector , std::__1::allocator >, std::__1::allocator , std::__1::allocator > > >::push_back[abi:ne180100](std::__1::basic_string , std::__1::allocator > const&)', 'std::__1::basic_string , std::__1::allocator >::append[abi:ne180100](std::__1::basic_string , std::__1::allocator > const&)', 'std::__1::vector , std::__1::allocator >, std::__1::allocator , std::__1::allocator > > >::clear[abi:ne180100]()', 'std::__1::basic_string , std::__1::allocator >::basic_string(std::__1::basic_string , std::__1::allocator > const&)', 'std::__1::basic_string , std::__1::allocator >::append(char const*)']

0 2713 HunspellImpl::spellml(std::__1::basic_string ,std::__1::allocator >const&) call site: 00000 /src/hunspell/src/hunspell/hunspell.cxx:1909
0 9 3 :

['std::__1::basic_string , std::__1::allocator >::assign(char const*)', 'reverseword_utf(std::__1::basic_string , std::__1::allocator >&)', 'reverseword(std::__1::basic_string , std::__1::allocator >&)']

0 9 HunspellImpl::checkword(std::__1::basic_string ,std::__1::allocator >const&,int*,std::__1::basic_string ,std::__1::allocator >*) call site: 00000 /src/hunspell/src/hunspell/hunspell.cxx:884
0 9 3 :

['std::__1::basic_string , std::__1::allocator >::assign(char const*)', 'reverseword_utf(std::__1::basic_string , std::__1::allocator >&)', 'reverseword(std::__1::basic_string , std::__1::allocator >&)']

0 9 HunspellImpl::checkword(std::__1::basic_string ,std::__1::allocator >const&,int*,std::__1::basic_string ,std::__1::allocator >*) call site: 00000 /src/hunspell/src/hunspell/hunspell.cxx:928
0 0 None 65 67 FileMgr::FileMgr(charconst*,charconst*) call site: 00000 /src/hunspell/src/hunspell/filemgr.cxx:86
0 0 None 38 30334 HunspellImpl::suggest_internal(std::__1::basic_string ,std::__1::allocator >const&,std::__1::vector ,std::__1::allocator >,std::__1::allocator ,std::__1::allocator >>>&,std::__1::vector ,std::__1::allocator >,std::__1::allocator ,std::__1::allocator >>>&,bool&,unsignedlong&,int&) call site: 00000 /src/hunspell/src/hunspell/hunspell.cxx:1100
0 0 None 20 59 phonet(std::__1::basic_string ,std::__1::allocator >const&,phonetable&) call site: 00000 /src/hunspell/src/hunspell/phonet.cxx:186
0 0 None 10 1772 SuggestMgr::ngsuggest(std::__1::vector ,std::__1::allocator >,std::__1::allocator ,std::__1::allocator >>>&,charconst*,std::__1::vector >const&,int) call site: 00000 /src/hunspell/src/hunspell/suggestmgr.cxx:1550
0 0 None 8 634 HashMgr::load_config(charconst*,charconst*) call site: 00000 /src/hunspell/src/hunspell/hashmgr.cxx:958
0 0 None 8 180 HashMgr::add_word(std::__1::basic_string ,std::__1::allocator >const&,int,unsignedshort*,int,std::__1::basic_string ,std::__1::allocator >const*,bool,int) call site: 00000 /src/hunspell/src/hunspell/hashmgr.cxx:225
0 0 None 6 6 FileMgr::FileMgr(charconst*,charconst*) call site: 00000 /src/hunspell/src/hunspell/filemgr.cxx:89

Runtime coverage analysis

Covered functions
292
Functions that are reachable but not covered
103
Reachable functions
692
Percentage of reachable functions covered
85.12%
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
/src/hunspell/./src/tools/affdicfuzzer.cxx 1
/src/hunspell/src/hunspell/hunspell.cxx 38
/src/hunspell/src/hunspell/hashmgr.cxx 28
/src/hunspell/src/hunspell/filemgr.cxx 5
/src/hunspell/src/hunspell/csutil.cxx 44
/src/hunspell/src/hunspell/hunzip.cxx 7
/src/hunspell/src/hunspell/./atypes.hxx 1
/src/hunspell/src/hunspell/./w_char.hxx 4
/src/hunspell/src/hunspell/./csutil.hxx 4
/src/hunspell/src/hunspell/affixmgr.cxx 98
/src/hunspell/src/hunspell/./affentry.hxx 31
/src/hunspell/src/hunspell/replist.cxx 7
/src/hunspell/src/hunspell/./phonet.hxx 2
/src/hunspell/src/hunspell/phonet.cxx 4
/src/hunspell/src/hunspell/affentry.cxx 17
/src/hunspell/src/hunspell/./baseaffix.hxx 1
/src/hunspell/src/hunspell/suggestmgr.cxx 45
/usr/local/bin/../include/c++/v1/stdlib.h 1

Fuzz engine guidance

This sections provides heuristics that can be used as input to a fuzz engine when running a given fuzz target. The current focus is on providing input that is usable by libFuzzer.

/src/hunspell/./src/tools/fuzzer.cxx

Dictionary

Use this with the libFuzzer -dict=DICT.file flag


Fuzzer function priority

Use one of these functions as input to libfuzzer with flag: -focus_function name

-focus_function=['HashMgr::encode_flag(unsigned short) const', 'HunspellImpl::spellml(std::__1::basic_string, std::__1::allocator > const&)', 'SfxEntry::add(char const*, unsigned long)', 'HENTRY_FIND(hentry*, char const*)', 'HunspellImpl::spellml(std::__1::basic_string, std::__1::allocator > const&)', 'HunspellImpl::get_xml_par(std::__1::basic_string, std::__1::allocator > const&, unsigned long)', 'HunspellImpl::spellml(std::__1::basic_string, std::__1::allocator > const&)', 'HunspellImpl::mkinitcap(std::__1::basic_string, std::__1::allocator >&)', 'HashMgr::add_hidden_capitalized_word(std::__1::basic_string, std::__1::allocator > const&, int, unsigned short*, int, std::__1::basic_string, std::__1::allocator > const*, int)', 'HunspellImpl::checkword(std::__1::basic_string, std::__1::allocator > const&, int*, std::__1::basic_string, std::__1::allocator >*)']

/src/hunspell/./src/tools/affdicfuzzer.cxx

Dictionary

Use this with the libFuzzer -dict=DICT.file flag


Fuzzer function priority

Use one of these functions as input to libfuzzer with flag: -focus_function name

-focus_function=['HunspellImpl::get_xml_par(std::__1::basic_string, std::__1::allocator > const&, unsigned long)', 'HunspellImpl::spellml(std::__1::basic_string, std::__1::allocator > const&)', 'SfxEntry::add(char const*, unsigned long)', 'HunspellImpl::spellml(std::__1::basic_string, std::__1::allocator > const&)', 'FileMgr::FileMgr(char const*, char const*)', 'HunspellImpl::spellml(std::__1::basic_string, std::__1::allocator > const&)', 'FileMgr::getline(std::__1::basic_string, std::__1::allocator >&)', 'HunspellImpl::mkinitcap(std::__1::basic_string, std::__1::allocator >&)', 'FileMgr::FileMgr(char const*, char const*)', 'HashMgr::load_tables(char const*, char const*)']

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
[] []
/src/hunspell/src/hunspell/./phonet.hxx ['affdicfuzzer'] []
/src/hunspell/src/hunspell/hunzip.cxx ['affdicfuzzer'] ['affdicfuzzer']
/src/hunspell/src/hunspell/./affentry.hxx ['fuzzer', 'affdicfuzzer'] []
/src/hunspell/src/hunspell/affentry.cxx ['fuzzer', 'affdicfuzzer'] ['fuzzer', 'affdicfuzzer']
/usr/local/bin/../include/c++/v1/string [] []
/src/hunspell/src/hunspell/suggestmgr.cxx ['fuzzer', 'affdicfuzzer'] ['fuzzer', 'affdicfuzzer']
/src/hunspell/./src/tools/fuzzer.cxx ['fuzzer'] []
/usr/local/bin/../include/c++/v1/sstream [] []
/src/hunspell/src/hunspell/csutil.cxx ['fuzzer', 'affdicfuzzer'] ['fuzzer', 'affdicfuzzer']
/src/hunspell/src/tools/fuzzer.cxx [] []
/src/hunspell/src/hunspell/./csutil.hxx ['fuzzer', 'affdicfuzzer'] []
/usr/local/bin/../include/c++/v1/stdlib.h ['fuzzer', 'affdicfuzzer'] []
/src/hunspell/src/hunspell/hashmgr.cxx ['fuzzer', 'affdicfuzzer'] ['fuzzer', 'affdicfuzzer']
/src/hunspell/src/hunspell/hunspell.cxx ['fuzzer', 'affdicfuzzer'] ['fuzzer', 'affdicfuzzer']
/src/hunspell/src/hunspell/replist.cxx ['fuzzer', 'affdicfuzzer'] ['fuzzer', 'affdicfuzzer']
/src/hunspell/./src/tools/affdicfuzzer.cxx ['affdicfuzzer'] []
/src/hunspell/src/hunspell/phonet.cxx ['fuzzer', 'affdicfuzzer'] ['fuzzer', 'affdicfuzzer']
/src/hunspell/src/hunspell/filemgr.cxx ['affdicfuzzer'] ['affdicfuzzer']
/usr/local/bin/../include/c++/v1/stdexcept [] []
/src/hunspell/src/hunspell/./baseaffix.hxx ['affdicfuzzer'] []
/src/hunspell/src/hunspell/./atypes.hxx ['fuzzer', 'affdicfuzzer'] []
/src/hunspell/src/hunspell/affixmgr.cxx ['fuzzer', 'affdicfuzzer'] ['fuzzer', 'affdicfuzzer']
/src/hunspell/src/hunspell/./w_char.hxx ['fuzzer', 'affdicfuzzer'] []

Directories in report

Directory
/src/hunspell/src/hunspell/./
/src/hunspell/src/tools/
/src/hunspell/./src/tools/
/usr/local/bin/../include/c++/v1/
/src/hunspell/src/hunspell/