Fuzz introspector
For issues and ideas: https://github.com/ossf/fuzz-introspector/issues
Project coverage
Per-fuzzer coverage

Table of contents

Project overview: uwebsockets
High level conclusions
Reachability and coverage overview
Fuzzers overview
Project functions overview
Fuzzer details
Fuzzer: Extensions
Call tree
Fuzz blockers
Runtime coverage analysis
Files reached
Fuzzer: PerMessageDeflate
Call tree
Runtime coverage analysis
Files reached
Fuzzer: MultipartParser
Call tree
Fuzz blockers
Runtime coverage analysis
Files reached
Fuzzer: QueryParser
Call tree
Runtime coverage analysis
Files reached
Fuzzer: TopicTree
Call tree
Fuzz blockers
Runtime coverage analysis
Files reached
Fuzzer: WebSocket
Call tree
Fuzz blockers
Runtime coverage analysis
Files reached
Fuzzer: Http
Call tree
Fuzz blockers
Runtime coverage analysis
Files reached
Fuzzer: HttpWithProxy
Call tree
Fuzz blockers
Runtime coverage analysis
Files reached
Fuzzer: AsyncEpollHelloWorld
Call tree
Fuzz blockers
Runtime coverage analysis
Files reached
Fuzzer: EpollEchoServer
Call tree
Fuzz blockers
Runtime coverage analysis
Files reached
Fuzzer: EpollEchoServerPubSub
Call tree
Fuzz blockers
Runtime coverage analysis
Files reached
Fuzzer: EpollHelloWorld
Call tree
Fuzz blockers
Runtime coverage analysis
Files reached
Analyses and suggestions
Optimal target analysis
Remaining optimal interesting functions
All functions overview
Fuzz engine guidance
/src/uWebSockets/fuzzing/Extensions.cpp
Dictionary
Fuzzer function priority
/src/uWebSockets/fuzzing/PerMessageDeflate.cpp
Dictionary
Fuzzer function priority
/src/uWebSockets/fuzzing/MultipartParser.cpp
Dictionary
Fuzzer function priority
/src/uWebSockets/fuzzing/QueryParser.cpp
Dictionary
Fuzzer function priority
/src/uWebSockets/fuzzing/TopicTree.cpp
Dictionary
Fuzzer function priority
/src/uWebSockets/fuzzing/WebSocket.cpp
Dictionary
Fuzzer function priority
/src/uWebSockets/fuzzing/Http.cpp
Dictionary
Fuzzer function priority
/src/uWebSockets/fuzzing/Http.cpp
Dictionary
Fuzzer function priority
/src/uWebSockets/fuzzing/./libEpollFuzzer/epoll_fuzzer.h
Dictionary
Fuzzer function priority
/src/uWebSockets/fuzzing/./libEpollFuzzer/epoll_fuzzer.h
Dictionary
Fuzzer function priority
/src/uWebSockets/fuzzing/./libEpollFuzzer/epoll_fuzzer.h
Dictionary
Fuzzer function priority
/src/uWebSockets/fuzzing/./libEpollFuzzer/epoll_fuzzer.h
Dictionary
Fuzzer function priority
Runtime coverage analysis
Complex functions with low coverage
Files and Directories in report
Files in report
Directories in report
Metadata section
Sink analyser for CWEs
Report generation date: 2024-04-25

Project overview: uwebsockets

High level conclusions

Reachability and coverage overview

Functions statically reachable by fuzzers
31.0%
507 / 1649
Cyclomatic complexity statically reachable by fuzzers
36.0%
2244 / 6318
Runtime code coverage of functions
79.0%
1297 / 1649

Warning: The number of runtime covered functions are larger than the number of reachable functions. This means that Fuzz Introspector found there are more functions covered at runtime than what is considered reachable based on the static analysis. This is a limitation in the analysis as anything covered at runtime is by definition reachable by the fuzzers.
This is likely due to a limitation in the static analysis. In this case, the count of functions covered at runtime is the true value, which means this is what should be considered "achieved" by the fuzzer.

Use the project functions table below to query all functions that were not covered at runtime.

Fuzzers overview

Fuzzer Fuzzer filename Functions Reached Functions unreached Fuzzer depth Files reached Basic blocks reached Cyclomatic complexity Details
Extensions /src/uWebSockets/fuzzing/Extensions.cpp 10 4 5 3 161 53 Extensions.cpp
PerMessageDeflate /src/uWebSockets/fuzzing/PerMessageDeflate.cpp 10 19 2 3 28 23 PerMessageDeflate.cpp
MultipartParser /src/uWebSockets/fuzzing/MultipartParser.cpp 24 15 4 5 150 73 MultipartParser.cpp
QueryParser /src/uWebSockets/fuzzing/QueryParser.cpp 3 16 1 2 54 23 QueryParser.cpp
TopicTree /src/uWebSockets/fuzzing/TopicTree.cpp 19 33 2 3 76 46 TopicTree.cpp
WebSocket /src/uWebSockets/fuzzing/WebSocket.cpp 11 57 2 3 25 19 WebSocket.cpp
Http /src/uWebSockets/fuzzing/Http.cpp 11 171 2 3 31 21 Http.cpp
HttpWithProxy /src/uWebSockets/fuzzing/Http.cpp 13 174 2 4 32 23 Http.cpp
AsyncEpollHelloWorld /src/uWebSockets/fuzzing/./libEpollFuzzer/epoll_fuzzer.h 198 463 10 14 674 528 epoll_fuzzer.h
EpollEchoServer /src/uWebSockets/fuzzing/./libEpollFuzzer/epoll_fuzzer.h 583 734 10 17 1902 1257 epoll_fuzzer.h
EpollEchoServerPubSub /src/uWebSockets/fuzzing/./libEpollFuzzer/epoll_fuzzer.h 556 703 10 17 1803 1200 epoll_fuzzer.h
EpollHelloWorld /src/uWebSockets/fuzzing/./libEpollFuzzer/epoll_fuzzer.h 619 739 10 19 2041 1358 epoll_fuzzer.h

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 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: Extensions

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

Full calltree

Call tree overview bitmap:

The distribution of callsites in terms of coloring is
Color Runtime hitcount Callsite count Percentage
red 0 1 9.09%
gold [1:9] 0 0.0%
yellow [10:29] 0 0.0%
greenyellow [30:49] 0 0.0%
lawngreen 50+ 10 90.9%
All colors 11 100

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 4 :

['std::__1::basic_string , std::__1::allocator > std::__1::operator+ , std::__1::allocator >(char const*, std::__1::basic_string , std::__1::allocator >&&)', 'std::__1::to_string(int)', 'std::__1::basic_string , std::__1::allocator >::operator+=(std::__1::basic_string , std::__1::allocator > const&)', 'std::__1::basic_string , std::__1::allocator >::~basic_string()']

0 0 uWS::negotiateCompression(bool,int,int,std::__1::basic_string_view >) call site: 00000 /src/uWebSockets/fuzzing/./../src/WebSocketExtensions.h:192
0 0 None 0 0 uWS::negotiateCompression(bool,int,int,std::__1::basic_string_view >) call site: 00000 /src/uWebSockets/fuzzing/./../src/WebSocketExtensions.h:211

Runtime coverage analysis

Covered functions
4
Functions that are reachable but not covered
3
Reachable functions
10
Percentage of reachable functions covered
70.0%
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/uWebSockets/fuzzing/Extensions.cpp 1
/src/uWebSockets/fuzzing/./../src/WebSocketExtensions.h 3
/usr/include/ctype.h 1

Fuzzer: PerMessageDeflate

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

Full calltree

Call tree overview bitmap:

The distribution of callsites in terms of coloring is
Color Runtime hitcount Callsite count Percentage
red 0 0 0.0%
gold [1:9] 0 0.0%
yellow [10:29] 0 0.0%
greenyellow [30:49] 0 0.0%
lawngreen 50+ 5 100.%
All colors 5 100

Runtime coverage analysis

Covered functions
9
Functions that are reachable but not covered
3
Reachable functions
10
Percentage of reachable functions covered
70.0%
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/uWebSockets/fuzzing/PerMessageDeflate.cpp 1
/src/uWebSockets/fuzzing/./../src/PerMessageDeflate.h 1
/src/uWebSockets/fuzzing/./helpers.h 1

Fuzzer: MultipartParser

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

Full calltree

Call tree overview bitmap:

The distribution of callsites in terms of coloring is
Color Runtime hitcount Callsite count Percentage
red 0 2 11.1%
gold [1:9] 0 0.0%
yellow [10:29] 0 0.0%
greenyellow [30:49] 0 0.0%
lawngreen 50+ 16 88.8%
All colors 18 100

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked Calltree index Parent function Callsite Largest blocked function
1 7 LLVMFuzzerTestOneInput call site: 00007
1 12 uWS::ParameterParser::getToken() call site: 00012 __ctype_b_loc

Runtime coverage analysis

Covered functions
9
Functions that are reachable but not covered
7
Reachable functions
24
Percentage of reachable functions covered
70.83%
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/uWebSockets/fuzzing/MultipartParser.cpp 1
/src/uWebSockets/fuzzing/./../src/Multipart.h 7
/src/uWebSockets/fuzzing/./../src/MessageParser.h 1
/usr/local/bin/../include/c++/v1/optional 2
/usr/include/ctype.h 1

Fuzzer: QueryParser

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

Full calltree

Call tree overview bitmap:

The distribution of callsites in terms of coloring is
Color Runtime hitcount Callsite count Percentage
red 0 0 0.0%
gold [1:9] 0 0.0%
yellow [10:29] 0 0.0%
greenyellow [30:49] 0 0.0%
lawngreen 50+ 3 100.%
All colors 3 100

Runtime coverage analysis

Covered functions
2
Functions that are reachable but not covered
0
Reachable functions
3
Percentage of reachable functions covered
100.0%
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/uWebSockets/fuzzing/QueryParser.cpp 1
/src/uWebSockets/fuzzing/./../src/QueryParser.h 1

Fuzzer: TopicTree

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

Full calltree

Call tree overview bitmap:

The distribution of callsites in terms of coloring is
Color Runtime hitcount Callsite count Percentage
red 0 0 0.0%
gold [1:9] 0 0.0%
yellow [10:29] 0 0.0%
greenyellow [30:49] 0 0.0%
lawngreen 50+ 9 100.%
All colors 9 100

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 3 :

['std::__1::basic_ostream >& std::__1::operator<< >(std::__1::basic_ostream >&, char const*)', 'std::terminate()', 'std::__1::basic_ostream >::operator<<(std::__1::basic_ostream >& (*)(std::__1::basic_ostream >&))']

0 0 uWS::TopicTree ,std::__1::allocator >,std::__1::basic_string_view >>::checkIteratingSubscriber(uWS::Subscriber*) call site: 00000 /src/uWebSockets/fuzzing/./../src/TopicTree.h:106

Runtime coverage analysis

Covered functions
20
Functions that are reachable but not covered
7
Reachable functions
19
Percentage of reachable functions covered
63.16%
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
/src/uWebSockets/fuzzing/TopicTree.cpp 1
/src/uWebSockets/fuzzing/./../src/TopicTree.h 6
/src/uWebSockets/fuzzing/./helpers.h 1

Fuzzer: WebSocket

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

Full calltree

Call tree overview bitmap:

The distribution of callsites in terms of coloring is
Color Runtime hitcount Callsite count Percentage
red 0 1 20.0%
gold [1:9] 0 0.0%
yellow [10:29] 0 0.0%
greenyellow [30:49] 0 0.0%
lawngreen 50+ 4 80.0%
All colors 5 100

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
35 35 1 :

['uWS::WebSocketProtocol ::unmaskAll(char*, char*)']

35 83 uWS::WebSocketProtocol ::consumeContinuation(char*&,unsignedint&,uWS::WebSocketState *,void*) call site: 00000 /src/uWebSockets/fuzzing/./../src/WebSocketProtocol.h:432
0 2 1 :

['Impl::forceClose(uWS::WebSocketState *, void*, std::__1::basic_string_view >)']

0 2 booluWS::WebSocketProtocol ::consumeMessage<6u,unsignedchar>(unsignedchar,char*&,unsignedint&,uWS::WebSocketState *,void*) call site: 00000 /src/uWebSockets/fuzzing/./../src/WebSocketProtocol.h:353

Runtime coverage analysis

Covered functions
34
Functions that are reachable but not covered
5
Reachable functions
11
Percentage of reachable functions covered
54.55%
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
/src/uWebSockets/fuzzing/WebSocket.cpp 1
/src/uWebSockets/fuzzing/./../src/WebSocketProtocol.h 2
/src/uWebSockets/fuzzing/./helpers.h 1

Fuzzer: Http

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

Full calltree

Call tree overview bitmap:

The distribution of callsites in terms of coloring is
Color Runtime hitcount Callsite count Percentage
red 0 0 0.0%
gold [1:9] 0 0.0%
yellow [10:29] 0 0.0%
greenyellow [30:49] 0 0.0%
lawngreen 50+ 5 100.%
All colors 5 100

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
24 24 5 :

['std::__1::__wrap_iter *)>*>::operator+(long) const', '_ZNSt3__111__wrap_iterIPKN5ofats13any_invocableIFbPN3uWS10HttpRouterIN10StaticData10RouterDataEEEEEEEC2IPSA_EERKNS0_IT_EEPNS_9enable_ifIXsr14is_convertibleISG_SC_EE5valueEvE4typeE', 'std::__1::vector *)>, std::__1::allocator *)> > >::begin()', 'uWS::HttpRouter ::cullNode(uWS::HttpRouter ::Node*, uWS::HttpRouter ::Node*, unsigned int)', 'std::__1::vector *)>, std::__1::allocator *)> > >::erase(std::__1::__wrap_iter *)> const*>)']

24 24 uWS::HttpRouter ::remove(std::__1::basic_string ,std::__1::allocator >,std::__1::basic_string ,std::__1::allocator >,unsignedint) call site: 00000 /src/uWebSockets/fuzzing/./../src/HttpRouter.h:362
2 2 1 :

['exit']

2 2 autoStaticData::StaticData()::{lambda(auto:1*)#1}::operator() >(uWS::HttpRouter *) call site: 00000 /src/uWebSockets/fuzzing/Http.cpp:30
2 2 1 :

['exit']

2 2 autoStaticData::StaticData()::{lambda(auto:1*)#2}::operator() >(uWS::HttpRouter *) call site: 00000 /src/uWebSockets/fuzzing/Http.cpp:42
0 12 12 :

['std::__1::__wrap_iter ::Node, std::__1::default_delete ::Node> >*>::operator*() const', 'std::__1::unique_ptr ::Node, std::__1::default_delete ::Node> >::operator->() const', 'std::__1::__wrap_iter ::Node, std::__1::default_delete ::Node> >*>::operator++()', 'std::__1::vector >::size() const', 'std::__1::vector ::Node, std::__1::default_delete ::Node> >, std::__1::allocator ::Node, std::__1::default_delete ::Node> > > >::begin()', 'std::__1::vector ::Node, std::__1::default_delete ::Node> >, std::__1::allocator ::Node, std::__1::default_delete ::Node> > > >::end()', 'uWS::HttpRouter ::getUrlSegment(int)', 'std::__1::vector >::operator[](unsigned long)', 'bool std::__1::operator!= ::Node, std::__1::default_delete ::Node> >*>(std::__1::__wrap_iter ::Node, std::__1::default_delete ::Node> >*> const&, std::__1::__wrap_iter ::Node, std::__1::default_delete ::Node> >*> const&)', 'bool std::__1::operator== >(std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&)', 'std::__1::unique_ptr ::Node, std::__1::default_delete ::Node> >::get() const', 'std::__1::basic_string , std::__1::allocator >::basic_string >, void>(std::__1::basic_string_view > const&)']

0 12 uWS::HttpRouter ::findHandler(std::__1::basic_string ,std::__1::allocator >,std::__1::basic_string ,std::__1::allocator >,unsignedint) call site: 00000 /src/uWebSockets/fuzzing/./../src/HttpRouter.h:225
0 0 None 4 4 uWS::ChunkIterator::operator*() call site: 00000 /src/uWebSockets/fuzzing/./../src/ChunkedEncoding.h:218
0 0 None 0 10 autouWS::HttpRouter ::getNode(uWS::HttpRouter ::Node*,std::__1::basic_string ,std::__1::allocator >,bool)::{lambda(auto:1&,auto:2&)#1}::operator() ::Node,std::__1::default_delete ::Node>>const,std::__1::default_delete ::Node>>(std::__1::unique_ptr ::Node,std::__1::default_delete ::Node>>const&,std::__1::default_delete ::Node>&)const call site: 00000 /src/uWebSockets/fuzzing/./../src/HttpRouter.h:93
0 0 None 0 0 std::__1::pair uWS::HttpParser::fenceAndConsumePostPadded<1>(char*,unsignedint,void*,void*,uWS::HttpRequest*,ofats::any_invocable &,ofats::any_invocable >,bool)>&) call site: 00000 /src/uWebSockets/fuzzing/./../src/HttpParser.h:465
0 0 None 0 0 autoStaticData::StaticData()::{lambda(auto:1*)#3}::operator() >(uWS::HttpRouter *) call site: 00000 /src/uWebSockets/fuzzing/Http.cpp:54
0 0 None 0 0 autoStaticData::StaticData()::{lambda(auto:1*)#4}::operator() >(uWS::HttpRouter *) call site: 00000 /src/uWebSockets/fuzzing/Http.cpp:66

Runtime coverage analysis

Covered functions
128
Functions that are reachable but not covered
7
Reachable functions
11
Percentage of reachable functions covered
36.36%
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
/src/uWebSockets/fuzzing/Http.cpp 1
/src/uWebSockets/fuzzing/./../src/HttpParser.h 2
/src/uWebSockets/fuzzing/./helpers.h 1

Fuzzer: HttpWithProxy

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

Full calltree

Call tree overview bitmap:

The distribution of callsites in terms of coloring is
Color Runtime hitcount Callsite count Percentage
red 0 0 0.0%
gold [1:9] 0 0.0%
yellow [10:29] 0 0.0%
greenyellow [30:49] 0 0.0%
lawngreen 50+ 6 100.%
All colors 6 100

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
24 24 5 :

['std::__1::__wrap_iter *)>*>::operator+(long) const', '_ZNSt3__111__wrap_iterIPKN5ofats13any_invocableIFbPN3uWS10HttpRouterIN10StaticData10RouterDataEEEEEEEC2IPSA_EERKNS0_IT_EEPNS_9enable_ifIXsr14is_convertibleISG_SC_EE5valueEvE4typeE', 'std::__1::vector *)>, std::__1::allocator *)> > >::begin()', 'uWS::HttpRouter ::cullNode(uWS::HttpRouter ::Node*, uWS::HttpRouter ::Node*, unsigned int)', 'std::__1::vector *)>, std::__1::allocator *)> > >::erase(std::__1::__wrap_iter *)> const*>)']

24 24 uWS::HttpRouter ::remove(std::__1::basic_string ,std::__1::allocator >,std::__1::basic_string ,std::__1::allocator >,unsignedint) call site: 00000 /src/uWebSockets/fuzzing/./../src/HttpRouter.h:362
2 2 1 :

['exit']

2 2 autoStaticData::StaticData()::{lambda(auto:1*)#1}::operator() >(uWS::HttpRouter *) call site: 00000 /src/uWebSockets/fuzzing/Http.cpp:30
2 2 1 :

['exit']

2 2 autoStaticData::StaticData()::{lambda(auto:1*)#2}::operator() >(uWS::HttpRouter *) call site: 00000 /src/uWebSockets/fuzzing/Http.cpp:42
0 12 12 :

['std::__1::__wrap_iter ::Node, std::__1::default_delete ::Node> >*>::operator*() const', 'std::__1::unique_ptr ::Node, std::__1::default_delete ::Node> >::operator->() const', 'std::__1::__wrap_iter ::Node, std::__1::default_delete ::Node> >*>::operator++()', 'std::__1::vector >::size() const', 'std::__1::vector ::Node, std::__1::default_delete ::Node> >, std::__1::allocator ::Node, std::__1::default_delete ::Node> > > >::begin()', 'std::__1::vector ::Node, std::__1::default_delete ::Node> >, std::__1::allocator ::Node, std::__1::default_delete ::Node> > > >::end()', 'uWS::HttpRouter ::getUrlSegment(int)', 'std::__1::vector >::operator[](unsigned long)', 'bool std::__1::operator!= ::Node, std::__1::default_delete ::Node> >*>(std::__1::__wrap_iter ::Node, std::__1::default_delete ::Node> >*> const&, std::__1::__wrap_iter ::Node, std::__1::default_delete ::Node> >*> const&)', 'bool std::__1::operator== >(std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&)', 'std::__1::unique_ptr ::Node, std::__1::default_delete ::Node> >::get() const', 'std::__1::basic_string , std::__1::allocator >::basic_string >, void>(std::__1::basic_string_view > const&)']

0 12 uWS::HttpRouter ::findHandler(std::__1::basic_string ,std::__1::allocator >,std::__1::basic_string ,std::__1::allocator >,unsignedint) call site: 00000 /src/uWebSockets/fuzzing/./../src/HttpRouter.h:225
0 0 None 4 4 uWS::ChunkIterator::operator*() call site: 00000 /src/uWebSockets/fuzzing/./../src/ChunkedEncoding.h:218
0 0 None 0 10 autouWS::HttpRouter ::getNode(uWS::HttpRouter ::Node*,std::__1::basic_string ,std::__1::allocator >,bool)::{lambda(auto:1&,auto:2&)#1}::operator() ::Node,std::__1::default_delete ::Node>>const,std::__1::default_delete ::Node>>(std::__1::unique_ptr ::Node,std::__1::default_delete ::Node>>const&,std::__1::default_delete ::Node>&)const call site: 00000 /src/uWebSockets/fuzzing/./../src/HttpRouter.h:93
0 0 None 0 0 std::__1::pair uWS::HttpParser::fenceAndConsumePostPadded<1>(char*,unsignedint,void*,void*,uWS::HttpRequest*,ofats::any_invocable &,ofats::any_invocable >,bool)>&) call site: 00000 /src/uWebSockets/fuzzing/./../src/HttpParser.h:465
0 0 None 0 0 autoStaticData::StaticData()::{lambda(auto:1*)#3}::operator() >(uWS::HttpRouter *) call site: 00000 /src/uWebSockets/fuzzing/Http.cpp:54
0 0 None 0 0 autoStaticData::StaticData()::{lambda(auto:1*)#4}::operator() >(uWS::HttpRouter *) call site: 00000 /src/uWebSockets/fuzzing/Http.cpp:66

Runtime coverage analysis

Covered functions
131
Functions that are reachable but not covered
9
Reachable functions
13
Percentage of reachable functions covered
30.77%
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
/src/uWebSockets/fuzzing/Http.cpp 1
/src/uWebSockets/fuzzing/./../src/HttpParser.h 2
/src/uWebSockets/fuzzing/./../src/ProxyParser.h 1
/src/uWebSockets/fuzzing/./helpers.h 1

Fuzzer: AsyncEpollHelloWorld

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

Full calltree

Call tree overview bitmap:

The distribution of callsites in terms of coloring is
Color Runtime hitcount Callsite count Percentage
red 0 18 11.1%
gold [1:9] 1 0.62%
yellow [10:29] 1 0.62%
greenyellow [30:49] 0 0.0%
lawngreen 50+ 141 87.5%
All colors 161 100

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
108 108 9 :

['uWS::isParsingInvalidChunkedEncoding(unsigned long)', 'std::__1::basic_string_view >::data() const', 'uWS::ChunkIterator::ChunkIterator(std::__1::basic_string_view >*, unsigned long*, bool)', 'uWS::ChunkIterator::operator*()', 'uWS::ChunkIterator::end()', 'std::__1::basic_string_view >::length() const', 'uWS::ChunkIterator::operator!=(uWS::ChunkIterator const&) const', 'uWS::ChunkIterator::begin()', 'uWS::ChunkIterator::operator++()']

108 267 uWS::HttpParser::consumePostPadded(char*,unsignedint,void*,void*,ofats::any_invocable &&,ofats::any_invocable >,bool)>&&) call site: 00000 /src/uWebSockets/fuzzing/./../src/HttpParser.h:592
108 108 9 :

['uWS::isParsingInvalidChunkedEncoding(unsigned long)', 'std::__1::basic_string_view >::data() const', 'uWS::ChunkIterator::ChunkIterator(std::__1::basic_string_view >*, unsigned long*, bool)', 'uWS::ChunkIterator::operator*()', 'uWS::ChunkIterator::end()', 'std::__1::basic_string_view >::length() const', 'uWS::ChunkIterator::operator!=(uWS::ChunkIterator const&) const', 'uWS::ChunkIterator::begin()', 'uWS::ChunkIterator::operator++()']

108 267 uWS::HttpParser::consumePostPadded(char*,unsignedint,void*,void*,ofats::any_invocable &&,ofats::any_invocable >,bool)>&&) call site: 00000 /src/uWebSockets/fuzzing/./../src/HttpParser.h:649
58 60 2 :

['uWS::HttpResponseData ::callOnWritable(unsigned long)', 'us_socket_timeout']

58 60 uWS::HttpContext ::init()::{lambda(us_socket_t*)#1}::operator()(us_socket_t*)const call site: 00000 /src/uWebSockets/fuzzing/../src/HttpContext.h:331
24 41 5 :

['us_internal_poll_set_type', 'us_socket_close_connecting', 'us_socket_timeout', 'bsd_socket_nodelay', 'us_poll_change']

24 43 us_internal_dispatch_ready_poll call site: 00000 /src/uWebSockets/fuzzing/../uSockets/src/loop.c:242
24 24 5 :

['std::__1::vector ::RouterData>*)>, std::__1::allocator ::RouterData>*)> > >::begin()', '_ZNSt3__111__wrap_iterIPKN5ofats13any_invocableIFbPN3uWS10HttpRouterINS3_15HttpContextDataILb0EE10RouterDataEEEEEEEC2IPSB_EERKNS0_IT_EEPNS_9enable_ifIXsr14is_convertibleISH_SD_EE5valueEvE4typeE', 'std::__1::vector ::RouterData>*)>, std::__1::allocator ::RouterData>*)> > >::erase(std::__1::__wrap_iter ::RouterData>*)> const*>)', 'uWS::HttpRouter ::RouterData>::cullNode(uWS::HttpRouter ::RouterData>::Node*, uWS::HttpRouter ::RouterData>::Node*, unsigned int)', 'std::__1::__wrap_iter ::RouterData>*)>*>::operator+(long) const']

24 24 uWS::HttpRouter ::RouterData>::remove(std::__1::basic_string ,std::__1::allocator >,std::__1::basic_string ,std::__1::allocator >,unsignedint) call site: 00000 /src/uWebSockets/fuzzing/../src/HttpRouter.h:362
2 4 2 :

['uWS::BackPressure::length()', 'uWS::BackPressure::reserve(unsigned long)']

2 6 uWS::AsyncSocket ::write(charconst*,int,bool,int) call site: 00000 /src/uWebSockets/fuzzing/../src/AsyncSocket.h:307
2 2 1 :

['exit']

2 2 teardown() call site: 00000 /src/uWebSockets/fuzzing/AsyncEpollHelloWorld.cpp:49
2 2 1 :

['__real_read']

2 2 __wrap_read call site: 00000 /src/uWebSockets/fuzzing/./libEpollFuzzer/epoll_fuzzer.h:334
2 2 1 :

['__real_close']

2 2 __wrap_close call site: 00000 /src/uWebSockets/fuzzing/./libEpollFuzzer/epoll_fuzzer.h:680
0 12 12 :

['std::__1::unique_ptr ::RouterData>::Node, std::__1::default_delete ::RouterData>::Node> >::operator->() const', 'std::__1::vector ::RouterData>::Node, std::__1::default_delete ::RouterData>::Node> >, std::__1::allocator ::RouterData>::Node, std::__1::default_delete ::RouterData>::Node> > > >::end()', 'std::__1::unique_ptr ::RouterData>::Node, std::__1::default_delete ::RouterData>::Node> >::get() const', 'std::__1::vector >::size() const', 'std::__1::__wrap_iter ::RouterData>::Node, std::__1::default_delete ::RouterData>::Node> >*>::operator*() const', 'std::__1::vector >::operator[](unsigned long)', 'bool std::__1::operator== >(std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&)', 'std::__1::vector ::RouterData>::Node, std::__1::default_delete ::RouterData>::Node> >, std::__1::allocator ::RouterData>::Node, std::__1::default_delete ::RouterData>::Node> > > >::begin()', 'uWS::HttpRouter ::RouterData>::getUrlSegment(int)', 'std::__1::basic_string , std::__1::allocator >::basic_string >, void>(std::__1::basic_string_view > const&)', 'bool std::__1::operator!= ::RouterData>::Node, std::__1::default_delete ::RouterData>::Node> >*>(std::__1::__wrap_iter ::RouterData>::Node, std::__1::default_delete ::RouterData>::Node> >*> const&, std::__1::__wrap_iter ::RouterData>::Node, std::__1::default_delete ::RouterData>::Node> >*> const&)', 'std::__1::__wrap_iter ::RouterData>::Node, std::__1::default_delete ::RouterData>::Node> >*>::operator++()']

0 12 uWS::HttpRouter ::RouterData>::findHandler(std::__1::basic_string ,std::__1::allocator >,std::__1::basic_string ,std::__1::allocator >,unsignedint) call site: 00000 /src/uWebSockets/fuzzing/../src/HttpRouter.h:225
0 0 None 110 249 std::__1::pair uWS::HttpParser::fenceAndConsumePostPadded<0>(char*,unsignedint,void*,void*,uWS::HttpRequest*,ofats::any_invocable &,ofats::any_invocable >,bool)>&) call site: 00000 /src/uWebSockets/fuzzing/./../src/HttpParser.h:490
0 0 None 110 249 std::__1::pair uWS::HttpParser::fenceAndConsumePostPadded<0>(char*,unsignedint,void*,void*,uWS::HttpRequest*,ofats::any_invocable &,ofats::any_invocable >,bool)>&) call site: 00000 /src/uWebSockets/fuzzing/./../src/HttpParser.h:519

Runtime coverage analysis

Covered functions
337
Functions that are reachable but not covered
50
Reachable functions
198
Percentage of reachable functions covered
74.75%
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
/src/uWebSockets/fuzzing/./libEpollFuzzer/epoll_fuzzer.h 2
/src/uWebSockets/fuzzing/AsyncEpollHelloWorld.cpp 1
/src/uWebSockets/fuzzing/../src/App.h 7
/src/uWebSockets/fuzzing/../src/Loop.h 8
/src/uWebSockets/fuzzing/../uSockets/src/loop.c 5
/src/uWebSockets/fuzzing/../uSockets/src/eventing/epoll_kqueue.c 17
/src/uWebSockets/fuzzing/../src/LoopData.h 1
/src/uWebSockets/fuzzing/../src/MoveOnlyFunction.h 13
/src/uWebSockets/fuzzing/../src/HttpContext.h 8
/src/uWebSockets/fuzzing/../uSockets/src/context.c 12
/src/uWebSockets/fuzzing/../src/HttpContextData.h 2
/src/uWebSockets/fuzzing/../src/HttpRouter.h 11
/src/uWebSockets/fuzzing/../uSockets/src/bsd.c 4
/src/uWebSockets/fuzzing/../src/TopicTree.h 1

Fuzzer: EpollEchoServer

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

Full calltree

Call tree overview bitmap:

The distribution of callsites in terms of coloring is
Color Runtime hitcount Callsite count Percentage
red 0 25 10.3%
gold [1:9] 1 0.41%
yellow [10:29] 1 0.41%
greenyellow [30:49] 0 0.0%
lawngreen 50+ 214 88.7%
All colors 241 100

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
176 176 1 :

['bool uWS::TopicTree ::publishBig ::publish(std::__1::basic_string_view >, std::__1::basic_string_view >, uWS::OpCode, bool)::{lambda(uWS::Subscriber*, uWS::TopicTreeBigMessage&)#1}>(uWS::Subscriber*, std::__1::basic_string_view >, uWS::TopicTreeBigMessage&&, uWS::WebSocket ::publish(std::__1::basic_string_view >, std::__1::basic_string_view >, uWS::OpCode, bool)::{lambda(uWS::Subscriber*, uWS::TopicTreeBigMessage&)#1})']

176 176 uWS::WebSocket ::publish(std::__1::basic_string_view >,std::__1::basic_string_view >,uWS::OpCode,bool) call site: 00000 /src/uWebSockets/fuzzing/../src/WebSocket.h:367
58 60 2 :

['uWS::HttpResponseData ::callOnWritable(unsigned long)', 'us_socket_timeout']

58 60 uWS::HttpContext ::init()::{lambda(us_socket_t*)#1}::operator()(us_socket_t*)const call site: 00000 /src/uWebSockets/fuzzing/../src/HttpContext.h:331
38 44 3 :

['us_socket_write2', 'uWS::AsyncSocket ::uncorkWithoutSending()', 'uWS::BackPressure::append(char const*, unsigned long)']

38 61 uWS::WebSocket ::send(std::__1::basic_string_view >,uWS::OpCode,bool,bool) call site: 00000 /src/uWebSockets/fuzzing/../src/WebSocket.h:116
38 44 3 :

['us_socket_write2', 'uWS::AsyncSocket ::uncorkWithoutSending()', 'uWS::BackPressure::append(char const*, unsigned long)']

38 61 uWS::WebSocket ::send(std::__1::basic_string_view >,uWS::OpCode,bool,bool) call site: 00000 /src/uWebSockets/fuzzing/../src/WebSocket.h:116
35 35 1 :

['uWS::WebSocketProtocol >::unmaskAll(char*, char*)']

35 374 uWS::WebSocketProtocol >::consumeContinuation(char*&,unsignedint&,uWS::WebSocketState *,void*) call site: 00000 /src/uWebSockets/fuzzing/../src/WebSocketProtocol.h:432
24 41 5 :

['us_internal_poll_set_type', 'us_socket_close_connecting', 'us_socket_timeout', 'bsd_socket_nodelay', 'us_poll_change']

24 43 us_internal_dispatch_ready_poll call site: 00000 /src/uWebSockets/fuzzing/../uSockets/src/loop.c:242
24 24 5 :

['std::__1::vector ::RouterData>*)>, std::__1::allocator ::RouterData>*)> > >::begin()', '_ZNSt3__111__wrap_iterIPKN5ofats13any_invocableIFbPN3uWS10HttpRouterINS3_15HttpContextDataILb0EE10RouterDataEEEEEEEC2IPSB_EERKNS0_IT_EEPNS_9enable_ifIXsr14is_convertibleISH_SD_EE5valueEvE4typeE', 'std::__1::vector ::RouterData>*)>, std::__1::allocator ::RouterData>*)> > >::erase(std::__1::__wrap_iter ::RouterData>*)> const*>)', 'uWS::HttpRouter ::RouterData>::cullNode(uWS::HttpRouter ::RouterData>::Node*, uWS::HttpRouter ::RouterData>::Node*, unsigned int)', 'std::__1::__wrap_iter ::RouterData>*)>*>::operator+(long) const']

24 24 uWS::HttpRouter ::RouterData>::remove(std::__1::basic_string ,std::__1::allocator >,std::__1::basic_string ,std::__1::allocator >,unsignedint) call site: 00000 /src/uWebSockets/fuzzing/../src/HttpRouter.h:362
4 4 3 :

['std::__1::basic_string_view >::data() const', 'std::__1::basic_string_view >::length() const', 'ofats::any_invocable *, uWS::HttpRequest*, us_socket_context_t*)>::operator()(uWS::HttpResponse *, uWS::HttpRequest*, us_socket_context_t*)']

4 50 autouWS::TemplatedApp ::ws (std::__1::basic_string ,std::__1::allocator >,uWS::TemplatedApp ::WebSocketBehavior &&)::{lambda(auto:1*,auto:2*)#1}::operator() ,uWS::HttpRequest>(uWS::HttpResponse *,uWS::HttpRequest*) call site: 00000 /src/uWebSockets/fuzzing/../src/App.h:415
2 4 2 :

['uWS::BackPressure::length()', 'uWS::BackPressure::reserve(unsigned long)']

2 6 uWS::AsyncSocket ::write(charconst*,int,bool,int) call site: 00000 /src/uWebSockets/fuzzing/../src/AsyncSocket.h:307
2 2 2 :

['fwrite', 'free']

2 421 autotest()::$_7::operator() >(uWS::WebSocket *,std::__1::basic_string_view >,uWS::OpCode)const call site: 00000 /src/uWebSockets/fuzzing/EpollEchoServer.cpp:96
2 2 1 :

['__real_read']

2 2 __wrap_read call site: 00000 /src/uWebSockets/fuzzing/./libEpollFuzzer/epoll_fuzzer.h:334
2 2 1 :

['__real_close']

2 2 __wrap_close call site: 00000 /src/uWebSockets/fuzzing/./libEpollFuzzer/epoll_fuzzer.h:680

Runtime coverage analysis

Covered functions
782
Functions that are reachable but not covered
146
Reachable functions
583
Percentage of reachable functions covered
74.96%
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
/src/uWebSockets/fuzzing/./libEpollFuzzer/epoll_fuzzer.h 3
/src/uWebSockets/fuzzing/EpollEchoServer.cpp 1
/src/uWebSockets/fuzzing/../src/App.h 9
/src/uWebSockets/fuzzing/../src/Loop.h 8
/src/uWebSockets/fuzzing/../uSockets/src/loop.c 5
/src/uWebSockets/fuzzing/../uSockets/src/eventing/epoll_kqueue.c 17
/src/uWebSockets/fuzzing/../src/LoopData.h 1
/src/uWebSockets/fuzzing/../src/MoveOnlyFunction.h 39
/src/uWebSockets/fuzzing/../src/HttpContext.h 8
/src/uWebSockets/fuzzing/../uSockets/src/context.c 14
/src/uWebSockets/fuzzing/../src/HttpContextData.h 2
/src/uWebSockets/fuzzing/../src/HttpRouter.h 11
/src/uWebSockets/fuzzing/../src/TopicTree.h 2
/src/uWebSockets/fuzzing/../src/WebSocketContext.h 9
/src/uWebSockets/fuzzing/../src/WebSocketContextData.h 2
/src/uWebSockets/fuzzing/../src/PerMessageDeflate.h 2
/src/uWebSockets/fuzzing/../uSockets/src/bsd.c 4

Fuzzer: EpollEchoServerPubSub

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

Full calltree

Call tree overview bitmap:

The distribution of callsites in terms of coloring is
Color Runtime hitcount Callsite count Percentage
red 0 28 12.0%
gold [1:9] 1 0.43%
yellow [10:29] 1 0.43%
greenyellow [30:49] 0 0.0%
lawngreen 50+ 202 87.0%
All colors 232 100

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
156 156 1 :

['bool uWS::TopicTree ::publishBig ::publish(std::__1::basic_string_view >, std::__1::basic_string_view >, uWS::OpCode, bool)::{lambda(uWS::Subscriber*, uWS::TopicTreeBigMessage&)#1}>(uWS::Subscriber*, std::__1::basic_string_view >, uWS::TopicTreeBigMessage&&, uWS::TemplatedApp ::publish(std::__1::basic_string_view >, std::__1::basic_string_view >, uWS::OpCode, bool)::{lambda(uWS::Subscriber*, uWS::TopicTreeBigMessage&)#1})']

156 156 uWS::TemplatedApp ::publish(std::__1::basic_string_view >,std::__1::basic_string_view >,uWS::OpCode,bool) call site: 00000 /src/uWebSockets/fuzzing/../src/App.h:153
58 60 2 :

['uWS::HttpResponseData ::callOnWritable(unsigned long)', 'us_socket_timeout']

58 60 uWS::HttpContext ::init()::{lambda(us_socket_t*)#1}::operator()(us_socket_t*)const call site: 00000 /src/uWebSockets/fuzzing/../src/HttpContext.h:331
35 35 1 :

['uWS::WebSocketProtocol >::unmaskAll(char*, char*)']

35 347 uWS::WebSocketProtocol >::consumeContinuation(char*&,unsignedint&,uWS::WebSocketState *,void*) call site: 00000 /src/uWebSockets/fuzzing/../src/WebSocketProtocol.h:432
24 41 5 :

['us_internal_poll_set_type', 'us_socket_close_connecting', 'us_socket_timeout', 'bsd_socket_nodelay', 'us_poll_change']

24 43 us_internal_dispatch_ready_poll call site: 00000 /src/uWebSockets/fuzzing/../uSockets/src/loop.c:242
24 24 5 :

['uWS::HttpRouter ::RouterData>::cullNode(uWS::HttpRouter ::RouterData>::Node*, uWS::HttpRouter ::RouterData>::Node*, unsigned int)', '_ZNSt3__111__wrap_iterIPKN5ofats13any_invocableIFbPN3uWS10HttpRouterINS3_15HttpContextDataILb1EE10RouterDataEEEEEEEC2IPSB_EERKNS0_IT_EEPNS_9enable_ifIXsr14is_convertibleISH_SD_EE5valueEvE4typeE', 'std::__1::vector ::RouterData>*)>, std::__1::allocator ::RouterData>*)> > >::begin()', 'std::__1::__wrap_iter ::RouterData>*)>*>::operator+(long) const', 'std::__1::vector ::RouterData>*)>, std::__1::allocator ::RouterData>*)> > >::erase(std::__1::__wrap_iter ::RouterData>*)> const*>)']

24 24 uWS::HttpRouter ::RouterData>::remove(std::__1::basic_string ,std::__1::allocator >,std::__1::basic_string ,std::__1::allocator >,unsignedint) call site: 00000 /src/uWebSockets/fuzzing/../src/HttpRouter.h:362
4 12 2 :

['uWS::AsyncSocket ::getLoopData()', 'uWS::DeflationStream::deflate(uWS::ZlibContext*, std::__1::basic_string_view >, bool)']

4 215 uWS::WebSocket ::send(std::__1::basic_string_view >,uWS::OpCode,bool,bool) call site: 00000 /src/uWebSockets/fuzzing/../src/WebSocket.h:143
4 10 9 :

['std::__1::basic_string_view >::data() const', 'us_socket_context', 'uWS::InflationStream::inflate(uWS::ZlibContext*, std::__1::basic_string_view >, unsigned long, bool)', 'std::__1::basic_string_view >::length() const', 'std::__1::optional > >::optional()', 'us_loop_ext', 'std::__1::__optional_storage_base >, false>::has_value() const', 'us_socket_context_loop', 'std::__1::optional > >::operator->()']

4 105 uWS::WebSocketContext ::handleFragment(char*,unsignedlong,unsignedint,int,bool,uWS::WebSocketState *,void*) call site: 00000 /src/uWebSockets/fuzzing/../src/WebSocketContext.h:71
4 10 10 :

['std::__1::basic_string_view >::data() const', 'std::__1::basic_string , std::__1::allocator >::append(char const*)', 'us_socket_context', 'uWS::InflationStream::inflate(uWS::ZlibContext*, std::__1::basic_string_view >, unsigned long, bool)', 'std::__1::basic_string_view >::length() const', 'std::__1::optional > >::optional()', 'std::__1::__optional_storage_base >, false>::has_value() const', 'us_loop_ext', 'us_socket_context_loop', 'std::__1::optional > >::operator->()']

4 105 uWS::WebSocketContext ::handleFragment(char*,unsignedlong,unsignedint,int,bool,uWS::WebSocketState *,void*) call site: 00000 /src/uWebSockets/fuzzing/../src/WebSocketContext.h:122
4 4 3 :

['std::__1::basic_string_view >::data() const', 'std::__1::basic_string_view >::length() const', 'ofats::any_invocable *, uWS::HttpRequest*, us_socket_context_t*)>::operator()(uWS::HttpResponse *, uWS::HttpRequest*, us_socket_context_t*)']

4 50 autouWS::TemplatedApp ::ws (std::__1::basic_string ,std::__1::allocator >,uWS::TemplatedApp ::WebSocketBehavior &&)::{lambda(auto:1*,auto:2*)#1}::operator() ,uWS::HttpRequest>(uWS::HttpResponse *,uWS::HttpRequest*) call site: 00000 /src/uWebSockets/fuzzing/../src/App.h:415
2 4 2 :

['uWS::BackPressure::length()', 'uWS::BackPressure::reserve(unsigned long)']

2 6 uWS::AsyncSocket ::write(charconst*,int,bool,int) call site: 00000 /src/uWebSockets/fuzzing/../src/AsyncSocket.h:307
2 2 1 :

['__real_read']

2 2 __wrap_read call site: 00000 /src/uWebSockets/fuzzing/./libEpollFuzzer/epoll_fuzzer.h:334
2 2 1 :

['__real_close']

2 2 __wrap_close call site: 00000 /src/uWebSockets/fuzzing/./libEpollFuzzer/epoll_fuzzer.h:680

Runtime coverage analysis

Covered functions
728
Functions that are reachable but not covered
147
Reachable functions
556
Percentage of reachable functions covered
73.56%
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
/src/uWebSockets/fuzzing/./libEpollFuzzer/epoll_fuzzer.h 2
/src/uWebSockets/fuzzing/EpollEchoServerPubSub.cpp 1
/src/uWebSockets/fuzzing/../src/App.h 9
/src/uWebSockets/fuzzing/../src/Loop.h 8
/src/uWebSockets/fuzzing/../uSockets/src/loop.c 5
/src/uWebSockets/fuzzing/../uSockets/src/eventing/epoll_kqueue.c 17
/src/uWebSockets/fuzzing/../src/LoopData.h 1
/src/uWebSockets/fuzzing/../src/MoveOnlyFunction.h 33
/src/uWebSockets/fuzzing/../src/HttpContext.h 8
/src/uWebSockets/fuzzing/../uSockets/src/context.c 14
/src/uWebSockets/fuzzing/../src/HttpContextData.h 2
/src/uWebSockets/fuzzing/../src/HttpRouter.h 11
/src/uWebSockets/fuzzing/../src/TopicTree.h 2
/src/uWebSockets/fuzzing/../src/WebSocketContext.h 9
/src/uWebSockets/fuzzing/../src/WebSocketContextData.h 2
/src/uWebSockets/fuzzing/../src/PerMessageDeflate.h 2
/src/uWebSockets/fuzzing/../uSockets/src/bsd.c 4

Fuzzer: EpollHelloWorld

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

Full calltree

Call tree overview bitmap:

The distribution of callsites in terms of coloring is
Color Runtime hitcount Callsite count Percentage
red 0 38 12.6%
gold [1:9] 0 0.0%
yellow [10:29] 1 0.33%
greenyellow [30:49] 0 0.0%
lawngreen 50+ 261 87.0%
All colors 300 100

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
58 60 2 :

['uWS::HttpResponseData ::callOnWritable(unsigned long)', 'us_socket_timeout']

58 60 uWS::HttpContext ::init()::{lambda(us_socket_t*)#1}::operator()(us_socket_t*)const call site: 00000 /src/uWebSockets/fuzzing/../src/HttpContext.h:331
35 35 1 :

['uWS::WebSocketProtocol >::unmaskAll(char*, char*)']

35 374 uWS::WebSocketProtocol >::consumeContinuation(char*&,unsignedint&,uWS::WebSocketState *,void*) call site: 00000 /src/uWebSockets/fuzzing/../src/WebSocketProtocol.h:432
24 24 5 :

['std::__1::vector ::RouterData>*)>, std::__1::allocator ::RouterData>*)> > >::begin()', '_ZNSt3__111__wrap_iterIPKN5ofats13any_invocableIFbPN3uWS10HttpRouterINS3_15HttpContextDataILb0EE10RouterDataEEEEEEEC2IPSB_EERKNS0_IT_EEPNS_9enable_ifIXsr14is_convertibleISH_SD_EE5valueEvE4typeE', 'std::__1::vector ::RouterData>*)>, std::__1::allocator ::RouterData>*)> > >::erase(std::__1::__wrap_iter ::RouterData>*)> const*>)', 'uWS::HttpRouter ::RouterData>::cullNode(uWS::HttpRouter ::RouterData>::Node*, uWS::HttpRouter ::RouterData>::Node*, unsigned int)', 'std::__1::__wrap_iter ::RouterData>*)>*>::operator+(long) const']

24 24 uWS::HttpRouter ::RouterData>::remove(std::__1::basic_string ,std::__1::allocator >,std::__1::basic_string ,std::__1::allocator >,unsignedint) call site: 00000 /src/uWebSockets/fuzzing/../src/HttpRouter.h:362
8 8 13 :

['std::__1::__tree_const_iterator *, long>::operator*() const', 'operator delete(void*)', 'std::__1::operator!=(std::__1::__tree_const_iterator *, long> const&, std::__1::__tree_const_iterator *, long> const&)', 'std::__1::unordered_map >, std::__1::unique_ptr >, std::__1::hash > >, std::__1::equal_to > >, std::__1::allocator > const, std::__1::unique_ptr > > > >::erase(std::__1::basic_string_view > const&)', 'uWS::Subscriber::needsDrainage()', 'uWS::Subscriber::~Subscriber()', 'std::__1::set , std::__1::allocator >::begin()', 'std::__1::unordered_set , std::__1::equal_to , std::__1::allocator >::size() const', 'std::__1::basic_string , std::__1::allocator >::operator std::__1::basic_string_view >() const', 'std::__1::set , std::__1::allocator >::end()', 'uWS::TopicTree ::unlinkDrainableSubscriber(uWS::Subscriber*)', 'std::__1::unordered_set , std::__1::equal_to , std::__1::allocator >::erase(uWS::Subscriber* const&)', 'std::__1::__tree_const_iterator *, long>::operator++()']

8 8 uWS::TopicTree ::freeSubscriber(uWS::Subscriber*) call site: 00000 /src/uWebSockets/fuzzing/../src/TopicTree.h:225
4 4 3 :

['std::__1::basic_string_view >::data() const', 'std::__1::basic_string_view >::length() const', 'ofats::any_invocable *, uWS::HttpRequest*, us_socket_context_t*)>::operator()(uWS::HttpResponse *, uWS::HttpRequest*, us_socket_context_t*)']

4 50 autouWS::TemplatedApp ::ws (std::__1::basic_string ,std::__1::allocator >,uWS::TemplatedApp ::WebSocketBehavior &&)::{lambda(auto:1*,auto:2*)#1}::operator() ,uWS::HttpRequest>(uWS::HttpResponse *,uWS::HttpRequest*) call site: 00000 /src/uWebSockets/fuzzing/../src/App.h:415
4 4 8 :

['std::__1::__tree_const_iterator *, long>::operator*() const', 'std::__1::operator!=(std::__1::__tree_const_iterator *, long> const&, std::__1::__tree_const_iterator *, long> const&)', 'std::__1::basic_string , std::__1::allocator >::operator std::__1::basic_string_view >() const', 'std::__1::set , std::__1::allocator >::begin()', 'std::__1::unordered_set , std::__1::equal_to , std::__1::allocator >::size() const', 'std::__1::set , std::__1::allocator >::end()', 'ofats::any_invocable *, std::__1::basic_string_view >, int, int)>::operator()(uWS::WebSocket *, std::__1::basic_string_view >, int, int)', 'std::__1::__tree_const_iterator *, long>::operator++()']

4 37 autouWS::WebSocketContext ::init()::{lambda(auto:1*,int,void*)#1}::operator() (us_socket_t*,int,void*)const call site: 00000 /src/uWebSockets/fuzzing/../src/WebSocketContext.h:262
4 4 8 :

['std::__1::__tree_const_iterator *, long>::operator*() const', 'std::__1::operator!=(std::__1::__tree_const_iterator *, long> const&, std::__1::__tree_const_iterator *, long> const&)', 'std::__1::basic_string , std::__1::allocator >::operator std::__1::basic_string_view >() const', 'std::__1::set , std::__1::allocator >::begin()', 'std::__1::unordered_set , std::__1::equal_to , std::__1::allocator >::size() const', 'std::__1::set , std::__1::allocator >::end()', 'ofats::any_invocable *, std::__1::basic_string_view >, int, int)>::operator()(uWS::WebSocket *, std::__1::basic_string_view >, int, int)', 'std::__1::__tree_const_iterator *, long>::operator++()']

4 26 uWS::WebSocket ::end(int,std::__1::basic_string_view >) call site: 00000 /src/uWebSockets/fuzzing/../src/WebSocket.h:230
2 4 2 :

['uWS::BackPressure::length()', 'uWS::BackPressure::reserve(unsigned long)']

2 6 uWS::AsyncSocket ::write(charconst*,int,bool,int) call site: 00000 /src/uWebSockets/fuzzing/../src/AsyncSocket.h:307
2 2 1 :

['__real_read']

2 2 __wrap_read call site: 00000 /src/uWebSockets/fuzzing/./libEpollFuzzer/epoll_fuzzer.h:334
2 2 1 :

['__real_close']

2 2 __wrap_close call site: 00000 /src/uWebSockets/fuzzing/./libEpollFuzzer/epoll_fuzzer.h:680
0 163 10 :

['uWS::AsyncSocket ::timeout(unsigned int)', 'uWS::AsyncSocket ::getLoopData()', 'uWS::AsyncSocket ::uncork(char const*, int, bool)', 'uWS::AsyncSocket ::shutdown()', 'uWS::HttpResponse ::getHttpResponseData()', 'std::__1::tuple_element<0ul, std::__1::pair >::type&& std::__1::get<0ul, int, bool>(std::__1::pair &&)', 'uWS::AsyncSocket ::cork()', 'uWS::AsyncSocket ::getBufferedAmount()', 'uWS::AsyncSocket ::close()', 'std::__1::tuple_element<1ul, std::__1::pair >::type&& std::__1::get<1ul, int, bool>(std::__1::pair &&)']

0 167 uWS::HttpResponse ::cork(ofats::any_invocable &&) call site: 00000 /src/uWebSockets/fuzzing/../src/HttpResponse.h:498
0 29 1 :

['uWS::WebSocketContext ::forceClose(uWS::WebSocketState *, void*, std::__1::basic_string_view >)']

0 29 booluWS::WebSocketProtocol >::consumeMessage<6u,unsignedchar>(unsignedchar,char*&,unsignedint&,uWS::WebSocketState *,void*) call site: 00000 /src/uWebSockets/fuzzing/../src/WebSocketProtocol.h:353

Runtime coverage analysis

Covered functions
848
Functions that are reachable but not covered
165
Reachable functions
619
Percentage of reachable functions covered
73.34%
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
/src/uWebSockets/fuzzing/./libEpollFuzzer/epoll_fuzzer.h 2
/src/uWebSockets/fuzzing/EpollHelloWorld.cpp 1
/src/uWebSockets/fuzzing/../src/App.h 17
/src/uWebSockets/fuzzing/../src/Loop.h 8
/src/uWebSockets/fuzzing/../uSockets/src/loop.c 6
/src/uWebSockets/fuzzing/../uSockets/src/eventing/epoll_kqueue.c 17
/src/uWebSockets/fuzzing/../src/LoopData.h 1
/src/uWebSockets/fuzzing/../src/MoveOnlyFunction.h 39
/src/uWebSockets/fuzzing/../src/HttpContext.h 8
/src/uWebSockets/fuzzing/../uSockets/src/context.c 20
/src/uWebSockets/fuzzing/../src/HttpContextData.h 2
/src/uWebSockets/fuzzing/../src/HttpRouter.h 12
/src/uWebSockets/fuzzing/../src/TopicTree.h 2
/src/uWebSockets/fuzzing/../src/WebSocketContext.h 9
/src/uWebSockets/fuzzing/../src/WebSocketContextData.h 2
/src/uWebSockets/fuzzing/../src/PerMessageDeflate.h 2
/src/uWebSockets/fuzzing/../uSockets/src/bsd.c 8
/src/uWebSockets/fuzzing/../uSockets/src/socket.c 2
/usr/include/x86_64-linux-gnu/bits/byteswap.h 1

Analyses and suggestions

Optimal target analysis

Remaining optimal interesting functions

The following table shows a list of functions that are optimal targets. Optimal targets are identified by finding the functions that in combination, yield a high code coverage.

Func name Functions filename Arg count Args Function depth hitcount instr count bb count cyclomatic complexity Reachable functions Incoming references total cyclomatic complexity Unreached complexity
autouWS::TemplatedApp ::ws (std::__1::basic_string ,std::__1::allocator >,uWS::TemplatedApp ::WebSocketBehavior &&)::{lambda(auto:1*,auto:2*)#1}::operator() ,uWS::HttpRequest>(uWS::HttpResponse *,uWS::HttpRequest*) /src/uWebSockets/fuzzing/../src/App.h 3 ['class.anon.241 *', 'struct.std::__1::nullopt_t *', 'struct.uWS::HttpRequest *'] 26 0 171 16 4 540 0 734 551
uWS::HttpContext ::init()::{lambda(us_socket_t*,char*,int)#1}::__invoke(us_socket_t*,char*,int) /src/uWebSockets/fuzzing/../src/HttpContext.h 3 ['struct.us_socket_t *', 'char *', 'int'] 7 0 15 3 2 149 0 346 210
StaticData::StaticData() /src/uWebSockets/fuzzing/Http.cpp 1 ['struct.StaticData *'] 4 0 292 60 41 41 2 193 191
uWS::Loop::run() /src/uWebSockets/fuzzing/../src/Loop.h 1 ['struct.std::__1::nullopt_t *'] 5 0 14 3 2 51 0 168 99
uWS::WebSocketProtocol ::consume(char*,unsignedint,uWS::WebSocketState *,void*) /src/uWebSockets/fuzzing/./../src/WebSocketProtocol.h 4 ['char *', 'int', 'struct.uWS::WebSocketState *', 'char *'] 18 0 300 57 24 69 0 138 91
autotest()::$_1::operator() >(uWS::WebSocket *,std::__1::basic_string_view >,uWS::OpCode)const /src/uWebSockets/fuzzing/EpollEchoServer.cpp 4 ['struct.std::__1::nullopt_t *', 'char *', 'size_t', 'char'] 10 0 97 18 8 145 0 321 84
uWS::HttpContext ::init()::{lambda(us_socket_t*,char*,int)#1}::operator()(us_socket_t*,char*,int)const::{lambda(void*,uWS::HttpRequest*)#1}::operator()({lambda(us_socket_t*,char*,int)#1},uWS::HttpRequest)const /src/uWebSockets/fuzzing/../src/HttpContext.h 3 ['class.anon.174 *', 'char *', 'struct.uWS::HttpRequest *'] 4 0 179 32 13 50 0 109 62
uWS::HttpContext ::init()::{lambda(us_socket_t*)#1}::__invoke(us_socket_t*) /src/uWebSockets/fuzzing/../src/HttpContext.h 1 ['struct.us_socket_t *'] 7 0 13 3 2 87 0 174 60
autouWS::TemplatedApp ::ws (std::__1::basic_string ,std::__1::allocator >,uWS::TemplatedApp ::WebSocketBehavior &&)::{lambda(auto:1*,auto:2*)#1}::operator() ,uWS::HttpRequest>(uWS::HttpResponse *,uWS::HttpRequest*) /src/uWebSockets/fuzzing/../src/App.h 3 ['class.anon.288 *', 'struct.std::__1::nullopt_t *', 'struct.uWS::HttpRequest *'] 26 0 171 16 4 538 0 732 60
uWS::HttpContext ::init()::{lambda(us_socket_t*,char*,int)#1}::operator()(us_socket_t*,char*,int)const::{lambda(void*,uWS::HttpRequest*)#1}::operator()({lambda(us_socket_t*,char*,int)#1},uWS::HttpRequest)const /src/uWebSockets/fuzzing/../src/HttpContext.h 3 ['class.anon.153 *', 'char *', 'struct.uWS::HttpRequest *'] 4 0 163 29 12 49 0 106 51

Implementing fuzzers that target the above functions will improve reachability such that it becomes:

Functions statically reachable by fuzzers
55.0%
907 / 1649
Cyclomatic complexity statically reachable by fuzzers
57.9%
3689 / 6318

All functions overview

If you implement fuzzers for these functions, the status of all functions in the project will be:

Func name Functions filename Args Function call depth 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

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/uWebSockets/fuzzing/Extensions.cpp

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=['uWS::ExtensionsParser::getToken(char const*&, char const*)']

/src/uWebSockets/fuzzing/PerMessageDeflate.cpp

Dictionary

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


/src/uWebSockets/fuzzing/MultipartParser.cpp

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=['LLVMFuzzerTestOneInput', 'uWS::ParameterParser::getToken()']

/src/uWebSockets/fuzzing/QueryParser.cpp

Dictionary

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


/src/uWebSockets/fuzzing/TopicTree.cpp

Dictionary

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


/src/uWebSockets/fuzzing/WebSocket.cpp

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=['LLVMFuzzerTestOneInput']

/src/uWebSockets/fuzzing/Http.cpp

Dictionary

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


/src/uWebSockets/fuzzing/Http.cpp

Dictionary

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


/src/uWebSockets/fuzzing/./libEpollFuzzer/epoll_fuzzer.h

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=['us_socket_context_free', 'uWS::Loop::free()', 'uWS::HttpContext::create(uWS::Loop*, us_socket_context_options_t)', 'ofats::any_detail::any_invocable_impl::any_invocable_impl()', 'uWS::HttpRouter::RouterData>::findHandler(std::__1::basic_string, std::__1::allocator >, std::__1::basic_string, std::__1::allocator >, unsigned int)', 'uWS::Loop::getLazyLoop()', 'uWS::Loop::wakeupCb(us_loop_t*)', 'uWS::HttpContext::onHttp(std::__1::basic_string, std::__1::allocator >, std::__1::basic_string, std::__1::allocator >, ofats::any_invocable*, uWS::HttpRequest*)>&&, bool)', 'bsd_close_socket', 'test()']

/src/uWebSockets/fuzzing/./libEpollFuzzer/epoll_fuzzer.h

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=['uWS::WebSocketContext::create(uWS::Loop*, us_socket_context_t*, uWS::TopicTree*)', 'uWS::Loop::free()', 'uWS::HttpContext::create(uWS::Loop*, us_socket_context_options_t)', 'ofats::any_detail::any_invocable_impl::any_invocable_impl()', 'uWS::HttpRouter::RouterData>::findHandler(std::__1::basic_string, std::__1::allocator >, std::__1::basic_string, std::__1::allocator >, unsigned int)', 'uWS::Loop::getLazyLoop()', 'uWS::Loop::wakeupCb(us_loop_t*)', 'uWS::HttpContext::onHttp(std::__1::basic_string, std::__1::allocator >, std::__1::basic_string, std::__1::allocator >, ofats::any_invocable*, uWS::HttpRequest*)>&&, bool)', 'uWS::HttpContext::onHttp(std::__1::basic_string, std::__1::allocator >, std::__1::basic_string, std::__1::allocator >, ofats::any_invocable*, uWS::HttpRequest*)>&&, bool)', 'test()']

/src/uWebSockets/fuzzing/./libEpollFuzzer/epoll_fuzzer.h

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=['uWS::WebSocketContext::create(uWS::Loop*, us_socket_context_t*, uWS::TopicTree*)', 'uWS::TemplatedApp&& uWS::TemplatedApp::ws(std::__1::basic_string, std::__1::allocator >, uWS::TemplatedApp::WebSocketBehavior&&)', 'uWS::Loop::free()', 'uWS::Loop::wakeupCb(us_loop_t*)', 'uWS::HttpContext::create(uWS::Loop*, us_socket_context_options_t)', 'ofats::any_detail::any_invocable_impl::any_invocable_impl()', 'uWS::HttpRouter::RouterData>::findHandler(std::__1::basic_string, std::__1::allocator >, std::__1::basic_string, std::__1::allocator >, unsigned int)', 'uWS::Loop::getLazyLoop()', 'uWS::HttpContext::onHttp(std::__1::basic_string, std::__1::allocator >, std::__1::basic_string, std::__1::allocator >, ofats::any_invocable*, uWS::HttpRequest*)>&&, bool)', 'test()']

/src/uWebSockets/fuzzing/./libEpollFuzzer/epoll_fuzzer.h

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=['uWS::HttpContext::onHttp(std::__1::basic_string, std::__1::allocator >, std::__1::basic_string, std::__1::allocator >, ofats::any_invocable*, uWS::HttpRequest*)>&&, bool)', 'uWS::WebSocketContext::create(uWS::Loop*, us_socket_context_t*, uWS::TopicTree*)', 'uWS::Loop::free()', 'uWS::HttpContext::create(uWS::Loop*, us_socket_context_options_t)', 'ofats::any_detail::any_invocable_impl::any_invocable_impl()', 'uWS::HttpRouter::RouterData>::findHandler(std::__1::basic_string, std::__1::allocator >, std::__1::basic_string, std::__1::allocator >, unsigned int)', 'bsd_create_connect_socket', 'test()', 'uWS::Loop::getLazyLoop()', 'uWS::Loop::wakeupCb(us_loop_t*)']

Runtime coverage analysis

This section shows analysis of runtime coverage data.

For futher technical details on how this section is generated, please see the Glossary .

Complex functions with low coverage

Func name Function total lines Lines covered at runtime percentage covered Reached by fuzzers
unsignedlonguWS::protocol::formatMessage (char*,charconst*,unsignedlong,uWS::OpCode,unsignedlong,bool,bool) 38 20 52.63% ['EpollEchoServer', 'EpollEchoServerPubSub', 'EpollHelloWorld']
uWS::HttpResponse ::internalEnd(std::__1::basic_string_view >,unsignedlong,bool,bool,bool) 74 39 52.70% []
uWS::HttpRouter ::RouterData>::executeHandlers(uWS::HttpRouter ::RouterData>::Node*,int,uWS::HttpContextData ::RouterData&) 31 14 45.16% []
uWS::WebSocket ::send(std::__1::basic_string_view >,uWS::OpCode,bool,bool) 67 33 49.25% []

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/uWebSockets/fuzzing/../uSockets/src/eventing/epoll_kqueue.c ['AsyncEpollHelloWorld', 'EpollEchoServer', 'EpollEchoServerPubSub', 'EpollHelloWorld'] []
/src/uWebSockets/fuzzing/../uSockets/src/udp.c [] []
/src/uWebSockets/fuzzing/../src/MoveOnlyFunction.h ['AsyncEpollHelloWorld', 'EpollEchoServer', 'EpollEchoServerPubSub', 'EpollHelloWorld'] []
/src/uWebSockets/fuzzing/../src/BloomFilter.h [] []
/src/uWebSockets/fuzzing/./../src/TopicTree.h ['TopicTree'] []
/src/uWebSockets/fuzzing/../src/HttpParser.h [] []
/usr/include/x86_64-linux-gnu/bits/byteswap.h ['EpollHelloWorld'] []
/src/uWebSockets/fuzzing/../src/AsyncSocket.h [] []
/src/uWebSockets/fuzzing/QueryParser.cpp ['QueryParser'] ['QueryParser']
/src/uWebSockets/fuzzing/../src/App.h ['AsyncEpollHelloWorld', 'EpollEchoServer', 'EpollEchoServerPubSub', 'EpollHelloWorld'] []
/src/uWebSockets/fuzzing/../src/WebSocketProtocol.h [] []
/src/uWebSockets/fuzzing/./../src/WebSocketProtocol.h ['WebSocket'] []
/usr/local/bin/../include/c++/v1/math.h [] []
/src/uWebSockets/fuzzing/./helpers.h ['PerMessageDeflate', 'TopicTree', 'WebSocket', 'Http', 'HttpWithProxy'] []
/src/uWebSockets/fuzzing/../src/WebSocketHandshake.h [] []
/src/uWebSockets/fuzzing/../src/HttpRouter.h ['AsyncEpollHelloWorld', 'EpollEchoServer', 'EpollEchoServerPubSub', 'EpollHelloWorld'] []
/src/uWebSockets/fuzzing/../src/QueryParser.h [] []
/src/uWebSockets/fuzzing/Extensions.cpp ['Extensions'] ['Extensions']
/src/uWebSockets/fuzzing/../src/HttpContext.h ['AsyncEpollHelloWorld', 'EpollEchoServer', 'EpollEchoServerPubSub', 'EpollHelloWorld'] []
/src/uWebSockets/fuzzing/../src/WebSocketExtensions.h [] []
/src/uWebSockets/fuzzing/../src/ChunkedEncoding.h [] []
/src/uWebSockets/fuzzing/./../src/MoveOnlyFunction.h [] []
/src/uWebSockets/fuzzing/../src/WebSocketContextData.h ['EpollEchoServer', 'EpollEchoServerPubSub', 'EpollHelloWorld'] []
/src/uWebSockets/fuzzing/../src/HttpResponseData.h [] []
/src/uWebSockets/fuzzing/PerMessageDeflate.cpp ['PerMessageDeflate'] ['PerMessageDeflate']
/src/uWebSockets/fuzzing/../uSockets/src/bsd.c ['AsyncEpollHelloWorld', 'EpollEchoServer', 'EpollEchoServerPubSub', 'EpollHelloWorld'] []
/src/uWebSockets/fuzzing/../src/WebSocketData.h [] []
/src/uWebSockets/fuzzing/../src/Utilities.h [] []
/src/uWebSockets/fuzzing/./../src/ProxyParser.h ['HttpWithProxy'] []
/usr/include/stdlib.h [] []
/src/uWebSockets/fuzzing/../src/WebSocket.h [] []
/src/uWebSockets/fuzzing/./../src/Multipart.h ['MultipartParser'] []
/src/uWebSockets/fuzzing/TopicTree.cpp ['TopicTree'] ['TopicTree']
/usr/include/x86_64-linux-gnu/bits/socket.h [] []
/src/uWebSockets/fuzzing/./../src/HttpParser.h ['Http', 'HttpWithProxy'] []
/src/uWebSockets/fuzzing/../src/HttpResponse.h [] []
/src/uWebSockets/fuzzing/../uSockets/src/loop.c ['AsyncEpollHelloWorld', 'EpollEchoServer', 'EpollEchoServerPubSub', 'EpollHelloWorld'] []
/src/uWebSockets/fuzzing/EpollEchoServerPubSub.cpp ['EpollEchoServerPubSub'] ['EpollEchoServerPubSub']
/src/uWebSockets/fuzzing/./../src/ChunkedEncoding.h [] []
/usr/local/bin/../include/c++/v1/optional ['MultipartParser'] []
/src/uWebSockets/fuzzing/./../src/BloomFilter.h [] []
/src/uWebSockets/fuzzing/../src/AsyncSocketData.h [] []
/src/uWebSockets/fuzzing/MultipartParser.cpp ['MultipartParser'] ['MultipartParser']
/src/uWebSockets/fuzzing/Http.cpp ['Http', 'HttpWithProxy'] ['Http', 'HttpWithProxy']
/usr/local/bin/../include/c++/v1/charconv [] []
/usr/include/ctype.h ['Extensions', 'MultipartParser'] []
/src/uWebSockets/fuzzing/WebSocket.cpp ['WebSocket'] ['WebSocket']
/src/uWebSockets/fuzzing/EpollHelloWorld.cpp ['EpollHelloWorld'] ['EpollHelloWorld']
/src/uWebSockets/fuzzing/./../src/PerMessageDeflate.h ['PerMessageDeflate'] []
/src/uWebSockets/fuzzing/AsyncEpollHelloWorld.cpp ['AsyncEpollHelloWorld'] ['AsyncEpollHelloWorld']
/src/uWebSockets/fuzzing/./../src/QueryParser.h ['QueryParser'] []
/src/uWebSockets/fuzzing/../src/LoopData.h ['AsyncEpollHelloWorld', 'EpollEchoServer', 'EpollEchoServerPubSub', 'EpollHelloWorld'] []
/usr/local/bin/../include/c++/v1/exception [] []
/src/uWebSockets/fuzzing/./../src/WebSocketExtensions.h ['Extensions'] []
/usr/local/bin/../include/c++/v1/stdexcept [] []
/src/uWebSockets/fuzzing/../src/HttpContextData.h ['AsyncEpollHelloWorld', 'EpollEchoServer', 'EpollEchoServerPubSub', 'EpollHelloWorld'] []
/src/uWebSockets/fuzzing/../uSockets/src/socket.c ['EpollHelloWorld'] []
/src/uWebSockets/fuzzing/../uSockets/src/context.c ['AsyncEpollHelloWorld', 'EpollEchoServer', 'EpollEchoServerPubSub', 'EpollHelloWorld'] []
/src/uWebSockets/fuzzing/./../src/HttpRouter.h [] []
/src/uWebSockets/fuzzing/../src/Loop.h ['AsyncEpollHelloWorld', 'EpollEchoServer', 'EpollEchoServerPubSub', 'EpollHelloWorld'] []
/src/uWebSockets/fuzzing/../src/TopicTree.h ['AsyncEpollHelloWorld', 'EpollEchoServer', 'EpollEchoServerPubSub', 'EpollHelloWorld'] []
/src/uWebSockets/fuzzing/./libEpollFuzzer/epoll_fuzzer.h ['AsyncEpollHelloWorld', 'EpollEchoServer', 'EpollEchoServerPubSub', 'EpollHelloWorld'] []
/src/uWebSockets/fuzzing/../src/PerMessageDeflate.h ['EpollEchoServer', 'EpollEchoServerPubSub', 'EpollHelloWorld'] []
/src/uWebSockets/fuzzing/../src/WebSocketContext.h ['EpollEchoServer', 'EpollEchoServerPubSub', 'EpollHelloWorld'] []
/src/uWebSockets/fuzzing/EpollEchoServer.cpp ['EpollEchoServer'] ['EpollEchoServer']
/src/uWebSockets/fuzzing/./../src/MessageParser.h ['MultipartParser'] []

Directories in report

Directory
/usr/local/bin/../include/c++/v1/
/src/uWebSockets/fuzzing/../src/
/src/uWebSockets/fuzzing/./libEpollFuzzer/
/src/uWebSockets/fuzzing/../uSockets/src/
/src/uWebSockets/fuzzing/./../src/
/src/uWebSockets/fuzzing/
/usr/include/
/src/uWebSockets/fuzzing/../uSockets/src/eventing/
/usr/include/x86_64-linux-gnu/bits/
/src/uWebSockets/fuzzing/./

Metadata section

This sections shows the raw data that is used to produce this report. This is mainly used for further processing and developer debugging.

Fuzzer Calltree file Program data file Coverage file
Extensions fuzzerLogFile-0-DqouaEcLUm.data fuzzerLogFile-0-DqouaEcLUm.data.yaml Extensions.covreport
PerMessageDeflate fuzzerLogFile-0-U6fNJdiq8M.data fuzzerLogFile-0-U6fNJdiq8M.data.yaml PerMessageDeflate.covreport
MultipartParser fuzzerLogFile-0-yCQzc9lHmG.data fuzzerLogFile-0-yCQzc9lHmG.data.yaml MultipartParser.covreport
QueryParser fuzzerLogFile-0-ueo5PLNaMw.data fuzzerLogFile-0-ueo5PLNaMw.data.yaml QueryParser.covreport
TopicTree fuzzerLogFile-0-j3DtopdtOz.data fuzzerLogFile-0-j3DtopdtOz.data.yaml TopicTree.covreport
WebSocket fuzzerLogFile-0-4nNVAF099s.data fuzzerLogFile-0-4nNVAF099s.data.yaml WebSocket.covreport
Http fuzzerLogFile-0-dOlqOXDMxO.data fuzzerLogFile-0-dOlqOXDMxO.data.yaml Http.covreport
HttpWithProxy fuzzerLogFile-0-KNcD5oQJTq.data fuzzerLogFile-0-KNcD5oQJTq.data.yaml HttpWithProxy.covreport
AsyncEpollHelloWorld fuzzerLogFile-0-s7lWjwPOdx.data fuzzerLogFile-0-s7lWjwPOdx.data.yaml AsyncEpollHelloWorld.covreport
EpollEchoServer fuzzerLogFile-0-JBeBGug6OK.data fuzzerLogFile-0-JBeBGug6OK.data.yaml EpollEchoServer.covreport
EpollEchoServerPubSub fuzzerLogFile-0-HpzimPbptB.data fuzzerLogFile-0-HpzimPbptB.data.yaml EpollEchoServerPubSub.covreport
EpollHelloWorld fuzzerLogFile-0-nenzjko0M9.data fuzzerLogFile-0-nenzjko0M9.data.yaml EpollHelloWorld.covreport