Fuzz introspector
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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: QueryParser
Call tree
Runtime coverage analysis
Files reached
Fuzzer: TopicTree
Call tree
Fuzz blockers
Runtime coverage analysis
Files reached
Fuzzer: Extensions
Call tree
Fuzz blockers
Runtime coverage analysis
Files reached
Fuzzer: PerMessageDeflate
Call tree
Runtime coverage analysis
Files reached
Fuzzer: WebSocket
Call tree
Fuzz blockers
Runtime coverage analysis
Files reached
Fuzzer: MultipartParser
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: EpollEchoServerPubSub
Call tree
Fuzz blockers
Runtime coverage analysis
Files reached
Fuzzer: EpollEchoServer
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/QueryParser.cpp
Dictionary
Fuzzer function priority
/src/uWebSockets/fuzzing/TopicTree.cpp
Dictionary
Fuzzer function priority
/src/uWebSockets/fuzzing/Extensions.cpp
Dictionary
Fuzzer function priority
/src/uWebSockets/fuzzing/PerMessageDeflate.cpp
Dictionary
Fuzzer function priority
/src/uWebSockets/fuzzing/WebSocket.cpp
Dictionary
Fuzzer function priority
/src/uWebSockets/fuzzing/MultipartParser.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
Report generation date: 2025-06-13

Project overview: uwebsockets

High level conclusions

Reachability and coverage overview

Functions statically reachable by fuzzers
42.0%
689 / 1629
Cyclomatic complexity statically reachable by fuzzers
48.0%
2993 / 6293
Runtime code coverage of functions
82.0%
1332 / 1629

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
QueryParser /src/uWebSockets/fuzzing/QueryParser.cpp 3 16 1 2 55 23 QueryParser.cpp
TopicTree /src/uWebSockets/fuzzing/TopicTree.cpp 20 32 2 3 87 51 TopicTree.cpp
Extensions /src/uWebSockets/fuzzing/Extensions.cpp 10 5 5 3 162 53 Extensions.cpp
PerMessageDeflate /src/uWebSockets/fuzzing/PerMessageDeflate.cpp 12 17 2 3 41 30 PerMessageDeflate.cpp
WebSocket /src/uWebSockets/fuzzing/WebSocket.cpp 12 56 2 3 37 24 WebSocket.cpp
MultipartParser /src/uWebSockets/fuzzing/MultipartParser.cpp 24 15 4 5 155 74 MultipartParser.cpp
Http /src/uWebSockets/fuzzing/Http.cpp 12 160 2 3 42 26 Http.cpp
HttpWithProxy /src/uWebSockets/fuzzing/Http.cpp 14 163 2 4 43 28 Http.cpp
AsyncEpollHelloWorld /src/uWebSockets/fuzzing/./libEpollFuzzer/epoll_fuzzer.h 272 400 10 16 1024 742 epoll_fuzzer.h
EpollEchoServerPubSub /src/uWebSockets/fuzzing/./libEpollFuzzer/epoll_fuzzer.h 697 583 25 24 2421 1633 epoll_fuzzer.h
EpollEchoServer /src/uWebSockets/fuzzing/./libEpollFuzzer/epoll_fuzzer.h 729 608 25 24 2508 1690 epoll_fuzzer.h
EpollHelloWorld /src/uWebSockets/fuzzing/./libEpollFuzzer/epoll_fuzzer.h 759 619 25 24 2654 1799 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: 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+ 12 100.%
All colors 12 100

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::terminate()', 'std::__1::basic_ostream >& std::__1::operator<<[abi:ne180100] >(std::__1::basic_ostream >&, char const*)', 'std::__1::basic_ostream >::operator<<[abi:ne180100](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:107

Runtime coverage analysis

Covered functions
20
Functions that are reachable but not covered
7
Reachable functions
20
Percentage of reachable functions covered
65.0%
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/TopicTree.cpp 1
/src/uWebSockets/fuzzing/./../src/TopicTree.h 6
/src/uWebSockets/fuzzing/./helpers.h 2

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 >::operator+=[abi:ne180100](std::__1::basic_string , std::__1::allocator > const&)', 'std::__1::basic_string , std::__1::allocator > std::__1::operator+[abi:ne180100] , std::__1::allocator >(char const*, std::__1::basic_string , std::__1::allocator >&&)', 'std::__1::to_string(int)', '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+ 10 100.%
All colors 10 100

Runtime coverage analysis

Covered functions
9
Functions that are reachable but not covered
3
Reachable functions
12
Percentage of reachable functions covered
75.0%
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 2
/src/uWebSockets/fuzzing/./helpers.h 2

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 12.5%
gold [1:9] 0 0.0%
yellow [10:29] 0 0.0%
greenyellow [30:49] 0 0.0%
lawngreen 50+ 7 87.5%
All colors 8 100

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:437
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:358

Runtime coverage analysis

Covered functions
34
Functions that are reachable but not covered
5
Reachable functions
12
Percentage of reachable functions covered
58.33%
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 2

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: 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+ 8 100.%
All colors 8 100

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
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 14 :

['std::__1::vector >::operator[][abi:ne180100](unsigned long)', 'std::__1::vector ::Node, std::__1::default_delete ::Node> >, std::__1::allocator ::Node, std::__1::default_delete ::Node> > > >::begin[abi:ne180100]()', '_ZNSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEC2INS_17basic_string_viewIcS2_EETnNS_9enable_ifIXaasr33__can_be_converted_to_string_viewIcS2_T_EE5valuentsr17__is_same_uncvrefISA_S5_EE5valueEiE4typeELi0EEERKSA_', 'std::__1::vector ::Node, std::__1::default_delete ::Node> >, std::__1::allocator ::Node, std::__1::default_delete ::Node> > > >::end[abi:ne180100]()', 'std::__1::basic_string , std::__1::allocator >::operator[][abi:ne180100](unsigned long)', 'std::__1::vector >::size[abi:ne180100]() const', 'std::__1::basic_string , std::__1::allocator >::length[abi:ne180100]() const', 'std::__1::__wrap_iter ::Node, std::__1::default_delete ::Node> >*>::operator++[abi:ne180100]()', 'std::__1::__wrap_iter ::Node, std::__1::default_delete ::Node> >*>::operator*[abi:ne180100]() const', 'bool std::__1::operator==[abi:ne180100] >(std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&)', 'bool std::__1::operator!=[abi:ne180100] ::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&)', 'std::__1::unique_ptr ::Node, std::__1::default_delete ::Node> >::get[abi:ne180100]() const', 'std::__1::unique_ptr ::Node, std::__1::default_delete ::Node> >::operator->[abi:ne180100]() const', 'uWS::HttpRouter ::getUrlSegment(int)']

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 12 12 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:364
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 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
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:494

Runtime coverage analysis

Covered functions
128
Functions that are reachable but not covered
7
Reachable functions
12
Percentage of reachable functions covered
41.67%
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 2

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+ 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
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 14 :

['std::__1::vector >::operator[][abi:ne180100](unsigned long)', 'std::__1::vector ::Node, std::__1::default_delete ::Node> >, std::__1::allocator ::Node, std::__1::default_delete ::Node> > > >::begin[abi:ne180100]()', '_ZNSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEC2INS_17basic_string_viewIcS2_EETnNS_9enable_ifIXaasr33__can_be_converted_to_string_viewIcS2_T_EE5valuentsr17__is_same_uncvrefISA_S5_EE5valueEiE4typeELi0EEERKSA_', 'std::__1::vector ::Node, std::__1::default_delete ::Node> >, std::__1::allocator ::Node, std::__1::default_delete ::Node> > > >::end[abi:ne180100]()', 'std::__1::basic_string , std::__1::allocator >::operator[][abi:ne180100](unsigned long)', 'std::__1::vector >::size[abi:ne180100]() const', 'std::__1::basic_string , std::__1::allocator >::length[abi:ne180100]() const', 'std::__1::__wrap_iter ::Node, std::__1::default_delete ::Node> >*>::operator++[abi:ne180100]()', 'std::__1::__wrap_iter ::Node, std::__1::default_delete ::Node> >*>::operator*[abi:ne180100]() const', 'bool std::__1::operator==[abi:ne180100] >(std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&)', 'bool std::__1::operator!=[abi:ne180100] ::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&)', 'std::__1::unique_ptr ::Node, std::__1::default_delete ::Node> >::get[abi:ne180100]() const', 'std::__1::unique_ptr ::Node, std::__1::default_delete ::Node> >::operator->[abi:ne180100]() const', 'uWS::HttpRouter ::getUrlSegment(int)']

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 12 12 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:364
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 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
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:494

Runtime coverage analysis

Covered functions
131
Functions that are reachable but not covered
9
Reachable functions
14
Percentage of reachable functions covered
35.71%
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 2

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 63 20.8%
gold [1:9] 1 0.33%
yellow [10:29] 1 0.33%
greenyellow [30:49] 0 0.0%
lawngreen 50+ 237 78.4%
All colors 302 100

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
78 80 2 :

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

78 80 uWS::HttpContext ::init()::{lambda(us_socket_t*)#1}::operator()(us_socket_t*)const call site: 00000 /src/uWebSockets/fuzzing/../src/HttpContext.h:333
24 41 5 :

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

24 43 us_internal_dispatch_ready_poll call site: 00235 /src/uWebSockets/fuzzing/../uSockets/src/loop.c:242
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 14 :

['uWS::HttpRouter ::RouterData>::getUrlSegment(int)', 'std::__1::__wrap_iter ::RouterData>::Node, std::__1::default_delete ::RouterData>::Node> >*>::operator*[abi:ne180100]() const', 'std::__1::vector >::operator[][abi:ne180100](unsigned long)', 'std::__1::unique_ptr ::RouterData>::Node, std::__1::default_delete ::RouterData>::Node> >::get[abi:ne180100]() const', '_ZNSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEC2INS_17basic_string_viewIcS2_EETnNS_9enable_ifIXaasr33__can_be_converted_to_string_viewIcS2_T_EE5valuentsr17__is_same_uncvrefISA_S5_EE5valueEiE4typeELi0EEERKSA_', 'std::__1::basic_string , std::__1::allocator >::operator[][abi:ne180100](unsigned long)', 'std::__1::__wrap_iter ::RouterData>::Node, std::__1::default_delete ::RouterData>::Node> >*>::operator++[abi:ne180100]()', 'std::__1::vector >::size[abi:ne180100]() const', 'std::__1::basic_string , std::__1::allocator >::length[abi:ne180100]() const', 'bool std::__1::operator==[abi:ne180100] >(std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&)', 'std::__1::unique_ptr ::RouterData>::Node, std::__1::default_delete ::RouterData>::Node> >::operator->[abi:ne180100]() const', 'bool std::__1::operator!=[abi:ne180100] ::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::vector ::RouterData>::Node, std::__1::default_delete ::RouterData>::Node> >, std::__1::allocator ::RouterData>::Node, std::__1::default_delete ::RouterData>::Node> > > >::begin[abi:ne180100]()', 'std::__1::vector ::RouterData>::Node, std::__1::default_delete ::RouterData>::Node> >, std::__1::allocator ::RouterData>::Node, std::__1::default_delete ::RouterData>::Node> > > >::end[abi:ne180100]()']

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 83 1163 uWS::HttpResponse ::internalEnd(std::__1::basic_string_view >,unsignedlong,bool,bool,bool) call site: 00000 /src/uWebSockets/fuzzing/../src/HttpResponse.h:97
0 0 None 34 238 uWS::HttpContext ::onHttp(std::__1::basic_string ,std::__1::allocator >,std::__1::basic_string ,std::__1::allocator >,ofats::any_invocable *,uWS::HttpRequest*)>&&,bool) call site: 00000 /src/uWebSockets/fuzzing/../src/HttpContext.h:439
0 0 None 12 12 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:364
0 0 None 10 10 autouWS::HttpRouter ::RouterData>::getNode(uWS::HttpRouter ::RouterData>::Node*,std::__1::basic_string ,std::__1::allocator >,bool)::{lambda(auto:1&,auto:2&)#1}::operator() ::RouterData>::Node,std::__1::default_delete ::RouterData>::Node>>const,std::__1::default_delete ::RouterData>::Node>>(std::__1::unique_ptr ::RouterData>::Node,std::__1::default_delete ::RouterData>::Node>>const&,std::__1::default_delete ::RouterData>::Node>&)const call site: 00000 /src/uWebSockets/fuzzing/../src/HttpRouter.h:93
0 0 None 4 4 uWS::ChunkIterator::operator*() call site: 00000 /src/uWebSockets/fuzzing/./../src/ChunkedEncoding.h:218

Runtime coverage analysis

Covered functions
351
Functions that are reachable but not covered
72
Reachable functions
272
Percentage of reachable functions covered
73.53%
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 8
/src/uWebSockets/fuzzing/../src/Loop.h 14
/src/uWebSockets/fuzzing/../uSockets/src/loop.c 14
/src/uWebSockets/fuzzing/../uSockets/src/eventing/epoll_kqueue.c 22
/src/uWebSockets/fuzzing/../src/LoopData.h 3
/src/uWebSockets/fuzzing/../src/MoveOnlyFunction.h 33
/src/uWebSockets/fuzzing/../src/HttpContext.h 15
/src/uWebSockets/fuzzing/../uSockets/src/context.c 13
/src/uWebSockets/fuzzing/../src/HttpContextData.h 2
/src/uWebSockets/fuzzing/../src/HttpRouter.h 12
/src/uWebSockets/fuzzing/../uSockets/src/bsd.c 11
/src/uWebSockets/fuzzing/../src/TopicTree.h 1
/src/uWebSockets/fuzzing/../uSockets/src/socket.c 6
/usr/include/x86_64-linux-gnu/bits/byteswap.h 1

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 0 171 23.7%
gold [1:9] 2 0.27%
yellow [10:29] 0 0.0%
greenyellow [30:49] 0 0.0%
lawngreen 50+ 548 76.0%
All colors 721 100

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
164 164 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})']

164 164 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:168
78 80 2 :

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

78 80 uWS::HttpContext ::init()::{lambda(us_socket_t*)#1}::operator()(us_socket_t*)const call site: 00000 /src/uWebSockets/fuzzing/../src/HttpContext.h:333
35 35 1 :

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

35 358 uWS::WebSocketProtocol >::consumeContinuation(char*&,unsignedint&,uWS::WebSocketState *,void*) call site: 00000 /src/uWebSockets/fuzzing/../src/WebSocketProtocol.h:437
24 41 5 :

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

24 43 us_internal_dispatch_ready_poll call site: 00643 /src/uWebSockets/fuzzing/../uSockets/src/loop.c:242
4 10 9 :

['std::__1::optional > >::optional[abi:ne180100]()', 'uWS::InflationStream::inflate(uWS::ZlibContext*, std::__1::basic_string_view >, unsigned long, bool)', 'std::__1::optional > >::operator->[abi:ne180100]()', 'std::__1::__optional_storage_base >, false>::has_value[abi:ne180100]() const', 'us_socket_context_loop', 'std::__1::basic_string_view >::data[abi:ne180100]() const', 'std::__1::basic_string_view >::length[abi:ne180100]() const', 'us_socket_context', 'us_loop_ext']

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 , std::__1::allocator >::append(char const*)', 'std::__1::optional > >::optional[abi:ne180100]()', 'uWS::InflationStream::inflate(uWS::ZlibContext*, std::__1::basic_string_view >, unsigned long, bool)', 'std::__1::optional > >::operator->[abi:ne180100]()', 'us_socket_context_loop', 'std::__1::__optional_storage_base >, false>::has_value[abi:ne180100]() const', 'std::__1::basic_string_view >::data[abi:ne180100]() const', 'std::__1::basic_string_view >::length[abi:ne180100]() const', 'us_socket_context', 'us_loop_ext']

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 >::length[abi:ne180100]() const', 'std::__1::basic_string_view >::data[abi:ne180100]() 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:423
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 69 2 :

['uWS::AsyncSocket ::write(char const*, int, bool, int)', 'us_socket_timeout']

0 69 autouWS::WebSocketContext ::init()::{lambda(auto:1*)#4}::operator() (us_socket_t*)const call site: 00000 /src/uWebSockets/fuzzing/../src/WebSocketContext.h:395
0 67 3 :

['uWS::AsyncSocket ::uncork(char const*, int, bool)', 'std::__1::tuple_element<0ul, std::__1::pair >::type&& std::__1::get[abi:ne180100]<0ul, int, bool>(std::__1::pair &&)', 'std::__1::tuple_element<1ul, std::__1::pair >::type&& std::__1::get[abi:ne180100]<1ul, int, bool>(std::__1::pair &&)']

0 75 uWS::WebSocket ::send(std::__1::basic_string_view >,uWS::OpCode,int,bool) call site: 00000 /src/uWebSockets/fuzzing/../src/WebSocket.h:197

Runtime coverage analysis

Covered functions
720
Functions that are reachable but not covered
171
Reachable functions
697
Percentage of reachable functions covered
75.47%
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 2
/src/uWebSockets/fuzzing/../src/App.h 11
/src/uWebSockets/fuzzing/../src/Loop.h 16
/src/uWebSockets/fuzzing/../uSockets/src/loop.c 14
/src/uWebSockets/fuzzing/../uSockets/src/eventing/epoll_kqueue.c 22
/src/uWebSockets/fuzzing/../src/LoopData.h 3
/src/uWebSockets/fuzzing/../src/MoveOnlyFunction.h 132
/src/uWebSockets/fuzzing/../src/HttpContext.h 15
/src/uWebSockets/fuzzing/../uSockets/src/context.c 16
/src/uWebSockets/fuzzing/../src/HttpContextData.h 2
/src/uWebSockets/fuzzing/../src/HttpRouter.h 12
/src/uWebSockets/fuzzing/../src/TopicTree.h 8
/src/uWebSockets/fuzzing/../src/WebSocketContext.h 19
/src/uWebSockets/fuzzing/../src/WebSocketContextData.h 2
/src/uWebSockets/fuzzing/../uSockets/src/socket.c 10
/src/uWebSockets/fuzzing/../src/WebSocket.h 3
/src/uWebSockets/fuzzing/../src/WebSocketData.h 1
/src/uWebSockets/fuzzing/../src/AsyncSocketData.h 10
/src/uWebSockets/fuzzing/../src/AsyncSocket.h 11
/src/uWebSockets/fuzzing/../src/WebSocketProtocol.h 45
/src/uWebSockets/fuzzing/../uSockets/src/bsd.c 14
/src/uWebSockets/fuzzing/../src/PerMessageDeflate.h 3
/usr/include/x86_64-linux-gnu/bits/byteswap.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 0 180 23.8%
gold [1:9] 1 0.13%
yellow [10:29] 1 0.13%
greenyellow [30:49] 0 0.0%
lawngreen 50+ 574 75.9%
All colors 756 100

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
184 184 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})']

184 184 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:392
78 80 2 :

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

78 80 uWS::HttpContext ::init()::{lambda(us_socket_t*)#1}::operator()(us_socket_t*)const call site: 00000 /src/uWebSockets/fuzzing/../src/HttpContext.h:333
38 44 3 :

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

38 61 uWS::WebSocket ::send(std::__1::basic_string_view >,uWS::OpCode,int,bool) call site: 00000 /src/uWebSockets/fuzzing/../src/WebSocket.h:137
38 44 3 :

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

38 61 uWS::WebSocket ::send(std::__1::basic_string_view >,uWS::OpCode,int,bool) call site: 00000 /src/uWebSockets/fuzzing/../src/WebSocket.h:137
35 35 1 :

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

35 385 uWS::WebSocketProtocol >::consumeContinuation(char*&,unsignedint&,uWS::WebSocketState *,void*) call site: 00000 /src/uWebSockets/fuzzing/../src/WebSocketProtocol.h:437
24 41 5 :

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

24 43 us_internal_dispatch_ready_poll call site: 00695 /src/uWebSockets/fuzzing/../uSockets/src/loop.c:242
4 4 3 :

['ofats::any_invocable *, uWS::HttpRequest*, us_socket_context_t*)>::operator()(uWS::HttpResponse *, uWS::HttpRequest*, us_socket_context_t*)', 'std::__1::basic_string_view >::length[abi:ne180100]() const', 'std::__1::basic_string_view >::data[abi:ne180100]() const']

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:423
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 :

['free', 'fwrite']

2 439 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
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:358

Runtime coverage analysis

Covered functions
789
Functions that are reachable but not covered
170
Reachable functions
729
Percentage of reachable functions covered
76.68%
NB: The sum of covered functions and functions that are reachable but not covered need not be equal to Reachable functions . This is because the reachability analysis is an approximation and thus at runtime some functions may be covered that are not included in the reachability analysis. This is a limitation of our static analysis capabilities.
Warning: The number of covered functions are larger than the number of reachable functions. This means that there are more functions covered at runtime than are extracted using static analysis. This is likely a result of the static analysis component failing to extract the right call graph or the coverage runtime being compiled with sanitizers in code that the static analysis has not analysed. This can happen if lto/gold is not used in all places that coverage instrumentation is used.
Function name source code lines source lines hit percentage hit

Files reached

filename functions hit
/src/uWebSockets/fuzzing/./libEpollFuzzer/epoll_fuzzer.h 3
/src/uWebSockets/fuzzing/EpollEchoServer.cpp 2
/src/uWebSockets/fuzzing/../src/App.h 12
/src/uWebSockets/fuzzing/../src/Loop.h 16
/src/uWebSockets/fuzzing/../uSockets/src/loop.c 14
/src/uWebSockets/fuzzing/../uSockets/src/eventing/epoll_kqueue.c 22
/src/uWebSockets/fuzzing/../src/LoopData.h 3
/src/uWebSockets/fuzzing/../src/MoveOnlyFunction.h 143
/src/uWebSockets/fuzzing/../src/HttpContext.h 15
/src/uWebSockets/fuzzing/../uSockets/src/context.c 16
/src/uWebSockets/fuzzing/../src/HttpContextData.h 2
/src/uWebSockets/fuzzing/../src/HttpRouter.h 12
/src/uWebSockets/fuzzing/../src/TopicTree.h 8
/src/uWebSockets/fuzzing/../src/WebSocketContext.h 19
/src/uWebSockets/fuzzing/../src/WebSocketContextData.h 2
/src/uWebSockets/fuzzing/../uSockets/src/socket.c 11
/src/uWebSockets/fuzzing/../src/WebSocket.h 3
/src/uWebSockets/fuzzing/../src/WebSocketData.h 1
/src/uWebSockets/fuzzing/../src/AsyncSocketData.h 10
/src/uWebSockets/fuzzing/../src/AsyncSocket.h 12
/src/uWebSockets/fuzzing/../src/WebSocketProtocol.h 45
/src/uWebSockets/fuzzing/../uSockets/src/bsd.c 15
/src/uWebSockets/fuzzing/../src/PerMessageDeflate.h 4
/usr/include/x86_64-linux-gnu/bits/byteswap.h 1

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 0 187 22.8%
gold [1:9] 0 0.0%
yellow [10:29] 1 0.12%
greenyellow [30:49] 0 0.0%
lawngreen 50+ 630 77.0%
All colors 818 100

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
78 80 2 :

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

78 80 uWS::HttpContext ::init()::{lambda(us_socket_t*)#1}::operator()(us_socket_t*)const call site: 00000 /src/uWebSockets/fuzzing/../src/HttpContext.h:333
35 35 1 :

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

35 385 uWS::WebSocketProtocol >::consumeContinuation(char*&,unsignedint&,uWS::WebSocketState *,void*) call site: 00000 /src/uWebSockets/fuzzing/../src/WebSocketProtocol.h:437
4 8 13 :

['std::__1::__tree_const_iterator *, long>::operator++[abi:ne180100]()', 'std::__1::__tree_const_iterator *, long>::operator*[abi:ne180100]() const', 'std::__1::unordered_set , std::__1::equal_to , std::__1::allocator >::size[abi:ne180100]() const', 'std::__1::set , std::__1::allocator >::end[abi:ne180100]()', 'std::__1::basic_string , std::__1::allocator >::operator std::__1::basic_string_view >[abi:ne180100]() const', 'operator delete(void*)', 'std::__1::set , std::__1::allocator >::begin[abi:ne180100]()', 'uWS::Subscriber::~Subscriber()', 'uWS::TopicTree ::unlinkDrainableSubscriber(uWS::Subscriber*)', 'std::__1::unordered_map >, std::__1::unique_ptr >, std::__1::hash > >, std::__1::equal_to > >, std::__1::allocator > const, std::__1::unique_ptr > > > >::erase[abi:ne180100](std::__1::basic_string_view > const&)', 'std::__1::unordered_set , std::__1::equal_to , std::__1::allocator >::erase[abi:ne180100](uWS::Subscriber* const&)', 'uWS::Subscriber::needsDrainage()', 'std::__1::operator!=[abi:ne180100](std::__1::__tree_const_iterator *, long> const&, std::__1::__tree_const_iterator *, long> const&)']

4 8 uWS::TopicTree ::freeSubscriber(uWS::Subscriber*) call site: 00000 /src/uWebSockets/fuzzing/../src/TopicTree.h:226
4 4 8 :

['std::__1::__tree_const_iterator *, long>::operator++[abi:ne180100]()', 'std::__1::unordered_set , std::__1::equal_to , std::__1::allocator >::size[abi:ne180100]() const', 'std::__1::__tree_const_iterator *, long>::operator*[abi:ne180100]() const', 'std::__1::set , std::__1::allocator >::end[abi:ne180100]()', 'std::__1::basic_string , std::__1::allocator >::operator std::__1::basic_string_view >[abi:ne180100]() const', 'ofats::any_invocable *, std::__1::basic_string_view >, int, int)>::operator()(uWS::WebSocket *, std::__1::basic_string_view >, int, int)', 'std::__1::set , std::__1::allocator >::begin[abi:ne180100]()', 'std::__1::operator!=[abi:ne180100](std::__1::__tree_const_iterator *, long> const&, std::__1::__tree_const_iterator *, long> const&)']

6 43 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++[abi:ne180100]()', 'std::__1::unordered_set , std::__1::equal_to , std::__1::allocator >::size[abi:ne180100]() const', 'std::__1::__tree_const_iterator *, long>::operator*[abi:ne180100]() const', 'std::__1::set , std::__1::allocator >::end[abi:ne180100]()', 'std::__1::basic_string , std::__1::allocator >::operator std::__1::basic_string_view >[abi:ne180100]() const', 'ofats::any_invocable *, std::__1::basic_string_view >, int, int)>::operator()(uWS::WebSocket *, std::__1::basic_string_view >, int, int)', 'std::__1::set , std::__1::allocator >::begin[abi:ne180100]()', 'std::__1::operator!=[abi:ne180100](std::__1::__tree_const_iterator *, long> const&, std::__1::__tree_const_iterator *, long> const&)']

6 32 uWS::WebSocket ::end(int,std::__1::basic_string_view >) call site: 00000 /src/uWebSockets/fuzzing/../src/WebSocket.h:254
4 4 3 :

['ofats::any_invocable *, uWS::HttpRequest*, us_socket_context_t*)>::operator()(uWS::HttpResponse *, uWS::HttpRequest*, us_socket_context_t*)', 'std::__1::basic_string_view >::length[abi:ne180100]() const', 'std::__1::basic_string_view >::data[abi:ne180100]() const']

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:423
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
0 160 10 :

['uWS::AsyncSocket ::close()', 'uWS::AsyncSocket ::timeout(unsigned int)', 'uWS::AsyncSocket ::cork()', 'std::__1::tuple_element<0ul, std::__1::pair >::type&& std::__1::get[abi:ne180100]<0ul, int, bool>(std::__1::pair &&)', 'uWS::AsyncSocket ::uncork(char const*, int, bool)', 'uWS::AsyncSocket ::getLoopData()', 'uWS::AsyncSocket ::shutdown()', 'uWS::AsyncSocket ::getBufferedAmount()', 'uWS::HttpResponse ::getHttpResponseData()', 'std::__1::tuple_element<1ul, std::__1::pair >::type&& std::__1::get[abi:ne180100]<1ul, int, bool>(std::__1::pair &&)']

0 164 uWS::HttpResponse ::cork(ofats::any_invocable &&) call site: 00000 /src/uWebSockets/fuzzing/../src/HttpResponse.h:502
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:358
0 12 14 :

['uWS::HttpRouter ::RouterData>::getUrlSegment(int)', 'std::__1::__wrap_iter ::RouterData>::Node, std::__1::default_delete ::RouterData>::Node> >*>::operator*[abi:ne180100]() const', 'std::__1::vector >::operator[][abi:ne180100](unsigned long)', 'std::__1::unique_ptr ::RouterData>::Node, std::__1::default_delete ::RouterData>::Node> >::get[abi:ne180100]() const', '_ZNSt3__112basic_stringIcNS_11char_traitsIcEENS_9allocatorIcEEEC2INS_17basic_string_viewIcS2_EETnNS_9enable_ifIXaasr33__can_be_converted_to_string_viewIcS2_T_EE5valuentsr17__is_same_uncvrefISA_S5_EE5valueEiE4typeELi0EEERKSA_', 'std::__1::basic_string , std::__1::allocator >::operator[][abi:ne180100](unsigned long)', 'std::__1::__wrap_iter ::RouterData>::Node, std::__1::default_delete ::RouterData>::Node> >*>::operator++[abi:ne180100]()', 'std::__1::vector >::size[abi:ne180100]() const', 'std::__1::basic_string , std::__1::allocator >::length[abi:ne180100]() const', 'bool std::__1::operator==[abi:ne180100] >(std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&)', 'std::__1::unique_ptr ::RouterData>::Node, std::__1::default_delete ::RouterData>::Node> >::operator->[abi:ne180100]() const', 'bool std::__1::operator!=[abi:ne180100] ::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::vector ::RouterData>::Node, std::__1::default_delete ::RouterData>::Node> >, std::__1::allocator ::RouterData>::Node, std::__1::default_delete ::RouterData>::Node> > > >::begin[abi:ne180100]()', 'std::__1::vector ::RouterData>::Node, std::__1::default_delete ::RouterData>::Node> >, std::__1::allocator ::RouterData>::Node, std::__1::default_delete ::RouterData>::Node> > > >::end[abi:ne180100]()']

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

Runtime coverage analysis

Covered functions
840
Functions that are reachable but not covered
181
Reachable functions
759
Percentage of reachable functions covered
76.15%
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 20
/src/uWebSockets/fuzzing/../src/Loop.h 17
/src/uWebSockets/fuzzing/../uSockets/src/loop.c 15
/src/uWebSockets/fuzzing/../uSockets/src/eventing/epoll_kqueue.c 22
/src/uWebSockets/fuzzing/../src/LoopData.h 3
/src/uWebSockets/fuzzing/../src/MoveOnlyFunction.h 143
/src/uWebSockets/fuzzing/../src/HttpContext.h 15
/src/uWebSockets/fuzzing/../uSockets/src/context.c 23
/src/uWebSockets/fuzzing/../src/HttpContextData.h 2
/src/uWebSockets/fuzzing/../src/HttpRouter.h 12
/src/uWebSockets/fuzzing/../src/TopicTree.h 8
/src/uWebSockets/fuzzing/../src/WebSocketContext.h 19
/src/uWebSockets/fuzzing/../src/WebSocketContextData.h 2
/src/uWebSockets/fuzzing/../uSockets/src/socket.c 13
/src/uWebSockets/fuzzing/../src/WebSocket.h 3
/src/uWebSockets/fuzzing/../src/WebSocketData.h 1
/src/uWebSockets/fuzzing/../src/AsyncSocketData.h 10
/src/uWebSockets/fuzzing/../src/AsyncSocket.h 12
/src/uWebSockets/fuzzing/../src/WebSocketProtocol.h 45
/src/uWebSockets/fuzzing/../uSockets/src/bsd.c 18
/src/uWebSockets/fuzzing/../src/PerMessageDeflate.h 4
/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 ['N/A', 'N/A', 'N/A'] 26 0 158 16 4 549 0 791 587
uWS::HttpContext ::init()::{lambda(us_socket_t*,char*,int)#1}::__invoke(us_socket_t*,char*,int) /src/uWebSockets/fuzzing/../src/HttpContext.h 3 ['N/A', 'N/A', 'int'] 7 0 16 3 2 176 0 414 268
StaticData::StaticData() /src/uWebSockets/fuzzing/Http.cpp 1 ['N/A'] 5 0 259 60 41 58 2 233 227
uWS::WebSocketProtocol ::consume(char*,unsignedint,uWS::WebSocketState *,void*) /src/uWebSockets/fuzzing/./../src/WebSocketProtocol.h 4 ['N/A', 'int', 'N/A', 'N/A'] 18 0 292 57 24 91 0 205 156
autotest()::$_1::operator() >(uWS::WebSocket *,std::__1::basic_string_view >,uWS::OpCode)const /src/uWebSockets/fuzzing/EpollEchoServer.cpp 4 ['N/A', 'N/A', 'size_t', 'char'] 10 0 95 18 8 151 0 333 85
autotest()::$_1::operator() ,uWS::HttpRequest>(uWS::HttpResponse *,uWS::HttpRequest*)const /src/uWebSockets/fuzzing/EpollHelloWorld.cpp 1 ['N/A'] 7 0 50 8 7 51 0 117 67
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 ['N/A', 'N/A', 'N/A'] 4 0 167 32 13 59 0 131 65
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 ['N/A', 'N/A', 'N/A'] 26 0 158 16 4 547 0 789 57
uWS::HttpContext ::init()::{lambda(us_socket_t*)#1}::__invoke(us_socket_t*) /src/uWebSockets/fuzzing/../src/HttpContext.h 1 ['N/A'] 8 0 14 3 2 92 0 196 53
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 ['N/A', 'N/A', 'N/A'] 4 0 152 29 12 58 0 128 52

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

Functions statically reachable by fuzzers
69.0%
1123 / 1629
Cyclomatic complexity statically reachable by fuzzers
73.0%
4604 / 6293

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/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/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/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/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/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_internal_dispatch_ready_poll', 'us_socket_context_free', 'us_internal_loop_pre', 'uWS::Loop::free()', 'uWS::Loop::preCb(us_loop_t*)', 'uWS::HttpContext::create(uWS::Loop*, us_socket_context_options_t)', 'ofats::any_detail::any_invocable_impl::any_invocable_impl()', 'uWS::TemplatedApp::TemplatedApp(uWS::SocketContextOptions)', 'uWS::HttpRouter::RouterData>::findHandler(std::__1::basic_string, std::__1::allocator >, std::__1::basic_string, std::__1::allocator >, unsigned int)']

/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::WebSocketProtocol >::consumeContinuation(char*&, unsigned int&, uWS::WebSocketState*, void*)', 'uWS::TemplatedApp&& uWS::TemplatedApp::ws(std::__1::basic_string, std::__1::allocator >, uWS::TemplatedApp::WebSocketBehavior&&)', 'uWS::WebSocketContext::create(uWS::Loop*, us_socket_context_t*, uWS::TopicTree*)', 'us_internal_dispatch_ready_poll', 'uWS::TemplatedApp&& uWS::TemplatedApp::ws(std::__1::basic_string, std::__1::allocator >, uWS::TemplatedApp::WebSocketBehavior&&)', 'uWS::WebSocketContext::handleFragment(char*, unsigned long, unsigned int, int, bool, uWS::WebSocketState*, void*)', 'uWS::WebSocketContext::handleFragment(char*, unsigned long, unsigned int, int, bool, uWS::WebSocketState*, void*)', 'uWS::AsyncSocket::getBufferedAmount()', 'ofats::any_detail::any_invocable_impl::~any_invocable_impl()', 'us_internal_loop_pre']

/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::WebSocketProtocol >::consumeContinuation(char*&, unsigned int&, uWS::WebSocketState*, void*)', 'uWS::TemplatedApp&& uWS::TemplatedApp::ws(std::__1::basic_string, std::__1::allocator >, uWS::TemplatedApp::WebSocketBehavior&&)', 'uWS::WebSocketContext::create(uWS::Loop*, us_socket_context_t*, uWS::TopicTree*)', 'us_internal_dispatch_ready_poll', 'uWS::TemplatedApp&& uWS::TemplatedApp::ws(std::__1::basic_string, std::__1::allocator >, uWS::TemplatedApp::WebSocketBehavior&&)', 'uWS::AsyncSocket::getBufferedAmount()', 'us_poll_change', 'test()', 'unsigned long uWS::protocol::formatMessage(char*, char const*, unsigned long, uWS::OpCode, unsigned long, bool, bool)', 'us_socket_is_shut_down']

/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::WebSocketProtocol >::consumeContinuation(char*&, unsigned int&, uWS::WebSocketState*, void*)', 'ofats::any_detail::any_invocable_impl*, uWS::HttpRequest*, us_socket_context_t*>::any_invocable_impl(decltype(nullptr))', 'uWS::TemplatedApp&& uWS::TemplatedApp::ws(std::__1::basic_string, std::__1::allocator >, uWS::TemplatedApp::WebSocketBehavior&&)', '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&&)', 'us_poll_change', 'uWS::AsyncSocket::isCorked()', 'unsigned long uWS::protocol::formatMessage(char*, char const*, unsigned long, uWS::OpCode, unsigned long, bool, bool)', 'us_socket_is_shut_down', 'us_internal_loop_pre']

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
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,int,bool) 69 33 47.82% []
unsignedlonguWS::protocol::formatMessage (char*,charconst*,unsignedlong,uWS::OpCode,unsignedlong,bool,bool) 38 20 52.63% ['EpollEchoServerPubSub', 'EpollEchoServer', 'EpollHelloWorld']

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

Directories in report

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

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
QueryParser fuzzerLogFile-0-7X4UOKdErc.data fuzzerLogFile-0-7X4UOKdErc.data.yaml QueryParser.covreport
TopicTree fuzzerLogFile-0-ynqmb9Cius.data fuzzerLogFile-0-ynqmb9Cius.data.yaml TopicTree.covreport
Extensions fuzzerLogFile-0-6LONqzzrdM.data fuzzerLogFile-0-6LONqzzrdM.data.yaml Extensions.covreport
PerMessageDeflate fuzzerLogFile-0-BPzSHuDEp1.data fuzzerLogFile-0-BPzSHuDEp1.data.yaml PerMessageDeflate.covreport
WebSocket fuzzerLogFile-0-wvsx99L9zO.data fuzzerLogFile-0-wvsx99L9zO.data.yaml WebSocket.covreport
MultipartParser fuzzerLogFile-0-Brg0TUSuRS.data fuzzerLogFile-0-Brg0TUSuRS.data.yaml MultipartParser.covreport
Http fuzzerLogFile-0-DJHBtEd394.data fuzzerLogFile-0-DJHBtEd394.data.yaml Http.covreport
HttpWithProxy fuzzerLogFile-0-izJNAD9WvN.data fuzzerLogFile-0-izJNAD9WvN.data.yaml HttpWithProxy.covreport
AsyncEpollHelloWorld fuzzerLogFile-0-tR9KSSflSF.data fuzzerLogFile-0-tR9KSSflSF.data.yaml AsyncEpollHelloWorld.covreport
EpollEchoServerPubSub fuzzerLogFile-0-TzoK7iC3Ts.data fuzzerLogFile-0-TzoK7iC3Ts.data.yaml EpollEchoServerPubSub.covreport
EpollEchoServer fuzzerLogFile-0-djTo9m1vSZ.data fuzzerLogFile-0-djTo9m1vSZ.data.yaml EpollEchoServer.covreport
EpollHelloWorld fuzzerLogFile-0-ZhoVZWr053.data fuzzerLogFile-0-ZhoVZWr053.data.yaml EpollHelloWorld.covreport