High level conclusions

Fuzzers reach 70.09% code coverage.

Fuzzers reach 68.23% of cyclomatic complexity.

Fuzzers reach 57.00% of all functions.

Reachability and coverage overview

Functions statically reachable by fuzzers

366 / 642

Cyclomatic complexity statically reachable by fuzzers

3371 / 4940

Runtime code coverage of functions

450 / 642

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.

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

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

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

Fuzzer: url_parser_fuzzer

Call tree

The calltree shows the control flow of the fuzzer. This is overlaid with coverage information to display how much of the potential code a fuzzer can reach is in fact covered at runtime. In the following there is a link to a detailed calltree visualisation as well as a bitmap showing a high-level view of the calltree. For further information about these topics please see the glossary for full calltree and calltree overview

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	1	3.57%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	27	96.4%
All colors	28	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	8	httplib::detail::split(char const*, char const*, char, unsigned long, std::__1::function )	call site: 00008

Runtime coverage analysis

Covered functions

27

Functions that are reachable but not covered

4

Reachable functions

39

Percentage of reachable functions covered

89.74%

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/cpp-httplib/test/fuzzing/url_parser_fuzzer.cc	1
/src/cpp-httplib/test/fuzzing/../../httplib.h	18

Fuzzer: header_parser_fuzzer

Call tree

The calltree shows the control flow of the fuzzer. This is overlaid with coverage information to display how much of the potential code a fuzzer can reach is in fact covered at runtime. In the following there is a link to a detailed calltree visualisation as well as a bitmap showing a high-level view of the calltree. For further information about these topics please see the glossary for full calltree and calltree overview

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	1	3.33%
gold	[1:9]	5	16.6%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	1	3.33%
lawngreen	50+	23	76.6%
All colors	30	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	20	httplib::detail::parse_disposition_params(std::__1::basic_string , std::__1::allocator > const&, httplib::detail::insertion_ordered_multimap , std::__1::allocator >, std::__1::equal_to , std::__1::allocator > > >&)	call site: 00020

Runtime coverage analysis

Covered functions

38

Functions that are reachable but not covered

5

Reachable functions

36

Percentage of reachable functions covered

86.11%

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/cpp-httplib/test/fuzzing/header_parser_fuzzer.cc	1
/src/cpp-httplib/test/fuzzing/../../httplib.h	16

Fuzzer: multipart_parser_fuzzer

Call tree

The calltree shows the control flow of the fuzzer. This is overlaid with coverage information to display how much of the potential code a fuzzer can reach is in fact covered at runtime. In the following there is a link to a detailed calltree visualisation as well as a bitmap showing a high-level view of the calltree. For further information about these topics please see the glossary for full calltree and calltree overview

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	43	37.3%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	72	62.6%
All colors	115	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
20	72	httplib::detail::insertion_ordered_multimap , std::__1::allocator >, std::__1::equal_to , std::__1::allocator > > >::make_iter(unsigned long, unsigned long)	call site: 00072
15	56	httplib::detail::FormDataParser::parse_content_disposition(std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator >&) const	call site: 00056
5	49	httplib::detail::FormDataParser::start_with_case_ignore(std::__1::basic_string , std::__1::allocator > const&, char const*, unsigned long) const	call site: 00049
2	112	LLVMFuzzerTestOneInput	call site: 00112
1	2	httplib::detail::FormDataParser::FormDataParser()	call site: 00002

Runtime coverage analysis

Covered functions

40

Functions that are reachable but not covered

42

Reachable functions

126

Percentage of reachable functions covered

66.67%

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.

Function name	source code lines	source lines hit	percentage hit

Files reached

filename	functions hit
/src/cpp-httplib/test/fuzzing/multipart_parser_fuzzer.cc	1
/src/cpp-httplib/test/fuzzing/../../httplib.h	62

Fuzzer: client_fuzzer

Call tree

The calltree shows the control flow of the fuzzer. This is overlaid with coverage information to display how much of the potential code a fuzzer can reach is in fact covered at runtime. In the following there is a link to a detailed calltree visualisation as well as a bitmap showing a high-level view of the calltree. For further information about these topics please see the glossary for full calltree and calltree overview

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	133	31.9%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	283	68.0%
All colors	416	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
21	148	httplib::ClientImpl::write_request(httplib::Stream&, httplib::Request&, bool, httplib::Error&, bool)	call site: 00148	inet_pton
11	227	httplib::ClientImpl::write_request_body(httplib::Stream&, httplib::Request&, httplib::Error&)	call site: 00227	_ZN7httplib6detail11make_uniqueINS0_15gzip_compressorEJEEENSt3__19enable_ifIXntsr3std8is_arrayIT_EE5valueENS3_10unique_ptrIS5_NS3_14default_deleteIS5_EEEEE4typeEDpOT0_
10	26	FuzzableClient::ProcessFuzzedResponse(FuzzedStream&, std::__1::basic_string , std::__1::allocator > const&)	call site: 00026
10	196	httplib::detail::insertion_ordered_multimap , std::__1::allocator >, std::__1::equal_to , std::__1::allocator > > >::end() const	call site: 00196	snprintf
9	138	httplib::ClientImpl::write_request(httplib::Stream&, httplib::Request&, bool, httplib::Error&, bool)	call site: 00138
6	131	httplib::detail::add_default_user_agent_header(httplib::Request&)	call site: 00131
6	246	bool httplib::detail::write_content_with_progress (httplib::Stream&, std::__1::function const&, unsigned long, unsigned long, httplib::ClientImpl::write_content_with_provider(httplib::Stream&, httplib::Request const&, httplib::Error&) const::{lambda()#1}, std::__1 const&, httplib::Error&)	call site: 00246
6	302	httplib::ClientImpl::process_request(httplib::Stream&, httplib::Request&, httplib::Response&, bool, httplib::Error&)	call site: 00302
5	83	httplib::detail::get_header_value(httplib::detail::insertion_ordered_multimap , std::__1::allocator >, httplib::detail::case_ignore::equal_to> const&, std::__1::basic_string , std::__1::allocator > const&, char const*, unsigned long)	call site: 00083	__cxa_allocate_exception
4	17	httplib::ClientImpl::close_socket(httplib::ClientImpl::Socket&)	call site: 00017	close
4	109	httplib::ClientImpl::prepare_default_headers(httplib::Request&, bool, std::__1::basic_string , std::__1::allocator > const&)	call site: 00109
4	173	httplib::detail::encode_request_target(std::__1::basic_string , std::__1::allocator > const&, bool)	call site: 00173	snprintf

Runtime coverage analysis

Covered functions

162

Functions that are reachable but not covered

110

Reachable functions

407

Percentage of reachable functions covered

72.97%

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/cpp-httplib/test/fuzzing/client_fuzzer.cc	6
/src/cpp-httplib/test/fuzzing/../../httplib.h	194
/usr/local/bin/../include/c++/v1/stdexcept	1

Fuzzer: server_fuzzer

Call tree

The calltree shows the control flow of the fuzzer. This is overlaid with coverage information to display how much of the potential code a fuzzer can reach is in fact covered at runtime. In the following there is a link to a detailed calltree visualisation as well as a bitmap showing a high-level view of the calltree. For further information about these topics please see the glossary for full calltree and calltree overview

Call tree overview bitmap:

The distribution of callsites in terms of coloring is

Color	Runtime hitcount	Callsite count	Percentage
red	0	189	30.0%
gold	[1:9]	20	3.17%
yellow	[10:29]	6	0.95%
greenyellow	[30:49]	20	3.17%
lawngreen	50+	394	62.6%
All colors	629	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
28	355	httplib::detail::is_websocket_upgrade(httplib::Request const&)	call site: 00355	__cxa_guard_acquire
25	425	httplib::detail::split_find(char const*, char const*, char, unsigned long, std::__1::function )	call site: 00425	timegm
22	401	httplib::detail::insertion_ordered_multimap , std::__1::allocator >, httplib::detail::case_ignore::equal_to>::begin() const	call site: 00401	gmtime_r
14	239	bool httplib::detail::process_multipart_ranges_data , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&)::{lambda()#1}>(httplib::Stream&, httplib::Request const&, httplib::Response&, std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&, unsigned long, httplib::Server::write_content_with_provider(httplib::Stream&, httplib::Request const&, httplib::Response&, std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&)::{lambda()#1} const&)::{lambda(std::__1::basic_string , std::__1::allocator > const&)#1}, httplib::detail::write_multipart_ranges_data<{lambda()#1}>(httplib::Stream&, httplib::Request const&, httplib::Response&, std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&, unsigned long, {lambda()#1} const)::{lambda(std::__1::basic_string , std::__1::allocator > const&)#2}, httplib::detail::write_multipart_ranges_data<{lambda()#1}>(httplib::Stream&, httplib::Request const&, httplib::Response&, std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&, unsigned long, {lambda()#1} const)::{lambda(unsigned long, unsigned long)#1}>(httplib::Request const&, std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&, unsigned long, httplib::Server::write_content_with_provider(httplib::Stream&, httplib::Request const&, httplib::Response&, std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&)::{lambda()#1}, httplib::detail::write_multipart_ranges_data<{lambda()#1}>(httplib::Stream&, httplib::Request const&, httplib::Response&, std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&, unsigned long, {lambda()#1} const)::{lambda(std::__1::basic_string , std::__1::allocator > const&)#2}, httplib::detail::write_multipart_ranges_data<{lambda()#1}>(httplib::Stream&, httplib::Request const&, httplib::Response&, std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&, unsigned long, {lambda()#1} const)::{lambda(unsigned long, unsigned long)#1})	call site: 00239	_ZN7httplib6detail11make_uniqueINS0_12nocompressorEJEEENSt3__19enable_ifIXntsr3std8is_arrayIT_EE5valueENS3_10unique_ptrIS5_NS3_14default_deleteIS5_EEEEE4typeEDpOT0_
14	385	httplib::Server::routing(httplib::Request&, httplib::Response&, httplib::Stream&)	call site: 00385	__assert_fail
13	208	httplib::Server::write_response_core(httplib::Stream&, bool, httplib::Request const&, httplib::Response&, bool)	call site: 00208
12	598	httplib::Server::process_request(httplib::Stream&, std::__1::basic_string , std::__1::allocator > const&, int, std::__1::basic_string , std::__1::allocator > const&, int, bool, bool&, std::__1::function const&, bool*)	call site: 00598	__cxa_end_catch
10	13	httplib::Server::process_request(httplib::Stream&, std::__1::basic_string , std::__1::allocator > const&, int, std::__1::basic_string , std::__1::allocator > const&, int, bool, bool&, std::__1::function const&, bool*)	call site: 00013
7	494	httplib::detail::is_connection_persistent(httplib::Request const&)	call site: 00494	poll
5	94	httplib::detail::is_prohibited_header_name(std::__1::basic_string , std::__1::allocator > const&)	call site: 00094	__cxa_allocate_exception
5	144	bool httplib::detail::process_multipart_ranges_data , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&, unsigned long)::{lambda(std::__1::basic_string , std::__1::allocator > const&)#1}, httplib::detail::get_multipart_ranges_data_length(httplib::Request const&, std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&, unsigned long)::{lambda(std::__1::basic_string , std::__1::allocator > const&)#2}, httplib::detail::get_multipart_ranges_data_length(httplib::Request const&, std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&, unsigned long)::{lambda(unsigned long, unsigned long)#1}>(httplib::Request const&, std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&, unsigned long, httplib::detail::get_multipart_ranges_data_length(httplib::Request const&, std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&, unsigned long)::{lambda(std::__1::basic_string , std::__1::allocator > const&)#1}, httplib::detail::get_multipart_ranges_data_length(httplib::Request const&, std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&, unsigned long)::{lambda(std::__1::basic_string , std::__1::allocator > const&)#2}, httplib::detail::get_multipart_ranges_data_length(httplib::Request const&, std::__1::basic_string , std::__1::allocator > const&, std::__1::basic_string , std::__1::allocator > const&, unsigned long)::{lambda(unsigned long, unsigned long)#1})	call site: 00144
4	123	httplib::detail::get_range_offset_and_length(std::__1::pair , unsigned long)	call site: 00123

Runtime coverage analysis

Covered functions

288

Functions that are reachable but not covered

184

Reachable functions

564

Percentage of reachable functions covered

67.38%

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/cpp-httplib/test/fuzzing/server_fuzzer.cc	4
/src/cpp-httplib/test/fuzzing/../../httplib.h	264
/usr/local/bin/../include/c++/v1/stdexcept	1

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
LLVMFuzzerInitialize	/src/cpp-httplib/test/fuzzing/server_fuzzer.cc	2	['N/A', 'N/A']	7	0	199	34	23	35	0	142	132
httplib::ClientImpl::create_and_connect_socket(httplib::ClientImpl::Socket&,httplib::Error&)	/src/cpp-httplib/test/fuzzing/../../httplib.h	3	['N/A', 'N/A', 'N/A']	9	0	42	6	3	78	0	182	120
httplib::Server::process_and_close_socket(int)	/src/cpp-httplib/test/fuzzing/../../httplib.h	2	['N/A', 'int']	21	0	104	10	8	599	0	2580	99
httplib::ws::WebSocket::start_heartbeat()::{lambda()#1}::operator()()const	/src/cpp-httplib/test/fuzzing/../../httplib.h	1	['N/A']	2	0	155	34	29	8	0	97	97
httplib::detail::write_content_chunked ,std::__1::allocator >const&,std::__1::basic_string ,std::__1::allocator >const&)::{lambda()#1},httplib::detail::compressor>(httplib::Stream&,std::__1::function const&,httplib::Server::write_content_with_provider(httplib::Stream&,httplib::Requestconst&,httplib::Response&,std::__1::basic_string ,std::__1::allocator >const&,std::__1::basic_string ,std::__1::allocator >const&)::{lambda()#1}const&,httplib::detail::compressor&,httplib::Error&)::{lambda(httplib::detail::insertion_ordered_multimap ,std::__1::allocator >,httplib::detail::case_ignore::equal_to>const&)#1}::operator()(httplib::detail::insertion_ordered_multimap ,std::__1::allocator >,httplib::detail::case_ignore::equal_to>const)const	/src/cpp-httplib/test/fuzzing/../../httplib.h	2	['N/A', 'N/A']	7	0	20	3	2	58	0	157	64
httplib::detail::write_content_chunked (httplib::Stream&,std::__1::function const&,httplib::ClientImpl::write_content_with_provider(httplib::Stream&,httplib::Requestconst&,httplib::Error&)const::{lambda()#1}const&,httplib::detail::compressor&,httplib::Error&)::{lambda(httplib::detail::insertion_ordered_multimap ,httplib::detail::compressor::allocator >,httplib::detail::case_ignore::equal_to>const&)#1}::operator()(httplib::detail::insertion_ordered_multimap ,httplib::detail::compressor::allocator >,httplib::detail::case_ignore::equal_to>const)const	/src/cpp-httplib/test/fuzzing/../../httplib.h	2	['N/A', 'N/A']	7	0	20	3	2	58	0	157	62
httplib::Server::Server()::{lambda()#1}::operator()()const	/src/cpp-httplib/test/fuzzing/../../httplib.h	1	['N/A']	3	0	84	14	14	17	0	74	58
httplib::detail::parse_accept_header(std::__1::basic_string ,std::__1::allocator >const&,std::__1::vector ,std::__1::allocator >,std::__1::allocator ,std::__1::allocator >>>&)::{lambda(charconst*,charconst*)#1}::operator()(charconst*,charconst*)const	/src/cpp-httplib/test/fuzzing/../../httplib.h	3	['N/A', 'N/A', 'N/A']	5	0	161	28	28	22	0	102	46
httplib::ThreadPool::enqueue(std::__1::function )::{lambda()#1}::operator()()const	/src/cpp-httplib/test/fuzzing/../../httplib.h	1	['N/A']	2	0	17	3	2	5	0	39	37
httplib::detail::normalize_query_string(std::__1::basic_string ,std::__1::allocator >const&)::{lambda(charconst*,charconst*)#1}::operator()(charconst*,charconst*)const	/src/cpp-httplib/test/fuzzing/../../httplib.h	3	['N/A', 'N/A', 'N/A']	4	0	176	34	29	19	0	74	35

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

Functions statically reachable by fuzzers

444 / 642

Cyclomatic complexity statically reachable by fuzzers

4083 / 4940

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	Runtime reached by Fuzzers	Combined reached by Fuzzers	Fuzzers runtime hit	Func lines hit %	I Count	BB Count	Cyclomatic complexity	Functions reached	Reached by functions	Accumulated cyclomatic complexity	Undiscovered complexity

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/cpp-httplib/test/fuzzing/url_parser_fuzzer.cc

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=['httplib::detail::split(char const*, char const*, char, unsigned long, std::__1::function)']

/src/cpp-httplib/test/fuzzing/header_parser_fuzzer.cc

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=['httplib::detail::parse_disposition_params(std::__1::basic_string, std::__1::allocator > const&, httplib::detail::insertion_ordered_multimap, std::__1::allocator >, std::__1::equal_to, std::__1::allocator > > >&)']

/src/cpp-httplib/test/fuzzing/multipart_parser_fuzzer.cc

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=['httplib::detail::insertion_ordered_multimap, std::__1::allocator >, std::__1::equal_to, std::__1::allocator > > >::make_iter(unsigned long, unsigned long)', 'httplib::detail::FormDataParser::parse_content_disposition(std::__1::basic_string, std::__1::allocator > const&, std::__1::basic_string, std::__1::allocator >&) const', 'httplib::detail::FormDataParser::start_with_case_ignore(std::__1::basic_string, std::__1::allocator > const&, char const*, unsigned long) const', 'LLVMFuzzerTestOneInput', 'httplib::detail::FormDataParser::FormDataParser()']

/src/cpp-httplib/test/fuzzing/client_fuzzer.cc

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=['httplib::ClientImpl::write_request(httplib::Stream&, httplib::Request&, bool, httplib::Error&, bool)', 'httplib::ClientImpl::write_request_body(httplib::Stream&, httplib::Request&, httplib::Error&)', 'FuzzableClient::ProcessFuzzedResponse(FuzzedStream&, std::__1::basic_string, std::__1::allocator > const&)', 'httplib::detail::insertion_ordered_multimap, std::__1::allocator >, std::__1::equal_to, std::__1::allocator > > >::end() const', 'httplib::ClientImpl::write_request(httplib::Stream&, httplib::Request&, bool, httplib::Error&, bool)', 'httplib::detail::add_default_user_agent_header(httplib::Request&)', 'bool httplib::detail::write_content_with_progress(httplib::Stream&, std::__1::function const&, unsigned long, unsigned long, httplib::ClientImpl::write_content_with_provider(httplib::Stream&, httplib::Request const&, httplib::Error&) const::{lambda()#1}, std::__1 const&, httplib::Error&)', 'httplib::ClientImpl::process_request(httplib::Stream&, httplib::Request&, httplib::Response&, bool, httplib::Error&)', 'httplib::detail::get_header_value(httplib::detail::insertion_ordered_multimap, std::__1::allocator >, httplib::detail::case_ignore::equal_to> const&, std::__1::basic_string, std::__1::allocator > const&, char const*, unsigned long)', 'httplib::ClientImpl::close_socket(httplib::ClientImpl::Socket&)']

/src/cpp-httplib/test/fuzzing/server_fuzzer.cc

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=['httplib::detail::is_websocket_upgrade(httplib::Request const&)', 'httplib::detail::split_find(char const*, char const*, char, unsigned long, std::__1::function)', 'httplib::detail::insertion_ordered_multimap, std::__1::allocator >, httplib::detail::case_ignore::equal_to>::begin() const', 'bool httplib::detail::process_multipart_ranges_data, std::__1::allocator > const&, std::__1::basic_string, std::__1::allocator > const&)::{lambda()#1}>(httplib::Stream&, httplib::Request const&, httplib::Response&, std::__1::basic_string, std::__1::allocator > const&, std::__1::basic_string, std::__1::allocator > const&, unsigned long, httplib::Server::write_content_with_provider(httplib::Stream&, httplib::Request const&, httplib::Response&, std::__1::basic_string, std::__1::allocator > const&, std::__1::basic_string, std::__1::allocator > const&)::{lambda()#1} const&)::{lambda(std::__1::basic_string, std::__1::allocator > const&)#1}, httplib::detail::write_multipart_ranges_data<{lambda()#1}>(httplib::Stream&, httplib::Request const&, httplib::Response&, std::__1::basic_string, std::__1::allocator > const&, std::__1::basic_string, std::__1::allocator > const&, unsigned long, {lambda()#1} const)::{lambda(std::__1::basic_string, std::__1::allocator > const&)#2}, httplib::detail::write_multipart_ranges_data<{lambda()#1}>(httplib::Stream&, httplib::Request const&, httplib::Response&, std::__1::basic_string, std::__1::allocator > const&, std::__1::basic_string, std::__1::allocator > const&, unsigned long, {lambda()#1} const)::{lambda(unsigned long, unsigned long)#1}>(httplib::Request const&, std::__1::basic_string, std::__1::allocator > const&, std::__1::basic_string, std::__1::allocator > const&, unsigned long, httplib::Server::write_content_with_provider(httplib::Stream&, httplib::Request const&, httplib::Response&, std::__1::basic_string, std::__1::allocator > const&, std::__1::basic_string, std::__1::allocator > const&)::{lambda()#1}, httplib::detail::write_multipart_ranges_data<{lambda()#1}>(httplib::Stream&, httplib::Request const&, httplib::Response&, std::__1::basic_string, std::__1::allocator > const&, std::__1::basic_string, std::__1::allocator > const&, unsigned long, {lambda()#1} const)::{lambda(std::__1::basic_string, std::__1::allocator > const&)#2}, httplib::detail::write_multipart_ranges_data<{lambda()#1}>(httplib::Stream&, httplib::Request const&, httplib::Response&, std::__1::basic_string, std::__1::allocator > const&, std::__1::basic_string, std::__1::allocator > const&, unsigned long, {lambda()#1} const)::{lambda(unsigned long, unsigned long)#1})', 'httplib::Server::routing(httplib::Request&, httplib::Response&, httplib::Stream&)', 'httplib::Server::write_response_core(httplib::Stream&, bool, httplib::Request const&, httplib::Response&, bool)', 'httplib::Server::process_request(httplib::Stream&, std::__1::basic_string, std::__1::allocator > const&, int, std::__1::basic_string, std::__1::allocator > const&, int, bool, bool&, std::__1::function const&, bool*)', 'httplib::Server::process_request(httplib::Stream&, std::__1::basic_string, std::__1::allocator > const&, int, std::__1::basic_string, std::__1::allocator > const&, int, bool, bool&, std::__1::function const&, bool*)', 'httplib::detail::is_connection_persistent(httplib::Request const&)', 'httplib::detail::is_prohibited_header_name(std::__1::basic_string, std::__1::allocator > const&)']

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
httplib::ClientImpl::write_request(httplib::Stream&,httplib::Request&,bool,httplib::Error&,bool)	84	36	42.85%	['client_fuzzer']
httplib::detail::stream_line_reader::getline()	55	29	52.72%	['client_fuzzer', 'server_fuzzer']
httplib::ClientImpl::write_request_body(httplib::Stream&,httplib::Request&,httplib::Error&)	31	4	12.90%	['client_fuzzer']
httplib::detail::BodyReader::read(char*,unsignedlong)	60	23	38.33%	['client_fuzzer', 'server_fuzzer']
httplib::Server::process_request(httplib::Stream&,std::__1::basic_string ,std::__1::allocator >const&,int,std::__1::basic_string ,std::__1::allocator >const&,int,bool,bool&,std::__1::function const&,bool*)	233	122	52.36%	['server_fuzzer']
httplib::status_message(int)	74	13	17.56%	['server_fuzzer']
httplib::Server::handle_file_request(httplib::Request&,httplib::Response&)	62	4	6.451%	['server_fuzzer']

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/cpp-httplib/test/fuzzing/header_parser_fuzzer.cc	['header_parser_fuzzer']	['header_parser_fuzzer']
/src/cpp-httplib/test/fuzzing/multipart_parser_fuzzer.cc	['multipart_parser_fuzzer']	['multipart_parser_fuzzer']
/src/cpp-httplib/test/fuzzing/url_parser_fuzzer.cc	['url_parser_fuzzer']	['url_parser_fuzzer']
/usr/local/bin/../include/c++/v1/istream	[]	[]
/usr/local/bin/../include/c++/v1/string	[]	[]
/src/cpp-httplib/test/fuzzing/client_fuzzer.cc	['client_fuzzer']	['client_fuzzer']
/src/cpp-httplib/test/fuzzing/server_fuzzer.cc	['server_fuzzer']	['server_fuzzer']
/usr/local/bin/../include/c++/v1/__exception/exception.h	[]	[]
/usr/local/bin/../include/c++/v1/stdexcept	['client_fuzzer', 'server_fuzzer']	[]
/src/cpp-httplib/test/fuzzing/../../httplib.h	['url_parser_fuzzer', 'header_parser_fuzzer', 'multipart_parser_fuzzer', 'client_fuzzer', 'server_fuzzer']	[]

Directories in report

Directory
/usr/local/bin/../include/c++/v1/
/src/cpp-httplib/test/fuzzing/../../
/usr/local/bin/../include/c++/v1/__exception/
/src/cpp-httplib/test/fuzzing/