High level conclusions

Fuzzers reach 64.97% code coverage.

Fuzzers reach 64.04% of cyclomatic complexity.

Fuzzers reach 49.15% of all functions.

Reachability and coverage overview

Functions statically reachable by fuzzers

261 / 531

Cyclomatic complexity statically reachable by fuzzers

2960 / 4622

Runtime code coverage of functions

345 / 531

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: 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	3.57%
gold	[1:9]	4	14.2%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	1	3.57%
lawngreen	50+	22	78.5%
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	23	httplib::detail::parse_http_date(std::__1::basic_string , std::__1::allocator > const&)	call site: 00023	timegm

Runtime coverage analysis

Covered functions

32

Functions that are reachable but not covered

3

Reachable functions

32

Percentage of reachable functions covered

90.62%

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/header_parser_fuzzer.cc	1
/src/cpp-httplib/test/fuzzing/../../httplib.h	14

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	0	0.0%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	2	8.33%
lawngreen	50+	22	91.6%
All colors	24	100

Runtime coverage analysis

Covered functions

19

Functions that are reachable but not covered

5

Reachable functions

32

Percentage of reachable functions covered

84.38%

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/url_parser_fuzzer.cc	1
/src/cpp-httplib/test/fuzzing/../../httplib.h	13

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	118	42.7%
gold	[1:9]	13	4.71%
yellow	[10:29]	5	1.81%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	140	50.7%
All colors	276	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
19	80	httplib::ClientImpl::write_request(httplib::Stream&, httplib::Request&, bool, httplib::Error&, bool)	call site: 00080	inet_pton
17	234	httplib::detail::ChunkedDecoder::read_payload(char*, unsigned long, unsigned long&, unsigned long&)	call site: 00234	__cxa_thread_atexit
11	134	httplib::ClientImpl::write_request_body(httplib::Stream&, httplib::Request&, httplib::Error&)	call site: 00134	_ZN7httplib6detail11make_uniqueINS0_15gzip_compressorEJEEENSt3__19enable_ifIXntsr3std8is_arrayIT_EE5valueENS3_10unique_ptrIS5_NS3_14default_deleteIS5_EEEEE4typeEDpOT0_
7	115	httplib::ClientImpl::write_request(httplib::Stream&, httplib::Request&, bool, httplib::Error&, bool)	call site: 00115	__cxa_thread_atexit
6	153	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: 00153
5	50	httplib::detail::get_header_value(std::__1::unordered_multimap , std::__1::allocator >, std::__1::basic_string , std::__1::allocator >, httplib::detail::case_ignore::hash, httplib::detail::case_ignore::equal_to, std::__1::allocator , std::__1::allocator > const, std::__1::basic_string , std::__1::allocator > > > > const&, std::__1::basic_string , std::__1::allocator > const&, char const*, unsigned long)	call site: 00050	__cxa_allocate_exception
5	74	httplib::ClientImpl::write_request(httplib::Stream&, httplib::Request&, bool, httplib::Error&, bool)	call site: 00074
5	107	httplib::detail::split(char const*, char const*, char, std::__1::function )	call site: 00107
5	192	httplib::ClientImpl::process_request(httplib::Stream&, httplib::Request&, httplib::Response&, bool, httplib::Error&)	call site: 00192
5	260	httplib::detail::read_body_content(httplib::Stream*, httplib::detail::BodyReader&, char*, unsigned long)	call site: 00260
4	15	httplib::ClientImpl::close_socket(httplib::ClientImpl::Socket&)	call site: 00015	close
4	69	httplib::ClientImpl::prepare_default_headers(httplib::Request&, bool, std::__1::basic_string , std::__1::allocator > const&)	call site: 00069

Runtime coverage analysis

Covered functions

108

Functions that are reachable but not covered

91

Reachable functions

277

Percentage of reachable functions covered

67.15%

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.

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	128
/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	172	34.3%
gold	[1:9]	29	5.78%
yellow	[10:29]	8	1.59%
greenyellow	[30:49]	1	0.19%
lawngreen	50+	291	58.0%
All colors	501	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
31	284	httplib::Server::routing(httplib::Request&, httplib::Response&, httplib::Stream&)	call site: 00284	__assert_fail
26	256	httplib::detail::is_websocket_upgrade(httplib::Request const&)	call site: 00256	__cxa_guard_acquire
25	317	httplib::detail::split_find(char const*, char const*, char, unsigned long, std::__1::function )	call site: 00317	timegm
14	183	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: 00183	_ZN7httplib6detail11make_uniqueINS0_12nocompressorEJEEENSt3__19enable_ifIXntsr3std8is_arrayIT_EE5valueENS3_10unique_ptrIS5_NS3_14default_deleteIS5_EEEEE4typeEDpOT0_
13	152	httplib::Server::write_response_core(httplib::Stream&, bool, httplib::Request const&, httplib::Response&, bool)	call site: 00152
12	472	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: 00472	__cxa_end_catch
7	380	httplib::detail::is_connection_persistent(httplib::Request const&)	call site: 00380	poll
5	56	httplib::detail::is_prohibited_header_name(std::__1::basic_string , std::__1::allocator > const&)	call site: 00056	__cxa_allocate_exception
5	95	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: 00095
4	74	httplib::detail::get_range_offset_and_length(std::__1::pair , unsigned long)	call site: 00074
4	467	httplib::Server::routing(httplib::Request&, httplib::Response&, httplib::Stream&)	call site: 00467	__cxa_begin_catch
3	232	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: 00232

Runtime coverage analysis

Covered functions

191

Functions that are reachable but not covered

173

Reachable functions

455

Percentage of reachable functions covered

61.98%

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	208
/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
httplib::Server::read_content_core(httplib::Stream&,httplib::Request&,httplib::Response&,std::__1::function ,std::__1::function ,std::__1::function )const::{lambda(charconst*,unsignedlong,unsignedlong,unsignedlong)#1}::operator()(charconst*,unsignedlong,unsignedlong,unsignedlong)const	/src/cpp-httplib/test/fuzzing/../../httplib.h	5	['N/A', 'N/A', 'size_t', 'size_t', 'size_t']	6	0	31	3	2	75	0	332	190
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	74	0	178	116
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::Server::process_and_close_socket(int)	/src/cpp-httplib/test/fuzzing/../../httplib.h	2	['N/A', 'int']	19	0	106	10	8	479	0	2373	68
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(std::__1::unordered_multimap ,std::__1::allocator >,std::__1::basic_string ,std::__1::allocator >,httplib::detail::case_ignore::hash,std::__1::unordered_multimap::equal_to,std::__1::allocator ,std::__1::allocator >const,std::__1::basic_string ,std::__1::allocator >>>>const&)#1}::operator()(std::__1::unordered_multimap ,std::__1::allocator >,std::__1::basic_string ,std::__1::allocator >,httplib::detail::case_ignore::hash,std::__1::unordered_multimap::equal_to,std::__1::allocator ,std::__1::allocator >const,std::__1::basic_string ,std::__1::allocator >>>>const)const	/src/cpp-httplib/test/fuzzing/../../httplib.h	2	['N/A', 'N/A']	2	0	20	3	2	10	0	69	61
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::compressor::unordered_multimap ,httplib::detail::compressor::allocator >,httplib::detail::compressor::allocator ,httplib::detail::case_ignore::hash,httplib::detail::compressor::basic_string ,httplib::detail::compressor::allocator >::equal_to,httplib::detail::compressor::char_traits const,httplib::detail::compressor::allocator >>>const&)#1}::operator()(httplib::detail::compressor::unordered_multimap ,httplib::detail::compressor::allocator >,httplib::detail::compressor::allocator ,httplib::detail::case_ignore::hash,httplib::detail::compressor::basic_string ,httplib::detail::compressor::allocator >::equal_to,httplib::detail::compressor::char_traits const,httplib::detail::compressor::allocator >>>const)const	/src/cpp-httplib/test/fuzzing/../../httplib.h	2	['N/A', 'N/A']	2	0	20	3	2	10	0	69	59
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

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

Functions statically reachable by fuzzers

349 / 531

Cyclomatic complexity statically reachable by fuzzers

3788 / 4622

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/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_http_date(std::__1::basic_string, std::__1::allocator > const&)']

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

Dictionary

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

/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::detail::ChunkedDecoder::read_payload(char*, unsigned long, unsigned long&, unsigned long&)', 'httplib::ClientImpl::write_request_body(httplib::Stream&, httplib::Request&, httplib::Error&)', 'httplib::ClientImpl::write_request(httplib::Stream&, httplib::Request&, bool, httplib::Error&, bool)', '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::detail::get_header_value(std::__1::unordered_multimap, std::__1::allocator >, std::__1::basic_string, std::__1::allocator >, httplib::detail::case_ignore::hash, httplib::detail::case_ignore::equal_to, std::__1::allocator, std::__1::allocator > const, std::__1::basic_string, std::__1::allocator > > > > const&, std::__1::basic_string, std::__1::allocator > const&, char const*, unsigned long)', 'httplib::ClientImpl::write_request(httplib::Stream&, httplib::Request&, bool, httplib::Error&, bool)', 'httplib::detail::split(char const*, char const*, char, std::__1::function)', 'httplib::ClientImpl::process_request(httplib::Stream&, httplib::Request&, httplib::Response&, bool, httplib::Error&)', 'httplib::detail::read_body_content(httplib::Stream*, httplib::detail::BodyReader&, char*, unsigned long)']

/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::Server::routing(httplib::Request&, httplib::Response&, httplib::Stream&)', 'httplib::detail::is_websocket_upgrade(httplib::Request const&)', 'httplib::detail::split_find(char const*, char const*, char, unsigned long, std::__1::function)', '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::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::detail::is_connection_persistent(httplib::Request const&)', 'httplib::detail::is_prohibited_header_name(std::__1::basic_string, std::__1::allocator > const&)', '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})', 'httplib::detail::get_range_offset_and_length(std::__1::pair, unsigned long)']

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)	90	42	46.66%	['client_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%	['server_fuzzer', 'client_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*)	224	121	54.01%	['server_fuzzer']
httplib::status_message(int)	74	13	17.56%	['server_fuzzer']
httplib::Server::handle_file_request(httplib::Request&,httplib::Response&)	59	4	6.779%	['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/../../httplib.h	['header_parser_fuzzer', 'url_parser_fuzzer', 'client_fuzzer', 'server_fuzzer']	[]
/usr/local/bin/../include/c++/v1/stdexcept	['client_fuzzer', 'server_fuzzer']	[]
/src/cpp-httplib/test/fuzzing/header_parser_fuzzer.cc	['header_parser_fuzzer']	['header_parser_fuzzer']
/src/cpp-httplib/test/fuzzing/server_fuzzer.cc	['server_fuzzer']	['server_fuzzer']
/src/cpp-httplib/test/fuzzing/url_parser_fuzzer.cc	['url_parser_fuzzer']	['url_parser_fuzzer']
/src/cpp-httplib/test/fuzzing/client_fuzzer.cc	['client_fuzzer']	['client_fuzzer']
/usr/local/bin/../include/c++/v1/string	[]	[]
/usr/local/bin/../include/c++/v1/__exception/exception.h	[]	[]
/usr/local/bin/../include/c++/v1/istream	[]	[]

Directories in report

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