High level conclusions

Fuzzer fuzz_decomp_corrupt_block is blocked:

The runtime code coverage of fuzz_decomp_corrupt_block covers 28.57% of its statically reachable code. This means there is some place that blocks the fuzzer to continue exploring more code at run time.

Fuzzer fuzz_roundtrip is blocked:

The runtime code coverage of fuzz_roundtrip covers 0.0% of its statically reachable code. This means there is some place that blocks the fuzzer to continue exploring more code at run time.

Fuzzers reach 21.26% of cyclomatic complexity.

Fuzzers reach 4.417% of all functions.

Reachability and coverage overview

Functions statically reachable by fuzzers

11 / 249

Cyclomatic complexity statically reachable by fuzzers

74 / 348

Runtime code coverage of functions

95 / 249

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: fuzz_roundtrip

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	27	100.%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	0	0.0%
All colors	27	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
26	0	EP	call site: 00000	short_copy

Runtime coverage analysis

Covered functions

2

Functions that are reachable but not covered

4

Reachable functions

4

Percentage of reachable functions covered

0.0%

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
fuzz/fuzz_targets/fuzz_roundtrip.rs	4
src/block/compress.rs	1
src/block/decompress.rs	2
src/block/mod.rs	6
fuzz/fuzz_targets/fuzz_decomp_corrupt_block.rs	3
lz4_bin/src/main.rs	5
src/fastcpy.rs	5

Fuzzer: fuzz_decomp_corrupt_block

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	24	63.1%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	14	36.8%
All colors	38	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
12	25	lz4_flex::block::decompress_size_prepended	call site: 00025	short_copy
6	7	super::uncompressed_size	call site: 00007
5	0	EP	call site: 00000
1	15	lz4_flex::block::decompress_size_prepended_with_dict	call site: 00015

Runtime coverage analysis

Covered functions

36

Functions that are reachable but not covered

5

Reachable functions

7

Percentage of reachable functions covered

28.57%

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
fuzz/fuzz_targets/fuzz_decomp_corrupt_block.rs	7
src/block/decompress.rs	6
src/block/mod.rs	6
lz4_bin/src/main.rs	5
src/fastcpy.rs	5

Fuzzer: fuzz_decomp_corrupt_frame

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	53	24.4%
gold	[1:9]	2	0.92%
yellow	[10:29]	15	6.91%
greenyellow	[30:49]	2	0.92%
lawngreen	50+	145	66.8%
All colors	217	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
17	199	SliceSink::extend_from_slice	call site: 00199	lz4_flex_frame_decompress
7	0	EP	call site: 00000	FrameDecoder::read_to_end
6	160	FrameDecoder::read_block	call site: 00160
5	192	FrameDecoder::read_to_end	call site: 00192
4	181	SliceSink::extend_from_slice_wild	call site: 00181	short_copy
2	38	FrameInfo::read	call site: 00038	TrackWriteSize::write
2	101	FrameDecoder::read_frame_info	call site: 00101
2	137	FrameDecoder::read_block	call site: 00137
1	21	FrameInfo::read	call site: 00021
1	43	FrameInfo::read	call site: 00043
1	46	FrameInfo::read	call site: 00046
1	60	FrameInfo::read_size	call site: 00060

Runtime coverage analysis

Covered functions

69

Functions that are reachable but not covered

6

Reachable functions

11

Percentage of reachable functions covered

45.45%

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
fuzz/fuzz_targets/fuzz_decomp_corrupt_frame.rs	7
lz4_bin/src/main.rs	7
src/frame/decompress.rs	40
src/frame/header.rs	19
src/frame/compress.rs	1
src/block/compress.rs	2
src/block/hashtable.rs	1
src/sink.rs	6
src/fastcpy.rs	5

Fuzzer: fuzz_roundtrip_cpp_compress

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	192	96.0%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	8	4.0%
All colors	200	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
110	0	EP	call site: 00000	FrameDecoder::read_to_end
59	124	SliceSink::capacity	call site: 00124	BlockInfo::read
12	111	SliceSink::extend_with_fill	call site: 00111	FrameDecoder::read_block
7	192	io::Result::extend_from_slice	call site: 00192
4	185	SliceSink::extend_from_slice_wild	call site: 00185	short_copy

Runtime coverage analysis

Covered functions

70

Functions that are reachable but not covered

5

Reachable functions

8

Percentage of reachable functions covered

37.5%

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
fuzz/fuzz_targets/fuzz_roundtrip_cpp_compress.rs	8
lz4_bin/src/main.rs	7
src/frame/decompress.rs	40
src/frame/header.rs	19
src/frame/compress.rs	1
src/block/compress.rs	2
src/block/hashtable.rs	1
src/sink.rs	6
src/fastcpy.rs	5

Fuzzer: fuzz_roundtrip_frame

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	109	49.3%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	112	50.6%
All colors	221	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	24	lz4_flex::frame::FrameEncoder::with_frame_info	call site: 00024	TrackWriteSize::write
7	71	FrameInfo::read	call site: 00071
7	124	FrameInfo::read	call site: 00124
6	201	FrameDecoder::read_block	call site: 00201
5	0	EP	call site: 00000
5	60	FrameInfo::read	call site: 00060
5	113	FrameInfo::read	call site: 00113
4	7	SliceSink::extend_from_slice_wild	call site: 00007	short_copy
4	140	FrameDecoder::read_frame_info	call site: 00140
3	14	SliceSink::extend_from_slice	call site: 00014
3	66	FrameInfo::read	call site: 00066
3	119	FrameInfo::read	call site: 00119

Runtime coverage analysis

Covered functions

130

Functions that are reachable but not covered

44

Reachable functions

75

Percentage of reachable functions covered

41.33%

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
fuzz/fuzz_targets/fuzz_roundtrip_frame.rs	20
src/sink.rs	6
src/fastcpy.rs	5
src/frame/compress.rs	4
lz4_bin/src/main.rs	8
src/frame/header.rs	23
src/frame/decompress.rs	34
src/block/compress.rs	2
src/block/hashtable.rs	1

Fuzzer: fuzz_roundtrip_cpp_decompress

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	193	96.5%
gold	[1:9]	0	0.0%
yellow	[10:29]	0	0.0%
greenyellow	[30:49]	0	0.0%
lawngreen	50+	7	3.50%
All colors	200	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
119	0	EP	call site: 00000	FrameDecoder::read_to_end
59	120	SliceSink::capacity	call site: 00120	BlockInfo::read
11	188	io::Result::extend_from_slice	call site: 00188	FrameDecoder::read_to_end
4	181	SliceSink::extend_from_slice_wild	call site: 00181	short_copy

Runtime coverage analysis

Covered functions

64

Functions that are reachable but not covered

2

Reachable functions

4

Percentage of reachable functions covered

50.0%

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.

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
fuzz/fuzz_targets/fuzz_roundtrip_cpp_decompress.rs	4
lz4_bin/src/main.rs	7
src/frame/decompress.rs	40
src/frame/header.rs	19
src/frame/compress.rs	1
src/block/compress.rs	2
src/block/hashtable.rs	1
src/sink.rs	6
src/fastcpy.rs	5

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

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

Functions statically reachable by fuzzers

11 / 249

Cyclomatic complexity statically reachable by fuzzers

74 / 348

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.

fuzz/fuzz_targets/fuzz_roundtrip.rs

Dictionary

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

fuzz/fuzz_targets/fuzz_decomp_corrupt_block.rs

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=['lz4_flex::block::decompress_size_prepended', 'super::uncompressed_size', 'lz4_flex::block::decompress_size_prepended_with_dict']

fuzz/fuzz_targets/fuzz_decomp_corrupt_frame.rs

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=['SliceSink::extend_from_slice', 'FrameDecoder::read_block', 'fuzz_target', 'SliceSink::extend_from_slice_wild', 'FrameInfo::read', 'FrameDecoder::read_frame_info']

fuzz/fuzz_targets/fuzz_roundtrip_cpp_compress.rs

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=['SliceSink::capacity', 'SliceSink::extend_with_fill', 'io::Result::extend_from_slice', 'SliceSink::extend_from_slice_wild']

fuzz/fuzz_targets/fuzz_roundtrip_frame.rs

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=['lz4_flex::frame::FrameEncoder::with_frame_info', 'FrameInfo::read', 'FrameDecoder::read_block', 'SliceSink::extend_from_slice_wild', 'FrameDecoder::read_frame_info', 'SliceSink::extend_from_slice']

fuzz/fuzz_targets/fuzz_roundtrip_cpp_decompress.rs

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=['SliceSink::capacity', 'io::Result::extend_from_slice', 'SliceSink::extend_from_slice_wild']

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
twox_hash::xxhash32::Buffer::extend	32	13	40.62%

New fuzzers

The below fuzzers are templates and suggestions for how to target the set of optimal functions above

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/lz4_flex/fuzz/fuzz_targets/fuzz_decomp_corrupt_frame.rs	['fuzz_decomp_corrupt_frame']	[]
/src/lz4_flex/lz4_bin/src/main.rs	['fuzz_roundtrip', 'fuzz_decomp_corrupt_block', 'fuzz_decomp_corrupt_frame', 'fuzz_roundtrip_cpp_compress', 'fuzz_roundtrip_frame', 'fuzz_roundtrip_cpp_decompress']	['fuzz_decomp_corrupt_block', 'fuzz_decomp_corrupt_frame', 'fuzz_roundtrip_cpp_compress', 'fuzz_roundtrip_frame', 'fuzz_roundtrip_cpp_decompress']
/src/lz4_flex/src/block/compress.rs	['fuzz_roundtrip', 'fuzz_decomp_corrupt_frame', 'fuzz_roundtrip_cpp_compress', 'fuzz_roundtrip_frame', 'fuzz_roundtrip_cpp_decompress']	['fuzz_roundtrip_frame', 'fuzz_roundtrip_cpp_decompress']
/src/lz4_flex/src/frame/header.rs	['fuzz_decomp_corrupt_frame', 'fuzz_roundtrip_cpp_compress', 'fuzz_roundtrip_frame', 'fuzz_roundtrip_cpp_decompress']	['fuzz_decomp_corrupt_frame', 'fuzz_roundtrip_cpp_compress', 'fuzz_roundtrip_frame', 'fuzz_roundtrip_cpp_decompress']
/src/lz4_flex/src/fastcpy_unsafe.rs	[]	[]
/src/lz4_flex/src/block/decompress_safe.rs	[]	[]
/src/lz4_flex/src/frame/compress.rs	['fuzz_decomp_corrupt_frame', 'fuzz_roundtrip_cpp_compress', 'fuzz_roundtrip_frame', 'fuzz_roundtrip_cpp_decompress']	['fuzz_decomp_corrupt_frame', 'fuzz_roundtrip_cpp_compress', 'fuzz_roundtrip_frame', 'fuzz_roundtrip_cpp_decompress']
/src/lz4_flex/miri_tests/src/main.rs	[]	[]
/src/lz4_flex/fuzz/fuzz_targets/fuzz_roundtrip_cpp_compress.rs	['fuzz_roundtrip_cpp_compress']	[]
/src/lz4_flex/benchmarks/src/main.rs	[]	[]
/src/lz4_flex/src/frame/decompress.rs	['fuzz_decomp_corrupt_frame', 'fuzz_roundtrip_cpp_compress', 'fuzz_roundtrip_frame', 'fuzz_roundtrip_cpp_decompress']	['fuzz_decomp_corrupt_frame', 'fuzz_roundtrip_cpp_compress', 'fuzz_roundtrip_frame', 'fuzz_roundtrip_cpp_decompress']
/src/lz4_flex/benches/binggan_bench.rs	[]	[]
/src/lz4_flex/src/fastcpy.rs	['fuzz_roundtrip', 'fuzz_decomp_corrupt_block', 'fuzz_decomp_corrupt_frame', 'fuzz_roundtrip_cpp_compress', 'fuzz_roundtrip_frame', 'fuzz_roundtrip_cpp_decompress']	[]
/src/lz4_flex/fuzz/fuzz_targets/fuzz_decomp_corrupt_block.rs	['fuzz_roundtrip', 'fuzz_decomp_corrupt_block']	[]
/src/lz4_flex/src/block/mod.rs	['fuzz_roundtrip', 'fuzz_decomp_corrupt_block']	['fuzz_decomp_corrupt_block']
/src/lz4_flex/src/frame/mod.rs	[]	[]
/src/lz4_flex/src/block/decompress.rs	['fuzz_roundtrip', 'fuzz_decomp_corrupt_block']	[]
/src/lz4_flex/fuzz/fuzz_targets/fuzz_roundtrip_cpp_decompress.rs	['fuzz_roundtrip_cpp_decompress']	[]
/src/lz4_flex/src/sink.rs	['fuzz_decomp_corrupt_frame', 'fuzz_roundtrip_cpp_compress', 'fuzz_roundtrip_frame', 'fuzz_roundtrip_cpp_decompress']	['fuzz_decomp_corrupt_frame', 'fuzz_roundtrip_cpp_compress', 'fuzz_roundtrip_frame', 'fuzz_roundtrip_cpp_decompress']
/src/lz4_flex/tests/tests.rs	[]	[]
/src/lz4_flex/src/block/hashtable.rs	['fuzz_decomp_corrupt_frame', 'fuzz_roundtrip_cpp_compress', 'fuzz_roundtrip_frame', 'fuzz_roundtrip_cpp_decompress']	['fuzz_decomp_corrupt_frame', 'fuzz_roundtrip_cpp_compress', 'fuzz_roundtrip_frame', 'fuzz_roundtrip_cpp_decompress']
/src/lz4_flex/fuzz/fuzz_targets/fuzz_roundtrip.rs	['fuzz_roundtrip']	[]
/src/lz4_flex/fuzz/fuzz_targets/fuzz_roundtrip_frame.rs	['fuzz_roundtrip_frame']	[]

Directories in report

Directory
/src/lz4_flex/src/frame/
/src/lz4_flex/tests/
/src/lz4_flex/miri_tests/src/
/src/lz4_flex/lz4_bin/src/
/src/lz4_flex/benchmarks/src/
/src/lz4_flex/fuzz/fuzz_targets/
/src/lz4_flex/benches/
/src/lz4_flex/src/
/src/lz4_flex/src/block/

This section shows a list of 3rd party function calls and their relative coverage information. By static analysis of the target project code, all of the 3rd party function call and their caller information, including the source file and line number that initiate the call are captured. The caller source code file and line number are shown in column 2 while column 1 is the function name of the 3rd party function call. Each occurrent of the 3rd party function call will occuply a separate row. Column 3 of each row indicate if the 3rd party call in the source file line is unreachable. Column 4 lists all fuzzers that have covered that particular system call in that specific location (source file and line)during their dynamic fuzzing.

Function in each files in report

Target sink	Callsite location	Reached by fuzzer	Covered by Fuzzers