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

Table of contents

Project overview: tdengine
High level conclusions
Reachability and coverage overview
Fuzzers overview
Project functions overview
Fuzzer details
Fuzzer: sql-fuzzer
Call tree
Fuzz blockers
Runtime coverage analysis
Files reached
Analyses and suggestions
Optimal target analysis
Remaining optimal interesting functions
All functions overview
Runtime coverage analysis
Complex functions with low coverage
Files and Directories in report
Files in report
Directories in report

Project overview: tdengine

High level conclusions

Reachability and coverage overview

Functions statically reachable by fuzzers
14.66%
241/1644
Cyclomatic complexity statically reachable by fuzzers
8.68%
1717/19783
Functions covered at runtime
93

Fuzzers overview

Fuzzer Fuzzer filename Functions Reached Functions unreached Fuzzer depth Files reached Basic blocks reached Cyclomatic complexity Details
sql-fuzzer tests/fuzz/sql-fuzzer.c 241 1403 24 32 4751 1717 sql-fuzzer.c

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: sql-fuzzer

Call tree

The following is the call tree with color coding for which functions are hit/not hit. This info is based on the coverage achieved of all fuzzers together and not just this specific fuzzer. We use the following coloring scheme where min/max is an interval [min:max) (max non-inclusive) to color the callsite based on how many times the callsite is covered at run time.
Min Max Color
0 1 red
1 10 gold
10 30 yellow
30 50 greenyellow
50 1000000000000 lawngreen

For further technical details on the call tree overview, please see the Glossary .

The distribution of callsites in terms of coloring is
Color Callsite count Percentage
red 552 64.1%
gold 39 4.53%
yellow 2 0.23%
greenyellow 4 0.46%
lawngreen 263 30.5%
All colors 860 100

Full call tree

The following link provides a visualisation of the full call tree overlaid with coverage information: full call tree

For further technical details on how the call tree is generated, please see the Glossary .

Fuzz blockers

The followings nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked Calltree index Parent function Callsite Largest blocked function
273 193 doInitKeywordsTable call site taosPrintGlobalCfg
57 761 yy_reduce call site tVariantListAppendToken
35 649 yy_reduce call site tSqlExprCreateTimestamp
20 144 yy_reduce call site tVariantCreate
19 724 yy_reduce call site tSqlExprClone
18 106 yy_reduce call site setDCLSqlElems
15 548 yy_reduce call site strtol
11 589 yy_reduce call site tSetCreateTableInfo
9 126 yy_reduce call site setDCLSqlElems
7 68 destroyRelationInfo call site freeCreateTableInfo
7 136 setCreateDbInfo call site setDCLSqlElems
6 82 yy_reduce call site setShowOptions

Branch Blockers [Click to view]

Runtime coverage analysis

Covered functions
93
Functions that are reachable but not covered
168
Reachable functions
241
Percentage of reachable functions covered
30.29%
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
tests/fuzz/sql-fuzzer.c 1
src/query/src/qSqlParser.c 50
src/query/src/sql.c 16
src/util/src/tarray.c 9
src/common/src/tvariant.c 4
src/common/src/ttypes.c 2
src/util/src/ttokenizer.c 3
src/util/src/hash.c 8
src/util/src/tlog.c 9
src/os/src/detail/osSemaphore.c 1
src/os/src/detail/osFile.c 3
src/util/src/tnote.c 7
src/util/src/tconfig.c 1
src/os/src/detail/osSysinfo.c 1
src/common/src/tglobal.c 1
src/os/src/detail/osTime.c 4
src/os/src/detail/osDir.c 2
deps/zlib-1.2.11/src/gzlib.c 4
deps/zlib-1.2.11/src/gzwrite.c 6
deps/zlib-1.2.11/src/deflate.c 15
deps/zlib-1.2.11/src/zutil.c 2
deps/zlib-1.2.11/src/crc32.c 4
deps/zlib-1.2.11/src/adler32.c 2
deps/zlib-1.2.11/src/trees.c 20
deps/zlib-1.2.11/src/gzclose.c 1
deps/zlib-1.2.11/src/gzread.c 1
deps/zlib-1.2.11/src/inflate.c 2
src/util/src/thashutil.c 1
src/util/src/tlockfree.c 4
src/util/src/tutil.c 3
src/util/src/terror.c 1
src/util/src/tcompare.c 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
tsCompressFloat /src/tdengine/src/util/inc/tscompression.h 8 ['char *', 'int ', 'int ', 'char *', 'int ', 'char ', 'char *', 'int '] 25 0 90 10 4 303 0 2180 2174
tsDecompressFloat /src/tdengine/src/util/inc/tscompression.h 8 ['char *', 'int ', 'int ', 'char *', 'int ', 'char ', 'char *', 'int '] 19 0 101 12 5 275 0 2154 1055
LZ4_compress_fast_extState_fastReset /src/tdengine/deps/lz4/src/lz4.c 6 ['char *', 'char *', 'char *', 'int ', 'int ', 'int '] 1 0 25976 2854 889 4 0 898 889
LZ4_compress_limitedOutput_continue /src/tdengine/deps/lz4/src/lz4.c 5 ['union.LZ4_stream_u *', 'char *', 'char *', 'int ', 'int '] 2 0 32 3 2 5 0 871 864
tVariantDump /src/tdengine/src/common/src/tvariant.c 4 ['struct.tVariant *', 'char *', 'N/A', 'N/A'] 20 0 30 3 2 161 0 1894 795
LZ4_decompress_safe_continue /src/tdengine/deps/lz4/src/lz4.c 5 ['union.LZ4_streamDecode_u *', 'char *', 'char *', 'int ', 'int '] 3 0 3019 395 143 8 0 696 551
ZSTD_compressBlock_btultra_extDict /src/tdengine/deps/TSZ/zstd/compress/zstd_opt.c 6 ['struct.ZSTD_matchState_t *', 'struct.seqStore_t *', 'int *', 'struct.ZSTD_compressionParameters *', 'char *', 'size_t '] 5 0 13498 1444 509 36 0 651 541
ZSTD_compressBlock_btopt_extDict /src/tdengine/deps/TSZ/zstd/compress/zstd_opt.c 6 ['struct.ZSTD_matchState_t *', 'struct.seqStore_t *', 'int *', 'struct.ZSTD_compressionParameters *', 'char *', 'size_t '] 5 0 13498 1444 509 36 0 651 509
ZSTD_compressBlock_btultra_dictMatchState /src/tdengine/deps/TSZ/zstd/compress/zstd_opt.c 6 ['struct.ZSTD_matchState_t *', 'struct.seqStore_t *', 'int *', 'struct.ZSTD_compressionParameters *', 'char *', 'size_t '] 5 0 13498 1444 509 36 0 651 509
ZSTD_compressBlock_btopt_dictMatchState /src/tdengine/deps/TSZ/zstd/compress/zstd_opt.c 6 ['struct.ZSTD_matchState_t *', 'struct.seqStore_t *', 'int *', 'struct.ZSTD_compressionParameters *', 'char *', 'size_t '] 5 0 13498 1444 509 36 0 651 509

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

Functions statically reachable by fuzzers
42.03%
691/1644
Cyclomatic complexity statically reachable by fuzzers
51.12%
10113 / 19783

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

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
tStrToInteger 45 22 48.88% ['sql-fuzzer']
tSetCreateTableInfo 31 13 41.93% ['sql-fuzzer']
Parse 162 56 34.56% ['sql-fuzzer']
yy_find_shift_action 60 30 50.0% ['sql-fuzzer']
yy_reduce 1298 512 39.44% ['sql-fuzzer']
yy_shift 33 18 54.54% ['sql-fuzzer']
taosHashInit 58 23 39.65% ['sql-fuzzer']
taosHashGetClone 47 25 53.19% ['sql-fuzzer']

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/tdengine/deps/zlib-1.2.11/src/gzwrite.c ['sql-fuzzer'] []
/src/tdengine/deps/lz4/src/lz4.c [] []
/src/tdengine/src/os/src/detail/osTimer.c [] []
/src/tdengine/deps/TSZ/sz/src/Huffman.c [] []
/src/tdengine/deps/TSZ/zstd/compress/zstd_double_fast.c [] []
/src/tdengine/src/common/src/tglobal.c ['sql-fuzzer'] []
/src/tdengine/src/query/src/sql.c ['sql-fuzzer'] ['sql-fuzzer']
/src/tdengine/deps/TSZ/zstd/compress/zstd_compress.c [] []
/src/tdengine/src/util/src/ttimer.c [] []
/src/tdengine/deps/zlib-1.2.11/src/inftrees.c [] []
/src/tdengine/src/os/src/detail/osFile.c ['sql-fuzzer'] []
/src/tdengine/deps/TSZ/sz/src/dataCompression.c [] []
/src/tdengine/src/util/src/ttokenizer.c ['sql-fuzzer'] ['sql-fuzzer']
/src/tdengine/deps/TSZ/sz/src/sz_float.c [] []
/src/tdengine/deps/TSZ/sz/src/DynamicByteArray.c [] []
/src/tdengine/deps/zlib-1.2.11/src/crc32.c ['sql-fuzzer'] []
/src/tdengine/deps/TSZ/zstd/common/error_private.c [] []
/src/tdengine/src/util/src/terror.c ['sql-fuzzer'] ['sql-fuzzer']
/src/tdengine/src/util/src/talgo.c [] []
/src/tdengine/src/util/src/thashutil.c ['sql-fuzzer'] ['sql-fuzzer']
/src/tdengine/src/util/src/tsched.c [] []
/src/tdengine/src/os/src/detail/osSysinfo.c ['sql-fuzzer'] []
/src/tdengine/deps/TSZ/sz/src/td_sz.c [] []
/src/tdengine/deps/zlib-1.2.11/src/zutil.c ['sql-fuzzer'] []
/src/tdengine/src/common/src/tlocale.c [] []
/src/tdengine/deps/TSZ/sz/src/conf.c [] []
/src/tdengine/src/util/src/tnote.c ['sql-fuzzer'] []
/src/tdengine/src/os/src/detail/osRand.c [] []
/src/tdengine/deps/zlib-1.2.11/src/inflate.c ['sql-fuzzer'] []
/src/tdengine/src/os/src/detail/osDir.c ['sql-fuzzer'] []
/src/tdengine/src/util/src/tutil.c ['sql-fuzzer'] ['sql-fuzzer']
/src/tdengine/deps/TSZ/sz/src/sz.c [] []
/src/tdengine/deps/TSZ/zstd/decompress/huf_decompress.c [] []
/src/tdengine/src/os/src/detail/osString.c [] []
/src/tdengine/deps/TSZ/sz/src/szd_float.c [] []
/src/tdengine/src/os/src/detail/osSemaphore.c ['sql-fuzzer'] []
/src/tdengine/deps/rmonotonic/src/monotonic.c [] []
/src/tdengine/src/common/src/ttypes.c ['sql-fuzzer'] ['sql-fuzzer']
/src/tdengine/deps/TSZ/sz/src/dictionary.c [] []
/src/tdengine/deps/TSZ/zstd/compress/fse_compress.c [] []
/src/tdengine/deps/TSZ/sz/src/szd_double.c [] []
/src/tdengine/deps/zlib-1.2.11/src/adler32.c ['sql-fuzzer'] []
/src/tdengine/src/os/src/detail/osSleep.c [] []
/src/tdengine/src/util/src/tconfig.c ['sql-fuzzer'] []
/src/tdengine/deps/zlib-1.2.11/src/gzread.c ['sql-fuzzer'] []
/src/tdengine/deps/TSZ/zstd/compress/zstd_compress_internal.h [] []
/src/tdengine/src/util/src/tlog.c ['sql-fuzzer'] []
/src/tdengine/deps/TSZ/sz/src/DynamicIntArray.c [] []
/src/tdengine/src/util/src/tarray.c ['sql-fuzzer'] ['sql-fuzzer']
/src/tdengine/src/util/src/tlockfree.c ['sql-fuzzer'] []
/src/tdengine/deps/TSZ/zstd/common/zstd_internal.h [] []
/src/tdengine/src/util/src/tcompression.c [] []
/src/tdengine/deps/TSZ/zstd/common/mem.h [] []
/src/tdengine/src/util/src/hash.c ['sql-fuzzer'] ['sql-fuzzer']
/src/tdengine/deps/TSZ/zstd/common/bitstream.h [] []
/src/tdengine/src/common/src/tvariant.c ['sql-fuzzer'] ['sql-fuzzer']
/src/tdengine/deps/TSZ/zstd/compress/zstd_lazy.c [] []
/src/tdengine/deps/TSZ/sz/src/CompressElement.c [] []
/src/tdengine/deps/zlib-1.2.11/src/deflate.c ['sql-fuzzer'] []
/src/tdengine/deps/zlib-1.2.11/src/gzclose.c ['sql-fuzzer'] []
/src/tdengine/deps/zlib-1.2.11/src/gzlib.c ['sql-fuzzer'] []
/src/tdengine/deps/TSZ/zstd/compress/huf_compress.c [] []
/src/tdengine/deps/TSZ/zstd/common/cpu.h [] []
/src/tdengine/src/util/src/tsocket.c [] []
/src/tdengine/deps/TSZ/sz/src/TightDataPointStorageD.c [] []
/src/tdengine/deps/TSZ/zstd/common/entropy_common.c [] []
/src/tdengine/deps/TSZ/zstd/common/fse_decompress.c [] []
/src/tdengine/tests/fuzz/sql-fuzzer.c ['sql-fuzzer'] ['sql-fuzzer']
/src/tdengine/deps/TSZ/zstd/compress/zstd_fast.c [] []
/src/tdengine/deps/TSZ/sz/src/TypeManager.c [] []
/src/tdengine/src/util/inc/tscompression.h [] []
/src/tdengine/deps/TSZ/sz/src/ByteToolkit.c [] []
/src/tdengine/deps/TSZ/zstd/compress/zstd_opt.c [] []
/src/tdengine/deps/TSZ/zstd/common/zstd_common.c [] []
/src/tdengine/src/os/src/linux/linuxEnv.c [] []
/src/tdengine/deps/TSZ/zstd/compress/hist.c [] []
/src/tdengine/src/util/src/tcompare.c ['sql-fuzzer'] ['sql-fuzzer']
/src/tdengine/deps/TSZ/sz/src/iniparser.c [] []
/src/tdengine/deps/TSZ/zstd/common/fse.h [] []
/src/tdengine/deps/TSZ/zstd/compress/zstd_ldm.c [] []
/src/tdengine/deps/zlib-1.2.11/src/trees.c ['sql-fuzzer'] []
/src/tdengine/src/util/src/tmd5.c [] []
/src/tdengine/deps/TSZ/sz/src/sz_double.c [] []
/src/tdengine/deps/TSZ/zstd/common/error_private.h [] []
/src/tdengine/deps/TSZ/zstd/decompress/zstd_decompress.c [] []
/src/tdengine/src/os/src/detail/osSocket.c [] []
/src/tdengine/src/os/src/detail/osTime.c ['sql-fuzzer'] ['sql-fuzzer']
/src/tdengine/deps/TSZ/zstd/common/xxhash.c [] []
/src/tdengine/deps/zlib-1.2.11/src/inffast.c [] []
/src/tdengine/src/common/src/ttimezone.c [] []
/src/tdengine/src/query/src/qSqlParser.c ['sql-fuzzer'] ['sql-fuzzer']
/src/tdengine/src/util/src/version.c [] []
/src/tdengine/deps/TSZ/sz/src/TightDataPointStorageF.c [] []
/src/tdengine/deps/TSZ/sz/src/utility.c [] []

Directories in report

Directory
/src/tdengine/deps/lz4/src/
/src/tdengine/src/os/src/detail/
/src/tdengine/src/util/src/
/src/tdengine/deps/TSZ/sz/src/
/src/tdengine/deps/zlib-1.2.11/src/
/src/tdengine/src/common/src/
/src/tdengine/deps/TSZ/zstd/decompress/
/src/tdengine/src/util/inc/
/src/tdengine/deps/TSZ/zstd/compress/
/src/tdengine/src/query/src/
/src/tdengine/deps/TSZ/zstd/common/
/src/tdengine/src/os/src/linux/
/src/tdengine/deps/rmonotonic/src/
/src/tdengine/tests/fuzz/