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

Table of contents

Project overview: libass
High level conclusions
Reachability and coverage overview
Fuzzers overview
Project functions overview
Fuzzer details
Fuzzer: libass_fuzzer
Call tree
Fuzz blockers
Runtime coverage analysis
Files reached
Analyses and suggestions
Optimal target analysis
Remaining optimal interesting functions
All functions overview
Fuzz engine guidance
/src/libass/fuzz/fuzz.c
Dictionary
Fuzzer function priority
Runtime coverage analysis
Complex functions with low coverage
Files and Directories in report
Files in report
Directories in report
Metadata section
Report generation date: 2026-05-30

Project overview: libass

High level conclusions

Reachability and coverage overview

Functions statically reachable by fuzzers
44.0%
6307 / 14490
Cyclomatic complexity statically reachable by fuzzers
48.0%
23373 / 48443
Runtime code coverage of functions
53.0%
7686 / 14490

Warning: The number of runtime covered functions are larger than the number of reachable functions. This means that Fuzz Introspector found there are more functions covered at runtime than what is considered reachable based on the static analysis. This is a limitation in the analysis as anything covered at runtime is by definition reachable by the fuzzers.
This is likely due to a limitation in the static analysis. In this case, the count of functions covered at runtime is the true value, which means this is what should be considered "achieved" by the fuzzer.

Use the project functions table below to query all functions that were not covered at runtime.

Fuzzers overview

Fuzzer Fuzzer filename Functions Reached Functions unreached Fuzzer depth Files reached Basic blocks reached Cyclomatic complexity Details
libass_fuzzer /src/libass/fuzz/fuzz.c 11486 8245 56 196 47091 23535 fuzz.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 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 details

Fuzzer: libass_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

Full calltree

Call tree overview bitmap:

The distribution of callsites in terms of coloring is
Color Runtime hitcount Callsite count Percentage
red 0 7224 60.5%
gold [1:9] 160 1.34%
yellow [10:29] 68 0.56%
greenyellow [30:49] 258 2.16%
lawngreen 50+ 4222 35.3%
All colors 11932 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
154 7847 OT::OffsetTo >, OT::NumType , void, false>::operator()(void const*) const call site: 07847 _ZN2OTplIPKN3AAT16LigatureSubtableINS1_13ExtendedTypesEEETnPN12hb_enable_ifIXsr3std14is_convertibleIKT_PKvEE5valueEvE4typeELPv0EEERKNS_14UnsizedArrayOfINS_7NumTypeILb1EtLj2EEEEERS9_RKNS_8OffsetToISJ_NSH_ILb1EjLj4EEEvLb0EEE
147 7450 void hb_bit_set_t::set_array (bool, unsigned int const*, unsigned int, unsigned int) call site: 07450 _ZNK4$_43clI13hb_map_iter_tI17hb_sorted_array_tIKN12hb_aat_map_t13range_flags_tEEZNK3AAT5ChainINS7_13ExtendedTypesEE5applyEPNS7_22hb_aat_apply_context_tEPKNS7_33hb_aat_layout_chain_accelerator_tEEUlS4_E_L24hb_function_sortedness_t0ELPv0EERK4$_19SM_TnPN12hb_enable_ifIXsr14hb_is_iterableIT_EE5valueEvE4typeELSI_0EEEbOSO_OT0_OT1_
128 4824 hb_blob_t* hb_sanitize_context_t::reference_table (hb_face_t const*, unsigned int) call site: 04824 _ZN21hb_sanitize_context_t8dispatchIN3AAT21RearrangementSubtableINS1_13ExtendedTypesEEEJEEEDTcl9_dispatchfp_cv11hb_priorityILj16EE_Espclsr3stdE7forwardIT0_Efp0_EEERKT_DpOS7_
95 10484 OT::OffsetTo >, OT::NumType , void, false>::operator()(void const*) const call site: 10484 _ZN2OTplIPKN3AAT4ankrETnPN12hb_enable_ifIXsr3std14is_convertibleIKT_PKvEE5valueEvE4typeELPv0EEERKNS1_6LookupINS_8OffsetToINS_7ArrayOfINS1_6AnchorENS_7NumTypeILb1EjLj4EEEEENSI_ILb1EtLj2EEEvLb0EEEEERS7_RKNSF_ISN_SJ_vLb1EEE
93 10307 AAT::ankr::sanitize(hb_sanitize_context_t*) const call site: 10307 _ZN21hb_sanitize_context_t9_dispatchIN3AAT6LookupIN2OT8OffsetToINS3_7ArrayOfINS1_6AnchorENS3_7NumTypeILb1EjLj4EEEEENS7_ILb1EtLj2EEEvLb0EEEEEJPKNS7_ILb1EhLj1EEEEEEDTcldtfp_8sanitizefpTspclsr3stdE7forwardIT0_Efp1_EEERKT_11hb_priorityILj1EEDpOSG_
92 6269 OT::OffsetTo >, OT::NumType , void, false>::operator()(void const*) const call site: 06269 _ZN2OTplIPKN3AAT10StateTableINS1_13ExtendedTypesENS1_12Format1EntryILb1EE9EntryDataEEETnPN12hb_enable_ifIXsr3std14is_convertibleIKT_PKvEE5valueEvE4typeELPv0EEERKNS_14UnsizedArrayOfINS_7NumTypeILb1EtLj2EEEEERSC_RKNS_8OffsetToISM_NSK_ILb1EjLj4EEEvLb0EEE
88 10772 OT::SortedArrayOf > >::as_array() const call site: 10772 _ZN2OTplIPKN3AAT10StateTableINS1_13ObsoleteTypesEvEETnPN12hb_enable_ifIXsr3std14is_convertibleIKT_PKvEE5valueEvE4typeELPv0EEERKNS_14UnsizedArrayOfINS_7NumTypeILb1EsLj2EEEEERS9_RKNS_8OffsetToISJ_NSH_ILb1EtLj2EEEvLb0EEE
87 11582 hb_buffer_t::leave() call site: 11582 hb_shape_full
86 8140 OT::OffsetTo , OT::NumType , void, false>, OT::NumType , void, false>::operator()(void const*) const call site: 08140 _ZN2OTplIPKN3AAT10StateTableINS1_13ObsoleteTypesENS1_18ContextualSubtableIS3_E9EntryDataEEETnPN12hb_enable_ifIXsr3std14is_convertibleIKT_PKvEE5valueEvE4typeELPv0EEERKNS1_10ClassTableINS_7NumTypeILb1EhLj1EEEEERSC_RKNS_8OffsetToISM_NSK_ILb1EtLj2EEEvLb0EEE
83 10618 OT::ArrayOf >::operator[](int) const call site: 10618 _ZN2OTplIPKN3AAT19KerxSubTableFormat6INS1_18KerxSubTableHeaderEEETnPN12hb_enable_ifIXsr3std14is_convertibleIKT_PKvEE5valueEvE4typeELPv0EEERKNS1_6LookupINS_7NumTypeILb1EjLj4EEEEERS9_RKNS_8OffsetToISJ_SI_vLb0EEE
81 6364 hb_bit_page_t::get(unsigned int) const call site: 06364 _ZN2OTplIPKN3AAT10StateTableINS1_13ExtendedTypesENS1_12Format1EntryILb1EE9EntryDataEEETnPN12hb_enable_ifIXsr3std14is_convertibleIKT_PKvEE5valueEvE4typeELPv0EEERKNS1_6LookupINS_7NumTypeILb1EtLj2EEEEERSC_RKNS_8OffsetToISM_NSK_ILb1EjLj4EEEvLb0EEE
80 3741 OT::Layout::GPOS_impl::ValueFormat::get_len() const call site: 03741 _ZN21hb_sanitize_context_t8dispatchIN2OT6Layout9GPOS_impl16SinglePosFormat2EJEEEDTcl9_dispatchfp_cv11hb_priorityILj16EE_Espclsr3stdE7forwardIT0_Efp0_EEERKT_DpOS7_

Runtime coverage analysis

Covered functions
3249
Functions that are reachable but not covered
5107
Reachable functions
11486
Percentage of reachable functions covered
55.54%
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/libass/fuzz/fuzz.c 6
/src/libass/libass/ass_library.c 7
/src/libass/libass/ass_render.c 67
/src/libass/libass/ass_utils.c 10
/src/libass/libass/ass_bitmap_engine.c 1
/src/libass/libass/ass_cache.c 16
/src/libass/libass/ass_shaper.c 43
/work/build/../../src/harfbuzz/src/hb-font.cc 38
/work/build/../../src/harfbuzz/src/hb-object.hh 107
/work/build/../../src/harfbuzz/src/hb-common.cc 18
/work/build/../../src/harfbuzz/src/failing-alloc.c 5
/work/build/../../src/harfbuzz/src/hb-font.hh 54
/work/build/../../src/harfbuzz/src/hb-atomic.hh 173
/work/build/../../src/harfbuzz/src/hb-debug.hh 5
/work/build/../../src/harfbuzz/src/hb-algs.hh 304
/src/libass/libass/ass_font.c 14
/work/build/../../src/harfbuzz/src/hb-buffer.cc 44
/work/build/../../src/harfbuzz/src/hb-buffer.hh 53
/work/build/../../src/harfbuzz/src/hb-set-digest.hh 12
/work/build/../../src/harfbuzz/src/hb-null.hh 339
/work/build/../../src/harfbuzz/src/hb-unicode.cc 20
/work/build/../../src/harfbuzz/src/hb-vector.hh 445
/work/build/../../src/harfbuzz/src/hb-mutex.hh 3
/work/build/../../src/harfbuzz/src/hb-ucd.cc 13
/work/build/../../src/harfbuzz/src/hb-machinery.hh 756
/work/build/../../src/harfbuzz/src/hb-unicode.hh 11
/work/build/../../src/harfbuzz/src/hb-ucd-table.hh 6
/src/libass/libass/ass_rasterizer.c 2
/src/libass/libass/ass_fontselect.c 21
/src/libass/libass/ass_render_api.c 4
/src/libass/libass/ass_filesystem.c 7
/src/libass/libass/ass.c 43
/src/libass/libass/ass_utils.h 13
/src/libass/libass/ass_string.c 2
/src/libass/libass/ass_strtod.c 1
/src/libass/libass/ass_string.h 2
/src/libass/libass/ass_parse.c 22
/work/build/../../src/harfbuzz/src/hb-face.cc 10
/work/build/../../src/harfbuzz/src/hb-face.hh 5
/work/build/../../src/harfbuzz/src/hb-shaper.hh 6
/work/build/../../src/harfbuzz/src/hb-shaper-list.hh 16
/work/build/../../src/harfbuzz/src/hb-ot-face.hh 1
/work/build/../../src/harfbuzz/src/hb-ot-face.cc 2
/work/build/../../src/harfbuzz/src/hb-blob.cc 10
/work/build/../../src/harfbuzz/src/hb-blob.hh 86
/work/build/../../src/harfbuzz/src/hb-static.cc 3
/work/build/../../src/harfbuzz/src/hb-sanitize.hh 433
/work/build/../../src/harfbuzz/src/hb-dispatch.hh 24
/work/build/../../src/harfbuzz/src/OT/glyf/../../hb-ot-maxp-table.hh 4
/work/build/../../src/harfbuzz/src/hb-open-type.hh 579
/work/build/../../src/harfbuzz/src/hb-array.hh 215
/work/build/../../src/harfbuzz/src/OT/glyf/../../hb-ot-head-table.hh 2
/work/build/../../src/harfbuzz/src/hb-ot-var-fvar-table.hh 9
/work/build/../../src/harfbuzz/src/hb-iter.hh 343
/work/build/../../src/harfbuzz/src/hb-ot-var.cc 2
/work/build/../../src/harfbuzz/src/hb-ot-var-avar-table.hh 4
/work/build/../../src/harfbuzz/src/hb-ot-layout-common.hh 111
/work/build/../../src/harfbuzz/src/OT/Var/VARC/../../../hb-vector.hh 2
/work/build/../../src/harfbuzz/src/hb-meta.hh 67
/work/build/../../src/harfbuzz/src/hb-ot-shape.cc 39
/work/build/../../src/harfbuzz/src/hb-fallback-shape.cc 5
/work/build/../../src/harfbuzz/src/hb-shape-plan.cc 10
/work/build/../../src/harfbuzz/src/hb-shape-plan.hh 3
/work/build/../../src/harfbuzz/src/hb-ot-shape.hh 5
/work/build/../../src/harfbuzz/src/hb-ot-map.hh 21
/work/build/../../src/harfbuzz/src/hb-aat-map.hh 7
/work/build/../../src/harfbuzz/src/hb-ot-cmap-table.hh 2
/work/build/../../src/harfbuzz/src/OT/glyf/../../hb-ot-hmtx-table.hh 4
/work/build/../../src/harfbuzz/src/hb-ot-post-table.hh 2
/work/build/../../src/harfbuzz/src/OT/name/name.hh 2
/work/build/../../src/harfbuzz/src/hb-ot-meta-table.hh 2
/work/build/../../src/harfbuzz/src/OT/glyf/glyf.hh 1
/work/build/../../src/harfbuzz/src/OT/glyf/../../hb-ot-var-gvar-table.hh 3
/work/build/../../src/harfbuzz/src/hb-subset-plan.hh 1
/work/build/../../src/harfbuzz/src/hb-ot-cff1-table.hh 8
/work/build/../../src/harfbuzz/src/hb-cff-interp-dict-common.hh 7
/work/build/../../src/harfbuzz/src/hb-cff-interp-common.hh 5
/work/build/../../src/harfbuzz/src/hb-ot-cff2-table.hh 8
/work/build/../../src/harfbuzz/src/OT/Var/VARC/VARC.hh 3
/work/build/../../src/harfbuzz/src/hb-ot-kern-table.hh 41
/work/build/../../src/harfbuzz/src/hb-aat-layout-common.hh 254
/work/build/../../src/harfbuzz/src/hb-bit-set.hh 28
/work/build/../../src/harfbuzz/src/hb-aat-layout-kerx-table.hh 118
/work/build/../../src/harfbuzz/src/OT/Layout/GDEF/GDEF.hh 30
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/GSUB.hh 4
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/../../../hb-ot-layout-gsubgpos.hh 337
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/GPOS.hh 8
/work/build/../../src/harfbuzz/src/hb-aat-layout-morx-table.hh 149
/work/build/../../src/harfbuzz/src/OT/Color/COLR/COLR.hh 3
/work/build/../../src/harfbuzz/src/hb-paint-extents.hh 11
/work/build/../../src/harfbuzz/src/OT/Color/COLR/../../../hb-paint-bounded.hh 1
/work/build/../../src/harfbuzz/src/OT/Color/CBDT/CBDT.hh 2
/work/build/../../src/harfbuzz/src/OT/Color/sbix/sbix.hh 2
/work/build/../../src/harfbuzz/src/OT/Color/svg/svg.hh 3
/work/build/../../src/harfbuzz/src/hb-map.hh 21
/work/build/../../src/harfbuzz/src/hb-utf.hh 3
/work/build/../../src/harfbuzz/src/hb-shape.cc 2
/work/build/../../src/harfbuzz/src/hb-ot-layout.cc 35
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/SubstLookup.hh 5
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/SubstLookupSubTable.hh 2
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/SingleSubst.hh 2
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/SingleSubstFormat1.hh 4
/work/build/../../src/harfbuzz/src/OT/Layout/Common/CoverageFormat1.hh 2
/work/build/../../src/harfbuzz/src/OT/Layout/Common/CoverageFormat2.hh 2
/work/build/../../src/harfbuzz/src/OT/Var/VARC/../../../hb-open-type.hh 12
/work/build/../../src/harfbuzz/src/OT/Var/VARC/../../../hb-null.hh 5
/work/build/../../src/harfbuzz/src/OT/Layout/Common/Coverage.hh 3
/work/build/../../src/harfbuzz/src/OT/Layout/Common/RangeRecord.hh 1
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/SingleSubstFormat2.hh 3
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/MultipleSubst.hh 2
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/MultipleSubstFormat1.hh 3
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/Sequence.hh 2
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/AlternateSubst.hh 2
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/AlternateSubstFormat1.hh 3
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/AlternateSet.hh 2
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/LigatureSubst.hh 2
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/LigatureSubstFormat1.hh 5
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/LigatureSet.hh 4
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/Ligature.hh 3
/work/build/../../src/harfbuzz/src/OT/Layout/GDEF/../../../hb-ot-layout-common.hh 7
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/ReverseChainSingleSubst.hh 2
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/ReverseChainSingleSubstFormat1.hh 3
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/PosLookup.hh 3
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/PosLookupSubTable.hh 2
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/SinglePos.hh 2
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/SinglePosFormat1.hh 3
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/ValueFormat.hh 11
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/SinglePosFormat2.hh 3
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/PairPos.hh 2
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/PairPosFormat1.hh 4
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/PairSet.hh 3
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/PairPosFormat2.hh 4
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/CursivePos.hh 2
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/CursivePosFormat1.hh 5
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/Anchor.hh 2
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/AnchorFormat1.hh 2
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/AnchorFormat2.hh 2
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/AnchorFormat3.hh 2
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/MarkBasePos.hh 2
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/MarkBasePosFormat1.hh 4
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/MarkArray.hh 2
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/MarkRecord.hh 1
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/AnchorMatrix.hh 2
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/MarkLigPos.hh 2
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/MarkLigPosFormat1.hh 3
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/MarkMarkPos.hh 2
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/MarkMarkPosFormat1.hh 3
/work/build/../../src/harfbuzz/src/OT/Layout/GDEF/../../../hb-cache.hh 2
/work/build/../../src/harfbuzz/src/OT/Var/VARC/../../../hb-machinery.hh 2
/work/build/../../src/harfbuzz/src/OT/Layout/GDEF/../../../OT/Layout/Common/Coverage.hh 1
/work/build/../../src/harfbuzz/src/OT/Layout/GDEF/../../../OT/Layout/Common/CoverageFormat1.hh 1
/work/build/../../src/harfbuzz/src/OT/Var/VARC/../../../hb-array.hh 11
/work/build/../../src/harfbuzz/src/OT/Layout/GDEF/../../../OT/Layout/Common/CoverageFormat2.hh 1
/work/build/../../src/harfbuzz/src/OT/Layout/GDEF/../../../OT/Layout/Common/RangeRecord.hh 1
/work/build/../../src/harfbuzz/src/hb-shaper.cc 5
/work/build/../../src/harfbuzz/src/hb-ot-map.cc 6
/work/build/../../src/harfbuzz/src/hb-ot-tag.cc 11
/work/build/../../src/harfbuzz/src/hb-ot-tag-table.hh 1
/work/build/../../src/harfbuzz/src/hb-aat-layout.cc 15
/work/build/../../src/harfbuzz/src/hb-ot-shaper.hh 1
/work/build/../../src/harfbuzz/src/hb-aat-map.cc 2
/work/build/../../src/harfbuzz/src/hb-aat-ltag-table.hh 3
/work/build/../../src/harfbuzz/src/hb-cache.hh 11
/work/build/../../src/harfbuzz/src/hb-bit-page.hh 19
/work/build/../../src/harfbuzz/src/hb-aat-layout-trak-table.hh 11
/work/build/../../src/harfbuzz/src/hb-ot-stat-table.hh 7
/work/build/../../src/harfbuzz/src/hb-ot-layout.hh 49
/work/build/../../src/harfbuzz/src/hb-unicode-emoji-table.hh 3
/work/build/../../src/harfbuzz/src/hb-ot-shape-normalize.cc 10
/work/build/../../src/harfbuzz/src/hb-ot-shape-normalize.hh 1
/work/build/../../src/harfbuzz/src/hb-ot-shape-fallback.cc 11
/work/build/../../src/harfbuzz/src/OT/Var/VARC/../../../OT/Layout/Common/RangeRecord.hh 2
/work/build/../../src/harfbuzz/src/OT/Var/VARC/../../../hb-algs.hh 8
/work/build/../../src/harfbuzz/src/hb-aat-layout-feat-table.hh 8
/work/build/../../src/harfbuzz/src/hb-aat-layout.hh 1
/work/build/../../src/harfbuzz/src/hb-ot-layout-gsub-table.hh 2
/work/build/../../src/harfbuzz/src/OT/Var/VARC/../../../OT/Layout/Common/Coverage.hh 1
/work/build/../../src/harfbuzz/src/OT/Var/VARC/../../../OT/Layout/Common/CoverageFormat1.hh 1
/work/build/../../src/harfbuzz/src/OT/Var/VARC/../../../OT/Layout/Common/CoverageFormat2.hh 1
/work/build/../../src/harfbuzz/src/hb-ot-layout-gpos-table.hh 1
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/PairValueRecord.hh 1
/work/build/../../src/harfbuzz/src/hb-aat-layout-ankr-table.hh 2
/work/build/../../src/harfbuzz/src/hb-kern.hh 20
/work/build/../../src/harfbuzz/src/hb-geometry.hh 12
/work/build/../../src/harfbuzz/src/hb-paint-extents.cc 15
/work/build/../../src/harfbuzz/src/hb-paint.cc 21
/work/build/../../src/harfbuzz/src/hb-paint.hh 4
/work/build/../../src/harfbuzz/src/OT/Var/VARC/../../../hb-geometry.hh 5
/work/build/../../src/harfbuzz/src/hb-draw.cc 19
/work/build/../../src/harfbuzz/src/hb-draw.hh 8
/work/build/../../src/harfbuzz/src/hb-outline.hh 4
/work/build/../../src/harfbuzz/src/hb-outline.cc 13
/work/build/../../src/harfbuzz/src/hb-buffer-verify.cc 5
/work/build/../../src/harfbuzz/src/hb-cplusplus.hh 5
/work/build/../../src/harfbuzz/src/hb-buffer-serialize.cc 3
/src/libass/libass/ass_outline.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
hb_ot_font_set_funcs /work/build/../../src/harfbuzz/src/hb-ot-font.cc 1 ['N/A'] 54 0 32 6 3 7735 0 12606 8711

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

Functions statically reachable by fuzzers
62.0%
8984 / 14490
Cyclomatic complexity statically reachable by fuzzers
66.0%
32078 / 48443

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

Fuzz engine guidance

This sections provides heuristics that can be used as input to a fuzz engine when running a given fuzz target. The current focus is on providing input that is usable by libFuzzer.

/src/libass/fuzz/fuzz.c

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=['OT::OffsetTo >, OT::NumType, void, false>::operator()(void const*) const', 'void hb_bit_set_t::set_array(bool, unsigned int const*, unsigned int, unsigned int)', 'hb_blob_t* hb_sanitize_context_t::reference_table(hb_face_t const*, unsigned int)', 'OT::OffsetTo >, OT::NumType, void, false>::operator()(void const*) const', 'AAT::ankr::sanitize(hb_sanitize_context_t*) const', 'OT::OffsetTo >, OT::NumType, void, false>::operator()(void const*) const', 'OT::SortedArrayOf > >::as_array() const', 'hb_buffer_t::leave()', 'OT::OffsetTo, OT::NumType, void, false>, OT::NumType, void, false>::operator()(void const*) const', 'OT::ArrayOf >::operator[](int) const']

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
OT::Layout::GPOS_impl::MarkLigPosFormat1_2 ::apply(OT::hb_ot_apply_context_t*)const 53 16 30.18% ['libass_fuzzer']
OT::Layout::GPOS_impl::MarkMarkPosFormat1_2 ::apply(OT::hb_ot_apply_context_t*)const 47 14 29.78% ['libass_fuzzer']
AAT::KerxTable ::apply(AAT::hb_aat_apply_context_t*,AAT::kern_accelerator_data_tconst&)const 56 30 53.57% ['libass_fuzzer']
unsignedinthb_bit_storage (unsignedint) 49 5 10.20% ['libass_fuzzer']
unsignedinthb_popcount (hb_glyph_flags_t) 35 4 11.42% ['libass_fuzzer']
_ZL13hb_qsort_loopIN11hb_ot_map_t12lookup_map_tEZN10hb_array_tIS1_E6_qsortIS1_TnPN12hb_enable_ifIXsr3std18is_move_assignableIT_EE5valueEvE4typeELPv0EEE17hb_sorted_array_tIS1_E11hb_priorityILj1EEEUlRKS1_SG_E_EvPS6_mT0_ 37 3 8.108% ['libass_fuzzer']
hb_font_create_sub_font 37 20 54.05% ['libass_fuzzer']
hb_font_set_variations 33 14 42.42% ['libass_fuzzer']
OT::hb_kern_machine_t ::kern(hb_font_t*,hb_buffer_t*,unsignedint,bool)const 74 20 27.02% ['libass_fuzzer']
OT::GDEF::is_blocklisted(hb_blob_t*,hb_face_t*)const 49 8 16.32% ['libass_fuzzer']
decompose_current_character(hb_ot_shape_normalize_context_tconst*,bool) 43 19 44.18% ['libass_fuzzer']
decompose(hb_ot_shape_normalize_context_tconst*,bool,unsignedint) 33 6 18.18% ['libass_fuzzer']
hb_ot_shape_setup_masks_fraction(hb_ot_shape_context_tconst*) 49 3 6.122% ['libass_fuzzer']
arabic_fallback_synthesize_lookup_single(hb_ot_shape_plan_tconst*,hb_font_t*,unsignedint) 33 14 42.42% ['libass_fuzzer']
OT::Layout::GSUB_impl::SubstLookup*arabic_fallback_synthesize_lookup_ligature (hb_ot_shape_plan_tconst*,hb_font_t*,ligature_3_set_tconst(&)[1],unsignedint) 72 24 33.33% ['libass_fuzzer']
OT::Layout::GSUB_impl::SubstLookup*arabic_fallback_synthesize_lookup_ligature (hb_ot_shape_plan_tconst*,hb_font_t*,ligature_set_tconst(&)[18],unsignedint) 72 24 33.33% ['libass_fuzzer']
OT::Layout::GSUB_impl::SubstLookup*arabic_fallback_synthesize_lookup_ligature (hb_ot_shape_plan_tconst*,hb_font_t*,ligature_mark_set_tconst(&)[1],unsignedint) 72 24 33.33% ['libass_fuzzer']
arabic_joining(hb_buffer_t*) 62 28 45.16% ['libass_fuzzer']
apply_stch(hb_ot_shape_plan_tconst*,hb_buffer_t*,hb_font_t*) 160 3 1.875% ['libass_fuzzer']
find_syllables_use(hb_buffer_t*) 187 85 45.45% ['libass_fuzzer']
setup_topographical_masks(hb_ot_shape_plan_tconst*,hb_buffer_t*) 50 4 8.0% ['libass_fuzzer']
_hb_preprocess_text_vowel_constraints(hb_ot_shape_plan_tconst*,hb_buffer_t*,hb_font_t*) 407 11 2.702% ['libass_fuzzer']
hb_ot_tags_from_complex_language(charconst*,charconst*,unsignedint*,unsignedint*) 1210 118 9.752% ['libass_fuzzer']
parse_private_use_subtag(charconst*,unsignedint*,unsignedint*,charconst*,unsignedchar(*)(unsignedchar)) 32 2 6.25% ['libass_fuzzer']
OT::avar::map_coords_16_16(int*,unsignedint)const 38 7 18.42% ['libass_fuzzer']
hb_shape_full 31 15 48.38% ['libass_fuzzer']
hb_shapers_lazy_loader_t::create() 32 4 12.5% ['libass_fuzzer']
hb_ucd_decompose(hb_unicode_funcs_t*,unsignedint,unsignedint*,unsignedint*,void*) 33 4 12.12% ['libass_fuzzer']
ass_process_force_style 80 7 8.75% ['libass_fuzzer']
ass_drawing_parse 79 16 20.25% ['libass_fuzzer']
drawing_tokenize 79 43 54.43% ['libass_fuzzer']
ass_face_open 33 8 24.24% ['libass_fuzzer']
ass_font_provider_add_font 101 50 49.50% ['libass_fuzzer']
handle_selective_style_overrides 69 33 47.82% ['libass_fuzzer']
script_to_language 46 11 23.91% ['libass_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
[] []
/work/build/../../src/harfbuzz/src/hb-ot-shape-normalize.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/ReverseChainSingleSubst.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-null.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-cache.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-shaper-use.cc [] []
/work/build/../../src/harfbuzz/src/hb-ot-map.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-aat-map.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-buffer-serialize.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-cff-common.hh [] []
/work/build/../../src/harfbuzz/src/hb-cff1-interp-cs.hh [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/../../../OT/Layout/Common/CoverageFormat2.hh [] []
/work/build/hb-number-parser.rl [] []
/work/build/../../src/harfbuzz/src/OT/glyf/composite-iter.hh [] []
/work/build/../../src/harfbuzz/src/hb-bit-set-invertible.hh [] []
/work/build/../../src/harfbuzz/src/hb-cff-interp-common.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Var/VARC/../../../hb-algs.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/../../../hb-ot-layout-gsubgpos.hh [] []
/work/build/../../src/harfbuzz/src/hb-blob.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-bit-set.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/../../../OT/Layout/Common/RangeRecord.hh [] []
/work/build/../../src/harfbuzz/src/hb-ot-var-common.hh [] []
/work/build/../../src/harfbuzz/src/hb-ot-shaper-thai.cc [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/SingleSubstFormat2.hh ['libass_fuzzer'] []
/src/libass/libass/c/c_be_blur.c [] []
/src/libass/libass/ass_utils.c ['libass_fuzzer'] ['libass_fuzzer']
/work/build/../../src/harfbuzz/src/hb-utf.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Var/VARC/coord-setter.hh [] []
/work/build/../../src/harfbuzz/src/OT/Var/VARC/../../../hb-blob.hh [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/Ligature.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-aat-layout-morx-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Var/VARC/../../../hb-iter.hh [] []
/work/build/../../src/harfbuzz/src/OT/glyf/CompositeGlyph.hh [] []
/work/build/../../src/harfbuzz/src/OT/Var/VARC/../../../hb-ot-layout-common.hh [] []
/src/libass/libass/ass_render.c ['libass_fuzzer'] ['libass_fuzzer']
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/SinglePos.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/../../../hb-ot-layout-common.hh [] []
/work/build/../../src/harfbuzz/src/hb-ot-layout-common.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-paint-bounded.hh [] []
/work/build/../../src/harfbuzz/src/OT/Var/VARC/../../../hb-null.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-kern-table.hh ['libass_fuzzer'] []
/src/libass/libass/ass_library.c ['libass_fuzzer'] ['libass_fuzzer']
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/Sequence.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-cff2-table.cc [] []
/work/build/../../src/harfbuzz/src/hb-buffer-verify.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-meta.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-paint-extents.cc ['libass_fuzzer'] []
/src/libass/libass/c/blur_template.h [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/../../../OT/Layout/Common/Coverage.hh [] []
/src/libass/libass/ass_strtod.c ['libass_fuzzer'] ['libass_fuzzer']
/src/libass/libass/ass_string.h ['libass_fuzzer'] ['libass_fuzzer']
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/PairPosFormat2.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/Anchor.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-face.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Color/COLR/../CPAL/CPAL.hh [] []
/work/build/../../src/harfbuzz/src/hb-draw.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-var-mvar-table.hh [] []
/work/build/../../src/harfbuzz/src/OT/glyf/../../hb-ot-hmtx-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-shape-plan.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-mutex.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-post-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-shaper-hangul.cc [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/MarkMarkPos.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-set.hh [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/GPOS.hh ['libass_fuzzer'] []
/src/libass/libass/ass_bitmap.c [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/MultipleSubst.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-shape-fallback.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Color/COLR/COLR.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-font.cc [] []
/work/build/../../src/harfbuzz/src/hb-outline.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-free-pool.hh [] []
/work/build/../../src/harfbuzz/src/hb-blob.hh ['libass_fuzzer'] []
/src/libass/libass/c/c_blur.c [] []
/work/build/../../src/harfbuzz/src/hb-paint-bounded.cc [] []
/work/build/../../src/harfbuzz/src/hb-ot-shaper-arabic-joining-list.hh [] []
/src/libass/libass/ass_font.c ['libass_fuzzer'] ['libass_fuzzer']
/work/build/../../src/harfbuzz/src/OT/Var/VARC/../../../OT/Layout/Common/CoverageFormat2.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Var/VARC/../../../OT/Layout/Common/CoverageFormat1.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Var/VARC/../../../hb-array.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-metrics.cc [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/MarkArray.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/Common/CoverageFormat1.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-shaper-arabic-fallback.hh [] []
/src/libass/libass/ass_outline.c ['libass_fuzzer'] ['libass_fuzzer']
/work/build/../../src/harfbuzz/src/OT/Var/VARC/../../../hb-vector.hh ['libass_fuzzer'] []
/src/libass/libass/ass_parse.c ['libass_fuzzer'] ['libass_fuzzer']
/work/build/../../src/harfbuzz/src/hb-shaper.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-var-fvar-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/PairValueRecord.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/AnchorFormat2.hh ['libass_fuzzer'] []
/src/libass/libass/ass_rasterizer.c ['libass_fuzzer'] ['libass_fuzzer']
/work/build/../../src/harfbuzz/src/hb-ot-shape.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/glyf/SimpleGlyph.hh [] []
/work/build/../../src/harfbuzz/src/hb-draw.cc ['libass_fuzzer'] []
/work/build/hb-ot-shaper-use-machine.rl [] []
/work/build/../../src/harfbuzz/src/OT/Color/CBDT/CBDT.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-atomic.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-face.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-layout-gsub-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-buffer.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/Common/CoverageFormat2.hh ['libass_fuzzer'] []
/src/libass/libass/ass_filesystem.c ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-open-file.hh [] []
/src/libass/libass/ass_cache_template.h [] []
/work/build/../../src/harfbuzz/src/hb-bit-page.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/glyf/../../hb-ot-hhea-table.hh [] []
/work/build/../../src/harfbuzz/src/OT/Var/VARC/VARC.cc [] []
/src/libass/libass/ass_fontselect.c ['libass_fuzzer'] ['libass_fuzzer']
/work/build/../../src/harfbuzz/src/hb-ot-var.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Var/VARC/../../../OT/Layout/Common/RangeRecord.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-static.cc ['libass_fuzzer'] []
/src/libass/libass/c/c_blend_bitmaps.c [] []
/work/build/../../src/harfbuzz/src/OT/Var/VARC/VARC.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-common.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-shape.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-name-language-static.hh [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/SinglePosFormat2.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-sanitize.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/../../../OT/Layout/Common/CoverageFormat1.hh [] []
/work/build/hb-ot-shaper-khmer-machine.rl [] []
/work/build/../../src/harfbuzz/src/OT/glyf/GlyphHeader.hh [] []
/src/libass/libass/ass_cache.c ['libass_fuzzer'] ['libass_fuzzer']
/src/libass/libass/ass_blur.c [] []
/src/libass/libass/ass_bitmap_engine.c ['libass_fuzzer'] ['libass_fuzzer']
/work/build/../../src/harfbuzz/src/hb-ot-cff2-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GDEF/../../../hb-ot-layout-common.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-aat-layout-feat-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/PairPos.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-set.cc [] []
/work/build/../../src/harfbuzz/src/hb-cff2-interp-cs.hh [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GDEF/../../../hb-cache.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/glyf/glyf.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-shaper-list.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-outline.hh ['libass_fuzzer'] []
/src/libass/libass/ass_render_api.c ['libass_fuzzer'] ['libass_fuzzer']
/work/build/../../src/harfbuzz/src/hb-ot-layout.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-shaper-arabic-pua.hh [] []
/src/libass/libass/ass_shaper.c ['libass_fuzzer'] ['libass_fuzzer']
/work/build/hb-buffer-deserialize-text-glyphs.rl [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/MarkMarkPosFormat1.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-buffer.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-set-digest.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-face-builder.cc [] []
/work/build/../../src/harfbuzz/src/hb-ot-shaper-indic-table.cc [] []
/work/build/../../src/harfbuzz/src/hb-ot-var-avar-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-layout.cc ['libass_fuzzer'] []
/src/libass/libass/ass_utils.h ['libass_fuzzer'] ['libass_fuzzer']
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/SubstLookup.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/Common/Coverage.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-meta-table.hh ['libass_fuzzer'] []
/src/libass/libass/ass.c ['libass_fuzzer'] ['libass_fuzzer']
/work/build/../../src/harfbuzz/src/hb-face.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/AlternateSubst.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/MarkLigPos.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-aat-layout-kerx-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-debug.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/name/name.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-layout-base-table.hh [] []
/work/build/../../src/harfbuzz/src/hb-cff-interp-dict-common.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-cmap-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-shaper.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-array.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-shape-normalize.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Var/VARC/../../../hb-ot-cff-common.hh [] []
/src/libass/libass/wyhash.h [] []
/work/build/../../src/harfbuzz/src/hb-serialize.hh [] []
/work/build/../../src/harfbuzz/src/hb-kern.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-dispatch.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/LigatureSubst.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-paint.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-open-type.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-shaper-use-table.hh [] []
/work/build/../../src/harfbuzz/src/hb-ot-shaper-vowel-constraints.cc [] []
/work/build/hb-ot-shaper-indic-machine.rl [] []
/work/build/../../src/harfbuzz/src/OT/Var/VARC/../../../OT/Layout/Common/Coverage.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/glyf/../../hb-decycler.hh [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/LigatureSet.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-font.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-shaper-myanmar.cc [] []
/work/build/../../src/harfbuzz/src/OT/Var/VARC/../../../hb-machinery.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-vorg-table.hh [] []
/work/build/hb-buffer-deserialize-text-unicode.rl [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/AnchorMatrix.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/MarkLigPosFormat1.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/ValueFormat.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-face.hh ['libass_fuzzer'] []
/src/libass/libass/ass_drawing.c [] []
/work/build/../../src/harfbuzz/src/OT/glyf/../../hb-ot-var-hvar-table.hh [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/AnchorFormat1.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-shaper-hebrew.cc [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/LigatureSubstFormat1.hh ['libass_fuzzer'] []
/src/libass/libass/ass_fontconfig.c [] []
/work/build/hb-ot-shaper-myanmar-machine.rl [] []
/work/build/../../src/harfbuzz/src/OT/Color/COLR/../../../hb-paint-bounded.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/AnchorFormat3.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-object.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-aat-layout-trak-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/SubstLookupSubTable.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/CursivePosFormat1.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-subset-plan.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-shape-plan.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-shaper-indic.cc [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GDEF/../../../OT/Layout/Common/Coverage.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-cff1-table.cc [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/../../../hb-ot-layout-gsubgpos.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/MarkBasePos.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GDEF/../../../OT/Layout/Common/CoverageFormat2.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GDEF/GDEF.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-aat-layout-ankr-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/glyf/../../hb-paint.hh [] []
/work/build/../../src/harfbuzz/src/hb-map.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/MultipleSubstFormat1.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-machinery.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-paint.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-unicode-emoji-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/glyf/../../hb-ot-maxp-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/SingleSubstFormat1.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/PairPosFormat1.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-shaper-khmer.cc [] []
/work/build/../../src/harfbuzz/src/hb-shape.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/MarkBasePosFormat1.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/PosLookup.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-cplusplus.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-string-array.hh [] []
/work/build/../../src/harfbuzz/src/hb-ot-shaper-arabic.cc [] []
/src/libass/fuzz/fuzz.c ['libass_fuzzer'] ['libass_fuzzer']
/work/build/../../src/harfbuzz/src/failing-alloc.c ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-aat-layout.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-font.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Var/VARC/../../../hb-open-type.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-tag-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-shaper-arabic-table.hh [] []
/src/libass/libass/c/rasterizer_template.h [] []
/work/build/../../src/harfbuzz/src/OT/Var/VARC/../../../OT/glyf/glyf.hh [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/ReverseChainSingleSubstFormat1.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-unicode.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/Common/RangeRecord.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/CursivePos.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-shaper-syllabic.cc [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/MarkRecord.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-aat-ltag-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Var/VARC/../../../hb-geometry.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-aat-layout-common.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/glyf/path-builder.hh [] []
/work/build/../../src/harfbuzz/src/hb-paint-extents.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-hhea-table.hh [] []
/work/build/../../src/harfbuzz/src/hb-shaper.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/PosLookupSubTable.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-fallback-shape.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/glyf/Glyph.hh [] []
/work/build/../../src/harfbuzz/src/hb-algs.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/AlternateSet.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-cff-interp-cs-common.hh [] []
/work/build/../../src/harfbuzz/src/OT/glyf/../../hb-ot-head-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-unicode.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-aat-layout.hh ['libass_fuzzer'] []
/src/libass/libass/ass_outline.h [] []
/work/build/../../src/harfbuzz/src/hb-ucd.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/GSUB.hh ['libass_fuzzer'] []
/src/libass/libass/ass_string.c ['libass_fuzzer'] ['libass_fuzzer']
/work/build/../../src/harfbuzz/src/hb-ot-os2-table.hh [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GDEF/../../../OT/Layout/Common/RangeRecord.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-number.cc [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/AlternateSubstFormat1.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-map.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/PairSet.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-geometry.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-layout-gpos-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-tag.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-aat-map.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/glyf/../../hb-ot-var-gvar-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Color/sbix/sbix.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/glyf/loca.hh [] []
/work/build/../../src/harfbuzz/src/hb-ot-stat-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/SingleSubst.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/SinglePosFormat1.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GDEF/../../../OT/Layout/Common/CoverageFormat1.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-vector.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ft.cc [] []
/work/build/../../src/harfbuzz/src/OT/Color/svg/svg.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ucd-table.hh ['libass_fuzzer'] []
/work/build/hb-buffer-deserialize-json.rl [] []
/work/build/../../src/harfbuzz/src/OT/Var/VARC/../../../hb-meta.hh [] []
/work/build/../../src/harfbuzz/src/hb-iter.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-cff1-table.hh ['libass_fuzzer'] []

Directories in report

Directory
/work/build/../../src/harfbuzz/src/OT/Color/COLR/
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/../../../OT/Layout/Common/
/work/build/../../src/harfbuzz/src/OT/Var/VARC/../../../OT/Layout/Common/
/src/libass/libass/c/
/src/libass/fuzz/
/work/build/../../src/harfbuzz/src/OT/Var/VARC/
/work/build/../../src/harfbuzz/src/OT/Layout/GDEF/
/work/build/../../src/harfbuzz/src/OT/name/
/work/build/../../src/harfbuzz/src/OT/Color/COLR/../CPAL/
/work/build/../../src/harfbuzz/src/OT/Layout/GDEF/../../../OT/Layout/Common/
/work/build/../../src/harfbuzz/src/OT/Layout/GDEF/../../../
/src/libass/libass/
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/../../../
/work/build/../../src/harfbuzz/src/OT/Var/VARC/../../../
/work/build/../../src/harfbuzz/src/OT/Color/COLR/../../../
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/../../../
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/
/work/build/../../src/harfbuzz/src/OT/Layout/Common/
/work/build/../../src/harfbuzz/src/OT/Color/sbix/
/work/build/../../src/harfbuzz/src/OT/glyf/
/work/build/../../src/harfbuzz/src/OT/Var/VARC/../../../OT/glyf/
/work/build/../../src/harfbuzz/src/OT/Color/CBDT/
/work/build/../../src/harfbuzz/src/OT/Color/svg/
/work/build/
/work/build/../../src/harfbuzz/src/
/work/build/../../src/harfbuzz/src/OT/glyf/../../
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/

Metadata section

This sections shows the raw data that is used to produce this report. This is mainly used for further processing and developer debugging.

Fuzzer Calltree file Program data file Coverage file
libass_fuzzer fuzzerLogFile-0-PBN5HdQflh.data fuzzerLogFile-0-PBN5HdQflh.data.yaml libass_fuzzer.covreport