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: 2025-07-11

Project overview: libass

High level conclusions

Reachability and coverage overview

Functions statically reachable by fuzzers
44.0%
6129 / 13857
Cyclomatic complexity statically reachable by fuzzers
49.0%
22795 / 46412
Runtime code coverage of functions
50.0%
6905 / 13857

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 11213 7789 56 183 45929 22957 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 7417 63.0%
gold [1:9] 147 1.25%
yellow [10:29] 47 0.39%
greenyellow [30:49] 150 1.27%
lawngreen 50+ 3995 33.9%
All colors 11756 100

Fuzz blockers

The followings are the branches where fuzzer fails to bypass.

Unique non-covered Complexity Unique Reachable Complexities Unique Reachable Functions All non-covered Complexity All Reachable Complexity Function Name Function Callsite Blocked Branch
18447 18564 2 :

['hb_buffer_destroy', 'hb_buffer_t::verify(hb_buffer_t*, hb_font_t*, hb_feature_t const*, unsigned int, char const* const*)']

18447 18568 hb_shape_full call site: 11395 /work/build/../../src/harfbuzz/src/hb-shape.cc:157
6054 6054 1 :

['hb_aat_layout_position(hb_ot_shape_plan_t const*, hb_font_t*, hb_buffer_t*)']

13628 19264 hb_ot_shape_plan_t::position(hb_font_t*,hb_buffer_t*)const call site: 00000 /work/build/../../src/harfbuzz/src/hb-ot-shape.cc:274
5150 5150 1 :

['hb_aat_map_builder_t::compile(hb_aat_map_t&)']

6603 19933 hb_ot_shape_planner_t::compile(hb_ot_shape_plan_t&,hb_ot_shape_plan_key_tconst&) call site: 00000 /work/build/../../src/harfbuzz/src/hb-ot-shape.cc:113
1228 1228 1 :

['hb_font_set_var_named_instance']

1228 1228 hb_font_create call site: 01567 /work/build/../../src/harfbuzz/src/hb-font.cc:1967
448 448 1 :

['hb_ot_var_named_instance_get_design_coords']

448 1965 hb_font_set_variations call site: 01643 /work/build/../../src/harfbuzz/src/hb-font.cc:2889
293 428 16 :

['_ZN2OTplIPKNS_4avarETnPN12hb_enable_ifIXsr3std14is_convertibleIKT_PKvEE5valueEvE4typeELPv0EEERKNS_16DeltaSetIndexMapERS6_RKNS_8OffsetToISD_NS_7NumTypeILb1EjLj4EEEvLb1EEE', 'OT::NumType ::operator unsigned int() const', 'OT::ItemVariationStore::destroy_cache(OT::hb_scalar_cache_t*)', 'OT::ItemVariationStore::get_delta(unsigned int, int const*, unsigned int, OT::hb_scalar_cache_t*) const', 'hb_vector_t ::alloc(unsigned int, bool)', 'OT::ItemVariationStore::create_cache() const', '_hb_roundf(float) [clone .10739]', '_ZNK3$_3clIRiiiEEDTclL_ZL6hb_minEclL_ZL6hb_maxEclsr3stdE7forwardIT_Efp_Eclsr3stdE7forwardIT0_Efp0_EEclsr3stdE7forwardIT1_Efp1_EEEOS2_OS3_OS4_', 'hb_vector_t ::hb_vector_t()', 'OT::SegmentMaps const& StructAfter (OT::SegmentMaps const&)', 'hb_vector_t ::operator[](int)', '_ZN2OTplIPKNS_4avarETnPN12hb_enable_ifIXsr3std14is_convertibleIKT_PKvEE5valueEvE4typeELPv0EEERKNS_18ItemVariationStoreERS6_RKNS_8OffsetToISD_NS_7NumTypeILb1EjLj4EEEvLb1EEE', 'OT::DeltaSetIndexMap::map(unsigned int) const', 'hb_vector_t ::~hb_vector_t()', 'int* hb_vector_t ::push (int&)', 'hb_barrier() [clone .10696]']

293 428 OT::avar::map_coords_16_16(int*,unsignedint)const call site: 00000 /work/build/../../src/harfbuzz/src/hb-ot-var-avar-table.hh:378
162 162 1 :

['ass_update_embedded_fonts']

162 267 ass_start_frame call site: 00815 /src/libass/libass/ass_render.c:3093
91 91 1 :

['load_fonts_from_dir']

249 249 ass_embedded_fonts_add_provider call site: 00341 /src/libass/libass/ass_fontselect.c:1025
86 447 2 :

['hb_buffer_append', 'hb_buffer_create']

18533 44264 hb_shape_full call site: 02787 /work/build/../../src/harfbuzz/src/hb-shape.cc:139
83 83 1 :

['hb_buffer_t::delete_glyphs_inplace(bool (*)(hb_glyph_info_t const*))']

83 83 hb_ot_hide_default_ignorables(hb_buffer_t*,hb_font_t*) call site: 00000 /work/build/../../src/harfbuzz/src/hb-ot-shape.cc:828
78 80 3 :

['hb_buffer_t::_infos_find_min_cluster(hb_glyph_info_t const*, unsigned int, unsigned int, unsigned int)', 'hb_buffer_t::_infos_set_glyph_flags(hb_glyph_info_t*, unsigned int, unsigned int, unsigned int, unsigned int)', 'operator|=(hb_buffer_scratch_flags_t&, hb_buffer_scratch_flags_t)']

78 80 hb_buffer_t::_set_glyph_flags(unsignedint,unsignedint,unsignedint,bool,bool) call site: 00000 /work/build/../../src/harfbuzz/src/hb-buffer.hh:418
59 59 1 :

['add_background']

59 65 ass_render_event call site: 11685 /src/libass/libass/ass_render.c:3034

Runtime coverage analysis

Covered functions
2710
Functions that are reachable but not covered
5465
Reachable functions
11213
Percentage of reachable functions covered
51.26%
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 37
/work/build/../../src/harfbuzz/src/hb-object.hh 88
/work/build/../../src/harfbuzz/src/hb-common.cc 17
/work/build/../../src/harfbuzz/src/failing-alloc.c 5
/work/build/../../src/harfbuzz/src/hb-font.hh 48
/work/build/../../src/harfbuzz/src/hb-atomic.hh 163
/work/build/../../src/harfbuzz/src/hb-debug.hh 5
/src/libass/libass/ass_font.c 14
/work/build/../../src/harfbuzz/src/hb-buffer.cc 45
/work/build/../../src/harfbuzz/src/hb-buffer.hh 50
/work/build/../../src/harfbuzz/src/hb-null.hh 346
/work/build/../../src/harfbuzz/src/hb-unicode.cc 14
/work/build/../../src/harfbuzz/src/hb-vector.hh 371
/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 749
/work/build/../../src/harfbuzz/src/hb-unicode.hh 11
/work/build/../../src/harfbuzz/src/hb-ucd-table.hh 6
/work/build/../../src/harfbuzz/src/hb-algs.hh 229
/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 11
/work/build/../../src/harfbuzz/src/hb-blob.hh 85
/work/build/../../src/harfbuzz/src/hb-static.cc 3
/work/build/../../src/harfbuzz/src/hb-sanitize.hh 487
/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 705
/work/build/../../src/harfbuzz/src/hb-array.hh 192
/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 303
/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 110
/work/build/../../src/harfbuzz/src/hb-meta.hh 58
/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/hb-ot-kern-table.hh 41
/work/build/../../src/harfbuzz/src/hb-aat-layout-common.hh 252
/work/build/../../src/harfbuzz/src/hb-bit-set.hh 36
/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 289
/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 2
/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/GDEF/../../../OT/Layout/Common/CoverageFormat1.hh 2
/work/build/../../src/harfbuzz/src/OT/Layout/GDEF/../../../OT/Layout/Common/CoverageFormat2.hh 2
/work/build/../../src/harfbuzz/src/OT/Layout/Common/Coverage.hh 4
/work/build/../../src/harfbuzz/src/OT/Layout/Common/CoverageFormat1.hh 3
/work/build/../../src/harfbuzz/src/OT/Layout/Common/CoverageFormat2.hh 3
/work/build/../../src/harfbuzz/src/OT/Layout/Common/RangeRecord.hh 3
/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 7
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/LigatureSet.hh 2
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/Ligature.hh 2
/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 7
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/PairSet.hh 3
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/PairPosFormat2.hh 7
/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/hb-set-digest.hh 11
/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/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 9
/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-map.hh 19
/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 6
/work/build/../../src/harfbuzz/src/hb-bit-page.hh 21
/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/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/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 16
/work/build/../../src/harfbuzz/src/hb-paint-extents.cc 15
/work/build/../../src/harfbuzz/src/hb-paint.cc 20
/work/build/../../src/harfbuzz/src/hb-paint.hh 4
/work/build/../../src/harfbuzz/src/hb-draw.cc 18
/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 12
/work/build/../../src/harfbuzz/src/hb-buffer-verify.cc 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'] 52 0 34 6 3 7007 0 11405 7845

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

Functions statically reachable by fuzzers
62.0%
8549 / 13857
Cyclomatic complexity statically reachable by fuzzers
66.0%
30634 / 46412

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=['hb_bit_set_t::init()', 'OT::OffsetTo >, OT::NumType, void, false>::operator()(void const*) const', 'hb_blob_t* hb_sanitize_context_t::reference_table(hb_face_t const*, unsigned int)', 'hb_bit_set_t::get(unsigned int) const', 'AAT::ankr::sanitize(hb_sanitize_context_t*) const', 'OT::OffsetTo >, OT::NumType, void, false>::operator()(void const*) const', 'OT::OffsetTo >, OT::NumType, void, false>::operator()(void const*) const', 'OT::Layout::GPOS_impl::ValueFormat::get_len() const', 'hb_ot_tags_from_complex_language(char const*, char const*, unsigned int*, unsigned int*)', 'AAT::hb_aat_apply_context_t::~hb_aat_apply_context_t()']

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::MarkBasePosFormat1_2 ::apply(OT::hb_ot_apply_context_t*)const 43 5 11.62% ['libass_fuzzer']
unsignedinthb_bit_storage (unsignedint) 49 5 10.20% ['libass_fuzzer']
unsignedinthb_popcount (unsignedint) 35 4 11.42% ['libass_fuzzer']
unsignedinthb_popcount (hb_glyph_flags_t) 35 4 11.42% ['libass_fuzzer']
hb_buffer_t::_set_glyph_flags(unsignedint,unsignedint,unsignedint,bool,bool) 40 5 12.5% ['libass_fuzzer']
hb_font_create_sub_font 37 20 54.05% ['libass_fuzzer']
hb_font_set_variations 33 14 42.42% ['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 7 21.21% ['libass_fuzzer']
hb_ot_shape_setup_masks_fraction(hb_ot_shape_context_tconst*) 49 4 8.163% ['libass_fuzzer']
arabic_fallback_synthesize_lookup_single(hb_ot_shape_plan_tconst*,hb_font_t*,unsignedint) 33 17 51.51% ['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']
joining_type(unsignedint) 33 12 36.36% ['libass_fuzzer']
arabic_joining(hb_buffer_t*) 62 33 53.22% ['libass_fuzzer']
apply_stch(hb_ot_shape_plan_tconst*,hb_buffer_t*,hb_font_t*) 136 3 2.205% ['libass_fuzzer']
reorder_marks_arabic(hb_ot_shape_plan_tconst*,hb_buffer_t*,unsignedint,unsignedint) 37 18 48.64% ['libass_fuzzer']
preprocess_text_hangul(hb_ot_shape_plan_tconst*,hb_buffer_t*,hb_font_t*) 160 16 10.0% ['libass_fuzzer']
preprocess_text_thai(hb_ot_shape_plan_tconst*,hb_buffer_t*,hb_font_t*) 42 19 45.23% ['libass_fuzzer']
hb_ot_shaper_categorize(hb_script_t,hb_direction_t,unsignedint) 140 17 12.14% ['libass_fuzzer']
hb_ot_tags_from_complex_language(charconst*,charconst*,unsignedint*,unsignedint*) 1210 111 9.173% ['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 34 7 20.58% ['libass_fuzzer']
hb_blob_t*hb_sanitize_context_t::sanitize_blob (hb_blob_t*) 54 11 20.37% ['libass_fuzzer']
hb_blob_t*hb_sanitize_context_t::sanitize_blob (hb_blob_t*) 54 21 38.88% ['libass_fuzzer']
hb_blob_t*hb_sanitize_context_t::sanitize_blob (hb_blob_t*) 54 25 46.29% ['libass_fuzzer']
hb_blob_t*hb_sanitize_context_t::sanitize_blob (hb_blob_t*) 54 21 38.88% ['libass_fuzzer']
hb_blob_t*hb_sanitize_context_t::sanitize_blob (hb_blob_t*) 54 11 20.37% ['libass_fuzzer']
hb_blob_t*hb_sanitize_context_t::sanitize_blob (hb_blob_t*) 54 25 46.29% ['libass_fuzzer']
hb_blob_t*hb_sanitize_context_t::sanitize_blob (hb_blob_t*) 54 21 38.88% ['libass_fuzzer']
hb_blob_t*hb_sanitize_context_t::sanitize_blob (hb_blob_t*) 54 11 20.37% ['libass_fuzzer']
hb_blob_t*hb_sanitize_context_t::sanitize_blob (hb_blob_t*) 54 11 20.37% ['libass_fuzzer']
hb_blob_t*hb_sanitize_context_t::sanitize_blob (hb_blob_t*) 54 11 20.37% ['libass_fuzzer']
hb_blob_t*hb_sanitize_context_t::sanitize_blob (hb_blob_t*) 54 11 20.37% ['libass_fuzzer']
hb_shape_full 33 16 48.48% ['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 14 42.42% ['libass_fuzzer']
ass_process_force_style 80 7 8.75% ['libass_fuzzer']
ass_drawing_parse 80 16 20.0% ['libass_fuzzer']
drawing_tokenize 80 40 50.0% ['libass_fuzzer']
ass_face_open 34 8 23.52% ['libass_fuzzer']
ass_font_provider_add_font 102 50 49.01% ['libass_fuzzer']
handle_selective_style_overrides 69 33 47.82% ['libass_fuzzer']
script_to_language 46 12 26.08% ['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-set-digest.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-aat-layout.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-sanitize.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-aat-layout-trak-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-draw.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-shaper-syllabic.cc [] []
/work/build/../../src/harfbuzz/src/hb-ot-shaper-indic.cc [] []
/src/libass/libass/ass_bitmap_engine.c ['libass_fuzzer'] ['libass_fuzzer']
/work/build/../../src/harfbuzz/src/hb-ot-shaper-khmer.cc [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/PairPosFormat1.hh ['libass_fuzzer'] []
/work/build/hb-buffer-deserialize-text-glyphs.rl [] []
/work/build/../../src/harfbuzz/src/hb-ot-shaper-indic-table.cc [] []
/src/libass/libass/wyhash.h [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/PairSet.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/glyf/Glyph.hh [] []
/work/build/../../src/harfbuzz/src/hb-cff2-interp-cs.hh [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/SinglePosFormat1.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/PairPos.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/PairPosFormat2.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-layout-common.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-shape-plan.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-var.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-shape-plan.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/AnchorFormat3.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-cff-interp-common.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-font.cc [] []
/work/build/../../src/harfbuzz/src/hb-number.cc [] []
/work/build/../../src/harfbuzz/src/hb-ot-shaper.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/Ligature.hh ['libass_fuzzer'] []
/src/libass/libass/ass_library.c ['libass_fuzzer'] ['libass_fuzzer']
/work/build/../../src/harfbuzz/src/hb-cache.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-utf.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-kern-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/AnchorFormat1.hh ['libass_fuzzer'] []
/src/libass/libass/ass_utils.c ['libass_fuzzer'] ['libass_fuzzer']
/work/build/../../src/harfbuzz/src/hb-set.hh [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/CursivePosFormat1.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-tag-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-paint-extents.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ucd-table.hh ['libass_fuzzer'] []
/src/libass/libass/c/c_be_blur.c [] []
/work/build/../../src/harfbuzz/src/hb-aat-layout-common.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-serialize.hh [] []
/work/build/../../src/harfbuzz/src/hb-open-type.hh ['libass_fuzzer'] []
/src/libass/libass/ass_cache_template.h [] []
/work/build/../../src/harfbuzz/src/hb-ot-name-language-static.hh [] []
/work/build/../../src/harfbuzz/src/hb-ot-layout-gpos-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/glyf/../../hb-decycler.hh [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/MarkRecord.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-buffer-serialize.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-array.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/Common/RangeRecord.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-var-mvar-table.hh [] []
/src/libass/libass/ass.c ['libass_fuzzer'] ['libass_fuzzer']
/work/build/../../src/harfbuzz/src/OT/glyf/SimpleGlyph.hh [] []
/work/build/../../src/harfbuzz/src/OT/glyf/GlyphHeader.hh [] []
/src/libass/libass/ass_outline.h [] []
/src/libass/libass/ass_drawing.c [] []
/work/build/../../src/harfbuzz/src/hb-aat-layout.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-paint-bounded.hh [] []
/work/build/../../src/harfbuzz/src/hb-aat-map.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/name/name.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-blob.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GDEF/GDEF.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/glyf/../../hb-ot-maxp-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-var-avar-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-shaper.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/GPOS.hh ['libass_fuzzer'] []
/src/libass/libass/ass_rasterizer.c ['libass_fuzzer'] ['libass_fuzzer']
/work/build/../../src/harfbuzz/src/hb-ot-map.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-set.cc [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/MarkLigPosFormat1.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-shaper-hangul.cc [] []
/work/build/../../src/harfbuzz/src/hb-blob.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-bit-set-invertible.hh [] []
/work/build/../../src/harfbuzz/src/hb-face.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-shaper-thai.cc [] []
/src/libass/libass/ass_parse.c ['libass_fuzzer'] ['libass_fuzzer']
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/CursivePos.hh ['libass_fuzzer'] []
/work/build/hb-ot-shaper-myanmar-machine.rl [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/AlternateSubst.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/AnchorMatrix.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/glyf/../../hb-ot-hmtx-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-face.hh ['libass_fuzzer'] []
/src/libass/libass/ass_filesystem.c ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-buffer-verify.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-layout.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-buffer.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-cff-interp-cs-common.hh [] []
/work/build/../../src/harfbuzz/src/hb-ot-shaper-myanmar.cc [] []
/work/build/../../src/harfbuzz/src/hb-unicode.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/PosLookup.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Color/COLR/../CPAL/CPAL.hh [] []
/work/build/../../src/harfbuzz/src/hb-font.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/MarkMarkPosFormat1.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-cff-common.hh [] []
/work/build/../../src/harfbuzz/src/hb-ot-cff2-table.cc [] []
/work/build/../../src/harfbuzz/src/hb-ot-vorg-table.hh [] []
/work/build/../../src/harfbuzz/src/hb-ot-layout-base-table.hh [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/SinglePos.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-map.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-mutex.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-shaper-arabic-pua.hh [] []
/work/build/../../src/harfbuzz/src/hb-ot-var-common.hh [] []
/work/build/../../src/harfbuzz/src/hb-ot-shape-fallback.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-null.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/MarkLigPos.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-aat-layout-ankr-table.hh ['libass_fuzzer'] []
/src/libass/libass/ass_bitmap.c [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/../../../hb-ot-layout-gsubgpos.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-bit-page.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-subset-plan.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/LigatureSubstFormat1.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-bit-set.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/glyf/../../hb-ot-var-hvar-table.hh [] []
/src/libass/libass/c/c_blend_bitmaps.c [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/MarkBasePos.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GDEF/../../../OT/Layout/Common/Coverage.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-shaper-hebrew.cc [] []
/work/build/../../src/harfbuzz/src/hb-draw.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-aat-layout-morx-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-cff1-table.cc [] []
/src/libass/libass/ass_string.h ['libass_fuzzer'] ['libass_fuzzer']
/work/build/../../src/harfbuzz/src/OT/Color/svg/svg.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-shape-normalize.hh ['libass_fuzzer'] []
/work/build/hb-buffer-deserialize-json.rl [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GDEF/../../../OT/Layout/Common/CoverageFormat1.hh ['libass_fuzzer'] []
/work/build/hb-number-parser.rl [] []
/src/libass/libass/ass_fontconfig.c [] []
/work/build/../../src/harfbuzz/src/hb-ot-shaper-arabic.cc [] []
/work/build/hb-ot-shaper-indic-machine.rl [] []
/src/libass/libass/ass_render.c ['libass_fuzzer'] ['libass_fuzzer']
/src/libass/libass/ass_fontselect.c ['libass_fuzzer'] ['libass_fuzzer']
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/../../../OT/Layout/Common/RangeRecord.hh [] []
/work/build/../../src/harfbuzz/src/hb-paint-extents.hh ['libass_fuzzer'] []
/src/libass/libass/ass_render_api.c ['libass_fuzzer'] ['libass_fuzzer']
/work/build/../../src/harfbuzz/src/hb-outline.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-paint.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/SingleSubst.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/PairValueRecord.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/failing-alloc.c ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-iter.hh ['libass_fuzzer'] []
/src/libass/libass/ass_font.c ['libass_fuzzer'] ['libass_fuzzer']
/work/build/../../src/harfbuzz/src/hb-ot-shaper-arabic-fallback.hh [] []
/work/build/../../src/harfbuzz/src/hb-face.hh ['libass_fuzzer'] []
/src/libass/libass/ass_utils.h ['libass_fuzzer'] ['libass_fuzzer']
/work/build/../../src/harfbuzz/src/OT/glyf/CompositeGlyph.hh [] []
/work/build/../../src/harfbuzz/src/hb-ucd.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-hhea-table.hh [] []
/src/libass/libass/c/rasterizer_template.h [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/../../../OT/Layout/Common/Coverage.hh [] []
/work/build/../../src/harfbuzz/src/OT/Layout/Common/CoverageFormat1.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-shaper-use-table.hh [] []
/work/build/../../src/harfbuzz/src/hb-ot-shape-normalize.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/glyf/composite-iter.hh [] []
/work/build/../../src/harfbuzz/src/hb-common.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-paint-bounded.cc [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/LigatureSubst.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/LigatureSet.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/Anchor.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/glyf/../../hb-ot-head-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-cff1-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/ReverseChainSingleSubst.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-algs.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-tag.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/PosLookupSubTable.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/ValueFormat.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-aat-map.cc ['libass_fuzzer'] []
/src/libass/libass/ass_string.c ['libass_fuzzer'] ['libass_fuzzer']
/work/build/../../src/harfbuzz/src/hb-shaper-list.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-stat-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-shaper-arabic-joining-list.hh [] []
/work/build/../../src/harfbuzz/src/hb-face-builder.cc [] []
/work/build/../../src/harfbuzz/src/hb-unicode.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/../../../OT/Layout/Common/CoverageFormat1.hh [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/SingleSubstFormat1.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ft.cc [] []
/work/build/../../src/harfbuzz/src/hb-string-array.hh [] []
/usr/local/bin/../include/c++/v1/stdlib.h [] []
/work/build/../../src/harfbuzz/src/hb-map.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-fallback-shape.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Color/COLR/../../../hb-paint-bounded.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-cff1-interp-cs.hh [] []
/work/build/../../src/harfbuzz/src/hb-ot-os2-table.hh [] []
/work/build/../../src/harfbuzz/src/OT/Color/COLR/COLR.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-shape.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/../../../hb-ot-layout-gsubgpos.hh [] []
/work/build/../../src/harfbuzz/src/hb-ot-shaper-use.cc [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/AnchorFormat2.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/AlternateSubstFormat1.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/GSUB/../../../hb-ot-layout-common.hh [] []
/work/build/../../src/harfbuzz/src/hb-ot-cff2-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-layout-gsub-table.hh ['libass_fuzzer'] []
/src/libass/libass/ass_shaper.c ['libass_fuzzer'] ['libass_fuzzer']
/work/build/../../src/harfbuzz/src/OT/glyf/loca.hh [] []
/work/build/../../src/harfbuzz/src/hb-geometry.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-post-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/MarkBasePosFormat1.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/SubstLookup.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-cmap-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/SubstLookupSubTable.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-aat-layout-feat-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/MultipleSubst.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-shape.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-face.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-debug.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-machinery.hh ['libass_fuzzer'] []
/work/build/hb-ot-shaper-use-machine.rl [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GDEF/../../../OT/Layout/Common/RangeRecord.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/glyf/path-builder.hh [] []
/work/build/../../src/harfbuzz/src/hb-unicode-emoji-table.hh ['libass_fuzzer'] []
/src/libass/libass/ass_outline.c ['libass_fuzzer'] ['libass_fuzzer']
/work/build/../../src/harfbuzz/src/OT/Layout/GDEF/../../../hb-cache.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/SinglePosFormat2.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-cff-interp-dict-common.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-meta.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-aat-ltag-table.hh ['libass_fuzzer'] []
/src/libass/libass/ass_blur.c [] []
/work/build/../../src/harfbuzz/src/hb-paint.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-meta-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-static.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/Common/Coverage.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/SingleSubstFormat2.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/ReverseChainSingleSubstFormat1.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-kern.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-atomic.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-shaper-vowel-constraints.cc [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/GSUB.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-cplusplus.hh [] []
/work/build/../../src/harfbuzz/src/hb-ot-layout.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-var-fvar-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/glyf/../../hb-ot-hhea-table.hh [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/Sequence.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'] []
/work/build/../../src/harfbuzz/src/hb-pool.hh [] []
/work/build/../../src/harfbuzz/src/OT/glyf/glyf.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/MultipleSubstFormat1.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-shaper.cc ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/MarkArray.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-object.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-open-file.hh [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GDEF/../../../hb-ot-layout-common.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/MarkMarkPos.hh ['libass_fuzzer'] []
/src/libass/libass/ass_cache.c ['libass_fuzzer'] ['libass_fuzzer']
/work/build/../../src/harfbuzz/src/OT/glyf/../../hb-paint.hh [] []
/work/build/../../src/harfbuzz/src/hb-ot-shape.cc ['libass_fuzzer'] []
/work/build/hb-buffer-deserialize-text-unicode.rl [] []
/src/libass/libass/c/blur_template.h [] []
/work/build/../../src/harfbuzz/src/hb-dispatch.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-ot-metrics.cc [] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/../../../OT/Layout/Common/CoverageFormat2.hh [] []
/work/build/../../src/harfbuzz/src/hb-ot-shaper-arabic-table.hh [] []
/work/build/../../src/harfbuzz/src/hb-vector.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Color/CBDT/CBDT.hh ['libass_fuzzer'] []
/work/build/hb-ot-shaper-khmer-machine.rl [] []
/src/libass/libass/ass_strtod.c ['libass_fuzzer'] ['libass_fuzzer']
/work/build/../../src/harfbuzz/src/OT/glyf/../../hb-ot-var-gvar-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/AlternateSet.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/OT/Color/sbix/sbix.hh ['libass_fuzzer'] []
/src/libass/fuzz/fuzz.c ['libass_fuzzer'] ['libass_fuzzer']
/src/libass/libass/c/c_blur.c [] []
/work/build/../../src/harfbuzz/src/hb-font.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-aat-layout-kerx-table.hh ['libass_fuzzer'] []
/work/build/../../src/harfbuzz/src/hb-outline.cc ['libass_fuzzer'] []

Directories in report

Directory
/work/build/../../src/harfbuzz/src/OT/glyf/
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/../../../OT/Layout/Common/
/work/build/../../src/harfbuzz/src/OT/Layout/GDEF/../../../
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/../../../
/work/build/../../src/harfbuzz/src/OT/Color/CBDT/
/work/build/../../src/harfbuzz/src/OT/Color/COLR/
/work/build/../../src/harfbuzz/src/OT/Color/svg/
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/
/work/build/../../src/harfbuzz/src/OT/name/
/work/build/../../src/harfbuzz/src/OT/Layout/GDEF/../../../OT/Layout/Common/
/src/libass/libass/
/work/build/../../src/harfbuzz/src/OT/Color/COLR/../CPAL/
/work/build/../../src/harfbuzz/src/OT/Layout/GPOS/../../../
/work/build/../../src/harfbuzz/src/OT/Layout/Common/
/work/build/../../src/harfbuzz/src/
/src/libass/libass/c/
/src/libass/fuzz/
/work/build/../../src/harfbuzz/src/OT/Layout/GDEF/
/work/build/
/work/build/../../src/harfbuzz/src/OT/Layout/GSUB/
/work/build/../../src/harfbuzz/src/OT/Color/COLR/../../../
/work/build/../../src/harfbuzz/src/OT/glyf/../../
/work/build/../../src/harfbuzz/src/OT/Color/sbix/
/usr/local/bin/../include/c++/v1/

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-bEAT1VAOzx.data fuzzerLogFile-0-bEAT1VAOzx.data.yaml libass_fuzzer.covreport