Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked	Calltree index	Parent function	Callsite	Largest blocked function
5	8	Pl_PNGFilter::Pl_PNGFilter(char const, Pipeline, Pl_PNGFilter::action_e, unsigned int, unsigned int, unsigned int)	call site: 00008	__cxa_allocate_exception
5	14	Pl_PNGFilter::Pl_PNGFilter(char const, Pipeline, Pl_PNGFilter::action_e, unsigned int, unsigned int, unsigned int)	call site: 00014	__cxa_allocate_exception
4	27	Pl_PNGFilter::write(unsigned char const*, unsigned long)	call site: 00027
3	53	FuzzHelper::run()	call site: 00053	__cxa_end_catch

Fuzzer calltree


         LLVMFuzzerTestOneInput

[function] [call site] 00000


           FuzzHelper::FuzzHelper(unsigned char const*, unsigned long)

[function] [call site] 00001


           FuzzHelper::run()

[function] [call site] 00002


             FuzzHelper::doChecks()

[function] [call site] 00003


               Pl_Discard::Pl_Discard()

[function] [call site] 00004


                 Pipeline::Pipeline(char const*, Pipeline*)

[function] [call site] 00005


               Pl_PNGFilter::Pl_PNGFilter(char const*, Pipeline*, Pl_PNGFilter::action_e, unsigned int, unsigned int, unsigned int)

[function] [call site] 00006


                 Pipeline::Pipeline(char const*, Pipeline*)

[function] [call site] 00007


                 void qpdf::util::assertion<char const (&) [52]>(bool, char const (&) [52])

[function] [call site] 00008


                   __cxa_allocate_exception

[call site] 00009


                   std::logic_error::logic_error(char const*)

[call site] 00010


                   __cxa_throw

[call site] 00011


                   std::logic_error::~logic_error()

[call site] 00012


                   __cxa_free_exception

[call site] 00013


                 void qpdf::util::no_ci_rt_error_if<char const (&) [49]>(bool, char const (&) [49])

[function] [call site] 00014


                   __cxa_allocate_exception

[call site] 00015


                   std::runtime_error::runtime_error(char const*)

[call site] 00016


                   __cxa_throw

[call site] 00017


                   std::runtime_error::~runtime_error()

[call site] 00018


                   __cxa_free_exception

[call site] 00019


                 void qpdf::util::no_ci_rt_error_if<char const (&) [69]>(bool, char const (&) [69])

[function] [call site] 00020


                 void qpdf::util::no_ci_rt_error_if<char const (&) [45]>(bool, char const (&) [45])

[function] [call site] 00021


                 void qpdf::util::no_ci_rt_error_if<char const (&) [32]>(bool, char const (&) [32])

[function] [call site] 00022


                 std::__1::shared_ptr<unsigned char> QUtil::make_shared_array<unsigned char>(unsigned long)

[function] [call site] 00023


                 std::__1::shared_ptr<unsigned char> QUtil::make_shared_array<unsigned char>(unsigned long)

[function] [call site] 00024


                 Pipeline::~Pipeline()

[function] [call site] 00025


               Pl_PNGFilter::write(unsigned char const*, unsigned long)

[function] [call site] 00026


                 Pl_PNGFilter::processRow()

[function] [call site] 00027


                   Pl_PNGFilter::encodeRow()

[function] [call site] 00028


                     Pipeline::next() const

[function] [call site] 00029


                     Pipeline::next() const

[function] [call site] 00030


                     Pipeline::next() const

[function] [call site] 00031


                   Pl_PNGFilter::decodeRow()

[function] [call site] 00032


                     Pl_PNGFilter::decodeSub()

[function] [call site] 00033


                       QTC::TC(char const*, char const*, int)

[function] [call site] 00034


                     Pl_PNGFilter::decodeUp()

[function] [call site] 00035


                       QTC::TC(char const*, char const*, int)

[function] [call site] 00036


                     Pl_PNGFilter::decodeAverage()

[function] [call site] 00037


                       QTC::TC(char const*, char const*, int)

[function] [call site] 00038


                     Pl_PNGFilter::decodePaeth()

[function] [call site] 00039


                       QTC::TC(char const*, char const*, int)

[function] [call site] 00040


                       Pl_PNGFilter::PaethPredictor(int, int, int)

[function] [call site] 00041


                         abs_diff(int, int)

[function] [call site] 00042


                         abs_diff(int, int)

[function] [call site] 00043


                         abs_diff(int, int)

[function] [call site] 00044


                     Pipeline::next() const

[function] [call site] 00045


               Pl_PNGFilter::finish()

[function] [call site] 00046


                 Pl_PNGFilter::processRow()

[function] [call site] 00047


                 Pipeline::next() const

[function] [call site] 00048


               Pl_PNGFilter::~Pl_PNGFilter()

[function] [call site] 00049


                 Pipeline::~Pipeline()

[function] [call site] 00050


               Pl_Discard::~Pl_Discard()

[function] [call site] 00051


                 Pipeline::~Pipeline()

[function] [call site] 00052


             __cxa_begin_catch

[call site] 00053


             __cxa_end_catch

[call site] 00054


             __clang_call_terminate

[call site] 00055


               __cxa_begin_catch

[call site] 00056