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

Table of contents

Project overview: wabt
High level conclusions
Reachability and coverage overview
Fuzzers overview
Project functions overview
Fuzzer details
Fuzzer: wasm2wat_fuzzer
Call tree
Fuzz blockers
Runtime coverage analysis
Files reached
Fuzzer: read_binary_ir_fuzzer
Call tree
Fuzz blockers
Runtime coverage analysis
Files reached
Fuzzer: wasm_objdump_fuzzer
Call tree
Fuzz blockers
Runtime coverage analysis
Files reached
Fuzzer: wat2wasm_fuzzer
Call tree
Fuzz blockers
Runtime coverage analysis
Files reached
Fuzzer: read_binary_interp_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/wasm2wat_fuzzer.cc
Dictionary
Fuzzer function priority
/src/read_binary_ir_fuzzer.cc
Dictionary
Fuzzer function priority
/src/wasm_objdump_fuzzer.cc
Dictionary
Fuzzer function priority
/src/wat2wasm_fuzzer.cc
Dictionary
Fuzzer function priority
/src/read_binary_interp_fuzzer.cc
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: 2024-07-27

Project overview: wabt

High level conclusions

Reachability and coverage overview

Functions statically reachable by fuzzers
24.0%
1010 / 4164
Cyclomatic complexity statically reachable by fuzzers
33.0%
4282 / 13010
Runtime code coverage of functions
51.0%
2110 / 4164

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
wasm2wat_fuzzer /src/wasm2wat_fuzzer.cc 317 1289 12 22 5083 1543 wasm2wat_fuzzer.cc
read_binary_ir_fuzzer /src/read_binary_ir_fuzzer.cc 391 1359 12 22 5294 1693 read_binary_ir_fuzzer.cc
wasm_objdump_fuzzer /src/wasm_objdump_fuzzer.cc 403 837 12 21 5234 1644 wasm_objdump_fuzzer.cc
wat2wasm_fuzzer /src/wat2wasm_fuzzer.cc 1902 1365 21 39 12268 4135 wat2wasm_fuzzer.cc
read_binary_interp_fuzzer /src/read_binary_interp_fuzzer.cc 393 2359 12 24 5288 1687 read_binary_interp_fuzzer.cc

Project functions overview

The following table shows data about each function in the project. The functions included in this table correspond to all functions that exist in the executables of the fuzzers. As such, there may be functions that are from third-party libraries.

For further technical details on the meaning of columns in the below table, please see the Glossary .

Func name Functions filename Args Function call depth Reached by Fuzzers Fuzzers runtime hit Func lines hit % I Count BB Count Cyclomatic complexity Functions reached Reached by functions Accumulated cyclomatic complexity Undiscovered complexity

Fuzzer details

Fuzzer: wasm2wat_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 0 340 21.9%
gold [1:9] 18 1.16%
yellow [10:29] 25 1.61%
greenyellow [30:49] 5 0.32%
lawngreen 50+ 1159 74.9%
All colors 1547 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
139 139 1 :

['wabt::(anonymous namespace)::BinaryReader::ReadNameSection(unsigned long)']

139 179 wabt::(anonymousnamespace)::BinaryReader::ReadCustomSection(unsignedint,unsignedlong) call site: 00000 /src/wabt/src/binary-reader.cc:2410
102 102 1 :

['wabt::(anonymous namespace)::BinaryReader::ReadU64Leb128(unsigned long*, char const*)']

102 116 wabt::(anonymousnamespace)::BinaryReader::ReadMemory(wabt::Limits*) call site: 00000 /src/wabt/src/binary-reader.cc:614
88 92 3 :

['wabt::(anonymous namespace)::BinaryReader::ReadCodeMetadataSection(std::__1::basic_string_view >, unsigned long)', 'std::__1::basic_string_view >::remove_prefix[abi:v180000](unsigned long)', 'wabt::Failed(wabt::Result)']

88 128 wabt::(anonymousnamespace)::BinaryReader::ReadCustomSection(unsignedint,unsignedlong) call site: 00000 /src/wabt/src/binary-reader.cc:2424
51 77 3 :

['wabt::(anonymous namespace)::BinaryReader::ReadMemidx(unsigned int*, char const*)', 'wabt::Features::multi_memory_enabled() const', 'wabt::(anonymous namespace)::BinaryReader::PrintError(char const*, ...)']

51 201 wabt::(anonymousnamespace)::BinaryReader::ReadMemLocation(unsignedlong*,unsignedint*,unsignedlong*,charconst*,charconst*,charconst*,unsignedchar*) call site: 00000 /src/wabt/src/binary-reader.cc:458
51 51 1 :

['wabt::(anonymous namespace)::BinaryReader::ReadU64Leb128(unsigned long*, char const*)']

51 51 wabt::(anonymousnamespace)::BinaryReader::ReadAddress(unsignedlong*,unsignedint,charconst*) call site: 00000 /src/wabt/src/binary-reader.cc:657
20 20 5 :

['std::__1::vector >::empty[abi:v180000]() const', 'wabt::TryExpr* wabt::cast (wabt::Expr*)', 'std::__1::vector >::push_back[abi:v180000](wabt::Catch&&)', 'std::__1::vector >::back[abi:v180000]()', 'wabt::Catch::IsCatchAll() const']

20 40 wabt::(anonymousnamespace)::BinaryReaderIR::AppendCatch(wabt::Catch&&) call site: 00000 /src/wabt/src/binary-reader-ir.cc:1194
13 13 2 :

['wabt::Var::set_name(std::__1::basic_string_view >)', 'std::__1::basic_string , std::__1::allocator >::operator std::__1::basic_string_view >[abi:v180000]() const']

13 13 wabt::Var::operator=(wabt::Var&&) call site: 00000 /src/wabt/src/ir.cc:607
13 13 2 :

['wabt::Var::set_name(std::__1::basic_string_view >)', 'std::__1::basic_string , std::__1::allocator >::operator std::__1::basic_string_view >[abi:v180000]() const']

13 13 wabt::Var::operator=(wabt::Varconst&) call site: 00000 /src/wabt/src/ir.cc:617
0 31 3 :

['std::__1::unique_ptr >::~unique_ptr[abi:v180000]()', '_ZNSt3__110unique_ptrIN4wabt4ExprENS_14default_deleteIS2_EEEC2B7v180000INS1_16CodeMetadataExprENS3_IS7_EEvvEEONS0_IT_T0_EE', 'wabt::(anonymous namespace)::BinaryReaderIR::AppendExpr(std::__1::unique_ptr >)']

0 31 wabt::(anonymousnamespace)::BinaryReaderIR::OnOpcode(wabt::Opcode) call site: 00000 /src/wabt/src/binary-reader-ir.cc:796
0 10 7 :

['wabt::Binding::Binding(unsigned int)', 'std::__1::vector >::operator[][abi:v180000](unsigned long)', 'wabt::(anonymous namespace)::BinaryReaderIR::GetUniqueName(wabt::BindingHash*, std::__1::basic_string , std::__1::allocator > const&)', 'std::__1::basic_string , std::__1::allocator >::~basic_string()', 'std::__1::__hash_map_iterator , std::__1::allocator >, wabt::Binding>, void*>*> > std::__1::unordered_multimap , std::__1::allocator >, wabt::Binding, std::__1::hash , std::__1::allocator > >, std::__1::equal_to , std::__1::allocator > >, std::__1::allocator , std::__1::allocator > const, wabt::Binding> > >::emplace[abi:v180000] , std::__1::allocator >&, wabt::Binding>(std::__1::basic_string , std::__1::allocator >&, wabt::Binding&&)', 'std::__1::basic_string , std::__1::allocator >::operator=(std::__1::basic_string , std::__1::allocator > const&)', 'wabt::(anonymous namespace)::MakeDollarName(std::__1::basic_string_view >)']

0 12 wabt::(anonymousnamespace)::BinaryReaderIR::OnTagSymbol(unsignedint,unsignedint,std::__1::basic_string_view >,unsignedint) call site: 00000 /src/wabt/src/binary-reader-ir.cc:1759
0 7 1 :

['wabt::(anonymous namespace)::BinaryReaderIR::PrintError(char const*, ...)']

0 9 wabt::(anonymousnamespace)::BinaryReaderIR::OnFunctionBodyCount(unsignedint) call site: 00000 /src/wabt/src/binary-reader-ir.cc:766
0 7 1 :

['wabt::(anonymous namespace)::BinaryReaderIR::PrintError(char const*, ...)']

0 9 wabt::(anonymousnamespace)::BinaryReaderIR::GetLabelAt(wabt::(anonymousnamespace)::LabelNode**,unsignedint) call site: 00000 /src/wabt/src/binary-reader-ir.cc:437

Runtime coverage analysis

Covered functions
561
Functions that are reachable but not covered
52
Reachable functions
317
Percentage of reachable functions covered
83.6%
NB: The sum of covered functions and functions that are reachable but not covered need not be equal to Reachable functions . This is because the reachability analysis is an approximation and thus at runtime some functions may be covered that are not included in the reachability analysis. This is a limitation of our static analysis capabilities.
Warning: The number of covered functions are larger than the number of reachable functions. This means that there are more functions covered at runtime than are extracted using static analysis. This is likely a result of the static analysis component failing to extract the right call graph or the coverage runtime being compiled with sanitizers in code that the static analysis has not analysed. This can happen if lto/gold is not used in all places that coverage instrumentation is used.
Function name source code lines source lines hit percentage hit

Files reached

filename functions hit
/src/wasm2wat_fuzzer.cc 1
/src/wabt/include/wabt/binary-reader.h 4
/src/wabt/include/wabt/feature.h 1
/src/wabt/include/wabt/ir.h 3
/src/wabt/include/wabt/common.h 5
/src/wabt/include/wabt/intrusive-list.h 1
/src/wabt/include/wabt/binding-hash.h 1
/src/wabt/src/binary-reader-ir.cc 5
/src/wabt/include/wabt/binary-reader-nop.h 2
/src/wabt/src/binary-reader.cc 74
/src/wabt/src/binary-reader-logging.cc 1
/src/wabt/include/wabt/error.h 3
/src/wabt/include/wabt/result.h 6
/src/wabt/src/leb128.cc 5
/src/wabt/src/binary.cc 2
/src/wabt/src/utf8.cc 2
/src/wabt/include/wabt/feature.def 15
/src/wabt/include/wabt/type.h 7
/src/wabt/include/wabt/opcode.h 11
/src/wabt/src/opcode.cc 3
/src/wabt/include/wabt/string-format.h 1
/src/wabt/include/wabt/binary-reader-logging.h 1

Fuzzer: read_binary_ir_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 0 121 7.73%
gold [1:9] 0 0.0%
yellow [10:29] 19 1.21%
greenyellow [30:49] 22 1.40%
lawngreen 50+ 1403 89.6%
All colors 1565 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
139 139 1 :

['wabt::(anonymous namespace)::BinaryReader::ReadNameSection(unsigned long)']

139 179 wabt::(anonymousnamespace)::BinaryReader::ReadCustomSection(unsignedint,unsignedlong) call site: 00000 /src/wabt/src/binary-reader.cc:2410
13 13 2 :

['wabt::Var::set_name(std::__1::basic_string_view >)', 'std::__1::basic_string , std::__1::allocator >::operator std::__1::basic_string_view >[abi:v180000]() const']

13 13 wabt::Var::operator=(wabt::Var&&) call site: 00000 /src/wabt/src/ir.cc:607
13 13 2 :

['wabt::Var::set_name(std::__1::basic_string_view >)', 'std::__1::basic_string , std::__1::allocator >::operator std::__1::basic_string_view >[abi:v180000]() const']

13 13 wabt::Var::operator=(wabt::Varconst&) call site: 00000 /src/wabt/src/ir.cc:617
0 7 1 :

['wabt::(anonymous namespace)::BinaryReaderIR::PrintError(char const*, ...)']

0 9 wabt::(anonymousnamespace)::BinaryReaderIR::OnFuncType(unsignedint,unsignedint,wabt::Type*,unsignedint,wabt::Type*) call site: 00000 /src/wabt/src/binary-reader-ir.cc:523
0 7 1 :

['wabt::(anonymous namespace)::BinaryReaderIR::PrintError(char const*, ...)']

0 9 wabt::(anonymousnamespace)::BinaryReaderIR::GetLabelAt(wabt::(anonymousnamespace)::LabelNode**,unsignedint) call site: 00000 /src/wabt/src/binary-reader-ir.cc:437
0 7 1 :

['wabt::(anonymous namespace)::BinaryReaderIR::PrintError(char const*, ...)']

0 9 wabt::(anonymousnamespace)::BinaryReaderIR::PopLabel() call site: 00000 /src/wabt/src/binary-reader-ir.cc:427
0 0 None 2 5426 wabt::(anonymousnamespace)::BinaryReader::ReadSections(wabt::(anonymousnamespace)::BinaryReader::ReadSectionsOptionsconst&) call site: 00000 /src/wabt/src/binary-reader.cc:2868
0 0 None 2 5426 wabt::(anonymousnamespace)::BinaryReader::ReadSections(wabt::(anonymousnamespace)::BinaryReader::ReadSectionsOptionsconst&) call site: 00000 /src/wabt/src/binary-reader.cc:2910
0 0 None 2 5426 wabt::(anonymousnamespace)::BinaryReader::ReadSections(wabt::(anonymousnamespace)::BinaryReader::ReadSectionsOptionsconst&) call site: 00000 /src/wabt/src/binary-reader.cc:2985
0 0 None 0 10267 wabt::(anonymousnamespace)::BinaryReader::ReadInstructions(unsignedlong,charconst*) call site: 00000 /src/wabt/src/binary-reader.cc:904
0 0 None 0 10267 wabt::(anonymousnamespace)::BinaryReader::ReadInstructions(unsignedlong,charconst*) call site: 00000 /src/wabt/src/binary-reader.cc:928
0 0 None 0 1313 wabt::(anonymousnamespace)::BinaryReader::ReadCodeSection(unsignedlong) call site: 00000 /src/wabt/src/binary-reader.cc:2797

Runtime coverage analysis

Covered functions
688
Functions that are reachable but not covered
36
Reachable functions
391
Percentage of reachable functions covered
90.79%
NB: The sum of covered functions and functions that are reachable but not covered need not be equal to Reachable functions . This is because the reachability analysis is an approximation and thus at runtime some functions may be covered that are not included in the reachability analysis. This is a limitation of our static analysis capabilities.
Warning: The number of covered functions are larger than the number of reachable functions. This means that there are more functions covered at runtime than are extracted using static analysis. This is likely a result of the static analysis component failing to extract the right call graph or the coverage runtime being compiled with sanitizers in code that the static analysis has not analysed. This can happen if lto/gold is not used in all places that coverage instrumentation is used.
Function name source code lines source lines hit percentage hit

Files reached

filename functions hit
/src/read_binary_ir_fuzzer.cc 1
/src/wabt/include/wabt/ir.h 3
/src/wabt/include/wabt/common.h 5
/src/wabt/include/wabt/intrusive-list.h 1
/src/wabt/include/wabt/binding-hash.h 1
/src/wabt/include/wabt/feature.h 1
/src/wabt/include/wabt/feature.def 33
/src/wabt/include/wabt/binary-reader.h 4
/src/wabt/src/binary-reader-ir.cc 5
/src/wabt/include/wabt/binary-reader-nop.h 2
/src/wabt/src/binary-reader.cc 74
/src/wabt/src/binary-reader-logging.cc 1
/src/wabt/include/wabt/error.h 3
/src/wabt/include/wabt/result.h 6
/src/wabt/src/leb128.cc 5
/src/wabt/src/binary.cc 2
/src/wabt/src/utf8.cc 2
/src/wabt/include/wabt/type.h 7
/src/wabt/include/wabt/opcode.h 11
/src/wabt/src/opcode.cc 3
/src/wabt/include/wabt/string-format.h 1
/src/wabt/include/wabt/binary-reader-logging.h 1

Fuzzer: wasm_objdump_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 81 5.10%
gold [1:9] 0 0.0%
yellow [10:29] 3 0.18%
greenyellow [30:49] 4 0.25%
lawngreen 50+ 1498 94.4%
All colors 1586 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
37 78 5 :

['std::__1::vector >::operator[][abi:v180000](unsigned long)', 'std::__1::unique_ptr >::operator->[abi:v180000]() const', 'wabt::Stream::Writef(char const*, ...)', 'std::__1::vector >::size[abi:v180000]() const', 'wabt::(anonymous namespace)::BinaryReaderObjdumpBase::PrintRelocation(wabt::Reloc const&, unsigned long) const']

37 82 wabt::(anonymousnamespace)::BinaryReaderObjdump::EndModule() call site: 00000 /src/wabt/./src/binary-reader-objdump.cc:1376
2 2 1 :

['abort']

2 2 wabt::(anonymousnamespace)::BinaryReaderObjdump::EndInitExpr() call site: 00000 /src/wabt/./src/binary-reader-objdump.cc:1869
0 82 1 :

['wabt::(anonymous namespace)::BinaryReader::ReadU32Leb128(unsigned int*, char const*)']

0 96 wabt::(anonymousnamespace)::BinaryReader::ReadMemory(wabt::Limits*) call site: 00000 /src/wabt/src/binary-reader.cc:614
0 51 1 :

['wabt::Stream::WriteMemoryDump(void const*, unsigned long, unsigned long, wabt::PrintChars, char const*, char const*)']

0 51 wabt::Stream::WriteDataAt(unsignedlong,voidconst*,unsignedlong,charconst*,wabt::PrintChars) call site: 00000 /src/wabt/src/stream.cc:47
0 41 2 :

['std::__1::unique_ptr >::operator->[abi:v180000]() const', 'wabt::Stream::Writef(char const*, ...)']

0 103 wabt::(anonymousnamespace)::BinaryReaderObjdumpDisassemble::OnOpcode(wabt::Opcode) call site: 00000 /src/wabt/./src/binary-reader-objdump.cc:585
0 41 1 :

['wabt::(anonymous namespace)::BinaryReader::ReadU32Leb128(unsigned int*, char const*)']

0 41 wabt::(anonymousnamespace)::BinaryReader::ReadAddress(unsignedlong*,unsignedint,charconst*) call site: 00000 /src/wabt/src/binary-reader.cc:657
0 24 2 :

['wabt::Opcode::FromCode(unsigned int)', 'wabt::Opcode::GetName() const']

0 26 wabt::(anonymousnamespace)::BinaryReaderObjdumpDisassemble::OnOpcode(wabt::Opcode) call site: 00000 /src/wabt/./src/binary-reader-objdump.cc:595
0 0 None 37 84 wabt::(anonymousnamespace)::BinaryReaderObjdump::EndModule() call site: 00000 /src/wabt/./src/binary-reader-objdump.cc:1371
0 0 None 37 41 wabt::(anonymousnamespace)::BinaryReaderObjdump::OnDataSegmentData(unsignedint,voidconst*,unsignedlong) call site: 00000 /src/wabt/./src/binary-reader-objdump.cc:2018
0 0 None 2 5426 wabt::(anonymousnamespace)::BinaryReader::ReadSections(wabt::(anonymousnamespace)::BinaryReader::ReadSectionsOptionsconst&) call site: 00000 /src/wabt/src/binary-reader.cc:2868
0 0 None 2 5426 wabt::(anonymousnamespace)::BinaryReader::ReadSections(wabt::(anonymousnamespace)::BinaryReader::ReadSectionsOptionsconst&) call site: 00000 /src/wabt/src/binary-reader.cc:2910
0 0 None 2 5426 wabt::(anonymousnamespace)::BinaryReader::ReadSections(wabt::(anonymousnamespace)::BinaryReader::ReadSectionsOptionsconst&) call site: 00000 /src/wabt/src/binary-reader.cc:2985

Runtime coverage analysis

Covered functions
591
Functions that are reachable but not covered
42
Reachable functions
403
Percentage of reachable functions covered
89.58%
NB: The sum of covered functions and functions that are reachable but not covered need not be equal to Reachable functions . This is because the reachability analysis is an approximation and thus at runtime some functions may be covered that are not included in the reachability analysis. This is a limitation of our static analysis capabilities.
Warning: The number of covered functions are larger than the number of reachable functions. This means that there are more functions covered at runtime than are extracted using static analysis. This is likely a result of the static analysis component failing to extract the right call graph or the coverage runtime being compiled with sanitizers in code that the static analysis has not analysed. This can happen if lto/gold is not used in all places that coverage instrumentation is used.
Function name source code lines source lines hit percentage hit

Files reached

filename functions hit
/src/wasm_objdump_fuzzer.cc 1
/src/wabt/include/wabt/binary-reader-objdump.h 3
/src/wabt/./src/binary-reader-objdump.cc 10
/src/wabt/include/wabt/feature.h 2
/src/wabt/include/wabt/feature.def 33
/src/wabt/include/wabt/binary-reader.h 4
/src/wabt/include/wabt/binary-reader-nop.h 2
/src/wabt/include/wabt/opcode.h 11
/src/wabt/src/stream.cc 4
/src/wabt/include/wabt/result.h 6
/src/wabt/include/wabt/common.h 5
/src/wabt/src/binary-reader.cc 74
/src/wabt/src/binary-reader-logging.cc 1
/src/wabt/include/wabt/error.h 3
/src/wabt/src/leb128.cc 5
/src/wabt/src/binary.cc 2
/src/wabt/src/utf8.cc 2
/src/wabt/include/wabt/type.h 7
/src/wabt/src/opcode.cc 3
/src/wabt/include/wabt/string-format.h 1
/src/wabt/include/wabt/binary-reader-logging.h 1

Fuzzer: wat2wasm_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 1923 39.5%
gold [1:9] 0 0.0%
yellow [10:29] 2 0.04%
greenyellow [30:49] 1 0.02%
lawngreen 50+ 2936 60.3%
All colors 4862 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
432 432 5 :

['std::__1::__unique_if ::__unique_single std::__1::make_unique[abi:v180000] , std::__1::allocator >&>(std::__1::basic_string , std::__1::allocator >&)', 'wabt::WastParser::ParseFieldList(std::__1::vector >*)', 'std::__1::unique_ptr >::~unique_ptr[abi:v180000]()', 'std::__1::unique_ptr >& std::__1::unique_ptr >::operator=[abi:v180000] , void, void>(std::__1::unique_ptr >&&)', 'std::__1::unique_ptr >::operator->[abi:v180000]() const']

434 1102 wabt::WastParser::ParseTypeModuleField(wabt::Module*) call site: 00000 /src/wabt/src/wast-parser.cc:1531
427 1093 13 :

['wabt::WastParser::Error(wabt::Location, char const*, ...)', 'std::__1::unique_ptr >::unique_ptr[abi:v180000](std::__1::unique_ptr >&&)', 'std::__1::unique_ptr >::operator->[abi:v180000]() const', 'wabt::WastParser::ParseField(wabt::Field*)', 'wabt::Features::gc_enabled() const', 'wabt::Failed(wabt::Result)', 'wabt::Module::AppendField(std::__1::unique_ptr >)', 'std::__1::unique_ptr >::~unique_ptr[abi:v180000]()', 'std::__1::__unique_if ::__unique_single std::__1::make_unique[abi:v180000] , std::__1::allocator >&>(std::__1::basic_string , std::__1::allocator >&)', 'std::__1::unique_ptr >& std::__1::unique_ptr >::operator=[abi:v180000] , void, void>(std::__1::unique_ptr >&&)', 'wabt::Result::Result(wabt::Result::Enum)', 'std::__1::unique_ptr >::operator->[abi:v180000]() const', 'wabt::WastParser::Expect(wabt::TokenType)']

427 1093 wabt::WastParser::ParseTypeModuleField(wabt::Module*) call site: 00000 /src/wabt/src/wast-parser.cc:1539
16 20 3 :

['wabt::intrusive_list ::iterator::operator*() const', 'std::__1::unique_ptr >::release[abi:v180000]()', 'wabt::intrusive_list ::iterator::operator->() const']

16 22 wabt::intrusive_list ::insert(wabt::intrusive_list ::iterator,std::__1::unique_ptr >) call site: 00000 /src/wabt/include/wabt/intrusive-list.h:518
16 16 1 :

['wabt::Const::set_f32(wabt::ExpectedNan)']

16 18 wabt::WastParser::ParseF32(wabt::Const*,wabt::WastParser::ConstType) call site: 00000 /src/wabt/src/wast-parser.cc:2718
16 16 1 :

['wabt::Const::set_f64(wabt::ExpectedNan)']

16 18 wabt::WastParser::ParseF64(wabt::Const*,wabt::WastParser::ConstType) call site: 00000 /src/wabt/src/wast-parser.cc:2738
12 12 5 :

['std::__1::unique_ptr >::get[abi:v180000]() const', 'std::__1::unique_ptr > wabt::cast (std::__1::unique_ptr >&&)', 'std::__1::unique_ptr >::operator->[abi:v180000]() const', 'bool wabt::isa (wabt::Command const*)', 'std::__1::unique_ptr >::~unique_ptr[abi:v180000]()']

22 349 wabt::WastParser::ParseModule(std::__1::unique_ptr >*) call site: 00000 /src/wabt/src/wast-parser.cc:1170
4 7 6 :

['std::__1::unordered_map , std::__1::allocator >, std::__1::hash , std::__1::equal_to , std::__1::allocator , std::__1::allocator > > > >::cend[abi:v180000]() const', 'std::__1::__hash_map_const_iterator , std::__1::allocator > >, void*>*> >::operator->[abi:v180000]() const', 'wabt::BindingHash::FindIndex(std::__1::basic_string , std::__1::allocator > const&) const', 'std::__1::unordered_map , std::__1::allocator >, std::__1::hash , std::__1::equal_to , std::__1::allocator , std::__1::allocator > > > >::find[abi:v180000](unsigned int const&) const', 'wabt::Type::Type(wabt::Type::Enum, unsigned int)', 'std::__1::operator!=[abi:v180000](std::__1::__hash_map_const_iterator , std::__1::allocator > >, void*>*> > const&, std::__1::__hash_map_const_iterator , std::__1::allocator > >, void*>*> > const&)']

4 7 wabt::(anonymousnamespace)::ResolveTypeName(wabt::Moduleconst&,wabt::Type&,unsignedint,std::__1::unordered_map ,std::__1::allocator >,std::__1::hash ,std::__1::equal_to ,std::__1::allocator ,std::__1::allocator >>>>const&) call site: 00000 /src/wabt/src/wast-parser.cc:319
2 4 2 :

['wabt::Opcode::DecodeInvalidOpcode(wabt::Opcode::Enum, unsigned char*, unsigned int*)', 'wabt::Opcode::PrefixCode(unsigned char, unsigned int)']

2 4 wabt::Opcode::GetInfo()const call site: 00000 /src/wabt/src/opcode.cc:42
0 1733 1 :

['wabt::WastParser::ParseOffsetExpr(wabt::intrusive_list *)']

0 5154 wabt::WastParser::ParseElemModuleField(wabt::Module*) call site: 00000 /src/wabt/src/wast-parser.cc:1396
0 1604 2 :

['wabt::WastParser::PeekMatch(wabt::TokenType, unsigned long)', 'wabt::WastParser::ParseMemidx(wabt::Location, wabt::Var*)']

0 2767 wabt::Resultwabt::WastParser::ParseSIMDLoadStoreInstr (wabt::Location,wabt::Token,std::__1::unique_ptr >*) call site: 00000 /src/wabt/src/wast-parser.cc:2102
0 1604 2 :

['wabt::WastParser::PeekMatch(wabt::TokenType, unsigned long)', 'wabt::WastParser::ParseMemidx(wabt::Location, wabt::Var*)']

0 2767 wabt::Resultwabt::WastParser::ParseSIMDLoadStoreInstr (wabt::Location,wabt::Token,std::__1::unique_ptr >*) call site: 00000 /src/wabt/src/wast-parser.cc:2102
0 1318 3 :

['wabt::WastParser::Expect(wabt::TokenType)', 'wabt::Failed(wabt::Result)', 'wabt::WastParser::ParseVar(wabt::Var*)']

0 1328 wabt::WastParser::ParseValueType(wabt::Var*) call site: 00000 /src/wabt/src/wast-parser.cc:918

Runtime coverage analysis

Covered functions
989
Functions that are reachable but not covered
384
Reachable functions
1902
Percentage of reachable functions covered
79.81%
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/wat2wasm_fuzzer.cc 1
/src/wabt/src/wast-lexer.cc 28
/src/wabt/include/wabt/feature.h 1
/src/wabt/include/wabt/wast-parser.h 3
/src/wabt/src/wast-parser.cc 146
/src/wabt/include/wabt/common.h 20
/src/wabt/src/token.cc 8
/src/wabt/include/wabt/token.h 16
/src/wabt/include/wabt/wast-lexer.h 5
/src/wabt/src/literal.cc 20
/src/wabt/include/wabt/result.h 7
/src/wabt/build/src/lexer-keywords.txt 6
/src/wabt/include/wabt/type.h 8
/src/wabt/include/wabt/opcode.h 4
/src/wabt/include/wabt/feature.def 16
/usr/local/bin/../include/c++/v1/optional 2
/src/wabt/src/utf8.cc 2
/src/wabt/include/wabt/ir.h 94
/src/wabt/include/wabt/literal.h 7
/src/wabt/src/ir.cc 26
/src/wabt/include/wabt/intrusive-list.h 23
/src/wabt/include/wabt/string-format.h 1
/src/wabt/build/include/wabt/config.h 1
/src/wabt/src/opcode.cc 3
/src/wabt/include/wabt/binding-hash.h 5
/src/wabt/include/wabt/cast.h 94
/src/wabt/src/binding-hash.cc 5
/src/wabt/include/wabt/expr-visitor.h 4
/src/wabt/src/expr-visitor.cc 11
/src/wabt/src/resolve-names.cc 19
/src/wabt/include/wabt/binary-reader.h 4
/src/wabt/src/binary-reader-ir.cc 5
/src/wabt/include/wabt/binary-reader-nop.h 2
/src/wabt/src/binary-reader.cc 74
/src/wabt/src/binary-reader-logging.cc 1
/src/wabt/include/wabt/error.h 3
/src/wabt/src/leb128.cc 5
/src/wabt/src/binary.cc 2
/src/wabt/include/wabt/binary-reader-logging.h 1

Fuzzer: read_binary_interp_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 0 254 16.1%
gold [1:9] 156 9.94%
yellow [10:29] 111 7.07%
greenyellow [30:49] 46 2.93%
lawngreen 50+ 1002 63.8%
All colors 1569 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
139 139 1 :

['wabt::(anonymous namespace)::BinaryReader::ReadNameSection(unsigned long)']

139 179 wabt::(anonymousnamespace)::BinaryReader::ReadCustomSection(unsignedint,unsignedlong) call site: 00000 /src/wabt/src/binary-reader.cc:2410
13 13 2 :

['wabt::Var::set_name(std::__1::basic_string_view >)', 'std::__1::basic_string , std::__1::allocator >::operator std::__1::basic_string_view >[abi:v180000]() const']

13 13 wabt::Var::operator=(wabt::Var&&) call site: 00000 /src/wabt/src/ir.cc:607
13 13 2 :

['wabt::Var::set_name(std::__1::basic_string_view >)', 'std::__1::basic_string , std::__1::allocator >::operator std::__1::basic_string_view >[abi:v180000]() const']

13 13 wabt::Var::operator=(wabt::Varconst&) call site: 00000 /src/wabt/src/ir.cc:617
7 7 1 :

['wabt::interp::(anonymous namespace)::BinaryReaderInterp::PrintError(char const*, ...)']

7 9 wabt::interp::(anonymousnamespace)::BinaryReaderInterp::OnOpcode(wabt::Opcode) call site: 00000 /src/wabt/src/interp/binary-reader-interp.cc:881
0 53 4 :

['wabt::SharedValidator::PrintError(wabt::Location const&, char const*, ...)', 'std::__1::basic_string , std::__1::allocator >::~basic_string()', 'std::__1::basic_string , std::__1::allocator >::c_str[abi:v180000]() const', 'wabt::Type::GetName() const']

0 55 wabt::SharedValidator::CheckType(wabt::Locationconst&,wabt::Type,wabt::Type,charconst*) call site: 00000 /src/wabt/src/shared-validator.cc:180
0 24 1 :

['wabt::(anonymous namespace)::BinaryReader::PrintError(char const*, ...)']

0 26 wabt::Resultwabt::(anonymousnamespace)::BinaryReader::ReadT (unsignedint*,charconst*,charconst*) call site: 00000 /src/wabt/src/binary-reader.cc:278
0 24 1 :

['wabt::(anonymous namespace)::BinaryReader::PrintError(char const*, ...)']

0 26 wabt::Resultwabt::(anonymousnamespace)::BinaryReader::ReadT (unsignedlong*,charconst*,charconst*) call site: 00000 /src/wabt/src/binary-reader.cc:278
0 24 1 :

['wabt::(anonymous namespace)::BinaryReader::PrintError(char const*, ...)']

0 26 wabt::Resultwabt::(anonymousnamespace)::BinaryReader::ReadT (v128*,charconst*,charconst*) call site: 00000 /src/wabt/src/binary-reader.cc:278
0 14 2 :

['wabt::SharedValidator::PrintError(wabt::Location const&, char const*, ...)', 'wabt::Result::operator|=(wabt::Result)']

0 14 wabt::SharedValidator::OnGlobalGet(wabt::Locationconst&,wabt::Var) call site: 00000 /src/wabt/src/shared-validator.cc:823
0 13 2 :

['wabt::SharedValidator::PrintError(wabt::Location const&, char const*, ...)', 'wabt::Var::index() const']

0 13 wabt::SharedValidator::CheckFuncTypeIndex(wabt::Var,wabt::SharedValidator::FuncType*) call site: 00000 /src/wabt/src/shared-validator.cc:356
0 8 4 :

['wabt::interp::Istream::end() const', 'std::__1::vector >::size[abi:v180000]() const', 'std::__1::vector >::operator[][abi:v180000](unsigned long)', 'wabt::interp::(anonymous namespace)::BinaryReaderInterp::TopLabel()']

0 22 wabt::interp::(anonymousnamespace)::BinaryReaderInterp::OnEndExpr() call site: 00000 /src/wabt/src/interp/binary-reader-interp.cc:1052
0 7 1 :

['wabt::SharedValidator::PrintError(wabt::Location const&, char const*, ...)']

0 14 wabt::SharedValidator::OnSelect(wabt::Locationconst&,unsignedint,wabt::Type*) call site: 00000 /src/wabt/src/shared-validator.cc:1049

Runtime coverage analysis

Covered functions
663
Functions that are reachable but not covered
42
Reachable functions
393
Percentage of reachable functions covered
89.31%
NB: The sum of covered functions and functions that are reachable but not covered need not be equal to Reachable functions . This is because the reachability analysis is an approximation and thus at runtime some functions may be covered that are not included in the reachability analysis. This is a limitation of our static analysis capabilities.
Warning: The number of covered functions are larger than the number of reachable functions. This means that there are more functions covered at runtime than are extracted using static analysis. This is likely a result of the static analysis component failing to extract the right call graph or the coverage runtime being compiled with sanitizers in code that the static analysis has not analysed. This can happen if lto/gold is not used in all places that coverage instrumentation is used.
Function name source code lines source lines hit percentage hit

Files reached

filename functions hit
/src/read_binary_interp_fuzzer.cc 1
/src/wabt/include/wabt/feature.h 1
/src/wabt/include/wabt/interp/interp.h 2
/src/wabt/include/wabt/interp/istream.h 1
/src/wabt/include/wabt/feature.def 33
/src/wabt/include/wabt/binary-reader.h 4
/src/wabt/src/interp/binary-reader-interp.cc 5
/src/wabt/include/wabt/binary-reader-nop.h 2
/src/wabt/include/wabt/shared-validator.h 2
/src/wabt/src/shared-validator.cc 1
/src/wabt/include/wabt/type-checker.h 3
/src/wabt/include/wabt/common.h 4
/src/wabt/src/binary-reader.cc 74
/src/wabt/src/binary-reader-logging.cc 1
/src/wabt/include/wabt/error.h 3
/src/wabt/include/wabt/result.h 6
/src/wabt/src/leb128.cc 5
/src/wabt/src/binary.cc 2
/src/wabt/src/utf8.cc 2
/src/wabt/include/wabt/type.h 7
/src/wabt/include/wabt/opcode.h 11
/src/wabt/src/opcode.cc 3
/src/wabt/include/wabt/string-format.h 1
/src/wabt/include/wabt/binary-reader-logging.h 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
wabt::interp::DefinedFunc::DoCall(wabt::interp::Thread&,std::__1::vector >const&,std::__1::vector >&,wabt::interp::RefPtr *) /src/wabt/src/interp/interp.cc 5 ['N/A', 'N/A', 'N/A', 'N/A', 'N/A'] 12 0 114 15 5 1787 0 2743 2697
wabt::ParseWastScript(wabt::WastLexer*,std::__1::unique_ptr >*,std::__1::vector >*,wabt::WastParseOptions*) /src/wabt/src/wast-parser.cc 4 ['N/A', 'N/A', 'N/A', 'N/A'] 17 0 97 20 4 1994 0 4325 204
wabt::interp::(anonymousnamespace)::BinaryReaderInterp::OnSimdLaneOpExpr(wabt::Opcode,unsignedlong) /src/wabt/src/interp/binary-reader-interp.cc 3 ['N/A', 'int', 'size_t'] 10 0 59 8 3 106 0 221 164
wabt::interp::Instance::Instantiate(wabt::interp::Store&,wabt::interp::Ref,std::__1::vector >const&,wabt::interp::RefPtr *) /src/wabt/src/interp/interp.cc 5 ['N/A', 'N/A', 'size_t', 'N/A', 'N/A'] 7 0 1295 130 28 249 0 301 142
wabt::(anonymousnamespace)::BinaryReaderObjdump::OnDataSegmentData(unsignedint,voidconst*,unsignedlong) /src/wabt/./src/binary-reader-objdump.cc 4 ['N/A', 'int', 'N/A', 'size_t'] 8 0 200 23 9 87 0 191 105
wabt::interp::(anonymousnamespace)::BinaryReaderInterp::OnReturnCallExpr(unsignedint) /src/wabt/src/interp/binary-reader-interp.cc 2 ['N/A', 'int'] 9 0 161 23 7 161 0 247 86
wabt::(anonymousnamespace)::BinaryReaderIR::OnNameEntry(wabt::NameSectionSubsection,unsignedint,std::__1::basic_string_view >) /src/wabt/src/binary-reader-ir.cc 5 ['N/A', 'int', 'int', 'N/A', 'size_t'] 3 0 165 18 19 28 0 62 54

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

Functions statically reachable by fuzzers
49.0%
2039 / 4164
Cyclomatic complexity statically reachable by fuzzers
59.0%
7724 / 13010

All functions overview

If you implement fuzzers for these functions, the status of all functions in the project will be:

Func name Functions filename Args Function call depth Reached by Fuzzers Fuzzers runtime hit Func lines hit % I Count BB Count Cyclomatic complexity Functions reached Reached by functions Accumulated cyclomatic complexity Undiscovered complexity

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/wasm2wat_fuzzer.cc

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=['wabt::(anonymous namespace)::BinaryReader::ReadCount(unsigned int*, char const*)', 'wabt::(anonymous namespace)::BinaryReader::ReadInstructions(unsigned long, char const*)', 'wabt::(anonymous namespace)::BinaryReader::ReadTypeSection(unsigned long)', 'wabt::(anonymous namespace)::BinaryReader::ReadCustomSection(unsigned int, unsigned long)', 'wabt::(anonymous namespace)::BinaryReader::ReadCustomSection(unsigned int, unsigned long)', 'wabt::(anonymous namespace)::BinaryReader::ReadInstructions(unsigned long, char const*)', 'wabt::(anonymous namespace)::BinaryReader::ReadInstructions(unsigned long, char const*)', 'wabt::(anonymous namespace)::BinaryReader::ReadSections(wabt::(anonymous namespace)::BinaryReader::ReadSectionsOptions const&)', 'wabt::(anonymous namespace)::BinaryReader::ReadInstructions(unsigned long, char const*)', 'wabt::(anonymous namespace)::BinaryReader::ReadImportSection(unsigned long)']

/src/read_binary_ir_fuzzer.cc

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=['wabt::(anonymous namespace)::BinaryReader::ReadCount(unsigned int*, char const*)', 'wabt::(anonymous namespace)::BinaryReader::ReadCustomSection(unsigned int, unsigned long)', 'LLVMFuzzerTestOneInput', 'wabt::(anonymous namespace)::BinaryReader::ReadInstructions(unsigned long, char const*)', 'wabt::(anonymous namespace)::BinaryReader::ReadInstructions(unsigned long, char const*)', 'wabt::ReadBinaryIr(char const*, void const*, unsigned long, wabt::ReadBinaryOptions const&, std::__1::vector >*, wabt::Module*)', 'wabt::ReadBinary(void const*, unsigned long, wabt::BinaryReaderDelegate*, wabt::ReadBinaryOptions const&)', 'wabt::(anonymous namespace)::BinaryReader::PrintError(char const*, ...)', 'wabt::(anonymous namespace)::BinaryReader::ReadElemSection(unsigned long)']

/src/wasm_objdump_fuzzer.cc

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=['wabt::Features::EnableAll()', 'wabt::(anonymous namespace)::BinaryReader::ReadInstructions(unsigned long, char const*)', 'wabt::ReadBinaryObjdump(unsigned char const*, unsigned long, wabt::ObjdumpOptions*, wabt::ObjdumpState*)', 'wabt::ReadBinary(void const*, unsigned long, wabt::BinaryReaderDelegate*, wabt::ReadBinaryOptions const&)', 'wabt::ReadBinaryObjdump(unsigned char const*, unsigned long, wabt::ObjdumpOptions*, wabt::ObjdumpState*)', 'wabt::(anonymous namespace)::BinaryReader::ReadTypeSection(unsigned long)', 'wabt::(anonymous namespace)::BinaryReader::ReadMemory(wabt::Limits*)', 'wabt::(anonymous namespace)::BinaryReader::ReadInstructions(unsigned long, char const*)', 'wabt::(anonymous namespace)::BinaryReader::ReadInstructions(unsigned long, char const*)', 'wabt::(anonymous namespace)::BinaryReader::ReadInstructions(unsigned long, char const*)']

/src/wat2wasm_fuzzer.cc

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=['wabt::WastParser::ParseModuleCommand(wabt::Script*, std::__1::unique_ptr >*)', 'wabt::WastParser::ParseTypeModuleField(wabt::Module*)', 'wabt::(anonymous namespace)::Perfect_Hash::InWordSet(char const*, unsigned long)', 'wabt::WastParser::ParseQuotedText(std::__1::basic_string, std::__1::allocator >*, bool)', 'wabt::(anonymous namespace)::Perfect_Hash::InWordSet(char const*, unsigned long)', 'wabt::(anonymous namespace)::Perfect_Hash::InWordSet(char const*, unsigned long)', 'wabt::(anonymous namespace)::Perfect_Hash::InWordSet(char const*, unsigned long)', 'wabt::WastParser::ParseValueType(wabt::Var*)', 'wabt::WastParser::ParseInlineImport(wabt::Import*)', 'wabt::WastParser::ParseMemidx(wabt::Location, wabt::Var*)']

/src/read_binary_interp_fuzzer.cc

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=['wabt::(anonymous namespace)::BinaryReader::ReadCount(unsigned int*, char const*)', 'wabt::(anonymous namespace)::BinaryReader::ReadInstructions(unsigned long, char const*)', 'wabt::(anonymous namespace)::BinaryReader::ReadCustomSection(unsigned int, unsigned long)', 'wabt::(anonymous namespace)::BinaryReader::ReadInstructions(unsigned long, char const*)', 'wabt::(anonymous namespace)::BinaryReader::ReadInstructions(unsigned long, char const*)', 'wabt::(anonymous namespace)::BinaryReader::ReadInstructions(unsigned long, char const*)', 'wabt::(anonymous namespace)::BinaryReader::ReadTypeSection(unsigned long)', 'wabt::(anonymous namespace)::BinaryReader::ReadInstructions(unsigned long, char const*)', 'wabt::(anonymous namespace)::BinaryReader::ReadInstructions(unsigned long, char const*)', 'wabt::(anonymous namespace)::BinaryReader::ReadInstructions(unsigned long, char 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
wabt::Module::AppendField(std::__1::unique_ptr >) 37 7 18.91% ['wat2wasm_fuzzer']
wabt::WastParser::Peek(unsignedlong) 41 15 36.58% ['wat2wasm_fuzzer']
wabt::WastParser::ParseTagModuleField(wabt::Module*) 34 6 17.64% ['wat2wasm_fuzzer']
wabt::WastParser::ParseModuleCommand(wabt::Script*,std::__1::unique_ptr >*) 69 16 23.18% ['wat2wasm_fuzzer']
wabt::WastParser::ParseScriptModule(std::__1::unique_ptr >*) 47 25 53.19% ['wat2wasm_fuzzer']

Files and Directories in report

This section shows which files and directories are considered in this report. The main reason for showing this is fuzz introspector may include more code in the reasoning than is desired. This section helps identify if too many files/directories are included, e.g. third party code, which may be irrelevant for the threat model. In the event too much is included, fuzz introspector supports a configuration file that can exclude data from the report. See the following link for more information on how to create a config file: link

Files in report

Source file Reached by Covered by
[] []
/src/read_binary_ir_fuzzer.cc ['read_binary_ir_fuzzer'] ['read_binary_ir_fuzzer']
/src/wat2wasm_fuzzer.cc ['wat2wasm_fuzzer'] ['wat2wasm_fuzzer']
/src/wabt/include/wabt/opcode.h ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wasm_objdump_fuzzer', 'wat2wasm_fuzzer', 'read_binary_interp_fuzzer'] ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wasm_objdump_fuzzer', 'wat2wasm_fuzzer', 'read_binary_interp_fuzzer']
/src/wabt/include/wabt/feature.def ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wasm_objdump_fuzzer', 'wat2wasm_fuzzer', 'read_binary_interp_fuzzer'] ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wasm_objdump_fuzzer', 'wat2wasm_fuzzer', 'read_binary_interp_fuzzer']
/src/wabt/include/wabt/wast-parser.h ['wat2wasm_fuzzer'] ['wat2wasm_fuzzer']
/src/wabt/src/common.cc [] []
/src/wabt/src/interp/binary-reader-interp.cc ['read_binary_interp_fuzzer'] ['read_binary_interp_fuzzer']
/src/read_binary_interp_fuzzer.cc ['read_binary_interp_fuzzer'] ['read_binary_interp_fuzzer']
/src/wabt/include/wabt/binding-hash.h ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wat2wasm_fuzzer'] ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wat2wasm_fuzzer']
/src/wabt/src/resolve-names.cc ['wat2wasm_fuzzer'] ['wat2wasm_fuzzer']
/src/wabt/src/config.cc [] []
/src/wabt/include/wabt/interp/interp-inl.h [] []
/src/wabt/src/binding-hash.cc ['wat2wasm_fuzzer'] ['wat2wasm_fuzzer']
/src/wasm2wat_fuzzer.cc ['wasm2wat_fuzzer'] ['wasm2wat_fuzzer']
/src/wabt/include/wabt/token.h ['wat2wasm_fuzzer'] ['wat2wasm_fuzzer']
/src/wabt/include/wabt/string-util.h [] []
/src/wabt/src/expr-visitor.cc ['wat2wasm_fuzzer'] ['wat2wasm_fuzzer']
/src/wabt/include/wabt/feature.h ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wasm_objdump_fuzzer', 'wat2wasm_fuzzer', 'read_binary_interp_fuzzer'] ['wasm_objdump_fuzzer']
/src/wabt/src/interp/interp.cc [] []
/src/wabt/src/utf8.cc ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wasm_objdump_fuzzer', 'wat2wasm_fuzzer', 'read_binary_interp_fuzzer'] ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wasm_objdump_fuzzer', 'wat2wasm_fuzzer', 'read_binary_interp_fuzzer']
/src/wabt/src/stream.cc ['wasm_objdump_fuzzer'] ['wasm_objdump_fuzzer']
/src/wabt/include/wabt/interp/interp.h ['read_binary_interp_fuzzer'] ['read_binary_interp_fuzzer']
/src/wabt/include/wabt/type-checker.h ['read_binary_interp_fuzzer'] ['read_binary_interp_fuzzer']
/usr/local/bin/../include/c++/v1/stdlib.h [] []
/src/wabt/src/ir.cc ['wat2wasm_fuzzer'] ['wat2wasm_fuzzer']
/src/wabt/include/wabt/binary-reader-objdump.h ['wasm_objdump_fuzzer'] []
/src/wabt/src/opcode.cc ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wasm_objdump_fuzzer', 'wat2wasm_fuzzer', 'read_binary_interp_fuzzer'] ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wasm_objdump_fuzzer', 'wat2wasm_fuzzer', 'read_binary_interp_fuzzer']
/src/wabt/include/wabt/shared-validator.h ['read_binary_interp_fuzzer'] ['read_binary_interp_fuzzer']
/src/wasm_objdump_fuzzer.cc ['wasm_objdump_fuzzer'] ['wasm_objdump_fuzzer']
/src/wabt/src/type-checker.cc [] []
/src/wabt/include/wabt/binary-reader-logging.h ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wasm_objdump_fuzzer', 'wat2wasm_fuzzer', 'read_binary_interp_fuzzer'] []
/src/wabt/include/wabt/binary-reader.h ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wasm_objdump_fuzzer', 'wat2wasm_fuzzer', 'read_binary_interp_fuzzer'] ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wasm_objdump_fuzzer', 'read_binary_interp_fuzzer']
/src/wabt/include/wabt/common.h ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wasm_objdump_fuzzer', 'wat2wasm_fuzzer', 'read_binary_interp_fuzzer'] ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wasm_objdump_fuzzer', 'wat2wasm_fuzzer', 'read_binary_interp_fuzzer']
/src/wabt/src/binary.cc ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wasm_objdump_fuzzer', 'wat2wasm_fuzzer', 'read_binary_interp_fuzzer'] ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wasm_objdump_fuzzer', 'read_binary_interp_fuzzer']
/src/wabt/include/wabt/wast-lexer.h ['wat2wasm_fuzzer'] ['wat2wasm_fuzzer']
/src/wabt/include/wabt/interp/interp-math.h [] []
/src/wabt/src/interp/istream.cc [] []
/src/wabt/src/shared-validator.cc ['read_binary_interp_fuzzer'] ['read_binary_interp_fuzzer']
/src/wabt/src/literal.cc ['wat2wasm_fuzzer'] ['wat2wasm_fuzzer']
/src/wabt/include/wabt/range.h [] []
/usr/local/bin/../include/c++/v1/stdexcept [] []
/src/wabt/include/wabt/option-parser.h [] []
/src/wabt/include/wabt/lexer-source.h [] []
/src/wabt/include/wabt/ir.h ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wat2wasm_fuzzer'] ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wat2wasm_fuzzer']
/src/wabt/src/wast-lexer.cc ['wat2wasm_fuzzer'] ['wat2wasm_fuzzer']
/src/wabt/src/binary-reader-logging.cc ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wasm_objdump_fuzzer', 'wat2wasm_fuzzer', 'read_binary_interp_fuzzer'] ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wasm_objdump_fuzzer', 'read_binary_interp_fuzzer']
/src/wabt/include/wabt/cast.h ['wat2wasm_fuzzer'] ['wat2wasm_fuzzer']
/src/wabt/build/src/lexer-keywords.txt ['wat2wasm_fuzzer'] ['wat2wasm_fuzzer']
/src/wabt/include/wabt/literal.h ['wat2wasm_fuzzer'] ['wat2wasm_fuzzer']
/src/wabt/src/lexer-source.cc [] []
/src/wabt/src/option-parser.cc [] []
/src/wabt/include/wabt/expr-visitor.h ['wat2wasm_fuzzer'] ['wat2wasm_fuzzer']
/src/wabt/./src/binary-reader-objdump.cc ['wasm_objdump_fuzzer'] []
/src/wabt/include/wabt/string-format.h ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wasm_objdump_fuzzer', 'wat2wasm_fuzzer', 'read_binary_interp_fuzzer'] ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wasm_objdump_fuzzer', 'wat2wasm_fuzzer', 'read_binary_interp_fuzzer']
/src/wabt/src/token.cc ['wat2wasm_fuzzer'] ['wat2wasm_fuzzer']
/src/wabt/include/wabt/error.h ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wasm_objdump_fuzzer', 'wat2wasm_fuzzer', 'read_binary_interp_fuzzer'] ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wasm_objdump_fuzzer', 'wat2wasm_fuzzer', 'read_binary_interp_fuzzer']
/src/wabt/include/wabt/result.h ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wasm_objdump_fuzzer', 'wat2wasm_fuzzer', 'read_binary_interp_fuzzer'] ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wasm_objdump_fuzzer', 'wat2wasm_fuzzer', 'read_binary_interp_fuzzer']
/src/wabt/src/leb128.cc ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wasm_objdump_fuzzer', 'wat2wasm_fuzzer', 'read_binary_interp_fuzzer'] ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wasm_objdump_fuzzer', 'read_binary_interp_fuzzer']
/src/wabt/include/wabt/binary-reader-nop.h ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wasm_objdump_fuzzer', 'wat2wasm_fuzzer', 'read_binary_interp_fuzzer'] ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wasm_objdump_fuzzer', 'read_binary_interp_fuzzer']
/src/wabt/src/feature.cc [] []
/src/wabt/src/filenames.cc [] []
/usr/local/bin/../include/c++/v1/optional ['wat2wasm_fuzzer'] []
/src/wabt/include/wabt/type.h ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wasm_objdump_fuzzer', 'wat2wasm_fuzzer', 'read_binary_interp_fuzzer'] ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wasm_objdump_fuzzer', 'wat2wasm_fuzzer', 'read_binary_interp_fuzzer']
/src/wabt/include/wabt/intrusive-list.h ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wat2wasm_fuzzer'] ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wat2wasm_fuzzer']
/src/wabt/src/binary-reader-ir.cc ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wat2wasm_fuzzer'] ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer']
/src/wabt/include/wabt/stream.h [] []
/src/wabt/build/include/wabt/config.h ['wat2wasm_fuzzer'] ['wat2wasm_fuzzer']
/src/wabt/src/wast-parser.cc ['wat2wasm_fuzzer'] ['wat2wasm_fuzzer']
/src/wabt/src/binary-reader.cc ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wasm_objdump_fuzzer', 'wat2wasm_fuzzer', 'read_binary_interp_fuzzer'] ['wasm2wat_fuzzer', 'read_binary_ir_fuzzer', 'wasm_objdump_fuzzer', 'read_binary_interp_fuzzer']
/src/wabt/include/wabt/interp/istream.h ['read_binary_interp_fuzzer'] []

Directories in report

Directory
/src/wabt/build/src/
/src/wabt/include/wabt/
/src/wabt/src/interp/
/src/wabt/build/include/wabt/
/src/wabt/src/
/src/wabt/./src/
/src/
/usr/local/bin/../include/c++/v1/
/src/wabt/include/wabt/interp/

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
wasm2wat_fuzzer fuzzerLogFile-0-ZBP22qziyH.data fuzzerLogFile-0-ZBP22qziyH.data.yaml wasm2wat_fuzzer.covreport
read_binary_ir_fuzzer fuzzerLogFile-0-kcPSDXFtKR.data fuzzerLogFile-0-kcPSDXFtKR.data.yaml read_binary_ir_fuzzer.covreport
wasm_objdump_fuzzer fuzzerLogFile-0-NrBTH7DNRz.data fuzzerLogFile-0-NrBTH7DNRz.data.yaml wasm_objdump_fuzzer.covreport
wat2wasm_fuzzer fuzzerLogFile-0-WO9XA5H4y1.data fuzzerLogFile-0-WO9XA5H4y1.data.yaml wat2wasm_fuzzer.covreport
read_binary_interp_fuzzer fuzzerLogFile-0-OZdcaqPd1G.data fuzzerLogFile-0-OZdcaqPd1G.data.yaml read_binary_interp_fuzzer.covreport