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

Fuzz blockers

The following nodes represent call sites where fuzz blockers occur.

Amount of callsites blocked Calltree index Parent function Callsite Largest blocked function
27 172 ValidateBlockEnd call site: 00172 ResolveBlockResults
8 212 UnwindBlockStack call site: 00212 PushBlockResults
7 63 NewCodePage call site: 00063 CompileBlock
6 79 Pop call site: 00079 PushBlockResults
6 103 EmitSlotOffset call site: 00103 Pop
6 134 EnsureCodePageNumLines call site: 00134 AcquireCodePageWithCapacity
6 149 Compile_Operator call site: 00149 PreserveRegisterIfOccupied
5 127 PreserveRegisterIfOccupied call site: 00127 EmitOp
5 206 CopyStackIndexToSlot call site: 00206 CopyStackSlotsR
5 230 m3_LoadModule call site: 00230 EvaluateExpression
3 294 v_validate_body call site: 00294 v_pop_expect
3 403 CompileFunction call site: 00403 PushAllocatedSlot

Fuzzer calltree

0 LLVMFuzzerTestOneInput [function] [call site] 00000
1 m3_NewEnvironment [function] [call site] 00001
2 m3_Malloc_Impl [function] [call site] 00002
3 calloc [call site] 00003
2 AllocFuncType [function] [call site] 00004
3 m3_Malloc_Impl [function] [call site] 00005
2 Environment_AddFuncType [function] [call site] 00006
3 AreFuncTypesEqual [function] [call site] 00007
4 memcmp [call site] 00008
3 m3_Free_Impl [function] [call site] 00009
2 m3_FreeEnvironment [function] [call site] 00010
3 Environment_Release [function] [call site] 00011
4 m3_Free_Impl [function] [call site] 00012
4 FreeCodePages [function] [call site] 00013
5 m3_Free_Impl [function] [call site] 00014
3 m3_Free_Impl [function] [call site] 00015
1 m3_NewRuntime [function] [call site] 00016
2 m3_Malloc_Impl [function] [call site] 00017
2 m3_ResetErrorInfo [function] [call site] 00018
2 m3_Malloc_Impl [function] [call site] 00019
2 m3_Free_Impl [function] [call site] 00020
1 m3_ParseModule [function] [call site] 00021
2 m3_Malloc_Impl [function] [call site] 00022
2 Read_u32 [function] [call site] 00023
2 Read_u32 [function] [call site] 00024
2 ReadLEB_u7 [function] [call site] 00025
3 ReadLebUnsigned [function] [call site] 00026
2 ReadLEB_u32 [function] [call site] 00027
3 ReadLebUnsigned [function] [call site] 00028
2 ParseModuleSection [function] [call site] 00029
2 m3_FreeModule [function] [call site] 00030
3 Module_FreeFunctions [function] [call site] 00031
4 Function_Release [function] [call site] 00032
5 m3_Free_Impl [function] [call site] 00033
5 FreeImportInfo [function] [call site] 00034
6 m3_Free_Impl [function] [call site] 00035
5 m3_Free_Impl [function] [call site] 00036
5 m3_Free_Impl [function] [call site] 00037
3 m3_Free_Impl [function] [call site] 00038
3 m3_Free_Impl [function] [call site] 00039
3 m3_Free_Impl [function] [call site] 00040
3 m3_Free_Impl [function] [call site] 00041
3 m3_Free_Impl [function] [call site] 00042
3 m3_Free_Impl [function] [call site] 00043
3 m3_Free_Impl [function] [call site] 00044
3 FreeImportInfo [function] [call site] 00045
3 m3_Free_Impl [function] [call site] 00046
3 m3_Free_Impl [function] [call site] 00047
3 FreeImportInfo [function] [call site] 00048
1 m3_LoadModule [function] [call site] 00049
2 InitMemory [function] [call site] 00050
3 ResizeMemory [function] [call site] 00051
4 m3_Realloc_Impl [function] [call site] 00052
5 realloc [call site] 00053
2 InitGlobals [function] [call site] 00054
3 EvaluateExpression [function] [call site] 00055
4 AcquireCodePage [function] [call site] 00056
5 AcquireCodePageWithCapacity [function] [call site] 00057
6 RemoveCodePageOfCapacity [function] [call site] 00058
7 NumFreeLines [function] [call site] 00059
6 Environment_AcquireCodePage [function] [call site] 00060
7 RemoveCodePageOfCapacity [function] [call site] 00061
6 NewCodePage [function] [call site] 00062
7 m3_Malloc_Impl [function] [call site] 00063
4 GetPagePC [function] [call site] 00064
4 CompileBlock [function] [call site] 00065
5 GetPagePC [function] [call site] 00066
5 GetFuncTypeNumParams [function] [call site] 00067
5 GetFuncTypeParamType [function] [call site] 00068
5 PopType [function] [call site] 00069
6 GetStackTopType [function] [call site] 00070
7 GetStackTypeFromTop [function] [call site] 00071
6 Pop [function] [call site] 00072
7 IsRegisterSlotAlias [function] [call site] 00073
7 IsFpRegisterSlotAlias [function] [call site] 00074
7 DeallocateRegister [function] [call site] 00075
7 DeallocateSlot [function] [call site] 00076
8 GetTypeNumSlots [function] [call site] 00077
9 Is64BitType [function] [call site] 00078
7 IsStackPolymorphic [function] [call site] 00079
5 IsStackPolymorphic [function] [call site] 00080
5 PushBlockResults [function] [call site] 00081
6 GetFuncTypeNumResults [function] [call site] 00082
6 GetFuncTypeResultType [function] [call site] 00083
6 IsFpType [function] [call site] 00084
6 PushRegister [function] [call site] 00085
7 IsFpType [function] [call site] 00086
7 Push [function] [call site] 00087
8 IsRegisterSlotAlias [function] [call site] 00088
8 IsFpRegisterSlotAlias [function] [call site] 00089
8 AllocateRegister [function] [call site] 00090
6 PushAllocatedSlot [function] [call site] 00091
7 _PushAllocatedSlotAndEmit [function] [call site] 00092
8 AllocateSlots [function] [call site] 00093
9 AllocateSlotsWithinRange [function] [call site] 00094
10 GetTypeNumSlots [function] [call site] 00095
10 AlignSlotToType [function] [call site] 00096
11 GetTypeNumSlots [function] [call site] 00097
10 MarkSlotsAllocated [function] [call site] 00098
11 MarkSlotAllocated [function] [call site] 00099
12 TouchSlot [function] [call site] 00100
8 Push [function] [call site] 00101
8 EmitSlotOffset [function] [call site] 00102
9 EmitWord32 [function] [call site] 00103
5 GetFuncTypeNumResults [function] [call site] 00104
5 Pop [function] [call site] 00105
5 GetFuncTypeParamType [function] [call site] 00106
5 GetSlotForStackIndex [function] [call site] 00107
5 Push [function] [call site] 00108
5 MarkSlotsAllocatedByType [function] [call site] 00109
6 GetTypeNumSlots [function] [call site] 00110
6 MarkSlotsAllocated [function] [call site] 00111
5 CompileBlockStatements [function] [call site] 00112
6 Read_opcode [function] [call site] 00113
6 GetOpInfo [function] [call site] 00114
6 m3Error [function] [call site] 00115
7 vsnprintf [call site] 00116
6 Compile_Operator [function] [call site] 00117
7 GetOpInfo [function] [call site] 00118
7 IsStackPolymorphic [function] [call site] 00119
7 GetStackTopType [function] [call site] 00120
7 GetStackTypeFromTop [function] [call site] 00121
7 GetStackTopType [function] [call site] 00122
7 IsFpType [function] [call site] 00123
7 IsIntType [function] [call site] 00124
7 PreserveRegisterIfOccupied [function] [call site] 00125
8 IsFpType [function] [call site] 00126
8 IsRegisterAllocated [function] [call site] 00127
8 GetRegisterStackIndex [function] [call site] 00128
8 DeallocateRegister [function] [call site] 00129
8 GetStackTypeFromBottom [function] [call site] 00130
8 AllocateSlots [function] [call site] 00131
8 EmitOp [function] [call site] 00132
9 EnsureCodePageNumLines [function] [call site] 00133
10 NumFreeLines [function] [call site] 00134
10 AcquireCodePageWithCapacity [function] [call site] 00135
10 EmitWord_impl [function] [call site] 00136
10 op_Branch [function] [call site] 00137
10 GetPagePC [function] [call site] 00138
10 EmitWord_impl [function] [call site] 00139
10 ReleaseCodePage [function] [call site] 00140
11 ReleaseCodePageNoTrack [function] [call site] 00141
12 NumFreeLines [function] [call site] 00142
12 PushCodePage [function] [call site] 00143
9 EmitWord_impl [function] [call site] 00144
8 EmitSlotOffset [function] [call site] 00145
7 IsStackTopInRegister [function] [call site] 00146
8 GetStackTopIndex [function] [call site] 00147
8 IsStackIndexInRegister [function] [call site] 00148
7 PreserveRegisterIfOccupied [function] [call site] 00149
7 IsStackTopInRegister [function] [call site] 00150
7 IsStackTopMinus1InRegister [function] [call site] 00151
8 GetStackTopIndex [function] [call site] 00152
8 IsStackIndexInRegister [function] [call site] 00153
7 IsStackTopMinus1InRegister [function] [call site] 00154
7 PreserveRegisterIfOccupied [function] [call site] 00155
7 EmitOp [function] [call site] 00156
7 EmitSlotNumOfStackTopAndPop [function] [call site] 00157
8 IsStackTopInSlot [function] [call site] 00158
9 IsStackTopInRegister [function] [call site] 00159
8 GetStackTopSlotNumber [function] [call site] 00160
9 GetStackTopIndex [function] [call site] 00161
8 EmitSlotOffset [function] [call site] 00162
8 Pop [function] [call site] 00163
7 EmitSlotNumOfStackTopAndPop [function] [call site] 00164
7 PushRegister [function] [call site] 00165
7 m3Error [function] [call site] 00166
5 ValidateBlockEnd [function] [call site] 00167
6 GetFuncTypeNumResults [function] [call site] 00168
6 IsStackPolymorphic [function] [call site] 00169
6 GetNumBlockValuesOnStack [function] [call site] 00170
6 GetFuncTypeResultType [function] [call site] 00171
6 GetStackTypeFromTop [function] [call site] 00172
5 IsStackPolymorphic [function] [call site] 00173
5 ResolveBlockResults [function] [call site] 00174
6 GetFuncTypeNumParams [function] [call site] 00175
6 GetFuncTypeNumResults [function] [call site] 00176
6 GetNumBlockValuesOnStack [function] [call site] 00177
6 GetStackTopIndex [function] [call site] 00178
6 GetStackTopType [function] [call site] 00179
6 IsFpType [function] [call site] 00180
6 CopyStackTopToRegister [function] [call site] 00181
7 IsStackTopInSlot [function] [call site] 00182
7 GetStackTopType [function] [call site] 00183
7 PreserveRegisterIfOccupied [function] [call site] 00184
7 EmitOp [function] [call site] 00185
7 GetStackTopSlotNumber [function] [call site] 00186
7 EmitSlotOffset [function] [call site] 00187
6 AlignSlotToType [function] [call site] 00188
6 CopyStackSlotsR [function] [call site] 00189
7 GetSlotForStackIndex [function] [call site] 00190
7 GetStackTypeFromBottom [function] [call site] 00191
7 GetTypeNumSlots [function] [call site] 00192
7 GetSlotForStackIndex [function] [call site] 00193
7 GetSlotForStackIndex [function] [call site] 00194
7 GetExtraSlotForStackIndex [function] [call site] 00195
8 GetSlotForStackIndex [function] [call site] 00196
8 GetStackTypeFromBottom [function] [call site] 00197
8 GetTypeNumSlots [function] [call site] 00198
7 CopyStackIndexToSlot [function] [call site] 00199
8 GetStackTypeFromBottom [function] [call site] 00200
8 IsStackIndexInRegister [function] [call site] 00201
8 Is64BitType [function] [call site] 00202
8 EmitOp [function] [call site] 00203
8 EmitSlotOffset [function] [call site] 00204
8 GetSlotForStackIndex [function] [call site] 00205
8 EmitSlotOffset [function] [call site] 00206
7 GetTypeNumSlots [function] [call site] 00207
7 TouchSlot [function] [call site] 00208
7 CopyStackIndexToSlot [function] [call site] 00209
7 CopyStackSlotsR [function] [call site] 00210
5 UnwindBlockStack [function] [call site] 00211
6 Pop [function] [call site] 00212
5 PushBlockResults [function] [call site] 00213
5 PatchBranches [function] [call site] 00214
6 GetPC [function] [call site] 00215
7 GetPagePC [function] [call site] 00216
4 RunCode [function] [call site] 00217
4 SizeOfType [function] [call site] 00218
4 ReleaseCodePage [function] [call site] 00219
4 Runtime_Release [function] [call site] 00220
5 ForEachModule [function] [call site] 00221
5 _FreeModule [function] [call site] 00222
6 m3_FreeModule [function] [call site] 00223
5 Environment_ReleaseCodePages [function] [call site] 00224
5 Environment_ReleaseCodePages [function] [call site] 00225
5 m3_Free_Impl [function] [call site] 00226
5 m3_Free_Impl [function] [call site] 00227
2 InitDataSegments [function] [call site] 00228
3 EvaluateExpression [function] [call site] 00229
2 InitElements [function] [call site] 00230
3 ReadLEB_u32 [function] [call site] 00231
3 EvaluateExpression [function] [call site] 00232
3 ReadLEB_u32 [function] [call site] 00233
3 m3_Realloc_Impl [function] [call site] 00234
3 ReadLEB_u32 [function] [call site] 00235
1 m3_FindFunction [function] [call site] 00236
2 ForEachModule [function] [call site] 00237
2 v_FindFunction [function] [call site] 00238
3 strcmp [call site] 00239
3 strcmp [call site] 00240
2 CompileFunction [function] [call site] 00241
3 ValidateFunction [function] [call site] 00242
4 ReadLEB_u32 [function] [call site] 00243
4 ReadLEB_u32 [function] [call site] 00244
4 ReadLEB_i7 [function] [call site] 00245
5 ReadLebSigned [function] [call site] 00246
4 NormalizeType [function] [call site] 00247
4 v_push_ctrl [function] [call site] 00248
4 v_validate_body [function] [call site] 00249
5 Read_opcode [function] [call site] 00250
5 v_unreachable [function] [call site] 00251
5 v_read_blocktype [function] [call site] 00252
6 ReadLebSigned [function] [call site] 00253
6 NormalizeType [function] [call site] 00254
5 v_pop_expect [function] [call site] 00255
6 v_pop [function] [call site] 00256
5 v_pop_expect [function] [call site] 00257
5 v_push_ctrl [function] [call site] 00258
5 v_push [function] [call site] 00259
5 v_pop_ctrl [function] [call site] 00260
6 v_pop_expect [function] [call site] 00261
5 v_push_ctrl [function] [call site] 00262
5 v_push [function] [call site] 00263
5 v_pop_ctrl [function] [call site] 00264
5 v_push [function] [call site] 00265
5 ReadLEB_u32 [function] [call site] 00266
5 v_pop_labels [function] [call site] 00267
6 v_label_n [function] [call site] 00268
6 v_label_t [function] [call site] 00269
6 v_pop_expect [function] [call site] 00270
5 v_unreachable [function] [call site] 00271
5 ReadLEB_u32 [function] [call site] 00272
5 v_pop_expect [function] [call site] 00273
5 v_pop_labels [function] [call site] 00274
5 v_push_labels [function] [call site] 00275
6 v_label_n [function] [call site] 00276
6 v_label_t [function] [call site] 00277
6 v_push [function] [call site] 00278
5 ReadLEB_u32 [function] [call site] 00279
5 ReadLEB_u32 [function] [call site] 00280
5 v_label_n [function] [call site] 00281
5 ReadLEB_u32 [function] [call site] 00282
5 v_label_n [function] [call site] 00283
5 v_label_t [function] [call site] 00284
5 v_pop_expect [function] [call site] 00285
5 v_pop_labels [function] [call site] 00286
5 v_unreachable [function] [call site] 00287
5 v_pop_expect [function] [call site] 00288
5 v_unreachable [function] [call site] 00289
5 ReadLEB_u32 [function] [call site] 00290
5 v_pop_expect [function] [call site] 00291
5 v_push [function] [call site] 00292
5 ReadLEB_u32 [function] [call site] 00293
5 ReadLEB_u32 [function] [call site] 00294
5 v_pop_expect [function] [call site] 00295
5 v_pop_expect [function] [call site] 00296
5 v_push [function] [call site] 00297
5 v_pop [function] [call site] 00298
5 v_pop_expect [function] [call site] 00299
5 v_pop [function] [call site] 00300
5 v_pop_expect [function] [call site] 00301
5 v_push [function] [call site] 00302
5 ReadLEB_u32 [function] [call site] 00303
5 v_push [function] [call site] 00304
5 ReadLEB_u32 [function] [call site] 00305
5 v_pop_expect [function] [call site] 00306
5 ReadLEB_u32 [function] [call site] 00307
5 v_pop_expect [function] [call site] 00308
5 v_push [function] [call site] 00309
5 ReadLEB_u32 [function] [call site] 00310
5 v_push [function] [call site] 00311
5 ReadLEB_u32 [function] [call site] 00312
5 v_pop_expect [function] [call site] 00313
5 ReadLEB_u32 [function] [call site] 00314
5 ReadLEB_u32 [function] [call site] 00315
5 v_max_align [function] [call site] 00316
5 v_has_memory [function] [call site] 00317
5 v_pop_expect [function] [call site] 00318
5 v_push [function] [call site] 00319
5 ReadLEB_u32 [function] [call site] 00320
5 ReadLEB_u32 [function] [call site] 00321
5 v_max_align [function] [call site] 00322
5 v_has_memory [function] [call site] 00323
5 v_pop_expect [function] [call site] 00324
5 v_pop_expect [function] [call site] 00325
5 ReadLEB_u32 [function] [call site] 00326
5 v_has_memory [function] [call site] 00327
5 v_push [function] [call site] 00328
5 ReadLEB_u32 [function] [call site] 00329
5 v_has_memory [function] [call site] 00330
5 v_pop_expect [function] [call site] 00331
5 v_push [function] [call site] 00332
5 ReadLEB_i32 [function] [call site] 00333
6 ReadLebSigned [function] [call site] 00334
5 v_push [function] [call site] 00335
5 ReadLEB_i64 [function] [call site] 00336
6 ReadLebSigned [function] [call site] 00337
5 v_push [function] [call site] 00338
5 v_push [function] [call site] 00339
5 v_push [function] [call site] 00340
5 v_testop [function] [call site] 00341
6 v_unop [function] [call site] 00342
7 v_pop_expect [function] [call site] 00343
7 v_push [function] [call site] 00344
5 v_relop [function] [call site] 00345
6 v_pop_expect [function] [call site] 00346
6 v_pop_expect [function] [call site] 00347
6 v_push [function] [call site] 00348
5 v_testop [function] [call site] 00349
5 v_relop [function] [call site] 00350
5 v_relop [function] [call site] 00351
5 v_relop [function] [call site] 00352
5 v_unop [function] [call site] 00353
5 v_binop [function] [call site] 00354
6 v_pop_expect [function] [call site] 00355
6 v_pop_expect [function] [call site] 00356
6 v_push [function] [call site] 00357
5 v_unop [function] [call site] 00358
5 v_binop [function] [call site] 00359
5 v_unop [function] [call site] 00360
5 v_binop [function] [call site] 00361
5 v_unop [function] [call site] 00362
5 v_binop [function] [call site] 00363
5 v_cvtop [function] [call site] 00364
6 v_unop [function] [call site] 00365
5 v_cvtop [function] [call site] 00366
5 v_cvtop [function] [call site] 00367
5 v_cvtop [function] [call site] 00368
5 v_cvtop [function] [call site] 00369
5 v_cvtop [function] [call site] 00370
5 v_cvtop [function] [call site] 00371
5 v_cvtop [function] [call site] 00372
5 v_cvtop [function] [call site] 00373
5 v_cvtop [function] [call site] 00374
5 v_cvtop [function] [call site] 00375
5 v_cvtop [function] [call site] 00376
5 v_cvtop [function] [call site] 00377
5 v_cvtop [function] [call site] 00378
5 v_cvtop [function] [call site] 00379
5 v_cvtop [function] [call site] 00380
5 v_unop [function] [call site] 00381
5 v_unop [function] [call site] 00382
5 ReadLEB_u32 [function] [call site] 00383
5 v_cvtop [function] [call site] 00384
5 v_cvtop [function] [call site] 00385
5 v_cvtop [function] [call site] 00386
5 v_cvtop [function] [call site] 00387
5 ReadLEB_u32 [function] [call site] 00388
5 ReadLEB_u32 [function] [call site] 00389
5 v_pop_expect [function] [call site] 00390
5 v_pop_expect [function] [call site] 00391
5 v_pop_expect [function] [call site] 00392
5 ReadLEB_u32 [function] [call site] 00393
5 v_pop_expect [function] [call site] 00394
5 v_pop_expect [function] [call site] 00395
5 v_pop_expect [function] [call site] 00396
3 ReadLEB_u32 [function] [call site] 00397
3 AcquireCompilationCodePage [function] [call site] 00398
4 AcquireCodePage [function] [call site] 00399
3 GetPagePC [function] [call site] 00400
3 GetFunctionNumReturns [function] [call site] 00401
3 GetFunctionNumArgs [function] [call site] 00402
3 MarkSlotAllocated [function] [call site] 00403
3 GetFunctionArgType [function] [call site] 00404
4 GetFunctionNumArgs [function] [call site] 00405
3 PushAllocatedSlot [function] [call site] 00406
3 CompileLocals [function] [call site] 00407
4 ReadLEB_u32 [function] [call site] 00408
4 ReadLEB_u32 [function] [call site] 00409
4 ReadLEB_i7 [function] [call site] 00410
4 NormalizeType [function] [call site] 00411
4 PushAllocatedSlot [function] [call site] 00412
3 GetMaxUsedSlotPlusOne [function] [call site] 00413
4 IsSlotAllocated [function] [call site] 00414
3 ReserveConstants [function] [call site] 00415
4 GetTypeNumSlots [function] [call site] 00416
4 AlignSlotToType [function] [call site] 00417
3 EmitOp [function] [call site] 00418
3 op_Entry [function] [call site] 00419
3 EmitPointer [function] [call site] 00420
4 GetPagePC [function] [call site] 00421
4 EmitWord_impl [function] [call site] 00422
3 CompileBlockStatements [function] [call site] 00423
3 m3_CopyMem [function] [call site] 00424
4 m3_Malloc_Impl [function] [call site] 00425
3 ReleaseCompilationCodePage [function] [call site] 00426
4 ReleaseCodePage [function] [call site] 00427
2 m3Error [function] [call site] 00428
1 m3_FreeModule [function] [call site] 00429
1 m3_FreeRuntime [function] [call site] 00430
2 m3_PrintProfilerInfo [function] [call site] 00431
2 Runtime_Release [function] [call site] 00432
2 m3_Free_Impl [function] [call site] 00433