1 // Copyright (c) 2020 André Perez Maselco
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License");
4 // you may not use this file except in compliance with the License.
5 // You may obtain a copy of the License at
6 //
7 // http://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS,
11 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12 // See the License for the specific language governing permissions and
13 // limitations under the License.
14
15 #include "source/fuzz/fuzzer_pass_toggle_access_chain_instruction.h"
16
17 #include "source/fuzz/fuzzer_util.h"
18 #include "source/fuzz/instruction_descriptor.h"
19 #include "source/fuzz/transformation_toggle_access_chain_instruction.h"
20
21 namespace spvtools {
22 namespace fuzz {
23
FuzzerPassToggleAccessChainInstruction(opt::IRContext * ir_context,TransformationContext * transformation_context,FuzzerContext * fuzzer_context,protobufs::TransformationSequence * transformations,bool ignore_inapplicable_transformations)24 FuzzerPassToggleAccessChainInstruction::FuzzerPassToggleAccessChainInstruction(
25 opt::IRContext* ir_context, TransformationContext* transformation_context,
26 FuzzerContext* fuzzer_context,
27 protobufs::TransformationSequence* transformations,
28 bool ignore_inapplicable_transformations)
29 : FuzzerPass(ir_context, transformation_context, fuzzer_context,
30 transformations, ignore_inapplicable_transformations) {}
31
Apply()32 void FuzzerPassToggleAccessChainInstruction::Apply() {
33 auto context = GetIRContext();
34 // Iterates over the module's instructions and checks whether it is
35 // OpAccessChain or OpInBoundsAccessChain. In this case, the transformation is
36 // probabilistically applied.
37 context->module()->ForEachInst([this,
38 context](opt::Instruction* instruction) {
39 SpvOp opcode = instruction->opcode();
40 if ((opcode == SpvOpAccessChain || opcode == SpvOpInBoundsAccessChain) &&
41 GetFuzzerContext()->ChoosePercentage(
42 GetFuzzerContext()->GetChanceOfTogglingAccessChainInstruction())) {
43 auto instructionDescriptor =
44 MakeInstructionDescriptor(context, instruction);
45 auto transformation =
46 TransformationToggleAccessChainInstruction(instructionDescriptor);
47 ApplyTransformation(transformation);
48 }
49 });
50 }
51
52 } // namespace fuzz
53 } // namespace spvtools
54