1 // Copyright (c) 2020 Google LLC
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_replace_copy_memories_with_loads_stores.h"
16
17 #include "source/fuzz/fuzzer_util.h"
18 #include "source/fuzz/instruction_descriptor.h"
19 #include "source/fuzz/transformation_replace_copy_memory_with_load_store.h"
20
21 namespace spvtools {
22 namespace fuzz {
23
24 FuzzerPassReplaceCopyMemoriesWithLoadsStores::
FuzzerPassReplaceCopyMemoriesWithLoadsStores(opt::IRContext * ir_context,TransformationContext * transformation_context,FuzzerContext * fuzzer_context,protobufs::TransformationSequence * transformations,bool ignore_inapplicable_transformations)25 FuzzerPassReplaceCopyMemoriesWithLoadsStores(
26 opt::IRContext* ir_context,
27 TransformationContext* transformation_context,
28 FuzzerContext* fuzzer_context,
29 protobufs::TransformationSequence* transformations,
30 bool ignore_inapplicable_transformations)
31 : FuzzerPass(ir_context, transformation_context, fuzzer_context,
32 transformations, ignore_inapplicable_transformations) {}
33
Apply()34 void FuzzerPassReplaceCopyMemoriesWithLoadsStores::Apply() {
35 GetIRContext()->module()->ForEachInst([this](opt::Instruction* instruction) {
36 // Randomly decide whether to replace the OpCopyMemory.
37 if (!GetFuzzerContext()->ChoosePercentage(
38 GetFuzzerContext()
39 ->GetChanceOfReplacingCopyMemoryWithLoadStore())) {
40 return;
41 }
42
43 // The instruction must be OpCopyMemory.
44 if (instruction->opcode() != SpvOpCopyMemory) {
45 return;
46 }
47
48 // Apply the transformation replacing OpCopyMemory with OpLoad and OpStore.
49 ApplyTransformation(TransformationReplaceCopyMemoryWithLoadStore(
50 GetFuzzerContext()->GetFreshId(),
51 MakeInstructionDescriptor(GetIRContext(), instruction)));
52 });
53 }
54
55 } // namespace fuzz
56 } // namespace spvtools
57