1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
|
// Copyright (c) 2020 André Perez Maselco
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include "source/fuzz/fuzzer_pass_adjust_branch_weights.h"
#include "source/fuzz/fuzzer_util.h"
#include "source/fuzz/instruction_descriptor.h"
#include "source/fuzz/transformation_adjust_branch_weights.h"
namespace spvtools {
namespace fuzz {
FuzzerPassAdjustBranchWeights::FuzzerPassAdjustBranchWeights(
opt::IRContext* ir_context, TransformationContext* transformation_context,
FuzzerContext* fuzzer_context,
protobufs::TransformationSequence* transformations,
bool ignore_inapplicable_transformations)
: FuzzerPass(ir_context, transformation_context, fuzzer_context,
transformations, ignore_inapplicable_transformations) {}
void FuzzerPassAdjustBranchWeights::Apply() {
// For all OpBranchConditional instructions,
// randomly applies the transformation.
GetIRContext()->module()->ForEachInst([this](opt::Instruction* instruction) {
if (instruction->opcode() == spv::Op::OpBranchConditional &&
GetFuzzerContext()->ChoosePercentage(
GetFuzzerContext()->GetChanceOfAdjustingBranchWeights())) {
ApplyTransformation(TransformationAdjustBranchWeights(
MakeInstructionDescriptor(GetIRContext(), instruction),
GetFuzzerContext()->GetRandomBranchWeights()));
}
});
}
} // namespace fuzz
} // namespace spvtools
|
