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// 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_toggle_access_chain_instruction.h"
#include "source/fuzz/fuzzer_util.h"
#include "source/fuzz/instruction_descriptor.h"
#include "source/fuzz/transformation_toggle_access_chain_instruction.h"
namespace spvtools {
namespace fuzz {
FuzzerPassToggleAccessChainInstruction::FuzzerPassToggleAccessChainInstruction(
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 FuzzerPassToggleAccessChainInstruction::Apply() {
auto context = GetIRContext();
// Iterates over the module's instructions and checks whether it is
// OpAccessChain or OpInBoundsAccessChain. In this case, the transformation is
// probabilistically applied.
context->module()->ForEachInst([this,
context](opt::Instruction* instruction) {
spv::Op opcode = instruction->opcode();
if ((opcode == spv::Op::OpAccessChain ||
opcode == spv::Op::OpInBoundsAccessChain) &&
GetFuzzerContext()->ChoosePercentage(
GetFuzzerContext()->GetChanceOfTogglingAccessChainInstruction())) {
auto instructionDescriptor =
MakeInstructionDescriptor(context, instruction);
auto transformation =
TransformationToggleAccessChainInstruction(instructionDescriptor);
ApplyTransformation(transformation);
}
});
}
} // namespace fuzz
} // namespace spvtools
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