mirror of
https://github.com/KhronosGroup/SPIRV-Tools
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94 lines
3.3 KiB
C++
94 lines
3.3 KiB
C++
// Copyright (c) 2020 Vasyl Teliman
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#include "source/fuzz/fuzzer_pass_add_parameters.h"
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#include "source/fuzz/fuzzer_context.h"
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#include "source/fuzz/fuzzer_util.h"
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#include "source/fuzz/instruction_descriptor.h"
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#include "source/fuzz/transformation_add_parameter.h"
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namespace spvtools {
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namespace fuzz {
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FuzzerPassAddParameters::FuzzerPassAddParameters(
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opt::IRContext* ir_context, TransformationContext* transformation_context,
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FuzzerContext* fuzzer_context,
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protobufs::TransformationSequence* transformations)
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: FuzzerPass(ir_context, transformation_context, fuzzer_context,
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transformations) {}
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FuzzerPassAddParameters::~FuzzerPassAddParameters() = default;
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void FuzzerPassAddParameters::Apply() {
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// Compute type candidates for the new parameter.
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std::vector<uint32_t> type_candidates;
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for (const auto& type_inst : GetIRContext()->module()->GetTypes()) {
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const auto* type =
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GetIRContext()->get_type_mgr()->GetType(type_inst->result_id());
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assert(type && "Type instruction is not registered in the type manager");
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if (TransformationAddParameter::IsParameterTypeSupported(*type)) {
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type_candidates.push_back(type_inst->result_id());
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}
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}
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if (type_candidates.empty()) {
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// The module contains no suitable types to use in new parameters.
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return;
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}
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// Iterate over all functions in the module.
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for (const auto& function : *GetIRContext()->module()) {
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// Skip all entry-point functions - we don't want to change those.
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if (fuzzerutil::FunctionIsEntryPoint(GetIRContext(),
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function.result_id())) {
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continue;
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}
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if (GetNumberOfParameters(function) >=
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GetFuzzerContext()->GetMaximumNumberOfFunctionParameters()) {
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continue;
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}
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if (!GetFuzzerContext()->ChoosePercentage(
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GetFuzzerContext()->GetChanceOfAddingParameters())) {
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continue;
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}
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auto num_new_parameters =
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GetFuzzerContext()->GetRandomNumberOfNewParameters(
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GetNumberOfParameters(function));
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for (uint32_t i = 0; i < num_new_parameters; ++i) {
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ApplyTransformation(TransformationAddParameter(
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function.result_id(), GetFuzzerContext()->GetFreshId(),
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FindOrCreateZeroConstant(
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type_candidates[GetFuzzerContext()->RandomIndex(
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type_candidates)]),
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GetFuzzerContext()->GetFreshId()));
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}
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}
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}
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uint32_t FuzzerPassAddParameters::GetNumberOfParameters(
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const opt::Function& function) const {
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const auto* type = GetIRContext()->get_type_mgr()->GetType(
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function.DefInst().GetSingleWordInOperand(1));
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assert(type && type->AsFunction());
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return static_cast<uint32_t>(type->AsFunction()->param_types().size());
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}
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} // namespace fuzz
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} // namespace spvtools
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