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https://github.com/KhronosGroup/SPIRV-Tools
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90 lines
3.3 KiB
C++
90 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_replace_parameter_with_global.h"
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#include <numeric>
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#include <vector>
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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/transformation_replace_parameter_with_global.h"
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namespace spvtools {
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namespace fuzz {
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FuzzerPassReplaceParameterWithGlobal::FuzzerPassReplaceParameterWithGlobal(
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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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FuzzerPassReplaceParameterWithGlobal::~FuzzerPassReplaceParameterWithGlobal() =
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default;
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void FuzzerPassReplaceParameterWithGlobal::Apply() {
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for (const auto& function : *GetIRContext()->module()) {
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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 (!GetFuzzerContext()->ChoosePercentage(
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GetFuzzerContext()->GetChanceOfReplacingParametersWithGlobals())) {
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continue;
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}
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auto params =
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fuzzerutil::GetParameters(GetIRContext(), function.result_id());
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// Make sure at least one parameter can be replaced. Also checks that the
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// function has at least one parameter.
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if (std::none_of(params.begin(), params.end(),
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[this](const opt::Instruction* param) {
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return TransformationReplaceParameterWithGlobal::
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IsParameterTypeSupported(GetIRContext(),
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param->type_id());
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})) {
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continue;
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}
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// Select id of a parameter to replace.
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const opt::Instruction* replaced_param;
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uint32_t param_type_id;
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do {
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replaced_param = GetFuzzerContext()->RemoveAtRandomIndex(¶ms);
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param_type_id = replaced_param->type_id();
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assert(param_type_id && "Parameter has invalid type");
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} while (
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!TransformationReplaceParameterWithGlobal::IsParameterTypeSupported(
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GetIRContext(), param_type_id));
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assert(replaced_param && "Unable to find a parameter to replace");
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// Make sure type id for the global variable exists in the module.
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FindOrCreatePointerType(replaced_param->type_id(), SpvStorageClassPrivate);
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// Make sure initializer for the global variable exists in the module.
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FindOrCreateZeroConstant(replaced_param->type_id(), false);
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ApplyTransformation(TransformationReplaceParameterWithGlobal(
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GetFuzzerContext()->GetFreshId(), replaced_param->result_id(),
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GetFuzzerContext()->GetFreshId()));
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}
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}
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} // namespace fuzz
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} // namespace spvtools
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