mirror of
https://github.com/KhronosGroup/SPIRV-Tools
synced 2024-11-22 11:40:05 +00:00
d35a78db57
Fixes #4960 * Switches to using enum classes with an underlying type to avoid undefined behaviour
73 lines
2.8 KiB
C++
73 lines
2.8 KiB
C++
// Copyright (c) 2019 Google LLC
|
|
//
|
|
// 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_selection_controls.h"
|
|
|
|
#include "source/fuzz/transformation_set_selection_control.h"
|
|
|
|
namespace spvtools {
|
|
namespace fuzz {
|
|
|
|
FuzzerPassAdjustSelectionControls::FuzzerPassAdjustSelectionControls(
|
|
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 FuzzerPassAdjustSelectionControls::Apply() {
|
|
// Consider every merge instruction in the module (via looking through all
|
|
// functions and blocks).
|
|
for (auto& function : *GetIRContext()->module()) {
|
|
for (auto& block : function) {
|
|
if (auto merge_inst = block.GetMergeInst()) {
|
|
// Ignore the instruction if it is not a selection merge.
|
|
if (merge_inst->opcode() != spv::Op::OpSelectionMerge) {
|
|
continue;
|
|
}
|
|
|
|
// Choose randomly whether to change the selection control for this
|
|
// instruction.
|
|
if (!GetFuzzerContext()->ChoosePercentage(
|
|
GetFuzzerContext()->GetChanceOfAdjustingSelectionControl())) {
|
|
continue;
|
|
}
|
|
|
|
// The choices to change the selection control to are the set of valid
|
|
// controls, minus the current control.
|
|
std::vector<uint32_t> choices;
|
|
for (auto control : {spv::SelectionControlMask::MaskNone,
|
|
spv::SelectionControlMask::Flatten,
|
|
spv::SelectionControlMask::DontFlatten}) {
|
|
if (control ==
|
|
spv::SelectionControlMask(merge_inst->GetSingleWordOperand(1))) {
|
|
continue;
|
|
}
|
|
choices.push_back(uint32_t(control));
|
|
}
|
|
|
|
// Apply the transformation and add it to the output transformation
|
|
// sequence.
|
|
TransformationSetSelectionControl transformation(
|
|
block.id(), choices[GetFuzzerContext()->RandomIndex(choices)]);
|
|
ApplyTransformation(transformation);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
} // namespace fuzz
|
|
} // namespace spvtools
|