71 строка
3.0 KiB
C++
71 строка
3.0 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_function_controls.h"
|
|
|
|
#include "source/fuzz/transformation_set_function_control.h"
|
|
|
|
namespace spvtools {
|
|
namespace fuzz {
|
|
|
|
FuzzerPassAdjustFunctionControls::FuzzerPassAdjustFunctionControls(
|
|
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 FuzzerPassAdjustFunctionControls::Apply() {
|
|
// Consider every function in the module.
|
|
for (auto& function : *GetIRContext()->module()) {
|
|
// Randomly decide whether to adjust this function's controls.
|
|
if (GetFuzzerContext()->ChoosePercentage(
|
|
GetFuzzerContext()->GetChanceOfAdjustingFunctionControl())) {
|
|
// Grab the function control mask for the function in its present form.
|
|
uint32_t existing_function_control_mask =
|
|
function.DefInst().GetSingleWordInOperand(0);
|
|
|
|
// For the new mask, we first randomly select one of three basic masks:
|
|
// None, Inline or DontInline. These are always valid (and are mutually
|
|
// exclusive).
|
|
std::vector<spv::FunctionControlMask> basic_function_control_masks = {
|
|
spv::FunctionControlMask::MaskNone, spv::FunctionControlMask::Inline,
|
|
spv::FunctionControlMask::DontInline};
|
|
uint32_t new_function_control_mask =
|
|
uint32_t(basic_function_control_masks[GetFuzzerContext()->RandomIndex(
|
|
basic_function_control_masks)]);
|
|
|
|
// We now consider the Pure and Const mask bits. If these are already
|
|
// set on the function then it's OK to keep them, but also interesting
|
|
// to consider dropping them, so we decide randomly in each case.
|
|
for (auto mask_bit :
|
|
{spv::FunctionControlMask::Pure, spv::FunctionControlMask::Const}) {
|
|
if ((existing_function_control_mask & uint32_t(mask_bit)) &&
|
|
GetFuzzerContext()->ChooseEven()) {
|
|
new_function_control_mask |= uint32_t(mask_bit);
|
|
}
|
|
}
|
|
|
|
// Create and add a transformation.
|
|
TransformationSetFunctionControl transformation(
|
|
function.DefInst().result_id(), new_function_control_mask);
|
|
ApplyTransformation(transformation);
|
|
}
|
|
}
|
|
}
|
|
|
|
} // namespace fuzz
|
|
} // namespace spvtools
|