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// 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_context.h"
#include <cmath>
namespace spvtools {
namespace fuzz {
namespace {
// An offset between the module's id bound and the minimum fresh id.
//
// TODO(https://github.com/KhronosGroup/SPIRV-Tools/issues/2541): consider
// the case where the maximum id bound is reached.
const uint32_t kIdBoundGap = 100;
// Limits to help control the overall fuzzing process and rein in individual
// fuzzer passes.
const uint32_t kIdBoundLimit = 50000;
const uint32_t kTransformationLimit = 2000;
// Default <minimum, maximum> pairs of probabilities for applying various
// transformations. All values are percentages. Keep them in alphabetical order.
const std::pair<uint32_t, uint32_t>
kChanceOfAcceptingRepeatedPassRecommendation = {50, 80};
const std::pair<uint32_t, uint32_t> kChanceOfAddingAccessChain = {5, 50};
const std::pair<uint32_t, uint32_t> kChanceOfAddingAnotherPassToPassLoop = {50,
90};
const std::pair<uint32_t, uint32_t> kChanceOfAddingAnotherStructField = {20,
90};
const std::pair<uint32_t, uint32_t> kChanceOfAddingArrayOrStructType = {20, 90};
const std::pair<uint32_t, uint32_t> KChanceOfAddingAtomicLoad = {30, 90};
const std::pair<uint32_t, uint32_t> KChanceOfAddingAtomicStore = {20, 90};
const std::pair<uint32_t, uint32_t> kChanceOfAddingBitInstructionSynonym = {5,
20};
const std::pair<uint32_t, uint32_t>
kChanceOfAddingBothBranchesWhenReplacingOpSelect = {40, 60};
const std::pair<uint32_t, uint32_t> kChanceOfAddingCompositeExtract = {20, 50};
const std::pair<uint32_t, uint32_t> kChanceOfAddingCompositeInsert = {20, 50};
const std::pair<uint32_t, uint32_t> kChanceOfAddingCopyMemory = {20, 50};
const std::pair<uint32_t, uint32_t> kChanceOfAddingDeadBlock = {20, 90};
const std::pair<uint32_t, uint32_t> kChanceOfAddingDeadBreak = {5, 80};
const std::pair<uint32_t, uint32_t> kChanceOfAddingDeadContinue = {5, 80};
const std::pair<uint32_t, uint32_t> kChanceOfAddingEquationInstruction = {5,
90};
const std::pair<uint32_t, uint32_t> kChanceOfAddingGlobalVariable = {20, 90};
const std::pair<uint32_t, uint32_t> kChanceOfAddingImageSampleUnusedComponents =
{20, 90};
const std::pair<uint32_t, uint32_t> kChanceOfAddingLoad = {5, 50};
const std::pair<uint32_t, uint32_t> kChanceOfAddingLocalVariable = {20, 90};
const std::pair<uint32_t, uint32_t> kChanceOfAddingLoopPreheader = {20, 90};
const std::pair<uint32_t, uint32_t> kChanceOfAddingMatrixType = {20, 70};
const std::pair<uint32_t, uint32_t> kChanceOfAddingNoContractionDecoration = {
5, 70};
const std::pair<uint32_t, uint32_t> kChanceOfAddingOpPhiSynonym = {5, 70};
const std::pair<uint32_t, uint32_t> kChanceOfAddingParameters = {5, 70};
const std::pair<uint32_t, uint32_t> kChanceOfAddingRelaxedDecoration = {20, 90};
const std::pair<uint32_t, uint32_t> kChanceOfAddingStore = {5, 50};
const std::pair<uint32_t, uint32_t> kChanceOfAddingSynonyms = {20, 50};
const std::pair<uint32_t, uint32_t>
kChanceOfAddingTrueBranchWhenReplacingOpSelect = {40, 60};
const std::pair<uint32_t, uint32_t> kChanceOfAddingVectorType = {20, 70};
const std::pair<uint32_t, uint32_t> kChanceOfAddingVectorShuffle = {20, 70};
const std::pair<uint32_t, uint32_t> kChanceOfAdjustingBranchWeights = {20, 90};
const std::pair<uint32_t, uint32_t> kChanceOfAdjustingFunctionControl = {20,
70};
const std::pair<uint32_t, uint32_t> kChanceOfAdjustingLoopControl = {20, 90};
const std::pair<uint32_t, uint32_t> kChanceOfAdjustingMemoryOperandsMask = {20,
90};
const std::pair<uint32_t, uint32_t> kChanceOfAdjustingSelectionControl = {20,
90};
const std::pair<uint32_t, uint32_t> kChanceOfCallingFunction = {1, 10};
const std::pair<uint32_t, uint32_t> kChanceOfChoosingStructTypeVsArrayType = {
20, 80};
const std::pair<uint32_t, uint32_t> kChanceOfChoosingWorkgroupStorageClass = {
50, 50};
const std::pair<uint32_t, uint32_t> kChanceOfConstructingComposite = {20, 50};
const std::pair<uint32_t, uint32_t> kChanceOfCopyingObject = {20, 50};
const std::pair<uint32_t, uint32_t> kChanceOfCreatingIntSynonymsUsingLoops = {
5, 10};
const std::pair<uint32_t, uint32_t> kChanceOfDonatingAdditionalModule = {5, 50};
const std::pair<uint32_t, uint32_t> kChanceOfDuplicatingRegionWithSelection = {
20, 50};
const std::pair<uint32_t, uint32_t> kChanceOfExpandingVectorReduction = {20,
90};
const std::pair<uint32_t, uint32_t> kChanceOfFlatteningConditionalBranch = {45,
95};
const std::pair<uint32_t, uint32_t> kChanceOfGoingDeeperToExtractComposite = {
30, 70};
const std::pair<uint32_t, uint32_t> kChanceOfGoingDeeperToInsertInComposite = {
30, 70};
const std::pair<uint32_t, uint32_t> kChanceOfGoingDeeperWhenMakingAccessChain =
{50, 95};
const std::pair<uint32_t, uint32_t>
kChanceOfHavingTwoBlocksInLoopToCreateIntSynonym = {50, 80};
const std::pair<uint32_t, uint32_t> kChanceOfInliningFunction = {10, 90};
const std::pair<uint32_t, uint32_t> kChanceOfInterchangingZeroLikeConstants = {
10, 90};
const std::pair<uint32_t, uint32_t>
kChanceOfInterchangingSignednessOfIntegerOperands = {10, 90};
const std::pair<uint32_t, uint32_t> kChanceOfInvertingComparisonOperators = {
20, 50};
const std::pair<uint32_t, uint32_t> kChanceOfMakingDonorLivesafe = {40, 60};
const std::pair<uint32_t, uint32_t> kChanceOfMakingVectorOperationDynamic = {
20, 90};
const std::pair<uint32_t, uint32_t> kChanceOfMergingBlocks = {20, 95};
const std::pair<uint32_t, uint32_t> kChanceOfMergingFunctionReturns = {20, 90};
const std::pair<uint32_t, uint32_t> kChanceOfMovingBlockDown = {20, 50};
const std::pair<uint32_t, uint32_t> kChanceOfMutatingPointer = {20, 90};
const std::pair<uint32_t, uint32_t> kChanceOfObfuscatingConstant = {10, 90};
const std::pair<uint32_t, uint32_t> kChanceOfOutliningFunction = {10, 90};
const std::pair<uint32_t, uint32_t> kChanceOfPermutingFunctionVariables = {30,
90};
const std::pair<uint32_t, uint32_t> kChanceOfPermutingInstructions = {20, 70};
const std::pair<uint32_t, uint32_t> kChanceOfPermutingParameters = {30, 90};
const std::pair<uint32_t, uint32_t> kChanceOfPermutingPhiOperands = {30, 90};
const std::pair<uint32_t, uint32_t> kChanceOfPropagatingInstructionsDown = {20,
70};
const std::pair<uint32_t, uint32_t> kChanceOfPropagatingInstructionsUp = {20,
70};
const std::pair<uint32_t, uint32_t> kChanceOfPushingIdThroughVariable = {5, 50};
const std::pair<uint32_t, uint32_t>
kChanceOfReplacingAddSubMulWithCarryingExtended = {20, 70};
const std::pair<uint32_t, uint32_t>
kChanceOfReplacingBranchFromDeadBlockWithExit = {10, 65};
const std::pair<uint32_t, uint32_t> kChanceOfReplacingCopyMemoryWithLoadStore =
{20, 90};
const std::pair<uint32_t, uint32_t> kChanceOfReplacingCopyObjectWithStoreLoad =
{20, 90};
const std::pair<uint32_t, uint32_t> kChanceOfReplacingIdWithSynonym = {10, 90};
const std::pair<uint32_t, uint32_t> kChanceOfReplacingIrrelevantId = {35, 95};
const std::pair<uint32_t, uint32_t>
kChanceOfReplacingLinearAlgebraInstructions = {10, 90};
const std::pair<uint32_t, uint32_t> kChanceOfReplacingLoadStoreWithCopyMemory =
{20, 90};
const std::pair<uint32_t, uint32_t>
kChanceOfReplacingOpPhiIdFromDeadPredecessor = {20, 90};
const std::pair<uint32_t, uint32_t>
kChanceOfReplacingOpSelectWithConditionalBranch = {20, 90};
const std::pair<uint32_t, uint32_t> kChanceOfReplacingParametersWithGlobals = {
30, 70};
const std::pair<uint32_t, uint32_t> kChanceOfReplacingParametersWithStruct = {
20, 40};
const std::pair<uint32_t, uint32_t> kChanceOfSplittingBlock = {40, 95};
const std::pair<uint32_t, uint32_t>
kChanceOfSwappingAnotherPairOfFunctionVariables = {30, 90};
const std::pair<uint32_t, uint32_t> kChanceOfSwappingConditionalBranchOperands =
{10, 70};
const std::pair<uint32_t, uint32_t> kChanceOfSwappingFunctions = {10, 90};
const std::pair<uint32_t, uint32_t> kChanceOfTogglingAccessChainInstruction = {
20, 90};
const std::pair<uint32_t, uint32_t> kChanceOfWrappingRegionInSelection = {70,
90};
const std::pair<uint32_t, uint32_t> kChanceOfWrappingVectorSynonym = {10, 90};
// Default limits for various quantities that are chosen during fuzzing.
// Keep them in alphabetical order.
const uint32_t kDefaultMaxEquivalenceClassSizeForDataSynonymFactClosure = 1000;
const uint32_t kDefaultMaxLoopControlPartialCount = 100;
const uint32_t kDefaultMaxLoopControlPeelCount = 100;
const uint32_t kDefaultMaxLoopLimit = 20;
const uint32_t kDefaultMaxNewArraySizeLimit = 100;
// TODO(https://github.com/KhronosGroup/SPIRV-Tools/issues/3424):
// think whether there is a better limit on the maximum number of parameters.
const uint32_t kDefaultMaxNumberOfFunctionParameters = 128;
const uint32_t kDefaultMaxNumberOfNewParameters = 15;
const uint32_t kGetDefaultMaxNumberOfParametersReplacedWithStruct = 5;
// Default functions for controlling how deep to go during recursive
// generation/transformation. Keep them in alphabetical order.
const std::function<bool(uint32_t, RandomGenerator*)>
kDefaultGoDeeperInConstantObfuscation =
[](uint32_t current_depth, RandomGenerator* random_generator) -> bool {
double chance = 1.0 / std::pow(3.0, static_cast<float>(current_depth + 1));
return random_generator->RandomDouble() < chance;
};
} // namespace
FuzzerContext::FuzzerContext(std::unique_ptr<RandomGenerator> random_generator,
uint32_t min_fresh_id, bool is_wgsl_compatible)
: random_generator_(std::move(random_generator)),
next_fresh_id_(min_fresh_id),
is_wgsl_compatible_(is_wgsl_compatible),
max_equivalence_class_size_for_data_synonym_fact_closure_(
kDefaultMaxEquivalenceClassSizeForDataSynonymFactClosure),
max_loop_control_partial_count_(kDefaultMaxLoopControlPartialCount),
max_loop_control_peel_count_(kDefaultMaxLoopControlPeelCount),
max_loop_limit_(kDefaultMaxLoopLimit),
max_new_array_size_limit_(kDefaultMaxNewArraySizeLimit),
max_number_of_function_parameters_(kDefaultMaxNumberOfFunctionParameters),
max_number_of_new_parameters_(kDefaultMaxNumberOfNewParameters),
max_number_of_parameters_replaced_with_struct_(
kGetDefaultMaxNumberOfParametersReplacedWithStruct),
go_deeper_in_constant_obfuscation_(
kDefaultGoDeeperInConstantObfuscation) {
chance_of_accepting_repeated_pass_recommendation_ =
ChooseBetweenMinAndMax(kChanceOfAcceptingRepeatedPassRecommendation);
chance_of_adding_access_chain_ =
ChooseBetweenMinAndMax(kChanceOfAddingAccessChain);
chance_of_adding_another_pass_to_pass_loop_ =
ChooseBetweenMinAndMax(kChanceOfAddingAnotherPassToPassLoop);
chance_of_adding_another_struct_field_ =
ChooseBetweenMinAndMax(kChanceOfAddingAnotherStructField);
chance_of_adding_array_or_struct_type_ =
ChooseBetweenMinAndMax(kChanceOfAddingArrayOrStructType);
chance_of_adding_atomic_load_ =
ChooseBetweenMinAndMax(KChanceOfAddingAtomicLoad);
chance_of_adding_atomic_store_ =
ChooseBetweenMinAndMax(KChanceOfAddingAtomicStore);
chance_of_adding_bit_instruction_synonym_ =
ChooseBetweenMinAndMax(kChanceOfAddingBitInstructionSynonym);
chance_of_adding_both_branches_when_replacing_opselect_ =
ChooseBetweenMinAndMax(kChanceOfAddingBothBranchesWhenReplacingOpSelect);
chance_of_adding_composite_extract_ =
ChooseBetweenMinAndMax(kChanceOfAddingCompositeExtract);
chance_of_adding_composite_insert_ =
ChooseBetweenMinAndMax(kChanceOfAddingCompositeInsert);
chance_of_adding_copy_memory_ =
ChooseBetweenMinAndMax(kChanceOfAddingCopyMemory);
chance_of_adding_dead_block_ =
ChooseBetweenMinAndMax(kChanceOfAddingDeadBlock);
chance_of_adding_dead_break_ =
ChooseBetweenMinAndMax(kChanceOfAddingDeadBreak);
chance_of_adding_dead_continue_ =
ChooseBetweenMinAndMax(kChanceOfAddingDeadContinue);
chance_of_adding_equation_instruction_ =
ChooseBetweenMinAndMax(kChanceOfAddingEquationInstruction);
chance_of_adding_global_variable_ =
ChooseBetweenMinAndMax(kChanceOfAddingGlobalVariable);
chance_of_adding_load_ = ChooseBetweenMinAndMax(kChanceOfAddingLoad);
chance_of_adding_loop_preheader_ =
ChooseBetweenMinAndMax(kChanceOfAddingLoopPreheader);
chance_of_adding_image_sample_unused_components_ =
ChooseBetweenMinAndMax(kChanceOfAddingImageSampleUnusedComponents);
chance_of_adding_local_variable_ =
ChooseBetweenMinAndMax(kChanceOfAddingLocalVariable);
chance_of_adding_matrix_type_ =
ChooseBetweenMinAndMax(kChanceOfAddingMatrixType);
chance_of_adding_no_contraction_decoration_ =
ChooseBetweenMinAndMax(kChanceOfAddingNoContractionDecoration);
chance_of_adding_opphi_synonym_ =
ChooseBetweenMinAndMax(kChanceOfAddingOpPhiSynonym);
chance_of_adding_parameters =
ChooseBetweenMinAndMax(kChanceOfAddingParameters);
chance_of_adding_relaxed_decoration_ =
ChooseBetweenMinAndMax(kChanceOfAddingRelaxedDecoration);
chance_of_adding_store_ = ChooseBetweenMinAndMax(kChanceOfAddingStore);
chance_of_adding_true_branch_when_replacing_opselect_ =
ChooseBetweenMinAndMax(kChanceOfAddingTrueBranchWhenReplacingOpSelect);
chance_of_adding_vector_shuffle_ =
ChooseBetweenMinAndMax(kChanceOfAddingVectorShuffle);
chance_of_adding_vector_type_ =
ChooseBetweenMinAndMax(kChanceOfAddingVectorType);
chance_of_adjusting_branch_weights_ =
ChooseBetweenMinAndMax(kChanceOfAdjustingBranchWeights);
chance_of_adjusting_function_control_ =
ChooseBetweenMinAndMax(kChanceOfAdjustingFunctionControl);
chance_of_adding_synonyms_ = ChooseBetweenMinAndMax(kChanceOfAddingSynonyms);
chance_of_adjusting_loop_control_ =
ChooseBetweenMinAndMax(kChanceOfAdjustingLoopControl);
chance_of_adjusting_memory_operands_mask_ =
ChooseBetweenMinAndMax(kChanceOfAdjustingMemoryOperandsMask);
chance_of_adjusting_selection_control_ =
ChooseBetweenMinAndMax(kChanceOfAdjustingSelectionControl);
chance_of_calling_function_ =
ChooseBetweenMinAndMax(kChanceOfCallingFunction);
chance_of_choosing_struct_type_vs_array_type_ =
ChooseBetweenMinAndMax(kChanceOfChoosingStructTypeVsArrayType);
chance_of_choosing_workgroup_storage_class_ =
ChooseBetweenMinAndMax(kChanceOfChoosingWorkgroupStorageClass);
chance_of_constructing_composite_ =
ChooseBetweenMinAndMax(kChanceOfConstructingComposite);
chance_of_copying_object_ = ChooseBetweenMinAndMax(kChanceOfCopyingObject);
chance_of_creating_int_synonyms_using_loops_ =
ChooseBetweenMinAndMax(kChanceOfCreatingIntSynonymsUsingLoops);
chance_of_donating_additional_module_ =
ChooseBetweenMinAndMax(kChanceOfDonatingAdditionalModule);
chance_of_duplicating_region_with_selection_ =
ChooseBetweenMinAndMax(kChanceOfDuplicatingRegionWithSelection);
chance_of_expanding_vector_reduction_ =
ChooseBetweenMinAndMax(kChanceOfExpandingVectorReduction);
chance_of_flattening_conditional_branch_ =
ChooseBetweenMinAndMax(kChanceOfFlatteningConditionalBranch);
chance_of_going_deeper_to_extract_composite_ =
ChooseBetweenMinAndMax(kChanceOfGoingDeeperToExtractComposite);
chance_of_going_deeper_to_insert_in_composite_ =
ChooseBetweenMinAndMax(kChanceOfGoingDeeperToInsertInComposite);
chance_of_going_deeper_when_making_access_chain_ =
ChooseBetweenMinAndMax(kChanceOfGoingDeeperWhenMakingAccessChain);
chance_of_having_two_blocks_in_loop_to_create_int_synonym_ =
ChooseBetweenMinAndMax(kChanceOfHavingTwoBlocksInLoopToCreateIntSynonym);
chance_of_inlining_function_ =
ChooseBetweenMinAndMax(kChanceOfInliningFunction);
chance_of_interchanging_signedness_of_integer_operands_ =
ChooseBetweenMinAndMax(kChanceOfInterchangingSignednessOfIntegerOperands);
chance_of_interchanging_zero_like_constants_ =
ChooseBetweenMinAndMax(kChanceOfInterchangingZeroLikeConstants);
chance_of_inverting_comparison_operators_ =
ChooseBetweenMinAndMax(kChanceOfInvertingComparisonOperators);
chance_of_making_donor_livesafe_ =
ChooseBetweenMinAndMax(kChanceOfMakingDonorLivesafe);
chance_of_making_vector_operation_dynamic_ =
ChooseBetweenMinAndMax(kChanceOfMakingVectorOperationDynamic);
chance_of_merging_blocks_ = ChooseBetweenMinAndMax(kChanceOfMergingBlocks);
chance_of_merging_function_returns_ =
ChooseBetweenMinAndMax(kChanceOfMergingFunctionReturns);
chance_of_moving_block_down_ =
ChooseBetweenMinAndMax(kChanceOfMovingBlockDown);
chance_of_mutating_pointer_ =
ChooseBetweenMinAndMax(kChanceOfMutatingPointer);
chance_of_obfuscating_constant_ =
ChooseBetweenMinAndMax(kChanceOfObfuscatingConstant);
chance_of_outlining_function_ =
ChooseBetweenMinAndMax(kChanceOfOutliningFunction);
chance_of_permuting_function_variables_ =
ChooseBetweenMinAndMax(kChanceOfPermutingFunctionVariables);
chance_of_permuting_instructions_ =
ChooseBetweenMinAndMax(kChanceOfPermutingInstructions);
chance_of_permuting_parameters_ =
ChooseBetweenMinAndMax(kChanceOfPermutingParameters);
chance_of_permuting_phi_operands_ =
ChooseBetweenMinAndMax(kChanceOfPermutingPhiOperands);
chance_of_propagating_instructions_down_ =
ChooseBetweenMinAndMax(kChanceOfPropagatingInstructionsDown);
chance_of_propagating_instructions_up_ =
ChooseBetweenMinAndMax(kChanceOfPropagatingInstructionsUp);
chance_of_pushing_id_through_variable_ =
ChooseBetweenMinAndMax(kChanceOfPushingIdThroughVariable);
chance_of_replacing_add_sub_mul_with_carrying_extended_ =
ChooseBetweenMinAndMax(kChanceOfReplacingAddSubMulWithCarryingExtended);
chance_of_replacing_branch_from_dead_block_with_exit_ =
ChooseBetweenMinAndMax(kChanceOfReplacingBranchFromDeadBlockWithExit);
chance_of_replacing_copy_memory_with_load_store_ =
ChooseBetweenMinAndMax(kChanceOfReplacingCopyMemoryWithLoadStore);
chance_of_replacing_copyobject_with_store_load_ =
ChooseBetweenMinAndMax(kChanceOfReplacingCopyObjectWithStoreLoad);
chance_of_replacing_id_with_synonym_ =
ChooseBetweenMinAndMax(kChanceOfReplacingIdWithSynonym);
chance_of_replacing_irrelevant_id_ =
ChooseBetweenMinAndMax(kChanceOfReplacingIrrelevantId);
chance_of_replacing_linear_algebra_instructions_ =
ChooseBetweenMinAndMax(kChanceOfReplacingLinearAlgebraInstructions);
chance_of_replacing_load_store_with_copy_memory_ =
ChooseBetweenMinAndMax(kChanceOfReplacingLoadStoreWithCopyMemory);
chance_of_replacing_opphi_id_from_dead_predecessor_ =
ChooseBetweenMinAndMax(kChanceOfReplacingOpPhiIdFromDeadPredecessor);
chance_of_replacing_opselect_with_conditional_branch_ =
ChooseBetweenMinAndMax(kChanceOfReplacingOpSelectWithConditionalBranch);
chance_of_replacing_parameters_with_globals_ =
ChooseBetweenMinAndMax(kChanceOfReplacingParametersWithGlobals);
chance_of_replacing_parameters_with_struct_ =
ChooseBetweenMinAndMax(kChanceOfReplacingParametersWithStruct);
chance_of_splitting_block_ = ChooseBetweenMinAndMax(kChanceOfSplittingBlock);
chance_of_swapping_another_pair_of_function_variables_ =
ChooseBetweenMinAndMax(kChanceOfSwappingAnotherPairOfFunctionVariables);
chance_of_swapping_conditional_branch_operands_ =
ChooseBetweenMinAndMax(kChanceOfSwappingConditionalBranchOperands);
chance_of_swapping_functions_ =
ChooseBetweenMinAndMax(kChanceOfSwappingFunctions);
chance_of_toggling_access_chain_instruction_ =
ChooseBetweenMinAndMax(kChanceOfTogglingAccessChainInstruction);
chance_of_wrapping_region_in_selection_ =
ChooseBetweenMinAndMax(kChanceOfWrappingRegionInSelection);
chance_of_wrapping_vector_synonym_ =
ChooseBetweenMinAndMax(kChanceOfWrappingVectorSynonym);
}
FuzzerContext::~FuzzerContext() = default;
uint32_t FuzzerContext::GetFreshId() { return next_fresh_id_++; }
std::vector<uint32_t> FuzzerContext::GetFreshIds(const uint32_t count) {
std::vector<uint32_t> fresh_ids(count);
for (uint32_t& fresh_id : fresh_ids) {
fresh_id = next_fresh_id_++;
}
return fresh_ids;
}
bool FuzzerContext::ChooseEven() { return random_generator_->RandomBool(); }
bool FuzzerContext::ChoosePercentage(uint32_t percentage_chance) {
assert(percentage_chance <= 100);
return random_generator_->RandomPercentage() < percentage_chance;
}
uint32_t FuzzerContext::ChooseBetweenMinAndMax(
const std::pair<uint32_t, uint32_t>& min_max) {
assert(min_max.first <= min_max.second);
return min_max.first +
random_generator_->RandomUint32(min_max.second - min_max.first + 1);
}
protobufs::TransformationAddSynonym::SynonymType
FuzzerContext::GetRandomSynonymType() {
// value_count method is guaranteed to return a value greater than 0.
auto result_index = ChooseBetweenMinAndMax(
{0, static_cast<uint32_t>(
protobufs::TransformationAddSynonym::SynonymType_descriptor()
->value_count() -
1)});
auto result = protobufs::TransformationAddSynonym::SynonymType_descriptor()
->value(result_index)
->number();
assert(protobufs::TransformationAddSynonym::SynonymType_IsValid(result) &&
"|result| is not a value of SynonymType");
return static_cast<protobufs::TransformationAddSynonym::SynonymType>(result);
}
uint32_t FuzzerContext::GetIdBoundLimit() const { return kIdBoundLimit; }
uint32_t FuzzerContext::GetTransformationLimit() const {
return kTransformationLimit;
}
uint32_t FuzzerContext::GetMinFreshId(opt::IRContext* ir_context) {
return ir_context->module()->id_bound() + kIdBoundGap;
}
} // namespace fuzz
} // namespace spvtools
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