mirror of
https://github.com/KhronosGroup/SPIRV-Tools
synced 2024-10-18 19:20:05 +00:00
f62357e7b8
This transformation, given the header of a selection construct with branching instruction OpBranchConditional, flattens it. Side-effecting operations such as OpLoad, OpStore and OpFunctionCall are enclosed within smaller conditionals. It is applicable if the construct does not contain inner selection constructs or loops, or atomic or barrier instructions. The corresponding fuzzer pass looks for selection headers and tries to flatten them. Needed for the issue #3544, but it does not fix it completely.
421 lines
20 KiB
C++
421 lines
20 KiB
C++
// Copyright (c) 2019 Google LLC
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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.h"
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#include <cassert>
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#include <memory>
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#include "source/fuzz/fact_manager/fact_manager.h"
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#include "source/fuzz/fuzzer_context.h"
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#include "source/fuzz/fuzzer_pass_add_access_chains.h"
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#include "source/fuzz/fuzzer_pass_add_composite_inserts.h"
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#include "source/fuzz/fuzzer_pass_add_composite_types.h"
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#include "source/fuzz/fuzzer_pass_add_copy_memory.h"
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#include "source/fuzz/fuzzer_pass_add_dead_blocks.h"
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#include "source/fuzz/fuzzer_pass_add_dead_breaks.h"
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#include "source/fuzz/fuzzer_pass_add_dead_continues.h"
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#include "source/fuzz/fuzzer_pass_add_equation_instructions.h"
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#include "source/fuzz/fuzzer_pass_add_function_calls.h"
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#include "source/fuzz/fuzzer_pass_add_global_variables.h"
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#include "source/fuzz/fuzzer_pass_add_image_sample_unused_components.h"
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#include "source/fuzz/fuzzer_pass_add_loads.h"
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#include "source/fuzz/fuzzer_pass_add_local_variables.h"
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#include "source/fuzz/fuzzer_pass_add_loop_preheaders.h"
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#include "source/fuzz/fuzzer_pass_add_no_contraction_decorations.h"
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#include "source/fuzz/fuzzer_pass_add_opphi_synonyms.h"
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#include "source/fuzz/fuzzer_pass_add_parameters.h"
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#include "source/fuzz/fuzzer_pass_add_relaxed_decorations.h"
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#include "source/fuzz/fuzzer_pass_add_stores.h"
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#include "source/fuzz/fuzzer_pass_add_synonyms.h"
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#include "source/fuzz/fuzzer_pass_add_vector_shuffle_instructions.h"
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#include "source/fuzz/fuzzer_pass_adjust_branch_weights.h"
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#include "source/fuzz/fuzzer_pass_adjust_function_controls.h"
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#include "source/fuzz/fuzzer_pass_adjust_loop_controls.h"
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#include "source/fuzz/fuzzer_pass_adjust_memory_operands_masks.h"
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#include "source/fuzz/fuzzer_pass_adjust_selection_controls.h"
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#include "source/fuzz/fuzzer_pass_apply_id_synonyms.h"
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#include "source/fuzz/fuzzer_pass_construct_composites.h"
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#include "source/fuzz/fuzzer_pass_copy_objects.h"
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#include "source/fuzz/fuzzer_pass_donate_modules.h"
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#include "source/fuzz/fuzzer_pass_duplicate_regions_with_selections.h"
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#include "source/fuzz/fuzzer_pass_flatten_conditional_branches.h"
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#include "source/fuzz/fuzzer_pass_inline_functions.h"
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#include "source/fuzz/fuzzer_pass_interchange_signedness_of_integer_operands.h"
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#include "source/fuzz/fuzzer_pass_interchange_zero_like_constants.h"
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#include "source/fuzz/fuzzer_pass_invert_comparison_operators.h"
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#include "source/fuzz/fuzzer_pass_make_vector_operations_dynamic.h"
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#include "source/fuzz/fuzzer_pass_merge_blocks.h"
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#include "source/fuzz/fuzzer_pass_mutate_pointers.h"
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#include "source/fuzz/fuzzer_pass_obfuscate_constants.h"
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#include "source/fuzz/fuzzer_pass_outline_functions.h"
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#include "source/fuzz/fuzzer_pass_permute_blocks.h"
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#include "source/fuzz/fuzzer_pass_permute_function_parameters.h"
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#include "source/fuzz/fuzzer_pass_permute_instructions.h"
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#include "source/fuzz/fuzzer_pass_permute_phi_operands.h"
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#include "source/fuzz/fuzzer_pass_propagate_instructions_up.h"
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#include "source/fuzz/fuzzer_pass_push_ids_through_variables.h"
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#include "source/fuzz/fuzzer_pass_replace_adds_subs_muls_with_carrying_extended.h"
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#include "source/fuzz/fuzzer_pass_replace_copy_memories_with_loads_stores.h"
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#include "source/fuzz/fuzzer_pass_replace_copy_objects_with_stores_loads.h"
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#include "source/fuzz/fuzzer_pass_replace_irrelevant_ids.h"
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#include "source/fuzz/fuzzer_pass_replace_linear_algebra_instructions.h"
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#include "source/fuzz/fuzzer_pass_replace_loads_stores_with_copy_memories.h"
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#include "source/fuzz/fuzzer_pass_replace_opphi_ids_from_dead_predecessors.h"
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#include "source/fuzz/fuzzer_pass_replace_opselects_with_conditional_branches.h"
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#include "source/fuzz/fuzzer_pass_replace_parameter_with_global.h"
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#include "source/fuzz/fuzzer_pass_replace_params_with_struct.h"
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#include "source/fuzz/fuzzer_pass_split_blocks.h"
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#include "source/fuzz/fuzzer_pass_swap_commutable_operands.h"
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#include "source/fuzz/fuzzer_pass_swap_conditional_branch_operands.h"
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#include "source/fuzz/fuzzer_pass_toggle_access_chain_instruction.h"
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#include "source/fuzz/protobufs/spirvfuzz_protobufs.h"
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#include "source/fuzz/pseudo_random_generator.h"
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#include "source/fuzz/transformation_context.h"
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#include "source/opt/build_module.h"
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#include "source/spirv_fuzzer_options.h"
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#include "source/util/make_unique.h"
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namespace spvtools {
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namespace fuzz {
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namespace {
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const uint32_t kIdBoundGap = 100;
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const uint32_t kTransformationLimit = 500;
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const uint32_t kChanceOfApplyingAnotherPass = 85;
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// A convenience method to add a fuzzer pass to |passes| with probability 0.5.
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// All fuzzer passes take |ir_context|, |transformation_context|,
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// |fuzzer_context| and |transformation_sequence_out| as parameters. Extra
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// arguments can be provided via |extra_args|.
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template <typename T, typename... Args>
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void MaybeAddPass(
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std::vector<std::unique_ptr<FuzzerPass>>* passes,
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opt::IRContext* ir_context, TransformationContext* transformation_context,
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FuzzerContext* fuzzer_context,
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protobufs::TransformationSequence* transformation_sequence_out,
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Args&&... extra_args) {
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if (fuzzer_context->ChooseEven()) {
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passes->push_back(MakeUnique<T>(ir_context, transformation_context,
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fuzzer_context, transformation_sequence_out,
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std::forward<Args>(extra_args)...));
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}
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}
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} // namespace
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Fuzzer::Fuzzer(spv_target_env target_env, uint32_t seed,
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bool validate_after_each_fuzzer_pass,
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spv_validator_options validator_options)
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: target_env_(target_env),
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seed_(seed),
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validate_after_each_fuzzer_pass_(validate_after_each_fuzzer_pass),
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validator_options_(validator_options) {}
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Fuzzer::~Fuzzer() = default;
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void Fuzzer::SetMessageConsumer(MessageConsumer consumer) {
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consumer_ = std::move(consumer);
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}
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bool Fuzzer::ApplyPassAndCheckValidity(
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FuzzerPass* pass, const opt::IRContext& ir_context,
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const spvtools::SpirvTools& tools) const {
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pass->Apply();
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if (validate_after_each_fuzzer_pass_) {
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std::vector<uint32_t> binary_to_validate;
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ir_context.module()->ToBinary(&binary_to_validate, false);
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if (!tools.Validate(&binary_to_validate[0], binary_to_validate.size(),
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validator_options_)) {
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consumer_(SPV_MSG_INFO, nullptr, {},
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"Binary became invalid during fuzzing (set a breakpoint to "
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"inspect); stopping.");
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return false;
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}
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}
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return true;
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}
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Fuzzer::FuzzerResultStatus Fuzzer::Run(
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const std::vector<uint32_t>& binary_in,
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const protobufs::FactSequence& initial_facts,
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const std::vector<fuzzerutil::ModuleSupplier>& donor_suppliers,
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std::vector<uint32_t>* binary_out,
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protobufs::TransformationSequence* transformation_sequence_out) const {
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// Check compatibility between the library version being linked with and the
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// header files being used.
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GOOGLE_PROTOBUF_VERIFY_VERSION;
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spvtools::SpirvTools tools(target_env_);
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tools.SetMessageConsumer(consumer_);
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if (!tools.IsValid()) {
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consumer_(SPV_MSG_ERROR, nullptr, {},
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"Failed to create SPIRV-Tools interface; stopping.");
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return Fuzzer::FuzzerResultStatus::kFailedToCreateSpirvToolsInterface;
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}
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// Initial binary should be valid.
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if (!tools.Validate(&binary_in[0], binary_in.size(), validator_options_)) {
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consumer_(SPV_MSG_ERROR, nullptr, {},
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"Initial binary is invalid; stopping.");
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return Fuzzer::FuzzerResultStatus::kInitialBinaryInvalid;
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}
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// Build the module from the input binary.
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std::unique_ptr<opt::IRContext> ir_context =
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BuildModule(target_env_, consumer_, binary_in.data(), binary_in.size());
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assert(ir_context);
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// Make a PRNG from the seed passed to the fuzzer on creation.
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PseudoRandomGenerator random_generator(seed_);
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// The fuzzer will introduce new ids into the module. The module's id bound
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// gives the smallest id that can be used for this purpose. We add an offset
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// to this so that there is a sizeable gap between the ids used in the
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// original module and the ids used for fuzzing, as a readability aid.
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//
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// TODO(https://github.com/KhronosGroup/SPIRV-Tools/issues/2541) consider the
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// case where the maximum id bound is reached.
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auto minimum_fresh_id = ir_context->module()->id_bound() + kIdBoundGap;
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FuzzerContext fuzzer_context(&random_generator, minimum_fresh_id);
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FactManager fact_manager;
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fact_manager.AddFacts(consumer_, initial_facts, ir_context.get());
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TransformationContext transformation_context(&fact_manager,
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validator_options_);
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// Apply some semantics-preserving passes.
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// TODO(https://github.com/KhronosGroup/SPIRV-Tools/issues/3764): Enable
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// certain passes to run with a higher priority than the others.
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std::vector<std::unique_ptr<FuzzerPass>> passes;
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while (passes.empty()) {
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MaybeAddPass<FuzzerPassAddAccessChains>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassAddCompositeInserts>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassAddCompositeTypes>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassAddCopyMemory>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassAddDeadBlocks>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassAddDeadBreaks>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassAddDeadContinues>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassAddEquationInstructions>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassAddFunctionCalls>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassAddGlobalVariables>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassAddImageSampleUnusedComponents>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassAddLoads>(&passes, ir_context.get(),
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&transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassAddLocalVariables>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassAddLoopPreheaders>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassAddOpPhiSynonyms>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassAddParameters>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassAddRelaxedDecorations>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassAddStores>(&passes, ir_context.get(),
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&transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassAddSynonyms>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassAddVectorShuffleInstructions>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassApplyIdSynonyms>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassConstructComposites>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassCopyObjects>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassDonateModules>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out, donor_suppliers);
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MaybeAddPass<FuzzerPassDuplicateRegionsWithSelections>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassFlattenConditionalBranches>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassInlineFunctions>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassInvertComparisonOperators>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassMakeVectorOperationsDynamic>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassMergeBlocks>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassMutatePointers>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassObfuscateConstants>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassOutlineFunctions>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassPermuteBlocks>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassPermuteFunctionParameters>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassPermuteInstructions>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassPropagateInstructionsUp>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassPushIdsThroughVariables>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassReplaceAddsSubsMulsWithCarryingExtended>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassReplaceCopyMemoriesWithLoadsStores>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassReplaceCopyObjectsWithStoresLoads>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassReplaceLoadsStoresWithCopyMemories>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassReplaceParameterWithGlobal>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassReplaceLinearAlgebraInstructions>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassReplaceOpSelectsWithConditionalBranches>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassReplaceParamsWithStruct>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassSplitBlocks>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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MaybeAddPass<FuzzerPassSwapBranchConditionalOperands>(
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&passes, ir_context.get(), &transformation_context, &fuzzer_context,
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transformation_sequence_out);
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}
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bool is_first = true;
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while (static_cast<uint32_t>(
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transformation_sequence_out->transformation_size()) <
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kTransformationLimit &&
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(is_first ||
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fuzzer_context.ChoosePercentage(kChanceOfApplyingAnotherPass))) {
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is_first = false;
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if (!ApplyPassAndCheckValidity(
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passes[fuzzer_context.RandomIndex(passes)].get(), *ir_context,
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tools)) {
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return Fuzzer::FuzzerResultStatus::kFuzzerPassLedToInvalidModule;
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}
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}
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|
|
// Now apply some passes that it does not make sense to apply repeatedly,
|
|
// as they do not unlock other passes.
|
|
std::vector<std::unique_ptr<FuzzerPass>> final_passes;
|
|
MaybeAddPass<FuzzerPassAdjustBranchWeights>(
|
|
&final_passes, ir_context.get(), &transformation_context, &fuzzer_context,
|
|
transformation_sequence_out);
|
|
MaybeAddPass<FuzzerPassAdjustFunctionControls>(
|
|
&final_passes, ir_context.get(), &transformation_context, &fuzzer_context,
|
|
transformation_sequence_out);
|
|
MaybeAddPass<FuzzerPassAdjustLoopControls>(
|
|
&final_passes, ir_context.get(), &transformation_context, &fuzzer_context,
|
|
transformation_sequence_out);
|
|
MaybeAddPass<FuzzerPassAdjustMemoryOperandsMasks>(
|
|
&final_passes, ir_context.get(), &transformation_context, &fuzzer_context,
|
|
transformation_sequence_out);
|
|
MaybeAddPass<FuzzerPassAdjustSelectionControls>(
|
|
&final_passes, ir_context.get(), &transformation_context, &fuzzer_context,
|
|
transformation_sequence_out);
|
|
MaybeAddPass<FuzzerPassAddNoContractionDecorations>(
|
|
&final_passes, ir_context.get(), &transformation_context, &fuzzer_context,
|
|
transformation_sequence_out);
|
|
MaybeAddPass<FuzzerPassInterchangeSignednessOfIntegerOperands>(
|
|
&final_passes, ir_context.get(), &transformation_context, &fuzzer_context,
|
|
transformation_sequence_out);
|
|
MaybeAddPass<FuzzerPassInterchangeZeroLikeConstants>(
|
|
&final_passes, ir_context.get(), &transformation_context, &fuzzer_context,
|
|
transformation_sequence_out);
|
|
MaybeAddPass<FuzzerPassPermutePhiOperands>(
|
|
&final_passes, ir_context.get(), &transformation_context, &fuzzer_context,
|
|
transformation_sequence_out);
|
|
MaybeAddPass<FuzzerPassReplaceOpPhiIdsFromDeadPredecessors>(
|
|
&final_passes, ir_context.get(), &transformation_context, &fuzzer_context,
|
|
transformation_sequence_out);
|
|
MaybeAddPass<FuzzerPassReplaceIrrelevantIds>(
|
|
&passes, ir_context.get(), &transformation_context, &fuzzer_context,
|
|
transformation_sequence_out);
|
|
MaybeAddPass<FuzzerPassSwapCommutableOperands>(
|
|
&final_passes, ir_context.get(), &transformation_context, &fuzzer_context,
|
|
transformation_sequence_out);
|
|
MaybeAddPass<FuzzerPassToggleAccessChainInstruction>(
|
|
&final_passes, ir_context.get(), &transformation_context, &fuzzer_context,
|
|
transformation_sequence_out);
|
|
for (auto& pass : final_passes) {
|
|
if (!ApplyPassAndCheckValidity(pass.get(), *ir_context, tools)) {
|
|
return Fuzzer::FuzzerResultStatus::kFuzzerPassLedToInvalidModule;
|
|
}
|
|
}
|
|
|
|
// Encode the module as a binary.
|
|
ir_context->module()->ToBinary(binary_out, false);
|
|
|
|
return Fuzzer::FuzzerResultStatus::kComplete;
|
|
}
|
|
|
|
} // namespace fuzz
|
|
} // namespace spvtools
|