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https://github.com/KhronosGroup/SPIRV-Tools
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77fb303e58
Adds a fuzzer pass that inserts function calls into the module at random. Calls from dead blocks can be arbitrary (so long as they do not introduce recursion), while calls from other blocks can only be to livesafe functions. The change fixes some oversights in transformations to replace constants with uniforms and to obfuscate constants which testing of this fuzzer pass identified.
59 lines
2.2 KiB
C++
59 lines
2.2 KiB
C++
// Copyright (c) 2020 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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#ifndef SOURCE_FUZZ_FUZZER_PASS_ADD_FUNCTION_CALLS_H_
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#define SOURCE_FUZZ_FUZZER_PASS_ADD_FUNCTION_CALLS_H_
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#include "source/fuzz/fuzzer_pass.h"
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namespace spvtools {
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namespace fuzz {
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// Fuzzer pass that adds calls at random to (a) livesafe functions, from
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// anywhere, and (b) any functions, from dead blocks.
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class FuzzerPassAddFunctionCalls : public FuzzerPass {
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public:
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FuzzerPassAddFunctionCalls(
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opt::IRContext* ir_context, FactManager* fact_manager,
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FuzzerContext* fuzzer_context,
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protobufs::TransformationSequence* transformations);
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~FuzzerPassAddFunctionCalls();
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void Apply() override;
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private:
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// Identify all instructions available at |instr_it|, in block |block| of
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// |function|, that are potentially suitable as function call actual
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// parameters. The results are grouped by type.
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std::map<uint32_t, std::vector<opt::Instruction*>>
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GetAvailableInstructionsSuitableForActualParameters(
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opt::Function* function, opt::BasicBlock* block,
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const opt::BasicBlock::iterator& inst_it);
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// Randomly chooses suitable arguments to invoke |callee| right before
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// instruction |caller_inst_it| of block |caller_block| in |caller_function|,
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// based on both existing available instructions and the addition of new
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// instructions to the module.
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std::vector<uint32_t> ChooseFunctionCallArguments(
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const opt::Function& callee, opt::Function* caller_function,
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opt::BasicBlock* caller_block,
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const opt::BasicBlock::iterator& caller_inst_it);
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};
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} // namespace fuzz
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} // namespace spvtools
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#endif // SOURCE_FUZZ_FUZZER_PASS_ADD_FUNCTION_CALLS_H_
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