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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.
70 lines
2.8 KiB
C++
70 lines
2.8 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_TRANSFORMATION_FUNCTION_CALL_H_
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#define SOURCE_FUZZ_TRANSFORMATION_FUNCTION_CALL_H_
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#include "source/fuzz/fact_manager.h"
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#include "source/fuzz/protobufs/spirvfuzz_protobufs.h"
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#include "source/fuzz/transformation.h"
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#include "source/opt/ir_context.h"
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namespace spvtools {
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namespace fuzz {
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class TransformationFunctionCall : public Transformation {
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public:
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explicit TransformationFunctionCall(
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const protobufs::TransformationFunctionCall& message);
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TransformationFunctionCall(
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uint32_t fresh_id, uint32_t callee_id,
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const std::vector<uint32_t>& argument_id,
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const protobufs::InstructionDescriptor& instruction_to_insert_before);
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// - |message_.fresh_id| must be fresh
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// - |message_.instruction_to_insert_before| must identify an instruction
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// before which an OpFunctionCall can be legitimately inserted
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// - |message_.function_id| must be the id of a function, and calling the
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// function before the identified instruction must not introduce recursion
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// - |message_.arg_id| must provide suitable arguments for the function call
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// (they must have the right types and be available according to dominance
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// rules)
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// - If the insertion point is not in a dead block then |message_function_id|
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// must refer to a livesafe function, and every pointer argument in
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// |message_.arg_id| must refer to an arbitrary-valued variable
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bool IsApplicable(opt::IRContext* context,
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const FactManager& fact_manager) const override;
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// Adds an instruction of the form:
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// |fresh_id| = OpFunctionCall %type |callee_id| |arg_id...|
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// before |instruction_to_insert_before|, where %type is the return type of
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// |callee_id|.
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void Apply(opt::IRContext* context, FactManager* fact_manager) const override;
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protobufs::Transformation ToMessage() const override;
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// Helper to determine whether |function_id| is targeted by OpEntryPoint.
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static bool FunctionIsEntryPoint(opt::IRContext* context,
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uint32_t function_id);
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private:
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protobufs::TransformationFunctionCall message_;
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};
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} // namespace fuzz
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} // namespace spvtools
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#endif // SOURCE_FUZZ_TRANSFORMATION_FUNCTION_CALL_H_
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