| // Copyright 2021 The Dawn & Tint Authors |
| // |
| // Redistribution and use in source and binary forms, with or without |
| // modification, are permitted provided that the following conditions are met: |
| // |
| // 1. Redistributions of source code must retain the above copyright notice, this |
| // list of conditions and the following disclaimer. |
| // |
| // 2. Redistributions in binary form must reproduce the above copyright notice, |
| // this list of conditions and the following disclaimer in the documentation |
| // and/or other materials provided with the distribution. |
| // |
| // 3. Neither the name of the copyright holder nor the names of its |
| // contributors may be used to endorse or promote products derived from |
| // this software without specific prior written permission. |
| // |
| // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| // AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| // IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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| // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| #include "src/tint/fuzzers/tint_ast_fuzzer/mutation_finders/wrap_unary_operators.h" |
| |
| #include <memory> |
| #include <vector> |
| |
| #include "src/tint/fuzzers/tint_ast_fuzzer/expression_size.h" |
| #include "src/tint/fuzzers/tint_ast_fuzzer/mutations/wrap_unary_operator.h" |
| #include "src/tint/fuzzers/tint_ast_fuzzer/util.h" |
| #include "src/tint/lang/wgsl/sem/statement.h" |
| #include "src/tint/lang/wgsl/sem/value_expression.h" |
| |
| namespace tint::fuzzers::ast_fuzzer { |
| |
| namespace { |
| const size_t kMaxExpressionSize = 50; |
| } // namespace |
| |
| MutationList MutationFinderWrapUnaryOperators::FindMutations( |
| const tint::Program& program, |
| NodeIdMap* node_id_map, |
| ProbabilityContext* probability_context) const { |
| MutationList result; |
| |
| ExpressionSize expression_size(program); |
| |
| // Iterate through all ast nodes and for each expression node, try to wrap |
| // the inside a valid unary operator based on the type of the expression. |
| for (const auto* node : program.ASTNodes().Objects()) { |
| const auto* expr_ast_node = tint::As<ast::Expression>(node); |
| |
| // Transformation applies only when the node represents a valid expression. |
| if (!expr_ast_node) { |
| continue; |
| } |
| |
| if (expression_size(expr_ast_node) > kMaxExpressionSize) { |
| continue; |
| } |
| |
| const auto* expr_sem_node = program.Sem().GetVal(expr_ast_node); |
| |
| // Transformation applies only when the semantic node for the given |
| // expression is present. |
| if (!expr_sem_node) { |
| continue; |
| } |
| |
| std::vector<core::UnaryOp> valid_operators = |
| MutationWrapUnaryOperator::GetValidUnaryWrapper(*expr_sem_node); |
| |
| // Transformation only applies when there are available unary operators |
| // for the given expression. |
| if (valid_operators.empty()) { |
| continue; |
| } |
| |
| core::UnaryOp unary_op_wrapper = |
| valid_operators[probability_context->GetRandomIndex(valid_operators)]; |
| |
| result.push_back(std::make_unique<MutationWrapUnaryOperator>( |
| node_id_map->GetId(expr_ast_node), node_id_map->TakeFreshId(), unary_op_wrapper)); |
| } |
| |
| return result; |
| } |
| |
| uint32_t MutationFinderWrapUnaryOperators::GetChanceOfApplyingMutation( |
| ProbabilityContext* probability_context) const { |
| return probability_context->GetChanceOfWrappingUnaryOperators(); |
| } |
| |
| } // namespace tint::fuzzers::ast_fuzzer |