| // 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 |
| // DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE |
| // FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
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| // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
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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/change_unary_operators.h" |
| |
| #include <memory> |
| |
| #include "src/tint/fuzzers/tint_ast_fuzzer/mutations/change_unary_operator.h" |
| #include "src/tint/fuzzers/tint_ast_fuzzer/util.h" |
| #include "src/tint/lang/core/type/reference.h" |
| #include "src/tint/lang/wgsl/ast/unary_op_expression.h" |
| |
| namespace tint::fuzzers::ast_fuzzer { |
| |
| MutationList MutationFinderChangeUnaryOperators::FindMutations( |
| const tint::Program& program, |
| NodeIdMap* node_id_map, |
| ProbabilityContext* /*unused*/) const { |
| MutationList result; |
| |
| // Iterate through all AST nodes and for each valid unary op expression node, |
| // try to replace the node's unary operator. |
| for (const auto* node : program.ASTNodes().Objects()) { |
| const auto* unary_expr = tint::As<ast::UnaryOpExpression>(node); |
| |
| // Transformation applies only when the node represents a valid unary |
| // expression. |
| if (!unary_expr) { |
| continue; |
| } |
| |
| // Get the type of the unary expression. |
| const auto* type = program.Sem().Get(unary_expr)->Type(); |
| const auto* basic_type = type->Is<core::type::Reference>() |
| ? type->As<core::type::Reference>()->StoreType() |
| : type; |
| |
| // Only signed integer or vector of signed integer can be mutated. |
| if (!basic_type->is_signed_integer_scalar_or_vector()) { |
| continue; |
| } |
| |
| // Only complement and negation operators can be swapped. |
| if (!(unary_expr->op == core::UnaryOp::kComplement || |
| unary_expr->op == core::UnaryOp::kNegation)) { |
| continue; |
| } |
| |
| result.push_back(std::make_unique<MutationChangeUnaryOperator>( |
| node_id_map->GetId(unary_expr), |
| MutationChangeUnaryOperator::ToggleOperator(unary_expr->op))); |
| } |
| |
| return result; |
| } |
| |
| uint32_t MutationFinderChangeUnaryOperators::GetChanceOfApplyingMutation( |
| ProbabilityContext* probability_context) const { |
| return probability_context->GetChanceOfChangingUnaryOperators(); |
| } |
| |
| } // namespace tint::fuzzers::ast_fuzzer |