107 lines
3.8 KiB
C++
107 lines
3.8 KiB
C++
// Copyright 2020 The Tint Authors.
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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 <iostream>
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#include <string>
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#include <unordered_set>
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#include "src/reader/wgsl/parser_impl.h"
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#include "src/writer/wgsl/generator.h"
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#define ASSERT_EQ(A, B) \
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do { \
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decltype(A) assert_a = (A); \
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decltype(B) assert_b = (B); \
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if (assert_a != assert_b) { \
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std::cerr << "ASSERT_EQ(" #A ", " #B ") failed:\n" \
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<< #A << " was: " << assert_a << "\n" \
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<< #B << " was: " << assert_b << "\n"; \
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__builtin_trap(); \
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} \
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} while (false)
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#define ASSERT_TRUE(A) \
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do { \
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decltype(A) assert_a = (A); \
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if (!assert_a) { \
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std::cerr << "ASSERT_TRUE(" #A ") failed:\n" \
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<< #A << " was: " << assert_a << "\n"; \
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__builtin_trap(); \
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} \
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} while (false)
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extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
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std::string str(reinterpret_cast<const char*>(data), size);
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tint::Source::File file("test.wgsl", str);
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// Parse the wgsl, create the src program
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tint::reader::wgsl::ParserImpl parser(&file);
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parser.set_max_errors(1);
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if (!parser.Parse()) {
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return 0;
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}
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auto src = parser.program();
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if (!src.IsValid()) {
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return 0;
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}
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// Clone the src program to dst
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tint::Program dst(src.Clone());
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// Expect the demangled AST printed with to_str() to match
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ASSERT_EQ(src.to_str(), dst.to_str());
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// Check that none of the AST nodes or type pointers in dst are found in src
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std::unordered_set<tint::ast::Node*> src_nodes;
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for (auto* src_node : src.Nodes().Objects()) {
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src_nodes.emplace(src_node);
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}
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std::unordered_set<tint::type::Type*> src_types;
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for (auto* src_type : src.Types()) {
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src_types.emplace(src_type);
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}
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for (auto* dst_node : dst.Nodes().Objects()) {
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ASSERT_EQ(src_nodes.count(dst_node), 0u);
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}
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for (auto* dst_type : dst.Types()) {
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ASSERT_EQ(src_types.count(dst_type), 0u);
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}
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// Regenerate the wgsl for the src program. We use this instead of the
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// original source so that reformatting doesn't impact the final wgsl
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// comparison.
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std::string src_wgsl;
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{
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tint::writer::wgsl::Generator src_gen(&src);
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ASSERT_TRUE(src_gen.Generate());
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src_wgsl = src_gen.result();
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// Move the src program to a temporary that'll be dropped, so that the src
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// program is released before we attempt to print the dst program. This
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// guarantee that all the source program nodes and types are destructed and
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// freed. ASAN should error if there's any remaining references in dst when
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// we try to reconstruct the WGSL.
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auto tmp = std::move(src);
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}
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// Print the dst program, check it matches the original source
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tint::writer::wgsl::Generator dst_gen(&dst);
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ASSERT_TRUE(dst_gen.Generate());
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auto dst_wgsl = dst_gen.result();
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ASSERT_EQ(src_wgsl, dst_wgsl);
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return 0;
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}
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