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// Copyright 2020 The Tint Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
#include <iostream>
#include <string>
#include <unordered_set>
#include "src/reader/wgsl/parser_impl.h"
#include "src/writer/wgsl/generator.h"
#define ASSERT_EQ(A, B) \
do { \
decltype(A) assert_a = (A); \
decltype(B) assert_b = (B); \
if (assert_a != assert_b) { \
std::cerr << "ASSERT_EQ(" #A ", " #B ") failed:\n" \
<< #A << " was: " << assert_a << "\n" \
<< #B << " was: " << assert_b << "\n"; \
__builtin_trap(); \
} \
} while (false)
#define ASSERT_TRUE(A) \
do { \
decltype(A) assert_a = (A); \
if (!assert_a) { \
std::cerr << "ASSERT_TRUE(" #A ") failed:\n" \
<< #A << " was: " << assert_a << "\n"; \
__builtin_trap(); \
} \
} while (false)
[[noreturn]] void TintInternalCompilerErrorReporter(
const tint::diag::List& diagnostics) {
auto printer = tint::diag::Printer::create(stderr, true);
tint::diag::Formatter{}.format(diagnostics, printer.get());
__builtin_trap();
}
extern "C" int LLVMFuzzerTestOneInput(const uint8_t* data, size_t size) {
std::string str(reinterpret_cast<const char*>(data), size);
tint::SetInternalCompilerErrorReporter(&TintInternalCompilerErrorReporter);
tint::Source::File file("test.wgsl", str);
// Parse the wgsl, create the src program
tint::reader::wgsl::ParserImpl parser(&file);
parser.set_max_errors(1);
if (!parser.Parse()) {
return 0;
}
auto src = parser.program();
if (!src.IsValid()) {
return 0;
}
// Clone the src program to dst
tint::Program dst(src.Clone());
// Expect the demangled AST printed with to_str() to match
ASSERT_EQ(src.to_str(), dst.to_str());
// Check that none of the AST nodes or type pointers in dst are found in src
std::unordered_set<tint::ast::Node*> src_nodes;
for (auto* src_node : src.ASTNodes().Objects()) {
src_nodes.emplace(src_node);
}
std::unordered_set<tint::sem::Type*> src_types;
for (auto* src_type : src.Types()) {
src_types.emplace(src_type);
}
for (auto* dst_node : dst.ASTNodes().Objects()) {
ASSERT_EQ(src_nodes.count(dst_node), 0u);
}
for (auto* dst_type : dst.Types()) {
ASSERT_EQ(src_types.count(dst_type), 0u);
}
// Regenerate the wgsl for the src program. We use this instead of the
// original source so that reformatting doesn't impact the final wgsl
// comparison.
std::string src_wgsl;
tint::writer::wgsl::Options wgsl_options;
{
auto result = tint::writer::wgsl::Generate(&src, wgsl_options);
ASSERT_TRUE(result.success);
src_wgsl = result.wgsl;
// Move the src program to a temporary that'll be dropped, so that the src
// program is released before we attempt to print the dst program. This
// guarantee that all the source program nodes and types are destructed and
// freed. ASAN should error if there's any remaining references in dst when
// we try to reconstruct the WGSL.
auto tmp = std::move(src);
}
// Print the dst program, check it matches the original source
auto result = tint::writer::wgsl::Generate(&dst, wgsl_options);
ASSERT_TRUE(result.success);
auto dst_wgsl = result.wgsl;
ASSERT_EQ(src_wgsl, dst_wgsl);
return 0;
}