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https://github.com/google/sandboxed-api.git
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67bc67bbef
This change changes the emitter to work on `clang::TypeDecl`s instead of `clang::QualType`s, as the latter only describe complete definitions. This allows us to better deal with situations where we would otherwise have a kind of circular type dependencies: For example, a `typedef` that depends on a `struct` which in turn has a member that references the typedef. For this to work, we now also record the actual source order of declarations, similar to what the libclang based header generator does. Also add some more tests for the newly covered cases. PiperOrigin-RevId: 488370914 Change-Id: I2d1baa863fb12d1801bf11a20f3f88df7fde3129
146 lines
4.5 KiB
C++
146 lines
4.5 KiB
C++
// Copyright 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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// https://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 SANDBOXED_API_TOOLS_CLANG_GENERATOR_GENERATOR_H_
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#define SANDBOXED_API_TOOLS_CLANG_GENERATOR_GENERATOR_H_
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#include <memory>
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#include <string>
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#include "absl/container/flat_hash_set.h"
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#include "absl/strings/string_view.h"
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#include "clang/AST/ASTConsumer.h"
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#include "clang/AST/Decl.h"
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#include "clang/AST/RecursiveASTVisitor.h"
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#include "clang/Frontend/CompilerInstance.h"
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#include "clang/Frontend/CompilerInvocation.h"
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#include "clang/Frontend/FrontendAction.h"
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#include "clang/Tooling/Tooling.h"
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#include "sandboxed_api/tools/clang_generator/emitter.h"
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#include "sandboxed_api/tools/clang_generator/types.h"
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namespace sapi {
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struct GeneratorOptions {
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template <typename ContainerT>
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GeneratorOptions& set_function_names(const ContainerT& value) {
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function_names.clear();
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function_names.insert(std::begin(value), std::end(value));
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return *this;
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}
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bool has_namespace() const { return !namespace_name.empty(); }
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absl::flat_hash_set<std::string> function_names;
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// Output options
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std::string work_dir;
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std::string name; // Name of the Sandboxed API
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std::string namespace_name; // Namespace to wrap the SAPI in
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// Output path of the generated header. Used to build the header include
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// guard.
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std::string out_file = "out_file.cc";
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std::string embed_dir; // Directory with embedded includes
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std::string embed_name; // Identifier of the embed object
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};
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class GeneratorASTVisitor
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: public clang::RecursiveASTVisitor<GeneratorASTVisitor> {
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public:
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explicit GeneratorASTVisitor(const GeneratorOptions& options)
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: options_(options) {}
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bool VisitTypeDecl(clang::TypeDecl* decl);
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bool VisitFunctionDecl(clang::FunctionDecl* decl);
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private:
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friend class GeneratorASTConsumer;
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TypeCollector collector_;
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std::vector<clang::FunctionDecl*> functions_;
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const GeneratorOptions& options_;
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};
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class GeneratorASTConsumer : public clang::ASTConsumer {
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public:
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GeneratorASTConsumer(std::string in_file, Emitter& emitter,
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const GeneratorOptions& options)
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: in_file_(std::move(in_file)), visitor_(options), emitter_(emitter) {}
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private:
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void HandleTranslationUnit(clang::ASTContext& context) override;
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std::string in_file_;
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GeneratorASTVisitor visitor_;
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Emitter& emitter_;
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};
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class GeneratorAction : public clang::ASTFrontendAction {
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public:
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GeneratorAction(Emitter& emitter, const GeneratorOptions& options)
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: emitter_(emitter), options_(options) {}
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private:
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std::unique_ptr<clang::ASTConsumer> CreateASTConsumer(
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clang::CompilerInstance&, llvm::StringRef in_file) override {
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return std::make_unique<GeneratorASTConsumer>(std::string(in_file),
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emitter_, options_);
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}
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bool hasCodeCompletionSupport() const override { return false; }
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Emitter& emitter_;
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const GeneratorOptions& options_;
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};
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class GeneratorFactory : public clang::tooling::FrontendActionFactory {
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public:
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// Does not take ownership
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GeneratorFactory(Emitter& emitter, const GeneratorOptions& options)
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: emitter_(emitter), options_(options) {}
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private:
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#if LLVM_VERSION_MAJOR >= 10
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std::unique_ptr<clang::FrontendAction> create() override {
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return std::make_unique<GeneratorAction>(emitter_, options_);
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}
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#else
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clang::FrontendAction* create() override {
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return new GeneratorAction(emitter_, options_);
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}
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#endif
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bool runInvocation(
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std::shared_ptr<clang::CompilerInvocation> invocation,
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clang::FileManager* files,
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std::shared_ptr<clang::PCHContainerOperations> pch_container_ops,
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clang::DiagnosticConsumer* diag_consumer) override;
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Emitter& emitter_;
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const GeneratorOptions& options_;
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};
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std::string GetOutputFilename(absl::string_view source_file);
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inline absl::string_view ToStringView(llvm::StringRef ref) {
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return absl::string_view(ref.data(), ref.size());
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}
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} // namespace sapi
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#endif // SANDBOXED_API_TOOLS_CLANG_GENERATOR_GENERATOR_H_
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