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//===- unittests/Frontend/FrontendActionTest.cpp - FrontendAction tests ---===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "clang/Frontend/FrontendAction.h"
#include "clang/AST/ASTConsumer.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/RecursiveASTVisitor.h"
#include "clang/Frontend/CompilerInstance.h"
#include "clang/Frontend/CompilerInvocation.h"
#include "clang/Lex/Preprocessor.h"
#include "clang/Sema/Sema.h"
#include "llvm/ADT/Triple.h"
#include "llvm/Support/MemoryBuffer.h"
#include "gtest/gtest.h"
using namespace llvm;
using namespace clang;
namespace {
class TestASTFrontendAction : public ASTFrontendAction {
public:
TestASTFrontendAction(bool enableIncrementalProcessing = false,
bool actOnEndOfTranslationUnit = false)
: EnableIncrementalProcessing(enableIncrementalProcessing),
ActOnEndOfTranslationUnit(actOnEndOfTranslationUnit) { }
bool EnableIncrementalProcessing;
bool ActOnEndOfTranslationUnit;
std::vector<std::string> decl_names;
virtual bool BeginSourceFileAction(CompilerInstance &ci, StringRef filename) {
if (EnableIncrementalProcessing)
ci.getPreprocessor().enableIncrementalProcessing();
return ASTFrontendAction::BeginSourceFileAction(ci, filename);
}
virtual std::unique_ptr<ASTConsumer> CreateASTConsumer(CompilerInstance &CI,
StringRef InFile) {
return llvm::make_unique<Visitor>(CI, ActOnEndOfTranslationUnit,
decl_names);
}
private:
class Visitor : public ASTConsumer, public RecursiveASTVisitor<Visitor> {
public:
Visitor(CompilerInstance &CI, bool ActOnEndOfTranslationUnit,
std::vector<std::string> &decl_names) :
CI(CI), ActOnEndOfTranslationUnit(ActOnEndOfTranslationUnit),
decl_names_(decl_names) {}
virtual void HandleTranslationUnit(ASTContext &context) {
if (ActOnEndOfTranslationUnit) {
CI.getSema().ActOnEndOfTranslationUnit();
}
TraverseDecl(context.getTranslationUnitDecl());
}
virtual bool VisitNamedDecl(NamedDecl *Decl) {
decl_names_.push_back(Decl->getQualifiedNameAsString());
return true;
}
private:
CompilerInstance &CI;
bool ActOnEndOfTranslationUnit;
std::vector<std::string> &decl_names_;
};
};
TEST(ASTFrontendAction, Sanity) {
CompilerInvocation *invocation = new CompilerInvocation;
invocation->getPreprocessorOpts().addRemappedFile(
"test.cc",
MemoryBuffer::getMemBuffer("int main() { float x; }").release());
invocation->getFrontendOpts().Inputs.push_back(FrontendInputFile("test.cc",
IK_CXX));
invocation->getFrontendOpts().ProgramAction = frontend::ParseSyntaxOnly;
invocation->getTargetOpts().Triple = "i386-unknown-linux-gnu";
CompilerInstance compiler;
compiler.setInvocation(invocation);
compiler.createDiagnostics();
TestASTFrontendAction test_action;
ASSERT_TRUE(compiler.ExecuteAction(test_action));
ASSERT_EQ(2U, test_action.decl_names.size());
EXPECT_EQ("main", test_action.decl_names[0]);
EXPECT_EQ("x", test_action.decl_names[1]);
}
TEST(ASTFrontendAction, IncrementalParsing) {
CompilerInvocation *invocation = new CompilerInvocation;
invocation->getPreprocessorOpts().addRemappedFile(
"test.cc",
MemoryBuffer::getMemBuffer("int main() { float x; }").release());
invocation->getFrontendOpts().Inputs.push_back(FrontendInputFile("test.cc",
IK_CXX));
invocation->getFrontendOpts().ProgramAction = frontend::ParseSyntaxOnly;
invocation->getTargetOpts().Triple = "i386-unknown-linux-gnu";
CompilerInstance compiler;
compiler.setInvocation(invocation);
compiler.createDiagnostics();
TestASTFrontendAction test_action(/*enableIncrementalProcessing=*/true);
ASSERT_TRUE(compiler.ExecuteAction(test_action));
ASSERT_EQ(2U, test_action.decl_names.size());
EXPECT_EQ("main", test_action.decl_names[0]);
EXPECT_EQ("x", test_action.decl_names[1]);
}
TEST(ASTFrontendAction, LateTemplateIncrementalParsing) {
CompilerInvocation *invocation = new CompilerInvocation;
invocation->getLangOpts()->CPlusPlus = true;
invocation->getLangOpts()->DelayedTemplateParsing = true;
invocation->getPreprocessorOpts().addRemappedFile(
"test.cc", MemoryBuffer::getMemBuffer(
"template<typename T> struct A { A(T); T data; };\n"
"template<typename T> struct B: public A<T> {\n"
" B();\n"
" B(B const& b): A<T>(b.data) {}\n"
"};\n"
"B<char> c() { return B<char>(); }\n").release());
invocation->getFrontendOpts().Inputs.push_back(FrontendInputFile("test.cc",
IK_CXX));
invocation->getFrontendOpts().ProgramAction = frontend::ParseSyntaxOnly;
invocation->getTargetOpts().Triple = "i386-unknown-linux-gnu";
CompilerInstance compiler;
compiler.setInvocation(invocation);
compiler.createDiagnostics();
TestASTFrontendAction test_action(/*enableIncrementalProcessing=*/true,
/*actOnEndOfTranslationUnit=*/true);
ASSERT_TRUE(compiler.ExecuteAction(test_action));
ASSERT_EQ(13U, test_action.decl_names.size());
EXPECT_EQ("A", test_action.decl_names[0]);
EXPECT_EQ("c", test_action.decl_names[12]);
}
struct TestPPCallbacks : public PPCallbacks {
TestPPCallbacks() : SeenEnd(false) {}
void EndOfMainFile() override { SeenEnd = true; }
bool SeenEnd;
};
class TestPPCallbacksFrontendAction : public PreprocessorFrontendAction {
TestPPCallbacks *Callbacks;
public:
TestPPCallbacksFrontendAction(TestPPCallbacks *C)
: Callbacks(C), SeenEnd(false) {}
void ExecuteAction() override {
Preprocessor &PP = getCompilerInstance().getPreprocessor();
PP.addPPCallbacks(std::unique_ptr<TestPPCallbacks>(Callbacks));
PP.EnterMainSourceFile();
}
void EndSourceFileAction() override { SeenEnd = Callbacks->SeenEnd; }
bool SeenEnd;
};
TEST(PreprocessorFrontendAction, EndSourceFile) {
CompilerInvocation *Invocation = new CompilerInvocation;
Invocation->getPreprocessorOpts().addRemappedFile(
"test.cc",
MemoryBuffer::getMemBuffer("int main() { float x; }").release());
Invocation->getFrontendOpts().Inputs.push_back(
FrontendInputFile("test.cc", IK_CXX));
Invocation->getFrontendOpts().ProgramAction = frontend::ParseSyntaxOnly;
Invocation->getTargetOpts().Triple = "i386-unknown-linux-gnu";
CompilerInstance Compiler;
Compiler.setInvocation(Invocation);
Compiler.createDiagnostics();
TestPPCallbacks *Callbacks = new TestPPCallbacks;
TestPPCallbacksFrontendAction TestAction(Callbacks);
ASSERT_FALSE(Callbacks->SeenEnd);
ASSERT_FALSE(TestAction.SeenEnd);
ASSERT_TRUE(Compiler.ExecuteAction(TestAction));
// Check that EndOfMainFile was called before EndSourceFileAction.
ASSERT_TRUE(TestAction.SeenEnd);
}
} // anonymous namespace
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