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#include "TestingSupport.h"
#include "clang/AST/ASTContext.h"
#include "clang/ASTMatchers/ASTMatchFinder.h"
#include "clang/ASTMatchers/ASTMatchers.h"
#include "clang/Analysis/FlowSensitive/NoopAnalysis.h"
#include "clang/Tooling/Tooling.h"
#include "llvm/Testing/ADT/StringMapEntry.h"
#include "llvm/Testing/Support/Error.h"
#include "gmock/gmock.h"
#include "gtest/gtest.h"
using namespace clang;
using namespace dataflow;
namespace {
using ::clang::ast_matchers::functionDecl;
using ::clang::ast_matchers::hasAnyName;
using ::clang::ast_matchers::hasName;
using ::clang::ast_matchers::isDefinition;
using ::clang::dataflow::test::AnalysisInputs;
using ::clang::dataflow::test::AnalysisOutputs;
using ::clang::dataflow::test::checkDataflow;
using ::llvm::IsStringMapEntry;
using ::testing::_;
using ::testing::IsEmpty;
using ::testing::UnorderedElementsAre;
template <typename T>
const FunctionDecl *findTargetFunc(ASTContext &Context, T FunctionMatcher) {
auto TargetMatcher =
functionDecl(FunctionMatcher, isDefinition()).bind("target");
for (const auto &Node : ast_matchers::match(TargetMatcher, Context)) {
const auto *Func = Node.template getNodeAs<FunctionDecl>("target");
if (Func == nullptr)
continue;
if (Func->isTemplated())
continue;
return Func;
}
return nullptr;
}
void runTest(
llvm::StringRef Code, llvm::StringRef TargetName,
std::function<void(const llvm::DenseMap<const Stmt *, std::string> &)>
RunChecks) {
llvm::Annotations AnnotatedCode(Code);
auto Unit = tooling::buildASTFromCodeWithArgs(
AnnotatedCode.code(), {"-fsyntax-only", "-std=c++17"});
auto &Context = Unit->getASTContext();
const FunctionDecl *Func = findTargetFunc(Context, hasName(TargetName));
ASSERT_NE(Func, nullptr);
llvm::Expected<llvm::DenseMap<const Stmt *, std::string>> Mapping =
test::buildStatementToAnnotationMapping(Func, AnnotatedCode);
ASSERT_TRUE(static_cast<bool>(Mapping));
RunChecks(Mapping.get());
}
TEST(BuildStatementToAnnotationMappingTest, ReturnStmt) {
runTest(R"(
int target() {
return 42;
/*[[ok]]*/
}
)",
"target",
[](const llvm::DenseMap<const Stmt *, std::string> &Annotations) {
ASSERT_EQ(Annotations.size(), static_cast<unsigned int>(1));
EXPECT_TRUE(isa<ReturnStmt>(Annotations.begin()->first));
EXPECT_EQ(Annotations.begin()->second, "ok");
});
}
void checkDataflow(
llvm::StringRef Code,
ast_matchers::internal::Matcher<FunctionDecl> TargetFuncMatcher,
std::function<
void(const llvm::StringMap<DataflowAnalysisState<NoopLattice>> &,
const AnalysisOutputs &)>
Expectations) {
ASSERT_THAT_ERROR(checkDataflow<NoopAnalysis>(
AnalysisInputs<NoopAnalysis>(
Code, std::move(TargetFuncMatcher),
[](ASTContext &Context, Environment &) {
return NoopAnalysis(
Context,
// Don't apply builtin transfer function.
DataflowAnalysisOptions{std::nullopt});
})
.withASTBuildArgs({"-fsyntax-only", "-std=c++17"}),
/*VerifyResults=*/std::move(Expectations)),
llvm::Succeeded());
}
TEST(ProgramPointAnnotations, NoAnnotations) {
::testing::MockFunction<void(
const llvm::StringMap<DataflowAnalysisState<NoopLattice>> &,
const AnalysisOutputs &)>
Expectations;
EXPECT_CALL(Expectations, Call(IsEmpty(), _)).Times(1);
checkDataflow("void target() {}", hasName("target"),
Expectations.AsStdFunction());
}
TEST(ProgramPointAnnotations, NoAnnotationsDifferentTarget) {
::testing::MockFunction<void(
const llvm::StringMap<DataflowAnalysisState<NoopLattice>> &,
const AnalysisOutputs &)>
Expectations;
EXPECT_CALL(Expectations, Call(IsEmpty(), _)).Times(1);
checkDataflow("void target() {}", hasName("target"),
Expectations.AsStdFunction());
}
TEST(ProgramPointAnnotations, WithProgramPoint) {
::testing::MockFunction<void(
const llvm::StringMap<DataflowAnalysisState<NoopLattice>> &,
const AnalysisOutputs &)>
Expectations;
EXPECT_CALL(
Expectations,
Call(UnorderedElementsAre(IsStringMapEntry("program-point", _)), _))
.Times(1);
checkDataflow(R"cc(void target() {
int n;
// [[program-point]]
})cc",
hasName("target"), Expectations.AsStdFunction());
}
TEST(ProgramPointAnnotations, MultipleProgramPoints) {
::testing::MockFunction<void(
const llvm::StringMap<DataflowAnalysisState<NoopLattice>> &,
const AnalysisOutputs &)>
Expectations;
EXPECT_CALL(Expectations,
Call(UnorderedElementsAre(IsStringMapEntry("program-point-1", _),
IsStringMapEntry("program-point-2", _)),
_))
.Times(1);
checkDataflow(R"cc(void target(bool b) {
if (b) {
int n;
// [[program-point-1]]
} else {
int m;
// [[program-point-2]]
}
})cc",
hasName("target"), Expectations.AsStdFunction());
}
TEST(ProgramPointAnnotations, MultipleFunctionsMultipleProgramPoints) {
::testing::MockFunction<void(
const llvm::StringMap<DataflowAnalysisState<NoopLattice>> &,
const AnalysisOutputs &)>
Expectations;
EXPECT_CALL(Expectations, Call(UnorderedElementsAre(
IsStringMapEntry("program-point-1a", _),
IsStringMapEntry("program-point-1b", _)),
_))
.Times(1);
EXPECT_CALL(Expectations, Call(UnorderedElementsAre(
IsStringMapEntry("program-point-2a", _),
IsStringMapEntry("program-point-2b", _)),
_))
.Times(1);
checkDataflow(
R"cc(
void target1(bool b) {
if (b) {
int n;
// [[program-point-1a]]
} else {
int m;
// [[program-point-1b]]
}
}
void target2(bool b) {
if (b) {
int n;
// [[program-point-2a]]
} else {
int m;
// [[program-point-2b]]
}
}
)cc",
functionDecl(hasAnyName("target1", "target2")),
Expectations.AsStdFunction());
}
} // namespace
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