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//===- unittests/Interpreter/InterpreterExceptionTest.cpp -----------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
//
// Unit tests for Clang's Interpreter library.
//
//===----------------------------------------------------------------------===//
#include "clang/Interpreter/Interpreter.h"
#include "clang/AST/ASTContext.h"
#include "clang/AST/Decl.h"
#include "clang/AST/DeclGroup.h"
#include "clang/Basic/TargetInfo.h"
#include "clang/Basic/Version.h"
#include "clang/Config/config.h"
#include "clang/Frontend/CompilerInstance.h"
#include "clang/Frontend/TextDiagnosticPrinter.h"
#include "llvm/ADT/ArrayRef.h"
#include "llvm/ExecutionEngine/Orc/LLJIT.h"
#include "llvm/Support/ManagedStatic.h"
#include "llvm/Support/TargetSelect.h"
#include "llvm-c/Error.h"
#include "gmock/gmock.h"
#include "gtest/gtest.h"
using namespace clang;
namespace {
using Args = std::vector<const char *>;
static std::unique_ptr<Interpreter>
createInterpreter(const Args &ExtraArgs = {},
DiagnosticConsumer *Client = nullptr) {
Args ClangArgs = {"-Xclang", "-emit-llvm-only"};
ClangArgs.insert(ClangArgs.end(), ExtraArgs.begin(), ExtraArgs.end());
auto CI = cantFail(clang::IncrementalCompilerBuilder::create(ClangArgs));
if (Client)
CI->getDiagnostics().setClient(Client, /*ShouldOwnClient=*/false);
return cantFail(clang::Interpreter::create(std::move(CI)));
}
TEST(InterpreterTest, CatchException) {
llvm::llvm_shutdown_obj Y; // Call llvm_shutdown() on exit.
llvm::InitializeNativeTarget();
llvm::InitializeNativeTargetAsmPrinter();
{
auto J = llvm::orc::LLJITBuilder().create();
if (!J) {
// The platform does not support JITs.
// Using llvm::consumeError will require typeinfo for ErrorInfoBase, we
// can avoid that by going via the C interface.
LLVMConsumeError(llvm::wrap(J.takeError()));
return;
}
}
#define Stringify(s) Stringifyx(s)
#define Stringifyx(s) #s
// We define a custom exception to avoid #include-ing the <exception> header
// which would require this test to know about the libstdc++ location.
// its own header file.
#define CUSTOM_EXCEPTION \
struct custom_exception { \
custom_exception(const char *Msg) : Message(Msg) {} \
const char *Message; \
};
CUSTOM_EXCEPTION;
std::string ExceptionCode = Stringify(CUSTOM_EXCEPTION);
ExceptionCode +=
R"(
extern "C" int printf(const char*, ...);
static void ThrowerAnError(const char* Name) {
throw custom_exception(Name);
}
extern "C" int throw_exception() {
try {
ThrowerAnError("To be caught in JIT");
} catch (const custom_exception& E) {
printf("Caught: '%s'\n", E.Message);
} catch (...) {
printf("Unknown exception\n");
}
ThrowerAnError("To be caught in binary");
return 0;
}
)";
std::unique_ptr<Interpreter> Interp = createInterpreter();
// FIXME: Re-enable the excluded target triples.
const clang::CompilerInstance *CI = Interp->getCompilerInstance();
const llvm::Triple &Triple = CI->getASTContext().getTargetInfo().getTriple();
// AIX is unsupported.
if (Triple.isOSAIX())
return;
// FIXME: ARM fails due to `Not implemented relocation type!`
if (Triple.isARM())
return;
// FIXME: libunwind on darwin is broken, see PR49692.
if (Triple.isOSDarwin() && (Triple.getArch() == llvm::Triple::aarch64 ||
Triple.getArch() == llvm::Triple::aarch64_32))
return;
// Check if platform does not support exceptions.
{
// Force the creation of an incremental executor to call getSymbolAddress.
llvm::cantFail(Interp->ParseAndExecute(""));
auto Sym = Interp->getSymbolAddress("__cxa_throw");
if (!Sym) {
LLVMConsumeError(llvm::wrap(Sym.takeError()));
return;
}
}
llvm::cantFail(Interp->ParseAndExecute(ExceptionCode));
testing::internal::CaptureStdout();
auto ThrowException =
(int (*)())llvm::cantFail(Interp->getSymbolAddress("throw_exception"));
EXPECT_ANY_THROW(ThrowException());
std::string CapturedStdOut = testing::internal::GetCapturedStdout();
EXPECT_EQ(CapturedStdOut, "Caught: 'To be caught in JIT'\n");
}
} // end anonymous namespace
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