diff options
Diffstat (limited to 'examples')
| -rw-r--r-- | examples/ExceptionDemo/ExceptionDemo.cpp | 81 |
1 files changed, 59 insertions, 22 deletions
diff --git a/examples/ExceptionDemo/ExceptionDemo.cpp b/examples/ExceptionDemo/ExceptionDemo.cpp index 9e823168e2..d94a6daab5 100644 --- a/examples/ExceptionDemo/ExceptionDemo.cpp +++ b/examples/ExceptionDemo/ExceptionDemo.cpp @@ -62,8 +62,10 @@ #include "llvm/Support/Dwarf.h" #include "llvm/Support/TargetSelect.h" -// FIXME: See use of UpgradeExceptionHandling(...) below +#ifdef OLD_EXC_SYSTEM +// See use of UpgradeExceptionHandling(...) below #include "llvm/AutoUpgrade.h" +#endif // FIXME: Although all systems tested with (Linux, OS X), do not need this // header file included. A user on ubuntu reported, undefined symbols @@ -185,6 +187,9 @@ static std::vector<std::string> ourTypeInfoNames; static std::map<int, std::string> ourTypeInfoNamesIndex; static llvm::StructType *ourTypeInfoType; +#ifndef OLD_EXC_SYSTEM +static llvm::StructType *ourCaughtResultType; +#endif static llvm::StructType *ourExceptionType; static llvm::StructType *ourUnwindExceptionType; @@ -1219,8 +1224,7 @@ llvm::Function *createCatchWrappedInvokeFunction(llvm::Module &module, builder.SetInsertPoint(unwindResumeBlock); - llvm::Function *resumeOurException = - module.getFunction("_Unwind_Resume"); + llvm::Function *resumeOurException = module.getFunction("_Unwind_Resume"); builder.CreateCall(resumeOurException, builder.CreateLoad(exceptionStorage)); builder.CreateUnreachable(); @@ -1229,18 +1233,41 @@ llvm::Function *createCatchWrappedInvokeFunction(llvm::Module &module, builder.SetInsertPoint(exceptionBlock); - llvm::Function *ehException = module.getFunction("llvm.eh.exception"); + llvm::Function *personality = module.getFunction("ourPersonality"); +#ifndef OLD_EXC_SYSTEM + llvm::LandingPadInst *caughtResult = + builder.CreateLandingPad(ourCaughtResultType, + personality, + numExceptionsToCatch, + "landingPad"); + + caughtResult->setCleanup(true); + + for (unsigned i = 0; i < numExceptionsToCatch; ++i) { + // Set up type infos to be caught + caughtResult->addClause(module.getGlobalVariable( + ourTypeInfoNames[exceptionTypesToCatch[i]])); + } + + llvm::Value *unwindException = builder.CreateExtractValue(caughtResult, 0); + llvm::Value *retTypeInfoIndex = + builder.CreateExtractValue(caughtResult, 1); + + builder.CreateStore(unwindException, exceptionStorage); + builder.CreateStore(ourExceptionThrownState, exceptionCaughtFlag); + +#else + llvm::Function *ehException = module.getFunction("llvm.eh.exception"); + // Retrieve thrown exception llvm::Value *unwindException = builder.CreateCall(ehException); // Store exception and flag builder.CreateStore(unwindException, exceptionStorage); builder.CreateStore(ourExceptionThrownState, exceptionCaughtFlag); - llvm::Function *personality = module.getFunction("ourPersonality"); llvm::Value *functPtr = - builder.CreatePointerCast(personality, - builder.getInt8PtrTy()); + builder.CreatePointerCast(personality, builder.getInt8PtrTy()); args.clear(); args.push_back(unwindException); @@ -1265,6 +1292,7 @@ llvm::Function *createCatchWrappedInvokeFunction(llvm::Module &module, // called either because it nees to cleanup (call finally) or a type // info was found which matched the thrown exception. llvm::Value *retTypeInfoIndex = builder.CreateCall(ehSelector, args); +#endif // Retrieve exception_class member from thrown exception // (_Unwind_Exception instance). This member tells us whether or not @@ -1343,18 +1371,13 @@ llvm::Function *createCatchWrappedInvokeFunction(llvm::Module &module, llvm::Type::getInt32Ty(context), i), catchBlocks[nextTypeToCatch]); } - - // FIXME: This is a hack to get the demo working with the new 3.0 exception - // infrastructure. As this makes the demo no longer a demo, and - // especially not a demo on how to use the llvm exception mechanism, - // this hack will shortly be changed to use the new 3.0 exception - // infrastructure. However for the time being this demo is an - // example on how to use the AutoUpgrade UpgradeExceptionHandling(...) - // function on < 3.0 exception handling code. - // - // Must be run before verifier + +#ifdef OLD_EXC_SYSTEM + // Must be run before verifier UpgradeExceptionHandling(&module); +#endif + llvm::verifyFunction(*ret); fpm.run(*ret); @@ -1661,6 +1684,20 @@ static void createStandardUtilityFunctions(unsigned numTypeInfos, // Create our type info type ourTypeInfoType = llvm::StructType::get(context, TypeArray(builder.getInt32Ty())); + +#ifndef OLD_EXC_SYSTEM + + llvm::Type *caughtResultFieldTypes[] = { + builder.getInt8PtrTy(), + builder.getInt32Ty() + }; + + // Create our landingpad result type + ourCaughtResultType = llvm::StructType::get(context, + TypeArray(caughtResultFieldTypes)); + +#endif + // Create OurException type ourExceptionType = llvm::StructType::get(context, TypeArray(ourTypeInfoType)); @@ -1677,7 +1714,7 @@ static void createStandardUtilityFunctions(unsigned numTypeInfos, // Calculate offset of OurException::unwindException member. ourBaseFromUnwindOffset = ((uintptr_t) &dummyException) - - ((uintptr_t) &(dummyException.unwindException)); + ((uintptr_t) &(dummyException.unwindException)); #ifdef DEBUG fprintf(stderr, @@ -1995,10 +2032,10 @@ int main(int argc, char *argv[]) { // Generate test code using function throwCppException(...) as // the function which throws foreign exceptions. llvm::Function *toRun = - createUnwindExceptionTest(*module, - theBuilder, - fpm, - "throwCppException"); + createUnwindExceptionTest(*module, + theBuilder, + fpm, + "throwCppException"); fprintf(stderr, "\nBegin module dump:\n\n"); |