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-rw-r--r--examples/ExceptionDemo/ExceptionDemo.cpp209
1 files changed, 116 insertions, 93 deletions
diff --git a/examples/ExceptionDemo/ExceptionDemo.cpp b/examples/ExceptionDemo/ExceptionDemo.cpp
index d94a6daab5..07465bbfb1 100644
--- a/examples/ExceptionDemo/ExceptionDemo.cpp
+++ b/examples/ExceptionDemo/ExceptionDemo.cpp
@@ -901,9 +901,8 @@ void generateStringPrint(llvm::LLVMContext &context,
builder.CreateStore(stringConstant, stringVar);
}
- llvm::Value *cast =
- builder.CreatePointerCast(stringVar,
- builder.getInt8PtrTy());
+ llvm::Value *cast = builder.CreatePointerCast(stringVar,
+ builder.getInt8PtrTy());
builder.CreateCall(printFunct, cast);
}
@@ -945,9 +944,8 @@ void generateIntegerPrint(llvm::LLVMContext &context,
builder.CreateStore(stringConstant, stringVar);
}
- llvm::Value *cast =
- builder.CreateBitCast(stringVar,
- builder.getInt8PtrTy());
+ llvm::Value *cast = builder.CreateBitCast(stringVar,
+ builder.getInt8PtrTy());
builder.CreateCall2(&printFunct, &toPrint, cast);
}
@@ -970,6 +968,9 @@ void generateIntegerPrint(llvm::LLVMContext &context,
/// @param unwindResumeBlock unwind resume block
/// @param exceptionCaughtFlag reference exception caught/thrown status storage
/// @param exceptionStorage reference to exception pointer storage
+#ifndef OLD_EXC_SYSTEM
+/// @param caughtResultStorage reference to landingpad result storage
+#endif
/// @returns newly created block
static llvm::BasicBlock *createFinallyBlock(llvm::LLVMContext &context,
llvm::Module &module,
@@ -980,27 +981,42 @@ static llvm::BasicBlock *createFinallyBlock(llvm::LLVMContext &context,
llvm::BasicBlock &terminatorBlock,
llvm::BasicBlock &unwindResumeBlock,
llvm::Value **exceptionCaughtFlag,
- llvm::Value **exceptionStorage) {
+ llvm::Value **exceptionStorage
+#ifndef OLD_EXC_SYSTEM
+ ,llvm::Value **caughtResultStorage
+#endif
+ ) {
assert(exceptionCaughtFlag &&
"ExceptionDemo::createFinallyBlock(...):exceptionCaughtFlag "
"is NULL");
assert(exceptionStorage &&
"ExceptionDemo::createFinallyBlock(...):exceptionStorage "
"is NULL");
+
+#ifndef OLD_EXC_SYSTEM
+ assert(caughtResultStorage &&
+ "ExceptionDemo::createFinallyBlock(...):caughtResultStorage "
+ "is NULL");
+#endif
- *exceptionCaughtFlag =
- createEntryBlockAlloca(toAddTo,
- "exceptionCaught",
- ourExceptionNotThrownState->getType(),
- ourExceptionNotThrownState);
+ *exceptionCaughtFlag = createEntryBlockAlloca(toAddTo,
+ "exceptionCaught",
+ ourExceptionNotThrownState->getType(),
+ ourExceptionNotThrownState);
llvm::PointerType *exceptionStorageType = builder.getInt8PtrTy();
- *exceptionStorage =
- createEntryBlockAlloca(toAddTo,
- "exceptionStorage",
- exceptionStorageType,
- llvm::ConstantPointerNull::get(
- exceptionStorageType));
+ *exceptionStorage = createEntryBlockAlloca(toAddTo,
+ "exceptionStorage",
+ exceptionStorageType,
+ llvm::ConstantPointerNull::get(
+ exceptionStorageType));
+#ifndef OLD_EXC_SYSTEM
+ *caughtResultStorage = createEntryBlockAlloca(toAddTo,
+ "caughtResultStorage",
+ ourCaughtResultType,
+ llvm::ConstantAggregateZero::get(
+ ourCaughtResultType));
+#endif
llvm::BasicBlock *ret = llvm::BasicBlock::Create(context,
blockName,
@@ -1017,10 +1033,10 @@ static llvm::BasicBlock *createFinallyBlock(llvm::LLVMContext &context,
bufferToPrint.str(),
USE_GLOBAL_STR_CONSTS);
- llvm::SwitchInst *theSwitch =
- builder.CreateSwitch(builder.CreateLoad(*exceptionCaughtFlag),
- &terminatorBlock,
- 2);
+ llvm::SwitchInst *theSwitch = builder.CreateSwitch(builder.CreateLoad(
+ *exceptionCaughtFlag),
+ &terminatorBlock,
+ 2);
theSwitch->addCase(ourExceptionCaughtState, &terminatorBlock);
theSwitch->addCase(ourExceptionThrownState, &unwindResumeBlock);
@@ -1128,29 +1144,35 @@ llvm::Function *createCatchWrappedInvokeFunction(llvm::Module &module,
"normal",
ret);
// Unwind block for invoke
- llvm::BasicBlock *exceptionBlock =
- llvm::BasicBlock::Create(context, "exception", ret);
+ llvm::BasicBlock *exceptionBlock = llvm::BasicBlock::Create(context,
+ "exception",
+ ret);
// Block which routes exception to correct catch handler block
- llvm::BasicBlock *exceptionRouteBlock =
- llvm::BasicBlock::Create(context, "exceptionRoute", ret);
+ llvm::BasicBlock *exceptionRouteBlock = llvm::BasicBlock::Create(context,
+ "exceptionRoute",
+ ret);
// Foreign exception handler
- llvm::BasicBlock *externalExceptionBlock =
- llvm::BasicBlock::Create(context, "externalException", ret);
+ llvm::BasicBlock *externalExceptionBlock = llvm::BasicBlock::Create(context,
+ "externalException",
+ ret);
// Block which calls _Unwind_Resume
- llvm::BasicBlock *unwindResumeBlock =
- llvm::BasicBlock::Create(context, "unwindResume", ret);
+ llvm::BasicBlock *unwindResumeBlock = llvm::BasicBlock::Create(context,
+ "unwindResume",
+ ret);
// Clean up block which delete exception if needed
- llvm::BasicBlock *endBlock =
- llvm::BasicBlock::Create(context, "end", ret);
+ llvm::BasicBlock *endBlock = llvm::BasicBlock::Create(context, "end", ret);
std::string nextName;
std::vector<llvm::BasicBlock*> catchBlocks(numExceptionsToCatch);
llvm::Value *exceptionCaughtFlag = NULL;
llvm::Value *exceptionStorage = NULL;
+#ifndef OLD_EXC_SYSTEM
+ llvm::Value *caughtResultStorage = NULL;
+#endif
// Finally block which will branch to unwindResumeBlock if
// exception is not caught. Initializes/allocates stack locations.
@@ -1163,7 +1185,11 @@ llvm::Function *createCatchWrappedInvokeFunction(llvm::Module &module,
*endBlock,
*unwindResumeBlock,
&exceptionCaughtFlag,
- &exceptionStorage);
+ &exceptionStorage
+#ifndef OLD_EXC_SYSTEM
+ ,&caughtResultStorage
+#endif
+ );
for (unsigned i = 0; i < numExceptionsToCatch; ++i) {
nextName = ourTypeInfoNames[exceptionTypesToCatch[i]];
@@ -1199,8 +1225,7 @@ llvm::Function *createCatchWrappedInvokeFunction(llvm::Module &module,
builder,
"Gen: In end block: exiting in " + ourId + ".\n",
USE_GLOBAL_STR_CONSTS);
- llvm::Function *deleteOurException =
- module.getFunction("deleteOurException");
+ llvm::Function *deleteOurException = module.getFunction("deleteOurException");
// Note: function handles NULL exceptions
builder.CreateCall(deleteOurException,
@@ -1224,10 +1249,15 @@ llvm::Function *createCatchWrappedInvokeFunction(llvm::Module &module,
builder.SetInsertPoint(unwindResumeBlock);
+
+#ifndef OLD_EXC_SYSTEM
+ builder.CreateResume(builder.CreateLoad(caughtResultStorage));
+#else
llvm::Function *resumeOurException = module.getFunction("_Unwind_Resume");
builder.CreateCall(resumeOurException,
builder.CreateLoad(exceptionStorage));
builder.CreateUnreachable();
+#endif
// Exception Block
@@ -1251,12 +1281,14 @@ llvm::Function *createCatchWrappedInvokeFunction(llvm::Module &module,
}
llvm::Value *unwindException = builder.CreateExtractValue(caughtResult, 0);
- llvm::Value *retTypeInfoIndex =
- builder.CreateExtractValue(caughtResult, 1);
+ llvm::Value *retTypeInfoIndex = builder.CreateExtractValue(caughtResult, 1);
+ // FIXME: Redundant storage which, beyond utilizing value of
+ // caughtResultStore for unwindException storage, may be alleviated
+ // alltogether with a block rearrangement
+ builder.CreateStore(caughtResult, caughtResultStorage);
builder.CreateStore(unwindException, exceptionStorage);
builder.CreateStore(ourExceptionThrownState, exceptionCaughtFlag);
-
#else
llvm::Function *ehException = module.getFunction("llvm.eh.exception");
@@ -1266,8 +1298,8 @@ llvm::Function *createCatchWrappedInvokeFunction(llvm::Module &module,
// Store exception and flag
builder.CreateStore(unwindException, exceptionStorage);
builder.CreateStore(ourExceptionThrownState, exceptionCaughtFlag);
- llvm::Value *functPtr =
- builder.CreatePointerCast(personality, builder.getInt8PtrTy());
+ llvm::Value *functPtr = builder.CreatePointerCast(personality,
+ builder.getInt8PtrTy());
args.clear();
args.push_back(unwindException);
@@ -1332,10 +1364,10 @@ llvm::Function *createCatchWrappedInvokeFunction(llvm::Module &module,
// (OurException instance).
//
// Note: ourBaseFromUnwindOffset is usually negative
- llvm::Value *typeInfoThrown =
- builder.CreatePointerCast(builder.CreateConstGEP1_64(unwindException,
+ llvm::Value *typeInfoThrown = builder.CreatePointerCast(
+ builder.CreateConstGEP1_64(unwindException,
ourBaseFromUnwindOffset),
- ourExceptionType->getPointerTo());
+ ourExceptionType->getPointerTo());
// Retrieve thrown exception type info type
//
@@ -1358,10 +1390,9 @@ llvm::Function *createCatchWrappedInvokeFunction(llvm::Module &module,
USE_GLOBAL_STR_CONSTS);
// Route to matched type info catch block or run cleanup finally block
- llvm::SwitchInst *switchToCatchBlock =
- builder.CreateSwitch(retTypeInfoIndex,
- finallyBlock,
- numExceptionsToCatch);
+ llvm::SwitchInst *switchToCatchBlock = builder.CreateSwitch(retTypeInfoIndex,
+ finallyBlock,
+ numExceptionsToCatch);
unsigned nextTypeToCatch;
@@ -1428,15 +1459,13 @@ llvm::Function *createThrowExceptionFunction(llvm::Module &module,
"entry",
ret);
// Throws a foreign exception
- llvm::BasicBlock *nativeThrowBlock =
- llvm::BasicBlock::Create(context,
- "nativeThrow",
- ret);
+ llvm::BasicBlock *nativeThrowBlock = llvm::BasicBlock::Create(context,
+ "nativeThrow",
+ ret);
// Throws one of our Exceptions
- llvm::BasicBlock *generatedThrowBlock =
- llvm::BasicBlock::Create(context,
- "generatedThrow",
- ret);
+ llvm::BasicBlock *generatedThrowBlock = llvm::BasicBlock::Create(context,
+ "generatedThrow",
+ ret);
// Retrieved runtime type info type to throw
llvm::Value *exceptionType = namedValues["exceptTypeToThrow"];
@@ -1478,15 +1507,13 @@ llvm::Function *createThrowExceptionFunction(llvm::Module &module,
builder.SetInsertPoint(generatedThrowBlock);
- llvm::Function *createOurException =
- module.getFunction("createOurException");
- llvm::Function *raiseOurException =
- module.getFunction("_Unwind_RaiseException");
+ llvm::Function *createOurException = module.getFunction("createOurException");
+ llvm::Function *raiseOurException = module.getFunction(
+ "_Unwind_RaiseException");
// Creates exception to throw with runtime type info type.
- llvm::Value *exception =
- builder.CreateCall(createOurException,
- namedValues["exceptTypeToThrow"]);
+ llvm::Value *exception = builder.CreateCall(createOurException,
+ namedValues["exceptTypeToThrow"]);
// Throw generated Exception
builder.CreateCall(raiseOurException, exception);
@@ -1534,32 +1561,29 @@ llvm::Function *createUnwindExceptionTest(llvm::Module &module,
createStandardUtilityFunctions(numTypeInfos,
module,
builder);
- llvm::Function *nativeThrowFunct =
- module.getFunction(nativeThrowFunctName);
+ llvm::Function *nativeThrowFunct = module.getFunction(nativeThrowFunctName);
// Create exception throw function using the value ~0 to cause
// foreign exceptions to be thrown.
- llvm::Function *throwFunct =
- createThrowExceptionFunction(module,
- builder,
- fpm,
- "throwFunct",
- ~0,
- *nativeThrowFunct);
+ llvm::Function *throwFunct = createThrowExceptionFunction(module,
+ builder,
+ fpm,
+ "throwFunct",
+ ~0,
+ *nativeThrowFunct);
// Inner function will catch even type infos
unsigned innerExceptionTypesToCatch[] = {6, 2, 4};
size_t numExceptionTypesToCatch = sizeof(innerExceptionTypesToCatch) /
- sizeof(unsigned);
+ sizeof(unsigned);
// Generate inner function.
- llvm::Function *innerCatchFunct =
- createCatchWrappedInvokeFunction(module,
- builder,
- fpm,
- *throwFunct,
- "innerCatchFunct",
- numExceptionTypesToCatch,
- innerExceptionTypesToCatch);
+ llvm::Function *innerCatchFunct = createCatchWrappedInvokeFunction(module,
+ builder,
+ fpm,
+ *throwFunct,
+ "innerCatchFunct",
+ numExceptionTypesToCatch,
+ innerExceptionTypesToCatch);
// Outer function will catch odd type infos
unsigned outerExceptionTypesToCatch[] = {3, 1, 5};
@@ -1567,14 +1591,13 @@ llvm::Function *createUnwindExceptionTest(llvm::Module &module,
sizeof(unsigned);
// Generate outer function
- llvm::Function *outerCatchFunct =
- createCatchWrappedInvokeFunction(module,
- builder,
- fpm,
- *innerCatchFunct,
- "outerCatchFunct",
- numExceptionTypesToCatch,
- outerExceptionTypesToCatch);
+ llvm::Function *outerCatchFunct = createCatchWrappedInvokeFunction(module,
+ builder,
+ fpm,
+ *innerCatchFunct,
+ "outerCatchFunct",
+ numExceptionTypesToCatch,
+ outerExceptionTypesToCatch);
// Return outer function to run
return(outerCatchFunct);
@@ -1673,17 +1696,17 @@ static void createStandardUtilityFunctions(unsigned numTypeInfos,
// Setup exception catch state
ourExceptionNotThrownState =
- llvm::ConstantInt::get(llvm::Type::getInt8Ty(context), 0),
+ llvm::ConstantInt::get(llvm::Type::getInt8Ty(context), 0),
ourExceptionThrownState =
- llvm::ConstantInt::get(llvm::Type::getInt8Ty(context), 1),
+ llvm::ConstantInt::get(llvm::Type::getInt8Ty(context), 1),
ourExceptionCaughtState =
- llvm::ConstantInt::get(llvm::Type::getInt8Ty(context), 2),
+ llvm::ConstantInt::get(llvm::Type::getInt8Ty(context), 2),
// Create our type info type
ourTypeInfoType = llvm::StructType::get(context,
- TypeArray(builder.getInt32Ty()));
+ TypeArray(builder.getInt32Ty()));
#ifndef OLD_EXC_SYSTEM
@@ -1714,7 +1737,7 @@ 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,
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2024-11-21 20:43:43 +0000