// Demo program which implements an example LLVM exception implementation, and
// shows several test cases including the handling of foreign exceptions.
// It is run with type info types arguments to throw. A test will
-// be run for each given type info type. While type info types with the value
+// be run for each given type info type. While type info types with the value
// of -1 will trigger a foreign C++ exception to be thrown; type info types
-// <= 6 and >= 1 will cause the associated generated exceptions to be thrown
+// <= 6 and >= 1 will cause the associated generated exceptions to be thrown
// and caught by generated test functions; and type info types > 6
// will result in exceptions which pass through to the test harness. All other
// type info types are not supported and could cause a crash. In all cases,
-// the "finally" blocks of every generated test functions will executed
+// the "finally" blocks of every generated test functions will executed
// regardless of whether or not that test function ignores or catches the
// thrown exception.
//
// ExceptionDemo
//
// causes a usage to be printed to stderr
-//
+//
// ExceptionDemo 2 3 7 -1
//
// results in the following cases:
-// - Value 2 causes an exception with a type info type of 2 to be
+// - Value 2 causes an exception with a type info type of 2 to be
// thrown and caught by an inner generated test function.
-// - Value 3 causes an exception with a type info type of 3 to be
+// - Value 3 causes an exception with a type info type of 3 to be
// thrown and caught by an outer generated test function.
-// - Value 7 causes an exception with a type info type of 7 to be
+// - Value 7 causes an exception with a type info type of 7 to be
// thrown and NOT be caught by any generated function.
// - Value -1 causes a foreign C++ exception to be thrown and not be
// caught by any generated function
//
// Cases -1 and 7 are caught by a C++ test harness where the validity of
-// of a C++ catch(...) clause catching a generated exception with a
-// type info type of 7 is questionable.
+// of a C++ catch(...) clause catching a generated exception with a
+// type info type of 7 is explained by: example in rules 1.6.4 in
+// http://mentorembedded.github.com/cxx-abi/abi-eh.html (v1.22)
//
-// This code uses code from the llvm compiler-rt project and the llvm
+// This code uses code from the llvm compiler-rt project and the llvm
// Kaleidoscope project.
//
//===----------------------------------------------------------------------===//
-#include "llvm/LLVMContext.h"
-#include "llvm/DerivedTypes.h"
-#include "llvm/ExecutionEngine/ExecutionEngine.h"
-#include "llvm/ExecutionEngine/JIT.h"
-#include "llvm/Module.h"
-#include "llvm/PassManager.h"
-#include "llvm/Intrinsics.h"
-#include "llvm/Analysis/Verifier.h"
-#include "llvm/Target/TargetData.h"
-#include "llvm/Target/TargetSelect.h"
+#include "llvm/ADT/STLExtras.h"
+#include "llvm/IR/Verifier.h"
+#include "llvm/ExecutionEngine/MCJIT.h"
+#include "llvm/ExecutionEngine/SectionMemoryManager.h"
+#include "llvm/IR/DataLayout.h"
+#include "llvm/IR/DerivedTypes.h"
+#include "llvm/IR/IRBuilder.h"
+#include "llvm/IR/Intrinsics.h"
+#include "llvm/IR/LLVMContext.h"
+#include "llvm/IR/LegacyPassManager.h"
+#include "llvm/IR/Module.h"
+#include "llvm/Support/Dwarf.h"
+#include "llvm/Support/TargetSelect.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Transforms/Scalar.h"
-#include "llvm/Support/IRBuilder.h"
-#include "llvm/Support/Dwarf.h"
-// FIXME: Although all systems tested with (Linux, OS X), do not need this
-// header file included. A user on ubuntu reported, undefined symbols
+// FIXME: Although all systems tested with (Linux, OS X), do not need this
+// header file included. A user on ubuntu reported, undefined symbols
// for stderr, and fprintf, and the addition of this include fixed the
-// issue for them. Given that LLVM's best practices include the goal
-// of reducing the number of redundant header files included, the
-// correct solution would be to find out why these symbols are not
+// issue for them. Given that LLVM's best practices include the goal
+// of reducing the number of redundant header files included, the
+// correct solution would be to find out why these symbols are not
// defined for the system in question, and fix the issue by finding out
// which LLVM header file, if any, would include these symbols.
#include <cstdio>
#define USE_GLOBAL_STR_CONSTS true
#endif
-// System C++ ABI unwind types from:
-// http://refspecs.freestandards.org/abi-eh-1.21.html
+// System C++ ABI unwind types from:
+// http://mentorembedded.github.com/cxx-abi/abi-eh.html (v1.22)
extern "C" {
-
+
typedef enum {
_URC_NO_REASON = 0,
_URC_FOREIGN_EXCEPTION_CAUGHT = 1,
_URC_INSTALL_CONTEXT = 7,
_URC_CONTINUE_UNWIND = 8
} _Unwind_Reason_Code;
-
+
typedef enum {
_UA_SEARCH_PHASE = 1,
_UA_CLEANUP_PHASE = 2,
_UA_FORCE_UNWIND = 8,
_UA_END_OF_STACK = 16
} _Unwind_Action;
-
+
struct _Unwind_Exception;
-
+
typedef void (*_Unwind_Exception_Cleanup_Fn) (_Unwind_Reason_Code,
struct _Unwind_Exception *);
-
+
struct _Unwind_Exception {
uint64_t exception_class;
_Unwind_Exception_Cleanup_Fn exception_cleanup;
-
- uintptr_t private_1;
- uintptr_t private_2;
-
+
+ uintptr_t private_1;
+ uintptr_t private_2;
+
// @@@ The IA-64 ABI says that this structure must be double-word aligned.
- // Taking that literally does not make much sense generically. Instead
+ // Taking that literally does not make much sense generically. Instead
// we provide the maximum alignment required by any type for the machine.
} __attribute__((__aligned__));
-
+
struct _Unwind_Context;
typedef struct _Unwind_Context *_Unwind_Context_t;
-
+
extern const uint8_t *_Unwind_GetLanguageSpecificData (_Unwind_Context_t c);
extern uintptr_t _Unwind_GetGR (_Unwind_Context_t c, int i);
extern void _Unwind_SetGR (_Unwind_Context_t c, int i, uintptr_t n);
extern void _Unwind_SetIP (_Unwind_Context_t, uintptr_t new_value);
extern uintptr_t _Unwind_GetIP (_Unwind_Context_t context);
extern uintptr_t _Unwind_GetRegionStart (_Unwind_Context_t context);
-
+
} // extern "C"
//
/// This is our Exception class which relies on a negative offset to calculate
/// pointers to its instances from pointers to its unwindException member.
-///
+///
/// Note: The above unwind.h defines struct _Unwind_Exception to be aligned
/// on a double word boundary. This is necessary to match the standard:
-/// http://refspecs.freestandards.org/abi-eh-1.21.html
+/// http://mentorembedded.github.com/cxx-abi/abi-eh.html
struct OurBaseException_t {
struct OurExceptionType_t type;
-
+
// Note: This is properly aligned in unwind.h
struct _Unwind_Exception unwindException;
};
typedef struct _Unwind_Exception OurUnwindException;
//
-// Various globals used to support typeinfo and generatted exceptions in
+// Various globals used to support typeinfo and generatted exceptions in
// general
//
int64_t ourBaseFromUnwindOffset;
-const unsigned char ourBaseExcpClassChars[] =
+const unsigned char ourBaseExcpClassChars[] =
{'o', 'b', 'j', '\0', 'b', 'a', 's', '\0'};
static std::map<int, std::string> ourTypeInfoNamesIndex;
static llvm::StructType *ourTypeInfoType;
+static llvm::StructType *ourCaughtResultType;
static llvm::StructType *ourExceptionType;
static llvm::StructType *ourUnwindExceptionType;
static llvm::ConstantInt *ourExceptionCaughtState;
typedef std::vector<std::string> ArgNames;
-typedef std::vector<const llvm::Type*> ArgTypes;
+typedef std::vector<llvm::Type*> ArgTypes;
//
// Code Generation Utilities
/// @param retType function return type
/// @param theArgTypes function's ordered argument types
/// @param theArgNames function's ordered arguments needed if use of this
-/// function corresponds to a function definition. Use empty
+/// function corresponds to a function definition. Use empty
/// aggregate for function declarations.
/// @param functName function name
/// @param linkage function linkage
/// @param isVarArg function uses vararg arguments
/// @returns function instance
llvm::Function *createFunction(llvm::Module &module,
- const llvm::Type *retType,
+ llvm::Type *retType,
const ArgTypes &theArgTypes,
const ArgNames &theArgNames,
const std::string &functName,
llvm::Function::Create(functType, linkage, functName, &module);
if (!ret || declarationOnly)
return(ret);
-
+
namedValues.clear();
- unsigned i = 0;
+ unsigned i = 0;
for (llvm::Function::arg_iterator argIndex = ret->arg_begin();
i != theArgNames.size();
++argIndex, ++i) {
-
+
argIndex->setName(theArgNames[i]);
namedValues[theArgNames[i]] = argIndex;
}
-
+
return(ret);
}
/// @returns AllocaInst instance
static llvm::AllocaInst *createEntryBlockAlloca(llvm::Function &function,
const std::string &varName,
- const llvm::Type *type,
+ llvm::Type *type,
llvm::Constant *initWith = 0) {
- llvm::BasicBlock &block = function.getEntryBlock();
+ llvm::BasicBlock &block = function.getEntryBlock();
llvm::IRBuilder<> tmp(&block, block.begin());
llvm::AllocaInst *ret = tmp.CreateAlloca(type, 0, varName.c_str());
-
- if (initWith)
+
+ if (initWith)
tmp.CreateStore(initWith, ret);
-
+
return(ret);
}
//
//
-// Runtime C Library functions
+// Runtime C Library functions
//
// Note: using an extern "C" block so that static functions can be used
// Note: Better ways to decide on bit width
//
/// Prints a 32 bit number, according to the format, to stderr.
-/// @param intToPrint integer to print
+/// @param intToPrint integer to print
/// @param format printf like format to use when printing
void print32Int(int intToPrint, const char *format) {
if (format) {
// Note: Better ways to decide on bit width
//
/// Prints a 64 bit number, according to the format, to stderr.
-/// @param intToPrint integer to print
+/// @param intToPrint integer to print
/// @param format printf like format to use when printing
void print64Int(long int intToPrint, const char *format) {
if (format) {
fprintf(stderr,
"deleteOurException(...).\n");
#endif
-
+
if (expToDelete &&
(expToDelete->exception_class == ourBaseExceptionClass)) {
-
+
free(((char*) expToDelete) + ourBaseFromUnwindOffset);
}
}
-/// This function is the struct _Unwind_Exception API mandated delete function
-/// used by foreign exception handlers when deleting our exception
+/// This function is the struct _Unwind_Exception API mandated delete function
+/// used by foreign exception handlers when deleting our exception
/// (OurException), instances.
-/// @param reason @link http://refspecs.freestandards.org/abi-eh-1.21.html
+/// @param reason See @link http://mentorembedded.github.com/cxx-abi/abi-eh.html
/// @unlink
/// @param expToDelete exception instance to delete
void deleteFromUnwindOurException(_Unwind_Reason_Code reason,
fprintf(stderr,
"deleteFromUnwindOurException(...).\n");
#endif
-
+
deleteOurException(expToDelete);
}
(ret->type).type = type;
(ret->unwindException).exception_class = ourBaseExceptionClass;
(ret->unwindException).exception_cleanup = deleteFromUnwindOurException;
-
+
return(&(ret->unwindException));
}
-/// Read a uleb128 encoded value and advance pointer
-/// See Variable Length Data in:
+/// Read a uleb128 encoded value and advance pointer
+/// See Variable Length Data in:
/// @link http://dwarfstd.org/Dwarf3.pdf @unlink
/// @param data reference variable holding memory pointer to decode from
/// @returns decoded value
uintptr_t shift = 0;
unsigned char byte;
const uint8_t *p = *data;
-
+
do {
byte = *p++;
result |= (byte & 0x7f) << shift;
shift += 7;
- }
+ }
while (byte & 0x80);
-
+
*data = p;
-
+
return result;
}
-/// Read a sleb128 encoded value and advance pointer
-/// See Variable Length Data in:
+/// Read a sleb128 encoded value and advance pointer
+/// See Variable Length Data in:
/// @link http://dwarfstd.org/Dwarf3.pdf @unlink
/// @param data reference variable holding memory pointer to decode from
/// @returns decoded value
uintptr_t shift = 0;
unsigned char byte;
const uint8_t *p = *data;
-
+
do {
byte = *p++;
result |= (byte & 0x7f) << shift;
shift += 7;
- }
+ }
while (byte & 0x80);
-
+
*data = p;
-
+
if ((byte & 0x40) && (shift < (sizeof(result) << 3))) {
result |= (~0 << shift);
}
-
+
return result;
}
+unsigned getEncodingSize(uint8_t Encoding) {
+ if (Encoding == llvm::dwarf::DW_EH_PE_omit)
+ return 0;
+
+ switch (Encoding & 0x0F) {
+ case llvm::dwarf::DW_EH_PE_absptr:
+ return sizeof(uintptr_t);
+ case llvm::dwarf::DW_EH_PE_udata2:
+ return sizeof(uint16_t);
+ case llvm::dwarf::DW_EH_PE_udata4:
+ return sizeof(uint32_t);
+ case llvm::dwarf::DW_EH_PE_udata8:
+ return sizeof(uint64_t);
+ case llvm::dwarf::DW_EH_PE_sdata2:
+ return sizeof(int16_t);
+ case llvm::dwarf::DW_EH_PE_sdata4:
+ return sizeof(int32_t);
+ case llvm::dwarf::DW_EH_PE_sdata8:
+ return sizeof(int64_t);
+ default:
+ // not supported
+ abort();
+ }
+}
-/// Read a pointer encoded value and advance pointer
-/// See Variable Length Data in:
+/// Read a pointer encoded value and advance pointer
+/// See Variable Length Data in:
/// @link http://dwarfstd.org/Dwarf3.pdf @unlink
/// @param data reference variable holding memory pointer to decode from
/// @param encoding dwarf encoding type
static uintptr_t readEncodedPointer(const uint8_t **data, uint8_t encoding) {
uintptr_t result = 0;
const uint8_t *p = *data;
-
- if (encoding == llvm::dwarf::DW_EH_PE_omit)
+
+ if (encoding == llvm::dwarf::DW_EH_PE_omit)
return(result);
-
- // first get value
+
+ // first get value
switch (encoding & 0x0F) {
case llvm::dwarf::DW_EH_PE_absptr:
result = *((uintptr_t*)p);
p += sizeof(int64_t);
break;
default:
- // not supported
+ // not supported
abort();
break;
}
-
- // then add relative offset
+
+ // then add relative offset
switch (encoding & 0x70) {
case llvm::dwarf::DW_EH_PE_absptr:
- // do nothing
+ // do nothing
break;
case llvm::dwarf::DW_EH_PE_pcrel:
result += (uintptr_t)(*data);
case llvm::dwarf::DW_EH_PE_funcrel:
case llvm::dwarf::DW_EH_PE_aligned:
default:
- // not supported
+ // not supported
abort();
break;
}
-
- // then apply indirection
+
+ // then apply indirection
if (encoding & llvm::dwarf::DW_EH_PE_indirect) {
result = *((uintptr_t*)result);
}
-
+
*data = p;
-
+
return result;
}
-/// Deals with Dwarf actions matching our type infos
-/// (OurExceptionType_t instances). Returns whether or not a dwarf emitted
-/// action matches the supplied exception type. If such a match succeeds,
-/// the resultAction argument will be set with > 0 index value. Only
-/// corresponding llvm.eh.selector type info arguments, cleanup arguments
+/// Deals with Dwarf actions matching our type infos
+/// (OurExceptionType_t instances). Returns whether or not a dwarf emitted
+/// action matches the supplied exception type. If such a match succeeds,
+/// the resultAction argument will be set with > 0 index value. Only
+/// corresponding llvm.eh.selector type info arguments, cleanup arguments
/// are supported. Filters are not supported.
-/// See Variable Length Data in:
+/// See Variable Length Data in:
/// @link http://dwarfstd.org/Dwarf3.pdf @unlink
-/// Also see @link http://refspecs.freestandards.org/abi-eh-1.21.html @unlink
+/// Also see @link http://mentorembedded.github.com/cxx-abi/abi-eh.html @unlink
/// @param resultAction reference variable which will be set with result
/// @param classInfo our array of type info pointers (to globals)
-/// @param actionEntry index into above type info array or 0 (clean up).
+/// @param actionEntry index into above type info array or 0 (clean up).
/// We do not support filters.
/// @param exceptionClass exception class (_Unwind_Exception::exception_class)
/// of thrown exception.
/// @returns whether or not a type info was found. False is returned if only
/// a cleanup was found
static bool handleActionValue(int64_t *resultAction,
- struct OurExceptionType_t **classInfo,
- uintptr_t actionEntry,
- uint64_t exceptionClass,
+ uint8_t TTypeEncoding,
+ const uint8_t *ClassInfo,
+ uintptr_t actionEntry,
+ uint64_t exceptionClass,
struct _Unwind_Exception *exceptionObject) {
bool ret = false;
-
- if (!resultAction ||
- !exceptionObject ||
+
+ if (!resultAction ||
+ !exceptionObject ||
(exceptionClass != ourBaseExceptionClass))
return(ret);
-
+
struct OurBaseException_t *excp = (struct OurBaseException_t*)
(((char*) exceptionObject) + ourBaseFromUnwindOffset);
struct OurExceptionType_t *excpType = &(excp->type);
int type = excpType->type;
-
+
#ifdef DEBUG
fprintf(stderr,
"handleActionValue(...): exceptionObject = <%p>, "
exceptionObject,
excp);
#endif
-
+
const uint8_t *actionPos = (uint8_t*) actionEntry,
*tempActionPos;
int64_t typeOffset = 0,
actionOffset;
-
+
for (int i = 0; true; ++i) {
// Each emitted dwarf action corresponds to a 2 tuple of
// type info address offset, and action offset to the next
typeOffset = readSLEB128(&actionPos);
tempActionPos = actionPos;
actionOffset = readSLEB128(&tempActionPos);
-
+
#ifdef DEBUG
fprintf(stderr,
"handleActionValue(...):typeOffset: <%lld>, "
typeOffset,
actionOffset);
#endif
- assert((typeOffset >= 0) &&
+ assert((typeOffset >= 0) &&
"handleActionValue(...):filters are not supported.");
-
+
// Note: A typeOffset == 0 implies that a cleanup llvm.eh.selector
// argument has been matched.
- if ((typeOffset > 0) &&
- (type == (classInfo[-typeOffset])->type)) {
+ if (typeOffset > 0) {
#ifdef DEBUG
fprintf(stderr,
"handleActionValue(...):actionValue <%d> found.\n",
i);
#endif
- *resultAction = i + 1;
- ret = true;
- break;
+ unsigned EncSize = getEncodingSize(TTypeEncoding);
+ const uint8_t *EntryP = ClassInfo - typeOffset * EncSize;
+ uintptr_t P = readEncodedPointer(&EntryP, TTypeEncoding);
+ struct OurExceptionType_t *ThisClassInfo =
+ reinterpret_cast<struct OurExceptionType_t *>(P);
+ if (ThisClassInfo->type == type) {
+ *resultAction = i + 1;
+ ret = true;
+ break;
+ }
}
-
+
#ifdef DEBUG
fprintf(stderr,
"handleActionValue(...):actionValue not found.\n");
#endif
if (!actionOffset)
break;
-
+
actionPos += actionOffset;
}
-
+
return(ret);
}
/// Deals with the Language specific data portion of the emitted dwarf code.
-/// See @link http://refspecs.freestandards.org/abi-eh-1.21.html @unlink
+/// See @link http://mentorembedded.github.com/cxx-abi/abi-eh.html @unlink
/// @param version unsupported (ignored), unwind version
/// @param lsda language specific data area
-/// @param _Unwind_Action actions minimally supported unwind stage
+/// @param _Unwind_Action actions minimally supported unwind stage
/// (forced specifically not supported)
/// @param exceptionClass exception class (_Unwind_Exception::exception_class)
/// of thrown exception.
/// @param exceptionObject thrown _Unwind_Exception instance.
/// @param context unwind system context
-/// @returns minimally supported unwinding control indicator
-static _Unwind_Reason_Code handleLsda(int version,
+/// @returns minimally supported unwinding control indicator
+static _Unwind_Reason_Code handleLsda(int version,
const uint8_t *lsda,
_Unwind_Action actions,
- uint64_t exceptionClass,
+ uint64_t exceptionClass,
struct _Unwind_Exception *exceptionObject,
_Unwind_Context_t context) {
_Unwind_Reason_Code ret = _URC_CONTINUE_UNWIND;
-
+
if (!lsda)
return(ret);
-
+
#ifdef DEBUG
- fprintf(stderr,
+ fprintf(stderr,
"handleLsda(...):lsda is non-zero.\n");
#endif
-
+
// Get the current instruction pointer and offset it before next
// instruction in the current frame which threw the exception.
uintptr_t pc = _Unwind_GetIP(context)-1;
-
- // Get beginning current frame's code (as defined by the
+
+ // Get beginning current frame's code (as defined by the
// emitted dwarf code)
uintptr_t funcStart = _Unwind_GetRegionStart(context);
uintptr_t pcOffset = pc - funcStart;
- struct OurExceptionType_t **classInfo = NULL;
-
+ const uint8_t *ClassInfo = NULL;
+
// Note: See JITDwarfEmitter::EmitExceptionTable(...) for corresponding
// dwarf emission
-
+
// Parse LSDA header.
uint8_t lpStartEncoding = *lsda++;
-
+
if (lpStartEncoding != llvm::dwarf::DW_EH_PE_omit) {
- readEncodedPointer(&lsda, lpStartEncoding);
+ readEncodedPointer(&lsda, lpStartEncoding);
}
-
+
uint8_t ttypeEncoding = *lsda++;
uintptr_t classInfoOffset;
-
+
if (ttypeEncoding != llvm::dwarf::DW_EH_PE_omit) {
// Calculate type info locations in emitted dwarf code which
// were flagged by type info arguments to llvm.eh.selector
// intrinsic
classInfoOffset = readULEB128(&lsda);
- classInfo = (struct OurExceptionType_t**) (lsda + classInfoOffset);
+ ClassInfo = lsda + classInfoOffset;
}
-
- // Walk call-site table looking for range that
- // includes current PC.
-
+
+ // Walk call-site table looking for range that
+ // includes current PC.
+
uint8_t callSiteEncoding = *lsda++;
uint32_t callSiteTableLength = readULEB128(&lsda);
const uint8_t *callSiteTableStart = lsda;
- const uint8_t *callSiteTableEnd = callSiteTableStart +
+ const uint8_t *callSiteTableEnd = callSiteTableStart +
callSiteTableLength;
const uint8_t *actionTableStart = callSiteTableEnd;
const uint8_t *callSitePtr = callSiteTableStart;
-
- bool foreignException = false;
-
+
while (callSitePtr < callSiteTableEnd) {
- uintptr_t start = readEncodedPointer(&callSitePtr,
+ uintptr_t start = readEncodedPointer(&callSitePtr,
callSiteEncoding);
- uintptr_t length = readEncodedPointer(&callSitePtr,
+ uintptr_t length = readEncodedPointer(&callSitePtr,
callSiteEncoding);
- uintptr_t landingPad = readEncodedPointer(&callSitePtr,
+ uintptr_t landingPad = readEncodedPointer(&callSitePtr,
callSiteEncoding);
-
+
// Note: Action value
uintptr_t actionEntry = readULEB128(&callSitePtr);
-
+
if (exceptionClass != ourBaseExceptionClass) {
// We have been notified of a foreign exception being thrown,
// and we therefore need to execute cleanup landing pads
actionEntry = 0;
- foreignException = true;
}
-
+
if (landingPad == 0) {
#ifdef DEBUG
fprintf(stderr,
"handleLsda(...): No landing pad found.\n");
#endif
-
+
continue; // no landing pad for this entry
}
-
+
if (actionEntry) {
actionEntry += ((uintptr_t) actionTableStart) - 1;
}
"handleLsda(...):No action table found.\n");
#endif
}
-
+
bool exceptionMatched = false;
-
+
if ((start <= pcOffset) && (pcOffset < (start + length))) {
#ifdef DEBUG
fprintf(stderr,
"handleLsda(...): Landing pad found.\n");
#endif
int64_t actionValue = 0;
-
+
if (actionEntry) {
exceptionMatched = handleActionValue(&actionValue,
- classInfo,
- actionEntry,
- exceptionClass,
+ ttypeEncoding,
+ ClassInfo,
+ actionEntry,
+ exceptionClass,
exceptionObject);
}
-
+
if (!(actions & _UA_SEARCH_PHASE)) {
#ifdef DEBUG
fprintf(stderr,
"handleLsda(...): installed landing pad "
"context.\n");
#endif
-
+
// Found landing pad for the PC.
- // Set Instruction Pointer to so we re-enter function
- // at landing pad. The landing pad is created by the
+ // Set Instruction Pointer to so we re-enter function
+ // at landing pad. The landing pad is created by the
// compiler to take two parameters in registers.
- _Unwind_SetGR(context,
- __builtin_eh_return_data_regno(0),
+ _Unwind_SetGR(context,
+ __builtin_eh_return_data_regno(0),
(uintptr_t)exceptionObject);
-
+
// Note: this virtual register directly corresponds
// to the return of the llvm.eh.selector intrinsic
if (!actionEntry || !exceptionMatched) {
// We indicate cleanup only
- _Unwind_SetGR(context,
- __builtin_eh_return_data_regno(1),
+ _Unwind_SetGR(context,
+ __builtin_eh_return_data_regno(1),
0);
}
else {
// Matched type info index of llvm.eh.selector intrinsic
// passed here.
- _Unwind_SetGR(context,
- __builtin_eh_return_data_regno(1),
+ _Unwind_SetGR(context,
+ __builtin_eh_return_data_regno(1),
actionValue);
}
-
+
// To execute landing pad set here
_Unwind_SetIP(context, funcStart + landingPad);
ret = _URC_INSTALL_CONTEXT;
}
else {
// Note: Only non-clean up handlers are marked as
- // found. Otherwise the clean up handlers will be
- // re-found and executed during the clean up
+ // found. Otherwise the clean up handlers will be
+ // re-found and executed during the clean up
// phase.
#ifdef DEBUG
fprintf(stderr,
"handleLsda(...): cleanup handler found.\n");
#endif
}
-
+
break;
}
}
-
+
return(ret);
}
/// This is the personality function which is embedded (dwarf emitted), in the
/// dwarf unwind info block. Again see: JITDwarfEmitter.cpp.
-/// See @link http://refspecs.freestandards.org/abi-eh-1.21.html @unlink
+/// See @link http://mentorembedded.github.com/cxx-abi/abi-eh.html @unlink
/// @param version unsupported (ignored), unwind version
-/// @param _Unwind_Action actions minimally supported unwind stage
+/// @param _Unwind_Action actions minimally supported unwind stage
/// (forced specifically not supported)
/// @param exceptionClass exception class (_Unwind_Exception::exception_class)
/// of thrown exception.
/// @param exceptionObject thrown _Unwind_Exception instance.
/// @param context unwind system context
-/// @returns minimally supported unwinding control indicator
-_Unwind_Reason_Code ourPersonality(int version,
+/// @returns minimally supported unwinding control indicator
+_Unwind_Reason_Code ourPersonality(int version,
_Unwind_Action actions,
- uint64_t exceptionClass,
+ uint64_t exceptionClass,
struct _Unwind_Exception *exceptionObject,
_Unwind_Context_t context) {
#ifdef DEBUG
- fprintf(stderr,
+ fprintf(stderr,
"We are in ourPersonality(...):actions is <%d>.\n",
actions);
-
+
if (actions & _UA_SEARCH_PHASE) {
fprintf(stderr, "ourPersonality(...):In search phase.\n");
}
fprintf(stderr, "ourPersonality(...):In non-search phase.\n");
}
#endif
-
+
const uint8_t *lsda = _Unwind_GetLanguageSpecificData(context);
-
+
#ifdef DEBUG
- fprintf(stderr,
+ fprintf(stderr,
"ourPersonality(...):lsda = <%p>.\n",
lsda);
#endif
-
+
// The real work of the personality function is captured here
return(handleLsda(version,
lsda,
/// Generates our _Unwind_Exception class from a given character array.
/// thereby handling arbitrary lengths (not in standard), and handling
/// embedded \0s.
-/// See @link http://refspecs.freestandards.org/abi-eh-1.21.html @unlink
+/// See @link http://mentorembedded.github.com/cxx-abi/abi-eh.html @unlink
/// @param classChars char array to encode. NULL values not checkedf
/// @param classCharsSize number of chars in classChars. Value is not checked.
/// @returns class value
uint64_t genClass(const unsigned char classChars[], size_t classCharsSize)
{
uint64_t ret = classChars[0];
-
+
for (unsigned i = 1; i < classCharsSize; ++i) {
ret <<= 8;
ret += classChars[i];
}
-
+
return(ret);
}
/// @param module code for module instance
/// @param builder builder instance
/// @param toPrint string to print
-/// @param useGlobal A value of true (default) indicates a GlobalValue is
-/// generated, and is used to hold the constant string. A value of
-/// false indicates that the constant string will be stored on the
+/// @param useGlobal A value of true (default) indicates a GlobalValue is
+/// generated, and is used to hold the constant string. A value of
+/// false indicates that the constant string will be stored on the
/// stack.
-void generateStringPrint(llvm::LLVMContext &context,
+void generateStringPrint(llvm::LLVMContext &context,
llvm::Module &module,
- llvm::IRBuilder<> &builder,
+ llvm::IRBuilder<> &builder,
std::string toPrint,
bool useGlobal = true) {
llvm::Function *printFunct = module.getFunction("printStr");
-
+
llvm::Value *stringVar;
- llvm::Constant *stringConstant =
- llvm::ConstantArray::get(context, toPrint);
-
+ llvm::Constant *stringConstant =
+ llvm::ConstantDataArray::getString(context, toPrint);
+
if (useGlobal) {
// Note: Does not work without allocation
- stringVar =
- new llvm::GlobalVariable(module,
+ stringVar =
+ new llvm::GlobalVariable(module,
stringConstant->getType(),
- true,
- llvm::GlobalValue::LinkerPrivateLinkage,
- stringConstant,
+ true,
+ llvm::GlobalValue::PrivateLinkage,
+ stringConstant,
"");
}
else {
stringVar = builder.CreateAlloca(stringConstant->getType());
builder.CreateStore(stringConstant, stringVar);
}
-
- llvm::Value *cast =
- builder.CreatePointerCast(stringVar,
- builder.getInt8Ty()->getPointerTo());
+
+ llvm::Value *cast = builder.CreatePointerCast(stringVar,
+ builder.getInt8PtrTy());
builder.CreateCall(printFunct, cast);
}
/// @param printFunct function used to "print" integer
/// @param toPrint string to print
/// @param format printf like formating string for print
-/// @param useGlobal A value of true (default) indicates a GlobalValue is
-/// generated, and is used to hold the constant string. A value of
-/// false indicates that the constant string will be stored on the
+/// @param useGlobal A value of true (default) indicates a GlobalValue is
+/// generated, and is used to hold the constant string. A value of
+/// false indicates that the constant string will be stored on the
/// stack.
-void generateIntegerPrint(llvm::LLVMContext &context,
+void generateIntegerPrint(llvm::LLVMContext &context,
llvm::Module &module,
- llvm::IRBuilder<> &builder,
+ llvm::IRBuilder<> &builder,
llvm::Function &printFunct,
llvm::Value &toPrint,
- std::string format,
+ std::string format,
bool useGlobal = true) {
- llvm::Constant *stringConstant = llvm::ConstantArray::get(context, format);
+ llvm::Constant *stringConstant =
+ llvm::ConstantDataArray::getString(context, format);
llvm::Value *stringVar;
-
+
if (useGlobal) {
// Note: Does not seem to work without allocation
- stringVar =
- new llvm::GlobalVariable(module,
+ stringVar =
+ new llvm::GlobalVariable(module,
stringConstant->getType(),
- true,
- llvm::GlobalValue::LinkerPrivateLinkage,
- stringConstant,
+ true,
+ llvm::GlobalValue::PrivateLinkage,
+ stringConstant,
"");
}
else {
stringVar = builder.CreateAlloca(stringConstant->getType());
builder.CreateStore(stringConstant, stringVar);
}
-
- llvm::Value *cast =
- builder.CreateBitCast(stringVar,
- builder.getInt8Ty()->getPointerTo());
+
+ llvm::Value *cast = builder.CreateBitCast(stringVar,
+ builder.getInt8PtrTy());
builder.CreateCall2(&printFunct, &toPrint, cast);
}
-/// Generates code to handle finally block type semantics: always runs
-/// regardless of whether a thrown exception is passing through or the
-/// parent function is simply exiting. In addition to printing some state
-/// to stderr, this code will resume the exception handling--runs the
-/// unwind resume block, if the exception has not been previously caught
-/// by a catch clause, and will otherwise execute the end block (terminator
-/// block). In addition this function creates the corresponding function's
+/// Generates code to handle finally block type semantics: always runs
+/// regardless of whether a thrown exception is passing through or the
+/// parent function is simply exiting. In addition to printing some state
+/// to stderr, this code will resume the exception handling--runs the
+/// unwind resume block, if the exception has not been previously caught
+/// by a catch clause, and will otherwise execute the end block (terminator
+/// block). In addition this function creates the corresponding function's
/// stack storage for the exception pointer and catch flag status.
/// @param context llvm context
/// @param module code for module instance
/// @param unwindResumeBlock unwind resume block
/// @param exceptionCaughtFlag reference exception caught/thrown status storage
/// @param exceptionStorage reference to exception pointer storage
+/// @param caughtResultStorage reference to landingpad result storage
/// @returns newly created block
-static llvm::BasicBlock *createFinallyBlock(llvm::LLVMContext &context,
- llvm::Module &module,
- llvm::IRBuilder<> &builder,
+static llvm::BasicBlock *createFinallyBlock(llvm::LLVMContext &context,
+ llvm::Module &module,
+ llvm::IRBuilder<> &builder,
llvm::Function &toAddTo,
std::string &blockName,
std::string &functionId,
llvm::BasicBlock &terminatorBlock,
llvm::BasicBlock &unwindResumeBlock,
llvm::Value **exceptionCaughtFlag,
- llvm::Value **exceptionStorage) {
- assert(exceptionCaughtFlag &&
+ llvm::Value **exceptionStorage,
+ llvm::Value **caughtResultStorage) {
+ assert(exceptionCaughtFlag &&
"ExceptionDemo::createFinallyBlock(...):exceptionCaughtFlag "
"is NULL");
- assert(exceptionStorage &&
+ assert(exceptionStorage &&
"ExceptionDemo::createFinallyBlock(...):exceptionStorage "
"is NULL");
-
- *exceptionCaughtFlag =
- createEntryBlockAlloca(toAddTo,
- "exceptionCaught",
- ourExceptionNotThrownState->getType(),
- ourExceptionNotThrownState);
-
- const llvm::PointerType *exceptionStorageType =
- builder.getInt8Ty()->getPointerTo();
- *exceptionStorage =
- createEntryBlockAlloca(toAddTo,
- "exceptionStorage",
- exceptionStorageType,
- llvm::ConstantPointerNull::get(
- exceptionStorageType));
-
+ assert(caughtResultStorage &&
+ "ExceptionDemo::createFinallyBlock(...):caughtResultStorage "
+ "is NULL");
+
+ *exceptionCaughtFlag = createEntryBlockAlloca(toAddTo,
+ "exceptionCaught",
+ ourExceptionNotThrownState->getType(),
+ ourExceptionNotThrownState);
+
+ llvm::PointerType *exceptionStorageType = builder.getInt8PtrTy();
+ *exceptionStorage = createEntryBlockAlloca(toAddTo,
+ "exceptionStorage",
+ exceptionStorageType,
+ llvm::ConstantPointerNull::get(
+ exceptionStorageType));
+ *caughtResultStorage = createEntryBlockAlloca(toAddTo,
+ "caughtResultStorage",
+ ourCaughtResultType,
+ llvm::ConstantAggregateZero::get(
+ ourCaughtResultType));
+
llvm::BasicBlock *ret = llvm::BasicBlock::Create(context,
blockName,
&toAddTo);
-
+
builder.SetInsertPoint(ret);
-
+
std::ostringstream bufferToPrint;
bufferToPrint << "Gen: Executing finally block "
<< blockName << " in " << functionId << "\n";
- generateStringPrint(context,
- module,
- builder,
+ generateStringPrint(context,
+ module,
+ builder,
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);
-
+
return(ret);
}
/// Generates catch block semantics which print a string to indicate type of
-/// catch executed, sets an exception caught flag, and executes passed in
+/// catch executed, sets an exception caught flag, and executes passed in
/// end block (terminator block).
/// @param context llvm context
/// @param module code for module instance
/// @param terminatorBlock terminator "end" block
/// @param exceptionCaughtFlag exception caught/thrown status
/// @returns newly created block
-static llvm::BasicBlock *createCatchBlock(llvm::LLVMContext &context,
- llvm::Module &module,
- llvm::IRBuilder<> &builder,
+static llvm::BasicBlock *createCatchBlock(llvm::LLVMContext &context,
+ llvm::Module &module,
+ llvm::IRBuilder<> &builder,
llvm::Function &toAddTo,
std::string &blockName,
std::string &functionId,
llvm::BasicBlock &terminatorBlock,
llvm::Value &exceptionCaughtFlag) {
-
+
llvm::BasicBlock *ret = llvm::BasicBlock::Create(context,
blockName,
&toAddTo);
-
+
builder.SetInsertPoint(ret);
-
+
std::ostringstream bufferToPrint;
bufferToPrint << "Gen: Executing catch block "
<< blockName
<< " in "
<< functionId
<< std::endl;
- generateStringPrint(context,
- module,
- builder,
+ generateStringPrint(context,
+ module,
+ builder,
bufferToPrint.str(),
USE_GLOBAL_STR_CONSTS);
builder.CreateStore(ourExceptionCaughtState, &exceptionCaughtFlag);
builder.CreateBr(&terminatorBlock);
-
+
return(ret);
}
-/// Generates a function which invokes a function (toInvoke) and, whose
-/// unwind block will "catch" the type info types correspondingly held in the
-/// exceptionTypesToCatch argument. If the toInvoke function throws an
-/// exception which does not match any type info types contained in
-/// exceptionTypesToCatch, the generated code will call _Unwind_Resume
-/// with the raised exception. On the other hand the generated code will
+/// Generates a function which invokes a function (toInvoke) and, whose
+/// unwind block will "catch" the type info types correspondingly held in the
+/// exceptionTypesToCatch argument. If the toInvoke function throws an
+/// exception which does not match any type info types contained in
+/// exceptionTypesToCatch, the generated code will call _Unwind_Resume
+/// with the raised exception. On the other hand the generated code will
/// normally exit if the toInvoke function does not throw an exception.
-/// The generated "finally" block is always run regardless of the cause of
+/// The generated "finally" block is always run regardless of the cause of
/// the generated function exit.
/// The generated function is returned after being verified.
/// @param module code for module instance
/// @param builder builder instance
-/// @param fpm a function pass manager holding optional IR to IR
+/// @param fpm a function pass manager holding optional IR to IR
/// transformations
/// @param toInvoke inner function to invoke
/// @param ourId id used to printing purposes
/// @param numExceptionsToCatch length of exceptionTypesToCatch array
/// @param exceptionTypesToCatch array of type info types to "catch"
/// @returns generated function
-static
-llvm::Function *createCatchWrappedInvokeFunction(llvm::Module &module,
- llvm::IRBuilder<> &builder,
- llvm::FunctionPassManager &fpm,
- llvm::Function &toInvoke,
- std::string ourId,
- unsigned numExceptionsToCatch,
- unsigned exceptionTypesToCatch[]) {
-
+static llvm::Function *createCatchWrappedInvokeFunction(
+ llvm::Module &module, llvm::IRBuilder<> &builder,
+ llvm::legacy::FunctionPassManager &fpm, llvm::Function &toInvoke,
+ std::string ourId, unsigned numExceptionsToCatch,
+ unsigned exceptionTypesToCatch[]) {
+
llvm::LLVMContext &context = module.getContext();
llvm::Function *toPrint32Int = module.getFunction("print32Int");
-
+
ArgTypes argTypes;
argTypes.push_back(builder.getInt32Ty());
-
+
ArgNames argNames;
argNames.push_back("exceptTypeToThrow");
-
- llvm::Function *ret = createFunction(module,
+
+ llvm::Function *ret = createFunction(module,
builder.getVoidTy(),
- argTypes,
- argNames,
+ argTypes,
+ argNames,
ourId,
- llvm::Function::ExternalLinkage,
- false,
+ llvm::Function::ExternalLinkage,
+ false,
false);
-
+
// Block which calls invoke
llvm::BasicBlock *entryBlock = llvm::BasicBlock::Create(context,
- "entry",
+ "entry",
ret);
// Normal block for invoke
- llvm::BasicBlock *normalBlock = llvm::BasicBlock::Create(context,
- "normal",
+ llvm::BasicBlock *normalBlock = llvm::BasicBlock::Create(context,
+ "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;
-
- // Finally block which will branch to unwindResumeBlock if
+ llvm::Value *caughtResultStorage = NULL;
+
+ // Finally block which will branch to unwindResumeBlock if
// exception is not caught. Initializes/allocates stack locations.
- llvm::BasicBlock *finallyBlock = createFinallyBlock(context,
- module,
- builder,
- *ret,
- nextName = "finally",
+ llvm::BasicBlock *finallyBlock = createFinallyBlock(context,
+ module,
+ builder,
+ *ret,
+ nextName = "finally",
ourId,
*endBlock,
*unwindResumeBlock,
&exceptionCaughtFlag,
- &exceptionStorage);
-
+ &exceptionStorage,
+ &caughtResultStorage
+ );
+
for (unsigned i = 0; i < numExceptionsToCatch; ++i) {
nextName = ourTypeInfoNames[exceptionTypesToCatch[i]];
-
+
// One catch block per type info to be caught
- catchBlocks[i] = createCatchBlock(context,
- module,
- builder,
+ catchBlocks[i] = createCatchBlock(context,
+ module,
+ builder,
*ret,
- nextName,
+ nextName,
ourId,
*finallyBlock,
*exceptionCaughtFlag);
}
-
+
// Entry Block
-
+
builder.SetInsertPoint(entryBlock);
-
+
std::vector<llvm::Value*> args;
args.push_back(namedValues["exceptTypeToThrow"]);
- builder.CreateInvoke(&toInvoke,
- normalBlock,
- exceptionBlock,
- args.begin(),
- args.end());
-
+ builder.CreateInvoke(&toInvoke,
+ normalBlock,
+ exceptionBlock,
+ args);
+
// End Block
-
+
builder.SetInsertPoint(endBlock);
-
- generateStringPrint(context,
+
+ generateStringPrint(context,
module,
- builder,
+ 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,
+ builder.CreateCall(deleteOurException,
builder.CreateLoad(exceptionStorage));
builder.CreateRetVoid();
-
+
// Normal Block
-
+
builder.SetInsertPoint(normalBlock);
-
- generateStringPrint(context,
+
+ generateStringPrint(context,
module,
- builder,
+ builder,
"Gen: No exception in " + ourId + "!\n",
USE_GLOBAL_STR_CONSTS);
-
+
// Finally block is always called
builder.CreateBr(finallyBlock);
-
+
// Unwind Resume Block
-
+
builder.SetInsertPoint(unwindResumeBlock);
-
- llvm::Function *resumeOurException =
- module.getFunction("_Unwind_Resume");
- builder.CreateCall(resumeOurException,
- builder.CreateLoad(exceptionStorage));
- builder.CreateUnreachable();
-
+
+ builder.CreateResume(builder.CreateLoad(caughtResultStorage));
+
// Exception Block
-
+
builder.SetInsertPoint(exceptionBlock);
-
- 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.getInt8Ty()->getPointerTo());
-
- args.clear();
- args.push_back(unwindException);
- args.push_back(functPtr);
-
- // Note: Skipping index 0
+
+ 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
- args.push_back(module.getGlobalVariable(
- ourTypeInfoNames[exceptionTypesToCatch[i]]));
+ caughtResult->addClause(module.getGlobalVariable(
+ ourTypeInfoNames[exceptionTypesToCatch[i]]));
}
-
- args.push_back(llvm::ConstantInt::get(builder.getInt32Ty(), 0));
-
- llvm::Function *ehSelector = module.getFunction("llvm.eh.selector");
-
- // Set up this exeption block as the landing pad which will handle
- // given type infos. See case Intrinsic::eh_selector in
- // SelectionDAGBuilder::visitIntrinsicCall(...) and AddCatchInfo(...)
- // implemented in FunctionLoweringInfo.cpp to see how the implementation
- // handles this call. This landing pad (this exception block), will be
- // 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.begin(),
- args.end());
-
- // Retrieve exception_class member from thrown exception
+
+ llvm::Value *unwindException = builder.CreateExtractValue(caughtResult, 0);
+ llvm::Value *retTypeInfoIndex = builder.CreateExtractValue(caughtResult, 1);
+
+ // FIXME: Redundant storage which, beyond utilizing value of
+ // caughtResultStore for unwindException storage, may be alleviated
+ // altogether with a block rearrangement
+ builder.CreateStore(caughtResult, caughtResultStorage);
+ builder.CreateStore(unwindException, exceptionStorage);
+ builder.CreateStore(ourExceptionThrownState, exceptionCaughtFlag);
+
+ // Retrieve exception_class member from thrown exception
// (_Unwind_Exception instance). This member tells us whether or not
// the exception is foreign.
- llvm::Value *unwindExceptionClass =
+ llvm::Value *unwindExceptionClass =
builder.CreateLoad(builder.CreateStructGEP(
- builder.CreatePointerCast(unwindException,
- ourUnwindExceptionType->getPointerTo()),
+ builder.CreatePointerCast(unwindException,
+ ourUnwindExceptionType->getPointerTo()),
0));
-
+
// Branch to the externalExceptionBlock if the exception is foreign or
// to a catch router if not. Either way the finally block will be run.
builder.CreateCondBr(builder.CreateICmpEQ(unwindExceptionClass,
- llvm::ConstantInt::get(builder.getInt64Ty(),
+ llvm::ConstantInt::get(builder.getInt64Ty(),
ourBaseExceptionClass)),
exceptionRouteBlock,
externalExceptionBlock);
-
+
// External Exception Block
-
+
builder.SetInsertPoint(externalExceptionBlock);
-
- generateStringPrint(context,
+
+ generateStringPrint(context,
module,
- builder,
+ builder,
"Gen: Foreign exception received.\n",
USE_GLOBAL_STR_CONSTS);
-
+
// Branch to the finally block
builder.CreateBr(finallyBlock);
-
+
// Exception Route Block
-
+
builder.SetInsertPoint(exceptionRouteBlock);
-
- // Casts exception pointer (_Unwind_Exception instance) to parent
+
+ // Casts exception pointer (_Unwind_Exception instance) to parent
// (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
//
// Note: Index is not relative to pointer but instead to structure
// unlike a true getelementptr (GEP) instruction
typeInfoThrown = builder.CreateStructGEP(typeInfoThrown, 0);
-
- llvm::Value *typeInfoThrownType =
+
+ llvm::Value *typeInfoThrownType =
builder.CreateStructGEP(typeInfoThrown, 0);
-
- generateIntegerPrint(context,
+
+ generateIntegerPrint(context,
module,
- builder,
- *toPrint32Int,
+ builder,
+ *toPrint32Int,
*(builder.CreateLoad(typeInfoThrownType)),
- "Gen: Exception type <%d> received (stack unwound) "
- " in " +
- ourId +
+ "Gen: Exception type <%d> received (stack unwound) "
+ " in " +
+ ourId +
".\n",
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;
-
+
for (unsigned i = 1; i <= numExceptionsToCatch; ++i) {
nextTypeToCatch = i - 1;
switchToCatchBlock->addCase(llvm::ConstantInt::get(
llvm::Type::getInt32Ty(context), i),
catchBlocks[nextTypeToCatch]);
}
-
+
llvm::verifyFunction(*ret);
fpm.run(*ret);
-
+
return(ret);
}
/// Generates function which throws either an exception matched to a runtime
-/// determined type info type (argument to generated function), or if this
-/// runtime value matches nativeThrowType, throws a foreign exception by
+/// determined type info type (argument to generated function), or if this
+/// runtime value matches nativeThrowType, throws a foreign exception by
/// calling nativeThrowFunct.
/// @param module code for module instance
/// @param builder builder instance
-/// @param fpm a function pass manager holding optional IR to IR
+/// @param fpm a function pass manager holding optional IR to IR
/// transformations
/// @param ourId id used to printing purposes
/// @param nativeThrowType a runtime argument of this value results in
/// @param nativeThrowFunct function which will throw a foreign exception
/// if the above nativeThrowType matches generated function's arg.
/// @returns generated function
-static
-llvm::Function *createThrowExceptionFunction(llvm::Module &module,
- llvm::IRBuilder<> &builder,
- llvm::FunctionPassManager &fpm,
- std::string ourId,
- int32_t nativeThrowType,
- llvm::Function &nativeThrowFunct) {
+static llvm::Function *
+createThrowExceptionFunction(llvm::Module &module, llvm::IRBuilder<> &builder,
+ llvm::legacy::FunctionPassManager &fpm,
+ std::string ourId, int32_t nativeThrowType,
+ llvm::Function &nativeThrowFunct) {
llvm::LLVMContext &context = module.getContext();
namedValues.clear();
ArgTypes unwindArgTypes;
unwindArgTypes.push_back(builder.getInt32Ty());
ArgNames unwindArgNames;
unwindArgNames.push_back("exceptTypeToThrow");
-
+
llvm::Function *ret = createFunction(module,
builder.getVoidTy(),
unwindArgTypes,
llvm::Function::ExternalLinkage,
false,
false);
-
+
// Throws either one of our exception or a native C++ exception depending
// on a runtime argument value containing a type info type.
llvm::BasicBlock *entryBlock = llvm::BasicBlock::Create(context,
- "entry",
+ "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"];
-
+
// nativeThrowBlock block
-
+
builder.SetInsertPoint(nativeThrowBlock);
-
+
// Throws foreign exception
builder.CreateCall(&nativeThrowFunct, exceptionType);
builder.CreateUnreachable();
-
+
// entry block
-
+
builder.SetInsertPoint(entryBlock);
-
+
llvm::Function *toPrint32Int = module.getFunction("print32Int");
- generateIntegerPrint(context,
+ generateIntegerPrint(context,
module,
- builder,
- *toPrint32Int,
- *exceptionType,
- "\nGen: About to throw exception type <%d> in " +
- ourId +
+ builder,
+ *toPrint32Int,
+ *exceptionType,
+ "\nGen: About to throw exception type <%d> in " +
+ ourId +
".\n",
USE_GLOBAL_STR_CONSTS);
-
+
// Switches on runtime type info type value to determine whether or not
- // a foreign exception is thrown. Defaults to throwing one of our
+ // a foreign exception is thrown. Defaults to throwing one of our
// generated exceptions.
llvm::SwitchInst *theSwitch = builder.CreateSwitch(exceptionType,
generatedThrowBlock,
1);
-
- theSwitch->addCase(llvm::ConstantInt::get(llvm::Type::getInt32Ty(context),
+
+ theSwitch->addCase(llvm::ConstantInt::get(llvm::Type::getInt32Ty(context),
nativeThrowType),
nativeThrowBlock);
-
+
// generatedThrow block
-
+
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);
builder.CreateUnreachable();
-
+
llvm::verifyFunction(*ret);
fpm.run(*ret);
-
+
return(ret);
}
static void createStandardUtilityFunctions(unsigned numTypeInfos,
- llvm::Module &module,
+ llvm::Module &module,
llvm::IRBuilder<> &builder);
-/// Creates test code by generating and organizing these functions into the
+/// Creates test code by generating and organizing these functions into the
/// test case. The test case consists of an outer function setup to invoke
-/// an inner function within an environment having multiple catch and single
+/// an inner function within an environment having multiple catch and single
/// finally blocks. This inner function is also setup to invoke a throw
-/// function within an evironment similar in nature to the outer function's
+/// function within an evironment similar in nature to the outer function's
/// catch and finally blocks. Each of these two functions catch mutually
/// exclusive subsets (even or odd) of the type info types configured
/// for this this. All generated functions have a runtime argument which
/// a supplied a function which in turn will throw a foreign exception.
/// @param module code for module instance
/// @param builder builder instance
-/// @param fpm a function pass manager holding optional IR to IR
+/// @param fpm a function pass manager holding optional IR to IR
/// transformations
/// @param nativeThrowFunctName name of external function which will throw
/// a foreign exception
/// @returns outermost generated test function.
-llvm::Function *createUnwindExceptionTest(llvm::Module &module,
- llvm::IRBuilder<> &builder,
- llvm::FunctionPassManager &fpm,
- std::string nativeThrowFunctName) {
+llvm::Function *
+createUnwindExceptionTest(llvm::Module &module, llvm::IRBuilder<> &builder,
+ llvm::legacy::FunctionPassManager &fpm,
+ std::string nativeThrowFunctName) {
// Number of type infos to generate
unsigned numTypeInfos = 6;
-
+
// Initialze intrisics and external functions to use along with exception
// and type info globals.
createStandardUtilityFunctions(numTypeInfos,
module,
builder);
- llvm::Function *nativeThrowFunct =
- module.getFunction(nativeThrowFunctName);
-
- // Create exception throw function using the value ~0 to cause
+ 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);
-
+ size_t numExceptionTypesToCatch = sizeof(innerExceptionTypesToCatch) /
+ 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};
- numExceptionTypesToCatch = sizeof(outerExceptionTypesToCatch) /
+ numExceptionTypesToCatch = sizeof(outerExceptionTypesToCatch) /
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);
}
-
+namespace {
/// Represents our foreign exceptions
class OurCppRunException : public std::runtime_error {
public:
OurCppRunException(const std::string reason) :
std::runtime_error(reason) {}
-
+
OurCppRunException (const OurCppRunException &toCopy) :
std::runtime_error(toCopy) {}
-
+
OurCppRunException &operator = (const OurCppRunException &toCopy) {
return(reinterpret_cast<OurCppRunException&>(
std::runtime_error::operator=(toCopy)));
}
-
- ~OurCppRunException (void) throw () {}
-};
+ ~OurCppRunException(void) throw() override {}
+};
+} // end anonymous namespace
/// Throws foreign C++ exception.
/// @param ignoreIt unused parameter that allows function to match implied
typedef void (*OurExceptionThrowFunctType) (int32_t typeToThrow);
-/// This is a test harness which runs test by executing generated
-/// function with a type info type to throw. Harness wraps the excecution
+/// This is a test harness which runs test by executing generated
+/// function with a type info type to throw. Harness wraps the execution
/// of generated function in a C++ try catch clause.
/// @param engine execution engine to use for executing generated function.
/// This demo program expects this to be a JIT instance for demo
/// @param typeToThrow type info type of generated exception to throw, or
/// indicator to cause foreign exception to be thrown.
static
-void runExceptionThrow(llvm::ExecutionEngine *engine,
- llvm::Function *function,
+void runExceptionThrow(llvm::ExecutionEngine *engine,
+ llvm::Function *function,
int32_t typeToThrow) {
-
+
// Find test's function pointer
- OurExceptionThrowFunctType functPtr =
+ OurExceptionThrowFunctType functPtr =
reinterpret_cast<OurExceptionThrowFunctType>(
reinterpret_cast<intptr_t>(engine->getPointerToFunction(function)));
-
+
try {
// Run test
(*functPtr)(typeToThrow);
// Catch foreign C++ exception
fprintf(stderr,
"\nrunExceptionThrow(...):In C++ catch OurCppRunException "
- "with reason: %s.\n",
+ "with reason: %s.\n",
exc.what());
}
catch (...) {
- // Catch all exceptions including our generated ones. I'm not sure
- // why this latter functionality should work, as it seems that
- // our exceptions should be foreign to C++ (the _Unwind_Exception::
- // exception_class should be different from the one used by C++), and
- // therefore C++ should ignore the generated exceptions.
-
+ // Catch all exceptions including our generated ones. This latter
+ // functionality works according to the example in rules 1.6.4 of
+ // http://mentorembedded.github.com/cxx-abi/abi-eh.html (v1.22),
+ // given that these will be exceptions foreign to C++
+ // (the _Unwind_Exception::exception_class should be different from
+ // the one used by C++).
fprintf(stderr,
"\nrunExceptionThrow(...):In C++ catch all.\n");
}
// End test functions
//
-typedef llvm::ArrayRef<const llvm::Type*> TypeArray;
+typedef llvm::ArrayRef<llvm::Type*> TypeArray;
-/// This initialization routine creates type info globals and
+/// This initialization routine creates type info globals and
/// adds external function declarations to module.
/// @param numTypeInfos number of linear type info associated type info types
/// to create as GlobalVariable instances, starting with the value 1.
/// @param module code for module instance
/// @param builder builder instance
static void createStandardUtilityFunctions(unsigned numTypeInfos,
- llvm::Module &module,
+ llvm::Module &module,
llvm::IRBuilder<> &builder) {
-
+
llvm::LLVMContext &context = module.getContext();
-
+
// Exception initializations
-
+
// Setup exception catch state
- ourExceptionNotThrownState =
- llvm::ConstantInt::get(llvm::Type::getInt8Ty(context), 0),
- ourExceptionThrownState =
- llvm::ConstantInt::get(llvm::Type::getInt8Ty(context), 1),
- ourExceptionCaughtState =
- llvm::ConstantInt::get(llvm::Type::getInt8Ty(context), 2),
-
-
-
+ ourExceptionNotThrownState =
+ llvm::ConstantInt::get(llvm::Type::getInt8Ty(context), 0),
+ ourExceptionThrownState =
+ llvm::ConstantInt::get(llvm::Type::getInt8Ty(context), 1),
+ ourExceptionCaughtState =
+ llvm::ConstantInt::get(llvm::Type::getInt8Ty(context), 2),
+
+
+
// Create our type info type
- ourTypeInfoType = llvm::StructType::get(context,
+ ourTypeInfoType = llvm::StructType::get(context,
TypeArray(builder.getInt32Ty()));
-
+
+ llvm::Type *caughtResultFieldTypes[] = {
+ builder.getInt8PtrTy(),
+ builder.getInt32Ty()
+ };
+
+ // Create our landingpad result type
+ ourCaughtResultType = llvm::StructType::get(context,
+ TypeArray(caughtResultFieldTypes));
+
// Create OurException type
- ourExceptionType = llvm::StructType::get(context,
+ ourExceptionType = llvm::StructType::get(context,
TypeArray(ourTypeInfoType));
-
+
// Create portion of _Unwind_Exception type
//
// Note: Declaring only a portion of the _Unwind_Exception struct.
// Does this cause problems?
ourUnwindExceptionType =
- llvm::StructType::get(context, TypeArray(builder.getInt64Ty()));
+ llvm::StructType::get(context,
+ TypeArray(builder.getInt64Ty()));
+
struct OurBaseException_t dummyException;
-
+
// Calculate offset of OurException::unwindException member.
- ourBaseFromUnwindOffset = ((uintptr_t) &dummyException) -
- ((uintptr_t) &(dummyException.unwindException));
-
+ ourBaseFromUnwindOffset = ((uintptr_t) &dummyException) -
+ ((uintptr_t) &(dummyException.unwindException));
+
#ifdef DEBUG
fprintf(stderr,
"createStandardUtilityFunctions(...):ourBaseFromUnwindOffset "
"= %lld, sizeof(struct OurBaseException_t) - "
"sizeof(struct _Unwind_Exception) = %lu.\n",
ourBaseFromUnwindOffset,
- sizeof(struct OurBaseException_t) -
+ sizeof(struct OurBaseException_t) -
sizeof(struct _Unwind_Exception));
#endif
-
+
size_t numChars = sizeof(ourBaseExcpClassChars) / sizeof(char);
-
+
// Create our _Unwind_Exception::exception_class value
ourBaseExceptionClass = genClass(ourBaseExcpClassChars, numChars);
-
+
// Type infos
-
+
std::string baseStr = "typeInfo", typeInfoName;
std::ostringstream typeInfoNameBuilder;
std::vector<llvm::Constant*> structVals;
-
+
llvm::Constant *nextStruct;
- llvm::GlobalVariable *nextGlobal = NULL;
-
+
// Generate each type info
//
// Note: First type info is not used.
structVals.clear();
structVals.push_back(llvm::ConstantInt::get(builder.getInt32Ty(), i));
nextStruct = llvm::ConstantStruct::get(ourTypeInfoType, structVals);
-
+
typeInfoNameBuilder.str("");
typeInfoNameBuilder << baseStr << i;
typeInfoName = typeInfoNameBuilder.str();
-
+
// Note: Does not seem to work without allocation
- nextGlobal =
- new llvm::GlobalVariable(module,
- ourTypeInfoType,
- true,
- llvm::GlobalValue::ExternalLinkage,
- nextStruct,
+ new llvm::GlobalVariable(module,
+ ourTypeInfoType,
+ true,
+ llvm::GlobalValue::ExternalLinkage,
+ nextStruct,
typeInfoName);
-
+
ourTypeInfoNames.push_back(typeInfoName);
ourTypeInfoNamesIndex[i] = typeInfoName;
}
-
+
ArgNames argNames;
ArgTypes argTypes;
llvm::Function *funct = NULL;
-
+
// print32Int
-
- const llvm::Type *retType = builder.getVoidTy();
-
+
+ llvm::Type *retType = builder.getVoidTy();
+
argTypes.clear();
argTypes.push_back(builder.getInt32Ty());
- argTypes.push_back(builder.getInt8Ty()->getPointerTo());
-
+ argTypes.push_back(builder.getInt8PtrTy());
+
argNames.clear();
-
- createFunction(module,
- retType,
- argTypes,
- argNames,
- "print32Int",
- llvm::Function::ExternalLinkage,
- true,
+
+ createFunction(module,
+ retType,
+ argTypes,
+ argNames,
+ "print32Int",
+ llvm::Function::ExternalLinkage,
+ true,
false);
-
+
// print64Int
-
+
retType = builder.getVoidTy();
-
+
argTypes.clear();
argTypes.push_back(builder.getInt64Ty());
- argTypes.push_back(builder.getInt8Ty()->getPointerTo());
-
+ argTypes.push_back(builder.getInt8PtrTy());
+
argNames.clear();
-
- createFunction(module,
- retType,
- argTypes,
- argNames,
- "print64Int",
- llvm::Function::ExternalLinkage,
- true,
+
+ createFunction(module,
+ retType,
+ argTypes,
+ argNames,
+ "print64Int",
+ llvm::Function::ExternalLinkage,
+ true,
false);
-
+
// printStr
-
+
retType = builder.getVoidTy();
-
+
argTypes.clear();
- argTypes.push_back(builder.getInt8Ty()->getPointerTo());
-
+ argTypes.push_back(builder.getInt8PtrTy());
+
argNames.clear();
-
- createFunction(module,
- retType,
- argTypes,
- argNames,
- "printStr",
- llvm::Function::ExternalLinkage,
- true,
+
+ createFunction(module,
+ retType,
+ argTypes,
+ argNames,
+ "printStr",
+ llvm::Function::ExternalLinkage,
+ true,
false);
-
+
// throwCppException
-
+
retType = builder.getVoidTy();
-
+
argTypes.clear();
argTypes.push_back(builder.getInt32Ty());
-
+
argNames.clear();
-
- createFunction(module,
- retType,
- argTypes,
- argNames,
- "throwCppException",
- llvm::Function::ExternalLinkage,
- true,
+
+ createFunction(module,
+ retType,
+ argTypes,
+ argNames,
+ "throwCppException",
+ llvm::Function::ExternalLinkage,
+ true,
false);
-
+
// deleteOurException
-
+
retType = builder.getVoidTy();
-
+
argTypes.clear();
- argTypes.push_back(builder.getInt8Ty()->getPointerTo());
-
+ argTypes.push_back(builder.getInt8PtrTy());
+
argNames.clear();
-
- createFunction(module,
- retType,
- argTypes,
- argNames,
- "deleteOurException",
- llvm::Function::ExternalLinkage,
- true,
+
+ createFunction(module,
+ retType,
+ argTypes,
+ argNames,
+ "deleteOurException",
+ llvm::Function::ExternalLinkage,
+ true,
false);
-
+
// createOurException
-
- retType = builder.getInt8Ty()->getPointerTo();
-
+
+ retType = builder.getInt8PtrTy();
+
argTypes.clear();
argTypes.push_back(builder.getInt32Ty());
-
+
argNames.clear();
-
- createFunction(module,
- retType,
- argTypes,
- argNames,
- "createOurException",
- llvm::Function::ExternalLinkage,
- true,
+
+ createFunction(module,
+ retType,
+ argTypes,
+ argNames,
+ "createOurException",
+ llvm::Function::ExternalLinkage,
+ true,
false);
-
+
// _Unwind_RaiseException
-
+
retType = builder.getInt32Ty();
-
+
argTypes.clear();
- argTypes.push_back(builder.getInt8Ty()->getPointerTo());
-
+ argTypes.push_back(builder.getInt8PtrTy());
+
argNames.clear();
-
- funct = createFunction(module,
- retType,
- argTypes,
- argNames,
- "_Unwind_RaiseException",
- llvm::Function::ExternalLinkage,
- true,
+
+ funct = createFunction(module,
+ retType,
+ argTypes,
+ argNames,
+ "_Unwind_RaiseException",
+ llvm::Function::ExternalLinkage,
+ true,
false);
-
- funct->addFnAttr(llvm::Attribute::NoReturn);
-
+
+ funct->setDoesNotReturn();
+
// _Unwind_Resume
-
+
retType = builder.getInt32Ty();
-
+
argTypes.clear();
- argTypes.push_back(builder.getInt8Ty()->getPointerTo());
-
+ argTypes.push_back(builder.getInt8PtrTy());
+
argNames.clear();
-
- funct = createFunction(module,
- retType,
- argTypes,
- argNames,
- "_Unwind_Resume",
- llvm::Function::ExternalLinkage,
- true,
+
+ funct = createFunction(module,
+ retType,
+ argTypes,
+ argNames,
+ "_Unwind_Resume",
+ llvm::Function::ExternalLinkage,
+ true,
false);
-
- funct->addFnAttr(llvm::Attribute::NoReturn);
-
+
+ funct->setDoesNotReturn();
+
// ourPersonality
-
+
retType = builder.getInt32Ty();
-
+
argTypes.clear();
argTypes.push_back(builder.getInt32Ty());
argTypes.push_back(builder.getInt32Ty());
argTypes.push_back(builder.getInt64Ty());
- argTypes.push_back(builder.getInt8Ty()->getPointerTo());
- argTypes.push_back(builder.getInt8Ty()->getPointerTo());
-
+ argTypes.push_back(builder.getInt8PtrTy());
+ argTypes.push_back(builder.getInt8PtrTy());
+
argNames.clear();
-
- createFunction(module,
- retType,
- argTypes,
- argNames,
- "ourPersonality",
- llvm::Function::ExternalLinkage,
- true,
+
+ createFunction(module,
+ retType,
+ argTypes,
+ argNames,
+ "ourPersonality",
+ llvm::Function::ExternalLinkage,
+ true,
false);
-
- // llvm.eh.selector intrinsic
-
- getDeclaration(&module, llvm::Intrinsic::eh_selector);
-
- // llvm.eh.exception intrinsic
-
- getDeclaration(&module, llvm::Intrinsic::eh_exception);
-
+
// llvm.eh.typeid.for intrinsic
-
+
getDeclaration(&module, llvm::Intrinsic::eh_typeid_for);
}
//===----------------------------------------------------------------------===//
/// Demo main routine which takes the type info types to throw. A test will
-/// be run for each given type info type. While type info types with the value
+/// be run for each given type info type. While type info types with the value
/// of -1 will trigger a foreign C++ exception to be thrown; type info types
/// <= 6 and >= 1 will be caught by test functions; and type info types > 6
/// will result in exceptions which pass through to the test harness. All other
" for a full test.\n\n");
return(0);
}
-
+
// If not set, exception handling will not be turned on
- llvm::JITExceptionHandling = true;
-
+ llvm::TargetOptions Opts;
+
llvm::InitializeNativeTarget();
+ llvm::InitializeNativeTargetAsmPrinter();
llvm::LLVMContext &context = llvm::getGlobalContext();
llvm::IRBuilder<> theBuilder(context);
-
+
// Make the module, which holds all the code.
- llvm::Module *module = new llvm::Module("my cool jit", context);
-
+ std::unique_ptr<llvm::Module> Owner =
+ llvm::make_unique<llvm::Module>("my cool jit", context);
+ llvm::Module *module = Owner.get();
+
+ std::unique_ptr<llvm::RTDyldMemoryManager> MemMgr(new llvm::SectionMemoryManager());
+
// Build engine with JIT
- llvm::EngineBuilder factory(module);
+ llvm::EngineBuilder factory(std::move(Owner));
factory.setEngineKind(llvm::EngineKind::JIT);
- factory.setAllocateGVsWithCode(false);
+ factory.setTargetOptions(Opts);
+ factory.setMCJITMemoryManager(std::move(MemMgr));
llvm::ExecutionEngine *executionEngine = factory.create();
-
+
{
- llvm::FunctionPassManager fpm(module);
-
- // Set up the optimizer pipeline.
+ llvm::legacy::FunctionPassManager fpm(module);
+
+ // Set up the optimizer pipeline.
// Start with registering info about how the
// target lays out data structures.
- fpm.add(new llvm::TargetData(*executionEngine->getTargetData()));
-
+ module->setDataLayout(*executionEngine->getDataLayout());
+
// Optimizations turned on
#ifdef ADD_OPT_PASSES
-
+
// Basic AliasAnslysis support for GVN.
fpm.add(llvm::createBasicAliasAnalysisPass());
-
+
// Promote allocas to registers.
fpm.add(llvm::createPromoteMemoryToRegisterPass());
-
+
// Do simple "peephole" optimizations and bit-twiddling optzns.
fpm.add(llvm::createInstructionCombiningPass());
-
+
// Reassociate expressions.
fpm.add(llvm::createReassociatePass());
-
+
// Eliminate Common SubExpressions.
fpm.add(llvm::createGVNPass());
-
- // Simplify the control flow graph (deleting unreachable
+
+ // Simplify the control flow graph (deleting unreachable
// blocks, etc).
fpm.add(llvm::createCFGSimplificationPass());
#endif // ADD_OPT_PASSES
-
+
fpm.doInitialization();
-
+
// Generate test code using function throwCppException(...) as
// the function which throws foreign exceptions.
- llvm::Function *toRun =
- createUnwindExceptionTest(*module,
- theBuilder,
+ llvm::Function *toRun =
+ createUnwindExceptionTest(*module,
+ theBuilder,
fpm,
"throwCppException");
-
+
+ executionEngine->finalizeObject();
+
fprintf(stderr, "\nBegin module dump:\n\n");
-
+
module->dump();
-
+
fprintf(stderr, "\nEnd module dump:\n");
-
+
fprintf(stderr, "\n\nBegin Test:\n");
-
+
for (int i = 1; i < argc; ++i) {
// Run test for each argument whose value is the exception
// type to throw.
- runExceptionThrow(executionEngine,
- toRun,
+ runExceptionThrow(executionEngine,
+ toRun,
(unsigned) strtoul(argv[i], NULL, 10));
}
-
+
fprintf(stderr, "\nEnd Test:\n\n");
- }
-
+ }
+
delete executionEngine;
-
+
return 0;
}
-