//===----------------------------------------------------------------------===//
#include "DwarfException.h"
-#include "llvm/Module.h"
+#include "llvm/ADT/SmallString.h"
+#include "llvm/ADT/StringExtras.h"
+#include "llvm/ADT/Twine.h"
#include "llvm/CodeGen/AsmPrinter.h"
-#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/MachineFrameInfo.h"
#include "llvm/CodeGen/MachineFunction.h"
+#include "llvm/CodeGen/MachineModuleInfo.h"
+#include "llvm/IR/DataLayout.h"
+#include "llvm/IR/Mangler.h"
+#include "llvm/IR/Module.h"
#include "llvm/MC/MCAsmInfo.h"
#include "llvm/MC/MCContext.h"
#include "llvm/MC/MCExpr.h"
#include "llvm/MC/MCSection.h"
#include "llvm/MC/MCStreamer.h"
#include "llvm/MC/MCSymbol.h"
-#include "llvm/Target/Mangler.h"
-#include "llvm/Target/TargetData.h"
-#include "llvm/Target/TargetFrameLowering.h"
-#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/TargetOptions.h"
-#include "llvm/Target/TargetRegisterInfo.h"
#include "llvm/Support/CommandLine.h"
#include "llvm/Support/Dwarf.h"
#include "llvm/Support/FormattedStream.h"
-#include "llvm/ADT/SmallString.h"
-#include "llvm/ADT/StringExtras.h"
-#include "llvm/ADT/Twine.h"
+#include "llvm/Target/TargetFrameLowering.h"
+#include "llvm/Target/TargetOptions.h"
+#include "llvm/Target/TargetRegisterInfo.h"
using namespace llvm;
-cl::opt<ExceptionHandling::ARMEHABIMode>
-EnableARMEHABI("arm-enable-ehabi", cl::Hidden,
- cl::desc("Generate ARM EHABI tables:"),
- cl::values(clEnumValN(ExceptionHandling::ARMEHABIDisabled, "no",
- "Do not generate ARM EHABI tables"),
- clEnumValN(ExceptionHandling::ARMEHABIUnwind, "unwind",
- "Emit unwinding instructions, but not descriptors"),
- clEnumValN(ExceptionHandling::ARMEHABIFull, "full",
- "Generate full ARM EHABI tables"),
- clEnumValEnd));
-
-
-ARMException::ARMException(AsmPrinter *A)
- : DwarfException(A),
- shouldEmitTable(false), shouldEmitMoves(false), shouldEmitTableModule(false)
- {}
+ARMException::ARMException(AsmPrinter *A) : DwarfCFIExceptionBase(A) {}
ARMException::~ARMException() {}
-void ARMException::EndModule() {
+ARMTargetStreamer &ARMException::getTargetStreamer() {
+ MCTargetStreamer &TS = *Asm->OutStreamer->getTargetStreamer();
+ return static_cast<ARMTargetStreamer &>(TS);
}
-/// BeginFunction - Gather pre-function exception information. Assumes it's
-/// being emitted immediately after the function entry point.
-void ARMException::BeginFunction(const MachineFunction *MF) {
- Asm->OutStreamer.EmitFnStart();
- if (Asm->MF->getFunction()->needsUnwindTableEntry())
- Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_func_begin",
- Asm->getFunctionNumber()));
+/// endModule - Emit all exception information that should come after the
+/// content.
+void ARMException::endModule() {
+ if (shouldEmitCFI)
+ Asm->OutStreamer->EmitCFISections(false, true);
}
-/// EndFunction - Gather and emit post-function exception information.
-///
-void ARMException::EndFunction() {
- if (!Asm->MF->getFunction()->needsUnwindTableEntry())
- Asm->OutStreamer.EmitCantUnwind();
- else {
- Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_func_end",
- Asm->getFunctionNumber()));
+void ARMException::beginFunction(const MachineFunction *MF) {
+ if (Asm->MAI->getExceptionHandlingType() == ExceptionHandling::ARM)
+ getTargetStreamer().emitFnStart();
+ // See if we need call frame info.
+ AsmPrinter::CFIMoveType MoveType = Asm->needsCFIMoves();
+ assert(MoveType != AsmPrinter::CFI_M_EH &&
+ "non-EH CFI not yet supported in prologue with EHABI lowering");
+ if (MoveType == AsmPrinter::CFI_M_Debug) {
+ shouldEmitCFI = true;
+ Asm->OutStreamer->EmitCFIStartProc(false);
+ }
+}
+/// endFunction - Gather and emit post-function exception information.
+///
+void ARMException::endFunction(const MachineFunction *MF) {
+ ARMTargetStreamer &ATS = getTargetStreamer();
+ const Function *F = MF->getFunction();
+ const Function *Per = nullptr;
+ if (F->hasPersonalityFn())
+ Per = dyn_cast<Function>(F->getPersonalityFn()->stripPointerCasts());
+ assert(!MMI->getPersonality() || Per == MMI->getPersonality());
+ bool forceEmitPersonality =
+ F->hasPersonalityFn() && !isNoOpWithoutInvoke(classifyEHPersonality(Per)) &&
+ F->needsUnwindTableEntry();
+ bool shouldEmitPersonality = forceEmitPersonality ||
+ !MMI->getLandingPads().empty();
+ if (!Asm->MF->getFunction()->needsUnwindTableEntry() &&
+ !shouldEmitPersonality)
+ ATS.emitCantUnwind();
+ else if (shouldEmitPersonality) {
// Emit references to personality.
- if (const Function * Personality =
- MMI->getPersonalities()[MMI->getPersonalityIndex()]) {
- MCSymbol *PerSym = Asm->Mang->getSymbol(Personality);
- Asm->OutStreamer.EmitSymbolAttribute(PerSym, MCSA_Global);
- Asm->OutStreamer.EmitPersonality(PerSym);
+ if (Per) {
+ MCSymbol *PerSym = Asm->getSymbol(Per);
+ Asm->OutStreamer->EmitSymbolAttribute(PerSym, MCSA_Global);
+ ATS.emitPersonality(PerSym);
}
- if (EnableARMEHABI == ExceptionHandling::ARMEHABIFull) {
- // Map all labels and get rid of any dead landing pads.
- MMI->TidyLandingPads();
+ // Emit .handlerdata directive.
+ ATS.emitHandlerData();
- Asm->OutStreamer.EmitHandlerData();
+ // Emit actual exception table
+ emitExceptionTable();
+ }
- // Emit actual exception table
- EmitExceptionTable();
- }
+ if (Asm->MAI->getExceptionHandlingType() == ExceptionHandling::ARM)
+ ATS.emitFnEnd();
+}
+
+void ARMException::emitTypeInfos(unsigned TTypeEncoding) {
+ const std::vector<const GlobalValue *> &TypeInfos = MMI->getTypeInfos();
+ const std::vector<unsigned> &FilterIds = MMI->getFilterIds();
+
+ bool VerboseAsm = Asm->OutStreamer->isVerboseAsm();
+
+ int Entry = 0;
+ // Emit the Catch TypeInfos.
+ if (VerboseAsm && !TypeInfos.empty()) {
+ Asm->OutStreamer->AddComment(">> Catch TypeInfos <<");
+ Asm->OutStreamer->AddBlankLine();
+ Entry = TypeInfos.size();
+ }
+
+ for (std::vector<const GlobalValue *>::const_reverse_iterator
+ I = TypeInfos.rbegin(), E = TypeInfos.rend(); I != E; ++I) {
+ const GlobalValue *GV = *I;
+ if (VerboseAsm)
+ Asm->OutStreamer->AddComment("TypeInfo " + Twine(Entry--));
+ Asm->EmitTTypeReference(GV, TTypeEncoding);
}
- Asm->OutStreamer.EmitFnEnd();
+ // Emit the Exception Specifications.
+ if (VerboseAsm && !FilterIds.empty()) {
+ Asm->OutStreamer->AddComment(">> Filter TypeInfos <<");
+ Asm->OutStreamer->AddBlankLine();
+ Entry = 0;
+ }
+ for (std::vector<unsigned>::const_iterator
+ I = FilterIds.begin(), E = FilterIds.end(); I < E; ++I) {
+ unsigned TypeID = *I;
+ if (VerboseAsm) {
+ --Entry;
+ if (TypeID != 0)
+ Asm->OutStreamer->AddComment("FilterInfo " + Twine(Entry));
+ }
+
+ Asm->EmitTTypeReference((TypeID == 0 ? nullptr : TypeInfos[TypeID - 1]),
+ TTypeEncoding);
+ }
}
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