//===----------------------------------------------------------------------===//
#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/MachineLocation.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/MC/MachineLocation.h"
+#include "llvm/Support/Dwarf.h"
+#include "llvm/Support/ErrorHandling.h"
+#include "llvm/Support/FormattedStream.h"
#include "llvm/Target/TargetFrameLowering.h"
#include "llvm/Target/TargetLoweringObjectFile.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetOptions.h"
#include "llvm/Target/TargetRegisterInfo.h"
-#include "llvm/Support/Dwarf.h"
-#include "llvm/Support/ErrorHandling.h"
-#include "llvm/Support/FormattedStream.h"
-#include "llvm/ADT/SmallString.h"
-#include "llvm/ADT/StringExtras.h"
-#include "llvm/ADT/Twine.h"
using namespace llvm;
+DwarfCFIExceptionBase::DwarfCFIExceptionBase(AsmPrinter *A)
+ : EHStreamer(A), shouldEmitCFI(false) {}
+
+void DwarfCFIExceptionBase::markFunctionEnd() {
+ if (shouldEmitCFI)
+ Asm->OutStreamer->EmitCFIEndProc();
+
+ if (MMI->getLandingPads().empty())
+ return;
+
+ // Map all labels and get rid of any dead landing pads.
+ MMI->TidyLandingPads();
+}
+
DwarfCFIException::DwarfCFIException(AsmPrinter *A)
- : DwarfException(A),
- shouldEmitTable(false), shouldEmitMoves(false), shouldEmitTableModule(false)
- {}
+ : DwarfCFIExceptionBase(A), shouldEmitPersonality(false),
+ shouldEmitLSDA(false), shouldEmitMoves(false),
+ moveTypeModule(AsmPrinter::CFI_M_None) {}
DwarfCFIException::~DwarfCFIException() {}
-/// EndModule - Emit all exception information that should come after the
+/// endModule - Emit all exception information that should come after the
/// content.
-void DwarfCFIException::EndModule() {
- if (!Asm->MAI->isExceptionHandlingDwarf())
- return;
+void DwarfCFIException::endModule() {
+ if (moveTypeModule == AsmPrinter::CFI_M_Debug)
+ Asm->OutStreamer->EmitCFISections(false, true);
- if (!shouldEmitTableModule)
+ // SjLj uses this pass and it doesn't need this info.
+ if (!Asm->MAI->usesCFIForEH())
return;
const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
- unsigned PerEncoding = TLOF.getPersonalityEncoding();
- // Begin eh frame section.
- Asm->OutStreamer.SwitchSection(TLOF.getEHFrameSection());
+ unsigned PerEncoding = TLOF.getPersonalityEncoding();
- if ((PerEncoding & 0x70) != dwarf::DW_EH_PE_pcrel)
+ if ((PerEncoding & 0x80) != dwarf::DW_EH_PE_indirect)
return;
// Emit references to all used personality functions
const std::vector<const Function*> &Personalities = MMI->getPersonalities();
for (size_t i = 0, e = Personalities.size(); i != e; ++i) {
- Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("personality", i));
- const MCSymbol *Sym = Asm->Mang->getSymbol(Personalities[i]);
- unsigned Size = Asm->TM.getTargetData()->getPointerSize();
- Asm->OutStreamer.EmitSymbolValue(Sym, Size);
+ if (!Personalities[i])
+ continue;
+ MCSymbol *Sym = Asm->getSymbol(Personalities[i]);
+ TLOF.emitPersonalityValue(*Asm->OutStreamer, Asm->TM, Sym);
}
}
-/// BeginFunction - Gather pre-function exception information. Assumes it's
-/// being emitted immediately after the function entry point.
-void DwarfCFIException::BeginFunction(const MachineFunction *MF) {
- shouldEmitTable = shouldEmitMoves = false;
+void DwarfCFIException::beginFunction(const MachineFunction *MF) {
+ shouldEmitMoves = shouldEmitPersonality = shouldEmitLSDA = false;
// If any landing pads survive, we need an EH table.
- shouldEmitTable = !MMI->getLandingPads().empty();
+ bool hasLandingPads = !MMI->getLandingPads().empty();
// See if we need frame move info.
- shouldEmitMoves =
- !Asm->MF->getFunction()->doesNotThrow() || UnwindTablesMandatory;
+ AsmPrinter::CFIMoveType MoveType = Asm->needsCFIMoves();
+ if (MoveType == AsmPrinter::CFI_M_EH ||
+ (MoveType == AsmPrinter::CFI_M_Debug &&
+ moveTypeModule == AsmPrinter::CFI_M_None))
+ moveTypeModule = MoveType;
- if (shouldEmitMoves || shouldEmitTable)
- // Assumes in correct section after the entry point.
- Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_func_begin",
- Asm->getFunctionNumber()));
+ shouldEmitMoves = MoveType != AsmPrinter::CFI_M_None;
- shouldEmitTableModule |= shouldEmitTable;
+ const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
+ unsigned PerEncoding = TLOF.getPersonalityEncoding();
+ const Function *Per = MMI->getPersonality();
- if (shouldEmitMoves || shouldEmitTable)
- Asm->OutStreamer.EmitCFIStartProc();
+ shouldEmitPersonality = hasLandingPads &&
+ PerEncoding != dwarf::DW_EH_PE_omit && Per;
- if (!shouldEmitTable)
- return;
+ unsigned LSDAEncoding = TLOF.getLSDAEncoding();
+ shouldEmitLSDA = shouldEmitPersonality &&
+ LSDAEncoding != dwarf::DW_EH_PE_omit;
- const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
+ shouldEmitCFI = shouldEmitPersonality || shouldEmitMoves;
+ if (!shouldEmitCFI)
+ return;
- // Provide LSDA information.
- unsigned LSDAEncoding = TLOF.getLSDAEncoding();
- if (LSDAEncoding != dwarf::DW_EH_PE_omit)
- Asm->OutStreamer.EmitCFILsda(Asm->GetTempSymbol("exception",
- Asm->getFunctionNumber()),
- LSDAEncoding);
+ Asm->OutStreamer->EmitCFIStartProc(/*IsSimple=*/false);
// Indicate personality routine, if any.
- unsigned PerEncoding = TLOF.getPersonalityEncoding();
- const Function *Per = MMI->getPersonalities()[MMI->getPersonalityIndex()];
- if (PerEncoding == dwarf::DW_EH_PE_omit || !Per)
+ if (!shouldEmitPersonality)
return;
- const MCSymbol *Sym;
- switch (PerEncoding & 0x70) {
- default:
- report_fatal_error("We do not support this DWARF encoding yet!");
- case dwarf::DW_EH_PE_absptr: {
- Sym = Asm->Mang->getSymbol(Per);
- break;
- }
- case dwarf::DW_EH_PE_pcrel: {
- Sym = Asm->GetTempSymbol("personality",
- MMI->getPersonalityIndex());
- break;
- }
- }
- Asm->OutStreamer.EmitCFIPersonality(Sym, PerEncoding);
-}
-
-/// EndFunction - Gather and emit post-function exception information.
-///
-void DwarfCFIException::EndFunction() {
- if (!shouldEmitMoves && !shouldEmitTable) return;
+ const MCSymbol *Sym =
+ TLOF.getCFIPersonalitySymbol(Per, *Asm->Mang, Asm->TM, MMI);
+ Asm->OutStreamer->EmitCFIPersonality(Sym, PerEncoding);
- if (shouldEmitMoves)
- Asm->OutStreamer.EmitCFIEndProc();
+ // Provide LSDA information.
+ if (!shouldEmitLSDA)
+ return;
- Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_func_end",
- Asm->getFunctionNumber()));
+ Asm->OutStreamer->EmitCFILsda(Asm->getCurExceptionSym(), LSDAEncoding);
+}
- // Map all labels and get rid of any dead landing pads.
- MMI->TidyLandingPads();
+/// endFunction - Gather and emit post-function exception information.
+///
+void DwarfCFIException::endFunction(const MachineFunction *) {
+ if (!shouldEmitPersonality)
+ return;
- if (shouldEmitTable)
- EmitExceptionTable();
+ emitExceptionTable();
}
projects / oota-llvm.git / blobdiff