//===----------------------------------------------------------------------===//
#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/FormattedStream.h"
-#include "llvm/ADT/SmallString.h"
-#include "llvm/ADT/StringExtras.h"
-#include "llvm/ADT/Twine.h"
using namespace llvm;
DwarfCFIException::DwarfCFIException(AsmPrinter *A)
: DwarfException(A),
- shouldEmitTable(false), shouldEmitMoves(false), shouldEmitTableModule(false)
- {}
+ 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->getExceptionHandlingType() != ExceptionHandling::Dwarf)
- return;
+void DwarfCFIException::endModule() {
+ if (moveTypeModule == AsmPrinter::CFI_M_Debug)
+ Asm->OutStreamer.EmitCFISections(false, true);
- if (!shouldEmitTableModule)
+ if (!Asm->MAI->isExceptionHandlingDwarf())
return;
const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
+
unsigned PerEncoding = TLOF.getPersonalityEncoding();
- // Begin eh frame section.
- Asm->OutStreamer.SwitchSection(TLOF.getEHFrameSection());
+ if ((PerEncoding & 0x70) != dwarf::DW_EH_PE_pcrel)
+ return;
// Emit references to all used personality functions
+ bool AtLeastOne = false;
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));
- Asm->EmitReference(Personalities[i], PerEncoding);
+ if (!Personalities[i])
+ continue;
+ MCSymbol *Sym = Asm->getSymbol(Personalities[i]);
+ TLOF.emitPersonalityValue(Asm->OutStreamer, Asm->TM, Sym);
+ AtLeastOne = true;
+ }
+
+ if (AtLeastOne && !TLOF.isFunctionEHFrameSymbolPrivate()) {
+ // This is a temporary hack to keep sections in the same order they
+ // were before. This lets us produce bit identical outputs while
+ // transitioning to CFI.
+ Asm->OutStreamer.SwitchSection(
+ const_cast<TargetLoweringObjectFile&>(TLOF).getEHFrameSection());
}
}
-/// BeginFunction - Gather pre-function exception information. Assumes it's
+/// 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->getPersonalities()[MMI->getPersonalityIndex()];
- if (shouldEmitMoves) {
- const TargetFrameLowering *TFL = Asm->TM.getFrameLowering();
- Asm->OutStreamer.EmitCFIStartProc();
+ shouldEmitPersonality = hasLandingPads &&
+ PerEncoding != dwarf::DW_EH_PE_omit && Per;
- // Indicate locations of general callee saved registers in frame.
- std::vector<MachineMove> Moves;
- TFL->getInitialFrameState(Moves);
- Asm->EmitCFIFrameMoves(Moves);
- Asm->EmitCFIFrameMoves(MMI->getFrameMoves());
- }
+ unsigned LSDAEncoding = TLOF.getLSDAEncoding();
+ shouldEmitLSDA = shouldEmitPersonality &&
+ LSDAEncoding != dwarf::DW_EH_PE_omit;
- if (!shouldEmitTable)
+ if (!shouldEmitPersonality && !shouldEmitMoves)
return;
- const TargetLoweringObjectFile &TLOF = Asm->getObjFileLowering();
+ Asm->OutStreamer.EmitCFIStartProc(/*IsSimple=*/false);
+
+ // Indicate personality routine, if any.
+ if (!shouldEmitPersonality)
+ return;
+
+ const MCSymbol *Sym =
+ TLOF.getCFIPersonalitySymbol(Per, *Asm->Mang, Asm->TM, MMI);
+ Asm->OutStreamer.EmitCFIPersonality(Sym, PerEncoding);
+
+ Asm->OutStreamer.EmitDebugLabel
+ (Asm->GetTempSymbol("eh_func_begin",
+ Asm->getFunctionNumber()));
// Provide LSDA information.
- unsigned LSDAEncoding = TLOF.getLSDAEncoding();
- if (LSDAEncoding != dwarf::DW_EH_PE_omit)
- Asm->OutStreamer.EmitCFILsda(Asm->GetTempSymbol("exception",
- Asm->getFunctionNumber()),
- LSDAEncoding);
+ if (!shouldEmitLSDA)
+ return;
- // Indicate personality routine, if any.
- unsigned PerEncoding = TLOF.getPersonalityEncoding();
- if (PerEncoding != dwarf::DW_EH_PE_omit &&
- MMI->getPersonalities()[MMI->getPersonalityIndex()])
- Asm->OutStreamer.EmitCFIPersonality(Asm->GetTempSymbol("personality",
- MMI->getPersonalityIndex()),
- PerEncoding);
+ Asm->OutStreamer.EmitCFILsda(Asm->GetTempSymbol("exception",
+ Asm->getFunctionNumber()),
+ LSDAEncoding);
}
-/// EndFunction - Gather and emit post-function exception information.
+/// endFunction - Gather and emit post-function exception information.
///
-void DwarfCFIException::EndFunction() {
- if (!shouldEmitMoves && !shouldEmitTable) return;
+void DwarfCFIException::endFunction(const MachineFunction *) {
+ if (!shouldEmitPersonality && !shouldEmitMoves)
+ return;
- if (shouldEmitMoves)
- Asm->OutStreamer.EmitCFIEndProc();
+ Asm->OutStreamer.EmitCFIEndProc();
+
+ if (!shouldEmitPersonality)
+ return;
Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_func_end",
Asm->getFunctionNumber()));
// Map all labels and get rid of any dead landing pads.
MMI->TidyLandingPads();
- if (shouldEmitTable)
- EmitExceptionTable();
+ EmitExceptionTable();
}
projects / oota-llvm.git / blobdiff