X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FCodeGen%2FAsmPrinter%2FDwarfException.h;h=a4fd36f0339a2ed3e2af9dbeee3d59f57e471c10;hb=3755781debe4a7feb6486f6d802813daa1b80dda;hp=f6f50255f2e7aaf5eb5884f4d9903f9635c2150f;hpb=bb3e29932d14cc012149a1ab452b88e6f6f5bb49;p=oota-llvm.git diff --git a/lib/CodeGen/AsmPrinter/DwarfException.h b/lib/CodeGen/AsmPrinter/DwarfException.h index f6f50255f2e..a4fd36f0339 100644 --- a/lib/CodeGen/AsmPrinter/DwarfException.h +++ b/lib/CodeGen/AsmPrinter/DwarfException.h @@ -11,189 +11,77 @@ // //===----------------------------------------------------------------------===// -#ifndef LLVM_CODEGEN_ASMPRINTER_DWARFEXCEPTION_H -#define LLVM_CODEGEN_ASMPRINTER_DWARFEXCEPTION_H +#ifndef LLVM_LIB_CODEGEN_ASMPRINTER_DWARFEXCEPTION_H +#define LLVM_LIB_CODEGEN_ASMPRINTER_DWARFEXCEPTION_H -#include "DIE.h" -#include "DwarfPrinter.h" +#include "EHStreamer.h" #include "llvm/CodeGen/AsmPrinter.h" -#include "llvm/ADT/DenseMap.h" -#include namespace llvm { +class MachineFunction; +class ARMTargetStreamer; -struct LandingPadInfo; -class MachineModuleInfo; -class MCAsmInfo; -class Timer; -class raw_ostream; +class DwarfCFIExceptionBase : public EHStreamer { +protected: + DwarfCFIExceptionBase(AsmPrinter *A); -//===----------------------------------------------------------------------===// -/// DwarfException - Emits Dwarf exception handling directives. -/// -class VISIBILITY_HIDDEN DwarfException : public Dwarf { - struct FunctionEHFrameInfo { - std::string FnName; - unsigned Number; - unsigned PersonalityIndex; - bool hasCalls; - bool hasLandingPads; - std::vector Moves; - const Function * function; - - FunctionEHFrameInfo(const std::string &FN, unsigned Num, unsigned P, - bool hC, bool hL, - const std::vector &M, - const Function *f): - FnName(FN), Number(Num), PersonalityIndex(P), - hasCalls(hC), hasLandingPads(hL), Moves(M), function (f) { } - }; - - std::vector EHFrames; - - /// UsesLSDA - Indicates whether an FDE that uses the CIE at the given index - /// uses an LSDA. If so, then we need to encode that information in the CIE's - /// augmentation. - DenseMap UsesLSDA; - - /// shouldEmitTable - Per-function flag to indicate if EH tables should - /// be emitted. - bool shouldEmitTable; - - /// shouldEmitMoves - Per-function flag to indicate if frame moves info - /// should be emitted. + /// Per-function flag to indicate if frame CFI info should be emitted. + bool shouldEmitCFI; + + void markFunctionEnd() override; +}; + +class DwarfCFIException : public DwarfCFIExceptionBase { + /// Per-function flag to indicate if .cfi_personality should be emitted. + bool shouldEmitPersonality; + + /// Per-function flag to indicate if .cfi_lsda should be emitted. + bool shouldEmitLSDA; + + /// Per-function flag to indicate if frame moves info should be emitted. bool shouldEmitMoves; - /// shouldEmitTableModule - Per-module flag to indicate if EH tables - /// should be emitted. - bool shouldEmitTableModule; - - /// shouldEmitFrameModule - Per-module flag to indicate if frame moves - /// should be emitted. - bool shouldEmitMovesModule; - - /// ExceptionTimer - Timer for the Dwarf exception writer. - Timer *ExceptionTimer; - - /// SizeOfEncodedValue - Return the size of the encoding in bytes. - unsigned SizeOfEncodedValue(unsigned Encoding); - - /// EmitCIE - Emit a Common Information Entry (CIE). This holds information - /// that is shared among many Frame Description Entries. There is at least - /// one CIE in every non-empty .debug_frame section. - void EmitCIE(const Function *Personality, unsigned Index); - - /// EmitFDE - Emit the Frame Description Entry (FDE) for the function. - void EmitFDE(const FunctionEHFrameInfo &EHFrameInfo); - - /// EmitExceptionTable - Emit landing pads and actions. - /// - /// The general organization of the table is complex, but the basic concepts - /// are easy. First there is a header which describes the location and - /// organization of the three components that follow. - /// 1. The landing pad site information describes the range of code covered - /// by the try. In our case it's an accumulation of the ranges covered - /// by the invokes in the try. There is also a reference to the landing - /// pad that handles the exception once processed. Finally an index into - /// the actions table. - /// 2. The action table, in our case, is composed of pairs of type ids - /// and next action offset. Starting with the action index from the - /// landing pad site, each type Id is checked for a match to the current - /// exception. If it matches then the exception and type id are passed - /// on to the landing pad. Otherwise the next action is looked up. This - /// chain is terminated with a next action of zero. If no type id is - /// found the the frame is unwound and handling continues. - /// 3. Type id table contains references to all the C++ typeinfo for all - /// catches in the function. This tables is reversed indexed base 1. - - /// SharedTypeIds - How many leading type ids two landing pads have in common. - static unsigned SharedTypeIds(const LandingPadInfo *L, - const LandingPadInfo *R); - - /// PadLT - Order landing pads lexicographically by type id. - static bool PadLT(const LandingPadInfo *L, const LandingPadInfo *R); - - struct KeyInfo { - static inline unsigned getEmptyKey() { return -1U; } - static inline unsigned getTombstoneKey() { return -2U; } - static unsigned getHashValue(const unsigned &Key) { return Key; } - static bool isEqual(unsigned LHS, unsigned RHS) { return LHS == RHS; } - static bool isPod() { return true; } - }; - - /// PadRange - Structure holding a try-range and the associated landing pad. - struct PadRange { - // The index of the landing pad. - unsigned PadIndex; - // The index of the begin and end labels in the landing pad's label lists. - unsigned RangeIndex; - }; - - typedef DenseMap RangeMapType; - - /// ActionEntry - Structure describing an entry in the actions table. - struct ActionEntry { - int ValueForTypeID; // The value to write - may not be equal to the type id. - int NextAction; - struct ActionEntry *Previous; - }; - - /// CallSiteEntry - Structure describing an entry in the call-site table. - struct CallSiteEntry { - // The 'try-range' is BeginLabel .. EndLabel. - unsigned BeginLabel; // zero indicates the start of the function. - unsigned EndLabel; // zero indicates the end of the function. - - // The landing pad starts at PadLabel. - unsigned PadLabel; // zero indicates that there is no landing pad. - unsigned Action; - }; - - /// ComputeActionsTable - Compute the actions table and gather the first - /// action index for each landing pad site. - unsigned ComputeActionsTable(const SmallVectorImpl&LPs, - SmallVectorImpl &Actions, - SmallVectorImpl &FirstActions); - - /// ComputeCallSiteTable - Compute the call-site table. The entry for an - /// invoke has a try-range containing the call, a non-zero landing pad and an - /// appropriate action. The entry for an ordinary call has a try-range - /// containing the call and zero for the landing pad and the action. Calls - /// marked 'nounwind' have no entry and must not be contained in the try-range - /// of any entry - they form gaps in the table. Entries must be ordered by - /// try-range address. - void ComputeCallSiteTable(SmallVectorImpl &CallSites, - const RangeMapType &PadMap, - const SmallVectorImpl &LPs, - const SmallVectorImpl &FirstActions); - void EmitExceptionTable(); + AsmPrinter::CFIMoveType moveTypeModule; public: //===--------------------------------------------------------------------===// // Main entry points. // - DwarfException(raw_ostream &OS, AsmPrinter *A, const MCAsmInfo *T); - virtual ~DwarfException(); - - /// BeginModule - Emit all exception information that should come prior to the - /// content. - void BeginModule(Module *m, MachineModuleInfo *mmi) { - this->M = m; - this->MMI = mmi; - } - - /// EndModule - Emit all exception information that should come after the - /// content. - void EndModule(); - - /// BeginFunction - Gather pre-function exception information. Assumes being - /// emitted immediately after the function entry point. - void BeginFunction(MachineFunction *MF); - - /// EndFunction - Gather and emit post-function exception information. - void EndFunction(); + DwarfCFIException(AsmPrinter *A); + ~DwarfCFIException() override; + + /// Emit all exception information that should come after the content. + void endModule() override; + + /// Gather pre-function exception information. Assumes being emitted + /// immediately after the function entry point. + void beginFunction(const MachineFunction *MF) override; + + /// Gather and emit post-function exception information. + void endFunction(const MachineFunction *) override; }; +class ARMException : public DwarfCFIExceptionBase { + void emitTypeInfos(unsigned TTypeEncoding) override; + ARMTargetStreamer &getTargetStreamer(); + +public: + //===--------------------------------------------------------------------===// + // Main entry points. + // + ARMException(AsmPrinter *A); + ~ARMException() override; + + /// Emit all exception information that should come after the content. + void endModule() override; + + /// Gather pre-function exception information. Assumes being emitted + /// immediately after the function entry point. + void beginFunction(const MachineFunction *MF) override; + + /// Gather and emit post-function exception information. + void endFunction(const MachineFunction *) override; +}; } // End of namespace llvm #endif