DwarfException.cpp revision 6a66e585b8242b9764ec3343309697d24bb1e312
1eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling//===-- CodeGen/AsmPrinter/DwarfException.cpp - Dwarf Exception Impl ------===// 2eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling// 3eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling// The LLVM Compiler Infrastructure 4eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling// 5eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling// This file is distributed under the University of Illinois Open Source 6eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling// License. See LICENSE.TXT for details. 7eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling// 8eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling//===----------------------------------------------------------------------===// 9eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling// 10eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling// This file contains support for writing dwarf exception info into asm files. 11eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling// 12eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling//===----------------------------------------------------------------------===// 13eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 14eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling#include "DwarfException.h" 15eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling#include "llvm/Module.h" 16eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling#include "llvm/CodeGen/MachineModuleInfo.h" 17eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling#include "llvm/CodeGen/MachineFrameInfo.h" 18eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling#include "llvm/CodeGen/MachineLocation.h" 19eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling#include "llvm/Support/Dwarf.h" 20eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling#include "llvm/Support/Timer.h" 21eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling#include "llvm/Support/raw_ostream.h" 22eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling#include "llvm/Target/TargetAsmInfo.h" 23eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling#include "llvm/Target/TargetData.h" 24eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling#include "llvm/Target/TargetFrameInfo.h" 25d5bbb07ec806e6fa1e804afd7073987fdacc83e4Chris Lattner#include "llvm/Target/TargetLoweringObjectFile.h" 26eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling#include "llvm/Target/TargetOptions.h" 27d5bbb07ec806e6fa1e804afd7073987fdacc83e4Chris Lattner#include "llvm/Target/TargetRegisterInfo.h" 28eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling#include "llvm/ADT/StringExtras.h" 29eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendlingusing namespace llvm; 30eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 31eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendlingstatic TimerGroup &getDwarfTimerGroup() { 32eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling static TimerGroup DwarfTimerGroup("Dwarf Exception"); 33eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling return DwarfTimerGroup; 34eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling} 35eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 36bc0d23afae781c45f92865c1c27bed0ce51fe545Bill WendlingDwarfException::DwarfException(raw_ostream &OS, AsmPrinter *A, 37bc0d23afae781c45f92865c1c27bed0ce51fe545Bill Wendling const TargetAsmInfo *T) 38bc0d23afae781c45f92865c1c27bed0ce51fe545Bill Wendling : Dwarf(OS, A, T, "eh"), shouldEmitTable(false), shouldEmitMoves(false), 39bc0d23afae781c45f92865c1c27bed0ce51fe545Bill Wendling shouldEmitTableModule(false), shouldEmitMovesModule(false), 40bc0d23afae781c45f92865c1c27bed0ce51fe545Bill Wendling ExceptionTimer(0) { 41bc0d23afae781c45f92865c1c27bed0ce51fe545Bill Wendling if (TimePassesIsEnabled) 42bc0d23afae781c45f92865c1c27bed0ce51fe545Bill Wendling ExceptionTimer = new Timer("Dwarf Exception Writer", 43bc0d23afae781c45f92865c1c27bed0ce51fe545Bill Wendling getDwarfTimerGroup()); 44bc0d23afae781c45f92865c1c27bed0ce51fe545Bill Wendling} 45bc0d23afae781c45f92865c1c27bed0ce51fe545Bill Wendling 46bc0d23afae781c45f92865c1c27bed0ce51fe545Bill WendlingDwarfException::~DwarfException() { 47bc0d23afae781c45f92865c1c27bed0ce51fe545Bill Wendling delete ExceptionTimer; 48bc0d23afae781c45f92865c1c27bed0ce51fe545Bill Wendling} 49bc0d23afae781c45f92865c1c27bed0ce51fe545Bill Wendling 50eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendlingvoid DwarfException::EmitCommonEHFrame(const Function *Personality, 51eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling unsigned Index) { 52eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // Size and sign of stack growth. 53eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling int stackGrowth = 54eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->TM.getFrameInfo()->getStackGrowthDirection() == 55eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling TargetFrameInfo::StackGrowsUp ? 56eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling TD->getPointerSize() : -TD->getPointerSize(); 57eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 58eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // Begin eh frame section. 596a66e585b8242b9764ec3343309697d24bb1e312Chris Lattner // FIXME: THIS IS A HORRIBLE HACK. MingW isn't specifying an EHFrame section. 606a66e585b8242b9764ec3343309697d24bb1e312Chris Lattner if (const MCSection *EHFrameSec = 616a66e585b8242b9764ec3343309697d24bb1e312Chris Lattner Asm->getObjFileLowering().getEHFrameSection()) 626a66e585b8242b9764ec3343309697d24bb1e312Chris Lattner Asm->SwitchToSection(EHFrameSec); 63eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 64e2cf37b88c089a71727b3ecd466856f0cd638813Chris Lattner if (TAI->is_EHSymbolPrivate()) 65e2cf37b88c089a71727b3ecd466856f0cd638813Chris Lattner O << TAI->getPrivateGlobalPrefix(); 66eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 67eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling O << "EH_frame" << Index << ":\n"; 68eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling EmitLabel("section_eh_frame", Index); 69eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 70eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // Define base labels. 71eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling EmitLabel("eh_frame_common", Index); 72eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 73eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // Define the eh frame length. 74eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling EmitDifference("eh_frame_common_end", Index, 75eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling "eh_frame_common_begin", Index, true); 76eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EOL("Length of Common Information Entry"); 77eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 78eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // EH frame header. 79eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling EmitLabel("eh_frame_common_begin", Index); 80eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EmitInt32((int)0); 81eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EOL("CIE Identifier Tag"); 82eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EmitInt8(dwarf::DW_CIE_VERSION); 83eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EOL("CIE Version"); 84eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 85eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // The personality presence indicates that language specific information will 86eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // show up in the eh frame. 87eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EmitString(Personality ? "zPLR" : "zR"); 88eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EOL("CIE Augmentation"); 89eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 90eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // Round out reader. 91eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EmitULEB128Bytes(1); 92eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EOL("CIE Code Alignment Factor"); 93eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EmitSLEB128Bytes(stackGrowth); 94eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EOL("CIE Data Alignment Factor"); 95eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EmitInt8(RI->getDwarfRegNum(RI->getRARegister(), true)); 96eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EOL("CIE Return Address Column"); 97eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 98eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // If there is a personality, we need to indicate the functions location. 99eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling if (Personality) { 100eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EmitULEB128Bytes(7); 101eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EOL("Augmentation Size"); 102eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 103eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling if (TAI->getNeedsIndirectEncoding()) { 104eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EmitInt8(dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4 | 105eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling dwarf::DW_EH_PE_indirect); 106eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EOL("Personality (pcrel sdata4 indirect)"); 107eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling } else { 108eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EmitInt8(dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4); 109eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EOL("Personality (pcrel sdata4)"); 110eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling } 111eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 112eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling PrintRelDirective(true); 113eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling O << TAI->getPersonalityPrefix(); 114eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EmitExternalGlobal((const GlobalVariable *)(Personality)); 115eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling O << TAI->getPersonalitySuffix(); 116eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling if (strcmp(TAI->getPersonalitySuffix(), "+4@GOTPCREL")) 117eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling O << "-" << TAI->getPCSymbol(); 118eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EOL("Personality"); 119eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 120eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EmitInt8(dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4); 121eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EOL("LSDA Encoding (pcrel sdata4)"); 122eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 123eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EmitInt8(dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4); 124eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EOL("FDE Encoding (pcrel sdata4)"); 125eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling } else { 126eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EmitULEB128Bytes(1); 127eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EOL("Augmentation Size"); 128eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 129eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EmitInt8(dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4); 130eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EOL("FDE Encoding (pcrel sdata4)"); 131eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling } 132eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 133eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // Indicate locations of general callee saved registers in frame. 134eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling std::vector<MachineMove> Moves; 135eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling RI->getInitialFrameState(Moves); 136eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling EmitFrameMoves(NULL, 0, Moves, true); 137eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 138eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // On Darwin the linker honors the alignment of eh_frame, which means it must 139eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // be 8-byte on 64-bit targets to match what gcc does. Otherwise you get 140eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // holes which confuse readers of eh_frame. 141eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EmitAlignment(TD->getPointerSize() == sizeof(int32_t) ? 2 : 3, 142eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 0, 0, false); 143eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling EmitLabel("eh_frame_common_end", Index); 144eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 145eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EOL(); 146eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling} 147eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 148eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling/// EmitEHFrame - Emit function exception frame information. 149eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling/// 150eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendlingvoid DwarfException::EmitEHFrame(const FunctionEHFrameInfo &EHFrameInfo) { 151eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling assert(!EHFrameInfo.function->hasAvailableExternallyLinkage() && 152eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling "Should not emit 'available externally' functions at all"); 153eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 1543e0f60be46cb5363d4375f26a5e27d1dcd9867fbChris Lattner const Function *TheFunc = EHFrameInfo.function; 1553e0f60be46cb5363d4375f26a5e27d1dcd9867fbChris Lattner 1566a66e585b8242b9764ec3343309697d24bb1e312Chris Lattner // FIXME: THIS IS A HORRIBLE HACK. MingW isn't specifying an EHFrame section. 1576a66e585b8242b9764ec3343309697d24bb1e312Chris Lattner if (const MCSection *EHFrameSec = 1586a66e585b8242b9764ec3343309697d24bb1e312Chris Lattner Asm->getObjFileLowering().getEHFrameSection()) 1596a66e585b8242b9764ec3343309697d24bb1e312Chris Lattner Asm->SwitchToSection(EHFrameSec); 1606a66e585b8242b9764ec3343309697d24bb1e312Chris Lattner 161eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // Externally visible entry into the functions eh frame info. If the 162eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // corresponding function is static, this should not be externally visible. 1633e0f60be46cb5363d4375f26a5e27d1dcd9867fbChris Lattner if (!TheFunc->hasLocalLinkage()) 164eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling if (const char *GlobalEHDirective = TAI->getGlobalEHDirective()) 165eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling O << GlobalEHDirective << EHFrameInfo.FnName << "\n"; 166eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 167eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // If corresponding function is weak definition, this should be too. 1683e0f60be46cb5363d4375f26a5e27d1dcd9867fbChris Lattner if (TheFunc->isWeakForLinker() && TAI->getWeakDefDirective()) 169eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling O << TAI->getWeakDefDirective() << EHFrameInfo.FnName << "\n"; 170eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 171eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // If there are no calls then you can't unwind. This may mean we can omit the 172eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // EH Frame, but some environments do not handle weak absolute symbols. If 173eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // UnwindTablesMandatory is set we cannot do this optimization; the unwind 174eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // info is to be available for non-EH uses. 1753e0f60be46cb5363d4375f26a5e27d1dcd9867fbChris Lattner if (!EHFrameInfo.hasCalls && !UnwindTablesMandatory && 1763e0f60be46cb5363d4375f26a5e27d1dcd9867fbChris Lattner (!TheFunc->isWeakForLinker() || 177eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling !TAI->getWeakDefDirective() || 178eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling TAI->getSupportsWeakOmittedEHFrame())) { 179eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling O << EHFrameInfo.FnName << " = 0\n"; 180eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // This name has no connection to the function, so it might get 181eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // dead-stripped when the function is not, erroneously. Prohibit 182eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // dead-stripping unconditionally. 183eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling if (const char *UsedDirective = TAI->getUsedDirective()) 184eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling O << UsedDirective << EHFrameInfo.FnName << "\n\n"; 185eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling } else { 186eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling O << EHFrameInfo.FnName << ":\n"; 187eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 188eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // EH frame header. 189eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling EmitDifference("eh_frame_end", EHFrameInfo.Number, 190eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling "eh_frame_begin", EHFrameInfo.Number, true); 191eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EOL("Length of Frame Information Entry"); 192eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 193eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling EmitLabel("eh_frame_begin", EHFrameInfo.Number); 194eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 195a4ff5e48fc6a4718d3a2af8654cfc06a17310aedChris Lattner EmitSectionOffset("eh_frame_begin", "eh_frame_common", 196a4ff5e48fc6a4718d3a2af8654cfc06a17310aedChris Lattner EHFrameInfo.Number, EHFrameInfo.PersonalityIndex, 197a4ff5e48fc6a4718d3a2af8654cfc06a17310aedChris Lattner true, true, false); 198eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 199eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EOL("FDE CIE offset"); 200eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 201eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling EmitReference("eh_func_begin", EHFrameInfo.Number, true, true); 202eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EOL("FDE initial location"); 203eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling EmitDifference("eh_func_end", EHFrameInfo.Number, 204eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling "eh_func_begin", EHFrameInfo.Number, true); 205eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EOL("FDE address range"); 206eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 207eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // If there is a personality and landing pads then point to the language 208eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // specific data area in the exception table. 209eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling if (EHFrameInfo.PersonalityIndex) { 210eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EmitULEB128Bytes(4); 211eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EOL("Augmentation size"); 212eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 213eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling if (EHFrameInfo.hasLandingPads) 214eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling EmitReference("exception", EHFrameInfo.Number, true, true); 215eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling else 216eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EmitInt32((int)0); 217eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EOL("Language Specific Data Area"); 218eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling } else { 219eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EmitULEB128Bytes(0); 220eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EOL("Augmentation size"); 221eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling } 222eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 223eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // Indicate locations of function specific callee saved registers in frame. 224eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling EmitFrameMoves("eh_func_begin", EHFrameInfo.Number, EHFrameInfo.Moves, 225eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling true); 226eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 227eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // On Darwin the linker honors the alignment of eh_frame, which means it 228eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // must be 8-byte on 64-bit targets to match what gcc does. Otherwise you 229eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // get holes which confuse readers of eh_frame. 230eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EmitAlignment(TD->getPointerSize() == sizeof(int32_t) ? 2 : 3, 231eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 0, 0, false); 232eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling EmitLabel("eh_frame_end", EHFrameInfo.Number); 233eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 234eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // If the function is marked used, this table should be also. We cannot 235eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // make the mark unconditional in this case, since retaining the table also 236eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // retains the function in this case, and there is code around that depends 237eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // on unused functions (calling undefined externals) being dead-stripped to 238eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // link correctly. Yes, there really is. 239401e10c4fbfcdcfade5065093e2ca97f69a1d144Chris Lattner if (MMI->isUsedFunction(EHFrameInfo.function)) 240eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling if (const char *UsedDirective = TAI->getUsedDirective()) 241eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling O << UsedDirective << EHFrameInfo.FnName << "\n\n"; 242eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling } 243eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling} 244eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 245eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling/// SharedTypeIds - How many leading type ids two landing pads have in common. 246eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendlingunsigned DwarfException::SharedTypeIds(const LandingPadInfo *L, 247eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling const LandingPadInfo *R) { 248eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling const std::vector<int> &LIds = L->TypeIds, &RIds = R->TypeIds; 249eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling unsigned LSize = LIds.size(), RSize = RIds.size(); 250eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling unsigned MinSize = LSize < RSize ? LSize : RSize; 251eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling unsigned Count = 0; 252eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 253eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling for (; Count != MinSize; ++Count) 254eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling if (LIds[Count] != RIds[Count]) 255eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling return Count; 256eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 257eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling return Count; 258eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling} 259eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 260eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling/// PadLT - Order landing pads lexicographically by type id. 261eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendlingbool DwarfException::PadLT(const LandingPadInfo *L, const LandingPadInfo *R) { 262eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling const std::vector<int> &LIds = L->TypeIds, &RIds = R->TypeIds; 263eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling unsigned LSize = LIds.size(), RSize = RIds.size(); 264eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling unsigned MinSize = LSize < RSize ? LSize : RSize; 265eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 266eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling for (unsigned i = 0; i != MinSize; ++i) 267eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling if (LIds[i] != RIds[i]) 268eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling return LIds[i] < RIds[i]; 269eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 270eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling return LSize < RSize; 271eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling} 272eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 273d4609622ade8d0ebaf57fd70700c2fedf0b3d165Bill Wendling/// ComputeActionsTable - Compute the actions table and gather the first action 274d4609622ade8d0ebaf57fd70700c2fedf0b3d165Bill Wendling/// index for each landing pad site. 275ade025c65c12503aba161a4fa399fd97414abaffBill Wendlingunsigned DwarfException:: 276ade025c65c12503aba161a4fa399fd97414abaffBill WendlingComputeActionsTable(const SmallVectorImpl<const LandingPadInfo*> &LandingPads, 277ade025c65c12503aba161a4fa399fd97414abaffBill Wendling SmallVectorImpl<ActionEntry> &Actions, 278ade025c65c12503aba161a4fa399fd97414abaffBill Wendling SmallVectorImpl<unsigned> &FirstActions) { 2795e953ddfa3abdd684c8a43f9c9c144f584ec7d6fBill Wendling // Negative type IDs index into FilterIds. Positive type IDs index into 2805e953ddfa3abdd684c8a43f9c9c144f584ec7d6fBill Wendling // TypeInfos. The value written for a positive type ID is just the type ID 2815e953ddfa3abdd684c8a43f9c9c144f584ec7d6fBill Wendling // itself. For a negative type ID, however, the value written is the 282eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // (negative) byte offset of the corresponding FilterIds entry. The byte 2835e953ddfa3abdd684c8a43f9c9c144f584ec7d6fBill Wendling // offset is usually equal to the type ID (because the FilterIds entries are 2845e953ddfa3abdd684c8a43f9c9c144f584ec7d6fBill Wendling // written using a variable width encoding, which outputs one byte per entry 2855e953ddfa3abdd684c8a43f9c9c144f584ec7d6fBill Wendling // as long as the value written is not too large) but can differ. This kind 2865e953ddfa3abdd684c8a43f9c9c144f584ec7d6fBill Wendling // of complication does not occur for positive type IDs because type infos are 287eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // output using a fixed width encoding. FilterOffsets[i] holds the byte 288eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // offset corresponding to FilterIds[i]. 289409914b773ffd53d53d214394d5636a76f673186Bill Wendling 290409914b773ffd53d53d214394d5636a76f673186Bill Wendling const std::vector<unsigned> &FilterIds = MMI->getFilterIds(); 291eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling SmallVector<int, 16> FilterOffsets; 292eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling FilterOffsets.reserve(FilterIds.size()); 293eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling int Offset = -1; 294409914b773ffd53d53d214394d5636a76f673186Bill Wendling 295409914b773ffd53d53d214394d5636a76f673186Bill Wendling for (std::vector<unsigned>::const_iterator 296409914b773ffd53d53d214394d5636a76f673186Bill Wendling I = FilterIds.begin(), E = FilterIds.end(); I != E; ++I) { 297eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling FilterOffsets.push_back(Offset); 298eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Offset -= TargetAsmInfo::getULEB128Size(*I); 299eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling } 300eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 301eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling FirstActions.reserve(LandingPads.size()); 302eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 303eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling int FirstAction = 0; 304eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling unsigned SizeActions = 0; 3055e953ddfa3abdd684c8a43f9c9c144f584ec7d6fBill Wendling const LandingPadInfo *PrevLPI = 0; 306409914b773ffd53d53d214394d5636a76f673186Bill Wendling 3075cff487665097d971067cbede1598e249f673182Bill Wendling for (SmallVectorImpl<const LandingPadInfo *>::const_iterator 3085e953ddfa3abdd684c8a43f9c9c144f584ec7d6fBill Wendling I = LandingPads.begin(), E = LandingPads.end(); I != E; ++I) { 3095e953ddfa3abdd684c8a43f9c9c144f584ec7d6fBill Wendling const LandingPadInfo *LPI = *I; 3105e953ddfa3abdd684c8a43f9c9c144f584ec7d6fBill Wendling const std::vector<int> &TypeIds = LPI->TypeIds; 3115e953ddfa3abdd684c8a43f9c9c144f584ec7d6fBill Wendling const unsigned NumShared = PrevLPI ? SharedTypeIds(LPI, PrevLPI) : 0; 312eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling unsigned SizeSiteActions = 0; 313eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 314eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling if (NumShared < TypeIds.size()) { 315eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling unsigned SizeAction = 0; 316eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling ActionEntry *PrevAction = 0; 317eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 318eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling if (NumShared) { 3195e953ddfa3abdd684c8a43f9c9c144f584ec7d6fBill Wendling const unsigned SizePrevIds = PrevLPI->TypeIds.size(); 320eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling assert(Actions.size()); 321eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling PrevAction = &Actions.back(); 322eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling SizeAction = TargetAsmInfo::getSLEB128Size(PrevAction->NextAction) + 323eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling TargetAsmInfo::getSLEB128Size(PrevAction->ValueForTypeID); 324eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 325eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling for (unsigned j = NumShared; j != SizePrevIds; ++j) { 326eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling SizeAction -= 327eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling TargetAsmInfo::getSLEB128Size(PrevAction->ValueForTypeID); 328eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling SizeAction += -PrevAction->NextAction; 329eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling PrevAction = PrevAction->Previous; 330eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling } 331eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling } 332eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 333eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // Compute the actions. 3345e953ddfa3abdd684c8a43f9c9c144f584ec7d6fBill Wendling for (unsigned J = NumShared, M = TypeIds.size(); J != M; ++J) { 3355e953ddfa3abdd684c8a43f9c9c144f584ec7d6fBill Wendling int TypeID = TypeIds[J]; 3365e953ddfa3abdd684c8a43f9c9c144f584ec7d6fBill Wendling assert(-1 - TypeID < (int)FilterOffsets.size() && "Unknown filter id!"); 337eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling int ValueForTypeID = TypeID < 0 ? FilterOffsets[-1 - TypeID] : TypeID; 338eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling unsigned SizeTypeID = TargetAsmInfo::getSLEB128Size(ValueForTypeID); 339eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 340eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling int NextAction = SizeAction ? -(SizeAction + SizeTypeID) : 0; 341eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling SizeAction = SizeTypeID + TargetAsmInfo::getSLEB128Size(NextAction); 342eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling SizeSiteActions += SizeAction; 343eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 344eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling ActionEntry Action = {ValueForTypeID, NextAction, PrevAction}; 345eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Actions.push_back(Action); 346eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling PrevAction = &Actions.back(); 347eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling } 348eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 349eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // Record the first action of the landing pad site. 350eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling FirstAction = SizeActions + SizeSiteActions - SizeAction + 1; 351eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling } // else identical - re-use previous FirstAction 352eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 353eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling FirstActions.push_back(FirstAction); 354eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 355eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // Compute this sites contribution to size. 356eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling SizeActions += SizeSiteActions; 3575e953ddfa3abdd684c8a43f9c9c144f584ec7d6fBill Wendling 3585e953ddfa3abdd684c8a43f9c9c144f584ec7d6fBill Wendling PrevLPI = LPI; 359eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling } 360eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 3615e953ddfa3abdd684c8a43f9c9c144f584ec7d6fBill Wendling return SizeActions; 3625e953ddfa3abdd684c8a43f9c9c144f584ec7d6fBill Wendling} 3635e953ddfa3abdd684c8a43f9c9c144f584ec7d6fBill Wendling 364ade025c65c12503aba161a4fa399fd97414abaffBill Wendling/// ComputeCallSiteTable - Compute the call-site table. The entry for an invoke 365ade025c65c12503aba161a4fa399fd97414abaffBill Wendling/// has a try-range containing the call, a non-zero landing pad and an 366ade025c65c12503aba161a4fa399fd97414abaffBill Wendling/// appropriate action. The entry for an ordinary call has a try-range 367ade025c65c12503aba161a4fa399fd97414abaffBill Wendling/// containing the call and zero for the landing pad and the action. Calls 368ade025c65c12503aba161a4fa399fd97414abaffBill Wendling/// marked 'nounwind' have no entry and must not be contained in the try-range 369ade025c65c12503aba161a4fa399fd97414abaffBill Wendling/// of any entry - they form gaps in the table. Entries must be ordered by 370ade025c65c12503aba161a4fa399fd97414abaffBill Wendling/// try-range address. 371ade025c65c12503aba161a4fa399fd97414abaffBill Wendlingvoid DwarfException:: 372ade025c65c12503aba161a4fa399fd97414abaffBill WendlingComputeCallSiteTable(SmallVectorImpl<CallSiteEntry> &CallSites, 373ade025c65c12503aba161a4fa399fd97414abaffBill Wendling const RangeMapType &PadMap, 374ade025c65c12503aba161a4fa399fd97414abaffBill Wendling const SmallVectorImpl<const LandingPadInfo *> &LandingPads, 375ade025c65c12503aba161a4fa399fd97414abaffBill Wendling const SmallVectorImpl<unsigned> &FirstActions) { 376eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // The end label of the previous invoke or nounwind try-range. 377eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling unsigned LastLabel = 0; 378eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 379eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // Whether there is a potentially throwing instruction (currently this means 380eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // an ordinary call) between the end of the previous try-range and now. 381eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling bool SawPotentiallyThrowing = false; 382eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 3835cff487665097d971067cbede1598e249f673182Bill Wendling // Whether the last CallSite entry was for an invoke. 384eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling bool PreviousIsInvoke = false; 385eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 386eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // Visit all instructions in order of address. 387eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling for (MachineFunction::const_iterator I = MF->begin(), E = MF->end(); 388eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling I != E; ++I) { 389eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling for (MachineBasicBlock::const_iterator MI = I->begin(), E = I->end(); 390eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling MI != E; ++MI) { 391eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling if (!MI->isLabel()) { 392eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling SawPotentiallyThrowing |= MI->getDesc().isCall(); 393eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling continue; 394eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling } 395eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 396eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling unsigned BeginLabel = MI->getOperand(0).getImm(); 397eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling assert(BeginLabel && "Invalid label!"); 398eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 399eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // End of the previous try-range? 400eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling if (BeginLabel == LastLabel) 401eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling SawPotentiallyThrowing = false; 402eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 403eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // Beginning of a new try-range? 404eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling RangeMapType::iterator L = PadMap.find(BeginLabel); 405eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling if (L == PadMap.end()) 406eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // Nope, it was just some random label. 407eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling continue; 408eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 409eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling PadRange P = L->second; 410eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling const LandingPadInfo *LandingPad = LandingPads[P.PadIndex]; 411eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling assert(BeginLabel == LandingPad->BeginLabels[P.RangeIndex] && 412eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling "Inconsistent landing pad map!"); 413eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 4141b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach // For Dwarf exception handling (SjLj handling doesn't use this) 415eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // If some instruction between the previous try-range and this one may 416eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // throw, create a call-site entry with no landing pad for the region 417eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // between the try-ranges. 4181b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach if (SawPotentiallyThrowing && 4191b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach TAI->getExceptionHandlingType() == ExceptionHandling::Dwarf) { 420eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling CallSiteEntry Site = {LastLabel, BeginLabel, 0, 0}; 421eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling CallSites.push_back(Site); 422eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling PreviousIsInvoke = false; 423eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling } 424eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 425eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling LastLabel = LandingPad->EndLabels[P.RangeIndex]; 426eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling assert(BeginLabel && LastLabel && "Invalid landing pad!"); 427eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 428eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling if (LandingPad->LandingPadLabel) { 429eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // This try-range is for an invoke. 430eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling CallSiteEntry Site = {BeginLabel, LastLabel, 431eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling LandingPad->LandingPadLabel, 432eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling FirstActions[P.PadIndex]}; 433eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 434eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // Try to merge with the previous call-site. 435eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling if (PreviousIsInvoke) { 436eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling CallSiteEntry &Prev = CallSites.back(); 437eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling if (Site.PadLabel == Prev.PadLabel && Site.Action == Prev.Action) { 438eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // Extend the range of the previous entry. 439eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Prev.EndLabel = Site.EndLabel; 440eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling continue; 441eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling } 442eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling } 443eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 444eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // Otherwise, create a new call-site. 445eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling CallSites.push_back(Site); 446eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling PreviousIsInvoke = true; 447eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling } else { 448eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // Create a gap. 449eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling PreviousIsInvoke = false; 450eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling } 451eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling } 452eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling } 453eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 454eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // If some instruction between the previous try-range and the end of the 455eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // function may throw, create a call-site entry with no landing pad for the 456eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // region following the try-range. 4571b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach if (SawPotentiallyThrowing && 4581b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach TAI->getExceptionHandlingType() == ExceptionHandling::Dwarf) { 459eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling CallSiteEntry Site = {LastLabel, 0, 0, 0}; 460eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling CallSites.push_back(Site); 461eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling } 462ade025c65c12503aba161a4fa399fd97414abaffBill Wendling} 463ade025c65c12503aba161a4fa399fd97414abaffBill Wendling 4640dafca90761097230f02e655fdd541f59b888315Bill Wendling/// EmitExceptionTable - Emit landing pads and actions. 4650dafca90761097230f02e655fdd541f59b888315Bill Wendling/// 4660dafca90761097230f02e655fdd541f59b888315Bill Wendling/// The general organization of the table is complex, but the basic concepts are 4670dafca90761097230f02e655fdd541f59b888315Bill Wendling/// easy. First there is a header which describes the location and organization 4680dafca90761097230f02e655fdd541f59b888315Bill Wendling/// of the three components that follow. 4690dafca90761097230f02e655fdd541f59b888315Bill Wendling/// 4700dafca90761097230f02e655fdd541f59b888315Bill Wendling/// 1. The landing pad site information describes the range of code covered by 4710dafca90761097230f02e655fdd541f59b888315Bill Wendling/// the try. In our case it's an accumulation of the ranges covered by the 4720dafca90761097230f02e655fdd541f59b888315Bill Wendling/// invokes in the try. There is also a reference to the landing pad that 4730dafca90761097230f02e655fdd541f59b888315Bill Wendling/// handles the exception once processed. Finally an index into the actions 4740dafca90761097230f02e655fdd541f59b888315Bill Wendling/// table. 4750dafca90761097230f02e655fdd541f59b888315Bill Wendling/// 2. The action table, in our case, is composed of pairs of type ids and next 4760dafca90761097230f02e655fdd541f59b888315Bill Wendling/// action offset. Starting with the action index from the landing pad 4770dafca90761097230f02e655fdd541f59b888315Bill Wendling/// site, each type Id is checked for a match to the current exception. If 4780dafca90761097230f02e655fdd541f59b888315Bill Wendling/// it matches then the exception and type id are passed on to the landing 4790dafca90761097230f02e655fdd541f59b888315Bill Wendling/// pad. Otherwise the next action is looked up. This chain is terminated 4800dafca90761097230f02e655fdd541f59b888315Bill Wendling/// with a next action of zero. If no type id is found the the frame is 4810dafca90761097230f02e655fdd541f59b888315Bill Wendling/// unwound and handling continues. 4820dafca90761097230f02e655fdd541f59b888315Bill Wendling/// 3. Type id table contains references to all the C++ typeinfo for all 4830dafca90761097230f02e655fdd541f59b888315Bill Wendling/// catches in the function. This tables is reversed indexed base 1. 484ade025c65c12503aba161a4fa399fd97414abaffBill Wendlingvoid DwarfException::EmitExceptionTable() { 485ade025c65c12503aba161a4fa399fd97414abaffBill Wendling const std::vector<GlobalVariable *> &TypeInfos = MMI->getTypeInfos(); 486ade025c65c12503aba161a4fa399fd97414abaffBill Wendling const std::vector<unsigned> &FilterIds = MMI->getFilterIds(); 487ade025c65c12503aba161a4fa399fd97414abaffBill Wendling const std::vector<LandingPadInfo> &PadInfos = MMI->getLandingPads(); 488ade025c65c12503aba161a4fa399fd97414abaffBill Wendling if (PadInfos.empty()) return; 489ade025c65c12503aba161a4fa399fd97414abaffBill Wendling 490ade025c65c12503aba161a4fa399fd97414abaffBill Wendling // Sort the landing pads in order of their type ids. This is used to fold 491ade025c65c12503aba161a4fa399fd97414abaffBill Wendling // duplicate actions. 492ade025c65c12503aba161a4fa399fd97414abaffBill Wendling SmallVector<const LandingPadInfo *, 64> LandingPads; 493ade025c65c12503aba161a4fa399fd97414abaffBill Wendling LandingPads.reserve(PadInfos.size()); 494ade025c65c12503aba161a4fa399fd97414abaffBill Wendling 495ade025c65c12503aba161a4fa399fd97414abaffBill Wendling for (unsigned i = 0, N = PadInfos.size(); i != N; ++i) 496ade025c65c12503aba161a4fa399fd97414abaffBill Wendling LandingPads.push_back(&PadInfos[i]); 497ade025c65c12503aba161a4fa399fd97414abaffBill Wendling 498ade025c65c12503aba161a4fa399fd97414abaffBill Wendling std::sort(LandingPads.begin(), LandingPads.end(), PadLT); 499ade025c65c12503aba161a4fa399fd97414abaffBill Wendling 500ade025c65c12503aba161a4fa399fd97414abaffBill Wendling // Compute the actions table and gather the first action index for each 501ade025c65c12503aba161a4fa399fd97414abaffBill Wendling // landing pad site. 502ade025c65c12503aba161a4fa399fd97414abaffBill Wendling SmallVector<ActionEntry, 32> Actions; 503ade025c65c12503aba161a4fa399fd97414abaffBill Wendling SmallVector<unsigned, 64> FirstActions; 504ade025c65c12503aba161a4fa399fd97414abaffBill Wendling unsigned SizeActions = ComputeActionsTable(LandingPads, Actions, FirstActions); 505ade025c65c12503aba161a4fa399fd97414abaffBill Wendling 506ade025c65c12503aba161a4fa399fd97414abaffBill Wendling // Invokes and nounwind calls have entries in PadMap (due to being bracketed 507ade025c65c12503aba161a4fa399fd97414abaffBill Wendling // by try-range labels when lowered). Ordinary calls do not, so appropriate 5081b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach // try-ranges for them need be deduced when using Dwarf exception handling. 509ade025c65c12503aba161a4fa399fd97414abaffBill Wendling RangeMapType PadMap; 510ade025c65c12503aba161a4fa399fd97414abaffBill Wendling for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) { 511ade025c65c12503aba161a4fa399fd97414abaffBill Wendling const LandingPadInfo *LandingPad = LandingPads[i]; 512ade025c65c12503aba161a4fa399fd97414abaffBill Wendling for (unsigned j = 0, E = LandingPad->BeginLabels.size(); j != E; ++j) { 513ade025c65c12503aba161a4fa399fd97414abaffBill Wendling unsigned BeginLabel = LandingPad->BeginLabels[j]; 514ade025c65c12503aba161a4fa399fd97414abaffBill Wendling assert(!PadMap.count(BeginLabel) && "Duplicate landing pad labels!"); 515ade025c65c12503aba161a4fa399fd97414abaffBill Wendling PadRange P = { i, j }; 516ade025c65c12503aba161a4fa399fd97414abaffBill Wendling PadMap[BeginLabel] = P; 517ade025c65c12503aba161a4fa399fd97414abaffBill Wendling } 518ade025c65c12503aba161a4fa399fd97414abaffBill Wendling } 519ade025c65c12503aba161a4fa399fd97414abaffBill Wendling 520ade025c65c12503aba161a4fa399fd97414abaffBill Wendling // Compute the call-site table. 521ade025c65c12503aba161a4fa399fd97414abaffBill Wendling SmallVector<CallSiteEntry, 64> CallSites; 5228b818d7e98309125c6058c4ea72a7dc73b031db2Jim Grosbach ComputeCallSiteTable(CallSites, PadMap, LandingPads, FirstActions); 523eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 524eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // Final tallies. 525eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 526eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // Call sites. 527eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling const unsigned SiteStartSize = sizeof(int32_t); // DW_EH_PE_udata4 528eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling const unsigned SiteLengthSize = sizeof(int32_t); // DW_EH_PE_udata4 529eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling const unsigned LandingPadSize = sizeof(int32_t); // DW_EH_PE_udata4 5301b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach unsigned SizeSites; 531bff392384ddb032c732c38ec78b91d7a25dcf467Jim Grosbach 532bff392384ddb032c732c38ec78b91d7a25dcf467Jim Grosbach bool HaveTTData = (TAI->getExceptionHandlingType() == ExceptionHandling::SjLj) 533bff392384ddb032c732c38ec78b91d7a25dcf467Jim Grosbach ? (!TypeInfos.empty() || !FilterIds.empty()) : true; 534bff392384ddb032c732c38ec78b91d7a25dcf467Jim Grosbach 535bff392384ddb032c732c38ec78b91d7a25dcf467Jim Grosbach 5361b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach if (TAI->getExceptionHandlingType() == ExceptionHandling::SjLj) { 5378b818d7e98309125c6058c4ea72a7dc73b031db2Jim Grosbach SizeSites = 0; 5381b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach } else 5391b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach SizeSites = CallSites.size() * 5401b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach (SiteStartSize + SiteLengthSize + LandingPadSize); 5411b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach for (unsigned i = 0, e = CallSites.size(); i < e; ++i) { 542eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling SizeSites += TargetAsmInfo::getULEB128Size(CallSites[i].Action); 5431b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach if (TAI->getExceptionHandlingType() == ExceptionHandling::SjLj) 5441b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach SizeSites += TargetAsmInfo::getULEB128Size(i); 5451b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach } 546eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // Type infos. 547eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling const unsigned TypeInfoSize = TD->getPointerSize(); // DW_EH_PE_absptr 548eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling unsigned SizeTypes = TypeInfos.size() * TypeInfoSize; 549eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 550eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling unsigned TypeOffset = sizeof(int8_t) + // Call site format 551eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling TargetAsmInfo::getULEB128Size(SizeSites) + // Call-site table length 552eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling SizeSites + SizeActions + SizeTypes; 553eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 554eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling unsigned TotalSize = sizeof(int8_t) + // LPStart format 555eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling sizeof(int8_t) + // TType format 556bff392384ddb032c732c38ec78b91d7a25dcf467Jim Grosbach (HaveTTData ? 557bff392384ddb032c732c38ec78b91d7a25dcf467Jim Grosbach TargetAsmInfo::getULEB128Size(TypeOffset) : 0) + // TType base offset 558eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling TypeOffset; 559eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 560eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling unsigned SizeAlign = (4 - TotalSize) & 3; 561eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 562eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // Begin the exception table. 563d5bbb07ec806e6fa1e804afd7073987fdacc83e4Chris Lattner const MCSection *LSDASection = Asm->getObjFileLowering().getLSDASection(); 564d5bbb07ec806e6fa1e804afd7073987fdacc83e4Chris Lattner Asm->SwitchToSection(LSDASection); 565eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EmitAlignment(2, 0, 0, false); 566eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling O << "GCC_except_table" << SubprogramCount << ":\n"; 567eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 568eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling for (unsigned i = 0; i != SizeAlign; ++i) { 569eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EmitInt8(0); 570eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EOL("Padding"); 571c5800a809fd5e411de78ac1a4be633cd3e1d7840Bill Wendling } 572eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 573eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling EmitLabel("exception", SubprogramCount); 5741b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach if (TAI->getExceptionHandlingType() == ExceptionHandling::SjLj) { 5751b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach std::string SjLjName = "_lsda_"; 5761b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach SjLjName += MF->getFunction()->getName().str(); 5771b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach EmitLabel(SjLjName.c_str(), 0); 5781b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach } 579eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 580eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // Emit the header. 581eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EmitInt8(dwarf::DW_EH_PE_omit); 582eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EOL("LPStart format (DW_EH_PE_omit)"); 583b0d9c3e7fdc952ae7cbe169b01ccaf1b80329403Bill Wendling 584ade025c65c12503aba161a4fa399fd97414abaffBill Wendling#if 0 58581c9a069377e9474d010f04eebe8325fd11429e3Chris Lattner if (TypeInfos.empty() && FilterIds.empty()) { 586ad88bc4076d088baad8a5ee9561e46ac08a1c88aChris Lattner // If there are no typeinfos or filters, there is nothing to emit, optimize 587ad88bc4076d088baad8a5ee9561e46ac08a1c88aChris Lattner // by specifying the "omit" encoding. 58881c9a069377e9474d010f04eebe8325fd11429e3Chris Lattner Asm->EmitInt8(dwarf::DW_EH_PE_omit); 58981c9a069377e9474d010f04eebe8325fd11429e3Chris Lattner Asm->EOL("TType format (DW_EH_PE_omit)"); 59081c9a069377e9474d010f04eebe8325fd11429e3Chris Lattner } else { 591ad88bc4076d088baad8a5ee9561e46ac08a1c88aChris Lattner // Okay, we have actual filters or typeinfos to emit. As such, we need to 592ad88bc4076d088baad8a5ee9561e46ac08a1c88aChris Lattner // pick a type encoding for them. We're about to emit a list of pointers to 593ad88bc4076d088baad8a5ee9561e46ac08a1c88aChris Lattner // typeinfo objects at the end of the LSDA. However, unless we're in static 594ad88bc4076d088baad8a5ee9561e46ac08a1c88aChris Lattner // mode, this reference will require a relocation by the dynamic linker. 59546b754c76bd6a720dd1dd3be248cb93a4e25d3e5Chris Lattner // 596ad88bc4076d088baad8a5ee9561e46ac08a1c88aChris Lattner // Because of this, we have a couple of options: 597ad88bc4076d088baad8a5ee9561e46ac08a1c88aChris Lattner // 1) If we are in -static mode, we can always use an absolute reference 598ad88bc4076d088baad8a5ee9561e46ac08a1c88aChris Lattner // from the LSDA, because the static linker will resolve it. 599ad88bc4076d088baad8a5ee9561e46ac08a1c88aChris Lattner // 2) Otherwise, if the LSDA section is writable, we can output the direct 600ad88bc4076d088baad8a5ee9561e46ac08a1c88aChris Lattner // reference to the typeinfo and allow the dynamic linker to relocate 601ad88bc4076d088baad8a5ee9561e46ac08a1c88aChris Lattner // it. Since it is in a writable section, the dynamic linker won't 602ad88bc4076d088baad8a5ee9561e46ac08a1c88aChris Lattner // have a problem. 603ad88bc4076d088baad8a5ee9561e46ac08a1c88aChris Lattner // 3) Finally, if we're in PIC mode and the LDSA section isn't writable, 604ad88bc4076d088baad8a5ee9561e46ac08a1c88aChris Lattner // we need to use some form of indirection. For example, on Darwin, 605ad88bc4076d088baad8a5ee9561e46ac08a1c88aChris Lattner // we can output a statically-relocatable reference to a dyld stub. The 606ad88bc4076d088baad8a5ee9561e46ac08a1c88aChris Lattner // offset to the stub is constant, but the contents are in a section 607ad88bc4076d088baad8a5ee9561e46ac08a1c88aChris Lattner // that is updated by the dynamic linker. This is easy enough, but we 608ad88bc4076d088baad8a5ee9561e46ac08a1c88aChris Lattner // need to tell the personality function of the unwinder to indirect 609ad88bc4076d088baad8a5ee9561e46ac08a1c88aChris Lattner // through the dyld stub. 610ad88bc4076d088baad8a5ee9561e46ac08a1c88aChris Lattner // 611ad88bc4076d088baad8a5ee9561e46ac08a1c88aChris Lattner // FIXME: When this is actually implemented, we'll have to emit the stubs 612ad88bc4076d088baad8a5ee9561e46ac08a1c88aChris Lattner // somewhere. This predicate should be moved to a shared location that is 613ad88bc4076d088baad8a5ee9561e46ac08a1c88aChris Lattner // in target-independent code. 614ad88bc4076d088baad8a5ee9561e46ac08a1c88aChris Lattner // 615ad88bc4076d088baad8a5ee9561e46ac08a1c88aChris Lattner if (LSDASection->isWritable() || 616ad88bc4076d088baad8a5ee9561e46ac08a1c88aChris Lattner Asm->TM.getRelocationModel() == Reloc::Static) { 617ad88bc4076d088baad8a5ee9561e46ac08a1c88aChris Lattner Asm->EmitInt8(DW_EH_PE_absptr); 618ad88bc4076d088baad8a5ee9561e46ac08a1c88aChris Lattner Asm->EOL("TType format (DW_EH_PE_absptr)"); 619ad88bc4076d088baad8a5ee9561e46ac08a1c88aChris Lattner } else { 620ad88bc4076d088baad8a5ee9561e46ac08a1c88aChris Lattner Asm->EmitInt8(DW_EH_PE_pcrel | DW_EH_PE_indirect | DW_EH_PE_sdata4); 621ad88bc4076d088baad8a5ee9561e46ac08a1c88aChris Lattner Asm->EOL("TType format (DW_EH_PE_pcrel | DW_EH_PE_indirect" 622ad88bc4076d088baad8a5ee9561e46ac08a1c88aChris Lattner " | DW_EH_PE_sdata4)"); 623ad88bc4076d088baad8a5ee9561e46ac08a1c88aChris Lattner } 624b0d9c3e7fdc952ae7cbe169b01ccaf1b80329403Bill Wendling Asm->EmitULEB128Bytes(TypeOffset); 625b0d9c3e7fdc952ae7cbe169b01ccaf1b80329403Bill Wendling Asm->EOL("TType base offset"); 626b0d9c3e7fdc952ae7cbe169b01ccaf1b80329403Bill Wendling } 627ade025c65c12503aba161a4fa399fd97414abaffBill Wendling#else 628bff392384ddb032c732c38ec78b91d7a25dcf467Jim Grosbach // For SjLj exceptions, if there is no TypeInfo, then we just explicitly 6291b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach // say that we're omitting that bit. 6301b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach // FIXME: does this apply to Dwarf also? The above #if 0 implies yes? 631bff392384ddb032c732c38ec78b91d7a25dcf467Jim Grosbach if (!HaveTTData) { 6321b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach Asm->EmitInt8(dwarf::DW_EH_PE_omit); 6331b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach Asm->EOL("TType format (DW_EH_PE_omit)"); 6341b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach } else { 6351b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach Asm->EmitInt8(dwarf::DW_EH_PE_absptr); 6361b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach Asm->EOL("TType format (DW_EH_PE_absptr)"); 6371b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach Asm->EmitULEB128Bytes(TypeOffset); 6381b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach Asm->EOL("TType base offset"); 6391b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach } 640ade025c65c12503aba161a4fa399fd97414abaffBill Wendling#endif 641b0d9c3e7fdc952ae7cbe169b01ccaf1b80329403Bill Wendling 6421b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach // SjLj Exception handilng 6431b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach if (TAI->getExceptionHandlingType() == ExceptionHandling::SjLj) { 6441b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach Asm->EmitInt8(dwarf::DW_EH_PE_udata4); 6451b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach Asm->EOL("Call site format (DW_EH_PE_udata4)"); 6461b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach Asm->EmitULEB128Bytes(SizeSites); 6471b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach Asm->EOL("Call-site table length"); 6481b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach 6491b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach // Emit the landing pad site information. 6508b818d7e98309125c6058c4ea72a7dc73b031db2Jim Grosbach unsigned idx = 0; 6518b818d7e98309125c6058c4ea72a7dc73b031db2Jim Grosbach for (SmallVectorImpl<CallSiteEntry>::const_iterator 6528b818d7e98309125c6058c4ea72a7dc73b031db2Jim Grosbach I = CallSites.begin(), E = CallSites.end(); I != E; ++I, ++idx) { 6538b818d7e98309125c6058c4ea72a7dc73b031db2Jim Grosbach const CallSiteEntry &S = *I; 6548b818d7e98309125c6058c4ea72a7dc73b031db2Jim Grosbach Asm->EmitULEB128Bytes(idx); 6551b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach Asm->EOL("Landing pad"); 6561b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach Asm->EmitULEB128Bytes(S.Action); 6571b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach Asm->EOL("Action"); 6581b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach } 6591b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach } else { 6601b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach // DWARF Exception handling 6611b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach assert(TAI->getExceptionHandlingType() == ExceptionHandling::Dwarf); 6621b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach 6631b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach Asm->EmitInt8(dwarf::DW_EH_PE_udata4); 6641b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach Asm->EOL("Call site format (DW_EH_PE_udata4)"); 6651b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach Asm->EmitULEB128Bytes(SizeSites); 6661b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach Asm->EOL("Call-site table length"); 667eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 6681b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach // Emit the landing pad site information. 6691b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach for (SmallVectorImpl<CallSiteEntry>::const_iterator 6705cff487665097d971067cbede1598e249f673182Bill Wendling I = CallSites.begin(), E = CallSites.end(); I != E; ++I) { 6711b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach const CallSiteEntry &S = *I; 6721b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach const char *BeginTag; 6731b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach unsigned BeginNumber; 674eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 6751b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach if (!S.BeginLabel) { 6761b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach BeginTag = "eh_func_begin"; 6771b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach BeginNumber = SubprogramCount; 6781b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach } else { 6791b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach BeginTag = "label"; 6801b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach BeginNumber = S.BeginLabel; 6811b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach } 682eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 6831b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach EmitSectionOffset(BeginTag, "eh_func_begin", BeginNumber, SubprogramCount, 6841b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach true, true); 6851b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach Asm->EOL("Region start"); 686eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 6871b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach if (!S.EndLabel) 6881b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach EmitDifference("eh_func_end", SubprogramCount, BeginTag, BeginNumber, 6891b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach true); 6901b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach else 6911b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach EmitDifference("label", S.EndLabel, BeginTag, BeginNumber, true); 692eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 6931b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach Asm->EOL("Region length"); 694eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 6951b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach if (!S.PadLabel) 6961b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach Asm->EmitInt32(0); 6971b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach else 6981b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach EmitSectionOffset("label", "eh_func_begin", S.PadLabel, SubprogramCount, 6991b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach true, true); 700eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 7011b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach Asm->EOL("Landing pad"); 702eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 7031b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach Asm->EmitULEB128Bytes(S.Action); 7041b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach Asm->EOL("Action"); 7051b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach } 706eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling } 707eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 708eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // Emit the actions. 7095cff487665097d971067cbede1598e249f673182Bill Wendling for (SmallVectorImpl<ActionEntry>::const_iterator 7105cff487665097d971067cbede1598e249f673182Bill Wendling I = Actions.begin(), E = Actions.end(); I != E; ++I) { 7115cff487665097d971067cbede1598e249f673182Bill Wendling const ActionEntry &Action = *I; 712eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EmitSLEB128Bytes(Action.ValueForTypeID); 713eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EOL("TypeInfo index"); 714eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EmitSLEB128Bytes(Action.NextAction); 715eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EOL("Next action"); 716eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling } 717eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 718eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // Emit the type ids. 7195cff487665097d971067cbede1598e249f673182Bill Wendling for (std::vector<GlobalVariable *>::const_reverse_iterator 7205cff487665097d971067cbede1598e249f673182Bill Wendling I = TypeInfos.rbegin(), E = TypeInfos.rend(); I != E; ++I) { 7215cff487665097d971067cbede1598e249f673182Bill Wendling GlobalVariable *GV = *I; 722eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling PrintRelDirective(); 723eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 724eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling if (GV) { 725eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling std::string GLN; 726eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling O << Asm->getGlobalLinkName(GV, GLN); 727eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling } else { 728eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling O << "0"; 729eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling } 730eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 731eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EOL("TypeInfo"); 732eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling } 733eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 734eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // Emit the filter typeids. 7355cff487665097d971067cbede1598e249f673182Bill Wendling for (std::vector<unsigned>::const_iterator 7365cff487665097d971067cbede1598e249f673182Bill Wendling I = FilterIds.begin(), E = FilterIds.end(); I < E; ++I) { 7375cff487665097d971067cbede1598e249f673182Bill Wendling unsigned TypeID = *I; 738eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EmitULEB128Bytes(TypeID); 739eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EOL("Filter TypeInfo index"); 740eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling } 741eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 742eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling Asm->EmitAlignment(2, 0, 0, false); 743eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling} 744eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 745eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling/// EndModule - Emit all exception information that should come after the 746eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling/// content. 747eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendlingvoid DwarfException::EndModule() { 7481b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach if (TAI->getExceptionHandlingType() != ExceptionHandling::Dwarf) 7491b747ad8a0694b86e8d98a8b9a05ddfe74ec0cd3Jim Grosbach return; 750eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling if (TimePassesIsEnabled) 751eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling ExceptionTimer->startTimer(); 752eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 753eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling if (shouldEmitMovesModule || shouldEmitTableModule) { 754eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling const std::vector<Function *> Personalities = MMI->getPersonalities(); 755eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling for (unsigned i = 0; i < Personalities.size(); ++i) 756eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling EmitCommonEHFrame(Personalities[i], i); 757eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 758eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling for (std::vector<FunctionEHFrameInfo>::iterator I = EHFrames.begin(), 759eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling E = EHFrames.end(); I != E; ++I) 760eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling EmitEHFrame(*I); 761eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling } 762eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 763eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling if (TimePassesIsEnabled) 764eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling ExceptionTimer->stopTimer(); 765eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling} 766eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 767eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling/// BeginFunction - Gather pre-function exception information. Assumes being 768eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling/// emitted immediately after the function entry point. 769eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendlingvoid DwarfException::BeginFunction(MachineFunction *MF) { 770eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling if (TimePassesIsEnabled) 771eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling ExceptionTimer->startTimer(); 772eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 773eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling this->MF = MF; 774eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling shouldEmitTable = shouldEmitMoves = false; 775eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 776eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling if (MMI && TAI->doesSupportExceptionHandling()) { 777eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // Map all labels and get rid of any dead landing pads. 778eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling MMI->TidyLandingPads(); 779eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 780eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // If any landing pads survive, we need an EH table. 781eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling if (MMI->getLandingPads().size()) 782eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling shouldEmitTable = true; 783eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 784eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // See if we need frame move info. 785eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling if (!MF->getFunction()->doesNotThrow() || UnwindTablesMandatory) 786eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling shouldEmitMoves = true; 787eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 788eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling if (shouldEmitMoves || shouldEmitTable) 789eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // Assumes in correct section after the entry point. 790eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling EmitLabel("eh_func_begin", ++SubprogramCount); 791eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling } 792eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 793eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling shouldEmitTableModule |= shouldEmitTable; 794eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling shouldEmitMovesModule |= shouldEmitMoves; 795eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 796eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling if (TimePassesIsEnabled) 797eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling ExceptionTimer->stopTimer(); 798eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling} 799eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 800eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling/// EndFunction - Gather and emit post-function exception information. 801eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling/// 802eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendlingvoid DwarfException::EndFunction() { 803eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling if (TimePassesIsEnabled) 804eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling ExceptionTimer->startTimer(); 805eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 806eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling if (shouldEmitMoves || shouldEmitTable) { 807eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling EmitLabel("eh_func_end", SubprogramCount); 808eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling EmitExceptionTable(); 809eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 810eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling // Save EH frame information 811eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling EHFrames.push_back( 812e2cf37b88c089a71727b3ecd466856f0cd638813Chris Lattner FunctionEHFrameInfo(getAsm()->getCurrentFunctionEHName(MF), 813eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling SubprogramCount, 814eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling MMI->getPersonalityIndex(), 815eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling MF->getFrameInfo()->hasCalls(), 816eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling !MMI->getLandingPads().empty(), 817eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling MMI->getFrameMoves(), 818eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling MF->getFunction())); 819eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling } 820eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling 821eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling if (TimePassesIsEnabled) 822eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling ExceptionTimer->stopTimer(); 823eb9072195ca7d777a71194dcaaaa369d82f24f53Bill Wendling} 824