Remove exception handling support from the old JIT.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@181354 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/ExecutionEngine/JIT/CMakeLists.txt b/lib/ExecutionEngine/JIT/CMakeLists.txt
index 52bb389..e16baed 100644
--- a/lib/ExecutionEngine/JIT/CMakeLists.txt
+++ b/lib/ExecutionEngine/JIT/CMakeLists.txt
@@ -3,7 +3,6 @@
add_llvm_library(LLVMJIT
JIT.cpp
- JITDwarfEmitter.cpp
JITEmitter.cpp
JITMemoryManager.cpp
)
diff --git a/lib/ExecutionEngine/JIT/JITDwarfEmitter.cpp b/lib/ExecutionEngine/JIT/JITDwarfEmitter.cpp
deleted file mode 100644
index 35d2b8b..0000000
--- a/lib/ExecutionEngine/JIT/JITDwarfEmitter.cpp
+++ /dev/null
@@ -1,596 +0,0 @@
-//===----- JITDwarfEmitter.cpp - Write dwarf tables into memory -----------===//
-//
-// The LLVM Compiler Infrastructure
-//
-// This file is distributed under the University of Illinois Open Source
-// License. See LICENSE.TXT for details.
-//
-//===----------------------------------------------------------------------===//
-//
-// This file defines a JITDwarfEmitter object that is used by the JIT to
-// write dwarf tables to memory.
-//
-//===----------------------------------------------------------------------===//
-
-#include "JITDwarfEmitter.h"
-#include "JIT.h"
-#include "llvm/ADT/DenseMap.h"
-#include "llvm/CodeGen/JITCodeEmitter.h"
-#include "llvm/CodeGen/MachineFunction.h"
-#include "llvm/CodeGen/MachineModuleInfo.h"
-#include "llvm/ExecutionEngine/JITMemoryManager.h"
-#include "llvm/IR/DataLayout.h"
-#include "llvm/IR/Function.h"
-#include "llvm/MC/MCAsmInfo.h"
-#include "llvm/MC/MCSymbol.h"
-#include "llvm/MC/MachineLocation.h"
-#include "llvm/Support/ErrorHandling.h"
-#include "llvm/Target/TargetFrameLowering.h"
-#include "llvm/Target/TargetInstrInfo.h"
-#include "llvm/Target/TargetMachine.h"
-#include "llvm/Target/TargetRegisterInfo.h"
-using namespace llvm;
-
-JITDwarfEmitter::JITDwarfEmitter(JIT& theJit) : MMI(0), Jit(theJit) {}
-
-
-unsigned char* JITDwarfEmitter::EmitDwarfTable(MachineFunction& F,
- JITCodeEmitter& jce,
- unsigned char* StartFunction,
- unsigned char* EndFunction,
- unsigned char* &EHFramePtr) {
- assert(MMI && "MachineModuleInfo not registered!");
-
- const TargetMachine& TM = F.getTarget();
- TD = TM.getDataLayout();
- stackGrowthDirection = TM.getFrameLowering()->getStackGrowthDirection();
- RI = TM.getRegisterInfo();
- MAI = TM.getMCAsmInfo();
- JCE = &jce;
-
- unsigned char* ExceptionTable = EmitExceptionTable(&F, StartFunction,
- EndFunction);
-
- unsigned char* Result = 0;
-
- const std::vector<const Function *> Personalities = MMI->getPersonalities();
- EHFramePtr = EmitCommonEHFrame(Personalities[MMI->getPersonalityIndex()]);
-
- Result = EmitEHFrame(Personalities[MMI->getPersonalityIndex()], EHFramePtr,
- StartFunction, EndFunction, ExceptionTable);
-
- return Result;
-}
-
-
-void
-JITDwarfEmitter::EmitFrameMoves(intptr_t BaseLabelPtr,
- const std::vector<MachineMove> &Moves) const {
- unsigned PointerSize = TD->getPointerSize();
- int stackGrowth = stackGrowthDirection == TargetFrameLowering::StackGrowsUp ?
- PointerSize : -PointerSize;
- MCSymbol *BaseLabel = 0;
-
- for (unsigned i = 0, N = Moves.size(); i < N; ++i) {
- const MachineMove &Move = Moves[i];
- MCSymbol *Label = Move.getLabel();
-
- // Throw out move if the label is invalid.
- if (Label && (*JCE->getLabelLocations())[Label] == 0)
- continue;
-
- intptr_t LabelPtr = 0;
- if (Label) LabelPtr = JCE->getLabelAddress(Label);
-
- const MachineLocation &Dst = Move.getDestination();
- const MachineLocation &Src = Move.getSource();
-
- // Advance row if new location.
- if (BaseLabelPtr && Label && BaseLabel != Label) {
- JCE->emitByte(dwarf::DW_CFA_advance_loc4);
- JCE->emitInt32(LabelPtr - BaseLabelPtr);
-
- BaseLabel = Label;
- BaseLabelPtr = LabelPtr;
- }
-
- // If advancing cfa.
- if (Dst.isReg() && Dst.getReg() == MachineLocation::VirtualFP) {
- if (!Src.isReg()) {
- if (Src.getReg() == MachineLocation::VirtualFP) {
- JCE->emitByte(dwarf::DW_CFA_def_cfa_offset);
- } else {
- JCE->emitByte(dwarf::DW_CFA_def_cfa);
- JCE->emitULEB128Bytes(RI->getDwarfRegNum(Src.getReg(), true));
- }
-
- JCE->emitULEB128Bytes(-Src.getOffset());
- } else {
- llvm_unreachable("Machine move not supported yet.");
- }
- } else if (Src.isReg() &&
- Src.getReg() == MachineLocation::VirtualFP) {
- if (Dst.isReg()) {
- JCE->emitByte(dwarf::DW_CFA_def_cfa_register);
- JCE->emitULEB128Bytes(RI->getDwarfRegNum(Dst.getReg(), true));
- } else {
- llvm_unreachable("Machine move not supported yet.");
- }
- } else {
- unsigned Reg = RI->getDwarfRegNum(Src.getReg(), true);
- int Offset = Dst.getOffset() / stackGrowth;
-
- if (Offset < 0) {
- JCE->emitByte(dwarf::DW_CFA_offset_extended_sf);
- JCE->emitULEB128Bytes(Reg);
- JCE->emitSLEB128Bytes(Offset);
- } else if (Reg < 64) {
- JCE->emitByte(dwarf::DW_CFA_offset + Reg);
- JCE->emitULEB128Bytes(Offset);
- } else {
- JCE->emitByte(dwarf::DW_CFA_offset_extended);
- JCE->emitULEB128Bytes(Reg);
- JCE->emitULEB128Bytes(Offset);
- }
- }
- }
-}
-
-/// SharedTypeIds - How many leading type ids two landing pads have in common.
-static unsigned SharedTypeIds(const LandingPadInfo *L,
- const LandingPadInfo *R) {
- const std::vector<int> &LIds = L->TypeIds, &RIds = R->TypeIds;
- unsigned LSize = LIds.size(), RSize = RIds.size();
- unsigned MinSize = LSize < RSize ? LSize : RSize;
- unsigned Count = 0;
-
- for (; Count != MinSize; ++Count)
- if (LIds[Count] != RIds[Count])
- return Count;
-
- return Count;
-}
-
-
-/// PadLT - Order landing pads lexicographically by type id.
-static bool PadLT(const LandingPadInfo *L, const LandingPadInfo *R) {
- const std::vector<int> &LIds = L->TypeIds, &RIds = R->TypeIds;
- unsigned LSize = LIds.size(), RSize = RIds.size();
- unsigned MinSize = LSize < RSize ? LSize : RSize;
-
- for (unsigned i = 0; i != MinSize; ++i)
- if (LIds[i] != RIds[i])
- return LIds[i] < RIds[i];
-
- return LSize < RSize;
-}
-
-namespace {
-
-/// 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;
-};
-
-/// 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<MCSymbol*, PadRange> RangeMapType;
-
-/// CallSiteEntry - Structure describing an entry in the call-site table.
-struct CallSiteEntry {
- MCSymbol *BeginLabel; // zero indicates the start of the function.
- MCSymbol *EndLabel; // zero indicates the end of the function.
- MCSymbol *PadLabel; // zero indicates that there is no landing pad.
- unsigned Action;
-};
-
-}
-
-unsigned char* JITDwarfEmitter::EmitExceptionTable(MachineFunction* MF,
- unsigned char* StartFunction,
- unsigned char* EndFunction) const {
- assert(MMI && "MachineModuleInfo not registered!");
-
- // Map all labels and get rid of any dead landing pads.
- MMI->TidyLandingPads(JCE->getLabelLocations());
-
- const std::vector<const GlobalVariable *> &TypeInfos = MMI->getTypeInfos();
- const std::vector<unsigned> &FilterIds = MMI->getFilterIds();
- const std::vector<LandingPadInfo> &PadInfos = MMI->getLandingPads();
- if (PadInfos.empty()) return 0;
-
- // Sort the landing pads in order of their type ids. This is used to fold
- // duplicate actions.
- SmallVector<const LandingPadInfo *, 64> LandingPads;
- LandingPads.reserve(PadInfos.size());
- for (unsigned i = 0, N = PadInfos.size(); i != N; ++i)
- LandingPads.push_back(&PadInfos[i]);
- std::sort(LandingPads.begin(), LandingPads.end(), PadLT);
-
- // Negative type ids index into FilterIds, positive type ids index into
- // TypeInfos. The value written for a positive type id is just the type
- // id itself. For a negative type id, however, the value written is the
- // (negative) byte offset of the corresponding FilterIds entry. The byte
- // offset is usually equal to the type id, because the FilterIds entries
- // are written using a variable width encoding which outputs one byte per
- // entry as long as the value written is not too large, but can differ.
- // This kind of complication does not occur for positive type ids because
- // type infos are output using a fixed width encoding.
- // FilterOffsets[i] holds the byte offset corresponding to FilterIds[i].
- SmallVector<int, 16> FilterOffsets;
- FilterOffsets.reserve(FilterIds.size());
- int Offset = -1;
- for(std::vector<unsigned>::const_iterator I = FilterIds.begin(),
- E = FilterIds.end(); I != E; ++I) {
- FilterOffsets.push_back(Offset);
- Offset -= MCAsmInfo::getULEB128Size(*I);
- }
-
- // Compute the actions table and gather the first action index for each
- // landing pad site.
- SmallVector<ActionEntry, 32> Actions;
- SmallVector<unsigned, 64> FirstActions;
- FirstActions.reserve(LandingPads.size());
-
- int FirstAction = 0;
- unsigned SizeActions = 0;
- for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) {
- const LandingPadInfo *LP = LandingPads[i];
- const std::vector<int> &TypeIds = LP->TypeIds;
- const unsigned NumShared = i ? SharedTypeIds(LP, LandingPads[i-1]) : 0;
- unsigned SizeSiteActions = 0;
-
- if (NumShared < TypeIds.size()) {
- unsigned SizeAction = 0;
- ActionEntry *PrevAction = 0;
-
- if (NumShared) {
- const unsigned SizePrevIds = LandingPads[i-1]->TypeIds.size();
- assert(Actions.size());
- PrevAction = &Actions.back();
- SizeAction = MCAsmInfo::getSLEB128Size(PrevAction->NextAction) +
- MCAsmInfo::getSLEB128Size(PrevAction->ValueForTypeID);
- for (unsigned j = NumShared; j != SizePrevIds; ++j) {
- SizeAction -= MCAsmInfo::getSLEB128Size(PrevAction->ValueForTypeID);
- SizeAction += -PrevAction->NextAction;
- PrevAction = PrevAction->Previous;
- }
- }
-
- // Compute the actions.
- for (unsigned I = NumShared, M = TypeIds.size(); I != M; ++I) {
- int TypeID = TypeIds[I];
- assert(-1-TypeID < (int)FilterOffsets.size() && "Unknown filter id!");
- int ValueForTypeID = TypeID < 0 ? FilterOffsets[-1 - TypeID] : TypeID;
- unsigned SizeTypeID = MCAsmInfo::getSLEB128Size(ValueForTypeID);
-
- int NextAction = SizeAction ? -(SizeAction + SizeTypeID) : 0;
- SizeAction = SizeTypeID + MCAsmInfo::getSLEB128Size(NextAction);
- SizeSiteActions += SizeAction;
-
- ActionEntry Action = {ValueForTypeID, NextAction, PrevAction};
- Actions.push_back(Action);
-
- PrevAction = &Actions.back();
- }
-
- // Record the first action of the landing pad site.
- FirstAction = SizeActions + SizeSiteActions - SizeAction + 1;
- } // else identical - re-use previous FirstAction
-
- FirstActions.push_back(FirstAction);
-
- // Compute this sites contribution to size.
- SizeActions += SizeSiteActions;
- }
-
- // Compute the call-site table. Entries must be ordered by address.
- SmallVector<CallSiteEntry, 64> CallSites;
-
- RangeMapType PadMap;
- for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) {
- const LandingPadInfo *LandingPad = LandingPads[i];
- for (unsigned j=0, E = LandingPad->BeginLabels.size(); j != E; ++j) {
- MCSymbol *BeginLabel = LandingPad->BeginLabels[j];
- assert(!PadMap.count(BeginLabel) && "Duplicate landing pad labels!");
- PadRange P = { i, j };
- PadMap[BeginLabel] = P;
- }
- }
-
- bool MayThrow = false;
- MCSymbol *LastLabel = 0;
- for (MachineFunction::const_iterator I = MF->begin(), E = MF->end();
- I != E; ++I) {
- for (MachineBasicBlock::const_iterator MI = I->begin(), E = I->end();
- MI != E; ++MI) {
- if (!MI->isLabel()) {
- MayThrow |= MI->isCall();
- continue;
- }
-
- MCSymbol *BeginLabel = MI->getOperand(0).getMCSymbol();
- assert(BeginLabel && "Invalid label!");
-
- if (BeginLabel == LastLabel)
- MayThrow = false;
-
- RangeMapType::iterator L = PadMap.find(BeginLabel);
-
- if (L == PadMap.end())
- continue;
-
- PadRange P = L->second;
- const LandingPadInfo *LandingPad = LandingPads[P.PadIndex];
-
- assert(BeginLabel == LandingPad->BeginLabels[P.RangeIndex] &&
- "Inconsistent landing pad map!");
-
- // If some instruction between the previous try-range and this one may
- // throw, create a call-site entry with no landing pad for the region
- // between the try-ranges.
- if (MayThrow) {
- CallSiteEntry Site = {LastLabel, BeginLabel, 0, 0};
- CallSites.push_back(Site);
- }
-
- LastLabel = LandingPad->EndLabels[P.RangeIndex];
- CallSiteEntry Site = {BeginLabel, LastLabel,
- LandingPad->LandingPadLabel, FirstActions[P.PadIndex]};
-
- assert(Site.BeginLabel && Site.EndLabel && Site.PadLabel &&
- "Invalid landing pad!");
-
- // Try to merge with the previous call-site.
- if (CallSites.size()) {
- CallSiteEntry &Prev = CallSites.back();
- if (Site.PadLabel == Prev.PadLabel && Site.Action == Prev.Action) {
- // Extend the range of the previous entry.
- Prev.EndLabel = Site.EndLabel;
- continue;
- }
- }
-
- // Otherwise, create a new call-site.
- CallSites.push_back(Site);
- }
- }
- // If some instruction between the previous try-range and the end of the
- // function may throw, create a call-site entry with no landing pad for the
- // region following the try-range.
- if (MayThrow) {
- CallSiteEntry Site = {LastLabel, 0, 0, 0};
- CallSites.push_back(Site);
- }
-
- // Final tallies.
- unsigned SizeSites = CallSites.size() * (sizeof(int32_t) + // Site start.
- sizeof(int32_t) + // Site length.
- sizeof(int32_t)); // Landing pad.
- for (unsigned i = 0, e = CallSites.size(); i < e; ++i)
- SizeSites += MCAsmInfo::getULEB128Size(CallSites[i].Action);
-
- unsigned SizeTypes = TypeInfos.size() * TD->getPointerSize();
-
- unsigned TypeOffset = sizeof(int8_t) + // Call site format
- // Call-site table length
- MCAsmInfo::getULEB128Size(SizeSites) +
- SizeSites + SizeActions + SizeTypes;
-
- // Begin the exception table.
- JCE->emitAlignmentWithFill(4, 0);
- // Asm->EOL("Padding");
-
- unsigned char* DwarfExceptionTable = (unsigned char*)JCE->getCurrentPCValue();
-
- // Emit the header.
- JCE->emitByte(dwarf::DW_EH_PE_omit);
- // Asm->EOL("LPStart format (DW_EH_PE_omit)");
- JCE->emitByte(dwarf::DW_EH_PE_absptr);
- // Asm->EOL("TType format (DW_EH_PE_absptr)");
- JCE->emitULEB128Bytes(TypeOffset);
- // Asm->EOL("TType base offset");
- JCE->emitByte(dwarf::DW_EH_PE_udata4);
- // Asm->EOL("Call site format (DW_EH_PE_udata4)");
- JCE->emitULEB128Bytes(SizeSites);
- // Asm->EOL("Call-site table length");
-
- // Emit the landing pad site information.
- for (unsigned i = 0; i < CallSites.size(); ++i) {
- CallSiteEntry &S = CallSites[i];
- intptr_t BeginLabelPtr = 0;
- intptr_t EndLabelPtr = 0;
-
- if (!S.BeginLabel) {
- BeginLabelPtr = (intptr_t)StartFunction;
- JCE->emitInt32(0);
- } else {
- BeginLabelPtr = JCE->getLabelAddress(S.BeginLabel);
- JCE->emitInt32(BeginLabelPtr - (intptr_t)StartFunction);
- }
-
- // Asm->EOL("Region start");
-
- if (!S.EndLabel)
- EndLabelPtr = (intptr_t)EndFunction;
- else
- EndLabelPtr = JCE->getLabelAddress(S.EndLabel);
-
- JCE->emitInt32(EndLabelPtr - BeginLabelPtr);
- //Asm->EOL("Region length");
-
- if (!S.PadLabel) {
- JCE->emitInt32(0);
- } else {
- unsigned PadLabelPtr = JCE->getLabelAddress(S.PadLabel);
- JCE->emitInt32(PadLabelPtr - (intptr_t)StartFunction);
- }
- // Asm->EOL("Landing pad");
-
- JCE->emitULEB128Bytes(S.Action);
- // Asm->EOL("Action");
- }
-
- // Emit the actions.
- for (unsigned I = 0, N = Actions.size(); I != N; ++I) {
- ActionEntry &Action = Actions[I];
-
- JCE->emitSLEB128Bytes(Action.ValueForTypeID);
- //Asm->EOL("TypeInfo index");
- JCE->emitSLEB128Bytes(Action.NextAction);
- //Asm->EOL("Next action");
- }
-
- // Emit the type ids.
- for (unsigned M = TypeInfos.size(); M; --M) {
- const GlobalVariable *GV = TypeInfos[M - 1];
-
- if (GV) {
- if (TD->getPointerSize() == sizeof(int32_t))
- JCE->emitInt32((intptr_t)Jit.getOrEmitGlobalVariable(GV));
- else
- JCE->emitInt64((intptr_t)Jit.getOrEmitGlobalVariable(GV));
- } else {
- if (TD->getPointerSize() == sizeof(int32_t))
- JCE->emitInt32(0);
- else
- JCE->emitInt64(0);
- }
- // Asm->EOL("TypeInfo");
- }
-
- // Emit the filter typeids.
- for (unsigned j = 0, M = FilterIds.size(); j < M; ++j) {
- unsigned TypeID = FilterIds[j];
- JCE->emitULEB128Bytes(TypeID);
- //Asm->EOL("Filter TypeInfo index");
- }
-
- JCE->emitAlignmentWithFill(4, 0);
-
- return DwarfExceptionTable;
-}
-
-unsigned char*
-JITDwarfEmitter::EmitCommonEHFrame(const Function* Personality) const {
- unsigned PointerSize = TD->getPointerSize();
- int stackGrowth = stackGrowthDirection == TargetFrameLowering::StackGrowsUp ?
- PointerSize : -PointerSize;
-
- unsigned char* StartCommonPtr = (unsigned char*)JCE->getCurrentPCValue();
- // EH Common Frame header
- JCE->allocateSpace(4, 0);
- unsigned char* FrameCommonBeginPtr = (unsigned char*)JCE->getCurrentPCValue();
- JCE->emitInt32((int)0);
- JCE->emitByte(dwarf::DW_CIE_VERSION);
- JCE->emitString(Personality ? "zPLR" : "zR");
- JCE->emitULEB128Bytes(1);
- JCE->emitSLEB128Bytes(stackGrowth);
- JCE->emitByte(RI->getDwarfRegNum(RI->getRARegister(), true));
-
- if (Personality) {
- // Augmentation Size: 3 small ULEBs of one byte each, and the personality
- // function which size is PointerSize.
- JCE->emitULEB128Bytes(3 + PointerSize);
-
- // We set the encoding of the personality as direct encoding because we use
- // the function pointer. The encoding is not relative because the current
- // PC value may be bigger than the personality function pointer.
- if (PointerSize == 4) {
- JCE->emitByte(dwarf::DW_EH_PE_sdata4);
- JCE->emitInt32(((intptr_t)Jit.getPointerToGlobal(Personality)));
- } else {
- JCE->emitByte(dwarf::DW_EH_PE_sdata8);
- JCE->emitInt64(((intptr_t)Jit.getPointerToGlobal(Personality)));
- }
-
- // LSDA encoding: This must match the encoding used in EmitEHFrame ()
- if (PointerSize == 4)
- JCE->emitULEB128Bytes(dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4);
- else
- JCE->emitULEB128Bytes(dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata8);
- JCE->emitULEB128Bytes(dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4);
- } else {
- JCE->emitULEB128Bytes(1);
- JCE->emitULEB128Bytes(dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4);
- }
-
- EmitFrameMoves(0, MAI->getInitialFrameState());
-
- JCE->emitAlignmentWithFill(PointerSize, dwarf::DW_CFA_nop);
-
- JCE->emitInt32At((uintptr_t*)StartCommonPtr,
- (uintptr_t)((unsigned char*)JCE->getCurrentPCValue() -
- FrameCommonBeginPtr));
-
- return StartCommonPtr;
-}
-
-
-unsigned char*
-JITDwarfEmitter::EmitEHFrame(const Function* Personality,
- unsigned char* StartCommonPtr,
- unsigned char* StartFunction,
- unsigned char* EndFunction,
- unsigned char* ExceptionTable) const {
- unsigned PointerSize = TD->getPointerSize();
-
- // EH frame header.
- unsigned char* StartEHPtr = (unsigned char*)JCE->getCurrentPCValue();
- JCE->allocateSpace(4, 0);
- unsigned char* FrameBeginPtr = (unsigned char*)JCE->getCurrentPCValue();
- // FDE CIE Offset
- JCE->emitInt32(FrameBeginPtr - StartCommonPtr);
- JCE->emitInt32(StartFunction - (unsigned char*)JCE->getCurrentPCValue());
- JCE->emitInt32(EndFunction - StartFunction);
-
- // If there is a personality and landing pads then point to the language
- // specific data area in the exception table.
- if (Personality) {
- JCE->emitULEB128Bytes(PointerSize == 4 ? 4 : 8);
-
- if (PointerSize == 4) {
- if (!MMI->getLandingPads().empty())
- JCE->emitInt32(ExceptionTable-(unsigned char*)JCE->getCurrentPCValue());
- else
- JCE->emitInt32((int)0);
- } else {
- if (!MMI->getLandingPads().empty())
- JCE->emitInt64(ExceptionTable-(unsigned char*)JCE->getCurrentPCValue());
- else
- JCE->emitInt64((int)0);
- }
- } else {
- JCE->emitULEB128Bytes(0);
- }
-
- // Indicate locations of function specific callee saved registers in
- // frame.
- EmitFrameMoves((intptr_t)StartFunction, MMI->getFrameMoves());
-
- JCE->emitAlignmentWithFill(PointerSize, dwarf::DW_CFA_nop);
-
- // Indicate the size of the table
- JCE->emitInt32At((uintptr_t*)StartEHPtr,
- (uintptr_t)((unsigned char*)JCE->getCurrentPCValue() -
- StartEHPtr));
-
- // Double zeroes for the unwind runtime
- if (PointerSize == 8) {
- JCE->emitInt64(0);
- JCE->emitInt64(0);
- } else {
- JCE->emitInt32(0);
- JCE->emitInt32(0);
- }
-
- return StartEHPtr;
-}
diff --git a/lib/ExecutionEngine/JIT/JITEmitter.cpp b/lib/ExecutionEngine/JIT/JITEmitter.cpp
index c273876..d813c53 100644
--- a/lib/ExecutionEngine/JIT/JITEmitter.cpp
+++ b/lib/ExecutionEngine/JIT/JITEmitter.cpp
@@ -363,22 +363,16 @@
/// Instance of the JIT
JIT *TheJIT;
- bool JITExceptionHandling;
-
public:
JITEmitter(JIT &jit, JITMemoryManager *JMM, TargetMachine &TM)
: SizeEstimate(0), Resolver(jit, *this), MMI(0), CurFn(0),
- EmittedFunctions(this), TheJIT(&jit),
- JITExceptionHandling(TM.Options.JITExceptionHandling) {
+ EmittedFunctions(this), TheJIT(&jit) {
MemMgr = JMM ? JMM : JITMemoryManager::CreateDefaultMemManager();
if (jit.getJITInfo().needsGOT()) {
MemMgr->AllocateGOT();
DEBUG(dbgs() << "JIT is managing a GOT\n");
}
- if (JITExceptionHandling) {
- DE.reset(new JITDwarfEmitter(jit));
- }
}
~JITEmitter() {
delete MemMgr;
@@ -964,40 +958,6 @@
}
});
- if (JITExceptionHandling) {
- uintptr_t ActualSize = 0;
- SavedBufferBegin = BufferBegin;
- SavedBufferEnd = BufferEnd;
- SavedCurBufferPtr = CurBufferPtr;
- uint8_t *FrameRegister;
-
- while (true) {
- BufferBegin = CurBufferPtr = MemMgr->startExceptionTable(F.getFunction(),
- ActualSize);
- BufferEnd = BufferBegin+ActualSize;
- EmittedFunctions[F.getFunction()].ExceptionTable = BufferBegin;
- uint8_t *EhStart;
- FrameRegister = DE->EmitDwarfTable(F, *this, FnStart, FnEnd, EhStart);
-
- // If the buffer was large enough to hold the table then we are done.
- if (CurBufferPtr != BufferEnd)
- break;
-
- // Try again with twice as much space.
- ActualSize = (CurBufferPtr - BufferBegin) * 2;
- MemMgr->deallocateExceptionTable(BufferBegin);
- }
- MemMgr->endExceptionTable(F.getFunction(), BufferBegin, CurBufferPtr,
- FrameRegister);
- BufferBegin = SavedBufferBegin;
- BufferEnd = SavedBufferEnd;
- CurBufferPtr = SavedCurBufferPtr;
-
- if (JITExceptionHandling) {
- TheJIT->RegisterTable(F.getFunction(), FrameRegister);
- }
- }
-
if (MMI)
MMI->EndFunction();
@@ -1027,15 +987,10 @@
Emitted = EmittedFunctions.find(F);
if (Emitted != EmittedFunctions.end()) {
MemMgr->deallocateFunctionBody(Emitted->second.FunctionBody);
- MemMgr->deallocateExceptionTable(Emitted->second.ExceptionTable);
TheJIT->NotifyFreeingMachineCode(Emitted->second.Code);
EmittedFunctions.erase(Emitted);
}
-
- if (JITExceptionHandling) {
- TheJIT->DeregisterTable(F);
- }
}
diff --git a/lib/ExecutionEngine/JIT/JITMemoryManager.cpp b/lib/ExecutionEngine/JIT/JITMemoryManager.cpp
index 66aeb77..bf5680d 100644
--- a/lib/ExecutionEngine/JIT/JITMemoryManager.cpp
+++ b/lib/ExecutionEngine/JIT/JITMemoryManager.cpp
@@ -513,26 +513,6 @@
return false;
}
- /// startExceptionTable - Use startFunctionBody to allocate memory for the
- /// function's exception table.
- uint8_t* startExceptionTable(const Function* F, uintptr_t &ActualSize) {
- return startFunctionBody(F, ActualSize);
- }
-
- /// endExceptionTable - The exception table of F is now allocated,
- /// and takes the memory in the range [TableStart,TableEnd).
- void endExceptionTable(const Function *F, uint8_t *TableStart,
- uint8_t *TableEnd, uint8_t* FrameRegister) {
- assert(TableEnd > TableStart);
- assert(TableStart == (uint8_t *)(CurBlock+1) &&
- "Mismatched table start/end!");
-
- uintptr_t BlockSize = TableEnd - (uint8_t *)CurBlock;
-
- // Release the memory at the end of this block that isn't needed.
- FreeMemoryList =CurBlock->TrimAllocationToSize(FreeMemoryList, BlockSize);
- }
-
uint8_t *getGOTBase() const {
return GOTBase;
}
@@ -557,12 +537,6 @@
if (Body) deallocateBlock(Body);
}
- /// deallocateExceptionTable - Deallocate memory for the specified
- /// exception table.
- void deallocateExceptionTable(void *ET) {
- if (ET) deallocateBlock(ET);
- }
-
/// setMemoryWritable - When code generation is in progress,
/// the code pages may need permissions changed.
void setMemoryWritable()