#include "llvm/CodeGen/DwarfWriter.h"
+#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/FoldingSet.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/UniqueVector.h"
#include "llvm/Target/MRegisterInfo.h"
#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetFrameInfo.h"
+#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetOptions.h"
#include <ostream>
/// EmitFrameMoves - Emit frame instructions to describe the layout of the
/// frame.
void EmitFrameMoves(const char *BaseLabel, unsigned BaseLabelID,
- std::vector<MachineMove> &Moves) {
+ const std::vector<MachineMove> &Moves) {
int stackGrowth =
Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
TargetFrameInfo::StackGrowsUp ?
bool IsLocal = BaseLabel && strcmp(BaseLabel, "label") == 0;
for (unsigned i = 0, N = Moves.size(); i < N; ++i) {
- MachineMove &Move = Moves[i];
+ const MachineMove &Move = Moves[i];
unsigned LabelID = Move.getLabelID();
if (LabelID) {
///
bool shouldEmit;
+ struct FunctionDebugFrameInfo {
+ unsigned Number;
+ std::vector<MachineMove> Moves;
+
+ FunctionDebugFrameInfo(unsigned Num, const std::vector<MachineMove> &M):
+ Number(Num), Moves(M) { };
+ };
+
+ std::vector<FunctionDebugFrameInfo> DebugFrames;
+
public:
/// ShouldEmitDwarf - Returns true if Dwarf declarations should be made.
// Dwarf sections base addresses.
if (TAI->doesDwarfRequireFrameSection()) {
Asm->SwitchToDataSection(TAI->getDwarfFrameSection());
- EmitLabel("section_frame", 0);
+ EmitLabel("section_debug_frame", 0);
}
Asm->SwitchToDataSection(TAI->getDwarfInfoSection());
EmitLabel("section_info", 0);
EmitLabel("text_begin", 0);
Asm->SwitchToDataSection(TAI->getDataSection());
EmitLabel("data_begin", 0);
-
- // Emit common frame information.
- EmitInitialDebugFrame();
}
/// EmitDIE - Recusively Emits a debug information entry.
Asm->EOL();
}
- /// EmitInitialDebugFrame - Emit common frame info into a debug frame section.
+ /// EmitCommonDebugFrame - Emit common frame info into a debug frame section.
///
- void EmitInitialDebugFrame() {
+ void EmitCommonDebugFrame() {
if (!TAI->doesDwarfRequireFrameSection())
return;
// Start the dwarf frame section.
Asm->SwitchToDataSection(TAI->getDwarfFrameSection());
- EmitLabel("frame_common", 0);
- EmitDifference("frame_common_end", 0,
- "frame_common_begin", 0, true);
+ EmitLabel("debug_frame_common", 0);
+ EmitDifference("debug_frame_common_end", 0,
+ "debug_frame_common_begin", 0, true);
Asm->EOL("Length of Common Information Entry");
- EmitLabel("frame_common_begin", 0);
+ EmitLabel("debug_frame_common_begin", 0);
Asm->EmitInt32((int)DW_CIE_ID);
Asm->EOL("CIE Identifier Tag");
Asm->EmitInt8(DW_CIE_VERSION);
std::vector<MachineMove> Moves;
RI->getInitialFrameState(Moves);
+
EmitFrameMoves(NULL, 0, Moves);
Asm->EmitAlignment(2);
- EmitLabel("frame_common_end", 0);
+ EmitLabel("debug_frame_common_end", 0);
Asm->EOL();
}
/// EmitFunctionDebugFrame - Emit per function frame info into a debug frame
/// section.
- void EmitFunctionDebugFrame() {
+ void EmitFunctionDebugFrame(const FunctionDebugFrameInfo &DebugFrameInfo) {
if (!TAI->doesDwarfRequireFrameSection())
return;
// Start the dwarf frame section.
Asm->SwitchToDataSection(TAI->getDwarfFrameSection());
- EmitDifference("frame_end", SubprogramCount,
- "frame_begin", SubprogramCount, true);
+ EmitDifference("debug_frame_end", DebugFrameInfo.Number,
+ "debug_frame_begin", DebugFrameInfo.Number, true);
Asm->EOL("Length of Frame Information Entry");
- EmitLabel("frame_begin", SubprogramCount);
+ EmitLabel("debug_frame_begin", DebugFrameInfo.Number);
- EmitSectionOffset("frame_common_begin", "section_frame", 0, 0, true, false);
+ EmitSectionOffset("debug_frame_common", "section_debug_frame",
+ 0, 0, true, false);
Asm->EOL("FDE CIE offset");
- EmitReference("func_begin", SubprogramCount);
+ EmitReference("func_begin", DebugFrameInfo.Number);
Asm->EOL("FDE initial location");
- EmitDifference("func_end", SubprogramCount,
- "func_begin", SubprogramCount);
+ EmitDifference("func_end", DebugFrameInfo.Number,
+ "func_begin", DebugFrameInfo.Number);
Asm->EOL("FDE address range");
- std::vector<MachineMove> &Moves = MMI->getFrameMoves();
-
- EmitFrameMoves("func_begin", SubprogramCount, Moves);
+ EmitFrameMoves("func_begin", DebugFrameInfo.Number, DebugFrameInfo.Moves);
Asm->EmitAlignment(2);
- EmitLabel("frame_end", SubprogramCount);
+ EmitLabel("debug_frame_end", DebugFrameInfo.Number);
Asm->EOL();
}
Asm->SwitchToTextSection(SectionMap[i].c_str());
EmitLabel("section_end", i);
}
-
+
+ // Emit common frame information.
+ EmitCommonDebugFrame();
+
+ // Emit function debug frame information
+ for (std::vector<FunctionDebugFrameInfo>::iterator I = DebugFrames.begin(),
+ E = DebugFrames.end(); I != E; ++I)
+ EmitFunctionDebugFrame(*I);
+
// Compute DIE offsets and sizes.
SizeAndOffsets();
// Construct scopes for subprogram.
ConstructRootScope(MMI->getRootScope());
-
- // Emit function frame information.
- EmitFunctionDebugFrame();
+
+ DebugFrames.push_back(FunctionDebugFrameInfo(SubprogramCount,
+ MMI->getFrameMoves()));
}
};
class DwarfException : public Dwarf {
private:
+ struct FunctionEHFrameInfo {
+ std::string FnName;
+ unsigned Number;
+ unsigned PersonalityIndex;
+ bool hasCalls;
+ bool hasLandingPads;
+ std::vector<MachineMove> Moves;
- /// didInitial - Flag to indicate if initial emission has been done.
- ///
- bool didInitial;
-
+ FunctionEHFrameInfo(const std::string &FN, unsigned Num, unsigned P,
+ bool hC, bool hL,
+ const std::vector<MachineMove> &M):
+ FnName(FN), Number(Num), PersonalityIndex(P),
+ hasCalls(hC), hasLandingPads(hL), Moves(M) { };
+ };
+
+ std::vector<FunctionEHFrameInfo> EHFrames;
+
/// shouldEmit - Flag to indicate if debug information should be emitted.
///
bool shouldEmit;
- /// FuncCPPPersonality - C++ personality function.
- ///
- Function *FuncCPPPersonality;
-
/// EmitCommonEHFrame - Emit the common eh unwind frame.
///
- void EmitCommonEHFrame() {
- // Only do it once.
- if (didInitial) return;
- didInitial = true;
-
- // If there is a personality present then we need to indicate that
- // in the common eh frame.
- Function *Personality = FuncCPPPersonality;
-
+ void EmitCommonEHFrame(const Function *Personality, unsigned Index) {
// Size and sign of stack growth.
int stackGrowth =
Asm->TM.getFrameInfo()->getStackGrowthDirection() ==
// Begin eh frame section.
Asm->SwitchToTextSection(TAI->getDwarfEHFrameSection());
- O << "EH_frame:\n";
- EmitLabel("section_eh_frame", 0);
+ O << "EH_frame" << Index << ":\n";
+ EmitLabel("section_eh_frame", Index);
// Define base labels.
- EmitLabel("eh_frame_common", 0);
+ EmitLabel("eh_frame_common", Index);
// Define the eh frame length.
- EmitDifference("eh_frame_common_end", 0,
- "eh_frame_common_begin", 0, true);
+ EmitDifference("eh_frame_common_end", Index,
+ "eh_frame_common_begin", Index, true);
Asm->EOL("Length of Common Information Entry");
// EH frame header.
- EmitLabel("eh_frame_common_begin", 0);
+ EmitLabel("eh_frame_common_begin", Index);
Asm->EmitInt32((int)0);
Asm->EOL("CIE Identifier Tag");
Asm->EmitInt8(DW_CIE_VERSION);
EmitFrameMoves(NULL, 0, Moves);
Asm->EmitAlignment(2);
- EmitLabel("eh_frame_common_end", 0);
+ EmitLabel("eh_frame_common_end", Index);
Asm->EOL();
}
- /// EmitEHFrame - Emit initial exception information.
+ /// EmitEHFrame - Emit function exception frame information.
///
- void EmitEHFrame() {
- // If there is a personality present then we need to indicate that
- // in the common eh frame.
- Function *Personality = FuncCPPPersonality;
-// Function *Personality = MMI->getPersonality();
- MachineFrameInfo *MFI = MF->getFrameInfo();
-
+ void EmitEHFrame(const FunctionEHFrameInfo &EHFrameInfo) {
Asm->SwitchToTextSection(TAI->getDwarfEHFrameSection());
// Externally visible entry into the functions eh frame info.
if (const char *GlobalDirective = TAI->getGlobalDirective())
- O << GlobalDirective << getAsm()->CurrentFnName << ".eh\n";
+ O << GlobalDirective << EHFrameInfo.FnName << ".eh\n";
// If there are no calls then you can't unwind.
- if (!MFI->hasCalls()) {
- O << getAsm()->CurrentFnName << ".eh = 0\n";
+ if (!EHFrameInfo.hasCalls) {
+ O << EHFrameInfo.FnName << ".eh = 0\n";
} else {
- O << getAsm()->CurrentFnName << ".eh:\n";
+ O << EHFrameInfo.FnName << ".eh:\n";
// EH frame header.
- EmitDifference("eh_frame_end", SubprogramCount,
- "eh_frame_begin", SubprogramCount, true);
+ EmitDifference("eh_frame_end", EHFrameInfo.Number,
+ "eh_frame_begin", EHFrameInfo.Number, true);
Asm->EOL("Length of Frame Information Entry");
- EmitLabel("eh_frame_begin", SubprogramCount);
+ EmitLabel("eh_frame_begin", EHFrameInfo.Number);
EmitSectionOffset("eh_frame_begin", "section_eh_frame",
- SubprogramCount, 0, true, true);
+ EHFrameInfo.Number, EHFrameInfo.PersonalityIndex,
+ true, true);
Asm->EOL("FDE CIE offset");
- EmitReference("eh_func_begin", SubprogramCount, true);
+ EmitReference("eh_func_begin", EHFrameInfo.Number, true);
Asm->EOL("FDE initial location");
- EmitDifference("eh_func_end", SubprogramCount,
- "eh_func_begin", SubprogramCount);
+ EmitDifference("eh_func_end", EHFrameInfo.Number,
+ "eh_func_begin", EHFrameInfo.Number);
Asm->EOL("FDE address range");
// If there is a personality and landing pads then point to the language
// specific data area in the exception table.
- if (Personality) {
+ if (EHFrameInfo.PersonalityIndex) {
Asm->EmitULEB128Bytes(4);
Asm->EOL("Augmentation size");
- if (!MMI->getLandingPads().empty()) {
- EmitReference("exception", SubprogramCount, true);
+ if (EHFrameInfo.hasLandingPads) {
+ EmitReference("exception", EHFrameInfo.Number, true);
} else if(TAI->getAddressSize() == 8) {
Asm->EmitInt64((int)0);
} else {
// Indicate locations of function specific callee saved registers in
// frame.
- std::vector<MachineMove> &Moves = MMI->getFrameMoves();
- EmitFrameMoves("eh_func_begin", SubprogramCount, Moves);
+ EmitFrameMoves("eh_func_begin", EHFrameInfo.Number, EHFrameInfo.Moves);
Asm->EmitAlignment(2);
- EmitLabel("eh_frame_end", SubprogramCount);
+ EmitLabel("eh_frame_end", EHFrameInfo.Number);
}
if (const char *UsedDirective = TAI->getUsedDirective())
- O << UsedDirective << getAsm()->CurrentFnName << ".eh\n\n";
+ O << UsedDirective << EHFrameInfo.FnName << ".eh\n\n";
}
/// EmitExceptionTable - Emit landpads and actions.
/// found the the frame is unwound and handling continues.
/// 3. Type id table contains references to all the C++ typeinfo for all
/// catches in the function. This tables is reversed indexed base 1.
+
+ struct KeyInfo {
+ static inline unsigned getEmptyKey() { return -1U; }
+ static inline unsigned getTombstoneKey() { return -2U; }
+ static unsigned getHashValue(const unsigned &Key) { return Key; }
+ static bool isPod() { return true; }
+ };
+
+ struct PadSite {
+ unsigned PadIndex;
+ unsigned SiteIndex;
+ };
+
+ typedef DenseMap<unsigned, PadSite, KeyInfo> PadMapType;
+
void EmitExceptionTable() {
// Map all labels and get rid of any dead landing pads.
MMI->TidyLandingPads();
const LandingPadInfo *Filter = 0;
// Compute sizes for exception table.
- unsigned SizeHeader = sizeof(int8_t) + // LPStart format
- sizeof(int8_t) + // TType format
- sizeof(int8_t) + // TType base offset (NEED ULEB128)
- sizeof(int8_t) + // Call site format
- sizeof(int8_t); // Call-site table length
unsigned SizeSites = 0;
unsigned SizeActions = 0;
const std::vector<unsigned> &TypeIds = LandingPad.TypeIds;
unsigned SizeAction = 0;
signed FirstAction;
-
+
if (IsFilter) {
// FIXME - Assume there is only one filter typeinfo list per function
// time being. I.E., Each call to eh_filter will have the same list.
} else {
// Gather the action sizes
for (unsigned j = 0, M = TypeIds.size(); j != M; ++j) {
- unsigned TypeID = TypeIds[i];
+ unsigned TypeID = TypeIds[j];
unsigned SizeTypeID = Asm->SizeSLEB128(TypeID);
signed Action = j ? -(SizeAction + SizeTypeID) : 0;
SizeAction = SizeTypeID + Asm->SizeSLEB128(Action);
// Record the first action of the landing pad site.
FirstAction = SizeActions + SizeSiteActions - SizeAction + 1;
}
-
Actions.push_back(FirstAction);
-
+
// Compute this sites contribution to size.
SizeActions += SizeSiteActions;
- SizeSites += sizeof(int32_t) + // Site start.
- sizeof(int32_t) + // Site length.
- sizeof(int32_t) + // Landing pad.
- Asm->SizeSLEB128(FirstAction); // Action.
+ unsigned M = LandingPad.BeginLabels.size();
+ SizeSites += M*(sizeof(int32_t) + // Site start.
+ sizeof(int32_t) + // Site length.
+ sizeof(int32_t) + // Landing pad.
+ Asm->SizeULEB128(FirstAction)); // Action.
}
// Final tallies.
unsigned SizeTypes = TypeInfos.size() * TAI->getAddressSize();
- unsigned SizePreType = SizeHeader + SizeSites + SizeActions;
- unsigned SizeAlign = (4 - SizePreType) & 3;
- unsigned TypeOffset = SizePreType +
- SizeTypes +
- SizeAlign -
- sizeof(int8_t) - // LPStart format
- sizeof(int8_t) - // TType format
- sizeof(int8_t); // TType base offset (NEED ULEB128)
-
+
+ unsigned TypeOffset = sizeof(int8_t) + // Call site format
+ Asm->SizeULEB128(SizeSites) + // Call-site table length
+ SizeSites + SizeActions + SizeTypes;
+
+ unsigned TotalSize = sizeof(int8_t) + // LPStart format
+ sizeof(int8_t) + // TType format
+ Asm->SizeULEB128(TypeOffset) + // TType base offset
+ TypeOffset;
+
+ unsigned SizeAlign = (4 - TotalSize) & 3;
+
// Begin the exception table.
Asm->SwitchToDataSection(TAI->getDwarfExceptionSection());
O << "GCC_except_table" << SubprogramCount << ":\n";
+ Asm->EmitAlignment(2);
+ for (unsigned i = 0; i != SizeAlign; ++i) {
+ Asm->EmitInt8(0);
+ Asm->EOL("Padding");
+ }
EmitLabel("exception", SubprogramCount);
-
+
// Emit the header.
Asm->EmitInt8(DW_EH_PE_omit);
Asm->EOL("LPStart format (DW_EH_PE_omit)");
Asm->EOL("Call site format (DW_EH_PE_udata4)");
Asm->EmitULEB128Bytes(SizeSites);
Asm->EOL("Call-site table length");
-
- // Emit the landng pad site information.
+
+ // Emit the landing pad site information in order of address.
+ PadMapType PadMap;
+
for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) {
const LandingPadInfo &LandingPad = LandingPads[i];
- EmitSectionOffset("label", "eh_func_begin",
- LandingPad.BeginLabel, SubprogramCount, false, true);
- Asm->EOL("Region start");
-
- EmitDifference("label", LandingPad.EndLabel,
- "label", LandingPad.BeginLabel);
- Asm->EOL("Region length");
-
- if (LandingPad.TypeIds.empty()) {
- if (TAI->getAddressSize() == sizeof(int32_t))
- Asm->EmitInt32(0);
- else
- Asm->EmitInt64(0);
- } else {
- EmitSectionOffset("label", "eh_func_begin", LandingPad.LandingPadLabel,
- SubprogramCount, false, true);
+ for (unsigned j=0, E = LandingPad.BeginLabels.size(); j != E; ++j) {
+ unsigned BeginLabel = LandingPad.BeginLabels[j];
+ assert(!PadMap.count(BeginLabel) && "duplicate landing pad labels!");
+ PadSite P = { i, j };
+ PadMap[BeginLabel] = P;
}
- Asm->EOL("Landing pad");
+ }
- Asm->EmitULEB128Bytes(Actions[i]);
- Asm->EOL("Action");
+ 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->getOpcode() != TargetInstrInfo::LABEL)
+ continue;
+
+ unsigned BeginLabel = MI->getOperand(0).getImmedValue();
+ PadMapType::iterator L = PadMap.find(BeginLabel);
+
+ if (L == PadMap.end())
+ continue;
+
+ PadSite P = L->second;
+ const LandingPadInfo &LandingPad = LandingPads[P.PadIndex];
+
+ assert(BeginLabel == LandingPad.BeginLabels[P.SiteIndex] &&
+ "Inconsistent landing pad map!");
+
+ EmitSectionOffset("label", "eh_func_begin", BeginLabel, SubprogramCount,
+ false, true);
+ Asm->EOL("Region start");
+
+ EmitDifference("label", LandingPad.EndLabels[P.SiteIndex],
+ "label", BeginLabel);
+ Asm->EOL("Region length");
+
+ if (LandingPad.TypeIds.empty()) {
+ if (TAI->getAddressSize() == sizeof(int32_t))
+ Asm->EmitInt32(0);
+ else
+ Asm->EmitInt64(0);
+ } else {
+ EmitSectionOffset("label", "eh_func_begin", LandingPad.LandingPadLabel,
+ SubprogramCount, false, true);
+ }
+ Asm->EOL("Landing pad");
+
+ Asm->EmitULEB128Bytes(Actions[P.PadIndex]);
+ Asm->EOL("Action");
+ }
}
-
+
// Emit the actions.
for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) {
const LandingPadInfo &LandingPad = LandingPads[i];
}
// Emit the type ids.
- Asm->EmitAlignment(2);
for (unsigned M = TypeInfos.size(); M; --M) {
GlobalVariable *GV = TypeInfos[M - 1];
//
DwarfException(std::ostream &OS, AsmPrinter *A, const TargetAsmInfo *T)
: Dwarf(OS, A, T)
- , didInitial(false)
, shouldEmit(false)
- , FuncCPPPersonality(NULL)
{}
virtual ~DwarfException() {}
/// content.
void BeginModule(Module *M) {
this->M = M;
- FuncCPPPersonality = M->getFunction("__gxx_personality_v0");
}
/// EndModule - Emit all exception information that should come after the
/// content.
void EndModule() {
+ if (!shouldEmit) return;
+
+ const std::vector<Function *> Personalities = MMI->getPersonalities();
+ for (unsigned i =0; i < Personalities.size(); ++i)
+ EmitCommonEHFrame(Personalities[i], i);
+
+ for (std::vector<FunctionEHFrameInfo>::iterator I = EHFrames.begin(),
+ E = EHFrames.end(); I != E; ++I)
+ EmitEHFrame(*I);
}
/// BeginFunction - Gather pre-function exception information. Assumes being
EmitLabel("eh_func_end", SubprogramCount);
EmitExceptionTable();
- EmitCommonEHFrame();
- EmitEHFrame();
+
+ // Save EH frame information
+ EHFrames.push_back(FunctionEHFrameInfo(getAsm()->CurrentFnName,
+ SubprogramCount,
+ MMI->getPersonalityIndex(),
+ MF->getFrameInfo()->hasCalls(),
+ !MMI->getLandingPads().empty(),
+ MMI->getFrameMoves()));
}
};
projects / oota-llvm.git / blobdiff