// Prints one unwind code. Because an unwind code can occupy up to 3 slots in
// the unwind codes array, this function requires that the correct number of
// slots is provided.
void Dumper::printUnwindCode(const UnwindInfo& UI, ArrayRef<UnwindCode> UC) {
assert(UC.size() >= getNumUsedSlots(UC[0]));
SW.startLine() << format("0x%02X: ", unsigned(UC[0].u.CodeOffset))
<< getUnwindCodeTypeName(UC[0].getUnwindOp());
switch (UC[0].getUnwindOp()) {
case UOP_PushNonVol:
OS << " reg=" << getUnwindRegisterName(UC[0].getOpInfo());
break;
case UOP_AllocLarge:
OS << " size="
<< ((UC[0].getOpInfo() == 0) ? UC[1].FrameOffset * 8
: getLargeSlotValue(UC));
break;
case UOP_AllocSmall:
OS << " size=" << (UC[0].getOpInfo() + 1) * 8;
break;
case UOP_SetFPReg:
if (UI.getFrameRegister() == 0)
OS << " reg=<invalid>";
else
OS << " reg=" << getUnwindRegisterName(UI.getFrameRegister())
<< format(", offset=0x%X", UI.getFrameOffset() * 16);
break;
case UOP_SaveNonVol:
OS << " reg=" << getUnwindRegisterName(UC[0].getOpInfo())
<< format(", offset=0x%X", UC[1].FrameOffset * 8);
break;
case UOP_SaveNonVolBig:
OS << " reg=" << getUnwindRegisterName(UC[0].getOpInfo())
<< format(", offset=0x%X", getLargeSlotValue(UC));
break;
case UOP_SaveXMM128:
OS << " reg=XMM" << static_cast<uint32_t>(UC[0].getOpInfo())
<< format(", offset=0x%X", UC[1].FrameOffset * 16);
break;
case UOP_SaveXMM128Big:
OS << " reg=XMM" << static_cast<uint32_t>(UC[0].getOpInfo())
<< format(", offset=0x%X", getLargeSlotValue(UC));
break;
case UOP_PushMachFrame:
OS << " errcode=" << (UC[0].getOpInfo() == 0 ? "no" : "yes");
break;
}
OS << "\n";
}
void Dumper::printUnwindInfo(const Context &Ctx, const coff_section *Section,
off_t Offset, const UnwindInfo &UI) {
DictScope UIS(SW, "UnwindInfo");
SW.printNumber("Version", UI.getVersion());
SW.printFlags("Flags", UI.getFlags(), makeArrayRef(UnwindFlags));
SW.printNumber("PrologSize", UI.PrologSize);
if (UI.getFrameRegister()) {
SW.printEnum("FrameRegister", UI.getFrameRegister(),
makeArrayRef(UnwindOpInfo));
SW.printHex("FrameOffset", UI.getFrameOffset());
} else {
SW.printString("FrameRegister", StringRef("-"));
SW.printString("FrameOffset", StringRef("-"));
}
SW.printNumber("UnwindCodeCount", UI.NumCodes);
{
ListScope UCS(SW, "UnwindCodes");
ArrayRef<UnwindCode> UC(&UI.UnwindCodes[0], UI.NumCodes);
for (const UnwindCode *UCI = UC.begin(), *UCE = UC.end(); UCI < UCE; ++UCI) {
unsigned UsedSlots = getNumUsedSlots(*UCI);
if (UsedSlots > UC.size()) {
errs() << "corrupt unwind data";
return;
}
printUnwindCode(UI, ArrayRef<UnwindCode>(UCI, UCE));
UCI = UCI + UsedSlots - 1;
}
}
uint64_t LSDAOffset = Offset + getOffsetOfLSDA(UI);
if (UI.getFlags() & (UNW_ExceptionHandler | UNW_TerminateHandler)) {
SW.printString("Handler",
formatSymbol(Ctx, Section, LSDAOffset,
UI.getLanguageSpecificHandlerOffset()));
} else if (UI.getFlags() & UNW_ChainInfo) {
if (const RuntimeFunction *Chained = UI.getChainedFunctionEntry()) {
DictScope CS(SW, "Chained");
printRuntimeFunctionEntry(Ctx, Section, LSDAOffset, *Chained);
}
}
}