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A handler for a function in the Win64 EH scheme can be both an unwind handler

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and an exception handler. Handle that case.

Also, add an 'Emitted' member to the MCWin64EHUnwindInfo struct. It will be
needed later.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131791 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Charles Davis 2011-05-21 15:57:49 +00:00
parent c21b205f93
commit 321fe74b2d
2 changed files with 15 additions and 10 deletions
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17
include/llvm/MC/MCWin64EH.h
View File

@ -7,8 +7,8 @@
//
//===----------------------------------------------------------------------===//
//
// This file contains the declaration of the MCDwarfFile to support the dwarf
// .file directive and the .loc directive.
// This file contains declarations to support the Win64 Exception Handling
// scheme in MC.
//
//===----------------------------------------------------------------------===//
@ -59,26 +59,29 @@ namespace llvm {
struct MCWin64EHUnwindInfo {
MCWin64EHUnwindInfo() : Begin(0), End(0), ExceptionHandler(0),
Function(0), PrologEnd(0), UnwindOnly(false),
LastFrameInst(-1), ChainedParent(0),
Instructions() {}
Function(0), PrologEnd(0), HandlesUnwind(false),
HandlesExceptions(false), LastFrameInst(-1),
ChainedParent(0), Instructions(), Emitted(false) {}
MCSymbol *Begin;
MCSymbol *End;
const MCSymbol *ExceptionHandler;
const MCSymbol *Function;
MCSymbol *PrologEnd;
bool UnwindOnly;
bool HandlesUnwind;
bool HandlesExceptions;
int LastFrameInst;
MCWin64EHUnwindInfo *ChainedParent;
std::vector<MCWin64EHInstruction> Instructions;
bool Emitted;
};
class MCWin64EHUnwindEmitter {
public:
//
// This emits the unwind info section (.xdata in PE/COFF).
// This emits the unwind info sections (.pdata and .xdata in PE/COFF).
//
static void Emit(MCStreamer &streamer);
static void EmitUnwindInfo(MCStreamer &streamer, MCWin64EHUnwindInfo *info);
};
} // end namespace llvm

8
lib/MC/MCStreamer.cpp
View File

@ -362,10 +362,12 @@ void MCStreamer::EmitWin64EHHandler(const MCSymbol *Sym, bool Unwind,
EnsureValidW64UnwindInfo();
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
CurFrame->ExceptionHandler = Sym;
if (Unwind)
CurFrame->UnwindOnly = true;
else if (!Except)
if (!Except && !Unwind)
report_fatal_error("Don't know what kind of handler this is!");
if (Unwind)
CurFrame->HandlesUnwind = true;
if (Except)
CurFrame->HandlesExceptions = true;
}
void MCStreamer::EmitWin64EHHandlerData() {