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Implement the StartChained and EndChained Win64 EH methods on MCStreamer.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@131629 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Charles Davis 2011-05-19 04:04:13 +00:00
parent d76773a221
commit 91d9a1c0f7
3 changed files with 27 additions and 16 deletions
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3
include/llvm/MC/MCStreamer.h
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@ -59,7 +59,8 @@ namespace llvm {
void EnsureValidFrame();
std::vector<MCWin64EHUnwindInfo> W64UnwindInfos;
MCWin64EHUnwindInfo *getCurrentW64UnwindInfo();
MCWin64EHUnwindInfo *CurrentW64UnwindInfo;
void setCurrentW64UnwindInfo(MCWin64EHUnwindInfo *Frame);
void EnsureValidW64UnwindInfo();
const MCSymbol* LastNonPrivate;

4
include/llvm/MC/MCWin64EH.h
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@ -64,7 +64,7 @@ namespace llvm {
struct MCWin64EHUnwindInfo {
MCWin64EHUnwindInfo() : Begin(0), End(0), ExceptionHandler(0), Lsda(0),
Function(0), UnwindOnly(false), LsdaSize(0),
PrologSize(0), LastFrameInst(-1), Chained(false),
PrologSize(0), LastFrameInst(-1), ChainedParent(0),
Instructions() {}
MCSymbol *Begin;
MCSymbol *End;
@ -75,7 +75,7 @@ namespace llvm {
unsigned LsdaSize;
unsigned PrologSize;
int LastFrameInst;
bool Chained;
MCWin64EHUnwindInfo *ChainedParent;
std::vector<MCWin64EHInstruction> Instructions;
};

36
lib/MC/MCStreamer.cpp
View File

@ -310,20 +310,19 @@ void MCStreamer::EmitCFISameValue(int64_t Register) {
CurFrame->Instructions.push_back(Instruction);
}
MCWin64EHUnwindInfo *MCStreamer::getCurrentW64UnwindInfo() {
if (W64UnwindInfos.empty())
return NULL;
return &W64UnwindInfos.back();
void MCStreamer::setCurrentW64UnwindInfo(MCWin64EHUnwindInfo *Frame) {
W64UnwindInfos.push_back(*Frame);
CurrentW64UnwindInfo = &W64UnwindInfos.back();
}
void MCStreamer::EnsureValidW64UnwindInfo() {
MCWin64EHUnwindInfo *CurFrame = getCurrentW64UnwindInfo();
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
if (!CurFrame || CurFrame->End)
report_fatal_error("No open Win64 EH frame function!");
}
void MCStreamer::EmitWin64EHStartProc(MCSymbol *Symbol, MCSymbol *EHandler) {
MCWin64EHUnwindInfo *CurFrame = getCurrentW64UnwindInfo();
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
if (CurFrame && !CurFrame->End)
report_fatal_error("Starting a function before ending the previous one!");
MCWin64EHUnwindInfo Frame;
@ -331,13 +330,13 @@ void MCStreamer::EmitWin64EHStartProc(MCSymbol *Symbol, MCSymbol *EHandler) {
Frame.Function = Symbol;
Frame.ExceptionHandler = EHandler;
EmitLabel(Frame.Begin);
W64UnwindInfos.push_back(Frame);
setCurrentW64UnwindInfo(&Frame);
}
void MCStreamer::EmitWin64EHEndProc() {
EnsureValidW64UnwindInfo();
MCWin64EHUnwindInfo *CurFrame = getCurrentW64UnwindInfo();
if (CurFrame->Chained)
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
if (CurFrame->ChainedParent)
report_fatal_error("Not all chained regions terminated!");
CurFrame->End = getContext().CreateTempSymbol();
EmitLabel(CurFrame->End);
@ -345,14 +344,25 @@ void MCStreamer::EmitWin64EHEndProc() {
void MCStreamer::EmitWin64EHStartChained()
{
errs() << "Not implemented yet\n";
abort();
EnsureValidW64UnwindInfo();
MCWin64EHUnwindInfo Frame;
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
Frame.Begin = getContext().CreateTempSymbol();
Frame.Function = CurFrame->Function;
Frame.ChainedParent = CurFrame;
EmitLabel(Frame.Begin);
setCurrentW64UnwindInfo(&Frame);
}
void MCStreamer::EmitWin64EHEndChained()
{
errs() << "Not implemented yet\n";
abort();
EnsureValidW64UnwindInfo();
MCWin64EHUnwindInfo *CurFrame = CurrentW64UnwindInfo;
if (!CurFrame->ChainedParent)
report_fatal_error("End of a chained region outside a chained region!");
CurFrame->End = getContext().CreateTempSymbol();
EmitLabel(CurFrame->End);
CurrentW64UnwindInfo = CurFrame->ChainedParent;
}
void MCStreamer::EmitWin64EHUnwindOnly()