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[WinEH] Run cleanup handlers when an exception is thrown

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Generate tables in the .xdata section representing what actions to take
when an exception is thrown.  This currently fills in state for
cleanups, catch handlers are still unfinished.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@233636 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
David Majnemer
2015-03-30 22:58:10 +00:00
parent 1c8595529b
commit 0a8ff297ad
26 changed files with 863 additions and 129 deletions
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22
lib/CodeGen/MachineModuleInfo.cpp
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@@ -14,6 +14,7 @@
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/Passes.h"
#include "llvm/CodeGen/WinEHFuncInfo.h"
#include "llvm/IR/Constants.h"
#include "llvm/IR/DerivedTypes.h"
#include "llvm/IR/GlobalVariable.h"
@@ -425,6 +426,12 @@ void MachineModuleInfo::addPersonality(MachineBasicBlock *LandingPad,
Personalities.push_back(Personality);
}
void MachineModuleInfo::addWinEHState(MachineBasicBlock *LandingPad,
int State) {
LandingPadInfo &LP = getOrCreateLandingPadInfo(LandingPad);
LP.WinEHState = State;
}
/// addCatchTypeInfo - Provide the catch typeinfo for a landing pad.
///
void MachineModuleInfo::
@@ -588,3 +595,18 @@ unsigned MachineModuleInfo::getPersonalityIndex() const {
// in the zero index.
return 0;
}
const Function *MachineModuleInfo::getWinEHParent(const Function *F) const {
StringRef WinEHParentName =
F->getFnAttribute("wineh-parent").getValueAsString();
if (WinEHParentName.empty() || WinEHParentName == F->getName())
return F;
return F->getParent()->getFunction(WinEHParentName);
}
WinEHFuncInfo &MachineModuleInfo::getWinEHFuncInfo(const Function *F) {
auto &Ptr = FuncInfoMap[getWinEHParent(F)];
if (!Ptr)
Ptr.reset(new WinEHFuncInfo);
return *Ptr;
}