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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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29
include/llvm/CodeGen/MachineModuleInfo.h
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@ -58,22 +58,25 @@ class MachineFunction;
class Module;
class PointerType;
class StructType;
struct WinEHFuncInfo;
//===----------------------------------------------------------------------===//
/// LandingPadInfo - This structure is used to retain landing pad info for
/// the current function.
///
struct LandingPadInfo {
MachineBasicBlock *LandingPadBlock; // Landing pad block.
SmallVector<MCSymbol*, 1> BeginLabels; // Labels prior to invoke.
SmallVector<MCSymbol*, 1> EndLabels; // Labels after invoke.
SmallVector<MCSymbol*, 1> ClauseLabels; // Labels for each clause.
MCSymbol *LandingPadLabel; // Label at beginning of landing pad.
const Function *Personality; // Personality function.
std::vector<int> TypeIds; // List of type ids (filters negative)
MachineBasicBlock *LandingPadBlock; // Landing pad block.
SmallVector<MCSymbol *, 1> BeginLabels; // Labels prior to invoke.
SmallVector<MCSymbol *, 1> EndLabels; // Labels after invoke.
SmallVector<MCSymbol *, 1> ClauseLabels; // Labels for each clause.
MCSymbol *LandingPadLabel; // Label at beginning of landing pad.
const Function *Personality; // Personality function.
std::vector<int> TypeIds; // List of type ids (filters negative).
int WinEHState; // WinEH specific state number.
explicit LandingPadInfo(MachineBasicBlock *MBB)
: LandingPadBlock(MBB), LandingPadLabel(nullptr), Personality(nullptr) {}
: LandingPadBlock(MBB), LandingPadLabel(nullptr), Personality(nullptr),
WinEHState(-1) {}
};
//===----------------------------------------------------------------------===//
@ -172,6 +175,8 @@ class MachineModuleInfo : public ImmutablePass {
EHPersonality PersonalityTypeCache;
DenseMap<const Function *, std::unique_ptr<WinEHFuncInfo>> FuncInfoMap;
public:
static char ID; // Pass identification, replacement for typeid
@ -207,6 +212,12 @@ public:
void setModule(const Module *M) { TheModule = M; }
const Module *getModule() const { return TheModule; }
const Function *getWinEHParent(const Function *F) const;
WinEHFuncInfo &getWinEHFuncInfo(const Function *F);
bool hasWinEHFuncInfo(const Function *F) const {
return FuncInfoMap.count(getWinEHParent(F)) > 0;
}
/// getInfo - Keep track of various per-function pieces of information for
/// backends that would like to do so.
///
@ -304,6 +315,8 @@ public:
void addPersonality(MachineBasicBlock *LandingPad,
const Function *Personality);
void addWinEHState(MachineBasicBlock *LandingPad, int State);
/// getPersonalityIndex - Get index of the current personality function inside
/// Personalitites array
unsigned getPersonalityIndex() const;