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Use an index instead of pointers into the vector. If the vector resizes, then 

the pointer values could be invalid.

llvm-svn: 95813
This commit is contained in:
Bill Wendling 2010-02-10 21:41:57 +00:00
parent c55042c20f
commit 7742b6406b
2 changed files with 13 additions and 12 deletions
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23
llvm/lib/CodeGen/AsmPrinter/DwarfException.cpp
View File

@ -407,20 +407,22 @@ ComputeActionsTable(const SmallVectorImpl<const LandingPadInfo*> &LandingPads,
if (NumShared < TypeIds.size()) {
unsigned SizeAction = 0;
ActionEntry *PrevAction = 0;
unsigned PrevAction = (unsigned)-1;
if (NumShared) {
const unsigned SizePrevIds = PrevLPI->TypeIds.size();
assert(Actions.size());
PrevAction = &Actions.back();
SizeAction = MCAsmInfo::getSLEB128Size(PrevAction->NextAction) +
MCAsmInfo::getSLEB128Size(PrevAction->ValueForTypeID);
PrevAction = Actions.size() - 1;
SizeAction =
MCAsmInfo::getSLEB128Size(Actions[PrevAction].NextAction) +
MCAsmInfo::getSLEB128Size(Actions[PrevAction].ValueForTypeID);
for (unsigned j = NumShared; j != SizePrevIds; ++j) {
assert(PrevAction != (unsigned)-1 && "PrevAction is invalid!");
SizeAction -=
MCAsmInfo::getSLEB128Size(PrevAction->ValueForTypeID);
SizeAction += -PrevAction->NextAction;
PrevAction = PrevAction->Previous;
MCAsmInfo::getSLEB128Size(Actions[PrevAction].ValueForTypeID);
SizeAction += -Actions[PrevAction].NextAction;
PrevAction = Actions[PrevAction].Previous;
}
}
@ -437,7 +439,7 @@ ComputeActionsTable(const SmallVectorImpl<const LandingPadInfo*> &LandingPads,
ActionEntry Action = { ValueForTypeID, NextAction, PrevAction };
Actions.push_back(Action);
PrevAction = &Actions.back();
PrevAction = Actions.size() - 1;
}
// Record the first action of the landing pad site.
@ -447,7 +449,7 @@ ComputeActionsTable(const SmallVectorImpl<const LandingPadInfo*> &LandingPads,
// Information used when created the call-site table. The action record
// field of the call site record is the offset of the first associated
// action record, relative to the start of the actions table. This value is
// biased by 1 (1 in dicating the start of the actions table), and 0
// biased by 1 (1 indicating the start of the actions table), and 0
// indicates that there are no actions.
FirstActions.push_back(FirstAction);
@ -648,8 +650,7 @@ void DwarfException::EmitExceptionTable() {
// landing pad site.
SmallVector<ActionEntry, 32> Actions;
SmallVector<unsigned, 64> FirstActions;
unsigned SizeActions = ComputeActionsTable(LandingPads, Actions,
FirstActions);
unsigned SizeActions=ComputeActionsTable(LandingPads, Actions, FirstActions);
// Invokes and nounwind calls have entries in PadMap (due to being bracketed
// by try-range labels when lowered). Ordinary calls do not, so appropriate

2
llvm/lib/CodeGen/AsmPrinter/DwarfException.h
View File

@ -135,7 +135,7 @@ class DwarfException : public DwarfPrinter {
struct ActionEntry {
int ValueForTypeID; // The value to write - may not be equal to the type id.
int NextAction;
struct ActionEntry *Previous;
unsigned Previous;
};
/// CallSiteEntry - Structure describing an entry in the call-site table.