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Emit eh filter info.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@34805 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Laskey 2007-03-01 20:26:43 +00:00
parent 59e8434a85
commit 0102ca8f5a
1 changed files with 66 additions and 18 deletions
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84
lib/CodeGen/DwarfWriter.cpp
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@ -2860,6 +2860,11 @@ private:
// Gather first action index for each landing pad site.
SmallVector<unsigned, 8> Actions;
// FIXME - Assume there is only one filter typeinfo list per function
// time being. I.E., Each call to eh_filter will have the same list.
// This can change if a function is inlined.
const LandingPadInfo *Filter = 0;
// Compute sizes for exception table.
unsigned SizeHeader = sizeof(int8_t) + // LPStart format
@ -2874,21 +2879,37 @@ private:
// landing pad site info and the size of the landing pad's actions.
for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) {
const LandingPadInfo &LandingPad = LandingPads[i];
bool IsFilter = LandingPad.IsFilter;
unsigned SizeSiteActions = 0;
const std::vector<unsigned> &TypeIds = LandingPad.TypeIds;
unsigned SizeAction = 0;
signed FirstAction;
// Gather the action sizes
for (unsigned j = 0, M = TypeIds.size(); j != M; ++j) {
unsigned TypeID = TypeIds[i];
unsigned SizeTypeID = Asm->SizeULEB128(TypeID);
signed Action = j ? -(SizeAction + SizeTypeID) : 0;
SizeAction = SizeTypeID + Asm->SizeSLEB128(Action);
if (IsFilter) {
// FIXME - Assume there is only one filter typeinfo list per function
// time being. I.E., Each call to eh_filter will have the same list.
// This can change if a function is inlined.
Filter = &LandingPad;
SizeAction = Asm->SizeSLEB128(-1) + Asm->SizeSLEB128(0);
SizeSiteActions += SizeAction;
// Record the first action of the landing pad site.
FirstAction = SizeActions + SizeSiteActions - SizeAction + 1;
} else if (TypeIds.empty()) {
FirstAction = 0;
} else {
// Gather the action sizes
for (unsigned j = 0, M = TypeIds.size(); j != M; ++j) {
unsigned TypeID = TypeIds[i];
unsigned SizeTypeID = Asm->SizeSLEB128(TypeID);
signed Action = j ? -(SizeAction + SizeTypeID) : 0;
SizeAction = SizeTypeID + Asm->SizeSLEB128(Action);
SizeSiteActions += SizeAction;
}
// Record the first action of the landing pad site.
FirstAction = SizeActions + SizeSiteActions - SizeAction + 1;
}
// Record the first action of the landing pad site.
signed FirstAction = SizeActions + SizeSiteActions - SizeAction + 1;
Actions.push_back(FirstAction);
// Compute this sites contribution to size.
@ -2896,7 +2917,7 @@ private:
SizeSites += sizeof(int32_t) + // Site start.
sizeof(int32_t) + // Site length.
sizeof(int32_t) + // Landing pad.
Asm->SizeULEB128(FirstAction); // Action.
Asm->SizeSLEB128(FirstAction); // Action.
}
// Final tallies.
@ -2938,8 +2959,15 @@ private:
"label", LandingPad.BeginLabel);
Asm->EOL("Region length");
EmitDifference("label", LandingPad.LandingPadLabel,
"eh_func_begin", SubprogramCount);
if (LandingPad.TypeIds.empty()) {
if (TAI->getAddressSize() == sizeof(int32_t))
Asm->EmitInt32(0);
else
Asm->EmitInt64(0);
} else {
EmitDifference("label", LandingPad.LandingPadLabel,
"eh_func_begin", SubprogramCount);
}
Asm->EOL("Landing pad");
Asm->EmitULEB128Bytes(Actions[i]);
@ -2952,15 +2980,22 @@ private:
const std::vector<unsigned> &TypeIds = LandingPad.TypeIds;
unsigned SizeAction = 0;
for (unsigned j = 0, M = TypeIds.size(); j < M; ++j) {
unsigned TypeID = TypeIds[j];
unsigned SizeTypeID = Asm->SizeULEB128(TypeID);
Asm->EmitSLEB128Bytes(TypeID);
if (LandingPad.IsFilter) {
Asm->EmitSLEB128Bytes(-1);
Asm->EOL("TypeInfo index");
signed Action = j ? -(SizeAction + SizeTypeID) : 0;
SizeAction = SizeTypeID + Asm->SizeSLEB128(Action);
Asm->EmitSLEB128Bytes(Action);
Asm->EmitSLEB128Bytes(0);
Asm->EOL("Next action");
} else {
for (unsigned j = 0, M = TypeIds.size(); j < M; ++j) {
unsigned TypeID = TypeIds[j];
unsigned SizeTypeID = Asm->SizeSLEB128(TypeID);
Asm->EmitSLEB128Bytes(TypeID);
Asm->EOL("TypeInfo index");
signed Action = j ? -(SizeAction + SizeTypeID) : 0;
SizeAction = SizeTypeID + Asm->SizeSLEB128(Action);
Asm->EmitSLEB128Bytes(Action);
Asm->EOL("Next action");
}
}
}
@ -2982,6 +3017,19 @@ private:
Asm->EOL("TypeInfo");
}
// Emit the filter typeinfo.
if (Filter) {
const std::vector<unsigned> &TypeIds = Filter->TypeIds;
for (unsigned j = 0, M = TypeIds.size(); j < M; ++j) {
unsigned TypeID = TypeIds[j];
Asm->EmitSLEB128Bytes(TypeID);
Asm->EOL("TypeInfo index");
}
Asm->EmitSLEB128Bytes(0);
Asm->EOL("End of filter typeinfo");
}
Asm->EmitAlignment(2);
}
public: