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Output exception call-sites in address order, as required by the unwinding

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runtime.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@37104 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan Sands 2007-05-16 12:12:23 +00:00
parent aeafca0a25
commit 53c3a333a4
1 changed files with 54 additions and 10 deletions
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64
lib/CodeGen/DwarfWriter.cpp
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@ -13,6 +13,7 @@
#include "llvm/CodeGen/DwarfWriter.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/FoldingSet.h"
#include "llvm/ADT/StringExtras.h"
#include "llvm/ADT/UniqueVector.h"
@ -31,6 +32,7 @@
#include "llvm/Target/MRegisterInfo.h"
#include "llvm/Target/TargetData.h"
#include "llvm/Target/TargetFrameInfo.h"
#include "llvm/Target/TargetInstrInfo.h"
#include "llvm/Target/TargetMachine.h"
#include "llvm/Target/TargetOptions.h"
#include <ostream>
@ -2911,6 +2913,21 @@ private:
/// found the the frame is unwound and handling continues.
/// 3. Type id table contains references to all the C++ typeinfo for all
/// catches in the function. This tables is reversed indexed base 1.
struct KeyInfo {
static inline unsigned getEmptyKey() { return -1U; }
static inline unsigned getTombstoneKey() { return -2U; }
static unsigned getHashValue(const unsigned &Key) { return Key; }
static bool isPod() { return true; }
};
struct PadSite {
unsigned PadIndex;
unsigned SiteIndex;
};
typedef DenseMap<unsigned, PadSite, KeyInfo> PadMapType;
void EmitExceptionTable() {
// Map all labels and get rid of any dead landing pads.
MMI->TidyLandingPads();
@ -3013,20 +3030,47 @@ private:
Asm->EOL("Call site format (DW_EH_PE_udata4)");
Asm->EmitULEB128Bytes(SizeSites);
Asm->EOL("Call-site table length");
// Emit the landing pad site information.
// Emit the landing pad site information in order of address.
PadMapType PadMap;
for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) {
const LandingPadInfo &LandingPad = LandingPads[i];
for (unsigned j=0, E = LandingPad.BeginLabels.size(); j != E; ++j) {
EmitSectionOffset("label", "eh_func_begin",
LandingPad.BeginLabels[j], SubprogramCount,
unsigned BeginLabel = LandingPad.BeginLabels[j];
assert(!PadMap.count(BeginLabel) && "duplicate landing pad labels!");
PadSite P = { i, j };
PadMap[BeginLabel] = P;
}
}
for (MachineFunction::const_iterator I = MF->begin(), E = MF->end();
I != E; ++I) {
for (MachineBasicBlock::const_iterator MI = I->begin(), E = I->end();
MI != E; ++MI) {
if (MI->getOpcode() != TargetInstrInfo::LABEL)
continue;
unsigned BeginLabel = MI->getOperand(0).getImmedValue();
PadMapType::iterator L = PadMap.find(BeginLabel);
if (L == PadMap.end())
continue;
PadSite P = L->second;
const LandingPadInfo &LandingPad = LandingPads[P.PadIndex];
assert(BeginLabel == LandingPad.BeginLabels[P.SiteIndex] &&
"Inconsistent landing pad map!");
EmitSectionOffset("label", "eh_func_begin", BeginLabel, SubprogramCount,
false, true);
Asm->EOL("Region start");
EmitDifference("label", LandingPad.EndLabels[j],
"label", LandingPad.BeginLabels[j]);
EmitDifference("label", LandingPad.EndLabels[P.SiteIndex],
"label", BeginLabel);
Asm->EOL("Region length");
if (LandingPad.TypeIds.empty()) {
if (TAI->getAddressSize() == sizeof(int32_t))
Asm->EmitInt32(0);
@ -3038,11 +3082,11 @@ private:
}
Asm->EOL("Landing pad");
Asm->EmitULEB128Bytes(Actions[i]);
Asm->EmitULEB128Bytes(Actions[P.PadIndex]);
Asm->EOL("Action");
}
}
// Emit the actions.
for (unsigned i = 0, N = LandingPads.size(); i != N; ++i) {
const LandingPadInfo &LandingPad = LandingPads[i];