C++ StackProtector::getSSPLayout方法代码示例

本文整理汇总了C++中StackProtector::getSSPLayout方法的典型用法代码示例。如果您正苦于以下问题：C++ StackProtector::getSSPLayout方法的具体用法？C++ StackProtector::getSSPLayout怎么用？C++ StackProtector::getSSPLayout使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类StackProtector的用法示例。

在下文中一共展示了StackProtector::getSSPLayout方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。

示例1: calculateFrameObjectOffsets

/// calculateFrameObjectOffsets - Calculate actual frame offsets for all of the
/// abstract stack objects.
///
void LocalStackSlotPass::calculateFrameObjectOffsets(MachineFunction &Fn) {
  // Loop over all of the stack objects, assigning sequential addresses...
  MachineFrameInfo *MFI = Fn.getFrameInfo();
  const TargetFrameLowering &TFI = *Fn.getTarget().getFrameLowering();
  bool StackGrowsDown =
    TFI.getStackGrowthDirection() == TargetFrameLowering::StackGrowsDown;
  int64_t Offset = 0;
  unsigned MaxAlign = 0;
  StackProtector *SP = &getAnalysis<StackProtector>();

  // Make sure that the stack protector comes before the local variables on the
  // stack.
  SmallSet<int, 16> ProtectedObjs;
  if (MFI->getStackProtectorIndex() >= 0) {
    StackObjSet LargeArrayObjs;
    AdjustStackOffset(MFI, MFI->getStackProtectorIndex(), Offset,
                      StackGrowsDown, MaxAlign);

    // Assign large stack objects first.
    for (unsigned i = 0, e = MFI->getObjectIndexEnd(); i != e; ++i) {
      if (MFI->isDeadObjectIndex(i))
        continue;
      if (MFI->getStackProtectorIndex() == (int)i)
        continue;

      switch (SP->getSSPLayout(MFI->getObjectAllocation(i))) {
      case StackProtector::SSPLK_None:
      case StackProtector::SSPLK_SmallArray:
      case StackProtector::SSPLK_AddrOf:
        continue;
      case StackProtector::SSPLK_LargeArray:
        LargeArrayObjs.insert(i);
        continue;
      }
      llvm_unreachable("Unexpected SSPLayoutKind.");
    }

    AssignProtectedObjSet(LargeArrayObjs, ProtectedObjs, MFI, StackGrowsDown,
                          Offset, MaxAlign);
  }

  // Then assign frame offsets to stack objects that are not used to spill
  // callee saved registers.
  for (unsigned i = 0, e = MFI->getObjectIndexEnd(); i != e; ++i) {
    if (MFI->isDeadObjectIndex(i))
      continue;
    if (MFI->getStackProtectorIndex() == (int)i)
      continue;
    if (ProtectedObjs.count(i))
      continue;

    AdjustStackOffset(MFI, i, Offset, StackGrowsDown, MaxAlign);
  }

  // Remember how big this blob of stack space is
  MFI->setLocalFrameSize(Offset);
  MFI->setLocalFrameMaxAlign(MaxAlign);
}

开发者ID:abrageddon，项目名称:LLVM-LabelAll，代码行数:61，代码来源:LocalStackSlotAllocation.cpp

示例2: calculateFrameObjectOffsets


//.........这里部分代码省略.........
  }

  // Retrieve the Exception Handler registration node.
  int EHRegNodeFrameIndex = INT_MAX;
  if (const WinEHFuncInfo *FuncInfo = Fn.getWinEHFuncInfo())
    EHRegNodeFrameIndex = FuncInfo->EHRegNodeFrameIndex;

  // Make sure that the stack protector comes before the local variables on the
  // stack.
  SmallSet<int, 16> ProtectedObjs;
  if (MFI.getStackProtectorIndex() >= 0) {
    StackObjSet LargeArrayObjs;
    StackObjSet SmallArrayObjs;
    StackObjSet AddrOfObjs;

    AdjustStackOffset(MFI, MFI.getStackProtectorIndex(), StackGrowsDown,
                      Offset, MaxAlign, Skew);

    // Assign large stack objects first.
    for (unsigned i = 0, e = MFI.getObjectIndexEnd(); i != e; ++i) {
      if (MFI.isObjectPreAllocated(i) &&
          MFI.getUseLocalStackAllocationBlock())
        continue;
      if (i >= MinCSFrameIndex && i <= MaxCSFrameIndex)
        continue;
      if (RS && RS->isScavengingFrameIndex((int)i))
        continue;
      if (MFI.isDeadObjectIndex(i))
        continue;
      if (MFI.getStackProtectorIndex() == (int)i ||
          EHRegNodeFrameIndex == (int)i)
        continue;

      switch (SP->getSSPLayout(MFI.getObjectAllocation(i))) {
      case StackProtector::SSPLK_None:
        continue;
      case StackProtector::SSPLK_SmallArray:
        SmallArrayObjs.insert(i);
        continue;
      case StackProtector::SSPLK_AddrOf:
        AddrOfObjs.insert(i);
        continue;
      case StackProtector::SSPLK_LargeArray:
        LargeArrayObjs.insert(i);
        continue;
      }
      llvm_unreachable("Unexpected SSPLayoutKind.");
    }

    AssignProtectedObjSet(LargeArrayObjs, ProtectedObjs, MFI, StackGrowsDown,
                          Offset, MaxAlign, Skew);
    AssignProtectedObjSet(SmallArrayObjs, ProtectedObjs, MFI, StackGrowsDown,
                          Offset, MaxAlign, Skew);
    AssignProtectedObjSet(AddrOfObjs, ProtectedObjs, MFI, StackGrowsDown,
                          Offset, MaxAlign, Skew);
  }

  SmallVector<int, 8> ObjectsToAllocate;

  // Then prepare to assign frame offsets to stack objects that are not used to
  // spill callee saved registers.
  for (unsigned i = 0, e = MFI.getObjectIndexEnd(); i != e; ++i) {
    if (MFI.isObjectPreAllocated(i) && MFI.getUseLocalStackAllocationBlock())
      continue;
    if (i >= MinCSFrameIndex && i <= MaxCSFrameIndex)
      continue;

开发者ID:hfinkel，项目名称:llvm-bgq，代码行数:67，代码来源:PrologEpilogInserter.cpp

示例3: calculateFrameObjectOffsets


//.........这里部分代码省略.........
      MFI->setObjectOffset(Entry.first, FIOffset);
    }
    // Allocate the local block
    Offset += MFI->getLocalFrameSize();

    MaxAlign = std::max(Align, MaxAlign);
  }

  // Make sure that the stack protector comes before the local variables on the
  // stack.
  SmallSet<int, 16> ProtectedObjs;
  if (MFI->getStackProtectorIndex() >= 0) {
    StackObjSet LargeArrayObjs;
    StackObjSet SmallArrayObjs;
    StackObjSet AddrOfObjs;

    AdjustStackOffset(MFI, MFI->getStackProtectorIndex(), StackGrowsDown,
                      Offset, MaxAlign);

    // Assign large stack objects first.
    for (unsigned i = 0, e = MFI->getObjectIndexEnd(); i != e; ++i) {
      if (MFI->isObjectPreAllocated(i) &&
          MFI->getUseLocalStackAllocationBlock())
        continue;
      if (i >= MinCSFrameIndex && i <= MaxCSFrameIndex)
        continue;
      if (RS && RS->isScavengingFrameIndex((int)i))
        continue;
      if (MFI->isDeadObjectIndex(i))
        continue;
      if (MFI->getStackProtectorIndex() == (int)i)
        continue;

      switch (SP->getSSPLayout(MFI->getObjectAllocation(i))) {
      case StackProtector::SSPLK_None:
        continue;
      case StackProtector::SSPLK_SmallArray:
        SmallArrayObjs.insert(i);
        continue;
      case StackProtector::SSPLK_AddrOf:
        AddrOfObjs.insert(i);
        continue;
      case StackProtector::SSPLK_LargeArray:
        LargeArrayObjs.insert(i);
        continue;
      }
      llvm_unreachable("Unexpected SSPLayoutKind.");
    }

    AssignProtectedObjSet(LargeArrayObjs, ProtectedObjs, MFI, StackGrowsDown,
                          Offset, MaxAlign);
    AssignProtectedObjSet(SmallArrayObjs, ProtectedObjs, MFI, StackGrowsDown,
                          Offset, MaxAlign);
    AssignProtectedObjSet(AddrOfObjs, ProtectedObjs, MFI, StackGrowsDown,
                          Offset, MaxAlign);
  }

  // Then assign frame offsets to stack objects that are not used to spill
  // callee saved registers.
  for (unsigned i = 0, e = MFI->getObjectIndexEnd(); i != e; ++i) {
    if (MFI->isObjectPreAllocated(i) &&
        MFI->getUseLocalStackAllocationBlock())
      continue;
    if (i >= MinCSFrameIndex && i <= MaxCSFrameIndex)
      continue;
    if (RS && RS->isScavengingFrameIndex((int)i))

开发者ID:8l，项目名称:SPIRV-LLVM，代码行数:67，代码来源:PrologEpilogInserter.cpp

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