LLVM 18.0.0git
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#include "llvm/CodeGen/StackProtector.h"
Public Member Functions | |
StackProtector () | |
void | getAnalysisUsage (AnalysisUsage &AU) const override |
getAnalysisUsage - This function should be overriden by passes that need analysis information to do their job. | |
bool | shouldEmitSDCheck (const BasicBlock &BB) const |
bool | runOnFunction (Function &Fn) override |
runOnFunction - Virtual method overriden by subclasses to do the per-function processing of the pass. | |
void | copyToMachineFrameInfo (MachineFrameInfo &MFI) const |
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FunctionPass (char &pid) | |
Pass * | createPrinterPass (raw_ostream &OS, const std::string &Banner) const override |
createPrinterPass - Get a function printer pass. | |
virtual bool | runOnFunction (Function &F)=0 |
runOnFunction - Virtual method overriden by subclasses to do the per-function processing of the pass. | |
void | assignPassManager (PMStack &PMS, PassManagerType T) override |
Find appropriate Function Pass Manager or Call Graph Pass Manager in the PM Stack and add self into that manager. | |
PassManagerType | getPotentialPassManagerType () const override |
Return what kind of Pass Manager can manage this pass. | |
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Pass (PassKind K, char &pid) | |
Pass (const Pass &)=delete | |
Pass & | operator= (const Pass &)=delete |
virtual | ~Pass () |
PassKind | getPassKind () const |
virtual StringRef | getPassName () const |
getPassName - Return a nice clean name for a pass. | |
AnalysisID | getPassID () const |
getPassID - Return the PassID number that corresponds to this pass. | |
virtual bool | doInitialization (Module &) |
doInitialization - Virtual method overridden by subclasses to do any necessary initialization before any pass is run. | |
virtual bool | doFinalization (Module &) |
doFinalization - Virtual method overriden by subclasses to do any necessary clean up after all passes have run. | |
virtual void | print (raw_ostream &OS, const Module *M) const |
print - Print out the internal state of the pass. | |
void | dump () const |
virtual Pass * | createPrinterPass (raw_ostream &OS, const std::string &Banner) const =0 |
createPrinterPass - Get a Pass appropriate to print the IR this pass operates on (Module, Function or MachineFunction). | |
virtual void | assignPassManager (PMStack &, PassManagerType) |
Each pass is responsible for assigning a pass manager to itself. | |
virtual void | preparePassManager (PMStack &) |
Check if available pass managers are suitable for this pass or not. | |
virtual PassManagerType | getPotentialPassManagerType () const |
Return what kind of Pass Manager can manage this pass. | |
void | setResolver (AnalysisResolver *AR) |
AnalysisResolver * | getResolver () const |
virtual void | getAnalysisUsage (AnalysisUsage &) const |
getAnalysisUsage - This function should be overriden by passes that need analysis information to do their job. | |
virtual void | releaseMemory () |
releaseMemory() - This member can be implemented by a pass if it wants to be able to release its memory when it is no longer needed. | |
virtual void * | getAdjustedAnalysisPointer (AnalysisID ID) |
getAdjustedAnalysisPointer - This method is used when a pass implements an analysis interface through multiple inheritance. | |
virtual ImmutablePass * | getAsImmutablePass () |
virtual PMDataManager * | getAsPMDataManager () |
virtual void | verifyAnalysis () const |
verifyAnalysis() - This member can be implemented by a analysis pass to check state of analysis information. | |
virtual void | dumpPassStructure (unsigned Offset=0) |
template<typename AnalysisType > | |
AnalysisType * | getAnalysisIfAvailable () const |
getAnalysisIfAvailable<AnalysisType>() - Subclasses use this function to get analysis information that might be around, for example to update it. | |
bool | mustPreserveAnalysisID (char &AID) const |
mustPreserveAnalysisID - This method serves the same function as getAnalysisIfAvailable, but works if you just have an AnalysisID. | |
template<typename AnalysisType > | |
AnalysisType & | getAnalysis () const |
getAnalysis<AnalysisType>() - This function is used by subclasses to get to the analysis information that they claim to use by overriding the getAnalysisUsage function. | |
template<typename AnalysisType > | |
AnalysisType & | getAnalysis (Function &F, bool *Changed=nullptr) |
getAnalysis<AnalysisType>() - This function is used by subclasses to get to the analysis information that they claim to use by overriding the getAnalysisUsage function. | |
template<typename AnalysisType > | |
AnalysisType & | getAnalysisID (AnalysisID PI) const |
template<typename AnalysisType > | |
AnalysisType & | getAnalysisID (AnalysisID PI, Function &F, bool *Changed=nullptr) |
Static Public Member Functions | |
static bool | requiresStackProtector (Function *F, SSPLayoutMap *Layout=nullptr) |
Check whether or not F needs a stack protector based upon the stack protector level. | |
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static const PassInfo * | lookupPassInfo (const void *TI) |
static const PassInfo * | lookupPassInfo (StringRef Arg) |
static Pass * | createPass (AnalysisID ID) |
Static Public Attributes | |
static char | ID = 0 |
Additional Inherited Members | |
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bool | skipFunction (const Function &F) const |
Optional passes call this function to check whether the pass should be skipped. | |
Definition at line 34 of file StackProtector.h.
StackProtector::StackProtector | ( | ) |
Definition at line 69 of file StackProtector.cpp.
References llvm::PassRegistry::getPassRegistry(), and llvm::initializeStackProtectorPass().
void StackProtector::copyToMachineFrameInfo | ( | MachineFrameInfo & | MFI | ) | const |
Definition at line 642 of file StackProtector.cpp.
References E, llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::empty(), llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::end(), llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::find(), llvm::MachineFrameInfo::getObjectAllocation(), llvm::MachineFrameInfo::getObjectIndexEnd(), I, llvm::MachineFrameInfo::isDeadObjectIndex(), and llvm::MachineFrameInfo::setObjectSSPLayout().
Referenced by llvm::IRTranslator::runOnMachineFunction().
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getAnalysisUsage - This function should be overriden by passes that need analysis information to do their job.
If a pass specifies that it uses a particular analysis result to this function, it can then use the getAnalysis<AnalysisType>() function, below.
Reimplemented from llvm::Pass.
Definition at line 82 of file StackProtector.cpp.
References llvm::AnalysisUsage::addPreserved(), and llvm::AnalysisUsage::addRequired().
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Check whether or not F
needs a stack protector based upon the stack protector level.
Check whether or not this function needs a stack protector based upon the stack protector level.
We use two heuristics: a standard (ssp) and strong (sspstrong). The standard heuristic which will add a guard variable to functions that call alloca with a either a variable size or a size >= SSPBufferSize, functions with character buffers larger than SSPBufferSize, and functions with aggregates containing character buffers larger than SSPBufferSize. The strong heuristic will add a guard variables to functions that call alloca regardless of size, functions with any buffer regardless of type and size, functions with aggregates that contain any buffer regardless of type and size, and functions that contain stack-based variables that have had their address taken.
Definition at line 288 of file StackProtector.cpp.
References llvm::SmallPtrSetImplBase::clear(), ContainsProtectableArray(), DEBUG_TYPE, llvm::OptimizationRemarkEmitter::emit(), F, HasAddressTaken(), I, llvm::DenseMapBase< DerivedT, KeyT, ValueT, KeyInfoT, BucketT >::insert(), llvm::MachineFrameInfo::SSPLK_AddrOf, llvm::MachineFrameInfo::SSPLK_LargeArray, and llvm::MachineFrameInfo::SSPLK_SmallArray.
Referenced by runOnFunction().
runOnFunction - Virtual method overriden by subclasses to do the per-function processing of the pass.
Implements llvm::FunctionPass.
Definition at line 87 of file StackProtector.cpp.
References assert(), llvm::classifyEHPersonality(), llvm::Function::getFnAttributeAsParsedInteger(), llvm::GlobalValue::getParent(), llvm::Function::getPersonalityFn(), llvm::TargetMachine::getSubtargetImpl(), llvm::TargetSubtargetInfo::getTargetLowering(), llvm::TargetMachine::getTargetTriple(), llvm::Function::hasPersonalityFn(), llvm::isFuncletEHPersonality(), llvm::DomTreeUpdater::Lazy, and requiresStackProtector().
bool StackProtector::shouldEmitSDCheck | ( | const BasicBlock & | BB | ) | const |
Definition at line 638 of file StackProtector.cpp.
References llvm::BasicBlock::getTerminator().
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static |
Definition at line 82 of file StackProtector.h.