LLVM  6.0.0svn
Public Types | Public Member Functions | Static Public Attributes | List of all members
llvm::StackProtector Class Reference

#include "llvm/CodeGen/StackProtector.h"

Inheritance diagram for llvm::StackProtector:
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Public Types

enum  SSPLayoutKind { SSPLK_None, SSPLK_LargeArray, SSPLK_SmallArray, SSPLK_AddrOf }
 SSPLayoutKind. More...
 
using SSPLayoutMap = ValueMap< const AllocaInst *, SSPLayoutKind >
 A mapping of AllocaInsts to their required SSP layout. More...
 

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. More...
 
SSPLayoutKind getSSPLayout (const AllocaInst *AI) const
 
bool shouldEmitSDCheck (const BasicBlock &BB) const
 
void adjustForColoring (const AllocaInst *From, const AllocaInst *To)
 
bool runOnFunction (Function &Fn) override
 runOnFunction - Virtual method overriden by subclasses to do the per-function processing of the pass. More...
 
- Public Member Functions inherited from llvm::FunctionPass
 FunctionPass (char &pid)
 
PasscreatePrinterPass (raw_ostream &OS, const std::string &Banner) const override
 createPrinterPass - Get a function printer pass. More...
 
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. More...
 
PassManagerType getPotentialPassManagerType () const override
 Return what kind of Pass Manager can manage this pass. More...
 
- Public Member Functions inherited from llvm::Pass
 Pass (PassKind K, char &pid)
 
 Pass (const Pass &)=delete
 
Passoperator= (const Pass &)=delete
 
virtual ~Pass ()
 
PassKind getPassKind () const
 
virtual StringRef getPassName () const
 getPassName - Return a nice clean name for a pass. More...
 
AnalysisID getPassID () const
 getPassID - Return the PassID number that corresponds to this pass. More...
 
virtual bool doInitialization (Module &)
 doInitialization - Virtual method overridden by subclasses to do any necessary initialization before any pass is run. More...
 
virtual bool doFinalization (Module &)
 doFinalization - Virtual method overriden by subclasses to do any necessary clean up after all passes have run. More...
 
virtual void print (raw_ostream &OS, const Module *M) const
 print - Print out the internal state of the pass. More...
 
void dump () const
 
virtual void preparePassManager (PMStack &)
 Check if available pass managers are suitable for this pass or not. More...
 
void setResolver (AnalysisResolver *AR)
 
AnalysisResolvergetResolver () const
 
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. More...
 
virtual void * getAdjustedAnalysisPointer (AnalysisID ID)
 getAdjustedAnalysisPointer - This method is used when a pass implements an analysis interface through multiple inheritance. More...
 
virtual ImmutablePassgetAsImmutablePass ()
 
virtual PMDataManagergetAsPMDataManager ()
 
virtual void verifyAnalysis () const
 verifyAnalysis() - This member can be implemented by a analysis pass to check state of analysis information. More...
 
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. More...
 
bool mustPreserveAnalysisID (char &AID) const
 mustPreserveAnalysisID - This method serves the same function as getAnalysisIfAvailable, but works if you just have an AnalysisID. More...
 
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. More...
 
template<typename AnalysisType >
AnalysisType & getAnalysis (Function &F)
 getAnalysis<AnalysisType>() - This function is used by subclasses to get to the analysis information that they claim to use by overriding the getAnalysisUsage function. More...
 
template<typename AnalysisType >
AnalysisType & getAnalysisID (AnalysisID PI) const
 
template<typename AnalysisType >
AnalysisType & getAnalysisID (AnalysisID PI, Function &F)
 

Static Public Attributes

static char ID = 0
 

Additional Inherited Members

- Static Public Member Functions inherited from llvm::Pass
static const PassInfolookupPassInfo (const void *TI)
 
static const PassInfolookupPassInfo (StringRef Arg)
 
static PasscreatePass (AnalysisID ID)
 
- Protected Member Functions inherited from llvm::FunctionPass
bool skipFunction (const Function &F) const
 Optional passes call this function to check whether the pass should be skipped. More...
 

Detailed Description

Definition at line 37 of file StackProtector.h.

Member Typedef Documentation

◆ SSPLayoutMap

A mapping of AllocaInsts to their required SSP layout.

Definition at line 53 of file StackProtector.h.

Member Enumeration Documentation

◆ SSPLayoutKind

SSPLayoutKind.

Stack Smashing Protection (SSP) rules require that vulnerable stack allocations are located close the stack protector.

Enumerator
SSPLK_None 

Did not trigger a stack protector.

No effect on data layout.

SSPLK_LargeArray 

Array or nested array >= SSP-buffer-size.

Closest to the stack protector.

SSPLK_SmallArray 

Array or nested array < SSP-buffer-size.

2nd closest to the stack protector.

SSPLK_AddrOf 

The address of this allocation is exposed and triggered protection.

3rd closest to the protector.

Definition at line 41 of file StackProtector.h.

Constructor & Destructor Documentation

◆ StackProtector()

llvm::StackProtector::StackProtector ( )
inline

Member Function Documentation

◆ adjustForColoring()

void StackProtector::adjustForColoring ( const AllocaInst From,
const AllocaInst To 
)

◆ getAnalysisUsage()

void StackProtector::getAnalysisUsage ( AnalysisUsage ) const
overridevirtual

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 98 of file StackProtector.cpp.

References llvm::AnalysisUsage::addPreserved(), and llvm::AnalysisUsage::addRequired().

Referenced by StackProtector().

◆ getSSPLayout()

StackProtector::SSPLayoutKind StackProtector::getSSPLayout ( const AllocaInst AI) const

◆ runOnFunction()

bool StackProtector::runOnFunction ( Function F)
overridevirtual

◆ shouldEmitSDCheck()

bool StackProtector::shouldEmitSDCheck ( const BasicBlock BB) const

Definition at line 519 of file StackProtector.cpp.

References llvm::dyn_cast(), and llvm::BasicBlock::getTerminator().

Referenced by StackProtector().

Member Data Documentation

◆ ID

char StackProtector::ID = 0
static

Definition at line 118 of file StackProtector.h.


The documentation for this class was generated from the following files: