llvm::StackProtector Class Reference

#include <StackProtector.h>

Inheritance diagram for llvm::StackProtector:

Collaboration diagram for llvm::StackProtector:

List of all members.

Public Types
enum	SSPLayoutKind { SSPLK_None, SSPLK_LargeArray, SSPLK_SmallArray, SSPLK_AddrOf }
typedef ValueMap< const AllocaInst *, SSPLayoutKind >	SSPLayoutMap
	A mapping of AllocaInsts to their required SSP layout.
Public Member Functions
	StackProtector ()
	StackProtector (const TargetMachine *TM)
void	getAnalysisUsage (AnalysisUsage &AU) const override
SSPLayoutKind	getSSPLayout (const AllocaInst *AI) const
void	adjustForColoring (const AllocaInst *From, const AllocaInst *To)
bool	runOnFunction (Function &Fn) override
Static Public Attributes
static char	ID = 0

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Detailed Description

Definition at line 32 of file StackProtector.h.

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Member Typedef Documentation

typedef ValueMap<const AllocaInst *, SSPLayoutKind> llvm::StackProtector::SSPLayoutMap

A mapping of AllocaInsts to their required SSP layout.

Definition at line 48 of file StackProtector.h.

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Member Enumeration Documentation

enum llvm::StackProtector::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 36 of file StackProtector.h.

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Constructor & Destructor Documentation

llvm::StackProtector::StackProtector

(

)

[inline]

Definition at line 108 of file StackProtector.h.

References llvm::PassRegistry::getPassRegistry(), and llvm::initializeStackProtectorPass().

llvm::StackProtector::StackProtector

(

const TargetMachine *

TM

)

[inline]

Definition at line 112 of file StackProtector.h.

References llvm::PassRegistry::getPassRegistry(), and llvm::initializeStackProtectorPass().

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Member Function Documentation

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

Definition at line 62 of file StackProtector.cpp.

References llvm::ValueMap< KeyT, ValueT, Config >::end(), llvm::ValueMap< KeyT, ValueT, Config >::erase(), llvm::ValueMap< KeyT, ValueT, Config >::find(), I, llvm::ValueMap< KeyT, ValueT, Config >::insert(), llvm::ValueMapIterator< DenseMapT, KeyT >::ValueTypeProxy::second, SSPLK_AddrOf, and SSPLK_LargeArray.

void llvm::StackProtector::getAnalysisUsage

(

AnalysisUsage &

)

const [inline, override, virtual]

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 118 of file StackProtector.h.

References llvm::AnalysisUsage::addPreserved().

StackProtector::SSPLayoutKind StackProtector::getSSPLayout

(

const AllocaInst *

AI

)

const

Definition at line 58 of file StackProtector.cpp.

References llvm::ValueMap< KeyT, ValueT, Config >::lookup(), and SSPLK_None.

bool StackProtector::runOnFunction

(

Function &

F

)

[override, virtual]

runOnFunction - Virtual method overriden by subclasses to do the per-function processing of the pass.

Implements llvm::FunctionPass.

Definition at line 83 of file StackProtector.cpp.

References llvm::AttributeSet::FunctionIndex, llvm::StringRef::getAsInteger(), llvm::AttributeSet::getAttribute(), llvm::Function::getAttributes(), llvm::DominatorTreeWrapperPass::getDomTree(), llvm::GlobalValue::getParent(), llvm::TargetMachine::getSubtargetImpl(), llvm::TargetSubtargetInfo::getTargetLowering(), llvm::Attribute::getValueAsString(), and llvm::Attribute::isStringAttribute().

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Member Data Documentation

char StackProtector::ID = 0 [static]

Definition at line 107 of file StackProtector.h.

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

• StackProtector.h
• StackProtector.cpp