crashpad::NoCfiIcall< Functor > Class Template Reference

Disables cfi-icall for calls made through a function pointer. More...

#include "util/misc/no_cfi_icall.h"

Public Member Functions
	NoCfiIcall (Functor function)
	Constructs this object.
	NoCfiIcall ()
template<typename PointerType, typename = std::enable_if_t< std::is_same<typename std::remove_cv<PointerType>::type, void*>::value>>
	NoCfiIcall (PointerType function)
void	SetPointer (Functor function)
	Updates the pointer to the function to be called.
template<typename PointerType, typename = std::enable_if_t< std::is_same<typename std::remove_cv<PointerType>::type, void*>::value>>
void	SetPointer (PointerType function)
template<typename... RunArgs>
decltype(auto)	operator() (RunArgs &&... args) const
	Calls the function without sanitization by cfi-icall.
	operator bool () const
	Returns true if not nullptr.

Detailed Description

template<typename Functor>
class crashpad::NoCfiIcall< Functor >

Disables cfi-icall for calls made through a function pointer.

Clang provides several Control-Flow-Integrity (CFI) sanitizers, among them, cfi-icall, which attempts to verify that the dynamic type of a function matches the static type of the function pointer used to call it.

https://clang.llvm.org/docs/ControlFlowIntegrity.html#indirect-function-call-checking

However, cfi-icall does not have enough information to check indirect calls to functions in other modules, such as through the pointers returned by dlsym(). In these cases, CFI aborts the program upon executing the indirect call.

This class encapsulates cross-DSO function pointers to disable cfi-icall precisely when calling these pointers.

Constructor & Destructor Documentation

NoCfiIcall() [1/3]

template<typename Functor>

crashpad::NoCfiIcall< Functor >::NoCfiIcall ( Functor function )

inlineexplicit

Constructs this object.

Parameters

function

A pointer to the function to be called.

NoCfiIcall() [2/3]

template<typename Functor>

crashpad::NoCfiIcall< Functor >::NoCfiIcall ( )

inline

See also

NoCfiIcall

NoCfiIcall() [3/3]

template<typename Functor>

template<typename PointerType, typename = std::enable_if_t< std::is_same<typename std::remove_cv<PointerType>::type, void*>::value>>

crashpad::NoCfiIcall< Functor >::NoCfiIcall ( PointerType function )

inlineexplicit

See also

NoCfiIcall

Member Function Documentation

SetPointer() [1/2]

template<typename Functor>

void crashpad::NoCfiIcall< Functor >::SetPointer ( Functor function )

inline

Updates the pointer to the function to be called.

Parameters

function

A pointer to the function to be called.

SetPointer() [2/2]

template<typename Functor>

template<typename PointerType, typename = std::enable_if_t< std::is_same<typename std::remove_cv<PointerType>::type, void*>::value>>

void crashpad::NoCfiIcall< Functor >::SetPointer ( PointerType function )

inline

See also

SetPointer

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

• util/misc/no_cfi_icall.h