cacao::Patcher Class Reference

Patcher super class. More...

Inheritance diagram for cacao::Patcher:

Public Member Functions
	Patcher ()
virtual	~Patcher ()
bool	patch ()
	This a wrapper to set the done flag. More...
virtual uintptr_t	get_mpc () const =0
	get the absolute position in code segment More...
virtual void	emit ()=0
	Generates the code for the patcher traps. More...
virtual void	reposition (intptr_t base)=0
	reposition to another base More...
bool	is_patched () const
	Check already patched. More...
virtual bool	check_is_patched () const =0
	Check if the patcher is already patched. More...
virtual const char *	get_name () const
	print patcher information More...
virtual OStream &	print (OStream &OS) const
	print patcher information More...

Private Member Functions
virtual bool	patch_impl ()=0
	This function performs the patching. More...

Private Attributes
bool	done

Detailed Description

Patcher super class.

This class is intended to replace the patchref_t patcher references. The goal is to replace function pointers by virtual functions and void pointers by member variables. Although we need a vtbl_ptr for virtual functions and a smart pointer for list storage this might even reduce the overall memory consumption because not all fields of patchref_t are needed by all patchers. But the main focus is on encapsulation and usability.

Todo:

Remove/adopt the text above if the legacy patchref_t framework has been removed.

Definition at line 49 of file PatcherNew.hpp.

Constructor & Destructor Documentation

cacao::Patcher::Patcher

(

)

Definition at line 37 of file PatcherNew.cpp.

cacao::Patcher::~Patcher ( )

virtual

Definition at line 41 of file PatcherNew.cpp.

Member Function Documentation

virtual bool cacao::Patcher::check_is_patched ( ) const

pure virtual

Check if the patcher is already patched.

This is done by comparing the machine instruction.

Returns

true if patched, false otherwise.

See Also

is_patched

Implemented in cacao::InitializeClassPatcher, and cacao::LegacyPatcher.

virtual void cacao::Patcher::emit ( )

pure virtual

Generates the code for the patcher traps.

Implemented in cacao::InitializeClassPatcher, and cacao::LegacyPatcher.

virtual uintptr_t cacao::Patcher::get_mpc ( ) const

pure virtual

get the absolute position in code segment

Deprecated:

Implemented in cacao::PatcherBase, and cacao::LegacyPatcher.

const char * cacao::Patcher::get_name ( ) const

virtual

print patcher information

Reimplemented in cacao::InitializeClassPatcher, cacao::PatcherBase, and cacao::LegacyPatcher.

Definition at line 45 of file PatcherNew.cpp.

bool cacao::Patcher::is_patched ( ) const

inline

Check already patched.

In contrast to check_is_patched this method simply queries a boolean variable whereas check_is_patched inspects to machine code.

See Also

check_is_patched

Definition at line 93 of file PatcherNew.hpp.

bool cacao::Patcher::patch ( )

inline

This a wrapper to set the done flag.

Definition at line 63 of file PatcherNew.hpp.

virtual bool cacao::Patcher::patch_impl ( )

privatepure virtual

This function performs the patching.

Implemented in cacao::InitializeClassPatcher, and cacao::LegacyPatcher.

OStream & cacao::Patcher::print ( OStream &  OS ) const

virtual

print patcher information

Reimplemented in cacao::LegacyPatcher.

Definition at line 49 of file PatcherNew.cpp.

virtual void cacao::Patcher::reposition ( intptr_t  base )

pure virtual

reposition to another base

Implemented in cacao::PatcherBase, and cacao::LegacyPatcher.

Field Documentation

bool cacao::Patcher::done

private

Definition at line 51 of file PatcherNew.hpp.

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

• /home/bbc/buildbot/slave/doxygen-compiler2/source/cacao/src/vm/jit/PatcherNew.hpp
• /home/bbc/buildbot/slave/doxygen-compiler2/source/cacao/src/vm/jit/PatcherNew.cpp