Remote-mapped RuntimeDyld-compatible memory manager. More...

#include "llvm/ExecutionEngine/Orc/EPCGenericRTDyldMemoryManager.h"

Inheritance diagram for llvm::orc::EPCGenericRTDyldMemoryManager:

Classes
struct	SymbolAddrs
	Symbol addresses for memory access. More...

Public Member Functions
	EPCGenericRTDyldMemoryManager (ExecutorProcessControl &EPC, SymbolAddrs SAs)
	Create an EPCGenericRTDyldMemoryManager using the given EPC and symbol addrs.

	EPCGenericRTDyldMemoryManager (const EPCGenericRTDyldMemoryManager &)=delete

EPCGenericRTDyldMemoryManager &	operator= (const EPCGenericRTDyldMemoryManager &)=delete

	EPCGenericRTDyldMemoryManager (EPCGenericRTDyldMemoryManager &&)=delete

EPCGenericRTDyldMemoryManager &	operator= (EPCGenericRTDyldMemoryManager &&)=delete

	~EPCGenericRTDyldMemoryManager ()

uint8_t *	allocateCodeSection (uintptr_t Size, unsigned Alignment, unsigned SectionID, StringRef SectionName) override
	Allocate a memory block of (at least) the given size suitable for executable code.

uint8_t *	allocateDataSection (uintptr_t Size, unsigned Alignment, unsigned SectionID, StringRef SectionName, bool IsReadOnly) override
	Allocate a memory block of (at least) the given size suitable for data.

void	reserveAllocationSpace (uintptr_t CodeSize, Align CodeAlign, uintptr_t RODataSize, Align RODataAlign, uintptr_t RWDataSize, Align RWDataAlign) override
	Inform the memory manager about the total amount of memory required to allocate all sections to be loaded: `CodeSize` - the total size of all code sections `DataSizeRO` - the total size of all read-only data sections `DataSizeRW` - the total size of all read-write data sections.

bool	needsToReserveAllocationSpace () override
	Override to return true to enable the reserveAllocationSpace callback.

void	registerEHFrames (uint8_t *Addr, uint64_t LoadAddr, size_t Size) override
	Register the EH frames with the runtime so that c++ exceptions work.

void	deregisterEHFrames () override

void	notifyObjectLoaded (RuntimeDyld &Dyld, const object::ObjectFile &Obj) override
	This method is called after an object has been loaded into memory but before relocations are applied to the loaded sections.

bool	finalizeMemory (std::string *ErrMsg=nullptr) override
	This method is called when object loading is complete and section page permissions can be applied.

Public Member Functions inherited from llvm::RuntimeDyld::MemoryManager
	MemoryManager ()=default

virtual	~MemoryManager ()=default

virtual uint8_t *	allocateCodeSection (uintptr_t Size, unsigned Alignment, unsigned SectionID, StringRef SectionName)=0
	Allocate a memory block of (at least) the given size suitable for executable code.

virtual uint8_t *	allocateDataSection (uintptr_t Size, unsigned Alignment, unsigned SectionID, StringRef SectionName, bool IsReadOnly)=0
	Allocate a memory block of (at least) the given size suitable for data.

virtual TLSSection	allocateTLSSection (uintptr_t Size, unsigned Alignment, unsigned SectionID, StringRef SectionName)
	Allocate a memory block of (at least) the given size to be used for thread-local storage (TLS).

virtual void	reserveAllocationSpace (uintptr_t CodeSize, Align CodeAlign, uintptr_t RODataSize, Align RODataAlign, uintptr_t RWDataSize, Align RWDataAlign)
	Inform the memory manager about the total amount of memory required to allocate all sections to be loaded: `CodeSize` - the total size of all code sections `DataSizeRO` - the total size of all read-only data sections `DataSizeRW` - the total size of all read-write data sections.

virtual bool	needsToReserveAllocationSpace ()
	Override to return true to enable the reserveAllocationSpace callback.

virtual bool	allowStubAllocation () const
	Override to return false to tell LLVM no stub space will be needed.

virtual void	registerEHFrames (uint8_t *Addr, uint64_t LoadAddr, size_t Size)=0
	Register the EH frames with the runtime so that c++ exceptions work.

virtual void	deregisterEHFrames ()=0

virtual bool	finalizeMemory (std::string *ErrMsg=nullptr)=0
	This method is called when object loading is complete and section page permissions can be applied.

virtual void	notifyObjectLoaded (RuntimeDyld &RTDyld, const object::ObjectFile &Obj)
	This method is called after an object has been loaded into memory but before relocations are applied to the loaded sections.

Static Public Member Functions
static Expected< std::unique_ptr< EPCGenericRTDyldMemoryManager > >	CreateWithDefaultBootstrapSymbols (ExecutorProcessControl &EPC)
	Create an EPCGenericRTDyldMemoryManager using the given EPC, looking up the default symbol names in the bootstrap symbol set.

Detailed Description

Remote-mapped RuntimeDyld-compatible memory manager.

Definition at line 26 of file EPCGenericRTDyldMemoryManager.h.

Constructor & Destructor Documentation

◆ EPCGenericRTDyldMemoryManager() [1/3]

llvm::orc::EPCGenericRTDyldMemoryManager::EPCGenericRTDyldMemoryManager	(	ExecutorProcessControl &	EPC,
		SymbolAddrs	SAs
	)

Create an EPCGenericRTDyldMemoryManager using the given EPC and symbol addrs.

Definition at line 38 of file EPCGenericRTDyldMemoryManager.cpp.

References llvm::dbgs(), and LLVM_DEBUG.

◆ EPCGenericRTDyldMemoryManager() [2/3]

llvm::orc::EPCGenericRTDyldMemoryManager::EPCGenericRTDyldMemoryManager ( const EPCGenericRTDyldMemoryManager & )

delete

◆ EPCGenericRTDyldMemoryManager() [3/3]

llvm::orc::EPCGenericRTDyldMemoryManager::EPCGenericRTDyldMemoryManager ( EPCGenericRTDyldMemoryManager && )

delete

◆ ~EPCGenericRTDyldMemoryManager()

llvm::orc::EPCGenericRTDyldMemoryManager::~EPCGenericRTDyldMemoryManager ( )

Definition at line 44 of file EPCGenericRTDyldMemoryManager.cpp.

References llvm::orc::ExecutorProcessControl::callSPSWrapper(), llvm::dbgs(), llvm::errs(), llvm::orc::EPCGenericRTDyldMemoryManager::SymbolAddrs::Instance, LLVM_DEBUG, llvm::logAllUnhandledErrors(), llvm::orc::EPCGenericRTDyldMemoryManager::SymbolAddrs::Reserve, and llvm::Error::success().

Member Function Documentation

◆ allocateCodeSection()

uint8_t * llvm::orc::EPCGenericRTDyldMemoryManager::allocateCodeSection	(	uintptr_t	Size,
		unsigned	Alignment,
		unsigned	SectionID,
		StringRef	SectionName
	)

overridevirtual

Allocate a memory block of (at least) the given size suitable for executable code.

The SectionID is a unique identifier assigned by the RuntimeDyld instance, and optionally recorded by the memory manager to access a loaded section.

Implements llvm::RuntimeDyld::MemoryManager.

Definition at line 62 of file EPCGenericRTDyldMemoryManager.cpp.

References llvm::alignAddr(), llvm::dbgs(), llvm::formatv(), LLVM_DEBUG, and Size.

◆ allocateDataSection()

uint8_t * llvm::orc::EPCGenericRTDyldMemoryManager::allocateDataSection	(	uintptr_t	Size,
		unsigned	Alignment,
		unsigned	SectionID,
		StringRef	SectionName,
		bool	IsReadOnly
	)

overridevirtual

Allocate a memory block of (at least) the given size suitable for data.

The SectionID is a unique identifier assigned by the JIT engine, and optionally recorded by the memory manager to access a loaded section.

Implements llvm::RuntimeDyld::MemoryManager.

Definition at line 77 of file EPCGenericRTDyldMemoryManager.cpp.

References llvm::alignAddr(), llvm::dbgs(), llvm::formatv(), LLVM_DEBUG, and Size.

◆ CreateWithDefaultBootstrapSymbols()

Expected< std::unique_ptr< EPCGenericRTDyldMemoryManager > > llvm::orc::EPCGenericRTDyldMemoryManager::CreateWithDefaultBootstrapSymbols ( ExecutorProcessControl & EPC )

static

Create an EPCGenericRTDyldMemoryManager using the given EPC, looking up the default symbol names in the bootstrap symbol set.

Definition at line 23 of file EPCGenericRTDyldMemoryManager.cpp.

References llvm::orc::ExecutorProcessControl::getBootstrapSymbols().

◆ deregisterEHFrames()

void llvm::orc::EPCGenericRTDyldMemoryManager::deregisterEHFrames ( )

overridevirtual

Implements llvm::RuntimeDyld::MemoryManager.

Definition at line 184 of file EPCGenericRTDyldMemoryManager.cpp.

◆ finalizeMemory()

bool llvm::orc::EPCGenericRTDyldMemoryManager::finalizeMemory ( std::string * ErrMsg = nullptr )

overridevirtual

This method is called when object loading is complete and section page permissions can be applied.

It is up to the memory manager implementation to decide whether or not to act on this method. The memory manager will typically allocate all sections as read-write and then apply specific permissions when this method is called. Code sections cannot be executed until this function has been called. In addition, any cache coherency operations needed to reliably use the memory are also performed.

Returns true if an error occurred, false otherwise.

Implements llvm::RuntimeDyld::MemoryManager.

Definition at line 204 of file EPCGenericRTDyldMemoryManager.cpp.

References llvm::orc::tpctypes::FinalizeRequest::Actions, llvm::alignAddr(), llvm::alignTo(), llvm::orc::ExecutorProcessControl::callSPSWrapper(), llvm::cantFail(), llvm::orc::shared::WrapperFunctionCall::Create(), llvm::dbgs(), llvm::orc::EPCGenericRTDyldMemoryManager::SymbolAddrs::DeregisterEHFrame, llvm::orc::Exec, llvm::orc::EPCGenericRTDyldMemoryManager::SymbolAddrs::Finalize, I, llvm::orc::EPCGenericRTDyldMemoryManager::SymbolAddrs::Instance, LLVM_DEBUG, llvm::orc::Read, llvm::orc::EPCGenericRTDyldMemoryManager::SymbolAddrs::RegisterEHFrame, llvm::orc::tpctypes::FinalizeRequest::Segments, llvm::orc::ExecutorAddrRange::Start, llvm::Error::success(), std::swap(), llvm::dwarf::toString(), and llvm::orc::Write.

◆ needsToReserveAllocationSpace()

bool llvm::orc::EPCGenericRTDyldMemoryManager::needsToReserveAllocationSpace ( )

overridevirtual

Override to return true to enable the reserveAllocationSpace callback.

Reimplemented from llvm::RuntimeDyld::MemoryManager.

Definition at line 156 of file EPCGenericRTDyldMemoryManager.cpp.

◆ notifyObjectLoaded()

void llvm::orc::EPCGenericRTDyldMemoryManager::notifyObjectLoaded	(	RuntimeDyld &	RTDyld,
		const object::ObjectFile &	Obj
	)

overridevirtual

This method is called after an object has been loaded into memory but before relocations are applied to the loaded sections.

Memory managers which are preparing code for execution in an external address space can use this call to remap the section addresses for the newly loaded object.

For clients that do not need access to an ExecutionEngine instance this method should be preferred to its cousin MCJITMemoryManager::notifyObjectLoaded as this method is compatible with ORC JIT stacks.

Reimplemented from llvm::RuntimeDyld::MemoryManager.

Definition at line 188 of file EPCGenericRTDyldMemoryManager.cpp.

References llvm::dbgs(), and LLVM_DEBUG.

◆ operator=() [1/2]

EPCGenericRTDyldMemoryManager & llvm::orc::EPCGenericRTDyldMemoryManager::operator= ( const EPCGenericRTDyldMemoryManager & )

delete

◆ operator=() [2/2]

EPCGenericRTDyldMemoryManager & llvm::orc::EPCGenericRTDyldMemoryManager::operator= ( EPCGenericRTDyldMemoryManager && )

delete

◆ registerEHFrames()

void llvm::orc::EPCGenericRTDyldMemoryManager::registerEHFrames	(	uint8_t *	Addr,
		uint64_t	LoadAddr,
		size_t	Size
	)

overridevirtual

Register the EH frames with the runtime so that c++ exceptions work.

Addr parameter provides the local address of the EH frame section data, while LoadAddr provides the address of the data in the target address space. If the section has not been remapped (which will usually be the case for local execution) these two values will be the same.

Implements llvm::RuntimeDyld::MemoryManager.

Definition at line 160 of file EPCGenericRTDyldMemoryManager.cpp.

References llvm::dbgs(), llvm::formatv(), LLVM_DEBUG, llvm::reverse(), and Size.

◆ reserveAllocationSpace()

void llvm::orc::EPCGenericRTDyldMemoryManager::reserveAllocationSpace	(	uintptr_t	CodeSize,
		Align	CodeAlign,
		uintptr_t	RODataSize,
		Align	RODataAlign,
		uintptr_t	RWDataSize,
		Align	RWDataAlign
	)

overridevirtual

Inform the memory manager about the total amount of memory required to allocate all sections to be loaded: CodeSize - the total size of all code sections DataSizeRO - the total size of all read-only data sections DataSizeRW - the total size of all read-write data sections.

Note that by default the callback is disabled. To enable it redefine the method needsToReserveAllocationSpace to return true.

Reimplemented from llvm::RuntimeDyld::MemoryManager.

Definition at line 96 of file EPCGenericRTDyldMemoryManager.cpp.

References llvm::alignTo(), llvm::orc::ExecutorProcessControl::callSPSWrapper(), llvm::dbgs(), llvm::formatv(), llvm::orc::ExecutorProcessControl::getPageSize(), llvm::orc::EPCGenericRTDyldMemoryManager::SymbolAddrs::Instance, LLVM_DEBUG, llvm::orc::EPCGenericRTDyldMemoryManager::SymbolAddrs::Reserve, and llvm::dwarf::toString().

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

include/llvm/ExecutionEngine/Orc/EPCGenericRTDyldMemoryManager.h
lib/ExecutionEngine/Orc/EPCGenericRTDyldMemoryManager.cpp

Classes

Public Member Functions

Static Public Member Functions

Detailed Description

Constructor & Destructor Documentation

◆ EPCGenericRTDyldMemoryManager() [1/3]

◆ EPCGenericRTDyldMemoryManager() [2/3]

◆ EPCGenericRTDyldMemoryManager() [3/3]

◆ ~EPCGenericRTDyldMemoryManager()

Member Function Documentation

◆ allocateCodeSection()

◆ allocateDataSection()

◆ CreateWithDefaultBootstrapSymbols()

◆ deregisterEHFrames()

◆ finalizeMemory()

◆ needsToReserveAllocationSpace()

◆ notifyObjectLoaded()

◆ operator=() [1/2]

◆ operator=() [2/2]

◆ registerEHFrames()

◆ reserveAllocationSpace()