LLVM  6.0.0svn
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llvm::RTDyldMemoryManager Class Reference

#include "llvm/ExecutionEngine/RTDyldMemoryManager.h"

Inheritance diagram for llvm::RTDyldMemoryManager:
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Collaboration diagram for llvm::RTDyldMemoryManager:
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Classes

struct  EHFrame
 

Public Member Functions

 RTDyldMemoryManager ()=default
 
 RTDyldMemoryManager (const RTDyldMemoryManager &)=delete
 
void operator= (const RTDyldMemoryManager &)=delete
 
 ~RTDyldMemoryManager () override
 
void registerEHFrames (uint8_t *Addr, uint64_t LoadAddr, size_t Size) override
 Register the EH frames with the runtime so that c++ exceptions work. More...
 
void deregisterEHFrames () override
 
virtual uint64_t getSymbolAddress (const std::string &Name)
 Legacy symbol lookup - DEPRECATED! Please override findSymbol instead. More...
 
JITSymbol findSymbol (const std::string &Name) override
 This method returns a RuntimeDyld::SymbolInfo for the specified function or variable. More...
 
virtual uint64_t getSymbolAddressInLogicalDylib (const std::string &Name)
 Legacy symbol lookup – DEPRECATED! Please override findSymbolInLogicalDylib instead. More...
 
JITSymbol findSymbolInLogicalDylib (const std::string &Name) override
 Default to treating all modules as separate. More...
 
virtual void * getPointerToNamedFunction (const std::string &Name, bool AbortOnFailure=true)
 This method returns the address of the specified function. More...
 
- Public Member Functions inherited from llvm::MCJITMemoryManager
virtual void notifyObjectLoaded (ExecutionEngine *EE, const object::ObjectFile &)
 This method is called after an object has been loaded into memory but before relocations are applied to the loaded sections. More...
 
- 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. More...
 
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. More...
 
virtual void reserveAllocationSpace (uintptr_t CodeSize, uint32_t CodeAlign, uintptr_t RODataSize, uint32_t RODataAlign, uintptr_t RWDataSize, uint32_t 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. More...
 
virtual bool needsToReserveAllocationSpace ()
 Override to return true to enable the reserveAllocationSpace callback. More...
 
virtual bool finalizeMemory (std::string *ErrMsg=nullptr)=0
 This method is called when object loading is complete and section page permissions can be applied. More...
 
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. More...
 
- Public Member Functions inherited from llvm::JITSymbolResolver
virtual ~JITSymbolResolver ()=default
 

Static Public Member Functions

static void registerEHFramesInProcess (uint8_t *Addr, size_t Size)
 Register EH frames in the current process. More...
 
static void deregisterEHFramesInProcess (uint8_t *Addr, size_t Size)
 Deregister EH frames in the current proces. More...
 
static uint64_t getSymbolAddressInProcess (const std::string &Name)
 This method returns the address of the specified function or variable in the current process. More...
 

Protected Types

typedef std::vector< EHFrameEHFrameInfos
 

Protected Attributes

EHFrameInfos EHFrames
 

Detailed Description

Definition at line 58 of file RTDyldMemoryManager.h.

Member Typedef Documentation

◆ EHFrameInfos

typedef std::vector<EHFrame> llvm::RTDyldMemoryManager::EHFrameInfos
protected

Definition at line 143 of file RTDyldMemoryManager.h.

Constructor & Destructor Documentation

◆ RTDyldMemoryManager() [1/2]

llvm::RTDyldMemoryManager::RTDyldMemoryManager ( )
default

◆ RTDyldMemoryManager() [2/2]

llvm::RTDyldMemoryManager::RTDyldMemoryManager ( const RTDyldMemoryManager )
delete

◆ ~RTDyldMemoryManager()

llvm::RTDyldMemoryManager::~RTDyldMemoryManager ( )
override

Definition at line 33 of file RTDyldMemoryManager.cpp.

Member Function Documentation

◆ deregisterEHFrames()

void llvm::RTDyldMemoryManager::deregisterEHFrames ( )
overridevirtual

◆ deregisterEHFramesInProcess()

void llvm::RTDyldMemoryManager::deregisterEHFramesInProcess ( uint8_t *  Addr,
size_t  Size 
)
static

Deregister EH frames in the current proces.

Definition at line 130 of file RTDyldMemoryManager.cpp.

References llvm::__deregister_frame().

Referenced by llvm::__deregister_frame(), and deregisterEHFrames().

◆ findSymbol()

JITSymbol llvm::RTDyldMemoryManager::findSymbol ( const std::string &  Name)
inlineoverridevirtual

This method returns a RuntimeDyld::SymbolInfo for the specified function or variable.

It is used to resolve symbols during module linking.

By default this falls back on the legacy lookup method: 'getSymbolAddress'. The address returned by getSymbolAddress is treated as a strong, exported symbol, consistent with historical treatment by RuntimeDyld.

Clients writing custom RTDyldMemoryManagers are encouraged to override this method and return a SymbolInfo with the flags set correctly. This is necessary for RuntimeDyld to correctly handle weak and non-exported symbols.

Implements llvm::JITSymbolResolver.

Definition at line 98 of file RTDyldMemoryManager.h.

References llvm::JITSymbolFlags::Exported.

◆ findSymbolInLogicalDylib()

JITSymbol llvm::RTDyldMemoryManager::findSymbolInLogicalDylib ( const std::string &  Name)
inlineoverridevirtual

Default to treating all modules as separate.

By default this falls back on the legacy lookup method: 'getSymbolAddressInLogicalDylib'. The address returned by getSymbolAddressInLogicalDylib is treated as a strong, exported symbol, consistent with historical treatment by RuntimeDyld.

Clients writing custom RTDyldMemoryManagers are encouraged to override this method and return a SymbolInfo with the flags set correctly. This is necessary for RuntimeDyld to correctly handle weak and non-exported symbols.

Implements llvm::JITSymbolResolver.

Definition at line 121 of file RTDyldMemoryManager.h.

References llvm::JITSymbolFlags::Exported.

◆ getPointerToNamedFunction()

void * llvm::RTDyldMemoryManager::getPointerToNamedFunction ( const std::string &  Name,
bool  AbortOnFailure = true 
)
virtual

This method returns the address of the specified function.

As such it is only useful for resolving library symbols, not code generated symbols.

If AbortOnFailure is false and no function with the given name is found, this function returns a null pointer. Otherwise, it prints a message to stderr and aborts.

This function is deprecated for memory managers to be used with MCJIT or RuntimeDyld. Use getSymbolAddress instead.

Definition at line 290 of file RTDyldMemoryManager.cpp.

References getSymbolAddress(), and llvm::report_fatal_error().

◆ getSymbolAddress()

virtual uint64_t llvm::RTDyldMemoryManager::getSymbolAddress ( const std::string &  Name)
inlinevirtual

Legacy symbol lookup - DEPRECATED! Please override findSymbol instead.

This method returns the address of the specified function or variable. It is used to resolve symbols during module linking.

Definition at line 83 of file RTDyldMemoryManager.h.

Referenced by getPointerToNamedFunction().

◆ getSymbolAddressInLogicalDylib()

virtual uint64_t llvm::RTDyldMemoryManager::getSymbolAddressInLogicalDylib ( const std::string &  Name)
inlinevirtual

Legacy symbol lookup – DEPRECATED! Please override findSymbolInLogicalDylib instead.

Default to treating all modules as separate.

Definition at line 106 of file RTDyldMemoryManager.h.

◆ getSymbolAddressInProcess()

uint64_t llvm::RTDyldMemoryManager::getSymbolAddressInProcess ( const std::string &  Name)
static

This method returns the address of the specified function or variable in the current process.

Definition at line 229 of file RTDyldMemoryManager.cpp.

References llvm::jit_noop(), and llvm::sys::DynamicLibrary::SearchForAddressOfSymbol().

◆ operator=()

void llvm::RTDyldMemoryManager::operator= ( const RTDyldMemoryManager )
delete

◆ registerEHFrames()

void llvm::RTDyldMemoryManager::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 137 of file RTDyldMemoryManager.cpp.

References EHFrames, and registerEHFramesInProcess().

◆ registerEHFramesInProcess()

void llvm::RTDyldMemoryManager::registerEHFramesInProcess ( uint8_t *  Addr,
size_t  Size 
)
static

Register EH frames in the current process.

Definition at line 120 of file RTDyldMemoryManager.cpp.

References llvm::__register_frame().

Referenced by llvm::__deregister_frame(), and registerEHFrames().

Member Data Documentation

◆ EHFrames

EHFrameInfos llvm::RTDyldMemoryManager::EHFrames
protected

Definition at line 144 of file RTDyldMemoryManager.h.

Referenced by deregisterEHFrames(), and registerEHFrames().


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