llvm::orc::LocalCXXRuntimeOverridesBase Class Reference

Support class for static dtor execution. More...

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

Inheritance diagram for llvm::orc::LocalCXXRuntimeOverridesBase:

Collaboration diagram for llvm::orc::LocalCXXRuntimeOverridesBase:

Public Member Functions
void	runDestructors ()
	Run any destructors recorded by the overriden __cxa_atexit function (CXAAtExitOverride). More...

Protected Types
using	DestructorPtr = void(*)(void *)
using	CXXDestructorDataPair = std::pair< DestructorPtr, void * >
using	CXXDestructorDataPairList = std::vector< CXXDestructorDataPair >

Protected Member Functions
template<typename PtrTy >
JITTargetAddress	toTargetAddress (PtrTy *P)

Static Protected Member Functions
static int	CXAAtExitOverride (DestructorPtr Destructor, void *Arg, void *DSOHandle)

Protected Attributes
CXXDestructorDataPairList	DSOHandleOverride

Detailed Description

Support class for static dtor execution.

For hosted (in-process) JITs only!

If a __cxa_atexit function isn't found C++ programs that use static destructors will fail to link. However, we don't want to use the host process's __cxa_atexit, because it will schedule JIT'd destructors to run after the JIT has been torn down, which is no good. This class makes it easy to override __cxa_atexit (and the related __dso_handle).

To use, clients should manually call searchOverrides from their symbol resolver. This should generally be done after attempting symbol resolution inside the JIT, but before searching the host process's symbol table. When the client determines that destructors should be run (generally at JIT teardown or after a return from main), the runDestructors method should be called.

Definition at line 161 of file ExecutionUtils.h.

Member Typedef Documentation

CXXDestructorDataPair

using llvm::orc::LocalCXXRuntimeOverridesBase::CXXDestructorDataPair = std::pair<DestructorPtr, void *>

protected

Definition at line 173 of file ExecutionUtils.h.

CXXDestructorDataPairList

using llvm::orc::LocalCXXRuntimeOverridesBase::CXXDestructorDataPairList = std::vector<CXXDestructorDataPair>

protected

Definition at line 174 of file ExecutionUtils.h.

DestructorPtr

using llvm::orc::LocalCXXRuntimeOverridesBase::DestructorPtr = void (*)(void *)

protected

Definition at line 172 of file ExecutionUtils.h.

Member Function Documentation

CXAAtExitOverride()

int llvm::orc::LocalCXXRuntimeOverridesBase::CXAAtExitOverride ( DestructorPtr  Destructor, void *  Arg, void *  DSOHandle  )

staticprotected

Definition at line 159 of file ExecutionUtils.cpp.

runDestructors()

void llvm::orc::LocalCXXRuntimeOverridesBase::runDestructors

(

)

Run any destructors recorded by the overriden __cxa_atexit function (CXAAtExitOverride).

Definition at line 152 of file ExecutionUtils.cpp.

References P.

toTargetAddress()

template<typename PtrTy >

JITTargetAddress llvm::orc::LocalCXXRuntimeOverridesBase::toTargetAddress ( PtrTy *  P )

inlineprotected

Definition at line 168 of file ExecutionUtils.h.

References P.

Member Data Documentation

DSOHandleOverride

CXXDestructorDataPairList llvm::orc::LocalCXXRuntimeOverridesBase::DSOHandleOverride

protected

Definition at line 175 of file ExecutionUtils.h.

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

• include/llvm/ExecutionEngine/Orc/ExecutionUtils.h
• lib/ExecutionEngine/Orc/ExecutionUtils.cpp