#include "llvm/Support/MemoryBuffer.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/Config/config.h"
#include "llvm/Support/Errc.h"
#include "llvm/Support/Errno.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/MathExtras.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/Process.h"
#include "llvm/Support/Program.h"
#include "llvm/Support/SmallVectorMemoryBuffer.h"
#include <cassert>
#include <cerrno>
#include <cstring>
#include <new>
#include <sys/types.h>
#include <system_error>
#include <unistd.h>

Include dependency graph for MemoryBuffer.cpp:

Functions
static void	CopyStringRef (char *Memory, StringRef Data)
	CopyStringRef - Copies contents of a StringRef into a block of memory and null-terminates it. More...

void *	operator new (size_t N, const NamedBufferAlloc &Alloc)

template<typename MB >
static ErrorOr< std::unique_ptr< MB > >	getFileAux (const Twine &Filename, int64_t FileSize, uint64_t MapSize, uint64_t Offset, bool RequiresNullTerminator, bool IsVolatile)

static ErrorOr< std::unique_ptr< WritableMemoryBuffer > >	getMemBufferCopyImpl (StringRef InputData, const Twine &BufferName)

static ErrorOr< std::unique_ptr< WritableMemoryBuffer > >	getMemoryBufferForStream (int FD, const Twine &BufferName)

template<typename MB >
static ErrorOr< std::unique_ptr< MB > >	getOpenFileImpl (int FD, const Twine &Filename, uint64_t FileSize, uint64_t MapSize, int64_t Offset, bool RequiresNullTerminator, bool IsVolatile)

static bool	shouldUseMmap (int FD, size_t FileSize, size_t MapSize, off_t Offset, bool RequiresNullTerminator, int PageSize, bool IsVolatile)

static ErrorOr< std::unique_ptr< WriteThroughMemoryBuffer > >	getReadWriteFile (const Twine &Filename, uint64_t FileSize, uint64_t MapSize, uint64_t Offset)

Function Documentation

◆ CopyStringRef()

static void CopyStringRef	(	char *	Memory,
		StringRef	Data
	)

static

CopyStringRef - Copies contents of a StringRef into a block of memory and null-terminates it.

Definition at line 60 of file MemoryBuffer.cpp.

References llvm::StringRef::data(), llvm::StringRef::empty(), llvm::Intrinsic::memcpy, Name, and llvm::StringRef::size().

Referenced by llvm::WritableMemoryBuffer::getNewUninitMemBuffer().

◆ getFileAux()

template<typename MB >

static ErrorOr< std::unique_ptr< MB > > getFileAux	(	const Twine &	Filename,
		int64_t	FileSize,
		uint64_t	MapSize,
		uint64_t	Offset,
		bool	RequiresNullTerminator,
		bool	IsVolatile
	)

static

Definition at line 244 of file MemoryBuffer.cpp.

References llvm::AMDGPU::HSAMD::Kernel::Arg::Key::IsVolatile, llvm::sys::fs::OF_None, llvm::sys::fs::openFileForRead(), and llvm::MipsISD::Ret.

◆ getMemBufferCopyImpl()

static ErrorOr<std::unique_ptr<WritableMemoryBuffer> > getMemBufferCopyImpl	(	StringRef	InputData,
		const Twine &	BufferName
	)

static

Definition at line 127 of file MemoryBuffer.cpp.

References llvm::StringRef::data(), llvm::WritableMemoryBuffer::getNewUninitMemBuffer(), llvm::make_error_code(), llvm::Intrinsic::memcpy, llvm::not_enough_memory, and llvm::StringRef::size().

Referenced by llvm::MemoryBuffer::getMemBufferCopy(), and getMemoryBufferForStream().

◆ getMemoryBufferForStream()

static ErrorOr<std::unique_ptr<WritableMemoryBuffer> > getMemoryBufferForStream	(	int	FD,
		const Twine &	BufferName
	)

static

Definition at line 212 of file MemoryBuffer.cpp.

References llvm::SmallVectorTemplateCommon< T >::end(), getMemBufferCopyImpl(), llvm::support::endian::read(), llvm::SmallVectorImpl< char >::reserve(), llvm::sys::RetryAfterSignal(), llvm::SmallVectorBase::set_size(), and llvm::SmallVectorBase::size().

Referenced by llvm::MemoryBuffer::getFileAsStream(), getOpenFileImpl(), and llvm::MemoryBuffer::getSTDIN().

◆ getOpenFileImpl()

template<typename MB >

static ErrorOr< std::unique_ptr< MB > > getOpenFileImpl	(	int	FD,
		const Twine &	Filename,
		uint64_t	FileSize,
		uint64_t	MapSize,
		int64_t	Offset,
		bool	RequiresNullTerminator,
		bool	IsVolatile
	)

static

Definition at line 418 of file MemoryBuffer.cpp.

References llvm::sys::fs::block_file, getMemoryBufferForStream(), llvm::WritableMemoryBuffer::getNewUninitMemBuffer(), llvm::sys::Process::getPageSize(), llvm::sys::fs::basic_file_status::getSize(), llvm::make_error_code(), llvm::Intrinsic::memset, llvm::not_enough_memory, PageSize, llvm::support::endian::read(), llvm::sys::fs::regular_file, llvm::sys::RetryAfterSignal(), shouldUseMmap(), llvm::sys::fs::status(), and llvm::sys::fs::basic_file_status::type().

Referenced by llvm::MemoryBuffer::getFile().

◆ getReadWriteFile()

static ErrorOr<std::unique_ptr<WriteThroughMemoryBuffer> > getReadWriteFile	(	const Twine &	Filename,
		uint64_t	FileSize,
		uint64_t	MapSize,
		uint64_t	Offset
	)