MemoryBuffer.cpp File Reference

#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 <cassert>
#include <cerrno>
#include <cstdio>
#include <cstring>
#include <new>
#include <sys/types.h>
#include <system_error>
#include <unistd.h>

Include dependency graph for MemoryBuffer.cpp:

Go to the source code of this file.

Functions
static void	CopyStringRef (char *Memory, StringRef Data)
void *	operator new (size_t N, const NamedBufferAlloc &Alloc)
static ErrorOr < std::unique_ptr < MemoryBuffer > >	getMemoryBufferForStream (int FD, StringRef BufferName)
static ErrorOr < std::unique_ptr < MemoryBuffer > >	getFileAux (const char *Filename, int64_t FileSize, bool RequiresNullTerminator, bool IsVolatileSize)
static ErrorOr < std::unique_ptr < MemoryBuffer > >	getOpenFileImpl (int FD, const char *Filename, uint64_t FileSize, uint64_t MapSize, int64_t Offset, bool RequiresNullTerminator, bool IsVolatileSize)
static bool	shouldUseMmap (int FD, size_t FileSize, size_t MapSize, off_t Offset, bool RequiresNullTerminator, int PageSize, bool IsVolatileSize)

---

Function Documentation

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::LibFunc::memcpy, and llvm::StringRef::size().

Referenced by llvm::MemoryBuffer::getNewUninitMemBuffer(), and operator new().

static ErrorOr< std::unique_ptr< MemoryBuffer > > getFileAux	(	const char *	Filename,
		int64_t	FileSize,
		bool	RequiresNullTerminator,
		bool	IsVolatileSize
	)		[static]

Definition at line 247 of file MemoryBuffer.cpp.

References getOpenFileImpl(), llvm::sys::fs::openFileForRead(), and llvm::MipsISD::Ret.

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

static ErrorOr<std::unique_ptr<MemoryBuffer> > getMemoryBufferForStream	(	int	FD,
		StringRef	BufferName
	)		[static]

Definition at line 209 of file MemoryBuffer.cpp.

References llvm::SmallVectorTemplateCommon< char >::end(), llvm::MemoryBuffer::getMemBufferCopy(), llvm::LibFunc::read, llvm::SmallVectorImpl< char >::reserve(), llvm::SmallVectorImpl< char >::set_size(), and llvm::SmallVectorTemplateCommon< char >::size().

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

static ErrorOr< std::unique_ptr< MemoryBuffer > > getOpenFileImpl	(	int	FD,
		const char *	Filename,
		uint64_t	FileSize,
		uint64_t	MapSize,
		int64_t	Offset,
		bool	RequiresNullTerminator,
		bool	IsVolatileSize
	)		[static]

Definition at line 318 of file MemoryBuffer.cpp.

References llvm::sys::fs::block_file, llvm::sys::process::get_self(), getMemoryBufferForStream(), llvm::MemoryBuffer::getNewUninitMemBuffer(), llvm::sys::fs::file_status::getSize(), llvm::make_error_code(), llvm::LibFunc::memset, llvm::not_enough_memory, llvm::sys::self_process::page_size(), llvm::LibFunc::pread, llvm::LibFunc::read, llvm::sys::fs::regular_file, shouldUseMmap(), llvm::sys::fs::status(), and llvm::sys::fs::file_status::type().

Referenced by getFileAux(), llvm::MemoryBuffer::getOpenFile(), and llvm::MemoryBuffer::getOpenFileSlice().

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

Definition at line 72 of file MemoryBuffer.cpp.

References CopyStringRef(), and operator new().

static bool shouldUseMmap	(	int	FD,
		size_t	FileSize,
		size_t	MapSize,
		off_t	Offset,
		bool	RequiresNullTerminator,
		int	PageSize,
		bool	IsVolatileSize
	)		[static]

Definition at line 261 of file MemoryBuffer.cpp.

References llvm::sys::fs::file_status::getSize(), and llvm::sys::fs::status().

Referenced by getOpenFileImpl().