X-Git-Url: http://plrg.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FSupport%2FMemoryBuffer.cpp;h=abf4f60b27a61487fd8c9b1e0e270ddab9f42770;hb=1d04a2324c4e86320b5452f5262782c569cd3315;hp=b1ebbf8e4f35c06c61ef4c68a481d0053b22cd5f;hpb=81f207bf78fd79a5059e34b523ec881378227989;p=oota-llvm.git diff --git a/lib/Support/MemoryBuffer.cpp b/lib/Support/MemoryBuffer.cpp index b1ebbf8e4f3..abf4f60b27a 100644 --- a/lib/Support/MemoryBuffer.cpp +++ b/lib/Support/MemoryBuffer.cpp @@ -14,19 +14,20 @@ #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/system_error.h" #include #include #include #include #include #include +#include #if !defined(_MSC_VER) && !defined(__MINGW32__) #include #else @@ -156,9 +157,10 @@ MemoryBuffer *MemoryBuffer::getNewMemBuffer(size_t Size, StringRef BufferName) { /// if the Filename is "-". If an error occurs, this returns null and fills /// in *ErrStr with a reason. If stdin is empty, this API (unlike getSTDIN) /// returns an empty buffer. -error_code MemoryBuffer::getFileOrSTDIN(StringRef Filename, - std::unique_ptr &Result, - int64_t FileSize) { +std::error_code +MemoryBuffer::getFileOrSTDIN(StringRef Filename, + std::unique_ptr &Result, + int64_t FileSize) { if (Filename == "-") return getSTDIN(Result); return getFile(Filename, Result, FileSize); @@ -190,7 +192,7 @@ class MemoryBufferMMapFile : public MemoryBuffer { public: MemoryBufferMMapFile(bool RequiresNullTerminator, int FD, uint64_t Len, - uint64_t Offset, error_code EC) + uint64_t Offset, std::error_code EC) : MFR(FD, false, sys::fs::mapped_file_region::readonly, getLegalMapSize(Len, Offset), getLegalMapOffset(Offset), EC) { if (!EC) { @@ -210,9 +212,9 @@ public: }; } -static error_code getMemoryBufferForStream(int FD, - StringRef BufferName, - std::unique_ptr &Result) { +static std::error_code +getMemoryBufferForStream(int FD, StringRef BufferName, + std::unique_ptr &Result) { const ssize_t ChunkSize = 4096*4; SmallString Buffer; ssize_t ReadBytes; @@ -222,26 +224,25 @@ static error_code getMemoryBufferForStream(int FD, ReadBytes = read(FD, Buffer.end(), ChunkSize); if (ReadBytes == -1) { if (errno == EINTR) continue; - return error_code(errno, std::generic_category()); + return std::error_code(errno, std::generic_category()); } Buffer.set_size(Buffer.size() + ReadBytes); } while (ReadBytes != 0); Result.reset(MemoryBuffer::getMemBufferCopy(Buffer, BufferName)); - return error_code(); + return std::error_code(); } -static error_code getFileAux(const char *Filename, - std::unique_ptr &Result, - int64_t FileSize, - bool RequiresNullTerminator, - bool IsVolatileSize); - -error_code MemoryBuffer::getFile(Twine Filename, - std::unique_ptr &Result, - int64_t FileSize, - bool RequiresNullTerminator, - bool IsVolatileSize) { +static std::error_code getFileAux(const char *Filename, + std::unique_ptr &Result, + int64_t FileSize, bool RequiresNullTerminator, + bool IsVolatileSize); + +std::error_code MemoryBuffer::getFile(Twine Filename, + std::unique_ptr &Result, + int64_t FileSize, + bool RequiresNullTerminator, + bool IsVolatileSize) { // Ensure the path is null terminated. SmallString<256> PathBuf; StringRef NullTerminatedName = Filename.toNullTerminatedStringRef(PathBuf); @@ -249,23 +250,25 @@ error_code MemoryBuffer::getFile(Twine Filename, RequiresNullTerminator, IsVolatileSize); } -static error_code getOpenFileImpl(int FD, const char *Filename, - std::unique_ptr &Result, - uint64_t FileSize, uint64_t MapSize, - int64_t Offset, bool RequiresNullTerminator, - bool IsVolatileSize); +static std::error_code getOpenFileImpl(int FD, const char *Filename, + std::unique_ptr &Result, + uint64_t FileSize, uint64_t MapSize, + int64_t Offset, + bool RequiresNullTerminator, + bool IsVolatileSize); -static error_code getFileAux(const char *Filename, - std::unique_ptr &Result, int64_t FileSize, - bool RequiresNullTerminator, - bool IsVolatileSize) { +static std::error_code getFileAux(const char *Filename, + std::unique_ptr &Result, + int64_t FileSize, bool RequiresNullTerminator, + bool IsVolatileSize) { int FD; - error_code EC = sys::fs::openFileForRead(Filename, FD); + std::error_code EC = sys::fs::openFileForRead(Filename, FD); if (EC) return EC; - error_code ret = getOpenFileImpl(FD, Filename, Result, FileSize, FileSize, 0, - RequiresNullTerminator, IsVolatileSize); + std::error_code ret = + getOpenFileImpl(FD, Filename, Result, FileSize, FileSize, 0, + RequiresNullTerminator, IsVolatileSize); close(FD); return ret; } @@ -318,11 +321,12 @@ static bool shouldUseMmap(int FD, return true; } -static error_code getOpenFileImpl(int FD, const char *Filename, - std::unique_ptr &Result, - uint64_t FileSize, uint64_t MapSize, - int64_t Offset, bool RequiresNullTerminator, - bool IsVolatileSize) { +static std::error_code getOpenFileImpl(int FD, const char *Filename, + std::unique_ptr &Result, + uint64_t FileSize, uint64_t MapSize, + int64_t Offset, + bool RequiresNullTerminator, + bool IsVolatileSize) { static int PageSize = sys::process::get_self()->page_size(); // Default is to map the full file. @@ -331,7 +335,7 @@ static error_code getOpenFileImpl(int FD, const char *Filename, // file descriptor is cheaper than stat on a random path. if (FileSize == uint64_t(-1)) { sys::fs::file_status Status; - error_code EC = sys::fs::status(FD, Status); + std::error_code EC = sys::fs::status(FD, Status); if (EC) return EC; @@ -350,18 +354,18 @@ static error_code getOpenFileImpl(int FD, const char *Filename, if (shouldUseMmap(FD, FileSize, MapSize, Offset, RequiresNullTerminator, PageSize, IsVolatileSize)) { - error_code EC; + std::error_code EC; Result.reset(new (NamedBufferAlloc(Filename)) MemoryBufferMMapFile( RequiresNullTerminator, FD, MapSize, Offset, EC)); if (!EC) - return error_code(); + return std::error_code(); } MemoryBuffer *Buf = MemoryBuffer::getNewUninitMemBuffer(MapSize, Filename); if (!Buf) { // Failed to create a buffer. The only way it can fail is if // new(std::nothrow) returns 0. - return make_error_code(std::errc::not_enough_memory); + return make_error_code(errc::not_enough_memory); } std::unique_ptr SB(Buf); @@ -370,7 +374,7 @@ static error_code getOpenFileImpl(int FD, const char *Filename, size_t BytesLeft = MapSize; #ifndef HAVE_PREAD if (lseek(FD, Offset, SEEK_SET) == -1) - return error_code(errno, std::generic_category()); + return std::error_code(errno, std::generic_category()); #endif while (BytesLeft) { @@ -383,7 +387,7 @@ static error_code getOpenFileImpl(int FD, const char *Filename, if (errno == EINTR) continue; // Error while reading. - return error_code(errno, std::generic_category()); + return std::error_code(errno, std::generic_category()); } if (NumRead == 0) { memset(BufPtr, 0, BytesLeft); // zero-initialize rest of the buffer. @@ -394,22 +398,21 @@ static error_code getOpenFileImpl(int FD, const char *Filename, } Result.swap(SB); - return error_code(); + return std::error_code(); } -error_code MemoryBuffer::getOpenFile(int FD, const char *Filename, - std::unique_ptr &Result, - uint64_t FileSize, - bool RequiresNullTerminator, - bool IsVolatileSize) { +std::error_code MemoryBuffer::getOpenFile(int FD, const char *Filename, + std::unique_ptr &Result, + uint64_t FileSize, + bool RequiresNullTerminator, + bool IsVolatileSize) { return getOpenFileImpl(FD, Filename, Result, FileSize, FileSize, 0, RequiresNullTerminator, IsVolatileSize); } -error_code MemoryBuffer::getOpenFileSlice(int FD, const char *Filename, - std::unique_ptr &Result, - uint64_t MapSize, int64_t Offset, - bool IsVolatileSize) { +std::error_code MemoryBuffer::getOpenFileSlice( + int FD, const char *Filename, std::unique_ptr &Result, + uint64_t MapSize, int64_t Offset, bool IsVolatileSize) { return getOpenFileImpl(FD, Filename, Result, -1, MapSize, Offset, false, IsVolatileSize); } @@ -418,7 +421,7 @@ error_code MemoryBuffer::getOpenFileSlice(int FD, const char *Filename, // MemoryBuffer::getSTDIN implementation. //===----------------------------------------------------------------------===// -error_code MemoryBuffer::getSTDIN(std::unique_ptr &Result) { +std::error_code MemoryBuffer::getSTDIN(std::unique_ptr &Result) { // Read in all of the data from stdin, we cannot mmap stdin. // // FIXME: That isn't necessarily true, we should try to mmap stdin and