#include "llvm/Support/MemoryBuffer.h"
#include "llvm/ADT/OwningPtr.h"
#include "llvm/ADT/SmallString.h"
-#include "llvm/Support/MathExtras.h"
+#include "llvm/Config/config.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 <cassert>
+#include <cerrno>
#include <cstdio>
#include <cstring>
-#include <cerrno>
#include <new>
-#include <sys/types.h>
#include <sys/stat.h>
+#include <sys/types.h>
#if !defined(_MSC_VER) && !defined(__MINGW32__)
#include <unistd.h>
-#include <sys/uio.h>
#else
#include <io.h>
+#ifndef S_ISFIFO
+#define S_ISFIFO(x) (0)
+#endif
#endif
#include <fcntl.h>
using namespace llvm;
-namespace { const llvm::error_code success; }
-
//===----------------------------------------------------------------------===//
// MemoryBuffer implementation itself.
//===----------------------------------------------------------------------===//
init(InputData.begin(), InputData.end(), RequiresNullTerminator);
}
- virtual const char *getBufferIdentifier() const {
+ virtual const char *getBufferIdentifier() const LLVM_OVERRIDE {
// The name is stored after the class itself.
return reinterpret_cast<const char*>(this + 1);
}
-
- virtual BufferKind getBufferKind() const {
+
+ virtual BufferKind getBufferKind() const LLVM_OVERRIDE {
return MemoryBuffer_Malloc;
}
};
sys::Path::UnMapFilePages(reinterpret_cast<const char*>(RealStart),
RealSize);
}
-
- virtual BufferKind getBufferKind() const {
+
+ virtual BufferKind getBufferKind() const LLVM_OVERRIDE {
return MemoryBuffer_MMap;
}
};
}
+static error_code getMemoryBufferForStream(int FD,
+ StringRef BufferName,
+ OwningPtr<MemoryBuffer> &result) {
+ const ssize_t ChunkSize = 4096*4;
+ SmallString<ChunkSize> Buffer;
+ ssize_t ReadBytes;
+ // Read into Buffer until we hit EOF.
+ do {
+ Buffer.reserve(Buffer.size() + ChunkSize);
+ ReadBytes = read(FD, Buffer.end(), ChunkSize);
+ if (ReadBytes == -1) {
+ if (errno == EINTR) continue;
+ return error_code(errno, posix_category());
+ }
+ Buffer.set_size(Buffer.size() + ReadBytes);
+ } while (ReadBytes != 0);
+
+ result.reset(MemoryBuffer::getMemBufferCopy(Buffer, BufferName));
+ return error_code::success();
+}
+
error_code MemoryBuffer::getFile(StringRef Filename,
OwningPtr<MemoryBuffer> &result,
int64_t FileSize,
OwningPtr<MemoryBuffer> &result,
int64_t FileSize,
bool RequiresNullTerminator) {
+ // First check that the "file" is not a directory
+ bool is_dir = false;
+ error_code err = sys::fs::is_directory(Filename, is_dir);
+ if (err)
+ return err;
+ if (is_dir)
+ return make_error_code(errc::is_a_directory);
+
int OpenFlags = O_RDONLY;
#ifdef O_BINARY
OpenFlags |= O_BINARY; // Open input file in binary mode on win32.
if (fstat(FD, &FileInfo) == -1) {
return error_code(errno, posix_category());
}
+
+ // If this is a named pipe, we can't trust the size. Create the memory
+ // buffer by copying off the stream.
+ if (S_ISFIFO(FileInfo.st_mode)) {
+ return getMemoryBufferForStream(FD, Filename, result);
+ }
+
FileSize = FileInfo.st_size;
}
MapSize = FileSize;
RealMapOffset)) {
result.reset(GetNamedBuffer<MemoryBufferMMapFile>(
StringRef(Pages + Delta, MapSize), Filename, RequiresNullTerminator));
- return success;
+ return error_code::success();
}
}
char *BufPtr = const_cast<char*>(SB->getBufferStart());
size_t BytesLeft = MapSize;
+#ifndef HAVE_PREAD
if (lseek(FD, Offset, SEEK_SET) == -1)
return error_code(errno, posix_category());
+#endif
while (BytesLeft) {
+#ifdef HAVE_PREAD
+ ssize_t NumRead = ::pread(FD, BufPtr, BytesLeft, MapSize-BytesLeft+Offset);
+#else
ssize_t NumRead = ::read(FD, BufPtr, BytesLeft);
+#endif
if (NumRead == -1) {
if (errno == EINTR)
continue;
// Error while reading.
return error_code(errno, posix_category());
- } else if (NumRead == 0) {
- // We hit EOF early, truncate and terminate buffer.
- Buf->BufferEnd = BufPtr;
- *BufPtr = 0;
- result.swap(SB);
- return success;
+ }
+ if (NumRead == 0) {
+ assert(0 && "We got inaccurate FileSize value or fstat reported an "
+ "invalid file size.");
+ *BufPtr = '\0'; // null-terminate at the actual size.
+ break;
}
BytesLeft -= NumRead;
BufPtr += NumRead;
}
result.swap(SB);
- return success;
+ return error_code::success();
}
//===----------------------------------------------------------------------===//
// fallback if it fails.
sys::Program::ChangeStdinToBinary();
- const ssize_t ChunkSize = 4096*4;
- SmallString<ChunkSize> Buffer;
- ssize_t ReadBytes;
- // Read into Buffer until we hit EOF.
- do {
- Buffer.reserve(Buffer.size() + ChunkSize);
- ReadBytes = read(0, Buffer.end(), ChunkSize);
- if (ReadBytes == -1) {
- if (errno == EINTR) continue;
- return error_code(errno, posix_category());
- }
- Buffer.set_size(Buffer.size() + ReadBytes);
- } while (ReadBytes != 0);
-
- result.reset(getMemBufferCopy(Buffer, "<stdin>"));
- return success;
+ return getMemoryBufferForStream(0, "<stdin>", result);
}