Error
File::Duplicate (const File &rhs)
{
Error error;
if (IsValid ())
Close();
if (rhs.DescriptorIsValid())
{
#ifdef _WIN32
m_descriptor = ::_dup(rhs.GetDescriptor());
#else
m_descriptor = ::fcntl(rhs.GetDescriptor(), F_DUPFD);
#endif
if (!DescriptorIsValid())
error.SetErrorToErrno();
else
{
m_options = rhs.m_options;
m_own_descriptor = true;
}
}
else
{
error.SetErrorString ("invalid file to duplicate");
}
return error;
}
//----------------------------------------------------------------------
// Memory map "length" bytes from "file" starting "offset"
// bytes into the file. If "length" is set to SIZE_MAX, then
// map as many bytes as possible.
//
// Returns the number of bytes mapped starting from the requested
// offset.
//----------------------------------------------------------------------
size_t
DataBufferMemoryMap::MemoryMapFromFileSpec (const FileSpec* file,
off_t offset,
size_t length,
bool writeable)
{
if (file != NULL)
{
char path[PATH_MAX];
if (file->GetPath(path, sizeof(path)))
{
uint32_t options = File::eOpenOptionRead;
if (writeable)
options |= File::eOpenOptionWrite;
File file;
Error error (file.Open(path, options));
if (error.Success())
{
const bool fd_is_file = true;
MemoryMapFromFileDescriptor (file.GetDescriptor(), offset, length, writeable, fd_is_file);
return GetByteSize();
}
}
}
// We should only get here if there was an error
Clear();
return 0;
}
void
PythonFile::Reset(File &file, const char *mode)
{
char *cmode = const_cast<char *>(mode);
#if PY_MAJOR_VERSION >= 3
Reset(PyRefType::Owned,
PyFile_FromFd(file.GetDescriptor(), nullptr, cmode, -1, nullptr, "ignore", nullptr, 0));
#else
// Read through the Python source, doesn't seem to modify these strings
Reset(PyRefType::Owned,
PyFile_FromFile(file.GetStream(), const_cast<char *>(""), cmode, nullptr));
#endif
}
//----------------------------------------------------------------------
// Memory map "length" bytes from "file" starting "offset"
// bytes into the file. If "length" is set to SIZE_MAX, then
// map as many bytes as possible.
//
// Returns the number of bytes mapped starting from the requested
// offset.
//----------------------------------------------------------------------
size_t
DataBufferMemoryMap::MemoryMapFromFileSpec (const FileSpec* filespec,
lldb::offset_t offset,
size_t length,
bool writeable)
{
if (filespec != NULL)
{
Log *log(lldb_private::GetLogIfAllCategoriesSet (LIBLLDB_LOG_MMAP));
if (log)
{
log->Printf("DataBufferMemoryMap::MemoryMapFromFileSpec(file=\"%s\", offset=0x%" PRIx64 ", length=0x%" PRIx64 ", writeable=%i",
filespec->GetPath().c_str(),
offset,
(uint64_t)length,
writeable);
}
char path[PATH_MAX];
if (filespec->GetPath(path, sizeof(path)))
{
uint32_t options = File::eOpenOptionRead;
if (writeable)
options |= File::eOpenOptionWrite;
File file;
Error error (file.Open(path, options));
if (error.Success())
{
const bool fd_is_file = true;
return MemoryMapFromFileDescriptor (file.GetDescriptor(), offset, length, writeable, fd_is_file);
}
}
}
// We should only get here if there was an error
Clear();
return 0;
}
