def FileType(filename):
# Auto-detect bitcode files, since we can't rely on extensions
ext = filename.split('.')[-1]
# TODO(pdox): We open and read the the first few bytes of each file
# up to 4 times, when we only need to do it once. The
# OS cache prevents us from hitting the disk, but this
# is still slower than it needs to be.
if IsArchive(filename):
return artools.GetArchiveType(filename)
if elftools.IsELF(filename):
return GetELFType(filename)
# If this is LLVM bitcode, we don't have a good way of determining if it
# is an object file or a non-finalized program, so just say 'po' for now.
if IsLLVMBitcode(filename):
return 'po'
if IsPNaClBitcode(filename):
return 'pexe'
if ldtools.IsLinkerScript(filename):
return 'ldscript'
# Use the file extension if it is recognized
if ext in ExtensionMap:
return ExtensionMap[ext]
driver_log.Log.Fatal('%s: Unrecognized file type', filename)
def GetELFType(filename):
""" ELF type as determined by ELF metadata """
assert(elftools.IsELF(filename))
elfheader = elftools.GetELFHeader(filename)
elf_type_map = {
'EXEC': 'nexe',
'REL' : 'o',
'DYN' : 'so'
}
return elf_type_map[elfheader.type]
def IsELF(filename):
return elftools.IsELF(filename)