def IsBitcode(filename):
fp = DriverOpen(filename, 'rb')
header = fp.read(4)
DriverClose(fp)
# Raw bitcode
if header == LLVM_BITCODE_MAGIC:
return True
# Wrapped bitcode
return IsBitcodeWrapperHeader(header)
def SetPortableUrl(json_dict, shortname, filepath):
json_dict['portable'] = {}
json_dict['portable']['pnacl-translate'] = {}
json_dict['portable']['pnacl-translate']['url'] = shortname
fd = DriverOpen(filepath, 'r')
sha = hashlib.sha256()
sha.update(fd.read())
fd.close()
json_dict['portable']['pnacl-translate']['sha256'] = sha.hexdigest()
def SetPortableUrl(json_dict, shortname, filepath):
json_dict['portable'] = {}
json_dict['portable']['pnacl-translate'] = {}
json_dict['portable']['pnacl-translate']['url'] = shortname
fd = DriverOpen(filepath, 'r')
sha = hashlib.sha256()
sha.update(fd.read())
fd.close()
json_dict['portable']['pnacl-translate']['sha256'] = sha.hexdigest()
def WrapBitcode(output):
""" Hash the bitcode and insert a wrapper header with the sha value.
If the bitcode is already wrapped, the old hash is overwritten.
"""
fd = DriverOpen(output, 'rb')
maybe_header = fd.read(16)
if IsBitcodeWrapperHeader(maybe_header):
offset, bytes_left = GetBasicHeaderData(maybe_header)
fd.seek(offset)
else:
offset = 0
fd.seek(0, os.SEEK_END)
bytes_left = fd.tell()
fd.seek(0)
# get the hash
sha = hashlib.sha256()
while bytes_left:
block = fd.read(min(bytes_left, 4096))
sha.update(block)
bytes_left -= len(block)
DriverClose(fd)
# run bc-wrap
Run(' '.join(['${LLVM_BCWRAP}', '-hash', sha.hexdigest(), '"%s"' % output]))
def GetELFHeader(filename): fp = DriverOpen(filename, 'rb') header = fp.read(16 + 2 + 2) DriverClose(fp) return DecodeELFHeader(header, filename)
def IsWrappedBitcode(filename): fp = DriverOpen(filename, 'rb') header = fp.read(4) iswbc = IsBitcodeWrapperHeader(header) DriverClose(fp) return iswbc
def GetELFHeader(filename): fp = DriverOpen(filename, 'rb') # Read max(sizeof(Elf64_Ehdr), sizeof(Elf32_Ehdr)), which is 64 bytes. header = fp.read(64) DriverClose(fp) return DecodeELFHeader(header, filename)
def GetELFHeader(filename):
fp = DriverOpen(filename, 'rb')
# Read max(sizeof(Elf64_Ehdr), sizeof(Elf32_Ehdr)), which is 64 bytes.
header = fp.read(64)
DriverClose(fp)
return DecodeELFHeader(header, filename)
def GetELFHeader(filename):
fp = DriverOpen(filename, 'rb')
header = fp.read(16 + 2 + 2)
DriverClose(fp)
return DecodeELFHeader(header, filename)
def GetBitcodeMagic(filename):
fp = DriverOpen(filename, 'rb')
header = fp.read(4)
DriverClose(fp)
return header
