def __init__(self, clazz, f):
self._clazz = clazz
# access_flags
readU2(f)
self._nameIndex = readU2(f)
self._descriptorIndex = readU2(f)
self._readMethodAttributes(f)
def __init__(self, clazz, f):
self._clazz = clazz
# access_flags
readU2(f)
self._nameIndex = readU2(f)
self._descriptorIndex = readU2(f)
self._readMethodAttributes(f)
def _readMethodAttributes(self, f):
"""Read the method attributes section"""
attributesCount = readU2(f)
# print "Attributes: %d" % attributesCount
attributesIndex = 1
while attributesIndex <= attributesCount:
self._readMethodAttribute(f, attributesIndex)
attributesIndex += 1
def _readMethodAttributes(self, f):
"""Read the method attributes section"""
attributesCount = readU2(f)
# print "Attributes: %d" % attributesCount
attributesIndex = 1
while attributesIndex <= attributesCount:
self._readMethodAttribute(f, attributesIndex)
attributesIndex += 1
def _readCp(self, f):
cpCount = readU2(f) - 1
cpIndex = 1
print "Constant pool count: %d" % cpCount
while cpIndex <= cpCount:
# print "Reading field %d" % cpIndex
print "%d %s" % (cpIndex, self._readToNextCpStruct(f, cpIndex))
cpIndex += 1
def __init__(self, path):
with open(path, "rb") as f:
f.seek(8)
self._readCp(f)
# Skip access flags, tjhis class, super class refs
f.seek(6, os.SEEK_CUR)
# TODO: Yes, need to deal with when these aren't actually 0!
print "\nInterfaces count: %d" % readU2(f)
print "Fields count: %d" % readU2(f)
methodsCount = readU2(f)
print "Methods count: %d\n" % methodsCount
for i in range(methodsCount):
m = jmethod(self, f)
self._methods[m.getName()] = m
def _readCp(self, f):
cpCount = readU2(f) - 1
cpIndex = 1
print "Constant pool count: %d" % cpCount;
while cpIndex <= cpCount:
# print "Reading field %d" % cpIndex
print "%d %s" % (cpIndex, self._readToNextCpStruct(f, cpIndex))
cpIndex += 1
def __init__(self, path):
with open(path, "rb") as f:
f.seek(8)
self._readCp(f)
# Skip access flags, tjhis class, super class refs
f.seek(6, os.SEEK_CUR)
# TODO: Yes, need to deal with when these aren't actually 0!
print "\nInterfaces count: %d" % readU2(f)
print "Fields count: %d" % readU2(f)
methodsCount = readU2(f)
print "Methods count: %d\n" % methodsCount
for i in range(methodsCount):
m = jmethod(self, f)
self._methods[m.getName()] = m
def _readMethodAttribute(self, f, index):
"""Read the top level details of a method attribute"""
attrNameIndex = readU2(f)
attrName = self._clazz._utf8Strings[attrNameIndex]
# print "Name: %s" % attrName
if "Code" == attrName:
self._readMethodCodeAttribute(f)
else:
attrLen = readU4(f)
f.read(attrLen)
def _readMethodAttribute(self, f, index):
"""Read the top level details of a method attribute"""
attrNameIndex = readU2(f)
attrName = self._clazz._utf8Strings[attrNameIndex]
# print "Name: %s" % attrName
if "Code" == attrName:
self._readMethodCodeAttribute(f)
else:
attrLen = readU4(f)
f.read(attrLen)
def _readMethodCodeAttribute(self, f):
"""Read a method code attribute"""
attrLen = readU4(f)
# print "Length: %d" % attrLen
# max stack
readU2(f)
# max locals
readU2(f)
codeLen = readU4(f)
# print "Code length: %d" % codeLen
self._code = []
codeCount = 1
while codeCount <= codeLen:
self._code.append(ord(f.read(1)))
codeCount += 1
f.read(attrLen - codeLen - 8)
def _readMethodCodeAttribute(self, f):
"""Read a method code attribute"""
attrLen = readU4(f)
# print "Length: %d" % attrLen
# max stack
readU2(f)
# max locals
readU2(f)
codeLen = readU4(f)
# print "Code length: %d" % codeLen
self._code = []
codeCount = 1
while codeCount <= codeLen:
self._code.append(ord(f.read(1)))
codeCount += 1
f.read(attrLen - codeLen - 8)
def _readToNextCpStruct(self, f, index):
tag = ord(f.read(1))
# print "Tag %d %s" % (tag, TAG_NAMES[tag])
res = TAG_NAMES[tag]
remainingSeek = 0
if tag == 1:
# FIXME: Yes, this will blow badly on encountering anything other than ASCII
# https://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html
strLen = readU2(f)
res += " "
utf8 = f.read(strLen)
self._utf8Strings[index] = utf8
res += utf8
# print struct.unpack("s", clazz.read(strLen))[0]
# remainingSeek = readU2(clazz)
elif tag == 7: # Class
nameIndex = readU2(f)
res += " %d" % nameIndex
elif tag == 8: # String
stringIndex = readU2(f)
res += " %d" % stringIndex
elif tag == 9: # Fieldref
classIndex = readU2(f)
nameAndTypeIndex = readU2(f)
res += " %d, %d" % (classIndex, nameAndTypeIndex)
elif tag == 10: # Methodref
classIndex = readU2(f)
nameAndTypeIndex = readU2(f)
res += " %d, %d" % (classIndex, nameAndTypeIndex)
elif tag == 11: # InterfaceMethodref
classIndex = readU2(f)
nameAndTypeIndex = readU2(f)
res += " %d, %d" % (classIndex, nameAndTypeIndex)
elif tag == 12: # NameAndType
nameIndex = readU2(f)
descriptorIndex = readU2(f)
res += " %d, %d" % (nameIndex, descriptorIndex)
else:
print "ERROR: Unrecognized tag %d" % tag
sys.exit(1)
# print "Remaining seek %d" % remainingSeek
if remainingSeek > 0:
f.seek(remainingSeek, os.SEEK_CUR)
return res
def _readToNextCpStruct(self, f, index):
tag = ord(f.read(1))
# print "Tag %d %s" % (tag, TAG_NAMES[tag])
res = TAG_NAMES[tag]
remainingSeek = 0
if tag == 1:
# FIXME: Yes, this will blow badly on encountering anything other than ASCII
# https://docs.oracle.com/javase/specs/jvms/se7/html/jvms-4.html
strLen = readU2(f)
res += " "
utf8 = f.read(strLen)
self._utf8Strings[index] = utf8
res += utf8
# print struct.unpack("s", clazz.read(strLen))[0]
# remainingSeek = readU2(clazz)
elif tag == 7: # Class
nameIndex = readU2(f)
res += " %d" % nameIndex
elif tag == 8: # String
stringIndex = readU2(f)
res += " %d" % stringIndex
elif tag == 9: # Fieldref
classIndex = readU2(f)
nameAndTypeIndex = readU2(f)
res += " %d, %d" % (classIndex, nameAndTypeIndex)
elif tag == 10: # Methodref
classIndex = readU2(f)
nameAndTypeIndex = readU2(f)
res += " %d, %d" % (classIndex, nameAndTypeIndex)
elif tag == 11: # InterfaceMethodref
classIndex = readU2(f)
nameAndTypeIndex = readU2(f)
res += " %d, %d" % (classIndex, nameAndTypeIndex)
elif tag == 12: # NameAndType
nameIndex = readU2(f)
descriptorIndex = readU2(f)
res += " %d, %d" % (nameIndex, descriptorIndex)
else:
print "ERROR: Unrecognized tag %d" % tag
sys.exit(1)
# print "Remaining seek %d" % remainingSeek
if remainingSeek > 0:
f.seek(remainingSeek, os.SEEK_CUR)
return res
