diff options
Diffstat (limited to 'python/basicblock.py')
| -rw-r--r-- | python/basicblock.py | 95 |
1 files changed, 64 insertions, 31 deletions
diff --git a/python/basicblock.py b/python/basicblock.py index 4bf2f3b2..27eadd51 100644 --- a/python/basicblock.py +++ b/python/basicblock.py @@ -25,6 +25,7 @@ import binaryninja from binaryninja import highlight from binaryninja import _binaryninjacore as core from binaryninja.enums import BranchType, HighlightColorStyle, HighlightStandardColor, InstructionTextTokenType +from binaryninja import log # 2-3 compatibility from binaryninja import range @@ -61,6 +62,8 @@ class BasicBlock(object): self.handle = core.handle_of_type(handle, core.BNBasicBlock) self._arch = None self._func = None + self._instStarts = None + self._instLengths = None def __del__(self): core.BNFreeBasicBlock(self.handle) @@ -75,12 +78,71 @@ class BasicBlock(object): return True return ctypes.addressof(self.handle.contents) != ctypes.addressof(value.handle.contents) + def __setattr__(self, name, value): + try: + object.__setattr__(self, name, value) + except AttributeError: + raise AttributeError("attribute '%s' is read only" % name) + + def __len__(self): + return int(core.BNGetBasicBlockLength(self.handle)) + + def __repr__(self): + arch = self.arch + if arch: + return "<block: %s@%#x-%#x>" % (arch.name, self.start, self.end) + else: + return "<block: %#x-%#x>" % (self.start, self.end) + + def __iter__(self): + if self._instStarts is None: + # no cache is instruction start cache is built so we don't build one + # because the user is likely iterating only + idx = self.start + while idx < self.end: + data = self.view.read(idx, min(self.arch.max_instr_length, self.end - idx)) + inst_text = self.arch.get_instruction_text(data, idx) + if inst_text[1] == 0: + break + yield inst_text + idx += inst_text[1] + else: + for start, length in zip(self._instStarts, self._instLengths): + inst_text = self.arch.get_instruction_text(self.view.read(start, length), start) + if inst_text[1] == 0: + break + yield inst_text + + def __getitem__(self, i): + self._buildStartCache() + start = self._instStarts[i] + length = self._instLengths[i] + data = self.view.read(start, length) + return self.arch.get_instruction_text(data, start) + + def __hash__(self): + return hash((self.start, self.end, self.arch.name)) + + def _buildStartCache(self): + if self._instStarts is None: + # build the instruction start cache + self._instLengths = [] + self._instStarts = [] + start = self.start + while start < self.end: + length = self.view.get_instruction_length(start) + self._instLengths.append(length) + self._instStarts.append(start) + start += length + def _create_instance(self, handle, view): """Internal method used to instantiate child instances""" return BasicBlock(handle, view) - def __hash__(self): - return hash((self.start, self.end, self.arch.name)) + @property + def instruction_count(self): + self._buildStartCache() + return len(self._instStarts) @property def function(self): @@ -290,35 +352,6 @@ class BasicBlock(object): core.BNFreeBasicBlockList(out_blocks, count.value) return result - def __setattr__(self, name, value): - try: - object.__setattr__(self, name, value) - except AttributeError: - raise AttributeError("attribute '%s' is read only" % name) - - def __len__(self): - return int(core.BNGetBasicBlockLength(self.handle)) - - def __repr__(self): - arch = self.arch - if arch: - return "<block: %s@%#x-%#x>" % (arch.name, self.start, self.end) - else: - return "<block: %#x-%#x>" % (self.start, self.end) - - def __iter__(self): - start = self.start - end = self.end - - idx = start - while idx < end: - data = self.view.read(idx, min(self.arch.max_instr_length, end - idx)) - inst_text = self.arch.get_instruction_text(data, idx) - if inst_text[1] == 0: - break - yield inst_text - idx += inst_text[1] - def mark_recent_use(self): core.BNMarkBasicBlockAsRecentlyUsed(self.handle) |