INSTRUCTION stringlengths 1 8.43k | RESPONSE stringlengths 75 104k |
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Returns URL to placeholder image Example: http:// placehold. it/ 640x480 | def image_url(self, width=None, height=None):
"""
Returns URL to placeholder image
Example: http://placehold.it/640x480
"""
width_ = width or self.random_int(max=1024)
height_ = height or self.random_int(max=1024)
placeholder_url = self.random_element(self.image_p... |
Calls random. seed | def seed_instance(self, seed=None):
"""Calls random.seed"""
if self.__random == random:
# create per-instance random obj when first time seed_instance() is
# called
self.__random = random_module.Random()
self.__random.seed(seed)
return self |
This is a secure way to make a fake from another Provider. | def format(self, formatter, *args, **kwargs):
"""
This is a secure way to make a fake from another Provider.
"""
# TODO: data export?
return self.get_formatter(formatter)(*args, **kwargs) |
Perform a forward execution and perform alias analysis. Note that this analysis is fast light - weight and by no means complete. For instance most arithmetic operations are not supported. | def _alias_analysis(self, mock_sp=True, mock_bp=True):
"""
Perform a forward execution and perform alias analysis. Note that this analysis is fast, light-weight, and by no
means complete. For instance, most arithmetic operations are not supported.
- Depending on user settings, stack poi... |
Slice it! | def _slice(self):
"""
Slice it!
"""
regs = set(self._target_regs)
tmps = set(self._target_tmps)
stack_offsets = set(self._target_stack_offsets)
state = SimLightState(regs=regs, temps=tmps, stack_offsets=stack_offsets)
for stmt_idx, stmt in reversed(list... |
Prepare the address space with the data necessary to perform relocations pointing to the given symbol. | def prepare_function_symbol(self, symbol_name, basic_addr=None):
"""
Prepare the address space with the data necessary to perform relocations pointing to the given symbol.
Returns a 2-tuple. The first item is the address of the function code, the second is the address of the
relocation ... |
Set the fs register in the angr to the value of the fs register in the concrete process | def initialize_segment_register_x64(self, state, concrete_target):
"""
Set the fs register in the angr to the value of the fs register in the concrete process
:param state: state which will be modified
:param concrete_target: concrete target that will be used to read t... |
Create a GDT in the state memory and populate the segment registers. Rehook the vsyscall address using the real value in the concrete process memory | def initialize_gdt_x86(self,state,concrete_target):
"""
Create a GDT in the state memory and populate the segment registers.
Rehook the vsyscall address using the real value in the concrete process memory
:param state: state which will be modified
:param concrete_t... |
Merges this node with the other returning a new node that spans the both. | def merge(self, other):
"""
Merges this node with the other, returning a new node that spans the both.
"""
new_node = self.copy()
new_node.size += other.size
new_node.instruction_addrs += other.instruction_addrs
# FIXME: byte_string should never be none, but it is... |
Allocates a new array in memory and returns the reference to the base. | def new_array(state, element_type, size):
"""
Allocates a new array in memory and returns the reference to the base.
"""
size_bounded = SimSootExpr_NewArray._bound_array_size(state, size)
# return the reference of the array base
# => elements getting lazy initialized in t... |
Convert recovered reaching conditions from claripy ASTs to ailment Expressions | def _convert_claripy_bool_ast(self, cond):
"""
Convert recovered reaching conditions from claripy ASTs to ailment Expressions
:return: None
"""
if isinstance(cond, ailment.Expr.Expression):
return cond
if cond.op == "BoolS" and claripy.is_true(cond):
... |
Extract goto targets from a Jump or a ConditionalJump statement. | def _extract_jump_targets(stmt):
"""
Extract goto targets from a Jump or a ConditionalJump statement.
:param stmt: The statement to analyze.
:return: A list of known concrete jump targets.
:rtype: list
"""
targets = [ ]
# FIXME: We are... |
A somewhat faithful implementation of libc malloc. | def malloc(self, sim_size):
"""
A somewhat faithful implementation of libc `malloc`.
:param sim_size: the amount of memory (in bytes) to be allocated
:returns: the address of the allocation, or a NULL pointer if the allocation failed
"""
raise NotImplementedError(... |
A somewhat faithful implementation of libc free. | def free(self, ptr): #pylint:disable=unused-argument
"""
A somewhat faithful implementation of libc `free`.
:param ptr: the location in memory to be freed
"""
raise NotImplementedError("%s not implemented for %s" % (self.free.__func__.__name__,
... |
A somewhat faithful implementation of libc calloc. | def calloc(self, sim_nmemb, sim_size):
"""
A somewhat faithful implementation of libc `calloc`.
:param sim_nmemb: the number of elements to allocated
:param sim_size: the size of each element (in bytes)
:returns: the address of the allocation, or a NULL pointer if the a... |
A somewhat faithful implementation of libc realloc. | def realloc(self, ptr, size):
"""
A somewhat faithful implementation of libc `realloc`.
:param ptr: the location in memory to be reallocated
:param size: the new size desired for the allocation
:returns: the address of the allocation, or a NULL pointer if the allocation was ... |
Stack dump is a dump of the stack from gdb i. e. the result of the following gdb command: | def set_stack(self, stack_dump, stack_top):
"""
Stack dump is a dump of the stack from gdb, i.e. the result of the following gdb command :
``dump binary memory [stack_dump] [begin_addr] [end_addr]``
We set the stack to the same addresses as the gdb session to avoid pointers corruption.... |
Heap dump is a dump of the heap from gdb i. e. the result of the following gdb command: | def set_heap(self, heap_dump, heap_base):
"""
Heap dump is a dump of the heap from gdb, i.e. the result of the
following gdb command:
``dump binary memory [stack_dump] [begin] [end]``
:param heap_dump: The dump file.
:param heap_base: The start address of the heap i... |
Update any data range ( most likely use is the data segments of loaded objects ) | def set_data(self, addr, data_dump):
"""
Update any data range (most likely use is the data segments of loaded objects)
"""
data = self._read_data(data_dump)
l.info("Set data from 0x%x to %#x", addr, addr+len(data))
self._write(addr, data) |
Initialize register values within the state | def set_regs(self, regs_dump):
"""
Initialize register values within the state
:param regs_dump: The output of ``info registers`` in gdb.
"""
if self.real_stack_top == 0 and self.adjust_stack is True:
raise SimStateError("You need to set the stack first, or set"
... |
Adjust bp and sp w. r. t. stack difference between GDB session and angr. This matches sp and bp registers but there is a high risk of pointers inconsistencies. | def _adjust_regs(self):
"""
Adjust bp and sp w.r.t. stack difference between GDB session and angr.
This matches sp and bp registers, but there is a high risk of pointers inconsistencies.
"""
if not self.adjust_stack:
return
bp = self.state.arch.register_names... |
Create a Loop object for a strongly connected graph and any strongly connected subgraphs if possible. | def _parse_loop_graph(self, subg, bigg):
"""
Create a Loop object for a strongly connected graph, and any strongly
connected subgraphs, if possible.
:param subg: A strongly connected subgraph.
:param bigg: The graph which subg is a subgraph of.
:return: A l... |
Return all Loop instances that can be extracted from a graph. | def _parse_loops_from_graph(self, graph):
"""
Return all Loop instances that can be extracted from a graph.
:param graph: The graph to analyze.
:return: A list of all the Loop instances that were found in the graph.
"""
outtop = []
outall = []
f... |
Resolve the field within the given state. | def get_ref(cls, state, obj_alloc_id, field_class_name, field_name, field_type):
"""
Resolve the field within the given state.
"""
# resolve field
field_class = state.javavm_classloader.get_class(field_class_name)
field_id = resolve_field(state, field_class, field_name, f... |
: param vector_a: A list of numbers.: param vector_b: A list of numbers.: returns: The euclidean distance between the two vectors. | def _euclidean_dist(vector_a, vector_b):
"""
:param vector_a: A list of numbers.
:param vector_b: A list of numbers.
:returns: The euclidean distance between the two vectors.
"""
dist = 0
for (x, y) in zip(vector_a, vector_b):
dist += (x-y)*(x-y)
return math.sqrt(... |
: param input_attributes: First dictionary of objects to attribute tuples.: param target_attributes: Second dictionary of blocks to attribute tuples.: returns: A dictionary of objects in the input_attributes to the closest objects in the target_attributes. | def _get_closest_matches(input_attributes, target_attributes):
"""
:param input_attributes: First dictionary of objects to attribute tuples.
:param target_attributes: Second dictionary of blocks to attribute tuples.
:returns: A dictionary of objects in the input_attributes to the ... |
: param s1: A list or string: param s2: Another list or string: returns: The levenshtein distance between the two | def _levenshtein_distance(s1, s2):
"""
:param s1: A list or string
:param s2: Another list or string
:returns: The levenshtein distance between the two
"""
if len(s1) > len(s2):
s1, s2 = s2, s1
distances = range(len(s1) + 1)
for index2, num2 in enumerate(s2):
new_dis... |
This function calculates the levenshtein distance but allows for elements in the lists to be different by any number in the set acceptable_differences. | def _normalized_levenshtein_distance(s1, s2, acceptable_differences):
"""
This function calculates the levenshtein distance but allows for elements in the lists to be different by any number
in the set acceptable_differences.
:param s1: A list.
:param s2: A... |
: param x: The first element of a possible match.: param y: The second element of a possible match.: param matched_a: The current matches for the first set.: param matched_b: The current matches for the second set.: param attributes_dict_a: The attributes for each element in the first set.: param attributes_dict_b: The... | def _is_better_match(x, y, matched_a, matched_b, attributes_dict_a, attributes_dict_b):
"""
:param x: The first element of a possible match.
:param y: The second element of a possible match.
:param matched_a: The current matches for the first set.
:param... |
Compares two basic blocks and finds all the constants that differ from the first block to the second. | def differing_constants(block_a, block_b):
"""
Compares two basic blocks and finds all the constants that differ from the first block to the second.
:param block_a: The first block to compare.
:param block_b: The second block to compare.
:returns: Returns a list of differing constants in the ... |
: returns: Whether or not these two functions are identical. | def probably_identical(self):
"""
:returns: Whether or not these two functions are identical.
"""
if len(self._unmatched_blocks_from_a | self._unmatched_blocks_from_b) > 0:
return False
for (a, b) in self._block_matches:
if not self.blocks_probably_identic... |
: returns: A list of block matches which appear to be identical | def identical_blocks(self):
"""
:returns: A list of block matches which appear to be identical
"""
identical_blocks = []
for (block_a, block_b) in self._block_matches:
if self.blocks_probably_identical(block_a, block_b):
identical_blocks.append((block_... |
: returns: A list of block matches which appear to differ | def differing_blocks(self):
"""
:returns: A list of block matches which appear to differ
"""
differing_blocks = []
for (block_a, block_b) in self._block_matches:
if not self.blocks_probably_identical(block_a, block_b):
differing_blocks.append((block_a,... |
: return: A list of block matches which appear to differ | def blocks_with_differing_constants(self):
"""
:return: A list of block matches which appear to differ
"""
differing_blocks = []
diffs = dict()
for (block_a, block_b) in self._block_matches:
if self.blocks_probably_identical(block_a, block_b) and \
... |
: param block_a: The first block address.: param block_b: The second block address.: returns: The similarity of the basic blocks normalized for the base address of the block and function call addresses. | def block_similarity(self, block_a, block_b):
"""
:param block_a: The first block address.
:param block_b: The second block address.
:returns: The similarity of the basic blocks, normalized for the base address of the block and function
call addresses.
... |
: param block_a: The first block address.: param block_b: The second block address.: param check_constants: Whether or not to require matching constants in blocks.: returns: Whether or not the blocks appear to be identical. | def blocks_probably_identical(self, block_a, block_b, check_constants=False):
"""
:param block_a: The first block address.
:param block_b: The second block address.
:param check_constants: Whether or not to require matching constants in blocks.
:returns: ... |
: param function: A normalized function object.: returns: A dictionary of basic block addresses to tuples of attributes. | def _compute_block_attributes(function):
"""
:param function: A normalized function object.
:returns: A dictionary of basic block addresses to tuples of attributes.
"""
# The attributes we use are the distance form function start, distance from function exit and whet... |
: param function: A normalized Function object.: returns: A dictionary of basic block addresses and their distance to the exit of the function. | def _distances_from_function_exit(function):
"""
:param function: A normalized Function object.
:returns: A dictionary of basic block addresses and their distance to the exit of the function.
"""
reverse_graph = function.graph.reverse()
# we aren't guaranteed... |
Computes the diff of the functions and saves the result. | def _compute_diff(self):
"""
Computes the diff of the functions and saves the result.
"""
# get the attributes for all blocks
l.debug("Computing diff of functions: %s, %s",
("%#x" % self._function_a.startpoint.addr) if self._function_a.startpoint is not None else ... |
: param attributes_a: A dict of blocks to their attributes: param attributes_b: A dict of blocks to their attributes | def _get_block_matches(self, attributes_a, attributes_b, filter_set_a=None, filter_set_b=None, delta=(0, 0, 0),
tiebreak_with_block_similarity=False):
"""
:param attributes_a: A dict of blocks to their attributes
:param attributes_b: A dict of blocks to their att... |
Compare two functions and return True if they appear identical. | def functions_probably_identical(self, func_a_addr, func_b_addr, check_consts=False):
"""
Compare two functions and return True if they appear identical.
:param func_a_addr: The address of the first function (in the first binary).
:param func_b_addr: The address of the second function (... |
: returns: A list of function matches that appear to be identical | def identical_functions(self):
"""
:returns: A list of function matches that appear to be identical
"""
identical_funcs = []
for (func_a, func_b) in self.function_matches:
if self.functions_probably_identical(func_a, func_b):
identical_funcs.append((fu... |
: returns: A list of function matches that appear to differ | def differing_functions(self):
"""
:returns: A list of function matches that appear to differ
"""
different_funcs = []
for (func_a, func_b) in self.function_matches:
if not self.functions_probably_identical(func_a, func_b):
different_funcs.append((func... |
: return: A list of function matches that appear to differ including just by constants | def differing_functions_with_consts(self):
"""
:return: A list of function matches that appear to differ including just by constants
"""
different_funcs = []
for (func_a, func_b) in self.function_matches:
if not self.functions_probably_identical(func_a, func_b, check_... |
: returns: A list of block matches that appear to differ | def differing_blocks(self):
"""
:returns: A list of block matches that appear to differ
"""
differing_blocks = []
for (func_a, func_b) in self.function_matches:
differing_blocks.extend(self.get_function_diff(func_a, func_b).differing_blocks)
return differing_b... |
: return A list of all block matches that appear to be identical | def identical_blocks(self):
"""
:return A list of all block matches that appear to be identical
"""
identical_blocks = []
for (func_a, func_b) in self.function_matches:
identical_blocks.extend(self.get_function_diff(func_a, func_b).identical_blocks)
return ide... |
: return: A dict of block matches with differing constants to the tuple of constants | def blocks_with_differing_constants(self):
"""
:return: A dict of block matches with differing constants to the tuple of constants
"""
diffs = dict()
for (func_a, func_b) in self.function_matches:
diffs.update(self.get_function_diff(func_a, func_b).blocks_with_differi... |
: param function_addr_a: The address of the first function ( in the first binary ): param function_addr_b: The address of the second function ( in the second binary ): returns: the FunctionDiff of the two functions | def get_function_diff(self, function_addr_a, function_addr_b):
"""
:param function_addr_a: The address of the first function (in the first binary)
:param function_addr_b: The address of the second function (in the second binary)
:returns: the FunctionDiff of the two functions
"""... |
: param cfg: An angr CFG object: returns: a dictionary of function addresses to tuples of attributes | def _compute_function_attributes(cfg):
"""
:param cfg: An angr CFG object
:returns: a dictionary of function addresses to tuples of attributes
"""
# the attributes we use are the number of basic blocks, number of edges, and number of subfunction calls
attributes = dict... |
: param attributes_a: A dict of functions to their attributes: param attributes_b: A dict of functions to their attributes | def _get_function_matches(attributes_a, attributes_b, filter_set_a=None, filter_set_b=None):
"""
:param attributes_a: A dict of functions to their attributes
:param attributes_b: A dict of functions to their attributes
The following parameters are optional.
:param filter_... |
Load a new project based on a string of raw bytecode. | def load_shellcode(shellcode, arch, start_offset=0, load_address=0):
"""
Load a new project based on a string of raw bytecode.
:param shellcode: The data to load
:param arch: The name of the arch to use, or an archinfo class
:param start_offset: The offset into the data to start... |
This scans through an objects imports and hooks them with simprocedures from our library whenever possible | def _register_object(self, obj, sim_proc_arch):
"""
This scans through an objects imports and hooks them with simprocedures from our library whenever possible
"""
# Step 1: get the set of libraries we are allowed to use to resolve unresolved symbols
missing_libs = []
for... |
Does symbol name f exist as a SIM_PROCEDURE? If so return it else return None. Narrows down the set of libraries to search based on hint. Part of the hack to enable Binary Ninja support. Remove if _register_objects () stops using it. | def _guess_simprocedure(self, f, hint):
"""
Does symbol name `f` exist as a SIM_PROCEDURE? If so, return it, else return None.
Narrows down the set of libraries to search based on hint.
Part of the hack to enable Binary Ninja support. Remove if _register_objects() stops using it.
... |
Has symbol name f been marked for exclusion by any of the user parameters? | def _check_user_blacklists(self, f):
"""
Has symbol name `f` been marked for exclusion by any of the user
parameters?
"""
return not self._should_use_sim_procedures or \
f in self._exclude_sim_procedures_list or \
f in self._ignore_functions or \
... |
Hook a section of code with a custom function. This is used internally to provide symbolic summaries of library functions and can be used to instrument execution or to modify control flow. | def hook(self, addr, hook=None, length=0, kwargs=None, replace=False):
"""
Hook a section of code with a custom function. This is used internally to provide symbolic
summaries of library functions, and can be used to instrument execution or to modify
control flow.
When hook is n... |
Returns the current hook for addr. | def hooked_by(self, addr):
"""
Returns the current hook for `addr`.
:param addr: An address.
:returns: None if the address is not hooked.
"""
if not self.is_hooked(addr):
l.warning("Address %s is not hooked", self._addr_to_str(addr))
return N... |
Remove a hook. | def unhook(self, addr):
"""
Remove a hook.
:param addr: The address of the hook.
"""
if not self.is_hooked(addr):
l.warning("Address %s not hooked", self._addr_to_str(addr))
return
del self._sim_procedures[addr] |
Resolve a dependency in a binary. Looks up the address of the given symbol and then hooks that address. If the symbol was not available in the loaded libraries this address may be provided by the CLE externs object. | def hook_symbol(self, symbol_name, simproc, kwargs=None, replace=None):
"""
Resolve a dependency in a binary. Looks up the address of the given symbol, and then hooks that
address. If the symbol was not available in the loaded libraries, this address may be provided
by the CLE externs ob... |
Check if a symbol is already hooked. | def is_symbol_hooked(self, symbol_name):
"""
Check if a symbol is already hooked.
:param str symbol_name: Name of the symbol.
:return: True if the symbol can be resolved and is hooked, False otherwise.
:rtype: bool
"""
sym = self.loader.find_symbol(symbol_name)
... |
Remove the hook on a symbol. This function will fail if the symbol is provided by the extern object as that would result in a state where analysis would be unable to cope with a call to this symbol. | def unhook_symbol(self, symbol_name):
"""
Remove the hook on a symbol.
This function will fail if the symbol is provided by the extern object, as that would result in a state where
analysis would be unable to cope with a call to this symbol.
"""
sym = self.loader.find_sym... |
Move the hook for a symbol to a specific address: param new_address: the new address that will trigger the SimProc execution: param symbol_name: the name of the symbol ( f. i. strcmp ): return: None | def rehook_symbol(self, new_address, symbol_name):
"""
Move the hook for a symbol to a specific address
:param new_address: the new address that will trigger the SimProc execution
:param symbol_name: the name of the symbol (f.i. strcmp )
:return: None
"""
new_sim_... |
This function is a symbolic execution helper in the simple style supported by triton and manticore. It designed to be run after setting up hooks ( see Project. hook ) in which the symbolic state can be checked. | def execute(self, *args, **kwargs):
"""
This function is a symbolic execution helper in the simple style
supported by triton and manticore. It designed to be run after
setting up hooks (see Project.hook), in which the symbolic state
can be checked.
This function can be r... |
Return a function decorator that allows easy hooking. Please refer to hook () for its usage. | def _hook_decorator(self, addr, length=0, kwargs=None):
"""
Return a function decorator that allows easy hooking. Please refer to hook() for its usage.
:return: The function decorator.
"""
def hook_decorator(func):
self.hook(addr, func, length=length, kwargs=kwargs)... |
Indicates if the project s main binary is a Java Archive. | def is_java_project(self):
"""
Indicates if the project's main binary is a Java Archive.
"""
if self._is_java_project is None:
self._is_java_project = isinstance(self.arch, ArchSoot)
return self._is_java_project |
Indicates if the project s main binary is a Java Archive which interacts during its execution with native libraries ( via JNI ). | def is_java_jni_project(self):
"""
Indicates if the project's main binary is a Java Archive, which
interacts during its execution with native libraries (via JNI).
"""
if self._is_java_jni_project is None:
self._is_java_jni_project = isinstance(self.arch, ArchSoot) and... |
Register a preset instance with the class of the hub it corresponds to. This allows individual plugin objects to automatically register themselves with a preset by using a classmethod of their own with only the name of the preset to register with. | def register_preset(cls, name, preset):
"""
Register a preset instance with the class of the hub it corresponds to. This allows individual plugin objects to
automatically register themselves with a preset by using a classmethod of their own with only the name of the
preset to register wi... |
Apply a preset to the hub. If there was a previously active preset discard it. | def use_plugin_preset(self, preset):
"""
Apply a preset to the hub. If there was a previously active preset, discard it.
Preset can be either the string name of a preset or a PluginPreset instance.
"""
if isinstance(preset, str):
try:
preset = self._p... |
Discard the current active preset. Will release any active plugins that could have come from the old preset. | def discard_plugin_preset(self):
"""
Discard the current active preset. Will release any active plugins that could have come from the old preset.
"""
if self.has_plugin_preset:
for name, plugin in list(self._active_plugins.items()):
if id(plugin) in self._prov... |
Get the plugin named name. If no such plugin is currently active try to activate a new one using the current preset. | def get_plugin(self, name):
"""
Get the plugin named ``name``. If no such plugin is currently active, try to activate a new
one using the current preset.
"""
if name in self._active_plugins:
return self._active_plugins[name]
elif self.has_plugin_preset:
... |
Add a new plugin plugin with name name to the active plugins. | def register_plugin(self, name, plugin):
"""
Add a new plugin ``plugin`` with name ``name`` to the active plugins.
"""
if self.has_plugin(name):
self.release_plugin(name)
self._active_plugins[name] = plugin
setattr(self, name, plugin)
return plugin |
Deactivate and remove the plugin with name name. | def release_plugin(self, name):
"""
Deactivate and remove the plugin with name ``name``.
"""
plugin = self._active_plugins[name]
if id(plugin) in self._provided_by_preset:
self._provided_by_preset.remove(id(plugin))
del self._active_plugins[name]
dela... |
Return a copy of self. | def copy(self):
"""
Return a copy of self.
"""
cls = self.__class__
result = cls.__new__(cls)
result._default_plugins = dict(self._default_plugins) # pylint:disable=protected-access
return result |
Grabs the concretized result so we can add the constraint ourselves. | def _grab_concretization_results(cls, state):
"""
Grabs the concretized result so we can add the constraint ourselves.
"""
# only grab ones that match the constrained addrs
if cls._should_add_constraints(state):
addr = state.inspect.address_concretization_expr
... |
Check to see if the current address concretization variable is any of the registered constrained_addrs we want to allow concretization for | def _should_add_constraints(cls, state):
"""
Check to see if the current address concretization variable is any of the registered
constrained_addrs we want to allow concretization for
"""
expr = state.inspect.address_concretization_expr
hit_indices = cls._to_indices(state... |
The actual allocation primitive for this heap implementation. Increases the position of the break to allocate space. Has no guards against the heap growing too large. | def allocate(self, sim_size):
"""
The actual allocation primitive for this heap implementation. Increases the position of the break to allocate
space. Has no guards against the heap growing too large.
:param sim_size: a size specifying how much to increase the break pointer by
:... |
The memory release primitive for this heap implementation. Decreases the position of the break to deallocate space. Guards against releasing beyond the initial heap base. | def release(self, sim_size):
"""
The memory release primitive for this heap implementation. Decreases the position of the break to deallocate
space. Guards against releasing beyond the initial heap base.
:param sim_size: a size specifying how much to decrease the break pointer by (may b... |
Get the function name from a C - style function declaration string. | def get_function_name(s):
"""
Get the function name from a C-style function declaration string.
:param str s: A C-style function declaration string.
:return: The function name.
:rtype: str
"""
s = s.strip()
if s.startswith("__attribute__"):
# Remove "__attribute__ ((... |
Convert a C - style function declaration string to its corresponding SimTypes - based Python representation. | def convert_cproto_to_py(c_decl):
"""
Convert a C-style function declaration string to its corresponding SimTypes-based Python representation.
:param str c_decl: The C-style function declaration string.
:return: A tuple of the function name, the prototype, and a stri... |
Use this to set the size on a chunk. When the chunk is new ( such as when a free chunk is shrunk to form an allocated chunk and a remainder free chunk ) it is recommended that the is_free hint be used since setting the size depends on the chunk s freeness and vice versa. | def set_size(self, size, is_free=None): #pylint:disable=arguments-differ
"""
Use this to set the size on a chunk. When the chunk is new (such as when a free chunk is shrunk to form an
allocated chunk and a remainder free chunk) it is recommended that the is_free hint be used since setting the
... |
Sets ( or unsets ) the flag controlling whether the previous chunk is free. | def set_prev_freeness(self, is_free):
"""
Sets (or unsets) the flag controlling whether the previous chunk is free.
:param is_free: if True, sets the previous chunk to be free; if False, sets it to be allocated
"""
level = silence_logger()
size_field = self.state.memory.... |
Returns a concrete state of the flag indicating whether the previous chunk is free or not. Issues a warning if that flag is symbolic and has multiple solutions and then assumes that the previous chunk is free. | def is_prev_free(self):
"""
Returns a concrete state of the flag indicating whether the previous chunk is free or not. Issues a warning if
that flag is symbolic and has multiple solutions, and then assumes that the previous chunk is free.
:returns: True if the previous chunk is free; Fa... |
Returns the size of the previous chunk masking off what would be the flag bits if it were in the actual size field. Performs NO CHECKING to determine whether the previous chunk size is valid ( for example when the previous chunk is not free its size cannot be determined ). | def prev_size(self):
"""
Returns the size of the previous chunk, masking off what would be the flag bits if it were in the actual size
field. Performs NO CHECKING to determine whether the previous chunk size is valid (for example, when the
previous chunk is not free, its size cannot be d... |
Returns the chunk immediately following ( and adjacent to ) this one if it exists. | def next_chunk(self):
"""
Returns the chunk immediately following (and adjacent to) this one, if it exists.
:returns: The following chunk, or None if applicable
"""
def sym_base_handler(base):
l.warning("A computed chunk base is symbolic; maximizing it")
... |
Returns the chunk immediately prior ( and adjacent ) to this one if that chunk is free. If the prior chunk is not free then its base cannot be located and this method raises an error. | def prev_chunk(self):
"""
Returns the chunk immediately prior (and adjacent) to this one, if that chunk is free. If the prior chunk is not
free, then its base cannot be located and this method raises an error.
:returns: If possible, the previous chunk; otherwise, raises an error
... |
Returns the chunk following this chunk in the list of free chunks. If this chunk is not free then it resides in no such list and this method raises an error. | def fwd_chunk(self):
"""
Returns the chunk following this chunk in the list of free chunks. If this chunk is not free, then it resides in
no such list and this method raises an error.
:returns: If possible, the forward chunk; otherwise, raises an error
"""
if self.is_fre... |
Given a pointer to a user payload return the base of the chunk associated with that payload ( i. e. the chunk pointer ). Returns None if ptr is null. | def chunk_from_mem(self, ptr):
"""
Given a pointer to a user payload, return the base of the chunk associated with that payload (i.e. the chunk
pointer). Returns None if ptr is null.
:param ptr: a pointer to the base of a user payload in the heap
:returns: a pointer to the base ... |
Simply finds the free chunk that would be the backwards chunk relative to the chunk at ptr. Hence the free head and all other metadata are unaltered by this function. | def _find_bck(self, chunk):
"""
Simply finds the free chunk that would be the backwards chunk relative to the chunk at ptr. Hence, the free head
and all other metadata are unaltered by this function.
"""
cur = self.free_head_chunk
if cur is None:
return None
... |
Sets the freedom of the final chunk. Since no proper chunk follows the final chunk the heap itself manages this. Nonetheless for now it is implemented as if an additional chunk followed the final chunk. | def _set_final_freeness(self, flag):
"""
Sets the freedom of the final chunk. Since no proper chunk follows the final chunk, the heap itself manages
this. Nonetheless, for now it is implemented as if an additional chunk followed the final chunk.
"""
if flag:
self.stat... |
Takes an allocation size as requested by the user and modifies it to be a suitable chunk size. | def _make_chunk_size(self, req_size):
"""
Takes an allocation size as requested by the user and modifies it to be a suitable chunk size.
"""
size = req_size
size += 2 * self._chunk_size_t_size # Two size fields
size = self._chunk_min_size if size < self._chunk_min_size e... |
Allocate and initialize a new string in the context of the state passed. | def new_string(state, value):
"""
Allocate and initialize a new string in the context of the state passed.
The method returns the reference to the newly allocated string
:param state: angr state where we want to allocate the string
:type SimState
:param value: value of ... |
: param s: the string address/ offset: param state: SimState: param region: memory file etc: param base: the base to use to interpret the number note: all numbers may start with +/ - and base 16 may start with 0x: param signed: boolean true means the result will be signed otherwise unsigned: param read_length: int the ... | def strtol_inner(s, state, region, base, signed, read_length=None):
"""
:param s: the string address/offset
:param state: SimState
:param region: memory, file, etc
:param base: the base to use to interpret the number
note: all numbers may start with +/- and base 16 may st... |
loads a number from addr and returns a condition that addr must start with the prefix | def _load_num_with_prefix(prefix, addr, region, state, base, signed, read_length=None):
"""
loads a number from addr, and returns a condition that addr must start with the prefix
"""
length = len(prefix)
read_length = (read_length-length) if read_length else None
conditio... |
reads values from s and generates the symbolic number that it would equal the first char is either a number in the given base or the result is 0 expression indicates whether or not it was successful | def _string_to_int(s, state, region, base, signed, read_length=None):
"""
reads values from s and generates the symbolic number that it would equal
the first char is either a number in the given base, or the result is 0
expression indicates whether or not it was successful
"""
... |
converts a symbolic char to a number in the given base returns expression result expression is a symbolic boolean indicating whether or not it was a valid number result is the value | def _char_to_val(char, base):
"""
converts a symbolic char to a number in the given base
returns expression, result
expression is a symbolic boolean indicating whether or not it was a valid number
result is the value
"""
cases = []
# 0-9
max_digit ... |
Implement printf - based on the stored format specifier information format the values from the arg getter function args into a string. | def replace(self, startpos, args):
"""
Implement printf - based on the stored format specifier information, format the values from the arg getter function `args` into a string.
:param startpos: The index of the first argument to be used by the first element of the format string
:... |
implement scanf - extract formatted data from memory or a file according to the stored format specifiers and store them into the pointers extracted from args. | def interpret(self, startpos, args, addr=None, simfd=None):
"""
implement scanf - extract formatted data from memory or a file according to the stored format
specifiers and store them into the pointers extracted from `args`.
:param startpos: The index of the first argument correspond... |
Modified length specifiers: mapping between length modifiers and conversion specifiers. This generates all the possibilities i. e. hhd etc. | def _mod_spec(self):
"""
Modified length specifiers: mapping between length modifiers and conversion specifiers. This generates all the
possibilities, i.e. hhd, etc.
"""
mod_spec={}
for mod, sizes in self.int_len_mod.items():
for conv in self.int_sign['signe... |
All specifiers and their lengths. | def _all_spec(self):
"""
All specifiers and their lengths.
"""
base = self._mod_spec
for spec in self.basic_spec:
base[spec] = self.basic_spec[spec]
return base |
match the string nugget to a format specifier. | def _match_spec(self, nugget):
"""
match the string `nugget` to a format specifier.
"""
# TODO: handle positional modifiers and other similar format string tricks.
all_spec = self._all_spec
# iterate through nugget throwing away anything which is an int
# TODO st... |
Extract the actual formats from the format string fmt. | def _get_fmt(self, fmt):
"""
Extract the actual formats from the format string `fmt`.
:param list fmt: A list of format chars.
:returns: a FormatString object
"""
# iterate over the format string looking for format specifiers
components = [ ]
i = 0
... |
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