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author | monster <[email protected]> | 2022-07-07 14:41:37 +0300 |
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committer | monster <[email protected]> | 2022-07-07 14:41:37 +0300 |
commit | 06e5c21a835c0e923506c4ff27929f34e00761c2 (patch) | |
tree | 75efcbc6854ef9bd476eb8bf00cc5c900da436a2 /contrib/tools/python3/src/Lib/dis.py | |
parent | 03f024c4412e3aa613bb543cf1660176320ba8f4 (diff) |
fix ya.make
Diffstat (limited to 'contrib/tools/python3/src/Lib/dis.py')
-rw-r--r-- | contrib/tools/python3/src/Lib/dis.py | 540 |
1 files changed, 0 insertions, 540 deletions
diff --git a/contrib/tools/python3/src/Lib/dis.py b/contrib/tools/python3/src/Lib/dis.py deleted file mode 100644 index fe5d24e8805..00000000000 --- a/contrib/tools/python3/src/Lib/dis.py +++ /dev/null @@ -1,540 +0,0 @@ -"""Disassembler of Python byte code into mnemonics.""" - -import sys -import types -import collections -import io - -from opcode import * -from opcode import __all__ as _opcodes_all - -__all__ = ["code_info", "dis", "disassemble", "distb", "disco", - "findlinestarts", "findlabels", "show_code", - "get_instructions", "Instruction", "Bytecode"] + _opcodes_all -del _opcodes_all - -_have_code = (types.MethodType, types.FunctionType, types.CodeType, - classmethod, staticmethod, type) - -FORMAT_VALUE = opmap['FORMAT_VALUE'] -FORMAT_VALUE_CONVERTERS = ( - (None, ''), - (str, 'str'), - (repr, 'repr'), - (ascii, 'ascii'), -) -MAKE_FUNCTION = opmap['MAKE_FUNCTION'] -MAKE_FUNCTION_FLAGS = ('defaults', 'kwdefaults', 'annotations', 'closure') - - -def _try_compile(source, name): - """Attempts to compile the given source, first as an expression and - then as a statement if the first approach fails. - - Utility function to accept strings in functions that otherwise - expect code objects - """ - try: - c = compile(source, name, 'eval') - except SyntaxError: - c = compile(source, name, 'exec') - return c - -def dis(x=None, *, file=None, depth=None): - """Disassemble classes, methods, functions, and other compiled objects. - - With no argument, disassemble the last traceback. - - Compiled objects currently include generator objects, async generator - objects, and coroutine objects, all of which store their code object - in a special attribute. - """ - if x is None: - distb(file=file) - return - # Extract functions from methods. - if hasattr(x, '__func__'): - x = x.__func__ - # Extract compiled code objects from... - if hasattr(x, '__code__'): # ...a function, or - x = x.__code__ - elif hasattr(x, 'gi_code'): #...a generator object, or - x = x.gi_code - elif hasattr(x, 'ag_code'): #...an asynchronous generator object, or - x = x.ag_code - elif hasattr(x, 'cr_code'): #...a coroutine. - x = x.cr_code - # Perform the disassembly. - if hasattr(x, '__dict__'): # Class or module - items = sorted(x.__dict__.items()) - for name, x1 in items: - if isinstance(x1, _have_code): - print("Disassembly of %s:" % name, file=file) - try: - dis(x1, file=file, depth=depth) - except TypeError as msg: - print("Sorry:", msg, file=file) - print(file=file) - elif hasattr(x, 'co_code'): # Code object - _disassemble_recursive(x, file=file, depth=depth) - elif isinstance(x, (bytes, bytearray)): # Raw bytecode - _disassemble_bytes(x, file=file) - elif isinstance(x, str): # Source code - _disassemble_str(x, file=file, depth=depth) - else: - raise TypeError("don't know how to disassemble %s objects" % - type(x).__name__) - -def distb(tb=None, *, file=None): - """Disassemble a traceback (default: last traceback).""" - if tb is None: - try: - tb = sys.last_traceback - except AttributeError: - raise RuntimeError("no last traceback to disassemble") from None - while tb.tb_next: tb = tb.tb_next - disassemble(tb.tb_frame.f_code, tb.tb_lasti, file=file) - -# The inspect module interrogates this dictionary to build its -# list of CO_* constants. It is also used by pretty_flags to -# turn the co_flags field into a human readable list. -COMPILER_FLAG_NAMES = { - 1: "OPTIMIZED", - 2: "NEWLOCALS", - 4: "VARARGS", - 8: "VARKEYWORDS", - 16: "NESTED", - 32: "GENERATOR", - 64: "NOFREE", - 128: "COROUTINE", - 256: "ITERABLE_COROUTINE", - 512: "ASYNC_GENERATOR", -} - -def pretty_flags(flags): - """Return pretty representation of code flags.""" - names = [] - for i in range(32): - flag = 1<<i - if flags & flag: - names.append(COMPILER_FLAG_NAMES.get(flag, hex(flag))) - flags ^= flag - if not flags: - break - else: - names.append(hex(flags)) - return ", ".join(names) - -def _get_code_object(x): - """Helper to handle methods, compiled or raw code objects, and strings.""" - # Extract functions from methods. - if hasattr(x, '__func__'): - x = x.__func__ - # Extract compiled code objects from... - if hasattr(x, '__code__'): # ...a function, or - x = x.__code__ - elif hasattr(x, 'gi_code'): #...a generator object, or - x = x.gi_code - elif hasattr(x, 'ag_code'): #...an asynchronous generator object, or - x = x.ag_code - elif hasattr(x, 'cr_code'): #...a coroutine. - x = x.cr_code - # Handle source code. - if isinstance(x, str): - x = _try_compile(x, "<disassembly>") - # By now, if we don't have a code object, we can't disassemble x. - if hasattr(x, 'co_code'): - return x - raise TypeError("don't know how to disassemble %s objects" % - type(x).__name__) - -def code_info(x): - """Formatted details of methods, functions, or code.""" - return _format_code_info(_get_code_object(x)) - -def _format_code_info(co): - lines = [] - lines.append("Name: %s" % co.co_name) - lines.append("Filename: %s" % co.co_filename) - lines.append("Argument count: %s" % co.co_argcount) - lines.append("Positional-only arguments: %s" % co.co_posonlyargcount) - lines.append("Kw-only arguments: %s" % co.co_kwonlyargcount) - lines.append("Number of locals: %s" % co.co_nlocals) - lines.append("Stack size: %s" % co.co_stacksize) - lines.append("Flags: %s" % pretty_flags(co.co_flags)) - if co.co_consts: - lines.append("Constants:") - for i_c in enumerate(co.co_consts): - lines.append("%4d: %r" % i_c) - if co.co_names: - lines.append("Names:") - for i_n in enumerate(co.co_names): - lines.append("%4d: %s" % i_n) - if co.co_varnames: - lines.append("Variable names:") - for i_n in enumerate(co.co_varnames): - lines.append("%4d: %s" % i_n) - if co.co_freevars: - lines.append("Free variables:") - for i_n in enumerate(co.co_freevars): - lines.append("%4d: %s" % i_n) - if co.co_cellvars: - lines.append("Cell variables:") - for i_n in enumerate(co.co_cellvars): - lines.append("%4d: %s" % i_n) - return "\n".join(lines) - -def show_code(co, *, file=None): - """Print details of methods, functions, or code to *file*. - - If *file* is not provided, the output is printed on stdout. - """ - print(code_info(co), file=file) - -_Instruction = collections.namedtuple("_Instruction", - "opname opcode arg argval argrepr offset starts_line is_jump_target") - -_Instruction.opname.__doc__ = "Human readable name for operation" -_Instruction.opcode.__doc__ = "Numeric code for operation" -_Instruction.arg.__doc__ = "Numeric argument to operation (if any), otherwise None" -_Instruction.argval.__doc__ = "Resolved arg value (if known), otherwise same as arg" -_Instruction.argrepr.__doc__ = "Human readable description of operation argument" -_Instruction.offset.__doc__ = "Start index of operation within bytecode sequence" -_Instruction.starts_line.__doc__ = "Line started by this opcode (if any), otherwise None" -_Instruction.is_jump_target.__doc__ = "True if other code jumps to here, otherwise False" - -_OPNAME_WIDTH = 20 -_OPARG_WIDTH = 5 - -class Instruction(_Instruction): - """Details for a bytecode operation - - Defined fields: - opname - human readable name for operation - opcode - numeric code for operation - arg - numeric argument to operation (if any), otherwise None - argval - resolved arg value (if known), otherwise same as arg - argrepr - human readable description of operation argument - offset - start index of operation within bytecode sequence - starts_line - line started by this opcode (if any), otherwise None - is_jump_target - True if other code jumps to here, otherwise False - """ - - def _disassemble(self, lineno_width=3, mark_as_current=False, offset_width=4): - """Format instruction details for inclusion in disassembly output - - *lineno_width* sets the width of the line number field (0 omits it) - *mark_as_current* inserts a '-->' marker arrow as part of the line - *offset_width* sets the width of the instruction offset field - """ - fields = [] - # Column: Source code line number - if lineno_width: - if self.starts_line is not None: - lineno_fmt = "%%%dd" % lineno_width - fields.append(lineno_fmt % self.starts_line) - else: - fields.append(' ' * lineno_width) - # Column: Current instruction indicator - if mark_as_current: - fields.append('-->') - else: - fields.append(' ') - # Column: Jump target marker - if self.is_jump_target: - fields.append('>>') - else: - fields.append(' ') - # Column: Instruction offset from start of code sequence - fields.append(repr(self.offset).rjust(offset_width)) - # Column: Opcode name - fields.append(self.opname.ljust(_OPNAME_WIDTH)) - # Column: Opcode argument - if self.arg is not None: - fields.append(repr(self.arg).rjust(_OPARG_WIDTH)) - # Column: Opcode argument details - if self.argrepr: - fields.append('(' + self.argrepr + ')') - return ' '.join(fields).rstrip() - - -def get_instructions(x, *, first_line=None): - """Iterator for the opcodes in methods, functions or code - - Generates a series of Instruction named tuples giving the details of - each operations in the supplied code. - - If *first_line* is not None, it indicates the line number that should - be reported for the first source line in the disassembled code. - Otherwise, the source line information (if any) is taken directly from - the disassembled code object. - """ - co = _get_code_object(x) - cell_names = co.co_cellvars + co.co_freevars - linestarts = dict(findlinestarts(co)) - if first_line is not None: - line_offset = first_line - co.co_firstlineno - else: - line_offset = 0 - return _get_instructions_bytes(co.co_code, co.co_varnames, co.co_names, - co.co_consts, cell_names, linestarts, - line_offset) - -def _get_const_info(const_index, const_list): - """Helper to get optional details about const references - - Returns the dereferenced constant and its repr if the constant - list is defined. - Otherwise returns the constant index and its repr(). - """ - argval = const_index - if const_list is not None: - argval = const_list[const_index] - return argval, repr(argval) - -def _get_name_info(name_index, name_list): - """Helper to get optional details about named references - - Returns the dereferenced name as both value and repr if the name - list is defined. - Otherwise returns the name index and its repr(). - """ - argval = name_index - if name_list is not None: - argval = name_list[name_index] - argrepr = argval - else: - argrepr = repr(argval) - return argval, argrepr - - -def _get_instructions_bytes(code, varnames=None, names=None, constants=None, - cells=None, linestarts=None, line_offset=0): - """Iterate over the instructions in a bytecode string. - - Generates a sequence of Instruction namedtuples giving the details of each - opcode. Additional information about the code's runtime environment - (e.g. variable names, constants) can be specified using optional - arguments. - - """ - labels = findlabels(code) - starts_line = None - for offset, op, arg in _unpack_opargs(code): - if linestarts is not None: - starts_line = linestarts.get(offset, None) - if starts_line is not None: - starts_line += line_offset - is_jump_target = offset in labels - argval = None - argrepr = '' - if arg is not None: - # Set argval to the dereferenced value of the argument when - # available, and argrepr to the string representation of argval. - # _disassemble_bytes needs the string repr of the - # raw name index for LOAD_GLOBAL, LOAD_CONST, etc. - argval = arg - if op in hasconst: - argval, argrepr = _get_const_info(arg, constants) - elif op in hasname: - argval, argrepr = _get_name_info(arg, names) - elif op in hasjabs: - argval = arg*2 - argrepr = "to " + repr(argval) - elif op in hasjrel: - argval = offset + 2 + arg*2 - argrepr = "to " + repr(argval) - elif op in haslocal: - argval, argrepr = _get_name_info(arg, varnames) - elif op in hascompare: - argval = cmp_op[arg] - argrepr = argval - elif op in hasfree: - argval, argrepr = _get_name_info(arg, cells) - elif op == FORMAT_VALUE: - argval, argrepr = FORMAT_VALUE_CONVERTERS[arg & 0x3] - argval = (argval, bool(arg & 0x4)) - if argval[1]: - if argrepr: - argrepr += ', ' - argrepr += 'with format' - elif op == MAKE_FUNCTION: - argrepr = ', '.join(s for i, s in enumerate(MAKE_FUNCTION_FLAGS) - if arg & (1<<i)) - yield Instruction(opname[op], op, - arg, argval, argrepr, - offset, starts_line, is_jump_target) - -def disassemble(co, lasti=-1, *, file=None): - """Disassemble a code object.""" - cell_names = co.co_cellvars + co.co_freevars - linestarts = dict(findlinestarts(co)) - _disassemble_bytes(co.co_code, lasti, co.co_varnames, co.co_names, - co.co_consts, cell_names, linestarts, file=file) - -def _disassemble_recursive(co, *, file=None, depth=None): - disassemble(co, file=file) - if depth is None or depth > 0: - if depth is not None: - depth = depth - 1 - for x in co.co_consts: - if hasattr(x, 'co_code'): - print(file=file) - print("Disassembly of %r:" % (x,), file=file) - _disassemble_recursive(x, file=file, depth=depth) - -def _disassemble_bytes(code, lasti=-1, varnames=None, names=None, - constants=None, cells=None, linestarts=None, - *, file=None, line_offset=0): - # Omit the line number column entirely if we have no line number info - show_lineno = bool(linestarts) - if show_lineno: - maxlineno = max(linestarts.values()) + line_offset - if maxlineno >= 1000: - lineno_width = len(str(maxlineno)) - else: - lineno_width = 3 - else: - lineno_width = 0 - maxoffset = len(code) - 2 - if maxoffset >= 10000: - offset_width = len(str(maxoffset)) - else: - offset_width = 4 - for instr in _get_instructions_bytes(code, varnames, names, - constants, cells, linestarts, - line_offset=line_offset): - new_source_line = (show_lineno and - instr.starts_line is not None and - instr.offset > 0) - if new_source_line: - print(file=file) - is_current_instr = instr.offset == lasti - print(instr._disassemble(lineno_width, is_current_instr, offset_width), - file=file) - -def _disassemble_str(source, **kwargs): - """Compile the source string, then disassemble the code object.""" - _disassemble_recursive(_try_compile(source, '<dis>'), **kwargs) - -disco = disassemble # XXX For backwards compatibility - -def _unpack_opargs(code): - extended_arg = 0 - for i in range(0, len(code), 2): - op = code[i] - if op >= HAVE_ARGUMENT: - arg = code[i+1] | extended_arg - extended_arg = (arg << 8) if op == EXTENDED_ARG else 0 - else: - arg = None - extended_arg = 0 - yield (i, op, arg) - -def findlabels(code): - """Detect all offsets in a byte code which are jump targets. - - Return the list of offsets. - - """ - labels = [] - for offset, op, arg in _unpack_opargs(code): - if arg is not None: - if op in hasjrel: - label = offset + 2 + arg*2 - elif op in hasjabs: - label = arg*2 - else: - continue - if label not in labels: - labels.append(label) - return labels - -def findlinestarts(code): - """Find the offsets in a byte code which are start of lines in the source. - - Generate pairs (offset, lineno) - """ - lastline = None - for start, end, line in code.co_lines(): - if line is not None and line != lastline: - lastline = line - yield start, line - return - - -class Bytecode: - """The bytecode operations of a piece of code - - Instantiate this with a function, method, other compiled object, string of - code, or a code object (as returned by compile()). - - Iterating over this yields the bytecode operations as Instruction instances. - """ - def __init__(self, x, *, first_line=None, current_offset=None): - self.codeobj = co = _get_code_object(x) - if first_line is None: - self.first_line = co.co_firstlineno - self._line_offset = 0 - else: - self.first_line = first_line - self._line_offset = first_line - co.co_firstlineno - self._cell_names = co.co_cellvars + co.co_freevars - self._linestarts = dict(findlinestarts(co)) - self._original_object = x - self.current_offset = current_offset - - def __iter__(self): - co = self.codeobj - return _get_instructions_bytes(co.co_code, co.co_varnames, co.co_names, - co.co_consts, self._cell_names, - self._linestarts, - line_offset=self._line_offset) - - def __repr__(self): - return "{}({!r})".format(self.__class__.__name__, - self._original_object) - - @classmethod - def from_traceback(cls, tb): - """ Construct a Bytecode from the given traceback """ - while tb.tb_next: - tb = tb.tb_next - return cls(tb.tb_frame.f_code, current_offset=tb.tb_lasti) - - def info(self): - """Return formatted information about the code object.""" - return _format_code_info(self.codeobj) - - def dis(self): - """Return a formatted view of the bytecode operations.""" - co = self.codeobj - if self.current_offset is not None: - offset = self.current_offset - else: - offset = -1 - with io.StringIO() as output: - _disassemble_bytes(co.co_code, varnames=co.co_varnames, - names=co.co_names, constants=co.co_consts, - cells=self._cell_names, - linestarts=self._linestarts, - line_offset=self._line_offset, - file=output, - lasti=offset) - return output.getvalue() - - -def _test(): - """Simple test program to disassemble a file.""" - import argparse - - parser = argparse.ArgumentParser() - parser.add_argument('infile', type=argparse.FileType('rb'), nargs='?', default='-') - args = parser.parse_args() - with args.infile as infile: - source = infile.read() - code = compile(source, args.infile.name, "exec") - dis(code) - -if __name__ == "__main__": - _test() |