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Diffstat (limited to 'tests/bytecode/pylib-tests/bdb.py')
| -rw-r--r-- | tests/bytecode/pylib-tests/bdb.py | 647 |
1 files changed, 0 insertions, 647 deletions
diff --git a/tests/bytecode/pylib-tests/bdb.py b/tests/bytecode/pylib-tests/bdb.py deleted file mode 100644 index 0579296de..000000000 --- a/tests/bytecode/pylib-tests/bdb.py +++ /dev/null @@ -1,647 +0,0 @@ -"""Debugger basics""" - -import fnmatch -import sys -import os - -__all__ = ["BdbQuit", "Bdb", "Breakpoint"] - -class BdbQuit(Exception): - """Exception to give up completely.""" - - -class Bdb: - """Generic Python debugger base class. - - This class takes care of details of the trace facility; - a derived class should implement user interaction. - The standard debugger class (pdb.Pdb) is an example. - """ - - def __init__(self, skip=None): - self.skip = set(skip) if skip else None - self.breaks = {} - self.fncache = {} - self.frame_returning = None - - def canonic(self, filename): - if filename == "<" + filename[1:-1] + ">": - return filename - canonic = self.fncache.get(filename) - if not canonic: - canonic = os.path.abspath(filename) - canonic = os.path.normcase(canonic) - self.fncache[filename] = canonic - return canonic - - def reset(self): - import linecache - linecache.checkcache() - self.botframe = None - self._set_stopinfo(None, None) - - def trace_dispatch(self, frame, event, arg): - if self.quitting: - return # None - if event == 'line': - return self.dispatch_line(frame) - if event == 'call': - return self.dispatch_call(frame, arg) - if event == 'return': - return self.dispatch_return(frame, arg) - if event == 'exception': - return self.dispatch_exception(frame, arg) - if event == 'c_call': - return self.trace_dispatch - if event == 'c_exception': - return self.trace_dispatch - if event == 'c_return': - return self.trace_dispatch - print('bdb.Bdb.dispatch: unknown debugging event:', repr(event)) - return self.trace_dispatch - - def dispatch_line(self, frame): - if self.stop_here(frame) or self.break_here(frame): - self.user_line(frame) - if self.quitting: raise BdbQuit - return self.trace_dispatch - - def dispatch_call(self, frame, arg): - # XXX 'arg' is no longer used - if self.botframe is None: - # First call of dispatch since reset() - self.botframe = frame.f_back # (CT) Note that this may also be None! - return self.trace_dispatch - if (self.stop_here(frame) or self.break_anywhere(frame)): - # No need to trace this function - return # None - self.user_call(frame, arg) - if self.quitting: raise BdbQuit - return self.trace_dispatch - - def dispatch_return(self, frame, arg): - if self.stop_here(frame) or frame == self.returnframe: - try: - self.frame_returning = frame - self.user_return(frame, arg) - finally: - self.frame_returning = None - if self.quitting: raise BdbQuit - return self.trace_dispatch - - def dispatch_exception(self, frame, arg): - if self.stop_here(frame): - self.user_exception(frame, arg) - if self.quitting: raise BdbQuit - return self.trace_dispatch - - # Normally derived classes don't override the following - # methods, but they may if they want to redefine the - # definition of stopping and breakpoints. - - def is_skipped_module(self, module_name): - for pattern in self.skip: - if fnmatch.fnmatch(module_name, pattern): - return True - return False - - def stop_here(self, frame): - # (CT) stopframe may now also be None, see dispatch_call. - # (CT) the former test for None is therefore removed from here. - if self.skip and \ - self.is_skipped_module(frame.f_globals.get('__name__')): - return False - if frame is self.stopframe: - if self.stoplineno == -1: - return False - return frame.f_lineno >= self.stoplineno - while frame is not None and frame is not self.stopframe: - if frame is self.botframe: - return True - frame = frame.f_back - return False - - def break_here(self, frame): - filename = self.canonic(frame.f_code.co_filename) - if filename not in self.breaks: - return False - lineno = frame.f_lineno - if lineno not in self.breaks[filename]: - # The line itself has no breakpoint, but maybe the line is the - # first line of a function with breakpoint set by function name. - lineno = frame.f_code.co_firstlineno - if lineno not in self.breaks[filename]: - return False - - # flag says ok to delete temp. bp - (bp, flag) = effective(filename, lineno, frame) - if bp: - self.currentbp = bp.number - if (flag and bp.temporary): - self.do_clear(str(bp.number)) - return True - else: - return False - - def do_clear(self, arg): - raise NotImplementedError("subclass of bdb must implement do_clear()") - - def break_anywhere(self, frame): - return self.canonic(frame.f_code.co_filename) in self.breaks - - # Derived classes should override the user_* methods - # to gain control. - - def user_call(self, frame, argument_list): - """This method is called when there is the remote possibility - that we ever need to stop in this function.""" - pass - - def user_line(self, frame): - """This method is called when we stop or break at this line.""" - pass - - def user_return(self, frame, return_value): - """This method is called when a return trap is set here.""" - pass - - def user_exception(self, frame, exc_info): - """This method is called if an exception occurs, - but only if we are to stop at or just below this level.""" - pass - - def _set_stopinfo(self, stopframe, returnframe, stoplineno=0): - self.stopframe = stopframe - self.returnframe = returnframe - self.quitting = False - # stoplineno >= 0 means: stop at line >= the stoplineno - # stoplineno -1 means: don't stop at all - self.stoplineno = stoplineno - - # Derived classes and clients can call the following methods - # to affect the stepping state. - - def set_until(self, frame, lineno=None): - """Stop when the line with the line no greater than the current one is - reached or when returning from current frame""" - # the name "until" is borrowed from gdb - if lineno is None: - lineno = frame.f_lineno + 1 - self._set_stopinfo(frame, frame, lineno) - - def set_step(self): - """Stop after one line of code.""" - # Issue #13183: pdb skips frames after hitting a breakpoint and running - # step commands. - # Restore the trace function in the caller (that may not have been set - # for performance reasons) when returning from the current frame. - if self.frame_returning: - caller_frame = self.frame_returning.f_back - if caller_frame and caller_frame.f_trace: - caller_frame.f_trace = self.trace_dispatch - self._set_stopinfo(None, None) - - def set_next(self, frame): - """Stop on the next line in or below the given frame.""" - self._set_stopinfo(frame, None) - - def set_return(self, frame): - """Stop when returning from the given frame.""" - self._set_stopinfo(frame.f_back, frame) - - def set_trace(self, frame=None): - """Start debugging from `frame`. - - If frame is not specified, debugging starts from caller's frame. - """ - if frame is None: - frame = sys._getframe().f_back - self.reset() - while frame: - frame.f_trace = self.trace_dispatch - self.botframe = frame - frame = frame.f_back - self.set_step() - sys.settrace(self.trace_dispatch) - - def set_continue(self): - # Don't stop except at breakpoints or when finished - self._set_stopinfo(self.botframe, None, -1) - if not self.breaks: - # no breakpoints; run without debugger overhead - sys.settrace(None) - frame = sys._getframe().f_back - while frame and frame is not self.botframe: - del frame.f_trace - frame = frame.f_back - - def set_quit(self): - self.stopframe = self.botframe - self.returnframe = None - self.quitting = True - sys.settrace(None) - - # Derived classes and clients can call the following methods - # to manipulate breakpoints. These methods return an - # error message is something went wrong, None if all is well. - # Set_break prints out the breakpoint line and file:lineno. - # Call self.get_*break*() to see the breakpoints or better - # for bp in Breakpoint.bpbynumber: if bp: bp.bpprint(). - - def set_break(self, filename, lineno, temporary=False, cond=None, - funcname=None): - filename = self.canonic(filename) - import linecache # Import as late as possible - line = linecache.getline(filename, lineno) - if not line: - return 'Line %s:%d does not exist' % (filename, lineno) - list = self.breaks.setdefault(filename, []) - if lineno not in list: - list.append(lineno) - bp = Breakpoint(filename, lineno, temporary, cond, funcname) - - def _prune_breaks(self, filename, lineno): - if (filename, lineno) not in Breakpoint.bplist: - self.breaks[filename].remove(lineno) - if not self.breaks[filename]: - del self.breaks[filename] - - def clear_break(self, filename, lineno): - filename = self.canonic(filename) - if filename not in self.breaks: - return 'There are no breakpoints in %s' % filename - if lineno not in self.breaks[filename]: - return 'There is no breakpoint at %s:%d' % (filename, lineno) - # If there's only one bp in the list for that file,line - # pair, then remove the breaks entry - for bp in Breakpoint.bplist[filename, lineno][:]: - bp.deleteMe() - self._prune_breaks(filename, lineno) - - def clear_bpbynumber(self, arg): - try: - bp = self.get_bpbynumber(arg) - except ValueError as err: - return str(err) - bp.deleteMe() - self._prune_breaks(bp.file, bp.line) - - def clear_all_file_breaks(self, filename): - filename = self.canonic(filename) - if filename not in self.breaks: - return 'There are no breakpoints in %s' % filename - for line in self.breaks[filename]: - blist = Breakpoint.bplist[filename, line] - for bp in blist: - bp.deleteMe() - del self.breaks[filename] - - def clear_all_breaks(self): - if not self.breaks: - return 'There are no breakpoints' - for bp in Breakpoint.bpbynumber: - if bp: - bp.deleteMe() - self.breaks = {} - - def get_bpbynumber(self, arg): - if not arg: - raise ValueError('Breakpoint number expected') - try: - number = int(arg) - except ValueError: - raise ValueError('Non-numeric breakpoint number %s' % arg) - try: - bp = Breakpoint.bpbynumber[number] - except IndexError: - raise ValueError('Breakpoint number %d out of range' % number) - if bp is None: - raise ValueError('Breakpoint %d already deleted' % number) - return bp - - def get_break(self, filename, lineno): - filename = self.canonic(filename) - return filename in self.breaks and \ - lineno in self.breaks[filename] - - def get_breaks(self, filename, lineno): - filename = self.canonic(filename) - return filename in self.breaks and \ - lineno in self.breaks[filename] and \ - Breakpoint.bplist[filename, lineno] or [] - - def get_file_breaks(self, filename): - filename = self.canonic(filename) - if filename in self.breaks: - return self.breaks[filename] - else: - return [] - - def get_all_breaks(self): - return self.breaks - - # Derived classes and clients can call the following method - # to get a data structure representing a stack trace. - - def get_stack(self, f, t): - stack = [] - if t and t.tb_frame is f: - t = t.tb_next - while f is not None: - stack.append((f, f.f_lineno)) - if f is self.botframe: - break - f = f.f_back - stack.reverse() - i = max(0, len(stack) - 1) - while t is not None: - stack.append((t.tb_frame, t.tb_lineno)) - t = t.tb_next - if f is None: - i = max(0, len(stack) - 1) - return stack, i - - def format_stack_entry(self, frame_lineno, lprefix=': '): - import linecache, reprlib - frame, lineno = frame_lineno - filename = self.canonic(frame.f_code.co_filename) - s = '%s(%r)' % (filename, lineno) - if frame.f_code.co_name: - s += frame.f_code.co_name - else: - s += "<lambda>" - if '__args__' in frame.f_locals: - args = frame.f_locals['__args__'] - else: - args = None - if args: - s += reprlib.repr(args) - else: - s += '()' - if '__return__' in frame.f_locals: - rv = frame.f_locals['__return__'] - s += '->' - s += reprlib.repr(rv) - line = linecache.getline(filename, lineno, frame.f_globals) - if line: - s += lprefix + line.strip() - return s - - # The following methods can be called by clients to use - # a debugger to debug a statement or an expression. - # Both can be given as a string, or a code object. - - def run(self, cmd, globals=None, locals=None): - if globals is None: - import __main__ - globals = __main__.__dict__ - if locals is None: - locals = globals - self.reset() - if isinstance(cmd, str): - cmd = compile(cmd, "<string>", "exec") - sys.settrace(self.trace_dispatch) - try: - exec(cmd, globals, locals) - except BdbQuit: - pass - finally: - self.quitting = True - sys.settrace(None) - - def runeval(self, expr, globals=None, locals=None): - if globals is None: - import __main__ - globals = __main__.__dict__ - if locals is None: - locals = globals - self.reset() - sys.settrace(self.trace_dispatch) - try: - return eval(expr, globals, locals) - except BdbQuit: - pass - finally: - self.quitting = True - sys.settrace(None) - - def runctx(self, cmd, globals, locals): - # B/W compatibility - self.run(cmd, globals, locals) - - # This method is more useful to debug a single function call. - - def runcall(self, func, *args, **kwds): - self.reset() - sys.settrace(self.trace_dispatch) - res = None - try: - res = func(*args, **kwds) - except BdbQuit: - pass - finally: - self.quitting = True - sys.settrace(None) - return res - - -def set_trace(): - Bdb().set_trace() - - -class Breakpoint: - """Breakpoint class. - - Implements temporary breakpoints, ignore counts, disabling and - (re)-enabling, and conditionals. - - Breakpoints are indexed by number through bpbynumber and by - the file,line tuple using bplist. The former points to a - single instance of class Breakpoint. The latter points to a - list of such instances since there may be more than one - breakpoint per line. - - """ - - # XXX Keeping state in the class is a mistake -- this means - # you cannot have more than one active Bdb instance. - - next = 1 # Next bp to be assigned - bplist = {} # indexed by (file, lineno) tuple - bpbynumber = [None] # Each entry is None or an instance of Bpt - # index 0 is unused, except for marking an - # effective break .... see effective() - - def __init__(self, file, line, temporary=False, cond=None, funcname=None): - self.funcname = funcname - # Needed if funcname is not None. - self.func_first_executable_line = None - self.file = file # This better be in canonical form! - self.line = line - self.temporary = temporary - self.cond = cond - self.enabled = True - self.ignore = 0 - self.hits = 0 - self.number = Breakpoint.next - Breakpoint.next += 1 - # Build the two lists - self.bpbynumber.append(self) - if (file, line) in self.bplist: - self.bplist[file, line].append(self) - else: - self.bplist[file, line] = [self] - - def deleteMe(self): - index = (self.file, self.line) - self.bpbynumber[self.number] = None # No longer in list - self.bplist[index].remove(self) - if not self.bplist[index]: - # No more bp for this f:l combo - del self.bplist[index] - - def enable(self): - self.enabled = True - - def disable(self): - self.enabled = False - - def bpprint(self, out=None): - if out is None: - out = sys.stdout - print(self.bpformat(), file=out) - - def bpformat(self): - if self.temporary: - disp = 'del ' - else: - disp = 'keep ' - if self.enabled: - disp = disp + 'yes ' - else: - disp = disp + 'no ' - ret = '%-4dbreakpoint %s at %s:%d' % (self.number, disp, - self.file, self.line) - if self.cond: - ret += '\n\tstop only if %s' % (self.cond,) - if self.ignore: - ret += '\n\tignore next %d hits' % (self.ignore,) - if self.hits: - if self.hits > 1: - ss = 's' - else: - ss = '' - ret += '\n\tbreakpoint already hit %d time%s' % (self.hits, ss) - return ret - - def __str__(self): - return 'breakpoint %s at %s:%s' % (self.number, self.file, self.line) - -# -----------end of Breakpoint class---------- - -def checkfuncname(b, frame): - """Check whether we should break here because of `b.funcname`.""" - if not b.funcname: - # Breakpoint was set via line number. - if b.line != frame.f_lineno: - # Breakpoint was set at a line with a def statement and the function - # defined is called: don't break. - return False - return True - - # Breakpoint set via function name. - - if frame.f_code.co_name != b.funcname: - # It's not a function call, but rather execution of def statement. - return False - - # We are in the right frame. - if not b.func_first_executable_line: - # The function is entered for the 1st time. - b.func_first_executable_line = frame.f_lineno - - if b.func_first_executable_line != frame.f_lineno: - # But we are not at the first line number: don't break. - return False - return True - -# Determines if there is an effective (active) breakpoint at this -# line of code. Returns breakpoint number or 0 if none -def effective(file, line, frame): - """Determine which breakpoint for this file:line is to be acted upon. - - Called only if we know there is a bpt at this - location. Returns breakpoint that was triggered and a flag - that indicates if it is ok to delete a temporary bp. - - """ - possibles = Breakpoint.bplist[file, line] - for b in possibles: - if not b.enabled: - continue - if not checkfuncname(b, frame): - continue - # Count every hit when bp is enabled - b.hits += 1 - if not b.cond: - # If unconditional, and ignoring go on to next, else break - if b.ignore > 0: - b.ignore -= 1 - continue - else: - # breakpoint and marker that it's ok to delete if temporary - return (b, True) - else: - # Conditional bp. - # Ignore count applies only to those bpt hits where the - # condition evaluates to true. - try: - val = eval(b.cond, frame.f_globals, frame.f_locals) - if val: - if b.ignore > 0: - b.ignore -= 1 - # continue - else: - return (b, True) - # else: - # continue - except: - # if eval fails, most conservative thing is to stop on - # breakpoint regardless of ignore count. Don't delete - # temporary, as another hint to user. - return (b, False) - return (0+None, None) - - -# -------------------- testing -------------------- - -class Tdb(Bdb): - def user_call(self, frame, args): - name = frame.f_code.co_name - if not name: name = '???' - print('+++ call', name, args) - def user_line(self, frame): - import linecache - name = frame.f_code.co_name - if not name: name = '???' - fn = self.canonic(frame.f_code.co_filename) - line = linecache.getline(fn, frame.f_lineno, frame.f_globals) - print('+++', fn, frame.f_lineno, name, ':', line.strip()) - def user_return(self, frame, retval): - print('+++ return', retval) - def user_exception(self, frame, exc_stuff): - print('+++ exception', exc_stuff) - self.set_continue() - -def foo(n): - print('foo(', n, ')') - x = bar(n*10) - print('bar returned', x) - -def bar(a): - print('bar(', a, ')') - return a/2 - -def test(): - t = Tdb() - t.run('import bdb; bdb.foo(10)') |