import dis import os.path import re import subprocess import sys import types import unittest from test.support import findfile def abspath(filename): return os.path.abspath(findfile(filename, subdir="dtracedata")) def normalize_trace_output(output): """Normalize DTrace output for comparison. DTrace keeps a per-CPU buffer, and when showing the fired probes, buffers are concatenated. So if the operating system moves our thread around, the straight result can be "non-causal". So we add timestamps to the probe firing, sort by that field, then strip it from the output""" # When compiling with '--with-pydebug', strip '[# refs]' debug output. output = re.sub(r"\[[0-9]+ refs\]", "", output) try: result = [ row.split("\t") for row in output.splitlines() if row and not row.startswith('#') ] result.sort(key=lambda row: int(row[0])) result = [row[1] for row in result] return "\n".join(result) except (IndexError, ValueError): raise AssertionError( "tracer produced unparsable output:\n{}".format(output) ) class TraceBackend: EXTENSION = None COMMAND = None COMMAND_ARGS = [] def run_case(self, name, optimize_python=None): actual_output = normalize_trace_output(self.trace_python( script_file=abspath(name + self.EXTENSION), python_file=abspath(name + ".py"), optimize_python=optimize_python)) with open(abspath(name + self.EXTENSION + ".expected")) as f: expected_output = f.read().rstrip() return (expected_output, actual_output) def generate_trace_command(self, script_file, subcommand=None): command = self.COMMAND + [script_file] if subcommand: command += ["-c", subcommand] return command def trace(self, script_file, subcommand=None): command = self.generate_trace_command(script_file, subcommand) stdout, _ = subprocess.Popen(command, stdout=subprocess.PIPE, stderr=subprocess.STDOUT, universal_newlines=True).communicate() return stdout def trace_python(self, script_file, python_file, optimize_python=None): python_flags = [] if optimize_python: python_flags.extend(["-O"] * optimize_python) subcommand = " ".join([sys.executable] + python_flags + [python_file]) return self.trace(script_file, subcommand) def assert_usable(self): try: output = self.trace(abspath("assert_usable" + self.EXTENSION)) output = output.strip() except (FileNotFoundError, NotADirectoryError, PermissionError) as fnfe: output = str(fnfe) if output != "probe: success": raise unittest.SkipTest( "{}(1) failed: {}".format(self.COMMAND[0], output) ) class DTraceBackend(TraceBackend): EXTENSION = ".d" COMMAND = ["dtrace", "-q", "-s"] class SystemTapBackend(TraceBackend): EXTENSION = ".stp" COMMAND = ["stap", "-g"] class TraceTests: # unittest.TestCase options maxDiff = None # TraceTests options backend = None optimize_python = 0 @classmethod def setUpClass(self): self.backend.assert_usable() def run_case(self, name): actual_output, expected_output = self.backend.run_case( name, optimize_python=self.optimize_python) self.assertEqual(actual_output, expected_output) def test_function_entry_return(self): self.run_case("call_stack") def test_verify_call_opcodes(self): """Ensure our call stack test hits all function call opcodes""" opcodes = set(["CALL_FUNCTION", "CALL_FUNCTION_EX", "CALL_FUNCTION_KW"]) with open(abspath("call_stack.py")) as f: code_string = f.read() def get_function_instructions(funcname): # Recompile with appropriate optimization setting code = compile(source=code_string, filename="", mode="exec", optimize=self.optimize_python) for c in code.co_consts: if isinstance(c, types.CodeType) and c.co_name == funcname: return dis.get_instructions(c) return [] for instruction in get_function_instructions('start'): opcodes.discard(instruction.opname) self.assertEqual(set(), opcodes) def test_gc(self): self.run_case("gc") def test_line(self): self.run_case("line") class DTraceNormalTests(TraceTests, unittest.TestCase): backend = DTraceBackend() optimize_python = 0 class DTraceOptimizedTests(TraceTests, unittest.TestCase): backend = DTraceBackend() optimize_python = 2 class SystemTapNormalTests(TraceTests, unittest.TestCase): backend = SystemTapBackend() optimize_python = 0 class SystemTapOptimizedTests(TraceTests, unittest.TestCase): backend = SystemTapBackend() optimize_python = 2 if __name__ == '__main__': unittest.main() an class="hl str"> """ __revision__ = "$Id$" from _curses import * from curses.wrapper import wrapper import os as _os import sys as _sys # Some constants, most notably the ACS_* ones, are only added to the C # _curses module's dictionary after initscr() is called. (Some # versions of SGI's curses don't define values for those constants # until initscr() has been called.) This wrapper function calls the # underlying C initscr(), and then copies the constants from the # _curses module to the curses package's dictionary. Don't do 'from # curses import *' if you'll be needing the ACS_* constants. def initscr(): import _curses, curses # we call setupterm() here because it raises an error # instead of calling exit() in error cases. setupterm(term=_os.environ.get("TERM", "unknown"), fd=_sys.__stdout__.fileno()) stdscr = _curses.initscr() for key, value in _curses.__dict__.items(): if key[0:4] == 'ACS_' or key in ('LINES', 'COLS'): setattr(curses, key, value) return stdscr # This is a similar wrapper for start_color(), which adds the COLORS and # COLOR_PAIRS variables which are only available after start_color() is # called. def start_color(): import _curses, curses retval = _curses.start_color() if hasattr(_curses, 'COLORS'): curses.COLORS = _curses.COLORS if hasattr(_curses, 'COLOR_PAIRS'): curses.COLOR_PAIRS = _curses.COLOR_PAIRS return retval # Import Python has_key() implementation if _curses doesn't contain has_key() try: has_key except NameError: from has_key import has_key
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