| import signal |
| import os |
| import pexpect |
| import traceback |
| from log import * |
| |
| |
| class Hook(object): |
| """ |
| Generic hooks before/after API/CLI calls |
| """ |
| |
| def __init__(self, logger): |
| self.logger = logger |
| |
| def before_api(self, api_name, api_args): |
| """ |
| Function called before API call |
| Emit a debug message describing the API name and arguments |
| |
| @param api_name: name of the API |
| @param api_args: tuple containing the API arguments |
| """ |
| self.logger.debug("API: %s (%s)" % |
| (api_name, api_args), extra={'color': RED}) |
| |
| def after_api(self, api_name, api_args): |
| """ |
| Function called after API call |
| |
| @param api_name: name of the API |
| @param api_args: tuple containing the API arguments |
| """ |
| pass |
| |
| def before_cli(self, cli): |
| """ |
| Function called before CLI call |
| Emit a debug message describing the CLI |
| |
| @param cli: CLI string |
| """ |
| self.logger.debug("CLI: %s" % (cli), extra={'color': RED}) |
| |
| def after_cli(self, cli): |
| """ |
| Function called after CLI call |
| """ |
| pass |
| |
| |
| class VppDiedError(Exception): |
| pass |
| |
| |
| class PollHook(Hook): |
| """ Hook which checks if the vpp subprocess is alive """ |
| |
| def __init__(self, testcase): |
| self.vpp_dead = False |
| self.testcase = testcase |
| self.logger = testcase.logger |
| |
| def spawn_gdb(self, gdb_path, core_path): |
| gdb_cmdline = gdb_path + ' ' + self.testcase.vpp_bin + ' ' + core_path |
| gdb = pexpect.spawn(gdb_cmdline) |
| gdb.interact() |
| try: |
| gdb.terminate(True) |
| except: |
| pass |
| if gdb.isalive(): |
| raise Exception("GDB refused to die...") |
| |
| def on_crash(self, core_path): |
| if self.testcase.debug_core: |
| gdb_path = '/usr/bin/gdb' |
| if os.path.isfile(gdb_path) and os.access(gdb_path, os.X_OK): |
| # automatically attach gdb |
| self.spawn_gdb(gdb_path, core_path) |
| return |
| else: |
| self.logger.error( |
| "Debugger '%s' does not exist or is not an executable.." % |
| gdb_path) |
| |
| self.logger.critical('core file present, debug with: gdb ' + |
| self.testcase.vpp_bin + ' ' + core_path) |
| |
| def poll_vpp(self): |
| """ |
| Poll the vpp status and throw an exception if it's not running |
| :raises VppDiedError: exception if VPP is not running anymore |
| """ |
| if self.vpp_dead: |
| # already dead, nothing to do |
| return |
| |
| self.testcase.vpp.poll() |
| if self.testcase.vpp.returncode is not None: |
| signaldict = dict( |
| (k, v) for v, k in reversed(sorted(signal.__dict__.items())) |
| if v.startswith('SIG') and not v.startswith('SIG_')) |
| msg = "VPP subprocess died unexpectedly with returncode %d [%s]" % ( |
| self.testcase.vpp.returncode, |
| signaldict[abs(self.testcase.vpp.returncode)]) |
| self.logger.critical(msg) |
| core_path = self.testcase.tempdir + '/core' |
| if os.path.isfile(core_path): |
| self.on_crash(core_path) |
| self.testcase.vpp_dead = True |
| raise VppDiedError(msg) |
| |
| def after_api(self, api_name, api_args): |
| """ |
| Check if VPP died after executing an API |
| |
| :param api_name: name of the API |
| :param api_args: tuple containing the API arguments |
| :raises VppDiedError: exception if VPP is not running anymore |
| |
| """ |
| super(PollHook, self).after_api(api_name, api_args) |
| self.poll_vpp() |
| |
| def after_cli(self, cli): |
| """ |
| Check if VPP died after executing a CLI |
| |
| :param cli: CLI string |
| :raises Exception: exception if VPP is not running anymore |
| |
| """ |
| super(PollHook, self).after_cli(cli) |
| self.poll_vpp() |
| |
| |
| class StepHook(PollHook): |
| """ Hook which requires user to press ENTER before doing any API/CLI """ |
| |
| def __init__(self, testcase): |
| self.skip_stack = None |
| self.skip_num = None |
| self.skip_count = 0 |
| super(StepHook, self).__init__(testcase) |
| |
| def skip(self): |
| if self.skip_stack is None: |
| return False |
| stack = traceback.extract_stack() |
| counter = 0 |
| skip = True |
| for e in stack: |
| if counter > self.skip_num: |
| break |
| if e[0] != self.skip_stack[counter][0]: |
| skip = False |
| if e[1] != self.skip_stack[counter][1]: |
| skip = False |
| counter += 1 |
| if skip: |
| self.skip_count += 1 |
| return True |
| else: |
| print("%d API/CLI calls skipped in specified stack " |
| "frame" % self.skip_count) |
| self.skip_count = 0 |
| self.skip_stack = None |
| self.skip_num = None |
| return False |
| |
| def user_input(self): |
| print('number\tfunction\tfile\tcode') |
| counter = 0 |
| stack = traceback.extract_stack() |
| for e in stack: |
| print('%02d.\t%s\t%s:%d\t[%s]' % (counter, e[2], e[0], e[1], e[3])) |
| counter += 1 |
| print(single_line_delim) |
| print("You can enter a number of stack frame chosen from above") |
| print("Calls in/below that stack frame will be not be stepped anymore") |
| print(single_line_delim) |
| while True: |
| choice = raw_input("Enter your choice, if any, and press ENTER to " |
| "continue running the testcase...") |
| if choice == "": |
| choice = None |
| try: |
| if choice is not None: |
| num = int(choice) |
| except: |
| print("Invalid input") |
| continue |
| if choice is not None and (num < 0 or num >= len(stack)): |
| print("Invalid choice") |
| continue |
| break |
| if choice is not None: |
| self.skip_stack = stack |
| self.skip_num = num |
| |
| def before_cli(self, cli): |
| """ Wait for ENTER before executing CLI """ |
| if self.skip(): |
| print("Skip pause before executing CLI: %s" % cli) |
| else: |
| print(double_line_delim) |
| print("Test paused before executing CLI: %s" % cli) |
| print(single_line_delim) |
| self.user_input() |
| super(StepHook, self).before_cli(cli) |
| |
| def before_api(self, api_name, api_args): |
| """ Wait for ENTER before executing API """ |
| if self.skip(): |
| print("Skip pause before executing API: %s (%s)" |
| % (api_name, api_args)) |
| else: |
| print(double_line_delim) |
| print("Test paused before executing API: %s (%s)" |
| % (api_name, api_args)) |
| print(single_line_delim) |
| self.user_input() |
| super(StepHook, self).before_api(api_name, api_args) |