| # Copyright 2014 The Chromium Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style license that can be |
| # found in the LICENSE file. |
| |
| """Hooks that apply globally to all scripts that import or use Telemetry.""" |
| import signal |
| import sys |
| |
| from telemetry.internal.util import exception_formatter |
| |
| |
| def InstallHooks(): |
| InstallUnhandledExceptionFormatter() |
| InstallStackDumpOnSigusr1() |
| InstallTerminationHook() |
| |
| def InstallUnhandledExceptionFormatter(): |
| """Print prettier exceptions that also contain the stack frame's locals.""" |
| sys.excepthook = exception_formatter.PrintFormattedException |
| |
| |
| def InstallStackDumpOnSigusr1(): |
| """Catch SIGUSR1 and print a stack trace.""" |
| # Windows doesn't define SIGUSR1. |
| if not hasattr(signal, 'SIGUSR1'): |
| return |
| |
| def PrintDiagnostics(_, stack_frame): |
| exception_string = 'SIGUSR1 received, printed stack trace' |
| exception_formatter.PrintFormattedFrame(stack_frame, exception_string) |
| signal.signal(signal.SIGUSR1, PrintDiagnostics) |
| |
| |
| def InstallTerminationHook(): |
| """Catch SIGTERM, print a stack trace, and exit.""" |
| def PrintStackAndExit(sig, stack_frame): |
| exception_string = 'Received signal %s, exiting' % sig |
| exception_formatter.PrintFormattedFrame(stack_frame, exception_string) |
| sys.exit(-1) |
| signal.signal(signal.SIGTERM, PrintStackAndExit) |
