| 1 | #!/usr/bin/env python3 |
| 2 | # |
| 3 | # Copyright (C) - 2013 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
| 4 | # |
| 5 | # This program is free software; you can redistribute it and/or modify it |
| 6 | # under the terms of the GNU General Public License, version 2 only, as |
| 7 | # published by the Free Software Foundation. |
| 8 | # |
| 9 | # This program is distributed in the hope that it will be useful, but WITHOUT |
| 10 | # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 11 | # FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 12 | # more details. |
| 13 | # |
| 14 | # You should have received a copy of the GNU General Public License along with |
| 15 | # this program; if not, write to the Free Software Foundation, Inc., 51 |
| 16 | # Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. |
| 17 | |
| 18 | import uuid |
| 19 | import os |
| 20 | import subprocess |
| 21 | import shutil |
| 22 | import sys |
| 23 | import tempfile |
| 24 | |
| 25 | # Import lttng bindings generated in the current tree |
| 26 | lttng_bindings_path = os.path.dirname(os.path.abspath(__file__)) + "/" |
| 27 | for i in range(3): |
| 28 | lttng_bindings_path = os.path.dirname(lttng_bindings_path) |
| 29 | lttng_bindings_path = lttng_bindings_path + "/extras/bindings/swig/python" |
| 30 | lttng_bindings_libs_path = lttng_bindings_path + "/.libs" |
| 31 | sys.path.append(lttng_bindings_path) |
| 32 | sys.path.append(lttng_bindings_libs_path) |
| 33 | from lttng import * |
| 34 | |
| 35 | |
| 36 | class SessionInfo: |
| 37 | def __init__(self, handle, session_name, tmp_directory, channel_name): |
| 38 | self.handle = handle |
| 39 | self.name = session_name |
| 40 | self.tmp_directory = tmp_directory |
| 41 | self.trace_path = tmp_directory + "/" + session_name |
| 42 | self.channel_name = channel_name |
| 43 | |
| 44 | def bail(diag, session_info = None): |
| 45 | print("Bail out!") |
| 46 | print("#", diag) |
| 47 | |
| 48 | if session_info is not None: |
| 49 | stop_session(session_info, True) |
| 50 | |
| 51 | if os.path.exists(session_info.tmp_directory): |
| 52 | shutil.rmtree(session_info.tmp_directory) |
| 53 | exit(-1) |
| 54 | |
| 55 | def print_test_result(result, number, description): |
| 56 | result_string = None |
| 57 | if result is True: |
| 58 | result_string = "ok" |
| 59 | else: |
| 60 | result_string = "not ok" |
| 61 | |
| 62 | result_string += " {0} - {1}".format(number, description) |
| 63 | print(result_string) |
| 64 | |
| 65 | def enable_ust_tracepoint_event(session_info, event_name): |
| 66 | event = Event() |
| 67 | event.name = event_name |
| 68 | event.type = EVENT_TRACEPOINT |
| 69 | event.loglevel = EVENT_LOGLEVEL_ALL |
| 70 | res = enable_event(session_info.handle, event, session_info.channel_name) |
| 71 | if res < 0: |
| 72 | bail("Failed to enable userspace event " + event_name, session_info) |
| 73 | |
| 74 | def create_session(): |
| 75 | dom = Domain() |
| 76 | dom.type = DOMAIN_UST |
| 77 | |
| 78 | session_name = str(uuid.uuid1()) |
| 79 | tmp_directory = tempfile.mkdtemp() |
| 80 | trace_path = tmp_directory + "/" + session_name |
| 81 | |
| 82 | res = create(session_name, trace_path) |
| 83 | if res < 0: |
| 84 | bail("Failed to create tracing session.") |
| 85 | |
| 86 | channel = Channel() |
| 87 | channel.name = "channel0" |
| 88 | channel_set_default_attr(dom, channel.attr) |
| 89 | |
| 90 | han = Handle(session_name, dom) |
| 91 | res = enable_channel(han, channel) |
| 92 | |
| 93 | session_info = SessionInfo(han, session_name, tmp_directory, channel.name) |
| 94 | if res < 0: |
| 95 | bail("Failed to enable channel " + channel.name, session_info) |
| 96 | return session_info |
| 97 | |
| 98 | def start_session(session_info): |
| 99 | start(session_info.name) |
| 100 | |
| 101 | def stop_session(session_info, bailing = False): |
| 102 | # Workaround lttng-ctl outputing directly to stdout by spawning a subprocess. |
| 103 | lttng_binary_path = os.path.dirname(os.path.abspath(__file__)) + "/" |
| 104 | for i in range(3): |
| 105 | lttng_binary_path = os.path.dirname(lttng_binary_path) |
| 106 | lttng_binary_path = lttng_binary_path + "/src/bin/lttng/lttng" |
| 107 | |
| 108 | retcode = subprocess.call([lttng_binary_path, "stop", session_info.name], stdout=subprocess.PIPE, stderr=subprocess.PIPE) |
| 109 | if retcode != 0 and not bailing: |
| 110 | bail("Unable to stop session " + session_info.name, session_info) |
| 111 | destroy(session_info.name) |