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428 lines (306 loc) · 11.8 KB
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from __future__ import division, print_function, absolute_import
import time
import datetime
import sys
import traceback
import socket
import threading
import os
import signal
import atexit
import platform
import random
import math
from .runtime import min_version, runtime_info, register_signal
from .utils import timestamp, generate_uuid
from .config import Config
from .config_loader import ConfigLoader
from .message_queue import MessageQueue
from .frame_cache import FrameCache
from .reporters.process_reporter import ProcessReporter
from .reporters.profile_reporter import ProfileReporter, ProfilerConfig
from .reporters.error_reporter import ErrorReporter
from .reporters.span_reporter import SpanReporter
from .profilers.cpu_profiler import CPUProfiler
from .profilers.allocation_profiler import AllocationProfiler
from .profilers.block_profiler import BlockProfiler
class Span(object):
def __init__(self, stop_func = None):
if stop_func:
self.stop_func = stop_func
else:
self.stop_func = None
def stop(self):
if self.stop_func:
self.stop_func()
def __enter__(self):
pass
def __exit__(self, exc_type, exc_value, traceback):
self.stop()
class Agent(object):
AGENT_VERSION = "1.2.6"
SAAS_DASHBOARD_ADDRESS = "https://agent-api.stackimpact.com"
def __init__(self, **kwargs):
self.agent_started = False
self.agent_destroyed = False
self.profiler_active = False
self.span_active = False
self.main_thread_func = None
self.run_ts = None
self.run_id = None
self.config = Config(self)
self.config_loader = ConfigLoader(self)
self.message_queue = MessageQueue(self)
self.frame_cache = FrameCache(self)
self.process_reporter = ProcessReporter(self)
self.error_reporter = ErrorReporter(self)
self.span_reporter = SpanReporter(self)
config = ProfilerConfig()
config.log_prefix = 'CPU profiler'
config.max_profile_duration = 20
config.max_span_duration = 5
config.max_span_count = 30
config.span_interval = 20
config.report_interval = 120
self.cpu_reporter = ProfileReporter(self, CPUProfiler(self), config)
config = ProfilerConfig()
config.log_prefix = 'Allocation profiler'
config.max_profile_duration = 20
config.max_span_duration = 5
config.max_span_count = 30
config.span_interval = 20
config.report_interval = 120
self.allocation_reporter = ProfileReporter(self, AllocationProfiler(self), config)
config = ProfilerConfig()
config.log_prefix = 'Block profiler'
config.max_profile_duration = 20
config.max_span_duration = 5
config.max_span_count = 30
config.span_interval = 20
config.report_interval = 120
self.block_reporter = ProfileReporter(self, BlockProfiler(self), config)
self.options = None
def get_option(self, name, default_val=None):
if name not in self.options:
return default_val
else:
return self.options[name]
def start(self, **kwargs):
if not min_version(2, 7) and not min_version(3, 4):
raise Exception('Supported Python versions 2.6 or higher and 3.4 or higher')
if platform.python_implementation() != 'CPython':
raise Exception('Supported Python interpreter is CPython')
if self.agent_destroyed:
self.log('Destroyed agent cannot be started')
return
if self.agent_started:
return
self.options = kwargs
if 'auto_profiling' not in self.options:
self.options['auto_profiling'] = True
if 'dashboard_address' not in self.options:
self.options['dashboard_address'] = self.SAAS_DASHBOARD_ADDRESS
if 'agent_key' not in self.options:
raise Exception('missing option: agent_key')
if 'app_name' not in self.options:
raise Exception('missing option: app_name')
if 'host_name' not in self.options:
self.options['host_name'] = socket.gethostname()
self.run_id = generate_uuid()
self.run_ts = timestamp()
self.config_loader.start()
self.message_queue.start()
self.frame_cache.start()
self.cpu_reporter.setup()
self.allocation_reporter.setup()
self.block_reporter.setup()
self.span_reporter.setup()
self.error_reporter.setup()
self.process_reporter.setup()
# execute main_thread_func in main thread on signal
def _signal_handler(signum, frame):
if(self.main_thread_func):
func = self.main_thread_func
self.main_thread_func = None
try:
func()
except Exception:
self.exception()
return True
if not runtime_info.OS_WIN:
register_signal(signal.SIGUSR2, _signal_handler)
if self.get_option('auto_destroy') is None or self.get_option('auto_destroy') is True:
# destroy agent on exit
def _exit_handler(*arg):
if not self.agent_started or self.agent_destroyed:
return
try:
self.message_queue.flush()
self.destroy()
except Exception:
self.exception()
atexit.register(_exit_handler)
if not runtime_info.OS_WIN:
register_signal(signal.SIGQUIT, _exit_handler, once = True)
register_signal(signal.SIGINT, _exit_handler, once = True)
register_signal(signal.SIGTERM, _exit_handler, once = True)
register_signal(signal.SIGHUP, _exit_handler, once = True)
self.agent_started = True
self.log('Agent started')
def enable(self):
if not self.config.is_agent_enabled():
self.cpu_reporter.start()
self.allocation_reporter.start()
self.block_reporter.start()
self.span_reporter.start()
self.error_reporter.start()
self.process_reporter.start()
self.config.set_agent_enabled(True)
def disable(self):
if self.config.is_agent_enabled():
self.cpu_reporter.stop()
self.allocation_reporter.stop()
self.block_reporter.stop()
self.span_reporter.stop()
self.error_reporter.stop()
self.process_reporter.stop()
self.config.set_agent_enabled(False)
def profile(self, name='Default'):
if not self.agent_started or self.span_active:
return Span(None)
self.span_active = True
selected_reporter = None
active_reporters = []
if self.cpu_reporter.started:
active_reporters.append(self.cpu_reporter)
if self.allocation_reporter.started:
active_reporters.append(self.allocation_reporter)
if self.block_reporter.started:
active_reporters.append(self.block_reporter)
if len(active_reporters) > 0:
selected_reporter = active_reporters[int(math.floor(random.random() * len(active_reporters)))]
if not selected_reporter.start_profiling(True, True):
selected_reporter = None
start_timestamp = time.time()
def stop_func():
if selected_reporter:
selected_reporter.stop_profiling()
duration = time.time() - start_timestamp
self.span_reporter.record_span(name, duration)
if not self.get_option('auto_profiling'):
self.config_loader.load(True)
if selected_reporter:
selected_reporter.report(True);
self.message_queue.flush(True)
self.span_active = False
return Span(stop_func)
def _start_profiler(self, reporter):
if not self.agent_started or self.get_option('auto_profiling'):
return
self.span_active = True
reporter.start()
reporter.start_profiling(True, False)
def _stop_profiler(self, reporter):
if not self.agent_started or self.get_option('auto_profiling'):
return
reporter.stop_profiling()
reporter.report(False)
reporter.stop()
self.message_queue.flush(False)
self.span_active = False
def start_cpu_profiler(self):
self._start_profiler(self.cpu_reporter)
def stop_cpu_profiler(self):
self._stop_profiler(self.cpu_reporter)
def start_allocation_profiler(self):
self._start_profiler(self.allocation_reporter)
def stop_allocation_profiler(self):
self._stop_profiler(self.allocation_reporter)
def start_block_profiler(self):
self._start_profiler(self.block_reporter)
def stop_block_profiler(self):
self._stop_profiler(self.block_reporter)
def destroy(self):
if not self.agent_started:
self.log('Agent has not been started')
return
if self.agent_destroyed:
return
self.config_loader.stop()
self.message_queue.stop()
self.frame_cache.stop()
self.cpu_reporter.stop()
self.allocation_reporter.stop()
self.block_reporter.stop()
self.error_reporter.stop()
self.span_reporter.stop()
self.process_reporter.stop()
self.cpu_reporter.destroy()
self.allocation_reporter.destroy()
self.block_reporter.destroy()
self.error_reporter.destroy()
self.span_reporter.destroy()
self.process_reporter.destroy()
self.agent_destroyed = True
self.log('Agent destroyed')
def log_prefix(self):
return '[' + datetime.datetime.now().strftime('%H:%M:%S.%f') + '] StackImpact ' + self.AGENT_VERSION + ':'
def log(self, message):
if self.get_option('debug'):
print(self.log_prefix(), message)
def print_err(self, *args, **kwargs):
print(*args, file=sys.stderr, **kwargs)
def error(self, message):
if self.get_option('debug'):
self.print_err(self.log_prefix(), message)
def exception(self):
if self.get_option('debug'):
traceback.print_exc()
def delay(self, timeout, func, *args):
def func_wrapper():
try:
func(*args)
except Exception:
self.exception()
t = threading.Timer(timeout, func_wrapper, ())
t.start()
return t
def schedule(self, timeout, interval, func, *args):
tw = TimerWraper()
def func_wrapper():
start = time.time()
try:
func(*args)
except Exception:
self.exception()
with tw.cancel_lock:
if not tw.canceled:
tw.timer = threading.Timer(abs(interval - (time.time() - start)), func_wrapper, ())
tw.timer.start()
tw.timer = threading.Timer(timeout, func_wrapper, ())
tw.timer.start()
return tw
def run_in_thread(self, func):
def func_wrapper():
try:
func()
except Exception:
self.exception()
t = threading.Thread(target=func_wrapper)
t.start()
return t
def run_in_main_thread(self, func):
if self.main_thread_func:
return False
self.main_thread_func = func
os.kill(os.getpid(), signal.SIGUSR2)
return True
class TimerWraper(object):
def __init__(self):
self.timer = None
self.cancel_lock = threading.Lock()
self.canceled = False
def cancel(self):
with self.cancel_lock:
self.canceled = True
self.timer.cancel()
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