gecko-dev/testing/mochitest/leaks.py

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Python
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# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/
# The content of this file comes orginally from automationutils.py
# and *should* be revised.
import re
from operator import itemgetter
class ShutdownLeaks(object):
"""
Parses the mochitest run log when running a debug build, assigns all leaked
DOM windows (that are still around after test suite shutdown, despite running
the GC) to the tests that created them and prints leak statistics.
"""
def __init__(self, logger):
self.logger = logger
self.tests = []
self.leakedWindows = {}
self.leakedDocShells = set()
self.currentTest = None
self.seenShutdown = set()
def log(self, message):
if message['action'] == 'log':
line = message['message']
if line[2:11] == "DOMWINDOW":
self._logWindow(line)
elif line[2:10] == "DOCSHELL":
self._logDocShell(line)
elif line.startswith("Completed ShutdownLeaks collections in process"):
pid = int(line.split()[-1])
self.seenShutdown.add(pid)
elif message['action'] == 'test_start':
fileName = message['test'].replace(
"chrome://mochitests/content/browser/", "")
self.currentTest = {
"fileName": fileName, "windows": set(), "docShells": set()}
elif message['action'] == 'test_end':
# don't track a test if no windows or docShells leaked
if self.currentTest and (self.currentTest["windows"] or self.currentTest["docShells"]):
self.tests.append(self.currentTest)
self.currentTest = None
def process(self):
if not self.seenShutdown:
self.logger.warning(
"TEST-UNEXPECTED-FAIL | ShutdownLeaks | process() called before end of test suite")
for test in self._parseLeakingTests():
for url, count in self._zipLeakedWindows(test["leakedWindows"]):
self.logger.warning(
"TEST-UNEXPECTED-FAIL | %s | leaked %d window(s) until shutdown [url = %s]" % (test["fileName"], count, url))
if test["leakedWindowsString"]:
self.logger.info("TEST-INFO | %s | windows(s) leaked: %s" %
(test["fileName"], test["leakedWindowsString"]))
if test["leakedDocShells"]:
self.logger.warning("TEST-UNEXPECTED-FAIL | %s | leaked %d docShell(s) until shutdown" % (
test["fileName"], len(test["leakedDocShells"])))
self.logger.info("TEST-INFO | %s | docShell(s) leaked: %s" % (test["fileName"],
', '.join(["[pid = %s] [id = %s]" % x for x in test["leakedDocShells"]])))
def _logWindow(self, line):
created = line[:2] == "++"
pid = self._parseValue(line, "pid")
serial = self._parseValue(line, "serial")
# log line has invalid format
if not pid or not serial:
self.logger.warning(
"TEST-UNEXPECTED-FAIL | ShutdownLeaks | failed to parse line <%s>" % line)
return
key = (pid, serial)
if self.currentTest:
windows = self.currentTest["windows"]
if created:
windows.add(key)
else:
windows.discard(key)
elif int(pid) in self.seenShutdown and not created:
self.leakedWindows[key] = self._parseValue(line, "url")
def _logDocShell(self, line):
created = line[:2] == "++"
pid = self._parseValue(line, "pid")
id = self._parseValue(line, "id")
# log line has invalid format
if not pid or not id:
self.logger.warning(
"TEST-UNEXPECTED-FAIL | ShutdownLeaks | failed to parse line <%s>" % line)
return
key = (pid, id)
if self.currentTest:
docShells = self.currentTest["docShells"]
if created:
docShells.add(key)
else:
docShells.discard(key)
elif int(pid) in self.seenShutdown and not created:
self.leakedDocShells.add(key)
def _parseValue(self, line, name):
match = re.search("\[%s = (.+?)\]" % name, line)
if match:
return match.group(1)
return None
def _parseLeakingTests(self):
leakingTests = []
for test in self.tests:
leakedWindows = [
id for id in test["windows"] if id in self.leakedWindows]
test["leakedWindows"] = [self.leakedWindows[id]
for id in leakedWindows]
test["leakedWindowsString"] = ', '.join(
["[pid = %s] [serial = %s]" % x for x in leakedWindows])
test["leakedDocShells"] = [
id for id in test["docShells"] if id in self.leakedDocShells]
test["leakCount"] = len(
test["leakedWindows"]) + len(test["leakedDocShells"])
if test["leakCount"]:
leakingTests.append(test)
return sorted(leakingTests, key=itemgetter("leakCount"), reverse=True)
def _zipLeakedWindows(self, leakedWindows):
counts = []
counted = set()
for url in leakedWindows:
if url not in counted:
counts.append((url, leakedWindows.count(url)))
counted.add(url)
return sorted(counts, key=itemgetter(1), reverse=True)
class LSANLeaks(object):
"""
Parses the log when running an LSAN build, looking for interesting stack frames
in allocation stacks, and prints out reports.
"""
def __init__(self, logger):
self.logger = logger
self.inReport = False
self.foundFrames = set([])
self.recordMoreFrames = None
self.currStack = None
self.maxNumRecordedFrames = 4
# Don't various allocation-related stack frames, as they do not help much to
# distinguish different leaks.
unescapedSkipList = [
"malloc", "js_malloc", "malloc_", "__interceptor_malloc", "moz_xmalloc",
"calloc", "js_calloc", "calloc_", "__interceptor_calloc", "moz_xcalloc",
"realloc", "js_realloc", "realloc_", "__interceptor_realloc", "moz_xrealloc",
"new",
"js::MallocProvider",
]
self.skipListRegExp = re.compile(
"^" + "|".join([re.escape(f) for f in unescapedSkipList]) + "$")
self.startRegExp = re.compile(
"==\d+==ERROR: LeakSanitizer: detected memory leaks")
self.stackFrameRegExp = re.compile(" #\d+ 0x[0-9a-f]+ in ([^(</]+)")
self.sysLibStackFrameRegExp = re.compile(
" #\d+ 0x[0-9a-f]+ \(([^+]+)\+0x[0-9a-f]+\)")
def log(self, line):
if re.match(self.startRegExp, line):
self.inReport = True
return
if not self.inReport:
return
if line.startswith("Direct leak") or line.startswith("Indirect leak"):
self._finishStack()
self.recordMoreFrames = True
self.currStack = []
return
if line.startswith("SUMMARY: AddressSanitizer"):
self._finishStack()
self.inReport = False
return
if not self.recordMoreFrames:
return
stackFrame = re.match(self.stackFrameRegExp, line)
if stackFrame:
# Split the frame to remove any return types.
frame = stackFrame.group(1).split()[-1]
if not re.match(self.skipListRegExp, frame):
self._recordFrame(frame)
return
sysLibStackFrame = re.match(self.sysLibStackFrameRegExp, line)
if sysLibStackFrame:
# System library stack frames will never match the skip list,
# so don't bother checking if they do.
self._recordFrame(sysLibStackFrame.group(1))
# If we don't match either of these, just ignore the frame.
# We'll end up with "unknown stack" if everything is ignored.
def process(self):
for f in self.foundFrames:
self.logger.warning(
"TEST-UNEXPECTED-FAIL | LeakSanitizer | leak at " + f)
def _finishStack(self):
if self.recordMoreFrames and len(self.currStack) == 0:
self.currStack = ["unknown stack"]
if self.currStack:
self.foundFrames.add(", ".join(self.currStack))
self.currStack = None
self.recordMoreFrames = False
self.numRecordedFrames = 0
def _recordFrame(self, frame):
self.currStack.append(frame)
self.numRecordedFrames += 1
if self.numRecordedFrames >= self.maxNumRecordedFrames:
self.recordMoreFrames = False