362228aad64aa05287c7b5c2122e8b83cadde06f
[WebKit-https.git] / Tools / Scripts / webkitpy / port / driver.py
1 # Copyright (C) 2011 Google Inc. All rights reserved.
2 #
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4 # modification, are permitted provided that the following conditions are
5 # met:
6 #
7 #     * Redistributions of source code must retain the above copyright
8 # notice, this list of conditions and the following disclaimer.
9 #     * Redistributions in binary form must reproduce the above
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11 # in the documentation and/or other materials provided with the
12 # distribution.
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14 # contributors may be used to endorse or promote products derived from
15 # this software without specific prior written permission.
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18 # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
19 # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
20 # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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27 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28
29 import base64
30 import copy
31 import logging
32 import re
33 import shlex
34 import sys
35 import time
36 import os
37
38 from webkitpy.common.system import path
39 from webkitpy.common.system.profiler import ProfilerFactory
40
41
42 _log = logging.getLogger(__name__)
43
44
45 class DriverInput(object):
46     def __init__(self, test_name, timeout, image_hash, should_run_pixel_test, args=None):
47         self.test_name = test_name
48         self.timeout = timeout  # in ms
49         self.image_hash = image_hash
50         self.should_run_pixel_test = should_run_pixel_test
51         self.args = args or []
52
53
54 class DriverOutput(object):
55     """Groups information about a output from driver for easy passing
56     and post-processing of data."""
57
58     strip_patterns = []
59     strip_patterns.append((re.compile('at \(-?[0-9]+,-?[0-9]+\) *'), ''))
60     strip_patterns.append((re.compile('size -?[0-9]+x-?[0-9]+ *'), ''))
61     strip_patterns.append((re.compile('text run width -?[0-9]+: '), ''))
62     strip_patterns.append((re.compile('text run width -?[0-9]+ [a-zA-Z ]+: '), ''))
63     strip_patterns.append((re.compile('RenderButton {BUTTON} .*'), 'RenderButton {BUTTON}'))
64     strip_patterns.append((re.compile('RenderImage {INPUT} .*'), 'RenderImage {INPUT}'))
65     strip_patterns.append((re.compile('RenderBlock {INPUT} .*'), 'RenderBlock {INPUT}'))
66     strip_patterns.append((re.compile('RenderTextControl {INPUT} .*'), 'RenderTextControl {INPUT}'))
67     strip_patterns.append((re.compile('\([0-9]+px'), 'px'))
68     strip_patterns.append((re.compile(' *" *\n +" *'), ' '))
69     strip_patterns.append((re.compile('" +$'), '"'))
70     strip_patterns.append((re.compile('- '), '-'))
71     strip_patterns.append((re.compile('\n( *)"\s+'), '\n\g<1>"'))
72     strip_patterns.append((re.compile('\s+"\n'), '"\n'))
73     strip_patterns.append((re.compile('scrollWidth [0-9]+'), 'scrollWidth'))
74     strip_patterns.append((re.compile('scrollHeight [0-9]+'), 'scrollHeight'))
75     strip_patterns.append((re.compile('scrollX [0-9]+'), 'scrollX'))
76     strip_patterns.append((re.compile('scrollY [0-9]+'), 'scrollY'))
77     strip_patterns.append((re.compile('scrolled to [0-9]+,[0-9]+'), 'scrolled'))
78
79     def __init__(self, text, image, image_hash, audio, crash=False,
80             test_time=0, measurements=None, timeout=False, error='', crashed_process_name='??',
81             crashed_pid=None, crash_log=None, pid=None):
82         # FIXME: Args could be renamed to better clarify what they do.
83         self.text = text
84         self.image = image  # May be empty-string if the test crashes.
85         self.image_hash = image_hash
86         self.image_diff = None  # image_diff gets filled in after construction.
87         self.audio = audio  # Binary format is port-dependent.
88         self.crash = crash
89         self.crashed_process_name = crashed_process_name
90         self.crashed_pid = crashed_pid
91         self.crash_log = crash_log
92         self.test_time = test_time
93         self.measurements = measurements
94         self.timeout = timeout
95         self.error = error  # stderr output
96         self.pid = pid
97
98     def has_stderr(self):
99         return bool(self.error)
100
101     def strip_metrics(self):
102         if not self.text:
103             return
104         for pattern in self.strip_patterns:
105             self.text = re.sub(pattern[0], pattern[1], self.text)
106
107
108 class Driver(object):
109     """object for running test(s) using DumpRenderTree/WebKitTestRunner."""
110
111     def __init__(self, port, worker_number, pixel_tests, no_timeout=False):
112         """Initialize a Driver to subsequently run tests.
113
114         Typically this routine will spawn DumpRenderTree in a config
115         ready for subsequent input.
116
117         port - reference back to the port object.
118         worker_number - identifier for a particular worker/driver instance
119         """
120         self._port = port
121         self._worker_number = worker_number
122         self._no_timeout = no_timeout
123
124         self._driver_tempdir = None
125         # WebKitTestRunner can report back subprocess crashes by printing
126         # "#CRASHED - PROCESSNAME".  Since those can happen at any time
127         # and ServerProcess won't be aware of them (since the actual tool
128         # didn't crash, just a subprocess) we record the crashed subprocess name here.
129         self._crashed_process_name = None
130         self._crashed_pid = None
131
132         # WebKitTestRunner can report back subprocesses that became unresponsive
133         # This could mean they crashed.
134         self._subprocess_was_unresponsive = False
135
136         # stderr reading is scoped on a per-test (not per-block) basis, so we store the accumulated
137         # stderr output, as well as if we've seen #EOF on this driver instance.
138         # FIXME: We should probably remove _read_first_block and _read_optional_image_block and
139         # instead scope these locally in run_test.
140         self.error_from_test = str()
141         self.err_seen_eof = False
142         self._server_process = None
143
144         self._measurements = {}
145         if self._port.get_option("profile"):
146             profiler_name = self._port.get_option("profiler")
147             self._profiler = ProfilerFactory.create_profiler(self._port.host,
148                 self._port._path_to_driver(), self._port.results_directory(), profiler_name)
149         else:
150             self._profiler = None
151
152     def __del__(self):
153         self.stop()
154
155     def run_test(self, driver_input, stop_when_done):
156         """Run a single test and return the results.
157
158         Note that it is okay if a test times out or crashes and leaves
159         the driver in an indeterminate state. The upper layers of the program
160         are responsible for cleaning up and ensuring things are okay.
161
162         Returns a DriverOutput object.
163         """
164         start_time = time.time()
165         self.start(driver_input.should_run_pixel_test, driver_input.args)
166         test_begin_time = time.time()
167         self.error_from_test = str()
168         self.err_seen_eof = False
169
170         command = self._command_from_driver_input(driver_input)
171         deadline = test_begin_time + int(driver_input.timeout) / 1000.0
172
173         self._server_process.write(command)
174         text, audio = self._read_first_block(deadline)  # First block is either text or audio
175         image, actual_image_hash = self._read_optional_image_block(deadline)  # The second (optional) block is image data.
176
177         crashed = self.has_crashed()
178         timed_out = self._server_process.timed_out
179         pid = self._server_process.pid()
180
181         if stop_when_done or crashed or timed_out:
182             # We call stop() even if we crashed or timed out in order to get any remaining stdout/stderr output.
183             # In the timeout case, we kill the hung process as well.
184             out, err = self._server_process.stop(self._port.driver_stop_timeout() if stop_when_done else 0.0)
185             if out:
186                 text += out
187             if err:
188                 self.error_from_test += err
189             self._server_process = None
190
191         crash_log = None
192         if crashed:
193             self.error_from_test, crash_log = self._get_crash_log(text, self.error_from_test, newer_than=start_time)
194
195             # If we don't find a crash log use a placeholder error message instead.
196             if not crash_log:
197                 pid_str = str(self._crashed_pid) if self._crashed_pid else "unknown pid"
198                 crash_log = 'No crash log found for %s:%s.\n' % (self._crashed_process_name, pid_str)
199                 # If we were unresponsive append a message informing there may not have been a crash.
200                 if self._subprocess_was_unresponsive:
201                     crash_log += 'Process failed to become responsive before timing out.\n'
202
203                 # Print stdout and stderr to the placeholder crash log; we want as much context as possible.
204                 if self.error_from_test:
205                     crash_log += '\nstdout:\n%s\nstderr:\n%s\n' % (text, self.error_from_test)
206
207         return DriverOutput(text, image, actual_image_hash, audio,
208             crash=crashed, test_time=time.time() - test_begin_time, measurements=self._measurements,
209             timeout=timed_out, error=self.error_from_test,
210             crashed_process_name=self._crashed_process_name,
211             crashed_pid=self._crashed_pid, crash_log=crash_log, pid=pid)
212
213     def _get_crash_log(self, stdout, stderr, newer_than):
214         return self._port._get_crash_log(self._crashed_process_name, self._crashed_pid, stdout, stderr, newer_than)
215
216     def _command_wrapper(self):
217         # Hook for injecting valgrind or other runtime instrumentation, used by e.g. tools/valgrind/valgrind_tests.py.
218         if self._port.get_option('wrapper'):
219             return shlex.split(self._port.get_option('wrapper'))
220         if self._profiler:
221             return self._profiler.wrapper_arguments()
222         return []
223
224     HTTP_DIR = "http/tests/"
225     HTTP_LOCAL_DIR = "http/tests/local/"
226
227     def is_http_test(self, test_name):
228         return test_name.startswith(self.HTTP_DIR) and not test_name.startswith(self.HTTP_LOCAL_DIR)
229
230     def test_to_uri(self, test_name):
231         """Convert a test name to a URI."""
232         if not self.is_http_test(test_name):
233             return path.abspath_to_uri(self._port.host.platform, self._port.abspath_for_test(test_name))
234
235         relative_path = test_name[len(self.HTTP_DIR):]
236
237         # TODO(dpranke): remove the SSL reference?
238         if relative_path.startswith("ssl/"):
239             return "https://127.0.0.1:8443/" + relative_path
240         return "http://127.0.0.1:8000/" + relative_path
241
242     def uri_to_test(self, uri):
243         """Return the base layout test name for a given URI.
244
245         This returns the test name for a given URI, e.g., if you passed in
246         "file:///src/LayoutTests/fast/html/keygen.html" it would return
247         "fast/html/keygen.html".
248
249         """
250         if uri.startswith("file:///"):
251             prefix = path.abspath_to_uri(self._port.host.platform, self._port.layout_tests_dir())
252             if not prefix.endswith('/'):
253                 prefix += '/'
254             return uri[len(prefix):]
255         if uri.startswith("http://"):
256             return uri.replace('http://127.0.0.1:8000/', self.HTTP_DIR)
257         if uri.startswith("https://"):
258             return uri.replace('https://127.0.0.1:8443/', self.HTTP_DIR)
259         raise NotImplementedError('unknown url type: %s' % uri)
260
261     def has_crashed(self):
262         if self._server_process is None:
263             return False
264         if self._crashed_process_name:
265             return True
266         if self._server_process.has_crashed():
267             self._crashed_process_name = self._server_process.name()
268             self._crashed_pid = self._server_process.pid()
269             return True
270         return False
271
272     def start(self, pixel_tests, per_test_args):
273         # FIXME: Callers shouldn't normally call this, since this routine
274         # may not be specifying the correct combination of pixel test and
275         # per_test args.
276         #
277         # The only reason we have this routine at all is so the perftestrunner
278         # can pause before running a test; it might be better to push that
279         # into run_test() directly.
280         if not self._server_process:
281             self._start(pixel_tests, per_test_args)
282             self._run_post_start_tasks()
283
284     def _setup_environ_for_driver(self, environment):
285         environment['DYLD_LIBRARY_PATH'] = self._port._build_path()
286         environment['DYLD_FRAMEWORK_PATH'] = self._port._build_path()
287         # FIXME: We're assuming that WebKitTestRunner checks this DumpRenderTree-named environment variable.
288         # FIXME: Commented out for now to avoid tests breaking. Re-enable after
289         # we cut over to NRWT
290         #environment['DUMPRENDERTREE_TEMP'] = str(self._port._driver_tempdir_for_environment())
291         environment['DUMPRENDERTREE_TEMP'] = str(self._driver_tempdir)
292         environment['LOCAL_RESOURCE_ROOT'] = self._port.layout_tests_dir()
293         if 'WEBKIT_OUTPUTDIR' in os.environ:
294             environment['WEBKIT_OUTPUTDIR'] = os.environ['WEBKIT_OUTPUTDIR']
295         if self._profiler:
296             environment = self._profiler.adjusted_environment(environment)
297         return environment
298
299     def _start(self, pixel_tests, per_test_args):
300         self.stop()
301         self._driver_tempdir = self._port._driver_tempdir()
302         server_name = self._port.driver_name()
303         environment = self._port.setup_environ_for_server(server_name)
304         environment = self._setup_environ_for_driver(environment)
305         self._crashed_process_name = None
306         self._crashed_pid = None
307         self._server_process = self._port._server_process_constructor(self._port, server_name, self.cmd_line(pixel_tests, per_test_args), environment)
308         self._server_process.start()
309
310     def _run_post_start_tasks(self):
311         # Remote drivers may override this to delay post-start tasks until the server has ack'd.
312         if self._profiler:
313             self._profiler.attach_to_pid(self._pid_on_target())
314
315     def _pid_on_target(self):
316         # Remote drivers will override this method to return the pid on the device.
317         return self._server_process.pid()
318
319     def stop(self):
320         if self._server_process:
321             self._server_process.stop(self._port.driver_stop_timeout())
322             self._server_process = None
323             if self._profiler:
324                 self._profiler.profile_after_exit()
325
326         if self._driver_tempdir:
327             self._port._filesystem.rmtree(str(self._driver_tempdir))
328             self._driver_tempdir = None
329
330     def cmd_line(self, pixel_tests, per_test_args):
331         cmd = self._command_wrapper()
332         cmd.append(self._port._path_to_driver())
333         if self._port.get_option('gc_between_tests'):
334             cmd.append('--gc-between-tests')
335         if self._port.get_option('complex_text'):
336             cmd.append('--complex-text')
337         if self._port.get_option('threaded'):
338             cmd.append('--threaded')
339         if self._no_timeout:
340             cmd.append('--no-timeout')
341         # FIXME: We need to pass --timeout=SECONDS to WebKitTestRunner for WebKit2.
342
343         cmd.extend(self._port.get_option('additional_drt_flag', []))
344         cmd.extend(self._port.additional_drt_flag())
345
346         cmd.extend(per_test_args)
347
348         cmd.append('-')
349         return cmd
350
351     def _check_for_driver_crash(self, error_line):
352         if error_line == "#CRASHED\n":
353             # This is used on Windows to report that the process has crashed
354             # See http://trac.webkit.org/changeset/65537.
355             self._crashed_process_name = self._server_process.name()
356             self._crashed_pid = self._server_process.pid()
357         elif (error_line.startswith("#CRASHED - ")
358             or error_line.startswith("#PROCESS UNRESPONSIVE - ")):
359             # WebKitTestRunner uses this to report that the WebProcess subprocess crashed.
360             match = re.match('#(?:CRASHED|PROCESS UNRESPONSIVE) - (\S+)', error_line)
361             self._crashed_process_name = match.group(1) if match else 'WebProcess'
362             match = re.search('pid (\d+)', error_line)
363             pid = int(match.group(1)) if match else None
364             self._crashed_pid = pid
365             # FIXME: delete this after we're sure this code is working :)
366             _log.debug('%s crash, pid = %s, error_line = %s' % (self._crashed_process_name, str(pid), error_line))
367             if error_line.startswith("#PROCESS UNRESPONSIVE - "):
368                 self._subprocess_was_unresponsive = True
369                 self._port.sample_process(self._crashed_process_name, self._crashed_pid)
370                 # We want to show this since it's not a regular crash and probably we don't have a crash log.
371                 self.error_from_test += error_line
372             return True
373         return self.has_crashed()
374
375     def _command_from_driver_input(self, driver_input):
376         # FIXME: performance tests pass in full URLs instead of test names.
377         if driver_input.test_name.startswith('http://') or driver_input.test_name.startswith('https://')  or driver_input.test_name == ('about:blank'):
378             command = driver_input.test_name
379         elif self.is_http_test(driver_input.test_name):
380             command = self.test_to_uri(driver_input.test_name)
381         else:
382             command = self._port.abspath_for_test(driver_input.test_name)
383             if sys.platform == 'cygwin':
384                 command = path.cygpath(command)
385
386         assert not driver_input.image_hash or driver_input.should_run_pixel_test
387
388         # ' is the separator between arguments.
389         if self._port.supports_per_test_timeout():
390             command += "'--timeout'%s" % driver_input.timeout
391         if driver_input.should_run_pixel_test:
392             command += "'--pixel-test"
393         if driver_input.image_hash:
394             command += "'" + driver_input.image_hash
395         return command + "\n"
396
397     def _read_first_block(self, deadline):
398         # returns (text_content, audio_content)
399         block = self._read_block(deadline)
400         if block.malloc:
401             self._measurements['Malloc'] = float(block.malloc)
402         if block.js_heap:
403             self._measurements['JSHeap'] = float(block.js_heap)
404         if block.content_type == 'audio/wav':
405             return (None, block.decoded_content)
406         return (block.decoded_content, None)
407
408     def _read_optional_image_block(self, deadline):
409         # returns (image, actual_image_hash)
410         block = self._read_block(deadline, wait_for_stderr_eof=True)
411         if block.content and block.content_type == 'image/png':
412             return (block.decoded_content, block.content_hash)
413         return (None, block.content_hash)
414
415     def _read_header(self, block, line, header_text, header_attr, header_filter=None):
416         if line.startswith(header_text) and getattr(block, header_attr) is None:
417             value = line.split()[1]
418             if header_filter:
419                 value = header_filter(value)
420             setattr(block, header_attr, value)
421             return True
422         return False
423
424     def _process_stdout_line(self, block, line):
425         if (self._read_header(block, line, 'Content-Type: ', 'content_type')
426             or self._read_header(block, line, 'Content-Transfer-Encoding: ', 'encoding')
427             or self._read_header(block, line, 'Content-Length: ', '_content_length', int)
428             or self._read_header(block, line, 'ActualHash: ', 'content_hash')
429             or self._read_header(block, line, 'DumpMalloc: ', 'malloc')
430             or self._read_header(block, line, 'DumpJSHeap: ', 'js_heap')):
431             return
432         # Note, we're not reading ExpectedHash: here, but we could.
433         # If the line wasn't a header, we just append it to the content.
434         block.content += line
435
436     def _strip_eof(self, line):
437         if line and line.endswith("#EOF\n"):
438             return line[:-5], True
439         return line, False
440
441     def _read_block(self, deadline, wait_for_stderr_eof=False):
442         block = ContentBlock()
443         out_seen_eof = False
444
445         while not self.has_crashed():
446             if out_seen_eof and (self.err_seen_eof or not wait_for_stderr_eof):
447                 break
448
449             if self.err_seen_eof:
450                 out_line = self._server_process.read_stdout_line(deadline)
451                 err_line = None
452             elif out_seen_eof:
453                 out_line = None
454                 err_line = self._server_process.read_stderr_line(deadline)
455             else:
456                 out_line, err_line = self._server_process.read_either_stdout_or_stderr_line(deadline)
457
458             if self._server_process.timed_out or self.has_crashed():
459                 break
460
461             if out_line:
462                 assert not out_seen_eof
463                 out_line, out_seen_eof = self._strip_eof(out_line)
464             if err_line:
465                 assert not self.err_seen_eof
466                 err_line, self.err_seen_eof = self._strip_eof(err_line)
467
468             if out_line:
469                 if out_line[-1] != "\n":
470                     _log.error("Last character read from DRT stdout line was not a newline!  This indicates either a NRWT or DRT bug.")
471                 content_length_before_header_check = block._content_length
472                 self._process_stdout_line(block, out_line)
473                 # FIXME: Unlike HTTP, DRT dumps the content right after printing a Content-Length header.
474                 # Don't wait until we're done with headers, just read the binary blob right now.
475                 if content_length_before_header_check != block._content_length:
476                     block.content = self._server_process.read_stdout(deadline, block._content_length)
477
478             if err_line:
479                 if self._check_for_driver_crash(err_line):
480                     break
481                 self.error_from_test += err_line
482
483         block.decode_content()
484         return block
485
486
487 class ContentBlock(object):
488     def __init__(self):
489         self.content_type = None
490         self.encoding = None
491         self.content_hash = None
492         self._content_length = None
493         # Content is treated as binary data even though the text output is usually UTF-8.
494         self.content = str()  # FIXME: Should be bytearray() once we require Python 2.6.
495         self.decoded_content = None
496         self.malloc = None
497         self.js_heap = None
498
499     def decode_content(self):
500         if self.encoding == 'base64' and self.content is not None:
501             self.decoded_content = base64.b64decode(self.content)
502         else:
503             self.decoded_content = self.content
504
505 class DriverProxy(object):
506     """A wrapper for managing two Driver instances, one with pixel tests and
507     one without. This allows us to handle plain text tests and ref tests with a
508     single driver."""
509
510     def __init__(self, port, worker_number, driver_instance_constructor, pixel_tests, no_timeout):
511         self._port = port
512         self._worker_number = worker_number
513         self._driver_instance_constructor = driver_instance_constructor
514         self._no_timeout = no_timeout
515
516         # FIXME: We shouldn't need to create a driver until we actually run a test.
517         self._driver = self._make_driver(pixel_tests)
518         self._driver_cmd_line = None
519
520     def _make_driver(self, pixel_tests):
521         return self._driver_instance_constructor(self._port, self._worker_number, pixel_tests, self._no_timeout)
522
523     # FIXME: this should be a @classmethod (or implemented on Port instead).
524     def is_http_test(self, test_name):
525         return self._driver.is_http_test(test_name)
526
527     # FIXME: this should be a @classmethod (or implemented on Port instead).
528     def test_to_uri(self, test_name):
529         return self._driver.test_to_uri(test_name)
530
531     # FIXME: this should be a @classmethod (or implemented on Port instead).
532     def uri_to_test(self, uri):
533         return self._driver.uri_to_test(uri)
534
535     def run_test(self, driver_input, stop_when_done):
536         base = self._port.lookup_virtual_test_base(driver_input.test_name)
537         if base:
538             virtual_driver_input = copy.copy(driver_input)
539             virtual_driver_input.test_name = base
540             virtual_driver_input.args = self._port.lookup_virtual_test_args(driver_input.test_name)
541             return self.run_test(virtual_driver_input, stop_when_done)
542
543         pixel_tests_needed = driver_input.should_run_pixel_test
544         cmd_line_key = self._cmd_line_as_key(pixel_tests_needed, driver_input.args)
545         if cmd_line_key != self._driver_cmd_line:
546             self._driver.stop()
547             self._driver = self._make_driver(pixel_tests_needed)
548             self._driver_cmd_line = cmd_line_key
549
550         return self._driver.run_test(driver_input, stop_when_done)
551
552     def has_crashed(self):
553         return self._driver.has_crashed()
554
555     def stop(self):
556         self._driver.stop()
557
558     # FIXME: this should be a @classmethod (or implemented on Port instead).
559     def cmd_line(self, pixel_tests=None, per_test_args=None):
560         return self._driver.cmd_line(pixel_tests, per_test_args or [])
561
562     def _cmd_line_as_key(self, pixel_tests, per_test_args):
563         return ' '.join(self.cmd_line(pixel_tests, per_test_args))