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6d523660e9
This fixes the mutex pretty printer so that, if the owner ID isn't recorded
(such as in the current lock elision implementation), "Owner ID" will be shown
as "Unknown" instead of 0. It also changes the mutex printer output so that it
says "Acquired" instead of "Locked". The mutex tests are updated accordingly.
In addition, this adds a paragraph to the "Known issues" section of the
printers README explaining that the printer output isn't guaranteed to cover
every detail.
2017-01-14 Martin Galvan <martingalvan@sourceware.org>
* README.pretty-printers (Known issues): Warn about printers not
always covering everything.
* nptl/nptl-printers.py (MutexPrinter): Change output.
* nptl/test-mutex-printers.py: Fix test and adapt to changed output.
101 lines
3.6 KiB
Python
101 lines
3.6 KiB
Python
# Tests for the MutexPrinter class.
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#
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# Copyright (C) 2016-2017 Free Software Foundation, Inc.
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# This file is part of the GNU C Library.
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#
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# The GNU C Library is free software; you can redistribute it and/or
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# modify it under the terms of the GNU Lesser General Public
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# License as published by the Free Software Foundation; either
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# version 2.1 of the License, or (at your option) any later version.
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#
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# The GNU C Library is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public
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# License along with the GNU C Library; if not, see
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# <http://www.gnu.org/licenses/>.
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import sys
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from test_printers_common import *
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test_source = sys.argv[1]
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test_bin = sys.argv[2]
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printer_files = sys.argv[3:]
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printer_names = ['global glibc-pthread-locks']
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try:
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init_test(test_bin, printer_files, printer_names)
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go_to_main()
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var = 'mutex'
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to_string = 'pthread_mutex_t'
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break_at(test_source, 'Test status (destroyed)')
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continue_cmd() # Go to test_status_destroyed
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test_printer(var, to_string, {'Status': 'Destroyed'})
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break_at(test_source, 'Test status (non-robust)')
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continue_cmd() # Go to test_status_no_robust
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test_printer(var, to_string, {'Status': 'Not acquired'})
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next_cmd()
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thread_id = get_current_thread_lwpid()
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# Owner ID might be reported either as the thread ID or as "Unknown"
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# (if e.g. lock elision is enabled).
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test_printer(var, to_string,
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{'Status': 'Acquired, possibly with no waiters',
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'Owner ID': r'({0}|Unknown)'.format(thread_id)})
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break_at(test_source, 'Test status (robust)')
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continue_cmd() # Go to test_status_robust
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test_printer(var, to_string, {'Status': 'Not acquired'})
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# We'll now test the robust mutex locking states. We'll create a new
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# thread that will lock a robust mutex and exit without unlocking it.
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break_at(test_source, 'Create')
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continue_cmd() # Go to test_locking_state_robust
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# Set a breakpoint for the new thread to hit.
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break_at(test_source, 'Thread function')
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continue_cmd()
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# By now the new thread is created and has hit its breakpoint.
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set_scheduler_locking(True)
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parent = 1
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child = 2
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select_thread(child)
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child_id = get_current_thread_lwpid()
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# We've got the new thread's ID.
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select_thread(parent)
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# Make the new thread finish its function while we wait.
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continue_cmd(thread=child)
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# The new thread should be dead by now.
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break_at(test_source, 'Test locking (robust)')
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continue_cmd()
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test_printer(var, to_string, {'Owner ID': r'{0} \(dead\)'.format(child_id)})
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# Try to lock and unlock the mutex.
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next_cmd()
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test_printer(var, to_string, {'Owner ID': thread_id,
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'State protected by this mutex': 'Inconsistent'})
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next_cmd()
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test_printer(var, to_string, {'Status': 'Not acquired',
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'State protected by this mutex': 'Not recoverable'})
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set_scheduler_locking(False)
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break_at(test_source, 'Test recursive locks')
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continue_cmd() # Go to test_recursive_locks
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test_printer(var, to_string, {'Times acquired by the owner': '2'})
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next_cmd()
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test_printer(var, to_string, {'Times acquired by the owner': '3'})
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continue_cmd() # Exit
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except (NoLineError, pexpect.TIMEOUT) as exception:
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print('Error: {0}'.format(exception))
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result = FAIL
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else:
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print('Test succeeded.')
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result = PASS
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exit(result)
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