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check_error.d
(6.64 KB)
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check_internal_locks.d
(2.76 KB)
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linux.c
(14.39 KB)
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linux.h
(6.4 KB)
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linux_common.c
(2.9 KB)
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linux_common.h
(1.92 KB)
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linux_dtrace.h
(3.97 KB)
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linux_dummy.c
(4.14 KB)
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linux_emul.c
(9.98 KB)
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linux_emul.h
(3.1 KB)
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linux_errno.c
(756 B)
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linux_errno.h
(5.09 KB)
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linux_errno.inc
(9.59 KB)
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linux_event.c
(24.96 KB)
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linux_event.h
(2.69 KB)
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linux_file.c
(49.59 KB)
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linux_file.h
(5.82 KB)
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linux_fork.c
(10.39 KB)
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linux_futex.c
(38 KB)
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linux_futex.h
(3.66 KB)
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linux_getcwd.c
(2.83 KB)
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linux_ioctl.c
(92.74 KB)
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linux_ioctl.h
(26.02 KB)
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linux_ipc.c
(23.99 KB)
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linux_ipc.h
(2.92 KB)
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linux_ipc64.h
(4.81 KB)
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linux_mib.c
(14.93 KB)
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linux_mib.h
(2.59 KB)
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linux_misc.c
(59.03 KB)
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linux_misc.h
(6.12 KB)
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linux_mmap.c
(12.67 KB)
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linux_mmap.h
(2.75 KB)
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linux_persona.h
(1.36 KB)
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linux_signal.c
(16.55 KB)
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linux_signal.h
(2.27 KB)
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linux_socket.c
(57.3 KB)
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linux_socket.h
(9.15 KB)
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linux_stats.c
(19.74 KB)
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linux_sysctl.c
(5.6 KB)
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linux_sysproto.h
(1.64 KB)
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linux_time.c
(18.39 KB)
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linux_timer.c
(4.73 KB)
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linux_timer.h
(3.88 KB)
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linux_uid16.c
(12.24 KB)
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linux_util.c
(8.21 KB)
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linux_util.h
(6.18 KB)
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linux_vdso.c
(6.29 KB)
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linux_vdso.h
(2.3 KB)
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linux_videodev2_compat.h
(2.98 KB)
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linux_videodev_compat.h
(1.07 KB)
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stats_timing.d
(3.09 KB)
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trace_futexes.d
(5.48 KB)
Editing: check_internal_locks.d
#!/usr/sbin/dtrace -qs /*- * Copyright (c) 2008-2012 Alexander Leidinger <netchild@FreeBSD.org> * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions and the following disclaimer * in this position and unchanged. * 2. Redistributions in binary form must reproduce the above copyright * notice, this list of conditions and the following disclaimer in the * documentation and/or other materials provided with the distribution. * * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. * * $FreeBSD$ */ /** * Check if the internal locks are correctly acquired/released: * - no recursive locking (mtx locks, write locks) * - no unlocking of already unlocked one * * Print stacktrace if a lock is longer locked than about 10sec or more. */ #pragma D option dynvarsize=32m #pragma D option specsize=32m BEGIN { check["futex_mtx"] = 0; } linuxulator*:locks:futex_mtx:locked /check[probefunc] > 0/ { printf("ERROR: recursive lock of %s (%p),", probefunc, arg0); printf(" or missing SDT probe in kernel. Stack trace follows:"); stack(); } linuxulator*:locks:futex_mtx:locked { ++check[probefunc]; @stats[probefunc] = count(); ts[probefunc] = timestamp; spec[probefunc] = speculation(); } linuxulator*:locks:futex_mtx:unlock /check[probefunc] == 0/ { printf("ERROR: unlock attempt of unlocked %s (%p),", probefunc, arg0); printf(" missing SDT probe in kernel, or dtrace program started"); printf(" while the %s was already held (race condition).", probefunc); printf(" Stack trace follows:"); stack(); } linuxulator*:locks:futex_mtx:unlock { discard(spec[probefunc]); spec[probefunc] = 0; --check[probefunc]; } /* Timeout handling */ tick-10s /spec["futex_mtx"] != 0 && timestamp - ts["futex_mtx"] >= 9999999000/ { commit(spec["futex_mtx"]); spec["futex_mtx"] = 0; } /* Statistics */ END { printf("Number of locks per type:"); printa(@stats); }
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