9895b5ca9d
- DTrace scripts to check for errors, performance, ... they serve mostly as examples of what you can do with the static probe;s with moderate load the scripts may be overwhelmed, excessive lock-tracing may influence program behavior (see the last design decission) Design decissions: - use "linuxulator" as the provider for the native bitsize; add the bitsize for the non-native emulation (e.g. "linuxuator32" on amd64) - Add probes only for locks which are acquired in one function and released in another function. Locks which are aquired and released in the same function should be easy to pair in the code, inter-function locking is more easy to verify in DTrace. - Probes for locks should be fired after locking and before releasing to prevent races (to provide data/function stability in DTrace, see the man-page of "dtrace -v ..." and the corresponding DTrace docs).
122 lines
3.9 KiB
C
122 lines
3.9 KiB
C
/*-
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* Copyright (c) 2006 Roman Divacky
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer
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* in this position and unchanged.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _LINUX_EMUL_H_
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#define _LINUX_EMUL_H_
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#define EMUL_SHARED_HASXSTAT 0x01
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struct linux_emuldata_shared {
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int refs;
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int flags;
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int xstat;
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pid_t group_pid;
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LIST_HEAD(, linux_emuldata) threads; /* head of list of linux threads */
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};
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/*
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* modeled after similar structure in NetBSD
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* this will be extended as we need more functionality
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*/
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struct linux_emuldata {
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pid_t pid;
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int *child_set_tid; /* in clone(): Child's TID to set on clone */
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int *child_clear_tid;/* in clone(): Child's TID to clear on exit */
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struct linux_emuldata_shared *shared;
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int pdeath_signal; /* parent death signal */
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int flags; /* different emuldata flags */
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struct linux_robust_list_head *robust_futexes;
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LIST_ENTRY(linux_emuldata) threads; /* list of linux threads */
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};
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struct linux_emuldata *em_find(struct proc *, int locked);
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/*
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* DTrace probes for locks should be fired after locking and before releasing
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* to prevent races (to provide data/function stability in dtrace, see the
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* output of "dtrace -v ..." and the corresponding dtrace docs).
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*/
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#define EMUL_LOCK(l) do { \
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mtx_lock(l); \
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LIN_SDT_PROBE1(locks, emul_lock, \
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locked, l); \
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} while (0)
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#define EMUL_UNLOCK(l) do { \
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LIN_SDT_PROBE1(locks, emul_lock, \
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unlock, l); \
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mtx_unlock(l); \
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} while (0)
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#define EMUL_SHARED_RLOCK(l) do { \
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sx_slock(l); \
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LIN_SDT_PROBE1(locks, emul_shared_rlock, \
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locked, l); \
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} while (0)
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#define EMUL_SHARED_RUNLOCK(l) do { \
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LIN_SDT_PROBE1(locks, emul_shared_rlock, \
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unlock, l); \
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sx_sunlock(l); \
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} while (0)
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#define EMUL_SHARED_WLOCK(l) do { \
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sx_xlock(l); \
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LIN_SDT_PROBE1(locks, emul_shared_wlock, \
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locked, l); \
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} while (0)
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#define EMUL_SHARED_WUNLOCK(l) do { \
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LIN_SDT_PROBE1(locks, emul_shared_wlock, \
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unlock, l); \
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sx_xunlock(l); \
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} while (0)
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/* for em_find use */
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#define EMUL_DOLOCK 1
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#define EMUL_DONTLOCK 0
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/* emuldata flags */
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#define LINUX_XDEPR_REQUEUEOP 0x00000001 /* uses deprecated
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futex REQUEUE op*/
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int linux_proc_init(struct thread *, pid_t, int);
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void linux_proc_exit(void *, struct proc *);
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void linux_schedtail(struct thread *);
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void linux_proc_exec(void *, struct proc *, struct image_params *);
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void linux_kill_threads(struct thread *, int);
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extern struct sx emul_shared_lock;
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extern struct mtx emul_lock;
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#endif /* !_LINUX_EMUL_H_ */
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