1715f07da3
class to trace witness events. - Make the ktr_cpu field of ktr_entry be a standard field rather than one present only in the KTR_EXTEND case. - Move the default definition of KTR_ENTRIES from sys/ktr.h to kern/kern_ktr.c. It has not been needed in the header file since KTR was un-inlined. - Minor include cleanup in kern/kern_ktr.c. - Fiddle with the ktr_cpumask in ktr_tracepoint() to disable KTR events on the current CPU while we are processing an event. - Set the current CPU inside of the critical section to ensure we don't migrate CPU's after the critical section but before we set the CPU.
203 lines
6.7 KiB
C
203 lines
6.7 KiB
C
/*-
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* Copyright (c) 1996 Berkeley Software Design, Inc. 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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* 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. Berkeley Software Design Inc's name may not be used to endorse or
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* promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY BERKELEY SOFTWARE DESIGN INC ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL BERKELEY SOFTWARE DESIGN INC BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* from BSDI $Id: ktr.h,v 1.10.2.7 2000/03/16 21:44:42 cp Exp $
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* $FreeBSD$
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*/
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/*
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* Wraparound kernel trace buffer support.
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*/
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#ifndef _SYS_KTR_H_
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#define _SYS_KTR_H_
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/* Requires sys/types.h, sys/time.h, machine/atomic.h, and machine/cpufunc.h */
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#include <machine/atomic.h>
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#include <machine/cpufunc.h>
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/*
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* Trace classes
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*/
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#define KTR_GEN 0x00000001 /* General (TR) */
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#define KTR_NET 0x00000002 /* Network */
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#define KTR_DEV 0x00000004 /* Device driver */
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#define KTR_LOCK 0x00000008 /* MP locking */
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#define KTR_SMP 0x00000010 /* MP general */
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#define KTR_FS 0x00000020 /* Filesystem */
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#define KTR_PMAP 0x00000040 /* Pmap tracing */
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#define KTR_MALLOC 0x00000080 /* Malloc tracing */
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#define KTR_TRAP 0x00000100 /* Trap processing */
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#define KTR_INTR 0x00000200 /* Interrupt tracing */
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#define KTR_SIG 0x00000400 /* Signal processing */
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#define KTR_CLK 0x00000800 /* hardclock verbose */
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#define KTR_PROC 0x00001000 /* Process scheduling */
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#define KTR_SYSC 0x00002000 /* System call */
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#define KTR_INIT 0x00004000 /* System initialization */
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#define KTR_KGDB 0x00008000 /* Trace kgdb internals */
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#define KTR_IO 0x00010000 /* Upper I/O */
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#define KTR_LOCKMGR 0x00020000
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#define KTR_NFS 0x00040000 /* The obvious */
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#define KTR_VOP 0x00080000 /* The obvious */
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#define KTR_VM 0x00100000 /* The virtual memory system */
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#define KTR_WITNESS 0x00200000
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#define KTR_RUNQ 0x00400000 /* Run queue */
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#define KTR_ALL 0x007fffff
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/*
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* Trace classes which can be assigned to particular use at compile time
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* These must remain in high 22 as some assembly code counts on it
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*/
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#define KTR_CT1 0x010000000
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#define KTR_CT2 0x020000000
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#define KTR_CT3 0x040000000
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#define KTR_CT4 0x080000000
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#define KTR_CT5 0x100000000
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#define KTR_CT6 0x200000000
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#define KTR_CT7 0x400000000
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#define KTR_CT8 0x800000000
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/* Trace classes to compile in */
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#ifndef KTR_COMPILE
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#define KTR_COMPILE (KTR_GEN)
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#endif
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#ifndef LOCORE
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#include <sys/time.h>
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#ifndef KTRDESCSIZE
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#define KTRDESCSIZE 80
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#endif
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struct ktr_entry {
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struct timespec ktr_tv;
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int ktr_cpu;
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#ifdef KTR_EXTEND
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char ktr_desc[KTRDESCSIZE];
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const char *ktr_filename;
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int ktr_line;
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#else
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const char *ktr_desc;
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u_long ktr_parm1;
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u_long ktr_parm2;
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u_long ktr_parm3;
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u_long ktr_parm4;
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u_long ktr_parm5;
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#endif
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};
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/* These variables are used by gdb to analyse the output */
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extern int ktr_extend;
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extern int ktr_cpumask;
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extern int ktr_mask;
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extern int ktr_entries;
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extern int ktr_verbose;
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extern volatile int ktr_idx;
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extern struct ktr_entry ktr_buf[];
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#endif /* !LOCORE */
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#ifdef KTR
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#ifdef KTR_EXTEND
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void ktr_tracepoint(u_int mask, const char *filename, u_int line,
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const char *format, ...) __printflike(4, 5);
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#else
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void ktr_tracepoint(u_int mask, const char *format, u_long arg1, u_long arg2,
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u_long arg3, u_long arg4, u_long arg5);
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#endif
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#ifdef KTR_EXTEND
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#define CTR(m, format, args...) do { \
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if (KTR_COMPILE & (m)) \
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ktr_tracepoint((m), __FILE__, __LINE__, format , ##args); \
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} while(0)
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#define CTR0(m, format) CTR(m, format)
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#define CTR1(m, format, p1) CTR(m, format, p1)
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#define CTR2(m, format, p1, p2) CTR(m, format, p1, p2)
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#define CTR3(m, format, p1, p2, p3) CTR(m, format, p1, p2, p3)
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#define CTR4(m, format, p1, p2, p3, p4) CTR(m, format, p1, p2, p3, p4)
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#define CTR5(m, format, p1, p2, p3, p4, p5) \
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CTR(m, format, p1, p2, p3, p4, p5)
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#else /* not extended */
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#define CTR5(m, format, p1, p2, p3, p4, p5) do { \
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if (KTR_COMPILE & (m)) \
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ktr_tracepoint((m), format, (u_long)p1, (u_long)p2, \
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(u_long)p3, (u_long)p4, (u_long)p5); \
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} while(0)
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#define CTR0(m, format) CTR5(m, format, 0, 0, 0, 0, 0)
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#define CTR1(m, format, p1) CTR5(m, format, p1, 0, 0, 0, 0)
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#define CTR2(m, format, p1, p2) CTR5(m, format, p1, p2, 0, 0, 0)
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#define CTR3(m, format, p1, p2, p3) CTR5(m, format, p1, p2, p3, 0, 0)
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#define CTR4(m, format, p1, p2, p3, p4) CTR5(m, format, p1, p2, p3, p4, 0)
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#endif /* KTR_EXTEND */
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#else /* KTR */
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#undef KTR_COMPILE
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#define KTR_COMPILE 0
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#define CTR0(m, d)
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#define CTR1(m, d, p1)
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#define CTR2(m, d, p1, p2)
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#define CTR3(m, d, p1, p2, p3)
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#define CTR4(m, d, p1, p2, p3, p4)
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#define CTR5(m, d, p1, p2, p3, p4, p5)
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#endif /* KTR */
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#define TR0(d) CTR0(KTR_GEN, d)
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#define TR1(d, p1) CTR1(KTR_GEN, d, p1)
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#define TR2(d, p1, p2) CTR2(KTR_GEN, d, p1, p2)
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#define TR3(d, p1, p2, p3) CTR3(KTR_GEN, d, p1, p2, p3)
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#define TR4(d, p1, p2, p3, p4) CTR4(KTR_GEN, d, p1, p2, p3, p4)
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#define TR5(d, p1, p2, p3, p4, p5) CTR5(KTR_GEN, d, p1, p2, p3, p4, p5)
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/*
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* Trace initialization events, similar to CTR with KTR_INIT, but
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* completely ifdef'ed out if KTR_INIT isn't in KTR_COMPILE (to
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* save string space, the compiler doesn't optimize out strings
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* for the conditional ones above).
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*/
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#if (KTR_COMPILE & KTR_INIT) != 0
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#define ITR0(d) CTR0(KTR_INIT, d)
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#define ITR1(d, p1) CTR1(KTR_INIT, d, p1)
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#define ITR2(d, p1, p2) CTR2(KTR_INIT, d, p1, p2)
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#define ITR3(d, p1, p2, p3) CTR3(KTR_INIT, d, p1, p2, p3)
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#define ITR4(d, p1, p2, p3, p4) CTR4(KTR_INIT, d, p1, p2, p3, p4)
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#define ITR5(d, p1, p2, p3, p4, p5) CTR5(KTR_INIT, d, p1, p2, p3, p4, p5)
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#else
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#define ITR0(d)
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#define ITR1(d, p1)
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#define ITR2(d, p1, p2)
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#define ITR3(d, p1, p2, p3)
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#define ITR4(d, p1, p2, p3, p4)
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#define ITR5(d, p1, p2, p3, p4, p5)
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#endif
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#endif /* !_SYS_KTR_H_ */
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