Date: Thu, 24 Jan 2008 23:09:10 GMT From: John Birrell <jb@FreeBSD.org> To: Perforce Change Reviews <perforce@freebsd.org> Subject: PERFORCE change 134038 for review Message-ID: <200801242309.m0ON9AUX025918@repoman.freebsd.org>
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http://perforce.freebsd.org/chv.cgi?CH=134038 Change 134038 by jb@jb_freebsd1 on 2008/01/24 23:08:44 Q: Who traces the tracer? A: printfs! ... enabled via a sysctl. Affected files ... .. //depot/projects/dtrace/src/sys/cddl/dev/dtrace/dtrace_ioctl.c#17 edit Differences ... ==== //depot/projects/dtrace/src/sys/cddl/dev/dtrace/dtrace_ioctl.c#17 (text+ko) ==== @@ -22,6 +22,11 @@ * */ +static int dtrace_verbose_ioctl; +SYSCTL_INT(_debug_dtrace, OID_AUTO, verbose_ioctl, CTLFLAG_RW, &dtrace_verbose_ioctl, 0, ""); + +#define DTRACE_IOCTL_PRINTF(fmt, ...) if (dtrace_verbose_ioctl) printf(fmt, ## __VA_ARGS__ ) + /* ARGSUSED */ static int dtrace_ioctl(struct cdev *dev, u_long cmd, caddr_t addr, @@ -62,6 +67,8 @@ size_t size; uintptr_t dest; + DTRACE_IOCTL_PRINTF("%s(%d): DTRACEIOC_AGGDESC\n",__func__,__LINE__); + if (copyin((void *) *paggdesc, &aggdesc, sizeof (aggdesc)) != 0) return (EFAULT); @@ -159,9 +166,17 @@ caddr_t cached; dtrace_buffer_t *buf; + dtrace_debug_output(); + if (copyin((void *) *pdesc, &desc, sizeof (desc)) != 0) return (EFAULT); + DTRACE_IOCTL_PRINTF("%s(%d): %s curcpu %d cpu %d\n", + __func__,__LINE__, + cmd == DTRACEIOC_AGGSNAP ? + "DTRACEIOC_AGGSNAP":"DTRACEIOC_BUFSNAP", + curcpu, desc.dtbd_cpu); + if (desc.dtbd_cpu < 0 || desc.dtbd_cpu >= NCPU) return (EINVAL); @@ -258,6 +273,8 @@ ASSERT(cached == buf->dtb_xamot); + DTRACE_IOCTL_PRINTF("%s(%d): copyout the buffer snapshot\n",__func__,__LINE__); + /* * We have our snapshot; now copy it out. */ @@ -274,6 +291,8 @@ mutex_exit(&dtrace_lock); + DTRACE_IOCTL_PRINTF("%s(%d): copyout buffer desc: size %zd drops %lu errors %lu\n",__func__,__LINE__,desc.dtbd_size,(u_long) desc.dtbd_drops,(u_long) desc.dtbd_errors); + /* * Finally, copy out the buffer description. */ @@ -284,6 +303,9 @@ } case DTRACEIOC_CONF: { dtrace_conf_t conf; + + DTRACE_IOCTL_PRINTF("%s(%d): DTRACEIOC_CONF\n",__func__,__LINE__); + bzero(&conf, sizeof (conf)); conf.dtc_difversion = DIF_VERSION; conf.dtc_difintregs = DIF_DIR_NREGS; @@ -300,6 +322,8 @@ int rval; uint64_t len; + DTRACE_IOCTL_PRINTF("%s(%d): DTRACEIOC_DOFGET\n",__func__,__LINE__); + if (copyin((void *)dof, &hdr, sizeof (hdr)) != 0) return (EFAULT); @@ -321,6 +345,8 @@ int rval; dtrace_enable_io_t *p = (dtrace_enable_io_t *) addr; + DTRACE_IOCTL_PRINTF("%s(%d): DTRACEIOC_ENABLE\n",__func__,__LINE__); + /* * If a NULL argument has been passed, we take this as our * cue to reevaluate our enablings. @@ -386,6 +412,8 @@ uintptr_t dest; int nrecs; + DTRACE_IOCTL_PRINTF("%s(%d): DTRACEIOC_EPROBE\n",__func__,__LINE__); + if (copyin((void *)*pepdesc, &epdesc, sizeof (epdesc)) != 0) return (EFAULT); @@ -456,6 +484,8 @@ char *str; int len; + DTRACE_IOCTL_PRINTF("%s(%d): DTRACEIOC_FORMAT\n",__func__,__LINE__); + mutex_enter(&dtrace_lock); if (fmt->dtfd_format == 0 || @@ -492,6 +522,8 @@ int rval; processorid_t *cpuid = (processorid_t *) addr; + DTRACE_IOCTL_PRINTF("%s(%d): DTRACEIOC_GO\n",__func__,__LINE__); + rval = dtrace_state_go(state, cpuid); return (rval); @@ -501,6 +533,8 @@ dtrace_probe_t *probe; dtrace_provider_t *prov; + DTRACE_IOCTL_PRINTF("%s(%d): DTRACEIOC_PROBEARG\n",__func__,__LINE__); + if (desc->dtargd_id == DTRACE_IDNONE) return (EINVAL); @@ -560,6 +594,10 @@ uid_t uid = 0; zoneid_t zoneid = 0; + DTRACE_IOCTL_PRINTF("%s(%d): %s\n",__func__,__LINE__, + cmd == DTRACEIOC_PROBEMATCH ? + "DTRACEIOC_PROBEMATCH":"DTRACEIOC_PROBES"); + p_desc->dtpd_provider[DTRACE_PROVNAMELEN - 1] = '\0'; p_desc->dtpd_mod[DTRACE_MODNAMELEN - 1] = '\0'; p_desc->dtpd_func[DTRACE_FUNCNAMELEN - 1] = '\0'; @@ -620,6 +658,8 @@ dtrace_providerdesc_t *pvd = (dtrace_providerdesc_t *) addr; dtrace_provider_t *pvp; + DTRACE_IOCTL_PRINTF("%s(%d): DTRACEIOC_PROVIDER\n",__func__,__LINE__); + pvd->dtvd_name[DTRACE_PROVNAMELEN - 1] = '\0'; mutex_enter(&dtrace_provider_lock); @@ -644,6 +684,8 @@ dtrace_probedesc_t *create = &desc->dtrpd_create; int err; + DTRACE_IOCTL_PRINTF("%s(%d): DTRACEIOC_REPLICATE\n",__func__,__LINE__); + match->dtpd_provider[DTRACE_PROVNAMELEN - 1] = '\0'; match->dtpd_mod[DTRACE_MODNAMELEN - 1] = '\0'; match->dtpd_func[DTRACE_FUNCNAMELEN - 1] = '\0'; @@ -666,6 +708,8 @@ int i, j; uint64_t nerrs; + DTRACE_IOCTL_PRINTF("%s(%d): DTRACEIOC_STATUS\n",__func__,__LINE__); + /* * See the comment in dtrace_state_deadman() for the reason * for setting dts_laststatus to INT64_MAX before setting @@ -732,6 +776,8 @@ int rval; processorid_t *cpuid = (processorid_t *) addr; + DTRACE_IOCTL_PRINTF("%s(%d): DTRACEIOC_STOP\n",__func__,__LINE__); + mutex_enter(&dtrace_lock); rval = dtrace_state_stop(state, cpuid); mutex_exit(&dtrace_lock);
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