2N/A/*
2N/A * CDDL HEADER START
2N/A *
2N/A * The contents of this file are subject to the terms of the
2N/A * Common Development and Distribution License (the "License").
2N/A * You may not use this file except in compliance with the License.
2N/A *
2N/A * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
2N/A * or http://www.opensolaris.org/os/licensing.
2N/A * See the License for the specific language governing permissions
2N/A * and limitations under the License.
2N/A *
2N/A * When distributing Covered Code, include this CDDL HEADER in each
2N/A * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
2N/A * If applicable, add the following below this CDDL HEADER, with the
2N/A * fields enclosed by brackets "[]" replaced with your own identifying
2N/A * information: Portions Copyright [yyyy] [name of copyright owner]
2N/A *
2N/A * CDDL HEADER END
2N/A */
2N/A/*
2N/A * Copyright 2007 Sun Microsystems, Inc. All rights reserved.
2N/A * Use is subject to license terms.
2N/A */
2N/A
2N/A#pragma ident "%Z%%M% %I% %E% SMI"
2N/A
2N/A#include <stddef.h>
2N/A#include <stdlib.h>
2N/A#include <strings.h>
2N/A#include <errno.h>
2N/A#include <unistd.h>
2N/A#include <assert.h>
2N/A#include <alloca.h>
2N/A
2N/A#include <dt_impl.h>
2N/A#include <dt_program.h>
2N/A
2N/Astatic const char _dt_errprog[] =
2N/A"dtrace:::ERROR"
2N/A"{"
2N/A" trace(arg1);"
2N/A" trace(arg2);"
2N/A" trace(arg3);"
2N/A" trace(arg4);"
2N/A" trace(arg5);"
2N/A"}";
2N/A
2N/Aint
2N/Adtrace_handle_err(dtrace_hdl_t *dtp, dtrace_handle_err_f *hdlr, void *arg)
2N/A{
2N/A dtrace_prog_t *pgp = NULL;
2N/A dt_stmt_t *stp;
2N/A dtrace_ecbdesc_t *edp;
2N/A
2N/A /*
2N/A * We don't currently support multiple error handlers.
2N/A */
2N/A if (dtp->dt_errhdlr != NULL)
2N/A return (dt_set_errno(dtp, EALREADY));
2N/A
2N/A /*
2N/A * If the DTRACEOPT_GRABANON is enabled, the anonymous enabling will
2N/A * already have a dtrace:::ERROR probe enabled; save 'hdlr' and 'arg'
2N/A * but do not bother compiling and enabling _dt_errprog.
2N/A */
2N/A if (dtp->dt_options[DTRACEOPT_GRABANON] != DTRACEOPT_UNSET)
2N/A goto out;
2N/A
2N/A if ((pgp = dtrace_program_strcompile(dtp, _dt_errprog,
2N/A DTRACE_PROBESPEC_NAME, DTRACE_C_ZDEFS, 0, NULL)) == NULL)
2N/A return (dt_set_errno(dtp, dtrace_errno(dtp)));
2N/A
2N/A stp = dt_list_next(&pgp->dp_stmts);
2N/A assert(stp != NULL);
2N/A
2N/A edp = stp->ds_desc->dtsd_ecbdesc;
2N/A assert(edp != NULL);
2N/A edp->dted_uarg = DT_ECB_ERROR;
2N/A
2N/Aout:
2N/A dtp->dt_errhdlr = hdlr;
2N/A dtp->dt_errarg = arg;
2N/A dtp->dt_errprog = pgp;
2N/A
2N/A return (0);
2N/A}
2N/A
2N/Aint
2N/Adtrace_handle_drop(dtrace_hdl_t *dtp, dtrace_handle_drop_f *hdlr, void *arg)
2N/A{
2N/A if (dtp->dt_drophdlr != NULL)
2N/A return (dt_set_errno(dtp, EALREADY));
2N/A
2N/A dtp->dt_drophdlr = hdlr;
2N/A dtp->dt_droparg = arg;
2N/A
2N/A return (0);
2N/A}
2N/A
2N/Aint
2N/Adtrace_handle_proc(dtrace_hdl_t *dtp, dtrace_handle_proc_f *hdlr, void *arg)
2N/A{
2N/A if (dtp->dt_prochdlr != NULL)
2N/A return (dt_set_errno(dtp, EALREADY));
2N/A
2N/A dtp->dt_prochdlr = hdlr;
2N/A dtp->dt_procarg = arg;
2N/A
2N/A return (0);
2N/A}
2N/A
2N/Aint
2N/Adtrace_handle_buffered(dtrace_hdl_t *dtp, dtrace_handle_buffered_f *hdlr,
2N/A void *arg)
2N/A{
2N/A if (dtp->dt_bufhdlr != NULL)
2N/A return (dt_set_errno(dtp, EALREADY));
2N/A
2N/A if (hdlr == NULL)
2N/A return (dt_set_errno(dtp, EINVAL));
2N/A
2N/A dtp->dt_bufhdlr = hdlr;
2N/A dtp->dt_bufarg = arg;
2N/A
2N/A return (0);
2N/A}
2N/A
2N/Aint
2N/Adtrace_handle_setopt(dtrace_hdl_t *dtp, dtrace_handle_setopt_f *hdlr,
2N/A void *arg)
2N/A{
2N/A if (hdlr == NULL)
2N/A return (dt_set_errno(dtp, EINVAL));
2N/A
2N/A dtp->dt_setopthdlr = hdlr;
2N/A dtp->dt_setoptarg = arg;
2N/A
2N/A return (0);
2N/A}
2N/A
2N/A#define DT_REC(type, ndx) *((type *)((uintptr_t)data->dtpda_data + \
2N/A epd->dtepd_rec[(ndx)].dtrd_offset))
2N/A
2N/Astatic int
2N/Adt_handle_err(dtrace_hdl_t *dtp, dtrace_probedata_t *data)
2N/A{
2N/A dtrace_eprobedesc_t *epd = data->dtpda_edesc, *errepd;
2N/A dtrace_probedesc_t *pd = data->dtpda_pdesc, *errpd;
2N/A dtrace_errdata_t err;
2N/A dtrace_epid_t epid;
2N/A
2N/A char where[30];
2N/A char details[30];
2N/A char offinfo[30];
2N/A const int slop = 80;
2N/A const char *faultstr;
2N/A char *str;
2N/A int len;
2N/A
2N/A assert(epd->dtepd_uarg == DT_ECB_ERROR);
2N/A
2N/A if (epd->dtepd_nrecs != 5 || strcmp(pd->dtpd_provider, "dtrace") != 0 ||
2N/A strcmp(pd->dtpd_name, "ERROR") != 0)
2N/A return (dt_set_errno(dtp, EDT_BADERROR));
2N/A
2N/A /*
2N/A * This is an error. We have the following items here: EPID,
2N/A * faulting action, DIF offset, fault code and faulting address.
2N/A */
2N/A epid = (uint32_t)DT_REC(uint64_t, 0);
2N/A
2N/A if (dt_epid_lookup(dtp, epid, &errepd, &errpd) != 0)
2N/A return (dt_set_errno(dtp, EDT_BADERROR));
2N/A
2N/A err.dteda_edesc = errepd;
2N/A err.dteda_pdesc = errpd;
2N/A err.dteda_cpu = data->dtpda_cpu;
2N/A err.dteda_action = (int)DT_REC(uint64_t, 1);
2N/A err.dteda_offset = (int)DT_REC(uint64_t, 2);
2N/A err.dteda_fault = (int)DT_REC(uint64_t, 3);
2N/A err.dteda_addr = DT_REC(uint64_t, 4);
2N/A
2N/A faultstr = dtrace_faultstr(dtp, err.dteda_fault);
2N/A len = sizeof (where) + sizeof (offinfo) + strlen(faultstr) +
2N/A strlen(errpd->dtpd_provider) + strlen(errpd->dtpd_mod) +
2N/A strlen(errpd->dtpd_name) + strlen(errpd->dtpd_func) +
2N/A slop;
2N/A
2N/A str = (char *)alloca(len);
2N/A
2N/A if (err.dteda_action == 0) {
2N/A (void) sprintf(where, "predicate");
2N/A } else {
2N/A (void) sprintf(where, "action #%d", err.dteda_action);
2N/A }
2N/A
2N/A if (err.dteda_offset != -1) {
2N/A (void) sprintf(offinfo, " at DIF offset %d", err.dteda_offset);
2N/A } else {
2N/A offinfo[0] = 0;
2N/A }
2N/A
2N/A switch (err.dteda_fault) {
2N/A case DTRACEFLT_BADADDR:
2N/A case DTRACEFLT_BADALIGN:
2N/A case DTRACEFLT_BADSTACK:
2N/A (void) sprintf(details, " (0x%llx)",
2N/A (u_longlong_t)err.dteda_addr);
2N/A break;
2N/A
2N/A default:
2N/A details[0] = 0;
2N/A }
2N/A
2N/A (void) snprintf(str, len, "error on enabled probe ID %u "
2N/A "(ID %u: %s:%s:%s:%s): %s%s in %s%s\n",
2N/A epid, errpd->dtpd_id, errpd->dtpd_provider,
2N/A errpd->dtpd_mod, errpd->dtpd_func,
2N/A errpd->dtpd_name, dtrace_faultstr(dtp, err.dteda_fault),
2N/A details, where, offinfo);
2N/A
2N/A err.dteda_msg = str;
2N/A
2N/A if (dtp->dt_errhdlr == NULL)
2N/A return (dt_set_errno(dtp, EDT_ERRABORT));
2N/A
2N/A if ((*dtp->dt_errhdlr)(&err, dtp->dt_errarg) == DTRACE_HANDLE_ABORT)
2N/A return (dt_set_errno(dtp, EDT_ERRABORT));
2N/A
2N/A return (0);
2N/A}
2N/A
2N/Aint
2N/Adt_handle_liberr(dtrace_hdl_t *dtp, const dtrace_probedata_t *data,
2N/A const char *faultstr)
2N/A{
2N/A dtrace_probedesc_t *errpd = data->dtpda_pdesc;
2N/A dtrace_errdata_t err;
2N/A const int slop = 80;
2N/A char *str;
2N/A int len;
2N/A
2N/A err.dteda_edesc = data->dtpda_edesc;
2N/A err.dteda_pdesc = errpd;
2N/A err.dteda_cpu = data->dtpda_cpu;
2N/A err.dteda_action = -1;
2N/A err.dteda_offset = -1;
2N/A err.dteda_fault = DTRACEFLT_LIBRARY;
2N/A err.dteda_addr = NULL;
2N/A
2N/A len = strlen(faultstr) +
2N/A strlen(errpd->dtpd_provider) + strlen(errpd->dtpd_mod) +
2N/A strlen(errpd->dtpd_name) + strlen(errpd->dtpd_func) +
2N/A slop;
2N/A
2N/A str = alloca(len);
2N/A
2N/A (void) snprintf(str, len, "error on enabled probe ID %u "
2N/A "(ID %u: %s:%s:%s:%s): %s\n",
2N/A data->dtpda_edesc->dtepd_epid,
2N/A errpd->dtpd_id, errpd->dtpd_provider,
2N/A errpd->dtpd_mod, errpd->dtpd_func,
2N/A errpd->dtpd_name, faultstr);
2N/A
2N/A err.dteda_msg = str;
2N/A
2N/A if (dtp->dt_errhdlr == NULL)
2N/A return (dt_set_errno(dtp, EDT_ERRABORT));
2N/A
2N/A if ((*dtp->dt_errhdlr)(&err, dtp->dt_errarg) == DTRACE_HANDLE_ABORT)
2N/A return (dt_set_errno(dtp, EDT_ERRABORT));
2N/A
2N/A return (0);
2N/A}
2N/A
2N/A#define DROPTAG(x) x, #x
2N/A
2N/Astatic const struct {
2N/A dtrace_dropkind_t dtdrg_kind;
2N/A char *dtdrg_tag;
2N/A} _dt_droptags[] = {
2N/A { DROPTAG(DTRACEDROP_PRINCIPAL) },
2N/A { DROPTAG(DTRACEDROP_AGGREGATION) },
2N/A { DROPTAG(DTRACEDROP_DYNAMIC) },
2N/A { DROPTAG(DTRACEDROP_DYNRINSE) },
2N/A { DROPTAG(DTRACEDROP_DYNDIRTY) },
2N/A { DROPTAG(DTRACEDROP_SPEC) },
2N/A { DROPTAG(DTRACEDROP_SPECBUSY) },
2N/A { DROPTAG(DTRACEDROP_SPECUNAVAIL) },
2N/A { DROPTAG(DTRACEDROP_DBLERROR) },
2N/A { DROPTAG(DTRACEDROP_STKSTROVERFLOW) },
2N/A { 0, NULL }
2N/A};
2N/A
2N/Astatic const char *
2N/Adt_droptag(dtrace_dropkind_t kind)
2N/A{
2N/A int i;
2N/A
2N/A for (i = 0; _dt_droptags[i].dtdrg_tag != NULL; i++) {
2N/A if (_dt_droptags[i].dtdrg_kind == kind)
2N/A return (_dt_droptags[i].dtdrg_tag);
2N/A }
2N/A
2N/A return ("DTRACEDROP_UNKNOWN");
2N/A}
2N/A
2N/Aint
2N/Adt_handle_cpudrop(dtrace_hdl_t *dtp, processorid_t cpu,
2N/A dtrace_dropkind_t what, uint64_t howmany)
2N/A{
2N/A dtrace_dropdata_t drop;
2N/A char str[80], *s;
2N/A int size;
2N/A
2N/A assert(what == DTRACEDROP_PRINCIPAL || what == DTRACEDROP_AGGREGATION);
2N/A
2N/A bzero(&drop, sizeof (drop));
2N/A drop.dtdda_handle = dtp;
2N/A drop.dtdda_cpu = cpu;
2N/A drop.dtdda_kind = what;
2N/A drop.dtdda_drops = howmany;
2N/A drop.dtdda_msg = str;
2N/A
2N/A if (dtp->dt_droptags) {
2N/A (void) snprintf(str, sizeof (str), "[%s] ", dt_droptag(what));
2N/A s = &str[strlen(str)];
2N/A size = sizeof (str) - (s - str);
2N/A } else {
2N/A s = str;
2N/A size = sizeof (str);
2N/A }
2N/A
2N/A (void) snprintf(s, size, "%llu %sdrop%s on CPU %d\n",
2N/A howmany, what == DTRACEDROP_PRINCIPAL ? "" : "aggregation ",
2N/A howmany > 1 ? "s" : "", cpu);
2N/A
2N/A if (dtp->dt_drophdlr == NULL)
2N/A return (dt_set_errno(dtp, EDT_DROPABORT));
2N/A
2N/A if ((*dtp->dt_drophdlr)(&drop, dtp->dt_droparg) == DTRACE_HANDLE_ABORT)
2N/A return (dt_set_errno(dtp, EDT_DROPABORT));
2N/A
2N/A return (0);
2N/A}
2N/A
2N/Astatic const struct {
2N/A dtrace_dropkind_t dtdrt_kind;
2N/A uintptr_t dtdrt_offset;
2N/A const char *dtdrt_str;
2N/A const char *dtdrt_msg;
2N/A} _dt_droptab[] = {
2N/A { DTRACEDROP_DYNAMIC,
2N/A offsetof(dtrace_status_t, dtst_dyndrops),
2N/A "dynamic variable drop" },
2N/A
2N/A { DTRACEDROP_DYNRINSE,
2N/A offsetof(dtrace_status_t, dtst_dyndrops_rinsing),
2N/A "dynamic variable drop", " with non-empty rinsing list" },
2N/A
2N/A { DTRACEDROP_DYNDIRTY,
2N/A offsetof(dtrace_status_t, dtst_dyndrops_dirty),
2N/A "dynamic variable drop", " with non-empty dirty list" },
2N/A
2N/A { DTRACEDROP_SPEC,
2N/A offsetof(dtrace_status_t, dtst_specdrops),
2N/A "speculative drop" },
2N/A
2N/A { DTRACEDROP_SPECBUSY,
2N/A offsetof(dtrace_status_t, dtst_specdrops_busy),
2N/A "failed speculation", " (available buffer(s) still busy)" },
2N/A
2N/A { DTRACEDROP_SPECUNAVAIL,
2N/A offsetof(dtrace_status_t, dtst_specdrops_unavail),
2N/A "failed speculation", " (no speculative buffer available)" },
2N/A
2N/A { DTRACEDROP_STKSTROVERFLOW,
2N/A offsetof(dtrace_status_t, dtst_stkstroverflows),
2N/A "jstack()/ustack() string table overflow" },
2N/A
2N/A { DTRACEDROP_DBLERROR,
2N/A offsetof(dtrace_status_t, dtst_dblerrors),
2N/A "error", " in ERROR probe enabling" },
2N/A
2N/A { 0, 0, NULL }
2N/A};
2N/A
2N/Aint
2N/Adt_handle_status(dtrace_hdl_t *dtp, dtrace_status_t *old, dtrace_status_t *new)
2N/A{
2N/A dtrace_dropdata_t drop;
2N/A char str[80], *s;
2N/A uintptr_t base = (uintptr_t)new, obase = (uintptr_t)old;
2N/A int i, size;
2N/A
2N/A bzero(&drop, sizeof (drop));
2N/A drop.dtdda_handle = dtp;
2N/A drop.dtdda_cpu = DTRACE_CPUALL;
2N/A drop.dtdda_msg = str;
2N/A
2N/A /*
2N/A * First, check to see if we've been killed -- in which case we abort.
2N/A */
2N/A if (new->dtst_killed && !old->dtst_killed)
2N/A return (dt_set_errno(dtp, EDT_BRICKED));
2N/A
2N/A for (i = 0; _dt_droptab[i].dtdrt_str != NULL; i++) {
2N/A uintptr_t naddr = base + _dt_droptab[i].dtdrt_offset;
2N/A uintptr_t oaddr = obase + _dt_droptab[i].dtdrt_offset;
2N/A
2N/A uint64_t nval = *((uint64_t *)naddr);
2N/A uint64_t oval = *((uint64_t *)oaddr);
2N/A
2N/A if (nval == oval)
2N/A continue;
2N/A
2N/A if (dtp->dt_droptags) {
2N/A (void) snprintf(str, sizeof (str), "[%s] ",
2N/A dt_droptag(_dt_droptab[i].dtdrt_kind));
2N/A s = &str[strlen(str)];
2N/A size = sizeof (str) - (s - str);
2N/A } else {
2N/A s = str;
2N/A size = sizeof (str);
2N/A }
2N/A
2N/A (void) snprintf(s, size, "%llu %s%s%s\n", nval - oval,
2N/A _dt_droptab[i].dtdrt_str, (nval - oval > 1) ? "s" : "",
2N/A _dt_droptab[i].dtdrt_msg != NULL ?
2N/A _dt_droptab[i].dtdrt_msg : "");
2N/A
2N/A drop.dtdda_kind = _dt_droptab[i].dtdrt_kind;
2N/A drop.dtdda_total = nval;
2N/A drop.dtdda_drops = nval - oval;
2N/A
2N/A if (dtp->dt_drophdlr == NULL)
2N/A return (dt_set_errno(dtp, EDT_DROPABORT));
2N/A
2N/A if ((*dtp->dt_drophdlr)(&drop,
2N/A dtp->dt_droparg) == DTRACE_HANDLE_ABORT)
2N/A return (dt_set_errno(dtp, EDT_DROPABORT));
2N/A }
2N/A
2N/A return (0);
2N/A}
2N/A
2N/Aint
2N/Adt_handle_setopt(dtrace_hdl_t *dtp, dtrace_setoptdata_t *data)
2N/A{
2N/A void *arg = dtp->dt_setoptarg;
2N/A
2N/A if (dtp->dt_setopthdlr == NULL)
2N/A return (0);
2N/A
2N/A if ((*dtp->dt_setopthdlr)(data, arg) == DTRACE_HANDLE_ABORT)
2N/A return (dt_set_errno(dtp, EDT_DIRABORT));
2N/A
2N/A return (0);
2N/A}
2N/A
2N/Aint
2N/Adt_handle(dtrace_hdl_t *dtp, dtrace_probedata_t *data)
2N/A{
2N/A dtrace_eprobedesc_t *epd = data->dtpda_edesc;
2N/A int rval;
2N/A
2N/A switch (epd->dtepd_uarg) {
2N/A case DT_ECB_ERROR:
2N/A rval = dt_handle_err(dtp, data);
2N/A break;
2N/A
2N/A default:
2N/A return (DTRACE_CONSUME_THIS);
2N/A }
2N/A
2N/A if (rval == 0)
2N/A return (DTRACE_CONSUME_NEXT);
2N/A
2N/A return (DTRACE_CONSUME_ERROR);
2N/A}