Loading...
--- xnu/xnu-12377.121.6/bsd/dev/dtrace/lockstat.c
+++ /dev/null
@@ -1,284 +0,0 @@
-/*
- * CDDL HEADER START
- *
- * The contents of this file are subject to the terms of the
- * Common Development and Distribution License (the "License").
- * You may not use this file except in compliance with the License.
- *
- * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
- * or http://www.opensolaris.org/os/licensing.
- * See the License for the specific language governing permissions
- * and limitations under the License.
- *
- * When distributing Covered Code, include this CDDL HEADER in each
- * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
- * If applicable, add the following below this CDDL HEADER, with the
- * fields enclosed by brackets "[]" replaced with your own identifying
- * information: Portions Copyright [yyyy] [name of copyright owner]
- *
- * CDDL HEADER END
- */
-/*
- * Copyright 2009 Sun Microsystems, Inc. All rights reserved.
- * Use is subject to license terms.
- */
-
-#include <sys/param.h>
-#include <sys/systm.h>
-#include <sys/errno.h>
-#include <sys/stat.h>
-#include <sys/ioctl.h>
-#include <sys/conf.h>
-#include <sys/fcntl.h>
-#include <miscfs/devfs/devfs.h>
-
-#include <sys/dtrace.h>
-#include <sys/dtrace_impl.h>
-
-#include <sys/dtrace_glue.h>
-
-#include <sys/lockstat.h>
-
-#include <kern/lock_stat.h>
-
-#define PROBE_ARGS0(a, b, c, d, e) "\000"
-#define PROBE_ARGS1(a, b, c, d, e) a "\000"
-#define PROBE_ARGS2(a, b, c, d, e) a "\000" b "\000"
-#define PROBE_ARGS3(a, b, c, d, e) a "\000" b "\000" c "\000"
-#define PROBE_ARGS4(a, b, c, d, e) a "\000" b "\000" c "\000" d "\000"
-#define PROBE_ARGS5(a, b, c, d, e) a "\000" b "\000" c "\000" d "\000" e "\000"
-#define PROBE_ARGS_(a, b, c, d, e, n, ...) PROBE_ARGS##n(a, b, c, d, e)
-#define PROBE_ARGS(...) PROBE_ARGS_(__VA_ARGS__, 5, 4, 3, 2, 1, 0)
-
-#define LOCKSTAT_PROBE(func, name, probe, ...) \
- {func, name, probe, DTRACE_IDNONE, PROBE_ARGS(__VA_ARGS__)}
-
-#if defined(__x86_64__)
-#define LOCKSTAT_AFRAMES 1
-#elif defined(__arm64__)
-#define LOCKSTAT_AFRAMES 2
-#else
-#error "architecture not supported"
-#endif
-
-typedef struct lockstat_probe {
- const char *lsp_func;
- const char *lsp_name;
- int lsp_probe;
- dtrace_id_t lsp_id;
- const char *lsp_args;
-} lockstat_probe_t;
-
-lockstat_probe_t lockstat_probes[] =
-{
- // Mutex probes
- // .. acquire/release
- LOCKSTAT_PROBE(LS_LCK_MTX_LOCK, LSA_ACQUIRE, LS_LCK_MTX_LOCK_ACQUIRE, "lck_mtx_t", "lck_grp_t"),
- LOCKSTAT_PROBE(LS_LCK_MTX_LOCK_SPIN, LSA_ACQUIRE, LS_LCK_MTX_LOCK_SPIN_ACQUIRE, "lck_mtx_t", "lck_grp_t"),
- LOCKSTAT_PROBE(LS_LCK_MTX_TRY_LOCK, LSA_ACQUIRE, LS_LCK_MTX_TRY_LOCK_ACQUIRE, "lck_mtx_t", "lck_grp_t"),
- LOCKSTAT_PROBE(LS_LCK_MTX_TRY_LOCK_SPIN, LSA_ACQUIRE, LS_LCK_MTX_TRY_LOCK_SPIN_ACQUIRE, "lck_mtx_t", "lck_grp_t"),
- LOCKSTAT_PROBE(LS_LCK_MTX_UNLOCK, LSA_RELEASE, LS_LCK_MTX_UNLOCK_RELEASE, "lck_mtx_t", "lck_grp_t"),
-
- // .. blocking and spinning
- LOCKSTAT_PROBE(LS_LCK_MTX_LOCK, LSA_BLOCK, LS_LCK_MTX_LOCK_BLOCK, "lck_mtx_t", "uint64_t", "lck_grp_t"),
- LOCKSTAT_PROBE(LS_LCK_MTX_LOCK, LSA_SPIN, LS_LCK_MTX_LOCK_ADAPTIVE_SPIN, "lck_mtx_t", "uint64_t", "lck_grp_t"),
- LOCKSTAT_PROBE(LS_LCK_MTX_LOCK_SPIN, LSA_SPIN, LS_LCK_MTX_LOCK_SPIN_SPIN, "lck_mtx_t", "uint64_t", "lck_grp_t"),
-
- // RW lock probes
- // TODO: This should not be a uint64_t !
- LOCKSTAT_PROBE(LS_LCK_RW_LOCK_SHARED, LSR_ACQUIRE, LS_LCK_RW_LOCK_SHARED_ACQUIRE, "lck_rw_t", "uint64_t"),
- LOCKSTAT_PROBE(LS_LCK_RW_LOCK_SHARED, LSR_BLOCK, LS_LCK_RW_LOCK_SHARED_BLOCK, "lck_rw_t", "uint64_t", "_Bool", "_Bool", "int"),
- LOCKSTAT_PROBE(LS_LCK_RW_LOCK_SHARED, LSR_SPIN, LS_LCK_RW_LOCK_SHARED_SPIN, "lck_rw_t", "uint64_t", "_Bool", "_Bool", "int"),
- LOCKSTAT_PROBE(LS_LCK_RW_LOCK_EXCL, LSR_ACQUIRE, LS_LCK_RW_LOCK_EXCL_ACQUIRE, "lck_rw_t", "uint64_t"),
- // TODO: This should NOT be a uint64_t
- LOCKSTAT_PROBE(LS_LCK_RW_LOCK_EXCL, LSR_BLOCK, LS_LCK_RW_LOCK_EXCL_BLOCK, "lck_rw_t", "uint64_t", "_Bool", "_Bool", "int"),
- LOCKSTAT_PROBE(LS_LCK_RW_LOCK_EXCL, LSR_SPIN, LS_LCK_RW_LOCK_EXCL_SPIN, "lck_rw_t", "uint64_t", "int"),
- LOCKSTAT_PROBE(LS_LCK_RW_DONE, LSR_RELEASE, LS_LCK_RW_DONE_RELEASE, "lck_rw_t", "_Bool"),
- // TODO : This should NOT be a uint64_t
- LOCKSTAT_PROBE(LS_LCK_RW_TRY_LOCK_SHARED, LSR_ACQUIRE, LS_LCK_RW_TRY_LOCK_SHARED_ACQUIRE, "lck_rw_t", "uint64_t"),
- LOCKSTAT_PROBE(LS_LCK_RW_TRY_LOCK_EXCL, LSR_ACQUIRE, LS_LCK_RW_TRY_LOCK_EXCL_ACQUIRE, "lck_rw_t", "uint64_t"),
- LOCKSTAT_PROBE(LS_LCK_RW_LOCK_SHARED_TO_EXCL, LSR_UPGRADE, LS_LCK_RW_LOCK_SHARED_TO_EXCL_UPGRADE, "lck_rw_t", "_Bool"),
- LOCKSTAT_PROBE(LS_LCK_RW_LOCK_SHARED_TO_EXCL, LSR_SPIN, LS_LCK_RW_LOCK_SHARED_TO_EXCL_SPIN, "lck_rw_t", "uint64_t"),
- LOCKSTAT_PROBE(LS_LCK_RW_LOCK_SHARED_TO_EXCL, LSR_BLOCK, LS_LCK_RW_LOCK_SHARED_TO_EXCL_BLOCK, "lck_rw_t", "uint64_t", "_Bool", "_Bool", "int"),
-
- // Spin lock probes
- //TODO : Separate the probes for the hw_bit from the probe for the normal hw locks
- LOCKSTAT_PROBE(LS_LCK_SPIN_LOCK, LSS_ACQUIRE, LS_LCK_SPIN_LOCK_ACQUIRE, "hw_lock_t"),
- LOCKSTAT_PROBE(LS_LCK_SPIN_LOCK, LSS_SPIN, LS_LCK_SPIN_LOCK_SPIN, "hw_lock_t", "uint64_t", "uint64_t"),
- LOCKSTAT_PROBE(LS_LCK_SPIN_UNLOCK, LSS_RELEASE, LS_LCK_SPIN_UNLOCK_RELEASE, "hw_lock_t"),
- LOCKSTAT_PROBE(LS_LCK_RW_LOCK_EXCL_TO_SHARED, LSR_DOWNGRADE, LS_LCK_RW_LOCK_EXCL_TO_SHARED_DOWNGRADE, "lck_rw_t"),
- // Ticket lock probes
- LOCKSTAT_PROBE(LS_LCK_TICKET_LOCK, LST_ACQUIRE, LS_LCK_TICKET_LOCK_ACQUIRE, "lck_ticket_t"),
- LOCKSTAT_PROBE(LS_LCK_TICKET_LOCK, LST_RELEASE, LS_LCK_TICKET_LOCK_RELEASE, "lck_ticket_t"),
- LOCKSTAT_PROBE(LS_LCK_TICKET_LOCK, LST_SPIN, LS_LCK_TICKET_LOCK_SPIN, "lck_ticket_t"),
- {
- NULL, NULL, 0, 0, NULL
- }
-};
-
-dtrace_id_t lockstat_probemap[LS_NPROBES];
-
-static dtrace_provider_id_t lockstat_id;
-
-/*ARGSUSED*/
-static int
-lockstat_enable(void *arg, dtrace_id_t id, void *parg)
-{
-#pragma unused(arg) /* __APPLE__ */
-
- lockstat_probe_t *probe = parg;
-
- ASSERT(!lockstat_probemap[probe->lsp_probe]);
-
- lockstat_probemap[probe->lsp_probe] = id;
- lck_grp_enable_feature(LCK_DEBUG_LOCKSTAT);
-
- return 0;
-}
-
-/*ARGSUSED*/
-static void
-lockstat_disable(void *arg, dtrace_id_t id, void *parg)
-{
-#pragma unused(arg, id) /* __APPLE__ */
-
- lockstat_probe_t *probe = parg;
-
- ASSERT(lockstat_probemap[probe->lsp_probe]);
-
- lockstat_probemap[probe->lsp_probe] = 0;
- lck_grp_disable_feature(LCK_DEBUG_LOCKSTAT);
-}
-
-/*ARGSUSED*/
-static void
-lockstat_provide(void *arg, const dtrace_probedesc_t *desc)
-{
-#pragma unused(arg, desc) /* __APPLE__ */
-
- int i = 0;
-
- for (i = 0; lockstat_probes[i].lsp_func != NULL; i++) {
- lockstat_probe_t *probe = &lockstat_probes[i];
-
- if (dtrace_probe_lookup(lockstat_id, "mach_kernel",
- probe->lsp_func, probe->lsp_name) != 0) {
- continue;
- }
-
- ASSERT(!probe->lsp_id);
- probe->lsp_id = dtrace_probe_create(lockstat_id,
- "mach_kernel", probe->lsp_func, probe->lsp_name,
- LOCKSTAT_AFRAMES, probe);
- }
-}
-
-
-/*ARGSUSED*/
-static void
-lockstat_destroy(void *arg, dtrace_id_t id, void *parg)
-{
-#pragma unused(arg, id)
-
- lockstat_probe_t *probe = parg;
-
- ASSERT(!lockstat_probemap[probe->lsp_probe]);
- probe->lsp_id = 0;
-}
-
-static void
-lockstat_getargdesc(void *arg, dtrace_id_t id, void *parg, dtrace_argdesc_t *desc)
-{
-#pragma unused(arg, id)
- lockstat_probe_t *probe = parg;
- const char* argdesc = probe->lsp_args;
- int narg = 0;
-
- desc->dtargd_native[0] = '\0';
- desc->dtargd_xlate[0] = '\0';
-
- while (argdesc[0] != '\0') {
- if (narg == desc->dtargd_ndx) {
- strlcpy(desc->dtargd_native, argdesc, DTRACE_ARGTYPELEN);
- return;
- }
- argdesc += strlen(argdesc) + 1;
- narg++;
- }
-
- desc->dtargd_ndx = DTRACE_ARGNONE;
-}
-
-static dtrace_pattr_t lockstat_attr = {
- { DTRACE_STABILITY_EVOLVING, DTRACE_STABILITY_EVOLVING, DTRACE_CLASS_COMMON },
- { DTRACE_STABILITY_PRIVATE, DTRACE_STABILITY_PRIVATE, DTRACE_CLASS_UNKNOWN },
- { DTRACE_STABILITY_PRIVATE, DTRACE_STABILITY_PRIVATE, DTRACE_CLASS_UNKNOWN },
- { DTRACE_STABILITY_EVOLVING, DTRACE_STABILITY_EVOLVING, DTRACE_CLASS_COMMON },
- { DTRACE_STABILITY_EVOLVING, DTRACE_STABILITY_EVOLVING, DTRACE_CLASS_COMMON },
-};
-
-static dtrace_pops_t lockstat_pops = {
- .dtps_provide = lockstat_provide,
- .dtps_provide_module = NULL,
- .dtps_enable = lockstat_enable,
- .dtps_disable = lockstat_disable,
- .dtps_suspend = NULL,
- .dtps_resume = NULL,
- .dtps_getargdesc = lockstat_getargdesc,
- .dtps_getargval = NULL,
- .dtps_usermode = NULL,
- .dtps_destroy = lockstat_destroy
-};
-
-static int
-lockstat_attach(dev_info_t *devi)
-{
- if (ddi_create_minor_node(devi, "lockstat", S_IFCHR, 0,
- DDI_PSEUDO, 0) == DDI_FAILURE ||
- dtrace_register("lockstat", &lockstat_attr, DTRACE_PRIV_KERNEL,
- NULL, &lockstat_pops, NULL, &lockstat_id) != 0) {
- ddi_remove_minor_node(devi, NULL);
- return DDI_FAILURE;
- }
-
- return DDI_SUCCESS;
-}
-
-static int
-_lockstat_open(dev_t dev, int flags, int devtype, struct proc *p)
-{
-#pragma unused(dev,flags,devtype,p)
- return 0;
-}
-
-
-static const struct cdevsw lockstat_cdevsw =
-{
- .d_open = _lockstat_open,
- .d_close = eno_opcl,
- .d_read = eno_rdwrt,
- .d_write = eno_rdwrt,
- .d_ioctl = eno_ioctl,
- .d_stop = eno_stop,
- .d_reset = eno_reset,
- .d_select = eno_select,
- .d_mmap = eno_mmap,
- .d_strategy = eno_strat,
- .d_reserved_1 = eno_getc,
- .d_reserved_2 = eno_putc,
-};
-
-void lockstat_init( void );
-
-void
-lockstat_init( void )
-{
- int majdevno = cdevsw_add(-1, &lockstat_cdevsw);
-
- if (majdevno < 0) {
- printf("lockstat_init: failed to allocate a major number!\n");
- return;
- }
-
- lockstat_attach((dev_info_t*)(uintptr_t)majdevno);
-}