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-rw-r--r--db2/lock/lock_region.c726
1 files changed, 726 insertions, 0 deletions
diff --git a/db2/lock/lock_region.c b/db2/lock/lock_region.c
new file mode 100644
index 0000000000..b597560744
--- /dev/null
+++ b/db2/lock/lock_region.c
@@ -0,0 +1,726 @@
+/*-
+ * See the file LICENSE for redistribution information.
+ *
+ * Copyright (c) 1996, 1997, 1998
+ * Sleepycat Software. All rights reserved.
+ */
+
+#include "config.h"
+
+#ifndef lint
+static const char sccsid[] = "@(#)lock_region.c 10.15 (Sleepycat) 6/2/98";
+#endif /* not lint */
+
+#ifndef NO_SYSTEM_INCLUDES
+#include <sys/types.h>
+
+#include <ctype.h>
+#include <errno.h>
+#include <string.h>
+#endif
+
+#include "db_int.h"
+#include "shqueue.h"
+#include "db_shash.h"
+#include "lock.h"
+#include "common_ext.h"
+
+static u_int32_t __lock_count_locks __P((DB_LOCKREGION *));
+static u_int32_t __lock_count_objs __P((DB_LOCKREGION *));
+static void __lock_dump_locker __P((DB_LOCKTAB *, DB_LOCKOBJ *, FILE *));
+static void __lock_dump_object __P((DB_LOCKTAB *, DB_LOCKOBJ *, FILE *));
+static const char *__lock_dump_status __P((db_status_t));
+static void __lock_reset_region __P((DB_LOCKTAB *));
+static int __lock_tabinit __P((DB_ENV *, DB_LOCKREGION *));
+
+int
+lock_open(path, flags, mode, dbenv, ltp)
+ const char *path;
+ u_int32_t flags;
+ int mode;
+ DB_ENV *dbenv;
+ DB_LOCKTAB **ltp;
+{
+ DB_LOCKTAB *lt;
+ u_int32_t lock_modes, maxlocks, regflags;
+ int ret;
+
+ /* Validate arguments. */
+#ifdef HAVE_SPINLOCKS
+#define OKFLAGS (DB_CREATE | DB_THREAD)
+#else
+#define OKFLAGS (DB_CREATE)
+#endif
+ if ((ret = __db_fchk(dbenv, "lock_open", flags, OKFLAGS)) != 0)
+ return (ret);
+
+ /* Create the lock table structure. */
+ if ((lt = (DB_LOCKTAB *)__db_calloc(1, sizeof(DB_LOCKTAB))) == NULL) {
+ __db_err(dbenv, "%s", strerror(ENOMEM));
+ return (ENOMEM);
+ }
+ lt->dbenv = dbenv;
+
+ /* Grab the values that we need to compute the region size. */
+ lock_modes = DB_LOCK_RW_N;
+ maxlocks = DB_LOCK_DEFAULT_N;
+ regflags = REGION_SIZEDEF;
+ if (dbenv != NULL) {
+ if (dbenv->lk_modes != 0) {
+ lock_modes = dbenv->lk_modes;
+ regflags = 0;
+ }
+ if (dbenv->lk_max != 0) {
+ maxlocks = dbenv->lk_max;
+ regflags = 0;
+ }
+ }
+
+ /* Join/create the lock region. */
+ lt->reginfo.dbenv = dbenv;
+ lt->reginfo.appname = DB_APP_NONE;
+ if (path == NULL)
+ lt->reginfo.path = NULL;
+ else
+ if ((lt->reginfo.path = (char *)__db_strdup(path)) == NULL)
+ goto err;
+ lt->reginfo.file = DB_DEFAULT_LOCK_FILE;
+ lt->reginfo.mode = mode;
+ lt->reginfo.size =
+ LOCK_REGION_SIZE(lock_modes, maxlocks, __db_tablesize(maxlocks));
+ lt->reginfo.dbflags = flags;
+ lt->reginfo.addr = NULL;
+ lt->reginfo.fd = -1;
+ lt->reginfo.flags = regflags;
+
+ if ((ret = __db_rattach(&lt->reginfo)) != 0)
+ goto err;
+
+ /* Now set up the pointer to the region. */
+ lt->region = lt->reginfo.addr;
+
+ /* Initialize the region if we created it. */
+ if (F_ISSET(&lt->reginfo, REGION_CREATED)) {
+ lt->region->maxlocks = maxlocks;
+ lt->region->nmodes = lock_modes;
+ if ((ret = __lock_tabinit(dbenv, lt->region)) != 0)
+ goto err;
+ } else {
+ /* Check for an unexpected region. */
+ if (lt->region->magic != DB_LOCKMAGIC) {
+ __db_err(dbenv,
+ "lock_open: %s: bad magic number", path);
+ ret = EINVAL;
+ goto err;
+ }
+ }
+
+ /* Check for automatic deadlock detection. */
+ if (dbenv != NULL && dbenv->lk_detect != DB_LOCK_NORUN) {
+ if (lt->region->detect != DB_LOCK_NORUN &&
+ dbenv->lk_detect != DB_LOCK_DEFAULT &&
+ lt->region->detect != dbenv->lk_detect) {
+ __db_err(dbenv,
+ "lock_open: incompatible deadlock detector mode");
+ ret = EINVAL;
+ goto err;
+ }
+ if (lt->region->detect == DB_LOCK_NORUN)
+ lt->region->detect = dbenv->lk_detect;
+ }
+
+ /* Set up remaining pointers into region. */
+ lt->conflicts = (u_int8_t *)lt->region + sizeof(DB_LOCKREGION);
+ lt->hashtab =
+ (DB_HASHTAB *)((u_int8_t *)lt->region + lt->region->hash_off);
+ lt->mem = (void *)((u_int8_t *)lt->region + lt->region->mem_off);
+
+ UNLOCK_LOCKREGION(lt);
+ *ltp = lt;
+ return (0);
+
+err: if (lt->reginfo.addr != NULL) {
+ UNLOCK_LOCKREGION(lt);
+ (void)__db_rdetach(&lt->reginfo);
+ if (F_ISSET(&lt->reginfo, REGION_CREATED))
+ (void)lock_unlink(path, 1, dbenv);
+ }
+
+ if (lt->reginfo.path != NULL)
+ FREES(lt->reginfo.path);
+ FREE(lt, sizeof(*lt));
+ return (ret);
+}
+
+/*
+ * __lock_tabinit --
+ * Initialize the lock region.
+ */
+static int
+__lock_tabinit(dbenv, lrp)
+ DB_ENV *dbenv;
+ DB_LOCKREGION *lrp;
+{
+ struct __db_lock *lp;
+ struct lock_header *tq_head;
+ struct obj_header *obj_head;
+ DB_LOCKOBJ *op;
+ u_int32_t i, nelements;
+ const u_int8_t *conflicts;
+ u_int8_t *curaddr;
+
+ conflicts = dbenv == NULL || dbenv->lk_conflicts == NULL ?
+ db_rw_conflicts : dbenv->lk_conflicts;
+
+ lrp->table_size = __db_tablesize(lrp->maxlocks);
+ lrp->magic = DB_LOCKMAGIC;
+ lrp->version = DB_LOCKVERSION;
+ lrp->id = 0;
+ /*
+ * These fields (lrp->maxlocks, lrp->nmodes) are initialized
+ * in the caller, since we had to grab those values to size
+ * the region.
+ */
+ lrp->need_dd = 0;
+ lrp->detect = DB_LOCK_NORUN;
+ lrp->numobjs = lrp->maxlocks;
+ lrp->nlockers = 0;
+ lrp->mem_bytes = ALIGN(STRING_SIZE(lrp->maxlocks), sizeof(size_t));
+ lrp->increment = lrp->hdr.size / 2;
+ lrp->nconflicts = 0;
+ lrp->nrequests = 0;
+ lrp->nreleases = 0;
+ lrp->ndeadlocks = 0;
+
+ /*
+ * As we write the region, we've got to maintain the alignment
+ * for the structures that follow each chunk. This information
+ * ends up being encapsulated both in here as well as in the
+ * lock.h file for the XXX_SIZE macros.
+ */
+ /* Initialize conflict matrix. */
+ curaddr = (u_int8_t *)lrp + sizeof(DB_LOCKREGION);
+ memcpy(curaddr, conflicts, lrp->nmodes * lrp->nmodes);
+ curaddr += lrp->nmodes * lrp->nmodes;
+
+ /*
+ * Initialize hash table.
+ */
+ curaddr = (u_int8_t *)ALIGNP(curaddr, LOCK_HASH_ALIGN);
+ lrp->hash_off = curaddr - (u_int8_t *)lrp;
+ nelements = lrp->table_size;
+ __db_hashinit(curaddr, nelements);
+ curaddr += nelements * sizeof(DB_HASHTAB);
+
+ /*
+ * Initialize locks onto a free list. Since locks contains mutexes,
+ * we need to make sure that each lock is aligned on a MUTEX_ALIGNMENT
+ * boundary.
+ */
+ curaddr = (u_int8_t *)ALIGNP(curaddr, MUTEX_ALIGNMENT);
+ tq_head = &lrp->free_locks;
+ SH_TAILQ_INIT(tq_head);
+
+ for (i = 0; i++ < lrp->maxlocks;
+ curaddr += ALIGN(sizeof(struct __db_lock), MUTEX_ALIGNMENT)) {
+ lp = (struct __db_lock *)curaddr;
+ lp->status = DB_LSTAT_FREE;
+ SH_TAILQ_INSERT_HEAD(tq_head, lp, links, __db_lock);
+ }
+
+ /* Initialize objects onto a free list. */
+ obj_head = &lrp->free_objs;
+ SH_TAILQ_INIT(obj_head);
+
+ for (i = 0; i++ < lrp->maxlocks; curaddr += sizeof(DB_LOCKOBJ)) {
+ op = (DB_LOCKOBJ *)curaddr;
+ SH_TAILQ_INSERT_HEAD(obj_head, op, links, __db_lockobj);
+ }
+
+ /*
+ * Initialize the string space; as for all shared memory allocation
+ * regions, this requires size_t alignment, since we store the
+ * lengths of malloc'd areas in the area.
+ */
+ curaddr = (u_int8_t *)ALIGNP(curaddr, sizeof(size_t));
+ lrp->mem_off = curaddr - (u_int8_t *)lrp;
+ __db_shalloc_init(curaddr, lrp->mem_bytes);
+ return (0);
+}
+
+int
+lock_close(lt)
+ DB_LOCKTAB *lt;
+{
+ int ret;
+
+ if ((ret = __db_rdetach(&lt->reginfo)) != 0)
+ return (ret);
+
+ if (lt->reginfo.path != NULL)
+ FREES(lt->reginfo.path);
+ FREE(lt, sizeof(*lt));
+
+ return (0);
+}
+
+int
+lock_unlink(path, force, dbenv)
+ const char *path;
+ int force;
+ DB_ENV *dbenv;
+{
+ REGINFO reginfo;
+ int ret;
+
+ memset(&reginfo, 0, sizeof(reginfo));
+ reginfo.dbenv = dbenv;
+ reginfo.appname = DB_APP_NONE;
+ if (path != NULL && (reginfo.path = (char *)__db_strdup(path)) == NULL)
+ return (ENOMEM);
+ reginfo.file = DB_DEFAULT_LOCK_FILE;
+ ret = __db_runlink(&reginfo, force);
+ if (reginfo.path != NULL)
+ FREES(reginfo.path);
+ return (ret);
+}
+
+/*
+ * __lock_validate_region --
+ * Called at every interface to verify if the region has changed size,
+ * and if so, to remap the region in and reset the process' pointers.
+ *
+ * PUBLIC: int __lock_validate_region __P((DB_LOCKTAB *));
+ */
+int
+__lock_validate_region(lt)
+ DB_LOCKTAB *lt;
+{
+ int ret;
+
+ if (lt->reginfo.size == lt->region->hdr.size)
+ return (0);
+
+ /* Detach/reattach the region. */
+ if ((ret = __db_rreattach(&lt->reginfo, lt->region->hdr.size)) != 0)
+ return (ret);
+
+ /* Reset region information. */
+ lt->region = lt->reginfo.addr;
+ __lock_reset_region(lt);
+
+ return (0);
+}
+
+/*
+ * __lock_grow_region --
+ * We have run out of space; time to grow the region.
+ *
+ * PUBLIC: int __lock_grow_region __P((DB_LOCKTAB *, int, size_t));
+ */
+int
+__lock_grow_region(lt, which, howmuch)
+ DB_LOCKTAB *lt;
+ int which;
+ size_t howmuch;
+{
+ struct __db_lock *newl;
+ struct lock_header *lock_head;
+ struct obj_header *obj_head;
+ DB_LOCKOBJ *op;
+ DB_LOCKREGION *lrp;
+ float lock_ratio, obj_ratio;
+ size_t incr, oldsize, used, usedmem;
+ u_int32_t i, newlocks, newmem, newobjs, usedlocks, usedobjs;
+ u_int8_t *curaddr;
+ int ret;
+
+ lrp = lt->region;
+ oldsize = lrp->hdr.size;
+ incr = lrp->increment;
+
+ /* Figure out how much of each sort of space we have. */
+ usedmem = lrp->mem_bytes - __db_shalloc_count(lt->mem);
+ usedobjs = lrp->numobjs - __lock_count_objs(lrp);
+ usedlocks = lrp->maxlocks - __lock_count_locks(lrp);
+
+ /*
+ * Figure out what fraction of the used space belongs to each
+ * different type of "thing" in the region. Then partition the
+ * new space up according to this ratio.
+ */
+ used = usedmem +
+ usedlocks * ALIGN(sizeof(struct __db_lock), MUTEX_ALIGNMENT) +
+ usedobjs * sizeof(DB_LOCKOBJ);
+
+ lock_ratio = usedlocks *
+ ALIGN(sizeof(struct __db_lock), MUTEX_ALIGNMENT) / (float)used;
+ obj_ratio = usedobjs * sizeof(DB_LOCKOBJ) / (float)used;
+
+ newlocks = (u_int32_t)(lock_ratio *
+ incr / ALIGN(sizeof(struct __db_lock), MUTEX_ALIGNMENT));
+ newobjs = (u_int32_t)(obj_ratio * incr / sizeof(DB_LOCKOBJ));
+ newmem = incr -
+ (newobjs * sizeof(DB_LOCKOBJ) +
+ newlocks * ALIGN(sizeof(struct __db_lock), MUTEX_ALIGNMENT));
+
+ /*
+ * Make sure we allocate enough memory for the object being
+ * requested.
+ */
+ switch (which) {
+ case DB_LOCK_LOCK:
+ if (newlocks == 0) {
+ newlocks = 10;
+ incr += newlocks * sizeof(struct __db_lock);
+ }
+ break;
+ case DB_LOCK_OBJ:
+ if (newobjs == 0) {
+ newobjs = 10;
+ incr += newobjs * sizeof(DB_LOCKOBJ);
+ }
+ break;
+ case DB_LOCK_MEM:
+ if (newmem < howmuch * 2) {
+ incr += howmuch * 2 - newmem;
+ newmem = howmuch * 2;
+ }
+ break;
+ }
+
+ newmem += ALIGN(incr, sizeof(size_t)) - incr;
+ incr = ALIGN(incr, sizeof(size_t));
+
+ /*
+ * Since we are going to be allocating locks at the beginning of the
+ * new chunk, we need to make sure that the chunk is MUTEX_ALIGNMENT
+ * aligned. We did not guarantee this when we created the region, so
+ * we may need to pad the old region by extra bytes to ensure this
+ * alignment.
+ */
+ incr += ALIGN(oldsize, MUTEX_ALIGNMENT) - oldsize;
+
+ __db_err(lt->dbenv,
+ "Growing lock region: %lu locks %lu objs %lu bytes",
+ (u_long)newlocks, (u_long)newobjs, (u_long)newmem);
+
+ if ((ret = __db_rgrow(&lt->reginfo, oldsize + incr)) != 0)
+ return (ret);
+ lt->region = lt->reginfo.addr;
+ __lock_reset_region(lt);
+
+ /* Update region parameters. */
+ lrp = lt->region;
+ lrp->increment = incr << 1;
+ lrp->maxlocks += newlocks;
+ lrp->numobjs += newobjs;
+ lrp->mem_bytes += newmem;
+
+ curaddr = (u_int8_t *)lrp + oldsize;
+ curaddr = (u_int8_t *)ALIGNP(curaddr, MUTEX_ALIGNMENT);
+
+ /* Put new locks onto the free list. */
+ lock_head = &lrp->free_locks;
+ for (i = 0; i++ < newlocks;
+ curaddr += ALIGN(sizeof(struct __db_lock), MUTEX_ALIGNMENT)) {
+ newl = (struct __db_lock *)curaddr;
+ SH_TAILQ_INSERT_HEAD(lock_head, newl, links, __db_lock);
+ }
+
+ /* Put new objects onto the free list. */
+ obj_head = &lrp->free_objs;
+ for (i = 0; i++ < newobjs; curaddr += sizeof(DB_LOCKOBJ)) {
+ op = (DB_LOCKOBJ *)curaddr;
+ SH_TAILQ_INSERT_HEAD(obj_head, op, links, __db_lockobj);
+ }
+
+ *((size_t *)curaddr) = newmem - sizeof(size_t);
+ curaddr += sizeof(size_t);
+ __db_shalloc_free(lt->mem, curaddr);
+
+ return (0);
+}
+
+static void
+__lock_reset_region(lt)
+ DB_LOCKTAB *lt;
+{
+ lt->conflicts = (u_int8_t *)lt->region + sizeof(DB_LOCKREGION);
+ lt->hashtab =
+ (DB_HASHTAB *)((u_int8_t *)lt->region + lt->region->hash_off);
+ lt->mem = (void *)((u_int8_t *)lt->region + lt->region->mem_off);
+}
+
+/*
+ * lock_stat --
+ * Return LOCK statistics.
+ */
+int
+lock_stat(lt, gspp, db_malloc)
+ DB_LOCKTAB *lt;
+ DB_LOCK_STAT **gspp;
+ void *(*db_malloc) __P((size_t));
+{
+ DB_LOCKREGION *rp;
+
+ *gspp = NULL;
+
+ if ((*gspp = db_malloc == NULL ?
+ (DB_LOCK_STAT *)__db_malloc(sizeof(**gspp)) :
+ (DB_LOCK_STAT *)db_malloc(sizeof(**gspp))) == NULL)
+ return (ENOMEM);
+
+ /* Copy out the global statistics. */
+ LOCK_LOCKREGION(lt);
+
+ rp = lt->region;
+ (*gspp)->st_magic = rp->magic;
+ (*gspp)->st_version = rp->version;
+ (*gspp)->st_maxlocks = rp->maxlocks;
+ (*gspp)->st_nmodes = rp->nmodes;
+ (*gspp)->st_numobjs = rp->numobjs;
+ (*gspp)->st_nlockers = rp->nlockers;
+ (*gspp)->st_nconflicts = rp->nconflicts;
+ (*gspp)->st_nrequests = rp->nrequests;
+ (*gspp)->st_nreleases = rp->nreleases;
+ (*gspp)->st_ndeadlocks = rp->ndeadlocks;
+ (*gspp)->st_region_nowait = rp->hdr.lock.mutex_set_nowait;
+ (*gspp)->st_region_wait = rp->hdr.lock.mutex_set_wait;
+ (*gspp)->st_refcnt = rp->hdr.refcnt;
+ (*gspp)->st_regsize = rp->hdr.size;
+
+ UNLOCK_LOCKREGION(lt);
+
+ return (0);
+}
+
+static u_int32_t
+__lock_count_locks(lrp)
+ DB_LOCKREGION *lrp;
+{
+ struct __db_lock *newl;
+ u_int32_t count;
+
+ count = 0;
+ for (newl = SH_TAILQ_FIRST(&lrp->free_locks, __db_lock);
+ newl != NULL;
+ newl = SH_TAILQ_NEXT(newl, links, __db_lock))
+ count++;
+
+ return (count);
+}
+
+static u_int32_t
+__lock_count_objs(lrp)
+ DB_LOCKREGION *lrp;
+{
+ DB_LOCKOBJ *obj;
+ u_int32_t count;
+
+ count = 0;
+ for (obj = SH_TAILQ_FIRST(&lrp->free_objs, __db_lockobj);
+ obj != NULL;
+ obj = SH_TAILQ_NEXT(obj, links, __db_lockobj))
+ count++;
+
+ return (count);
+}
+
+#define LOCK_DUMP_CONF 0x001 /* Conflict matrix. */
+#define LOCK_DUMP_FREE 0x002 /* Display lock free list. */
+#define LOCK_DUMP_LOCKERS 0x004 /* Display lockers. */
+#define LOCK_DUMP_MEM 0x008 /* Display region memory. */
+#define LOCK_DUMP_OBJECTS 0x010 /* Display objects. */
+#define LOCK_DUMP_ALL 0x01f /* Display all. */
+
+/*
+ * __lock_dump_region --
+ *
+ * PUBLIC: void __lock_dump_region __P((DB_LOCKTAB *, char *, FILE *));
+ */
+void
+__lock_dump_region(lt, area, fp)
+ DB_LOCKTAB *lt;
+ char *area;
+ FILE *fp;
+{
+ struct __db_lock *lp;
+ DB_LOCKOBJ *op;
+ DB_LOCKREGION *lrp;
+ u_int32_t flags, i, j;
+ int label;
+
+ /* Make it easy to call from the debugger. */
+ if (fp == NULL)
+ fp = stderr;
+
+ for (flags = 0; *area != '\0'; ++area)
+ switch (*area) {
+ case 'A':
+ LF_SET(LOCK_DUMP_ALL);
+ break;
+ case 'c':
+ LF_SET(LOCK_DUMP_CONF);
+ break;
+ case 'f':
+ LF_SET(LOCK_DUMP_FREE);
+ break;
+ case 'l':
+ LF_SET(LOCK_DUMP_LOCKERS);
+ break;
+ case 'm':
+ LF_SET(LOCK_DUMP_MEM);
+ break;
+ case 'o':
+ LF_SET(LOCK_DUMP_OBJECTS);
+ break;
+ }
+
+ lrp = lt->region;
+
+ fprintf(fp, "%s\nLock region parameters\n", DB_LINE);
+ fprintf(fp, "%s: %lu, %s: %lu, %s: %lu, %s: %lu\n%s: %lu, %s: %lu\n",
+ "table size", (u_long)lrp->table_size,
+ "hash_off", (u_long)lrp->hash_off,
+ "increment", (u_long)lrp->increment,
+ "mem_off", (u_long)lrp->mem_off,
+ "mem_bytes", (u_long)lrp->mem_bytes,
+ "need_dd", (u_long)lrp->need_dd);
+
+ if (LF_ISSET(LOCK_DUMP_CONF)) {
+ fprintf(fp, "\n%s\nConflict matrix\n", DB_LINE);
+ for (i = 0; i < lrp->nmodes; i++) {
+ for (j = 0; j < lrp->nmodes; j++)
+ fprintf(fp, "%lu\t",
+ (u_long)lt->conflicts[i * lrp->nmodes + j]);
+ fprintf(fp, "\n");
+ }
+ }
+
+ if (LF_ISSET(LOCK_DUMP_LOCKERS | LOCK_DUMP_OBJECTS)) {
+ fprintf(fp, "%s\nLock hash buckets\n", DB_LINE);
+ for (i = 0; i < lrp->table_size; i++) {
+ label = 1;
+ for (op = SH_TAILQ_FIRST(&lt->hashtab[i], __db_lockobj);
+ op != NULL;
+ op = SH_TAILQ_NEXT(op, links, __db_lockobj)) {
+ if (LF_ISSET(LOCK_DUMP_LOCKERS) &&
+ op->type == DB_LOCK_LOCKER) {
+ if (label) {
+ fprintf(fp,
+ "Bucket %lu:\n", (u_long)i);
+ label = 0;
+ }
+ __lock_dump_locker(lt, op, fp);
+ }
+ if (LF_ISSET(LOCK_DUMP_OBJECTS) &&
+ op->type == DB_LOCK_OBJTYPE) {
+ if (label) {
+ fprintf(fp,
+ "Bucket %lu:\n", (u_long)i);
+ label = 0;
+ }
+ __lock_dump_object(lt, op, fp);
+ }
+ }
+ }
+ }
+
+ if (LF_ISSET(LOCK_DUMP_FREE)) {
+ fprintf(fp, "%s\nLock free list\n", DB_LINE);
+ for (lp = SH_TAILQ_FIRST(&lrp->free_locks, __db_lock);
+ lp != NULL;
+ lp = SH_TAILQ_NEXT(lp, links, __db_lock))
+ fprintf(fp, "0x%x: %lu\t%lu\t%s\t0x%x\n", (u_int)lp,
+ (u_long)lp->holder, (u_long)lp->mode,
+ __lock_dump_status(lp->status), (u_int)lp->obj);
+
+ fprintf(fp, "%s\nObject free list\n", DB_LINE);
+ for (op = SH_TAILQ_FIRST(&lrp->free_objs, __db_lockobj);
+ op != NULL;
+ op = SH_TAILQ_NEXT(op, links, __db_lockobj))
+ fprintf(fp, "0x%x\n", (u_int)op);
+ }
+
+ if (LF_ISSET(LOCK_DUMP_MEM))
+ __db_shalloc_dump(lt->mem, fp);
+}
+
+static void
+__lock_dump_locker(lt, op, fp)
+ DB_LOCKTAB *lt;
+ DB_LOCKOBJ *op;
+ FILE *fp;
+{
+ struct __db_lock *lp;
+ u_int32_t locker;
+ void *ptr;
+
+ ptr = SH_DBT_PTR(&op->lockobj);
+ memcpy(&locker, ptr, sizeof(u_int32_t));
+ fprintf(fp, "L %lx", (u_long)locker);
+
+ lp = SH_LIST_FIRST(&op->heldby, __db_lock);
+ if (lp == NULL) {
+ fprintf(fp, "\n");
+ return;
+ }
+ for (; lp != NULL; lp = SH_LIST_NEXT(lp, locker_links, __db_lock))
+ __lock_printlock(lt, lp, 0);
+}
+
+static void
+__lock_dump_object(lt, op, fp)
+ DB_LOCKTAB *lt;
+ DB_LOCKOBJ *op;
+ FILE *fp;
+{
+ struct __db_lock *lp;
+ u_int32_t j;
+ u_int8_t *ptr;
+ u_int ch;
+
+ ptr = SH_DBT_PTR(&op->lockobj);
+ for (j = 0; j < op->lockobj.size; ptr++, j++) {
+ ch = *ptr;
+ fprintf(fp, isprint(ch) ? "%c" : "\\%o", ch);
+ }
+ fprintf(fp, "\n");
+
+ fprintf(fp, "H:");
+ for (lp =
+ SH_TAILQ_FIRST(&op->holders, __db_lock);
+ lp != NULL;
+ lp = SH_TAILQ_NEXT(lp, links, __db_lock))
+ __lock_printlock(lt, lp, 0);
+ lp = SH_TAILQ_FIRST(&op->waiters, __db_lock);
+ if (lp != NULL) {
+ fprintf(fp, "\nW:");
+ for (; lp != NULL; lp = SH_TAILQ_NEXT(lp, links, __db_lock))
+ __lock_printlock(lt, lp, 0);
+ }
+}
+
+static const char *
+__lock_dump_status(status)
+ db_status_t status;
+{
+ switch (status) {
+ case DB_LSTAT_ABORTED:
+ return ("aborted");
+ case DB_LSTAT_ERR:
+ return ("err");
+ case DB_LSTAT_FREE:
+ return ("free");
+ case DB_LSTAT_HELD:
+ return ("held");
+ case DB_LSTAT_NOGRANT:
+ return ("nogrant");
+ case DB_LSTAT_PENDING:
+ return ("pending");
+ case DB_LSTAT_WAITING:
+ return ("waiting");
+ }
+ return ("unknown status");
+}
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-24 13:51:19 +0000