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1997-08-10 19:17 Philip Blundell <Philip.Blundell@pobox.com> * nss/nss_db/db-XXX.c: Include <db_185.h> not <db.h>. Somebody should update this to use the new db API. * nss/nss_db/db-netgrp.c: Likewise. * nss/nss_db/db-alias.c: Likewise. * db2/Makefile: Makefile for db-2.x in glibc. 1997-08-27 21:20 Ulrich Drepper <drepper@cygnus.com> * csu/Makefile (before-compile): New goal. Make sure abi-tag.h is generated. [$(elf)=yes] (asm-CPPFLAGS): Make sure abi-tag.h file can be found. * Makeconfig [$(build-omitfp)=yes] (CFLAGS-.o): Add -D__USE_STRING_INLINES. * string/string.f: Move strnlen optimization after inclusion of <bits/string.h>. Include <bits/string.h> only if __USE_STRING_INLINES is defined. * sysdeps/generic/memcpy.c: Undef memcpy to allow macro of this name in <bits/string.h>. * sysdeps/generic/memset.c: Likewise. * sysdeps/i386/string.h: i386 optimized string functions. * sysdeps/i386/i486string.h: i486+ optimized string functions. * Makefile (subdirs): Change db to db2. * shlib-versions: Bump libdb verion number to 3. * include/db.h: Include from db2 directory. * include/db_185.h: New file. * sysdeps/i386/Makefile [$(subdirs)=db2] (CPPFLAGS): Add macros to provide spinlock information for db2. * sysdeps/m68k/m68020/Makefile: New file. Likewise. * sysdeps/sparc/Makefile: New file. Likewise. * sysdeps/unix/sysv/linux/Makefile [$(subdirs)=db2] (CPPFLAGS): Add -DHAVE_LLSEEK. * db2/config.h: Hand-edited config file for db2 in glibc. * db2/compat.h: New file from db-2.3.4. * db2/db.h: Likewise. * db2/db_185.h: Likewise. * db2/db_int.h: Likewise. * db2/makedb.c: Likewise. * db2/btree/bt_close.c: Likewise. * db2/btree/bt_compare.c: Likewise. * db2/btree/bt_conv.c: Likewise. * db2/btree/bt_cursor.c: Likewise. * db2/btree/bt_delete.c: Likewise. * db2/btree/bt_open.c: Likewise. * db2/btree/bt_page.c: Likewise. * db2/btree/bt_put.c: Likewise. * db2/btree/bt_rec.c: Likewise. * db2/btree/bt_recno.c: Likewise. * db2/btree/btree_auto.c: Likewise. * db2/btree/bt_rsearch.c: Likewise. * db2/btree/bt_search.c: Likewise. * db2/btree/bt_split.c: Likewise. * db2/btree/bt_stat.c: Likewise. * db2/btree/btree.src: Likewise. * db2/common/db_appinit.c: Likewise. * db2/common/db_err.c: Likewise. * db2/common/db_byteorder.c: Likewise. * db2/common/db_apprec.c: Likewise. * db2/common/db_salloc.c: Likewise. * db2/common/db_log2.c: Likewise. * db2/common/db_region.c: Likewise. * db2/common/db_shash.c: Likewise. * db2/db/db.c: Likewise. * db2/db/db.src: Likewise. * db2/db/db_conv.c: Likewise. * db2/db/db_dispatch.c: Likewise. * db2/db/db_dup.c: Likewise. * db2/db/db_overflow.c: Likewise. * db2/db/db_pr.c: Likewise. * db2/db/db_rec.c: Likewise. * db2/db/db_ret.c: Likewise. * db2/db/db_thread.c: Likewise. * db2/db/db_auto.c: Likewise. * db2/db185/db185.c: Likewise. * db2/db185/db185_int.h: Likewise. * db2/dbm/dbm.c: Likewise. * db2/hash/hash.c: Likewise. * db2/hash/hash.src: Likewise. * db2/hash/hash_page.c: Likewise. * db2/hash/hash_conv.c: Likewise. * db2/hash/hash_debug.c: Likewise. * db2/hash/hash_stat.c: Likewise. * db2/hash/hash_rec.c: Likewise. * db2/hash/hash_dup.c: Likewise. * db2/hash/hash_func.c: Likewise. * db2/hash/hash_auto.c: Likewise. * db2/include/mp.h: Likewise. * db2/include/btree.h: Likewise. * db2/include/db.h.src: Likewise. * db2/include/db_int.h.src: Likewise. * db2/include/db_shash.h: Likewise. * db2/include/db_swap.h: Likewise. * db2/include/db_185.h.src: Likewise. * db2/include/txn.h: Likewise. * db2/include/db_am.h: Likewise. * db2/include/shqueue.h: Likewise. * db2/include/hash.h: Likewise. * db2/include/db_dispatch.h: Likewise. * db2/include/lock.h: Likewise. * db2/include/db_page.h: Likewise. * db2/include/log.h: Likewise. * db2/include/db_auto.h: Likewise. * db2/include/btree_auto.h: Likewise. * db2/include/hash_auto.h: Likewise. * db2/include/log_auto.h: Likewise. * db2/include/txn_auto.h: Likewise. * db2/include/db_ext.h: Likewise. * db2/include/btree_ext.h: Likewise. * db2/include/clib_ext.h: Likewise. * db2/include/common_ext.h: Likewise. * db2/include/hash_ext.h: Likewise. * db2/include/lock_ext.h: Likewise. * db2/include/log_ext.h: Likewise. * db2/include/mp_ext.h: Likewise. * db2/include/mutex_ext.h: Likewise. * db2/include/os_ext.h: Likewise. * db2/include/txn_ext.h: Likewise. * db2/include/cxx_int.h: Likewise. * db2/include/db_cxx.h: Likewise. * db2/include/queue.h: Likewise. * db2/lock/lock.c: Likewise. * db2/lock/lock_conflict.c: Likewise. * db2/lock/lock_util.c: Likewise. * db2/lock/lock_deadlock.c: Likewise. * db2/log/log.c: Likewise. * db2/log/log_get.c: Likewise. * db2/log/log.src: Likewise. * db2/log/log_compare.c: Likewise. * db2/log/log_put.c: Likewise. * db2/log/log_rec.c: Likewise. * db2/log/log_archive.c: Likewise. * db2/log/log_register.c: Likewise. * db2/log/log_auto.c: Likewise. * db2/log/log_findckp.c: Likewise. * db2/mp/mp_bh.c: Likewise. * db2/mp/mp_fget.c: Likewise. * db2/mp/mp_fopen.c: Likewise. * db2/mp/mp_fput.c: Likewise. * db2/mp/mp_fset.c: Likewise. * db2/mp/mp_open.c: Likewise. * db2/mp/mp_region.c: Likewise. * db2/mp/mp_pr.c: Likewise. * db2/mp/mp_sync.c: Likewise. * db2/mutex/68020.gcc: Likewise. * db2/mutex/mutex.c: Likewise. * db2/mutex/README: Likewise. * db2/mutex/x86.gcc: Likewise. * db2/mutex/sparc.gcc: Likewise. * db2/mutex/uts4.cc.s: Likewise. * db2/mutex/alpha.dec: Likewise. * db2/mutex/alpha.gcc: Likewise. * db2/mutex/parisc.gcc: Likewise. * db2/mutex/parisc.hp: Likewise. * db2/os/db_os_abs.c: Likewise. * db2/os/db_os_dir.c: Likewise. * db2/os/db_os_fid.c: Likewise. * db2/os/db_os_lseek.c: Likewise. * db2/os/db_os_mmap.c: Likewise. * db2/os/db_os_open.c: Likewise. * db2/os/db_os_rw.c: Likewise. * db2/os/db_os_sleep.c: Likewise. * db2/os/db_os_stat.c: Likewise. * db2/os/db_os_unlink.c: Likewise. * db2/txn/txn.c: Likewise. * db2/txn/txn.src: Likewise. * db2/txn/txn_rec.c: Likewise. * db2/txn/txn_auto.c: Likewise. * db2/clib/getlong.c: Likewise. * db2/progs/db_archive/db_archive.c: Likewise. * db2/progs/db_checkpoint/db_checkpoint.c: Likewise. * db2/progs/db_deadlock/db_deadlock.c: Likewise. * db2/progs/db_dump/db_dump.c: Likewise. * db2/progs/db_dump185/db_dump185.c: Likewise. * db2/progs/db_load/db_load.c: Likewise. * db2/progs/db_printlog/db_printlog.c: Likewise. * db2/progs/db_recover/db_recover.c: Likewise. * db2/progs/db_stat/db_stat.c: Likewise. * libio/stdio.h [__cplusplus] (__STDIO_INLINE): Define as inline. * po/de.po, po/sv.po: Update from 2.0.5 translations. * sysdeps/unix/sysv/linux/netinet/tcp.h: Pretty print. * sunrpc/rpc/xdr.h (XDR): Don't define argument of x_destroy callback as const. * sunrpc/xdr_mem.c (xdrmem_destroy): Don't define argument as const. * sunrpx/xdr_rec.c (xdrrec_destroy): Likewise. * sunrpx/xdr_stdio.c (xdrstdio_destroy): Likewise. 1997-08-27 18:47 Ulrich Drepper <drepper@cygnus.com> * sysdeps/unix/sysv/linux/if_index.c: Include <errno.h>. Reported by Benjamin Kosnik <bkoz@cygnus.com>. 1997-08-27 02:27 Roland McGrath <roland@baalperazim.frob.com> * abi-tags: New file. * csu/Makefile (distribute): Remove abi-tag.h. ($(objpfx)abi-tag.h): New target. * Makefile (distribute): Add abi-tags. * sysdeps/unix/sysv/linux/abi-tag.h: File removed. * sysdeps/mach/hurd/abi-tag.h: File removed. * sysdeps/stub/abi-tag.h: File removed. 1997-08-25 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/unix/make-syscalls.sh: Change output so that it generates compilation rules only for the currently selected object suffixes. 1997-08-25 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * sysdeps/m68k/dl-machine.h (RTLD_START): Switch back to previous section to avoid confusing the compiler. * sysdeps/alpha/dl-machine.h (RTLD_START): Likewise. * sysdeps/i386/dl-machine.h (RTLD_START): Likewise. * sysdeps/mips/dl-machine.h (RTLD_START): Likewise. * sysdeps/mips/mips64/dl-machine.h (RTLD_START): Likewise. * sysdeps/sparc/sparc32/dl-machine.h (RTLD_START): Likewise. * sysdeps/m68k/dl-machine.h (elf_machine_load_address): Use a GOT relocation instead of a constant to avoid text relocation. (ELF_MACHINE_BEFORE_RTLD_RELOC): Removed. (RTLD_START): Declare global labels as functions and add size directive. 1997-08-25 17:01 Ulrich Drepper <drepper@cygnus.com> * sysdeps/i386/bits/select.h: Correct assembler versions to work even for descriptors >= 32. * stdlib/alloca.h: Don't define alloca to __alloca since if gcc is used __alloca is not defined to __builtin_alloca and so might not be available. Reported by Uwe Ohse <uwe@ohse.de>. * sysdeps/unix/sysv/linux/sys/sysmacros.h: Define macros in a special way if gcc is not used and so dev_t is an array. Reported by Uwe Ohse <uwe@ohse.de>. 1997-08-23 Andreas Schwab <schwab@issan.informatik.uni-dortmund.de> * manual/libc.texinfo: Reorder chapters to match logical order. 1997-08-25 12:22 Ulrich Drepper <drepper@cygnus.com> * sunrpc/rpc/xdr.h: Change name of parameters in prototypes of xdr_reference, xdrmem_create, and xdrstdio_create because of clash with g++ internal symbols. Patch by Sudish Joseph <sj@eng.mindspring.net>. * elf/dl-deps.c: Implement handling of DT_FILTER.
497 lines
12 KiB
C
497 lines
12 KiB
C
/*-
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* See the file LICENSE for redistribution information.
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*
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* Copyright (c) 1996, 1997
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* Sleepycat Software. All rights reserved.
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*/
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#include "config.h"
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#ifndef lint
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static const char copyright[] =
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"@(#) Copyright (c) 1997\n\
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Sleepycat Software Inc. All rights reserved.\n";
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static const char sccsid[] = "@(#)lock_deadlock.c 10.20 (Sleepycat) 8/21/97";
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#endif
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#ifndef NO_SYSTEM_INCLUDES
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#include <sys/types.h>
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#include <errno.h>
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#include <string.h>
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#include <stdlib.h>
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#endif
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#include "db_int.h"
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#include "shqueue.h"
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#include "db_shash.h"
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#include "lock.h"
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#include "common_ext.h"
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#define ISSET_MAP(M, N) (M[(N) / 32] & (1 << (N) % 32))
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#define CLEAR_MAP(M, N) { \
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u_int32_t __i; \
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for (__i = 0; __i < (N); __i++) \
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M[__i] = 0; \
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}
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#define SET_MAP(M, B) (M[(B) / 32] |= (1 << ((B) % 32)))
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#define CLR_MAP(M, B) (M[(B) / 32] &= ~(1 << ((B) % 32)))
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#define OR_MAP(D, S, N) { \
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u_int32_t __i; \
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for (__i = 0; __i < (N); __i++) \
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D[__i] |= S[__i]; \
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}
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#define BAD_KILLID 0xffffffff
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typedef struct {
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int valid;
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u_int32_t id;
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DB_LOCK last_lock;
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} locker_info;
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static int __dd_abort __P((DB_ENV *, locker_info *));
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static int __dd_build __P((DB_ENV *, u_int32_t **, int *, locker_info **));
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#ifdef DEBUG
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static void __dd_debug __P((DB_ENV *, locker_info *, u_int32_t *, int));
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#endif
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static u_int32_t
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*__dd_find __P((u_int32_t *, locker_info *, u_int32_t));
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int
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lock_detect(lt, flags, atype)
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DB_LOCKTAB *lt;
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int flags;
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u_int32_t atype;
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{
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DB_ENV *dbenv;
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locker_info *idmap;
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u_int32_t *bitmap, *deadlock, killid;
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int do_pass, i, nlockers, nentries, ret;
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/* Validate arguments. */
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if ((ret =
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__db_fchk(lt->dbenv, "lock_detect", flags, DB_LOCK_CONFLICT)) != 0)
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return (ret);
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/* Check if a detector run is necessary. */
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do_pass = 1;
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dbenv = lt->dbenv;
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if (LF_ISSET(DB_LOCK_CONFLICT)) {
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/* Make a pass every time a lock waits. */
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LOCK_LOCKREGION(lt);
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do_pass = dbenv->lk_info->region->need_dd != 0;
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UNLOCK_LOCKREGION(lt);
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}
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if (!do_pass)
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return (0);
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/* Build the waits-for bitmap. */
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if ((ret = __dd_build(dbenv, &bitmap, &nlockers, &idmap)) != 0)
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return (ret);
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if (nlockers == 0)
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return (0);
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#ifdef DEBUG
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if (dbenv->db_verbose != 0)
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__dd_debug(dbenv, idmap, bitmap, nlockers);
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#endif
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/* Find a deadlock. */
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deadlock = __dd_find(bitmap, idmap, nlockers);
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nentries = ALIGN(nlockers, 32) / 32;
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killid = BAD_KILLID;
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if (deadlock != NULL) {
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/* Kill someone. */
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switch (atype) {
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case DB_LOCK_OLDEST:
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/*
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* Find the first bit set in the current
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* array and then look for a lower tid in
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* the array.
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*/
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for (i = 0; i < nlockers; i++)
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if (ISSET_MAP(deadlock, i))
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killid = i;
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if (killid == BAD_KILLID) {
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__db_err(dbenv,
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"warning: could not find %s",
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"locker to abort");
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break;
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}
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/*
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* The oldest transaction has the lowest
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* transaction id.
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*/
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for (i = killid + 1; i < nlockers; i++)
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if (ISSET_MAP(deadlock, i) &&
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idmap[i].id < idmap[killid].id)
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killid = i;
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break;
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case DB_LOCK_DEFAULT:
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case DB_LOCK_RANDOM:
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/*
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* We are trying to calculate the id of the
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* locker whose entry is indicated by deadlock.
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* We know that this is less than nlockers, so
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* the cast below is valid.
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*/
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killid =
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(u_int32_t)((deadlock - bitmap) / nentries);
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break;
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case DB_LOCK_YOUNGEST:
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/*
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* Find the first bit set in the current
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* array and then look for a lower tid in
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* the array.
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*/
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for (i = 0; i < nlockers; i++)
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if (ISSET_MAP(deadlock, i))
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killid = i;
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if (killid == BAD_KILLID) {
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__db_err(dbenv,
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"warning: could not find %s",
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"locker to abort");
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break;
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}
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/*
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* The youngest transaction has the highest
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* transaction id.
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*/
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for (i = killid + 1; i < nlockers; i++)
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if (ISSET_MAP(deadlock, i) &&
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idmap[i].id > idmap[killid].id)
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killid = i;
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break;
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default:
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killid = BAD_KILLID;
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ret = EINVAL;
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}
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/* Kill the locker with lockid idmap[killid]. */
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if (dbenv->db_verbose != 0 && killid != BAD_KILLID)
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__db_err(dbenv, "Aborting locker %lx",
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(u_long)idmap[killid].id);
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if (killid != BAD_KILLID &&
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(ret = __dd_abort(dbenv, &idmap[killid])) != 0)
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__db_err(dbenv,
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"warning: unable to abort locker %lx",
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(u_long)idmap[killid].id);
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}
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free(bitmap);
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free(idmap);
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return (ret);
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}
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/*
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* ========================================================================
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* Utilities
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*/
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static int
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__dd_build(dbenv, bmp, nlockers, idmap)
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DB_ENV *dbenv;
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u_int32_t **bmp;
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int *nlockers;
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locker_info **idmap;
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{
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DB_LOCKTAB *lt;
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DB_LOCKOBJ *op, *lockerp;
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struct __db_lock *lp;
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u_int32_t *bitmap, count, *entryp, i, id, nentries, *tmpmap;
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locker_info *id_array;
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int is_first, ret;
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lt = dbenv->lk_info;
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/*
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* We'll check how many lockers there are, add a few more in for
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* good measure and then allocate all the structures. Then we'll
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* verify that we have enough room when we go back in and get the
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* mutex the second time.
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*/
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LOCK_LOCKREGION(lt);
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retry: count = lt->region->nlockers;
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lt->region->need_dd = 0;
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UNLOCK_LOCKREGION(lt);
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if (count == 0) {
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*nlockers = 0;
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return (0);
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}
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if (dbenv->db_verbose)
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__db_err(dbenv, "%lu lockers", (u_long)count);
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count += 10;
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nentries = ALIGN(count, 32) / 32;
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/*
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* Allocate enough space for a count by count bitmap matrix.
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*
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* XXX
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* We can probably save the malloc's between iterations just
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* reallocing if necessary because count grew by too much.
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*/
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if ((bitmap = (u_int32_t *)calloc((size_t)count,
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sizeof(u_int32_t) * nentries)) == NULL) {
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__db_err(dbenv, "%s", strerror(ENOMEM));
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return (ENOMEM);
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}
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if ((tmpmap =
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(u_int32_t *)calloc(sizeof(u_int32_t), nentries)) == NULL) {
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__db_err(dbenv, "%s", strerror(ENOMEM));
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free(bitmap);
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return (ENOMEM);
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}
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if ((id_array = (locker_info *)calloc((size_t)count,
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sizeof(locker_info))) == NULL) {
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__db_err(dbenv, "%s", strerror(ENOMEM));
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free(bitmap);
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free(tmpmap);
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return (ENOMEM);
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}
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/*
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* Now go back in and actually fill in the matrix.
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*/
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LOCK_LOCKREGION(lt);
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if (lt->region->nlockers > count) {
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free(bitmap);
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free(tmpmap);
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free(id_array);
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goto retry;
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}
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/*
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* First we go through and assign each locker a deadlock detector id.
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* Note that we fill in the idmap in the next loop since that's the
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* only place where we conveniently have both the deadlock id and the
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* actual locker.
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*/
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for (id = 0, i = 0; i < lt->region->table_size; i++)
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for (op = SH_TAILQ_FIRST(<->hashtab[i], __db_lockobj);
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op != NULL; op = SH_TAILQ_NEXT(op, links, __db_lockobj))
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if (op->type == DB_LOCK_LOCKER)
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op->dd_id = id++;
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/*
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* We go through the hash table and find each object. For each object,
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* we traverse the waiters list and add an entry in the waitsfor matrix
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* for each waiter/holder combination.
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*/
|
|
for (i = 0; i < lt->region->table_size; i++) {
|
|
for (op = SH_TAILQ_FIRST(<->hashtab[i], __db_lockobj);
|
|
op != NULL; op = SH_TAILQ_NEXT(op, links, __db_lockobj)) {
|
|
if (op->type != DB_LOCK_OBJTYPE)
|
|
continue;
|
|
CLEAR_MAP(tmpmap, nentries);
|
|
|
|
/*
|
|
* First we go through and create a bit map that
|
|
* represents all the holders of this object.
|
|
*/
|
|
for (lp = SH_TAILQ_FIRST(&op->holders, __db_lock);
|
|
lp != NULL;
|
|
lp = SH_TAILQ_NEXT(lp, links, __db_lock)) {
|
|
if ((errno = __lock_getobj(lt, lp->holder,
|
|
NULL, DB_LOCK_LOCKER, &lockerp)) != 0) {
|
|
__db_err(dbenv,
|
|
"warning unable to find object");
|
|
continue;
|
|
}
|
|
id_array[lockerp->dd_id].id = lp->holder;
|
|
id_array[lockerp->dd_id].valid = 1;
|
|
|
|
/*
|
|
* If the holder has already been aborted, then
|
|
* we should ignore it for now.
|
|
*/
|
|
if (lp->status == DB_LSTAT_HELD)
|
|
SET_MAP(tmpmap, lockerp->dd_id);
|
|
}
|
|
|
|
/*
|
|
* Next, for each waiter, we set its row in the matrix
|
|
* equal to the map of holders we set up above.
|
|
*/
|
|
for (is_first = 1,
|
|
lp = SH_TAILQ_FIRST(&op->waiters, __db_lock);
|
|
lp != NULL;
|
|
is_first = 0,
|
|
lp = SH_TAILQ_NEXT(lp, links, __db_lock)) {
|
|
if ((ret = __lock_getobj(lt,
|
|
lp->holder, NULL, DB_LOCK_LOCKER, &lockerp))
|
|
!= 0) {
|
|
__db_err(dbenv,
|
|
"warning unable to find object");
|
|
continue;
|
|
}
|
|
id_array[lockerp->dd_id].id = lp->holder;
|
|
id_array[lockerp->dd_id].valid = 1;
|
|
|
|
/*
|
|
* If the transaction is pending abortion, then
|
|
* ignore it on this iteration.
|
|
*/
|
|
if (lp->status != DB_LSTAT_WAITING)
|
|
continue;
|
|
|
|
entryp = bitmap + (nentries * lockerp->dd_id);
|
|
OR_MAP(entryp, tmpmap, nentries);
|
|
/*
|
|
* If this is the first waiter on the queue,
|
|
* then we remove the waitsfor relationship
|
|
* with oneself. However, if it's anywhere
|
|
* else on the queue, then we have to keep
|
|
* it and we have an automatic deadlock.
|
|
*/
|
|
if (is_first)
|
|
CLR_MAP(entryp, lockerp->dd_id);
|
|
}
|
|
}
|
|
}
|
|
|
|
/* Now for each locker; record its last lock. */
|
|
for (id = 0; id < count; id++) {
|
|
if (!id_array[id].valid)
|
|
continue;
|
|
if ((ret = __lock_getobj(lt,
|
|
id_array[id].id, NULL, DB_LOCK_LOCKER, &lockerp)) != 0) {
|
|
__db_err(dbenv,
|
|
"No locks for locker %lu", (u_long)id_array[id].id);
|
|
continue;
|
|
}
|
|
lp = SH_LIST_FIRST(&lockerp->heldby, __db_lock);
|
|
if (lp != NULL)
|
|
id_array[id].last_lock = LOCK_TO_OFFSET(lt, lp);
|
|
}
|
|
|
|
/* Pass complete, reset the deadlock detector bit. */
|
|
lt->region->need_dd = 0;
|
|
UNLOCK_LOCKREGION(lt);
|
|
|
|
/*
|
|
* Now we can release everything except the bitmap matrix that we
|
|
* created.
|
|
*/
|
|
*nlockers = id;
|
|
*idmap = id_array;
|
|
*bmp = bitmap;
|
|
free(tmpmap);
|
|
return (0);
|
|
}
|
|
|
|
static u_int32_t *
|
|
__dd_find(bmp, idmap, nlockers)
|
|
u_int32_t *bmp;
|
|
locker_info *idmap;
|
|
u_int32_t nlockers;
|
|
{
|
|
u_int32_t i, j, nentries, *mymap, *tmpmap;
|
|
|
|
/*
|
|
* For each locker, or in the bits from the lockers
|
|
* on which that locker is waiting.
|
|
*/
|
|
nentries = ALIGN(nlockers, 32) / 32;
|
|
for (mymap = bmp, i = 0; i < nlockers; i++, mymap += nentries) {
|
|
if (!idmap[i].valid)
|
|
continue;
|
|
for (j = 0; j < nlockers; j++) {
|
|
if (ISSET_MAP(mymap, j)) {
|
|
/* Find the map for this bit. */
|
|
tmpmap = bmp + (nentries * j);
|
|
OR_MAP(mymap, tmpmap, nentries);
|
|
if (ISSET_MAP(mymap, i))
|
|
return (mymap);
|
|
}
|
|
}
|
|
}
|
|
return (NULL);
|
|
}
|
|
|
|
static int
|
|
__dd_abort(dbenv, info)
|
|
DB_ENV *dbenv;
|
|
locker_info *info;
|
|
{
|
|
DB_LOCKTAB *lt;
|
|
DB_LOCKOBJ *lockerp, *sh_obj;
|
|
struct __db_lock *lockp;
|
|
int ret;
|
|
|
|
lt = dbenv->lk_info;
|
|
LOCK_LOCKREGION(lt);
|
|
|
|
/* Find the locker's last lock. */
|
|
if ((ret =
|
|
__lock_getobj(lt, info->id, NULL, DB_LOCK_LOCKER, &lockerp)) != 0)
|
|
goto out;
|
|
|
|
lockp = SH_LIST_FIRST(&lockerp->heldby, __db_lock);
|
|
if (LOCK_TO_OFFSET(lt, lockp) != info->last_lock ||
|
|
lockp == NULL || lockp->status != DB_LSTAT_WAITING)
|
|
goto out;
|
|
|
|
/* Abort lock, take it off list, and wake up this lock. */
|
|
lockp->status = DB_LSTAT_ABORTED;
|
|
lt->region->ndeadlocks++;
|
|
SH_LIST_REMOVE(lockp, locker_links, __db_lock);
|
|
sh_obj = (DB_LOCKOBJ *)((u_int8_t *)lockp + lockp->obj);
|
|
SH_TAILQ_REMOVE(&sh_obj->waiters, lockp, links, __db_lock);
|
|
(void)__db_mutex_unlock(&lockp->mutex, lt->fd);
|
|
|
|
ret = 0;
|
|
|
|
out: UNLOCK_LOCKREGION(lt);
|
|
return (ret);
|
|
}
|
|
|
|
#ifdef DEBUG
|
|
static void
|
|
__dd_debug(dbenv, idmap, bitmap, nlockers)
|
|
DB_ENV *dbenv;
|
|
locker_info *idmap;
|
|
u_int32_t *bitmap;
|
|
int nlockers;
|
|
{
|
|
u_int32_t *mymap;
|
|
int i, j, nentries;
|
|
char *msgbuf;
|
|
|
|
__db_err(dbenv, "Waitsfor array");
|
|
__db_err(dbenv, "waiter\twaiting on");
|
|
/*
|
|
* Alloc space to print 10 bytes per item waited on.
|
|
*/
|
|
if ((msgbuf = (char *)malloc((nlockers + 1) * 10 + 64)) == NULL) {
|
|
errno = ENOMEM;
|
|
__db_err(dbenv, "%s", strerror(errno));
|
|
return;
|
|
}
|
|
|
|
nentries = ALIGN(nlockers, 32) / 32;
|
|
for (mymap = bitmap, i = 0; i < nlockers; i++, mymap += nentries) {
|
|
if (!idmap[i].valid)
|
|
continue;
|
|
sprintf(msgbuf, "%lx\t\t", (u_long)idmap[i].id);/* Waiter. */
|
|
for (j = 0; j < nlockers; j++)
|
|
if (ISSET_MAP(mymap, j))
|
|
sprintf(msgbuf, "%s %lx", msgbuf,
|
|
(u_long)idmap[j].id);
|
|
(void)sprintf(msgbuf,
|
|
"%s %lu", msgbuf, (u_long)idmap[i].last_lock);
|
|
__db_err(dbenv, msgbuf);
|
|
}
|
|
|
|
free(msgbuf);
|
|
}
|
|
#endif
|