diff options
Diffstat (limited to 'zfs/lib/libumem/umem_fail.c')
| -rw-r--r-- | zfs/lib/libumem/umem_fail.c | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/zfs/lib/libumem/umem_fail.c b/zfs/lib/libumem/umem_fail.c new file mode 100644 index 000000000..2bafd2682 --- /dev/null +++ b/zfs/lib/libumem/umem_fail.c @@ -0,0 +1,176 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License, Version 1.0 only + * (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 2005 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ +/* + * Portions Copyright 2006 OmniTI, Inc. + */ + +/* #pragma ident "@(#)umem_fail.c 1.4 05/06/08 SMI" */ + +/* + * Failure routines for libumem (not standalone) + */ + +#include "config.h" +#include <sys/types.h> +#include <signal.h> +#include <stdarg.h> +#include <string.h> +#include <stdio.h> + +#include "misc.h" + +static volatile int umem_exiting = 0; +#define UMEM_EXIT_ABORT 1 + +static mutex_t umem_exit_lock = DEFAULTMUTEX; /* protects umem_exiting */ + +static int +firstexit(int type) +{ + if (umem_exiting) + return (0); + + (void) mutex_lock(&umem_exit_lock); + if (umem_exiting) { + (void) mutex_unlock(&umem_exit_lock); + return (0); + } + umem_exiting = type; + (void) mutex_unlock(&umem_exit_lock); + + return (1); +} + +/* + * We can't use abort(3C), since it closes all of the standard library + * FILEs, which can call free(). + * + * In addition, we can't just raise(SIGABRT), since the current handler + * might do allocation. We give them once chance, though. + */ +static void __NORETURN +umem_do_abort(void) +{ +#ifdef _WIN32 + abort(); +#else + if (firstexit(UMEM_EXIT_ABORT)) { + (void) raise(SIGABRT); + } + + for (;;) { +#if defined(__FreeBSD__) + sigset_t set; + struct sigaction sa; + + sa.sa_handler = SIG_DFL; + (void) sigaction(SIGABRT, &sa, NULL); + (void) sigemptyset (&set); + (void) sigaddset (&set, SIGABRT); + (void) sigprocmask (SIG_UNBLOCK, &set, NULL); + (void) raise (SIGABRT); +#else + (void) signal(SIGABRT, SIG_DFL); + (void) sigrelse(SIGABRT); + (void) raise(SIGABRT); +#endif + } +#endif +} + +#define SKIP_FRAMES 1 /* skip the panic frame */ +#define ERR_STACK_FRAMES 128 + +static void +print_stacktrace(void) +{ + uintptr_t cur_stack[ERR_STACK_FRAMES]; + + /* + * if we are in a signal context, checking for it will recurse + */ + uint_t nframes = getpcstack(cur_stack, ERR_STACK_FRAMES, 0); + uint_t idx; + + if (nframes > SKIP_FRAMES) { + umem_printf("stack trace:\n"); + + for (idx = SKIP_FRAMES; idx < nframes; idx++) { + (void) print_sym((void *)cur_stack[idx]); + umem_printf("\n"); + } + } +} + +void +umem_panic(const char *format, ...) +{ + va_list va; + + va_start(va, format); + umem_vprintf(format, va); + va_end(va); + + if (format[strlen(format)-1] != '\n') + umem_error_enter("\n"); + +#ifdef ECELERITY + va_start(va, format); + ec_debug_vprintf(DCRITICAL, DMEM, format, va); + va_end(va); +#endif + + print_stacktrace(); + + umem_do_abort(); +} + +void +umem_err_recoverable(const char *format, ...) +{ + va_list va; + + va_start(va, format); + umem_vprintf(format, va); + va_end(va); + + if (format[strlen(format)-1] != '\n') + umem_error_enter("\n"); + + print_stacktrace(); + + if (umem_abort > 0) + umem_do_abort(); +} + +int +__umem_assert_failed(const char *assertion, const char *file, int line) +{ + umem_panic("Assertion failed: %s, file %s, line %d\n", + assertion, file, line); + umem_do_abort(); + /*NOTREACHED*/ +} |