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/*
* 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 2006-2008 Message Systems, 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");
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);
/*NOTREACHED*/
return (0);
}
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