1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright 2005 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 /* 30 * Failure routines for libumem (not standalone) 31 */ 32 33 #include <sys/types.h> 34 #include <signal.h> 35 #include <stdarg.h> 36 #include <string.h> 37 38 #include "misc.h" 39 40 static volatile int umem_exiting = 0; 41 #define UMEM_EXIT_ABORT 1 42 43 static mutex_t umem_exit_lock = DEFAULTMUTEX; /* protects umem_exiting */ 44 45 static int 46 firstexit(int type) 47 { 48 if (umem_exiting) 49 return (0); 50 51 (void) mutex_lock(&umem_exit_lock); 52 if (umem_exiting) { 53 (void) mutex_unlock(&umem_exit_lock); 54 return (0); 55 } 56 umem_exiting = type; 57 (void) mutex_unlock(&umem_exit_lock); 58 59 return (1); 60 } 61 62 /* 63 * We can't use abort(3C), since it closes all of the standard library 64 * FILEs, which can call free(). 65 * 66 * In addition, we can't just raise(SIGABRT), since the current handler 67 * might do allocation. We give them once chance, though. 68 */ 69 static void __NORETURN 70 umem_do_abort(void) 71 { 72 if (firstexit(UMEM_EXIT_ABORT)) 73 (void) raise(SIGABRT); 74 75 for (;;) { 76 (void) signal(SIGABRT, SIG_DFL); 77 (void) sigrelse(SIGABRT); 78 (void) raise(SIGABRT); 79 } 80 } 81 82 #define SKIP_FRAMES 1 /* skip the panic frame */ 83 #define ERR_STACK_FRAMES 128 84 85 static void 86 print_stacktrace(void) 87 { 88 uintptr_t cur_stack[ERR_STACK_FRAMES]; 89 90 /* 91 * if we are in a signal context, checking for it will recurse 92 */ 93 uint_t nframes = getpcstack(cur_stack, ERR_STACK_FRAMES, 0); 94 uint_t idx; 95 96 if (nframes > SKIP_FRAMES) { 97 umem_printf("stack trace:\n"); 98 99 for (idx = SKIP_FRAMES; idx < nframes; idx++) { 100 (void) print_sym((void *)cur_stack[idx]); 101 umem_printf("\n"); 102 } 103 } 104 } 105 106 void 107 umem_panic(const char *format, ...) 108 { 109 va_list va; 110 111 va_start(va, format); 112 umem_vprintf(format, va); 113 va_end(va); 114 115 if (format[strlen(format)-1] != '\n') 116 umem_error_enter("\n"); 117 118 print_stacktrace(); 119 120 umem_do_abort(); 121 } 122 123 void 124 umem_err_recoverable(const char *format, ...) 125 { 126 va_list va; 127 128 va_start(va, format); 129 umem_vprintf(format, va); 130 va_end(va); 131 132 if (format[strlen(format)-1] != '\n') 133 umem_error_enter("\n"); 134 135 print_stacktrace(); 136 137 if (umem_abort > 0) 138 umem_do_abort(); 139 } 140 141 int 142 __umem_assert_failed(const char *assertion, const char *file, int line) 143 { 144 umem_panic("Assertion failed: %s, file %s, line %d\n", 145 assertion, file, line); 146 umem_do_abort(); 147 /*NOTREACHED*/ 148 return (0); 149 } 150