1 /* $NetBSD: rf_debugMem.c,v 1.20 2009/03/18 10:22:41 cegger Exp $ */ 2 /* 3 * Copyright (c) 1995 Carnegie-Mellon University. 4 * All rights reserved. 5 * 6 * Author: Daniel Stodolsky, Mark Holland, Jim Zelenka 7 * 8 * Permission to use, copy, modify and distribute this software and 9 * its documentation is hereby granted, provided that both the copyright 10 * notice and this permission notice appear in all copies of the 11 * software, derivative works or modified versions, and any portions 12 * thereof, and that both notices appear in supporting documentation. 13 * 14 * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" 15 * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND 16 * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. 17 * 18 * Carnegie Mellon requests users of this software to return to 19 * 20 * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU 21 * School of Computer Science 22 * Carnegie Mellon University 23 * Pittsburgh PA 15213-3890 24 * 25 * any improvements or extensions that they make and grant Carnegie the 26 * rights to redistribute these changes. 27 */ 28 29 /* debugMem.c: memory usage debugging stuff. 30 * Malloc, Calloc, and Free are #defined everywhere 31 * to do_malloc, do_calloc, and do_free. 32 */ 33 34 #include <sys/cdefs.h> 35 __KERNEL_RCSID(0, "$NetBSD: rf_debugMem.c,v 1.20 2009/03/18 10:22:41 cegger Exp $"); 36 37 #include <dev/raidframe/raidframevar.h> 38 39 #include "rf_threadstuff.h" 40 #include "rf_options.h" 41 #include "rf_debugMem.h" 42 #include "rf_general.h" 43 44 #if RF_DEBUG_MEM 45 46 static long tot_mem_in_use = 0; 47 48 /* Hash table of information about memory allocations */ 49 #define RF_MH_TABLESIZE 1000 50 51 struct mh_struct { 52 void *address; 53 int size; 54 int line; 55 char *filen; 56 char allocated; 57 struct mh_struct *next; 58 }; 59 static struct mh_struct *mh_table[RF_MH_TABLESIZE]; 60 RF_DECLARE_MUTEX(rf_debug_mem_mutex) 61 static int mh_table_initialized = 0; 62 63 static void memory_hash_insert(void *addr, int size, int line, char *filen); 64 static int memory_hash_remove(void *addr, int sz); 65 66 void 67 rf_record_malloc(void *p, int size, int line, char *filen) 68 { 69 RF_ASSERT(size != 0); 70 71 /* RF_LOCK_MUTEX(rf_debug_mem_mutex); */ 72 memory_hash_insert(p, size, line, filen); 73 tot_mem_in_use += size; 74 /* RF_UNLOCK_MUTEX(rf_debug_mem_mutex); */ 75 if ((long) p == rf_memDebugAddress) { 76 printf("Allocate: debug address allocated from line %d file %s\n", line, filen); 77 } 78 } 79 80 void 81 rf_unrecord_malloc(void *p, int sz) 82 { 83 int size; 84 85 /* RF_LOCK_MUTEX(rf_debug_mem_mutex); */ 86 size = memory_hash_remove(p, sz); 87 tot_mem_in_use -= size; 88 /* RF_UNLOCK_MUTEX(rf_debug_mem_mutex); */ 89 if ((long) p == rf_memDebugAddress) { 90 printf("Free: Found debug address\n"); /* this is really only a 91 * flag line for gdb */ 92 } 93 } 94 95 void 96 rf_print_unfreed(void) 97 { 98 int i, foundone = 0; 99 struct mh_struct *p; 100 101 for (i = 0; i < RF_MH_TABLESIZE; i++) { 102 for (p = mh_table[i]; p; p = p->next) 103 if (p->allocated) { 104 if (!foundone) 105 printf("\n\nThere are unfreed memory locations at program shutdown:\n"); 106 foundone = 1; 107 printf("Addr 0x%lx Size %d line %d file %s\n", 108 (long) p->address, p->size, p->line, p->filen); 109 } 110 } 111 if (tot_mem_in_use) { 112 printf("%ld total bytes in use\n", tot_mem_in_use); 113 } 114 } 115 #endif /* RF_DEBUG_MEM */ 116 117 int 118 rf_ConfigureDebugMem(RF_ShutdownList_t **listp) 119 { 120 #if RF_DEBUG_MEM 121 int i; 122 123 rf_mutex_init(&rf_debug_mem_mutex); 124 if (rf_memDebug) { 125 for (i = 0; i < RF_MH_TABLESIZE; i++) 126 mh_table[i] = NULL; 127 mh_table_initialized = 1; 128 } 129 #endif 130 return (0); 131 } 132 133 #if RF_DEBUG_MEM 134 135 #define HASHADDR(_a_) ( (((unsigned long) _a_)>>3) % RF_MH_TABLESIZE ) 136 137 static void 138 memory_hash_insert(void *addr, int size, int line, char *filen) 139 { 140 unsigned long bucket = HASHADDR(addr); 141 struct mh_struct *p; 142 143 RF_ASSERT(mh_table_initialized); 144 145 /* search for this address in the hash table */ 146 for (p = mh_table[bucket]; p && (p->address != addr); p = p->next); 147 if (!p) { 148 RF_Malloc(p, sizeof(struct mh_struct), (struct mh_struct *)); 149 RF_ASSERT(p); 150 p->next = mh_table[bucket]; 151 mh_table[bucket] = p; 152 p->address = addr; 153 p->allocated = 0; 154 } 155 if (p->allocated) { 156 printf("ERROR: reallocated address 0x%lx from line %d, file %s without intervening free\n", (long) addr, line, filen); 157 printf(" last allocated from line %d file %s\n", p->line, p->filen); 158 RF_ASSERT(0); 159 } 160 p->size = size; 161 p->line = line; 162 p->filen = filen; 163 p->allocated = 1; 164 } 165 166 static int 167 memory_hash_remove(void *addr, int sz) 168 { 169 unsigned long bucket = HASHADDR(addr); 170 struct mh_struct *p; 171 172 RF_ASSERT(mh_table_initialized); 173 for (p = mh_table[bucket]; p && (p->address != addr); p = p->next); 174 if (!p) { 175 printf("ERROR: freeing never-allocated address 0x%lx\n", (long) addr); 176 RF_PANIC(); 177 } 178 if (!p->allocated) { 179 printf("ERROR: freeing unallocated address 0x%lx. Last allocation line %d file %s\n", (long) addr, p->line, p->filen); 180 RF_PANIC(); 181 } 182 if (sz > 0 && p->size != sz) { /* you can suppress this error by 183 * using a negative value as the size 184 * to free */ 185 printf("ERROR: incorrect size at free for address 0x%lx: is %d should be %d. Alloc at line %d of file %s\n", (unsigned long) addr, sz, p->size, p->line, p->filen); 186 RF_PANIC(); 187 } 188 p->allocated = 0; 189 return (p->size); 190 } 191 #endif /* RF_DEBUG_MEM */ 192 193 194