1 /* $NetBSD: rf_debugMem.c,v 1.11 2002/09/16 23:40:57 oster 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 * if RF_UTILITY is nonzero, it means were compiling one of the 34 * raidframe utility programs, such as rfctrl or smd. In this 35 * case, we eliminate all references to the threads package 36 * and to the allocation list stuff. 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: rf_debugMem.c,v 1.11 2002/09/16 23:40:57 oster Exp $"); 41 42 #include <dev/raidframe/raidframevar.h> 43 44 #include "rf_threadstuff.h" 45 #include "rf_options.h" 46 #include "rf_debugMem.h" 47 #include "rf_general.h" 48 49 #if RF_DEBUG_MEM 50 51 static long tot_mem_in_use = 0; 52 53 /* Hash table of information about memory allocations */ 54 #define RF_MH_TABLESIZE 1000 55 56 struct mh_struct { 57 void *address; 58 int size; 59 int line; 60 char *filen; 61 char allocated; 62 struct mh_struct *next; 63 }; 64 static struct mh_struct *mh_table[RF_MH_TABLESIZE]; 65 RF_DECLARE_MUTEX(rf_debug_mem_mutex) 66 static int mh_table_initialized = 0; 67 68 static void memory_hash_insert(void *addr, int size, int line, char *filen); 69 static int memory_hash_remove(void *addr, int sz); 70 71 void 72 rf_record_malloc(p, size, line, filen) 73 void *p; 74 int size, line; 75 char *filen; 76 { 77 RF_ASSERT(size != 0); 78 79 /* RF_LOCK_MUTEX(rf_debug_mem_mutex); */ 80 memory_hash_insert(p, size, line, filen); 81 tot_mem_in_use += size; 82 /* RF_UNLOCK_MUTEX(rf_debug_mem_mutex); */ 83 if ((long) p == rf_memDebugAddress) { 84 printf("Allocate: debug address allocated from line %d file %s\n", line, filen); 85 } 86 } 87 88 void 89 rf_unrecord_malloc(p, sz) 90 void *p; 91 int sz; 92 { 93 int size; 94 95 /* RF_LOCK_MUTEX(rf_debug_mem_mutex); */ 96 size = memory_hash_remove(p, sz); 97 tot_mem_in_use -= size; 98 /* RF_UNLOCK_MUTEX(rf_debug_mem_mutex); */ 99 if ((long) p == rf_memDebugAddress) { 100 printf("Free: Found debug address\n"); /* this is really only a 101 * flag line for gdb */ 102 } 103 } 104 105 void 106 rf_print_unfreed() 107 { 108 int i, foundone = 0; 109 struct mh_struct *p; 110 111 for (i = 0; i < RF_MH_TABLESIZE; i++) { 112 for (p = mh_table[i]; p; p = p->next) 113 if (p->allocated) { 114 if (!foundone) 115 printf("\n\nThere are unfreed memory locations at program shutdown:\n"); 116 foundone = 1; 117 printf("Addr 0x%lx Size %d line %d file %s\n", 118 (long) p->address, p->size, p->line, p->filen); 119 } 120 } 121 if (tot_mem_in_use) { 122 printf("%ld total bytes in use\n", tot_mem_in_use); 123 } 124 } 125 #endif /* RF_DEBUG_MEM */ 126 127 int 128 rf_ConfigureDebugMem(listp) 129 RF_ShutdownList_t **listp; 130 { 131 #if RF_DEBUG_MEM 132 int i, rc; 133 134 rc = rf_create_managed_mutex(listp, &rf_debug_mem_mutex); 135 if (rc) { 136 rf_print_unable_to_init_mutex( __FILE__, __LINE__, rc); 137 return (rc); 138 } 139 if (rf_memDebug) { 140 for (i = 0; i < RF_MH_TABLESIZE; i++) 141 mh_table[i] = NULL; 142 mh_table_initialized = 1; 143 } 144 #endif 145 return (0); 146 } 147 148 #if RF_DEBUG_MEM 149 150 #define HASHADDR(_a_) ( (((unsigned long) _a_)>>3) % RF_MH_TABLESIZE ) 151 152 static void 153 memory_hash_insert(addr, size, line, filen) 154 void *addr; 155 int size, line; 156 char *filen; 157 { 158 unsigned long bucket = HASHADDR(addr); 159 struct mh_struct *p; 160 161 RF_ASSERT(mh_table_initialized); 162 163 /* search for this address in the hash table */ 164 for (p = mh_table[bucket]; p && (p->address != addr); p = p->next); 165 if (!p) { 166 RF_Malloc(p, sizeof(struct mh_struct), (struct mh_struct *)); 167 RF_ASSERT(p); 168 p->next = mh_table[bucket]; 169 mh_table[bucket] = p; 170 p->address = addr; 171 p->allocated = 0; 172 } 173 if (p->allocated) { 174 printf("ERROR: reallocated address 0x%lx from line %d, file %s without intervening free\n", (long) addr, line, filen); 175 printf(" last allocated from line %d file %s\n", p->line, p->filen); 176 RF_ASSERT(0); 177 } 178 p->size = size; 179 p->line = line; 180 p->filen = filen; 181 p->allocated = 1; 182 } 183 184 static int 185 memory_hash_remove(addr, sz) 186 void *addr; 187 int sz; 188 { 189 unsigned long bucket = HASHADDR(addr); 190 struct mh_struct *p; 191 192 RF_ASSERT(mh_table_initialized); 193 for (p = mh_table[bucket]; p && (p->address != addr); p = p->next); 194 if (!p) { 195 printf("ERROR: freeing never-allocated address 0x%lx\n", (long) addr); 196 RF_PANIC(); 197 } 198 if (!p->allocated) { 199 printf("ERROR: freeing unallocated address 0x%lx. Last allocation line %d file %s\n", (long) addr, p->line, p->filen); 200 RF_PANIC(); 201 } 202 if (sz > 0 && p->size != sz) { /* you can suppress this error by 203 * using a negative value as the size 204 * to free */ 205 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); 206 RF_PANIC(); 207 } 208 p->allocated = 0; 209 return (p->size); 210 } 211 #endif /* RF_DEBUG_MEM */ 212 213 214