1 /* $NetBSD: rf_debugMem.c,v 1.21 2011/05/01 06:49:43 mrg 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 1.21 2011/05/01 06:49:43 mrg 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 #include "rf_shutdown.h" 44 45 #if RF_DEBUG_MEM 46 47 static long tot_mem_in_use = 0; 48 49 /* Hash table of information about memory allocations */ 50 #define RF_MH_TABLESIZE 1000 51 52 struct mh_struct { 53 void *address; 54 int size; 55 int line; 56 const char *filen; 57 char allocated; 58 struct mh_struct *next; 59 }; 60 static struct mh_struct *mh_table[RF_MH_TABLESIZE]; 61 static rf_declare_mutex2(rf_debug_mem_mutex); 62 static int mh_table_initialized = 0; 63 64 static void memory_hash_insert(void *addr, int size, int line, const char *filen); 65 static int memory_hash_remove(void *addr, int sz); 66 67 void 68 rf_record_malloc(void *p, int size, int line, const char *filen) 69 { 70 RF_ASSERT(size != 0); 71 72 /* rf_lock_mutex2(rf_debug_mem_mutex); */ 73 memory_hash_insert(p, size, line, filen); 74 tot_mem_in_use += size; 75 /* rf_unlock_mutex2(rf_debug_mem_mutex); */ 76 if ((long) p == rf_memDebugAddress) { 77 printf("Allocate: debug address allocated from line %d file %s\n", line, filen); 78 } 79 } 80 81 void 82 rf_unrecord_malloc(void *p, int sz) 83 { 84 int size; 85 86 /* rf_lock_mutex2(rf_debug_mem_mutex); */ 87 size = memory_hash_remove(p, sz); 88 tot_mem_in_use -= size; 89 /* rf_unlock_mutex2(rf_debug_mem_mutex); */ 90 if ((long) p == rf_memDebugAddress) { 91 printf("Free: Found debug address\n"); /* this is really only a 92 * flag line for gdb */ 93 } 94 } 95 96 void 97 rf_print_unfreed(void) 98 { 99 int i, foundone = 0; 100 struct mh_struct *p; 101 102 for (i = 0; i < RF_MH_TABLESIZE; i++) { 103 for (p = mh_table[i]; p; p = p->next) 104 if (p->allocated) { 105 if (!foundone) 106 printf("\n\nThere are unfreed memory locations at program shutdown:\n"); 107 foundone = 1; 108 printf("Addr 0x%lx Size %d line %d file %s\n", 109 (long) p->address, p->size, p->line, p->filen); 110 } 111 } 112 if (tot_mem_in_use) { 113 printf("%ld total bytes in use\n", tot_mem_in_use); 114 } 115 } 116 #endif /* RF_DEBUG_MEM */ 117 118 #if RF_DEBUG_MEM 119 static void 120 rf_ShutdownDebugMem(void *unused) 121 { 122 rf_destroy_mutex2(rf_debug_mem_mutex); 123 } 124 #endif 125 126 int 127 rf_ConfigureDebugMem(RF_ShutdownList_t **listp) 128 { 129 #if RF_DEBUG_MEM 130 int i; 131 132 rf_init_mutex2(rf_debug_mem_mutex, IPL_VM); 133 if (rf_memDebug) { 134 for (i = 0; i < RF_MH_TABLESIZE; i++) 135 mh_table[i] = NULL; 136 mh_table_initialized = 1; 137 } 138 rf_ShutdownCreate(listp, rf_ShutdownDebugMem, NULL); 139 #endif 140 return (0); 141 } 142 143 #if RF_DEBUG_MEM 144 145 #define HASHADDR(_a_) ( (((unsigned long) _a_)>>3) % RF_MH_TABLESIZE ) 146 147 static void 148 memory_hash_insert(void *addr, int size, int line, const char *filen) 149 { 150 unsigned long bucket = HASHADDR(addr); 151 struct mh_struct *p; 152 153 RF_ASSERT(mh_table_initialized); 154 155 /* search for this address in the hash table */ 156 for (p = mh_table[bucket]; p && (p->address != addr); p = p->next); 157 if (!p) { 158 RF_Malloc(p, sizeof(struct mh_struct), (struct mh_struct *)); 159 RF_ASSERT(p); 160 p->next = mh_table[bucket]; 161 mh_table[bucket] = p; 162 p->address = addr; 163 p->allocated = 0; 164 } 165 if (p->allocated) { 166 printf("ERROR: reallocated address 0x%lx from line %d, file %s without intervening free\n", (long) addr, line, filen); 167 printf(" last allocated from line %d file %s\n", p->line, p->filen); 168 RF_ASSERT(0); 169 } 170 p->size = size; 171 p->line = line; 172 p->filen = filen; 173 p->allocated = 1; 174 } 175 176 static int 177 memory_hash_remove(void *addr, int sz) 178 { 179 unsigned long bucket = HASHADDR(addr); 180 struct mh_struct *p; 181 182 RF_ASSERT(mh_table_initialized); 183 for (p = mh_table[bucket]; p && (p->address != addr); p = p->next); 184 if (!p) { 185 printf("ERROR: freeing never-allocated address 0x%lx\n", (long) addr); 186 RF_PANIC(); 187 } 188 if (!p->allocated) { 189 printf("ERROR: freeing unallocated address 0x%lx. Last allocation line %d file %s\n", (long) addr, p->line, p->filen); 190 RF_PANIC(); 191 } 192 if (sz > 0 && p->size != sz) { /* you can suppress this error by 193 * using a negative value as the size 194 * to free */ 195 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); 196 RF_PANIC(); 197 } 198 p->allocated = 0; 199 return (p->size); 200 } 201 #endif /* RF_DEBUG_MEM */ 202 203 204