rf_debugMem.c revision 1.6
1 /* $NetBSD: rf_debugMem.c,v 1.6 1999/09/04 21:11:21 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 (at) 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 "rf_types.h" 40 41 #include "rf_threadstuff.h" 42 #include "rf_threadid.h" 43 #include "rf_options.h" 44 #include "rf_debugMem.h" 45 #include "rf_general.h" 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 char *filen; 57 char allocated; 58 struct mh_struct *next; 59 }; 60 static struct mh_struct *mh_table[RF_MH_TABLESIZE]; 61 RF_DECLARE_MUTEX(rf_debug_mem_mutex) 62 static int mh_table_initialized = 0; 63 64 static void memory_hash_insert(void *addr, int size, int line, char *filen); 65 static int memory_hash_remove(void *addr, int sz); 66 67 void 68 rf_record_malloc(p, size, line, filen) 69 void *p; 70 int size, line; 71 char *filen; 72 { 73 RF_ASSERT(size != 0); 74 75 /* RF_LOCK_MUTEX(rf_debug_mem_mutex); */ 76 memory_hash_insert(p, size, line, filen); 77 tot_mem_in_use += size; 78 /* RF_UNLOCK_MUTEX(rf_debug_mem_mutex); */ 79 if ((long) p == rf_memDebugAddress) { 80 printf("Allocate: debug address allocated from line %d file %s\n", line, filen); 81 } 82 } 83 84 void 85 rf_unrecord_malloc(p, sz) 86 void *p; 87 int sz; 88 { 89 int size; 90 91 /* RF_LOCK_MUTEX(rf_debug_mem_mutex); */ 92 size = memory_hash_remove(p, sz); 93 tot_mem_in_use -= size; 94 /* RF_UNLOCK_MUTEX(rf_debug_mem_mutex); */ 95 if ((long) p == rf_memDebugAddress) { 96 printf("Free: Found debug address\n"); /* this is really only a 97 * flag line for gdb */ 98 } 99 } 100 101 void 102 rf_print_unfreed() 103 { 104 int i, foundone = 0; 105 struct mh_struct *p; 106 107 for (i = 0; i < RF_MH_TABLESIZE; i++) { 108 for (p = mh_table[i]; p; p = p->next) 109 if (p->allocated) { 110 if (!foundone) 111 printf("\n\nThere are unfreed memory locations at program shutdown:\n"); 112 foundone = 1; 113 printf("Addr 0x%lx Size %d line %d file %s\n", 114 (long) p->address, p->size, p->line, p->filen); 115 } 116 } 117 if (tot_mem_in_use) { 118 printf("%ld total bytes in use\n", tot_mem_in_use); 119 } 120 } 121 122 int 123 rf_ConfigureDebugMem(listp) 124 RF_ShutdownList_t **listp; 125 { 126 int i, rc; 127 128 rc = rf_create_managed_mutex(listp, &rf_debug_mem_mutex); 129 if (rc) { 130 RF_ERRORMSG3("Unable to init mutex file %s line %d rc=%d\n", __FILE__, 131 __LINE__, rc); 132 return (rc); 133 } 134 if (rf_memDebug) { 135 for (i = 0; i < RF_MH_TABLESIZE; i++) 136 mh_table[i] = NULL; 137 mh_table_initialized = 1; 138 } 139 return (0); 140 } 141 #define HASHADDR(_a_) ( (((unsigned long) _a_)>>3) % RF_MH_TABLESIZE ) 142 143 static void 144 memory_hash_insert(addr, size, line, filen) 145 void *addr; 146 int size, line; 147 char *filen; 148 { 149 unsigned long bucket = HASHADDR(addr); 150 struct mh_struct *p; 151 152 RF_ASSERT(mh_table_initialized); 153 154 /* search for this address in the hash table */ 155 for (p = mh_table[bucket]; p && (p->address != addr); p = p->next); 156 if (!p) { 157 RF_Malloc(p, sizeof(struct mh_struct), (struct mh_struct *)); 158 RF_ASSERT(p); 159 p->next = mh_table[bucket]; 160 mh_table[bucket] = p; 161 p->address = addr; 162 p->allocated = 0; 163 } 164 if (p->allocated) { 165 printf("ERROR: reallocated address 0x%lx from line %d, file %s without intervening free\n", (long) addr, line, filen); 166 printf(" last allocated from line %d file %s\n", p->line, p->filen); 167 RF_ASSERT(0); 168 } 169 p->size = size; 170 p->line = line; 171 p->filen = filen; 172 p->allocated = 1; 173 } 174 175 static int 176 memory_hash_remove(addr, sz) 177 void *addr; 178 int sz; 179 { 180 unsigned long bucket = HASHADDR(addr); 181 struct mh_struct *p; 182 183 RF_ASSERT(mh_table_initialized); 184 for (p = mh_table[bucket]; p && (p->address != addr); p = p->next); 185 if (!p) { 186 printf("ERROR: freeing never-allocated address 0x%lx\n", (long) addr); 187 RF_PANIC(); 188 } 189 if (!p->allocated) { 190 printf("ERROR: freeing unallocated address 0x%lx. Last allocation line %d file %s\n", (long) addr, p->line, p->filen); 191 RF_PANIC(); 192 } 193 if (sz > 0 && p->size != sz) { /* you can suppress this error by 194 * using a negative value as the size 195 * to free */ 196 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); 197 RF_PANIC(); 198 } 199 p->allocated = 0; 200 return (p->size); 201 } 202
Indexes created Tue Sep 23 14:10:03 GMT 2025