emalloc.c revision 285612
1/* 2 * emalloc - return new memory obtained from the system. Belch if none. 3 */ 4#include <config.h> 5#include "ntp_types.h" 6#include "ntp_malloc.h" 7#include "ntp_syslog.h" 8#include "ntp_stdlib.h" 9 10 11/* 12 * When using the debug MS CRT allocator, each allocation stores the 13 * callsite __FILE__ and __LINE__, which is then displayed at process 14 * termination, to track down leaks. We don't want all of our 15 * allocations to show up as coming from emalloc.c, so we preserve the 16 * original callsite's source file and line using macros which pass 17 * __FILE__ and __LINE__ as parameters to these routines. 18 * Other debug malloc implementations can be used by defining 19 * EREALLOC_IMPL() as ports/winnt/include/config.h does. 20 */ 21 22void * 23ereallocz( 24 void * ptr, 25 size_t newsz, 26 size_t priorsz, 27 int zero_init 28#ifdef EREALLOC_CALLSITE /* ntp_malloc.h */ 29 , 30 const char * file, 31 int line 32#endif 33 ) 34{ 35 char * mem; 36 size_t allocsz; 37 38 if (0 == newsz) 39 allocsz = 1; 40 else 41 allocsz = newsz; 42 43 mem = EREALLOC_IMPL(ptr, allocsz, file, line); 44 if (NULL == mem) { 45 msyslog_term = TRUE; 46#ifndef EREALLOC_CALLSITE 47 msyslog(LOG_ERR, "fatal out of memory (%lu bytes)", 48 (u_long)newsz); 49#else 50 msyslog(LOG_ERR, 51 "fatal out of memory %s line %d (%lu bytes)", 52 file, line, (u_long)newsz); 53#endif 54 exit(1); 55 } 56 57 if (zero_init && newsz > priorsz) 58 zero_mem(mem + priorsz, newsz - priorsz); 59 60 return mem; 61} 62 63/* oreallocarray.c is licensed under the following: 64 * Copyright (c) 2008 Otto Moerbeek <otto@drijf.net> 65 * 66 * Permission to use, copy, modify, and distribute this software for any 67 * purpose with or without fee is hereby granted, provided that the above 68 * copyright notice and this permission notice appear in all copies. 69 * 70 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 71 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 72 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 73 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 74 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 75 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 76 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 77 */ 78 79#include <stdint.h> 80 81/* 82 * This is sqrt(SIZE_MAX+1), as s1*s2 <= SIZE_MAX 83 * if both s1 < MUL_NO_OVERFLOW and s2 < MUL_NO_OVERFLOW 84 */ 85#define MUL_NO_OVERFLOW ((size_t)1 << (sizeof(size_t) * 4)) 86 87void * 88oreallocarray( 89 void *optr, 90 size_t nmemb, 91 size_t size 92#ifdef EREALLOC_CALLSITE /* ntp_malloc.h */ 93 , 94 const char * file, 95 int line 96#endif 97 ) 98{ 99 if ((nmemb >= MUL_NO_OVERFLOW || size >= MUL_NO_OVERFLOW) && 100 nmemb > 0 && SIZE_MAX / nmemb < size) { 101#ifndef EREALLOC_CALLSITE 102 msyslog(LOG_ERR, "fatal allocation size overflow"); 103#else 104 msyslog(LOG_ERR, 105 "fatal allocation size overflow %s line %d", 106 file, line); 107#endif 108 exit(1); 109 } 110#ifndef EREALLOC_CALLSITE 111 return ereallocz(optr, (size * nmemb), 0, FALSE); 112#else 113 return ereallocz(optr, (size * nmemb), 0, FALSE, file, line); 114#endif 115} 116 117char * 118estrdup_impl( 119 const char * str 120#ifdef EREALLOC_CALLSITE 121 , 122 const char * file, 123 int line 124#endif 125 ) 126{ 127 char * copy; 128 size_t bytes; 129 130 bytes = strlen(str) + 1; 131 copy = ereallocz(NULL, bytes, 0, FALSE 132#ifdef EREALLOC_CALLSITE 133 , file, line 134#endif 135 ); 136 memcpy(copy, str, bytes); 137 138 return copy; 139} 140 141 142#if 0 143#ifndef EREALLOC_CALLSITE 144void * 145emalloc(size_t newsz) 146{ 147 return ereallocz(NULL, newsz, 0, FALSE); 148} 149#endif 150#endif 151 152