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Diffstat (limited to 'libraries/liblber/memory.c')
| -rw-r--r-- | libraries/liblber/memory.c | 825 |
1 files changed, 825 insertions, 0 deletions
diff --git a/libraries/liblber/memory.c b/libraries/liblber/memory.c new file mode 100644 index 0000000..c508338 --- /dev/null +++ b/libraries/liblber/memory.c @@ -0,0 +1,825 @@ +/* $OpenLDAP$ */ +/* This work is part of OpenLDAP Software <http://www.openldap.org/>. + * + * Copyright 1998-2022 The OpenLDAP Foundation. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted only as authorized by the OpenLDAP + * Public License. + * + * A copy of this license is available in the file LICENSE in the + * top-level directory of the distribution or, alternatively, at + * <http://www.OpenLDAP.org/license.html>. + */ + +#include "portable.h" + +#include <ac/stdlib.h> +#include <ac/string.h> + +#include "lber-int.h" + +#ifdef LDAP_MEMORY_TRACE +#include <stdio.h> +#endif + +#ifdef LDAP_MEMORY_DEBUG +/* + * LDAP_MEMORY_DEBUG should only be enabled for the purposes of + * debugging memory management within OpenLDAP libraries and slapd. + * + * It should only be enabled by an experienced developer as it causes + * the inclusion of numerous assert()'s, many of which may be triggered + * by a perfectly valid program. If LDAP_MEMORY_DEBUG & 2 is true, + * that includes asserts known to break both slapd and current clients. + * + * The code behind this macro is subject to change as needed to + * support this testing. + */ + +struct ber_mem_hdr { + ber_int_t bm_top; /* Pattern to detect buf overrun from prev buffer */ + ber_int_t bm_length; /* Length of user allocated area */ +#ifdef LDAP_MEMORY_TRACE + ber_int_t bm_sequence; /* Allocation sequence number */ +#endif + union bmu_align_u { /* Force alignment, pattern to detect back clobber */ + ber_len_t bmu_len_t; + ber_tag_t bmu_tag_t; + ber_int_t bmu_int_t; + + size_t bmu_size_t; + void * bmu_voidp; + double bmu_double; + long bmu_long; + long (*bmu_funcp)( double ); + unsigned char bmu_char[4]; + } ber_align; +#define bm_junk ber_align.bmu_len_t +#define bm_data ber_align.bmu_char[1] +#define bm_char ber_align.bmu_char +}; + +/* Pattern at top of allocated space */ +#define LBER_MEM_JUNK ((ber_int_t) 0xdeaddada) + +static const struct ber_mem_hdr ber_int_mem_hdr = { LBER_MEM_JUNK }; + +/* Note sequence and ber_int_meminuse are counters, but are not + * thread safe. If you want to use these values for multithreaded applications, + * you must put mutexes around them, otherwise they will have incorrect values. + * When debugging, if you sort the debug output, the sequence number will + * put allocations/frees together. It is then a simple matter to write a script + * to find any allocations that don't have a buffer free function. + */ +long ber_int_meminuse = 0; +#ifdef LDAP_MEMORY_TRACE +static ber_int_t sequence = 0; +#endif + +/* Pattern placed just before user data */ +static unsigned char toppattern[4] = { 0xde, 0xad, 0xba, 0xde }; +/* Pattern placed just after user data */ +static unsigned char endpattern[4] = { 0xd1, 0xed, 0xde, 0xca }; + +#define mbu_len sizeof(ber_int_mem_hdr.ber_align) + +/* Test if pattern placed just before user data is good */ +#define testdatatop(val) ( \ + *(val->bm_char+mbu_len-4)==toppattern[0] && \ + *(val->bm_char+mbu_len-3)==toppattern[1] && \ + *(val->bm_char+mbu_len-2)==toppattern[2] && \ + *(val->bm_char+mbu_len-1)==toppattern[3] ) + +/* Place pattern just before user data */ +#define setdatatop(val) *(val->bm_char+mbu_len-4)=toppattern[0]; \ + *(val->bm_char+mbu_len-3)=toppattern[1]; \ + *(val->bm_char+mbu_len-2)=toppattern[2]; \ + *(val->bm_char+mbu_len-1)=toppattern[3]; + +/* Test if pattern placed just after user data is good */ +#define testend(val) ( *((unsigned char *)val+0)==endpattern[0] && \ + *((unsigned char *)val+1)==endpattern[1] && \ + *((unsigned char *)val+2)==endpattern[2] && \ + *((unsigned char *)val+3)==endpattern[3] ) + +/* Place pattern just after user data */ +#define setend(val) *((unsigned char *)val+0)=endpattern[0]; \ + *((unsigned char *)val+1)=endpattern[1]; \ + *((unsigned char *)val+2)=endpattern[2]; \ + *((unsigned char *)val+3)=endpattern[3]; + +#define BER_MEM_BADADDR ((void *) &ber_int_mem_hdr.bm_data) +#define BER_MEM_VALID(p) do { \ + assert( (p) != BER_MEM_BADADDR ); \ + assert( (p) != (void *) &ber_int_mem_hdr ); \ + } while(0) + +#else +#define BER_MEM_VALID(p) /* no-op */ +#endif + +BerMemoryFunctions *ber_int_memory_fns = NULL; + +void +ber_memfree_x( void *p, void *ctx ) +{ + if( p == NULL ) { + return; + } + + BER_MEM_VALID( p ); + + if( ber_int_memory_fns == NULL || ctx == NULL ) { +#ifdef LDAP_MEMORY_DEBUG + struct ber_mem_hdr *mh = (struct ber_mem_hdr *) + ((char *)p - sizeof(struct ber_mem_hdr)); + assert( mh->bm_top == LBER_MEM_JUNK); + assert( testdatatop( mh)); + assert( testend( (char *)&mh[1] + mh->bm_length) ); + ber_int_meminuse -= mh->bm_length; + +#ifdef LDAP_MEMORY_TRACE + fprintf(stderr, "0x%08lx 0x%08lx -f- %ld ber_memfree %ld\n", + (long)mh->bm_sequence, (long)mh, (long)mh->bm_length, + ber_int_meminuse); +#endif + /* Fill the free space with poison */ + memset( mh, 0xff, mh->bm_length + sizeof(struct ber_mem_hdr) + sizeof(ber_int_t)); + free( mh ); +#else + free( p ); +#endif + return; + } + + assert( ber_int_memory_fns->bmf_free != 0 ); + + (*ber_int_memory_fns->bmf_free)( p, ctx ); +} + +void +ber_memfree( void *p ) +{ + ber_memfree_x(p, NULL); +} + +void +ber_memvfree_x( void **vec, void *ctx ) +{ + int i; + + if( vec == NULL ) { + return; + } + + BER_MEM_VALID( vec ); + + for ( i = 0; vec[i] != NULL; i++ ) { + ber_memfree_x( vec[i], ctx ); + } + + ber_memfree_x( vec, ctx ); +} + +void +ber_memvfree( void **vec ) +{ + ber_memvfree_x( vec, NULL ); +} + +void * +ber_memalloc_x( ber_len_t s, void *ctx ) +{ + void *new; + + if( s == 0 ) { + LDAP_MEMORY_DEBUG_ASSERT( s != 0 ); + return NULL; + } + + if( ber_int_memory_fns == NULL || ctx == NULL ) { +#ifdef LDAP_MEMORY_DEBUG + new = malloc(s + sizeof(struct ber_mem_hdr) + sizeof( ber_int_t)); + if( new ) + { + struct ber_mem_hdr *mh = new; + mh->bm_top = LBER_MEM_JUNK; + mh->bm_length = s; + setdatatop( mh); + setend( (char *)&mh[1] + mh->bm_length ); + + ber_int_meminuse += mh->bm_length; /* Count mem inuse */ + +#ifdef LDAP_MEMORY_TRACE + mh->bm_sequence = sequence++; + fprintf(stderr, "0x%08lx 0x%08lx -a- %ld ber_memalloc %ld\n", + (long)mh->bm_sequence, (long)mh, (long)mh->bm_length, + ber_int_meminuse); +#endif + /* poison new memory */ + memset( (char *)&mh[1], 0xff, s); + + BER_MEM_VALID( &mh[1] ); + new = &mh[1]; + } +#else + new = malloc( s ); +#endif + } else { + new = (*ber_int_memory_fns->bmf_malloc)( s, ctx ); + } + + if( new == NULL ) { + ber_errno = LBER_ERROR_MEMORY; + } + + return new; +} + +void * +ber_memalloc( ber_len_t s ) +{ + return ber_memalloc_x( s, NULL ); +} + +void * +ber_memcalloc_x( ber_len_t n, ber_len_t s, void *ctx ) +{ + void *new; + + if( n == 0 || s == 0 ) { + LDAP_MEMORY_DEBUG_ASSERT( n != 0 && s != 0); + return NULL; + } + + if( ber_int_memory_fns == NULL || ctx == NULL ) { +#ifdef LDAP_MEMORY_DEBUG + new = n < (-sizeof(struct ber_mem_hdr) - sizeof(ber_int_t)) / s + ? calloc(1, n*s + sizeof(struct ber_mem_hdr) + sizeof(ber_int_t)) + : NULL; + if( new ) + { + struct ber_mem_hdr *mh = new; + + mh->bm_top = LBER_MEM_JUNK; + mh->bm_length = n*s; + setdatatop( mh); + setend( (char *)&mh[1] + mh->bm_length ); + + ber_int_meminuse += mh->bm_length; + +#ifdef LDAP_MEMORY_TRACE + mh->bm_sequence = sequence++; + fprintf(stderr, "0x%08lx 0x%08lx -a- %ld ber_memcalloc %ld\n", + (long)mh->bm_sequence, (long)mh, (long)mh->bm_length, + ber_int_meminuse); +#endif + BER_MEM_VALID( &mh[1] ); + new = &mh[1]; + } +#else + new = calloc( n, s ); +#endif + + } else { + new = (*ber_int_memory_fns->bmf_calloc)( n, s, ctx ); + } + + if( new == NULL ) { + ber_errno = LBER_ERROR_MEMORY; + } + + return new; +} + +void * +ber_memcalloc( ber_len_t n, ber_len_t s ) +{ + return ber_memcalloc_x( n, s, NULL ); +} + +void * +ber_memrealloc_x( void* p, ber_len_t s, void *ctx ) +{ + void *new = NULL; + + /* realloc(NULL,s) -> malloc(s) */ + if( p == NULL ) { + return ber_memalloc_x( s, ctx ); + } + + /* realloc(p,0) -> free(p) */ + if( s == 0 ) { + ber_memfree_x( p, ctx ); + return NULL; + } + + BER_MEM_VALID( p ); + + if( ber_int_memory_fns == NULL || ctx == NULL ) { +#ifdef LDAP_MEMORY_DEBUG + ber_int_t oldlen; + struct ber_mem_hdr *mh = (struct ber_mem_hdr *) + ((char *)p - sizeof(struct ber_mem_hdr)); + assert( mh->bm_top == LBER_MEM_JUNK); + assert( testdatatop( mh)); + assert( testend( (char *)&mh[1] + mh->bm_length) ); + oldlen = mh->bm_length; + + p = realloc( mh, s + sizeof(struct ber_mem_hdr) + sizeof(ber_int_t) ); + if( p == NULL ) { + ber_errno = LBER_ERROR_MEMORY; + return NULL; + } + + mh = p; + mh->bm_length = s; + setend( (char *)&mh[1] + mh->bm_length ); + if( s > oldlen ) { + /* poison any new memory */ + memset( (char *)&mh[1] + oldlen, 0xff, s - oldlen); + } + + assert( mh->bm_top == LBER_MEM_JUNK); + assert( testdatatop( mh)); + + ber_int_meminuse += s - oldlen; +#ifdef LDAP_MEMORY_TRACE + fprintf(stderr, "0x%08lx 0x%08lx -a- %ld ber_memrealloc %ld\n", + (long)mh->bm_sequence, (long)mh, (long)mh->bm_length, + ber_int_meminuse); +#endif + BER_MEM_VALID( &mh[1] ); + return &mh[1]; +#else + new = realloc( p, s ); +#endif + } else { + new = (*ber_int_memory_fns->bmf_realloc)( p, s, ctx ); + } + + if( new == NULL ) { + ber_errno = LBER_ERROR_MEMORY; + } + + return new; +} + +void * +ber_memrealloc( void* p, ber_len_t s ) +{ + return ber_memrealloc_x( p, s, NULL ); +} + +void +ber_bvfree_x( struct berval *bv, void *ctx ) +{ + if( bv == NULL ) { + return; + } + + BER_MEM_VALID( bv ); + + if ( bv->bv_val != NULL ) { + ber_memfree_x( bv->bv_val, ctx ); + } + + ber_memfree_x( (char *) bv, ctx ); +} + +void +ber_bvfree( struct berval *bv ) +{ + ber_bvfree_x( bv, NULL ); +} + +void +ber_bvecfree_x( struct berval **bv, void *ctx ) +{ + int i; + + if( bv == NULL ) { + return; + } + + BER_MEM_VALID( bv ); + + /* count elements */ + for ( i = 0; bv[i] != NULL; i++ ) ; + + /* free in reverse order */ + for ( i--; i >= 0; i-- ) { + ber_bvfree_x( bv[i], ctx ); + } + + ber_memfree_x( (char *) bv, ctx ); +} + +void +ber_bvecfree( struct berval **bv ) +{ + ber_bvecfree_x( bv, NULL ); +} + +int +ber_bvecadd_x( struct berval ***bvec, struct berval *bv, void *ctx ) +{ + ber_len_t i; + struct berval **new; + + if( *bvec == NULL ) { + if( bv == NULL ) { + /* nothing to add */ + return 0; + } + + *bvec = ber_memalloc_x( 2 * sizeof(struct berval *), ctx ); + + if( *bvec == NULL ) { + return -1; + } + + (*bvec)[0] = bv; + (*bvec)[1] = NULL; + + return 1; + } + + BER_MEM_VALID( bvec ); + + /* count entries */ + for ( i = 0; (*bvec)[i] != NULL; i++ ) { + /* EMPTY */; + } + + if( bv == NULL ) { + return i; + } + + new = ber_memrealloc_x( *bvec, (i+2) * sizeof(struct berval *), ctx); + + if( new == NULL ) { + return -1; + } + + *bvec = new; + + (*bvec)[i++] = bv; + (*bvec)[i] = NULL; + + return i; +} + +int +ber_bvecadd( struct berval ***bvec, struct berval *bv ) +{ + return ber_bvecadd_x( bvec, bv, NULL ); +} + +struct berval * +ber_dupbv_x( + struct berval *dst, struct berval *src, void *ctx ) +{ + struct berval *new, tmp; + + if( src == NULL ) { + ber_errno = LBER_ERROR_PARAM; + return NULL; + } + + if ( dst ) { + new = &tmp; + } else { + if(( new = ber_memalloc_x( sizeof(struct berval), ctx )) == NULL ) { + return NULL; + } + } + + if ( src->bv_val == NULL ) { + new->bv_val = NULL; + new->bv_len = 0; + } else { + + if(( new->bv_val = ber_memalloc_x( src->bv_len + 1, ctx )) == NULL ) { + if ( !dst ) + ber_memfree_x( new, ctx ); + return NULL; + } + + AC_MEMCPY( new->bv_val, src->bv_val, src->bv_len ); + new->bv_val[src->bv_len] = '\0'; + new->bv_len = src->bv_len; + } + + if ( dst ) { + *dst = *new; + new = dst; + } + + return new; +} + +struct berval * +ber_dupbv( + struct berval *dst, struct berval *src ) +{ + return ber_dupbv_x( dst, src, NULL ); +} + +struct berval * +ber_bvdup( + struct berval *src ) +{ + return ber_dupbv_x( NULL, src, NULL ); +} + +struct berval * +ber_str2bv_x( + LDAP_CONST char *s, ber_len_t len, int dup, struct berval *bv, + void *ctx) +{ + struct berval *new; + + if( s == NULL ) { + ber_errno = LBER_ERROR_PARAM; + return NULL; + } + + if( bv ) { + new = bv; + } else { + if(( new = ber_memalloc_x( sizeof(struct berval), ctx )) == NULL ) { + return NULL; + } + } + + new->bv_len = len ? len : strlen( s ); + if ( dup ) { + if ( (new->bv_val = ber_memalloc_x( new->bv_len+1, ctx )) == NULL ) { + if ( !bv ) + ber_memfree_x( new, ctx ); + return NULL; + } + + AC_MEMCPY( new->bv_val, s, new->bv_len ); + new->bv_val[new->bv_len] = '\0'; + } else { + new->bv_val = (char *) s; + } + + return( new ); +} + +struct berval * +ber_str2bv( + LDAP_CONST char *s, ber_len_t len, int dup, struct berval *bv) +{ + return ber_str2bv_x( s, len, dup, bv, NULL ); +} + +struct berval * +ber_mem2bv_x( + LDAP_CONST char *s, ber_len_t len, int dup, struct berval *bv, + void *ctx) +{ + struct berval *new; + + if( s == NULL ) { + ber_errno = LBER_ERROR_PARAM; + return NULL; + } + + if( bv ) { + new = bv; + } else { + if(( new = ber_memalloc_x( sizeof(struct berval), ctx )) == NULL ) { + return NULL; + } + } + + new->bv_len = len; + if ( dup ) { + if ( (new->bv_val = ber_memalloc_x( new->bv_len+1, ctx )) == NULL ) { + if ( !bv ) { + ber_memfree_x( new, ctx ); + } + return NULL; + } + + AC_MEMCPY( new->bv_val, s, new->bv_len ); + new->bv_val[new->bv_len] = '\0'; + } else { + new->bv_val = (char *) s; + } + + return( new ); +} + +struct berval * +ber_mem2bv( + LDAP_CONST char *s, ber_len_t len, int dup, struct berval *bv) +{ + return ber_mem2bv_x( s, len, dup, bv, NULL ); +} + +char * +ber_strdup_x( LDAP_CONST char *s, void *ctx ) +{ + char *p; + size_t len; + +#ifdef LDAP_MEMORY_DEBUG + assert(s != NULL); /* bv damn better point to something */ +#endif + + if( s == NULL ) { + ber_errno = LBER_ERROR_PARAM; + return NULL; + } + + len = strlen( s ) + 1; + if ( (p = ber_memalloc_x( len, ctx )) != NULL ) { + AC_MEMCPY( p, s, len ); + } + + return p; +} + +char * +ber_strdup( LDAP_CONST char *s ) +{ + return ber_strdup_x( s, NULL ); +} + +ber_len_t +ber_strnlen( LDAP_CONST char *s, ber_len_t len ) +{ + ber_len_t l; + + for ( l = 0; l < len && s[l] != '\0'; l++ ) ; + + return l; +} + +char * +ber_strndup_x( LDAP_CONST char *s, ber_len_t l, void *ctx ) +{ + char *p; + size_t len; + +#ifdef LDAP_MEMORY_DEBUG + assert(s != NULL); /* bv damn better point to something */ +#endif + + if( s == NULL ) { + ber_errno = LBER_ERROR_PARAM; + return NULL; + } + + len = ber_strnlen( s, l ); + if ( (p = ber_memalloc_x( len + 1, ctx )) != NULL ) { + AC_MEMCPY( p, s, len ); + p[len] = '\0'; + } + + return p; +} + +char * +ber_strndup( LDAP_CONST char *s, ber_len_t l ) +{ + return ber_strndup_x( s, l, NULL ); +} + +/* + * dst is resized as required by src and the value of src is copied into dst + * dst->bv_val must be NULL (and dst->bv_len must be 0), or it must be + * alloc'ed with the context ctx + */ +struct berval * +ber_bvreplace_x( struct berval *dst, LDAP_CONST struct berval *src, void *ctx ) +{ + assert( dst != NULL ); + assert( !BER_BVISNULL( src ) ); + + if ( BER_BVISNULL( dst ) || dst->bv_len < src->bv_len ) { + dst->bv_val = ber_memrealloc_x( dst->bv_val, src->bv_len + 1, ctx ); + } + + AC_MEMCPY( dst->bv_val, src->bv_val, src->bv_len + 1 ); + dst->bv_len = src->bv_len; + + return dst; +} + +struct berval * +ber_bvreplace( struct berval *dst, LDAP_CONST struct berval *src ) +{ + return ber_bvreplace_x( dst, src, NULL ); +} + +void +ber_bvarray_free_x( BerVarray a, void *ctx ) +{ + int i; + + if (a) { + BER_MEM_VALID( a ); + + /* count elements */ + for (i=0; a[i].bv_val; i++) ; + + /* free in reverse order */ + for (i--; i>=0; i--) { + ber_memfree_x(a[i].bv_val, ctx); + } + + ber_memfree_x(a, ctx); + } +} + +void +ber_bvarray_free( BerVarray a ) +{ + ber_bvarray_free_x(a, NULL); +} + +int +ber_bvarray_dup_x( BerVarray *dst, BerVarray src, void *ctx ) +{ + int i, j; + BerVarray new; + + if ( !src ) { + *dst = NULL; + return 0; + } + + for (i=0; !BER_BVISNULL( &src[i] ); i++) ; + new = ber_memalloc_x(( i+1 ) * sizeof(BerValue), ctx ); + if ( !new ) + return -1; + for (j=0; j<i; j++) { + ber_dupbv_x( &new[j], &src[j], ctx ); + if ( BER_BVISNULL( &new[j] )) { + ber_bvarray_free_x( new, ctx ); + return -1; + } + } + BER_BVZERO( &new[j] ); + *dst = new; + return 0; +} + +int +ber_bvarray_add_x( BerVarray *a, BerValue *bv, void *ctx ) +{ + int n; + + if ( *a == NULL ) { + if (bv == NULL) { + return 0; + } + n = 0; + + *a = (BerValue *) ber_memalloc_x( 2 * sizeof(BerValue), ctx ); + if ( *a == NULL ) { + return -1; + } + + } else { + BerVarray atmp; + BER_MEM_VALID( a ); + + for ( n = 0; *a != NULL && (*a)[n].bv_val != NULL; n++ ) { + ; /* just count them */ + } + + if (bv == NULL) { + return n; + } + + atmp = (BerValue *) ber_memrealloc_x( (char *) *a, + (n + 2) * sizeof(BerValue), ctx ); + + if( atmp == NULL ) { + return -1; + } + + *a = atmp; + } + + (*a)[n++] = *bv; + (*a)[n].bv_val = NULL; + (*a)[n].bv_len = 0; + + return n; +} + +int +ber_bvarray_add( BerVarray *a, BerValue *bv ) +{ + return ber_bvarray_add_x( a, bv, NULL ); +} |