#include "lber-int.h"
+#ifdef LDAP_MEMORY_TRACE
+# ifndef LDAP_MEMORY_DEBUG
+# define LDAP_MEMORY_DEBUG 1
+# endif
+#include <stdio.h>
+#endif
+
#if LDAP_MEMORY_DEBUG
/*
* LDAP_MEMORY_DEBUG should only be enabled for the purposes of
*/
struct ber_mem_hdr {
- union bmu_align_u {
+ 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;
double bmu_double;
long bmu_long;
long (*bmu_funcp)( double );
- char bmu_char[4];
+ 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
};
-#define BER_MEM_JUNK 0xdeaddadaU
-static const struct ber_mem_hdr ber_int_mem_hdr = { BER_MEM_JUNK };
+
+/* Pattern at top of allocated space */
+#define LLBER_MEM_JUNK 0xdeaddadaU
+
+static const struct ber_mem_hdr ber_int_mem_hdr = { LBER_MEM_JUNK, 0, 0 };
+
+/* Note sequence and ber_int_options.lbu_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.
+ */
+#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 ); \
#ifdef LDAP_MEMORY_DEBUG
struct ber_mem_hdr *mh = (struct ber_mem_hdr *)
((char *)p - sizeof(struct ber_mem_hdr));
-
- assert( mh->bm_junk == BER_MEM_JUNK );
- mh->bm_junk = ~BER_MEM_JUNK;
+ assert( mh->bm_top == LBER_MEM_JUNK);
+ assert( testdatatop( mh));
+ assert( testend( (char *)&mh[1] + mh->bm_length) );
+ ber_int_options.lbo_meminuse -= mh->bm_length;
+
+#ifdef LDAP_MEMORY_TRACE
+ fprintf(stderr, "0x%08x 0x%08x -f- %d ber_memfree %d\n",
+ mh->bm_sequence, mh, mh->bm_length, ber_int_options.lbo_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 );
if( ber_int_memory_fns == NULL ) {
#ifdef LDAP_MEMORY_DEBUG
- struct ber_mem_hdr *mh = malloc(s + sizeof(struct ber_mem_hdr));
-
+ struct ber_mem_hdr *mh = malloc(s + sizeof(struct ber_mem_hdr) + sizeof( ber_int_t));
if( mh == NULL ) return NULL;
- mh->bm_junk = BER_MEM_JUNK;
+ mh->bm_top = LBER_MEM_JUNK;
+ mh->bm_length = s;
+ setdatatop( mh);
+ setend( (char *)&mh[1] + mh->bm_length );
+
+ ber_int_options.lbo_meminuse += mh->bm_length; /* Count mem inuse */
+
+#ifdef LDAP_MEMORY_TRACE
+ mh->bm_sequence = sequence++;
+ fprintf(stderr, "0x%08x 0x%08x -a- %d ber_memalloc %d\n",
+ mh->bm_sequence, mh, mh->bm_length, ber_int_options.lbo_meminuse);
+#endif
+ /* poison new memory */
+ memset( (char *)&mh[1], 0xff, s);
BER_MEM_VALID( &mh[1] );
new = &mh[1];
if( ber_int_memory_fns == NULL ) {
#ifdef LDAP_MEMORY_DEBUG
struct ber_mem_hdr *mh = calloc(1,
- (n * s) + sizeof(struct ber_mem_hdr) );
+ (n * s) + sizeof(struct ber_mem_hdr) + sizeof(ber_int_t) );
+ if( mh == NULL ) return NULL;
- mh->bm_junk = BER_MEM_JUNK;
+ mh->bm_top = LBER_MEM_JUNK;
+ mh->bm_length = n*s;
+ setdatatop( mh);
+ setend( (char *)&mh[1] + mh->bm_length );
+ ber_int_options.lbo_meminuse += mh->bm_length;
+
+#ifdef LDAP_MEMORY_TRACE
+ mh->bm_sequence = sequence++;
+ fprintf(stderr, "0x%08x 0x%08x -a- %d ber_memcalloc %d\n",
+ mh->bm_sequence, mh, mh->bm_length, ber_int_options.lbo_meminuse);
+#endif
BER_MEM_VALID( &mh[1] );
new = &mh[1];
#else
void *
ber_memrealloc( void* p, ber_len_t s )
{
- void *new;
+ void *new = NULL;
ber_int_options.lbo_valid = LBER_INITIALIZED;
/* realloc(NULL,s) -> malloc(s) */
if( ber_int_memory_fns == 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_junk == BER_MEM_JUNK );
-
- p = realloc( mh, s + 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;
+ }
- if( p != NULL ) {
mh = p;
+ mh->bm_length = s;
+ setend( (char *)&mh[1] + mh->bm_length );
+ if( (s - oldlen) > 0 ) {
+ /* poison any new memory */
+ memset( (char *)&mh[1] + oldlen, 0xff, s - oldlen);
+ }
- assert( mh->bm_junk == BER_MEM_JUNK );
+ assert( mh->bm_top == LBER_MEM_JUNK);
+ assert( testdatatop( mh));
+ ber_int_options.lbo_meminuse += s - oldlen;
+#ifdef LDAP_MEMORY_TRACE
+ fprintf(stderr, "0x%08x 0x%08x -a- %d ber_memrealloc %d\n",
+ mh->bm_sequence, mh, mh->bm_length, ber_int_options.lbo_meminuse);
+#endif
BER_MEM_VALID( &mh[1] );
- new = &mh[1];
- }
+ return &mh[1];
#else
new = realloc( p, s );
#endif
BER_MEM_VALID( bv );
- if ( bv->bv_val != NULL )
+ if ( bv->bv_val != NULL ) {
LBER_FREE( bv->bv_val );
+ }
LBER_FREE( (char *) bv );
}
BER_MEM_VALID( bv );
- for ( i = 0; bv[i] != NULL; i++ )
+ for ( i = 0; bv[i] != NULL; i++ ) {
ber_bvfree( bv[i] );
+ }
LBER_FREE( (char *) bv );
}
ber_int_options.lbo_valid = LBER_INITIALIZED;
- if( bvec == NULL ) {
+ if( *bvec == NULL ) {
if( bv == NULL ) {
/* nothing to add */
return 0;
BER_MEM_VALID( bvec );
/* count entries */
- for ( i = 0; bvec[i] != NULL; i++ ) {
+ for ( i = 0; (*bvec)[i] != NULL; i++ ) {
/* EMPTY */;
}
return NULL;
}
- SAFEMEMCPY( new->bv_val, bv->bv_val, bv->bv_len );
+ AC_MEMCPY( new->bv_val, bv->bv_val, bv->bv_len );
new->bv_val[bv->bv_len] = '\0';
new->bv_len = bv->bv_len;
- return( new );
+ return new;
}
struct berval *
return NULL;
}
- if ( *s == '\0' ) {
- new->bv_val = NULL;
- new->bv_len = 0;
- return new;
- }
-
new->bv_val = (char *) s;
new->bv_len = strlen( s );
LBER_FREE( p );
}
- return( new );
+ return new;
}
char *
if( s == NULL ) {
ber_errno = LBER_ERROR_PARAM;
- return( NULL );
+ return NULL;
}
len = strlen( s ) + 1;
if ( (p = LBER_MALLOC( len )) == NULL ) {
ber_errno = LBER_ERROR_MEMORY;
- return( NULL );
+ return NULL;
+ }
+
+ AC_MEMCPY( p, s, len );
+ return p;
+}
+
+char *
+ber_strndup( LDAP_CONST char *s, ber_len_t l )
+{
+ char *p;
+ size_t len;
+
+ ber_int_options.lbo_valid = LBER_INITIALIZED;
+
+#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 );
+
+ if ( len > l ) {
+ len = l;
+ }
+
+ if ( (p = LBER_MALLOC( len + 1 )) == NULL ) {
+ ber_errno = LBER_ERROR_MEMORY;
+ return NULL;
+ }
+
+ AC_MEMCPY( p, s, len );
+ p[ len ] = '\0';
+ return p;
+}
+
+char *
+ber_strndup__( LDAP_CONST char *s, size_t l )
+{
+ char *p;
+ size_t len;
+
+ if ( s == NULL ) {
+ return NULL;
+ }
+
+ len = strlen( s );
+ if (( p = LBER_MALLOC( len + 1 ) ) == NULL ) {
+ return NULL;
}
- SAFEMEMCPY( p, s, len );
- return( p );
+ AC_MEMCPY( p, s, len );
+ p[ len ] = '\0';
+ return p;
}
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