/src/openssl/crypto/mem.c

Source
/*
 * Copyright 1995-2025 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the Apache License 2.0 (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */

#include "internal/e_os.h"
#include "internal/cryptlib.h"
#include "internal/mem_alloc_utils.h"
#include "crypto/cryptlib.h"
#include <stdio.h>
#include <stdlib.h>
#include <limits.h>
#include <openssl/crypto.h>

/*
 * the following pointers may be changed as long as 'allow_customize' is set
 */
static int allow_customize = 1;
static CRYPTO_malloc_fn malloc_impl = CRYPTO_malloc;
static CRYPTO_realloc_fn realloc_impl = CRYPTO_realloc;
static CRYPTO_free_fn free_impl = CRYPTO_free;

#if !defined(OPENSSL_NO_CRYPTO_MDEBUG) && !defined(FIPS_MODULE)
# include "internal/tsan_assist.h"

# ifdef TSAN_REQUIRES_LOCKING
#  define INCREMENT(x) /* empty */
#  define LOAD(x) 0
# else  /* TSAN_REQUIRES_LOCKING */
static TSAN_QUALIFIER int malloc_count;
static TSAN_QUALIFIER int realloc_count;
static TSAN_QUALIFIER int free_count;

#  define INCREMENT(x) tsan_counter(&(x))
#  define LOAD(x)      tsan_load(&x)
# endif /* TSAN_REQUIRES_LOCKING */

static char md_failbuf[CRYPTO_MEM_CHECK_MAX_FS + 1];
static char *md_failstring = NULL;
static long md_count;
static int md_fail_percent = 0;
static int md_tracefd = -1;

static void parseit(void);
static int shouldfail(void);

# define FAILTEST() if (shouldfail()) return NULL

#else

# define INCREMENT(x) /* empty */
# define FAILTEST() /* empty */
#endif

int CRYPTO_set_mem_functions(CRYPTO_malloc_fn malloc_fn,
                             CRYPTO_realloc_fn realloc_fn,
                             CRYPTO_free_fn free_fn)
{
    if (!allow_customize)
        return 0;
    if (malloc_fn != NULL)
        malloc_impl = malloc_fn;
    if (realloc_fn != NULL)
        realloc_impl = realloc_fn;
    if (free_fn != NULL)
        free_impl = free_fn;
    return 1;
}

void CRYPTO_get_mem_functions(CRYPTO_malloc_fn *malloc_fn,
                              CRYPTO_realloc_fn *realloc_fn,
                              CRYPTO_free_fn *free_fn)
{
    if (malloc_fn != NULL)
        *malloc_fn = malloc_impl;
    if (realloc_fn != NULL)
        *realloc_fn = realloc_impl;
    if (free_fn != NULL)
        *free_fn = free_impl;
}

#if !defined(OPENSSL_NO_CRYPTO_MDEBUG) && !defined(FIPS_MODULE)
void CRYPTO_get_alloc_counts(int *mcount, int *rcount, int *fcount)
{
    if (mcount != NULL)
        *mcount = LOAD(malloc_count);
    if (rcount != NULL)
        *rcount = LOAD(realloc_count);
    if (fcount != NULL)
        *fcount = LOAD(free_count);
}

/*
 * Parse a "malloc failure spec" string.  This likes like a set of fields
 * separated by semicolons.  Each field has a count and an optional failure
 * percentage.  For example:
 *          100@0;100@25;0@0
 *    or    100;100@25;0
 * This means 100 mallocs succeed, then next 100 fail 25% of the time, and
 * all remaining (count is zero) succeed.
 * The failure percentge can have 2 digits after the comma.  For example:
 *          0@0.01
 * This means 0.01% of all allocations will fail.
 */
static void parseit(void)
{
    char *semi = strchr(md_failstring, ';');
    char *atsign;

    if (semi != NULL)
        *semi++ = '\0';

    /* Get the count (atol will stop at the @ if there), and percentage */
    md_count = atol(md_failstring);
    atsign = strchr(md_failstring, '@');
    md_fail_percent = atsign == NULL ? 0 : (int)(atof(atsign + 1) * 100 + 0.5);

    if (semi != NULL)
        md_failstring = semi;
}

/*
 * Windows doesn't have random() and srandom(), but it has rand() and srand().
 * Some rand() implementations aren't good, but we're not
 * dealing with secure randomness here.
 */
# ifdef _WIN32
#  define random() rand()
#  define srandom(seed) srand(seed)
# endif
/*
 * See if the current malloc should fail.
 */
static int shouldfail(void)
{
    int roll = (int)(random() % 10000);
    int shoulditfail = roll < md_fail_percent;
# ifndef _WIN32
/* suppressed on Windows as POSIX-like file descriptors are non-inheritable */
    int len;
    char buff[80];

    if (md_tracefd > 0) {
        BIO_snprintf(buff, sizeof(buff),
                     "%c C%ld %%%d R%d\n",
                     shoulditfail ? '-' : '+', md_count, md_fail_percent, roll);
        len = strlen(buff);
        if (write(md_tracefd, buff, len) != len)
            perror("shouldfail write failed");
    }
# endif

    if (md_count) {
        /* If we used up this one, go to the next. */
        if (--md_count == 0)
            parseit();
    }

    return shoulditfail;
}

void ossl_malloc_setup_failures(void)
{
    const char *cp = getenv("OPENSSL_MALLOC_FAILURES");
    size_t cplen = 0;

    if (cp != NULL) {
        /* if the value is too long we'll just ignore it */
        cplen = strlen(cp);
        if (cplen <= CRYPTO_MEM_CHECK_MAX_FS) {
            strncpy(md_failbuf, cp, CRYPTO_MEM_CHECK_MAX_FS);
            md_failstring = md_failbuf;
            parseit();
        }
    }
    if ((cp = getenv("OPENSSL_MALLOC_FD")) != NULL)
        md_tracefd = atoi(cp);
    if ((cp = getenv("OPENSSL_MALLOC_SEED")) != NULL)
        srandom(atoi(cp));
}
#endif

void *CRYPTO_malloc(size_t num, const char *file, int line)
{
    void *ptr;

    INCREMENT(malloc_count);
    if (malloc_impl != CRYPTO_malloc) {
        ptr = malloc_impl(num, file, line);
        if (ptr != NULL || num == 0)
            return ptr;
        goto err;
    }

    if (ossl_unlikely(num == 0))
        return NULL;

    FAILTEST();
    if (allow_customize) {
        /*
         * Disallow customization after the first allocation. We only set this
         * if necessary to avoid a store to the same cache line on every
         * allocation.
         */
        allow_customize = 0;
    }

    ptr = malloc(num);
    if (ossl_likely(ptr != NULL))
        return ptr;
 err:
    ossl_report_alloc_err(file, line);
    return NULL;
}

void *CRYPTO_zalloc(size_t num, const char *file, int line)
{
    void *ret;

    ret = CRYPTO_malloc(num, file, line);
    if (ret != NULL)
        memset(ret, 0, num);

    return ret;
}

void *CRYPTO_aligned_alloc(size_t num, size_t alignment, void **freeptr,
                           const char *file, int line)
{
    *freeptr = NULL;

    /* Ensure that alignment is a power of two no larger than 65536 */
    if (alignment == 0 || (alignment & (alignment - 1)) != 0
        || alignment > 65536) {
        ossl_report_alloc_err_inv(file, line);
        return NULL;
    }

    /* Allow non-malloc() allocations as long as no malloc_impl is provided. */
    if (malloc_impl == CRYPTO_malloc) {
#if defined(_BSD_SOURCE) || (defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 200112L)
        void *ret;

        /* posix_memalign() requires alignment to be at least sizeof(void *) */
        if (alignment < sizeof(void *))
            alignment = sizeof(void *);

        if (posix_memalign(&ret, alignment, num) == 0) {
            *freeptr = ret;
            return ret;
        }
#endif
    }

    return ossl_malloc_align(num, alignment, freeptr, file, line);
}

void *CRYPTO_realloc(void *str, size_t num, const char *file, int line)
{
    void *ret;

    INCREMENT(realloc_count);
    if (realloc_impl != CRYPTO_realloc) {
        ret = realloc_impl(str, num, file, line);

        if (num == 0 || ret != NULL)
            return ret;

        goto err;
    }

    if (str == NULL)
        return CRYPTO_malloc(num, file, line);

    if (num == 0) {
        CRYPTO_free(str, file, line);
        return NULL;
    }

    FAILTEST();
    ret = realloc(str, num);

err:
    if (num != 0 && ret == NULL)
        ossl_report_alloc_err(file, line);

    return ret;
}

void *CRYPTO_clear_realloc(void *str, size_t old_len, size_t num,
                           const char *file, int line)
{
    void *ret = NULL;

    if (str == NULL)
        return CRYPTO_malloc(num, file, line);

    if (num == 0) {
        CRYPTO_clear_free(str, old_len, file, line);
        return NULL;
    }

    /* Can't shrink the buffer since memcpy below copies |old_len| bytes. */
    if (num < old_len) {
        OPENSSL_cleanse((char*)str + num, old_len - num);
        return str;
    }

    ret = CRYPTO_malloc(num, file, line);
    if (ret != NULL) {
        memcpy(ret, str, old_len);
        CRYPTO_clear_free(str, old_len, file, line);
    }
    return ret;
}

void CRYPTO_free(void *str, const char *file, int line)
{
    INCREMENT(free_count);
    if (free_impl != CRYPTO_free) {
        free_impl(str, file, line);
        return;
    }

    free(str);
}

void CRYPTO_clear_free(void *str, size_t num, const char *file, int line)
{
    if (str == NULL)
        return;
    if (num)
        OPENSSL_cleanse(str, num);
    CRYPTO_free(str, file, line);
}

#if !defined(OPENSSL_NO_CRYPTO_MDEBUG)

# ifndef OPENSSL_NO_DEPRECATED_3_0
int CRYPTO_mem_ctrl(int mode)
{
    (void)mode;
    return -1;
}

int CRYPTO_set_mem_debug(int flag)
{
    (void)flag;
    return -1;
}

int CRYPTO_mem_debug_push(const char *info, const char *file, int line)
{
    (void)info; (void)file; (void)line;
    return 0;
}

int CRYPTO_mem_debug_pop(void)
{
    return 0;
}

void CRYPTO_mem_debug_malloc(void *addr, size_t num, int flag,
                             const char *file, int line)
{
    (void)addr; (void)num; (void)flag; (void)file; (void)line;
}

void CRYPTO_mem_debug_realloc(void *addr1, void *addr2, size_t num, int flag,
                              const char *file, int line)
{
    (void)addr1; (void)addr2; (void)num; (void)flag; (void)file; (void)line;
}

void CRYPTO_mem_debug_free(void *addr, int flag,
                           const char *file, int line)
{
    (void)addr; (void)flag; (void)file; (void)line;
}

int CRYPTO_mem_leaks(BIO *b)
{
    (void)b;
    return -1;
}

#  ifndef OPENSSL_NO_STDIO
int CRYPTO_mem_leaks_fp(FILE *fp)
{
    (void)fp;
    return -1;
}
#  endif

int CRYPTO_mem_leaks_cb(int (*cb)(const char *str, size_t len, void *u),
                        void *u)
{
    (void)cb; (void)u;
    return -1;
}

# endif

#endif

Coverage Report

Created: 2025-10-10 07:01

Line	Count	Source
1		/*
2		* Copyright 1995-2025 The OpenSSL Project Authors. All Rights Reserved.
3		*
4		* Licensed under the Apache License 2.0 (the "License"). You may not use
5		* this file except in compliance with the License. You can obtain a copy
6		* in the file LICENSE in the source distribution or at
7		* https://www.openssl.org/source/license.html
8		*/
9
10		#include "internal/e_os.h"
11		#include "internal/cryptlib.h"
12		#include "internal/mem_alloc_utils.h"
13		#include "crypto/cryptlib.h"
14		#include <stdio.h>
15		#include <stdlib.h>
16		#include <limits.h>
17		#include <openssl/crypto.h>
18
19		/*
20		* the following pointers may be changed as long as 'allow_customize' is set
21		*/
22		static int allow_customize = 1;
23		static CRYPTO_malloc_fn malloc_impl = CRYPTO_malloc;
24		static CRYPTO_realloc_fn realloc_impl = CRYPTO_realloc;
25		static CRYPTO_free_fn free_impl = CRYPTO_free;
26
27		#if !defined(OPENSSL_NO_CRYPTO_MDEBUG) && !defined(FIPS_MODULE)
28		# include "internal/tsan_assist.h"
29
30		# ifdef TSAN_REQUIRES_LOCKING
31		# define INCREMENT(x) /* empty */
32		# define LOAD(x) 0
33		# else /* TSAN_REQUIRES_LOCKING */
34		static TSAN_QUALIFIER int malloc_count;
35		static TSAN_QUALIFIER int realloc_count;
36		static TSAN_QUALIFIER int free_count;
37
38		# define INCREMENT(x) tsan_counter(&(x))
39		# define LOAD(x) tsan_load(&x)
40		# endif /* TSAN_REQUIRES_LOCKING */
41
42		static char md_failbuf[CRYPTO_MEM_CHECK_MAX_FS + 1];
43		static char *md_failstring = NULL;
44		static long md_count;
45		static int md_fail_percent = 0;
46		static int md_tracefd = -1;
47
48		static void parseit(void);
49		static int shouldfail(void);
50
51		# define FAILTEST() if (shouldfail()) return NULL
52
53		#else
54
55		# define INCREMENT(x) /* empty */
56		# define FAILTEST() /* empty */
57		#endif
58
59		int CRYPTO_set_mem_functions(CRYPTO_malloc_fn malloc_fn,
60		CRYPTO_realloc_fn realloc_fn,
61		CRYPTO_free_fn free_fn)
62	0	{
63	0	if (!allow_customize)
64	0	return 0;
65	0	if (malloc_fn != NULL)
66	0	malloc_impl = malloc_fn;
67	0	if (realloc_fn != NULL)
68	0	realloc_impl = realloc_fn;
69	0	if (free_fn != NULL)
70	0	free_impl = free_fn;
71	0	return 1;
72	0	}
73
74		void CRYPTO_get_mem_functions(CRYPTO_malloc_fn *malloc_fn,
75		CRYPTO_realloc_fn *realloc_fn,
76		CRYPTO_free_fn *free_fn)
77	0	{
78	0	if (malloc_fn != NULL)
79	0	*malloc_fn = malloc_impl;
80	0	if (realloc_fn != NULL)
81	0	*realloc_fn = realloc_impl;
82	0	if (free_fn != NULL)
83	0	*free_fn = free_impl;
84	0	}
85
86		#if !defined(OPENSSL_NO_CRYPTO_MDEBUG) && !defined(FIPS_MODULE)
87		void CRYPTO_get_alloc_counts(int mcount, int rcount, int *fcount)
88		{
89		if (mcount != NULL)
90		*mcount = LOAD(malloc_count);
91		if (rcount != NULL)
92		*rcount = LOAD(realloc_count);
93		if (fcount != NULL)
94		*fcount = LOAD(free_count);
95		}
96
97		/*
98		* Parse a "malloc failure spec" string. This likes like a set of fields
99		* separated by semicolons. Each field has a count and an optional failure
100		* percentage. For example:
101		* 100@0;100@25;0@0
102		* or 100;100@25;0
103		* This means 100 mallocs succeed, then next 100 fail 25% of the time, and
104		* all remaining (count is zero) succeed.
105		* The failure percentge can have 2 digits after the comma. For example:
106		* 0@0.01
107		* This means 0.01% of all allocations will fail.
108		*/
109		static void parseit(void)
110		{
111		char *semi = strchr(md_failstring, ';');
112		char *atsign;
113
114		if (semi != NULL)
115		*semi++ = '\0';
116
117		/* Get the count (atol will stop at the @ if there), and percentage */
118		md_count = atol(md_failstring);
119		atsign = strchr(md_failstring, '@');
120		md_fail_percent = atsign == NULL ? 0 : (int)(atof(atsign + 1) * 100 + 0.5);
121
122		if (semi != NULL)
123		md_failstring = semi;
124		}
125
126		/*
127		* Windows doesn't have random() and srandom(), but it has rand() and srand().
128		* Some rand() implementations aren't good, but we're not
129		* dealing with secure randomness here.
130		*/
131		# ifdef _WIN32
132		# define random() rand()
133		# define srandom(seed) srand(seed)
134		# endif
135		/*
136		* See if the current malloc should fail.
137		*/
138		static int shouldfail(void)
139		{
140		int roll = (int)(random() % 10000);
141		int shoulditfail = roll < md_fail_percent;
142		# ifndef _WIN32
143		/* suppressed on Windows as POSIX-like file descriptors are non-inheritable */
144		int len;
145		char buff[80];
146
147		if (md_tracefd > 0) {
148		BIO_snprintf(buff, sizeof(buff),
149		"%c C%ld %%%d R%d\n",
150		shoulditfail ? '-' : '+', md_count, md_fail_percent, roll);
151		len = strlen(buff);
152		if (write(md_tracefd, buff, len) != len)
153		perror("shouldfail write failed");
154		}
155		# endif
156
157		if (md_count) {
158		/* If we used up this one, go to the next. */
159		if (--md_count == 0)
160		parseit();
161		}
162
163		return shoulditfail;
164		}
165
166		void ossl_malloc_setup_failures(void)
167		{
168		const char *cp = getenv("OPENSSL_MALLOC_FAILURES");
169		size_t cplen = 0;
170
171		if (cp != NULL) {
172		/* if the value is too long we'll just ignore it */
173		cplen = strlen(cp);
174		if (cplen <= CRYPTO_MEM_CHECK_MAX_FS) {
175		strncpy(md_failbuf, cp, CRYPTO_MEM_CHECK_MAX_FS);
176		md_failstring = md_failbuf;
177		parseit();
178		}
179		}
180		if ((cp = getenv("OPENSSL_MALLOC_FD")) != NULL)
181		md_tracefd = atoi(cp);
182		if ((cp = getenv("OPENSSL_MALLOC_SEED")) != NULL)
183		srandom(atoi(cp));
184		}
185		#endif
186
187		void CRYPTO_malloc(size_t num, const char file, int line)
188	696k	{
189	696k	void *ptr;
190
191	696k	INCREMENT(malloc_count);
192	696k	if (malloc_impl != CRYPTO_malloc) {
193	0	ptr = malloc_impl(num, file, line);
194	0	if (ptr != NULL \|\| num == 0)
195	0	return ptr;
196	0	goto err;
197	0	}
198
199	696k	if (ossl_unlikely(num == 0))
200	0	return NULL;
201
202	696k	FAILTEST();
203	696k	if (allow_customize) {
204		/*
205		* Disallow customization after the first allocation. We only set this
206		* if necessary to avoid a store to the same cache line on every
207		* allocation.
208		*/
209	16	allow_customize = 0;
210	16	}
211
212	696k	ptr = malloc(num);
213	696k	if (ossl_likely(ptr != NULL))
214	696k	return ptr;
215	0	err:
216	0	ossl_report_alloc_err(file, line);
217	0	return NULL;
218	696k	}
219
220		void CRYPTO_zalloc(size_t num, const char file, int line)
221	521k	{
222	521k	void *ret;
223
224	521k	ret = CRYPTO_malloc(num, file, line);
225	521k	if (ret != NULL)
226	521k	memset(ret, 0, num);
227
228	521k	return ret;
229	521k	}
230
231		void CRYPTO_aligned_alloc(size_t num, size_t alignment, void *freeptr,
232		const char *file, int line)
233	32	{
234	32	*freeptr = NULL;
235
236		/* Ensure that alignment is a power of two no larger than 65536 */
237	32	if (alignment == 0 \|\| (alignment & (alignment - 1)) != 0
238	32	\|\| alignment > 65536) {
239	0	ossl_report_alloc_err_inv(file, line);
240	0	return NULL;
241	0	}
242
243		/* Allow non-malloc() allocations as long as no malloc_impl is provided. */
244	32	if (malloc_impl == CRYPTO_malloc) {
245	32	#if defined(_BSD_SOURCE) \|\| (defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 200112L)
246	32	void *ret;
247
248		/* posix_memalign() requires alignment to be at least sizeof(void ) /
249	32	if (alignment < sizeof(void *))
250	0	alignment = sizeof(void *);
251
252	32	if (posix_memalign(&ret, alignment, num) == 0) {
253	32	*freeptr = ret;
254	32	return ret;
255	32	}
256	32	#endif
257	32	}
258
259	0	return ossl_malloc_align(num, alignment, freeptr, file, line);
260	32	}
261
262		void CRYPTO_realloc(void str, size_t num, const char *file, int line)
263	416	{
264	416	void *ret;
265
266	416	INCREMENT(realloc_count);
267	416	if (realloc_impl != CRYPTO_realloc) {
268	0	ret = realloc_impl(str, num, file, line);
269
270	0	if (num == 0 \|\| ret != NULL)
271	0	return ret;
272
273	0	goto err;
274	0	}
275
276	416	if (str == NULL)
277	32	return CRYPTO_malloc(num, file, line);
278
279	384	if (num == 0) {
280	0	CRYPTO_free(str, file, line);
281	0	return NULL;
282	0	}
283
284	384	FAILTEST();
285	384	ret = realloc(str, num);
286
287	384	err:
288	384	if (num != 0 && ret == NULL)
289	0	ossl_report_alloc_err(file, line);
290
291	384	return ret;
292	384	}
293
294		void CRYPTO_clear_realloc(void str, size_t old_len, size_t num,
295		const char *file, int line)
296	0	{
297	0	void *ret = NULL;
298
299	0	if (str == NULL)
300	0	return CRYPTO_malloc(num, file, line);
301
302	0	if (num == 0) {
303	0	CRYPTO_clear_free(str, old_len, file, line);
304	0	return NULL;
305	0	}
306
307		/* Can't shrink the buffer since memcpy below copies \|old_len\| bytes. */
308	0	if (num < old_len) {
309	0	OPENSSL_cleanse((char*)str + num, old_len - num);
310	0	return str;
311	0	}
312
313	0	ret = CRYPTO_malloc(num, file, line);
314	0	if (ret != NULL) {
315	0	memcpy(ret, str, old_len);
316	0	CRYPTO_clear_free(str, old_len, file, line);
317	0	}
318	0	return ret;
319	0	}
320
321		void CRYPTO_free(void str, const char file, int line)
322	971k	{
323	971k	INCREMENT(free_count);
324	971k	if (free_impl != CRYPTO_free) {
325	0	free_impl(str, file, line);
326	0	return;
327	0	}
328
329	971k	free(str);
330	971k	}
331
332		void CRYPTO_clear_free(void str, size_t num, const char file, int line)
333	86.6k	{
334	86.6k	if (str == NULL)
335	0	return;
336	86.6k	if (num)
337	86.6k	OPENSSL_cleanse(str, num);
338	86.6k	CRYPTO_free(str, file, line);
339	86.6k	}
340
341		#if !defined(OPENSSL_NO_CRYPTO_MDEBUG)
342
343		# ifndef OPENSSL_NO_DEPRECATED_3_0
344		int CRYPTO_mem_ctrl(int mode)
345		{
346		(void)mode;
347		return -1;
348		}
349
350		int CRYPTO_set_mem_debug(int flag)
351		{
352		(void)flag;
353		return -1;
354		}
355
356		int CRYPTO_mem_debug_push(const char info, const char file, int line)
357		{
358		(void)info; (void)file; (void)line;
359		return 0;
360		}
361
362		int CRYPTO_mem_debug_pop(void)
363		{
364		return 0;
365		}
366
367		void CRYPTO_mem_debug_malloc(void *addr, size_t num, int flag,
368		const char *file, int line)
369		{
370		(void)addr; (void)num; (void)flag; (void)file; (void)line;
371		}
372
373		void CRYPTO_mem_debug_realloc(void addr1, void addr2, size_t num, int flag,
374		const char *file, int line)
375		{
376		(void)addr1; (void)addr2; (void)num; (void)flag; (void)file; (void)line;
377		}
378
379		void CRYPTO_mem_debug_free(void *addr, int flag,
380		const char *file, int line)
381		{
382		(void)addr; (void)flag; (void)file; (void)line;
383		}
384
385		int CRYPTO_mem_leaks(BIO *b)
386		{
387		(void)b;
388		return -1;
389		}
390
391		# ifndef OPENSSL_NO_STDIO
392		int CRYPTO_mem_leaks_fp(FILE *fp)
393		{
394		(void)fp;
395		return -1;
396		}
397		# endif
398
399		int CRYPTO_mem_leaks_cb(int (cb)(const char str, size_t len, void *u),
400		void *u)
401		{
402		(void)cb; (void)u;
403		return -1;
404		}
405
406		# endif
407
408		#endif