1 #define assert(e) do { \
2 if (config_debug && !(e)) { \
3 malloc_write("<jemalloc>: Failed assertion\n"); \
8 #define not_reached() do { \
10 malloc_write("<jemalloc>: Unreachable code reached\n"); \
15 #define not_implemented() do { \
17 malloc_write("<jemalloc>: Not implemented\n"); \
22 #define JEMALLOC_UTIL_C_
23 #include "jemalloc/internal/jemalloc_internal.h"
25 /******************************************************************************/
26 /* Function prototypes for non-inline static functions. */
28 static void wrtmessage(void *cbopaque, const char *s);
29 #define U2S_BUFSIZE ((1U << (LG_SIZEOF_INTMAX_T + 3)) + 1)
30 static char *u2s(uintmax_t x, unsigned base, bool uppercase, char *s,
32 #define D2S_BUFSIZE (1 + U2S_BUFSIZE)
33 static char *d2s(intmax_t x, char sign, char *s, size_t *slen_p);
34 #define O2S_BUFSIZE (1 + U2S_BUFSIZE)
35 static char *o2s(uintmax_t x, bool alt_form, char *s, size_t *slen_p);
36 #define X2S_BUFSIZE (2 + U2S_BUFSIZE)
37 static char *x2s(uintmax_t x, bool alt_form, bool uppercase, char *s,
40 /******************************************************************************/
42 /* malloc_message() setup. */
44 wrtmessage(void *cbopaque, const char *s)
49 * Use syscall(2) rather than write(2) when possible in order to avoid
50 * the possibility of memory allocation within libc. This is necessary
51 * on FreeBSD; most operating systems do not have this problem though.
53 UNUSED int result = syscall(SYS_write, STDERR_FILENO, s, strlen(s));
55 UNUSED int result = write(STDERR_FILENO, s, strlen(s));
59 JEMALLOC_EXPORT void (*je_malloc_message)(void *, const char *s);
61 JEMALLOC_ATTR(visibility("hidden"))
63 wrtmessage_1_0(const char *s1, const char *s2, const char *s3,
73 void (*__malloc_message_1_0)(const char *s1, const char *s2, const char *s3,
74 const char *s4) = wrtmessage_1_0;
75 __sym_compat(_malloc_message, __malloc_message_1_0, FBSD_1.0);
78 * Wrapper around malloc_message() that avoids the need for
79 * je_malloc_message(...) throughout the code.
82 malloc_write(const char *s)
85 if (je_malloc_message != NULL)
86 je_malloc_message(NULL, s);
92 * glibc provides a non-standard strerror_r() when _GNU_SOURCE is defined, so
96 buferror(char *buf, size_t buflen)
100 FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM, NULL, GetLastError(), 0,
101 (LPSTR)buf, buflen, NULL);
103 #elif defined(_GNU_SOURCE)
104 char *b = strerror_r(errno, buf, buflen);
106 strncpy(buf, b, buflen);
107 buf[buflen-1] = '\0';
111 return (strerror_r(errno, buf, buflen));
116 malloc_strtoumax(const char *nptr, char **endptr, int base)
118 uintmax_t ret, digit;
123 if (base < 0 || base == 1 || base > 36) {
125 return (UINTMAX_MAX);
129 /* Swallow leading whitespace and get sign, if any. */
134 case '\t': case '\n': case '\v': case '\f': case '\r': case ' ':
148 /* Get prefix, if any. */
151 * Note where the first non-whitespace/sign character is so that it is
152 * possible to tell whether any digits are consumed (e.g., " 0" vs.
158 case '0': case '1': case '2': case '3': case '4': case '5':
167 case '0': case '1': case '2': case '3': case '4':
168 case '5': case '6': case '7': case '8': case '9':
169 case 'A': case 'B': case 'C': case 'D': case 'E':
171 case 'a': case 'b': case 'c': case 'd': case 'e':
191 while ((*p >= '0' && *p <= '9' && (digit = *p - '0') < b)
192 || (*p >= 'A' && *p <= 'Z' && (digit = 10 + *p - 'A') < b)
193 || (*p >= 'a' && *p <= 'z' && (digit = 10 + *p - 'a') < b)) {
194 uintmax_t pret = ret;
200 return (UINTMAX_MAX);
207 if (endptr != NULL) {
209 /* No characters were converted. */
210 *endptr = (char *)nptr;
219 u2s(uintmax_t x, unsigned base, bool uppercase, char *s, size_t *slen_p)
229 s[i] = "0123456789"[x % (uint64_t)10];
234 const char *digits = (uppercase)
236 : "0123456789abcdef";
240 s[i] = digits[x & 0xf];
245 const char *digits = (uppercase)
246 ? "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
247 : "0123456789abcdefghijklmnopqrstuvwxyz";
249 assert(base >= 2 && base <= 36);
252 s[i] = digits[x % (uint64_t)base];
257 *slen_p = U2S_BUFSIZE - 1 - i;
262 d2s(intmax_t x, char sign, char *s, size_t *slen_p)
268 s = u2s(x, 10, false, s, slen_p);
282 default: not_reached();
288 o2s(uintmax_t x, bool alt_form, char *s, size_t *slen_p)
291 s = u2s(x, 8, false, s, slen_p);
292 if (alt_form && *s != '0') {
301 x2s(uintmax_t x, bool alt_form, bool uppercase, char *s, size_t *slen_p)
304 s = u2s(x, 16, uppercase, s, slen_p);
308 memcpy(s, uppercase ? "0X" : "0x", 2);
314 malloc_vsnprintf(char *str, size_t size, const char *format, va_list ap)
320 #define APPEND_C(c) do { \
325 #define APPEND_S(s, slen) do { \
327 size_t cpylen = (slen <= size - i) ? slen : size - i; \
328 memcpy(&str[i], s, cpylen); \
332 #define APPEND_PADDED_S(s, slen, width, left_justify) do { \
333 /* Left padding. */ \
334 size_t pad_len = (width == -1) ? 0 : ((slen < (size_t)width) ? \
335 (size_t)width - slen : 0); \
336 if (left_justify == false && pad_len != 0) { \
338 for (j = 0; j < pad_len; j++) \
343 /* Right padding. */ \
344 if (left_justify && pad_len != 0) { \
346 for (j = 0; j < pad_len; j++) \
350 #define GET_ARG_NUMERIC(val, len) do { \
353 val = va_arg(ap, int); \
356 val = va_arg(ap, unsigned int); \
359 val = va_arg(ap, long); \
362 val = va_arg(ap, unsigned long); \
365 val = va_arg(ap, long long); \
368 val = va_arg(ap, unsigned long long); \
371 val = va_arg(ap, intmax_t); \
374 val = va_arg(ap, ptrdiff_t); \
377 val = va_arg(ap, ssize_t); \
380 val = va_arg(ap, size_t); \
382 case 'p': /* Synthetic; used for %p. */ \
383 val = va_arg(ap, uintptr_t); \
385 default: not_reached(); \
393 case '\0': goto label_out;
395 bool alt_form = false;
396 bool left_justify = false;
397 bool plus_space = false;
398 bool plus_plus = false;
401 unsigned char len = '?';
413 assert(alt_form == false);
417 assert(left_justify == false);
421 assert(plus_space == false);
425 assert(plus_plus == false);
428 default: goto label_width;
436 width = va_arg(ap, int);
439 case '0': case '1': case '2': case '3': case '4':
440 case '5': case '6': case '7': case '8': case '9': {
443 uwidth = malloc_strtoumax(f, (char **)&f, 10);
444 assert(uwidth != UINTMAX_MAX || get_errno() !=
449 goto label_precision;
455 goto label_precision;
456 default: goto label_length;
462 prec = va_arg(ap, int);
465 case '0': case '1': case '2': case '3': case '4':
466 case '5': case '6': case '7': case '8': case '9': {
469 uprec = malloc_strtoumax(f, (char **)&f, 10);
470 assert(uprec != UINTMAX_MAX || get_errno() !=
502 /* Conversion specifier. */
506 case 'd': case 'i': {
507 intmax_t val JEMALLOC_CC_SILENCE_INIT(0);
508 char buf[D2S_BUFSIZE];
510 GET_ARG_NUMERIC(val, len);
511 s = d2s(val, (plus_plus ? '+' : (plus_space ?
512 ' ' : '-')), buf, &slen);
513 APPEND_PADDED_S(s, slen, width, left_justify);
517 uintmax_t val JEMALLOC_CC_SILENCE_INIT(0);
518 char buf[O2S_BUFSIZE];
520 GET_ARG_NUMERIC(val, len | 0x80);
521 s = o2s(val, alt_form, buf, &slen);
522 APPEND_PADDED_S(s, slen, width, left_justify);
526 uintmax_t val JEMALLOC_CC_SILENCE_INIT(0);
527 char buf[U2S_BUFSIZE];
529 GET_ARG_NUMERIC(val, len | 0x80);
530 s = u2s(val, 10, false, buf, &slen);
531 APPEND_PADDED_S(s, slen, width, left_justify);
534 } case 'x': case 'X': {
535 uintmax_t val JEMALLOC_CC_SILENCE_INIT(0);
536 char buf[X2S_BUFSIZE];
538 GET_ARG_NUMERIC(val, len | 0x80);
539 s = x2s(val, alt_form, *f == 'X', buf, &slen);
540 APPEND_PADDED_S(s, slen, width, left_justify);
547 assert(len == '?' || len == 'l');
548 assert_not_implemented(len != 'l');
549 val = va_arg(ap, int);
552 APPEND_PADDED_S(buf, 1, width, left_justify);
556 assert(len == '?' || len == 'l');
557 assert_not_implemented(len != 'l');
558 s = va_arg(ap, char *);
559 slen = (prec == -1) ? strlen(s) : prec;
560 APPEND_PADDED_S(s, slen, width, left_justify);
565 char buf[X2S_BUFSIZE];
567 GET_ARG_NUMERIC(val, 'p');
568 s = x2s(val, true, false, buf, &slen);
569 APPEND_PADDED_S(s, slen, width, left_justify);
573 default: not_implemented();
586 str[size - 1] = '\0';
591 #undef APPEND_PADDED_S
592 #undef GET_ARG_NUMERIC
596 JEMALLOC_ATTR(format(printf, 3, 4))
598 malloc_snprintf(char *str, size_t size, const char *format, ...)
603 va_start(ap, format);
604 ret = malloc_vsnprintf(str, size, format, ap);
611 malloc_vcprintf(void (*write_cb)(void *, const char *), void *cbopaque,
612 const char *format, va_list ap)
614 char buf[MALLOC_PRINTF_BUFSIZE];
616 if (write_cb == NULL) {
618 * The caller did not provide an alternate write_cb callback
619 * function, so use the default one. malloc_write() is an
620 * inline function, so use malloc_message() directly here.
622 write_cb = (je_malloc_message != NULL) ? je_malloc_message :
627 malloc_vsnprintf(buf, sizeof(buf), format, ap);
628 write_cb(cbopaque, buf);
632 * Print to a callback function in such a way as to (hopefully) avoid memory
635 JEMALLOC_ATTR(format(printf, 3, 4))
637 malloc_cprintf(void (*write_cb)(void *, const char *), void *cbopaque,
638 const char *format, ...)
642 va_start(ap, format);
643 malloc_vcprintf(write_cb, cbopaque, format, ap);
647 /* Print to stderr in such a way as to avoid memory allocation. */
648 JEMALLOC_ATTR(format(printf, 1, 2))
650 malloc_printf(const char *format, ...)
654 va_start(ap, format);
655 malloc_vcprintf(NULL, NULL, format, ap);