#define JEMALLOC_MALLOC_IO_C_
#include "jemalloc/internal/jemalloc_preamble.h"
#include "jemalloc/internal/jemalloc_internal_includes.h"
#include "jemalloc/internal/malloc_io.h"
#include "jemalloc/internal/util.h"
#ifdef assert
# undef assert
#endif
#ifdef not_reached
# undef not_reached
#endif
#ifdef not_implemented
# undef not_implemented
#endif
#ifdef assert_not_implemented
# undef assert_not_implemented
#endif
/*
* Define simple versions of assertion macros that won't recurse in case
* of assertion failures in malloc_*printf().
*/
#define assert(e) do { \
if (config_debug && !(e)) { \
malloc_write("<jemalloc>: Failed assertion\n"); \
abort(); \
} \
} while (0)
#define not_reached() do { \
if (config_debug) { \
malloc_write("<jemalloc>: Unreachable code reached\n"); \
abort(); \
} \
unreachable(); \
} while (0)
#define not_implemented() do { \
if (config_debug) { \
malloc_write("<jemalloc>: Not implemented\n"); \
abort(); \
} \
} while (0)
#define assert_not_implemented(e) do { \
if (unlikely(config_debug && !(e))) { \
not_implemented(); \
} \
} while (0)
/******************************************************************************/
/* Function prototypes for non-inline static functions. */
static void wrtmessage(void *cbopaque, const char *s);
#define U2S_BUFSIZE ((1U << (LG_SIZEOF_INTMAX_T + 3)) + 1)
static char *u2s(uintmax_t x, unsigned base, bool uppercase, char *s,
size_t *slen_p);
#define D2S_BUFSIZE (1 + U2S_BUFSIZE)
static char *d2s(intmax_t x, char sign, char *s, size_t *slen_p);
#define O2S_BUFSIZE (1 + U2S_BUFSIZE)
static char *o2s(uintmax_t x, bool alt_form, char *s, size_t *slen_p);
#define X2S_BUFSIZE (2 + U2S_BUFSIZE)
static char *x2s(uintmax_t x, bool alt_form, bool uppercase, char *s,
size_t *slen_p);
/******************************************************************************/
/* malloc_message() setup. */
static void
wrtmessage(void *cbopaque, const char *s) {
malloc_write_fd(STDERR_FILENO, s, strlen(s));
}
JEMALLOC_EXPORT void (*je_malloc_message)(void *, const char *s);
/*
* Wrapper around malloc_message() that avoids the need for
* je_malloc_message(...) throughout the code.
*/
void
malloc_write(const char *s) {
if (je_malloc_message != NULL) {
je_malloc_message(NULL, s);
} else {
wrtmessage(NULL, s);
}
}
/*
* glibc provides a non-standard strerror_r() when _GNU_SOURCE is defined, so
* provide a wrapper.
*/
int
buferror(int err, char *buf, size_t buflen) {
#ifdef _WIN32
FormatMessageA(FORMAT_MESSAGE_FROM_SYSTEM, NULL, err, 0,
(LPSTR)buf, (DWORD)buflen, NULL);
return 0;
#elif defined(JEMALLOC_STRERROR_R_RETURNS_CHAR_WITH_GNU_SOURCE) && defined(_GNU_SOURCE)
char *b = strerror_r(err, buf, buflen);
if (b != buf) {
strncpy(buf, b, buflen);
buf[buflen-1] = '\0';
}
return 0;
#else
return strerror_r(err, buf, buflen);
#endif
}
uintmax_t
malloc_strtoumax(const char *restrict nptr, char **restrict endptr, int base) {
uintmax_t ret, digit;
unsigned b;
bool neg;
const char *p, *ns;
p = nptr;
if (base < 0 || base == 1 || base > 36) {
ns = p;
set_errno(EINVAL);
ret = UINTMAX_MAX;
goto label_return;
}
b = base;
/* Swallow leading whitespace and get sign, if any. */
neg = false;
while (true) {
switch (*p) {
case '\t': case '\n': case '\v': case '\f': case '\r': case ' ':
p++;
break;
case '-':
neg = true;
/* Fall through. */
case '+':
p++;
/* Fall through. */
default:
goto label_prefix;
}
}
/* Get prefix, if any. */
label_prefix:
/*
* Note where the first non-whitespace/sign character is so that it is
* possible to tell whether any digits are consumed (e.g., " 0" vs.
* " -x").
*/
ns = p;
if (*p == '0') {
switch (p[1]) {
case '0': case '1': case '2': case '3': case '4': case '5':
case '6': case '7':
if (b == 0) {
b = 8;
}
if (b == 8) {
p++;
}
break;
case 'X': case 'x':
switch (p[2]) {
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
case 'A': case 'B': case 'C': case 'D': case 'E':
case 'F':
case 'a': case 'b': case 'c': case 'd': case 'e':
case 'f':
if (b == 0) {
b = 16;
}
if (b == 16) {
p += 2;
}
break;
default:
break;
}
break;
default:
p++;
ret = 0;
goto label_return;
}
}
if (b == 0) {
b = 10;
}
/* Convert. */
ret = 0;
while ((*p >= '0' && *p <= '9' && (digit = *p - '0') < b)
|| (*p >= 'A' && *p <= 'Z' && (digit = 10 + *p - 'A') < b)
|| (*p >= 'a' && *p <= 'z' && (digit = 10 + *p - 'a') < b)) {
uintmax_t pret = ret;
ret *= b;
ret += digit;
if (ret < pret) {
/* Overflow. */
set_errno(ERANGE);
ret = UINTMAX_MAX;
goto label_return;
}
p++;
}
if (neg) {
ret = (uintmax_t)(-((intmax_t)ret));
}
if (p == ns) {
/* No conversion performed. */
set_errno(EINVAL);
ret = UINTMAX_MAX;
goto label_return;
}
label_return:
if (endptr != NULL) {
if (p == ns) {
/* No characters were converted. */
*endptr = (char *)nptr;
} else {
*endptr = (char *)p;
}
}
return ret;
}
static char *
u2s(uintmax_t x, unsigned base, bool uppercase, char *s, size_t *slen_p) {
unsigned i;
i = U2S_BUFSIZE - 1;
s[i] = '\0';
switch (base) {
case 10:
do {
i--;
s[i] = "0123456789"[x % (uint64_t)10];
x /= (uint64_t)10;
} while (x > 0);
break;
case 16: {
const char *digits = (uppercase)
? "0123456789ABCDEF"
: "0123456789abcdef";
do {
i--;
s[i] = digits[x & 0xf];
x >>= 4;
} while (x > 0);
break;
} default: {
const char *digits = (uppercase)
? "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"
: "0123456789abcdefghijklmnopqrstuvwxyz";
assert(base >= 2 && base <= 36);
do {
i--;
s[i] = digits[x % (uint64_t)base];
x /= (uint64_t)base;
} while (x > 0);
}}
*slen_p = U2S_BUFSIZE - 1 - i;
return &s[i];
}
static char *
d2s(intmax_t x, char sign, char *s, size_t *slen_p) {
bool neg;
if ((neg = (x < 0))) {
x = -x;
}
s = u2s(x, 10, false, s, slen_p);
if (neg) {
sign = '-';
}
switch (sign) {
case '-':
if (!neg) {
break;
}
/* Fall through. */
case ' ':
case '+':
s--;
(*slen_p)++;
*s = sign;
break;
default: not_reached();
}
return s;
}
static char *
o2s(uintmax_t x, bool alt_form, char *s, size_t *slen_p) {
s = u2s(x, 8, false, s, slen_p);
if (alt_form && *s != '0') {
s--;
(*slen_p)++;
*s = '0';
}
return s;
}
static char *
x2s(uintmax_t x, bool alt_form, bool uppercase, char *s, size_t *slen_p) {
s = u2s(x, 16, uppercase, s, slen_p);
if (alt_form) {
s -= 2;
(*slen_p) += 2;
memcpy(s, uppercase ? "0X" : "0x", 2);
}
return s;
}
size_t
malloc_vsnprintf(char *str, size_t size, const char *format, va_list ap) {
size_t i;
const char *f;
#define APPEND_C(c) do { \
if (i < size) { \
str[i] = (c); \
} \
i++; \
} while (0)
#define APPEND_S(s, slen) do { \
if (i < size) { \
size_t cpylen = (slen <= size - i) ? slen : size - i; \
memcpy(&str[i], s, cpylen); \
} \
i += slen; \
} while (0)
#define APPEND_PADDED_S(s, slen, width, left_justify) do { \
/* Left padding. */ \
size_t pad_len = (width == -1) ? 0 : ((slen < (size_t)width) ? \
(size_t)width - slen : 0); \
if (!left_justify && pad_len != 0) { \
size_t j; \
for (j = 0; j < pad_len; j++) { \
APPEND_C(' '); \
} \
} \
/* Value. */ \
APPEND_S(s, slen); \
/* Right padding. */ \
if (left_justify && pad_len != 0) { \
size_t j; \
for (j = 0; j < pad_len; j++) { \
APPEND_C(' '); \
} \
} \
} while (0)
#define GET_ARG_NUMERIC(val, len) do { \
switch ((unsigned char)len) { \
case '?': \
val = va_arg(ap, int); \
break; \
case '?' | 0x80: \
val = va_arg(ap, unsigned int); \
break; \
case 'l': \
val = va_arg(ap, long); \
break; \
case 'l' | 0x80: \
val = va_arg(ap, unsigned long); \
break; \
case 'q': \
val = va_arg(ap, long long); \
break; \
case 'q' | 0x80: \
val = va_arg(ap, unsigned long long); \
break; \
case 'j': \
val = va_arg(ap, intmax_t); \
break; \
case 'j' | 0x80: \
val = va_arg(ap, uintmax_t); \
break; \
case 't': \
val = va_arg(ap, ptrdiff_t); \
break; \
case 'z': \
val = va_arg(ap, ssize_t); \
break; \
case 'z' | 0x80: \
val = va_arg(ap, size_t); \
break; \
case 'p': /* Synthetic; used for %p. */ \
val = va_arg(ap, uintptr_t); \
break; \
default: \
not_reached(); \
val = 0; \
} \
} while (0)
i = 0;
f = format;
while (true) {
switch (*f) {
case '\0': goto label_out;
case '%': {
bool alt_form = false;
bool left_justify = false;
bool plus_space = false;
bool plus_plus = false;
int prec = -1;
int width = -1;
unsigned char len = '?';
char *s;
size_t slen;
f++;
/* Flags. */
while (true) {
switch (*f) {
case '#':
assert(!alt_form);
alt_form = true;
break;
case '-':
assert(!left_justify);
left_justify = true;
break;
case ' ':
assert(!plus_space);
plus_space = true;
break;
case '+':
assert(!plus_plus);
plus_plus = true;
break;
default: goto label_width;
}
f++;
}
/* Width. */
label_width:
switch (*f) {
case '*':
width = va_arg(ap, int);
f++;
if (width < 0) {
left_justify = true;
width = -width;
}
break;
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9': {
uintmax_t uwidth;
set_errno(0);
uwidth = malloc_strtoumax(f, (char **)&f, 10);
assert(uwidth != UINTMAX_MAX || get_errno() !=
ERANGE);
width = (int)uwidth;
break;
} default:
break;
}
/* Width/precision separator. */
if (*f == '.') {
f++;
} else {
goto label_length;
}
/* Precision. */
switch (*f) {
case '*':
prec = va_arg(ap, int);
f++;
break;
case '0': case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9': {
uintmax_t uprec;
set_errno(0);
uprec = malloc_strtoumax(f, (char **)&f, 10);
assert(uprec != UINTMAX_MAX || get_errno() !=
ERANGE);
prec = (int)uprec;
break;
}
default: break;
}
/* Length. */
label_length:
switch (*f) {
case 'l':
f++;
if (*f == 'l') {
len = 'q';
f++;
} else {
len = 'l';
}
break;
case 'q': case 'j': case 't': case 'z':
len = *f;
f++;
break;
default: break;
}
/* Conversion specifier. */
switch (*f) {
case '%':
/* %% */
APPEND_C(*f);
f++;
break;
case 'd': case 'i': {
intmax_t val JEMALLOC_CC_SILENCE_INIT(0);
char buf[D2S_BUFSIZE];
GET_ARG_NUMERIC(val, len);
s = d2s(val, (plus_plus ? '+' : (plus_space ?
' ' : '-')), buf, &slen);
APPEND_PADDED_S(s, slen, width, left_justify);
f++;
break;
} case 'o': {
uintmax_t val JEMALLOC_CC_SILENCE_INIT(0);
char buf[O2S_BUFSIZE];
GET_ARG_NUMERIC(val, len | 0x80);
s = o2s(val, alt_form, buf, &slen);
APPEND_PADDED_S(s, slen, width, left_justify);
f++;
break;
} case 'u': {
uintmax_t val JEMALLOC_CC_SILENCE_INIT(0);
char buf[U2S_BUFSIZE];
GET_ARG_NUMERIC(val, len | 0x80);
s = u2s(val, 10, false, buf, &slen);
APPEND_PADDED_S(s, slen, width, left_justify);
f++;
break;
} case 'x': case 'X': {
uintmax_t val JEMALLOC_CC_SILENCE_INIT(0);
char buf[X2S_BUFSIZE];
GET_ARG_NUMERIC(val, len | 0x80);
s = x2s(val, alt_form, *f == 'X', buf, &slen);
APPEND_PADDED_S(s, slen, width, left_justify);
f++;
break;
} case 'c': {
unsigned char val;
char buf[2];
assert(len == '?' || len == 'l');
assert_not_implemented(len != 'l');
val = va_arg(ap, int);
buf[0] = val;
buf[1] = '\0';
APPEND_PADDED_S(buf, 1, width, left_justify);
f++;
break;
} case 's':
assert(len == '?' || len == 'l');
assert_not_implemented(len != 'l');
s = va_arg(ap, char *);
slen = (prec < 0) ? strlen(s) : (size_t)prec;
APPEND_PADDED_S(s, slen, width, left_justify);
f++;
break;
case 'p': {
uintmax_t val;
char buf[X2S_BUFSIZE];
GET_ARG_NUMERIC(val, 'p');
s = x2s(val, true, false, buf, &slen);
APPEND_PADDED_S(s, slen, width, left_justify);
f++;
break;
} default: not_reached();
}
break;
} default: {
APPEND_C(*f);
f++;
break;
}}
}
label_out:
if (i < size) {
str[i] = '\0';
} else {
str[size - 1] = '\0';
}
#undef APPEND_C
#undef APPEND_S
#undef APPEND_PADDED_S
#undef GET_ARG_NUMERIC
return i;
}
JEMALLOC_FORMAT_PRINTF(3, 4)
size_t
malloc_snprintf(char *str, size_t size, const char *format, ...) {
size_t ret;
va_list ap;
va_start(ap, format);
ret = malloc_vsnprintf(str, size, format, ap);
va_end(ap);
return ret;
}
void
malloc_vcprintf(void (*write_cb)(void *, const char *), void *cbopaque,
const char *format, va_list ap) {
char buf[MALLOC_PRINTF_BUFSIZE];
if (write_cb == NULL) {
/*
* The caller did not provide an alternate write_cb callback
* function, so use the default one. malloc_write() is an
* inline function, so use malloc_message() directly here.
*/
write_cb = (je_malloc_message != NULL) ? je_malloc_message :
wrtmessage;
}
malloc_vsnprintf(buf, sizeof(buf), format, ap);
write_cb(cbopaque, buf);
}
/*
* Print to a callback function in such a way as to (hopefully) avoid memory
* allocation.
*/
JEMALLOC_FORMAT_PRINTF(3, 4)
void
malloc_cprintf(void (*write_cb)(void *, const char *), void *cbopaque,
const char *format, ...) {
va_list ap;
va_start(ap, format);
malloc_vcprintf(write_cb, cbopaque, format, ap);
va_end(ap);
}
/* Print to stderr in such a way as to avoid memory allocation. */
JEMALLOC_FORMAT_PRINTF(1, 2)
void
malloc_printf(const char *format, ...) {
va_list ap;
va_start(ap, format);
malloc_vcprintf(NULL, NULL, format, ap);
va_end(ap);
}
/*
* Restore normal assertion macros, in order to make it possible to compile all
* C files as a single concatenation.
*/
#undef assert
#undef not_reached
#undef not_implemented
#undef assert_not_implemented
#include "jemalloc/internal/assert.h"