| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | #include <errno.h> | ||
| 2 | #include <limits.h> | ||
| 3 | #include <stdarg.h> | ||
| 4 | #include <stdio.h> | ||
| 5 | #include <stdlib.h> | ||
| 6 | #include "xmalloc.h" | ||
| 7 | #include "debug.h" | ||
| 8 | #include "xsnprintf.h" | ||
| 9 | |||
| 10 | 84518 | static void *check_alloc(void *alloc) | |
| 11 | { | ||
| 12 |
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84518 | FATAL_ERROR_ON(alloc == NULL, ENOMEM); |
| 13 | 84518 | return alloc; | |
| 14 | } | ||
| 15 | |||
| 16 | // Like malloc(3), but calling fatal_error() on OOM and forbidding | ||
| 17 | // zero-sized allocations (thus never returning NULL) | ||
| 18 | 50387 | void *xmalloc(size_t size) | |
| 19 | { | ||
| 20 | 50387 | BUG_ON(size == 0); | |
| 21 | 50387 | return check_alloc(malloc(size)); | |
| 22 | } | ||
| 23 | |||
| 24 | 3857 | void *xcalloc(size_t nmemb, size_t size) | |
| 25 | { | ||
| 26 | 3857 | bool overflow = calloc_args_have_ub_overflow(nmemb, size); | |
| 27 |
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3857 | FATAL_ERROR_ON(overflow, EOVERFLOW); |
| 28 | 3857 | BUG_ON(nmemb == 0 || size == 0); | |
| 29 | 3857 | return check_alloc(calloc(nmemb, size)); // NOLINT(*-unsafe-functions) | |
| 30 | } | ||
| 31 | |||
| 32 | 14081 | void *xrealloc(void *ptr, size_t size) | |
| 33 | { | ||
| 34 | 14081 | BUG_ON(size == 0); | |
| 35 | 14081 | return check_alloc(realloc(ptr, size)); | |
| 36 | } | ||
| 37 | |||
| 38 | 16193 | char *xstrdup(const char *str) | |
| 39 | { | ||
| 40 | 16193 | return check_alloc(strdup(str)); // NOLINT(*-unsafe-functions) | |
| 41 | } | ||
| 42 | |||
| 43 | VPRINTF(1) | ||
| 44 | 2 | static char *xvasprintf(const char *format, va_list ap) | |
| 45 | { | ||
| 46 | 2 | va_list ap2; | |
| 47 | 2 | va_copy(ap2, ap); | |
| 48 | 2 | int n = vsnprintf(NULL, 0, format, ap2); | |
| 49 | 2 | va_end(ap2); | |
| 50 | |||
| 51 |
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2 | if (unlikely(n < 0 || n == INT_MAX || n >= SIZE_MAX)) { |
| 52 | − | fatal_error(__func__, n < 0 ? errno : EOVERFLOW); | |
| 53 | } | ||
| 54 | |||
| 55 | 2 | char *str = xmalloc(n + 1); | |
| 56 | 2 | size_t m = xvsnprintf(str, n + 1, format, ap); | |
| 57 | 2 | BUG_ON(m != n); | |
| 58 | 2 | return str; | |
| 59 | } | ||
| 60 | |||
| 61 | 2 | char *xasprintf(const char *format, ...) | |
| 62 | { | ||
| 63 | 2 | va_list ap; | |
| 64 | 2 | va_start(ap, format); | |
| 65 | 2 | char *str = xvasprintf(format, ap); | |
| 66 | 2 | va_end(ap); | |
| 67 | 2 | return str; | |
| 68 | } | ||
| 69 |