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1 | #ifndef _LTT_FACILITY_CUSTOM_USER_GENERIC_H_ |
2 | #define _LTT_FACILITY_CUSTOM_USER_GENERIC_H_ |
3 | |
4 | #include <sys/types.h> |
5 | #include <ltt/ltt-facility-id-user_generic.h> |
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6 | #include <ltt/ltt-usertrace.h> |
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7 | #include <stdio.h> |
8 | #include <stdlib.h> |
9 | #include <stdarg.h> |
10 | |
11 | static inline int trace_user_generic_slow_printf( |
12 | const char *fmt, ...) |
13 | #ifndef LTT_TRACE |
14 | { |
15 | } |
16 | #else |
17 | { |
18 | /* Guess we need no more than 100 bytes. */ |
19 | int n, size = 100; |
20 | char *p, *np; |
21 | va_list ap; |
22 | int ret; |
23 | |
24 | if ((p = malloc (size)) == NULL) |
25 | return -1; |
26 | |
27 | while (1) { |
28 | /* Try to print in the allocated space. */ |
29 | va_start(ap, fmt); |
30 | n = vsnprintf (p, size, fmt, ap); |
31 | va_end(ap); |
32 | /* If that worked, trace the string. */ |
33 | if (n > -1 && n < size) { |
34 | ret = trace_user_generic_slow_printf_param_buffer(p, n+1); |
35 | free(p); |
36 | return ret; |
37 | } |
38 | /* Else try again with more space. */ |
39 | if (n > -1) /* glibc 2.1 */ |
40 | size = n+1; /* precisely what is needed */ |
41 | else /* glibc 2.0 */ |
42 | size *= 2; /* twice the old size */ |
43 | if ((np = realloc (p, size)) == NULL) { |
44 | free(p); |
45 | return -1; |
46 | } else { |
47 | p = np; |
48 | } |
49 | } |
50 | } |
51 | #endif //LTT_TRACE |
52 | |
53 | #endif //_LTT_FACILITY_CUSTOM_USER_GENERIC_H_ |