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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 | |
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11 | #ifdef __cplusplus |
12 | extern "C" { |
13 | #endif |
14 | |
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15 | static int trace_user_generic_slow_printf( |
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16 | const char *fmt, ...) |
17 | #ifndef LTT_TRACE |
18 | { |
19 | } |
20 | #else |
21 | { |
22 | /* Guess we need no more than 100 bytes. */ |
23 | int n, size = 100; |
24 | char *p, *np; |
25 | va_list ap; |
26 | int ret; |
27 | |
28 | if ((p = malloc (size)) == NULL) |
29 | return -1; |
30 | |
31 | while (1) { |
32 | /* Try to print in the allocated space. */ |
33 | va_start(ap, fmt); |
34 | n = vsnprintf (p, size, fmt, ap); |
35 | va_end(ap); |
36 | /* If that worked, trace the string. */ |
37 | if (n > -1 && n < size) { |
38 | ret = trace_user_generic_slow_printf_param_buffer(p, n+1); |
39 | free(p); |
40 | return ret; |
41 | } |
42 | /* Else try again with more space. */ |
43 | if (n > -1) /* glibc 2.1 */ |
44 | size = n+1; /* precisely what is needed */ |
45 | else /* glibc 2.0 */ |
46 | size *= 2; /* twice the old size */ |
47 | if ((np = realloc (p, size)) == NULL) { |
48 | free(p); |
49 | return -1; |
50 | } else { |
51 | p = np; |
52 | } |
53 | } |
54 | } |
55 | #endif //LTT_TRACE |
56 | |
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57 | #ifdef __cplusplus |
58 | } /* end of extern "C" */ |
59 | #endif |
60 | |
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61 | #endif //_LTT_FACILITY_CUSTOM_USER_GENERIC_H_ |