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1 | /* Low-level statistical profiling support function. Stub version. | |
2 | Copyright (C) 1995-2019 Free Software Foundation, Inc. | |
3 | This file is part of the GNU C Library. | |
4 | ||
5 | The GNU C Library is free software; you can redistribute it and/or | |
6 | modify it under the terms of the GNU Lesser General Public | |
7 | License as published by the Free Software Foundation; either | |
8 | version 2.1 of the License, or (at your option) any later version. | |
9 | ||
10 | The GNU C Library is distributed in the hope that it will be useful, | |
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
13 | Lesser General Public License for more details. | |
14 | ||
15 | You should have received a copy of the GNU Lesser General Public | |
16 | License along with the GNU C Library; if not, see | |
17 | <https://www.gnu.org/licenses/>. */ | |
18 | ||
19 | #include <sys/types.h> | |
20 | #include <unistd.h> | |
21 | #include <errno.h> | |
22 | ||
23 | /* Enable statistical profiling, writing samples of the PC into at most | |
24 | SIZE bytes of SAMPLE_BUFFER; every processor clock tick while profiling | |
25 | is enabled, the system examines the user PC and increments | |
26 | SAMPLE_BUFFER[((PC - OFFSET) / 2) * SCALE / 65536]. If SCALE is zero, | |
27 | disable profiling. Returns zero on success, -1 on error. */ | |
28 | ||
29 | int | |
30 | __profil (u_short *sample_buffer, size_t size, size_t offset, u_int scale) | |
31 | { | |
32 | if (scale == 0) | |
33 | /* Disable profiling. */ | |
34 | return 0; | |
35 | ||
36 | __set_errno (ENOSYS); | |
37 | return -1; | |
38 | } | |
39 | weak_alias (__profil, profil) | |
40 | stub_warning (profil) |