1 | /* Low-level statistical profiling support function. Stub version. |
2 | Copyright (C) 1995-2024 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) |
41 | |