| 1 | /* Low-level statistical profiling support function. Stub version. |
|---|
| 2 | Copyright (C) 1995-2022 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 | |
|---|
