BSD syscall#176
svc · unix #176
add_profil
Adds an additional PC-sampling region to an existing profil(2) session.
Prototype
int add_profil(short *bufbase, size_t bufsize, u_long pcoffset, u_int pcscale);Returns: int
Arguments
| Name | Type | Dir | Description |
|---|---|---|---|
| bufbase | short | - | |
| bufsize | size_t | - | |
| pcoffset | u_long | - | |
| pcscale | u_int | - |
Version history
| XNU tag | macOS | # |
|---|---|---|
| xnu-1456.1.26 | macOS 10.6 Snow Leopard | 176 |
| xnu-1699.24.8 | macOS 10.7 Lion | 176 |
| xnu-1486.2.11 | — | 176 |
| xnu-1504.15.3 | — | 176 |
| xnu-1504.3.12 | — | 176 |
| xnu-1504.7.4 | — | 176 |
| xnu-1504.9.17 | — | 176 |
| xnu-1504.9.26 | — | 176 |
| xnu-1504.9.37 | — | 176 |
| xnu-1699.22.73 | — | 176 |
| xnu-1699.22.81 | — | 176 |
| xnu-1699.24.23 | — | 176 |
| xnu-1699.26.8 | — | 176 |
| xnu-1699.32.7 | — | 176 |
Notes
add_profil(2) lets a profiler describe multiple address ranges (typically dynamically loaded modules) so that samples landing in those ranges are bucketed into separate histograms. Like profil(2) it is a historical curiosity on macOS — modern tooling uses kperf, kdebug or DTrace.
Related APIs
profilkperfkdebugDTrace