diff options
Diffstat (limited to 'sys/compat/linux/linux_emul.h')
| -rw-r--r-- | sys/compat/linux/linux_emul.h | 43 |
1 files changed, 36 insertions, 7 deletions
diff --git a/sys/compat/linux/linux_emul.h b/sys/compat/linux/linux_emul.h index 3acde64..f409a34 100644 --- a/sys/compat/linux/linux_emul.h +++ b/sys/compat/linux/linux_emul.h @@ -64,13 +64,42 @@ struct linux_emuldata { struct linux_emuldata *em_find(struct proc *, int locked); -#define EMUL_LOCK(l) mtx_lock(l) -#define EMUL_UNLOCK(l) mtx_unlock(l) - -#define EMUL_SHARED_RLOCK(l) sx_slock(l) -#define EMUL_SHARED_RUNLOCK(l) sx_sunlock(l) -#define EMUL_SHARED_WLOCK(l) sx_xlock(l) -#define EMUL_SHARED_WUNLOCK(l) sx_xunlock(l) +/* + * DTrace probes for locks should be fired after locking and before releasing + * to prevent races (to provide data/function stability in dtrace, see the + * output of "dtrace -v ..." and the corresponding dtrace docs). + */ +#define EMUL_LOCK(l) do { \ + mtx_lock(l); \ + LIN_SDT_PROBE1(locks, emul_lock, \ + locked, l); \ + } while (0) +#define EMUL_UNLOCK(l) do { \ + LIN_SDT_PROBE1(locks, emul_lock, \ + unlock, l); \ + mtx_unlock(l); \ + } while (0) + +#define EMUL_SHARED_RLOCK(l) do { \ + sx_slock(l); \ + LIN_SDT_PROBE1(locks, emul_shared_rlock, \ + locked, l); \ + } while (0) +#define EMUL_SHARED_RUNLOCK(l) do { \ + LIN_SDT_PROBE1(locks, emul_shared_rlock, \ + unlock, l); \ + sx_sunlock(l); \ + } while (0) +#define EMUL_SHARED_WLOCK(l) do { \ + sx_xlock(l); \ + LIN_SDT_PROBE1(locks, emul_shared_wlock, \ + locked, l); \ + } while (0) +#define EMUL_SHARED_WUNLOCK(l) do { \ + LIN_SDT_PROBE1(locks, emul_shared_wlock, \ + unlock, l); \ + sx_xunlock(l); \ + } while (0) /* for em_find use */ #define EMUL_DOLOCK 1 |
