MFC r258311

opensolaris/uts/common/dtrace/fasttrap.c
        Fix several problems that can cause panics on kldload and kldunload.

        * kproc_create(fasttrap_pid_cleanup_cb, ...) gets called before
          fasttrap_provs.fth_table gets allocated.  This can lead to a panic
          on module load, because fasttrap_pid_cleanup_cb references
          fasttrap_provs.fth_table.  Move kproc_create down after the point
          that fasttrap_provs.fth_table gets allocated, and modify the error
          handling accordingly.

        * dtrace_fasttrap_{fork,exec,exit} weren't getting NULLed until
          after fasttrap_provs.fth_table got freed.  That caused panics on
          module unload because fasttrap_exec_exit calls
          fasttrap_provider_retire, which references
          fasttrap_provs.fth_table.  NULL those function pointers earlier.

        * There wasn't any code to destroy the
          fasttrap_{tpoints,provs,procs}.fth_table mutexes on module unload,
          leading to a resource leak when WITNESS is enabled.  Destroy those
          mutexes during fasttrap_unload().

Sponsored by:	Spectra Logic Corporation

0 files changed, 0 insertions, 0 deletions