Re: CVS commit: src

[Darran Hunt <darran%snark.us@localhost>]

Sure, try this one:

#pragma D option flowindent

fbt::syscall:entry
/execname == "sleep" && guard++ == 0/
{
        self->traceme = 1;
        printf("fd: %d", arg0);
}

fbt:::
/self->traceme/
{}

fbt::syscall:return
/self->traceme/
{
        self->traceme = 0;
        exit(0);
}

start the script running (e.g. dtrace -l flow.d), then do a sleep 1 in  
another shell.  You should get something like:

CPU FUNCTION
  0  -> syscall                               fd: 3425484104
  0   | syscall:entry
  0    -> sys_mmap
  0      -> pax_aslr
  0      <- pax_aslr
  0      -> uvm_mmap
  0        -> uvm_map
  0          -> vm_map_lock_try
  0          <- vm_map_lock_try
  0          -> uvm_map_findspace
  0            -> uvm_map_lookup_entry
  0            <- uvm_map_lookup_entry
  0            -> uvm_map_space_avail
  0            <- uvm_map_space_avail
  0            -> uvm_map_space_avail
  0            <- uvm_map_space_avail
  0          <- uvm_map_findspace
  0          -> uvm_map_enter
  0            -> pool_cache_get_paddr
  0            <- pool_cache_get_paddr
  0            -> uvm_rb_insert
  0              -> rb_tree_insert_node
  0                -> uvm_map_compare_nodes
  0                <- uvm_map_compare_nodes
  0                -> uvm_map_compare_nodes
  0                <- uvm_map_compare_nodes
  0                -> uvm_map_compare_nodes
  0                <- uvm_map_compare_nodes
  0                -> uvm_map_compare_nodes
  0                <- uvm_map_compare_nodes
  0                -> rb_tree_reparent_nodes
  0                <- rb_tree_reparent_nodes
  0              <- rb_tree_insert_node
  0              -> uvm_rb_fixup
  0              <- uvm_rb_fixup
  0              -> vm_map_unlock
  0              <- uvm_map_enter
  0            <- uvm_map
  0          <- uvm_mmap
  0        <- sys_mmap
  0       | syscall:return
  0      <- syscall

Regards,
Darran.

On 13/03/2010, at 12:11 PM, haad wrote:

> On Fri, Mar 12, 2010 at 10:53 PM, Darran Hunt <darran%netbsd.org@localhost>  
> wrote:
> > Module Name:    src
> > Committed By:   darran
> > Date:           Fri Mar 12 21:53:16 UTC 2010
> >
> > Modified Files:
> >        src/distrib/sets/lists/modules: mi
> >        src/external/cddl/osnet/dev/fbt: fbt.c
> >        src/external/cddl/osnet/dist/uts/common/dtrace: dtrace.c
> >        src/sys/modules/dtrace: Makefile
> >        src/sys/sys: module.h
> > Added Files:
> >        src/sys/modules/dtrace/fbt: Makefile
> >
> > Log Message:
> > DTrace: Add the Function Boundary Trace (FBT) provider moduile.  This
> > module  instruments every function in the kernel with entry and exit
> > probes.  These probes are true zero-effect probes in that they don't
> > exist in the code until they are enabled.  The probes are enabled by
> > directly patching the function entry and exit points to make jumps  
> > into
> > the dtrace framework.
> > This gives us over 29,000 trace points in the kernel.
>
> Nice do you have any example how this can be used :) ?
>
> > To generate a diff of this commit:
> > cvs rdiff -u -r1.11 -r1.12 src/distrib/sets/lists/modules/mi
> > cvs rdiff -u -r1.2 -r1.3 src/external/cddl/osnet/dev/fbt/fbt.c
> > cvs rdiff -u -r1.8 -r1.9 \
> >    src/external/cddl/osnet/dist/uts/common/dtrace/dtrace.c
> > cvs rdiff -u -r1.2 -r1.3 src/sys/modules/dtrace/Makefile
> > cvs rdiff -u -r0 -r1.1 src/sys/modules/dtrace/fbt/Makefile
> > cvs rdiff -u -r1.20 -r1.21 src/sys/sys/module.h
> >
> > Please note that diffs are not public domain; they are subject to the
> > copyright notices on the relevant files.
>
>
>
> --
>
>
> Regards.
>
> Adam