dtrace discuss - Sep 2009 - DTrace dumps core with dtrace -n 'pid3524:::*read* {}'

Hi all,
I ran the following one-liner, dtrace -n ''pid3524:::*read* {}''
and dtrace
dumped core. Of course the intention was to place ''*read*'' as
probefunc.
Shouldn''t dtrace be exiting gracefully, even if this means searching
through
all instructions of the process being traced?

krish at trantor:~/D-scripts# pstack core
core ''core'' of 3621:    dtrace -n pid3524:::*read* {}
 fffffd7ffb520f92 dt_getbyte () + 12
 fffffd7ffb4ddbff dtrace_get_SIB () + 2f
 fffffd7ffb4ddc82 dtrace_get_modrm () + 32
 fffffd7ffb4dfbc8 dtrace_disx86 () + 1c00
 fffffd7ffb521056 dt_instr_size () + 66
 fffffd7ffb5204c8 dt_pid_has_jump_table () + 78
 fffffd7ffb520d8f dt_pid_create_glob_offset_probes () + 87
 fffffd7ffb511514 dt_pid_per_sym () + 1a4
 fffffd7ffb51188d dt_pid_sym_filt () + cd
 fffffd7ffc08568f Psymbol_iter_com () + 2bf
 fffffd7ffc085902 Psymbol_iter_by_addr () + 2a
 fffffd7ffb511a3f dt_pid_per_mod () + 17f
 fffffd7ffb511c68 dt_pid_mod_filt () + a8
 fffffd7ffc0851a1 i_Pobject_iter () + 71
 fffffd7ffc08523c Pobject_iter () + 14
 fffffd7ffb511fcd dt_pid_create_pid_probes () + 1dd
 fffffd7ffb512622 dt_pid_create_probes () + 16a
 fffffd7ffb4e88f6 dt_setcontext () + 6e
 fffffd7ffb4e84f4 dt_compile_one_clause () + 34
 fffffd7ffb4e87ce dt_compile_clause () + 2e
 fffffd7ffb4ea09d dt_compile () + 46d
 fffffd7ffb4ea3de dtrace_program_strcompile () + 26
 0000000000404d40 compile_str () + 40
 00000000004070de main () + bde
 00000000004034bc ???????? ()

Hi Krish,

Oops. Yes, there seems to be a bit of an issue here so thanks
for flagging it. I''ll follow up offline with you.

Jon.
> Hi all,
> I ran the following one-liner, dtrace -n ''pid3524:::*read*
{}'' and dtrace
> dumped core. Of course the intention was to place
''*read*'' as probefunc.
> Shouldn''t dtrace be exiting gracefully, even if this means
searching
> through
> all instructions of the process being traced?
> 
> krish at trantor:~/D-scripts# pstack core
> core ''core'' of 3621:    dtrace -n pid3524:::*read* {}
> fffffd7ffb520f92 dt_getbyte () + 12
> fffffd7ffb4ddbff dtrace_get_SIB () + 2f
> fffffd7ffb4ddc82 dtrace_get_modrm () + 32
> fffffd7ffb4dfbc8 dtrace_disx86 () + 1c00
> fffffd7ffb521056 dt_instr_size () + 66
> fffffd7ffb5204c8 dt_pid_has_jump_table () + 78
> fffffd7ffb520d8f dt_pid_create_glob_offset_probes () + 87
> fffffd7ffb511514 dt_pid_per_sym () + 1a4
> fffffd7ffb51188d dt_pid_sym_filt () + cd
> fffffd7ffc08568f Psymbol_iter_com () + 2bf
> fffffd7ffc085902 Psymbol_iter_by_addr () + 2a
> fffffd7ffb511a3f dt_pid_per_mod () + 17f
> fffffd7ffb511c68 dt_pid_mod_filt () + a8
> fffffd7ffc0851a1 i_Pobject_iter () + 71
> fffffd7ffc08523c Pobject_iter () + 14
> fffffd7ffb511fcd dt_pid_create_pid_probes () + 1dd
> fffffd7ffb512622 dt_pid_create_probes () + 16a
> fffffd7ffb4e88f6 dt_setcontext () + 6e
> fffffd7ffb4e84f4 dt_compile_one_clause () + 34
> fffffd7ffb4e87ce dt_compile_clause () + 2e
> fffffd7ffb4ea09d dt_compile () + 46d
> fffffd7ffb4ea3de dtrace_program_strcompile () + 26
> 0000000000404d40 compile_str () + 40
> 00000000004070de main () + bde
> 00000000004034bc ???????? ()
> 
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