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| author | Stan Cox <scox@redhat.com> | 2010-03-26 17:14:32 -0400 |
|---|---|---|
| committer | Stan Cox <scox@redhat.com> | 2010-03-26 17:14:32 -0400 |
| commit | b642c901a918a92fdd6b1167ed02dfe4c50cdd3e (patch) | |
| tree | d84a778e61848003cd48ea6b42db5614d8a26bae /includes | |
| parent | 7ad76102c4cd18e083ea74abd413332da55426d1 (diff) | |
| download | systemtap-steved-b642c901a918a92fdd6b1167ed02dfe4c50cdd3e.tar.gz systemtap-steved-b642c901a918a92fdd6b1167ed02dfe4c50cdd3e.tar.xz systemtap-steved-b642c901a918a92fdd6b1167ed02dfe4c50cdd3e.zip | |
Add kprobe user probe semaphore handling.
Adds stap_kprobe_process_found and stap_kprobe_mmap_found handlers
and then the task_finder uses those to set the semaphore values.
The probe adds user_path and user_lib which are used by the
task_finder to decide what object to sniff.
* sdt.h (STAP_SEMAPHORE): Also define for kprobes.
* tapsets.cxx (dwarf_derived_probe): Add user_path and user_lib.
(dwarf_derived_probe::join_group): Enable task finder for kprobes.
(dwarf_derived_probe::dwarf_derived_probe): Set user_path and
user_lib.
(dwarf_derived_probe_group::emit_module_decls): Emit
stap_kprobe_mmap_found, sdt_sem_offset, sdt_sem_address, pathname,
and finder declarations. Emit stap_kprobe_process_found and
stap_kprobe_mmap_found.
(dwarf_derived_probe_group::emit_module_init): Setup task finder.
(sdt_query::convert_location): Remove TOK_LIBRARY token.
(dwarf_builder::build): Set user_path and user_lib.
(kprobe_derived_probe): Add path and library.
(kprobe_builder::build): Get process and library params
Diffstat (limited to 'includes')
| -rw-r--r-- | includes/sys/sdt.h | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/includes/sys/sdt.h b/includes/sys/sdt.h index 39ebfb50..74906783 100644 --- a/includes/sys/sdt.h +++ b/includes/sys/sdt.h @@ -29,12 +29,12 @@ #define STAP_PROBE_DATA_(probe,guard,arg) \ __asm__ volatile (".section .probes," ALLOCSEC "\n" \ "\t.balign 8\n" \ - "1:\n\t.asciz " #probe "\n" \ - "\t.balign 4\n" \ + "1:\n\t.asciz " #probe "\n" \ + "\t.balign 4\n" \ "\t.int " #guard "\n" \ "\t.balign 8\n" \ - STAP_PROBE_ADDR("1b\n") \ - "\t.balign 8\n" \ + STAP_PROBE_ADDR("1b\n") \ + "\t.balign 8\n" \ STAP_PROBE_ADDR(#arg "\n") \ "\t.int 0\n" \ "\t.previous\n") @@ -42,7 +42,7 @@ #define STAP_PROBE_DATA(probe, guard, arg) \ STAP_PROBE_DATA_(#probe,guard,arg) -#if defined STAP_HAS_SEMAPHORES && ! defined EXPERIMENTAL_KPROBE_SDT +#if defined STAP_HAS_SEMAPHORES #define STAP_SEMAPHORE(probe) \ if (__builtin_expect ( probe ## _semaphore , 0)) #else |