1. 16 7月, 2011 4 次提交
  2. 10 5月, 2011 1 次提交
  3. 06 4月, 2011 4 次提交
    • M
      perf probe: Fix listing incorrect line number with inline function · 1d46ea2a
      Masami Hiramatsu 提交于
      Fix a bug showing incorrect line number when a probe is put on the head of an
      inline function. This patch updates find_perf_probe_point() and introduces new
      rules to get correct line number.
      
       - If debuginfo doesn't have a correct file name, we shouldn't return line
         number too, because, without file name, line number is meaningless.
      
       - If the address is in a function, it stores the function name and the offset
         from the function entry.
      
         - If the address is on a line, it tries to get the relative line number from
           the function entry line, except for the address is same as the entry
           address of the function (in this case, the relative line number should
           be 0).
      
           - If the address is in an inline function entry (call-site), it uses the
             inline function call line number as the line on which the address is.
      
         - If the address is in an inline function body, it stores the inline
           function name and offset from the inline function call site instead of the
           (non-inlined) function.
      
      Cc: 2nddept-manager@sdl.hitachi.co.jp
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Lin Ming <ming.m.lin@intel.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      LKML-Reference: <20110330092605.2132.11629.stgit@ltc236.sdl.hitachi.co.jp>
      Signed-off-by: NMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      1d46ea2a
    • M
      perf probe: Fix to find recursively inlined function · 1d878083
      Masami Hiramatsu 提交于
      Fix die_find_inlinefunc() to return correct innermost inlined function
      at given address. Without this fix, it returns the outermost inlined
      function.
      
      Cc: 2nddept-manager@sdl.hitachi.co.jp
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Lin Ming <ming.m.lin@intel.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      LKML-Reference: <20110330092559.2132.78634.stgit@ltc236.sdl.hitachi.co.jp>
      Signed-off-by: NMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      1d878083
    • M
      perf probe: Fix to remove redundant close · f0c4801a
      Masami Hiramatsu 提交于
      Since dwfl_end() closes given fd with dwfl, caller doesn't need to close its fd
      when finishing process.
      
      Cc: 2nddept-manager@sdl.hitachi.co.jp
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Lin Ming <ming.m.lin@intel.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      LKML-Reference: <20110330092547.2132.93728.stgit@ltc236.sdl.hitachi.co.jp>
      Signed-off-by: NMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      f0c4801a
    • M
      perf probe: Fix to ensure function declared file · 7d21635a
      Masami Hiramatsu 提交于
      Fix to ensure function declared file matches given file name. This fixes
      a potential bug.
      
      As I've commented on Lin Ming's fastpath enhancement, decl_file should
      be checked on each probe point if user gives a probe point as func@file.
      
      Cc: 2nddept-manager@sdl.hitachi.co.jp
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Lin Ming <ming.m.lin@intel.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      LKML-Reference: <20110330092541.2132.3584.stgit@ltc236.sdl.hitachi.co.jp>
      Signed-off-by: NMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      7d21635a
  4. 30 3月, 2011 1 次提交
    • L
      perf probe: Add fastpath to do lookup by function name · cd25f8bc
      Lin Ming 提交于
      v3 -> v2:
      - Make pubname_search_cb more generic
      - Add fastpath to find_probes also
      
      v2 -> v1:
      - Don't compare file names with cu_find_realpath(...), instead, compare
        them with the name returned by dwarf_decl_file(sp_die)
      
      The vmlinux file may have thousands of CUs.
      We can lookup function name from .debug_pubnames section
      to avoid the slow loop on CUs.
      
      1. Improvement data for find_line_range
      
      ./perf stat -e cycles -r 10 -- ./perf probe -k /home/mlin/vmlinux \
              -s /home/mlin/linux-2.6 \
              --line csum_partial_copy_to_user > tmp.log
      
      before patch applied
      =====================
             847,988,276 cycles
      
              0.355075856  seconds time elapsed
      
      after patch applied
      =====================
             206,102,622 cycles
      
              0.086883555  seconds time elapsed
      
      2. Improvement data for find_probes
      
      ./perf stat -e cycles -r 10 -- ./perf probe -k /home/mlin/vmlinux \
              -s /home/mlin/linux-2.6 \
              --vars csum_partial_copy_to_user > tmp.log
      
      before patch applied
      =====================
             848,490,844 cycles
      
              0.355307901  seconds time elapsed
      
      after patch applied
      =====================
             205,684,469 cycles
      
              0.086694010  seconds time elapsed
      Acked-by: NMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: linux-kernel <linux-kernel@vger.kernel.org>
      LKML-Reference: <1301041668.14111.52.camel@minggr.sh.intel.com>
      Signed-off-by: NLin Ming <ming.m.lin@intel.com>
      Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      cd25f8bc
  5. 16 3月, 2011 1 次提交
    • I
      perf probe: Clean up probe_point_lazy_walker() return value · 5e814dd5
      Ingo Molnar 提交于
      Newer compilers (gcc 4.6) complains about:
      
              return ret < 0 ?: 0;
      
      For the following reason:
      
        util/probe-finder.c: In function ‘probe_point_lazy_walker’:
        util/probe-finder.c:1331:18: error: the omitted middle operand in ?: will always be ‘true’, suggest explicit middle operand [-Werror=parentheses]
      
      And indeed the return value is a somewhat obscure (but correct) value
      of 'true', so return 'ret' instead - this is cleaner and unconfuses
      GCC as well.
      
      Cc: Arnaldo Carvalho de Melo <acme@redhat.com>
      Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      LKML-Reference: <new-submission>
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      5e814dd5
  6. 22 2月, 2011 2 次提交
    • A
      perf probe: Remove redundant checks · 8635bf6e
      Arnaldo Carvalho de Melo 提交于
      While fixing an error propagating problem in f809b25 I added two
      redundant checks.
      
      I did that because I didn't expect the checks to be on the while and for
      loop condition expression, where they are tested before we run the loop,
      where the 'ret' variable is set.
      
      So remove it from there and leave it just after it is actually set,
      eliminating unneded tests.
      Reported-by: NMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      LKML-Reference: <new-submission>
      Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      8635bf6e
    • A
      perf probe: Fix error propagation leading to segfault · fbee632d
      Arnaldo Carvalho de Melo 提交于
      There are two hunks in this patch that stops probe processing as soon as one
      error is found, breaking out of loops, the other fix an error propagation that
      should return a negative error number but instead was returning the result of
      "ret < 0", which is 1 and thus made several error checks fail because they test
      agains < 0.
      
      The problem could be triggered by asking for a variable that was optimized out,
      fact that should stop the whole probe processing but instead was segfaulting
      while installing broken probes:
      
      [root@emilia ~]# probe perf_mmap:55 user_lock_limit
      Failed to find the location of user_lock_limit at this address.
       Perhaps, it has been optimized out.
      Failed to find 'user_lock_limit' in this function.
      Add new events:
        probe:perf_mmap      (on perf_mmap:55 with user_lock_limit)
        probe:perf_mmap_1    (on perf_mmap:55 with user_lock_limit)
      Segmentation fault (core dumped)
      [root@emilia ~]# perf probe -l
        probe:perf_mmap      (on perf_mmap:55@git/linux/kernel/perf_event.c with user_lock_limit)
        probe:perf_mmap_1    (on perf_mmap:55@git/linux/kernel/perf_event.c with user_lock_limit)
      [root@emilia ~]#
      
      After the fix:
      
      [root@emilia ~]# probe perf_mmap:55 user_lock_limit
      Failed to find the location of user_lock_limit at this address.
       Perhaps, it has been optimized out.
      Failed to find 'user_lock_limit' in this function.
        Error: Failed to add events. (-2)
      [root@emilia ~]#
      
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Stephane Eranian <eranian@google.com>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      LKML-Reference: <new-submission>
      Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      fbee632d
  7. 07 2月, 2011 2 次提交
  8. 24 1月, 2011 2 次提交
    • M
      perf probe: Enable to put probe inline function call site · 5069ed86
      Masami Hiramatsu 提交于
      Enable to put probe inline function call site. This will increase line-based
      probe-ability.
      
      <Without this patch>
      $ ./perf probe -L schedule:48
      <schedule:48>
                      pre_schedule(rq, prev);
      
           50         if (unlikely(!rq->nr_running))
                              idle_balance(cpu, rq);
      
                      put_prev_task(rq, prev);
                      next = pick_next_task(rq);
      
           56         if (likely(prev != next)) {
                              sched_info_switch(prev, next);
                              trace_sched_switch_out(prev, next);
                              perf_event_task_sched_out(prev, next);
      
      <With this patch>
      $ ./perf probe -L schedule:48
      <schedule:48>
           48         pre_schedule(rq, prev);
      
           50         if (unlikely(!rq->nr_running))
           51                 idle_balance(cpu, rq);
      
           53         put_prev_task(rq, prev);
           54         next = pick_next_task(rq);
      
           56         if (likely(prev != next)) {
           57                 sched_info_switch(prev, next);
           58                 trace_sched_switch_out(prev, next);
           59                 perf_event_task_sched_out(prev, next);
      
      Cc: 2nddept-manager@sdl.hitachi.co.jp
      Cc: Franck Bui-Huu <fbuihuu@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      LKML-Reference: <20110113124604.22426.48873.stgit@ltc236.sdl.hitachi.co.jp>
      Signed-off-by: NMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      5069ed86
    • M
      perf probe: Introduce lines walker interface · 4cc9cec6
      Masami Hiramatsu 提交于
      Introduce die_walk_lines() for walking on the line list of given die, and use
      it in line_range finder and probe point finder.
      
      Cc: 2nddept-manager@sdl.hitachi.co.jp
      Cc: Franck Bui-Huu <fbuihuu@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      LKML-Reference: <20110113124558.22426.48170.stgit@ltc236.sdl.hitachi.co.jp>
      Signed-off-by: NMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      [ committer note: s/%ld/%zd/ for a size_t nlines var that broke f14 x86 build]
      Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      4cc9cec6
  9. 22 12月, 2010 2 次提交
    • M
      perf probe: Fix to support libdwfl older than 0.148 · 3b4694de
      Masami Hiramatsu 提交于
      Since the libdwfl library before 0.148 fails to analyze live kernel debuginfo,
      'perf probe --list' compiled with those old libdwfl sometimes crashes.
      
      To avoid that bug, perf probe does not use libdwfl's live kernel analysis
      routine when it is compiled with older libdwfl.
      
      Side effect: perf with older libdwfl doesn't support listing probe in modules
      with source code line. Those could be shown by symbol+offset.
      
      Cc: 2nddept-manager@sdl.hitachi.co.jp
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      LKML-Reference: <20101217131218.24123.62424.stgit@ltc236.sdl.hitachi.co.jp>
      Signed-off-by: NMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      3b4694de
    • M
      perf probe: Cleanup messages · 0e43e5d2
      Masami Hiramatsu 提交于
      Add new lines for error or debug messages, change dwarf related words to more
      generic words (or just removed).
      
      Cc: 2nddept-manager@sdl.hitachi.co.jp
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      LKML-Reference: <20101217131211.24123.40437.stgit@ltc236.sdl.hitachi.co.jp>
      Signed-off-by: NMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      0e43e5d2
  10. 24 10月, 2010 1 次提交
  11. 22 10月, 2010 6 次提交
    • M
      perf probe: Add basic module support · 469b9b88
      Masami Hiramatsu 提交于
      Add basic module probe support on perf probe. This introduces "--module
      <MODNAME>" option to perf probe for putting probes and showing lines and
      variables in the given module.
      
      Currently, this supports only probing on running modules.  Supporting off-line
      module probing is the next step.
      
      e.g.)
      [show lines]
       # ./perf probe --module drm -L drm_vblank_info
      <drm_vblank_info:0>
            0  int drm_vblank_info(struct seq_file *m, void *data)
            1  {
                      struct drm_info_node *node = (struct drm_info_node *) m->private
            3         struct drm_device *dev = node->minor->dev;
       ...
      [show vars]
       # ./perf probe --module drm -V drm_vblank_info:3
      Available variables at drm_vblank_info:3
              @<drm_vblank_info+20>
                      (unknown_type)  data
                      struct drm_info_node*   node
                      struct seq_file*        m
      [put a probe]
       # ./perf probe --module drm drm_vblank_info:3 node m
      Add new event:
        probe:drm_vblank_info (on drm_vblank_info:3 with node m)
      
      You can now use it on all perf tools, such as:
      
              perf record -e probe:drm_vblank_info -aR sleep 1
      [list probes]
       # ./perf probe -l
      probe:drm_vblank_info (on drm_vblank_info:3@drivers/gpu/drm/drm_info.c with ...
      
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      LKML-Reference: <20101021101341.3542.71638.stgit@ltc236.sdl.hitachi.co.jp>
      Signed-off-by: NMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      469b9b88
    • M
      perf probe: Show accessible global variables · fb8c5a56
      Masami Hiramatsu 提交于
      Add --externs for allowing --vars to show accessible global (externally
      defined) variables from a given probe point too.
      
      This will give you a hint which globals can be accessible from the probe point.
      
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      LKML-Reference: <20101021101335.3542.31003.stgit@ltc236.sdl.hitachi.co.jp>
      Signed-off-by: NMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      fb8c5a56
    • M
      perf probe: Show accessible local variables · cf6eb489
      Masami Hiramatsu 提交于
      Add -V (--vars) option for listing accessible local variables at given probe
      point. This will help finding which local variables are available for event
      arguments.
      
      e.g.)
       # perf probe -V call_timer_fn:23
       Available variables at call_timer_fn:23
               @<run_timer_softirq+345>
                       function_type*  fn
                       int     preempt_count
                       long unsigned int       data
                       struct list_head        work_list
                       struct list_head*       head
                       struct timer_list*      timer
                       struct tvec_base*       base
      
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      LKML-Reference: <20101021101323.3542.40282.stgit@ltc236.sdl.hitachi.co.jp>
      Signed-off-by: NMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      cf6eb489
    • M
      perf probe: Support global variables · 632941c4
      Masami Hiramatsu 提交于
      Allow users to set external defined global variables as event arguments (e.g.
      jiffies).
      
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Ingo Molnar <mingo@elte.hu>
      LKML-Reference: <20101021101316.3542.1999.stgit@ltc236.sdl.hitachi.co.jp>
      Signed-off-by: NMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      632941c4
    • M
      perf probe: Fix local variable searching loop · 378eeaad
      Masami Hiramatsu 提交于
      Fix to check the die's address and search into the die only if it has given
      address.
      
      This will avoid finding wrong variables in wrong basic block.
      
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Ingo Molnar <mingo@elte.hu>
      LKML-Reference: <20101021101309.3542.46434.stgit@ltc236.sdl.hitachi.co.jp>
      Signed-off-by: NMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      378eeaad
    • M
      perf probe: Fix type searching · 4046b8bb
      Masami Hiramatsu 提交于
      Fix to get the actual type die of variables by using dwarf_attr_integrate()
      which gets attribute from die even if the type die is connected by
      DW_AT_abstract_origin.
      
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Ingo Molnar <mingo@elte.hu>
      LKML-Reference: <20101021101302.3542.38549.stgit@ltc236.sdl.hitachi.co.jp>
      Signed-off-by: NMasami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
      Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      4046b8bb
  12. 08 9月, 2010 2 次提交
  13. 07 8月, 2010 1 次提交
  14. 06 8月, 2010 1 次提交
  15. 30 7月, 2010 1 次提交
    • S
      perf probe: Rename common fields/functions from kprobe to probe. · 0e60836b
      Srikar Dronamraju 提交于
      As a precursor for perf to support uprobes, rename fields/functions
      that had kprobe in their name but can be shared across perf-kprobes
      and perf-uprobes to probe.
      
      Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Cc: Christoph Hellwig <hch@infradead.org>
      Cc: "Frank Ch. Eigler" <fche@redhat.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Jim Keniston <jkenisto@linux.vnet.ibm.com>
      Cc: Linus Torvalds <torvalds@linux-foundation.org>
      Cc: Mark Wielaard <mjw@redhat.com>
      Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
      Cc: Naren A Devaiah <naren.devaiah@in.ibm.com>
      Cc: Oleg Nesterov <oleg@redhat.com>
      Cc: "Paul E. McKenney" <paulmck@linux.vnet.ibm.com>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Randy Dunlap <rdunlap@xenotime.net>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      LKML-Reference: <20100729141351.GG21723@linux.vnet.ibm.com>
      Signed-off-by: NSrikar Dronamraju <srikar@linux.vnet.ibm.com>
      Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      0e60836b
  16. 16 7月, 2010 3 次提交
  17. 06 7月, 2010 3 次提交
    • M
      perf probe: Support static and global variables · b7dcb857
      Masami Hiramatsu 提交于
      Add static and global variables support to perf probe.
      This allows user to trace non-local variables (and
      structure members) at probe points.
      
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      LKML-Reference: <20100519195749.2885.17451.stgit@localhost6.localdomain6>
      Signed-off-by: NMasami Hiramatsu <mhiramat@redhat.com>
      Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      b7dcb857
    • M
      perf probe: Support tracing an entry of array · b2a3c12b
      Masami Hiramatsu 提交于
      Add array-entry tracing support to perf probe. This enables to trace an entry
      of array which is indexed by constant value, e.g. array[0].
      
      For example:
      
        $ perf probe -a 'bio_split bi->bi_io_vec[0]'
      
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      LKML-Reference: <20100519195742.2885.5344.stgit@localhost6.localdomain6>
      Signed-off-by: NMasami Hiramatsu <mhiramat@redhat.com>
      Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      b2a3c12b
    • M
      perf probe: Support "string" type · 73317b95
      Masami Hiramatsu 提交于
      Support string type casting to event argument. If perf-probe finds an argument
      casted as string, it ensures the target variable is "(unsigned/signed) char
      *(or []). perf-probe also adds dereference if the target is a pointer.
      
      So, both of 'char buf[10];' and 'char *buf;' can be accessed by 'buf:string'
      
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      LKML-Reference: <20100519195734.2885.1666.stgit@localhost6.localdomain6>
      Signed-off-by: NMasami Hiramatsu <mhiramat@redhat.com>
      Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      73317b95
  18. 17 6月, 2010 1 次提交
    • C
      perf probe: Add kernel source path option · 9ed7e1b8
      Chase Douglas 提交于
      The probe plugin requires access to the source code for some operations.  The
      source code must be in the exact same location as specified by the DWARF tags,
      but sometimes the location is an absolute path that cannot be replicated by a
      normal user. This change adds the -s|--source option to allow the user to
      specify the root of the kernel source tree.
      
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Masami Hiramatsu <mhiramat@redhat.com>
      LKML-Reference: <1276543590-10486-1-git-send-email-chase.douglas@canonical.com>
      Signed-off-by: NChase Douglas <chase.douglas@canonical.com>
      Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      9ed7e1b8
  19. 19 5月, 2010 1 次提交
    • A
      perf probe: Fix some error exit paths · b448c4b6
      Arnaldo Carvalho de Melo 提交于
      That could leave filedescriptors open and leak memory. Also stop using
      xmalloc, use malloc and handle results just like other error cases in
      the same routine that used it.
      
      Cc: Frédéric Weisbecker <fweisbec@gmail.com>
      Cc: Masami Hiramatsu <mhiramat@redhat.com>
      Cc: Mike Galbraith <efault@gmx.de>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      LKML-Reference: <new-submission>
      Signed-off-by: NArnaldo Carvalho de Melo <acme@redhat.com>
      b448c4b6
  20. 18 5月, 2010 1 次提交