1. 26 Aug, 2009 2 commits
    • Masami Hiramatsu's avatar
      tracing: Ftrace dynamic ftrace_event_call support · bd1a5c84
      Masami Hiramatsu authored
      Add dynamic ftrace_event_call support to ftrace. Trace engines can add
      new ftrace_event_call to ftrace on the fly. Each operator function of
      the call takes an ftrace_event_call data structure as an argument,
      because these functions may be shared among several ftrace_event_calls.
      
      Changes from v13:
       - Define remove_subsystem_dir() always (revirt a2ca5e03), because
         trace_remove_event_call() uses it.
       - Modify syscall tracer because of ftrace_event_call change.
      
      [fweisbec@gmail.com: Fixed conflict against latest tracing/core]
      Signed-off-by: default avatarMasami Hiramatsu <mhiramat@redhat.com>
      Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
      Cc: Avi Kivity <avi@redhat.com>
      Cc: Andi Kleen <ak@linux.intel.com>
      Cc: Christoph Hellwig <hch@infradead.org>
      Cc: Frank Ch. Eigler <fche@redhat.com>
      Cc: H. Peter Anvin <hpa@zytor.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Jason Baron <jbaron@redhat.com>
      Cc: Jim Keniston <jkenisto@us.ibm.com>
      Cc: K.Prasad <prasad@linux.vnet.ibm.com>
      Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
      Cc: Li Zefan <lizf@cn.fujitsu.com>
      Cc: Przemysław Pawełczyk <przemyslaw@pawelczyk.it>
      Cc: Roland McGrath <roland@redhat.com>
      Cc: Sam Ravnborg <sam@ravnborg.org>
      Cc: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Tom Zanussi <tzanussi@gmail.com>
      Cc: Vegard Nossum <vegard.nossum@gmail.com>
      LKML-Reference: <20090813203453.31965.71901.stgit@localhost.localdomain>
      Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      bd1a5c84
    • Li Zefan's avatar
      tracing/filters: Add __field_ext() to TRACE_EVENT · 43b51ead
      Li Zefan authored
      Add __field_ext(), so a field can be assigned to a specific
      filter_type, which matches a corresponding filter function.
      
      For example, a later patch will allow this:
      	__field_ext(const char *, str, FILTER_PTR_STR);
      Signed-off-by: default avatarLi Zefan <lizf@cn.fujitsu.com>
      LKML-Reference: <4A7B9272.60507095@cn.fujitsu.com>
      
      [
        Fixed a -1 to FILTER_OTHER
        Forward ported to latest kernel.
      ]
      Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
      43b51ead
  2. 25 Aug, 2009 1 commit
    • Josh Stone's avatar
      tracing: Create generic syscall TRACE_EVENTs · 1c569f02
      Josh Stone authored
      This converts the syscall_enter/exit tracepoints into TRACE_EVENTs, so
      you can have generic ftrace events that capture all system calls with
      arguments and return values.  These generic events are also renamed to
      sys_enter/exit, so they're more closely aligned to the specific
      sys_enter_foo events.
      Signed-off-by: default avatarJosh Stone <jistone@redhat.com>
      Cc: Jason Baron <jbaron@redhat.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Li Zefan <lizf@cn.fujitsu.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
      Cc: Jiaying Zhang <jiayingz@google.com>
      Cc: Martin Bligh <mbligh@google.com>
      Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
      Cc: Paul Mundt <lethal@linux-sh.org>
      Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
      Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
      LKML-Reference: <1251150194-1713-5-git-send-email-jistone@redhat.com>
      Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      1c569f02
  3. 20 Aug, 2009 1 commit
    • Li Zefan's avatar
      tracing/syscalls: Fix the output of syscalls with no arguments · 4539f077
      Li Zefan authored
      Before:
      
        # echo 1 > events/syscalls/sys_enter_sync/enable
        # cat events/syscalls/sys_enter_sync/format
        ...
              field:int nr;   offset:12;      size:4;
      
        print fmt: "# sync
        # cat trace
        ...
                  sync-8950  [000]  2366.087670: sys_sync(
      
      After:
      
        # echo 1 > events/syscalls/sys_enter_sync/enable
        # cat events/syscalls/sys_enter_sync/format
        ...
              field:int nr;   offset:12;      size:4;
      
        print fmt: ""
        # sync
        # cat trace
                  sync-2134  [001]   136.780735: sys_sync()
      Reported-by: default avatarMasami Hiramatsu <mhiramat@redhat.com>
      Signed-off-by: default avatarLi Zefan <lizf@cn.fujitsu.com>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Jason Baron <jbaron@redhat.com>
      Cc: Masami Hiramatsu <mhiramat@redhat.com>
      LKML-Reference: <4A8D05AF.20103@cn.fujitsu.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      4539f077
  4. 19 Aug, 2009 3 commits
    • Li Zefan's avatar
      tracing/syscalls: Add filtering support · 540b7b8d
      Li Zefan authored
      Add filtering support for syscall events:
      
       # echo 'mode == 0666' > events/syscalls/sys_enter_open
       # echo 'ret == 0' > events/syscalls/sys_exit_open
       # echo 1 > events/syscalls/sys_enter_open
       # echo 1 > events/syscalls/sys_exit_open
       # cat trace
       ...
         modprobe-3084 [001] 117.463140: sys_open(filename: 917d3e8, flags: 0, mode: 1b6)
         modprobe-3084 [001] 117.463176: sys_open -> 0x0
             less-3086 [001] 117.510455: sys_open(filename: 9c6bdb8, flags: 8000, mode: 1b6)
         sendmail-2574 [001] 122.145840: sys_open(filename: b807a365, flags: 0, mode: 1b6)
       ...
      Signed-off-by: default avatarLi Zefan <lizf@cn.fujitsu.com>
      Cc: Jason Baron <jbaron@redhat.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      LKML-Reference: <4A8BAFCB.1040006@cn.fujitsu.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      540b7b8d
    • Li Zefan's avatar
      tracing/syscalls: Add fields format for exit events · 10a5b66f
      Li Zefan authored
      Add "format" file for syscall exit events:
      
       # cat events/syscalls/sys_exit_open/format
       name: sys_exit_open
       ID: 344
       format:
               field:unsigned short common_type;       offset:0;       size:2;
               field:unsigned char common_flags;       offset:2;       size:1;
               field:unsigned char common_preempt_count;       offset:3;       size:1;
               field:int common_pid;   offset:4;       size:4;
               field:int common_tgid;  offset:8;       size:4;
      
               field:int nr;   offset:12;      size:4;
               field:unsigned long ret;        offset:16;      size:4;
      Signed-off-by: default avatarLi Zefan <lizf@cn.fujitsu.com>
      Cc: Jason Baron <jbaron@redhat.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      LKML-Reference: <4A8BAF61.3060307@cn.fujitsu.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      10a5b66f
    • Li Zefan's avatar
      tracing/syscalls: Fix fields format for enter events · e6971969
      Li Zefan authored
      The "format" file of a trace event is originally for parsers to
      parse ftrace binary output.
      
      But the "format" file of a syscall event can only be used by
      perfcounter, because it describes the format of struct
      syscall_enter_record not struct syscall_trace_enter.
      
      To fix this, we remove struct syscall_enter_record, and then
      struct syscall_trace_enter will be used by both perf profile
      and ftrace.
      Signed-off-by: default avatarLi Zefan <lizf@cn.fujitsu.com>
      Cc: Jason Baron <jbaron@redhat.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      LKML-Reference: <4A8BAF39.1030404@cn.fujitsu.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      e6971969
  5. 17 Aug, 2009 1 commit
    • Li Zefan's avatar
      tracing/syscalls: Fix to print parameter types · ba8b3a40
      Li Zefan authored
      When syscall tracing was implemented as a tracer,
      "syscall_arg_type" trace option could be set to enable the
      display of syscall parameter types.
      
      Now this option is gone since it's no longer a tracer, but the
      code is still there but dead.
      
      So we remove dead code and re-enable the printing of paramete
      types via the verbose option:
      
        # echo verbose > trace_options
        # echo syscalls > set_event
        # cat trace
      	...
              bash-3331  [000]    95.348937: sys_fcntl64 -> 0x1
              bash-3331  [000]    95.348942: sys_close(unsigned int fd: a)
      	...
      Signed-off-by: default avatarLi Zefan <lizf@cn.fujitsu.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      Cc: Jason Baron <jbaron@redhat.com>
      LKML-Reference: <4A891AF6.5050102@cn.fujitsu.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      ba8b3a40
  6. 11 Aug, 2009 6 commits
    • Frederic Weisbecker's avatar
      tracing: Support for syscall events raw records in perfcounters · 19007a67
      Frederic Weisbecker authored
      This bring the support for raw syscall events in perfcounters.
      The arguments or exit value are saved as a raw sample using
      the PERF_SAMPLE_RAW attribute in a perf counter.
      
      Example (for now you must explicitly set the PERF_SAMPLE_RAW flag
      in perf record):
      
      perf record -e syscalls:sys_enter_open -f -F 1 -a
      perf report -D
      
      	0x2cbb8 [0x50]: event: 9
      	.
      	. ... raw event: size 80 bytes
      	.  0000:  09 00 00 00 02 00 50 00 20 e9 39 ab 0a 7f 00 00  ......P. .9....
      	.  0010:  bc 14 00 00 bc 14 00 00 01 00 00 00 00 00 00 00  ...............
      	.  0020:  2c 00 00 00 15 01 01 00 bc 14 00 00 bc 14 00 00  ,..............
                        ^  ^  ^  ^  ^  ^  ^  ..........................
                        Event Size  struct trace_entry
      
      	.  0030:  00 00 00 00 46 98 43 02 00 00 00 00 80 08 00 00  ....F.C........
                        ^  ^  ^  ^  ^  ^  ^  ^  ^  ^  ^  ^  ^  ^  ^  ^
                        ptr to file name        open flags
      
      	.  0040:  00 00 00 00 02 00 00 00 00 00 00 00 00 00 00 00  ...............
                        ^  ^  ^  ^  ^  ^  ^  ^  ^  ^  ^  ^  ^  ^  ^  ^
      	.         open mode               padding
      
      	0x2cbb8 [0x50]: PERF_EVENT_SAMPLE (IP, 2): 5308: 0x7f0aab39e920 period: 1
      Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
      Cc: Jiaying Zhang <jiayingz@google.com>
      Cc: Martin Bligh <mbligh@google.com>
      Cc: Li Zefan <lizf@cn.fujitsu.com>
      Cc: Jason Baron <jbaron@redhat.com>
      Cc: Masami Hiramatsu <mhiramat@redhat.com>
      19007a67
    • Frederic Weisbecker's avatar
      tracing: Add fields format definition for syscall events · dc4ddb4c
      Frederic Weisbecker authored
      Define the format of the syscall trace fields to parse the binary
      values from a raw trace using the syscall events "format" file.
      
      This is defined dynamically using the syscalls metadata.
      It prepares the export of syscall event raw records to perf
      counters.
      
      Example:
      
      $ cat /debug/tracing/events/syscalls/sys_enter_sched_getparam/format
      name: sys_enter_sched_getparam
      ID: 39
      format:
      	field:unsigned short common_type;	offset:0;	size:2;
      	field:unsigned char common_flags;	offset:2;	size:1;
      	field:unsigned char common_preempt_count;	offset:3;	size:1;
      	field:int common_pid;	offset:4;	size:4;
      	field:int common_tgid;	offset:8;	size:4;
      
      	field:pid_t pid;	offset:12;	size:8;
      	field:struct sched_param * param;	offset:20;	size:8;
      
      print fmt: "pid: 0x%08lx, param: 0x%08lx", ((unsigned long)(REC->pid)), ((unsigned long)(REC->param))
      Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
      Cc: Jiaying Zhang <jiayingz@google.com>
      Cc: Martin Bligh <mbligh@google.com>
      Cc: Li Zefan <lizf@cn.fujitsu.com>
      Cc: Masami Hiramatsu <mhiramat@redhat.com>
      Cc: Jason Baron <jbaron@redhat.com>
      dc4ddb4c
    • Jason Baron's avatar
      tracing: Add perf counter support for syscalls tracing · f4b5ffcc
      Jason Baron authored
      The perf counter support is automated for usual trace events. But we
      have to define specific callbacks for this to handle syscalls trace
      events
      
      Make 'perf stat -e syscalls:sys_enter_blah' work with syscall style
      tracepoints.
      Signed-off-by: default avatarJason Baron <jbaron@redhat.com>
      Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
      Cc: Jiaying Zhang <jiayingz@google.com>
      Cc: Martin Bligh <mbligh@google.com>
      Cc: Li Zefan <lizf@cn.fujitsu.com>
      Cc: Masami Hiramatsu <mhiramat@redhat.com>
      Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      f4b5ffcc
    • Jason Baron's avatar
      tracing: Add individual syscalls tracepoint id support · 64c12e04
      Jason Baron authored
      The current state of syscalls tracepoints generates only one event id
      for every syscall events.
      
      This patch associates an id with each syscall trace event, so that we
      can identify each syscall trace event using the 'perf' tool.
      Signed-off-by: default avatarJason Baron <jbaron@redhat.com>
      Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
      Cc: Jiaying Zhang <jiayingz@google.com>
      Cc: Martin Bligh <mbligh@google.com>
      Cc: Li Zefan <lizf@cn.fujitsu.com>
      Cc: Masami Hiramatsu <mhiramat@redhat.com>
      Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      64c12e04
    • Jason Baron's avatar
      tracing: Add trace events for each syscall entry/exit · fb34a08c
      Jason Baron authored
      Layer Frederic's syscall tracer on tracepoints. We create trace events
      via hooking into the SYSCALL_DEFINE macros. This allows us to
      individually toggle syscall entry and exit points on/off.
      Signed-off-by: default avatarJason Baron <jbaron@redhat.com>
      Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
      Cc: Jiaying Zhang <jiayingz@google.com>
      Cc: Martin Bligh <mbligh@google.com>
      Cc: Li Zefan <lizf@cn.fujitsu.com>
      Cc: Masami Hiramatsu <mhiramat@redhat.com>
      Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      fb34a08c
    • Jason Baron's avatar
      tracing: Call arch_init_ftrace_syscalls at boot · 066e0378
      Jason Baron authored
      Call arch_init_ftrace_syscalls at boot, so we can determine early the
      set of syscalls for the syscall trace events.
      Signed-off-by: default avatarJason Baron <jbaron@redhat.com>
      Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
      Cc: Steven Rostedt <rostedt@goodmis.org>
      Cc: Peter Zijlstra <peterz@infradead.org>
      Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
      Cc: Jiaying Zhang <jiayingz@google.com>
      Cc: Martin Bligh <mbligh@google.com>
      Cc: Li Zefan <lizf@cn.fujitsu.com>
      Cc: Masami Hiramatsu <mhiramat@redhat.com>
      Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      066e0378
  7. 09 Apr, 2009 1 commit
    • Frederic Weisbecker's avatar
      tracing/syscalls: use a dedicated file header · 47788c58
      Frederic Weisbecker authored
      Impact: fix build warnings and possibe compat misbehavior on IA64
      
      Building a kernel on ia64 might trigger these ugly build warnings:
      
      CC      arch/ia64/ia32/sys_ia32.o
      In file included from arch/ia64/ia32/sys_ia32.c:55:
      arch/ia64/ia32/ia32priv.h:290:1: warning: "elf_check_arch" redefined
      In file included from include/linux/elf.h:7,
                       from include/linux/module.h:14,
                       from include/linux/ftrace.h:8,
                       from include/linux/syscalls.h:68,
                       from arch/ia64/ia32/sys_ia32.c:18:
      arch/ia64/include/asm/elf.h:19:1: warning: this is the location of the previous definition
      [...]
      
      sys_ia32.c includes linux/syscalls.h which in turn includes linux/ftrace.h
      to import the syscalls tracing prototypes.
      
      But including ftrace.h can pull too much things for a low level file,
      especially on ia64 where the ia32 private headers conflict with higher
      level headers.
      
      Now we isolate the syscall tracing headers in their own lightweight file.
      Reported-by: default avatarTony Luck <tony.luck@intel.com>
      Tested-by: default avatarTony Luck <tony.luck@intel.com>
      Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      Acked-by: default avatarTony Luck <tony.luck@intel.com>
      Signed-off-by: default avatarSteven Rostedt <rostedt@goodmis.org>
      Cc: Peter Zijlstra <a.p.zijlstra@chello.nl>
      Cc: Jason Baron <jbaron@redhat.com>
      Cc: "Frank Ch. Eigler" <fche@redhat.com>
      Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
      Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
      Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
      Cc: Jiaying Zhang <jiayingz@google.com>
      Cc: Michael Rubin <mrubin@google.com>
      Cc: Martin Bligh <mbligh@google.com>
      Cc: Michael Davidson <md@google.com>
      LKML-Reference: <20090408184058.GB6017@nowhere>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      47788c58
  8. 16 Mar, 2009 3 commits
  9. 13 Mar, 2009 2 commits
    • Frederic Weisbecker's avatar
      tracing/syscalls: core infrastructure for syscalls tracing, enhancements · bed1ffca
      Frederic Weisbecker authored
      Impact: new feature
      
      This adds the generic support for syscalls tracing. This is
      currently exploited through a devoted tracer but other tracing
      engines can use it. (They just have to play with
      {start,stop}_ftrace_syscalls() and use the display callbacks
      unless they want to override them.)
      
      The syscalls prototypes definitions are abused here to steal
      some metadata informations:
      
      - syscall name, param types, param names, number of params
      
      The syscall addr is not directly saved during this definition
      because we don't know if its prototype is available in the
      namespace. But we don't really need it. The arch has just to
      build a function able to resolve the syscall number to its
      metadata struct.
      
      The current tracer prints the syscall names, parameters names
      and values (and their types optionally). Currently the value is
      a raw hex but higher level values diplaying is on my TODO list.
      Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      LKML-Reference: <1236955332-10133-2-git-send-email-fweisbec@gmail.com>
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      bed1ffca
    • Frederic Weisbecker's avatar
      tracing/ftrace: syscall tracing infrastructure, basics · ee08c6ec
      Frederic Weisbecker authored
      Provide basic callbacks to do syscall tracing.
      Signed-off-by: default avatarFrederic Weisbecker <fweisbec@gmail.com>
      Acked-by: default avatarSteven Rostedt <rostedt@goodmis.org>
      Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
      LKML-Reference: <1236401580-5758-2-git-send-email-fweisbec@gmail.com>
      [ simplified it to a trace_printk() for now. ]
      Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
      ee08c6ec