linux/include/trace/syscall.h, branch v2.6.32

tracing: Create generic syscall TRACE_EVENTs

2009-08-25T22:41:48Z

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: Josh Stone Cc: Jason Baron Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Li Zefan Cc: Steven Rostedt Cc: Peter Zijlstra Cc: Mathieu Desnoyers Cc: Jiaying Zhang Cc: Martin Bligh Cc: Lai Jiangshan Cc: Paul Mundt Cc: Martin Schwidefsky Cc: Heiko Carstens LKML-Reference: <1251150194-1713-5-git-send-email-jistone@redhat.com> Signed-off-by: Frederic Weisbecker

tracing: Move tracepoint callbacks from declaration to definition

2009-08-25T22:36:41Z

It's not strictly correct for the tracepoint reg/unreg callbacks to occur when a client is hooking up, because the actual tracepoint may not be present yet. This happens to be fine for syscall, since that's in the core kernel, but it would cause problems for tracepoints defined in a module that hasn't been loaded yet. It also means the reg/unreg has to be EXPORTed for any modules to use the tracepoint (as in SystemTap). This patch removes DECLARE_TRACE_WITH_CALLBACK, and instead introduces DEFINE_TRACE_FN which stores the callbacks in struct tracepoint. The callbacks are used now when the active state of the tracepoint changes in set_tracepoint & disable_tracepoint. This also introduces TRACE_EVENT_FN, so ftrace events can also provide registration callbacks if needed. Signed-off-by: Josh Stone Cc: Jason Baron Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Li Zefan Cc: Steven Rostedt Cc: Peter Zijlstra Cc: Mathieu Desnoyers Cc: Jiaying Zhang Cc: Martin Bligh Cc: Lai Jiangshan Cc: Paul Mundt Cc: Martin Schwidefsky Cc: Heiko Carstens LKML-Reference: <1251150194-1713-4-git-send-email-jistone@redhat.com> Signed-off-by: Frederic Weisbecker

tracing: Make syscall tracepoints conditional

2009-08-25T22:24:19Z

The syscall enter/exit tracepoints are only supported on archs that HAVE_SYSCALL_TRACEPOINTS, so the declarations should be #ifdef'ed. Also, the definition of syscall_regfunc and syscall_unregfunc should depend on this same config, rather than the ftrace-specific one. Signed-off-by: Josh Stone Cc: Jason Baron Cc: Frederic Weisbecker Cc: Ingo Molnar Cc: Li Zefan Cc: Steven Rostedt Cc: Peter Zijlstra Cc: Mathieu Desnoyers Cc: Jiaying Zhang Cc: Martin Bligh Cc: Lai Jiangshan LKML-Reference: <1251150194-1713-3-git-send-email-jistone@redhat.com> Signed-off-by: Frederic Weisbecker

tracing/syscalls: Add filtering support

2009-08-19T13:02:24Z

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: Li Zefan Cc: Jason Baron Cc: Steven Rostedt Cc: Frederic Weisbecker LKML-Reference: <4A8BAFCB.1040006@cn.fujitsu.com> Signed-off-by: Ingo Molnar

tracing/syscalls: Add fields format for exit events

2009-08-19T13:02:23Z

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: Li Zefan Cc: Jason Baron Cc: Steven Rostedt Cc: Frederic Weisbecker LKML-Reference: <4A8BAF61.3060307@cn.fujitsu.com> Signed-off-by: Ingo Molnar

tracing: Add fields format definition for syscall events

2009-08-11T18:35:30Z

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: Frederic Weisbecker Cc: Lai Jiangshan Cc: Steven Rostedt Cc: Peter Zijlstra Cc: Mathieu Desnoyers Cc: Jiaying Zhang Cc: Martin Bligh Cc: Li Zefan Cc: Masami Hiramatsu Cc: Jason Baron

tracing: Add perf counter support for syscalls tracing

2009-08-11T18:35:29Z

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: Jason Baron Cc: Lai Jiangshan Cc: Steven Rostedt Cc: Peter Zijlstra Cc: Mathieu Desnoyers Cc: Jiaying Zhang Cc: Martin Bligh Cc: Li Zefan Cc: Masami Hiramatsu Signed-off-by: Frederic Weisbecker

tracing: Add individual syscalls tracepoint id support

2009-08-11T18:35:28Z

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: Jason Baron Cc: Lai Jiangshan Cc: Steven Rostedt Cc: Peter Zijlstra Cc: Mathieu Desnoyers Cc: Jiaying Zhang Cc: Martin Bligh Cc: Li Zefan Cc: Masami Hiramatsu Signed-off-by: Frederic Weisbecker

tracing: Add trace events for each syscall entry/exit

2009-08-11T18:35:28Z

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: Jason Baron Cc: Lai Jiangshan Cc: Steven Rostedt Cc: Peter Zijlstra Cc: Mathieu Desnoyers Cc: Jiaying Zhang Cc: Martin Bligh Cc: Li Zefan Cc: Masami Hiramatsu Signed-off-by: Frederic Weisbecker

tracing: Add syscall tracepoints

2009-08-11T18:35:26Z

add two tracepoints in syscall exit and entry path, conditioned on TIF_SYSCALL_FTRACE. Supports the syscall trace event code. Signed-off-by: Jason Baron Cc: Lai Jiangshan Cc: Steven Rostedt Cc: Peter Zijlstra Cc: Mathieu Desnoyers Cc: Jiaying Zhang Cc: Martin Bligh Cc: Li Zefan Cc: Masami Hiramatsu Signed-off-by: Frederic Weisbecker