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Merge branch 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

Browse source 
* 'tracing-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip:
  kernel/profile.c: Switch /proc/irq/prof_cpu_mask to seq_file
  tracing: Export trace_profile_buf symbols
  tracing/events: use list_for_entry_continue
  tracing: remove max_tracer_type_len
  function-graph: use ftrace_graph_funcs directly
  tracing: Remove markers
  tracing: Allocate the ftrace event profile buffer dynamically
  tracing: Factorize the events profile accounting
This commit is contained in:
Linus Torvalds 2009-09-21 09:05:47 -07:00
commit bd4c3a3441
26 changed files with 297 additions and 1658 deletions
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10
include/linux/ftrace_event.h
View file

@ -4,6 +4,7 @@
#include <linux/ring_buffer.h>
#include <linux/trace_seq.h>
#include <linux/percpu.h>
#include <linux/hardirq.h>
struct trace_array;
struct tracer;
@ -130,10 +131,15 @@ struct ftrace_event_call {
void *data;
atomic_t profile_count;
int (*profile_enable)(struct ftrace_event_call *);
void (*profile_disable)(struct ftrace_event_call *);
int (*profile_enable)(void);
void (*profile_disable)(void);
};
#define FTRACE_MAX_PROFILE_SIZE 2048
extern char *trace_profile_buf;
extern char *trace_profile_buf_nmi;
#define MAX_FILTER_PRED 32
#define MAX_FILTER_STR_VAL 256 /* Should handle KSYM_SYMBOL_LEN */

1
include/linux/kvm_host.h
View file

@ -15,7 +15,6 @@
#include <linux/sched.h>
#include <linux/mm.h>
#include <linux/preempt.h>
#include <linux/marker.h>
#include <linux/msi.h>
#include <asm/signal.h>

221
include/linux/marker.h
View file

@ -1,221 +0,0 @@
#ifndef _LINUX_MARKER_H
#define _LINUX_MARKER_H
/*
* Code markup for dynamic and static tracing.
*
* See Documentation/marker.txt.
*
* (C) Copyright 2006 Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
*
* This file is released under the GPLv2.
* See the file COPYING for more details.
*/
#include <stdarg.h>
#include <linux/types.h>
struct module;
struct marker;
/**
* marker_probe_func - Type of a marker probe function
* @probe_private: probe private data
* @call_private: call site private data
* @fmt: format string
* @args: variable argument list pointer. Use a pointer to overcome C's
* inability to pass this around as a pointer in a portable manner in
* the callee otherwise.
*
* Type of marker probe functions. They receive the mdata and need to parse the
* format string to recover the variable argument list.
*/
typedef void marker_probe_func(void *probe_private, void *call_private,
const char *fmt, va_list *args);
struct marker_probe_closure {
marker_probe_func *func; /* Callback */
void *probe_private; /* Private probe data */
};
struct marker {
const char *name; /* Marker name */
const char *format; /* Marker format string, describing the
* variable argument list.
*/
char state; /* Marker state. */
char ptype; /* probe type : 0 : single, 1 : multi */
/* Probe wrapper */
void (*call)(const struct marker *mdata, void *call_private, ...);
struct marker_probe_closure single;
struct marker_probe_closure *multi;
const char *tp_name; /* Optional tracepoint name */
void *tp_cb; /* Optional tracepoint callback */
} __attribute__((aligned(8)));
#ifdef CONFIG_MARKERS
#define _DEFINE_MARKER(name, tp_name_str, tp_cb, format) \
static const char __mstrtab_##name[] \
__attribute__((section("__markers_strings"))) \
= #name "\0" format; \
static struct marker __mark_##name \
__attribute__((section("__markers"), aligned(8))) = \
{ __mstrtab_##name, &__mstrtab_##name[sizeof(#name)], \
0, 0, marker_probe_cb, { __mark_empty_function, NULL},\
NULL, tp_name_str, tp_cb }
#define DEFINE_MARKER(name, format) \
_DEFINE_MARKER(name, NULL, NULL, format)
#define DEFINE_MARKER_TP(name, tp_name, tp_cb, format) \
_DEFINE_MARKER(name, #tp_name, tp_cb, format)
/*
* Note : the empty asm volatile with read constraint is used here instead of a
* "used" attribute to fix a gcc 4.1.x bug.
* Make sure the alignment of the structure in the __markers section will
* not add unwanted padding between the beginning of the section and the
* structure. Force alignment to the same alignment as the section start.
*
* The "generic" argument controls which marker enabling mechanism must be used.
* If generic is true, a variable read is used.
* If generic is false, immediate values are used.
*/
#define __trace_mark(generic, name, call_private, format, args...) \
do { \
DEFINE_MARKER(name, format); \
__mark_check_format(format, ## args); \
if (unlikely(__mark_##name.state)) { \
(*__mark_##name.call) \
(&__mark_##name, call_private, ## args);\
} \
} while (0)
#define __trace_mark_tp(name, call_private, tp_name, tp_cb, format, args...) \
do { \
void __check_tp_type(void) \
{ \
register_trace_##tp_name(tp_cb); \
} \
DEFINE_MARKER_TP(name, tp_name, tp_cb, format); \
__mark_check_format(format, ## args); \
(*__mark_##name.call)(&__mark_##name, call_private, \
## args); \
} while (0)
extern void marker_update_probe_range(struct marker *begin,
struct marker *end);
#define GET_MARKER(name) (__mark_##name)
#else /* !CONFIG_MARKERS */
#define DEFINE_MARKER(name, tp_name, tp_cb, format)
#define __trace_mark(generic, name, call_private, format, args...) \
__mark_check_format(format, ## args)
#define __trace_mark_tp(name, call_private, tp_name, tp_cb, format, args...) \
do { \
void __check_tp_type(void) \
{ \
register_trace_##tp_name(tp_cb); \
} \
__mark_check_format(format, ## args); \
} while (0)
static inline void marker_update_probe_range(struct marker *begin,
struct marker *end)
{ }
#define GET_MARKER(name)
#endif /* CONFIG_MARKERS */
/**
* trace_mark - Marker using code patching
* @name: marker name, not quoted.
* @format: format string
* @args...: variable argument list
*
* Places a marker using optimized code patching technique (imv_read())
* to be enabled when immediate values are present.
*/
#define trace_mark(name, format, args...) \
__trace_mark(0, name, NULL, format, ## args)
/**
* _trace_mark - Marker using variable read
* @name: marker name, not quoted.
* @format: format string
* @args...: variable argument list
*
* Places a marker using a standard memory read (_imv_read()) to be
* enabled. Should be used for markers in code paths where instruction
* modification based enabling is not welcome. (__init and __exit functions,
* lockdep, some traps, printk).
*/
#define _trace_mark(name, format, args...) \
__trace_mark(1, name, NULL, format, ## args)
/**
* trace_mark_tp - Marker in a tracepoint callback
* @name: marker name, not quoted.
* @tp_name: tracepoint name, not quoted.
* @tp_cb: tracepoint callback. Should have an associated global symbol so it
* is not optimized away by the compiler (should not be static).
* @format: format string
* @args...: variable argument list
*
* Places a marker in a tracepoint callback.
*/
#define trace_mark_tp(name, tp_name, tp_cb, format, args...) \
__trace_mark_tp(name, NULL, tp_name, tp_cb, format, ## args)
/**
* MARK_NOARGS - Format string for a marker with no argument.
*/
#define MARK_NOARGS " "
/* To be used for string format validity checking with gcc */
static inline void __printf(1, 2) ___mark_check_format(const char *fmt, ...)
{
}
#define __mark_check_format(format, args...) \
do { \
if (0) \
___mark_check_format(format, ## args); \
} while (0)
extern marker_probe_func __mark_empty_function;
extern void marker_probe_cb(const struct marker *mdata,
void *call_private, ...);
/*
* Connect a probe to a marker.
* private data pointer must be a valid allocated memory address, or NULL.
*/
extern int marker_probe_register(const char *name, const char *format,
marker_probe_func *probe, void *probe_private);
/*
* Returns the private data given to marker_probe_register.
*/
extern int marker_probe_unregister(const char *name,
marker_probe_func *probe, void *probe_private);
/*
* Unregister a marker by providing the registered private data.
*/
extern int marker_probe_unregister_private_data(marker_probe_func *probe,
void *probe_private);
extern void *marker_get_private_data(const char *name, marker_probe_func *probe,
int num);
/*
* marker_synchronize_unregister must be called between the last marker probe
* unregistration and the first one of
* - the end of module exit function
* - the free of any resource used by the probes
* to ensure the code and data are valid for any possibly running probes.
*/
#define marker_synchronize_unregister() synchronize_sched()
#endif

11
include/linux/module.h
View file

@ -15,7 +15,6 @@
#include <linux/stringify.h>
#include <linux/kobject.h>
#include <linux/moduleparam.h>
#include <linux/marker.h>
#include <linux/tracepoint.h>
#include <asm/local.h>
@ -327,10 +326,6 @@ struct module
/* The command line arguments (may be mangled). People like
keeping pointers to this stuff */
char *args;
#ifdef CONFIG_MARKERS
struct marker *markers;
unsigned int num_markers;
#endif
#ifdef CONFIG_TRACEPOINTS
struct tracepoint *tracepoints;
unsigned int num_tracepoints;
@ -535,8 +530,6 @@ int unregister_module_notifier(struct notifier_block * nb);
extern void print_modules(void);
extern void module_update_markers(void);
extern void module_update_tracepoints(void);
extern int module_get_iter_tracepoints(struct tracepoint_iter *iter);
@ -651,10 +644,6 @@ static inline void print_modules(void)
{
}
static inline void module_update_markers(void)
{
}
static inline void module_update_tracepoints(void)
{
}

24
include/linux/syscalls.h
View file

@ -100,33 +100,25 @@ struct perf_counter_attr;
#ifdef CONFIG_EVENT_PROFILE
#define TRACE_SYS_ENTER_PROFILE(sname) \
static int prof_sysenter_enable_##sname(struct ftrace_event_call *event_call) \
static int prof_sysenter_enable_##sname(void) \
{ \
int ret = 0; \
if (!atomic_inc_return(&event_enter_##sname.profile_count)) \
ret = reg_prof_syscall_enter("sys"#sname); \
return ret; \
return reg_prof_syscall_enter("sys"#sname); \
} \
\
static void prof_sysenter_disable_##sname(struct ftrace_event_call *event_call)\
static void prof_sysenter_disable_##sname(void) \
{ \
if (atomic_add_negative(-1, &event_enter_##sname.profile_count)) \
unreg_prof_syscall_enter("sys"#sname); \
unreg_prof_syscall_enter("sys"#sname); \
}
#define TRACE_SYS_EXIT_PROFILE(sname) \
static int prof_sysexit_enable_##sname(struct ftrace_event_call *event_call) \
static int prof_sysexit_enable_##sname(void) \
{ \
int ret = 0; \
if (!atomic_inc_return(&event_exit_##sname.profile_count)) \
ret = reg_prof_syscall_exit("sys"#sname); \
return ret; \
return reg_prof_syscall_exit("sys"#sname); \
} \
\
static void prof_sysexit_disable_##sname(struct ftrace_event_call *event_call) \
static void prof_sysexit_disable_##sname(void) \
{ \
if (atomic_add_negative(-1, &event_exit_##sname.profile_count)) \
unreg_prof_syscall_exit("sys"#sname); \
unreg_prof_syscall_exit("sys"#sname); \
}
#define TRACE_SYS_ENTER_PROFILE_INIT(sname) \