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-rw-r--r--kernel/trace/Kconfig11
-rw-r--r--kernel/trace/Makefile1
-rw-r--r--kernel/trace/ftrace.c33
-rw-r--r--kernel/trace/ring_buffer.c179
-rw-r--r--kernel/trace/ring_buffer_benchmark.c5
-rw-r--r--kernel/trace/trace.c127
-rw-r--r--kernel/trace/trace.h47
-rw-r--r--kernel/trace/trace_entries.h12
-rw-r--r--kernel/trace/trace_events_filter.c2
-rw-r--r--kernel/trace/trace_functions_graph.c169
-rw-r--r--kernel/trace/trace_hw_branches.c312
-rw-r--r--kernel/trace/trace_irqsoff.c271
-rw-r--r--kernel/trace/trace_kprobe.c535
-rw-r--r--kernel/trace/trace_ksym.c26
-rw-r--r--kernel/trace/trace_output.c18
-rw-r--r--kernel/trace/trace_sched_switch.c5
-rw-r--r--kernel/trace/trace_sched_wakeup.c5
-rw-r--r--kernel/trace/trace_selftest.c64
18 files changed, 1032 insertions, 790 deletions
diff --git a/kernel/trace/Kconfig b/kernel/trace/Kconfig
index 13e13d428cd3..8b1797c4545b 100644
--- a/kernel/trace/Kconfig
+++ b/kernel/trace/Kconfig
@@ -44,9 +44,6 @@ config HAVE_FTRACE_MCOUNT_RECORD
44 help 44 help
45 See Documentation/trace/ftrace-design.txt 45 See Documentation/trace/ftrace-design.txt
46 46
47config HAVE_HW_BRANCH_TRACER
48 bool
49
50config HAVE_SYSCALL_TRACEPOINTS 47config HAVE_SYSCALL_TRACEPOINTS
51 bool 48 bool
52 help 49 help
@@ -374,14 +371,6 @@ config STACK_TRACER
374 371
375 Say N if unsure. 372 Say N if unsure.
376 373
377config HW_BRANCH_TRACER
378 depends on HAVE_HW_BRANCH_TRACER
379 bool "Trace hw branches"
380 select GENERIC_TRACER
381 help
382 This tracer records all branches on the system in a circular
383 buffer, giving access to the last N branches for each cpu.
384
385config KMEMTRACE 374config KMEMTRACE
386 bool "Trace SLAB allocations" 375 bool "Trace SLAB allocations"
387 select GENERIC_TRACER 376 select GENERIC_TRACER
diff --git a/kernel/trace/Makefile b/kernel/trace/Makefile
index 78edc6490038..ffb1a5b0550e 100644
--- a/kernel/trace/Makefile
+++ b/kernel/trace/Makefile
@@ -41,7 +41,6 @@ obj-$(CONFIG_MMIOTRACE) += trace_mmiotrace.o
41obj-$(CONFIG_BOOT_TRACER) += trace_boot.o 41obj-$(CONFIG_BOOT_TRACER) += trace_boot.o
42obj-$(CONFIG_FUNCTION_GRAPH_TRACER) += trace_functions_graph.o 42obj-$(CONFIG_FUNCTION_GRAPH_TRACER) += trace_functions_graph.o
43obj-$(CONFIG_TRACE_BRANCH_PROFILING) += trace_branch.o 43obj-$(CONFIG_TRACE_BRANCH_PROFILING) += trace_branch.o
44obj-$(CONFIG_HW_BRANCH_TRACER) += trace_hw_branches.o
45obj-$(CONFIG_KMEMTRACE) += kmemtrace.o 44obj-$(CONFIG_KMEMTRACE) += kmemtrace.o
46obj-$(CONFIG_WORKQUEUE_TRACER) += trace_workqueue.o 45obj-$(CONFIG_WORKQUEUE_TRACER) += trace_workqueue.o
47obj-$(CONFIG_BLK_DEV_IO_TRACE) += blktrace.o 46obj-$(CONFIG_BLK_DEV_IO_TRACE) += blktrace.o
diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index 2404b59b3097..32837e19e3bd 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -264,6 +264,7 @@ struct ftrace_profile {
264 unsigned long counter; 264 unsigned long counter;
265#ifdef CONFIG_FUNCTION_GRAPH_TRACER 265#ifdef CONFIG_FUNCTION_GRAPH_TRACER
266 unsigned long long time; 266 unsigned long long time;
267 unsigned long long time_squared;
267#endif 268#endif
268}; 269};
269 270
@@ -366,9 +367,9 @@ static int function_stat_headers(struct seq_file *m)
366{ 367{
367#ifdef CONFIG_FUNCTION_GRAPH_TRACER 368#ifdef CONFIG_FUNCTION_GRAPH_TRACER
368 seq_printf(m, " Function " 369 seq_printf(m, " Function "
369 "Hit Time Avg\n" 370 "Hit Time Avg s^2\n"
370 " -------- " 371 " -------- "
371 "--- ---- ---\n"); 372 "--- ---- --- ---\n");
372#else 373#else
373 seq_printf(m, " Function Hit\n" 374 seq_printf(m, " Function Hit\n"
374 " -------- ---\n"); 375 " -------- ---\n");
@@ -384,6 +385,7 @@ static int function_stat_show(struct seq_file *m, void *v)
384 static DEFINE_MUTEX(mutex); 385 static DEFINE_MUTEX(mutex);
385 static struct trace_seq s; 386 static struct trace_seq s;
386 unsigned long long avg; 387 unsigned long long avg;
388 unsigned long long stddev;
387#endif 389#endif
388 390
389 kallsyms_lookup(rec->ip, NULL, NULL, NULL, str); 391 kallsyms_lookup(rec->ip, NULL, NULL, NULL, str);
@@ -394,11 +396,25 @@ static int function_stat_show(struct seq_file *m, void *v)
394 avg = rec->time; 396 avg = rec->time;
395 do_div(avg, rec->counter); 397 do_div(avg, rec->counter);
396 398
399 /* Sample standard deviation (s^2) */
400 if (rec->counter <= 1)
401 stddev = 0;
402 else {
403 stddev = rec->time_squared - rec->counter * avg * avg;
404 /*
405 * Divide only 1000 for ns^2 -> us^2 conversion.
406 * trace_print_graph_duration will divide 1000 again.
407 */
408 do_div(stddev, (rec->counter - 1) * 1000);
409 }
410
397 mutex_lock(&mutex); 411 mutex_lock(&mutex);
398 trace_seq_init(&s); 412 trace_seq_init(&s);
399 trace_print_graph_duration(rec->time, &s); 413 trace_print_graph_duration(rec->time, &s);
400 trace_seq_puts(&s, " "); 414 trace_seq_puts(&s, " ");
401 trace_print_graph_duration(avg, &s); 415 trace_print_graph_duration(avg, &s);
416 trace_seq_puts(&s, " ");
417 trace_print_graph_duration(stddev, &s);
402 trace_print_seq(m, &s); 418 trace_print_seq(m, &s);
403 mutex_unlock(&mutex); 419 mutex_unlock(&mutex);
404#endif 420#endif
@@ -650,6 +666,10 @@ static void profile_graph_return(struct ftrace_graph_ret *trace)
650 if (!stat->hash || !ftrace_profile_enabled) 666 if (!stat->hash || !ftrace_profile_enabled)
651 goto out; 667 goto out;
652 668
669 /* If the calltime was zero'd ignore it */
670 if (!trace->calltime)
671 goto out;
672
653 calltime = trace->rettime - trace->calltime; 673 calltime = trace->rettime - trace->calltime;
654 674
655 if (!(trace_flags & TRACE_ITER_GRAPH_TIME)) { 675 if (!(trace_flags & TRACE_ITER_GRAPH_TIME)) {
@@ -668,8 +688,10 @@ static void profile_graph_return(struct ftrace_graph_ret *trace)
668 } 688 }
669 689
670 rec = ftrace_find_profiled_func(stat, trace->func); 690 rec = ftrace_find_profiled_func(stat, trace->func);
671 if (rec) 691 if (rec) {
672 rec->time += calltime; 692 rec->time += calltime;
693 rec->time_squared += calltime * calltime;
694 }
673 695
674 out: 696 out:
675 local_irq_restore(flags); 697 local_irq_restore(flags);
@@ -3212,8 +3234,7 @@ free:
3212} 3234}
3213 3235
3214static void 3236static void
3215ftrace_graph_probe_sched_switch(struct rq *__rq, struct task_struct *prev, 3237ftrace_graph_probe_sched_switch(struct task_struct *prev, struct task_struct *next)
3216 struct task_struct *next)
3217{ 3238{
3218 unsigned long long timestamp; 3239 unsigned long long timestamp;
3219 int index; 3240 int index;
@@ -3339,11 +3360,11 @@ void unregister_ftrace_graph(void)
3339 goto out; 3360 goto out;
3340 3361
3341 ftrace_graph_active--; 3362 ftrace_graph_active--;
3342 unregister_trace_sched_switch(ftrace_graph_probe_sched_switch);
3343 ftrace_graph_return = (trace_func_graph_ret_t)ftrace_stub; 3363 ftrace_graph_return = (trace_func_graph_ret_t)ftrace_stub;
3344 ftrace_graph_entry = ftrace_graph_entry_stub; 3364 ftrace_graph_entry = ftrace_graph_entry_stub;
3345 ftrace_shutdown(FTRACE_STOP_FUNC_RET); 3365 ftrace_shutdown(FTRACE_STOP_FUNC_RET);
3346 unregister_pm_notifier(&ftrace_suspend_notifier); 3366 unregister_pm_notifier(&ftrace_suspend_notifier);
3367 unregister_trace_sched_switch(ftrace_graph_probe_sched_switch);
3347 3368
3348 out: 3369 out:
3349 mutex_unlock(&ftrace_lock); 3370 mutex_unlock(&ftrace_lock);
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index 41ca394feb22..7f6059c5aa94 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -319,6 +319,11 @@ EXPORT_SYMBOL_GPL(ring_buffer_event_data);
319#define TS_MASK ((1ULL << TS_SHIFT) - 1) 319#define TS_MASK ((1ULL << TS_SHIFT) - 1)
320#define TS_DELTA_TEST (~TS_MASK) 320#define TS_DELTA_TEST (~TS_MASK)
321 321
322/* Flag when events were overwritten */
323#define RB_MISSED_EVENTS (1 << 31)
324/* Missed count stored at end */
325#define RB_MISSED_STORED (1 << 30)
326
322struct buffer_data_page { 327struct buffer_data_page {
323 u64 time_stamp; /* page time stamp */ 328 u64 time_stamp; /* page time stamp */
324 local_t commit; /* write committed index */ 329 local_t commit; /* write committed index */
@@ -338,6 +343,7 @@ struct buffer_page {
338 local_t write; /* index for next write */ 343 local_t write; /* index for next write */
339 unsigned read; /* index for next read */ 344 unsigned read; /* index for next read */
340 local_t entries; /* entries on this page */ 345 local_t entries; /* entries on this page */
346 unsigned long real_end; /* real end of data */
341 struct buffer_data_page *page; /* Actual data page */ 347 struct buffer_data_page *page; /* Actual data page */
342}; 348};
343 349
@@ -417,6 +423,12 @@ int ring_buffer_print_page_header(struct trace_seq *s)
417 (unsigned int)sizeof(field.commit), 423 (unsigned int)sizeof(field.commit),
418 (unsigned int)is_signed_type(long)); 424 (unsigned int)is_signed_type(long));
419 425
426 ret = trace_seq_printf(s, "\tfield: int overwrite;\t"
427 "offset:%u;\tsize:%u;\tsigned:%u;\n",
428 (unsigned int)offsetof(typeof(field), commit),
429 1,
430 (unsigned int)is_signed_type(long));
431
420 ret = trace_seq_printf(s, "\tfield: char data;\t" 432 ret = trace_seq_printf(s, "\tfield: char data;\t"
421 "offset:%u;\tsize:%u;\tsigned:%u;\n", 433 "offset:%u;\tsize:%u;\tsigned:%u;\n",
422 (unsigned int)offsetof(typeof(field), data), 434 (unsigned int)offsetof(typeof(field), data),
@@ -440,6 +452,8 @@ struct ring_buffer_per_cpu {
440 struct buffer_page *tail_page; /* write to tail */ 452 struct buffer_page *tail_page; /* write to tail */
441 struct buffer_page *commit_page; /* committed pages */ 453 struct buffer_page *commit_page; /* committed pages */
442 struct buffer_page *reader_page; 454 struct buffer_page *reader_page;
455 unsigned long lost_events;
456 unsigned long last_overrun;
443 local_t commit_overrun; 457 local_t commit_overrun;
444 local_t overrun; 458 local_t overrun;
445 local_t entries; 459 local_t entries;
@@ -1762,6 +1776,13 @@ rb_reset_tail(struct ring_buffer_per_cpu *cpu_buffer,
1762 kmemcheck_annotate_bitfield(event, bitfield); 1776 kmemcheck_annotate_bitfield(event, bitfield);
1763 1777
1764 /* 1778 /*
1779 * Save the original length to the meta data.
1780 * This will be used by the reader to add lost event
1781 * counter.
1782 */
1783 tail_page->real_end = tail;
1784
1785 /*
1765 * If this event is bigger than the minimum size, then 1786 * If this event is bigger than the minimum size, then
1766 * we need to be careful that we don't subtract the 1787 * we need to be careful that we don't subtract the
1767 * write counter enough to allow another writer to slip 1788 * write counter enough to allow another writer to slip
@@ -1979,17 +2000,13 @@ rb_add_time_stamp(struct ring_buffer_per_cpu *cpu_buffer,
1979 u64 *ts, u64 *delta) 2000 u64 *ts, u64 *delta)
1980{ 2001{
1981 struct ring_buffer_event *event; 2002 struct ring_buffer_event *event;
1982 static int once;
1983 int ret; 2003 int ret;
1984 2004
1985 if (unlikely(*delta > (1ULL << 59) && !once++)) { 2005 WARN_ONCE(*delta > (1ULL << 59),
1986 printk(KERN_WARNING "Delta way too big! %llu" 2006 KERN_WARNING "Delta way too big! %llu ts=%llu write stamp = %llu\n",
1987 " ts=%llu write stamp = %llu\n", 2007 (unsigned long long)*delta,
1988 (unsigned long long)*delta, 2008 (unsigned long long)*ts,
1989 (unsigned long long)*ts, 2009 (unsigned long long)cpu_buffer->write_stamp);
1990 (unsigned long long)cpu_buffer->write_stamp);
1991 WARN_ON(1);
1992 }
1993 2010
1994 /* 2011 /*
1995 * The delta is too big, we to add a 2012 * The delta is too big, we to add a
@@ -2838,6 +2855,7 @@ static struct buffer_page *
2838rb_get_reader_page(struct ring_buffer_per_cpu *cpu_buffer) 2855rb_get_reader_page(struct ring_buffer_per_cpu *cpu_buffer)
2839{ 2856{
2840 struct buffer_page *reader = NULL; 2857 struct buffer_page *reader = NULL;
2858 unsigned long overwrite;
2841 unsigned long flags; 2859 unsigned long flags;
2842 int nr_loops = 0; 2860 int nr_loops = 0;
2843 int ret; 2861 int ret;
@@ -2879,6 +2897,7 @@ rb_get_reader_page(struct ring_buffer_per_cpu *cpu_buffer)
2879 local_set(&cpu_buffer->reader_page->write, 0); 2897 local_set(&cpu_buffer->reader_page->write, 0);
2880 local_set(&cpu_buffer->reader_page->entries, 0); 2898 local_set(&cpu_buffer->reader_page->entries, 0);
2881 local_set(&cpu_buffer->reader_page->page->commit, 0); 2899 local_set(&cpu_buffer->reader_page->page->commit, 0);
2900 cpu_buffer->reader_page->real_end = 0;
2882 2901
2883 spin: 2902 spin:
2884 /* 2903 /*
@@ -2899,6 +2918,18 @@ rb_get_reader_page(struct ring_buffer_per_cpu *cpu_buffer)
2899 rb_set_list_to_head(cpu_buffer, &cpu_buffer->reader_page->list); 2918 rb_set_list_to_head(cpu_buffer, &cpu_buffer->reader_page->list);
2900 2919
2901 /* 2920 /*
2921 * We want to make sure we read the overruns after we set up our
2922 * pointers to the next object. The writer side does a
2923 * cmpxchg to cross pages which acts as the mb on the writer
2924 * side. Note, the reader will constantly fail the swap
2925 * while the writer is updating the pointers, so this
2926 * guarantees that the overwrite recorded here is the one we
2927 * want to compare with the last_overrun.
2928 */
2929 smp_mb();
2930 overwrite = local_read(&(cpu_buffer->overrun));
2931
2932 /*
2902 * Here's the tricky part. 2933 * Here's the tricky part.
2903 * 2934 *
2904 * We need to move the pointer past the header page. 2935 * We need to move the pointer past the header page.
@@ -2929,6 +2960,11 @@ rb_get_reader_page(struct ring_buffer_per_cpu *cpu_buffer)
2929 cpu_buffer->reader_page = reader; 2960 cpu_buffer->reader_page = reader;
2930 rb_reset_reader_page(cpu_buffer); 2961 rb_reset_reader_page(cpu_buffer);
2931 2962
2963 if (overwrite != cpu_buffer->last_overrun) {
2964 cpu_buffer->lost_events = overwrite - cpu_buffer->last_overrun;
2965 cpu_buffer->last_overrun = overwrite;
2966 }
2967
2932 goto again; 2968 goto again;
2933 2969
2934 out: 2970 out:
@@ -3005,8 +3041,14 @@ static void rb_advance_iter(struct ring_buffer_iter *iter)
3005 rb_advance_iter(iter); 3041 rb_advance_iter(iter);
3006} 3042}
3007 3043
3044static int rb_lost_events(struct ring_buffer_per_cpu *cpu_buffer)
3045{
3046 return cpu_buffer->lost_events;
3047}
3048
3008static struct ring_buffer_event * 3049static struct ring_buffer_event *
3009rb_buffer_peek(struct ring_buffer_per_cpu *cpu_buffer, u64 *ts) 3050rb_buffer_peek(struct ring_buffer_per_cpu *cpu_buffer, u64 *ts,
3051 unsigned long *lost_events)
3010{ 3052{
3011 struct ring_buffer_event *event; 3053 struct ring_buffer_event *event;
3012 struct buffer_page *reader; 3054 struct buffer_page *reader;
@@ -3058,6 +3100,8 @@ rb_buffer_peek(struct ring_buffer_per_cpu *cpu_buffer, u64 *ts)
3058 ring_buffer_normalize_time_stamp(cpu_buffer->buffer, 3100 ring_buffer_normalize_time_stamp(cpu_buffer->buffer,
3059 cpu_buffer->cpu, ts); 3101 cpu_buffer->cpu, ts);
3060 } 3102 }
3103 if (lost_events)
3104 *lost_events = rb_lost_events(cpu_buffer);
3061 return event; 3105 return event;
3062 3106
3063 default: 3107 default:
@@ -3168,12 +3212,14 @@ static inline int rb_ok_to_lock(void)
3168 * @buffer: The ring buffer to read 3212 * @buffer: The ring buffer to read
3169 * @cpu: The cpu to peak at 3213 * @cpu: The cpu to peak at
3170 * @ts: The timestamp counter of this event. 3214 * @ts: The timestamp counter of this event.
3215 * @lost_events: a variable to store if events were lost (may be NULL)
3171 * 3216 *
3172 * This will return the event that will be read next, but does 3217 * This will return the event that will be read next, but does
3173 * not consume the data. 3218 * not consume the data.
3174 */ 3219 */
3175struct ring_buffer_event * 3220struct ring_buffer_event *
3176ring_buffer_peek(struct ring_buffer *buffer, int cpu, u64 *ts) 3221ring_buffer_peek(struct ring_buffer *buffer, int cpu, u64 *ts,
3222 unsigned long *lost_events)
3177{ 3223{
3178 struct ring_buffer_per_cpu *cpu_buffer = buffer->buffers[cpu]; 3224 struct ring_buffer_per_cpu *cpu_buffer = buffer->buffers[cpu];
3179 struct ring_buffer_event *event; 3225 struct ring_buffer_event *event;
@@ -3188,7 +3234,7 @@ ring_buffer_peek(struct ring_buffer *buffer, int cpu, u64 *ts)
3188 local_irq_save(flags); 3234 local_irq_save(flags);
3189 if (dolock) 3235 if (dolock)
3190 spin_lock(&cpu_buffer->reader_lock); 3236 spin_lock(&cpu_buffer->reader_lock);
3191 event = rb_buffer_peek(cpu_buffer, ts); 3237 event = rb_buffer_peek(cpu_buffer, ts, lost_events);
3192 if (event && event->type_len == RINGBUF_TYPE_PADDING) 3238 if (event && event->type_len == RINGBUF_TYPE_PADDING)
3193 rb_advance_reader(cpu_buffer); 3239 rb_advance_reader(cpu_buffer);
3194 if (dolock) 3240 if (dolock)
@@ -3230,13 +3276,17 @@ ring_buffer_iter_peek(struct ring_buffer_iter *iter, u64 *ts)
3230/** 3276/**
3231 * ring_buffer_consume - return an event and consume it 3277 * ring_buffer_consume - return an event and consume it
3232 * @buffer: The ring buffer to get the next event from 3278 * @buffer: The ring buffer to get the next event from
3279 * @cpu: the cpu to read the buffer from
3280 * @ts: a variable to store the timestamp (may be NULL)
3281 * @lost_events: a variable to store if events were lost (may be NULL)
3233 * 3282 *
3234 * Returns the next event in the ring buffer, and that event is consumed. 3283 * Returns the next event in the ring buffer, and that event is consumed.
3235 * Meaning, that sequential reads will keep returning a different event, 3284 * Meaning, that sequential reads will keep returning a different event,
3236 * and eventually empty the ring buffer if the producer is slower. 3285 * and eventually empty the ring buffer if the producer is slower.
3237 */ 3286 */
3238struct ring_buffer_event * 3287struct ring_buffer_event *
3239ring_buffer_consume(struct ring_buffer *buffer, int cpu, u64 *ts) 3288ring_buffer_consume(struct ring_buffer *buffer, int cpu, u64 *ts,
3289 unsigned long *lost_events)
3240{ 3290{
3241 struct ring_buffer_per_cpu *cpu_buffer; 3291 struct ring_buffer_per_cpu *cpu_buffer;
3242 struct ring_buffer_event *event = NULL; 3292 struct ring_buffer_event *event = NULL;
@@ -3257,9 +3307,11 @@ ring_buffer_consume(struct ring_buffer *buffer, int cpu, u64 *ts)
3257 if (dolock) 3307 if (dolock)
3258 spin_lock(&cpu_buffer->reader_lock); 3308 spin_lock(&cpu_buffer->reader_lock);
3259 3309
3260 event = rb_buffer_peek(cpu_buffer, ts); 3310 event = rb_buffer_peek(cpu_buffer, ts, lost_events);
3261 if (event) 3311 if (event) {
3312 cpu_buffer->lost_events = 0;
3262 rb_advance_reader(cpu_buffer); 3313 rb_advance_reader(cpu_buffer);
3314 }
3263 3315
3264 if (dolock) 3316 if (dolock)
3265 spin_unlock(&cpu_buffer->reader_lock); 3317 spin_unlock(&cpu_buffer->reader_lock);
@@ -3276,23 +3328,30 @@ ring_buffer_consume(struct ring_buffer *buffer, int cpu, u64 *ts)
3276EXPORT_SYMBOL_GPL(ring_buffer_consume); 3328EXPORT_SYMBOL_GPL(ring_buffer_consume);
3277 3329
3278/** 3330/**
3279 * ring_buffer_read_start - start a non consuming read of the buffer 3331 * ring_buffer_read_prepare - Prepare for a non consuming read of the buffer
3280 * @buffer: The ring buffer to read from 3332 * @buffer: The ring buffer to read from
3281 * @cpu: The cpu buffer to iterate over 3333 * @cpu: The cpu buffer to iterate over
3282 * 3334 *
3283 * This starts up an iteration through the buffer. It also disables 3335 * This performs the initial preparations necessary to iterate
3284 * the recording to the buffer until the reading is finished. 3336 * through the buffer. Memory is allocated, buffer recording
3285 * This prevents the reading from being corrupted. This is not 3337 * is disabled, and the iterator pointer is returned to the caller.
3286 * a consuming read, so a producer is not expected.
3287 * 3338 *
3288 * Must be paired with ring_buffer_finish. 3339 * Disabling buffer recordng prevents the reading from being
3340 * corrupted. This is not a consuming read, so a producer is not
3341 * expected.
3342 *
3343 * After a sequence of ring_buffer_read_prepare calls, the user is
3344 * expected to make at least one call to ring_buffer_prepare_sync.
3345 * Afterwards, ring_buffer_read_start is invoked to get things going
3346 * for real.
3347 *
3348 * This overall must be paired with ring_buffer_finish.
3289 */ 3349 */
3290struct ring_buffer_iter * 3350struct ring_buffer_iter *
3291ring_buffer_read_start(struct ring_buffer *buffer, int cpu) 3351ring_buffer_read_prepare(struct ring_buffer *buffer, int cpu)
3292{ 3352{
3293 struct ring_buffer_per_cpu *cpu_buffer; 3353 struct ring_buffer_per_cpu *cpu_buffer;
3294 struct ring_buffer_iter *iter; 3354 struct ring_buffer_iter *iter;
3295 unsigned long flags;
3296 3355
3297 if (!cpumask_test_cpu(cpu, buffer->cpumask)) 3356 if (!cpumask_test_cpu(cpu, buffer->cpumask))
3298 return NULL; 3357 return NULL;
@@ -3306,15 +3365,52 @@ ring_buffer_read_start(struct ring_buffer *buffer, int cpu)
3306 iter->cpu_buffer = cpu_buffer; 3365 iter->cpu_buffer = cpu_buffer;
3307 3366
3308 atomic_inc(&cpu_buffer->record_disabled); 3367 atomic_inc(&cpu_buffer->record_disabled);
3368
3369 return iter;
3370}
3371EXPORT_SYMBOL_GPL(ring_buffer_read_prepare);
3372
3373/**
3374 * ring_buffer_read_prepare_sync - Synchronize a set of prepare calls
3375 *
3376 * All previously invoked ring_buffer_read_prepare calls to prepare
3377 * iterators will be synchronized. Afterwards, read_buffer_read_start
3378 * calls on those iterators are allowed.
3379 */
3380void
3381ring_buffer_read_prepare_sync(void)
3382{
3309 synchronize_sched(); 3383 synchronize_sched();
3384}
3385EXPORT_SYMBOL_GPL(ring_buffer_read_prepare_sync);
3386
3387/**
3388 * ring_buffer_read_start - start a non consuming read of the buffer
3389 * @iter: The iterator returned by ring_buffer_read_prepare
3390 *
3391 * This finalizes the startup of an iteration through the buffer.
3392 * The iterator comes from a call to ring_buffer_read_prepare and
3393 * an intervening ring_buffer_read_prepare_sync must have been
3394 * performed.
3395 *
3396 * Must be paired with ring_buffer_finish.
3397 */
3398void
3399ring_buffer_read_start(struct ring_buffer_iter *iter)
3400{
3401 struct ring_buffer_per_cpu *cpu_buffer;
3402 unsigned long flags;
3403
3404 if (!iter)
3405 return;
3406
3407 cpu_buffer = iter->cpu_buffer;
3310 3408
3311 spin_lock_irqsave(&cpu_buffer->reader_lock, flags); 3409 spin_lock_irqsave(&cpu_buffer->reader_lock, flags);
3312 arch_spin_lock(&cpu_buffer->lock); 3410 arch_spin_lock(&cpu_buffer->lock);
3313 rb_iter_reset(iter); 3411 rb_iter_reset(iter);
3314 arch_spin_unlock(&cpu_buffer->lock); 3412 arch_spin_unlock(&cpu_buffer->lock);
3315 spin_unlock_irqrestore(&cpu_buffer->reader_lock, flags); 3413 spin_unlock_irqrestore(&cpu_buffer->reader_lock, flags);
3316
3317 return iter;
3318} 3414}
3319EXPORT_SYMBOL_GPL(ring_buffer_read_start); 3415EXPORT_SYMBOL_GPL(ring_buffer_read_start);
3320 3416
@@ -3408,6 +3504,9 @@ rb_reset_cpu(struct ring_buffer_per_cpu *cpu_buffer)
3408 cpu_buffer->write_stamp = 0; 3504 cpu_buffer->write_stamp = 0;
3409 cpu_buffer->read_stamp = 0; 3505 cpu_buffer->read_stamp = 0;
3410 3506
3507 cpu_buffer->lost_events = 0;
3508 cpu_buffer->last_overrun = 0;
3509
3411 rb_head_page_activate(cpu_buffer); 3510 rb_head_page_activate(cpu_buffer);
3412} 3511}
3413 3512
@@ -3683,6 +3782,7 @@ int ring_buffer_read_page(struct ring_buffer *buffer,
3683 struct ring_buffer_event *event; 3782 struct ring_buffer_event *event;
3684 struct buffer_data_page *bpage; 3783 struct buffer_data_page *bpage;
3685 struct buffer_page *reader; 3784 struct buffer_page *reader;
3785 unsigned long missed_events;
3686 unsigned long flags; 3786 unsigned long flags;
3687 unsigned int commit; 3787 unsigned int commit;
3688 unsigned int read; 3788 unsigned int read;
@@ -3719,6 +3819,9 @@ int ring_buffer_read_page(struct ring_buffer *buffer,
3719 read = reader->read; 3819 read = reader->read;
3720 commit = rb_page_commit(reader); 3820 commit = rb_page_commit(reader);
3721 3821
3822 /* Check if any events were dropped */
3823 missed_events = cpu_buffer->lost_events;
3824
3722 /* 3825 /*
3723 * If this page has been partially read or 3826 * If this page has been partially read or
3724 * if len is not big enough to read the rest of the page or 3827 * if len is not big enough to read the rest of the page or
@@ -3779,9 +3882,35 @@ int ring_buffer_read_page(struct ring_buffer *buffer,
3779 local_set(&reader->entries, 0); 3882 local_set(&reader->entries, 0);
3780 reader->read = 0; 3883 reader->read = 0;
3781 *data_page = bpage; 3884 *data_page = bpage;
3885
3886 /*
3887 * Use the real_end for the data size,
3888 * This gives us a chance to store the lost events
3889 * on the page.
3890 */
3891 if (reader->real_end)
3892 local_set(&bpage->commit, reader->real_end);
3782 } 3893 }
3783 ret = read; 3894 ret = read;
3784 3895
3896 cpu_buffer->lost_events = 0;
3897 /*
3898 * Set a flag in the commit field if we lost events
3899 */
3900 if (missed_events) {
3901 commit = local_read(&bpage->commit);
3902
3903 /* If there is room at the end of the page to save the
3904 * missed events, then record it there.
3905 */
3906 if (BUF_PAGE_SIZE - commit >= sizeof(missed_events)) {
3907 memcpy(&bpage->data[commit], &missed_events,
3908 sizeof(missed_events));
3909 local_add(RB_MISSED_STORED, &bpage->commit);
3910 }
3911 local_add(RB_MISSED_EVENTS, &bpage->commit);
3912 }
3913
3785 out_unlock: 3914 out_unlock:
3786 spin_unlock_irqrestore(&cpu_buffer->reader_lock, flags); 3915 spin_unlock_irqrestore(&cpu_buffer->reader_lock, flags);
3787 3916
diff --git a/kernel/trace/ring_buffer_benchmark.c b/kernel/trace/ring_buffer_benchmark.c
index df74c7982255..302f8a614635 100644
--- a/kernel/trace/ring_buffer_benchmark.c
+++ b/kernel/trace/ring_buffer_benchmark.c
@@ -81,7 +81,7 @@ static enum event_status read_event(int cpu)
81 int *entry; 81 int *entry;
82 u64 ts; 82 u64 ts;
83 83
84 event = ring_buffer_consume(buffer, cpu, &ts); 84 event = ring_buffer_consume(buffer, cpu, &ts, NULL);
85 if (!event) 85 if (!event)
86 return EVENT_DROPPED; 86 return EVENT_DROPPED;
87 87
@@ -113,7 +113,8 @@ static enum event_status read_page(int cpu)
113 ret = ring_buffer_read_page(buffer, &bpage, PAGE_SIZE, cpu, 1); 113 ret = ring_buffer_read_page(buffer, &bpage, PAGE_SIZE, cpu, 1);
114 if (ret >= 0) { 114 if (ret >= 0) {
115 rpage = bpage; 115 rpage = bpage;
116 commit = local_read(&rpage->commit); 116 /* The commit may have missed event flags set, clear them */
117 commit = local_read(&rpage->commit) & 0xfffff;
117 for (i = 0; i < commit && !kill_test; i += inc) { 118 for (i = 0; i < commit && !kill_test; i += inc) {
118 119
119 if (i >= (PAGE_SIZE - offsetof(struct rb_page, data))) { 120 if (i >= (PAGE_SIZE - offsetof(struct rb_page, data))) {
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 7b155a0e6f31..8a76339a9e65 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -117,9 +117,12 @@ static cpumask_var_t __read_mostly tracing_buffer_mask;
117 * 117 *
118 * It is default off, but you can enable it with either specifying 118 * It is default off, but you can enable it with either specifying
119 * "ftrace_dump_on_oops" in the kernel command line, or setting 119 * "ftrace_dump_on_oops" in the kernel command line, or setting
120 * /proc/sys/kernel/ftrace_dump_on_oops to true. 120 * /proc/sys/kernel/ftrace_dump_on_oops
121 * Set 1 if you want to dump buffers of all CPUs
122 * Set 2 if you want to dump the buffer of the CPU that triggered oops
121 */ 123 */
122int ftrace_dump_on_oops; 124
125enum ftrace_dump_mode ftrace_dump_on_oops;
123 126
124static int tracing_set_tracer(const char *buf); 127static int tracing_set_tracer(const char *buf);
125 128
@@ -139,8 +142,17 @@ __setup("ftrace=", set_cmdline_ftrace);
139 142
140static int __init set_ftrace_dump_on_oops(char *str) 143static int __init set_ftrace_dump_on_oops(char *str)
141{ 144{
142 ftrace_dump_on_oops = 1; 145 if (*str++ != '=' || !*str) {
143 return 1; 146 ftrace_dump_on_oops = DUMP_ALL;
147 return 1;
148 }
149
150 if (!strcmp("orig_cpu", str)) {
151 ftrace_dump_on_oops = DUMP_ORIG;
152 return 1;
153 }
154
155 return 0;
144} 156}
145__setup("ftrace_dump_on_oops", set_ftrace_dump_on_oops); 157__setup("ftrace_dump_on_oops", set_ftrace_dump_on_oops);
146 158
@@ -1545,7 +1557,8 @@ static void trace_iterator_increment(struct trace_iterator *iter)
1545} 1557}
1546 1558
1547static struct trace_entry * 1559static struct trace_entry *
1548peek_next_entry(struct trace_iterator *iter, int cpu, u64 *ts) 1560peek_next_entry(struct trace_iterator *iter, int cpu, u64 *ts,
1561 unsigned long *lost_events)
1549{ 1562{
1550 struct ring_buffer_event *event; 1563 struct ring_buffer_event *event;
1551 struct ring_buffer_iter *buf_iter = iter->buffer_iter[cpu]; 1564 struct ring_buffer_iter *buf_iter = iter->buffer_iter[cpu];
@@ -1556,7 +1569,8 @@ peek_next_entry(struct trace_iterator *iter, int cpu, u64 *ts)
1556 if (buf_iter) 1569 if (buf_iter)
1557 event = ring_buffer_iter_peek(buf_iter, ts); 1570 event = ring_buffer_iter_peek(buf_iter, ts);
1558 else 1571 else
1559 event = ring_buffer_peek(iter->tr->buffer, cpu, ts); 1572 event = ring_buffer_peek(iter->tr->buffer, cpu, ts,
1573 lost_events);
1560 1574
1561 ftrace_enable_cpu(); 1575 ftrace_enable_cpu();
1562 1576
@@ -1564,10 +1578,12 @@ peek_next_entry(struct trace_iterator *iter, int cpu, u64 *ts)
1564} 1578}
1565 1579
1566static struct trace_entry * 1580static struct trace_entry *
1567__find_next_entry(struct trace_iterator *iter, int *ent_cpu, u64 *ent_ts) 1581__find_next_entry(struct trace_iterator *iter, int *ent_cpu,
1582 unsigned long *missing_events, u64 *ent_ts)
1568{ 1583{
1569 struct ring_buffer *buffer = iter->tr->buffer; 1584 struct ring_buffer *buffer = iter->tr->buffer;
1570 struct trace_entry *ent, *next = NULL; 1585 struct trace_entry *ent, *next = NULL;
1586 unsigned long lost_events = 0, next_lost = 0;
1571 int cpu_file = iter->cpu_file; 1587 int cpu_file = iter->cpu_file;
1572 u64 next_ts = 0, ts; 1588 u64 next_ts = 0, ts;
1573 int next_cpu = -1; 1589 int next_cpu = -1;
@@ -1580,7 +1596,7 @@ __find_next_entry(struct trace_iterator *iter, int *ent_cpu, u64 *ent_ts)
1580 if (cpu_file > TRACE_PIPE_ALL_CPU) { 1596 if (cpu_file > TRACE_PIPE_ALL_CPU) {
1581 if (ring_buffer_empty_cpu(buffer, cpu_file)) 1597 if (ring_buffer_empty_cpu(buffer, cpu_file))
1582 return NULL; 1598 return NULL;
1583 ent = peek_next_entry(iter, cpu_file, ent_ts); 1599 ent = peek_next_entry(iter, cpu_file, ent_ts, missing_events);
1584 if (ent_cpu) 1600 if (ent_cpu)
1585 *ent_cpu = cpu_file; 1601 *ent_cpu = cpu_file;
1586 1602
@@ -1592,7 +1608,7 @@ __find_next_entry(struct trace_iterator *iter, int *ent_cpu, u64 *ent_ts)
1592 if (ring_buffer_empty_cpu(buffer, cpu)) 1608 if (ring_buffer_empty_cpu(buffer, cpu))
1593 continue; 1609 continue;
1594 1610
1595 ent = peek_next_entry(iter, cpu, &ts); 1611 ent = peek_next_entry(iter, cpu, &ts, &lost_events);
1596 1612
1597 /* 1613 /*
1598 * Pick the entry with the smallest timestamp: 1614 * Pick the entry with the smallest timestamp:
@@ -1601,6 +1617,7 @@ __find_next_entry(struct trace_iterator *iter, int *ent_cpu, u64 *ent_ts)
1601 next = ent; 1617 next = ent;
1602 next_cpu = cpu; 1618 next_cpu = cpu;
1603 next_ts = ts; 1619 next_ts = ts;
1620 next_lost = lost_events;
1604 } 1621 }
1605 } 1622 }
1606 1623
@@ -1610,6 +1627,9 @@ __find_next_entry(struct trace_iterator *iter, int *ent_cpu, u64 *ent_ts)
1610 if (ent_ts) 1627 if (ent_ts)
1611 *ent_ts = next_ts; 1628 *ent_ts = next_ts;
1612 1629
1630 if (missing_events)
1631 *missing_events = next_lost;
1632
1613 return next; 1633 return next;
1614} 1634}
1615 1635
@@ -1617,13 +1637,14 @@ __find_next_entry(struct trace_iterator *iter, int *ent_cpu, u64 *ent_ts)
1617struct trace_entry *trace_find_next_entry(struct trace_iterator *iter, 1637struct trace_entry *trace_find_next_entry(struct trace_iterator *iter,
1618 int *ent_cpu, u64 *ent_ts) 1638 int *ent_cpu, u64 *ent_ts)
1619{ 1639{
1620 return __find_next_entry(iter, ent_cpu, ent_ts); 1640 return __find_next_entry(iter, ent_cpu, NULL, ent_ts);
1621} 1641}
1622 1642
1623/* Find the next real entry, and increment the iterator to the next entry */ 1643/* Find the next real entry, and increment the iterator to the next entry */
1624static void *find_next_entry_inc(struct trace_iterator *iter) 1644static void *find_next_entry_inc(struct trace_iterator *iter)
1625{ 1645{
1626 iter->ent = __find_next_entry(iter, &iter->cpu, &iter->ts); 1646 iter->ent = __find_next_entry(iter, &iter->cpu,
1647 &iter->lost_events, &iter->ts);
1627 1648
1628 if (iter->ent) 1649 if (iter->ent)
1629 trace_iterator_increment(iter); 1650 trace_iterator_increment(iter);
@@ -1635,7 +1656,8 @@ static void trace_consume(struct trace_iterator *iter)
1635{ 1656{
1636 /* Don't allow ftrace to trace into the ring buffers */ 1657 /* Don't allow ftrace to trace into the ring buffers */
1637 ftrace_disable_cpu(); 1658 ftrace_disable_cpu();
1638 ring_buffer_consume(iter->tr->buffer, iter->cpu, &iter->ts); 1659 ring_buffer_consume(iter->tr->buffer, iter->cpu, &iter->ts,
1660 &iter->lost_events);
1639 ftrace_enable_cpu(); 1661 ftrace_enable_cpu();
1640} 1662}
1641 1663
@@ -1786,7 +1808,7 @@ static void print_func_help_header(struct seq_file *m)
1786} 1808}
1787 1809
1788 1810
1789static void 1811void
1790print_trace_header(struct seq_file *m, struct trace_iterator *iter) 1812print_trace_header(struct seq_file *m, struct trace_iterator *iter)
1791{ 1813{
1792 unsigned long sym_flags = (trace_flags & TRACE_ITER_SYM_MASK); 1814 unsigned long sym_flags = (trace_flags & TRACE_ITER_SYM_MASK);
@@ -1995,7 +2017,7 @@ static enum print_line_t print_bin_fmt(struct trace_iterator *iter)
1995 return event ? event->binary(iter, 0) : TRACE_TYPE_HANDLED; 2017 return event ? event->binary(iter, 0) : TRACE_TYPE_HANDLED;
1996} 2018}
1997 2019
1998static int trace_empty(struct trace_iterator *iter) 2020int trace_empty(struct trace_iterator *iter)
1999{ 2021{
2000 int cpu; 2022 int cpu;
2001 2023
@@ -2030,6 +2052,10 @@ static enum print_line_t print_trace_line(struct trace_iterator *iter)
2030{ 2052{
2031 enum print_line_t ret; 2053 enum print_line_t ret;
2032 2054
2055 if (iter->lost_events)
2056 trace_seq_printf(&iter->seq, "CPU:%d [LOST %lu EVENTS]\n",
2057 iter->cpu, iter->lost_events);
2058
2033 if (iter->trace && iter->trace->print_line) { 2059 if (iter->trace && iter->trace->print_line) {
2034 ret = iter->trace->print_line(iter); 2060 ret = iter->trace->print_line(iter);
2035 if (ret != TRACE_TYPE_UNHANDLED) 2061 if (ret != TRACE_TYPE_UNHANDLED)
@@ -2058,6 +2084,23 @@ static enum print_line_t print_trace_line(struct trace_iterator *iter)
2058 return print_trace_fmt(iter); 2084 return print_trace_fmt(iter);
2059} 2085}
2060 2086
2087void trace_default_header(struct seq_file *m)
2088{
2089 struct trace_iterator *iter = m->private;
2090
2091 if (iter->iter_flags & TRACE_FILE_LAT_FMT) {
2092 /* print nothing if the buffers are empty */
2093 if (trace_empty(iter))
2094 return;
2095 print_trace_header(m, iter);
2096 if (!(trace_flags & TRACE_ITER_VERBOSE))
2097 print_lat_help_header(m);
2098 } else {
2099 if (!(trace_flags & TRACE_ITER_VERBOSE))
2100 print_func_help_header(m);
2101 }
2102}
2103
2061static int s_show(struct seq_file *m, void *v) 2104static int s_show(struct seq_file *m, void *v)
2062{ 2105{
2063 struct trace_iterator *iter = v; 2106 struct trace_iterator *iter = v;
@@ -2070,17 +2113,9 @@ static int s_show(struct seq_file *m, void *v)
2070 } 2113 }
2071 if (iter->trace && iter->trace->print_header) 2114 if (iter->trace && iter->trace->print_header)
2072 iter->trace->print_header(m); 2115 iter->trace->print_header(m);
2073 else if (iter->iter_flags & TRACE_FILE_LAT_FMT) { 2116 else
2074 /* print nothing if the buffers are empty */ 2117 trace_default_header(m);
2075 if (trace_empty(iter)) 2118
2076 return 0;
2077 print_trace_header(m, iter);
2078 if (!(trace_flags & TRACE_ITER_VERBOSE))
2079 print_lat_help_header(m);
2080 } else {
2081 if (!(trace_flags & TRACE_ITER_VERBOSE))
2082 print_func_help_header(m);
2083 }
2084 } else if (iter->leftover) { 2119 } else if (iter->leftover) {
2085 /* 2120 /*
2086 * If we filled the seq_file buffer earlier, we 2121 * If we filled the seq_file buffer earlier, we
@@ -2166,15 +2201,20 @@ __tracing_open(struct inode *inode, struct file *file)
2166 2201
2167 if (iter->cpu_file == TRACE_PIPE_ALL_CPU) { 2202 if (iter->cpu_file == TRACE_PIPE_ALL_CPU) {
2168 for_each_tracing_cpu(cpu) { 2203 for_each_tracing_cpu(cpu) {
2169
2170 iter->buffer_iter[cpu] = 2204 iter->buffer_iter[cpu] =
2171 ring_buffer_read_start(iter->tr->buffer, cpu); 2205 ring_buffer_read_prepare(iter->tr->buffer, cpu);
2206 }
2207 ring_buffer_read_prepare_sync();
2208 for_each_tracing_cpu(cpu) {
2209 ring_buffer_read_start(iter->buffer_iter[cpu]);
2172 tracing_iter_reset(iter, cpu); 2210 tracing_iter_reset(iter, cpu);
2173 } 2211 }
2174 } else { 2212 } else {
2175 cpu = iter->cpu_file; 2213 cpu = iter->cpu_file;
2176 iter->buffer_iter[cpu] = 2214 iter->buffer_iter[cpu] =
2177 ring_buffer_read_start(iter->tr->buffer, cpu); 2215 ring_buffer_read_prepare(iter->tr->buffer, cpu);
2216 ring_buffer_read_prepare_sync();
2217 ring_buffer_read_start(iter->buffer_iter[cpu]);
2178 tracing_iter_reset(iter, cpu); 2218 tracing_iter_reset(iter, cpu);
2179 } 2219 }
2180 2220
@@ -4336,7 +4376,7 @@ static int trace_panic_handler(struct notifier_block *this,
4336 unsigned long event, void *unused) 4376 unsigned long event, void *unused)
4337{ 4377{
4338 if (ftrace_dump_on_oops) 4378 if (ftrace_dump_on_oops)
4339 ftrace_dump(); 4379 ftrace_dump(ftrace_dump_on_oops);
4340 return NOTIFY_OK; 4380 return NOTIFY_OK;
4341} 4381}
4342 4382
@@ -4353,7 +4393,7 @@ static int trace_die_handler(struct notifier_block *self,
4353 switch (val) { 4393 switch (val) {
4354 case DIE_OOPS: 4394 case DIE_OOPS:
4355 if (ftrace_dump_on_oops) 4395 if (ftrace_dump_on_oops)
4356 ftrace_dump(); 4396 ftrace_dump(ftrace_dump_on_oops);
4357 break; 4397 break;
4358 default: 4398 default:
4359 break; 4399 break;
@@ -4394,7 +4434,8 @@ trace_printk_seq(struct trace_seq *s)
4394 trace_seq_init(s); 4434 trace_seq_init(s);
4395} 4435}
4396 4436
4397static void __ftrace_dump(bool disable_tracing) 4437static void
4438__ftrace_dump(bool disable_tracing, enum ftrace_dump_mode oops_dump_mode)
4398{ 4439{
4399 static arch_spinlock_t ftrace_dump_lock = 4440 static arch_spinlock_t ftrace_dump_lock =
4400 (arch_spinlock_t)__ARCH_SPIN_LOCK_UNLOCKED; 4441 (arch_spinlock_t)__ARCH_SPIN_LOCK_UNLOCKED;
@@ -4427,12 +4468,25 @@ static void __ftrace_dump(bool disable_tracing)
4427 /* don't look at user memory in panic mode */ 4468 /* don't look at user memory in panic mode */
4428 trace_flags &= ~TRACE_ITER_SYM_USEROBJ; 4469 trace_flags &= ~TRACE_ITER_SYM_USEROBJ;
4429 4470
4430 printk(KERN_TRACE "Dumping ftrace buffer:\n");
4431
4432 /* Simulate the iterator */ 4471 /* Simulate the iterator */
4433 iter.tr = &global_trace; 4472 iter.tr = &global_trace;
4434 iter.trace = current_trace; 4473 iter.trace = current_trace;
4435 iter.cpu_file = TRACE_PIPE_ALL_CPU; 4474
4475 switch (oops_dump_mode) {
4476 case DUMP_ALL:
4477 iter.cpu_file = TRACE_PIPE_ALL_CPU;
4478 break;
4479 case DUMP_ORIG:
4480 iter.cpu_file = raw_smp_processor_id();
4481 break;
4482 case DUMP_NONE:
4483 goto out_enable;
4484 default:
4485 printk(KERN_TRACE "Bad dumping mode, switching to all CPUs dump\n");
4486 iter.cpu_file = TRACE_PIPE_ALL_CPU;
4487 }
4488
4489 printk(KERN_TRACE "Dumping ftrace buffer:\n");
4436 4490
4437 /* 4491 /*
4438 * We need to stop all tracing on all CPUS to read the 4492 * We need to stop all tracing on all CPUS to read the
@@ -4471,6 +4525,7 @@ static void __ftrace_dump(bool disable_tracing)
4471 else 4525 else
4472 printk(KERN_TRACE "---------------------------------\n"); 4526 printk(KERN_TRACE "---------------------------------\n");
4473 4527
4528 out_enable:
4474 /* Re-enable tracing if requested */ 4529 /* Re-enable tracing if requested */
4475 if (!disable_tracing) { 4530 if (!disable_tracing) {
4476 trace_flags |= old_userobj; 4531 trace_flags |= old_userobj;
@@ -4487,9 +4542,9 @@ static void __ftrace_dump(bool disable_tracing)
4487} 4542}
4488 4543
4489/* By default: disable tracing after the dump */ 4544/* By default: disable tracing after the dump */
4490void ftrace_dump(void) 4545void ftrace_dump(enum ftrace_dump_mode oops_dump_mode)
4491{ 4546{
4492 __ftrace_dump(true); 4547 __ftrace_dump(true, oops_dump_mode);
4493} 4548}
4494 4549
4495__init static int tracer_alloc_buffers(void) 4550__init static int tracer_alloc_buffers(void)
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index 2825ef2c0b15..d1ce0bec1b3f 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -34,7 +34,6 @@ enum trace_type {
34 TRACE_GRAPH_RET, 34 TRACE_GRAPH_RET,
35 TRACE_GRAPH_ENT, 35 TRACE_GRAPH_ENT,
36 TRACE_USER_STACK, 36 TRACE_USER_STACK,
37 TRACE_HW_BRANCHES,
38 TRACE_KMEM_ALLOC, 37 TRACE_KMEM_ALLOC,
39 TRACE_KMEM_FREE, 38 TRACE_KMEM_FREE,
40 TRACE_BLK, 39 TRACE_BLK,
@@ -103,29 +102,17 @@ struct syscall_trace_exit {
103 long ret; 102 long ret;
104}; 103};
105 104
106struct kprobe_trace_entry { 105struct kprobe_trace_entry_head {
107 struct trace_entry ent; 106 struct trace_entry ent;
108 unsigned long ip; 107 unsigned long ip;
109 int nargs;
110 unsigned long args[];
111}; 108};
112 109
113#define SIZEOF_KPROBE_TRACE_ENTRY(n) \ 110struct kretprobe_trace_entry_head {
114 (offsetof(struct kprobe_trace_entry, args) + \
115 (sizeof(unsigned long) * (n)))
116
117struct kretprobe_trace_entry {
118 struct trace_entry ent; 111 struct trace_entry ent;
119 unsigned long func; 112 unsigned long func;
120 unsigned long ret_ip; 113 unsigned long ret_ip;
121 int nargs;
122 unsigned long args[];
123}; 114};
124 115
125#define SIZEOF_KRETPROBE_TRACE_ENTRY(n) \
126 (offsetof(struct kretprobe_trace_entry, args) + \
127 (sizeof(unsigned long) * (n)))
128
129/* 116/*
130 * trace_flag_type is an enumeration that holds different 117 * trace_flag_type is an enumeration that holds different
131 * states when a trace occurs. These are: 118 * states when a trace occurs. These are:
@@ -229,7 +216,6 @@ extern void __ftrace_bad_type(void);
229 TRACE_GRAPH_ENT); \ 216 TRACE_GRAPH_ENT); \
230 IF_ASSIGN(var, ent, struct ftrace_graph_ret_entry, \ 217 IF_ASSIGN(var, ent, struct ftrace_graph_ret_entry, \
231 TRACE_GRAPH_RET); \ 218 TRACE_GRAPH_RET); \
232 IF_ASSIGN(var, ent, struct hw_branch_entry, TRACE_HW_BRANCHES);\
233 IF_ASSIGN(var, ent, struct kmemtrace_alloc_entry, \ 219 IF_ASSIGN(var, ent, struct kmemtrace_alloc_entry, \
234 TRACE_KMEM_ALLOC); \ 220 TRACE_KMEM_ALLOC); \
235 IF_ASSIGN(var, ent, struct kmemtrace_free_entry, \ 221 IF_ASSIGN(var, ent, struct kmemtrace_free_entry, \
@@ -378,6 +364,9 @@ void trace_function(struct trace_array *tr,
378 unsigned long ip, 364 unsigned long ip,
379 unsigned long parent_ip, 365 unsigned long parent_ip,
380 unsigned long flags, int pc); 366 unsigned long flags, int pc);
367void trace_default_header(struct seq_file *m);
368void print_trace_header(struct seq_file *m, struct trace_iterator *iter);
369int trace_empty(struct trace_iterator *iter);
381 370
382void trace_graph_return(struct ftrace_graph_ret *trace); 371void trace_graph_return(struct ftrace_graph_ret *trace);
383int trace_graph_entry(struct ftrace_graph_ent *trace); 372int trace_graph_entry(struct ftrace_graph_ent *trace);
@@ -467,8 +456,6 @@ extern int trace_selftest_startup_sysprof(struct tracer *trace,
467 struct trace_array *tr); 456 struct trace_array *tr);
468extern int trace_selftest_startup_branch(struct tracer *trace, 457extern int trace_selftest_startup_branch(struct tracer *trace,
469 struct trace_array *tr); 458 struct trace_array *tr);
470extern int trace_selftest_startup_hw_branches(struct tracer *trace,
471 struct trace_array *tr);
472extern int trace_selftest_startup_ksym(struct tracer *trace, 459extern int trace_selftest_startup_ksym(struct tracer *trace,
473 struct trace_array *tr); 460 struct trace_array *tr);
474#endif /* CONFIG_FTRACE_STARTUP_TEST */ 461#endif /* CONFIG_FTRACE_STARTUP_TEST */
@@ -491,9 +478,29 @@ extern int trace_clock_id;
491 478
492/* Standard output formatting function used for function return traces */ 479/* Standard output formatting function used for function return traces */
493#ifdef CONFIG_FUNCTION_GRAPH_TRACER 480#ifdef CONFIG_FUNCTION_GRAPH_TRACER
494extern enum print_line_t print_graph_function(struct trace_iterator *iter); 481
482/* Flag options */
483#define TRACE_GRAPH_PRINT_OVERRUN 0x1
484#define TRACE_GRAPH_PRINT_CPU 0x2
485#define TRACE_GRAPH_PRINT_OVERHEAD 0x4
486#define TRACE_GRAPH_PRINT_PROC 0x8
487#define TRACE_GRAPH_PRINT_DURATION 0x10
488#define TRACE_GRAPH_PRINT_ABS_TIME 0x20
489
490extern enum print_line_t
491print_graph_function_flags(struct trace_iterator *iter, u32 flags);
492extern void print_graph_headers_flags(struct seq_file *s, u32 flags);
495extern enum print_line_t 493extern enum print_line_t
496trace_print_graph_duration(unsigned long long duration, struct trace_seq *s); 494trace_print_graph_duration(unsigned long long duration, struct trace_seq *s);
495extern void graph_trace_open(struct trace_iterator *iter);
496extern void graph_trace_close(struct trace_iterator *iter);
497extern int __trace_graph_entry(struct trace_array *tr,
498 struct ftrace_graph_ent *trace,
499 unsigned long flags, int pc);
500extern void __trace_graph_return(struct trace_array *tr,
501 struct ftrace_graph_ret *trace,
502 unsigned long flags, int pc);
503
497 504
498#ifdef CONFIG_DYNAMIC_FTRACE 505#ifdef CONFIG_DYNAMIC_FTRACE
499/* TODO: make this variable */ 506/* TODO: make this variable */
@@ -524,7 +531,7 @@ static inline int ftrace_graph_addr(unsigned long addr)
524#endif /* CONFIG_DYNAMIC_FTRACE */ 531#endif /* CONFIG_DYNAMIC_FTRACE */
525#else /* CONFIG_FUNCTION_GRAPH_TRACER */ 532#else /* CONFIG_FUNCTION_GRAPH_TRACER */
526static inline enum print_line_t 533static inline enum print_line_t
527print_graph_function(struct trace_iterator *iter) 534print_graph_function_flags(struct trace_iterator *iter, u32 flags)
528{ 535{
529 return TRACE_TYPE_UNHANDLED; 536 return TRACE_TYPE_UNHANDLED;
530} 537}
diff --git a/kernel/trace/trace_entries.h b/kernel/trace/trace_entries.h
index c16a08f399df..dc008c1240da 100644
--- a/kernel/trace/trace_entries.h
+++ b/kernel/trace/trace_entries.h
@@ -318,18 +318,6 @@ FTRACE_ENTRY(branch, trace_branch,
318 __entry->func, __entry->file, __entry->correct) 318 __entry->func, __entry->file, __entry->correct)
319); 319);
320 320
321FTRACE_ENTRY(hw_branch, hw_branch_entry,
322
323 TRACE_HW_BRANCHES,
324
325 F_STRUCT(
326 __field( u64, from )
327 __field( u64, to )
328 ),
329
330 F_printk("from: %llx to: %llx", __entry->from, __entry->to)
331);
332
333FTRACE_ENTRY(kmem_alloc, kmemtrace_alloc_entry, 321FTRACE_ENTRY(kmem_alloc, kmemtrace_alloc_entry,
334 322
335 TRACE_KMEM_ALLOC, 323 TRACE_KMEM_ALLOC,
diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c
index 88c0b6dbd7fe..58092d844a1f 100644
--- a/kernel/trace/trace_events_filter.c
+++ b/kernel/trace/trace_events_filter.c
@@ -1398,7 +1398,7 @@ int ftrace_profile_set_filter(struct perf_event *event, int event_id,
1398 } 1398 }
1399 1399
1400 err = -EINVAL; 1400 err = -EINVAL;
1401 if (!call) 1401 if (&call->list == &ftrace_events)
1402 goto out_unlock; 1402 goto out_unlock;
1403 1403
1404 err = -EEXIST; 1404 err = -EEXIST;
diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c
index 9aed1a5cf553..dd11c830eb84 100644
--- a/kernel/trace/trace_functions_graph.c
+++ b/kernel/trace/trace_functions_graph.c
@@ -40,7 +40,7 @@ struct fgraph_data {
40#define TRACE_GRAPH_PRINT_OVERHEAD 0x4 40#define TRACE_GRAPH_PRINT_OVERHEAD 0x4
41#define TRACE_GRAPH_PRINT_PROC 0x8 41#define TRACE_GRAPH_PRINT_PROC 0x8
42#define TRACE_GRAPH_PRINT_DURATION 0x10 42#define TRACE_GRAPH_PRINT_DURATION 0x10
43#define TRACE_GRAPH_PRINT_ABS_TIME 0X20 43#define TRACE_GRAPH_PRINT_ABS_TIME 0x20
44 44
45static struct tracer_opt trace_opts[] = { 45static struct tracer_opt trace_opts[] = {
46 /* Display overruns? (for self-debug purpose) */ 46 /* Display overruns? (for self-debug purpose) */
@@ -179,7 +179,7 @@ unsigned long ftrace_return_to_handler(unsigned long frame_pointer)
179 return ret; 179 return ret;
180} 180}
181 181
182static int __trace_graph_entry(struct trace_array *tr, 182int __trace_graph_entry(struct trace_array *tr,
183 struct ftrace_graph_ent *trace, 183 struct ftrace_graph_ent *trace,
184 unsigned long flags, 184 unsigned long flags,
185 int pc) 185 int pc)
@@ -246,7 +246,7 @@ int trace_graph_thresh_entry(struct ftrace_graph_ent *trace)
246 return trace_graph_entry(trace); 246 return trace_graph_entry(trace);
247} 247}
248 248
249static void __trace_graph_return(struct trace_array *tr, 249void __trace_graph_return(struct trace_array *tr,
250 struct ftrace_graph_ret *trace, 250 struct ftrace_graph_ret *trace,
251 unsigned long flags, 251 unsigned long flags,
252 int pc) 252 int pc)
@@ -490,9 +490,10 @@ get_return_for_leaf(struct trace_iterator *iter,
490 * We need to consume the current entry to see 490 * We need to consume the current entry to see
491 * the next one. 491 * the next one.
492 */ 492 */
493 ring_buffer_consume(iter->tr->buffer, iter->cpu, NULL); 493 ring_buffer_consume(iter->tr->buffer, iter->cpu,
494 NULL, NULL);
494 event = ring_buffer_peek(iter->tr->buffer, iter->cpu, 495 event = ring_buffer_peek(iter->tr->buffer, iter->cpu,
495 NULL); 496 NULL, NULL);
496 } 497 }
497 498
498 if (!event) 499 if (!event)
@@ -526,17 +527,18 @@ get_return_for_leaf(struct trace_iterator *iter,
526 527
527/* Signal a overhead of time execution to the output */ 528/* Signal a overhead of time execution to the output */
528static int 529static int
529print_graph_overhead(unsigned long long duration, struct trace_seq *s) 530print_graph_overhead(unsigned long long duration, struct trace_seq *s,
531 u32 flags)
530{ 532{
531 /* If duration disappear, we don't need anything */ 533 /* If duration disappear, we don't need anything */
532 if (!(tracer_flags.val & TRACE_GRAPH_PRINT_DURATION)) 534 if (!(flags & TRACE_GRAPH_PRINT_DURATION))
533 return 1; 535 return 1;
534 536
535 /* Non nested entry or return */ 537 /* Non nested entry or return */
536 if (duration == -1) 538 if (duration == -1)
537 return trace_seq_printf(s, " "); 539 return trace_seq_printf(s, " ");
538 540
539 if (tracer_flags.val & TRACE_GRAPH_PRINT_OVERHEAD) { 541 if (flags & TRACE_GRAPH_PRINT_OVERHEAD) {
540 /* Duration exceeded 100 msecs */ 542 /* Duration exceeded 100 msecs */
541 if (duration > 100000ULL) 543 if (duration > 100000ULL)
542 return trace_seq_printf(s, "! "); 544 return trace_seq_printf(s, "! ");
@@ -562,7 +564,7 @@ static int print_graph_abs_time(u64 t, struct trace_seq *s)
562 564
563static enum print_line_t 565static enum print_line_t
564print_graph_irq(struct trace_iterator *iter, unsigned long addr, 566print_graph_irq(struct trace_iterator *iter, unsigned long addr,
565 enum trace_type type, int cpu, pid_t pid) 567 enum trace_type type, int cpu, pid_t pid, u32 flags)
566{ 568{
567 int ret; 569 int ret;
568 struct trace_seq *s = &iter->seq; 570 struct trace_seq *s = &iter->seq;
@@ -572,21 +574,21 @@ print_graph_irq(struct trace_iterator *iter, unsigned long addr,
572 return TRACE_TYPE_UNHANDLED; 574 return TRACE_TYPE_UNHANDLED;
573 575
574 /* Absolute time */ 576 /* Absolute time */
575 if (tracer_flags.val & TRACE_GRAPH_PRINT_ABS_TIME) { 577 if (flags & TRACE_GRAPH_PRINT_ABS_TIME) {
576 ret = print_graph_abs_time(iter->ts, s); 578 ret = print_graph_abs_time(iter->ts, s);
577 if (!ret) 579 if (!ret)
578 return TRACE_TYPE_PARTIAL_LINE; 580 return TRACE_TYPE_PARTIAL_LINE;
579 } 581 }
580 582
581 /* Cpu */ 583 /* Cpu */
582 if (tracer_flags.val & TRACE_GRAPH_PRINT_CPU) { 584 if (flags & TRACE_GRAPH_PRINT_CPU) {
583 ret = print_graph_cpu(s, cpu); 585 ret = print_graph_cpu(s, cpu);
584 if (ret == TRACE_TYPE_PARTIAL_LINE) 586 if (ret == TRACE_TYPE_PARTIAL_LINE)
585 return TRACE_TYPE_PARTIAL_LINE; 587 return TRACE_TYPE_PARTIAL_LINE;
586 } 588 }
587 589
588 /* Proc */ 590 /* Proc */
589 if (tracer_flags.val & TRACE_GRAPH_PRINT_PROC) { 591 if (flags & TRACE_GRAPH_PRINT_PROC) {
590 ret = print_graph_proc(s, pid); 592 ret = print_graph_proc(s, pid);
591 if (ret == TRACE_TYPE_PARTIAL_LINE) 593 if (ret == TRACE_TYPE_PARTIAL_LINE)
592 return TRACE_TYPE_PARTIAL_LINE; 594 return TRACE_TYPE_PARTIAL_LINE;
@@ -596,7 +598,7 @@ print_graph_irq(struct trace_iterator *iter, unsigned long addr,
596 } 598 }
597 599
598 /* No overhead */ 600 /* No overhead */
599 ret = print_graph_overhead(-1, s); 601 ret = print_graph_overhead(-1, s, flags);
600 if (!ret) 602 if (!ret)
601 return TRACE_TYPE_PARTIAL_LINE; 603 return TRACE_TYPE_PARTIAL_LINE;
602 604
@@ -609,7 +611,7 @@ print_graph_irq(struct trace_iterator *iter, unsigned long addr,
609 return TRACE_TYPE_PARTIAL_LINE; 611 return TRACE_TYPE_PARTIAL_LINE;
610 612
611 /* Don't close the duration column if haven't one */ 613 /* Don't close the duration column if haven't one */
612 if (tracer_flags.val & TRACE_GRAPH_PRINT_DURATION) 614 if (flags & TRACE_GRAPH_PRINT_DURATION)
613 trace_seq_printf(s, " |"); 615 trace_seq_printf(s, " |");
614 ret = trace_seq_printf(s, "\n"); 616 ret = trace_seq_printf(s, "\n");
615 617
@@ -679,7 +681,8 @@ print_graph_duration(unsigned long long duration, struct trace_seq *s)
679static enum print_line_t 681static enum print_line_t
680print_graph_entry_leaf(struct trace_iterator *iter, 682print_graph_entry_leaf(struct trace_iterator *iter,
681 struct ftrace_graph_ent_entry *entry, 683 struct ftrace_graph_ent_entry *entry,
682 struct ftrace_graph_ret_entry *ret_entry, struct trace_seq *s) 684 struct ftrace_graph_ret_entry *ret_entry,
685 struct trace_seq *s, u32 flags)
683{ 686{
684 struct fgraph_data *data = iter->private; 687 struct fgraph_data *data = iter->private;
685 struct ftrace_graph_ret *graph_ret; 688 struct ftrace_graph_ret *graph_ret;
@@ -711,12 +714,12 @@ print_graph_entry_leaf(struct trace_iterator *iter,
711 } 714 }
712 715
713 /* Overhead */ 716 /* Overhead */
714 ret = print_graph_overhead(duration, s); 717 ret = print_graph_overhead(duration, s, flags);
715 if (!ret) 718 if (!ret)
716 return TRACE_TYPE_PARTIAL_LINE; 719 return TRACE_TYPE_PARTIAL_LINE;
717 720
718 /* Duration */ 721 /* Duration */
719 if (tracer_flags.val & TRACE_GRAPH_PRINT_DURATION) { 722 if (flags & TRACE_GRAPH_PRINT_DURATION) {
720 ret = print_graph_duration(duration, s); 723 ret = print_graph_duration(duration, s);
721 if (ret == TRACE_TYPE_PARTIAL_LINE) 724 if (ret == TRACE_TYPE_PARTIAL_LINE)
722 return TRACE_TYPE_PARTIAL_LINE; 725 return TRACE_TYPE_PARTIAL_LINE;
@@ -739,7 +742,7 @@ print_graph_entry_leaf(struct trace_iterator *iter,
739static enum print_line_t 742static enum print_line_t
740print_graph_entry_nested(struct trace_iterator *iter, 743print_graph_entry_nested(struct trace_iterator *iter,
741 struct ftrace_graph_ent_entry *entry, 744 struct ftrace_graph_ent_entry *entry,
742 struct trace_seq *s, int cpu) 745 struct trace_seq *s, int cpu, u32 flags)
743{ 746{
744 struct ftrace_graph_ent *call = &entry->graph_ent; 747 struct ftrace_graph_ent *call = &entry->graph_ent;
745 struct fgraph_data *data = iter->private; 748 struct fgraph_data *data = iter->private;
@@ -759,12 +762,12 @@ print_graph_entry_nested(struct trace_iterator *iter,
759 } 762 }
760 763
761 /* No overhead */ 764 /* No overhead */
762 ret = print_graph_overhead(-1, s); 765 ret = print_graph_overhead(-1, s, flags);
763 if (!ret) 766 if (!ret)
764 return TRACE_TYPE_PARTIAL_LINE; 767 return TRACE_TYPE_PARTIAL_LINE;
765 768
766 /* No time */ 769 /* No time */
767 if (tracer_flags.val & TRACE_GRAPH_PRINT_DURATION) { 770 if (flags & TRACE_GRAPH_PRINT_DURATION) {
768 ret = trace_seq_printf(s, " | "); 771 ret = trace_seq_printf(s, " | ");
769 if (!ret) 772 if (!ret)
770 return TRACE_TYPE_PARTIAL_LINE; 773 return TRACE_TYPE_PARTIAL_LINE;
@@ -790,7 +793,7 @@ print_graph_entry_nested(struct trace_iterator *iter,
790 793
791static enum print_line_t 794static enum print_line_t
792print_graph_prologue(struct trace_iterator *iter, struct trace_seq *s, 795print_graph_prologue(struct trace_iterator *iter, struct trace_seq *s,
793 int type, unsigned long addr) 796 int type, unsigned long addr, u32 flags)
794{ 797{
795 struct fgraph_data *data = iter->private; 798 struct fgraph_data *data = iter->private;
796 struct trace_entry *ent = iter->ent; 799 struct trace_entry *ent = iter->ent;
@@ -803,27 +806,27 @@ print_graph_prologue(struct trace_iterator *iter, struct trace_seq *s,
803 806
804 if (type) { 807 if (type) {
805 /* Interrupt */ 808 /* Interrupt */
806 ret = print_graph_irq(iter, addr, type, cpu, ent->pid); 809 ret = print_graph_irq(iter, addr, type, cpu, ent->pid, flags);
807 if (ret == TRACE_TYPE_PARTIAL_LINE) 810 if (ret == TRACE_TYPE_PARTIAL_LINE)
808 return TRACE_TYPE_PARTIAL_LINE; 811 return TRACE_TYPE_PARTIAL_LINE;
809 } 812 }
810 813
811 /* Absolute time */ 814 /* Absolute time */
812 if (tracer_flags.val & TRACE_GRAPH_PRINT_ABS_TIME) { 815 if (flags & TRACE_GRAPH_PRINT_ABS_TIME) {
813 ret = print_graph_abs_time(iter->ts, s); 816 ret = print_graph_abs_time(iter->ts, s);
814 if (!ret) 817 if (!ret)
815 return TRACE_TYPE_PARTIAL_LINE; 818 return TRACE_TYPE_PARTIAL_LINE;
816 } 819 }
817 820
818 /* Cpu */ 821 /* Cpu */
819 if (tracer_flags.val & TRACE_GRAPH_PRINT_CPU) { 822 if (flags & TRACE_GRAPH_PRINT_CPU) {
820 ret = print_graph_cpu(s, cpu); 823 ret = print_graph_cpu(s, cpu);
821 if (ret == TRACE_TYPE_PARTIAL_LINE) 824 if (ret == TRACE_TYPE_PARTIAL_LINE)
822 return TRACE_TYPE_PARTIAL_LINE; 825 return TRACE_TYPE_PARTIAL_LINE;
823 } 826 }
824 827
825 /* Proc */ 828 /* Proc */
826 if (tracer_flags.val & TRACE_GRAPH_PRINT_PROC) { 829 if (flags & TRACE_GRAPH_PRINT_PROC) {
827 ret = print_graph_proc(s, ent->pid); 830 ret = print_graph_proc(s, ent->pid);
828 if (ret == TRACE_TYPE_PARTIAL_LINE) 831 if (ret == TRACE_TYPE_PARTIAL_LINE)
829 return TRACE_TYPE_PARTIAL_LINE; 832 return TRACE_TYPE_PARTIAL_LINE;
@@ -845,7 +848,7 @@ print_graph_prologue(struct trace_iterator *iter, struct trace_seq *s,
845 848
846static enum print_line_t 849static enum print_line_t
847print_graph_entry(struct ftrace_graph_ent_entry *field, struct trace_seq *s, 850print_graph_entry(struct ftrace_graph_ent_entry *field, struct trace_seq *s,
848 struct trace_iterator *iter) 851 struct trace_iterator *iter, u32 flags)
849{ 852{
850 struct fgraph_data *data = iter->private; 853 struct fgraph_data *data = iter->private;
851 struct ftrace_graph_ent *call = &field->graph_ent; 854 struct ftrace_graph_ent *call = &field->graph_ent;
@@ -853,14 +856,14 @@ print_graph_entry(struct ftrace_graph_ent_entry *field, struct trace_seq *s,
853 static enum print_line_t ret; 856 static enum print_line_t ret;
854 int cpu = iter->cpu; 857 int cpu = iter->cpu;
855 858
856 if (print_graph_prologue(iter, s, TRACE_GRAPH_ENT, call->func)) 859 if (print_graph_prologue(iter, s, TRACE_GRAPH_ENT, call->func, flags))
857 return TRACE_TYPE_PARTIAL_LINE; 860 return TRACE_TYPE_PARTIAL_LINE;
858 861
859 leaf_ret = get_return_for_leaf(iter, field); 862 leaf_ret = get_return_for_leaf(iter, field);
860 if (leaf_ret) 863 if (leaf_ret)
861 ret = print_graph_entry_leaf(iter, field, leaf_ret, s); 864 ret = print_graph_entry_leaf(iter, field, leaf_ret, s, flags);
862 else 865 else
863 ret = print_graph_entry_nested(iter, field, s, cpu); 866 ret = print_graph_entry_nested(iter, field, s, cpu, flags);
864 867
865 if (data) { 868 if (data) {
866 /* 869 /*
@@ -879,7 +882,8 @@ print_graph_entry(struct ftrace_graph_ent_entry *field, struct trace_seq *s,
879 882
880static enum print_line_t 883static enum print_line_t
881print_graph_return(struct ftrace_graph_ret *trace, struct trace_seq *s, 884print_graph_return(struct ftrace_graph_ret *trace, struct trace_seq *s,
882 struct trace_entry *ent, struct trace_iterator *iter) 885 struct trace_entry *ent, struct trace_iterator *iter,
886 u32 flags)
883{ 887{
884 unsigned long long duration = trace->rettime - trace->calltime; 888 unsigned long long duration = trace->rettime - trace->calltime;
885 struct fgraph_data *data = iter->private; 889 struct fgraph_data *data = iter->private;
@@ -909,16 +913,16 @@ print_graph_return(struct ftrace_graph_ret *trace, struct trace_seq *s,
909 } 913 }
910 } 914 }
911 915
912 if (print_graph_prologue(iter, s, 0, 0)) 916 if (print_graph_prologue(iter, s, 0, 0, flags))
913 return TRACE_TYPE_PARTIAL_LINE; 917 return TRACE_TYPE_PARTIAL_LINE;
914 918
915 /* Overhead */ 919 /* Overhead */
916 ret = print_graph_overhead(duration, s); 920 ret = print_graph_overhead(duration, s, flags);
917 if (!ret) 921 if (!ret)
918 return TRACE_TYPE_PARTIAL_LINE; 922 return TRACE_TYPE_PARTIAL_LINE;
919 923
920 /* Duration */ 924 /* Duration */
921 if (tracer_flags.val & TRACE_GRAPH_PRINT_DURATION) { 925 if (flags & TRACE_GRAPH_PRINT_DURATION) {
922 ret = print_graph_duration(duration, s); 926 ret = print_graph_duration(duration, s);
923 if (ret == TRACE_TYPE_PARTIAL_LINE) 927 if (ret == TRACE_TYPE_PARTIAL_LINE)
924 return TRACE_TYPE_PARTIAL_LINE; 928 return TRACE_TYPE_PARTIAL_LINE;
@@ -948,14 +952,15 @@ print_graph_return(struct ftrace_graph_ret *trace, struct trace_seq *s,
948 } 952 }
949 953
950 /* Overrun */ 954 /* Overrun */
951 if (tracer_flags.val & TRACE_GRAPH_PRINT_OVERRUN) { 955 if (flags & TRACE_GRAPH_PRINT_OVERRUN) {
952 ret = trace_seq_printf(s, " (Overruns: %lu)\n", 956 ret = trace_seq_printf(s, " (Overruns: %lu)\n",
953 trace->overrun); 957 trace->overrun);
954 if (!ret) 958 if (!ret)
955 return TRACE_TYPE_PARTIAL_LINE; 959 return TRACE_TYPE_PARTIAL_LINE;
956 } 960 }
957 961
958 ret = print_graph_irq(iter, trace->func, TRACE_GRAPH_RET, cpu, pid); 962 ret = print_graph_irq(iter, trace->func, TRACE_GRAPH_RET,
963 cpu, pid, flags);
959 if (ret == TRACE_TYPE_PARTIAL_LINE) 964 if (ret == TRACE_TYPE_PARTIAL_LINE)
960 return TRACE_TYPE_PARTIAL_LINE; 965 return TRACE_TYPE_PARTIAL_LINE;
961 966
@@ -963,8 +968,8 @@ print_graph_return(struct ftrace_graph_ret *trace, struct trace_seq *s,
963} 968}
964 969
965static enum print_line_t 970static enum print_line_t
966print_graph_comment(struct trace_seq *s, struct trace_entry *ent, 971print_graph_comment(struct trace_seq *s, struct trace_entry *ent,
967 struct trace_iterator *iter) 972 struct trace_iterator *iter, u32 flags)
968{ 973{
969 unsigned long sym_flags = (trace_flags & TRACE_ITER_SYM_MASK); 974 unsigned long sym_flags = (trace_flags & TRACE_ITER_SYM_MASK);
970 struct fgraph_data *data = iter->private; 975 struct fgraph_data *data = iter->private;
@@ -976,16 +981,16 @@ print_graph_comment(struct trace_seq *s, struct trace_entry *ent,
976 if (data) 981 if (data)
977 depth = per_cpu_ptr(data->cpu_data, iter->cpu)->depth; 982 depth = per_cpu_ptr(data->cpu_data, iter->cpu)->depth;
978 983
979 if (print_graph_prologue(iter, s, 0, 0)) 984 if (print_graph_prologue(iter, s, 0, 0, flags))
980 return TRACE_TYPE_PARTIAL_LINE; 985 return TRACE_TYPE_PARTIAL_LINE;
981 986
982 /* No overhead */ 987 /* No overhead */
983 ret = print_graph_overhead(-1, s); 988 ret = print_graph_overhead(-1, s, flags);
984 if (!ret) 989 if (!ret)
985 return TRACE_TYPE_PARTIAL_LINE; 990 return TRACE_TYPE_PARTIAL_LINE;
986 991
987 /* No time */ 992 /* No time */
988 if (tracer_flags.val & TRACE_GRAPH_PRINT_DURATION) { 993 if (flags & TRACE_GRAPH_PRINT_DURATION) {
989 ret = trace_seq_printf(s, " | "); 994 ret = trace_seq_printf(s, " | ");
990 if (!ret) 995 if (!ret)
991 return TRACE_TYPE_PARTIAL_LINE; 996 return TRACE_TYPE_PARTIAL_LINE;
@@ -1040,7 +1045,7 @@ print_graph_comment(struct trace_seq *s, struct trace_entry *ent,
1040 1045
1041 1046
1042enum print_line_t 1047enum print_line_t
1043print_graph_function(struct trace_iterator *iter) 1048print_graph_function_flags(struct trace_iterator *iter, u32 flags)
1044{ 1049{
1045 struct ftrace_graph_ent_entry *field; 1050 struct ftrace_graph_ent_entry *field;
1046 struct fgraph_data *data = iter->private; 1051 struct fgraph_data *data = iter->private;
@@ -1061,7 +1066,7 @@ print_graph_function(struct trace_iterator *iter)
1061 if (data && data->failed) { 1066 if (data && data->failed) {
1062 field = &data->ent; 1067 field = &data->ent;
1063 iter->cpu = data->cpu; 1068 iter->cpu = data->cpu;
1064 ret = print_graph_entry(field, s, iter); 1069 ret = print_graph_entry(field, s, iter, flags);
1065 if (ret == TRACE_TYPE_HANDLED && iter->cpu != cpu) { 1070 if (ret == TRACE_TYPE_HANDLED && iter->cpu != cpu) {
1066 per_cpu_ptr(data->cpu_data, iter->cpu)->ignore = 1; 1071 per_cpu_ptr(data->cpu_data, iter->cpu)->ignore = 1;
1067 ret = TRACE_TYPE_NO_CONSUME; 1072 ret = TRACE_TYPE_NO_CONSUME;
@@ -1081,32 +1086,49 @@ print_graph_function(struct trace_iterator *iter)
1081 struct ftrace_graph_ent_entry saved; 1086 struct ftrace_graph_ent_entry saved;
1082 trace_assign_type(field, entry); 1087 trace_assign_type(field, entry);
1083 saved = *field; 1088 saved = *field;
1084 return print_graph_entry(&saved, s, iter); 1089 return print_graph_entry(&saved, s, iter, flags);
1085 } 1090 }
1086 case TRACE_GRAPH_RET: { 1091 case TRACE_GRAPH_RET: {
1087 struct ftrace_graph_ret_entry *field; 1092 struct ftrace_graph_ret_entry *field;
1088 trace_assign_type(field, entry); 1093 trace_assign_type(field, entry);
1089 return print_graph_return(&field->ret, s, entry, iter); 1094 return print_graph_return(&field->ret, s, entry, iter, flags);
1090 } 1095 }
1096 case TRACE_STACK:
1097 case TRACE_FN:
1098 /* dont trace stack and functions as comments */
1099 return TRACE_TYPE_UNHANDLED;
1100
1091 default: 1101 default:
1092 return print_graph_comment(s, entry, iter); 1102 return print_graph_comment(s, entry, iter, flags);
1093 } 1103 }
1094 1104
1095 return TRACE_TYPE_HANDLED; 1105 return TRACE_TYPE_HANDLED;
1096} 1106}
1097 1107
1098static void print_lat_header(struct seq_file *s) 1108static enum print_line_t
1109print_graph_function(struct trace_iterator *iter)
1110{
1111 return print_graph_function_flags(iter, tracer_flags.val);
1112}
1113
1114static enum print_line_t
1115print_graph_function_event(struct trace_iterator *iter, int flags)
1116{
1117 return print_graph_function(iter);
1118}
1119
1120static void print_lat_header(struct seq_file *s, u32 flags)
1099{ 1121{
1100 static const char spaces[] = " " /* 16 spaces */ 1122 static const char spaces[] = " " /* 16 spaces */
1101 " " /* 4 spaces */ 1123 " " /* 4 spaces */
1102 " "; /* 17 spaces */ 1124 " "; /* 17 spaces */
1103 int size = 0; 1125 int size = 0;
1104 1126
1105 if (tracer_flags.val & TRACE_GRAPH_PRINT_ABS_TIME) 1127 if (flags & TRACE_GRAPH_PRINT_ABS_TIME)
1106 size += 16; 1128 size += 16;
1107 if (tracer_flags.val & TRACE_GRAPH_PRINT_CPU) 1129 if (flags & TRACE_GRAPH_PRINT_CPU)
1108 size += 4; 1130 size += 4;
1109 if (tracer_flags.val & TRACE_GRAPH_PRINT_PROC) 1131 if (flags & TRACE_GRAPH_PRINT_PROC)
1110 size += 17; 1132 size += 17;
1111 1133
1112 seq_printf(s, "#%.*s _-----=> irqs-off \n", size, spaces); 1134 seq_printf(s, "#%.*s _-----=> irqs-off \n", size, spaces);
@@ -1117,43 +1139,48 @@ static void print_lat_header(struct seq_file *s)
1117 seq_printf(s, "#%.*s|||| / \n", size, spaces); 1139 seq_printf(s, "#%.*s|||| / \n", size, spaces);
1118} 1140}
1119 1141
1120static void print_graph_headers(struct seq_file *s) 1142void print_graph_headers_flags(struct seq_file *s, u32 flags)
1121{ 1143{
1122 int lat = trace_flags & TRACE_ITER_LATENCY_FMT; 1144 int lat = trace_flags & TRACE_ITER_LATENCY_FMT;
1123 1145
1124 if (lat) 1146 if (lat)
1125 print_lat_header(s); 1147 print_lat_header(s, flags);
1126 1148
1127 /* 1st line */ 1149 /* 1st line */
1128 seq_printf(s, "#"); 1150 seq_printf(s, "#");
1129 if (tracer_flags.val & TRACE_GRAPH_PRINT_ABS_TIME) 1151 if (flags & TRACE_GRAPH_PRINT_ABS_TIME)
1130 seq_printf(s, " TIME "); 1152 seq_printf(s, " TIME ");
1131 if (tracer_flags.val & TRACE_GRAPH_PRINT_CPU) 1153 if (flags & TRACE_GRAPH_PRINT_CPU)
1132 seq_printf(s, " CPU"); 1154 seq_printf(s, " CPU");
1133 if (tracer_flags.val & TRACE_GRAPH_PRINT_PROC) 1155 if (flags & TRACE_GRAPH_PRINT_PROC)
1134 seq_printf(s, " TASK/PID "); 1156 seq_printf(s, " TASK/PID ");
1135 if (lat) 1157 if (lat)
1136 seq_printf(s, "|||||"); 1158 seq_printf(s, "|||||");
1137 if (tracer_flags.val & TRACE_GRAPH_PRINT_DURATION) 1159 if (flags & TRACE_GRAPH_PRINT_DURATION)
1138 seq_printf(s, " DURATION "); 1160 seq_printf(s, " DURATION ");
1139 seq_printf(s, " FUNCTION CALLS\n"); 1161 seq_printf(s, " FUNCTION CALLS\n");
1140 1162
1141 /* 2nd line */ 1163 /* 2nd line */
1142 seq_printf(s, "#"); 1164 seq_printf(s, "#");
1143 if (tracer_flags.val & TRACE_GRAPH_PRINT_ABS_TIME) 1165 if (flags & TRACE_GRAPH_PRINT_ABS_TIME)
1144 seq_printf(s, " | "); 1166 seq_printf(s, " | ");
1145 if (tracer_flags.val & TRACE_GRAPH_PRINT_CPU) 1167 if (flags & TRACE_GRAPH_PRINT_CPU)
1146 seq_printf(s, " | "); 1168 seq_printf(s, " | ");
1147 if (tracer_flags.val & TRACE_GRAPH_PRINT_PROC) 1169 if (flags & TRACE_GRAPH_PRINT_PROC)
1148 seq_printf(s, " | | "); 1170 seq_printf(s, " | | ");
1149 if (lat) 1171 if (lat)
1150 seq_printf(s, "|||||"); 1172 seq_printf(s, "|||||");
1151 if (tracer_flags.val & TRACE_GRAPH_PRINT_DURATION) 1173 if (flags & TRACE_GRAPH_PRINT_DURATION)
1152 seq_printf(s, " | | "); 1174 seq_printf(s, " | | ");
1153 seq_printf(s, " | | | |\n"); 1175 seq_printf(s, " | | | |\n");
1154} 1176}
1155 1177
1156static void graph_trace_open(struct trace_iterator *iter) 1178void print_graph_headers(struct seq_file *s)
1179{
1180 print_graph_headers_flags(s, tracer_flags.val);
1181}
1182
1183void graph_trace_open(struct trace_iterator *iter)
1157{ 1184{
1158 /* pid and depth on the last trace processed */ 1185 /* pid and depth on the last trace processed */
1159 struct fgraph_data *data; 1186 struct fgraph_data *data;
@@ -1188,7 +1215,7 @@ static void graph_trace_open(struct trace_iterator *iter)
1188 pr_warning("function graph tracer: not enough memory\n"); 1215 pr_warning("function graph tracer: not enough memory\n");
1189} 1216}
1190 1217
1191static void graph_trace_close(struct trace_iterator *iter) 1218void graph_trace_close(struct trace_iterator *iter)
1192{ 1219{
1193 struct fgraph_data *data = iter->private; 1220 struct fgraph_data *data = iter->private;
1194 1221
@@ -1198,6 +1225,16 @@ static void graph_trace_close(struct trace_iterator *iter)
1198 } 1225 }
1199} 1226}
1200 1227
1228static struct trace_event graph_trace_entry_event = {
1229 .type = TRACE_GRAPH_ENT,
1230 .trace = print_graph_function_event,
1231};
1232
1233static struct trace_event graph_trace_ret_event = {
1234 .type = TRACE_GRAPH_RET,
1235 .trace = print_graph_function_event,
1236};
1237
1201static struct tracer graph_trace __read_mostly = { 1238static struct tracer graph_trace __read_mostly = {
1202 .name = "function_graph", 1239 .name = "function_graph",
1203 .open = graph_trace_open, 1240 .open = graph_trace_open,
@@ -1219,6 +1256,16 @@ static __init int init_graph_trace(void)
1219{ 1256{
1220 max_bytes_for_cpu = snprintf(NULL, 0, "%d", nr_cpu_ids - 1); 1257 max_bytes_for_cpu = snprintf(NULL, 0, "%d", nr_cpu_ids - 1);
1221 1258
1259 if (!register_ftrace_event(&graph_trace_entry_event)) {
1260 pr_warning("Warning: could not register graph trace events\n");
1261 return 1;
1262 }
1263
1264 if (!register_ftrace_event(&graph_trace_ret_event)) {
1265 pr_warning("Warning: could not register graph trace events\n");
1266 return 1;
1267 }
1268
1222 return register_tracer(&graph_trace); 1269 return register_tracer(&graph_trace);
1223} 1270}
1224 1271
diff --git a/kernel/trace/trace_hw_branches.c b/kernel/trace/trace_hw_branches.c
deleted file mode 100644
index 7b97000745f5..000000000000
--- a/kernel/trace/trace_hw_branches.c
+++ /dev/null
@@ -1,312 +0,0 @@
1/*
2 * h/w branch tracer for x86 based on BTS
3 *
4 * Copyright (C) 2008-2009 Intel Corporation.
5 * Markus Metzger <markus.t.metzger@gmail.com>, 2008-2009
6 */
7#include <linux/kallsyms.h>
8#include <linux/debugfs.h>
9#include <linux/ftrace.h>
10#include <linux/module.h>
11#include <linux/cpu.h>
12#include <linux/smp.h>
13#include <linux/fs.h>
14
15#include <asm/ds.h>
16
17#include "trace_output.h"
18#include "trace.h"
19
20
21#define BTS_BUFFER_SIZE (1 << 13)
22
23static DEFINE_PER_CPU(struct bts_tracer *, hwb_tracer);
24static DEFINE_PER_CPU(unsigned char[BTS_BUFFER_SIZE], hwb_buffer);
25
26#define this_tracer per_cpu(hwb_tracer, smp_processor_id())
27
28static int trace_hw_branches_enabled __read_mostly;
29static int trace_hw_branches_suspended __read_mostly;
30static struct trace_array *hw_branch_trace __read_mostly;
31
32
33static void bts_trace_init_cpu(int cpu)
34{
35 per_cpu(hwb_tracer, cpu) =
36 ds_request_bts_cpu(cpu, per_cpu(hwb_buffer, cpu),
37 BTS_BUFFER_SIZE, NULL, (size_t)-1,
38 BTS_KERNEL);
39
40 if (IS_ERR(per_cpu(hwb_tracer, cpu)))
41 per_cpu(hwb_tracer, cpu) = NULL;
42}
43
44static int bts_trace_init(struct trace_array *tr)
45{
46 int cpu;
47
48 hw_branch_trace = tr;
49 trace_hw_branches_enabled = 0;
50
51 get_online_cpus();
52 for_each_online_cpu(cpu) {
53 bts_trace_init_cpu(cpu);
54
55 if (likely(per_cpu(hwb_tracer, cpu)))
56 trace_hw_branches_enabled = 1;
57 }
58 trace_hw_branches_suspended = 0;
59 put_online_cpus();
60
61 /* If we could not enable tracing on a single cpu, we fail. */
62 return trace_hw_branches_enabled ? 0 : -EOPNOTSUPP;
63}
64
65static void bts_trace_reset(struct trace_array *tr)
66{
67 int cpu;
68
69 get_online_cpus();
70 for_each_online_cpu(cpu) {
71 if (likely(per_cpu(hwb_tracer, cpu))) {
72 ds_release_bts(per_cpu(hwb_tracer, cpu));
73 per_cpu(hwb_tracer, cpu) = NULL;
74 }
75 }
76 trace_hw_branches_enabled = 0;
77 trace_hw_branches_suspended = 0;
78 put_online_cpus();
79}
80
81static void bts_trace_start(struct trace_array *tr)
82{
83 int cpu;
84
85 get_online_cpus();
86 for_each_online_cpu(cpu)
87 if (likely(per_cpu(hwb_tracer, cpu)))
88 ds_resume_bts(per_cpu(hwb_tracer, cpu));
89 trace_hw_branches_suspended = 0;
90 put_online_cpus();
91}
92
93static void bts_trace_stop(struct trace_array *tr)
94{
95 int cpu;
96
97 get_online_cpus();
98 for_each_online_cpu(cpu)
99 if (likely(per_cpu(hwb_tracer, cpu)))
100 ds_suspend_bts(per_cpu(hwb_tracer, cpu));
101 trace_hw_branches_suspended = 1;
102 put_online_cpus();
103}
104
105static int __cpuinit bts_hotcpu_handler(struct notifier_block *nfb,
106 unsigned long action, void *hcpu)
107{
108 int cpu = (long)hcpu;
109
110 switch (action) {
111 case CPU_ONLINE:
112 case CPU_DOWN_FAILED:
113 /* The notification is sent with interrupts enabled. */
114 if (trace_hw_branches_enabled) {
115 bts_trace_init_cpu(cpu);
116
117 if (trace_hw_branches_suspended &&
118 likely(per_cpu(hwb_tracer, cpu)))
119 ds_suspend_bts(per_cpu(hwb_tracer, cpu));
120 }
121 break;
122
123 case CPU_DOWN_PREPARE:
124 /* The notification is sent with interrupts enabled. */
125 if (likely(per_cpu(hwb_tracer, cpu))) {
126 ds_release_bts(per_cpu(hwb_tracer, cpu));
127 per_cpu(hwb_tracer, cpu) = NULL;
128 }
129 }
130
131 return NOTIFY_DONE;
132}
133
134static struct notifier_block bts_hotcpu_notifier __cpuinitdata = {
135 .notifier_call = bts_hotcpu_handler
136};
137
138static void bts_trace_print_header(struct seq_file *m)
139{
140 seq_puts(m, "# CPU# TO <- FROM\n");
141}
142
143static enum print_line_t bts_trace_print_line(struct trace_iterator *iter)
144{
145 unsigned long symflags = TRACE_ITER_SYM_OFFSET;
146 struct trace_entry *entry = iter->ent;
147 struct trace_seq *seq = &iter->seq;
148 struct hw_branch_entry *it;
149
150 trace_assign_type(it, entry);
151
152 if (entry->type == TRACE_HW_BRANCHES) {
153 if (trace_seq_printf(seq, "%4d ", iter->cpu) &&
154 seq_print_ip_sym(seq, it->to, symflags) &&
155 trace_seq_printf(seq, "\t <- ") &&
156 seq_print_ip_sym(seq, it->from, symflags) &&
157 trace_seq_printf(seq, "\n"))
158 return TRACE_TYPE_HANDLED;
159 return TRACE_TYPE_PARTIAL_LINE;
160 }
161 return TRACE_TYPE_UNHANDLED;
162}
163
164void trace_hw_branch(u64 from, u64 to)
165{
166 struct ftrace_event_call *call = &event_hw_branch;
167 struct trace_array *tr = hw_branch_trace;
168 struct ring_buffer_event *event;
169 struct ring_buffer *buf;
170 struct hw_branch_entry *entry;
171 unsigned long irq1;
172 int cpu;
173
174 if (unlikely(!tr))
175 return;
176
177 if (unlikely(!trace_hw_branches_enabled))
178 return;
179
180 local_irq_save(irq1);
181 cpu = raw_smp_processor_id();
182 if (atomic_inc_return(&tr->data[cpu]->disabled) != 1)
183 goto out;
184
185 buf = tr->buffer;
186 event = trace_buffer_lock_reserve(buf, TRACE_HW_BRANCHES,
187 sizeof(*entry), 0, 0);
188 if (!event)
189 goto out;
190 entry = ring_buffer_event_data(event);
191 tracing_generic_entry_update(&entry->ent, 0, from);
192 entry->ent.type = TRACE_HW_BRANCHES;
193 entry->from = from;
194 entry->to = to;
195 if (!filter_check_discard(call, entry, buf, event))
196 trace_buffer_unlock_commit(buf, event, 0, 0);
197
198 out:
199 atomic_dec(&tr->data[cpu]->disabled);
200 local_irq_restore(irq1);
201}
202
203static void trace_bts_at(const struct bts_trace *trace, void *at)
204{
205 struct bts_struct bts;
206 int err = 0;
207
208 WARN_ON_ONCE(!trace->read);
209 if (!trace->read)
210 return;
211
212 err = trace->read(this_tracer, at, &bts);
213 if (err < 0)
214 return;
215
216 switch (bts.qualifier) {
217 case BTS_BRANCH:
218 trace_hw_branch(bts.variant.lbr.from, bts.variant.lbr.to);
219 break;
220 }
221}
222
223/*
224 * Collect the trace on the current cpu and write it into the ftrace buffer.
225 *
226 * pre: tracing must be suspended on the current cpu
227 */
228static void trace_bts_cpu(void *arg)
229{
230 struct trace_array *tr = (struct trace_array *)arg;
231 const struct bts_trace *trace;
232 unsigned char *at;
233
234 if (unlikely(!tr))
235 return;
236
237 if (unlikely(atomic_read(&tr->data[raw_smp_processor_id()]->disabled)))
238 return;
239
240 if (unlikely(!this_tracer))
241 return;
242
243 trace = ds_read_bts(this_tracer);
244 if (!trace)
245 return;
246
247 for (at = trace->ds.top; (void *)at < trace->ds.end;
248 at += trace->ds.size)
249 trace_bts_at(trace, at);
250
251 for (at = trace->ds.begin; (void *)at < trace->ds.top;
252 at += trace->ds.size)
253 trace_bts_at(trace, at);
254}
255
256static void trace_bts_prepare(struct trace_iterator *iter)
257{
258 int cpu;
259
260 get_online_cpus();
261 for_each_online_cpu(cpu)
262 if (likely(per_cpu(hwb_tracer, cpu)))
263 ds_suspend_bts(per_cpu(hwb_tracer, cpu));
264 /*
265 * We need to collect the trace on the respective cpu since ftrace
266 * implicitly adds the record for the current cpu.
267 * Once that is more flexible, we could collect the data from any cpu.
268 */
269 on_each_cpu(trace_bts_cpu, iter->tr, 1);
270
271 for_each_online_cpu(cpu)
272 if (likely(per_cpu(hwb_tracer, cpu)))
273 ds_resume_bts(per_cpu(hwb_tracer, cpu));
274 put_online_cpus();
275}
276
277static void trace_bts_close(struct trace_iterator *iter)
278{
279 tracing_reset_online_cpus(iter->tr);
280}
281
282void trace_hw_branch_oops(void)
283{
284 if (this_tracer) {
285 ds_suspend_bts_noirq(this_tracer);
286 trace_bts_cpu(hw_branch_trace);
287 ds_resume_bts_noirq(this_tracer);
288 }
289}
290
291struct tracer bts_tracer __read_mostly =
292{
293 .name = "hw-branch-tracer",
294 .init = bts_trace_init,
295 .reset = bts_trace_reset,
296 .print_header = bts_trace_print_header,
297 .print_line = bts_trace_print_line,
298 .start = bts_trace_start,
299 .stop = bts_trace_stop,
300 .open = trace_bts_prepare,
301 .close = trace_bts_close,
302#ifdef CONFIG_FTRACE_SELFTEST
303 .selftest = trace_selftest_startup_hw_branches,
304#endif /* CONFIG_FTRACE_SELFTEST */
305};
306
307__init static int init_bts_trace(void)
308{
309 register_hotcpu_notifier(&bts_hotcpu_notifier);
310 return register_tracer(&bts_tracer);
311}
312device_initcall(init_bts_trace);
diff --git a/kernel/trace/trace_irqsoff.c b/kernel/trace/trace_irqsoff.c
index 2974bc7538c7..6fd486e0cef4 100644
--- a/kernel/trace/trace_irqsoff.c
+++ b/kernel/trace/trace_irqsoff.c
@@ -34,6 +34,9 @@ static int trace_type __read_mostly;
34 34
35static int save_lat_flag; 35static int save_lat_flag;
36 36
37static void stop_irqsoff_tracer(struct trace_array *tr, int graph);
38static int start_irqsoff_tracer(struct trace_array *tr, int graph);
39
37#ifdef CONFIG_PREEMPT_TRACER 40#ifdef CONFIG_PREEMPT_TRACER
38static inline int 41static inline int
39preempt_trace(void) 42preempt_trace(void)
@@ -55,6 +58,23 @@ irq_trace(void)
55# define irq_trace() (0) 58# define irq_trace() (0)
56#endif 59#endif
57 60
61#define TRACE_DISPLAY_GRAPH 1
62
63static struct tracer_opt trace_opts[] = {
64#ifdef CONFIG_FUNCTION_GRAPH_TRACER
65 /* display latency trace as call graph */
66 { TRACER_OPT(display-graph, TRACE_DISPLAY_GRAPH) },
67#endif
68 { } /* Empty entry */
69};
70
71static struct tracer_flags tracer_flags = {
72 .val = 0,
73 .opts = trace_opts,
74};
75
76#define is_graph() (tracer_flags.val & TRACE_DISPLAY_GRAPH)
77
58/* 78/*
59 * Sequence count - we record it when starting a measurement and 79 * Sequence count - we record it when starting a measurement and
60 * skip the latency if the sequence has changed - some other section 80 * skip the latency if the sequence has changed - some other section
@@ -108,6 +128,202 @@ static struct ftrace_ops trace_ops __read_mostly =
108}; 128};
109#endif /* CONFIG_FUNCTION_TRACER */ 129#endif /* CONFIG_FUNCTION_TRACER */
110 130
131#ifdef CONFIG_FUNCTION_GRAPH_TRACER
132static int irqsoff_set_flag(u32 old_flags, u32 bit, int set)
133{
134 int cpu;
135
136 if (!(bit & TRACE_DISPLAY_GRAPH))
137 return -EINVAL;
138
139 if (!(is_graph() ^ set))
140 return 0;
141
142 stop_irqsoff_tracer(irqsoff_trace, !set);
143
144 for_each_possible_cpu(cpu)
145 per_cpu(tracing_cpu, cpu) = 0;
146
147 tracing_max_latency = 0;
148 tracing_reset_online_cpus(irqsoff_trace);
149
150 return start_irqsoff_tracer(irqsoff_trace, set);
151}
152
153static int irqsoff_graph_entry(struct ftrace_graph_ent *trace)
154{
155 struct trace_array *tr = irqsoff_trace;
156 struct trace_array_cpu *data;
157 unsigned long flags;
158 long disabled;
159 int ret;
160 int cpu;
161 int pc;
162
163 cpu = raw_smp_processor_id();
164 if (likely(!per_cpu(tracing_cpu, cpu)))
165 return 0;
166
167 local_save_flags(flags);
168 /* slight chance to get a false positive on tracing_cpu */
169 if (!irqs_disabled_flags(flags))
170 return 0;
171
172 data = tr->data[cpu];
173 disabled = atomic_inc_return(&data->disabled);
174
175 if (likely(disabled == 1)) {
176 pc = preempt_count();
177 ret = __trace_graph_entry(tr, trace, flags, pc);
178 } else
179 ret = 0;
180
181 atomic_dec(&data->disabled);
182 return ret;
183}
184
185static void irqsoff_graph_return(struct ftrace_graph_ret *trace)
186{
187 struct trace_array *tr = irqsoff_trace;
188 struct trace_array_cpu *data;
189 unsigned long flags;
190 long disabled;
191 int cpu;
192 int pc;
193
194 cpu = raw_smp_processor_id();
195 if (likely(!per_cpu(tracing_cpu, cpu)))
196 return;
197
198 local_save_flags(flags);
199 /* slight chance to get a false positive on tracing_cpu */
200 if (!irqs_disabled_flags(flags))
201 return;
202
203 data = tr->data[cpu];
204 disabled = atomic_inc_return(&data->disabled);
205
206 if (likely(disabled == 1)) {
207 pc = preempt_count();
208 __trace_graph_return(tr, trace, flags, pc);
209 }
210
211 atomic_dec(&data->disabled);
212}
213
214static void irqsoff_trace_open(struct trace_iterator *iter)
215{
216 if (is_graph())
217 graph_trace_open(iter);
218
219}
220
221static void irqsoff_trace_close(struct trace_iterator *iter)
222{
223 if (iter->private)
224 graph_trace_close(iter);
225}
226
227#define GRAPH_TRACER_FLAGS (TRACE_GRAPH_PRINT_CPU | \
228 TRACE_GRAPH_PRINT_PROC)
229
230static enum print_line_t irqsoff_print_line(struct trace_iterator *iter)
231{
232 u32 flags = GRAPH_TRACER_FLAGS;
233
234 if (trace_flags & TRACE_ITER_LATENCY_FMT)
235 flags |= TRACE_GRAPH_PRINT_DURATION;
236 else
237 flags |= TRACE_GRAPH_PRINT_ABS_TIME;
238
239 /*
240 * In graph mode call the graph tracer output function,
241 * otherwise go with the TRACE_FN event handler
242 */
243 if (is_graph())
244 return print_graph_function_flags(iter, flags);
245
246 return TRACE_TYPE_UNHANDLED;
247}
248
249static void irqsoff_print_header(struct seq_file *s)
250{
251 if (is_graph()) {
252 struct trace_iterator *iter = s->private;
253 u32 flags = GRAPH_TRACER_FLAGS;
254
255 if (trace_flags & TRACE_ITER_LATENCY_FMT) {
256 /* print nothing if the buffers are empty */
257 if (trace_empty(iter))
258 return;
259
260 print_trace_header(s, iter);
261 flags |= TRACE_GRAPH_PRINT_DURATION;
262 } else
263 flags |= TRACE_GRAPH_PRINT_ABS_TIME;
264
265 print_graph_headers_flags(s, flags);
266 } else
267 trace_default_header(s);
268}
269
270static void
271trace_graph_function(struct trace_array *tr,
272 unsigned long ip, unsigned long flags, int pc)
273{
274 u64 time = trace_clock_local();
275 struct ftrace_graph_ent ent = {
276 .func = ip,
277 .depth = 0,
278 };
279 struct ftrace_graph_ret ret = {
280 .func = ip,
281 .depth = 0,
282 .calltime = time,
283 .rettime = time,
284 };
285
286 __trace_graph_entry(tr, &ent, flags, pc);
287 __trace_graph_return(tr, &ret, flags, pc);
288}
289
290static void
291__trace_function(struct trace_array *tr,
292 unsigned long ip, unsigned long parent_ip,
293 unsigned long flags, int pc)
294{
295 if (!is_graph())
296 trace_function(tr, ip, parent_ip, flags, pc);
297 else {
298 trace_graph_function(tr, parent_ip, flags, pc);
299 trace_graph_function(tr, ip, flags, pc);
300 }
301}
302
303#else
304#define __trace_function trace_function
305
306static int irqsoff_set_flag(u32 old_flags, u32 bit, int set)
307{
308 return -EINVAL;
309}
310
311static int irqsoff_graph_entry(struct ftrace_graph_ent *trace)
312{
313 return -1;
314}
315
316static enum print_line_t irqsoff_print_line(struct trace_iterator *iter)
317{
318 return TRACE_TYPE_UNHANDLED;
319}
320
321static void irqsoff_graph_return(struct ftrace_graph_ret *trace) { }
322static void irqsoff_print_header(struct seq_file *s) { }
323static void irqsoff_trace_open(struct trace_iterator *iter) { }
324static void irqsoff_trace_close(struct trace_iterator *iter) { }
325#endif /* CONFIG_FUNCTION_GRAPH_TRACER */
326
111/* 327/*
112 * Should this new latency be reported/recorded? 328 * Should this new latency be reported/recorded?
113 */ 329 */
@@ -150,7 +366,7 @@ check_critical_timing(struct trace_array *tr,
150 if (!report_latency(delta)) 366 if (!report_latency(delta))
151 goto out_unlock; 367 goto out_unlock;
152 368
153 trace_function(tr, CALLER_ADDR0, parent_ip, flags, pc); 369 __trace_function(tr, CALLER_ADDR0, parent_ip, flags, pc);
154 /* Skip 5 functions to get to the irq/preempt enable function */ 370 /* Skip 5 functions to get to the irq/preempt enable function */
155 __trace_stack(tr, flags, 5, pc); 371 __trace_stack(tr, flags, 5, pc);
156 372
@@ -172,7 +388,7 @@ out_unlock:
172out: 388out:
173 data->critical_sequence = max_sequence; 389 data->critical_sequence = max_sequence;
174 data->preempt_timestamp = ftrace_now(cpu); 390 data->preempt_timestamp = ftrace_now(cpu);
175 trace_function(tr, CALLER_ADDR0, parent_ip, flags, pc); 391 __trace_function(tr, CALLER_ADDR0, parent_ip, flags, pc);
176} 392}
177 393
178static inline void 394static inline void
@@ -204,7 +420,7 @@ start_critical_timing(unsigned long ip, unsigned long parent_ip)
204 420
205 local_save_flags(flags); 421 local_save_flags(flags);
206 422
207 trace_function(tr, ip, parent_ip, flags, preempt_count()); 423 __trace_function(tr, ip, parent_ip, flags, preempt_count());
208 424
209 per_cpu(tracing_cpu, cpu) = 1; 425 per_cpu(tracing_cpu, cpu) = 1;
210 426
@@ -238,7 +454,7 @@ stop_critical_timing(unsigned long ip, unsigned long parent_ip)
238 atomic_inc(&data->disabled); 454 atomic_inc(&data->disabled);
239 455
240 local_save_flags(flags); 456 local_save_flags(flags);
241 trace_function(tr, ip, parent_ip, flags, preempt_count()); 457 __trace_function(tr, ip, parent_ip, flags, preempt_count());
242 check_critical_timing(tr, data, parent_ip ? : ip, cpu); 458 check_critical_timing(tr, data, parent_ip ? : ip, cpu);
243 data->critical_start = 0; 459 data->critical_start = 0;
244 atomic_dec(&data->disabled); 460 atomic_dec(&data->disabled);
@@ -347,19 +563,32 @@ void trace_preempt_off(unsigned long a0, unsigned long a1)
347} 563}
348#endif /* CONFIG_PREEMPT_TRACER */ 564#endif /* CONFIG_PREEMPT_TRACER */
349 565
350static void start_irqsoff_tracer(struct trace_array *tr) 566static int start_irqsoff_tracer(struct trace_array *tr, int graph)
351{ 567{
352 register_ftrace_function(&trace_ops); 568 int ret = 0;
353 if (tracing_is_enabled()) 569
570 if (!graph)
571 ret = register_ftrace_function(&trace_ops);
572 else
573 ret = register_ftrace_graph(&irqsoff_graph_return,
574 &irqsoff_graph_entry);
575
576 if (!ret && tracing_is_enabled())
354 tracer_enabled = 1; 577 tracer_enabled = 1;
355 else 578 else
356 tracer_enabled = 0; 579 tracer_enabled = 0;
580
581 return ret;
357} 582}
358 583
359static void stop_irqsoff_tracer(struct trace_array *tr) 584static void stop_irqsoff_tracer(struct trace_array *tr, int graph)
360{ 585{
361 tracer_enabled = 0; 586 tracer_enabled = 0;
362 unregister_ftrace_function(&trace_ops); 587
588 if (!graph)
589 unregister_ftrace_function(&trace_ops);
590 else
591 unregister_ftrace_graph();
363} 592}
364 593
365static void __irqsoff_tracer_init(struct trace_array *tr) 594static void __irqsoff_tracer_init(struct trace_array *tr)
@@ -372,12 +601,14 @@ static void __irqsoff_tracer_init(struct trace_array *tr)
372 /* make sure that the tracer is visible */ 601 /* make sure that the tracer is visible */
373 smp_wmb(); 602 smp_wmb();
374 tracing_reset_online_cpus(tr); 603 tracing_reset_online_cpus(tr);
375 start_irqsoff_tracer(tr); 604
605 if (start_irqsoff_tracer(tr, is_graph()))
606 printk(KERN_ERR "failed to start irqsoff tracer\n");
376} 607}
377 608
378static void irqsoff_tracer_reset(struct trace_array *tr) 609static void irqsoff_tracer_reset(struct trace_array *tr)
379{ 610{
380 stop_irqsoff_tracer(tr); 611 stop_irqsoff_tracer(tr, is_graph());
381 612
382 if (!save_lat_flag) 613 if (!save_lat_flag)
383 trace_flags &= ~TRACE_ITER_LATENCY_FMT; 614 trace_flags &= ~TRACE_ITER_LATENCY_FMT;
@@ -409,9 +640,15 @@ static struct tracer irqsoff_tracer __read_mostly =
409 .start = irqsoff_tracer_start, 640 .start = irqsoff_tracer_start,
410 .stop = irqsoff_tracer_stop, 641 .stop = irqsoff_tracer_stop,
411 .print_max = 1, 642 .print_max = 1,
643 .print_header = irqsoff_print_header,
644 .print_line = irqsoff_print_line,
645 .flags = &tracer_flags,
646 .set_flag = irqsoff_set_flag,
412#ifdef CONFIG_FTRACE_SELFTEST 647#ifdef CONFIG_FTRACE_SELFTEST
413 .selftest = trace_selftest_startup_irqsoff, 648 .selftest = trace_selftest_startup_irqsoff,
414#endif 649#endif
650 .open = irqsoff_trace_open,
651 .close = irqsoff_trace_close,
415}; 652};
416# define register_irqsoff(trace) register_tracer(&trace) 653# define register_irqsoff(trace) register_tracer(&trace)
417#else 654#else
@@ -435,9 +672,15 @@ static struct tracer preemptoff_tracer __read_mostly =
435 .start = irqsoff_tracer_start, 672 .start = irqsoff_tracer_start,
436 .stop = irqsoff_tracer_stop, 673 .stop = irqsoff_tracer_stop,
437 .print_max = 1, 674 .print_max = 1,
675 .print_header = irqsoff_print_header,
676 .print_line = irqsoff_print_line,
677 .flags = &tracer_flags,
678 .set_flag = irqsoff_set_flag,
438#ifdef CONFIG_FTRACE_SELFTEST 679#ifdef CONFIG_FTRACE_SELFTEST
439 .selftest = trace_selftest_startup_preemptoff, 680 .selftest = trace_selftest_startup_preemptoff,
440#endif 681#endif
682 .open = irqsoff_trace_open,
683 .close = irqsoff_trace_close,
441}; 684};
442# define register_preemptoff(trace) register_tracer(&trace) 685# define register_preemptoff(trace) register_tracer(&trace)
443#else 686#else
@@ -463,9 +706,15 @@ static struct tracer preemptirqsoff_tracer __read_mostly =
463 .start = irqsoff_tracer_start, 706 .start = irqsoff_tracer_start,
464 .stop = irqsoff_tracer_stop, 707 .stop = irqsoff_tracer_stop,
465 .print_max = 1, 708 .print_max = 1,
709 .print_header = irqsoff_print_header,
710 .print_line = irqsoff_print_line,
711 .flags = &tracer_flags,
712 .set_flag = irqsoff_set_flag,
466#ifdef CONFIG_FTRACE_SELFTEST 713#ifdef CONFIG_FTRACE_SELFTEST
467 .selftest = trace_selftest_startup_preemptirqsoff, 714 .selftest = trace_selftest_startup_preemptirqsoff,
468#endif 715#endif
716 .open = irqsoff_trace_open,
717 .close = irqsoff_trace_close,
469}; 718};
470 719
471# define register_preemptirqsoff(trace) register_tracer(&trace) 720# define register_preemptirqsoff(trace) register_tracer(&trace)
diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index 1251e367bae9..a7514326052b 100644
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -29,6 +29,8 @@
29#include <linux/ctype.h> 29#include <linux/ctype.h>
30#include <linux/ptrace.h> 30#include <linux/ptrace.h>
31#include <linux/perf_event.h> 31#include <linux/perf_event.h>
32#include <linux/stringify.h>
33#include <asm/bitsperlong.h>
32 34
33#include "trace.h" 35#include "trace.h"
34#include "trace_output.h" 36#include "trace_output.h"
@@ -40,7 +42,6 @@
40 42
41/* Reserved field names */ 43/* Reserved field names */
42#define FIELD_STRING_IP "__probe_ip" 44#define FIELD_STRING_IP "__probe_ip"
43#define FIELD_STRING_NARGS "__probe_nargs"
44#define FIELD_STRING_RETIP "__probe_ret_ip" 45#define FIELD_STRING_RETIP "__probe_ret_ip"
45#define FIELD_STRING_FUNC "__probe_func" 46#define FIELD_STRING_FUNC "__probe_func"
46 47
@@ -52,56 +53,102 @@ const char *reserved_field_names[] = {
52 "common_tgid", 53 "common_tgid",
53 "common_lock_depth", 54 "common_lock_depth",
54 FIELD_STRING_IP, 55 FIELD_STRING_IP,
55 FIELD_STRING_NARGS,
56 FIELD_STRING_RETIP, 56 FIELD_STRING_RETIP,
57 FIELD_STRING_FUNC, 57 FIELD_STRING_FUNC,
58}; 58};
59 59
60struct fetch_func { 60/* Printing function type */
61 unsigned long (*func)(struct pt_regs *, void *); 61typedef int (*print_type_func_t)(struct trace_seq *, const char *, void *);
62#define PRINT_TYPE_FUNC_NAME(type) print_type_##type
63#define PRINT_TYPE_FMT_NAME(type) print_type_format_##type
64
65/* Printing in basic type function template */
66#define DEFINE_BASIC_PRINT_TYPE_FUNC(type, fmt, cast) \
67static __kprobes int PRINT_TYPE_FUNC_NAME(type)(struct trace_seq *s, \
68 const char *name, void *data)\
69{ \
70 return trace_seq_printf(s, " %s=" fmt, name, (cast)*(type *)data);\
71} \
72static const char PRINT_TYPE_FMT_NAME(type)[] = fmt;
73
74DEFINE_BASIC_PRINT_TYPE_FUNC(u8, "%x", unsigned int)
75DEFINE_BASIC_PRINT_TYPE_FUNC(u16, "%x", unsigned int)
76DEFINE_BASIC_PRINT_TYPE_FUNC(u32, "%lx", unsigned long)
77DEFINE_BASIC_PRINT_TYPE_FUNC(u64, "%llx", unsigned long long)
78DEFINE_BASIC_PRINT_TYPE_FUNC(s8, "%d", int)
79DEFINE_BASIC_PRINT_TYPE_FUNC(s16, "%d", int)
80DEFINE_BASIC_PRINT_TYPE_FUNC(s32, "%ld", long)
81DEFINE_BASIC_PRINT_TYPE_FUNC(s64, "%lld", long long)
82
83/* Data fetch function type */
84typedef void (*fetch_func_t)(struct pt_regs *, void *, void *);
85
86struct fetch_param {
87 fetch_func_t fn;
62 void *data; 88 void *data;
63}; 89};
64 90
65static __kprobes unsigned long call_fetch(struct fetch_func *f, 91static __kprobes void call_fetch(struct fetch_param *fprm,
66 struct pt_regs *regs) 92 struct pt_regs *regs, void *dest)
67{ 93{
68 return f->func(regs, f->data); 94 return fprm->fn(regs, fprm->data, dest);
69} 95}
70 96
71/* fetch handlers */ 97#define FETCH_FUNC_NAME(kind, type) fetch_##kind##_##type
72static __kprobes unsigned long fetch_register(struct pt_regs *regs, 98/*
73 void *offset) 99 * Define macro for basic types - we don't need to define s* types, because
74{ 100 * we have to care only about bitwidth at recording time.
75 return regs_get_register(regs, (unsigned int)((unsigned long)offset)); 101 */
102#define DEFINE_BASIC_FETCH_FUNCS(kind) \
103DEFINE_FETCH_##kind(u8) \
104DEFINE_FETCH_##kind(u16) \
105DEFINE_FETCH_##kind(u32) \
106DEFINE_FETCH_##kind(u64)
107
108#define CHECK_BASIC_FETCH_FUNCS(kind, fn) \
109 ((FETCH_FUNC_NAME(kind, u8) == fn) || \
110 (FETCH_FUNC_NAME(kind, u16) == fn) || \
111 (FETCH_FUNC_NAME(kind, u32) == fn) || \
112 (FETCH_FUNC_NAME(kind, u64) == fn))
113
114/* Data fetch function templates */
115#define DEFINE_FETCH_reg(type) \
116static __kprobes void FETCH_FUNC_NAME(reg, type)(struct pt_regs *regs, \
117 void *offset, void *dest) \
118{ \
119 *(type *)dest = (type)regs_get_register(regs, \
120 (unsigned int)((unsigned long)offset)); \
76} 121}
77 122DEFINE_BASIC_FETCH_FUNCS(reg)
78static __kprobes unsigned long fetch_stack(struct pt_regs *regs, 123
79 void *num) 124#define DEFINE_FETCH_stack(type) \
80{ 125static __kprobes void FETCH_FUNC_NAME(stack, type)(struct pt_regs *regs,\
81 return regs_get_kernel_stack_nth(regs, 126 void *offset, void *dest) \
82 (unsigned int)((unsigned long)num)); 127{ \
128 *(type *)dest = (type)regs_get_kernel_stack_nth(regs, \
129 (unsigned int)((unsigned long)offset)); \
83} 130}
131DEFINE_BASIC_FETCH_FUNCS(stack)
84 132
85static __kprobes unsigned long fetch_memory(struct pt_regs *regs, void *addr) 133#define DEFINE_FETCH_retval(type) \
86{ 134static __kprobes void FETCH_FUNC_NAME(retval, type)(struct pt_regs *regs,\
87 unsigned long retval; 135 void *dummy, void *dest) \
88 136{ \
89 if (probe_kernel_address(addr, retval)) 137 *(type *)dest = (type)regs_return_value(regs); \
90 return 0;
91 return retval;
92} 138}
93 139DEFINE_BASIC_FETCH_FUNCS(retval)
94static __kprobes unsigned long fetch_retvalue(struct pt_regs *regs, 140
95 void *dummy) 141#define DEFINE_FETCH_memory(type) \
96{ 142static __kprobes void FETCH_FUNC_NAME(memory, type)(struct pt_regs *regs,\
97 return regs_return_value(regs); 143 void *addr, void *dest) \
98} 144{ \
99 145 type retval; \
100static __kprobes unsigned long fetch_stack_address(struct pt_regs *regs, 146 if (probe_kernel_address(addr, retval)) \
101 void *dummy) 147 *(type *)dest = 0; \
102{ 148 else \
103 return kernel_stack_pointer(regs); 149 *(type *)dest = retval; \
104} 150}
151DEFINE_BASIC_FETCH_FUNCS(memory)
105 152
106/* Memory fetching by symbol */ 153/* Memory fetching by symbol */
107struct symbol_cache { 154struct symbol_cache {
@@ -145,51 +192,126 @@ static struct symbol_cache *alloc_symbol_cache(const char *sym, long offset)
145 return sc; 192 return sc;
146} 193}
147 194
148static __kprobes unsigned long fetch_symbol(struct pt_regs *regs, void *data) 195#define DEFINE_FETCH_symbol(type) \
149{ 196static __kprobes void FETCH_FUNC_NAME(symbol, type)(struct pt_regs *regs,\
150 struct symbol_cache *sc = data; 197 void *data, void *dest) \
151 198{ \
152 if (sc->addr) 199 struct symbol_cache *sc = data; \
153 return fetch_memory(regs, (void *)sc->addr); 200 if (sc->addr) \
154 else 201 fetch_memory_##type(regs, (void *)sc->addr, dest); \
155 return 0; 202 else \
203 *(type *)dest = 0; \
156} 204}
205DEFINE_BASIC_FETCH_FUNCS(symbol)
157 206
158/* Special indirect memory access interface */ 207/* Dereference memory access function */
159struct indirect_fetch_data { 208struct deref_fetch_param {
160 struct fetch_func orig; 209 struct fetch_param orig;
161 long offset; 210 long offset;
162}; 211};
163 212
164static __kprobes unsigned long fetch_indirect(struct pt_regs *regs, void *data) 213#define DEFINE_FETCH_deref(type) \
165{ 214static __kprobes void FETCH_FUNC_NAME(deref, type)(struct pt_regs *regs,\
166 struct indirect_fetch_data *ind = data; 215 void *data, void *dest) \
167 unsigned long addr; 216{ \
168 217 struct deref_fetch_param *dprm = data; \
169 addr = call_fetch(&ind->orig, regs); 218 unsigned long addr; \
170 if (addr) { 219 call_fetch(&dprm->orig, regs, &addr); \
171 addr += ind->offset; 220 if (addr) { \
172 return fetch_memory(regs, (void *)addr); 221 addr += dprm->offset; \
173 } else 222 fetch_memory_##type(regs, (void *)addr, dest); \
174 return 0; 223 } else \
224 *(type *)dest = 0; \
175} 225}
226DEFINE_BASIC_FETCH_FUNCS(deref)
176 227
177static __kprobes void free_indirect_fetch_data(struct indirect_fetch_data *data) 228static __kprobes void free_deref_fetch_param(struct deref_fetch_param *data)
178{ 229{
179 if (data->orig.func == fetch_indirect) 230 if (CHECK_BASIC_FETCH_FUNCS(deref, data->orig.fn))
180 free_indirect_fetch_data(data->orig.data); 231 free_deref_fetch_param(data->orig.data);
181 else if (data->orig.func == fetch_symbol) 232 else if (CHECK_BASIC_FETCH_FUNCS(symbol, data->orig.fn))
182 free_symbol_cache(data->orig.data); 233 free_symbol_cache(data->orig.data);
183 kfree(data); 234 kfree(data);
184} 235}
185 236
237/* Default (unsigned long) fetch type */
238#define __DEFAULT_FETCH_TYPE(t) u##t
239#define _DEFAULT_FETCH_TYPE(t) __DEFAULT_FETCH_TYPE(t)
240#define DEFAULT_FETCH_TYPE _DEFAULT_FETCH_TYPE(BITS_PER_LONG)
241#define DEFAULT_FETCH_TYPE_STR __stringify(DEFAULT_FETCH_TYPE)
242
243#define ASSIGN_FETCH_FUNC(kind, type) \
244 .kind = FETCH_FUNC_NAME(kind, type)
245
246#define ASSIGN_FETCH_TYPE(ptype, ftype, sign) \
247 {.name = #ptype, \
248 .size = sizeof(ftype), \
249 .is_signed = sign, \
250 .print = PRINT_TYPE_FUNC_NAME(ptype), \
251 .fmt = PRINT_TYPE_FMT_NAME(ptype), \
252ASSIGN_FETCH_FUNC(reg, ftype), \
253ASSIGN_FETCH_FUNC(stack, ftype), \
254ASSIGN_FETCH_FUNC(retval, ftype), \
255ASSIGN_FETCH_FUNC(memory, ftype), \
256ASSIGN_FETCH_FUNC(symbol, ftype), \
257ASSIGN_FETCH_FUNC(deref, ftype), \
258 }
259
260/* Fetch type information table */
261static const struct fetch_type {
262 const char *name; /* Name of type */
263 size_t size; /* Byte size of type */
264 int is_signed; /* Signed flag */
265 print_type_func_t print; /* Print functions */
266 const char *fmt; /* Fromat string */
267 /* Fetch functions */
268 fetch_func_t reg;
269 fetch_func_t stack;
270 fetch_func_t retval;
271 fetch_func_t memory;
272 fetch_func_t symbol;
273 fetch_func_t deref;
274} fetch_type_table[] = {
275 ASSIGN_FETCH_TYPE(u8, u8, 0),
276 ASSIGN_FETCH_TYPE(u16, u16, 0),
277 ASSIGN_FETCH_TYPE(u32, u32, 0),
278 ASSIGN_FETCH_TYPE(u64, u64, 0),
279 ASSIGN_FETCH_TYPE(s8, u8, 1),
280 ASSIGN_FETCH_TYPE(s16, u16, 1),
281 ASSIGN_FETCH_TYPE(s32, u32, 1),
282 ASSIGN_FETCH_TYPE(s64, u64, 1),
283};
284
285static const struct fetch_type *find_fetch_type(const char *type)
286{
287 int i;
288
289 if (!type)
290 type = DEFAULT_FETCH_TYPE_STR;
291
292 for (i = 0; i < ARRAY_SIZE(fetch_type_table); i++)
293 if (strcmp(type, fetch_type_table[i].name) == 0)
294 return &fetch_type_table[i];
295 return NULL;
296}
297
298/* Special function : only accept unsigned long */
299static __kprobes void fetch_stack_address(struct pt_regs *regs,
300 void *dummy, void *dest)
301{
302 *(unsigned long *)dest = kernel_stack_pointer(regs);
303}
304
186/** 305/**
187 * Kprobe event core functions 306 * Kprobe event core functions
188 */ 307 */
189 308
190struct probe_arg { 309struct probe_arg {
191 struct fetch_func fetch; 310 struct fetch_param fetch;
192 const char *name; 311 unsigned int offset; /* Offset from argument entry */
312 const char *name; /* Name of this argument */
313 const char *comm; /* Command of this argument */
314 const struct fetch_type *type; /* Type of this argument */
193}; 315};
194 316
195/* Flags for trace_probe */ 317/* Flags for trace_probe */
@@ -204,6 +326,7 @@ struct trace_probe {
204 const char *symbol; /* symbol name */ 326 const char *symbol; /* symbol name */
205 struct ftrace_event_call call; 327 struct ftrace_event_call call;
206 struct trace_event event; 328 struct trace_event event;
329 ssize_t size; /* trace entry size */
207 unsigned int nr_args; 330 unsigned int nr_args;
208 struct probe_arg args[]; 331 struct probe_arg args[];
209}; 332};
@@ -212,6 +335,7 @@ struct trace_probe {
212 (offsetof(struct trace_probe, args) + \ 335 (offsetof(struct trace_probe, args) + \
213 (sizeof(struct probe_arg) * (n))) 336 (sizeof(struct probe_arg) * (n)))
214 337
338
215static __kprobes int probe_is_return(struct trace_probe *tp) 339static __kprobes int probe_is_return(struct trace_probe *tp)
216{ 340{
217 return tp->rp.handler != NULL; 341 return tp->rp.handler != NULL;
@@ -222,49 +346,6 @@ static __kprobes const char *probe_symbol(struct trace_probe *tp)
222 return tp->symbol ? tp->symbol : "unknown"; 346 return tp->symbol ? tp->symbol : "unknown";
223} 347}
224 348
225static int probe_arg_string(char *buf, size_t n, struct fetch_func *ff)
226{
227 int ret = -EINVAL;
228
229 if (ff->func == fetch_register) {
230 const char *name;
231 name = regs_query_register_name((unsigned int)((long)ff->data));
232 ret = snprintf(buf, n, "%%%s", name);
233 } else if (ff->func == fetch_stack)
234 ret = snprintf(buf, n, "$stack%lu", (unsigned long)ff->data);
235 else if (ff->func == fetch_memory)
236 ret = snprintf(buf, n, "@0x%p", ff->data);
237 else if (ff->func == fetch_symbol) {
238 struct symbol_cache *sc = ff->data;
239 if (sc->offset)
240 ret = snprintf(buf, n, "@%s%+ld", sc->symbol,
241 sc->offset);
242 else
243 ret = snprintf(buf, n, "@%s", sc->symbol);
244 } else if (ff->func == fetch_retvalue)
245 ret = snprintf(buf, n, "$retval");
246 else if (ff->func == fetch_stack_address)
247 ret = snprintf(buf, n, "$stack");
248 else if (ff->func == fetch_indirect) {
249 struct indirect_fetch_data *id = ff->data;
250 size_t l = 0;
251 ret = snprintf(buf, n, "%+ld(", id->offset);
252 if (ret >= n)
253 goto end;
254 l += ret;
255 ret = probe_arg_string(buf + l, n - l, &id->orig);
256 if (ret < 0)
257 goto end;
258 l += ret;
259 ret = snprintf(buf + l, n - l, ")");
260 ret += l;
261 }
262end:
263 if (ret >= n)
264 return -ENOSPC;
265 return ret;
266}
267
268static int register_probe_event(struct trace_probe *tp); 349static int register_probe_event(struct trace_probe *tp);
269static void unregister_probe_event(struct trace_probe *tp); 350static void unregister_probe_event(struct trace_probe *tp);
270 351
@@ -347,11 +428,12 @@ error:
347 428
348static void free_probe_arg(struct probe_arg *arg) 429static void free_probe_arg(struct probe_arg *arg)
349{ 430{
350 if (arg->fetch.func == fetch_symbol) 431 if (CHECK_BASIC_FETCH_FUNCS(deref, arg->fetch.fn))
432 free_deref_fetch_param(arg->fetch.data);
433 else if (CHECK_BASIC_FETCH_FUNCS(symbol, arg->fetch.fn))
351 free_symbol_cache(arg->fetch.data); 434 free_symbol_cache(arg->fetch.data);
352 else if (arg->fetch.func == fetch_indirect)
353 free_indirect_fetch_data(arg->fetch.data);
354 kfree(arg->name); 435 kfree(arg->name);
436 kfree(arg->comm);
355} 437}
356 438
357static void free_trace_probe(struct trace_probe *tp) 439static void free_trace_probe(struct trace_probe *tp)
@@ -457,28 +539,30 @@ static int split_symbol_offset(char *symbol, unsigned long *offset)
457#define PARAM_MAX_ARGS 16 539#define PARAM_MAX_ARGS 16
458#define PARAM_MAX_STACK (THREAD_SIZE / sizeof(unsigned long)) 540#define PARAM_MAX_STACK (THREAD_SIZE / sizeof(unsigned long))
459 541
460static int parse_probe_vars(char *arg, struct fetch_func *ff, int is_return) 542static int parse_probe_vars(char *arg, const struct fetch_type *t,
543 struct fetch_param *f, int is_return)
461{ 544{
462 int ret = 0; 545 int ret = 0;
463 unsigned long param; 546 unsigned long param;
464 547
465 if (strcmp(arg, "retval") == 0) { 548 if (strcmp(arg, "retval") == 0) {
466 if (is_return) { 549 if (is_return)
467 ff->func = fetch_retvalue; 550 f->fn = t->retval;
468 ff->data = NULL; 551 else
469 } else
470 ret = -EINVAL; 552 ret = -EINVAL;
471 } else if (strncmp(arg, "stack", 5) == 0) { 553 } else if (strncmp(arg, "stack", 5) == 0) {
472 if (arg[5] == '\0') { 554 if (arg[5] == '\0') {
473 ff->func = fetch_stack_address; 555 if (strcmp(t->name, DEFAULT_FETCH_TYPE_STR) == 0)
474 ff->data = NULL; 556 f->fn = fetch_stack_address;
557 else
558 ret = -EINVAL;
475 } else if (isdigit(arg[5])) { 559 } else if (isdigit(arg[5])) {
476 ret = strict_strtoul(arg + 5, 10, &param); 560 ret = strict_strtoul(arg + 5, 10, &param);
477 if (ret || param > PARAM_MAX_STACK) 561 if (ret || param > PARAM_MAX_STACK)
478 ret = -EINVAL; 562 ret = -EINVAL;
479 else { 563 else {
480 ff->func = fetch_stack; 564 f->fn = t->stack;
481 ff->data = (void *)param; 565 f->data = (void *)param;
482 } 566 }
483 } else 567 } else
484 ret = -EINVAL; 568 ret = -EINVAL;
@@ -488,7 +572,8 @@ static int parse_probe_vars(char *arg, struct fetch_func *ff, int is_return)
488} 572}
489 573
490/* Recursive argument parser */ 574/* Recursive argument parser */
491static int __parse_probe_arg(char *arg, struct fetch_func *ff, int is_return) 575static int __parse_probe_arg(char *arg, const struct fetch_type *t,
576 struct fetch_param *f, int is_return)
492{ 577{
493 int ret = 0; 578 int ret = 0;
494 unsigned long param; 579 unsigned long param;
@@ -497,13 +582,13 @@ static int __parse_probe_arg(char *arg, struct fetch_func *ff, int is_return)
497 582
498 switch (arg[0]) { 583 switch (arg[0]) {
499 case '$': 584 case '$':
500 ret = parse_probe_vars(arg + 1, ff, is_return); 585 ret = parse_probe_vars(arg + 1, t, f, is_return);
501 break; 586 break;
502 case '%': /* named register */ 587 case '%': /* named register */
503 ret = regs_query_register_offset(arg + 1); 588 ret = regs_query_register_offset(arg + 1);
504 if (ret >= 0) { 589 if (ret >= 0) {
505 ff->func = fetch_register; 590 f->fn = t->reg;
506 ff->data = (void *)(unsigned long)ret; 591 f->data = (void *)(unsigned long)ret;
507 ret = 0; 592 ret = 0;
508 } 593 }
509 break; 594 break;
@@ -512,26 +597,22 @@ static int __parse_probe_arg(char *arg, struct fetch_func *ff, int is_return)
512 ret = strict_strtoul(arg + 1, 0, &param); 597 ret = strict_strtoul(arg + 1, 0, &param);
513 if (ret) 598 if (ret)
514 break; 599 break;
515 ff->func = fetch_memory; 600 f->fn = t->memory;
516 ff->data = (void *)param; 601 f->data = (void *)param;
517 } else { 602 } else {
518 ret = split_symbol_offset(arg + 1, &offset); 603 ret = split_symbol_offset(arg + 1, &offset);
519 if (ret) 604 if (ret)
520 break; 605 break;
521 ff->data = alloc_symbol_cache(arg + 1, offset); 606 f->data = alloc_symbol_cache(arg + 1, offset);
522 if (ff->data) 607 if (f->data)
523 ff->func = fetch_symbol; 608 f->fn = t->symbol;
524 else
525 ret = -EINVAL;
526 } 609 }
527 break; 610 break;
528 case '+': /* indirect memory */ 611 case '+': /* deref memory */
529 case '-': 612 case '-':
530 tmp = strchr(arg, '('); 613 tmp = strchr(arg, '(');
531 if (!tmp) { 614 if (!tmp)
532 ret = -EINVAL;
533 break; 615 break;
534 }
535 *tmp = '\0'; 616 *tmp = '\0';
536 ret = strict_strtol(arg + 1, 0, &offset); 617 ret = strict_strtol(arg + 1, 0, &offset);
537 if (ret) 618 if (ret)
@@ -541,38 +622,58 @@ static int __parse_probe_arg(char *arg, struct fetch_func *ff, int is_return)
541 arg = tmp + 1; 622 arg = tmp + 1;
542 tmp = strrchr(arg, ')'); 623 tmp = strrchr(arg, ')');
543 if (tmp) { 624 if (tmp) {
544 struct indirect_fetch_data *id; 625 struct deref_fetch_param *dprm;
626 const struct fetch_type *t2 = find_fetch_type(NULL);
545 *tmp = '\0'; 627 *tmp = '\0';
546 id = kzalloc(sizeof(struct indirect_fetch_data), 628 dprm = kzalloc(sizeof(struct deref_fetch_param),
547 GFP_KERNEL); 629 GFP_KERNEL);
548 if (!id) 630 if (!dprm)
549 return -ENOMEM; 631 return -ENOMEM;
550 id->offset = offset; 632 dprm->offset = offset;
551 ret = __parse_probe_arg(arg, &id->orig, is_return); 633 ret = __parse_probe_arg(arg, t2, &dprm->orig,
634 is_return);
552 if (ret) 635 if (ret)
553 kfree(id); 636 kfree(dprm);
554 else { 637 else {
555 ff->func = fetch_indirect; 638 f->fn = t->deref;
556 ff->data = (void *)id; 639 f->data = (void *)dprm;
557 } 640 }
558 } else 641 }
559 ret = -EINVAL;
560 break; 642 break;
561 default:
562 /* TODO: support custom handler */
563 ret = -EINVAL;
564 } 643 }
644 if (!ret && !f->fn)
645 ret = -EINVAL;
565 return ret; 646 return ret;
566} 647}
567 648
568/* String length checking wrapper */ 649/* String length checking wrapper */
569static int parse_probe_arg(char *arg, struct fetch_func *ff, int is_return) 650static int parse_probe_arg(char *arg, struct trace_probe *tp,
651 struct probe_arg *parg, int is_return)
570{ 652{
653 const char *t;
654
571 if (strlen(arg) > MAX_ARGSTR_LEN) { 655 if (strlen(arg) > MAX_ARGSTR_LEN) {
572 pr_info("Argument is too long.: %s\n", arg); 656 pr_info("Argument is too long.: %s\n", arg);
573 return -ENOSPC; 657 return -ENOSPC;
574 } 658 }
575 return __parse_probe_arg(arg, ff, is_return); 659 parg->comm = kstrdup(arg, GFP_KERNEL);
660 if (!parg->comm) {
661 pr_info("Failed to allocate memory for command '%s'.\n", arg);
662 return -ENOMEM;
663 }
664 t = strchr(parg->comm, ':');
665 if (t) {
666 arg[t - parg->comm] = '\0';
667 t++;
668 }
669 parg->type = find_fetch_type(t);
670 if (!parg->type) {
671 pr_info("Unsupported type: %s\n", t);
672 return -EINVAL;
673 }
674 parg->offset = tp->size;
675 tp->size += parg->type->size;
676 return __parse_probe_arg(arg, parg->type, &parg->fetch, is_return);
576} 677}
577 678
578/* Return 1 if name is reserved or already used by another argument */ 679/* Return 1 if name is reserved or already used by another argument */
@@ -602,15 +703,18 @@ static int create_trace_probe(int argc, char **argv)
602 * @ADDR : fetch memory at ADDR (ADDR should be in kernel) 703 * @ADDR : fetch memory at ADDR (ADDR should be in kernel)
603 * @SYM[+|-offs] : fetch memory at SYM +|- offs (SYM is a data symbol) 704 * @SYM[+|-offs] : fetch memory at SYM +|- offs (SYM is a data symbol)
604 * %REG : fetch register REG 705 * %REG : fetch register REG
605 * Indirect memory fetch: 706 * Dereferencing memory fetch:
606 * +|-offs(ARG) : fetch memory at ARG +|- offs address. 707 * +|-offs(ARG) : fetch memory at ARG +|- offs address.
607 * Alias name of args: 708 * Alias name of args:
608 * NAME=FETCHARG : set NAME as alias of FETCHARG. 709 * NAME=FETCHARG : set NAME as alias of FETCHARG.
710 * Type of args:
711 * FETCHARG:TYPE : use TYPE instead of unsigned long.
609 */ 712 */
610 struct trace_probe *tp; 713 struct trace_probe *tp;
611 int i, ret = 0; 714 int i, ret = 0;
612 int is_return = 0, is_delete = 0; 715 int is_return = 0, is_delete = 0;
613 char *symbol = NULL, *event = NULL, *arg = NULL, *group = NULL; 716 char *symbol = NULL, *event = NULL, *group = NULL;
717 char *arg, *tmp;
614 unsigned long offset = 0; 718 unsigned long offset = 0;
615 void *addr = NULL; 719 void *addr = NULL;
616 char buf[MAX_EVENT_NAME_LEN]; 720 char buf[MAX_EVENT_NAME_LEN];
@@ -723,13 +827,6 @@ static int create_trace_probe(int argc, char **argv)
723 else 827 else
724 arg = argv[i]; 828 arg = argv[i];
725 829
726 if (conflict_field_name(argv[i], tp->args, i)) {
727 pr_info("Argument%d name '%s' conflicts with "
728 "another field.\n", i, argv[i]);
729 ret = -EINVAL;
730 goto error;
731 }
732
733 tp->args[i].name = kstrdup(argv[i], GFP_KERNEL); 830 tp->args[i].name = kstrdup(argv[i], GFP_KERNEL);
734 if (!tp->args[i].name) { 831 if (!tp->args[i].name) {
735 pr_info("Failed to allocate argument%d name '%s'.\n", 832 pr_info("Failed to allocate argument%d name '%s'.\n",
@@ -737,9 +834,19 @@ static int create_trace_probe(int argc, char **argv)
737 ret = -ENOMEM; 834 ret = -ENOMEM;
738 goto error; 835 goto error;
739 } 836 }
837 tmp = strchr(tp->args[i].name, ':');
838 if (tmp)
839 *tmp = '_'; /* convert : to _ */
840
841 if (conflict_field_name(tp->args[i].name, tp->args, i)) {
842 pr_info("Argument%d name '%s' conflicts with "
843 "another field.\n", i, argv[i]);
844 ret = -EINVAL;
845 goto error;
846 }
740 847
741 /* Parse fetch argument */ 848 /* Parse fetch argument */
742 ret = parse_probe_arg(arg, &tp->args[i].fetch, is_return); 849 ret = parse_probe_arg(arg, tp, &tp->args[i], is_return);
743 if (ret) { 850 if (ret) {
744 pr_info("Parse error at argument%d. (%d)\n", i, ret); 851 pr_info("Parse error at argument%d. (%d)\n", i, ret);
745 kfree(tp->args[i].name); 852 kfree(tp->args[i].name);
@@ -794,8 +901,7 @@ static void probes_seq_stop(struct seq_file *m, void *v)
794static int probes_seq_show(struct seq_file *m, void *v) 901static int probes_seq_show(struct seq_file *m, void *v)
795{ 902{
796 struct trace_probe *tp = v; 903 struct trace_probe *tp = v;
797 int i, ret; 904 int i;
798 char buf[MAX_ARGSTR_LEN + 1];
799 905
800 seq_printf(m, "%c", probe_is_return(tp) ? 'r' : 'p'); 906 seq_printf(m, "%c", probe_is_return(tp) ? 'r' : 'p');
801 seq_printf(m, ":%s/%s", tp->call.system, tp->call.name); 907 seq_printf(m, ":%s/%s", tp->call.system, tp->call.name);
@@ -807,15 +913,10 @@ static int probes_seq_show(struct seq_file *m, void *v)
807 else 913 else
808 seq_printf(m, " %s", probe_symbol(tp)); 914 seq_printf(m, " %s", probe_symbol(tp));
809 915
810 for (i = 0; i < tp->nr_args; i++) { 916 for (i = 0; i < tp->nr_args; i++)
811 ret = probe_arg_string(buf, MAX_ARGSTR_LEN, &tp->args[i].fetch); 917 seq_printf(m, " %s=%s", tp->args[i].name, tp->args[i].comm);
812 if (ret < 0) {
813 pr_warning("Argument%d decoding error(%d).\n", i, ret);
814 return ret;
815 }
816 seq_printf(m, " %s=%s", tp->args[i].name, buf);
817 }
818 seq_printf(m, "\n"); 918 seq_printf(m, "\n");
919
819 return 0; 920 return 0;
820} 921}
821 922
@@ -945,9 +1046,10 @@ static const struct file_operations kprobe_profile_ops = {
945static __kprobes void kprobe_trace_func(struct kprobe *kp, struct pt_regs *regs) 1046static __kprobes void kprobe_trace_func(struct kprobe *kp, struct pt_regs *regs)
946{ 1047{
947 struct trace_probe *tp = container_of(kp, struct trace_probe, rp.kp); 1048 struct trace_probe *tp = container_of(kp, struct trace_probe, rp.kp);
948 struct kprobe_trace_entry *entry; 1049 struct kprobe_trace_entry_head *entry;
949 struct ring_buffer_event *event; 1050 struct ring_buffer_event *event;
950 struct ring_buffer *buffer; 1051 struct ring_buffer *buffer;
1052 u8 *data;
951 int size, i, pc; 1053 int size, i, pc;
952 unsigned long irq_flags; 1054 unsigned long irq_flags;
953 struct ftrace_event_call *call = &tp->call; 1055 struct ftrace_event_call *call = &tp->call;
@@ -957,7 +1059,7 @@ static __kprobes void kprobe_trace_func(struct kprobe *kp, struct pt_regs *regs)
957 local_save_flags(irq_flags); 1059 local_save_flags(irq_flags);
958 pc = preempt_count(); 1060 pc = preempt_count();
959 1061
960 size = SIZEOF_KPROBE_TRACE_ENTRY(tp->nr_args); 1062 size = sizeof(*entry) + tp->size;
961 1063
962 event = trace_current_buffer_lock_reserve(&buffer, call->id, size, 1064 event = trace_current_buffer_lock_reserve(&buffer, call->id, size,
963 irq_flags, pc); 1065 irq_flags, pc);
@@ -965,10 +1067,10 @@ static __kprobes void kprobe_trace_func(struct kprobe *kp, struct pt_regs *regs)
965 return; 1067 return;
966 1068
967 entry = ring_buffer_event_data(event); 1069 entry = ring_buffer_event_data(event);
968 entry->nargs = tp->nr_args;
969 entry->ip = (unsigned long)kp->addr; 1070 entry->ip = (unsigned long)kp->addr;
1071 data = (u8 *)&entry[1];
970 for (i = 0; i < tp->nr_args; i++) 1072 for (i = 0; i < tp->nr_args; i++)
971 entry->args[i] = call_fetch(&tp->args[i].fetch, regs); 1073 call_fetch(&tp->args[i].fetch, regs, data + tp->args[i].offset);
972 1074
973 if (!filter_current_check_discard(buffer, call, entry, event)) 1075 if (!filter_current_check_discard(buffer, call, entry, event))
974 trace_nowake_buffer_unlock_commit(buffer, event, irq_flags, pc); 1076 trace_nowake_buffer_unlock_commit(buffer, event, irq_flags, pc);
@@ -979,9 +1081,10 @@ static __kprobes void kretprobe_trace_func(struct kretprobe_instance *ri,
979 struct pt_regs *regs) 1081 struct pt_regs *regs)
980{ 1082{
981 struct trace_probe *tp = container_of(ri->rp, struct trace_probe, rp); 1083 struct trace_probe *tp = container_of(ri->rp, struct trace_probe, rp);
982 struct kretprobe_trace_entry *entry; 1084 struct kretprobe_trace_entry_head *entry;
983 struct ring_buffer_event *event; 1085 struct ring_buffer_event *event;
984 struct ring_buffer *buffer; 1086 struct ring_buffer *buffer;
1087 u8 *data;
985 int size, i, pc; 1088 int size, i, pc;
986 unsigned long irq_flags; 1089 unsigned long irq_flags;
987 struct ftrace_event_call *call = &tp->call; 1090 struct ftrace_event_call *call = &tp->call;
@@ -989,7 +1092,7 @@ static __kprobes void kretprobe_trace_func(struct kretprobe_instance *ri,
989 local_save_flags(irq_flags); 1092 local_save_flags(irq_flags);
990 pc = preempt_count(); 1093 pc = preempt_count();
991 1094
992 size = SIZEOF_KRETPROBE_TRACE_ENTRY(tp->nr_args); 1095 size = sizeof(*entry) + tp->size;
993 1096
994 event = trace_current_buffer_lock_reserve(&buffer, call->id, size, 1097 event = trace_current_buffer_lock_reserve(&buffer, call->id, size,
995 irq_flags, pc); 1098 irq_flags, pc);
@@ -997,11 +1100,11 @@ static __kprobes void kretprobe_trace_func(struct kretprobe_instance *ri,
997 return; 1100 return;
998 1101
999 entry = ring_buffer_event_data(event); 1102 entry = ring_buffer_event_data(event);
1000 entry->nargs = tp->nr_args;
1001 entry->func = (unsigned long)tp->rp.kp.addr; 1103 entry->func = (unsigned long)tp->rp.kp.addr;
1002 entry->ret_ip = (unsigned long)ri->ret_addr; 1104 entry->ret_ip = (unsigned long)ri->ret_addr;
1105 data = (u8 *)&entry[1];
1003 for (i = 0; i < tp->nr_args; i++) 1106 for (i = 0; i < tp->nr_args; i++)
1004 entry->args[i] = call_fetch(&tp->args[i].fetch, regs); 1107 call_fetch(&tp->args[i].fetch, regs, data + tp->args[i].offset);
1005 1108
1006 if (!filter_current_check_discard(buffer, call, entry, event)) 1109 if (!filter_current_check_discard(buffer, call, entry, event))
1007 trace_nowake_buffer_unlock_commit(buffer, event, irq_flags, pc); 1110 trace_nowake_buffer_unlock_commit(buffer, event, irq_flags, pc);
@@ -1011,13 +1114,14 @@ static __kprobes void kretprobe_trace_func(struct kretprobe_instance *ri,
1011enum print_line_t 1114enum print_line_t
1012print_kprobe_event(struct trace_iterator *iter, int flags) 1115print_kprobe_event(struct trace_iterator *iter, int flags)
1013{ 1116{
1014 struct kprobe_trace_entry *field; 1117 struct kprobe_trace_entry_head *field;
1015 struct trace_seq *s = &iter->seq; 1118 struct trace_seq *s = &iter->seq;
1016 struct trace_event *event; 1119 struct trace_event *event;
1017 struct trace_probe *tp; 1120 struct trace_probe *tp;
1121 u8 *data;
1018 int i; 1122 int i;
1019 1123
1020 field = (struct kprobe_trace_entry *)iter->ent; 1124 field = (struct kprobe_trace_entry_head *)iter->ent;
1021 event = ftrace_find_event(field->ent.type); 1125 event = ftrace_find_event(field->ent.type);
1022 tp = container_of(event, struct trace_probe, event); 1126 tp = container_of(event, struct trace_probe, event);
1023 1127
@@ -1030,9 +1134,10 @@ print_kprobe_event(struct trace_iterator *iter, int flags)
1030 if (!trace_seq_puts(s, ")")) 1134 if (!trace_seq_puts(s, ")"))
1031 goto partial; 1135 goto partial;
1032 1136
1033 for (i = 0; i < field->nargs; i++) 1137 data = (u8 *)&field[1];
1034 if (!trace_seq_printf(s, " %s=%lx", 1138 for (i = 0; i < tp->nr_args; i++)
1035 tp->args[i].name, field->args[i])) 1139 if (!tp->args[i].type->print(s, tp->args[i].name,
1140 data + tp->args[i].offset))
1036 goto partial; 1141 goto partial;
1037 1142
1038 if (!trace_seq_puts(s, "\n")) 1143 if (!trace_seq_puts(s, "\n"))
@@ -1046,13 +1151,14 @@ partial:
1046enum print_line_t 1151enum print_line_t
1047print_kretprobe_event(struct trace_iterator *iter, int flags) 1152print_kretprobe_event(struct trace_iterator *iter, int flags)
1048{ 1153{
1049 struct kretprobe_trace_entry *field; 1154 struct kretprobe_trace_entry_head *field;
1050 struct trace_seq *s = &iter->seq; 1155 struct trace_seq *s = &iter->seq;
1051 struct trace_event *event; 1156 struct trace_event *event;
1052 struct trace_probe *tp; 1157 struct trace_probe *tp;
1158 u8 *data;
1053 int i; 1159 int i;
1054 1160
1055 field = (struct kretprobe_trace_entry *)iter->ent; 1161 field = (struct kretprobe_trace_entry_head *)iter->ent;
1056 event = ftrace_find_event(field->ent.type); 1162 event = ftrace_find_event(field->ent.type);
1057 tp = container_of(event, struct trace_probe, event); 1163 tp = container_of(event, struct trace_probe, event);
1058 1164
@@ -1071,9 +1177,10 @@ print_kretprobe_event(struct trace_iterator *iter, int flags)
1071 if (!trace_seq_puts(s, ")")) 1177 if (!trace_seq_puts(s, ")"))
1072 goto partial; 1178 goto partial;
1073 1179
1074 for (i = 0; i < field->nargs; i++) 1180 data = (u8 *)&field[1];
1075 if (!trace_seq_printf(s, " %s=%lx", 1181 for (i = 0; i < tp->nr_args; i++)
1076 tp->args[i].name, field->args[i])) 1182 if (!tp->args[i].type->print(s, tp->args[i].name,
1183 data + tp->args[i].offset))
1077 goto partial; 1184 goto partial;
1078 1185
1079 if (!trace_seq_puts(s, "\n")) 1186 if (!trace_seq_puts(s, "\n"))
@@ -1129,29 +1236,43 @@ static int probe_event_raw_init(struct ftrace_event_call *event_call)
1129static int kprobe_event_define_fields(struct ftrace_event_call *event_call) 1236static int kprobe_event_define_fields(struct ftrace_event_call *event_call)
1130{ 1237{
1131 int ret, i; 1238 int ret, i;
1132 struct kprobe_trace_entry field; 1239 struct kprobe_trace_entry_head field;
1133 struct trace_probe *tp = (struct trace_probe *)event_call->data; 1240 struct trace_probe *tp = (struct trace_probe *)event_call->data;
1134 1241
1135 DEFINE_FIELD(unsigned long, ip, FIELD_STRING_IP, 0); 1242 DEFINE_FIELD(unsigned long, ip, FIELD_STRING_IP, 0);
1136 DEFINE_FIELD(int, nargs, FIELD_STRING_NARGS, 1);
1137 /* Set argument names as fields */ 1243 /* Set argument names as fields */
1138 for (i = 0; i < tp->nr_args; i++) 1244 for (i = 0; i < tp->nr_args; i++) {
1139 DEFINE_FIELD(unsigned long, args[i], tp->args[i].name, 0); 1245 ret = trace_define_field(event_call, tp->args[i].type->name,
1246 tp->args[i].name,
1247 sizeof(field) + tp->args[i].offset,
1248 tp->args[i].type->size,
1249 tp->args[i].type->is_signed,
1250 FILTER_OTHER);
1251 if (ret)
1252 return ret;
1253 }
1140 return 0; 1254 return 0;
1141} 1255}
1142 1256
1143static int kretprobe_event_define_fields(struct ftrace_event_call *event_call) 1257static int kretprobe_event_define_fields(struct ftrace_event_call *event_call)
1144{ 1258{
1145 int ret, i; 1259 int ret, i;
1146 struct kretprobe_trace_entry field; 1260 struct kretprobe_trace_entry_head field;
1147 struct trace_probe *tp = (struct trace_probe *)event_call->data; 1261 struct trace_probe *tp = (struct trace_probe *)event_call->data;
1148 1262
1149 DEFINE_FIELD(unsigned long, func, FIELD_STRING_FUNC, 0); 1263 DEFINE_FIELD(unsigned long, func, FIELD_STRING_FUNC, 0);
1150 DEFINE_FIELD(unsigned long, ret_ip, FIELD_STRING_RETIP, 0); 1264 DEFINE_FIELD(unsigned long, ret_ip, FIELD_STRING_RETIP, 0);
1151 DEFINE_FIELD(int, nargs, FIELD_STRING_NARGS, 1);
1152 /* Set argument names as fields */ 1265 /* Set argument names as fields */
1153 for (i = 0; i < tp->nr_args; i++) 1266 for (i = 0; i < tp->nr_args; i++) {
1154 DEFINE_FIELD(unsigned long, args[i], tp->args[i].name, 0); 1267 ret = trace_define_field(event_call, tp->args[i].type->name,
1268 tp->args[i].name,
1269 sizeof(field) + tp->args[i].offset,
1270 tp->args[i].type->size,
1271 tp->args[i].type->is_signed,
1272 FILTER_OTHER);
1273 if (ret)
1274 return ret;
1275 }
1155 return 0; 1276 return 0;
1156} 1277}
1157 1278
@@ -1176,8 +1297,8 @@ static int __set_print_fmt(struct trace_probe *tp, char *buf, int len)
1176 pos += snprintf(buf + pos, LEN_OR_ZERO, "\"%s", fmt); 1297 pos += snprintf(buf + pos, LEN_OR_ZERO, "\"%s", fmt);
1177 1298
1178 for (i = 0; i < tp->nr_args; i++) { 1299 for (i = 0; i < tp->nr_args; i++) {
1179 pos += snprintf(buf + pos, LEN_OR_ZERO, " %s=%%lx", 1300 pos += snprintf(buf + pos, LEN_OR_ZERO, " %s=%s",
1180 tp->args[i].name); 1301 tp->args[i].name, tp->args[i].type->fmt);
1181 } 1302 }
1182 1303
1183 pos += snprintf(buf + pos, LEN_OR_ZERO, "\", %s", arg); 1304 pos += snprintf(buf + pos, LEN_OR_ZERO, "\", %s", arg);
@@ -1219,12 +1340,13 @@ static __kprobes void kprobe_perf_func(struct kprobe *kp,
1219{ 1340{
1220 struct trace_probe *tp = container_of(kp, struct trace_probe, rp.kp); 1341 struct trace_probe *tp = container_of(kp, struct trace_probe, rp.kp);
1221 struct ftrace_event_call *call = &tp->call; 1342 struct ftrace_event_call *call = &tp->call;
1222 struct kprobe_trace_entry *entry; 1343 struct kprobe_trace_entry_head *entry;
1344 u8 *data;
1223 int size, __size, i; 1345 int size, __size, i;
1224 unsigned long irq_flags; 1346 unsigned long irq_flags;
1225 int rctx; 1347 int rctx;
1226 1348
1227 __size = SIZEOF_KPROBE_TRACE_ENTRY(tp->nr_args); 1349 __size = sizeof(*entry) + tp->size;
1228 size = ALIGN(__size + sizeof(u32), sizeof(u64)); 1350 size = ALIGN(__size + sizeof(u32), sizeof(u64));
1229 size -= sizeof(u32); 1351 size -= sizeof(u32);
1230 if (WARN_ONCE(size > PERF_MAX_TRACE_SIZE, 1352 if (WARN_ONCE(size > PERF_MAX_TRACE_SIZE,
@@ -1235,10 +1357,10 @@ static __kprobes void kprobe_perf_func(struct kprobe *kp,
1235 if (!entry) 1357 if (!entry)
1236 return; 1358 return;
1237 1359
1238 entry->nargs = tp->nr_args;
1239 entry->ip = (unsigned long)kp->addr; 1360 entry->ip = (unsigned long)kp->addr;
1361 data = (u8 *)&entry[1];
1240 for (i = 0; i < tp->nr_args; i++) 1362 for (i = 0; i < tp->nr_args; i++)
1241 entry->args[i] = call_fetch(&tp->args[i].fetch, regs); 1363 call_fetch(&tp->args[i].fetch, regs, data + tp->args[i].offset);
1242 1364
1243 perf_trace_buf_submit(entry, size, rctx, entry->ip, 1, irq_flags, regs); 1365 perf_trace_buf_submit(entry, size, rctx, entry->ip, 1, irq_flags, regs);
1244} 1366}
@@ -1249,12 +1371,13 @@ static __kprobes void kretprobe_perf_func(struct kretprobe_instance *ri,
1249{ 1371{
1250 struct trace_probe *tp = container_of(ri->rp, struct trace_probe, rp); 1372 struct trace_probe *tp = container_of(ri->rp, struct trace_probe, rp);
1251 struct ftrace_event_call *call = &tp->call; 1373 struct ftrace_event_call *call = &tp->call;
1252 struct kretprobe_trace_entry *entry; 1374 struct kretprobe_trace_entry_head *entry;
1375 u8 *data;
1253 int size, __size, i; 1376 int size, __size, i;
1254 unsigned long irq_flags; 1377 unsigned long irq_flags;
1255 int rctx; 1378 int rctx;
1256 1379
1257 __size = SIZEOF_KRETPROBE_TRACE_ENTRY(tp->nr_args); 1380 __size = sizeof(*entry) + tp->size;
1258 size = ALIGN(__size + sizeof(u32), sizeof(u64)); 1381 size = ALIGN(__size + sizeof(u32), sizeof(u64));
1259 size -= sizeof(u32); 1382 size -= sizeof(u32);
1260 if (WARN_ONCE(size > PERF_MAX_TRACE_SIZE, 1383 if (WARN_ONCE(size > PERF_MAX_TRACE_SIZE,
@@ -1265,11 +1388,11 @@ static __kprobes void kretprobe_perf_func(struct kretprobe_instance *ri,
1265 if (!entry) 1388 if (!entry)
1266 return; 1389 return;
1267 1390
1268 entry->nargs = tp->nr_args;
1269 entry->func = (unsigned long)tp->rp.kp.addr; 1391 entry->func = (unsigned long)tp->rp.kp.addr;
1270 entry->ret_ip = (unsigned long)ri->ret_addr; 1392 entry->ret_ip = (unsigned long)ri->ret_addr;
1393 data = (u8 *)&entry[1];
1271 for (i = 0; i < tp->nr_args; i++) 1394 for (i = 0; i < tp->nr_args; i++)
1272 entry->args[i] = call_fetch(&tp->args[i].fetch, regs); 1395 call_fetch(&tp->args[i].fetch, regs, data + tp->args[i].offset);
1273 1396
1274 perf_trace_buf_submit(entry, size, rctx, entry->ret_ip, 1, 1397 perf_trace_buf_submit(entry, size, rctx, entry->ret_ip, 1,
1275 irq_flags, regs); 1398 irq_flags, regs);
diff --git a/kernel/trace/trace_ksym.c b/kernel/trace/trace_ksym.c
index d59cd6879477..8eaf00749b65 100644
--- a/kernel/trace/trace_ksym.c
+++ b/kernel/trace/trace_ksym.c
@@ -34,12 +34,6 @@
34 34
35#include <asm/atomic.h> 35#include <asm/atomic.h>
36 36
37/*
38 * For now, let us restrict the no. of symbols traced simultaneously to number
39 * of available hardware breakpoint registers.
40 */
41#define KSYM_TRACER_MAX HBP_NUM
42
43#define KSYM_TRACER_OP_LEN 3 /* rw- */ 37#define KSYM_TRACER_OP_LEN 3 /* rw- */
44 38
45struct trace_ksym { 39struct trace_ksym {
@@ -53,7 +47,6 @@ struct trace_ksym {
53 47
54static struct trace_array *ksym_trace_array; 48static struct trace_array *ksym_trace_array;
55 49
56static unsigned int ksym_filter_entry_count;
57static unsigned int ksym_tracing_enabled; 50static unsigned int ksym_tracing_enabled;
58 51
59static HLIST_HEAD(ksym_filter_head); 52static HLIST_HEAD(ksym_filter_head);
@@ -181,13 +174,6 @@ int process_new_ksym_entry(char *ksymname, int op, unsigned long addr)
181 struct trace_ksym *entry; 174 struct trace_ksym *entry;
182 int ret = -ENOMEM; 175 int ret = -ENOMEM;
183 176
184 if (ksym_filter_entry_count >= KSYM_TRACER_MAX) {
185 printk(KERN_ERR "ksym_tracer: Maximum limit:(%d) reached. No"
186 " new requests for tracing can be accepted now.\n",
187 KSYM_TRACER_MAX);
188 return -ENOSPC;
189 }
190
191 entry = kzalloc(sizeof(struct trace_ksym), GFP_KERNEL); 177 entry = kzalloc(sizeof(struct trace_ksym), GFP_KERNEL);
192 if (!entry) 178 if (!entry)
193 return -ENOMEM; 179 return -ENOMEM;
@@ -203,13 +189,17 @@ int process_new_ksym_entry(char *ksymname, int op, unsigned long addr)
203 189
204 if (IS_ERR(entry->ksym_hbp)) { 190 if (IS_ERR(entry->ksym_hbp)) {
205 ret = PTR_ERR(entry->ksym_hbp); 191 ret = PTR_ERR(entry->ksym_hbp);
206 printk(KERN_INFO "ksym_tracer request failed. Try again" 192 if (ret == -ENOSPC) {
207 " later!!\n"); 193 printk(KERN_ERR "ksym_tracer: Maximum limit reached."
194 " No new requests for tracing can be accepted now.\n");
195 } else {
196 printk(KERN_INFO "ksym_tracer request failed. Try again"
197 " later!!\n");
198 }
208 goto err; 199 goto err;
209 } 200 }
210 201
211 hlist_add_head_rcu(&(entry->ksym_hlist), &ksym_filter_head); 202 hlist_add_head_rcu(&(entry->ksym_hlist), &ksym_filter_head);
212 ksym_filter_entry_count++;
213 203
214 return 0; 204 return 0;
215 205
@@ -265,7 +255,6 @@ static void __ksym_trace_reset(void)
265 hlist_for_each_entry_safe(entry, node, node1, &ksym_filter_head, 255 hlist_for_each_entry_safe(entry, node, node1, &ksym_filter_head,
266 ksym_hlist) { 256 ksym_hlist) {
267 unregister_wide_hw_breakpoint(entry->ksym_hbp); 257 unregister_wide_hw_breakpoint(entry->ksym_hbp);
268 ksym_filter_entry_count--;
269 hlist_del_rcu(&(entry->ksym_hlist)); 258 hlist_del_rcu(&(entry->ksym_hlist));
270 synchronize_rcu(); 259 synchronize_rcu();
271 kfree(entry); 260 kfree(entry);
@@ -338,7 +327,6 @@ static ssize_t ksym_trace_filter_write(struct file *file,
338 goto out_unlock; 327 goto out_unlock;
339 } 328 }
340 /* Error or "symbol:---" case: drop it */ 329 /* Error or "symbol:---" case: drop it */
341 ksym_filter_entry_count--;
342 hlist_del_rcu(&(entry->ksym_hlist)); 330 hlist_del_rcu(&(entry->ksym_hlist));
343 synchronize_rcu(); 331 synchronize_rcu();
344 kfree(entry); 332 kfree(entry);
diff --git a/kernel/trace/trace_output.c b/kernel/trace/trace_output.c
index 8e46b3323cdc..ab13d7008061 100644
--- a/kernel/trace/trace_output.c
+++ b/kernel/trace/trace_output.c
@@ -209,6 +209,7 @@ int trace_seq_putc(struct trace_seq *s, unsigned char c)
209 209
210 return 1; 210 return 1;
211} 211}
212EXPORT_SYMBOL(trace_seq_putc);
212 213
213int trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len) 214int trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len)
214{ 215{
@@ -253,7 +254,7 @@ void *trace_seq_reserve(struct trace_seq *s, size_t len)
253 void *ret; 254 void *ret;
254 255
255 if (s->full) 256 if (s->full)
256 return 0; 257 return NULL;
257 258
258 if (len > ((PAGE_SIZE - 1) - s->len)) { 259 if (len > ((PAGE_SIZE - 1) - s->len)) {
259 s->full = 1; 260 s->full = 1;
@@ -355,6 +356,21 @@ ftrace_print_symbols_seq(struct trace_seq *p, unsigned long val,
355} 356}
356EXPORT_SYMBOL(ftrace_print_symbols_seq); 357EXPORT_SYMBOL(ftrace_print_symbols_seq);
357 358
359const char *
360ftrace_print_hex_seq(struct trace_seq *p, const unsigned char *buf, int buf_len)
361{
362 int i;
363 const char *ret = p->buffer + p->len;
364
365 for (i = 0; i < buf_len; i++)
366 trace_seq_printf(p, "%s%2.2x", i == 0 ? "" : " ", buf[i]);
367
368 trace_seq_putc(p, 0);
369
370 return ret;
371}
372EXPORT_SYMBOL(ftrace_print_hex_seq);
373
358#ifdef CONFIG_KRETPROBES 374#ifdef CONFIG_KRETPROBES
359static inline const char *kretprobed(const char *name) 375static inline const char *kretprobed(const char *name)
360{ 376{
diff --git a/kernel/trace/trace_sched_switch.c b/kernel/trace/trace_sched_switch.c
index 5fca0f51fde4..a55fccfede5d 100644
--- a/kernel/trace/trace_sched_switch.c
+++ b/kernel/trace/trace_sched_switch.c
@@ -50,8 +50,7 @@ tracing_sched_switch_trace(struct trace_array *tr,
50} 50}
51 51
52static void 52static void
53probe_sched_switch(struct rq *__rq, struct task_struct *prev, 53probe_sched_switch(struct task_struct *prev, struct task_struct *next)
54 struct task_struct *next)
55{ 54{
56 struct trace_array_cpu *data; 55 struct trace_array_cpu *data;
57 unsigned long flags; 56 unsigned long flags;
@@ -109,7 +108,7 @@ tracing_sched_wakeup_trace(struct trace_array *tr,
109} 108}
110 109
111static void 110static void
112probe_sched_wakeup(struct rq *__rq, struct task_struct *wakee, int success) 111probe_sched_wakeup(struct task_struct *wakee, int success)
113{ 112{
114 struct trace_array_cpu *data; 113 struct trace_array_cpu *data;
115 unsigned long flags; 114 unsigned long flags;
diff --git a/kernel/trace/trace_sched_wakeup.c b/kernel/trace/trace_sched_wakeup.c
index 0271742abb8d..8052446ceeaa 100644
--- a/kernel/trace/trace_sched_wakeup.c
+++ b/kernel/trace/trace_sched_wakeup.c
@@ -107,8 +107,7 @@ static void probe_wakeup_migrate_task(struct task_struct *task, int cpu)
107} 107}
108 108
109static void notrace 109static void notrace
110probe_wakeup_sched_switch(struct rq *rq, struct task_struct *prev, 110probe_wakeup_sched_switch(struct task_struct *prev, struct task_struct *next)
111 struct task_struct *next)
112{ 111{
113 struct trace_array_cpu *data; 112 struct trace_array_cpu *data;
114 cycle_t T0, T1, delta; 113 cycle_t T0, T1, delta;
@@ -200,7 +199,7 @@ static void wakeup_reset(struct trace_array *tr)
200} 199}
201 200
202static void 201static void
203probe_wakeup(struct rq *rq, struct task_struct *p, int success) 202probe_wakeup(struct task_struct *p, int success)
204{ 203{
205 struct trace_array_cpu *data; 204 struct trace_array_cpu *data;
206 int cpu = smp_processor_id(); 205 int cpu = smp_processor_id();
diff --git a/kernel/trace/trace_selftest.c b/kernel/trace/trace_selftest.c
index 81003b4d617f..250e7f9bd2f0 100644
--- a/kernel/trace/trace_selftest.c
+++ b/kernel/trace/trace_selftest.c
@@ -17,7 +17,6 @@ static inline int trace_valid_entry(struct trace_entry *entry)
17 case TRACE_BRANCH: 17 case TRACE_BRANCH:
18 case TRACE_GRAPH_ENT: 18 case TRACE_GRAPH_ENT:
19 case TRACE_GRAPH_RET: 19 case TRACE_GRAPH_RET:
20 case TRACE_HW_BRANCHES:
21 case TRACE_KSYM: 20 case TRACE_KSYM:
22 return 1; 21 return 1;
23 } 22 }
@@ -30,7 +29,7 @@ static int trace_test_buffer_cpu(struct trace_array *tr, int cpu)
30 struct trace_entry *entry; 29 struct trace_entry *entry;
31 unsigned int loops = 0; 30 unsigned int loops = 0;
32 31
33 while ((event = ring_buffer_consume(tr->buffer, cpu, NULL))) { 32 while ((event = ring_buffer_consume(tr->buffer, cpu, NULL, NULL))) {
34 entry = ring_buffer_event_data(event); 33 entry = ring_buffer_event_data(event);
35 34
36 /* 35 /*
@@ -256,7 +255,8 @@ trace_selftest_startup_function(struct tracer *trace, struct trace_array *tr)
256/* Maximum number of functions to trace before diagnosing a hang */ 255/* Maximum number of functions to trace before diagnosing a hang */
257#define GRAPH_MAX_FUNC_TEST 100000000 256#define GRAPH_MAX_FUNC_TEST 100000000
258 257
259static void __ftrace_dump(bool disable_tracing); 258static void
259__ftrace_dump(bool disable_tracing, enum ftrace_dump_mode oops_dump_mode);
260static unsigned int graph_hang_thresh; 260static unsigned int graph_hang_thresh;
261 261
262/* Wrap the real function entry probe to avoid possible hanging */ 262/* Wrap the real function entry probe to avoid possible hanging */
@@ -267,7 +267,7 @@ static int trace_graph_entry_watchdog(struct ftrace_graph_ent *trace)
267 ftrace_graph_stop(); 267 ftrace_graph_stop();
268 printk(KERN_WARNING "BUG: Function graph tracer hang!\n"); 268 printk(KERN_WARNING "BUG: Function graph tracer hang!\n");
269 if (ftrace_dump_on_oops) 269 if (ftrace_dump_on_oops)
270 __ftrace_dump(false); 270 __ftrace_dump(false, DUMP_ALL);
271 return 0; 271 return 0;
272 } 272 }
273 273
@@ -755,62 +755,6 @@ trace_selftest_startup_branch(struct tracer *trace, struct trace_array *tr)
755} 755}
756#endif /* CONFIG_BRANCH_TRACER */ 756#endif /* CONFIG_BRANCH_TRACER */
757 757
758#ifdef CONFIG_HW_BRANCH_TRACER
759int
760trace_selftest_startup_hw_branches(struct tracer *trace,
761 struct trace_array *tr)
762{
763 struct trace_iterator *iter;
764 struct tracer tracer;
765 unsigned long count;
766 int ret;
767
768 if (!trace->open) {
769 printk(KERN_CONT "missing open function...");
770 return -1;
771 }
772
773 ret = tracer_init(trace, tr);
774 if (ret) {
775 warn_failed_init_tracer(trace, ret);
776 return ret;
777 }
778
779 /*
780 * The hw-branch tracer needs to collect the trace from the various
781 * cpu trace buffers - before tracing is stopped.
782 */
783 iter = kzalloc(sizeof(*iter), GFP_KERNEL);
784 if (!iter)
785 return -ENOMEM;
786
787 memcpy(&tracer, trace, sizeof(tracer));
788
789 iter->trace = &tracer;
790 iter->tr = tr;
791 iter->pos = -1;
792 mutex_init(&iter->mutex);
793
794 trace->open(iter);
795
796 mutex_destroy(&iter->mutex);
797 kfree(iter);
798
799 tracing_stop();
800
801 ret = trace_test_buffer(tr, &count);
802 trace->reset(tr);
803 tracing_start();
804
805 if (!ret && !count) {
806 printk(KERN_CONT "no entries found..");
807 ret = -1;
808 }
809
810 return ret;
811}
812#endif /* CONFIG_HW_BRANCH_TRACER */
813
814#ifdef CONFIG_KSYM_TRACER 758#ifdef CONFIG_KSYM_TRACER
815static int ksym_selftest_dummy; 759static int ksym_selftest_dummy;
816 760
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-27 21:39:48 -0500