Merge branch 'tip/perf/urgent-3' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt/linux-2.6-trace into trace/tip/perf/urgent-4
Conflicts: kernel/trace/trace_events.c Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
This commit is contained in:
Steven Rostedt
Steven Rostedt
commit
d244b6bd41
5 changed files with 175 additions and 75 deletions
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@ -3846,6 +3846,9 @@ int ring_buffer_read_page(struct ring_buffer *buffer,
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rpos = reader->read;
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pos += size;
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if (rpos >= commit)
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break;
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event = rb_reader_event(cpu_buffer);
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size = rb_event_length(event);
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} while (len > size);
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@ -3463,6 +3463,7 @@ tracing_mark_write(struct file *filp, const char __user *ubuf,
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size_t cnt, loff_t *fpos)
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{
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char *buf;
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size_t written;
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if (tracing_disabled)
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return -EINVAL;
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@ -3484,11 +3485,15 @@ tracing_mark_write(struct file *filp, const char __user *ubuf,
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} else
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buf[cnt] = '\0';
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cnt = mark_printk("%s", buf);
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written = mark_printk("%s", buf);
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kfree(buf);
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*fpos += cnt;
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*fpos += written;
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return cnt;
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/* don't tell userspace we wrote more - it might confuse them */
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if (written > cnt)
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written = cnt;
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return written;
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}
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static int tracing_clock_show(struct seq_file *m, void *v)
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@ -598,88 +598,165 @@ out:
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return ret;
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}
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static void print_event_fields(struct trace_seq *s, struct list_head *head)
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enum {
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FORMAT_HEADER = 1,
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FORMAT_PRINTFMT = 2,
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};
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static void *f_next(struct seq_file *m, void *v, loff_t *pos)
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{
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struct ftrace_event_call *call = m->private;
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struct ftrace_event_field *field;
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struct list_head *head;
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list_for_each_entry_reverse(field, head, link) {
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/*
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* Smartly shows the array type(except dynamic array).
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* Normal:
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* field:TYPE VAR
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* If TYPE := TYPE[LEN], it is shown:
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* field:TYPE VAR[LEN]
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*/
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const char *array_descriptor = strchr(field->type, '[');
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(*pos)++;
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if (!strncmp(field->type, "__data_loc", 10))
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array_descriptor = NULL;
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switch ((unsigned long)v) {
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case FORMAT_HEADER:
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head = &ftrace_common_fields;
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if (!array_descriptor) {
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trace_seq_printf(s, "\tfield:%s %s;\toffset:%u;"
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"\tsize:%u;\tsigned:%d;\n",
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field->type, field->name, field->offset,
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field->size, !!field->is_signed);
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} else {
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trace_seq_printf(s, "\tfield:%.*s %s%s;\toffset:%u;"
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"\tsize:%u;\tsigned:%d;\n",
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(int)(array_descriptor - field->type),
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field->type, field->name,
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array_descriptor, field->offset,
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field->size, !!field->is_signed);
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}
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if (unlikely(list_empty(head)))
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return NULL;
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field = list_entry(head->prev, struct ftrace_event_field, link);
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return field;
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case FORMAT_PRINTFMT:
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/* all done */
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return NULL;
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}
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head = trace_get_fields(call);
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/*
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* To separate common fields from event fields, the
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* LSB is set on the first event field. Clear it in case.
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*/
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v = (void *)((unsigned long)v & ~1L);
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field = v;
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/*
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* If this is a common field, and at the end of the list, then
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* continue with main list.
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*/
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if (field->link.prev == &ftrace_common_fields) {
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if (unlikely(list_empty(head)))
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return NULL;
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field = list_entry(head->prev, struct ftrace_event_field, link);
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/* Set the LSB to notify f_show to print an extra newline */
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field = (struct ftrace_event_field *)
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((unsigned long)field | 1);
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return field;
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}
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/* If we are done tell f_show to print the format */
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if (field->link.prev == head)
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return (void *)FORMAT_PRINTFMT;
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field = list_entry(field->link.prev, struct ftrace_event_field, link);
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return field;
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}
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static ssize_t
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event_format_read(struct file *filp, char __user *ubuf, size_t cnt,
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loff_t *ppos)
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static void *f_start(struct seq_file *m, loff_t *pos)
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{
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struct ftrace_event_call *call = filp->private_data;
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struct list_head *head;
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struct trace_seq *s;
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char *buf;
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int r;
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loff_t l = 0;
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void *p;
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if (*ppos)
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/* Start by showing the header */
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if (!*pos)
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return (void *)FORMAT_HEADER;
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p = (void *)FORMAT_HEADER;
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do {
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p = f_next(m, p, &l);
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} while (p && l < *pos);
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return p;
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}
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static int f_show(struct seq_file *m, void *v)
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{
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struct ftrace_event_call *call = m->private;
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struct ftrace_event_field *field;
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const char *array_descriptor;
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switch ((unsigned long)v) {
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case FORMAT_HEADER:
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seq_printf(m, "name: %s\n", call->name);
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seq_printf(m, "ID: %d\n", call->event.type);
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seq_printf(m, "format:\n");
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return 0;
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s = kmalloc(sizeof(*s), GFP_KERNEL);
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if (!s)
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return -ENOMEM;
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trace_seq_init(s);
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trace_seq_printf(s, "name: %s\n", call->name);
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trace_seq_printf(s, "ID: %d\n", call->event.type);
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trace_seq_printf(s, "format:\n");
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/* print common fields */
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print_event_fields(s, &ftrace_common_fields);
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trace_seq_putc(s, '\n');
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/* print event specific fields */
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head = trace_get_fields(call);
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print_event_fields(s, head);
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r = trace_seq_printf(s, "\nprint fmt: %s\n", call->print_fmt);
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if (!r) {
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/*
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* ug! The format output is bigger than a PAGE!!
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*/
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buf = "FORMAT TOO BIG\n";
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r = simple_read_from_buffer(ubuf, cnt, ppos,
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buf, strlen(buf));
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goto out;
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case FORMAT_PRINTFMT:
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seq_printf(m, "\nprint fmt: %s\n",
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call->print_fmt);
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return 0;
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}
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r = simple_read_from_buffer(ubuf, cnt, ppos,
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s->buffer, s->len);
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out:
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kfree(s);
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return r;
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/*
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* To separate common fields from event fields, the
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* LSB is set on the first event field. Clear it and
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* print a newline if it is set.
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*/
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if ((unsigned long)v & 1) {
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seq_putc(m, '\n');
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v = (void *)((unsigned long)v & ~1L);
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}
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field = v;
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/*
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* Smartly shows the array type(except dynamic array).
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* Normal:
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* field:TYPE VAR
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* If TYPE := TYPE[LEN], it is shown:
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* field:TYPE VAR[LEN]
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*/
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array_descriptor = strchr(field->type, '[');
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if (!strncmp(field->type, "__data_loc", 10))
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array_descriptor = NULL;
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if (!array_descriptor)
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seq_printf(m, "\tfield:%s %s;\toffset:%u;\tsize:%u;\tsigned:%d;\n",
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field->type, field->name, field->offset,
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field->size, !!field->is_signed);
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else
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seq_printf(m, "\tfield:%.*s %s%s;\toffset:%u;\tsize:%u;\tsigned:%d;\n",
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(int)(array_descriptor - field->type),
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field->type, field->name,
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array_descriptor, field->offset,
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field->size, !!field->is_signed);
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return 0;
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}
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static void f_stop(struct seq_file *m, void *p)
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{
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}
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static const struct seq_operations trace_format_seq_ops = {
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.start = f_start,
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.next = f_next,
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.stop = f_stop,
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.show = f_show,
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};
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static int trace_format_open(struct inode *inode, struct file *file)
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{
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struct ftrace_event_call *call = inode->i_private;
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struct seq_file *m;
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int ret;
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ret = seq_open(file, &trace_format_seq_ops);
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if (ret < 0)
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return ret;
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m = file->private_data;
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m->private = call;
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return 0;
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}
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static ssize_t
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@ -877,8 +954,10 @@ static const struct file_operations ftrace_enable_fops = {
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};
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static const struct file_operations ftrace_event_format_fops = {
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.open = tracing_open_generic,
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.read = event_format_read,
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.open = trace_format_open,
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.read = seq_read,
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.llseek = seq_lseek,
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.release = seq_release,
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};
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static const struct file_operations ftrace_event_id_fops = {
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@ -507,7 +507,15 @@ get_return_for_leaf(struct trace_iterator *iter,
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* if the output fails.
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*/
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data->ent = *curr;
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data->ret = *next;
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/*
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* If the next event is not a return type, then
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* we only care about what type it is. Otherwise we can
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* safely copy the entire event.
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*/
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if (next->ent.type == TRACE_GRAPH_RET)
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data->ret = *next;
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else
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data->ret.ent.type = next->ent.type;
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}
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}
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@ -159,6 +159,7 @@ my $section_regex; # Find the start of a section
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my $function_regex; # Find the name of a function
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# (return offset and func name)
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my $mcount_regex; # Find the call site to mcount (return offset)
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my $mcount_adjust; # Address adjustment to mcount offset
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my $alignment; # The .align value to use for $mcount_section
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my $section_type; # Section header plus possible alignment command
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my $can_use_local = 0; # If we can use local function references
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@ -213,6 +214,7 @@ $section_regex = "Disassembly of section\\s+(\\S+):";
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$function_regex = "^([0-9a-fA-F]+)\\s+<(.*?)>:";
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$mcount_regex = "^\\s*([0-9a-fA-F]+):.*\\smcount\$";
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$section_type = '@progbits';
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$mcount_adjust = 0;
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$type = ".long";
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if ($arch eq "x86_64") {
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@ -351,6 +353,9 @@ if ($arch eq "x86_64") {
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} elsif ($arch eq "microblaze") {
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# Microblaze calls '_mcount' instead of plain 'mcount'.
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$mcount_regex = "^\\s*([0-9a-fA-F]+):.*\\s_mcount\$";
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} elsif ($arch eq "blackfin") {
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$mcount_regex = "^\\s*([0-9a-fA-F]+):.*\\s__mcount\$";
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$mcount_adjust = -4;
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} else {
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die "Arch $arch is not supported with CONFIG_FTRACE_MCOUNT_RECORD";
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}
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@ -511,7 +516,7 @@ while (<IN>) {
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}
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# is this a call site to mcount? If so, record it to print later
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if ($text_found && /$mcount_regex/) {
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push(@offsets, hex $1);
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push(@offsets, (hex $1) + $mcount_adjust);
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}
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}
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