forked from luck/tmp_suning_uos_patched
f11b3f4e29
According to "events/ftrace/kernel_stack/format", output format of kernel stack should use "=>" instead of "<=". The second problem is that we shouldn't skip the first entry in the stack, although it seems to be duplicated when used in the "function" tracer, but events also use it. If we skip the first one, we will drop the topmost entry of the stack. The last problem is that if the last entry is ULONG_MAX(0xffffffff), we should drop it, otherwise it will print a NULL name line. before fix: sh-1072 [000] 26.957239: sched_process_fork: parent sh:1072 child sh:1073 sh-1072 [000] 26.957262: <= syscall_call <= sh-1072 [000] 26.957744: sched_switch: task sh:1072 [120] (R) ==> sh:1073 [120] sh-1072 [000] 26.957752: <= preempt_schedule <= wake_up_new_task <= do_fork <= sys_clone <= syscall_call <= After fix: sh-1075 [000] 39.791848: sched_process_fork: parent sh:1075 child sh:1076 sh-1075 [000] 39.791871: => sys_clone => syscall_call sh-1075 [000] 39.792713: sched_switch: task sh:1075 [120] (R) ==> sh:1076 [120] sh-1075 [000] 39.792722: => schedule => preempt_schedule => wake_up_new_task => do_fork => sys_clone => syscall_call Signed-off-by: walimis <walimisdev@gmail.com> LKML-Reference: <1244016090-7814-2-git-send-email-walimisdev@gmail.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
1162 lines
24 KiB
C
1162 lines
24 KiB
C
/*
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* trace_output.c
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*
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* Copyright (C) 2008 Red Hat Inc, Steven Rostedt <srostedt@redhat.com>
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*
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*/
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#include <linux/module.h>
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#include <linux/mutex.h>
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#include <linux/ftrace.h>
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#include "trace_output.h"
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/* must be a power of 2 */
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#define EVENT_HASHSIZE 128
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static DECLARE_RWSEM(trace_event_mutex);
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DEFINE_PER_CPU(struct trace_seq, ftrace_event_seq);
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EXPORT_PER_CPU_SYMBOL(ftrace_event_seq);
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static struct hlist_head event_hash[EVENT_HASHSIZE] __read_mostly;
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static int next_event_type = __TRACE_LAST_TYPE + 1;
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void trace_print_seq(struct seq_file *m, struct trace_seq *s)
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{
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int len = s->len >= PAGE_SIZE ? PAGE_SIZE - 1 : s->len;
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s->buffer[len] = 0;
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seq_puts(m, s->buffer);
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trace_seq_init(s);
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}
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enum print_line_t trace_print_bprintk_msg_only(struct trace_iterator *iter)
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{
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struct trace_seq *s = &iter->seq;
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struct trace_entry *entry = iter->ent;
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struct bprint_entry *field;
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int ret;
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trace_assign_type(field, entry);
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ret = trace_seq_bprintf(s, field->fmt, field->buf);
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if (!ret)
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return TRACE_TYPE_PARTIAL_LINE;
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return TRACE_TYPE_HANDLED;
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}
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enum print_line_t trace_print_printk_msg_only(struct trace_iterator *iter)
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{
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struct trace_seq *s = &iter->seq;
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struct trace_entry *entry = iter->ent;
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struct print_entry *field;
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int ret;
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trace_assign_type(field, entry);
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ret = trace_seq_printf(s, "%s", field->buf);
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if (!ret)
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return TRACE_TYPE_PARTIAL_LINE;
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return TRACE_TYPE_HANDLED;
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}
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/**
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* trace_seq_printf - sequence printing of trace information
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* @s: trace sequence descriptor
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* @fmt: printf format string
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*
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* The tracer may use either sequence operations or its own
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* copy to user routines. To simplify formating of a trace
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* trace_seq_printf is used to store strings into a special
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* buffer (@s). Then the output may be either used by
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* the sequencer or pulled into another buffer.
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*/
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int
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trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
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{
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int len = (PAGE_SIZE - 1) - s->len;
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va_list ap;
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int ret;
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if (!len)
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return 0;
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va_start(ap, fmt);
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ret = vsnprintf(s->buffer + s->len, len, fmt, ap);
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va_end(ap);
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/* If we can't write it all, don't bother writing anything */
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if (ret >= len)
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return 0;
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s->len += ret;
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return len;
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}
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EXPORT_SYMBOL_GPL(trace_seq_printf);
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int trace_seq_bprintf(struct trace_seq *s, const char *fmt, const u32 *binary)
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{
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int len = (PAGE_SIZE - 1) - s->len;
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int ret;
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if (!len)
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return 0;
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ret = bstr_printf(s->buffer + s->len, len, fmt, binary);
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/* If we can't write it all, don't bother writing anything */
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if (ret >= len)
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return 0;
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s->len += ret;
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return len;
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}
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/**
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* trace_seq_puts - trace sequence printing of simple string
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* @s: trace sequence descriptor
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* @str: simple string to record
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*
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* The tracer may use either the sequence operations or its own
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* copy to user routines. This function records a simple string
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* into a special buffer (@s) for later retrieval by a sequencer
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* or other mechanism.
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*/
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int trace_seq_puts(struct trace_seq *s, const char *str)
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{
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int len = strlen(str);
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if (len > ((PAGE_SIZE - 1) - s->len))
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return 0;
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memcpy(s->buffer + s->len, str, len);
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s->len += len;
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return len;
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}
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int trace_seq_putc(struct trace_seq *s, unsigned char c)
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{
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if (s->len >= (PAGE_SIZE - 1))
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return 0;
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s->buffer[s->len++] = c;
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return 1;
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}
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int trace_seq_putmem(struct trace_seq *s, const void *mem, size_t len)
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{
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if (len > ((PAGE_SIZE - 1) - s->len))
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return 0;
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memcpy(s->buffer + s->len, mem, len);
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s->len += len;
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return len;
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}
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int trace_seq_putmem_hex(struct trace_seq *s, const void *mem, size_t len)
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{
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unsigned char hex[HEX_CHARS];
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const unsigned char *data = mem;
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int i, j;
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#ifdef __BIG_ENDIAN
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for (i = 0, j = 0; i < len; i++) {
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#else
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for (i = len-1, j = 0; i >= 0; i--) {
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#endif
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hex[j++] = hex_asc_hi(data[i]);
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hex[j++] = hex_asc_lo(data[i]);
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}
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hex[j++] = ' ';
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return trace_seq_putmem(s, hex, j);
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}
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void *trace_seq_reserve(struct trace_seq *s, size_t len)
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{
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void *ret;
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if (len > ((PAGE_SIZE - 1) - s->len))
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return NULL;
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ret = s->buffer + s->len;
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s->len += len;
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return ret;
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}
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int trace_seq_path(struct trace_seq *s, struct path *path)
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{
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unsigned char *p;
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if (s->len >= (PAGE_SIZE - 1))
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return 0;
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p = d_path(path, s->buffer + s->len, PAGE_SIZE - s->len);
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if (!IS_ERR(p)) {
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p = mangle_path(s->buffer + s->len, p, "\n");
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if (p) {
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s->len = p - s->buffer;
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return 1;
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}
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} else {
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s->buffer[s->len++] = '?';
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return 1;
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}
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return 0;
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}
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const char *
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ftrace_print_flags_seq(struct trace_seq *p, const char *delim,
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unsigned long flags,
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const struct trace_print_flags *flag_array)
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{
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unsigned long mask;
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const char *str;
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int i;
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trace_seq_init(p);
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for (i = 0; flag_array[i].name && flags; i++) {
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mask = flag_array[i].mask;
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if ((flags & mask) != mask)
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continue;
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str = flag_array[i].name;
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flags &= ~mask;
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if (p->len && delim)
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trace_seq_puts(p, delim);
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trace_seq_puts(p, str);
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}
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/* check for left over flags */
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if (flags) {
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if (p->len && delim)
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trace_seq_puts(p, delim);
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trace_seq_printf(p, "0x%lx", flags);
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}
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trace_seq_putc(p, 0);
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return p->buffer;
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}
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EXPORT_SYMBOL(ftrace_print_flags_seq);
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const char *
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ftrace_print_symbols_seq(struct trace_seq *p, unsigned long val,
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const struct trace_print_flags *symbol_array)
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{
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int i;
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trace_seq_init(p);
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for (i = 0; symbol_array[i].name; i++) {
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if (val != symbol_array[i].mask)
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continue;
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trace_seq_puts(p, symbol_array[i].name);
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break;
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}
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if (!p->len)
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trace_seq_printf(p, "0x%lx", val);
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trace_seq_putc(p, 0);
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return p->buffer;
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}
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EXPORT_SYMBOL(ftrace_print_symbols_seq);
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#ifdef CONFIG_KRETPROBES
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static inline const char *kretprobed(const char *name)
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{
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static const char tramp_name[] = "kretprobe_trampoline";
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int size = sizeof(tramp_name);
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if (strncmp(tramp_name, name, size) == 0)
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return "[unknown/kretprobe'd]";
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return name;
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}
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#else
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static inline const char *kretprobed(const char *name)
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{
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return name;
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}
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#endif /* CONFIG_KRETPROBES */
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static int
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seq_print_sym_short(struct trace_seq *s, const char *fmt, unsigned long address)
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{
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#ifdef CONFIG_KALLSYMS
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char str[KSYM_SYMBOL_LEN];
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const char *name;
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kallsyms_lookup(address, NULL, NULL, NULL, str);
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name = kretprobed(str);
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return trace_seq_printf(s, fmt, name);
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#endif
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return 1;
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}
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static int
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seq_print_sym_offset(struct trace_seq *s, const char *fmt,
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unsigned long address)
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{
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#ifdef CONFIG_KALLSYMS
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char str[KSYM_SYMBOL_LEN];
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const char *name;
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sprint_symbol(str, address);
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name = kretprobed(str);
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return trace_seq_printf(s, fmt, name);
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#endif
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return 1;
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}
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#ifndef CONFIG_64BIT
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# define IP_FMT "%08lx"
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#else
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# define IP_FMT "%016lx"
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#endif
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int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm,
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unsigned long ip, unsigned long sym_flags)
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{
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struct file *file = NULL;
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unsigned long vmstart = 0;
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int ret = 1;
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if (mm) {
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const struct vm_area_struct *vma;
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down_read(&mm->mmap_sem);
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vma = find_vma(mm, ip);
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if (vma) {
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file = vma->vm_file;
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vmstart = vma->vm_start;
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}
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if (file) {
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ret = trace_seq_path(s, &file->f_path);
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if (ret)
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ret = trace_seq_printf(s, "[+0x%lx]",
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ip - vmstart);
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}
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up_read(&mm->mmap_sem);
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}
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if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file))
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ret = trace_seq_printf(s, " <" IP_FMT ">", ip);
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return ret;
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}
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int
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seq_print_userip_objs(const struct userstack_entry *entry, struct trace_seq *s,
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unsigned long sym_flags)
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{
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struct mm_struct *mm = NULL;
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int ret = 1;
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unsigned int i;
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if (trace_flags & TRACE_ITER_SYM_USEROBJ) {
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struct task_struct *task;
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/*
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* we do the lookup on the thread group leader,
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* since individual threads might have already quit!
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*/
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rcu_read_lock();
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task = find_task_by_vpid(entry->ent.tgid);
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if (task)
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mm = get_task_mm(task);
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rcu_read_unlock();
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}
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for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
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unsigned long ip = entry->caller[i];
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if (ip == ULONG_MAX || !ret)
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break;
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if (i && ret)
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ret = trace_seq_puts(s, " <- ");
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if (!ip) {
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if (ret)
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ret = trace_seq_puts(s, "??");
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continue;
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}
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if (!ret)
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break;
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if (ret)
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ret = seq_print_user_ip(s, mm, ip, sym_flags);
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}
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if (mm)
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mmput(mm);
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return ret;
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}
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int
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seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags)
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{
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int ret;
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if (!ip)
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return trace_seq_printf(s, "0");
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if (sym_flags & TRACE_ITER_SYM_OFFSET)
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ret = seq_print_sym_offset(s, "%s", ip);
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else
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ret = seq_print_sym_short(s, "%s", ip);
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if (!ret)
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return 0;
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if (sym_flags & TRACE_ITER_SYM_ADDR)
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ret = trace_seq_printf(s, " <" IP_FMT ">", ip);
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return ret;
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}
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static int
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lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu)
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{
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int hardirq, softirq;
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char comm[TASK_COMM_LEN];
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trace_find_cmdline(entry->pid, comm);
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hardirq = entry->flags & TRACE_FLAG_HARDIRQ;
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softirq = entry->flags & TRACE_FLAG_SOFTIRQ;
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if (!trace_seq_printf(s, "%8.8s-%-5d %3d%c%c%c",
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comm, entry->pid, cpu,
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(entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' :
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(entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ?
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'X' : '.',
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(entry->flags & TRACE_FLAG_NEED_RESCHED) ?
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'N' : '.',
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(hardirq && softirq) ? 'H' :
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hardirq ? 'h' : softirq ? 's' : '.'))
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return 0;
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if (entry->preempt_count)
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return trace_seq_printf(s, "%x", entry->preempt_count);
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return trace_seq_puts(s, ".");
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}
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static unsigned long preempt_mark_thresh = 100;
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static int
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lat_print_timestamp(struct trace_seq *s, u64 abs_usecs,
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unsigned long rel_usecs)
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{
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return trace_seq_printf(s, " %4lldus%c: ", abs_usecs,
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rel_usecs > preempt_mark_thresh ? '!' :
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rel_usecs > 1 ? '+' : ' ');
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}
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int trace_print_context(struct trace_iterator *iter)
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{
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struct trace_seq *s = &iter->seq;
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struct trace_entry *entry = iter->ent;
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unsigned long long t = ns2usecs(iter->ts);
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unsigned long usec_rem = do_div(t, USEC_PER_SEC);
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unsigned long secs = (unsigned long)t;
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char comm[TASK_COMM_LEN];
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trace_find_cmdline(entry->pid, comm);
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return trace_seq_printf(s, "%16s-%-5d [%03d] %5lu.%06lu: ",
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comm, entry->pid, iter->cpu, secs, usec_rem);
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}
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int trace_print_lat_context(struct trace_iterator *iter)
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{
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u64 next_ts;
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int ret;
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struct trace_seq *s = &iter->seq;
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struct trace_entry *entry = iter->ent,
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*next_entry = trace_find_next_entry(iter, NULL,
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&next_ts);
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unsigned long verbose = (trace_flags & TRACE_ITER_VERBOSE);
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unsigned long abs_usecs = ns2usecs(iter->ts - iter->tr->time_start);
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unsigned long rel_usecs;
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if (!next_entry)
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next_ts = iter->ts;
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rel_usecs = ns2usecs(next_ts - iter->ts);
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if (verbose) {
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char comm[TASK_COMM_LEN];
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trace_find_cmdline(entry->pid, comm);
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ret = trace_seq_printf(s, "%16s %5d %3d %d %08x %08lx [%08llx]"
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" %ld.%03ldms (+%ld.%03ldms): ", comm,
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entry->pid, iter->cpu, entry->flags,
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entry->preempt_count, iter->idx,
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ns2usecs(iter->ts),
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abs_usecs / USEC_PER_MSEC,
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abs_usecs % USEC_PER_MSEC,
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rel_usecs / USEC_PER_MSEC,
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rel_usecs % USEC_PER_MSEC);
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} else {
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ret = lat_print_generic(s, entry, iter->cpu);
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if (ret)
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ret = lat_print_timestamp(s, abs_usecs, rel_usecs);
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}
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return ret;
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}
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static const char state_to_char[] = TASK_STATE_TO_CHAR_STR;
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static int task_state_char(unsigned long state)
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{
|
|
int bit = state ? __ffs(state) + 1 : 0;
|
|
|
|
return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?';
|
|
}
|
|
|
|
/**
|
|
* ftrace_find_event - find a registered event
|
|
* @type: the type of event to look for
|
|
*
|
|
* Returns an event of type @type otherwise NULL
|
|
* Called with trace_event_read_lock() held.
|
|
*/
|
|
struct trace_event *ftrace_find_event(int type)
|
|
{
|
|
struct trace_event *event;
|
|
struct hlist_node *n;
|
|
unsigned key;
|
|
|
|
key = type & (EVENT_HASHSIZE - 1);
|
|
|
|
hlist_for_each_entry(event, n, &event_hash[key], node) {
|
|
if (event->type == type)
|
|
return event;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static LIST_HEAD(ftrace_event_list);
|
|
|
|
static int trace_search_list(struct list_head **list)
|
|
{
|
|
struct trace_event *e;
|
|
int last = __TRACE_LAST_TYPE;
|
|
|
|
if (list_empty(&ftrace_event_list)) {
|
|
*list = &ftrace_event_list;
|
|
return last + 1;
|
|
}
|
|
|
|
/*
|
|
* We used up all possible max events,
|
|
* lets see if somebody freed one.
|
|
*/
|
|
list_for_each_entry(e, &ftrace_event_list, list) {
|
|
if (e->type != last + 1)
|
|
break;
|
|
last++;
|
|
}
|
|
|
|
/* Did we used up all 65 thousand events??? */
|
|
if ((last + 1) > FTRACE_MAX_EVENT)
|
|
return 0;
|
|
|
|
*list = &e->list;
|
|
return last + 1;
|
|
}
|
|
|
|
void trace_event_read_lock(void)
|
|
{
|
|
down_read(&trace_event_mutex);
|
|
}
|
|
|
|
void trace_event_read_unlock(void)
|
|
{
|
|
up_read(&trace_event_mutex);
|
|
}
|
|
|
|
/**
|
|
* register_ftrace_event - register output for an event type
|
|
* @event: the event type to register
|
|
*
|
|
* Event types are stored in a hash and this hash is used to
|
|
* find a way to print an event. If the @event->type is set
|
|
* then it will use that type, otherwise it will assign a
|
|
* type to use.
|
|
*
|
|
* If you assign your own type, please make sure it is added
|
|
* to the trace_type enum in trace.h, to avoid collisions
|
|
* with the dynamic types.
|
|
*
|
|
* Returns the event type number or zero on error.
|
|
*/
|
|
int register_ftrace_event(struct trace_event *event)
|
|
{
|
|
unsigned key;
|
|
int ret = 0;
|
|
|
|
down_write(&trace_event_mutex);
|
|
|
|
if (WARN_ON(!event))
|
|
goto out;
|
|
|
|
INIT_LIST_HEAD(&event->list);
|
|
|
|
if (!event->type) {
|
|
struct list_head *list = NULL;
|
|
|
|
if (next_event_type > FTRACE_MAX_EVENT) {
|
|
|
|
event->type = trace_search_list(&list);
|
|
if (!event->type)
|
|
goto out;
|
|
|
|
} else {
|
|
|
|
event->type = next_event_type++;
|
|
list = &ftrace_event_list;
|
|
}
|
|
|
|
if (WARN_ON(ftrace_find_event(event->type)))
|
|
goto out;
|
|
|
|
list_add_tail(&event->list, list);
|
|
|
|
} else if (event->type > __TRACE_LAST_TYPE) {
|
|
printk(KERN_WARNING "Need to add type to trace.h\n");
|
|
WARN_ON(1);
|
|
goto out;
|
|
} else {
|
|
/* Is this event already used */
|
|
if (ftrace_find_event(event->type))
|
|
goto out;
|
|
}
|
|
|
|
if (event->trace == NULL)
|
|
event->trace = trace_nop_print;
|
|
if (event->raw == NULL)
|
|
event->raw = trace_nop_print;
|
|
if (event->hex == NULL)
|
|
event->hex = trace_nop_print;
|
|
if (event->binary == NULL)
|
|
event->binary = trace_nop_print;
|
|
|
|
key = event->type & (EVENT_HASHSIZE - 1);
|
|
|
|
hlist_add_head(&event->node, &event_hash[key]);
|
|
|
|
ret = event->type;
|
|
out:
|
|
up_write(&trace_event_mutex);
|
|
|
|
return ret;
|
|
}
|
|
EXPORT_SYMBOL_GPL(register_ftrace_event);
|
|
|
|
/**
|
|
* unregister_ftrace_event - remove a no longer used event
|
|
* @event: the event to remove
|
|
*/
|
|
int unregister_ftrace_event(struct trace_event *event)
|
|
{
|
|
down_write(&trace_event_mutex);
|
|
hlist_del(&event->node);
|
|
list_del(&event->list);
|
|
up_write(&trace_event_mutex);
|
|
|
|
return 0;
|
|
}
|
|
EXPORT_SYMBOL_GPL(unregister_ftrace_event);
|
|
|
|
/*
|
|
* Standard events
|
|
*/
|
|
|
|
enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags)
|
|
{
|
|
return TRACE_TYPE_HANDLED;
|
|
}
|
|
|
|
/* TRACE_FN */
|
|
static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags)
|
|
{
|
|
struct ftrace_entry *field;
|
|
struct trace_seq *s = &iter->seq;
|
|
|
|
trace_assign_type(field, iter->ent);
|
|
|
|
if (!seq_print_ip_sym(s, field->ip, flags))
|
|
goto partial;
|
|
|
|
if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) {
|
|
if (!trace_seq_printf(s, " <-"))
|
|
goto partial;
|
|
if (!seq_print_ip_sym(s,
|
|
field->parent_ip,
|
|
flags))
|
|
goto partial;
|
|
}
|
|
if (!trace_seq_printf(s, "\n"))
|
|
goto partial;
|
|
|
|
return TRACE_TYPE_HANDLED;
|
|
|
|
partial:
|
|
return TRACE_TYPE_PARTIAL_LINE;
|
|
}
|
|
|
|
static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags)
|
|
{
|
|
struct ftrace_entry *field;
|
|
|
|
trace_assign_type(field, iter->ent);
|
|
|
|
if (!trace_seq_printf(&iter->seq, "%lx %lx\n",
|
|
field->ip,
|
|
field->parent_ip))
|
|
return TRACE_TYPE_PARTIAL_LINE;
|
|
|
|
return TRACE_TYPE_HANDLED;
|
|
}
|
|
|
|
static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags)
|
|
{
|
|
struct ftrace_entry *field;
|
|
struct trace_seq *s = &iter->seq;
|
|
|
|
trace_assign_type(field, iter->ent);
|
|
|
|
SEQ_PUT_HEX_FIELD_RET(s, field->ip);
|
|
SEQ_PUT_HEX_FIELD_RET(s, field->parent_ip);
|
|
|
|
return TRACE_TYPE_HANDLED;
|
|
}
|
|
|
|
static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags)
|
|
{
|
|
struct ftrace_entry *field;
|
|
struct trace_seq *s = &iter->seq;
|
|
|
|
trace_assign_type(field, iter->ent);
|
|
|
|
SEQ_PUT_FIELD_RET(s, field->ip);
|
|
SEQ_PUT_FIELD_RET(s, field->parent_ip);
|
|
|
|
return TRACE_TYPE_HANDLED;
|
|
}
|
|
|
|
static struct trace_event trace_fn_event = {
|
|
.type = TRACE_FN,
|
|
.trace = trace_fn_trace,
|
|
.raw = trace_fn_raw,
|
|
.hex = trace_fn_hex,
|
|
.binary = trace_fn_bin,
|
|
};
|
|
|
|
/* TRACE_CTX an TRACE_WAKE */
|
|
static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter,
|
|
char *delim)
|
|
{
|
|
struct ctx_switch_entry *field;
|
|
char comm[TASK_COMM_LEN];
|
|
int S, T;
|
|
|
|
|
|
trace_assign_type(field, iter->ent);
|
|
|
|
T = task_state_char(field->next_state);
|
|
S = task_state_char(field->prev_state);
|
|
trace_find_cmdline(field->next_pid, comm);
|
|
if (!trace_seq_printf(&iter->seq,
|
|
" %5d:%3d:%c %s [%03d] %5d:%3d:%c %s\n",
|
|
field->prev_pid,
|
|
field->prev_prio,
|
|
S, delim,
|
|
field->next_cpu,
|
|
field->next_pid,
|
|
field->next_prio,
|
|
T, comm))
|
|
return TRACE_TYPE_PARTIAL_LINE;
|
|
|
|
return TRACE_TYPE_HANDLED;
|
|
}
|
|
|
|
static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags)
|
|
{
|
|
return trace_ctxwake_print(iter, "==>");
|
|
}
|
|
|
|
static enum print_line_t trace_wake_print(struct trace_iterator *iter,
|
|
int flags)
|
|
{
|
|
return trace_ctxwake_print(iter, " +");
|
|
}
|
|
|
|
static int trace_ctxwake_raw(struct trace_iterator *iter, char S)
|
|
{
|
|
struct ctx_switch_entry *field;
|
|
int T;
|
|
|
|
trace_assign_type(field, iter->ent);
|
|
|
|
if (!S)
|
|
task_state_char(field->prev_state);
|
|
T = task_state_char(field->next_state);
|
|
if (!trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c\n",
|
|
field->prev_pid,
|
|
field->prev_prio,
|
|
S,
|
|
field->next_cpu,
|
|
field->next_pid,
|
|
field->next_prio,
|
|
T))
|
|
return TRACE_TYPE_PARTIAL_LINE;
|
|
|
|
return TRACE_TYPE_HANDLED;
|
|
}
|
|
|
|
static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags)
|
|
{
|
|
return trace_ctxwake_raw(iter, 0);
|
|
}
|
|
|
|
static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags)
|
|
{
|
|
return trace_ctxwake_raw(iter, '+');
|
|
}
|
|
|
|
|
|
static int trace_ctxwake_hex(struct trace_iterator *iter, char S)
|
|
{
|
|
struct ctx_switch_entry *field;
|
|
struct trace_seq *s = &iter->seq;
|
|
int T;
|
|
|
|
trace_assign_type(field, iter->ent);
|
|
|
|
if (!S)
|
|
task_state_char(field->prev_state);
|
|
T = task_state_char(field->next_state);
|
|
|
|
SEQ_PUT_HEX_FIELD_RET(s, field->prev_pid);
|
|
SEQ_PUT_HEX_FIELD_RET(s, field->prev_prio);
|
|
SEQ_PUT_HEX_FIELD_RET(s, S);
|
|
SEQ_PUT_HEX_FIELD_RET(s, field->next_cpu);
|
|
SEQ_PUT_HEX_FIELD_RET(s, field->next_pid);
|
|
SEQ_PUT_HEX_FIELD_RET(s, field->next_prio);
|
|
SEQ_PUT_HEX_FIELD_RET(s, T);
|
|
|
|
return TRACE_TYPE_HANDLED;
|
|
}
|
|
|
|
static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags)
|
|
{
|
|
return trace_ctxwake_hex(iter, 0);
|
|
}
|
|
|
|
static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags)
|
|
{
|
|
return trace_ctxwake_hex(iter, '+');
|
|
}
|
|
|
|
static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter,
|
|
int flags)
|
|
{
|
|
struct ctx_switch_entry *field;
|
|
struct trace_seq *s = &iter->seq;
|
|
|
|
trace_assign_type(field, iter->ent);
|
|
|
|
SEQ_PUT_FIELD_RET(s, field->prev_pid);
|
|
SEQ_PUT_FIELD_RET(s, field->prev_prio);
|
|
SEQ_PUT_FIELD_RET(s, field->prev_state);
|
|
SEQ_PUT_FIELD_RET(s, field->next_pid);
|
|
SEQ_PUT_FIELD_RET(s, field->next_prio);
|
|
SEQ_PUT_FIELD_RET(s, field->next_state);
|
|
|
|
return TRACE_TYPE_HANDLED;
|
|
}
|
|
|
|
static struct trace_event trace_ctx_event = {
|
|
.type = TRACE_CTX,
|
|
.trace = trace_ctx_print,
|
|
.raw = trace_ctx_raw,
|
|
.hex = trace_ctx_hex,
|
|
.binary = trace_ctxwake_bin,
|
|
};
|
|
|
|
static struct trace_event trace_wake_event = {
|
|
.type = TRACE_WAKE,
|
|
.trace = trace_wake_print,
|
|
.raw = trace_wake_raw,
|
|
.hex = trace_wake_hex,
|
|
.binary = trace_ctxwake_bin,
|
|
};
|
|
|
|
/* TRACE_SPECIAL */
|
|
static enum print_line_t trace_special_print(struct trace_iterator *iter,
|
|
int flags)
|
|
{
|
|
struct special_entry *field;
|
|
|
|
trace_assign_type(field, iter->ent);
|
|
|
|
if (!trace_seq_printf(&iter->seq, "# %ld %ld %ld\n",
|
|
field->arg1,
|
|
field->arg2,
|
|
field->arg3))
|
|
return TRACE_TYPE_PARTIAL_LINE;
|
|
|
|
return TRACE_TYPE_HANDLED;
|
|
}
|
|
|
|
static enum print_line_t trace_special_hex(struct trace_iterator *iter,
|
|
int flags)
|
|
{
|
|
struct special_entry *field;
|
|
struct trace_seq *s = &iter->seq;
|
|
|
|
trace_assign_type(field, iter->ent);
|
|
|
|
SEQ_PUT_HEX_FIELD_RET(s, field->arg1);
|
|
SEQ_PUT_HEX_FIELD_RET(s, field->arg2);
|
|
SEQ_PUT_HEX_FIELD_RET(s, field->arg3);
|
|
|
|
return TRACE_TYPE_HANDLED;
|
|
}
|
|
|
|
static enum print_line_t trace_special_bin(struct trace_iterator *iter,
|
|
int flags)
|
|
{
|
|
struct special_entry *field;
|
|
struct trace_seq *s = &iter->seq;
|
|
|
|
trace_assign_type(field, iter->ent);
|
|
|
|
SEQ_PUT_FIELD_RET(s, field->arg1);
|
|
SEQ_PUT_FIELD_RET(s, field->arg2);
|
|
SEQ_PUT_FIELD_RET(s, field->arg3);
|
|
|
|
return TRACE_TYPE_HANDLED;
|
|
}
|
|
|
|
static struct trace_event trace_special_event = {
|
|
.type = TRACE_SPECIAL,
|
|
.trace = trace_special_print,
|
|
.raw = trace_special_print,
|
|
.hex = trace_special_hex,
|
|
.binary = trace_special_bin,
|
|
};
|
|
|
|
/* TRACE_STACK */
|
|
|
|
static enum print_line_t trace_stack_print(struct trace_iterator *iter,
|
|
int flags)
|
|
{
|
|
struct stack_entry *field;
|
|
struct trace_seq *s = &iter->seq;
|
|
int i;
|
|
|
|
trace_assign_type(field, iter->ent);
|
|
|
|
if (!trace_seq_puts(s, "\n"))
|
|
goto partial;
|
|
for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
|
|
if (!field->caller[i] || (field->caller[i] == ULONG_MAX))
|
|
break;
|
|
if (!trace_seq_puts(s, " => "))
|
|
goto partial;
|
|
|
|
if (!seq_print_ip_sym(s, field->caller[i], flags))
|
|
goto partial;
|
|
if (!trace_seq_puts(s, "\n"))
|
|
goto partial;
|
|
}
|
|
|
|
return TRACE_TYPE_HANDLED;
|
|
|
|
partial:
|
|
return TRACE_TYPE_PARTIAL_LINE;
|
|
}
|
|
|
|
static struct trace_event trace_stack_event = {
|
|
.type = TRACE_STACK,
|
|
.trace = trace_stack_print,
|
|
.raw = trace_special_print,
|
|
.hex = trace_special_hex,
|
|
.binary = trace_special_bin,
|
|
};
|
|
|
|
/* TRACE_USER_STACK */
|
|
static enum print_line_t trace_user_stack_print(struct trace_iterator *iter,
|
|
int flags)
|
|
{
|
|
struct userstack_entry *field;
|
|
struct trace_seq *s = &iter->seq;
|
|
|
|
trace_assign_type(field, iter->ent);
|
|
|
|
if (!seq_print_userip_objs(field, s, flags))
|
|
goto partial;
|
|
|
|
if (!trace_seq_putc(s, '\n'))
|
|
goto partial;
|
|
|
|
return TRACE_TYPE_HANDLED;
|
|
|
|
partial:
|
|
return TRACE_TYPE_PARTIAL_LINE;
|
|
}
|
|
|
|
static struct trace_event trace_user_stack_event = {
|
|
.type = TRACE_USER_STACK,
|
|
.trace = trace_user_stack_print,
|
|
.raw = trace_special_print,
|
|
.hex = trace_special_hex,
|
|
.binary = trace_special_bin,
|
|
};
|
|
|
|
/* TRACE_BPRINT */
|
|
static enum print_line_t
|
|
trace_bprint_print(struct trace_iterator *iter, int flags)
|
|
{
|
|
struct trace_entry *entry = iter->ent;
|
|
struct trace_seq *s = &iter->seq;
|
|
struct bprint_entry *field;
|
|
|
|
trace_assign_type(field, entry);
|
|
|
|
if (!seq_print_ip_sym(s, field->ip, flags))
|
|
goto partial;
|
|
|
|
if (!trace_seq_puts(s, ": "))
|
|
goto partial;
|
|
|
|
if (!trace_seq_bprintf(s, field->fmt, field->buf))
|
|
goto partial;
|
|
|
|
return TRACE_TYPE_HANDLED;
|
|
|
|
partial:
|
|
return TRACE_TYPE_PARTIAL_LINE;
|
|
}
|
|
|
|
|
|
static enum print_line_t
|
|
trace_bprint_raw(struct trace_iterator *iter, int flags)
|
|
{
|
|
struct bprint_entry *field;
|
|
struct trace_seq *s = &iter->seq;
|
|
|
|
trace_assign_type(field, iter->ent);
|
|
|
|
if (!trace_seq_printf(s, ": %lx : ", field->ip))
|
|
goto partial;
|
|
|
|
if (!trace_seq_bprintf(s, field->fmt, field->buf))
|
|
goto partial;
|
|
|
|
return TRACE_TYPE_HANDLED;
|
|
|
|
partial:
|
|
return TRACE_TYPE_PARTIAL_LINE;
|
|
}
|
|
|
|
|
|
static struct trace_event trace_bprint_event = {
|
|
.type = TRACE_BPRINT,
|
|
.trace = trace_bprint_print,
|
|
.raw = trace_bprint_raw,
|
|
};
|
|
|
|
/* TRACE_PRINT */
|
|
static enum print_line_t trace_print_print(struct trace_iterator *iter,
|
|
int flags)
|
|
{
|
|
struct print_entry *field;
|
|
struct trace_seq *s = &iter->seq;
|
|
|
|
trace_assign_type(field, iter->ent);
|
|
|
|
if (!seq_print_ip_sym(s, field->ip, flags))
|
|
goto partial;
|
|
|
|
if (!trace_seq_printf(s, ": %s", field->buf))
|
|
goto partial;
|
|
|
|
return TRACE_TYPE_HANDLED;
|
|
|
|
partial:
|
|
return TRACE_TYPE_PARTIAL_LINE;
|
|
}
|
|
|
|
static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags)
|
|
{
|
|
struct print_entry *field;
|
|
|
|
trace_assign_type(field, iter->ent);
|
|
|
|
if (!trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf))
|
|
goto partial;
|
|
|
|
return TRACE_TYPE_HANDLED;
|
|
|
|
partial:
|
|
return TRACE_TYPE_PARTIAL_LINE;
|
|
}
|
|
|
|
static struct trace_event trace_print_event = {
|
|
.type = TRACE_PRINT,
|
|
.trace = trace_print_print,
|
|
.raw = trace_print_raw,
|
|
};
|
|
|
|
|
|
static struct trace_event *events[] __initdata = {
|
|
&trace_fn_event,
|
|
&trace_ctx_event,
|
|
&trace_wake_event,
|
|
&trace_special_event,
|
|
&trace_stack_event,
|
|
&trace_user_stack_event,
|
|
&trace_bprint_event,
|
|
&trace_print_event,
|
|
NULL
|
|
};
|
|
|
|
__init static int init_events(void)
|
|
{
|
|
struct trace_event *event;
|
|
int i, ret;
|
|
|
|
for (i = 0; events[i]; i++) {
|
|
event = events[i];
|
|
|
|
ret = register_ftrace_event(event);
|
|
if (!ret) {
|
|
printk(KERN_WARNING "event %d failed to register\n",
|
|
event->type);
|
|
WARN_ON_ONCE(1);
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
device_initcall(init_events);
|