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kernel/trace/trace_output.c
27.1 KB
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/* * trace_output.c * * Copyright (C) 2008 Red Hat Inc, Steven Rostedt <srostedt@redhat.com> * */ #include <linux/module.h> #include <linux/mutex.h> #include <linux/ftrace.h> #include "trace_output.h" /* must be a power of 2 */ #define EVENT_HASHSIZE 128 |
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DECLARE_RWSEM(trace_event_sem); |
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static struct hlist_head event_hash[EVENT_HASHSIZE] __read_mostly; static int next_event_type = __TRACE_LAST_TYPE + 1; |
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enum print_line_t trace_print_bputs_msg_only(struct trace_iterator *iter) { struct trace_seq *s = &iter->seq; struct trace_entry *entry = iter->ent; struct bputs_entry *field; |
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trace_assign_type(field, entry); |
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trace_seq_puts(s, field->str); |
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return trace_handle_return(s); |
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} |
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enum print_line_t trace_print_bprintk_msg_only(struct trace_iterator *iter) { struct trace_seq *s = &iter->seq; struct trace_entry *entry = iter->ent; struct bprint_entry *field; |
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trace_assign_type(field, entry); |
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trace_seq_bprintf(s, field->fmt, field->buf); |
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return trace_handle_return(s); |
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} enum print_line_t trace_print_printk_msg_only(struct trace_iterator *iter) { struct trace_seq *s = &iter->seq; struct trace_entry *entry = iter->ent; struct print_entry *field; |
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trace_assign_type(field, entry); |
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trace_seq_puts(s, field->buf); |
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return trace_handle_return(s); |
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} |
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const char * |
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trace_print_flags_seq(struct trace_seq *p, const char *delim, unsigned long flags, const struct trace_print_flags *flag_array) |
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{ unsigned long mask; const char *str; |
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const char *ret = trace_seq_buffer_ptr(p); |
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int i, first = 1; |
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for (i = 0; flag_array[i].name && flags; i++) { mask = flag_array[i].mask; if ((flags & mask) != mask) continue; str = flag_array[i].name; flags &= ~mask; |
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if (!first && delim) |
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trace_seq_puts(p, delim); |
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else first = 0; |
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trace_seq_puts(p, str); } /* check for left over flags */ if (flags) { |
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if (!first && delim) |
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trace_seq_puts(p, delim); trace_seq_printf(p, "0x%lx", flags); } trace_seq_putc(p, 0); |
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return ret; |
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} |
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EXPORT_SYMBOL(trace_print_flags_seq); |
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const char * |
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trace_print_symbols_seq(struct trace_seq *p, unsigned long val, const struct trace_print_flags *symbol_array) |
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{ int i; |
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const char *ret = trace_seq_buffer_ptr(p); |
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for (i = 0; symbol_array[i].name; i++) { if (val != symbol_array[i].mask) continue; trace_seq_puts(p, symbol_array[i].name); break; } |
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if (ret == (const char *)(trace_seq_buffer_ptr(p))) |
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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 ret; |
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} |
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EXPORT_SYMBOL(trace_print_symbols_seq); |
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#if BITS_PER_LONG == 32 const char * |
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trace_print_symbols_seq_u64(struct trace_seq *p, unsigned long long val, |
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const struct trace_print_flags_u64 *symbol_array) { int i; |
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const char *ret = trace_seq_buffer_ptr(p); |
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for (i = 0; symbol_array[i].name; i++) { if (val != symbol_array[i].mask) continue; trace_seq_puts(p, symbol_array[i].name); break; } |
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if (ret == (const char *)(trace_seq_buffer_ptr(p))) |
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trace_seq_printf(p, "0x%llx", val); trace_seq_putc(p, 0); return ret; } |
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EXPORT_SYMBOL(trace_print_symbols_seq_u64); |
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#endif |
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const char * |
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trace_print_bitmask_seq(struct trace_seq *p, void *bitmask_ptr, unsigned int bitmask_size) |
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{ |
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const char *ret = trace_seq_buffer_ptr(p); |
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trace_seq_bitmask(p, bitmask_ptr, bitmask_size * 8); trace_seq_putc(p, 0); return ret; } |
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EXPORT_SYMBOL_GPL(trace_print_bitmask_seq); |
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const char * |
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trace_print_hex_seq(struct trace_seq *p, const unsigned char *buf, int buf_len) |
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{ int i; |
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const char *ret = trace_seq_buffer_ptr(p); |
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for (i = 0; i < buf_len; i++) trace_seq_printf(p, "%s%2.2x", i == 0 ? "" : " ", buf[i]); trace_seq_putc(p, 0); return ret; } |
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EXPORT_SYMBOL(trace_print_hex_seq); |
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const char * |
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trace_print_array_seq(struct trace_seq *p, const void *buf, int count, size_t el_size) |
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{ const char *ret = trace_seq_buffer_ptr(p); const char *prefix = ""; void *ptr = (void *)buf; |
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size_t buf_len = count * el_size; |
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trace_seq_putc(p, '{'); while (ptr < buf + buf_len) { switch (el_size) { case 1: trace_seq_printf(p, "%s0x%x", prefix, *(u8 *)ptr); break; case 2: trace_seq_printf(p, "%s0x%x", prefix, *(u16 *)ptr); break; case 4: trace_seq_printf(p, "%s0x%x", prefix, *(u32 *)ptr); break; case 8: trace_seq_printf(p, "%s0x%llx", prefix, *(u64 *)ptr); break; default: trace_seq_printf(p, "BAD SIZE:%zu 0x%x", el_size, *(u8 *)ptr); el_size = 1; } prefix = ","; ptr += el_size; } trace_seq_putc(p, '}'); trace_seq_putc(p, 0); return ret; } |
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EXPORT_SYMBOL(trace_print_array_seq); |
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int trace_raw_output_prep(struct trace_iterator *iter, struct trace_event *trace_event) |
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{ |
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struct trace_event_call *event; |
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struct trace_seq *s = &iter->seq; struct trace_seq *p = &iter->tmp_seq; struct trace_entry *entry; |
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event = container_of(trace_event, struct trace_event_call, event); |
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entry = iter->ent; if (entry->type != event->event.type) { WARN_ON_ONCE(1); return TRACE_TYPE_UNHANDLED; } trace_seq_init(p); |
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trace_seq_printf(s, "%s: ", trace_event_name(event)); |
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return trace_handle_return(s); |
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} |
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EXPORT_SYMBOL(trace_raw_output_prep); |
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static int trace_output_raw(struct trace_iterator *iter, char *name, char *fmt, va_list ap) |
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{ struct trace_seq *s = &iter->seq; |
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trace_seq_printf(s, "%s: ", name); trace_seq_vprintf(s, fmt, ap); |
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return trace_handle_return(s); |
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} |
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int trace_output_call(struct trace_iterator *iter, char *name, char *fmt, ...) |
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{ va_list ap; int ret; va_start(ap, fmt); |
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ret = trace_output_raw(iter, name, fmt, ap); |
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va_end(ap); return ret; } |
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EXPORT_SYMBOL_GPL(trace_output_call); |
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#ifdef CONFIG_KRETPROBES static inline const char *kretprobed(const char *name) { static const char tramp_name[] = "kretprobe_trampoline"; int size = sizeof(tramp_name); if (strncmp(tramp_name, name, size) == 0) return "[unknown/kretprobe'd]"; return name; } #else static inline const char *kretprobed(const char *name) { return name; } #endif /* CONFIG_KRETPROBES */ |
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static void |
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seq_print_sym_short(struct trace_seq *s, const char *fmt, unsigned long address) { #ifdef CONFIG_KALLSYMS char str[KSYM_SYMBOL_LEN]; const char *name; kallsyms_lookup(address, NULL, NULL, NULL, str); name = kretprobed(str); |
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trace_seq_printf(s, fmt, name); |
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#endif |
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} |
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static void |
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seq_print_sym_offset(struct trace_seq *s, const char *fmt, unsigned long address) { #ifdef CONFIG_KALLSYMS char str[KSYM_SYMBOL_LEN]; const char *name; sprint_symbol(str, address); name = kretprobed(str); |
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trace_seq_printf(s, fmt, name); |
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#endif |
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} #ifndef CONFIG_64BIT # define IP_FMT "%08lx" #else # define IP_FMT "%016lx" #endif |
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static int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm, unsigned long ip, unsigned long sym_flags) |
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{ struct file *file = NULL; unsigned long vmstart = 0; int ret = 1; |
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if (s->full) return 0; |
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if (mm) { const struct vm_area_struct *vma; down_read(&mm->mmap_sem); vma = find_vma(mm, ip); if (vma) { file = vma->vm_file; vmstart = vma->vm_start; } if (file) { ret = trace_seq_path(s, &file->f_path); if (ret) |
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trace_seq_printf(s, "[+0x%lx]", ip - vmstart); |
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} up_read(&mm->mmap_sem); } if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file)) |
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trace_seq_printf(s, " <" IP_FMT ">", ip); return !trace_seq_has_overflowed(s); |
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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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if (!ip) { trace_seq_putc(s, '0'); goto out; } |
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if (sym_flags & TRACE_ITER_SYM_OFFSET) |
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seq_print_sym_offset(s, "%s", ip); |
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else |
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seq_print_sym_short(s, "%s", ip); |
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if (sym_flags & TRACE_ITER_SYM_ADDR) |
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trace_seq_printf(s, " <" IP_FMT ">", ip); out: return !trace_seq_has_overflowed(s); |
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} |
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/** * trace_print_lat_fmt - print the irq, preempt and lockdep fields * @s: trace seq struct to write to * @entry: The trace entry field from the ring buffer * * Prints the generic fields of irqs off, in hard or softirq, preempt |
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* count. |
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*/ int trace_print_lat_fmt(struct trace_seq *s, struct trace_entry *entry) |
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{ |
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char hardsoft_irq; char need_resched; char irqs_off; int hardirq; int softirq; |
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int nmi; |
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nmi = entry->flags & TRACE_FLAG_NMI; |
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hardirq = entry->flags & TRACE_FLAG_HARDIRQ; softirq = entry->flags & TRACE_FLAG_SOFTIRQ; |
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irqs_off = (entry->flags & TRACE_FLAG_IRQS_OFF) ? 'd' : (entry->flags & TRACE_FLAG_IRQS_NOSUPPORT) ? 'X' : '.'; |
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switch (entry->flags & (TRACE_FLAG_NEED_RESCHED | TRACE_FLAG_PREEMPT_RESCHED)) { case TRACE_FLAG_NEED_RESCHED | TRACE_FLAG_PREEMPT_RESCHED: need_resched = 'N'; break; case TRACE_FLAG_NEED_RESCHED: need_resched = 'n'; break; case TRACE_FLAG_PREEMPT_RESCHED: need_resched = 'p'; break; default: need_resched = '.'; break; } |
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hardsoft_irq = |
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(nmi && hardirq) ? 'Z' : nmi ? 'z' : |
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(hardirq && softirq) ? 'H' : |
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hardirq ? 'h' : softirq ? 's' : '.' ; |
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trace_seq_printf(s, "%c%c%c", irqs_off, need_resched, hardsoft_irq); |
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if (entry->preempt_count) |
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trace_seq_printf(s, "%x", entry->preempt_count); |
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else |
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trace_seq_putc(s, '.'); |
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return !trace_seq_has_overflowed(s); |
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} |
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static int lat_print_generic(struct trace_seq *s, struct trace_entry *entry, int cpu) { char comm[TASK_COMM_LEN]; trace_find_cmdline(entry->pid, comm); |
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trace_seq_printf(s, "%8.8s-%-5d %3d", comm, entry->pid, cpu); |
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return trace_print_lat_fmt(s, entry); } |
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#undef MARK #define MARK(v, s) {.val = v, .sym = s} /* trace overhead mark */ static const struct trace_mark { unsigned long long val; /* unit: nsec */ char sym; } mark[] = { MARK(1000000000ULL , '$'), /* 1 sec */ |
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MARK(100000000ULL , '@'), /* 100 msec */ MARK(10000000ULL , '*'), /* 10 msec */ |
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MARK(1000000ULL , '#'), /* 1000 usecs */ MARK(100000ULL , '!'), /* 100 usecs */ MARK(10000ULL , '+'), /* 10 usecs */ }; #undef MARK char trace_find_mark(unsigned long long d) { int i; int size = ARRAY_SIZE(mark); for (i = 0; i < size; i++) { |
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if (d > mark[i].val) |
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break; } return (i == size) ? ' ' : mark[i].sym; } |
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static int |
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lat_print_timestamp(struct trace_iterator *iter, u64 next_ts) |
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{ |
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struct trace_array *tr = iter->tr; unsigned long verbose = tr->trace_flags & TRACE_ITER_VERBOSE; |
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unsigned long in_ns = iter->iter_flags & TRACE_FILE_TIME_IN_NS; |
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unsigned long long abs_ts = iter->ts - iter->trace_buffer->time_start; |
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unsigned long long rel_ts = next_ts - iter->ts; struct trace_seq *s = &iter->seq; if (in_ns) { abs_ts = ns2usecs(abs_ts); rel_ts = ns2usecs(rel_ts); } if (verbose && in_ns) { unsigned long abs_usec = do_div(abs_ts, USEC_PER_MSEC); unsigned long abs_msec = (unsigned long)abs_ts; unsigned long rel_usec = do_div(rel_ts, USEC_PER_MSEC); unsigned long rel_msec = (unsigned long)rel_ts; |
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trace_seq_printf( s, "[%08llx] %ld.%03ldms (+%ld.%03ldms): ", ns2usecs(iter->ts), abs_msec, abs_usec, rel_msec, rel_usec); |
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} else if (verbose && !in_ns) { |
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trace_seq_printf( s, "[%016llx] %lld (+%lld): ", iter->ts, abs_ts, rel_ts); |
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} else if (!verbose && in_ns) { |
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trace_seq_printf( s, " %4lldus%c: ", abs_ts, |
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trace_find_mark(rel_ts * NSEC_PER_USEC)); |
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} else { /* !verbose && !in_ns */ |
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trace_seq_printf(s, " %4lld: ", abs_ts); |
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} |
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return !trace_seq_has_overflowed(s); |
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} int trace_print_context(struct trace_iterator *iter) { |
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struct trace_array *tr = iter->tr; |
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struct trace_seq *s = &iter->seq; struct trace_entry *entry = iter->ent; |
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unsigned long long t; unsigned long secs, usec_rem; |
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char comm[TASK_COMM_LEN]; trace_find_cmdline(entry->pid, comm); |
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trace_seq_printf(s, "%16s-%-5d [%03d] ", |
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comm, entry->pid, iter->cpu); |
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if (tr->trace_flags & TRACE_ITER_IRQ_INFO) |
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trace_print_lat_fmt(s, entry); |
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if (iter->iter_flags & TRACE_FILE_TIME_IN_NS) { t = ns2usecs(iter->ts); usec_rem = do_div(t, USEC_PER_SEC); secs = (unsigned long)t; |
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trace_seq_printf(s, " %5lu.%06lu: ", secs, usec_rem); |
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} else |
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trace_seq_printf(s, " %12llu: ", iter->ts); return !trace_seq_has_overflowed(s); |
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} int trace_print_lat_context(struct trace_iterator *iter) { |
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struct trace_array *tr = iter->tr; |
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/* trace_find_next_entry will reset ent_size */ int ent_size = iter->ent_size; |
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struct trace_seq *s = &iter->seq; |
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u64 next_ts; |
c4a8e8be2
|
532 533 534 |
struct trace_entry *entry = iter->ent, *next_entry = trace_find_next_entry(iter, NULL, &next_ts); |
983f938ae
|
535 |
unsigned long verbose = (tr->trace_flags & TRACE_ITER_VERBOSE); |
c4a8e8be2
|
536 |
|
db4c75cbe
|
537 538 |
/* Restore the original ent_size */ iter->ent_size = ent_size; |
c4a8e8be2
|
539 540 |
if (!next_entry) next_ts = iter->ts; |
c4a8e8be2
|
541 542 |
if (verbose) { |
4ca530852
|
543 544 545 |
char comm[TASK_COMM_LEN]; trace_find_cmdline(entry->pid, comm); |
19a7fe206
|
546 547 548 549 |
trace_seq_printf( s, "%16s %5d %3d %d %08x %08lx ", comm, entry->pid, iter->cpu, entry->flags, entry->preempt_count, iter->idx); |
c4a8e8be2
|
550 |
} else { |
19a7fe206
|
551 |
lat_print_generic(s, entry, iter->cpu); |
c4a8e8be2
|
552 |
} |
19a7fe206
|
553 |
lat_print_timestamp(iter, next_ts); |
8be0709f1
|
554 |
|
19a7fe206
|
555 |
return !trace_seq_has_overflowed(s); |
c4a8e8be2
|
556 |
} |
f633cef02
|
557 558 559 560 561 562 563 564 |
static const char state_to_char[] = TASK_STATE_TO_CHAR_STR; static int task_state_char(unsigned long state) { int bit = state ? __ffs(state) + 1 : 0; return bit < sizeof(state_to_char) - 1 ? state_to_char[bit] : '?'; } |
f0868d1e2
|
565 566 567 568 569 |
/** * ftrace_find_event - find a registered event * @type: the type of event to look for * * Returns an event of type @type otherwise NULL |
4f5359685
|
570 |
* Called with trace_event_read_lock() held. |
f0868d1e2
|
571 572 573 574 |
*/ struct trace_event *ftrace_find_event(int type) { struct trace_event *event; |
f0868d1e2
|
575 576 577 |
unsigned key; key = type & (EVENT_HASHSIZE - 1); |
b67bfe0d4
|
578 |
hlist_for_each_entry(event, &event_hash[key], node) { |
f0868d1e2
|
579 580 581 582 583 584 |
if (event->type == type) return event; } return NULL; } |
060fa5c83
|
585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 |
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??? */ |
609a74045
|
608 |
if ((last + 1) > TRACE_EVENT_TYPE_MAX) |
060fa5c83
|
609 610 611 612 613 |
return 0; *list = &e->list; return last + 1; } |
4f5359685
|
614 615 |
void trace_event_read_lock(void) { |
52f6ad6dc
|
616 |
down_read(&trace_event_sem); |
4f5359685
|
617 618 619 620 |
} void trace_event_read_unlock(void) { |
52f6ad6dc
|
621 |
up_read(&trace_event_sem); |
4f5359685
|
622 |
} |
f0868d1e2
|
623 |
/** |
9023c9309
|
624 |
* register_trace_event - register output for an event type |
f0868d1e2
|
625 626 627 628 629 630 631 632 633 634 635 636 637 |
* @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. */ |
9023c9309
|
638 |
int register_trace_event(struct trace_event *event) |
f0868d1e2
|
639 640 641 |
{ unsigned key; int ret = 0; |
52f6ad6dc
|
642 |
down_write(&trace_event_sem); |
f0868d1e2
|
643 |
|
060fa5c83
|
644 |
if (WARN_ON(!event)) |
28bea271e
|
645 |
goto out; |
28bea271e
|
646 |
|
a9a577638
|
647 648 |
if (WARN_ON(!event->funcs)) goto out; |
060fa5c83
|
649 650 651 |
INIT_LIST_HEAD(&event->list); if (!event->type) { |
48dd0fed9
|
652 |
struct list_head *list = NULL; |
060fa5c83
|
653 |
|
609a74045
|
654 |
if (next_event_type > TRACE_EVENT_TYPE_MAX) { |
060fa5c83
|
655 656 657 658 659 660 |
event->type = trace_search_list(&list); if (!event->type) goto out; } else { |
8e1e1df29
|
661 |
|
060fa5c83
|
662 663 664 665 666 667 668 669 670 671 |
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) { |
f0868d1e2
|
672 673 674 |
printk(KERN_WARNING "Need to add type to trace.h "); WARN_ON(1); |
f0868d1e2
|
675 |
goto out; |
060fa5c83
|
676 677 678 679 680 |
} else { /* Is this event already used */ if (ftrace_find_event(event->type)) goto out; } |
f0868d1e2
|
681 |
|
a9a577638
|
682 683 684 685 686 687 688 689 |
if (event->funcs->trace == NULL) event->funcs->trace = trace_nop_print; if (event->funcs->raw == NULL) event->funcs->raw = trace_nop_print; if (event->funcs->hex == NULL) event->funcs->hex = trace_nop_print; if (event->funcs->binary == NULL) event->funcs->binary = trace_nop_print; |
268ccda0c
|
690 |
|
f0868d1e2
|
691 |
key = event->type & (EVENT_HASHSIZE - 1); |
4f5359685
|
692 |
hlist_add_head(&event->node, &event_hash[key]); |
f0868d1e2
|
693 694 695 |
ret = event->type; out: |
52f6ad6dc
|
696 |
up_write(&trace_event_sem); |
f0868d1e2
|
697 698 699 |
return ret; } |
9023c9309
|
700 |
EXPORT_SYMBOL_GPL(register_trace_event); |
f0868d1e2
|
701 |
|
110bf2b76
|
702 |
/* |
52f6ad6dc
|
703 |
* Used by module code with the trace_event_sem held for write. |
110bf2b76
|
704 |
*/ |
9023c9309
|
705 |
int __unregister_trace_event(struct trace_event *event) |
110bf2b76
|
706 707 708 709 710 |
{ hlist_del(&event->node); list_del(&event->list); return 0; } |
f0868d1e2
|
711 |
/** |
9023c9309
|
712 |
* unregister_trace_event - remove a no longer used event |
f0868d1e2
|
713 714 |
* @event: the event to remove */ |
9023c9309
|
715 |
int unregister_trace_event(struct trace_event *event) |
f0868d1e2
|
716 |
{ |
52f6ad6dc
|
717 |
down_write(&trace_event_sem); |
9023c9309
|
718 |
__unregister_trace_event(event); |
52f6ad6dc
|
719 |
up_write(&trace_event_sem); |
f0868d1e2
|
720 721 722 |
return 0; } |
9023c9309
|
723 |
EXPORT_SYMBOL_GPL(unregister_trace_event); |
f633cef02
|
724 725 726 727 |
/* * Standard events */ |
a9a577638
|
728 729 |
enum print_line_t trace_nop_print(struct trace_iterator *iter, int flags, struct trace_event *event) |
f633cef02
|
730 |
{ |
19a7fe206
|
731 732 |
trace_seq_printf(&iter->seq, "type: %d ", iter->ent->type); |
ee5e51f51
|
733 |
|
19a7fe206
|
734 |
return trace_handle_return(&iter->seq); |
f633cef02
|
735 736 737 |
} /* TRACE_FN */ |
a9a577638
|
738 739 |
static enum print_line_t trace_fn_trace(struct trace_iterator *iter, int flags, struct trace_event *event) |
f633cef02
|
740 741 |
{ struct ftrace_entry *field; |
2c9b238eb
|
742 |
struct trace_seq *s = &iter->seq; |
f633cef02
|
743 |
|
2c9b238eb
|
744 |
trace_assign_type(field, iter->ent); |
f633cef02
|
745 |
|
19a7fe206
|
746 |
seq_print_ip_sym(s, field->ip, flags); |
f633cef02
|
747 748 |
if ((flags & TRACE_ITER_PRINT_PARENT) && field->parent_ip) { |
19a7fe206
|
749 750 |
trace_seq_puts(s, " <-"); seq_print_ip_sym(s, field->parent_ip, flags); |
f633cef02
|
751 |
} |
f633cef02
|
752 |
|
19a7fe206
|
753 754 |
trace_seq_putc(s, ' '); |
f633cef02
|
755 |
|
19a7fe206
|
756 |
return trace_handle_return(s); |
f633cef02
|
757 |
} |
a9a577638
|
758 759 |
static enum print_line_t trace_fn_raw(struct trace_iterator *iter, int flags, struct trace_event *event) |
f633cef02
|
760 761 |
{ struct ftrace_entry *field; |
2c9b238eb
|
762 |
trace_assign_type(field, iter->ent); |
f633cef02
|
763 |
|
19a7fe206
|
764 765 766 767 |
trace_seq_printf(&iter->seq, "%lx %lx ", field->ip, field->parent_ip); |
f633cef02
|
768 |
|
19a7fe206
|
769 |
return trace_handle_return(&iter->seq); |
f633cef02
|
770 |
} |
a9a577638
|
771 772 |
static enum print_line_t trace_fn_hex(struct trace_iterator *iter, int flags, struct trace_event *event) |
f633cef02
|
773 774 |
{ struct ftrace_entry *field; |
2c9b238eb
|
775 |
struct trace_seq *s = &iter->seq; |
f633cef02
|
776 |
|
2c9b238eb
|
777 |
trace_assign_type(field, iter->ent); |
f633cef02
|
778 |
|
19a7fe206
|
779 780 |
SEQ_PUT_HEX_FIELD(s, field->ip); SEQ_PUT_HEX_FIELD(s, field->parent_ip); |
f633cef02
|
781 |
|
19a7fe206
|
782 |
return trace_handle_return(s); |
f633cef02
|
783 |
} |
a9a577638
|
784 785 |
static enum print_line_t trace_fn_bin(struct trace_iterator *iter, int flags, struct trace_event *event) |
f633cef02
|
786 787 |
{ struct ftrace_entry *field; |
2c9b238eb
|
788 |
struct trace_seq *s = &iter->seq; |
f633cef02
|
789 |
|
2c9b238eb
|
790 |
trace_assign_type(field, iter->ent); |
f633cef02
|
791 |
|
19a7fe206
|
792 793 |
SEQ_PUT_FIELD(s, field->ip); SEQ_PUT_FIELD(s, field->parent_ip); |
f633cef02
|
794 |
|
19a7fe206
|
795 |
return trace_handle_return(s); |
f633cef02
|
796 |
} |
a9a577638
|
797 |
static struct trace_event_functions trace_fn_funcs = { |
f633cef02
|
798 |
.trace = trace_fn_trace, |
f633cef02
|
799 800 801 802 |
.raw = trace_fn_raw, .hex = trace_fn_hex, .binary = trace_fn_bin, }; |
a9a577638
|
803 804 805 806 |
static struct trace_event trace_fn_event = { .type = TRACE_FN, .funcs = &trace_fn_funcs, }; |
f633cef02
|
807 |
/* TRACE_CTX an TRACE_WAKE */ |
ae7462b4f
|
808 809 |
static enum print_line_t trace_ctxwake_print(struct trace_iterator *iter, char *delim) |
f633cef02
|
810 811 |
{ struct ctx_switch_entry *field; |
4ca530852
|
812 |
char comm[TASK_COMM_LEN]; |
f633cef02
|
813 |
int S, T; |
4ca530852
|
814 |
|
2c9b238eb
|
815 |
trace_assign_type(field, iter->ent); |
f633cef02
|
816 817 818 |
T = task_state_char(field->next_state); S = task_state_char(field->prev_state); |
4ca530852
|
819 |
trace_find_cmdline(field->next_pid, comm); |
19a7fe206
|
820 821 822 823 824 825 826 827 828 829 830 831 |
trace_seq_printf(&iter->seq, " %5d:%3d:%c %s [%03d] %5d:%3d:%c %s ", field->prev_pid, field->prev_prio, S, delim, field->next_cpu, field->next_pid, field->next_prio, T, comm); return trace_handle_return(&iter->seq); |
f633cef02
|
832 |
} |
a9a577638
|
833 834 |
static enum print_line_t trace_ctx_print(struct trace_iterator *iter, int flags, struct trace_event *event) |
f633cef02
|
835 |
{ |
2c9b238eb
|
836 |
return trace_ctxwake_print(iter, "==>"); |
f633cef02
|
837 |
} |
ae7462b4f
|
838 |
static enum print_line_t trace_wake_print(struct trace_iterator *iter, |
a9a577638
|
839 |
int flags, struct trace_event *event) |
f633cef02
|
840 |
{ |
2c9b238eb
|
841 |
return trace_ctxwake_print(iter, " +"); |
f633cef02
|
842 |
} |
2c9b238eb
|
843 |
static int trace_ctxwake_raw(struct trace_iterator *iter, char S) |
f633cef02
|
844 845 846 |
{ struct ctx_switch_entry *field; int T; |
2c9b238eb
|
847 |
trace_assign_type(field, iter->ent); |
f633cef02
|
848 849 |
if (!S) |
b0f56f1a6
|
850 |
S = task_state_char(field->prev_state); |
f633cef02
|
851 |
T = task_state_char(field->next_state); |
19a7fe206
|
852 853 854 855 856 857 858 859 860 861 862 |
trace_seq_printf(&iter->seq, "%d %d %c %d %d %d %c ", field->prev_pid, field->prev_prio, S, field->next_cpu, field->next_pid, field->next_prio, T); return trace_handle_return(&iter->seq); |
f633cef02
|
863 |
} |
a9a577638
|
864 865 |
static enum print_line_t trace_ctx_raw(struct trace_iterator *iter, int flags, struct trace_event *event) |
f633cef02
|
866 |
{ |
2c9b238eb
|
867 |
return trace_ctxwake_raw(iter, 0); |
f633cef02
|
868 |
} |
a9a577638
|
869 870 |
static enum print_line_t trace_wake_raw(struct trace_iterator *iter, int flags, struct trace_event *event) |
f633cef02
|
871 |
{ |
2c9b238eb
|
872 |
return trace_ctxwake_raw(iter, '+'); |
f633cef02
|
873 |
} |
2c9b238eb
|
874 |
static int trace_ctxwake_hex(struct trace_iterator *iter, char S) |
f633cef02
|
875 876 |
{ struct ctx_switch_entry *field; |
2c9b238eb
|
877 |
struct trace_seq *s = &iter->seq; |
f633cef02
|
878 |
int T; |
2c9b238eb
|
879 |
trace_assign_type(field, iter->ent); |
f633cef02
|
880 881 |
if (!S) |
b0f56f1a6
|
882 |
S = task_state_char(field->prev_state); |
f633cef02
|
883 |
T = task_state_char(field->next_state); |
19a7fe206
|
884 885 886 887 888 889 890 |
SEQ_PUT_HEX_FIELD(s, field->prev_pid); SEQ_PUT_HEX_FIELD(s, field->prev_prio); SEQ_PUT_HEX_FIELD(s, S); SEQ_PUT_HEX_FIELD(s, field->next_cpu); SEQ_PUT_HEX_FIELD(s, field->next_pid); SEQ_PUT_HEX_FIELD(s, field->next_prio); SEQ_PUT_HEX_FIELD(s, T); |
f633cef02
|
891 |
|
19a7fe206
|
892 |
return trace_handle_return(s); |
f633cef02
|
893 |
} |
a9a577638
|
894 895 |
static enum print_line_t trace_ctx_hex(struct trace_iterator *iter, int flags, struct trace_event *event) |
f633cef02
|
896 |
{ |
2c9b238eb
|
897 |
return trace_ctxwake_hex(iter, 0); |
f633cef02
|
898 |
} |
a9a577638
|
899 900 |
static enum print_line_t trace_wake_hex(struct trace_iterator *iter, int flags, struct trace_event *event) |
f633cef02
|
901 |
{ |
2c9b238eb
|
902 |
return trace_ctxwake_hex(iter, '+'); |
f633cef02
|
903 |
} |
ae7462b4f
|
904 |
static enum print_line_t trace_ctxwake_bin(struct trace_iterator *iter, |
a9a577638
|
905 |
int flags, struct trace_event *event) |
f633cef02
|
906 907 |
{ struct ctx_switch_entry *field; |
2c9b238eb
|
908 |
struct trace_seq *s = &iter->seq; |
f633cef02
|
909 |
|
2c9b238eb
|
910 |
trace_assign_type(field, iter->ent); |
f633cef02
|
911 |
|
19a7fe206
|
912 913 914 915 916 917 918 |
SEQ_PUT_FIELD(s, field->prev_pid); SEQ_PUT_FIELD(s, field->prev_prio); SEQ_PUT_FIELD(s, field->prev_state); SEQ_PUT_FIELD(s, field->next_cpu); SEQ_PUT_FIELD(s, field->next_pid); SEQ_PUT_FIELD(s, field->next_prio); SEQ_PUT_FIELD(s, field->next_state); |
f633cef02
|
919 |
|
19a7fe206
|
920 |
return trace_handle_return(s); |
f633cef02
|
921 |
} |
a9a577638
|
922 |
static struct trace_event_functions trace_ctx_funcs = { |
f633cef02
|
923 |
.trace = trace_ctx_print, |
f633cef02
|
924 925 926 927 |
.raw = trace_ctx_raw, .hex = trace_ctx_hex, .binary = trace_ctxwake_bin, }; |
a9a577638
|
928 929 930 931 932 933 |
static struct trace_event trace_ctx_event = { .type = TRACE_CTX, .funcs = &trace_ctx_funcs, }; static struct trace_event_functions trace_wake_funcs = { |
f633cef02
|
934 |
.trace = trace_wake_print, |
f633cef02
|
935 936 937 938 |
.raw = trace_wake_raw, .hex = trace_wake_hex, .binary = trace_ctxwake_bin, }; |
a9a577638
|
939 940 941 942 |
static struct trace_event trace_wake_event = { .type = TRACE_WAKE, .funcs = &trace_wake_funcs, }; |
f633cef02
|
943 |
/* TRACE_STACK */ |
ae7462b4f
|
944 |
static enum print_line_t trace_stack_print(struct trace_iterator *iter, |
a9a577638
|
945 |
int flags, struct trace_event *event) |
f633cef02
|
946 947 |
{ struct stack_entry *field; |
2c9b238eb
|
948 |
struct trace_seq *s = &iter->seq; |
4a9bd3f13
|
949 950 |
unsigned long *p; unsigned long *end; |
f633cef02
|
951 |
|
2c9b238eb
|
952 |
trace_assign_type(field, iter->ent); |
4a9bd3f13
|
953 |
end = (unsigned long *)((long)iter->ent + iter->ent_size); |
f633cef02
|
954 |
|
19a7fe206
|
955 956 |
trace_seq_puts(s, "<stack trace> "); |
4a9bd3f13
|
957 958 |
for (p = field->caller; p && *p != ULONG_MAX && p < end; p++) { |
f633cef02
|
959 |
|
19a7fe206
|
960 961 |
if (trace_seq_has_overflowed(s)) break; |
f633cef02
|
962 |
|
19a7fe206
|
963 964 965 966 967 |
trace_seq_puts(s, " => "); seq_print_ip_sym(s, *p, flags); trace_seq_putc(s, ' '); } |
f633cef02
|
968 |
|
19a7fe206
|
969 |
return trace_handle_return(s); |
f633cef02
|
970 |
} |
a9a577638
|
971 |
static struct trace_event_functions trace_stack_funcs = { |
f633cef02
|
972 |
.trace = trace_stack_print, |
f633cef02
|
973 |
}; |
a9a577638
|
974 975 976 977 |
static struct trace_event trace_stack_event = { .type = TRACE_STACK, .funcs = &trace_stack_funcs, }; |
f633cef02
|
978 |
/* TRACE_USER_STACK */ |
ae7462b4f
|
979 |
static enum print_line_t trace_user_stack_print(struct trace_iterator *iter, |
a9a577638
|
980 |
int flags, struct trace_event *event) |
f633cef02
|
981 |
{ |
983f938ae
|
982 |
struct trace_array *tr = iter->tr; |
f633cef02
|
983 |
struct userstack_entry *field; |
2c9b238eb
|
984 |
struct trace_seq *s = &iter->seq; |
6b1032d53
|
985 986 |
struct mm_struct *mm = NULL; unsigned int i; |
f633cef02
|
987 |
|
2c9b238eb
|
988 |
trace_assign_type(field, iter->ent); |
f633cef02
|
989 |
|
19a7fe206
|
990 991 |
trace_seq_puts(s, "<user stack trace> "); |
6b1032d53
|
992 |
|
983f938ae
|
993 |
if (tr->trace_flags & TRACE_ITER_SYM_USEROBJ) { |
6b1032d53
|
994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006 1007 1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 |
struct task_struct *task; /* * we do the lookup on the thread group leader, * since individual threads might have already quit! */ rcu_read_lock(); task = find_task_by_vpid(field->tgid); if (task) mm = get_task_mm(task); rcu_read_unlock(); } for (i = 0; i < FTRACE_STACK_ENTRIES; i++) { unsigned long ip = field->caller[i]; if (ip == ULONG_MAX || trace_seq_has_overflowed(s)) break; trace_seq_puts(s, " => "); if (!ip) { trace_seq_puts(s, "??"); trace_seq_putc(s, ' '); continue; } seq_print_user_ip(s, mm, ip, flags); trace_seq_putc(s, ' '); } if (mm) mmput(mm); |
f633cef02
|
1028 |
|
19a7fe206
|
1029 |
return trace_handle_return(s); |
f633cef02
|
1030 |
} |
a9a577638
|
1031 |
static struct trace_event_functions trace_user_stack_funcs = { |
f633cef02
|
1032 |
.trace = trace_user_stack_print, |
f633cef02
|
1033 |
}; |
a9a577638
|
1034 1035 1036 1037 |
static struct trace_event trace_user_stack_event = { .type = TRACE_USER_STACK, .funcs = &trace_user_stack_funcs, }; |
09ae72348
|
1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 |
/* TRACE_BPUTS */ static enum print_line_t trace_bputs_print(struct trace_iterator *iter, int flags, struct trace_event *event) { struct trace_entry *entry = iter->ent; struct trace_seq *s = &iter->seq; struct bputs_entry *field; trace_assign_type(field, entry); |
19a7fe206
|
1048 1049 1050 |
seq_print_ip_sym(s, field->ip, flags); trace_seq_puts(s, ": "); trace_seq_puts(s, field->str); |
09ae72348
|
1051 |
|
19a7fe206
|
1052 |
return trace_handle_return(s); |
09ae72348
|
1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 |
} static enum print_line_t trace_bputs_raw(struct trace_iterator *iter, int flags, struct trace_event *event) { struct bputs_entry *field; struct trace_seq *s = &iter->seq; trace_assign_type(field, iter->ent); |
19a7fe206
|
1064 1065 |
trace_seq_printf(s, ": %lx : ", field->ip); trace_seq_puts(s, field->str); |
09ae72348
|
1066 |
|
19a7fe206
|
1067 |
return trace_handle_return(s); |
09ae72348
|
1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 |
} static struct trace_event_functions trace_bputs_funcs = { .trace = trace_bputs_print, .raw = trace_bputs_raw, }; static struct trace_event trace_bputs_event = { .type = TRACE_BPUTS, .funcs = &trace_bputs_funcs, }; |
48ead0203
|
1079 |
/* TRACE_BPRINT */ |
1427cdf05
|
1080 |
static enum print_line_t |
a9a577638
|
1081 1082 |
trace_bprint_print(struct trace_iterator *iter, int flags, struct trace_event *event) |
1427cdf05
|
1083 1084 1085 |
{ struct trace_entry *entry = iter->ent; struct trace_seq *s = &iter->seq; |
48ead0203
|
1086 |
struct bprint_entry *field; |
1427cdf05
|
1087 1088 |
trace_assign_type(field, entry); |
19a7fe206
|
1089 1090 1091 |
seq_print_ip_sym(s, field->ip, flags); trace_seq_puts(s, ": "); trace_seq_bprintf(s, field->fmt, field->buf); |
1427cdf05
|
1092 |
|
19a7fe206
|
1093 |
return trace_handle_return(s); |
1427cdf05
|
1094 |
} |
769b0441f
|
1095 |
|
48ead0203
|
1096 |
static enum print_line_t |
a9a577638
|
1097 1098 |
trace_bprint_raw(struct trace_iterator *iter, int flags, struct trace_event *event) |
1427cdf05
|
1099 |
{ |
48ead0203
|
1100 |
struct bprint_entry *field; |
1427cdf05
|
1101 |
struct trace_seq *s = &iter->seq; |
1427cdf05
|
1102 |
|
769b0441f
|
1103 |
trace_assign_type(field, iter->ent); |
1427cdf05
|
1104 |
|
19a7fe206
|
1105 1106 |
trace_seq_printf(s, ": %lx : ", field->ip); trace_seq_bprintf(s, field->fmt, field->buf); |
1427cdf05
|
1107 |
|
19a7fe206
|
1108 |
return trace_handle_return(s); |
1427cdf05
|
1109 |
} |
a9a577638
|
1110 1111 1112 1113 |
static struct trace_event_functions trace_bprint_funcs = { .trace = trace_bprint_print, .raw = trace_bprint_raw, }; |
769b0441f
|
1114 |
|
48ead0203
|
1115 1116 |
static struct trace_event trace_bprint_event = { .type = TRACE_BPRINT, |
a9a577638
|
1117 |
.funcs = &trace_bprint_funcs, |
48ead0203
|
1118 1119 1120 1121 |
}; /* TRACE_PRINT */ static enum print_line_t trace_print_print(struct trace_iterator *iter, |
a9a577638
|
1122 |
int flags, struct trace_event *event) |
48ead0203
|
1123 1124 1125 1126 1127 |
{ struct print_entry *field; struct trace_seq *s = &iter->seq; trace_assign_type(field, iter->ent); |
19a7fe206
|
1128 1129 |
seq_print_ip_sym(s, field->ip, flags); trace_seq_printf(s, ": %s", field->buf); |
48ead0203
|
1130 |
|
19a7fe206
|
1131 |
return trace_handle_return(s); |
48ead0203
|
1132 |
} |
a9a577638
|
1133 1134 |
static enum print_line_t trace_print_raw(struct trace_iterator *iter, int flags, struct trace_event *event) |
48ead0203
|
1135 1136 1137 1138 |
{ struct print_entry *field; trace_assign_type(field, iter->ent); |
19a7fe206
|
1139 |
trace_seq_printf(&iter->seq, "# %lx %s", field->ip, field->buf); |
48ead0203
|
1140 |
|
19a7fe206
|
1141 |
return trace_handle_return(&iter->seq); |
48ead0203
|
1142 |
} |
a9a577638
|
1143 |
static struct trace_event_functions trace_print_funcs = { |
769b0441f
|
1144 1145 |
.trace = trace_print_print, .raw = trace_print_raw, |
1427cdf05
|
1146 |
}; |
a9a577638
|
1147 1148 1149 1150 |
static struct trace_event trace_print_event = { .type = TRACE_PRINT, .funcs = &trace_print_funcs, }; |
48ead0203
|
1151 |
|
f633cef02
|
1152 1153 1154 1155 |
static struct trace_event *events[] __initdata = { &trace_fn_event, &trace_ctx_event, &trace_wake_event, |
f633cef02
|
1156 1157 |
&trace_stack_event, &trace_user_stack_event, |
09ae72348
|
1158 |
&trace_bputs_event, |
48ead0203
|
1159 |
&trace_bprint_event, |
f633cef02
|
1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 |
&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]; |
9023c9309
|
1171 |
ret = register_trace_event(event); |
f633cef02
|
1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 |
if (!ret) { printk(KERN_WARNING "event %d failed to register ", event->type); WARN_ON_ONCE(1); } } return 0; } |
7374e8277
|
1182 |
early_initcall(init_events); |