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-rw-r--r--kernel/trace/trace.c275
1 files changed, 1 insertions, 274 deletions
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index fca0233f1d73..90ce0c1d437b 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -38,6 +38,7 @@
#include <linux/irqflags.h>
#include "trace.h"
+#include "trace_output.h"
#define TRACE_BUFFER_FLAGS (RB_FL_OVERWRITE)
@@ -330,132 +331,6 @@ __update_max_tr(struct trace_array *tr, struct task_struct *tsk, int cpu)
tracing_record_cmdline(current);
}
-/**
- * trace_seq_printf - sequence printing of trace information
- * @s: trace sequence descriptor
- * @fmt: printf format string
- *
- * The tracer may use either sequence operations or its own
- * copy to user routines. To simplify formating of a trace
- * trace_seq_printf is used to store strings into a special
- * buffer (@s). Then the output may be either used by
- * the sequencer or pulled into another buffer.
- */
-int
-trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
-{
- int len = (PAGE_SIZE - 1) - s->len;
- va_list ap;
- int ret;
-
- if (!len)
- return 0;
-
- va_start(ap, fmt);
- ret = vsnprintf(s->buffer + s->len, len, fmt, ap);
- va_end(ap);
-
- /* If we can't write it all, don't bother writing anything */
- if (ret >= len)
- return 0;
-
- s->len += ret;
-
- return len;
-}
-
-/**
- * trace_seq_puts - trace sequence printing of simple string
- * @s: trace sequence descriptor
- * @str: simple string to record
- *
- * The tracer may use either the sequence operations or its own
- * copy to user routines. This function records a simple string
- * into a special buffer (@s) for later retrieval by a sequencer
- * or other mechanism.
- */
-static int
-trace_seq_puts(struct trace_seq *s, const char *str)
-{
- int len = strlen(str);
-
- if (len > ((PAGE_SIZE - 1) - s->len))
- return 0;
-
- memcpy(s->buffer + s->len, str, len);
- s->len += len;
-
- return len;
-}
-
-static int
-trace_seq_putc(struct trace_seq *s, unsigned char c)
-{
- if (s->len >= (PAGE_SIZE - 1))
- return 0;
-
- s->buffer[s->len++] = c;
-
- return 1;
-}
-
-static int
-trace_seq_putmem(struct trace_seq *s, void *mem, size_t len)
-{
- if (len > ((PAGE_SIZE - 1) - s->len))
- return 0;
-
- memcpy(s->buffer + s->len, mem, len);
- s->len += len;
-
- return len;
-}
-
-#define MAX_MEMHEX_BYTES 8
-#define HEX_CHARS (MAX_MEMHEX_BYTES*2 + 1)
-
-static int
-trace_seq_putmem_hex(struct trace_seq *s, void *mem, size_t len)
-{
- unsigned char hex[HEX_CHARS];
- unsigned char *data = mem;
- int i, j;
-
-#ifdef __BIG_ENDIAN
- for (i = 0, j = 0; i < len; i++) {
-#else
- for (i = len-1, j = 0; i >= 0; i--) {
-#endif
- hex[j++] = hex_asc_hi(data[i]);
- hex[j++] = hex_asc_lo(data[i]);
- }
- hex[j++] = ' ';
-
- return trace_seq_putmem(s, hex, j);
-}
-
-static int
-trace_seq_path(struct trace_seq *s, struct path *path)
-{
- unsigned char *p;
-
- if (s->len >= (PAGE_SIZE - 1))
- return 0;
- p = d_path(path, s->buffer + s->len, PAGE_SIZE - s->len);
- if (!IS_ERR(p)) {
- p = mangle_path(s->buffer + s->len, p, "\n");
- if (p) {
- s->len = p - s->buffer;
- return 1;
- }
- } else {
- s->buffer[s->len++] = '?';
- return 1;
- }
-
- return 0;
-}
-
static void
trace_seq_reset(struct trace_seq *s)
{
@@ -1473,154 +1348,6 @@ static void s_stop(struct seq_file *m, void *p)
mutex_unlock(&trace_types_lock);
}
-#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 */
-
-static int
-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);
-
- return trace_seq_printf(s, fmt, name);
-#endif
- return 1;
-}
-
-static int
-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);
-
- return trace_seq_printf(s, fmt, name);
-#endif
- return 1;
-}
-
-#ifndef CONFIG_64BIT
-# define IP_FMT "%08lx"
-#else
-# define IP_FMT "%016lx"
-#endif
-
-int
-seq_print_ip_sym(struct trace_seq *s, unsigned long ip, unsigned long sym_flags)
-{
- int ret;
-
- if (!ip)
- return trace_seq_printf(s, "0");
-
- if (sym_flags & TRACE_ITER_SYM_OFFSET)
- ret = seq_print_sym_offset(s, "%s", ip);
- else
- ret = seq_print_sym_short(s, "%s", ip);
-
- if (!ret)
- return 0;
-
- if (sym_flags & TRACE_ITER_SYM_ADDR)
- ret = trace_seq_printf(s, " <" IP_FMT ">", ip);
- return ret;
-}
-
-static inline int seq_print_user_ip(struct trace_seq *s, struct mm_struct *mm,
- unsigned long ip, unsigned long sym_flags)
-{
- struct file *file = NULL;
- unsigned long vmstart = 0;
- int ret = 1;
-
- 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)
- ret = trace_seq_printf(s, "[+0x%lx]", ip - vmstart);
- }
- up_read(&mm->mmap_sem);
- }
- if (ret && ((sym_flags & TRACE_ITER_SYM_ADDR) || !file))
- ret = trace_seq_printf(s, " <" IP_FMT ">", ip);
- return ret;
-}
-
-static int
-seq_print_userip_objs(const struct userstack_entry *entry, struct trace_seq *s,
- unsigned long sym_flags)
-{
- struct mm_struct *mm = NULL;
- int ret = 1;
- unsigned int i;
-
- if (trace_flags & TRACE_ITER_SYM_USEROBJ) {
- 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(entry->ent.tgid);
- if (task)
- mm = get_task_mm(task);
- rcu_read_unlock();
- }
-
- for (i = 0; i < FTRACE_STACK_ENTRIES; i++) {
- unsigned long ip = entry->caller[i];
-
- if (ip == ULONG_MAX || !ret)
- break;
- if (i && ret)
- ret = trace_seq_puts(s, " <- ");
- if (!ip) {
- if (ret)
- ret = trace_seq_puts(s, "??");
- continue;
- }
- if (!ret)
- break;
- if (ret)
- ret = seq_print_user_ip(s, mm, ip, sym_flags);
- }
-
- if (mm)
- mmput(mm);
- return ret;
-}
-
static void print_lat_help_header(struct seq_file *m)
{
seq_puts(m, "# _------=> CPU# \n");
generated by cgit v1.2.3 (git 2.0.4) at 2025-01-09 04:18:36 +0000