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ftrace: introduce the "hex" output method

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Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
This commit is contained in:
Ingo Molnar 2008-05-12 21:20:49 +02:00 committed by Thomas Gleixner
parent 2e0f576185
commit 5e3ca0ec76
1 changed files with 92 additions and 1 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

93
kernel/trace/trace.c
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@ -103,7 +103,8 @@ enum trace_iterator_flags {
TRACE_ITER_SYM_ADDR = 0x04,
TRACE_ITER_VERBOSE = 0x08,
TRACE_ITER_RAW = 0x10,
TRACE_ITER_BIN = 0x20,
TRACE_ITER_HEX = 0x20,
TRACE_ITER_BIN = 0x40,
};
#define TRACE_ITER_SYM_MASK \
@ -116,6 +117,7 @@ static const char *trace_options[] = {
"sym-addr",
"verbose",
"raw",
"hex",
"bin",
NULL
};
@ -238,6 +240,47 @@ trace_seq_putmem(struct trace_seq *s, void *mem, size_t len)
return len;
}
#define HEX_CHARS 17
static notrace int
trace_seq_putmem_hex(struct trace_seq *s, void *mem, size_t len)
{
unsigned char hex[HEX_CHARS];
unsigned char *data;
unsigned char byte;
int i, j;
BUG_ON(len >= HEX_CHARS);
data = mem;
#ifdef __BIG_ENDIAN
for (i = 0, j = 0; i < len; i++) {
#else
for (i = len-1, j = 0; i >= 0; i--) {
#endif
byte = data[i];
hex[j] = byte & 0x0f;
if (hex[j] >= 10)
hex[j] += 'a' - 10;
else
hex[j] += '0';
j++;
hex[j] = byte >> 4;
if (hex[j] >= 10)
hex[j] += 'a' - 10;
else
hex[j] += '0';
j++;
}
hex[j] = ' ';
j++;
return trace_seq_putmem(s, hex, j);
}
static notrace void
trace_seq_reset(struct trace_seq *s)
{
@ -1274,6 +1317,51 @@ do { \
return 0; \
} while (0)
#define SEQ_PUT_HEX_FIELD_RET(s, x) \
do { \
if (!trace_seq_putmem_hex(s, &(x), sizeof(x))) \
return 0; \
} while (0)
static notrace int print_hex_fmt(struct trace_iterator *iter)
{
struct trace_seq *s = &iter->seq;
unsigned char newline = '\n';
struct trace_entry *entry;
int S;
entry = iter->ent;
SEQ_PUT_HEX_FIELD_RET(s, entry->pid);
SEQ_PUT_HEX_FIELD_RET(s, iter->cpu);
SEQ_PUT_HEX_FIELD_RET(s, entry->t);
switch (entry->type) {
case TRACE_FN:
SEQ_PUT_HEX_FIELD_RET(s, entry->fn.ip);
SEQ_PUT_HEX_FIELD_RET(s, entry->fn.parent_ip);
break;
case TRACE_CTX:
S = entry->ctx.prev_state < sizeof(state_to_char) ?
state_to_char[entry->ctx.prev_state] : 'X';
SEQ_PUT_HEX_FIELD_RET(s, entry->ctx.prev_pid);
SEQ_PUT_HEX_FIELD_RET(s, entry->ctx.prev_prio);
SEQ_PUT_HEX_FIELD_RET(s, S);
SEQ_PUT_HEX_FIELD_RET(s, entry->ctx.next_pid);
SEQ_PUT_HEX_FIELD_RET(s, entry->ctx.next_prio);
SEQ_PUT_HEX_FIELD_RET(s, entry->fn.parent_ip);
break;
case TRACE_SPECIAL:
SEQ_PUT_HEX_FIELD_RET(s, entry->special.arg1);
SEQ_PUT_HEX_FIELD_RET(s, entry->special.arg2);
SEQ_PUT_HEX_FIELD_RET(s, entry->special.arg3);
break;
}
SEQ_PUT_FIELD_RET(s, newline);
return 1;
}
static notrace int print_bin_fmt(struct trace_iterator *iter)
{
struct trace_seq *s = &iter->seq;
@ -1327,6 +1415,9 @@ static int print_trace_line(struct trace_iterator *iter)
if (trace_flags & TRACE_ITER_BIN)
return print_bin_fmt(iter);
if (trace_flags & TRACE_ITER_HEX)
return print_hex_fmt(iter);
if (trace_flags & TRACE_ITER_RAW)
return print_raw_fmt(iter);