* va_list * to ltt_vtrace.
*/
+#define _GNU_SOURCE
+#include <unistd.h>
+#include <sys/syscall.h>
#include <stdarg.h>
#include <string.h>
#include <stdint.h>
#include "tracer.h"
//#include "list.h"
#include "usterr.h"
+#include "ust_snprintf.h"
enum ltt_type {
LTT_TYPE_SIGNED_INT,
LTT_TYPE_NONE,
};
+static int ust_get_cpu(void)
+{
+ return sched_getcpu();
+}
+
#define LTT_ATTRIBUTE_NETWORK_BYTE_ORDER (1<<1)
/*
* Field width and precision are *not* supported.
* %n not supported.
*/
-static inline const char *parse_c_type(const char *fmt,
- char *c_size, enum ltt_type *c_type)
+static inline
+const char *parse_c_type(const char *fmt, char *c_size, enum ltt_type *c_type,
+ char *outfmt)
{
int qualifier; /* 'h', 'l', or 'L' for integer fields */
/* 'z' support added 23/7/1999 S.H. */
}
}
+ if (outfmt) {
+ if (qualifier != -1)
+ *outfmt++ = (char)qualifier;
+ *outfmt++ = *fmt;
+ *outfmt = 0;
+ }
+
switch (*fmt) {
case 'c':
*c_type = LTT_TYPE_UNSIGNED_INT;
case LTT_TYPE_UNSIGNED_INT:
switch (c_size) {
case 1:
- tmp.v_ulong = (unsigned long)(uint8_t)
- va_arg(*args, unsigned int);
+ tmp.v_ulong = (unsigned long)(uint8_t)va_arg(*args, unsigned int);
break;
case 2:
- tmp.v_ulong = (unsigned long)(uint16_t)
- va_arg(*args, unsigned int);
+ tmp.v_ulong = (unsigned long)(uint16_t)va_arg(*args, unsigned int);
break;
case 4:
- tmp.v_ulong = (unsigned long)(uint32_t)
- va_arg(*args, unsigned int);
+ tmp.v_ulong = (unsigned long)(uint32_t)va_arg(*args, unsigned int);
break;
case 8:
tmp.v_uint64 = va_arg(*args, uint64_t);
return buf_offset;
}
-static notrace void skip_space(const char **ps)
-{
- while(**ps == ' ')
- (*ps)++;
-}
-
-static notrace void copy_token(char **out, const char **in)
-{
- while(**in != ' ' && **in != '\0') {
- **out = **in;
- (*out)++;
- (*in)++;
- }
-}
-
-/* serialize_to_text
- *
- * Given a format string and a va_list of arguments, convert them to a
- * human-readable string.
- *
- * @outbuf: the buffer to output the string to
- * @bufsize: the max size that can be used in outbuf
- * @fmt: the marker format string
- * @ap: a va_list that contains the arguments corresponding to fmt
- *
- * Return value: the number of chars that have been put in outbuf, excluding
- * the final \0, or, if the buffer was too small, the number of chars that
- * would have been written in outbuf if it had been large enough.
- *
- * outbuf may be NULL. The return value may then be used be allocate an
- * appropriate outbuf.
- *
- */
-
-notrace
-int serialize_to_text(char *outbuf, int bufsize, const char *fmt, va_list ap)
-{
- int fmt_len = strlen(fmt);
- char *new_fmt = alloca(fmt_len + 1);
- const char *orig_fmt_p = fmt;
- char *new_fmt_p = new_fmt;
- char false_buf;
- int result;
- enum { none, cfmt, tracefmt, argname } prev_token = none;
-
- while(*orig_fmt_p != '\0') {
- if(*orig_fmt_p == '%') {
- prev_token = cfmt;
- copy_token(&new_fmt_p, &orig_fmt_p);
- }
- else if(*orig_fmt_p == '#') {
- prev_token = tracefmt;
- do {
- orig_fmt_p++;
- } while(*orig_fmt_p != ' ' && *orig_fmt_p != '\0');
- }
- else if(*orig_fmt_p == ' ') {
- if(prev_token == argname) {
- *new_fmt_p = '=';
- new_fmt_p++;
- }
- else if(prev_token == cfmt) {
- *new_fmt_p = ' ';
- new_fmt_p++;
- }
-
- skip_space(&orig_fmt_p);
- }
- else {
- prev_token = argname;
- copy_token(&new_fmt_p, &orig_fmt_p);
- }
- }
-
- *new_fmt_p = '\0';
-
- if(outbuf == NULL) {
- /* use this false_buffer for compatibility with pre-C99 */
- outbuf = &false_buf;
- bufsize = 1;
- }
- result = vsnprintf(outbuf, bufsize, new_fmt, ap);
-
- return result;
-}
-
notrace size_t ltt_serialize_data(struct ust_buffer *buf, size_t buf_offset,
struct ltt_serialize_closure *closure,
void *serialize_private, int *largest_align,
++fmt; /* skip first '%' */
if (*fmt == '%') /* Escaped %% */
break;
- fmt = parse_c_type(fmt, &c_size, &c_type);
+ fmt = parse_c_type(fmt, &c_size, &c_type, NULL);
/*
* Output c types if no trace types has been
* specified.
size_t data_size, slot_size;
unsigned int chan_index;
struct ust_channel *channel;
- struct ltt_trace_struct *trace, *dest_trace = NULL;
+ struct ust_trace *trace, *dest_trace = NULL;
struct ust_buffer *buf;
void *transport_data;
u64 tsc;
struct ltt_serialize_closure closure;
struct ltt_probe_private_data *private_data = call_data;
void *serialize_private = NULL;
-//ust// int cpu;
+ int cpu;
unsigned int rflags;
/*
rcu_read_lock(); //ust// rcu_read_lock_sched_notrace();
//ust// cpu = smp_processor_id();
+ cpu = ust_get_cpu();
//ust// __get_cpu_var(ltt_nesting)++;
+ /* FIXME: should nesting be per-cpu? */
ltt_nesting++;
pdata = (struct ltt_active_marker *)probe_data;
if (!channel->active)
continue;
+ /* If a new cpu was plugged since the trace was started, we did
+ * not add it to the trace, and therefore we write the event to
+ * cpu 0.
+ */
+ if(cpu >= channel->n_cpus) {
+ cpu = 0;
+ }
+
/* reserve space : header and data */
ret = ltt_reserve_slot(trace, channel, &transport_data,
data_size, &slot_size, &buf_offset,
&tsc, &rflags,
- largest_align);
+ largest_align, cpu);
if (unlikely(ret < 0))
continue; /* buffer full */
va_copy(args_copy, *args);
/* FIXME : could probably encapsulate transport better. */
//ust// buf = ((struct rchan *)channel->trans_channel_data)->buf[cpu];
- buf = channel->buf;
+ buf = channel->buf[cpu];
/* Out-of-order write : header and data */
buf_offset = ltt_write_event_header(trace,
- buf, buf_offset,
+ channel, buf, buf_offset,
eID, data_size, tsc, rflags);
ltt_write_event_data(buf, buf_offset, &closure,
serialize_private,
largest_align, fmt, &args_copy);
va_end(args_copy);
/* Out-of-order commit */
- ltt_commit_slot(channel, &transport_data, buf_offset,
- data_size, slot_size);
+ ltt_commit_slot(channel, buf, buf_offset, data_size, slot_size);
DBG("just commited event at offset %ld and size %zd", buf_offset, slot_size);
}
//ust// __get_cpu_var(ltt_nesting)--;
va_end(args);
}
-//ust// MODULE_LICENSE("GPL");
-//ust// MODULE_AUTHOR("Mathieu Desnoyers");
-//ust// MODULE_DESCRIPTION("Linux Trace Toolkit Next Generation Serializer");
+static notrace void skip_space(const char **ps)
+{
+ while(**ps == ' ')
+ (*ps)++;
+}
+
+static notrace void copy_token(char **out, const char **in)
+{
+ while(**in != ' ' && **in != '\0') {
+ **out = **in;
+ (*out)++;
+ (*in)++;
+ }
+}
+
+/* serialize_to_text
+ *
+ * Given a format string and a va_list of arguments, convert them to a
+ * human-readable string.
+ *
+ * @outbuf: the buffer to output the string to
+ * @bufsize: the max size that can be used in outbuf
+ * @fmt: the marker format string
+ * @ap: a va_list that contains the arguments corresponding to fmt
+ *
+ * Return value: the number of chars that have been put in outbuf, excluding
+ * the final \0, or, if the buffer was too small, the number of chars that
+ * would have been written in outbuf if it had been large enough.
+ *
+ * outbuf may be NULL. The return value may then be used be allocate an
+ * appropriate outbuf.
+ *
+ */
+
+notrace
+int serialize_to_text(char *outbuf, int bufsize, const char *fmt, va_list ap)
+{
+ int fmt_len = strlen(fmt);
+ char *new_fmt = alloca(fmt_len + 1);
+ const char *orig_fmt_p = fmt;
+ char *new_fmt_p = new_fmt;
+ char false_buf;
+ int result;
+ enum { none, cfmt, tracefmt, argname } prev_token = none;
+
+ while(*orig_fmt_p != '\0') {
+ if(*orig_fmt_p == '%') {
+ prev_token = cfmt;
+ copy_token(&new_fmt_p, &orig_fmt_p);
+ }
+ else if(*orig_fmt_p == '#') {
+ prev_token = tracefmt;
+ do {
+ orig_fmt_p++;
+ } while(*orig_fmt_p != ' ' && *orig_fmt_p != '\0');
+ }
+ else if(*orig_fmt_p == ' ') {
+ if(prev_token == argname) {
+ *new_fmt_p = '=';
+ new_fmt_p++;
+ }
+ else if(prev_token == cfmt) {
+ *new_fmt_p = ' ';
+ new_fmt_p++;
+ }
+
+ skip_space(&orig_fmt_p);
+ }
+ else {
+ prev_token = argname;
+ copy_token(&new_fmt_p, &orig_fmt_p);
+ }
+ }
+
+ *new_fmt_p = '\0';
+
+ if(outbuf == NULL) {
+ /* use this false_buffer for compatibility with pre-C99 */
+ outbuf = &false_buf;
+ bufsize = 1;
+ }
+ result = ust_safe_vsnprintf(outbuf, bufsize, new_fmt, ap);
+
+ return result;
+}
projects / ust.git / blobdiff