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authorSachin Saxena <sachin.saxena@freescale.com>2018-02-28 20:28:52 +0530
committerSachin Saxena <sachin.saxena@nxp.com>2018-02-28 20:34:56 +0530
commit0689fce93ba269c48f83a2f70f971b3976d04c90 (patch)
tree4cc2908df3598507cc1828ac19d8c43b22450ffa /src/vppinfra/elog.c
parent746b57564deede624261ab8a96c94f562f24d22c (diff)
parentd594711a5d79859a7d0bde83a516f7ab52051d9b (diff)
Merge branch 'stable/1710' of https://gerrit.fd.io/r/vpp into 17101710
Diffstat (limited to 'src/vppinfra/elog.c')
-rw-r--r--src/vppinfra/elog.c1113
1 files changed, 1113 insertions, 0 deletions
diff --git a/src/vppinfra/elog.c b/src/vppinfra/elog.c
new file mode 100644
index 00000000..182ca127
--- /dev/null
+++ b/src/vppinfra/elog.c
@@ -0,0 +1,1113 @@
+/*
+ * Copyright (c) 2015 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/*
+ Copyright (c) 2005,2009 Eliot Dresselhaus
+
+ Permission is hereby granted, free of charge, to any person obtaining
+ a copy of this software and associated documentation files (the
+ "Software"), to deal in the Software without restriction, including
+ without limitation the rights to use, copy, modify, merge, publish,
+ distribute, sublicense, and/or sell copies of the Software, and to
+ permit persons to whom the Software is furnished to do so, subject to
+ the following conditions:
+
+ The above copyright notice and this permission notice shall be
+ included in all copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+#include <vppinfra/elog.h>
+#include <vppinfra/cache.h>
+#include <vppinfra/error.h>
+#include <vppinfra/format.h>
+#include <vppinfra/hash.h>
+#include <vppinfra/math.h>
+
+static inline void
+elog_lock (elog_main_t * em)
+{
+ if (PREDICT_FALSE (em->lock != 0))
+ while (__sync_lock_test_and_set (em->lock, 1))
+ ;
+}
+
+static inline void
+elog_unlock (elog_main_t * em)
+{
+ if (PREDICT_FALSE (em->lock != 0))
+ {
+ CLIB_MEMORY_BARRIER ();
+ *em->lock = 0;
+ }
+}
+
+/* Non-inline version. */
+void *
+elog_event_data (elog_main_t * em,
+ elog_event_type_t * type, elog_track_t * track, u64 cpu_time)
+{
+ return elog_event_data_inline (em, type, track, cpu_time);
+}
+
+static void
+new_event_type (elog_main_t * em, uword i)
+{
+ elog_event_type_t *t = vec_elt_at_index (em->event_types, i);
+
+ if (!em->event_type_by_format)
+ em->event_type_by_format =
+ hash_create_vec ( /* size */ 0, sizeof (u8), sizeof (uword));
+
+ t->type_index_plus_one = i + 1;
+ hash_set_mem (em->event_type_by_format, t->format, i);
+}
+
+static uword
+find_or_create_type (elog_main_t * em, elog_event_type_t * t)
+{
+ uword *p = hash_get_mem (em->event_type_by_format, t->format);
+ uword i;
+
+ if (p)
+ i = p[0];
+ else
+ {
+ i = vec_len (em->event_types);
+ vec_add1 (em->event_types, t[0]);
+ new_event_type (em, i);
+ }
+
+ return i;
+}
+
+/* External function to register types. */
+word
+elog_event_type_register (elog_main_t * em, elog_event_type_t * t)
+{
+ elog_event_type_t *static_type = t;
+ word l;
+
+ elog_lock (em);
+
+ /* Multiple simultaneous registration attempts, */
+ if (t->type_index_plus_one > 0)
+ {
+ elog_unlock (em);
+ return t->type_index_plus_one - 1;
+ }
+
+ l = vec_len (em->event_types);
+
+ t->type_index_plus_one = 1 + l;
+
+ ASSERT (t->format);
+
+ /* If format args are not specified try to be smart about providing defaults
+ so most of the time user does not have to specify them. */
+ if (!t->format_args)
+ {
+ uword i, l;
+ char *this_arg;
+
+ l = strlen (t->format);
+ for (i = 0; i < l; i++)
+ {
+ if (t->format[i] != '%')
+ continue;
+ if (i + 1 >= l)
+ continue;
+ if (t->format[i + 1] == '%') /* %% */
+ continue;
+
+ switch (t->format[i + 1])
+ {
+ default:
+ case 'd':
+ case 'x':
+ case 'u':
+ this_arg = "i4"; /* size of u32 */
+ break;
+ case 'f':
+ this_arg = "f8"; /* defaults to f64 */
+ break;
+ case 's':
+ this_arg = "s0"; /* defaults to null terminated string. */
+ break;
+ }
+
+ t->format_args =
+ (char *) format ((u8 *) t->format_args, "%s", this_arg);
+ }
+
+ /* Null terminate. */
+ vec_add1 (t->format_args, 0);
+ }
+
+ vec_add1 (em->event_types, t[0]);
+
+ t = em->event_types + l;
+
+ /* Make copies of strings for hashing etc. */
+ if (t->function)
+ t->format = (char *) format (0, "%s %s%c", t->function, t->format, 0);
+ else
+ t->format = (char *) format (0, "%s%c", t->format, 0);
+
+ t->format_args = (char *) format (0, "%s%c", t->format_args, 0);
+
+ /* Construct string table. */
+ {
+ uword i;
+ t->n_enum_strings = static_type->n_enum_strings;
+ for (i = 0; i < t->n_enum_strings; i++)
+ {
+ if (!static_type->enum_strings[i])
+ static_type->enum_strings[i] = "MISSING";
+ vec_add1 (t->enum_strings_vector,
+ (char *) format (0, "%s%c", static_type->enum_strings[i],
+ 0));
+ }
+ }
+
+ new_event_type (em, l);
+ elog_unlock (em);
+
+ return l;
+}
+
+word
+elog_track_register (elog_main_t * em, elog_track_t * t)
+{
+ word l;
+
+ elog_lock (em);
+
+ l = vec_len (em->tracks);
+
+ t->track_index_plus_one = 1 + l;
+
+ ASSERT (t->name);
+
+ vec_add1 (em->tracks, t[0]);
+
+ t = em->tracks + l;
+
+ t->name = (char *) format (0, "%s%c", t->name, 0);
+
+ elog_unlock (em);
+
+ return l;
+}
+
+static uword
+parse_2digit_decimal (char *p, uword * number)
+{
+ uword i = 0;
+ u8 digits[2];
+
+ digits[0] = digits[1] = 0;
+ while (p[i] >= '0' && p[i] <= '9')
+ {
+ if (i >= 2)
+ break;
+ digits[i] = p[i] - '0';
+ i++;
+ }
+
+ if (i >= 1 && i <= 2)
+ {
+ if (i == 1)
+ *number = digits[0];
+ else
+ *number = 10 * digits[0] + digits[1];
+ return i;
+ }
+ else
+ return 0;
+}
+
+static u8 *
+fixed_format (u8 * s, char *fmt, char *result, uword * result_len)
+{
+ char *f = fmt;
+ char *percent;
+ uword l = 0;
+
+ while (1)
+ {
+ if (f[0] == 0)
+ break;
+ if (f[0] == '%' && f[1] != '%')
+ break;
+ f++;
+ }
+ if (f > fmt)
+ vec_add (s, fmt, f - fmt);
+
+ if (f[0] != '%')
+ goto done;
+
+ /* Skip percent. */
+ percent = f++;
+
+ /* Skip possible +-= justification. */
+ f += f[0] == '+' || f[0] == '-' || f[0] == '=';
+
+ /* Skip possible X.Y width. */
+ while ((f[0] >= '0' && f[0] <= '9') || f[0] == '.')
+ f++;
+
+ /* Skip wlL as in e.g. %Ld. */
+ f += f[0] == 'w' || f[0] == 'l' || f[0] == 'L';
+
+ /* Finally skip format letter. */
+ f += f[0] != 0;
+
+ ASSERT (*result_len > f - percent);
+ l = clib_min (f - percent, *result_len - 1);
+ clib_memcpy (result, percent, l);
+ result[l] = 0;
+
+done:
+ *result_len = f - fmt;
+ return s;
+}
+
+u8 *
+format_elog_event (u8 * s, va_list * va)
+{
+ elog_main_t *em = va_arg (*va, elog_main_t *);
+ elog_event_t *e = va_arg (*va, elog_event_t *);
+ elog_event_type_t *t;
+ char *a, *f;
+ void *d = (u8 *) e->data;
+ char arg_format[64];
+
+ t = vec_elt_at_index (em->event_types, e->type);
+
+ f = t->format;
+ a = t->format_args;
+ while (1)
+ {
+ uword n_bytes = 0, n_digits, f_bytes = 0;
+
+ f_bytes = sizeof (arg_format);
+ s = fixed_format (s, f, arg_format, &f_bytes);
+ f += f_bytes;
+
+ if (a == 0 || a[0] == 0)
+ {
+ /* Format must also be at end. */
+ ASSERT (f[0] == 0);
+ break;
+ }
+
+ /* Don't go past end of event data. */
+ ASSERT (d < (void *) (e->data + sizeof (e->data)));
+
+ n_digits = parse_2digit_decimal (a + 1, &n_bytes);
+ switch (a[0])
+ {
+ case 'i':
+ case 't':
+ case 'T':
+ {
+ u32 i = 0;
+ u64 l = 0;
+
+ if (n_bytes == 1)
+ i = ((u8 *) d)[0];
+ else if (n_bytes == 2)
+ i = clib_mem_unaligned (d, u16);
+ else if (n_bytes == 4)
+ i = clib_mem_unaligned (d, u32);
+ else if (n_bytes == 8)
+ l = clib_mem_unaligned (d, u64);
+ else
+ ASSERT (0);
+ if (a[0] == 't')
+ {
+ char *e =
+ vec_elt (t->enum_strings_vector, n_bytes == 8 ? l : i);
+ s = format (s, arg_format, e);
+ }
+ else if (a[0] == 'T')
+ {
+ char *e =
+ vec_elt_at_index (em->string_table, n_bytes == 8 ? l : i);
+ s = format (s, arg_format, e);
+ }
+ else if (n_bytes == 8)
+ s = format (s, arg_format, l);
+ else
+ s = format (s, arg_format, i);
+ }
+ break;
+
+ case 'f':
+ {
+ f64 x = 0;
+ if (n_bytes == 4)
+ x = clib_mem_unaligned (d, f32);
+ else if (n_bytes == 8)
+ x = clib_mem_unaligned (d, f64);
+ else
+ ASSERT (0);
+ s = format (s, arg_format, x);
+ }
+ break;
+
+ case 's':
+ s = format (s, arg_format, d);
+ if (n_bytes == 0)
+ n_bytes = strlen (d) + 1;
+ break;
+
+ default:
+ ASSERT (0);
+ break;
+ }
+
+ ASSERT (n_digits > 0 && n_digits <= 2);
+ a += 1 + n_digits;
+ d += n_bytes;
+ }
+
+ return s;
+}
+
+u8 *
+format_elog_track (u8 * s, va_list * va)
+{
+ elog_main_t *em = va_arg (*va, elog_main_t *);
+ elog_event_t *e = va_arg (*va, elog_event_t *);
+ elog_track_t *t = vec_elt_at_index (em->tracks, e->track);
+ return format (s, "%s", t->name);
+}
+
+void
+elog_time_now (elog_time_stamp_t * et)
+{
+ u64 cpu_time_now, os_time_now_nsec;
+ struct timespec ts;
+
+#ifdef CLIB_UNIX
+ {
+#include <sys/syscall.h>
+ syscall (SYS_clock_gettime, CLOCK_REALTIME, &ts);
+ cpu_time_now = clib_cpu_time_now ();
+ /* Subtract 3/30/2017's worth of seconds to retain precision */
+ os_time_now_nsec = 1e9 * (ts.tv_sec - 1490885108) + ts.tv_nsec;
+ }
+#else
+ cpu_time_now = clib_cpu_time_now ();
+ os_time_now_nsec = 0;
+#endif
+
+ et->cpu = cpu_time_now;
+ et->os_nsec = os_time_now_nsec;
+}
+
+always_inline i64
+elog_time_stamp_diff_os_nsec (elog_time_stamp_t * t1, elog_time_stamp_t * t2)
+{
+ return (i64) t1->os_nsec - (i64) t2->os_nsec;
+}
+
+always_inline i64
+elog_time_stamp_diff_cpu (elog_time_stamp_t * t1, elog_time_stamp_t * t2)
+{
+ return (i64) t1->cpu - (i64) t2->cpu;
+}
+
+always_inline f64
+elog_nsec_per_clock (elog_main_t * em)
+{
+ return ((f64) elog_time_stamp_diff_os_nsec (&em->serialize_time,
+ &em->init_time)
+ / (f64) elog_time_stamp_diff_cpu (&em->serialize_time,
+ &em->init_time));
+}
+
+void
+elog_alloc (elog_main_t * em, u32 n_events)
+{
+ if (em->event_ring)
+ vec_free (em->event_ring);
+
+ /* Ring size must be a power of 2. */
+ em->event_ring_size = n_events = max_pow2 (n_events);
+
+ /* Leave an empty ievent at end so we can always speculatively write
+ and event there (possibly a long form event). */
+ vec_resize_aligned (em->event_ring, n_events, CLIB_CACHE_LINE_BYTES);
+}
+
+void
+elog_init (elog_main_t * em, u32 n_events)
+{
+ memset (em, 0, sizeof (em[0]));
+
+ em->lock = 0;
+
+ if (n_events > 0)
+ elog_alloc (em, n_events);
+
+ clib_time_init (&em->cpu_timer);
+
+ em->n_total_events_disable_limit = ~0;
+
+ /* Make track 0. */
+ em->default_track.name = "default";
+ elog_track_register (em, &em->default_track);
+
+ elog_time_now (&em->init_time);
+}
+
+/* Returns number of events in ring and start index. */
+static uword
+elog_event_range (elog_main_t * em, uword * lo)
+{
+ uword l = em->event_ring_size;
+ u64 i = em->n_total_events;
+
+ /* Ring never wrapped? */
+ if (i <= (u64) l)
+ {
+ if (lo)
+ *lo = 0;
+ return i;
+ }
+ else
+ {
+ if (lo)
+ *lo = i & (l - 1);
+ return l;
+ }
+}
+
+elog_event_t *
+elog_peek_events (elog_main_t * em)
+{
+ elog_event_t *e, *f, *es = 0;
+ uword i, j, n;
+
+ n = elog_event_range (em, &j);
+ for (i = 0; i < n; i++)
+ {
+ vec_add2 (es, e, 1);
+ f = vec_elt_at_index (em->event_ring, j);
+ e[0] = f[0];
+
+ /* Convert absolute time from cycles to seconds from start. */
+ e->time =
+ (e->time_cycles -
+ em->init_time.cpu) * em->cpu_timer.seconds_per_clock;
+
+ j = (j + 1) & (em->event_ring_size - 1);
+ }
+
+ return es;
+}
+
+/* Add a formatted string to the string table. */
+u32
+elog_string (elog_main_t * em, char *fmt, ...)
+{
+ u32 offset;
+ va_list va;
+
+ va_start (va, fmt);
+ offset = vec_len (em->string_table);
+ em->string_table = (char *) va_format ((u8 *) em->string_table, fmt, &va);
+ va_end (va);
+
+ /* Null terminate string if it is not already. */
+ if (vec_end (em->string_table)[-1] != 0)
+ vec_add1 (em->string_table, 0);
+
+ return offset;
+}
+
+elog_event_t *
+elog_get_events (elog_main_t * em)
+{
+ if (!em->events)
+ em->events = elog_peek_events (em);
+ return em->events;
+}
+
+static void
+maybe_fix_string_table_offset (elog_event_t * e,
+ elog_event_type_t * t, u32 offset)
+{
+ void *d = (u8 *) e->data;
+ char *a;
+
+ if (offset == 0)
+ return;
+
+ a = t->format_args;
+
+ while (1)
+ {
+ uword n_bytes = 0, n_digits;
+
+ if (a[0] == 0)
+ break;
+
+ /* Don't go past end of event data. */
+ ASSERT (d < (void *) (e->data + sizeof (e->data)));
+
+ n_digits = parse_2digit_decimal (a + 1, &n_bytes);
+ switch (a[0])
+ {
+ case 'T':
+ ASSERT (n_bytes == 4);
+ clib_mem_unaligned (d, u32) += offset;
+ break;
+
+ case 'i':
+ case 't':
+ case 'f':
+ case 's':
+ break;
+
+ default:
+ ASSERT (0);
+ break;
+ }
+
+ ASSERT (n_digits > 0 && n_digits <= 2);
+ a += 1 + n_digits;
+ d += n_bytes;
+ }
+}
+
+static int
+elog_cmp (void *a1, void *a2)
+{
+ elog_event_t *e1 = a1;
+ elog_event_t *e2 = a2;
+
+ if (e1->time < e2->time)
+ return -1;
+
+ if (e1->time > e2->time)
+ return 1;
+
+ return 0;
+}
+
+/*
+ * merge two event logs. Complicated and cranky.
+ */
+void
+elog_merge (elog_main_t * dst, u8 * dst_tag, elog_main_t * src, u8 * src_tag,
+ f64 align_tweak)
+{
+ elog_event_t *e;
+ uword l;
+ u32 string_table_offset_for_src_events;
+ u32 track_offset_for_src_tracks;
+ elog_track_t newt;
+ int i;
+
+ memset (&newt, 0, sizeof (newt));
+
+ /* Acquire src and dst events */
+ elog_get_events (src);
+ elog_get_events (dst);
+
+ string_table_offset_for_src_events = vec_len (dst->string_table);
+ vec_append (dst->string_table, src->string_table);
+
+ l = vec_len (dst->events);
+ vec_append (dst->events, src->events);
+
+ /* Prepend the supplied tag (if any) to all dst track names */
+ if (dst_tag)
+ {
+ for (i = 0; i < vec_len (dst->tracks); i++)
+ {
+ elog_track_t *t = vec_elt_at_index (dst->tracks, i);
+ char *new_name;
+
+ new_name = (char *) format (0, "%s:%s%c", dst_tag, t->name, 0);
+ vec_free (t->name);
+ t->name = new_name;
+ }
+ }
+
+ /*
+ * Remember where we started allocating new tracks while merging
+ */
+ track_offset_for_src_tracks = vec_len (dst->tracks);
+
+ /* Copy / tag source tracks */
+ for (i = 0; i < vec_len (src->tracks); i++)
+ {
+ elog_track_t *t = vec_elt_at_index (src->tracks, i);
+ if (src_tag)
+ newt.name = (char *) format (0, "%s:%s%c", src_tag, t->name, 0);
+ else
+ newt.name = (char *) format (0, "%s%c", t->name, 0);
+ (void) elog_track_register (dst, &newt);
+ vec_free (newt.name);
+ }
+
+ /* Across all (copied) src events... */
+ for (e = dst->events + l; e < vec_end (dst->events); e++)
+ {
+ elog_event_type_t *t = vec_elt_at_index (src->event_types, e->type);
+
+ /* Remap type from src -> dst. */
+ e->type = find_or_create_type (dst, t);
+
+ /* Remap string table offsets for 'T' format args */
+ maybe_fix_string_table_offset (e, t,
+ string_table_offset_for_src_events);
+
+ /* Remap track */
+ e->track += track_offset_for_src_tracks;
+ }
+
+ /* Adjust event times for relative starting times of event streams. */
+ {
+ f64 dt_event, dt_os_nsec, dt_clock_nsec;
+
+ /* Set clock parameters if dst was not generated by unserialize. */
+ if (dst->serialize_time.cpu == 0)
+ {
+ dst->init_time = src->init_time;
+ dst->serialize_time = src->serialize_time;
+ dst->nsec_per_cpu_clock = src->nsec_per_cpu_clock;
+ }
+
+ dt_os_nsec =
+ elog_time_stamp_diff_os_nsec (&src->init_time, &dst->init_time);
+
+ dt_event = dt_os_nsec;
+ dt_clock_nsec =
+ (elog_time_stamp_diff_cpu (&src->init_time, &dst->init_time) * .5 *
+ (dst->nsec_per_cpu_clock + src->nsec_per_cpu_clock));
+
+ /*
+ * Heuristic to see if src/dst came from same time source.
+ * If frequencies are "the same" and os clock and cpu clock agree
+ * to within 100e-9 secs about time difference between src/dst
+ * init_time, then we use cpu clock. Otherwise we use OS clock.
+ *
+ * When merging event logs from different systems, time paradoxes
+ * at the O(1ms) level are to be expected. Hence, the "align_tweak"
+ * parameter. If two events logged on different processors are known
+ * to occur in a specific order - and with a reasonably-estimated
+ * interval - supply a non-zero "align_tweak" parameter
+ */
+ if (fabs (src->nsec_per_cpu_clock - dst->nsec_per_cpu_clock) < 1e-2
+ && fabs (dt_os_nsec - dt_clock_nsec) < 100)
+ dt_event = dt_clock_nsec;
+
+ /* Convert to seconds. */
+ dt_event *= 1e-9;
+
+ /*
+ * Move the earlier set of events later, to avoid creating
+ * events which preceed the Big Bang (aka have negative timestamps).
+ *
+ * Not to any scale, we have something like the following picture:
+ *
+ * DST capture start point
+ * ^
+ * +--- dt_event --+
+ * v
+ * SRC capture start point
+ *
+ * In this case dt_event is positive, src started after dst,
+ * to put src events onto a common timebase we have to move them
+ * forward in time. Naturally, the opposite case is
+ * possible, too: dt_event will be negative, and so we have to
+ * move dst events forward in time by the |dt_event|.
+ * In both cases, we add align_tweak.
+ */
+ if (dt_event > 0)
+ {
+ /* Src started after dst. */
+ for (e = dst->events + l; e < vec_end (dst->events); e++)
+ e->time += dt_event + align_tweak;
+ }
+ else
+ {
+ /* Dst started after src. */
+ dt_event = -dt_event;
+ for (e = dst->events + 0; e < dst->events + l; e++)
+ e->time += dt_event + align_tweak;
+ }
+ }
+
+ /* Sort events by increasing time. */
+ vec_sort_with_function (dst->events, elog_cmp);
+
+ dst->n_total_events = vec_len (dst->events);
+
+ /* Recreate the event ring or the results won't serialize */
+ {
+ int i;
+
+ ASSERT (dst->cpu_timer.seconds_per_clock);
+
+ elog_alloc (dst, vec_len (dst->events));
+ for (i = 0; i < vec_len (dst->events); i++)
+ {
+ elog_event_t *es, *ed;
+
+ es = dst->events + i;
+ ed = dst->event_ring + i;
+
+ ed[0] = es[0];
+ }
+ }
+}
+
+static void
+serialize_elog_event (serialize_main_t * m, va_list * va)
+{
+ elog_main_t *em = va_arg (*va, elog_main_t *);
+ elog_event_t *e = va_arg (*va, elog_event_t *);
+ elog_event_type_t *t = vec_elt_at_index (em->event_types, e->type);
+ u8 *d = e->data;
+ u8 *p = (u8 *) t->format_args;
+
+ serialize_integer (m, e->type, sizeof (e->type));
+ serialize_integer (m, e->track, sizeof (e->track));
+ serialize (m, serialize_f64, e->time);
+
+ while (*p)
+ {
+ uword n_digits, n_bytes = 0;
+
+ n_digits = parse_2digit_decimal ((char *) p + 1, &n_bytes);
+
+ switch (p[0])
+ {
+ case 'i':
+ case 't':
+ case 'T':
+ if (n_bytes == 1)
+ serialize_integer (m, d[0], sizeof (u8));
+ else if (n_bytes == 2)
+ serialize_integer (m, clib_mem_unaligned (d, u16), sizeof (u16));
+ else if (n_bytes == 4)
+ serialize_integer (m, clib_mem_unaligned (d, u32), sizeof (u32));
+ else if (n_bytes == 8)
+ serialize (m, serialize_64, clib_mem_unaligned (d, u64));
+ else
+ ASSERT (0);
+ break;
+
+ case 's':
+ serialize_cstring (m, (char *) d);
+ if (n_bytes == 0)
+ n_bytes = strlen ((char *) d) + 1;
+ break;
+
+ case 'f':
+ if (n_bytes == 4)
+ serialize (m, serialize_f32, clib_mem_unaligned (d, f32));
+ else if (n_bytes == 8)
+ serialize (m, serialize_f64, clib_mem_unaligned (d, f64));
+ else
+ ASSERT (0);
+ break;
+
+ default:
+ ASSERT (0);
+ break;
+ }
+
+ p += 1 + n_digits;
+ d += n_bytes;
+ }
+}
+
+static void
+unserialize_elog_event (serialize_main_t * m, va_list * va)
+{
+ elog_main_t *em = va_arg (*va, elog_main_t *);
+ elog_event_t *e = va_arg (*va, elog_event_t *);
+ elog_event_type_t *t;
+ u8 *p, *d;
+
+ {
+ u16 tmp[2];
+
+ unserialize_integer (m, &tmp[0], sizeof (e->type));
+ unserialize_integer (m, &tmp[1], sizeof (e->track));
+
+ e->type = tmp[0];
+ e->track = tmp[1];
+
+ /* Make sure it fits. */
+ ASSERT (e->type == tmp[0]);
+ ASSERT (e->track == tmp[1]);
+ }
+
+ t = vec_elt_at_index (em->event_types, e->type);
+
+ unserialize (m, unserialize_f64, &e->time);
+
+ d = e->data;
+ p = (u8 *) t->format_args;
+
+ while (p && *p)
+ {
+ uword n_digits, n_bytes = 0;
+ u32 tmp;
+
+ n_digits = parse_2digit_decimal ((char *) p + 1, &n_bytes);
+
+ switch (p[0])
+ {
+ case 'i':
+ case 't':
+ case 'T':
+ if (n_bytes == 1)
+ {
+ unserialize_integer (m, &tmp, sizeof (u8));
+ d[0] = tmp;
+ }
+ else if (n_bytes == 2)
+ {
+ unserialize_integer (m, &tmp, sizeof (u16));
+ clib_mem_unaligned (d, u16) = tmp;
+ }
+ else if (n_bytes == 4)
+ {
+ unserialize_integer (m, &tmp, sizeof (u32));
+ clib_mem_unaligned (d, u32) = tmp;
+ }
+ else if (n_bytes == 8)
+ {
+ u64 x;
+ unserialize (m, unserialize_64, &x);
+ clib_mem_unaligned (d, u64) = x;
+ }
+ else
+ ASSERT (0);
+ break;
+
+ case 's':
+ {
+ char *t;
+ unserialize_cstring (m, &t);
+ if (n_bytes == 0)
+ n_bytes = strlen (t) + 1;
+ clib_memcpy (d, t, clib_min (n_bytes, vec_len (t)));
+ vec_free (t);
+ break;
+ }
+
+ case 'f':
+ if (n_bytes == 4)
+ {
+ f32 x;
+ unserialize (m, unserialize_f32, &x);
+ clib_mem_unaligned (d, f32) = x;
+ }
+ else if (n_bytes == 8)
+ {
+ f64 x;
+ unserialize (m, unserialize_f64, &x);
+ clib_mem_unaligned (d, f64) = x;
+ }
+ else
+ ASSERT (0);
+ break;
+
+ default:
+ ASSERT (0);
+ break;
+ }
+
+ p += 1 + n_digits;
+ d += n_bytes;
+ }
+}
+
+static void
+serialize_elog_event_type (serialize_main_t * m, va_list * va)
+{
+ elog_event_type_t *t = va_arg (*va, elog_event_type_t *);
+ int n = va_arg (*va, int);
+ int i, j;
+ for (i = 0; i < n; i++)
+ {
+ serialize_cstring (m, t[i].format);
+ serialize_cstring (m, t[i].format_args);
+ serialize_integer (m, t[i].type_index_plus_one,
+ sizeof (t->type_index_plus_one));
+ serialize_integer (m, t[i].n_enum_strings,
+ sizeof (t[i].n_enum_strings));
+ for (j = 0; j < t[i].n_enum_strings; j++)
+ serialize_cstring (m, t[i].enum_strings_vector[j]);
+ }
+}
+
+static void
+unserialize_elog_event_type (serialize_main_t * m, va_list * va)
+{
+ elog_event_type_t *t = va_arg (*va, elog_event_type_t *);
+ int n = va_arg (*va, int);
+ int i, j;
+ for (i = 0; i < n; i++)
+ {
+ unserialize_cstring (m, &t[i].format);
+ unserialize_cstring (m, &t[i].format_args);
+ unserialize_integer (m, &t[i].type_index_plus_one,
+ sizeof (t->type_index_plus_one));
+ unserialize_integer (m, &t[i].n_enum_strings,
+ sizeof (t[i].n_enum_strings));
+ vec_resize (t[i].enum_strings_vector, t[i].n_enum_strings);
+ for (j = 0; j < t[i].n_enum_strings; j++)
+ unserialize_cstring (m, &t[i].enum_strings_vector[j]);
+ }
+}
+
+static void
+serialize_elog_track (serialize_main_t * m, va_list * va)
+{
+ elog_track_t *t = va_arg (*va, elog_track_t *);
+ int n = va_arg (*va, int);
+ int i;
+ for (i = 0; i < n; i++)
+ {
+ serialize_cstring (m, t[i].name);
+ }
+}
+
+static void
+unserialize_elog_track (serialize_main_t * m, va_list * va)
+{
+ elog_track_t *t = va_arg (*va, elog_track_t *);
+ int n = va_arg (*va, int);
+ int i;
+ for (i = 0; i < n; i++)
+ {
+ unserialize_cstring (m, &t[i].name);
+ }
+}
+
+static void
+serialize_elog_time_stamp (serialize_main_t * m, va_list * va)
+{
+ elog_time_stamp_t *st = va_arg (*va, elog_time_stamp_t *);
+ serialize (m, serialize_64, st->os_nsec);
+ serialize (m, serialize_64, st->cpu);
+}
+
+static void
+unserialize_elog_time_stamp (serialize_main_t * m, va_list * va)
+{
+ elog_time_stamp_t *st = va_arg (*va, elog_time_stamp_t *);
+ unserialize (m, unserialize_64, &st->os_nsec);
+ unserialize (m, unserialize_64, &st->cpu);
+}
+
+static char *elog_serialize_magic = "elog v0";
+
+void
+serialize_elog_main (serialize_main_t * m, va_list * va)
+{
+ elog_main_t *em = va_arg (*va, elog_main_t *);
+ int flush_ring = va_arg (*va, int);
+ elog_event_t *e;
+
+ serialize_magic (m, elog_serialize_magic, strlen (elog_serialize_magic));
+
+ serialize_integer (m, em->event_ring_size, sizeof (u32));
+
+ elog_time_now (&em->serialize_time);
+ serialize (m, serialize_elog_time_stamp, &em->serialize_time);
+ serialize (m, serialize_elog_time_stamp, &em->init_time);
+
+ vec_serialize (m, em->event_types, serialize_elog_event_type);
+ vec_serialize (m, em->tracks, serialize_elog_track);
+ vec_serialize (m, em->string_table, serialize_vec_8);
+
+ /* Free old events (cached) in case they have changed. */
+ if (flush_ring)
+ {
+ vec_free (em->events);
+ elog_get_events (em);
+ }
+
+ serialize_integer (m, vec_len (em->events), sizeof (u32));
+
+ /* SMP logs can easily have local time paradoxes... */
+ vec_sort_with_function (em->events, elog_cmp);
+
+ vec_foreach (e, em->events) serialize (m, serialize_elog_event, em, e);
+}
+
+void
+unserialize_elog_main (serialize_main_t * m, va_list * va)
+{
+ elog_main_t *em = va_arg (*va, elog_main_t *);
+ uword i;
+ u32 rs;
+
+ unserialize_check_magic (m, elog_serialize_magic,
+ strlen (elog_serialize_magic));
+
+ unserialize_integer (m, &rs, sizeof (u32));
+ em->event_ring_size = rs;
+ elog_init (em, em->event_ring_size);
+
+ unserialize (m, unserialize_elog_time_stamp, &em->serialize_time);
+ unserialize (m, unserialize_elog_time_stamp, &em->init_time);
+ em->nsec_per_cpu_clock = elog_nsec_per_clock (em);
+
+ vec_unserialize (m, &em->event_types, unserialize_elog_event_type);
+ for (i = 0; i < vec_len (em->event_types); i++)
+ new_event_type (em, i);
+
+ vec_unserialize (m, &em->tracks, unserialize_elog_track);
+ vec_unserialize (m, &em->string_table, unserialize_vec_8);
+
+ {
+ u32 ne;
+ elog_event_t *e;
+
+ unserialize_integer (m, &ne, sizeof (u32));
+ vec_resize (em->events, ne);
+ vec_foreach (e, em->events)
+ unserialize (m, unserialize_elog_event, em, e);
+ }
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */