X-Git-Url: http://git.droids-corp.org/?a=blobdiff_plain;f=lib%2Flibrte_eal%2Fcommon%2Feal_common_trace.c;h=24e27387b189d8df11ece6def06de269f5e94c2c;hb=400d307e1a60;hp=875553d7e5f11f759e4b311f33edd982b656a0f0;hpb=970a407648b39944b1fb15a5ebf4bc9f711f3690;p=dpdk.git

diff --git a/lib/librte_eal/common/eal_common_trace.c b/lib/librte_eal/common/eal_common_trace.c
index 875553d7e5..24e27387b1 100644
--- a/lib/librte_eal/common/eal_common_trace.c
+++ b/lib/librte_eal/common/eal_common_trace.c
@@ -17,8 +17,7 @@
 
 RTE_DEFINE_PER_LCORE(volatile int, trace_point_sz);
 RTE_DEFINE_PER_LCORE(void *, trace_mem);
-static RTE_DEFINE_PER_LCORE(char, ctf_field[TRACE_CTF_FIELD_SIZE]);
-static RTE_DEFINE_PER_LCORE(int, ctf_count);
+static RTE_DEFINE_PER_LCORE(char *, ctf_field);
 
 static struct trace_point_head tp_list = STAILQ_HEAD_INITIALIZER(tp_list);
 static struct trace trace = { .args = STAILQ_HEAD_INITIALIZER(trace.args), };
@@ -101,7 +100,7 @@ eal_trace_fini(void)
 {
 	if (!rte_trace_is_enabled())
 		return;
-	trace_mem_per_thread_free();
+	trace_mem_free();
 	trace_metadata_destroy();
 	eal_trace_args_free();
 }
@@ -370,51 +369,92 @@ fail:
 	rte_spinlock_unlock(&trace->lock);
 }
 
+static void
+trace_mem_per_thread_free_unlocked(struct thread_mem_meta *meta)
+{
+	if (meta->area == TRACE_AREA_HUGEPAGE)
+		eal_free_no_trace(meta->mem);
+	else if (meta->area == TRACE_AREA_HEAP)
+		free(meta->mem);
+}
+
 void
 trace_mem_per_thread_free(void)
+{
+	struct trace *trace = trace_obj_get();
+	struct __rte_trace_header *header;
+	uint32_t count;
+
+	header = RTE_PER_LCORE(trace_mem);
+	if (header == NULL)
+		return;
+
+	rte_spinlock_lock(&trace->lock);
+	for (count = 0; count < trace->nb_trace_mem_list; count++) {
+		if (trace->lcore_meta[count].mem == header)
+			break;
+	}
+	if (count != trace->nb_trace_mem_list) {
+		struct thread_mem_meta *meta = &trace->lcore_meta[count];
+
+		trace_mem_per_thread_free_unlocked(meta);
+		if (count != trace->nb_trace_mem_list - 1) {
+			memmove(meta, meta + 1,
+				sizeof(*meta) *
+				 (trace->nb_trace_mem_list - count - 1));
+		}
+		trace->nb_trace_mem_list--;
+	}
+	rte_spinlock_unlock(&trace->lock);
+}
+
+void
+trace_mem_free(void)
 {
 	struct trace *trace = trace_obj_get();
 	uint32_t count;
-	void *mem;
 
 	if (!rte_trace_is_enabled())
 		return;
 
 	rte_spinlock_lock(&trace->lock);
 	for (count = 0; count < trace->nb_trace_mem_list; count++) {
-		mem = trace->lcore_meta[count].mem;
-		if (trace->lcore_meta[count].area == TRACE_AREA_HUGEPAGE)
-			eal_free_no_trace(mem);
-		else if (trace->lcore_meta[count].area == TRACE_AREA_HEAP)
-			free(mem);
+		trace_mem_per_thread_free_unlocked(&trace->lcore_meta[count]);
 	}
+	trace->nb_trace_mem_list = 0;
 	rte_spinlock_unlock(&trace->lock);
 }
 
 void
 __rte_trace_point_emit_field(size_t sz, const char *in, const char *datatype)
 {
-	char *field = RTE_PER_LCORE(ctf_field);
-	int count = RTE_PER_LCORE(ctf_count);
-	size_t size;
+	char *field;
+	char *fixup;
 	int rc;
 
-	size = RTE_MAX(0, TRACE_CTF_FIELD_SIZE - 1 - count);
-	RTE_PER_LCORE(trace_point_sz) += sz;
-	rc = snprintf(RTE_PTR_ADD(field, count), size, "%s %s;", datatype, in);
-	if (rc <= 0 || (size_t)rc >= size) {
+	fixup = trace_metadata_fixup_field(in);
+	if (fixup != NULL)
+		in = fixup;
+	rc = asprintf(&field, "%s        %s %s;\n",
+		RTE_PER_LCORE(ctf_field) != NULL ?
+			RTE_PER_LCORE(ctf_field) : "",
+		datatype, in);
+	free(RTE_PER_LCORE(ctf_field));
+	free(fixup);
+	if (rc == -1) {
 		RTE_PER_LCORE(trace_point_sz) = 0;
-		trace_crit("CTF field is too long");
+		RTE_PER_LCORE(ctf_field) = NULL;
+		trace_crit("could not allocate CTF field");
 		return;
 	}
-	RTE_PER_LCORE(ctf_count) += rc;
+	RTE_PER_LCORE(trace_point_sz) += sz;
+	RTE_PER_LCORE(ctf_field) = field;
 }
 
 int
 __rte_trace_point_register(rte_trace_point_t *handle, const char *name,
 		void (*register_fn)(void))
 {
-	char *field = RTE_PER_LCORE(ctf_field);
 	struct trace_point *tp;
 	uint16_t sz;
 
@@ -427,7 +467,6 @@ __rte_trace_point_register(rte_trace_point_t *handle, const char *name,
 
 	/* Check the size of the trace point object */
 	RTE_PER_LCORE(trace_point_sz) = 0;
-	RTE_PER_LCORE(ctf_count) = 0;
 	register_fn();
 	if (RTE_PER_LCORE(trace_point_sz) == 0) {
 		trace_err("missing rte_trace_emit_header() in register fn");
@@ -465,15 +504,11 @@ __rte_trace_point_register(rte_trace_point_t *handle, const char *name,
 		goto free;
 	}
 
-	/* Copy the field data for future use */
-	if (rte_strscpy(tp->ctf_field, field, TRACE_CTF_FIELD_SIZE) < 0) {
-		trace_err("CTF field size is too long");
-		rte_errno = E2BIG;
-		goto free;
-	}
-
-	/* Clear field memory for the next event */
-	memset(field, 0, TRACE_CTF_FIELD_SIZE);
+	/* Copy the accumulated fields description and clear it for the next
+	 * trace point.
+	 */
+	tp->ctf_field = RTE_PER_LCORE(ctf_field);
+	RTE_PER_LCORE(ctf_field) = NULL;
 
 	/* Form the trace handle */
 	*handle = sz;