1 /* SPDX-License-Identifier: BSD-3-Clause
2 * Copyright(C) 2020 Marvell International Ltd.
10 #include <rte_common.h>
11 #include <rte_errno.h>
12 #include <rte_lcore.h>
13 #include <rte_per_lcore.h>
14 #include <rte_string_fns.h>
16 #include "eal_trace.h"
18 RTE_DEFINE_PER_LCORE(volatile int, trace_point_sz);
19 static RTE_DEFINE_PER_LCORE(char, ctf_field[TRACE_CTF_FIELD_SIZE]);
20 static RTE_DEFINE_PER_LCORE(int, ctf_count);
22 static struct trace_point_head tp_list = STAILQ_HEAD_INITIALIZER(tp_list);
23 static struct trace trace;
26 rte_trace_is_enabled(void)
32 trace_mode_set(rte_trace_point_t *trace, enum rte_trace_mode mode)
34 if (mode == RTE_TRACE_MODE_OVERWRITE)
35 __atomic_and_fetch(trace, ~__RTE_TRACE_FIELD_ENABLE_DISCARD,
38 __atomic_or_fetch(trace, __RTE_TRACE_FIELD_ENABLE_DISCARD,
43 rte_trace_mode_set(enum rte_trace_mode mode)
45 struct trace_point *tp;
47 if (!rte_trace_is_enabled())
50 STAILQ_FOREACH(tp, &tp_list, next)
51 trace_mode_set(tp->handle, mode);
57 rte_trace_mode rte_trace_mode_get(void)
63 trace_point_is_invalid(rte_trace_point_t *t)
65 return (t == NULL) || (trace_id_get(t) >= trace.nb_trace_points);
69 rte_trace_point_is_enabled(rte_trace_point_t *trace)
73 if (trace_point_is_invalid(trace))
76 val = __atomic_load_n(trace, __ATOMIC_ACQUIRE);
77 return (val & __RTE_TRACE_FIELD_ENABLE_MASK) != 0;
81 rte_trace_point_enable(rte_trace_point_t *trace)
83 if (trace_point_is_invalid(trace))
86 __atomic_or_fetch(trace, __RTE_TRACE_FIELD_ENABLE_MASK,
92 rte_trace_point_disable(rte_trace_point_t *trace)
94 if (trace_point_is_invalid(trace))
97 __atomic_and_fetch(trace, ~__RTE_TRACE_FIELD_ENABLE_MASK,
103 rte_trace_pattern(const char *pattern, bool enable)
105 struct trace_point *tp;
106 int rc = 0, found = 0;
108 STAILQ_FOREACH(tp, &tp_list, next) {
109 if (fnmatch(pattern, tp->name, 0) == 0) {
111 rc = rte_trace_point_enable(tp->handle);
113 rc = rte_trace_point_disable(tp->handle);
124 rte_trace_regexp(const char *regex, bool enable)
126 struct trace_point *tp;
127 int rc = 0, found = 0;
130 if (regcomp(&r, regex, 0) != 0)
133 STAILQ_FOREACH(tp, &tp_list, next) {
134 if (regexec(&r, tp->name, 0, NULL, 0) == 0) {
136 rc = rte_trace_point_enable(tp->handle);
138 rc = rte_trace_point_disable(tp->handle);
150 rte_trace_point_lookup(const char *name)
152 struct trace_point *tp;
157 STAILQ_FOREACH(tp, &tp_list, next)
158 if (strncmp(tp->name, name, TRACE_POINT_NAME_SIZE) == 0)
165 __rte_trace_point_register(rte_trace_point_t *handle, const char *name,
166 void (*register_fn)(void))
168 char *field = RTE_PER_LCORE(ctf_field);
169 struct trace_point *tp;
172 /* Sanity checks of arguments */
173 if (name == NULL || register_fn == NULL || handle == NULL) {
174 trace_err("invalid arguments");
179 /* Check the size of the trace point object */
180 RTE_PER_LCORE(trace_point_sz) = 0;
181 RTE_PER_LCORE(ctf_count) = 0;
183 if (RTE_PER_LCORE(trace_point_sz) == 0) {
184 trace_err("missing rte_trace_emit_header() in register fn");
189 /* Is size overflowed */
190 if (RTE_PER_LCORE(trace_point_sz) > UINT16_MAX) {
191 trace_err("trace point size overflowed");
196 /* Are we running out of space to store trace points? */
197 if (trace.nb_trace_points > UINT16_MAX) {
198 trace_err("trace point exceeds the max count");
203 /* Get the size of the trace point */
204 sz = RTE_PER_LCORE(trace_point_sz);
205 tp = calloc(1, sizeof(struct trace_point));
207 trace_err("fail to allocate trace point memory");
212 /* Initialize the trace point */
213 if (rte_strscpy(tp->name, name, TRACE_POINT_NAME_SIZE) < 0) {
214 trace_err("name is too long");
219 /* Copy the field data for future use */
220 if (rte_strscpy(tp->ctf_field, field, TRACE_CTF_FIELD_SIZE) < 0) {
221 trace_err("CTF field size is too long");
226 /* Clear field memory for the next event */
227 memset(field, 0, TRACE_CTF_FIELD_SIZE);
229 /* Form the trace handle */
231 *handle |= trace.nb_trace_points << __RTE_TRACE_FIELD_ID_SHIFT;
233 trace.nb_trace_points++;
236 /* Add the trace point at tail */
237 STAILQ_INSERT_TAIL(&tp_list, tp, next);
238 __atomic_thread_fence(__ATOMIC_RELEASE);
245 if (trace.register_errno == 0)
246 trace.register_errno = rte_errno;