/*
- * lttng-context-procname.c
- *
- * LTTng UST procname context.
+ * SPDX-License-Identifier: LGPL-2.1-only
*
* Copyright (C) 2009-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
*
- * This library is free software; you can redistribute it and/or
- * modify it under the terms of the GNU Lesser General Public
- * License as published by the Free Software Foundation; only
- * version 2.1 of the License.
- *
- * This library is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- * Lesser General Public License for more details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with this library; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+ * LTTng UST procname context.
*/
#define _LGPL_SOURCE
+#include <stddef.h>
#include <lttng/ust-events.h>
#include <lttng/ust-tracer.h>
-#include <lttng/ringbuffer-config.h>
+#include <lttng/ringbuffer-context.h>
#include <urcu/tls-compat.h>
#include <assert.h>
#include "compat.h"
+#include "lttng-tracer-core.h"
+
+#include "context-internal.h"
/* Maximum number of nesting levels for the procname cache. */
#define PROCNAME_NESTING_MAX 2
static DEFINE_URCU_TLS(int, procname_nesting);
static inline
-char *wrapper_getprocname(void)
+const char *wrapper_getprocname(void)
{
int nesting = CMM_LOAD_SHARED(URCU_TLS(procname_nesting));
CMM_STORE_SHARED(URCU_TLS(procname_nesting), nesting + 1);
/* Increment nesting before updating cache. */
cmm_barrier();
- lttng_ust_getprocname(URCU_TLS(cached_procname)[nesting]);
- URCU_TLS(cached_procname)[nesting][LTTNG_UST_PROCNAME_LEN - 1] = '\0';
+ lttng_pthread_getname_np(URCU_TLS(cached_procname)[nesting], LTTNG_UST_ABI_PROCNAME_LEN);
+ URCU_TLS(cached_procname)[nesting][LTTNG_UST_ABI_PROCNAME_LEN - 1] = '\0';
/* Decrement nesting after updating cache. */
cmm_barrier();
CMM_STORE_SHARED(URCU_TLS(procname_nesting), nesting);
}
/* Reset should not be called from a signal handler. */
-void lttng_context_procname_reset(void)
+void lttng_ust_context_procname_reset(void)
{
CMM_STORE_SHARED(URCU_TLS(cached_procname)[1][0], '\0');
CMM_STORE_SHARED(URCU_TLS(procname_nesting), 1);
}
static
-size_t procname_get_size(struct lttng_ctx_field *field, size_t offset)
+size_t procname_get_size(void *priv __attribute__((unused)),
+ size_t offset __attribute__((unused)))
{
- return LTTNG_UST_PROCNAME_LEN;
+ return LTTNG_UST_ABI_PROCNAME_LEN;
}
static
-void procname_record(struct lttng_ctx_field *field,
+void procname_record(void *priv __attribute__((unused)),
struct lttng_ust_lib_ring_buffer_ctx *ctx,
- struct lttng_channel *chan)
+ struct lttng_ust_channel_buffer *chan)
{
- char *procname;
+ const char *procname;
procname = wrapper_getprocname();
- chan->ops->event_write(ctx, procname, LTTNG_UST_PROCNAME_LEN);
+ chan->ops->event_write(ctx, procname, LTTNG_UST_ABI_PROCNAME_LEN, 1);
}
static
-void procname_get_value(struct lttng_ctx_field *field,
- struct lttng_ctx_value *value)
+void procname_get_value(void *priv __attribute__((unused)),
+ struct lttng_ust_ctx_value *value)
{
value->u.str = wrapper_getprocname();
}
-int lttng_add_procname_to_ctx(struct lttng_ctx **ctx)
+static const struct lttng_ust_ctx_field *ctx_field = lttng_ust_static_ctx_field(
+ lttng_ust_static_event_field("procname",
+ lttng_ust_static_type_array_text(LTTNG_UST_ABI_PROCNAME_LEN),
+ false, false),
+ procname_get_size,
+ procname_record,
+ procname_get_value,
+ NULL, NULL);
+
+int lttng_add_procname_to_ctx(struct lttng_ust_ctx **ctx)
{
- struct lttng_ctx_field *field;
-
- field = lttng_append_context(ctx);
- if (!field)
- return -ENOMEM;
- if (lttng_find_context(*ctx, "procname")) {
- lttng_remove_context_field(ctx, field);
- return -EEXIST;
+ int ret;
+
+ if (lttng_find_context(*ctx, ctx_field->event_field->name)) {
+ ret = -EEXIST;
+ goto error_find_context;
}
- field->event_field.name = "procname";
- field->event_field.type.atype = atype_array;
- field->event_field.type.u.array.elem_type.atype = atype_integer;
- field->event_field.type.u.array.elem_type.u.basic.integer.size = sizeof(char) * CHAR_BIT;
- field->event_field.type.u.array.elem_type.u.basic.integer.alignment = lttng_alignof(char) * CHAR_BIT;
- field->event_field.type.u.array.elem_type.u.basic.integer.signedness = lttng_is_signed_type(char);
- field->event_field.type.u.array.elem_type.u.basic.integer.reverse_byte_order = 0;
- field->event_field.type.u.array.elem_type.u.basic.integer.base = 10;
- field->event_field.type.u.array.elem_type.u.basic.integer.encoding = lttng_encode_UTF8;
- field->event_field.type.u.array.length = LTTNG_UST_PROCNAME_LEN;
- field->get_size = procname_get_size;
- field->record = procname_record;
- field->get_value = procname_get_value;
- lttng_context_update(*ctx);
+ ret = lttng_ust_context_append(ctx, ctx_field);
+ if (ret)
+ return ret;
return 0;
+
+error_find_context:
+ return ret;
}
/*
projects / lttng-ust.git / blobdiff