callstack context: use delimiter when stack is incomplete

[lttng-modules.git] / lttng-context-tid.c

diff --git a/lttng-context-tid.c b/lttng-context-tid.c
index 4e974f8d8e78c35b0fea2d93e98ed00152f4c0cd..913c6d5b7e06c904e01ba86942f5737b2acdedcf 100644 (file)
--- a/lttng-context-tid.c
+++ b/lttng-context-tid.c
@@ -1,26 +1,39 @@
 /*
- * (C) Copyright       2009-2011 -
- *             Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
+ * lttng-context-tid.c
  *
  * LTTng TID context.
  *
- * Dual LGPL v2.1/GPL v2 license.
+ * 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
  */
 
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/sched.h>
-#include "ltt-events.h"
-#include "wrapper/ringbuffer/frontend_types.h"
-#include "wrapper/vmalloc.h"
-#include "ltt-tracer.h"
+#include <lttng-events.h>
+#include <wrapper/ringbuffer/frontend_types.h>
+#include <wrapper/vmalloc.h>
+#include <lttng-tracer.h>
 
 static
 size_t tid_get_size(size_t offset)
 {
        size_t size = 0;
 
-       size += lib_ring_buffer_align(offset, ltt_alignof(pid_t));
+       size += lib_ring_buffer_align(offset, lttng_alignof(pid_t));
        size += sizeof(pid_t);
        return size;
 }
@@ -28,38 +41,50 @@ size_t tid_get_size(size_t offset)
 static
 void tid_record(struct lttng_ctx_field *field,
                 struct lib_ring_buffer_ctx *ctx,
-                struct ltt_channel *chan)
+                struct lttng_channel *chan)
 {
        pid_t tid;
 
        tid = task_pid_nr(current);
-       lib_ring_buffer_align_ctx(ctx, ltt_alignof(tid));
+       lib_ring_buffer_align_ctx(ctx, lttng_alignof(tid));
        chan->ops->event_write(ctx, &tid, sizeof(tid));
 }
 
+static
+void tid_get_value(struct lttng_ctx_field *field,
+               struct lttng_probe_ctx *lttng_probe_ctx,
+               union lttng_ctx_value *value)
+{
+       pid_t tid;
+
+       tid = task_pid_nr(current);
+       value->s64 = tid;
+}
+
 int lttng_add_tid_to_ctx(struct lttng_ctx **ctx)
 {
        struct lttng_ctx_field *field;
-       int ret;
 
        field = lttng_append_context(ctx);
        if (!field)
-               return ret;
+               return -ENOMEM;
+       if (lttng_find_context(*ctx, "tid")) {
+               lttng_remove_context_field(ctx, field);
+               return -EEXIST;
+       }
        field->event_field.name = "tid";
        field->event_field.type.atype = atype_integer;
        field->event_field.type.u.basic.integer.size = sizeof(pid_t) * CHAR_BIT;
-       field->event_field.type.u.basic.integer.alignment = ltt_alignof(pid_t) * CHAR_BIT;
-       field->event_field.type.u.basic.integer.signedness = is_signed_type(pid_t);
+       field->event_field.type.u.basic.integer.alignment = lttng_alignof(pid_t) * CHAR_BIT;
+       field->event_field.type.u.basic.integer.signedness = lttng_is_signed_type(pid_t);
        field->event_field.type.u.basic.integer.reverse_byte_order = 0;
        field->event_field.type.u.basic.integer.base = 10;
        field->event_field.type.u.basic.integer.encoding = lttng_encode_none;
        field->get_size = tid_get_size;
        field->record = tid_record;
+       field->get_value = tid_get_value;
+       lttng_context_update(*ctx);
        wrapper_vmalloc_sync_all();
        return 0;
 }
 EXPORT_SYMBOL_GPL(lttng_add_tid_to_ctx);
-
-MODULE_LICENSE("GPL and additional rights");
-MODULE_AUTHOR("Mathieu Desnoyers");
-MODULE_DESCRIPTION("Linux Trace Toolkit TID Context");