From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Thu, 25 Feb 2021 17:36:18 +0000 (-0500)
Subject: Fix: "Cleanup: clarify bytecode ownership"
X-Git-Tag: v2.13.0-rc1~368
X-Git-Url: http://git.lttng.org/?p=lttng-ust.git;a=commitdiff_plain;h=49cde654915a90aab1c1fb1cd02c829b4a3e4473

Fix: "Cleanup: clarify bytecode ownership"

The function lttng_event_notifier_enabler_attach_capture_bytecode
have also been adapted to this change.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: I6d8a984af829356329f933b552f9ada34387fd2c
---

diff --git a/liblttng-ust/lttng-events.c b/liblttng-ust/lttng-events.c
index 664f8b5d..acf5f3b6 100644
--- a/liblttng-ust/lttng-events.c
+++ b/liblttng-ust/lttng-events.c
@@ -1526,12 +1526,14 @@ int lttng_event_notifier_enabler_attach_filter_bytecode(
 
 int lttng_event_notifier_enabler_attach_capture_bytecode(
 		struct lttng_event_notifier_enabler *event_notifier_enabler,
-		struct lttng_ust_bytecode_node *bytecode)
+		struct lttng_ust_bytecode_node **bytecode)
 {
-	bytecode->enabler = lttng_event_notifier_enabler_as_enabler(
+	(*bytecode)->enabler = lttng_event_notifier_enabler_as_enabler(
 			event_notifier_enabler);
-	cds_list_add_tail(&bytecode->node,
+	cds_list_add_tail(&(*bytecode)->node,
 			&event_notifier_enabler->capture_bytecode_head);
+	/* Take ownership of bytecode */
+	*bytecode = NULL;
 	event_notifier_enabler->num_captures++;
 
 	lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group);
diff --git a/liblttng-ust/lttng-ust-abi.c b/liblttng-ust/lttng-ust-abi.c
index 8c0c4655..4703dc3d 100644
--- a/liblttng-ust/lttng-ust-abi.c
+++ b/liblttng-ust/lttng-ust-abi.c
@@ -719,7 +719,7 @@ long lttng_event_notifier_enabler_cmd(int objd, unsigned int cmd, unsigned long
 	case LTTNG_UST_CAPTURE:
 		return lttng_event_notifier_enabler_attach_capture_bytecode(
 			event_notifier_enabler,
-			(struct lttng_ust_bytecode_node *) arg);
+			(struct lttng_ust_bytecode_node **) arg);
 	case LTTNG_UST_ENABLE:
 		return lttng_event_notifier_enabler_enable(event_notifier_enabler);
 	case LTTNG_UST_DISABLE:
diff --git a/liblttng-ust/ust-events-internal.h b/liblttng-ust/ust-events-internal.h
index 1d8e914a..fc55cb03 100644
--- a/liblttng-ust/ust-events-internal.h
+++ b/liblttng-ust/ust-events-internal.h
@@ -233,7 +233,7 @@ int lttng_event_notifier_enabler_attach_filter_bytecode(
 LTTNG_HIDDEN
 int lttng_event_notifier_enabler_attach_capture_bytecode(
 		struct lttng_event_notifier_enabler *event_notifier_enabler,
-		struct lttng_ust_bytecode_node *bytecode);
+		struct lttng_ust_bytecode_node **bytecode);
 
 /*
  * Attach exclusion list to `struct lttng_event_notifier_enabler` and all