From: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Date: Tue, 30 Mar 2021 16:07:51 +0000 (-0400)
Subject: Fix: tls-compat with hidden ring buffer context
X-Git-Tag: v2.13.0-rc1~175
X-Git-Url: http://git.lttng.org./?a=commitdiff_plain;h=f37bd90482562c086af4070caf1f218c832f5007;p=lttng-ust.git

Fix: tls-compat with hidden ring buffer context

There are additional missing URCU_TLS() accessors in the refactoring of
the ring buffer context. Moreover, when indexing an array, it must be
done outside of the URCU_TLS() accessor.

Signed-off-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Change-Id: Ief9d31e26e16fa5decf797b23ed6304b5a8c79ca
---

diff --git a/liblttng-ust/lttng-ring-buffer-client.h b/liblttng-ust/lttng-ring-buffer-client.h
index fb7ba255..dc3dd88f 100644
--- a/liblttng-ust/lttng-ring-buffer-client.h
+++ b/liblttng-ust/lttng-ring-buffer-client.h
@@ -732,7 +732,7 @@ int lttng_event_reserve(struct lttng_ust_lib_ring_buffer_ctx *ctx)
 	if (nesting < 0)
 		return -EPERM;
 
-	private_ctx = &URCU_TLS(private_ctx_stack[nesting]);
+	private_ctx = &URCU_TLS(private_ctx_stack)[nesting];
 	memset(private_ctx, 0, sizeof(*private_ctx));
 	private_ctx->pub = ctx;
 	private_ctx->chan = lttng_chan->priv->rb_chan;
diff --git a/liblttng-ust/lttng-ring-buffer-metadata-client.h b/liblttng-ust/lttng-ring-buffer-metadata-client.h
index 8a0fdc5c..f4d1362a 100644
--- a/liblttng-ust/lttng-ring-buffer-metadata-client.h
+++ b/liblttng-ust/lttng-ring-buffer-metadata-client.h
@@ -248,10 +248,10 @@ int lttng_event_reserve(struct lttng_ust_lib_ring_buffer_ctx *ctx)
 {
 	int ret;
 
-	memset(&private_ctx, 0, sizeof(private_ctx));
-	private_ctx.pub = ctx;
-	private_ctx.chan = ctx->client_priv;
-	ctx->priv = &private_ctx;
+	memset(&URCU_TLS(private_ctx), 0, sizeof(struct lttng_ust_lib_ring_buffer_ctx_private));
+	URCU_TLS(private_ctx).pub = ctx;
+	URCU_TLS(private_ctx).chan = ctx->client_priv;
+	ctx->priv = &URCU_TLS(private_ctx);
 	ret = lib_ring_buffer_reserve(&client_config, ctx, NULL);
 	if (ret)
 		return ret;