[release/10.0] [mono][hotreload] Make the runtime ignore an update if it is an empty one. (#120334)

github-actions[bot] · thaystg · Copilot · web-flow · commit 1e4efee18634 · 2025-10-04T00:45:17.000Z
* If we receive an empty update we should just ignore it.

* Update src/mono/mono/component/hot_reload.c

Co-authored-by: Copilot &lt;175728472+Copilot@users.noreply.github.com&gt;

---------

Co-authored-by: Thays Grazia &lt;thtaglia@microsoft.com&gt;
Co-authored-by: Thays Grazia &lt;thaystg@gmail.com&gt;
Co-authored-by: Copilot &lt;175728472+Copilot@users.noreply.github.com&gt;
diff --git a/src/mono/mono/component/hot_reload.c b/src/mono/mono/component/hot_reload.c
@@ -2381,9 +2381,11 @@ hot_reload_apply_changes (int origin, MonoImage *image_base, gconstpointer dmeta
 	if (!assembly_update_supported (image_base, error)) {
 		return;
 	}
-
+	if (dmeta_bytes == 0 && dil_bytes_orig == 0) // we may receive empty updates
+	{
+		return;
+	}
         static int first_origin = -1;
-
         if (first_origin < 0) {
                 first_origin = origin;
         }

Original file line number	Diff line number	Diff line change
`@@ -2381,9 +2381,11 @@ hot_reload_apply_changes (int origin, MonoImage *image_base, gconstpointer dmeta`
`2381`	`2381`	`if (!assembly_update_supported (image_base, error)) {`
`2382`	`2382`	`return;`
`2383`	`2383`	`}`
`2384`		`-`
	`2384`	`+ if (dmeta_bytes == 0 && dil_bytes_orig == 0) // we may receive empty updates`
	`2385`	`+ {`
	`2386`	`+ return;`
	`2387`	`+ }`
`2385`	`2388`	`static int first_origin = -1;`
`2386`		`-`
`2387`	`2389`	`if (first_origin < 0) {`
`2388`	`2390`	`first_origin = origin;`
`2389`	`2391`	`}`