migration/dirtyrate: Silence warning about strcpy() on OpenBSD

The linker on OpenBSD complains:

 ld: warning: dirtyrate.c:447 (../src/migration/dirtyrate.c:447)(...):
 warning: strcpy() is almost always misused, please use strlcpy()

It's currently not a real problem in this case since both arrays
have the same size (256 bytes). But just in case somebody changes
the size of the source array in the future, let's better play safe
and use g_strlcpy() here instead, with an additional check that the
string has been copied as a whole.

Signed-off-by: Thomas Huth <thuth@redhat.com>
Reviewed-by: Hyman Huang <yong.huang@smartx.com>
Link: https://lore.kernel.org/r/20241022063402.184213-1-thuth@redhat.com
[peterx: Fix over-80 chars]
Signed-off-by: Peter Xu <peterx@redhat.com>

diff --git a/migration/dirtyrate.c b/migration/dirtyrate.c
index a74a6aeb56a3db99cc58f8aa094076a3ba05ef2e..f7e86686fc7ce425877341c15bf56fa817178ccf 100644 (file)
--- a/migration/dirtyrate.c
+++ b/migration/dirtyrate.c
@@ -437,6 +437,7 @@ static void get_ramblock_dirty_info(RAMBlock *block,
                                     struct DirtyRateConfig *config)
 {
     uint64_t sample_pages_per_gigabytes = config->sample_pages_per_gigabytes;
+    gsize len;
 
     /* Right shift 30 bits to calc ramblock size in GB */
     info->sample_pages_count = (qemu_ram_get_used_length(block) *
@@ -445,7 +446,9 @@ static void get_ramblock_dirty_info(RAMBlock *block,
     info->ramblock_pages = qemu_ram_get_used_length(block) >>
                            qemu_target_page_bits();
     info->ramblock_addr = qemu_ram_get_host_addr(block);
-    strcpy(info->idstr, qemu_ram_get_idstr(block));
+    len = g_strlcpy(info->idstr, qemu_ram_get_idstr(block),
+                    sizeof(info->idstr));
+    g_assert(len < sizeof(info->idstr));
 }
 
 static void free_ramblock_dirty_info(struct RamblockDirtyInfo *infos, int count)