@@ -80,6 +80,7 @@ libsupport-routines = \
support_select_modifies_timeout \
support_select_normalizes_timeout \
support_set_small_thread_stack_size \
+ support_set_vma_name \
support_shared_allocate \
support_small_stack_thread_attribute \
support_socket_so_timestamp_time64 \
@@ -235,6 +235,10 @@ void support_stack_free (struct support_stack *stack);
The returned value is the lowest file descriptor number. */
int support_open_dev_null_range (int num, int flags, mode_t mode);
+
+/* Check if kernel supports set VMA range name. */
+extern bool support_set_vma_name (void);
+
__END_DECLS
#endif /* SUPPORT_H */
new file mode 100644
@@ -0,0 +1,49 @@
+/* Check if kernel supports set VMA range name.
+ Copyright (C) 2023 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C 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; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C 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 the GNU C Library; if not, see
+ <https://www.gnu.org/licenses/>. */
+
+#include <support/check.h>
+#include <support/support.h>
+#include <support/xunistd.h>
+#include <sys/mman.h>
+#ifdef __linux__
+# include <sys/prctl.h>
+#endif
+
+bool
+support_set_vma_name (void)
+{
+#ifdef __linux__
+ size_t size = sysconf (_SC_PAGESIZE);
+ if (size == -1)
+ FAIL_EXIT1 ("sysconf (_SC_PAGESIZE): %m\n");
+
+ void *vma = xmmap (0,
+ size,
+ PROT_NONE,
+ MAP_PRIVATE|MAP_ANONYMOUS|MAP_NORESERVE,
+ -1);
+
+ int r = prctl (PR_SET_VMA, PR_SET_VMA_ANON_NAME, vma, size, "vmaname");
+
+ xmunmap (vma, size);
+
+ return r == 0;
+#else
+ return false;
+#endif
+}