diff options
Diffstat (limited to 'sysdeps')
| -rw-r--r-- | sysdeps/unix/sysv/linux/setvmaname.c | 15 |
1 files changed, 10 insertions, 5 deletions
diff --git a/sysdeps/unix/sysv/linux/setvmaname.c b/sysdeps/unix/sysv/linux/setvmaname.c index 9960ab5917..cd6d571772 100644 --- a/sysdeps/unix/sysv/linux/setvmaname.c +++ b/sysdeps/unix/sysv/linux/setvmaname.c @@ -20,6 +20,7 @@ #include <setvmaname.h> #include <sys/prctl.h> #include <sysdep.h> +#include <elf/dl-tunables.h> /* If PR_SET_VMA_ANON_NAME is not supported by the kernel, prctl returns EINVAL. However, it also returns the same error for invalid argument. @@ -34,11 +35,15 @@ __set_vma_name (void *start, size_t len, const char *name) if (atomic_load_relaxed (&prctl_supported) == 0) return; - int r = INTERNAL_SYSCALL_CALL (prctl, PR_SET_VMA, PR_SET_VMA_ANON_NAME, - start, len, name); - if (r == 0 || r != -EINVAL) - return; - + /* Set the prctl as not supported to avoid checking the tunable on every + call. */ + if (TUNABLE_GET (glibc, mem, decorate_maps, int32_t, NULL) != 0) + { + int r = INTERNAL_SYSCALL_CALL (prctl, PR_SET_VMA, PR_SET_VMA_ANON_NAME, + start, len, name); + if (r == 0 || r != -EINVAL) + return; + } atomic_store_relaxed (&prctl_supported, 0); return; } |