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| author | Florian Weimer <fweimer@redhat.com> | 2016-08-03 16:15:38 +0200 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2016-08-03 16:15:38 +0200 |
| commit | a2ff21f825adb8821eeb6145197fa8b9a8a60a58 (patch) | |
| tree | 65f74b90eb0a005a278f80586b0ee001d358021b /nptl | |
| parent | 5bc17330eb7667b96fee8baf3729c3310fa28b40 (diff) | |
| download | glibc-a2ff21f825adb8821eeb6145197fa8b9a8a60a58.tar.gz | |
elf: Avoid using memalign for TLS allocations [BZ #17730]
Instead of a flag which indicates the pointer can be freed, dtv_t
now includes the pointer which should be freed. Due to padding,
the size of dtv_t does not increase.
To avoid using memalign, the new allocate_dtv_entry function
allocates a sufficiently large buffer so that a sub-buffer
can be found in it which starts with an aligned pointer. Both
the aligned and original pointers are kept, the latter for calling
free later.
Diffstat (limited to 'nptl')
| -rw-r--r-- | nptl/allocatestack.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/nptl/allocatestack.c b/nptl/allocatestack.c index 6b42b11d5a..60b34dc6fc 100644 --- a/nptl/allocatestack.c +++ b/nptl/allocatestack.c @@ -245,9 +245,7 @@ get_cached_stack (size_t *sizep, void **memp) /* Clear the DTV. */ dtv_t *dtv = GET_DTV (TLS_TPADJ (result)); for (size_t cnt = 0; cnt < dtv[-1].counter; ++cnt) - if (! dtv[1 + cnt].pointer.is_static - && dtv[1 + cnt].pointer.val != TLS_DTV_UNALLOCATED) - free (dtv[1 + cnt].pointer.val); + free (dtv[1 + cnt].pointer.to_free); memset (dtv, '\0', (dtv[-1].counter + 1) * sizeof (dtv_t)); /* Re-initialize the TLS. */ |