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malloc: Resolve compilation failure in NDEBUG mode 

In _int_free, the locked variable is not used if NDEBUG is defined.
This commit is contained in:
Florian Weimer 2017-08-31 14:55:11 +02:00
parent ecd0747df3
commit 24cffce736
2 changed files with 12 additions and 18 deletions
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5
ChangeLog
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@ -1,3 +1,8 @@
2017-08-31 Florian Weimer <fweimer@redhat.com>
* malloc/malloc.c (_int_free): Remove locked variable and related
asserts.
2017-08-31 H.J. Lu <hongjiu.lu@intel.com>
[BZ #22051]

25
malloc/malloc.c
View File

@ -4106,8 +4106,6 @@ _int_free (mstate av, mchunkptr p, int have_lock)
mchunkptr bck; /* misc temp for linking */
mchunkptr fwd; /* misc temp for linking */
int locked = 0;
size = chunksize (p);
/* Little security check which won't hurt performance: the
@ -4162,19 +4160,14 @@ _int_free (mstate av, mchunkptr p, int have_lock)
/* We might not have a lock at this point and concurrent modifications
of system_mem might have let to a false positive. Redo the test
after getting the lock. */
if (have_lock
|| ({ assert (locked == 0);
__libc_lock_lock (av->mutex);
locked = 1;
if (!have_lock
|| ({ __libc_lock_lock (av->mutex);
chunksize_nomask (chunk_at_offset (p, size)) <= 2 * SIZE_SZ
|| chunksize (chunk_at_offset (p, size)) >= av->system_mem;
}))
|| chunksize (chunk_at_offset (p, size)) >= av->system_mem;
}))
malloc_printerr ("free(): invalid next size (fast)");
if (! have_lock)
{
__libc_lock_unlock (av->mutex);
locked = 0;
}
__libc_lock_unlock (av->mutex);
}
free_perturb (chunk2mem(p), size - 2 * SIZE_SZ);
@ -4211,10 +4204,8 @@ _int_free (mstate av, mchunkptr p, int have_lock)
*/
else if (!chunk_is_mmapped(p)) {
if (! have_lock) {
if (!have_lock)
__libc_lock_lock (av->mutex);
locked = 1;
}
nextchunk = chunk_at_offset(p, size);
@ -4328,10 +4319,8 @@ _int_free (mstate av, mchunkptr p, int have_lock)
}
}
if (! have_lock) {
assert (locked);
if (!have_lock)
__libc_lock_unlock (av->mutex);
}
}
/*
If the chunk was allocated via mmap, release via munmap().