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Resolve bootstrapping issues when embedded in FreeBSD libc.

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b2c0d6322d (Add witness, a simple online
locking validator.) caused a broad propagation of tsd throughout the
internal API, but tsd_fetch() was designed to fail prior to tsd
bootstrapping.  Fix this by splitting tsd_t into non-nullable tsd_t and
nullable tsdn_t, and modifying all internal APIs that do not critically
rely on tsd to take nullable pointers.  Furthermore, add the
tsd_booted_get() function so that tsdn_fetch() can probe whether tsd
bootstrapping is complete and return NULL if not.  All dangerous
conversions of nullable pointers are tsdn_tsd() calls that assert-fail
on invalid conversion.
This commit is contained in:
Jason Evans
2016-05-10 22:21:10 -07:00
parent 0c12dcabc5
commit c1e00ef2a6
34 changed files with 1709 additions and 1556 deletions
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12
src/mutex.c
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@@ -109,25 +109,25 @@ malloc_mutex_init(malloc_mutex_t *mutex, const char *name, witness_rank_t rank)
}
void
malloc_mutex_prefork(tsd_t *tsd, malloc_mutex_t *mutex)
malloc_mutex_prefork(tsdn_t *tsdn, malloc_mutex_t *mutex)
{
malloc_mutex_lock(tsd, mutex);
malloc_mutex_lock(tsdn, mutex);
}
void
malloc_mutex_postfork_parent(tsd_t *tsd, malloc_mutex_t *mutex)
malloc_mutex_postfork_parent(tsdn_t *tsdn, malloc_mutex_t *mutex)
{
malloc_mutex_unlock(tsd, mutex);
malloc_mutex_unlock(tsdn, mutex);
}
void
malloc_mutex_postfork_child(tsd_t *tsd, malloc_mutex_t *mutex)
malloc_mutex_postfork_child(tsdn_t *tsdn, malloc_mutex_t *mutex)
{
#ifdef JEMALLOC_MUTEX_INIT_CB
malloc_mutex_unlock(tsd, mutex);
malloc_mutex_unlock(tsdn, mutex);
#else
if (malloc_mutex_init(mutex, mutex->witness.name,
mutex->witness.rank)) {