Fix huge_palloc() regression.

Split arena_choose() into arena_[i]choose() and use arena_ichoose() for
arena lookup during internal allocation.  This fixes huge_palloc() so
that it always succeeds during extent node allocation.

This regression was introduced by
66cd953514 (Do not allocate metadata via
non-auto arenas, nor tcaches.).

include/jemalloc/internal/jemalloc_internal.h.in

@@ -550,7 +550,9 @@ size_t	s2u_compute(size_t size);
 size_t	s2u_lookup(size_t size);
 size_t	s2u(size_t size);
 size_t	sa2u(size_t size, size_t alignment);
-arena_t	*arena_choose(tsd_t *tsd, arena_t *arena, bool internal);
+arena_t	*arena_choose_impl(tsd_t *tsd, arena_t *arena, bool internal);
+arena_t	*arena_choose(tsd_t *tsd, arena_t *arena);
+arena_t	*arena_ichoose(tsd_t *tsd, arena_t *arena);
 arena_tdata_t	*arena_tdata_get(tsd_t *tsd, unsigned ind,
     bool refresh_if_missing);
 arena_t	*arena_get(tsd_t *tsd, unsigned ind, bool init_if_missing);
@@ -788,7 +790,7 @@ sa2u(size_t size, size_t alignment)
 
 /* Choose an arena based on a per-thread value. */
 JEMALLOC_INLINE arena_t *
-arena_choose(tsd_t *tsd, arena_t *arena, bool internal)
+arena_choose_impl(tsd_t *tsd, arena_t *arena, bool internal)
 {
 	arena_t *ret;
 
@@ -802,6 +804,24 @@ arena_choose(tsd_t *tsd, arena_t *arena, bool internal)
 	return (ret);
 }
 
+JEMALLOC_INLINE arena_t *
+arena_choose(tsd_t *tsd, arena_t *arena)
+{
+
+	return (arena_choose_impl(tsd, arena, false));
+}
+
+JEMALLOC_INLINE arena_t *
+arena_ichoose(tsd_t *tsd, arena_t *arena)
+{
+
+	assert(tsd != NULL || arena != NULL);
+
+	if (tsd != NULL)
+		return (arena_choose_impl(tsd, NULL, true));
+	return (arena);
+}
+
 JEMALLOC_INLINE arena_tdata_t *
 arena_tdata_get(tsd_t *tsd, unsigned ind, bool refresh_if_missing)
 {

include/jemalloc/internal/private_symbols.txt

@@ -10,6 +10,7 @@ arena_bitselm_get_mutable
 arena_boot
 arena_choose
 arena_choose_hard
+arena_choose_impl
 arena_chunk_alloc_huge
 arena_chunk_cache_maybe_insert
 arena_chunk_cache_maybe_remove
@@ -35,6 +36,7 @@ arena_decay_time_set
 arena_dss_prec_get
 arena_dss_prec_set
 arena_get
+arena_ichoose
 arena_init
 arena_lg_dirty_mult_default_get
 arena_lg_dirty_mult_default_set

include/jemalloc/internal/tcache.h

@@ -293,7 +293,7 @@ tcache_alloc_small(tsd_t *tsd, arena_t *arena, tcache_t *tcache, size_t size,
 	assert(tcache_success == (ret != NULL));
 	if (unlikely(!tcache_success)) {
 		bool tcache_hard_success;
-		arena = arena_choose(tsd, arena, false);
+		arena = arena_choose(tsd, arena);
 		if (unlikely(arena == NULL))
 			return (NULL);
 
@@ -354,7 +354,7 @@ tcache_alloc_large(tsd_t *tsd, arena_t *arena, tcache_t *tcache, size_t size,
 		 * Only allocate one large object at a time, because it's quite
 		 * expensive to create one and not use it.
 		 */
-		arena = arena_choose(tsd, arena, false);
+		arena = arena_choose(tsd, arena);
 		if (unlikely(arena == NULL))
 			return (NULL);
 
@@ -460,8 +460,7 @@ tcaches_get(tsd_t *tsd, unsigned ind)
 {
 	tcaches_t *elm = &tcaches[ind];
 	if (unlikely(elm->tcache == NULL)) {
-		elm->tcache = tcache_create(tsd, arena_choose(tsd, NULL,
+		elm->tcache = tcache_create(tsd, arena_choose(tsd, NULL));
-		    false));
 	}
 	return (elm->tcache);
 }

src/arena.c

@@ -2649,7 +2649,7 @@ arena_malloc_hard(tsd_t *tsd, arena_t *arena, size_t size, szind_t ind,
     bool zero)
 {
 
-	arena = arena_choose(tsd, arena, false);
+	arena = arena_choose(tsd, arena);
 	if (unlikely(arena == NULL))
 		return (NULL);
 
@@ -2674,7 +2674,7 @@ arena_palloc_large(tsd_t *tsd, arena_t *arena, size_t usize, size_t alignment,
 
 	assert(usize == PAGE_CEILING(usize));
 
-	arena = arena_choose(tsd, arena, false);
+	arena = arena_choose(tsd, arena);
 	if (unlikely(arena == NULL))
 		return (NULL);
 

src/ckh.c

@@ -271,7 +271,7 @@ ckh_grow(tsd_t *tsd, ckh_t *ckh)
 			goto label_return;
 		}
 		tab = (ckhc_t *)ipallocztm(tsd, usize, CACHELINE, true, NULL,
-		    true, arena_choose(tsd, NULL, true));
+		    true, arena_ichoose(tsd, NULL));
 		if (tab == NULL) {
 			ret = true;
 			goto label_return;
@@ -315,7 +315,7 @@ ckh_shrink(tsd_t *tsd, ckh_t *ckh)
 	if (unlikely(usize == 0 || usize > HUGE_MAXCLASS))
 		return;
 	tab = (ckhc_t *)ipallocztm(tsd, usize, CACHELINE, true, NULL, true,
-	    arena_choose(tsd, NULL, true));
+	    arena_ichoose(tsd, NULL));
 	if (tab == NULL) {
 		/*
 		 * An OOM error isn't worth propagating, since it doesn't
@@ -392,7 +392,7 @@ ckh_new(tsd_t *tsd, ckh_t *ckh, size_t minitems, ckh_hash_t *hash,
 		goto label_return;
 	}
 	ckh->tab = (ckhc_t *)ipallocztm(tsd, usize, CACHELINE, true, NULL, true,
-	    arena_choose(tsd, NULL, true));
+	    arena_ichoose(tsd, NULL));
 	if (ckh->tab == NULL) {
 		ret = true;
 		goto label_return;

src/ctl.c

@@ -1306,7 +1306,7 @@ thread_arena_ctl(tsd_t *tsd, const size_t *mib, size_t miblen, void *oldp,
 	arena_t *oldarena;
 	unsigned newind, oldind;
 
-	oldarena = arena_choose(tsd, NULL, false);
+	oldarena = arena_choose(tsd, NULL);
 	if (oldarena == NULL)
 		return (EAGAIN);
 

src/huge.c

@@ -56,8 +56,9 @@ huge_palloc(tsd_t *tsd, arena_t *arena, size_t usize, size_t alignment,
 	assert(ausize >= chunksize);
 
 	/* Allocate an extent node with which to track the chunk. */
+	assert(tsd != NULL || arena != NULL);
 	node = ipallocztm(tsd, CACHELINE_CEILING(sizeof(extent_node_t)),
-	    CACHELINE, false, NULL, true, arena_choose(tsd, NULL, true));
+	    CACHELINE, false, NULL, true, arena_ichoose(tsd, arena));
 	if (node == NULL)
 		return (NULL);
 
@@ -66,7 +67,7 @@ huge_palloc(tsd_t *tsd, arena_t *arena, size_t usize, size_t alignment,
 	 * it is possible to make correct junk/zero fill decisions below.
 	 */
 	is_zeroed = zero;
-	arena = arena_choose(tsd, arena, false);
+	arena = arena_choose(tsd, arena);
 	if (unlikely(arena == NULL) || (ret = arena_chunk_alloc_huge(tsd, arena,
 	    usize, alignment, &is_zeroed)) == NULL) {
 		idalloctm(tsd, node, NULL, true, true);

src/prof.c

@@ -795,7 +795,7 @@ prof_lookup(tsd_t *tsd, prof_bt_t *bt)
 		/* Link a prof_tctx_t into gctx for this thread. */
 		ret.v = iallocztm(tsd, sizeof(prof_tctx_t),
 		    size2index(sizeof(prof_tctx_t)), false, NULL, true,
-		    arena_choose(tsd, NULL, true), true);
+		    arena_ichoose(tsd, NULL), true);
 		if (ret.p == NULL) {
 			if (new_gctx)
 				prof_gctx_try_destroy(tsd, tdata, gctx, tdata);

src/tcache.c

@@ -97,7 +97,7 @@ tcache_bin_flush_small(tsd_t *tsd, tcache_t *tcache, tcache_bin_t *tbin,
 	assert(binind < NBINS);
 	assert(rem <= tbin->ncached);
 
-	arena = arena_choose(tsd, NULL, false);
+	arena = arena_choose(tsd, NULL);
 	assert(arena != NULL);
 	for (nflush = tbin->ncached - rem; nflush > 0; nflush = ndeferred) {
 		/* Lock the arena bin associated with the first object. */
@@ -179,7 +179,7 @@ tcache_bin_flush_large(tsd_t *tsd, tcache_bin_t *tbin, szind_t binind,
 	assert(binind < nhbins);
 	assert(rem <= tbin->ncached);
 
-	arena = arena_choose(tsd, NULL, false);
+	arena = arena_choose(tsd, NULL);
 	assert(arena != NULL);
 	for (nflush = tbin->ncached - rem; nflush > 0; nflush = ndeferred) {
 		/* Lock the arena associated with the first object. */
@@ -307,7 +307,7 @@ tcache_get_hard(tsd_t *tsd)
 			tcache_enabled_set(false); /* Memoize. */
 		return (NULL);
 	}
-	arena = arena_choose(tsd, NULL, false);
+	arena = arena_choose(tsd, NULL);
 	if (unlikely(arena == NULL))
 		return (NULL);
 	return (tcache_create(tsd, arena));
@@ -359,7 +359,7 @@ tcache_destroy(tsd_t *tsd, tcache_t *tcache)
 	arena_t *arena;
 	unsigned i;
 
-	arena = arena_choose(tsd, NULL, false);
+	arena = arena_choose(tsd, NULL);
 	tcache_arena_dissociate(tsd, tcache, arena);
 
 	for (i = 0; i < NBINS; i++) {
@@ -459,7 +459,7 @@ tcaches_create(tsd_t *tsd, unsigned *r_ind)
 
 	if (tcaches_avail == NULL && tcaches_past > MALLOCX_TCACHE_MAX)
 		return (true);
-	arena = arena_choose(tsd, NULL, true);
+	arena = arena_ichoose(tsd, NULL);
 	if (unlikely(arena == NULL))
 		return (true);
 	tcache = tcache_create(tsd, arena);