PA: Add a stats type.

include/jemalloc/internal/arena_stats.h

@@ -4,6 +4,7 @@
 #include "jemalloc/internal/atomic.h"
 #include "jemalloc/internal/mutex.h"
 #include "jemalloc/internal/mutex_prof.h"
+#include "jemalloc/internal/pa.h"
 #include "jemalloc/internal/sc.h"
 
 JEMALLOC_DIAGNOSTIC_DISABLE_SPURIOUS
@@ -112,8 +113,12 @@ struct arena_stats_s {
 	arena_stats_u64_t	nflushes_large; /* Derived. */
 	arena_stats_u64_t	nrequests_large; /* Derived. */
 
-	/* VM space had to be leaked (undocumented).  Normally 0. */
-	atomic_zu_t		abandoned_vm;
+	/*
+	 * The stats logically owned by the pa_shard in the same arena.  This
+	 * lives here only because it's convenient for the purposes of the ctl
+	 * module -- it only knows about the single arena_stats.
+	 */
+	pa_shard_stats_t	pa_shard_stats;
 
 	/* Number of bytes cached in tcache associated with this arena. */
 	atomic_zu_t		tcache_bytes; /* Derived. */

include/jemalloc/internal/pa.h

@@ -1,11 +1,20 @@
 #ifndef JEMALLOC_INTERNAL_PA_H
 #define JEMALLOC_INTERNAL_PA_H
 
+#include "jemalloc/internal/ecache.h"
+#include "jemalloc/internal/edata_cache.h"
+
 /*
  * The page allocator; responsible for acquiring pages of memory for
  * allocations.
  */
 
+typedef struct pa_shard_stats_s pa_shard_stats_t;
+struct pa_shard_stats_s {
+	/* VM space had to be leaked (undocumented).  Normally 0. */
+	atomic_zu_t abandoned_vm;
+};
+
 typedef struct pa_shard_s pa_shard_t;
 struct pa_shard_s {
 	/*
@@ -20,9 +29,12 @@ struct pa_shard_s {
 
 	/* The source of edata_t objects. */
 	edata_cache_t edata_cache;
+
+	pa_shard_stats_t *stats;
 };
 
 /* Returns true on error. */
-bool pa_shard_init(tsdn_t *tsdn, pa_shard_t *shard, base_t *base, unsigned ind);
+bool pa_shard_init(tsdn_t *tsdn, pa_shard_t *shard, base_t *base, unsigned ind,
+    pa_shard_stats_t *stats);
 
 #endif /* JEMALLOC_INTERNAL_PA_H */