Add junk/zero filling unit tests, and fix discovered bugs.

Fix growing large reallocation to junk fill new space.

Fix huge deallocation to junk fill when munmap is disabled.

include/jemalloc/internal/arena.h

@@ -408,9 +408,12 @@ void	arena_alloc_junk_small(void *ptr, arena_bin_info_t *bin_info,
 #ifdef JEMALLOC_JET
 typedef void (arena_redzone_corruption_t)(void *, size_t, bool, size_t,
     uint8_t);
-extern arena_redzone_corruption_t *arena_redzone_corruption_fptr;
-#endif
+extern arena_redzone_corruption_t *arena_redzone_corruption;
+typedef void (arena_dalloc_junk_small_t)(void *, arena_bin_info_t *);
+extern arena_dalloc_junk_small_t *arena_dalloc_junk_small;
+#else
 void	arena_dalloc_junk_small(void *ptr, arena_bin_info_t *bin_info);
+#endif
 void	arena_quarantine_junk_small(void *ptr, size_t usize);
 void	*arena_malloc_small(arena_t *arena, size_t size, bool zero);
 void	*arena_malloc_large(arena_t *arena, size_t size, bool zero);
@@ -422,9 +425,17 @@ void	arena_dalloc_bin(arena_t *arena, arena_chunk_t *chunk, void *ptr,
     size_t pageind, arena_chunk_map_t *mapelm);
 void	arena_dalloc_small(arena_t *arena, arena_chunk_t *chunk, void *ptr,
     size_t pageind);
+#ifdef JEMALLOC_JET
+typedef void (arena_dalloc_junk_large_t)(void *, size_t);
+extern arena_dalloc_junk_large_t *arena_dalloc_junk_large;
+#endif
 void	arena_dalloc_large_locked(arena_t *arena, arena_chunk_t *chunk,
     void *ptr);
 void	arena_dalloc_large(arena_t *arena, arena_chunk_t *chunk, void *ptr);
+#ifdef JEMALLOC_JET
+typedef void (arena_ralloc_junk_large_t)(void *, size_t, size_t);
+extern arena_ralloc_junk_large_t *arena_ralloc_junk_large;
+#endif
 void	*arena_ralloc_no_move(void *ptr, size_t oldsize, size_t size,
     size_t extra, bool zero);
 void	*arena_ralloc(arena_t *arena, void *ptr, size_t oldsize, size_t size,

include/jemalloc/internal/huge.h

@@ -23,6 +23,10 @@ void	*huge_ralloc_no_move(void *ptr, size_t oldsize, size_t size,
     size_t extra);
 void	*huge_ralloc(void *ptr, size_t oldsize, size_t size, size_t extra,
     size_t alignment, bool zero, bool try_tcache_dalloc);
+#ifdef JEMALLOC_JET
+typedef void (huge_dalloc_junk_t)(void *, size_t);
+extern huge_dalloc_junk_t *huge_dalloc_junk;
+#endif
 void	huge_dalloc(void *ptr, bool unmap);
 size_t	huge_salloc(const void *ptr);
 prof_ctx_t	*huge_prof_ctx_get(const void *ptr);

include/jemalloc/internal/private_symbols.txt

@@ -8,6 +8,7 @@ arena_boot
 arena_dalloc
 arena_dalloc_bin
 arena_dalloc_bin_locked
+arena_dalloc_junk_large
 arena_dalloc_junk_small
 arena_dalloc_large
 arena_dalloc_large_locked
@@ -52,6 +53,7 @@ arena_ptr_small_binind_get
 arena_purge_all
 arena_quarantine_junk_small
 arena_ralloc
+arena_ralloc_junk_large
 arena_ralloc_no_move
 arena_redzone_corruption
 arena_run_regind
@@ -194,6 +196,7 @@ hash_x86_32
 huge_allocated
 huge_boot
 huge_dalloc
+huge_dalloc_junk
 huge_malloc
 huge_mtx
 huge_ndalloc