Refactor to support more varied testing.

Refactor the test harness to support three types of tests:
- unit: White box unit tests.  These tests have full access to all
  internal jemalloc library symbols.  Though in actuality all symbols
  are prefixed by jet_, macro-based name mangling abstracts this away
  from test code.
- integration: Black box integration tests.  These tests link with
  the installable shared jemalloc library, and with the exception of
  some utility code and configure-generated macro definitions, they have
  no access to jemalloc internals.
- stress: Black box stress tests.  These tests link with the installable
  shared jemalloc library, as well as with an internal allocator with
  symbols prefixed by jet_ (same as for unit tests) that can be used to
  allocate data structures that are internal to the test code.

Move existing tests into test/{unit,integration}/ as appropriate.

Split out internal parts of jemalloc_defs.h.in and put them in
jemalloc_internal_defs.h.in.  This reduces internals exposure to
applications that #include <jemalloc/jemalloc.h>.

Refactor jemalloc.h header generation so that a single header file
results, and the prototypes can be used to generate jet_ prototypes for
tests.  Split jemalloc.h.in into multiple parts (jemalloc_defs.h.in,
jemalloc_macros.h.in, jemalloc_protos.h.in, jemalloc_mangle.h.in) and
use a shell script to generate a unified jemalloc.h at configure time.

Change the default private namespace prefix from "" to "je_".

Add missing private namespace mangling.

Remove hard-coded private_namespace.h.  Instead generate it and
private_unnamespace.h from private_symbols.txt.  Use similar logic for
public symbols, which aids in name mangling for jet_ symbols.

Add test_warn() and test_fail().  Replace existing exit(1) calls with
test_fail() calls.

include/jemalloc/internal/private_symbols.txt

@@ -0,0 +1,402 @@
+a0calloc
+a0free
+a0malloc
+arena_alloc_junk_small
+arena_bin_index
+arena_bin_info
+arena_boot
+arena_dalloc
+arena_dalloc_bin
+arena_dalloc_bin_locked
+arena_dalloc_junk_small
+arena_dalloc_large
+arena_dalloc_large_locked
+arena_dalloc_small
+arena_dss_prec_get
+arena_dss_prec_set
+arena_malloc
+arena_malloc_large
+arena_malloc_small
+arena_mapbits_allocated_get
+arena_mapbits_binind_get
+arena_mapbits_dirty_get
+arena_mapbits_get
+arena_mapbits_large_binind_set
+arena_mapbits_large_get
+arena_mapbits_large_set
+arena_mapbits_large_size_get
+arena_mapbits_small_runind_get
+arena_mapbits_small_set
+arena_mapbits_unallocated_set
+arena_mapbits_unallocated_size_get
+arena_mapbits_unallocated_size_set
+arena_mapbits_unzeroed_get
+arena_mapbits_unzeroed_set
+arena_mapbitsp_get
+arena_mapbitsp_read
+arena_mapbitsp_write
+arena_mapp_get
+arena_maxclass
+arena_new
+arena_palloc
+arena_postfork_child
+arena_postfork_parent
+arena_prefork
+arena_prof_accum
+arena_prof_accum_impl
+arena_prof_accum_locked
+arena_prof_ctx_get
+arena_prof_ctx_set
+arena_prof_promoted
+arena_ptr_small_binind_get
+arena_purge_all
+arena_ralloc
+arena_ralloc_no_move
+arena_run_regind
+arena_salloc
+arena_stats_merge
+arena_tcache_fill_small
+arenas
+arenas_booted
+arenas_cleanup
+arenas_extend
+arenas_initialized
+arenas_lock
+arenas_tls
+arenas_tsd
+arenas_tsd_boot
+arenas_tsd_cleanup_wrapper
+arenas_tsd_get
+arenas_tsd_get_wrapper
+arenas_tsd_init_head
+arenas_tsd_set
+atomic_add_u
+atomic_add_uint32
+atomic_add_uint64
+atomic_add_z
+atomic_sub_u
+atomic_sub_uint32
+atomic_sub_uint64
+atomic_sub_z
+base_alloc
+base_boot
+base_calloc
+base_node_alloc
+base_node_dealloc
+base_postfork_child
+base_postfork_parent
+base_prefork
+bitmap_full
+bitmap_get
+bitmap_info_init
+bitmap_info_ngroups
+bitmap_init
+bitmap_set
+bitmap_sfu
+bitmap_size
+bitmap_unset
+bt_init
+buferror
+choose_arena
+choose_arena_hard
+chunk_alloc
+chunk_alloc_dss
+chunk_alloc_mmap
+chunk_boot
+chunk_dealloc
+chunk_dealloc_mmap
+chunk_dss_boot
+chunk_dss_postfork_child
+chunk_dss_postfork_parent
+chunk_dss_prec_get
+chunk_dss_prec_set
+chunk_dss_prefork
+chunk_in_dss
+chunk_npages
+chunk_postfork_child
+chunk_postfork_parent
+chunk_prefork
+chunk_unmap
+chunks_mtx
+chunks_rtree
+chunksize
+chunksize_mask
+ckh_bucket_search
+ckh_count
+ckh_delete
+ckh_evict_reloc_insert
+ckh_insert
+ckh_isearch
+ckh_iter
+ckh_new
+ckh_pointer_hash
+ckh_pointer_keycomp
+ckh_rebuild
+ckh_remove
+ckh_search
+ckh_string_hash
+ckh_string_keycomp
+ckh_try_bucket_insert
+ckh_try_insert
+ctl_boot
+ctl_bymib
+ctl_byname
+ctl_nametomib
+ctl_postfork_child
+ctl_postfork_parent
+ctl_prefork
+dss_prec_names
+extent_tree_ad_first
+extent_tree_ad_insert
+extent_tree_ad_iter
+extent_tree_ad_iter_recurse
+extent_tree_ad_iter_start
+extent_tree_ad_last
+extent_tree_ad_new
+extent_tree_ad_next
+extent_tree_ad_nsearch
+extent_tree_ad_prev
+extent_tree_ad_psearch
+extent_tree_ad_remove
+extent_tree_ad_reverse_iter
+extent_tree_ad_reverse_iter_recurse
+extent_tree_ad_reverse_iter_start
+extent_tree_ad_search
+extent_tree_szad_first
+extent_tree_szad_insert
+extent_tree_szad_iter
+extent_tree_szad_iter_recurse
+extent_tree_szad_iter_start
+extent_tree_szad_last
+extent_tree_szad_new
+extent_tree_szad_next
+extent_tree_szad_nsearch
+extent_tree_szad_prev
+extent_tree_szad_psearch
+extent_tree_szad_remove
+extent_tree_szad_reverse_iter
+extent_tree_szad_reverse_iter_recurse
+extent_tree_szad_reverse_iter_start
+extent_tree_szad_search
+get_errno
+hash
+hash_fmix_32
+hash_fmix_64
+hash_get_block_32
+hash_get_block_64
+hash_rotl_32
+hash_rotl_64
+hash_x64_128
+hash_x86_128
+hash_x86_32
+huge_allocated
+huge_boot
+huge_dalloc
+huge_malloc
+huge_mtx
+huge_ndalloc
+huge_nmalloc
+huge_palloc
+huge_postfork_child
+huge_postfork_parent
+huge_prefork
+huge_prof_ctx_get
+huge_prof_ctx_set
+huge_ralloc
+huge_ralloc_no_move
+huge_salloc
+iallocm
+icalloc
+icallocx
+idalloc
+idallocx
+imalloc
+imallocx
+ipalloc
+ipallocx
+iqalloc
+iqallocx
+iralloc
+irallocx
+isalloc
+isthreaded
+ivsalloc
+jemalloc_postfork_child
+jemalloc_postfork_parent
+jemalloc_prefork
+malloc_cprintf
+malloc_mutex_init
+malloc_mutex_lock
+malloc_mutex_postfork_child
+malloc_mutex_postfork_parent
+malloc_mutex_prefork
+malloc_mutex_unlock
+malloc_printf
+malloc_snprintf
+malloc_strtoumax
+malloc_tsd_boot
+malloc_tsd_cleanup_register
+malloc_tsd_dalloc
+malloc_tsd_malloc
+malloc_tsd_no_cleanup
+malloc_vcprintf
+malloc_vsnprintf
+malloc_write
+map_bias
+mb_write
+mutex_boot
+narenas_auto
+narenas_total
+narenas_total_get
+ncpus
+nhbins
+opt_abort
+opt_dss
+opt_junk
+opt_lg_chunk
+opt_lg_dirty_mult
+opt_lg_prof_interval
+opt_lg_prof_sample
+opt_lg_tcache_max
+opt_narenas
+opt_prof
+opt_prof_accum
+opt_prof_active
+opt_prof_final
+opt_prof_gdump
+opt_prof_leak
+opt_prof_prefix
+opt_quarantine
+opt_redzone
+opt_stats_print
+opt_tcache
+opt_utrace
+opt_valgrind
+opt_xmalloc
+opt_zero
+p2rz
+pages_purge
+pow2_ceil
+prof_backtrace
+prof_boot0
+prof_boot1
+prof_boot2
+prof_ctx_get
+prof_ctx_set
+prof_free
+prof_gdump
+prof_idump
+prof_interval
+prof_lookup
+prof_malloc
+prof_mdump
+prof_postfork_child
+prof_postfork_parent
+prof_prefork
+prof_promote
+prof_realloc
+prof_sample_accum_update
+prof_sample_threshold_update
+prof_tdata_booted
+prof_tdata_cleanup
+prof_tdata_get
+prof_tdata_init
+prof_tdata_initialized
+prof_tdata_tls
+prof_tdata_tsd
+prof_tdata_tsd_boot
+prof_tdata_tsd_cleanup_wrapper
+prof_tdata_tsd_get
+prof_tdata_tsd_get_wrapper
+prof_tdata_tsd_init_head
+prof_tdata_tsd_set
+quarantine
+quarantine_alloc_hook
+quarantine_boot
+quarantine_booted
+quarantine_cleanup
+quarantine_init
+quarantine_tls
+quarantine_tsd
+quarantine_tsd_boot
+quarantine_tsd_cleanup_wrapper
+quarantine_tsd_get
+quarantine_tsd_get_wrapper
+quarantine_tsd_init_head
+quarantine_tsd_set
+register_zone
+rtree_get
+rtree_get_locked
+rtree_new
+rtree_postfork_child
+rtree_postfork_parent
+rtree_prefork
+rtree_set
+s2u
+sa2u
+set_errno
+small_size2bin
+stats_cactive
+stats_cactive_add
+stats_cactive_get
+stats_cactive_sub
+stats_chunks
+stats_print
+tcache_alloc_easy
+tcache_alloc_large
+tcache_alloc_small
+tcache_alloc_small_hard
+tcache_arena_associate
+tcache_arena_dissociate
+tcache_bin_flush_large
+tcache_bin_flush_small
+tcache_bin_info
+tcache_boot0
+tcache_boot1
+tcache_booted
+tcache_create
+tcache_dalloc_large
+tcache_dalloc_small
+tcache_destroy
+tcache_enabled_booted
+tcache_enabled_get
+tcache_enabled_initialized
+tcache_enabled_set
+tcache_enabled_tls
+tcache_enabled_tsd
+tcache_enabled_tsd_boot
+tcache_enabled_tsd_cleanup_wrapper
+tcache_enabled_tsd_get
+tcache_enabled_tsd_get_wrapper
+tcache_enabled_tsd_init_head
+tcache_enabled_tsd_set
+tcache_event
+tcache_event_hard
+tcache_flush
+tcache_get
+tcache_initialized
+tcache_maxclass
+tcache_salloc
+tcache_stats_merge
+tcache_thread_cleanup
+tcache_tls
+tcache_tsd
+tcache_tsd_boot
+tcache_tsd_cleanup_wrapper
+tcache_tsd_get
+tcache_tsd_get_wrapper
+tcache_tsd_init_head
+tcache_tsd_set
+thread_allocated_booted
+thread_allocated_initialized
+thread_allocated_tls
+thread_allocated_tsd
+thread_allocated_tsd_boot
+thread_allocated_tsd_cleanup_wrapper
+thread_allocated_tsd_get
+thread_allocated_tsd_get_wrapper
+thread_allocated_tsd_init_head
+thread_allocated_tsd_set
+tsd_init_check_recursion
+tsd_init_finish
+u2rz