1diff --git a/doc/jemalloc.xml.in b/doc/jemalloc.xml.in
2index 7fecda7c..d5ca5e86 100644
3--- a/doc/jemalloc.xml.in
4+++ b/doc/jemalloc.xml.in
5@@ -53,11 +53,22 @@
6     <para>This manual describes jemalloc @jemalloc_version@.  More information
7     can be found at the <ulink
8     url="http://jemalloc.net/">jemalloc website</ulink>.</para>
9+
10+    <para>The following configuration options are enabled in libc's built-in
11+    jemalloc: <option>--enable-fill</option>,
12+    <option>--enable-lazy-lock</option>, <option>--enable-stats</option>,
13+    <option>--enable-utrace</option>, <option>--enable-xmalloc</option>, and
14+    <option>--with-malloc-conf=abort_conf:false</option>.
15+    Additionally, <option>--enable-debug</option> is enabled in development
16+    versions of FreeBSD (controlled by the
17+    <constant>MK_MALLOC_PRODUCTION</constant> make variable).</para>
18+
19   </refsect1>
20   <refsynopsisdiv>
21     <title>SYNOPSIS</title>
22     <funcsynopsis>
23-      <funcsynopsisinfo>#include &lt;<filename class="headerfile">jemalloc/jemalloc.h</filename>&gt;</funcsynopsisinfo>
24+      <funcsynopsisinfo>#include &lt;<filename class="headerfile">stdlib.h</filename>&gt;
25+#include &lt;<filename class="headerfile">malloc_np.h</filename>&gt;</funcsynopsisinfo>
26       <refsect2>
27         <title>Standard API</title>
28         <funcprototype>
29@@ -3510,4 +3521,18 @@ malloc_conf = "narenas:1";]]></programlisting></para>
30     <para>The <function>posix_memalign()</function> function conforms
31     to IEEE Std 1003.1-2001 (<quote>POSIX.1</quote>).</para>
32   </refsect1>
33+  <refsect1 id="history">
34+    <title>HISTORY</title>
35+    <para>The <function>malloc_usable_size()</function> and
36+    <function>posix_memalign()</function> functions first appeared in FreeBSD
37+    7.0.</para>
38+
39+    <para>The <function>aligned_alloc()</function>,
40+    <function>malloc_stats_print()</function>, and
41+    <function>mallctl*()</function> functions first appeared in FreeBSD
42+    10.0.</para>
43+
44+    <para>The <function>*allocx()</function> functions first appeared in FreeBSD
45+    11.0.</para>
46+  </refsect1>
47 </refentry>
48diff --git a/include/jemalloc/internal/jemalloc_internal_decls.h b/include/jemalloc/internal/jemalloc_internal_decls.h
49index 7d6053e2..a0e4f5af 100644
50--- a/include/jemalloc/internal/jemalloc_internal_decls.h
51+++ b/include/jemalloc/internal/jemalloc_internal_decls.h
52@@ -1,6 +1,9 @@
53 #ifndef JEMALLOC_INTERNAL_DECLS_H
54 #define JEMALLOC_INTERNAL_DECLS_H
55 
56+#include "libc_private.h"
57+#include "namespace.h"
58+
59 #include <math.h>
60 #ifdef _WIN32
61 #  include <windows.h>
62diff --git a/include/jemalloc/internal/jemalloc_internal_defs_FreeBSD.h b/include/jemalloc/internal/jemalloc_internal_defs_FreeBSD.h
63new file mode 100644
64index 00000000..0dab1296
65--- /dev/null
66+++ b/include/jemalloc/internal/jemalloc_internal_defs_FreeBSD.h
67@@ -0,0 +1,9 @@
68+#ifndef __clang__
69+#  undef JEMALLOC_INTERNAL_UNREACHABLE
70+#  define JEMALLOC_INTERNAL_UNREACHABLE abort
71+
72+#  undef JEMALLOC_C11_ATOMICS
73+#  undef JEMALLOC_GCC_ATOMIC_ATOMICS
74+#  undef JEMALLOC_GCC_U8_ATOMIC_ATOMICS
75+#  undef JEMALLOC_GCC_U8_SYNC_ATOMICS
76+#endif
77diff --git a/include/jemalloc/internal/jemalloc_preamble.h.in b/include/jemalloc/internal/jemalloc_preamble.h.in
78index 3418cbfa..53e30dc4 100644
79--- a/include/jemalloc/internal/jemalloc_preamble.h.in
80+++ b/include/jemalloc/internal/jemalloc_preamble.h.in
81@@ -8,6 +8,9 @@
82 #include <sys/ktrace.h>
83 #endif
84 
85+#include "un-namespace.h"
86+#include "libc_private.h"
87+
88 #define JEMALLOC_NO_DEMANGLE
89 #ifdef JEMALLOC_JET
90 #  undef JEMALLOC_IS_MALLOC
91@@ -79,13 +82,7 @@ static const bool config_fill =
92     false
93 #endif
94     ;
95-static const bool config_lazy_lock =
96-#ifdef JEMALLOC_LAZY_LOCK
97-    true
98-#else
99-    false
100-#endif
101-    ;
102+static const bool config_lazy_lock = true;
103 static const char * const config_malloc_conf = JEMALLOC_CONFIG_MALLOC_CONF;
104 static const bool config_prof =
105 #ifdef JEMALLOC_PROF
106diff --git a/include/jemalloc/internal/mutex.h b/include/jemalloc/internal/mutex.h
107index 7c24f072..94af1618 100644
108--- a/include/jemalloc/internal/mutex.h
109+++ b/include/jemalloc/internal/mutex.h
110@@ -135,9 +135,6 @@ struct malloc_mutex_s {
111 
112 #ifdef JEMALLOC_LAZY_LOCK
113 extern bool isthreaded;
114-#else
115-#  undef isthreaded /* Undo private_namespace.h definition. */
116-#  define isthreaded true
117 #endif
118 
119 bool malloc_mutex_init(malloc_mutex_t *mutex, const char *name,
120@@ -145,6 +142,7 @@ bool malloc_mutex_init(malloc_mutex_t *mutex, const char *name,
121 void malloc_mutex_prefork(tsdn_t *tsdn, malloc_mutex_t *mutex);
122 void malloc_mutex_postfork_parent(tsdn_t *tsdn, malloc_mutex_t *mutex);
123 void malloc_mutex_postfork_child(tsdn_t *tsdn, malloc_mutex_t *mutex);
124+bool malloc_mutex_first_thread(void);
125 bool malloc_mutex_boot(void);
126 void malloc_mutex_prof_data_reset(tsdn_t *tsdn, malloc_mutex_t *mutex);
127 
128diff --git a/include/jemalloc/internal/test_hooks.h b/include/jemalloc/internal/test_hooks.h
129index a6351e59..0780c52f 100644
130--- a/include/jemalloc/internal/test_hooks.h
131+++ b/include/jemalloc/internal/test_hooks.h
132@@ -6,13 +6,6 @@ extern JEMALLOC_EXPORT void (*test_hooks_libc_hook)();
133 
134 #define JEMALLOC_HOOK(fn, hook) ((void)(hook != NULL && (hook(), 0)), fn)
135 
136-#define open JEMALLOC_HOOK(open, test_hooks_libc_hook)
137-#define read JEMALLOC_HOOK(read, test_hooks_libc_hook)
138-#define write JEMALLOC_HOOK(write, test_hooks_libc_hook)
139-#define readlink JEMALLOC_HOOK(readlink, test_hooks_libc_hook)
140-#define close JEMALLOC_HOOK(close, test_hooks_libc_hook)
141-#define creat JEMALLOC_HOOK(creat, test_hooks_libc_hook)
142-#define secure_getenv JEMALLOC_HOOK(secure_getenv, test_hooks_libc_hook)
143 /* Note that this is undef'd and re-define'd in src/prof.c. */
144 #define _Unwind_Backtrace JEMALLOC_HOOK(_Unwind_Backtrace, test_hooks_libc_hook)
145 
146diff --git a/include/jemalloc/internal/tsd.h b/include/jemalloc/internal/tsd.h
147index 9ba26004..ecfda5d6 100644
148--- a/include/jemalloc/internal/tsd.h
149+++ b/include/jemalloc/internal/tsd.h
150@@ -198,7 +198,8 @@ struct tsd_s {
151 	t TSD_MANGLE(n);
152 MALLOC_TSD
153 #undef O
154-};
155+/* AddressSanitizer requires TLS data to be aligned to at least 8 bytes. */
156+} JEMALLOC_ALIGNED(16);
157 
158 JEMALLOC_ALWAYS_INLINE uint8_t
159 tsd_state_get(tsd_t *tsd) {
160diff --git a/include/jemalloc/jemalloc_FreeBSD.h b/include/jemalloc/jemalloc_FreeBSD.h
161new file mode 100644
162index 00000000..b752b0e7
163--- /dev/null
164+++ b/include/jemalloc/jemalloc_FreeBSD.h
165@@ -0,0 +1,185 @@
166+/*
167+ * Override settings that were generated in jemalloc_defs.h as necessary.
168+ */
169+
170+#undef JEMALLOC_OVERRIDE_VALLOC
171+
172+#ifndef MALLOC_PRODUCTION
173+#define	JEMALLOC_DEBUG
174+#endif
175+
176+#undef JEMALLOC_DSS
177+
178+#undef JEMALLOC_BACKGROUND_THREAD
179+
180+/*
181+ * The following are architecture-dependent, so conditionally define them for
182+ * each supported architecture.
183+ */
184+#undef JEMALLOC_TLS_MODEL
185+#undef LG_PAGE
186+#undef LG_VADDR
187+#undef LG_SIZEOF_PTR
188+#undef LG_SIZEOF_INT
189+#undef LG_SIZEOF_LONG
190+#undef LG_SIZEOF_INTMAX_T
191+
192+#ifdef __i386__
193+#  define LG_VADDR		32
194+#  define LG_SIZEOF_PTR		2
195+#  define JEMALLOC_TLS_MODEL	__attribute__((tls_model("initial-exec")))
196+#endif
197+#ifdef __ia64__
198+#  define LG_VADDR		64
199+#  define LG_SIZEOF_PTR		3
200+#endif
201+#ifdef __sparc64__
202+#  define LG_VADDR		64
203+#  define LG_SIZEOF_PTR		3
204+#  define JEMALLOC_TLS_MODEL	__attribute__((tls_model("initial-exec")))
205+#endif
206+#ifdef __amd64__
207+#  define LG_VADDR		48
208+#  define LG_SIZEOF_PTR		3
209+#  define JEMALLOC_TLS_MODEL	__attribute__((tls_model("initial-exec")))
210+#endif
211+#ifdef __arm__
212+#  define LG_VADDR		32
213+#  define LG_SIZEOF_PTR		2
214+#endif
215+#ifdef __aarch64__
216+#  define LG_VADDR		48
217+#  define LG_SIZEOF_PTR		3
218+#endif
219+#ifdef __mips__
220+#ifdef __mips_n64
221+#  define LG_VADDR		64
222+#  define LG_SIZEOF_PTR		3
223+#else
224+#  define LG_VADDR		32
225+#  define LG_SIZEOF_PTR		2
226+#endif
227+#endif
228+#ifdef __powerpc64__
229+#  define LG_VADDR		64
230+#  define LG_SIZEOF_PTR		3
231+#elif defined(__powerpc__)
232+#  define LG_VADDR		32
233+#  define LG_SIZEOF_PTR		2
234+#endif
235+#ifdef __riscv
236+#  define LG_VADDR		48
237+#  define LG_SIZEOF_PTR		3
238+#endif
239+
240+#ifndef JEMALLOC_TLS_MODEL
241+#  define JEMALLOC_TLS_MODEL	/* Default. */
242+#endif
243+
244+#define	LG_PAGE			PAGE_SHIFT
245+#define	LG_SIZEOF_INT		2
246+#define	LG_SIZEOF_LONG		LG_SIZEOF_PTR
247+#define	LG_SIZEOF_INTMAX_T	3
248+
249+#undef CPU_SPINWAIT
250+#include <machine/cpu.h>
251+#include <machine/cpufunc.h>
252+#define	CPU_SPINWAIT		cpu_spinwait()
253+
254+/* Disable lazy-lock machinery, mangle isthreaded, and adjust its type. */
255+#undef JEMALLOC_LAZY_LOCK
256+extern int __isthreaded;
257+#define	isthreaded		((bool)__isthreaded)
258+
259+/* Mangle. */
260+#undef je_malloc
261+#undef je_calloc
262+#undef je_posix_memalign
263+#undef je_aligned_alloc
264+#undef je_realloc
265+#undef je_free
266+#undef je_malloc_usable_size
267+#undef je_mallocx
268+#undef je_rallocx
269+#undef je_xallocx
270+#undef je_sallocx
271+#undef je_dallocx
272+#undef je_sdallocx
273+#undef je_nallocx
274+#undef je_mallctl
275+#undef je_mallctlnametomib
276+#undef je_mallctlbymib
277+#undef je_malloc_stats_print
278+#undef je_allocm
279+#undef je_rallocm
280+#undef je_sallocm
281+#undef je_dallocm
282+#undef je_nallocm
283+#define	je_malloc		__malloc
284+#define	je_calloc		__calloc
285+#define	je_posix_memalign	__posix_memalign
286+#define	je_aligned_alloc	__aligned_alloc
287+#define	je_realloc		__realloc
288+#define	je_free			__free
289+#define	je_malloc_usable_size	__malloc_usable_size
290+#define	je_mallocx		__mallocx
291+#define	je_rallocx		__rallocx
292+#define	je_xallocx		__xallocx
293+#define	je_sallocx		__sallocx
294+#define	je_dallocx		__dallocx
295+#define	je_sdallocx		__sdallocx
296+#define	je_nallocx		__nallocx
297+#define	je_mallctl		__mallctl
298+#define	je_mallctlnametomib	__mallctlnametomib
299+#define	je_mallctlbymib		__mallctlbymib
300+#define	je_malloc_stats_print	__malloc_stats_print
301+#define	je_allocm		__allocm
302+#define	je_rallocm		__rallocm
303+#define	je_sallocm		__sallocm
304+#define	je_dallocm		__dallocm
305+#define	je_nallocm		__nallocm
306+#define	open			_open
307+#define	read			_read
308+#define	write			_write
309+#define	close			_close
310+#define	pthread_join		_pthread_join
311+#define	pthread_once		_pthread_once
312+#define	pthread_self		_pthread_self
313+#define	pthread_equal		_pthread_equal
314+#define	pthread_mutex_lock	_pthread_mutex_lock
315+#define	pthread_mutex_trylock	_pthread_mutex_trylock
316+#define	pthread_mutex_unlock	_pthread_mutex_unlock
317+#define	pthread_cond_init	_pthread_cond_init
318+#define	pthread_cond_wait	_pthread_cond_wait
319+#define	pthread_cond_timedwait	_pthread_cond_timedwait
320+#define	pthread_cond_signal	_pthread_cond_signal
321+
322+#ifdef JEMALLOC_C_
323+/*
324+ * Define 'weak' symbols so that an application can have its own versions
325+ * of malloc, calloc, realloc, free, et al.
326+ */
327+__weak_reference(__malloc, malloc);
328+__weak_reference(__calloc, calloc);
329+__weak_reference(__posix_memalign, posix_memalign);
330+__weak_reference(__aligned_alloc, aligned_alloc);
331+__weak_reference(__realloc, realloc);
332+__weak_reference(__free, free);
333+__weak_reference(__malloc_usable_size, malloc_usable_size);
334+__weak_reference(__mallocx, mallocx);
335+__weak_reference(__rallocx, rallocx);
336+__weak_reference(__xallocx, xallocx);
337+__weak_reference(__sallocx, sallocx);
338+__weak_reference(__dallocx, dallocx);
339+__weak_reference(__sdallocx, sdallocx);
340+__weak_reference(__nallocx, nallocx);
341+__weak_reference(__mallctl, mallctl);
342+__weak_reference(__mallctlnametomib, mallctlnametomib);
343+__weak_reference(__mallctlbymib, mallctlbymib);
344+__weak_reference(__malloc_stats_print, malloc_stats_print);
345+__weak_reference(__allocm, allocm);
346+__weak_reference(__rallocm, rallocm);
347+__weak_reference(__sallocm, sallocm);
348+__weak_reference(__dallocm, dallocm);
349+__weak_reference(__nallocm, nallocm);
350+#endif
351diff --git a/include/jemalloc/jemalloc_rename.sh b/include/jemalloc/jemalloc_rename.sh
352index f9438912..47d032c1 100755
353--- a/include/jemalloc/jemalloc_rename.sh
354+++ b/include/jemalloc/jemalloc_rename.sh
355@@ -19,4 +19,6 @@ done
356 
357 cat <<EOF
358 #endif
359+
360+#include "jemalloc_FreeBSD.h"
361 EOF
362diff --git a/src/jemalloc.c b/src/jemalloc.c
363index ed13718d..fefb719a 100644
364--- a/src/jemalloc.c
365+++ b/src/jemalloc.c
366@@ -23,6 +23,10 @@
367 /******************************************************************************/
368 /* Data. */
369 
370+/* Work around <http://llvm.org/bugs/show_bug.cgi?id=12623>: */
371+const char	*__malloc_options_1_0 = NULL;
372+__sym_compat(_malloc_options, __malloc_options_1_0, FBSD_1.0);
373+
374 /* Runtime configuration options. */
375 const char	*je_malloc_conf
376 #ifndef _WIN32
377@@ -2660,25 +2664,6 @@ je_realloc(void *ptr, size_t arg_size) {
378 	LOG("core.realloc.entry", "ptr: %p, size: %zu\n", ptr, size);
379 
380 	if (unlikely(size == 0)) {
381-		if (ptr != NULL) {
382-			/* realloc(ptr, 0) is equivalent to free(ptr). */
383-			UTRACE(ptr, 0, 0);
384-			tcache_t *tcache;
385-			tsd_t *tsd = tsd_fetch();
386-			if (tsd_reentrancy_level_get(tsd) == 0) {
387-				tcache = tcache_get(tsd);
388-			} else {
389-				tcache = NULL;
390-			}
391-
392-			uintptr_t args[3] = {(uintptr_t)ptr, size};
393-			hook_invoke_dalloc(hook_dalloc_realloc, ptr, args);
394-
395-			ifree(tsd, ptr, tcache, true);
396-
397-			LOG("core.realloc.exit", "result: %p", NULL);
398-			return NULL;
399-		}
400 		size = 1;
401 	}
402 
403@@ -3750,6 +3735,103 @@ je_malloc_usable_size(JEMALLOC_USABLE_SIZE_CONST void *ptr) {
404  * End non-standard functions.
405  */
406 /******************************************************************************/
407+/*
408+ * Begin compatibility functions.
409+ */
410+
411+#define	ALLOCM_LG_ALIGN(la)	(la)
412+#define	ALLOCM_ALIGN(a)		(ffsl(a)-1)
413+#define	ALLOCM_ZERO		((int)0x40)
414+#define	ALLOCM_NO_MOVE		((int)0x80)
415+
416+#define	ALLOCM_SUCCESS		0
417+#define	ALLOCM_ERR_OOM		1
418+#define	ALLOCM_ERR_NOT_MOVED	2
419+
420+int
421+je_allocm(void **ptr, size_t *rsize, size_t size, int flags) {
422+	assert(ptr != NULL);
423+
424+	void *p = je_mallocx(size, flags);
425+	if (p == NULL) {
426+		return (ALLOCM_ERR_OOM);
427+	}
428+	if (rsize != NULL) {
429+		*rsize = isalloc(tsdn_fetch(), p);
430+	}
431+	*ptr = p;
432+	return ALLOCM_SUCCESS;
433+}
434+
435+int
436+je_rallocm(void **ptr, size_t *rsize, size_t size, size_t extra, int flags) {
437+	assert(ptr != NULL);
438+	assert(*ptr != NULL);
439+	assert(size != 0);
440+	assert(SIZE_T_MAX - size >= extra);
441+
442+	int ret;
443+	bool no_move = flags & ALLOCM_NO_MOVE;
444+
445+	if (no_move) {
446+		size_t usize = je_xallocx(*ptr, size, extra, flags);
447+		ret = (usize >= size) ? ALLOCM_SUCCESS : ALLOCM_ERR_NOT_MOVED;
448+		if (rsize != NULL) {
449+			*rsize = usize;
450+		}
451+	} else {
452+		void *p = je_rallocx(*ptr, size+extra, flags);
453+		if (p != NULL) {
454+			*ptr = p;
455+			ret = ALLOCM_SUCCESS;
456+		} else {
457+			ret = ALLOCM_ERR_OOM;
458+		}
459+		if (rsize != NULL) {
460+			*rsize = isalloc(tsdn_fetch(), *ptr);
461+		}
462+	}
463+	return ret;
464+}
465+
466+int
467+je_sallocm(const void *ptr, size_t *rsize, int flags) {
468+	assert(rsize != NULL);
469+	*rsize = je_sallocx(ptr, flags);
470+	return ALLOCM_SUCCESS;
471+}
472+
473+int
474+je_dallocm(void *ptr, int flags) {
475+	je_dallocx(ptr, flags);
476+	return ALLOCM_SUCCESS;
477+}
478+
479+int
480+je_nallocm(size_t *rsize, size_t size, int flags) {
481+	size_t usize = je_nallocx(size, flags);
482+	if (usize == 0) {
483+		return ALLOCM_ERR_OOM;
484+	}
485+	if (rsize != NULL) {
486+		*rsize = usize;
487+	}
488+	return ALLOCM_SUCCESS;
489+}
490+
491+#undef ALLOCM_LG_ALIGN
492+#undef ALLOCM_ALIGN
493+#undef ALLOCM_ZERO
494+#undef ALLOCM_NO_MOVE
495+
496+#undef ALLOCM_SUCCESS
497+#undef ALLOCM_ERR_OOM
498+#undef ALLOCM_ERR_NOT_MOVED
499+
500+/*
501+ * End compatibility functions.
502+ */
503+/******************************************************************************/
504 /*
505  * The following functions are used by threading libraries for protection of
506  * malloc during fork().
507@@ -3919,4 +4001,11 @@ jemalloc_postfork_child(void) {
508 	ctl_postfork_child(tsd_tsdn(tsd));
509 }
510 
511+void
512+_malloc_first_thread(void)
513+{
514+
515+	(void)malloc_mutex_first_thread();
516+}
517+
518 /******************************************************************************/
519diff --git a/src/malloc_io.c b/src/malloc_io.c
520index d7cb0f52..cda589c4 100644
521--- a/src/malloc_io.c
522+++ b/src/malloc_io.c
523@@ -75,6 +75,20 @@ wrtmessage(void *cbopaque, const char *s) {
524 
525 JEMALLOC_EXPORT void	(*je_malloc_message)(void *, const char *s);
526 
527+JEMALLOC_ATTR(visibility("hidden"))
528+void
529+wrtmessage_1_0(const char *s1, const char *s2, const char *s3, const char *s4) {
530+
531+	wrtmessage(NULL, s1);
532+	wrtmessage(NULL, s2);
533+	wrtmessage(NULL, s3);
534+	wrtmessage(NULL, s4);
535+}
536+
537+void	(*__malloc_message_1_0)(const char *s1, const char *s2, const char *s3,
538+    const char *s4) = wrtmessage_1_0;
539+__sym_compat(_malloc_message, __malloc_message_1_0, FBSD_1.0);
540+
541 /*
542  * Wrapper around malloc_message() that avoids the need for
543  * je_malloc_message(...) throughout the code.
544diff --git a/src/mutex.c b/src/mutex.c
545index 3f920f5b..88a7730c 100644
546--- a/src/mutex.c
547+++ b/src/mutex.c
548@@ -41,6 +41,17 @@ pthread_create(pthread_t *__restrict thread,
549 #ifdef JEMALLOC_MUTEX_INIT_CB
550 JEMALLOC_EXPORT int	_pthread_mutex_init_calloc_cb(pthread_mutex_t *mutex,
551     void *(calloc_cb)(size_t, size_t));
552+
553+#pragma weak _pthread_mutex_init_calloc_cb
554+int
555+_pthread_mutex_init_calloc_cb(pthread_mutex_t *mutex,
556+    void *(calloc_cb)(size_t, size_t))
557+{
558+
559+	return (((int (*)(pthread_mutex_t *, void *(*)(size_t, size_t)))
560+	    __libc_interposing[INTERPOS__pthread_mutex_init_calloc_cb])(mutex,
561+	    calloc_cb));
562+}
563 #endif
564 
565 void
566@@ -131,6 +142,16 @@ mutex_addr_comp(const witness_t *witness1, void *mutex1,
567 	}
568 }
569 
570+bool
571+malloc_mutex_first_thread(void) {
572+
573+#ifndef JEMALLOC_MUTEX_INIT_CB
574+	return (malloc_mutex_first_thread());
575+#else
576+	return (false);
577+#endif
578+}
579+
580 bool
581 malloc_mutex_init(malloc_mutex_t *mutex, const char *name,
582     witness_rank_t rank, malloc_mutex_lock_order_t lock_order) {
583