Function extent_hooks_prep

deps/jemalloc/test/include/test/extent_hooks.h:282–289

}

static void
extent_hooks_prep(void) {
	size_t sz;

	sz = sizeof(default_hooks);
	assert_d_eq(mallctl("arena.0.extent_hooks", (void *)&default_hooks, &sz,
	    NULL, 0), 0, "Unexpected mallctl() error");
}