=> 0x7f8592fb2214 <g_type_check_value_holds+52>:	testb  $0x8,0x16(%rbp)
   0x7f8592fb2218 <g_type_check_value_holds+56>:	jne    0x7f8592fb2320 <g_type_check_value_holds+320>
   0x7f8592fb221e <g_type_check_value_holds+62>:	lea    0x21bf5b(%rip),%rdi        # 0x7f85931ce180
   0x7f8592fb2225 <g_type_check_value_holds+69>:	mov    %rsi,0x8(%rsp)
   0x7f8592fb222a <g_type_check_value_holds+74>:	callq  0x7f8592f87410 <g_static_rw_lock_reader_lock@plt>
   0x7f8592fb222f <g_type_check_value_holds+79>:	mov    0x8(%rsp),%rsi
   0x7f8592fb2234 <g_type_check_value_holds+84>:	mov    0x20(%rbp),%rax
   0x7f8592fb2238 <g_type_check_value_holds+88>:	test   %rax,%rax
   0x7f8592fb223b <g_type_check_value_holds+91>:	je     0x7f8592fb2258 <g_type_check_value_holds+120>
   0x7f8592fb223d <g_type_check_value_holds+93>:	mfence 
   0x7f8592fb2240 <g_type_check_value_holds+96>:	mov    0x0(%rbp),%eax
   0x7f8592fb2243 <g_type_check_value_holds+99>:	test   %eax,%eax
   0x7f8592fb2245 <g_type_check_value_holds+101>:	je     0x7f8592fb2258 <g_type_check_value_holds+120>
   0x7f8592fb2247 <g_type_check_value_holds+103>:	mov    0x20(%rbp),%rax
   0x7f8592fb224b <g_type_check_value_holds+107>:	mov    (%rax),%rax
   0x7f8592fb224e <g_type_check_value_holds+110>:	cmpq   $0x0,(%rax)