=> 0x7fce1904dc2d <free+29>:	mov    -0x8(%rdi),%rsi
   0x7fce1904dc31 <free+33>:	lea    -0x10(%rdi),%r8
   0x7fce1904dc35 <free+37>:	test   $0x2,%sil
   0x7fce1904dc39 <free+41>:	jne    0x7fce1904dca8 <free+152>
   0x7fce1904dc3b <free+43>:	and    $0x4,%esi
   0x7fce1904dc3e <free+46>:	lea    0x3011fb(%rip),%rbx        # 0x7fce1934ee40
   0x7fce1904dc45 <free+53>:	je     0x7fce1904dc53 <free+67>
   0x7fce1904dc47 <free+55>:	mov    %r8,%rax
   0x7fce1904dc4a <free+58>:	and    $0xfffffffffc000000,%rax
   0x7fce1904dc50 <free+64>:	mov    (%rax),%rbx
   0x7fce1904dc53 <free+67>:	mov    $0x1,%esi
   0x7fce1904dc58 <free+72>:	xor    %eax,%eax
   0x7fce1904dc5a <free+74>:	cmpl   $0x0,0x304987(%rip)        # 0x7fce193525e8
   0x7fce1904dc61 <free+81>:	je     0x7fce1904dc6f <free+95>
   0x7fce1904dc63 <free+83>:	lock cmpxchg %esi,(%rbx)
   0x7fce1904dc67 <free+87>:	jne    0x7fce1904f1cd