=> 0x67190e <free+46>:	mov    -0x4(%ecx),%eax
   0x671911 <free+49>:	lea    -0x8(%ecx),%edx
   0x671914 <free+52>:	test   $0x2,%al
   0x671916 <free+54>:	jne    0x671970 <free+144>
   0x671918 <free+56>:	test   $0x4,%al
   0x67191a <free+58>:	lea    0x140c(%ebx),%esi
   0x671920 <free+64>:	je     0x67192b <free+75>
   0x671922 <free+66>:	mov    %edx,%eax
   0x671924 <free+68>:	and    $0xfff00000,%eax
   0x671929 <free+73>:	mov    (%eax),%esi
   0x67192b <free+75>:	xor    %eax,%eax
   0x67192d <free+77>:	mov    $0x1,%ecx
   0x671932 <free+82>:	cmpl   $0x0,%gs:0xc
   0x67193a <free+90>:	je     0x67193d <free+93>
   0x67193c <free+92>:	lock cmpxchg %ecx,(%esi)
   0x671940 <free+96>:	jne    0x67312e