=> 0x5938e9 <free+73>:	mov    (%eax),%esi
   0x5938eb <free+75>:	xor    %eax,%eax
   0x5938ed <free+77>:	mov    $0x1,%ecx
   0x5938f2 <free+82>:	cmpl   $0x0,%gs:0xc
   0x5938fa <free+90>:	je     0x5938fd <free+93>
   0x5938fc <free+92>:	lock cmpxchg %ecx,(%esi)
   0x593900 <free+96>:	jne    0x5950ee
   0x593906 <free+102>:	mov    %esi,%eax
   0x593908 <free+104>:	call   0x590290
   0x59390d <free+109>:	cmpl   $0x0,%gs:0xc
   0x593915 <free+117>:	je     0x593918 <free+120>
   0x593917 <free+119>:	lock subl $0x1,(%esi)
   0x59391b <free+123>:	jne    0x5950fa
   0x593921 <free+129>:	mov    0x8(%esp),%ebx
   0x593925 <free+133>:	mov    0xc(%esp),%esi
   0x593929 <free+137>:	add    $0x10,%esp