=> 0x7f4b8d832c81 <cairo_set_source+1>:	mov    0x4(%rdi),%eax
   0x7f4b8d832c84 <cairo_set_source+4>:	mov    %rdi,%rbx
   0x7f4b8d832c87 <cairo_set_source+7>:	test   %eax,%eax
   0x7f4b8d832c89 <cairo_set_source+9>:	jne    0x7f4b8d832ca2 <cairo_set_source+34>
   0x7f4b8d832c8b <cairo_set_source+11>:	test   %rsi,%rsi
   0x7f4b8d832c8e <cairo_set_source+14>:	je     0x7f4b8d832caf <cairo_set_source+47>
   0x7f4b8d832c90 <cairo_set_source+16>:	mov    0x4(%rsi),%eax
   0x7f4b8d832c93 <cairo_set_source+19>:	test   %eax,%eax
   0x7f4b8d832c95 <cairo_set_source+21>:	jne    0x7f4b8d832ca4 <cairo_set_source+36>
   0x7f4b8d832c97 <cairo_set_source+23>:	mov    0x20(%rdi),%rax
   0x7f4b8d832c9b <cairo_set_source+27>:	callq  *0x50(%rax)
   0x7f4b8d832c9e <cairo_set_source+30>:	test   %eax,%eax
   0x7f4b8d832ca0 <cairo_set_source+32>:	jne    0x7f4b8d832ca4 <cairo_set_source+36>
   0x7f4b8d832ca2 <cairo_set_source+34>:	pop    %rbx
   0x7f4b8d832ca3 <cairo_set_source+35>:	retq   
   0x7f4b8d832ca4 <cairo_set_source+36>:	mov    %rbx,%rdi