Failed in using LD_PRELOAD to hook mmap system call in qemu(through libvirt)

Dear sir:&nbsp; &nbsp; &nbsp; I want to hook mmap system call in qemu, and I use libvirt to passthrough the environment&nbsp;argument like this:<qemu:commandline&gt; <qemu:env name='LD_PRELOAD' value='/glibcHookMMAP.so'/&gt; </qemu:commandline&gt;&nbsp; &nbsp; But it failed. I can hardly find out what is the matter! The log in libvirt like this:ERROR: ld.so: object '/glibcHookMMAP.so' from LD_PRELOAD cannot be preloaded (cannot open shared object file): ignored.&nbsp; &nbsp; Firstly, I think it's the problem of authority. But the file glibcHookMMAP.so has been done with command `chmod 777`.&nbsp; &nbsp; My environment is as follows:&nbsp;Ubuntu 18.04.2 Linux 5.4.0-92&nbsp;libvirt 4.0.0&nbsp;qemu 2.11.1 &nbsp; &nbsp;&nbsp;Look forward to your feedbacks. &nbsp; &nbsp; Sincerely yours