VPP mem preload
Internal VPP memory allocations rely on VPP main-heap, however when
using external libraries, esp. in plugins (e.g. OpenSSL library used by
the IKEv2 plugin), those external libraries usually manages memory using
the standard libc
free()/… calls. This, in turn, makes
use of the default libc heap.
VPP has no knowledge of this heap and tools such as memory traces cannot be used.
In order to enable the use of standard VPP debugging tools, this library replaces standard libc memory management calls with version using VPP main-heap.
To use it, you need to use the
LD_PRELOAD mechanism, e.g.
~# LD_PRELOAD=/usr/lib/x86_64-linux-gnu/libvppmem_preload.so /usr/bin/vpp -c /etc/vpp/startup.conf
You can then use tools such as memory traces as usual.