liblttng-ust-libc is used for instrumenting some calls to libc in a

program, without need for recompiling it.

This library defines a malloc() function that is instrumented with a

tracepoint. It also calls the libc malloc afterwards. When loaded with

LD_PRELOAD, it replaces the libc malloc() function, in effect

instrumenting all calls to malloc(). The same is performed for free().

See the "run" script for a usage example.