Hi! I made a simple program to try this out with the downloadable binaries for 0.1.0 but I ended up with this on my ubuntu 19.04 x86_64 machine:

$ RUST_BACKTRACE=1 LD_PRELOAD=./libmemory_profiler.so ./memleak
thread '' panicked at 'failed to initialize perf_event_open: Os { code: 1, kind: PermissionDenied, message: "Operation not permitted" }', src/libcore/result.rs:999:5
stack backtrace:
0: std::sys::unix::backtrace::tracing::imp::unwind_backtrace
at src/libstd/sys/unix/backtrace/tracing/gcc_s.rs:39
1: std::panicking::default_hook::{{closure}}
at src/libstd/sys_common/backtrace.rs:71
at src/libstd/sys_common/backtrace.rs:59
at src/libstd/panicking.rs:197
2: std::panicking::rust_panic_with_hook
at src/libstd/panicking.rs:211
at src/libstd/panicking.rs:474
3: std::panicking::continue_panic_fmt
at src/libstd/panicking.rs:381
4: rust_begin_unwind
at src/libstd/panicking.rs:308
5: core::panicking::panic_fmt
at src/libcore/panicking.rs:85
6: core::result::unwrap_failed
at /rustc/00859e3e653973120006aaf3227823062dde1ba7/src/libcore/macros.rs:18
7: std::sync::once::Once::call_once::{{closure}}
at /rustc/00859e3e653973120006aaf3227823062dde1ba7/src/libcore/result.rs:827
at preload/src/unwind.rs:108
at /rustc/00859e3e653973120006aaf3227823062dde1ba7/src/libcore/ops/function.rs:231
at /home/travis/.cargo/registry/src/github.com-1ecc6299db9ec823/lazy_static-1.3.0/src/inline_lazy.rs:28
at /rustc/00859e3e653973120006aaf3227823062dde1ba7/src/libstd/sync/once.rs:220
8: std::sync::once::Once::call_inner
at src/libstd/sync/once.rs:387
9: memory_profiler::unwind::grab
at /rustc/00859e3e653973120006aaf3227823062dde1ba7/src/libstd/sync/once.rs:220
at /home/travis/.cargo/registry/src/github.com-1ecc6299db9ec823/lazy_static-1.3.0/src/inline_lazy.rs:27
at /home/travis/build/nokia/memory-profiler/<::lazy_static::__lazy_static_internal macros>:12
at /home/travis/build/nokia/memory-profiler/<::lazy_static::__lazy_static_internal macros>:13
at preload/src/unwind.rs:132
10: malloc
at preload/src/lib.rs:1423
at preload/src/lib.rs:1459
11:
12:
13:
14:
Aborted (core dumped)

My simple program which I made for the test purpose:
`
#include <stdio.h>
#include <malloc.h>
int main()
{
printf("lets leak some memory\n");

    while (1) {
            char *p = malloc(1024);
            sleep(1);
    }

    return 0;

}
`