What are some alternatives?
When comparing strace and JTracer, you can also consider the following products
DTrace - DTrace is a performance analysis and troubleshooting tool for Solaris, Mac OS X and FreeBSD.
API Monitor - API Monitor is a software that monitors and displays API calls made by applications and services. Its a powerful tool for seeing how Windows and other applications work or tracking down problems that you have in your own applications
perf - Perf is a simple app monitoring solution paired with meaningful alerts.
Valgrind - Valgrind is an instrumentation framework for building dynamic analysis tools.
Magalix - Magalix is the autopilot of the cloud infrastructure.
Libcsdbg - C++ exception (and generic) stack trace debug suite