iDEFENSE Labs is pleased to announce the release of dltrace, a portable dynamic library call tracer. dltrace attempts to remain portable to all x86 platforms which support the execution of ELF binaries and expose a debugging interface via procfs or the ptrace() system call. The shared library call tracing is done at a level which allows all calls to all exported symbols in loaded libraries to be traced. In addition, dltrace does not rely on specific rtld exports to retrieve library and symbol information and is capable of determing function arguments dynamically via run-time disassembly. dltrace has been released as open source and is available for download from: http://labs.idefense.com Michael Sutton, Director, iDEFENSE Labs