Trace system calls and signals. A diagnostic, debugging and instructional userspace utility.
strace is a diagnostic, debugging and instructional userspace utility for Linux. It is used to monitor interactions between processes and the Linux kernel, which include system calls, signal deliveries, and changes of process state. The operation of strace is made possible by the kernel feature known as ptrace.
Some Unixlike systems provide other diagnostic tools similar to strace, such as truss.
debugger traces os-kernel