Debugging

This section explains some tricks which can be used to debug test binaries.

Debug messages

The LTP framework supports TDEBUG flag test debug messages. These messages can be enabled using the -D parameter or setting LTP_ENABLE_DEBUG=1 environment variable (see Tests setup).

Tracing and debugging syscalls

The new test library runs the actual test (i.e. the test() function) in a forked process. To get stack trace of a crashing test in gdb it’s needed to set follow-fork-mode child.

To trace the test, please use strace -f to enable tracing also for the forked processes.