SWI-Prolog -- tbacktrace/1

Availability::- use_module(library(threadutil)).(can be autoloaded)

[det]tbacktrace(+Thread)

[det]tbacktrace(+Thread, +Options)

Print a backtrace for Thread to the stream user_error of the calling thread. This is achieved by inserting an interrupt into Thread using call_in_thread/2. Options:

depth(+MaxFrames): Number of stack frames to show. Default is the current Prolog flag backtrace_depth or 20.

Other options are passed to get_prolog_backtrace/3.

bug: call_in_thread/2 may not process the event.

History

Introduced in 8.1.21 (👉8dae7f0) tbacktrace/1,2: print the stack of another thread in the console for debugging purposes.