Singular Manual: Source code debugger

| ### 3.9.3 Source code debugger The source code debugger (sdb) is an experimental feature, its interface may change in future versions of . To enable the use of the source code debugger has to be started with the option `-d` or `--sdb` (see Command line options). #### sdb commands Each sdb command consists of one character which may be followed by a parameter. `b` print backtrace of calling stack `c` continue `e` edit the current procedure and reload it (current call will be aborted) only available on UNIX systems `h`,`?` display help screen `n` execute current line, sdb break at next line `p` <identifier> display type and value of the variable given by <identifier> `Q` quit this session `q` <flags> quit debugger, set debugger flags(0,1,2) 0: continue, disable the debugger 1: continue 2: throw an error, return to toplevel #### Syntactical errors in procedures If was started using the command line option `-d` or `--sdb`, a syntactical error in a procedure will start the source code debugger instead of returning to the top level with an error message. The commands `q 1` and `q 2` are equivalent in this case. #### SDB breakpoints in procedures Up to seven SDB breakpoints can be set. To set a breakpoint at a procedure use `breakpoint`. (See breakpoint). These breakpoints can be cleared with the command `d breakpoint_no` from within the debugger or with `breakpoint(` proc_name `,-1);`.

User manual for Singular version 4.3.2, 2023, generated by texi2html.