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list commands prints a set of lines, but I need one single line, where I am and where an error has probably occurred.
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To execute one line of code, type "step" or "s". If the line to be executed is a function call, gdb will step into that function and start executing its code one line at a time. If you want to execute the entire function with one keypress, type "next" or "n".
(gdb) help list List specified function or line. With no argument, lists ten more lines after or around previous listing. "list -" lists the ten lines before a previous ten-line listing. One argument specifies a line, and ten lines are listed around that line.
To print a backtrace of the entire stack, use the backtrace command, or its alias bt . This command will print one line per frame for frames in the stack. By default, all stack frames are printed. You can stop the backtrace at any time by typing the system interrupt character, normally Ctrl-c .
Enables automatic displaying of certain expressions each time GDB stops at a breakpoint or after a step.
The 'frame' command will give you what you are looking for. (This can be abbreviated just 'f'). Here is an example:
(gdb) frame \#0 zmq::xsub_t::xrecv (this=0x617180, msg_=0x7ffff00008e0) at xsub.cpp:139 139 int rc = fq.recv (msg_); (gdb) Without an argument, 'frame' just tells you where you are at (with an argument it changes the frame). More information on the frame command can be found here.
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