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Jidong Xiao
2023-09-10 23:58:47 -04:00
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labs/03_debugging/README.md
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Set a breakpoint at some point in your code just before (in order of execution!) you think the first error Set a breakpoint at some point in your code just before (in order of execution!) you think the first error
might occur. Finally, in order to actually start running the program under control of the debugger, might occur. Finally, in order to actually start running the program under control of the debugger,
you will need to type *run* at the gdb command line. you will need to type *run* at the gdb command line.
4. Stepping through the program: 4. Stepping through the program:
You can step through the code using the commands *next* (move to the next line of code), *step* (enter You can step through the code using the commands *next* (move to the next line of code), *step* (enter the function), and *finish* (leave the function). The command *continue* allows you to move to the next breakpoint.
the function), and *finish* (leave the function). The command *continue* allows you to move to the
next breakpoint.
5. Examining the content of variables: 5. Examining the content of variables:
- You can use *print* to see the values of variables and expressions. - You can use *print* to see the values of variables and expressions.
- You can use the command *display* to see the contents of a particular variable or expression when the - You can use the command *display* to see the contents of a particular variable or expression when the program is stopped.
program is stopped.
6. Program flow: 6. Program flow:
The command *backtrace* can be used to show the contents of the call stack. This is particularly The command *backtrace* can be used to show the contents of the call stack. This is particularly
important if your program crashes. Unfortunately, the crash often occurs inside C++ library code. important if your program crashes. Unfortunately, the crash often occurs inside C++ library code.