| | 15 | == Sample debugging session using Mdbg == |
| | 16 | |
| | 17 | For this example, we're gonna' use '''Mdbg.exe'''. To start debugging, make sure your Cobra sources are compiled with the '''-d''' switch: |
| | 18 | |
| | 19 | {{{ |
| | 20 | cobra.exe -d -compile d.cobra |
| | 21 | }}} |
| | 22 | |
| | 23 | For this example, let's assume '''d.cobra''' contains this: |
| | 24 | |
| | 25 | {{{ |
| | 26 | #!python |
| | 27 | sig SampleMethod(b as int) as int |
| | 28 | |
| | 29 | class A |
| | 30 | def main is shared |
| | 31 | a as SampleMethod = do(b as int) |
| | 32 | if b > 20 |
| | 33 | return b+5 |
| | 34 | return b+6 |
| | 35 | print a(21) |
| | 36 | print a(10) |
| | 37 | }}} |
| | 38 | |
| | 39 | After the command finished, you have an exe created. Fire up Mdbg like this: |
| | 40 | |
| | 41 | {{{ |
| | 42 | Mdbg.exe d.exe |
| | 43 | }}} |
| | 44 | |
| | 45 | You'll see output like this: |
| | 46 | |
| | 47 | {{{ |
| | 48 | run d.exe |
| | 49 | STOP: Breakpoint Hit |
| | 50 | 4: def main is shared |
| | 51 | }}} |
| | 52 | |
| | 53 | To start stepping through code, write '''next''' ( '''n''' has the same effect ). You'll see the debugger advance: |
| | 54 | |
| | 55 | {{{ |
| | 56 | [p#:0, t#:0] mdbg> next |
| | 57 | 5: a as SampleMethod = do(b as int) |
| | 58 | }}} |
| | 59 | |
| | 60 | Let's keep stepping until we reach the {{{ print a(21) }}} line: |
| | 61 | |
| | 62 | {{{ |
| | 63 | [p#:0, t#:0] mdbg> n |
| | 64 | 5: a as SampleMethod = do(b as int) |
| | 65 | [p#:0, t#:0] mdbg> n |
| | 66 | 9: print a(21) |
| | 67 | }}} |
| | 68 | |
| | 69 | If you want to step in that method and see what happens, press '''s'''. At any time, you can see the value of the variables by writing: |
| | 70 | {{{ |
| | 71 | print variable_name |
| | 72 | }}} |
| | 73 | |
| | 74 | and that will write the value of '''variable_name'''. Similar, you can just type '''print''' and that will write the value of all the variables in that context. |
| | 75 | |
| | 76 | If at any time you want to quit debugging, just write '''exit'''. |
| | 77 | |
| | 78 | Even though this example only covers the basics, I hope it's enough to get you started. |
| | 79 | |
