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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-03-09 13:19:48 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-03-09 13:20:02 +0000 |
commit | 58daab21cd043e1dc37024a7f99b396788372918 (patch) | |
tree | 96771e43bb69f7c1c2b0b4f7374cb74d7866d0cb /web/server/h2o/libh2o/deps/mruby/doc/guides/debugger.md | |
parent | Releasing debian version 1.43.2-1. (diff) | |
download | netdata-58daab21cd043e1dc37024a7f99b396788372918.tar.xz netdata-58daab21cd043e1dc37024a7f99b396788372918.zip |
Merging upstream version 1.44.3.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'web/server/h2o/libh2o/deps/mruby/doc/guides/debugger.md')
-rw-r--r-- | web/server/h2o/libh2o/deps/mruby/doc/guides/debugger.md | 370 |
1 files changed, 370 insertions, 0 deletions
diff --git a/web/server/h2o/libh2o/deps/mruby/doc/guides/debugger.md b/web/server/h2o/libh2o/deps/mruby/doc/guides/debugger.md new file mode 100644 index 000000000..72f2c2b32 --- /dev/null +++ b/web/server/h2o/libh2o/deps/mruby/doc/guides/debugger.md @@ -0,0 +1,370 @@ +# How to Use the mruby Debugger + +copyright (c) 2014 Specified Non-Profit Corporation mruby Forum + +## 1. Summary + +This file documents the mruby debugger ('mrdb') methods. + +## 2 Debugging with mrdb + +## 2.1 Building mrdb + +The trunk of the mruby source tree, with the most recent mrdb, can be checked out with the following command: + +```bash +$ git clone https://github.com/mruby/mruby.git +``` + +To run the `make` command: + +```bash +$ cd mruby +$ make +``` + +By default, the `make` command will install the debugger files into mruby/bin. + +You can add the path for mrdb on your host environment with the following command: + +```bash +$ echo "export PATH=\$PATH:MRUBY_ROOT/bin" >> ~/.bashrc +$ source ~/.bashrc +``` + +`*MRUBY_ROOT` is the directory in which mruby source code will be installed. + +To confirm mrdb was installed properly, run mrdb with the `--version` option: + +```bash +$ mrdb --version +mruby 1.3.0 (2017-7-4) +``` + +## 2.2 Basic Operation + +### 2.2.1 Debugging mruby Script Files (rb file) with mrdb + +To invoke the mruby debugger, just type `mrdb`. + +To specify the script file: + +```bash +$ mrdb [option] file name +``` + +For example: Debugging sample.rb + +```bash +$ mrdb sample.rb +``` + +You can execute the shell commands listed below: + +|command|description| +|:-:|:--| +|run|execute programs| +|step|execute stepping| +|continue|execute continuing program| +|break|configure the breaking point| +|delete|deleting the breaking points| +|disable|disabling the breaking points| +|enable|enabling the breaking points| +|info breakpoints|showing list of the breaking points| +|print|evaluating and printing the values of the mruby expressions in the script| +|list|displaying the source cords| +|help|showing help| +|quit|terminating the mruby debugger| + +### 2.2.2 Debugging mruby Binary Files (mrb file) with mrdb + +You can debug the mruby binary files. + +#### 2.2.2.1 Debugging the binary files + +* notice +To debug mruby binary files, you need to compile mruby files with option `-g`. + +```bash +$ mrbc -g sample.rb +``` + +You can debug the mruby binary files with following command and the option `-b`. + +```bash +$ mrdb -b sample.mrb +``` + +Then you can execute all debugger shell commands. + +#### Break Command + +You can use any breakpoint to stop the program by specifying the line number and method name. +The breakpoint list will be displayed after you have set the breakpoint successfully. + +Usage: + +``` +break [file:]linenum +b [file:]linenum +break [class:]method +b [class:]method +``` + +The breakpoint will be ordered in serial from 1. +The number, which was given to the deleted breakpoint, will never be given to another breakpoint again. + +You can give multiple breakpoints to specified the line number and method. +Be ware that breakpoint command will not check the validity of the class name and method name. + +You can get the current breakpoint information by the following options. + +breakpoint breakpoint number : file name. line number + +breakpoint breakpoint number : [class name,] method name + +#### Continue Command + +Usage: + +``` +continue [N] +c [N] +``` + +N: the next breakpoint number + +When resuming the program, it will stop at breakpoint N (N-1 breakpoint will be ignored). + +When you run the `continue` command without specifying N, the program will be stopped at the next breakpoint. + +Example: + +``` +(foo.rb:1) continue 3 +``` + +This will resume the program and stop it at the third breakpoint. + +#### Delete Command + +This will delete the specified breakpoint. + +Usage: + +``` +delete [breakpoint-no] +d [breakpoint-no] +``` + +breakpoint-no: breakpoint number + +Example: + +``` +(foo.rb:1) delete +``` + +This will delete all of the breakpoints. + +``` +(foo.rb:1) delete 1 3 +``` + +This will delete the breakpoint at 1 and 3. + +#### Disable Command + +This will disable the specified breakpoint. + +Usage: + +``` +disable [breakpoint-no] +dis [breakpoint-no] +``` + +reappointing: breakpoint number + +Example: + +``` +(foo.rb:1) disable +``` + +Use `disable` if you would like to disable all of the breakpoints. + +``` +(foo.rb:1) disable 1 3 +``` + +This will disable the breakpoints at 1 and 3. + +#### Enable Command + +This will enable the specified breakpoints. + +Usage: + +``` +enable [breakpoint-no] +e [breakpoint-no] +``` + +breakpoint-no: breakpoint number + +Example: + +``` +(foo.rb:1) enable +``` + +Enabling all breakpoints +``` +(foo.rb:1) enable 1 3 +``` + +Enabling the breakpoint 1 and 3 + +#### eval command + +Evaluating the string as source code and printing the value. + +Same as print command, please see print command. + +#### help command + +Displaying the help message. + +Usage: + +``` +help [command] +h [command] +``` + +Typing `help` without any options will display the command list. + +#### Info Breakpoints Command + +Displaying the specified breakpoint information. + +Usage: + +``` +info breakpoints [breakpoint-no] +i b [breakpoint-no] +``` + +breakpoint-no: breakpoint number + +Typing "info breakpoints" without ant option will display all breakpoint information. +Example: + +``` +(sample.rb:1) info breakpoints +Num Type Enb What +1 breakpoint y at sample.rb:3 -> file name,line number +2 breakpoint n in Sample_class:sample_class_method -> [class:]method name +3 breakpoint y in sample_global_method +``` + +Displaying the specified breakpoint number: + +``` +(foo.rb:1) info breakpoints 1 3 +Num Type Enb What +1 breakpoint y at sample.rb:3 +3 breakpoint y in sample_global_method +``` + +#### List Command + +To display the code of the source file. + +Usage: + +``` +list [filename:]first[,last] +l [filename]:first[,last] +``` + +first: the opening row number +last : the closing row number + +When you specify the `first`, but not the `last` option, you will receive 10 rows. +When you do not specify both the `first` and `last` options, you will receive the next 10 rows. + +Example: + +``` +Specifying file name and first row number +sample.rb:1) list sample2.rb:5 +``` + +Specifying the file name and the first and last row number: + +``` +(sample.rb:1) list sample2.rb:6,7 +``` + +#### Print Command + +Evaluating the string as source code and printing the value. + +Usage: + +``` +print [expr] +p [expr] +``` + +expr: expression + +The expression is mandatory. +The displayed expressions will be serially ordered from 1. +If an exception occurs, the exception information will be displayed and the debugging will be continued. + +Example: + +``` +(sample.rb:1) print 1+2 +$1 = 3 +(sample.rb:1) print self +$2 = main +``` + +Below is the case of the exception: + +``` +(sample.rb:1) print (1+2 +$1 = SyntaxError: line 1: syntax error, unexpected $end, expecting ')' +``` + +#### Quit Command + +Quitting the debugger. + +Usage: + +``` +quit +q +``` + +#### Run Command + +Running the program and stopping at the first breakpoint. + +Usage: + +``` +run +r +``` + +#### Step Command + +This will run the program step by step. +When the method and the block are invoked, the program will be stop at the first row. +The program, which is developed in C, will be ignored. |