如何在 Ceedling 中使用 gdb？

Question

I want to debug the C source code under test when use Ceedling. I found that the following command could be used, but I could not set breakpoint. It seems the symbol information is not generated. I use the default settings in project.yml and I checked -g option is enabled in defaults.rb config file.

gdb --args -S rake test:sample_program
GNU gdb (GDB) (Cygwin 7.10.1-1) 7.10.1
Copyright (C) 2015 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
Reading symbols from ruby...(no debugging symbols found)...done.

Answer 1

Well, I find someway! In Ceedling project, the executable is located in \build\test\out\test_sample.out

I tried,

gdb build\test\out\test_sample.out

Now, all symbols are loaded and I can set breakpoint and step as well.

This may not be Ceedling way of debugging, but it works for me!!

Answer 2

Thanks SRAK

FYI, for MacOS, I used

lldb build/test/out/test_sample.out

since whichever gdb (installed by home brew) expects a different format.

Cheers,

Greg

Answer 3

For those of us using Visual Studio Code with the Ceedling Test Explorer extension, the following launch.json file (put inside the .vscode folder) can be used to debug with GDB:

{
    "version": "0.2.0",
    "configurations": [
        {
            // Use the following for the Ceedling Explorer Debug Configuration
            "name": "ceedling_gdb",
            "type": "cppdbg",
            "request": "launch",
            "program": "${workspaceFolder}/build/test/out/${command:ceedlingExplorer.debugTestExecutable}",
            "args": [],
            "stopAtEntry": false,
            "cwd": "${workspaceFolder}",
            "environment": [],
            "externalConsole": true,
            "MIMode": "gdb",
            // May omit the following if gdb is on the PATH
            "miDebuggerPath": "<path to gdb executable>",
            "setupCommands": [
                {
                    "description": "Enable pretty-printing for gdb",
                    "text": "-enable-pretty-printing",
                    "ignoreFailures": true
                }
            ]
        }
    ]
}

This will conveniently launch whichever test module you click the little bug icon.

Derived fromhttps://gist.github.com/bd2357/b2d69ab18849c1e2f70959eef426ff09