Re: [cdt-dev] Setting environment variables in gdb process programattica

[Marc Khouzam <marc.khouzam@xxxxxxxxxxxx>]

The environment used by GDB is computed by
org.eclipse.cdt.dsf.gdb.launching.LaunchUtils.getLaunchEnvironment(config);

This call is made in GDBBackend.launchGDBProcess(String[]);

See if you are setting the environment vars in same place as where they get read.
________________________________________
From: cdt-dev-bounces@xxxxxxxxxxx [cdt-dev-bounces@xxxxxxxxxxx] on behalf of drwootton@xxxxxxxxxx [drwootton@xxxxxxxxxx]
Sent: July 29, 2015 11:44 AM
To: cdt-dev@xxxxxxxxxxx
Subject: [cdt-dev] Setting environment variables in gdb process programattically

I need to set or modify an environment variable in the gdb process as part of the launch processing for my plugin. I was told I needed to do this by updating the build environment since gdb gets it's environment variables from the build environment, not the debug configuration.

I'm trying to do this in the launch method of my launch configuration delegate which extends GdbLaunchDelegate. I am able to update the C/C++ build variables in the project properties, but it seems like the update does not take effect until the next launch of the debug session. I can see the updates by looking in project properties in the first launch, so I'm wondering if I'm doing this too late or if there's more that I need to be doing.

The code that gets me access to the project properties looks like


        IEnvironmentVariableManager envManager = CCorePlugin.getDefault()
                .getBuildEnvironmentManager();
        IContributedEnvironment env = envManager.getContributedEnvironment();
        ICProjectDescription projectDescription = CoreModel.getDefault()
                .getProjectDescription(project, false);
        IEnvironmentVariable pythonPath = null;
        ICConfigurationDescription configDescription = projectDescription
                .getActiveConfiguration();
        pythonPath= env.getVariable("PYTHONPATH", configDescription);
          // Update pythonPath
        env.addVariable("PYTHONPATH", pythonPath,
                    IEnvironmentVariable.ENVVAR_REPLACE, ":",
                    configDescription);

Once I do this I call super.launch() to launch the debug session

Any suggestions what I might be doing wrong?

Thanks.

Dave



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