Method getExtBcPath

svf/lib/Util/ExtAPI.cpp:136–220

Get extapi.bc path

// Get extapi.bc path
std::string ExtAPI::getExtBcPath()
{
    // Try to locate extapi.bc in the following order:
    // 1. If setExtBcPath() has been called, use that path.
    // 2. If the command line argument -extapi=path/to/extapi.bc is provided, use that path.
    // 3. If SVF is being developed and used directly from a build directory, try the build dir (SVF_BUILD_DIR).
    // 4. If the SVF_DIR environment variable is set, try $SVF_DIR with the standard relative path.
    // 5. If installed via npm, use `npm root` and append the standard relative path.
    // 6. As a last resort, use the directory of the loaded libSVFCore.so (or .dylib) and append extapi.bc.

    std::vector<std::string> candidatePaths;

    // 1. Use path set by setExtBcPath()
    if (!extBcPath.empty())
        return extBcPath;

    // 2. Use command line argument -extapi=...
    if (setExtBcPath(Options::ExtAPIPath()))
    {
        return extBcPath;
    }
    else
    {
        candidatePaths.push_back(Options::ExtAPIPath());
    }

    // 3. SVF developer: try build directory (SVF_BUILD_DIR)
    if (setExtBcPath(SVF_BUILD_DIR "/lib/extapi.bc"))
    {
        return extBcPath;
    }
    else
    {
        candidatePaths.push_back(SVF_BUILD_DIR "/lib/extapi.bc");
    }

    // 4. Use $SVF_DIR environment variable + standard relative path
    if (setExtBcPath(getFilePath("SVF_DIR")))
    {
        return extBcPath;
    }
    else
    {
        candidatePaths.push_back(getFilePath("SVF_DIR"));
    }

    // 5. Use npm root + standard relative path (for npm installations)
    if (setExtBcPath(getFilePath("npm root")))
    {
        return extBcPath;
    }
    else
    {
        candidatePaths.push_back(getFilePath("npm root"));
    }

    // 6. Use the directory of the loaded libSVFCore.so/.dylib + extapi.bc
    std::string soPath = getCurrentSOPath();