contents/namespace/vndkinsystem.cc

/*
 * Copyright (C) 2019 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

// This namespace is where no-vendor-variant VNDK libraries are loaded for a
// vendor process.  Note that we do not simply export these libraries from the
// "system" namespace, because in some cases both the core variant and the
// vendor variant of a VNDK library may be loaded.  In such cases, we do not
// want to eliminate double-loading because doing so means the global states
// of the library would be shared.
//
// Only the no-vendor-variant VNDK libraries are allowed in this namespace.
// This is to ensure that we do not load libraries needed by no-vendor-variant
// VNDK libraries into vndk_in_system namespace.

#include "linkerconfig/namespacebuilder.h"

#include <android-base/strings.h>

#include "linkerconfig/environment.h"

using android::linkerconfig::modules::Namespace;

namespace android {
namespace linkerconfig {
namespace contents {
Namespace BuildVndkInSystemNamespace([[maybe_unused]] const Context& ctx) {
  Namespace ns("vndk_in_system",
               /*is_isolated=*/true,
               /*is_visible=*/false);

  // The search paths here should be kept the same as that of the 'system' namespace.
  ns.AddSearchPath("/system/${LIB}");
  ns.AddSearchPath(Var("SYSTEM_EXT") + "/${LIB}");

  if (android::linkerconfig::modules::IsVndkInSystemNamespace()) {
    ns.AddAllowedLib(Var("VNDK_USING_CORE_VARIANT_LIBRARIES"));
  }

  AddLlndkLibraries(ctx,
                    &ns,
                    ctx.IsProductSection() ? VndkUserPartition::Product
                                           : VndkUserPartition::Vendor);
  ns.GetLink("vndk").AllowAllSharedLibs();

  if (ctx.IsVendorSection() || ctx.IsProductSection()) {
    ns.GetLink("default").AllowAllSharedLibs();
  }

  return ns;
}
}  // namespace contents
}  // namespace linkerconfig
}  // namespace android