com.facebook.buck.cxx.ElfExtractSectionsStep.java Source code

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Here is the source code for com.facebook.buck.cxx.ElfExtractSectionsStep.java

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/*
 * Copyright 2016-present Facebook, Inc.
 *
 * 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.
 */

package com.facebook.buck.cxx;

import com.facebook.buck.core.build.execution.context.ExecutionContext;
import com.facebook.buck.io.filesystem.ProjectFilesystem;
import com.facebook.buck.shell.ShellStep;
import com.google.common.collect.ImmutableList;
import com.google.common.collect.ImmutableSet;
import java.nio.file.Path;

/** A step which extracts specific sections from an ELF file into a new ELF file. */
class ElfExtractSectionsStep extends ShellStep {

    private final ImmutableList<String> objcopyPrefix;
    private final ImmutableSet<String> sections;
    private final ProjectFilesystem inputFilesystem;
    private final Path input;
    private final ProjectFilesystem outputFilesystem;
    private final Path output;

    public ElfExtractSectionsStep(ImmutableList<String> objcopyPrefix, ImmutableSet<String> sections,
            ProjectFilesystem inputFilesystem, Path input, ProjectFilesystem outputFilesystem, Path output) {
        super(outputFilesystem.getRootPath());
        this.objcopyPrefix = objcopyPrefix;
        this.sections = sections;
        this.inputFilesystem = inputFilesystem;
        this.input = input;
        this.outputFilesystem = outputFilesystem;
        this.output = output;
    }

    @Override
    protected ImmutableList<String> getShellCommandInternal(ExecutionContext context) {
        ImmutableList.Builder<String> args = ImmutableList.builder();
        args.addAll(objcopyPrefix);
        for (String section : sections) {
            args.add("--only-section", section);
        }
        args.add(inputFilesystem.resolve(input).toString());
        args.add(outputFilesystem.resolve(output).toString());
        return args.build();
    }

    @Override
    public final String getShortName() {
        return "scrub_symbol_table";
    }
}