How to use

createOrGet

method

in

com.oracle.objectfile.BuildDependency

@Override
public Iterable<BuildDependency> getDependencies(Map<Element, LayoutDecisionMap> decisions) {
  HashSet<BuildDependency> deps = ObjectFile.minimalDependencies(decisions, this);
  // our content (but not our size) depends on the offset and size
  // of the corresponding element
  LayoutDecision ourContent = decisions.get(this).getDecision(LayoutDecision.Kind.CONTENT);
  LayoutDecision elOffset = decisions.get(el).getDecision(LayoutDecision.Kind.OFFSET);
  LayoutDecision elSize = decisions.get(el).getDecision(LayoutDecision.Kind.SIZE);
  deps.add(BuildDependency.createOrGet(ourContent, elOffset));
  deps.add(BuildDependency.createOrGet(ourContent, elSize));
  return deps;
}

  @Override
  public Iterable<BuildDependency> getDependencies(Map<Element, LayoutDecisionMap> decisions) {
    HashSet<BuildDependency> deps = ObjectFile.minimalDependencies(decisions, this);
    // our content depends on the offset and size of strtab, and offset of symtab
    LayoutDecision ourContent = decisions.get(this).getDecision(LayoutDecision.Kind.CONTENT);
    LayoutDecision strtabSize = decisions.get(symtab.strtab).getDecision(LayoutDecision.Kind.SIZE);
    LayoutDecision strtabOffset = decisions.get(symtab.strtab).getDecision(LayoutDecision.Kind.OFFSET);
    LayoutDecision symtabOffset = decisions.get(symtab).getDecision(LayoutDecision.Kind.OFFSET);
    deps.add(BuildDependency.createOrGet(ourContent, strtabSize));
    deps.add(BuildDependency.createOrGet(ourContent, strtabOffset));
    deps.add(BuildDependency.createOrGet(ourContent, symtabOffset));
    return deps;
  }
}

@Override
public Iterable<BuildDependency> getDependencies(Map<Element, LayoutDecisionMap> decisions) {
  HashSet<BuildDependency> deps = ObjectFile.minimalDependencies(decisions, this);
  // our size is fixed;
  // our content depends on the offset and size of the ExportTrieElement
  LayoutDecision ourContent = decisions.get(this).getDecision(LayoutDecision.Kind.CONTENT);
  deps.add(BuildDependency.createOrGet(ourContent, decisions.get(export).getDecision(LayoutDecision.Kind.OFFSET)));
  deps.add(BuildDependency.createOrGet(ourContent, decisions.get(export).getDecision(LayoutDecision.Kind.SIZE)));
  return deps;
}

@Override
public Iterable<BuildDependency> getDependencies(Map<Element, LayoutDecisionMap> decisions) {
  HashSet<BuildDependency> deps = ObjectFile.minimalDependencies(decisions, this);
  LayoutDecision ourContent = decisions.get(this).getDecision(LayoutDecision.Kind.CONTENT);
  deps.add(BuildDependency.createOrGet(ourContent, decisions.get(el).getDecision(LayoutDecision.Kind.OFFSET)));
  deps.add(BuildDependency.createOrGet(ourContent, decisions.get(el).getDecision(LayoutDecision.Kind.SIZE)));
  return deps;
}

@Override
public Iterable<BuildDependency> getDependencies(Map<Element, LayoutDecisionMap> decisions) {
  // The Header depends on the section count and symbol table size and offset.
  // We don't use the default dependencies, because our offset mustn't depend on anything.
  HashSet<BuildDependency> dependencies = new HashSet<>();
  LayoutDecision ourContent = decisions.get(this).getDecision(LayoutDecision.Kind.CONTENT);
  LayoutDecision ourOffset = decisions.get(this).getDecision(LayoutDecision.Kind.OFFSET);
  LayoutDecision ourSize = decisions.get(this).getDecision(LayoutDecision.Kind.SIZE);
  LayoutDecision shtSize = decisions.get(sht).getDecision(LayoutDecision.Kind.SIZE);
  LayoutDecision symtOffset = decisions.get(symtab).getDecision(LayoutDecision.Kind.OFFSET);
  LayoutDecision symtSize = decisions.get(symtab).getDecision(LayoutDecision.Kind.SIZE);
  // Mark that our offset depends on our size.
  dependencies.add(BuildDependency.createOrGet(ourOffset, ourSize));
  dependencies.add(BuildDependency.createOrGet(ourContent, shtSize));
  dependencies.add(BuildDependency.createOrGet(ourContent, symtOffset));
  dependencies.add(BuildDependency.createOrGet(ourContent, symtSize));
  return dependencies;
}

@Override
public Iterable<BuildDependency> getDependencies(Map<Element, LayoutDecisionMap> decisions) {
  HashSet<BuildDependency> deps = ObjectFile.minimalDependencies(decisions, this);
  // our content (but not our size) depends on the offsets and sizes of every text section
  LayoutDecision ourContent = decisions.get(this).getDecision(LayoutDecision.Kind.CONTENT);
  for (Section s : getSections()) {
    MachOSection ms = (MachOSection) s;
    if (ms.flags.contains(SectionFlag.SOME_INSTRUCTIONS)) {
      deps.add(BuildDependency.createOrGet(ourContent, decisions.get(s).getDecision(LayoutDecision.Kind.OFFSET)));
      deps.add(BuildDependency.createOrGet(ourContent, decisions.get(s).getDecision(LayoutDecision.Kind.SIZE)));
    }
  }
  return deps;
}

@Override
public Iterable<BuildDependency> getDependencies(Map<Element, LayoutDecisionMap> decisions) {
  // our content depends on the section header table size and offset,
  // and, if present, the program header table size and offset
  // We don't use the default dependencies, because our offset mustn't depend on anything.
  // Also, our size MUST NOT depend on our content, because other offsets in the file
  // (e.g. SHT, PHT) must be decided before content, and we need to give a size so that
  // that nextAvailableOffset remains defined.
  // So, our size comes first.
  HashSet<BuildDependency> dependencies = new HashSet<>();
  LayoutDecision ourContent = decisions.get(this).getDecision(LayoutDecision.Kind.CONTENT);
  LayoutDecision ourOffset = decisions.get(this).getDecision(LayoutDecision.Kind.OFFSET);
  LayoutDecision ourSize = decisions.get(this).getDecision(LayoutDecision.Kind.SIZE);
  LayoutDecision shtSize = decisions.get(sht).getDecision(LayoutDecision.Kind.SIZE);
  LayoutDecision shtOffset = decisions.get(sht).getDecision(LayoutDecision.Kind.OFFSET);
  // Mark that our offset depends on our size.
  dependencies.add(BuildDependency.createOrGet(ourOffset, ourSize));
  dependencies.add(BuildDependency.createOrGet(ourContent, shtSize));
  dependencies.add(BuildDependency.createOrGet(ourContent, shtOffset));
  return dependencies;
}

public static HashSet<BuildDependency> basicDependencies(Map<Element, LayoutDecisionMap> decisions, Element el, boolean sizeOnContent, boolean vaddrOnOffset) {
  HashSet<BuildDependency> deps = new HashSet<>();
  /*
   * As a minimum, we specify that the offset and vaddr of an element depend on its size. This
   * is so that once we assign an offset or vaddr, the "next available" offset/vaddr can
   * always be computed -- using the size which we require to have already been decided.
   */
  deps.add(BuildDependency.createOrGet(decisions.get(el).getDecision(LayoutDecision.Kind.OFFSET), decisions.get(el).getDecision(LayoutDecision.Kind.SIZE)));
  if (decisions.get(el).getDecision(LayoutDecision.Kind.VADDR) != null) {
    deps.add(BuildDependency.createOrGet(decisions.get(el).getDecision(LayoutDecision.Kind.VADDR), decisions.get(el).getDecision(LayoutDecision.Kind.SIZE)));
  }
  if (sizeOnContent) {
    deps.add(BuildDependency.createOrGet(decisions.get(el).getDecision(LayoutDecision.Kind.SIZE), decisions.get(el).getDecision(LayoutDecision.Kind.CONTENT)));
  }
  // if we have a vaddr, by default it depends on our offset
  if (vaddrOnOffset && decisions.get(el).getDecision(LayoutDecision.Kind.VADDR) != null) {
    deps.add(BuildDependency.createOrGet(decisions.get(el).getDecision(LayoutDecision.Kind.VADDR), decisions.get(el).getDecision(LayoutDecision.Kind.OFFSET)));
  }
  return deps;
}

@Override
public Iterable<BuildDependency> getDependencies(Map<Element, LayoutDecisionMap> decisions) {
  HashSet<BuildDependency> deps = ObjectFile.minimalDependencies(decisions, this);
  // our content depends on strtab content
  LayoutDecision ourContent = decisions.get(this).getDecision(LayoutDecision.Kind.CONTENT);
  LayoutDecision strtabContent = decisions.get(strtab).getDecision(LayoutDecision.Kind.CONTENT);
  deps.add(BuildDependency.createOrGet(ourContent, strtabContent));
  /*
   * We also depend on the vaddr of any referenced defined symbol. It doesn't matter whether
   * we're dynamic! Every Mach-O section has a vaddr, even in a relocatable file.
   */
  for (Entry e : entries) {
    Section s = e.getDefinedSection();
    if (s != null) {
      deps.add(BuildDependency.createOrGet(ourContent, decisions.get(s).getDecision(LayoutDecision.Kind.VADDR)));
    }
  }
  return deps;
}

@Override
public Set<BuildDependency> getDependencies(Map<Element, LayoutDecisionMap> decisions) {
  HashSet<BuildDependency> deps = ObjectFile.minimalDependencies(decisions, getElement());
  LayoutDecision ourContent = decisions.get(getElement()).getDecision(LayoutDecision.Kind.CONTENT);
  LayoutDecision ourVaddr = decisions.get(getElement()).getDecision(LayoutDecision.Kind.VADDR);
  LayoutDecision rodataVaddr = decisions.get(getRodataSection()).getDecision(LayoutDecision.Kind.VADDR);
  deps.add(BuildDependency.createOrGet(ourContent, ourVaddr));
  deps.add(BuildDependency.createOrGet(ourContent, rodataVaddr));
  return deps;
}

@Override
public Iterable<BuildDependency> getDependencies(Map<Element, LayoutDecisionMap> decisions) {
  /* We use minimal deps because our size doesn't depend on our bytewise content. */
  HashSet<BuildDependency> deps = ObjectFile.minimalDependencies(decisions, this);
  /*
   * Our content depends on the content of our symtab. WHY? it's only the abstract content,
   * not the physical content. Try removing this one.
   */
  LayoutDecision ourContent = decisions.get(this).getDecision(LayoutDecision.Kind.CONTENT);
  // LayoutDecision symtabContent =
  // decisions.get(syms).getDecision(LayoutProperty.Kind.CONTENT);
  // deps.add(BuildDependency.createOrGet(ourContent, symtabContent));
  /* If we're dynamic, it also depends on the vaddr of all referenced sections. */
  if (isDynamic()) {
    Set<ELFSection> referenced = new HashSet<>();
    for (Entry ent : entries.keySet()) {
      referenced.add(ent.section);
    }
    for (ELFSection es : referenced) {
      deps.add(BuildDependency.createOrGet(ourContent, decisions.get(es).getDecision(LayoutDecision.Kind.VADDR)));
    }
  }
  return deps;
}

@Override
public Iterable<BuildDependency> getDependencies(Map<Element, LayoutDecisionMap> decisions) {
  ArrayList<BuildDependency> ourDeps = new ArrayList<>(ObjectFile.defaultDependencies(decisions, this));
  // we depend on the contents of our strtab
  ourDeps.add(BuildDependency.createOrGet(decisions.get(this).getDecision(LayoutDecision.Kind.CONTENT), decisions.get(strtab).getDecision(LayoutDecision.Kind.CONTENT)));
  // if we're dynamic, we also depend on vaddrs of any sections into which our symbols refer
  if (isDynamic()) {
    Set<ELFSection> referencedSections = new HashSet<>();
    for (Entry ent : entries) {
      ELFSection es = ent.getReferencedSection();
      if (es != null) {
        referencedSections.add(es);
      }
    }
    for (ELFSection es : referencedSections) {
      ourDeps.add(BuildDependency.createOrGet(decisions.get(this).getDecision(LayoutDecision.Kind.CONTENT), decisions.get(es).getDecision(LayoutDecision.Kind.VADDR)));
    }
  }
  return ourDeps;
}

@Override
public Iterable<BuildDependency> getDependencies(Map<Element, LayoutDecisionMap> decisions) {
  /*
   * Our contents depend on
   *
   * - the content, size and offset of shstrtab (Q. Why content? A. Because we write
   * string *indices*.)
   *
   * - the size and offset of every other element in the file. (Q. Why size? A. Because
   * the SHT entry includes the size.)
   *
   * - the vaddrs of every allocated section
   */
  HashSet<BuildDependency> deps = ObjectFile.defaultDependencies(decisions, this);
  LayoutDecision ourContent = decisions.get(this).getDecision(LayoutDecision.Kind.CONTENT);
  // to construct a dependency, first we must have constructed the decisions
  deps.add(BuildDependency.createOrGet(ourContent, decisions.get(shstrtab).getDecision(LayoutDecision.Kind.SIZE)));
  deps.add(BuildDependency.createOrGet(ourContent, decisions.get(shstrtab).getDecision(LayoutDecision.Kind.OFFSET)));
  deps.add(BuildDependency.createOrGet(ourContent, decisions.get(shstrtab).getDecision(LayoutDecision.Kind.CONTENT)));
  decisions.get(shstrtab).getDecision(LayoutDecision.Kind.OFFSET);
  decisions.get(shstrtab).getDecision(LayoutDecision.Kind.CONTENT);
  for (Element e : getElements()) {
    if (e != this && e != shstrtab) {
      deps.add(BuildDependency.createOrGet(ourContent, decisions.get(e).getDecision(LayoutDecision.Kind.OFFSET)));
      deps.add(BuildDependency.createOrGet(ourContent, decisions.get(e).getDecision(LayoutDecision.Kind.SIZE)));
    }
  }
  return deps;
}

deps.add(BuildDependency.createOrGet(ourOffset, hdrOffset));
deps.add(BuildDependency.createOrGet(ourOffset, hdrSize));
    deps.add(BuildDependency.createOrGet(nextOffset, prevOffset));
    deps.add(BuildDependency.createOrGet(nextOffset, prevSize));
  deps.add(BuildDependency.createOrGet(ourContent, nextOffset));
  deps.add(BuildDependency.createOrGet(ourContent, nextSize));
  prevOffset = nextOffset;
  prevSize = nextSize;
LayoutDecision relocOffset = decisions.get(reloctable).getDecision(LayoutDecision.Kind.OFFSET);
LayoutDecision relocSize = decisions.get(reloctable).getDecision(LayoutDecision.Kind.SIZE);
deps.add(BuildDependency.createOrGet(relocOffset, prevOffset));
deps.add(BuildDependency.createOrGet(relocOffset, prevSize));
deps.add(BuildDependency.createOrGet(ourContent, relocOffset));
deps.add(BuildDependency.createOrGet(ourContent, relocSize));
deps.add(BuildDependency.createOrGet(symtabOffset, relocOffset));
deps.add(BuildDependency.createOrGet(symtabOffset, relocSize));

deps.add(BuildDependency.createOrGet(ourContent, decisions.get(s).getDecision(LayoutDecision.Kind.SIZE)));
deps.add(BuildDependency.createOrGet(ourContent, decisions.get(s).getDecision(LayoutDecision.Kind.OFFSET)));
  deps.add(BuildDependency.createOrGet(ourContent, decisions.get(s).getDecision(LayoutDecision.Kind.VADDR)));
    if (e instanceof MachORelocationElement && ((MachORelocationElement) e).relocatesSegment(this)) {
      deps.add(BuildDependency.createOrGet(ourContent, decisions.get(e).getDecision(LayoutDecision.Kind.OFFSET)));

@Override
public Iterable<BuildDependency> getDependencies(Map<Element, LayoutDecisionMap> decisions) {
  // our content depends on the offset of every section we're going to reference
  HashSet<BuildDependency> deps = ObjectFile.defaultDependencies(decisions, this);
  ArrayList<Section> requiredOffsets = new ArrayList<>();
  for (LoadCommand c : loadCommands) {
    if (c instanceof SymtabCommand) {
      SymtabCommand syms = (SymtabCommand) c;
      for (Symbol sym : syms.symtab) {
        if (sym.isDefined() && sym.isFunction() && !sym.isAbsolute()) {
          Section s = sym.getDefinedSection();
          assert s != null;
          requiredOffsets.add(s);
        }
      }
    }
  }
  LayoutDecision ourContent = decisions.get(this).getDecision(LayoutDecision.Kind.CONTENT);
  for (Section s : requiredOffsets) {
    deps.add(BuildDependency.createOrGet(ourContent, decisions.get(s).getDecision(LayoutDecision.Kind.OFFSET)));
  }
  return deps;
}

      deps.add(BuildDependency.createOrGet(decisions.get(e).getDecision(LayoutDecision.Kind.OFFSET), decisions.get(prev).getDecision(LayoutDecision.Kind.OFFSET)));
    deps.add(BuildDependency.createOrGet(decisions.get(s.get(0)).getDecision(LayoutDecision.Kind.OFFSET),
            decisions.get(prevNonEmptySegment.get(prevNonEmptySegment.size() - 1)).getDecision(LayoutDecision.Kind.OFFSET)));
      deps.add(BuildDependency.createOrGet(decisions.get(s.get(0)).getDecision(LayoutDecision.Kind.VADDR),
              decisions.get(prevNonEmptySegment.get(prevNonEmptySegment.size() - 1)).getDecision(LayoutDecision.Kind.VADDR)));
  deps.add(BuildDependency.createOrGet(decisions.get(this).getDecision(LayoutDecision.Kind.CONTENT), decisions.get(cmd).getDecision(LayoutDecision.Kind.SIZE)));
deps.add(BuildDependency.createOrGet(decisions.get(this).getDecision(LayoutDecision.Kind.OFFSET), decisions.get(this).getDecision(LayoutDecision.Kind.SIZE)));
  for (Element el : seg) {
    for (LoadCommand cmd : loadCommands) {
      deps.add(BuildDependency.createOrGet(decisions.get(el).getDecision(LayoutDecision.Kind.OFFSET), decisions.get(cmd).getDecision(LayoutDecision.Kind.OFFSET)));
  Segment64Command segCmd = (Segment64Command) seg;
  if (previousSegCmd != null) {
    deps.add(BuildDependency.createOrGet(decisions.get(segCmd).getDecision(LayoutDecision.Kind.OFFSET), decisions.get(previousSegCmd).getDecision(LayoutDecision.Kind.OFFSET)));
  if (!(cmd instanceof Segment64Command)) {
    if (previousCmd != null) {
      deps.add(BuildDependency.createOrGet(decisions.get(cmd).getDecision(LayoutDecision.Kind.OFFSET), decisions.get(previousCmd).getDecision(LayoutDecision.Kind.OFFSET)));
    } else {
      firstNonSegmentCmd = cmd;
  deps.add(BuildDependency.createOrGet(decisions.get(firstNonSegmentCmd).getDecision(LayoutDecision.Kind.OFFSET), decisions.get(previousSegCmd).getDecision(LayoutDecision.Kind.OFFSET)));

BuildDependency dep = BuildDependency.createOrGet(d, offsetBootstrapDecision);
l1.add(dep);
l2.add(dep);