cmdline/cmdline.h [38:79]:
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namespace art {

// TODO: Move to <runtime/utils.h> and remove all copies of this function.
static bool LocationToFilename(const std::string& location, InstructionSet isa,
                               std::string* filename) {
  bool has_system = false;
  bool has_cache = false;
  // image_location = /system/framework/boot.art
  // system_image_filename = /system/framework/<image_isa>/boot.art
  std::string system_filename(GetSystemImageFilename(location.c_str(), isa));
  if (OS::FileExists(system_filename.c_str())) {
    has_system = true;
  }

  bool have_android_data = false;
  bool dalvik_cache_exists = false;
  bool is_global_cache = false;
  std::string dalvik_cache;
  GetDalvikCache(GetInstructionSetString(isa), false, &dalvik_cache,
                 &have_android_data, &dalvik_cache_exists, &is_global_cache);

  std::string cache_filename;
  if (have_android_data && dalvik_cache_exists) {
    // Always set output location even if it does not exist,
    // so that the caller knows where to create the image.
    //
    // image_location = /system/framework/boot.art
    // *image_filename = /data/dalvik-cache/<image_isa>/boot.art
    std::string error_msg;
    if (GetDalvikCacheFilename(location.c_str(), dalvik_cache.c_str(),
                               &cache_filename, &error_msg)) {
      has_cache = true;
    }
  }
  if (has_system) {
    *filename = system_filename;
    return true;
  } else if (has_cache) {
    *filename = cache_filename;
    return true;
  } else {
    return false;
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patchoat/patchoat.cc [51:91]:
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namespace art {

static bool LocationToFilename(const std::string& location, InstructionSet isa,
                               std::string* filename) {
  bool has_system = false;
  bool has_cache = false;
  // image_location = /system/framework/boot.art
  // system_image_filename = /system/framework/<image_isa>/boot.art
  std::string system_filename(GetSystemImageFilename(location.c_str(), isa));
  if (OS::FileExists(system_filename.c_str())) {
    has_system = true;
  }

  bool have_android_data = false;
  bool dalvik_cache_exists = false;
  bool is_global_cache = false;
  std::string dalvik_cache;
  GetDalvikCache(GetInstructionSetString(isa), false, &dalvik_cache,
                 &have_android_data, &dalvik_cache_exists, &is_global_cache);

  std::string cache_filename;
  if (have_android_data && dalvik_cache_exists) {
    // Always set output location even if it does not exist,
    // so that the caller knows where to create the image.
    //
    // image_location = /system/framework/boot.art
    // *image_filename = /data/dalvik-cache/<image_isa>/boot.art
    std::string error_msg;
    if (GetDalvikCacheFilename(location.c_str(), dalvik_cache.c_str(),
                               &cache_filename, &error_msg)) {
      has_cache = true;
    }
  }
  if (has_system) {
    *filename = system_filename;
    return true;
  } else if (has_cache) {
    *filename = cache_filename;
    return true;
  } else {
    return false;
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