Function JavaAddJammAgent

be/src/common/init.cc:350–376

Append the javaagent arg to JAVA_TOOL_OPTIONS to load jamm.

// Append the javaagent arg to JAVA_TOOL_OPTIONS to load jamm.
static Status JavaAddJammAgent() {
  stringstream val_out;
  char* current_val_c = getenv("JAVA_TOOL_OPTIONS");
  if (current_val_c != NULL) {
    val_out << current_val_c << " ";
  }

  istringstream classpath {getenv("CLASSPATH")};
  string jamm_path, test_path;
  while (getline(classpath, test_path, ':')) {
    Status status = FileSystemUtil::FindFileInPath(test_path, "jamm-.*.jar", &jamm_path);
    // Error during FindFileInPath is not fatal if jamm path is found in another path.
    if (!status.ok()) {
      LOG(ERROR) << "Error when processing class path: " << status.msg().msg();
    }
    if (!jamm_path.empty()) break;
  }
  if (jamm_path.empty()) {
    return Status("Could not find jamm-*.jar in Java CLASSPATH");
  }
  val_out << "-javaagent:" << jamm_path;

  if (setenv("JAVA_TOOL_OPTIONS", val_out.str().c_str(), 1) < 0) {
    return Status(Substitute("Could not update JAVA_TOOL_OPTIONS: $0", GetStrErrMsg()));
  }
  return Status::OK();
}

// Append add-opens args to JAVA_TOOL_OPTIONS for ehcache and jamm.
static Status JavaAddOpens(bool useSizeOf) {