// Copyright 2017 The Bazel Authors. All rights reserved. // // 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.google.devtools.build.lib.syntax; import com.google.common.annotations.VisibleForTesting; import com.google.common.base.Preconditions; import java.util.ArrayList; import java.util.List; /** * Holds the Skylark callstack in thread-local storage. Contains all Expressions and BaseFunctions * currently being evaluated. * *
This is needed for memory tracking, since the evaluator is not available in the context of
* instrumentation. It should not be used by normal Skylark interpreter logic.
*/
public class Callstack {
// This field should be read, but not written, directly in order to avoid the overhead of a
// method call.
static boolean enabled;
private static final ThreadLocal> callstack =
ThreadLocal.withInitial(ArrayList::new);
public static void setEnabled(boolean enabled) {
Callstack.enabled = enabled;
}
public static void push(ASTNode node) {
callstack.get().add(node);
}
public static void push(BaseFunction function) {
callstack.get().add(function);
}
public static void pop() {
List