/*
 * Copyright (c) 2013, Oracle and/or its affiliates. All rights reserved.
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package org.openjdk.btrace.instr;

import java.io.IOException;
import org.junit.jupiter.api.AfterAll;
import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.BeforeAll;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.objectweb.asm.ClassReader;
import org.objectweb.asm.ClassVisitor;
import org.objectweb.asm.MethodVisitor;
import org.objectweb.asm.Opcodes;

/** @author Jaroslav Bachorik */
public class StackTrackingMethodVisitorTest extends InstrumentorTestBase {
  private ClassReader reader;

  @BeforeAll
  public static void setUpClass() {}

  @AfterAll
  public static void tearDownClass() {}

  @BeforeEach
  public void setUp() throws IOException {
    byte[] data = loadTargetClass("StackTrackerTest");
    System.err.println(asmify(data));
    reader = new ClassReader(data);
  }

  @AfterEach
  @Override
  public void tearDown() {}

  @Test
  public void sanityTrackerTest() throws Exception {
    // just make sure that a sufficiently complex methods won't cause
    // any problems for tracking the stack
    reader.accept(
        new ClassVisitor(Opcodes.ASM9) {
          private String clzName;

          @Override
          public void visit(
              int i, int i1, String className, String string1, String string2, String[] strings) {
            this.clzName = className;
            super.visit(i, i1, className, string1, string2, strings);
          }

          @Override
          public MethodVisitor visitMethod(
              int access, String name, String desc, String sig, String[] exceptions) {
            MethodVisitor mv = super.visitMethod(access, name, desc, sig, exceptions);
            return new StackTrackingMethodVisitor(
                mv, clzName, desc, ((access & Opcodes.ACC_STATIC) == Opcodes.ACC_STATIC));
          }
        },
        ClassReader.EXPAND_FRAMES);
  }
}
