jdk

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/*
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 * Copyright (c) 2020, Oracle and/or its affiliates. All rights reserved.
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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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 *
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 * This code is free software; you can redistribute it and/or modify it
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 * under the terms of the GNU General Public License version 2 only, as
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 * published by the Free Software Foundation.
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 *
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 * This code is distributed in the hope that it will be useful, but WITHOUT
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 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
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 * version 2 for more details (a copy is included in the LICENSE file that
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 * accompanied this code).
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 *
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 * You should have received a copy of the GNU General Public License version
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 * 2 along with this work; if not, write to the Free Software Foundation,
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 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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 *
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 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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 * or visit www.oracle.com if you need additional information or have any
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 * questions.
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 */
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#include "precompiled.hpp"
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#include "classfile/symbolTable.hpp"
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#include "memory/resourceArea.hpp"
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#include "runtime/interfaceSupport.inline.hpp"
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#include "runtime/signature.hpp"
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#include "threadHelper.inline.hpp"
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#include "unittest.hpp"
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TEST_VM(SignatureStream, check_refcount) {
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  JavaThread* THREAD = JavaThread::current();
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  // the thread should be in vm to use locks
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  ThreadInVMfromNative ThreadInVMfromNative(THREAD);
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  // SignatureStream::as_symbol will allocate on the resource area
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  ResourceMark rm(THREAD);
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  Symbol* foo = SymbolTable::new_symbol("Foo");
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  int r1 = foo->refcount();
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  {
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    // Trivial test: non-method signature of a non-permanent symbol
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    Symbol* methodSig = SymbolTable::new_symbol("LFoo;");
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    SignatureStream ss(methodSig, false);
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    Symbol* sym = ss.as_symbol();
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    ASSERT_EQ(sym, foo) << "found symbol should be Foo: " << sym->as_C_string();
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    // This should mean the SS looks up and increments refcount to Foo
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    ASSERT_EQ(foo->refcount(), r1 + 1) << "refcount should be incremented";
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    ASSERT_TRUE(!ss.is_done())
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      << "stream parsing should not be marked as done until"
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      <<" ss.next() called after the last symbol";
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    ss.next();
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    ASSERT_TRUE(ss.is_done()) << "stream parsing should be marked as done";
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  }
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  ASSERT_EQ(foo->refcount(), r1) << "refcount should have decremented";
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  {
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    // Ensure refcount is properly decremented when first symbol is non-permanent and second isn't
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    Symbol* integer = SymbolTable::new_symbol("java/lang/Integer");
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    ASSERT_TRUE(integer->is_permanent()) << "java/lang/Integer must be permanent";
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    Symbol* methodSig = SymbolTable::new_symbol("(LFoo;)Ljava/lang/Integer;");
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    SignatureStream ss(methodSig);
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    Symbol* sym = ss.as_symbol();
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    ASSERT_EQ(sym, foo) << "found symbol should be Foo: " << sym->as_C_string();
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    // This should mean the SS looks up and increments refcount to Foo
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    ASSERT_EQ(foo->refcount(), r1 + 1) << "refcount should be incremented";
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    ss.next();
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    sym = ss.as_symbol();
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    ASSERT_EQ(sym, integer) << "found symbol should be java/lang/Integer";
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    ASSERT_TRUE(!ss.is_done())
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      << "stream parsing should not be marked as done until"
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      <<" ss.next() called after the last symbol";
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    ss.next();
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    ASSERT_TRUE(ss.is_done()) << "stream parsing should be marked as done";
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  }
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  ASSERT_EQ(foo->refcount(), r1) << "refcount should have decremented";
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}
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