author | ksrini |
Wed, 23 Jul 2014 09:19:23 -0700 | |
changeset 25699 | 7ca97d2d0405 |
parent 24223 | 90b07e33a49d |
child 25845 | 14935053bb07 |
permissions | -rw-r--r-- |
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/* |
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* Copyright (c) 2014, 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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|
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import com.sun.tools.classfile.*; |
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import java.io.IOException; |
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import java.lang.annotation.Repeatable; |
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import java.lang.annotation.Retention; |
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import java.lang.annotation.RetentionPolicy; |
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import java.util.Collection; |
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import java.util.HashMap; |
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import java.util.List; |
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import java.util.Map; |
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import java.util.stream.Stream; |
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import static java.lang.String.format; |
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import static java.util.stream.Collectors.*; |
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public abstract class LocalVariableTestBase extends TestBase { |
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public static final int DEFAULT_SCOPE = 0; |
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private final ClassFile classFile; |
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private final Class<?> clazz; |
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protected abstract List<VariableTable> getVariableTables(Code_attribute codeAttribute); |
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public LocalVariableTestBase(Class<?> clazz) { |
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this.clazz = clazz; |
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try { |
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this.classFile = ClassFile.read(getClassFile(clazz)); |
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} catch (IOException | ConstantPoolException e) { |
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throw new IllegalArgumentException("Can't read classfile for specified class", e); |
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} |
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} |
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//info in the LocalVariableTable attribute is compared against expected info stored in annotations |
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public void test() throws IOException { |
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List<java.lang.reflect.Method> testMethods = Stream.of(clazz.getDeclaredMethods()) |
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.filter(m -> m.getAnnotationsByType(ExpectedLocals.class).length > 0) |
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.collect(toList()); |
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int failed = 0; |
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for (java.lang.reflect.Method method : testMethods) { |
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try { |
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Map<String, String> expectedLocals2Types = new HashMap<>(); |
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Map<String, Integer> sig2scope = new HashMap<>(); |
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for (ExpectedLocals anno : method.getDeclaredAnnotationsByType(ExpectedLocals.class)) { |
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expectedLocals2Types.put(anno.name(), anno.type()); |
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sig2scope.put(anno.name() + "&" + anno.type(), anno.scope()); |
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} |
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test(method.getName(), expectedLocals2Types, sig2scope); |
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} catch (AssertionFailedException ex) { |
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System.err.printf("Test %s failed.%n", method.getName()); |
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ex.printStackTrace(); |
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failed++; |
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} |
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} |
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if (failed > 0) |
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throw new RuntimeException(format("Failed %d out of %d. See logs.", failed, testMethods.size())); |
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} |
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public void test(String methodName, Map<String, String> expectedLocals2Types, Map<String, Integer> sig2scope) |
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throws IOException { |
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for (Method m : classFile.methods) { |
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String mName = getString(m.name_index); |
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if (methodName.equals(mName)) { |
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System.out.println("Testing local variable table in method " + mName); |
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Code_attribute code_attribute = (Code_attribute) m.attributes.get(Attribute.Code); |
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List<? extends VariableTable> variableTables = getVariableTables(code_attribute); |
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generalLocalVariableTableCheck(variableTables); |
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List<VariableTable.Entry> entries = variableTables.stream() |
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.flatMap(table -> table.entries().stream()) |
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.collect(toList()); |
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generalEntriesCheck(entries, code_attribute); |
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assertIndexesAreUnique(entries, sig2scope); |
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checkNamesAndTypes(entries, expectedLocals2Types); |
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checkDoubleAndLongIndexes(entries, sig2scope, code_attribute.max_locals); |
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} |
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} |
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} |
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private void generalLocalVariableTableCheck(List<? extends VariableTable> variableTables) { |
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for (VariableTable localTable : variableTables) { |
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//only one per variable. |
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assertEquals(localTable.localVariableTableLength(), |
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localTable.entries().size(), "Incorrect local variable table length"); |
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//attribute length is offset(line_number_table_length) + element_size*element_count |
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assertEquals(localTable.attributeLength(), |
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2 + (5 * 2) * localTable.localVariableTableLength(), "Incorrect attribute length"); |
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} |
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} |
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private void generalEntriesCheck(List<VariableTable.Entry> entries, Code_attribute code_attribute) { |
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for (VariableTable.Entry e : entries) { |
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assertTrue(e.index() >= 0 && e.index() < code_attribute.max_locals, |
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"Index " + e.index() + " out of variable array. Size of array is " + code_attribute.max_locals); |
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assertTrue(e.startPC() >= 0, "StartPC is less then 0. StartPC = " + e.startPC()); |
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assertTrue(e.length() >= 0, "Length is less then 0. Length = " + e.length()); |
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assertTrue(e.startPC() + e.length() <= code_attribute.code_length, |
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format("StartPC+Length > code length.%n" + |
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"%s%n" + |
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"code_length = %s" |
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, e, code_attribute.code_length)); |
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} |
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} |
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131 |
|
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private void checkNamesAndTypes(List<VariableTable.Entry> entries, |
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Map<String, String> expectedLocals2Types) { |
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Map<String, List<String>> actualNames2Types = entries.stream() |
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.collect( |
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groupingBy(VariableTable.Entry::name, |
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mapping(VariableTable.Entry::type, toList()))); |
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for (Map.Entry<String, String> name2type : expectedLocals2Types.entrySet()) { |
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String name = name2type.getKey(); |
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String type = name2type.getValue(); |
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141 |
|
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assertTrue(actualNames2Types.containsKey(name), |
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format("There is no record for local variable %s%nEntries: %s", name, entries)); |
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144 |
|
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assertTrue(actualNames2Types.get(name).contains(type), |
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format("Types are different for local variable %s%nExpected type: %s%nActual type: %s", |
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name, type, actualNames2Types.get(name))); |
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148 |
} |
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149 |
} |
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150 |
|
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151 |
|
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private void assertIndexesAreUnique(Collection<VariableTable.Entry> entries, Map<String, Integer> scopes) { |
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//check every scope separately |
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Map<Object, List<VariableTable.Entry>> entriesByScope = groupByScope(entries, scopes); |
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for (Map.Entry<Object, List<VariableTable.Entry>> mapEntry : entriesByScope.entrySet()) { |
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mapEntry.getValue().stream() |
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.collect(groupingBy(VariableTable.Entry::index)) |
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.entrySet() |
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159 |
.forEach(e -> |
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160 |
assertTrue(e.getValue().size() == 1, |
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"Multiple variables point to the same index in common scope. " + e.getValue())); |
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162 |
} |
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163 |
|
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164 |
} |
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165 |
|
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private void checkDoubleAndLongIndexes(Collection<VariableTable.Entry> entries, |
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167 |
Map<String, Integer> scopes, int maxLocals) { |
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//check every scope separately |
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Map<Object, List<VariableTable.Entry>> entriesByScope = groupByScope(entries, scopes); |
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for (List<VariableTable.Entry> entryList : entriesByScope.values()) { |
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171 |
Map<Integer, VariableTable.Entry> index2Entry = entryList.stream() |
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.collect(toMap(VariableTable.Entry::index, e -> e)); |
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|
173 |
|
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174 |
entryList.stream() |
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175 |
.filter(e -> "J".equals(e.type()) || "D".equals(e.type())) |
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176 |
.forEach(e -> { |
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|
177 |
assertTrue(e.index() + 1 < maxLocals, |
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|
178 |
format("Index %s is out of variable array. Long and double occupy 2 cells." + |
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|
179 |
" Size of array is %d", e.index() + 1, maxLocals)); |
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|
180 |
assertTrue(!index2Entry.containsKey(e.index() + 1), |
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|
181 |
format("An entry points to the second cell of long/double entry.%n%s%n%s", e, |
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|
182 |
index2Entry.get(e.index() + 1))); |
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|
183 |
}); |
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|
184 |
} |
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|
185 |
} |
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|
186 |
|
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187 |
private Map<Object, List<VariableTable.Entry>> groupByScope( |
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Collection<VariableTable.Entry> entries, Map<String, Integer> scopes) { |
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189 |
return entries.stream().collect(groupingBy(e -> scopes.getOrDefault(e.name() + "&" + e.type(), DEFAULT_SCOPE))); |
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190 |
} |
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|
191 |
|
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192 |
protected String getString(int i) { |
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|
193 |
try { |
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194 |
return classFile.constant_pool.getUTF8Info(i).value; |
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195 |
} catch (ConstantPool.InvalidIndex | ConstantPool.UnexpectedEntry ex) { |
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196 |
ex.printStackTrace(); |
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197 |
throw new AssertionFailedException("Issue while reading constant pool"); |
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198 |
} |
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199 |
} |
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|
200 |
|
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201 |
|
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202 |
interface VariableTable { |
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|
203 |
|
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204 |
int localVariableTableLength(); |
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|
205 |
|
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206 |
List<VariableTable.Entry> entries(); |
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|
207 |
|
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208 |
int attributeLength(); |
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|
209 |
|
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|
210 |
interface Entry { |
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|
211 |
|
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|
212 |
int index(); |
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|
213 |
|
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|
214 |
int startPC(); |
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|
215 |
|
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216 |
int length(); |
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|
217 |
|
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|
218 |
String name(); |
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219 |
|
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220 |
String type(); |
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221 |
|
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|
222 |
default String dump() { |
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|
223 |
return format("Entry{" + |
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|
224 |
"%n name = %s" + |
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|
225 |
"%n type = %s" + |
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|
226 |
"%n index = %d" + |
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227 |
"%n startPC = %d" + |
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228 |
"%n length = %d" + |
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229 |
"%n}", name(), type(), index(), startPC(), length()); |
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230 |
} |
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231 |
} |
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232 |
} |
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233 |
|
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234 |
@Retention(RetentionPolicy.RUNTIME) |
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235 |
@Repeatable(Container.class) |
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236 |
@interface ExpectedLocals { |
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237 |
String name(); |
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238 |
|
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239 |
String type(); |
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240 |
|
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241 |
//variables from different scopes can share local variable table index and/or name. |
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int scope() default DEFAULT_SCOPE; |
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} |
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@Retention(RetentionPolicy.RUNTIME) |
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@interface Container { |
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ExpectedLocals[] value(); |
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} |
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} |