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3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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23 
24 /*
25  * @test
26  * @bug 8136421
27  * @requires vm.jvmci
28  * @library / /test/lib
29  * @library ../common/patches
30  * @modules java.base/jdk.internal.misc:+open
31  * @modules java.base/jdk.internal.org.objectweb.asm
32  *          java.base/jdk.internal.org.objectweb.asm.tree
33  * @modules jdk.internal.vm.ci/jdk.vm.ci.hotspot:+open
34  *          jdk.internal.vm.ci/jdk.vm.ci.code
35  *          jdk.internal.vm.ci/jdk.vm.ci.meta
36  * @build jdk.internal.vm.ci/jdk.vm.ci.hotspot.CompilerToVMHelper
37  * @run main/othervm -XX:+UnlockExperimentalVMOptions -XX:+EnableJVMCI
38  *                   -XX:-UseJVMCICompiler
39  *                  compiler.jvmci.compilerToVM.GetSymbolTest
40  */
41 
42 package compiler.jvmci.compilerToVM;
43 
44 import compiler.jvmci.common.CTVMUtilities;
45 import compiler.jvmci.common.testcases.SingleImplementer;
46 import jdk.test.lib.Utils;
47 import jdk.vm.ci.hotspot.CompilerToVMHelper;
48 import jdk.vm.ci.hotspot.HotSpotResolvedJavaMethod;
49 import jdk.vm.ci.meta.ConstantPool;
50 
51 import java.lang.reflect.Field;
52 import java.lang.reflect.Member;
53 import java.lang.reflect.Method;
54 import java.util.ArrayList;
55 import java.util.List;
56 import java.util.function.Function;
57 import java.util.stream.Collectors;
58 import java.util.stream.Stream;
59 
60 public class GetSymbolTest {
61     private static final int CONSTANT_POOL_UTF8_TAG = 1; // see jvms, section 4.4
62 
63     private static final Function<Member[], List<String>> NAMES = members ->
64             Stream.of(members)
65                     .map(Member::getName)
66                     .collect(Collectors.toList());
67 
main(String[] args)68     public static void main(String[] args) {
69         new GetSymbolTest().test(SingleImplementer.class);
70     }
71 
test(Class<?> aClass)72     private void test(Class<?> aClass) {
73         Utils.ensureClassIsLoaded(aClass);
74         Method method;
75         try {
76             method = aClass.getDeclaredMethod("nonInterfaceMethod");
77         } catch (NoSuchMethodException e) {
78             throw new Error("TEST BUG: can't find test method", e);
79         }
80         HotSpotResolvedJavaMethod resolvedMethod
81                 = CTVMUtilities.getResolvedMethod(aClass, method);
82         List<String> symbols;
83         try {
84             symbols = getSymbols(resolvedMethod);
85         } catch (ReflectiveOperationException e) {
86             throw new Error("TEST BUG: can't access private members", e);
87         }
88         List<String> classSymbols = new ArrayList<>();
89         classSymbols.addAll(NAMES.apply(aClass.getDeclaredFields()));
90         classSymbols.addAll(NAMES.apply(aClass.getDeclaredMethods()));
91         // Check that all members of test class have symbols from constant pool
92         for (String s : classSymbols) {
93             if (!symbols.contains(s)) {
94                 // failed. print all symbols found by getSymbol
95                 System.out.println("getSymbol data:");
96                 for (String ctvmValue : symbols) {
97                     System.out.println(ctvmValue);
98                 }
99                 throw new AssertionError("Unable to find symbol " + s
100                         + " using CompilerToVM.getSymbol");
101             }
102         }
103     }
104 
getSymbols(HotSpotResolvedJavaMethod metaspaceMethod)105     private List<String> getSymbols(HotSpotResolvedJavaMethod
106             metaspaceMethod) throws ReflectiveOperationException {
107         List<String> symbols = new ArrayList<>();
108         ConstantPool pool = metaspaceMethod.getConstantPool();
109         long length = pool.length();
110         // jvms-4.1: The constant_pool table is indexed from 1 ...
111         for (int i = 1; i < length; i++) {
112             if (getTag(pool, i) == CONSTANT_POOL_UTF8_TAG) {
113                 long entryPointer;
114                 Method getEntryAt = pool.getClass()
115                         .getDeclaredMethod("getEntryAt", int.class);
116                 getEntryAt.setAccessible(true);
117                 entryPointer = (Long) getEntryAt.invoke(pool, i);
118                 String symbol = CompilerToVMHelper.getSymbol(entryPointer);
119                 symbols.add(symbol);
120             }
121         }
122         return symbols;
123     }
124 
getTag(ConstantPool pool, int index)125     private int getTag(ConstantPool pool, int index)
126             throws ReflectiveOperationException {
127         Object jvmConstant;
128         Method getTag = pool.getClass().getDeclaredMethod("getTagAt",
129                 int.class);
130         getTag.setAccessible(true);
131         jvmConstant = getTag.invoke(pool, index);
132         Field tagCode = jvmConstant.getClass().getDeclaredField("tag");
133         tagCode.setAccessible(true);
134         return tagCode.getInt(jvmConstant);
135     }
136 }
137