1 /* 2 * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 4 * 5 * This code is free software; you can redistribute it and/or modify it 6 * under the terms of the GNU General Public License version 2 only, as 7 * published by the Free Software Foundation. 8 * 9 * This code is distributed in the hope that it will be useful, but WITHOUT 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 12 * version 2 for more details (a copy is included in the LICENSE file that 13 * accompanied this code). 14 * 15 * You should have received a copy of the GNU General Public License version 16 * 2 along with this work; if not, write to the Free Software Foundation, 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 18 * 19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 20 * or visit www.oracle.com if you need additional information or have any 21 * questions. 22 */ 23 24 25 package org.graalvm.compiler.phases.verify; 26 27 import org.graalvm.compiler.core.common.PermanentBailoutException; 28 import org.graalvm.compiler.core.common.RetryableBailoutException; 29 import org.graalvm.compiler.debug.GraalError; 30 import org.graalvm.compiler.nodes.StructuredGraph; 31 import org.graalvm.compiler.nodes.java.MethodCallTargetNode; 32 import org.graalvm.compiler.phases.VerifyPhase; 33 import org.graalvm.compiler.phases.tiers.PhaseContext; 34 35 import jdk.vm.ci.code.BailoutException; 36 import jdk.vm.ci.meta.ResolvedJavaMethod; 37 import jdk.vm.ci.meta.ResolvedJavaType; 38 39 public class VerifyBailoutUsage extends VerifyPhase<PhaseContext> { 40 41 private static final String[] AllowedPackagePrefixes; 42 43 private static String getPackageName(Class<?> c) { 44 String classNameWithPackage = c.getName(); 45 String simpleName = c.getSimpleName(); 46 return classNameWithPackage.substring(0, classNameWithPackage.length() - simpleName.length() - 1); 47 } 48 49 static { 50 try { 51 AllowedPackagePrefixes = new String[]{getPackageName(PermanentBailoutException.class), "jdk.vm.ci"}; 52 } catch (Throwable t) { 53 throw new GraalError(t); 54 } 55 } 56 57 private static boolean matchesPrefix(String packageName) { 58 for (String allowedPackagePrefix : AllowedPackagePrefixes) { 59 if (packageName.startsWith(allowedPackagePrefix)) { 60 return true; 61 } 62 } 63 return false; 64 } 65 66 @Override 67 protected boolean verify(StructuredGraph graph, PhaseContext context) { 68 final ResolvedJavaType bailoutType = context.getMetaAccess().lookupJavaType(BailoutException.class); 69 ResolvedJavaMethod caller = graph.method(); 70 String holderQualified = caller.format("%H"); 71 String holderUnqualified = caller.format("%h"); 72 String packageName = holderQualified.substring(0, holderQualified.length() - holderUnqualified.length() - 1); 73 if (!matchesPrefix(packageName)) { 74 for (MethodCallTargetNode t : graph.getNodes(MethodCallTargetNode.TYPE)) { 75 ResolvedJavaMethod callee = t.targetMethod(); 76 if (callee.getDeclaringClass().equals(bailoutType)) { 77 // we only allow the getter 78 if (!callee.getName().equals("isPermanent")) { 79 throw new VerificationError("Call to %s at callsite %s is prohibited. Consider using %s for permanent bailouts or %s for retryables.", callee.format("%H.%n(%p)"), 80 caller.format("%H.%n(%p)"), PermanentBailoutException.class.getName(), 81 RetryableBailoutException.class.getName()); 82 } 83 } 84 } 85 } 86 return true; 87 } 88 89 }