Mercurial > hg > graal-jvmci-8
changeset 23849:09687c445ce1
8141551: C2 can not handle returns with inccompatible interface arrays
Reviewed-by: kvn
| author | shshahma |
|---|---|
| date | Thu, 21 Apr 2016 21:53:15 +0530 |
| parents | 3e1cd663c2d3 |
| children | 2988e5adeb8c |
| files | src/share/vm/opto/cfgnode.cpp src/share/vm/opto/parse1.cpp src/share/vm/opto/type.cpp src/share/vm/opto/type.hpp test/compiler/types/TestMeetIncompatibleInterfaceArrays.java |
| diffstat | 5 files changed, 436 insertions(+), 19 deletions(-) [+] |
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--- a/src/share/vm/opto/cfgnode.cpp Fri Apr 15 12:02:37 2016 +0530 +++ b/src/share/vm/opto/cfgnode.cpp Thu Apr 21 21:53:15 2016 +0530 @@ -973,7 +973,7 @@ #ifdef ASSERT // The following logic has been moved into TypeOopPtr::filter. const Type* jt = t->join_speculative(_type); - if( jt->empty() ) { // Emptied out??? + if (jt->empty()) { // Emptied out??? // Check for evil case of 't' being a class and '_type' expecting an // interface. This can happen because the bytecodes do not contain @@ -984,14 +984,21 @@ // be 'I' or 'j/l/O'. Thus we'll pick 'j/l/O'. If this then flows // into a Phi which "knows" it's an Interface type we'll have to // uplift the type. - if( !t->empty() && ttip && ttip->is_loaded() && ttip->klass()->is_interface() ) - { assert(ft == _type, ""); } // Uplift to interface - else if( !t->empty() && ttkp && ttkp->is_loaded() && ttkp->klass()->is_interface() ) - { assert(ft == _type, ""); } // Uplift to interface - // Otherwise it's something stupid like non-overlapping int ranges - // found on dying counted loops. - else - { assert(ft == Type::TOP, ""); } // Canonical empty value + if (!t->empty() && ttip && ttip->is_loaded() && ttip->klass()->is_interface()) { + assert(ft == _type, ""); // Uplift to interface + } else if (!t->empty() && ttkp && ttkp->is_loaded() && ttkp->klass()->is_interface()) { + assert(ft == _type, ""); // Uplift to interface + } else { + // We also have to handle 'evil cases' of interface- vs. class-arrays + Type::get_arrays_base_elements(jt, _type, NULL, &ttip); + if (!t->empty() && ttip != NULL && ttip->is_loaded() && ttip->klass()->is_interface()) { + assert(ft == _type, ""); // Uplift to array of interface + } else { + // Otherwise it's something stupid like non-overlapping int ranges + // found on dying counted loops. + assert(ft == Type::TOP, ""); // Canonical empty value + } + } } else {
--- a/src/share/vm/opto/parse1.cpp Fri Apr 15 12:02:37 2016 +0530 +++ b/src/share/vm/opto/parse1.cpp Thu Apr 21 21:53:15 2016 +0530 @@ -962,13 +962,18 @@ // In case of concurrent class loading, the type we set for the // ret_phi in build_exits() may have been too optimistic and the // ret_phi may be top now. -#ifdef ASSERT + // Otherwise, we've encountered an error and have to mark the method as + // not compilable. Just using an assertion instead would be dangerous + // as this could lead to an infinite compile loop in non-debug builds. { MutexLockerEx ml(Compile_lock, Mutex::_no_safepoint_check_flag); - assert(ret_type->isa_ptr() && C->env()->system_dictionary_modification_counter_changed(), "return value must be well defined"); + if (C->env()->system_dictionary_modification_counter_changed()) { + C->record_failure(C2Compiler::retry_class_loading_during_parsing()); + } else { + C->record_method_not_compilable("Can't determine return type."); + } } -#endif - C->record_failure(C2Compiler::retry_class_loading_during_parsing()); + return; } _exits.push_node(ret_type->basic_type(), ret_phi); } @@ -2093,15 +2098,24 @@ // here. Node* phi = _exits.argument(0); const TypeInstPtr *tr = phi->bottom_type()->isa_instptr(); - if( tr && tr->klass()->is_loaded() && - tr->klass()->is_interface() ) { + if (tr && tr->klass()->is_loaded() && + tr->klass()->is_interface()) { const TypeInstPtr *tp = value->bottom_type()->isa_instptr(); if (tp && tp->klass()->is_loaded() && !tp->klass()->is_interface()) { // sharpen the type eagerly; this eases certain assert checking if (tp->higher_equal(TypeInstPtr::NOTNULL)) tr = tr->join_speculative(TypeInstPtr::NOTNULL)->is_instptr(); - value = _gvn.transform(new (C) CheckCastPPNode(0,value,tr)); + value = _gvn.transform(new (C) CheckCastPPNode(0, value, tr)); + } + } else { + // Also handle returns of oop-arrays to an arrays-of-interface return + const TypeInstPtr* phi_tip; + const TypeInstPtr* val_tip; + Type::get_arrays_base_elements(phi->bottom_type(), value->bottom_type(), &phi_tip, &val_tip); + if (phi_tip != NULL && phi_tip->is_loaded() && phi_tip->klass()->is_interface() && + val_tip != NULL && val_tip->is_loaded() && !val_tip->klass()->is_interface()) { + value = _gvn.transform(new (C) CheckCastPPNode(0, value, phi->bottom_type())); } } phi->add_req(value);
--- a/src/share/vm/opto/type.cpp Fri Apr 15 12:02:37 2016 +0530 +++ b/src/share/vm/opto/type.cpp Thu Apr 21 21:53:15 2016 +0530 @@ -149,6 +149,33 @@ return bt; } +// For two instance arrays of same dimension, return the base element types. +// Otherwise or if the arrays have different dimensions, return NULL. +void Type::get_arrays_base_elements(const Type *a1, const Type *a2, + const TypeInstPtr **e1, const TypeInstPtr **e2) { + + if (e1) *e1 = NULL; + if (e2) *e2 = NULL; + const TypeAryPtr* a1tap = (a1 == NULL) ? NULL : a1->isa_aryptr(); + const TypeAryPtr* a2tap = (a2 == NULL) ? NULL : a2->isa_aryptr(); + + if (a1tap != NULL && a2tap != NULL) { + // Handle multidimensional arrays + const TypePtr* a1tp = a1tap->elem()->make_ptr(); + const TypePtr* a2tp = a2tap->elem()->make_ptr(); + while (a1tp && a1tp->isa_aryptr() && a2tp && a2tp->isa_aryptr()) { + a1tap = a1tp->is_aryptr(); + a2tap = a2tp->is_aryptr(); + a1tp = a1tap->elem()->make_ptr(); + a2tp = a2tap->elem()->make_ptr(); + } + if (a1tp && a1tp->isa_instptr() && a2tp && a2tp->isa_instptr()) { + if (e1) *e1 = a1tp->is_instptr(); + if (e2) *e2 = a2tp->is_instptr(); + } + } +} + //---------------------------get_typeflow_type--------------------------------- // Import a type produced by ciTypeFlow. const Type* Type::get_typeflow_type(ciType* type) { @@ -1982,7 +2009,11 @@ bool TypeAry::interface_vs_oop(const Type *t) const { const TypeAry* t_ary = t->is_ary(); if (t_ary) { - return _elem->interface_vs_oop(t_ary->_elem); + const TypePtr* this_ptr = _elem->make_ptr(); // In case we have narrow_oops + const TypePtr* t_ptr = t_ary->_elem->make_ptr(); + if(this_ptr != NULL && t_ptr != NULL) { + return this_ptr->interface_vs_oop(t_ptr); + } } return false; } @@ -2834,8 +2865,17 @@ // be 'I' or 'j/l/O'. Thus we'll pick 'j/l/O'. If this then flows // into a Phi which "knows" it's an Interface type we'll have to // uplift the type. - if (!empty() && ktip != NULL && ktip->is_loaded() && ktip->klass()->is_interface()) - return kills; // Uplift to interface + if (!empty()) { + if (ktip != NULL && ktip->is_loaded() && ktip->klass()->is_interface()) { + return kills; // Uplift to interface + } + // Also check for evil cases of 'this' being a class array + // and 'kills' expecting an array of interfaces. + Type::get_arrays_base_elements(ft, kills, NULL, &ktip); + if (ktip != NULL && ktip->is_loaded() && ktip->klass()->is_interface()) { + return kills; // Uplift to array of interface + } + } return Type::TOP; // Canonical empty value }
--- a/src/share/vm/opto/type.hpp Fri Apr 15 12:02:37 2016 +0530 +++ b/src/share/vm/opto/type.hpp Thu Apr 21 21:53:15 2016 +0530 @@ -367,6 +367,11 @@ return _const_basic_type[type]; } + // For two instance arrays of same dimension, return the base element types. + // Otherwise or if the arrays have different dimensions, return NULL. + static void get_arrays_base_elements(const Type *a1, const Type *a2, + const TypeInstPtr **e1, const TypeInstPtr **e2); + // Mapping to the array element's basic type. BasicType array_element_basic_type() const;
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/test/compiler/types/TestMeetIncompatibleInterfaceArrays.java Thu Apr 21 21:53:15 2016 +0530 @@ -0,0 +1,351 @@ +/* + * Copyright 2015 SAP AG. 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. + * + * 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 + * or visit www.oracle.com if you need additional information or have any + * questions. + */ + +/* + * @test + * @bug 8141551 + * @summary C2 can not handle returns with inccompatible interface arrays + * @library /testlibrary /testlibrary/whitebox/ + * @build sun.hotspot.WhiteBox + * @run main ClassFileInstaller sun.hotspot.WhiteBox + * sun.hotspot.WhiteBox$WhiteBoxPermission + * @run main/othervm + * -Xbootclasspath/a:. + * -XX:+UnlockDiagnosticVMOptions + * -XX:+WhiteBoxAPI + * -Xbatch + * -XX:CompileThreshold=1 + * -XX:-TieredCompilation + * -XX:CICompilerCount=1 + * -XX:+PrintCompilation + * -XX:+PrintInlining + * -XX:CompileCommand=compileonly,MeetIncompatibleInterfaceArrays*.run + * -XX:CompileCommand=dontinline,TestMeetIncompatibleInterfaceArrays$Helper.createI2* + * -XX:CompileCommand=quiet + * TestMeetIncompatibleInterfaceArrays 0 + * @run main/othervm + * -Xbootclasspath/a:. + * -XX:+UnlockDiagnosticVMOptions + * -XX:+WhiteBoxAPI + * -Xbatch + * -XX:CompileThreshold=1 + * -XX:-TieredCompilation + * -XX:CICompilerCount=1 + * -XX:+PrintCompilation + * -XX:+PrintInlining + * -XX:CompileCommand=compileonly,MeetIncompatibleInterfaceArrays*.run + * -XX:CompileCommand=inline,TestMeetIncompatibleInterfaceArrays$Helper.createI2* + * -XX:CompileCommand=quiet + * TestMeetIncompatibleInterfaceArrays 1 + * @run main/othervm + * -Xbootclasspath/a:. + * -XX:+UnlockDiagnosticVMOptions + * -XX:+WhiteBoxAPI + * -Xbatch + * -XX:CompileThreshold=1 + * -XX:Tier0InvokeNotifyFreqLog=0 -XX:Tier2InvokeNotifyFreqLog=0 -XX:Tier3InvokeNotifyFreqLog=0 -XX:Tier23InlineeNotifyFreqLog=0 + * -XX:Tier3InvocationThreshold=2 -XX:Tier3MinInvocationThreshold=2 -XX:Tier3CompileThreshold=2 + * -XX:Tier4InvocationThreshold=1 -XX:Tier4MinInvocationThreshold=1 -XX:Tier4CompileThreshold=1 + * -XX:+TieredCompilation + * -XX:CICompilerCount=2 + * -XX:+PrintCompilation + * -XX:+PrintInlining + * -XX:CompileCommand=compileonly,MeetIncompatibleInterfaceArrays*.run + * -XX:CompileCommand=compileonly,TestMeetIncompatibleInterfaceArrays$Helper.createI2* + * -XX:CompileCommand=inline,TestMeetIncompatibleInterfaceArrays$Helper.createI2* + * -XX:CompileCommand=quiet + * TestMeetIncompatibleInterfaceArrays 2 + * + * @author volker.simonis@gmail.com + */ + +import java.io.FileOutputStream; +import java.lang.reflect.InvocationTargetException; +import java.lang.reflect.Method; +import jdk.internal.org.objectweb.asm.ClassWriter; +import jdk.internal.org.objectweb.asm.MethodVisitor; +import static jdk.internal.org.objectweb.asm.Opcodes.*; +import sun.hotspot.WhiteBox; + +public class TestMeetIncompatibleInterfaceArrays extends ClassLoader { + + private static final WhiteBox WB = WhiteBox.getWhiteBox(); + + public static interface I1 { public String getName(); } + public static interface I2 { public String getName(); } + public static class I2C implements I2 { public String getName() { return "I2";} } + public static class I21C implements I2, I1 { public String getName() { return "I2 and I1";} } + + public static class Helper { + public static I2 createI2Array0() { + return new I2C(); + } + public static I2[] createI2Array1() { + return new I2C[] { new I2C() }; + } + public static I2[][] createI2Array2() { + return new I2C[][] { new I2C[] { new I2C() } }; + } + public static I2[][][] createI2Array3() { + return new I2C[][][] { new I2C[][] { new I2C[] { new I2C() } } }; + } + public static I2[][][][] createI2Array4() { + return new I2C[][][][] { new I2C[][][] { new I2C[][] { new I2C[] { new I2C() } } } }; + } + public static I2[][][][][] createI2Array5() { + return new I2C[][][][][] { new I2C[][][][] { new I2C[][][] { new I2C[][] { new I2C[] { new I2C() } } } } }; + } + public static I2 createI21Array0() { + return new I21C(); + } + public static I2[] createI21Array1() { + return new I21C[] { new I21C() }; + } + public static I2[][] createI21Array2() { + return new I21C[][] { new I21C[] { new I21C() } }; + } + public static I2[][][] createI21Array3() { + return new I21C[][][] { new I21C[][] { new I21C[] { new I21C() } } }; + } + public static I2[][][][] createI21Array4() { + return new I21C[][][][] { new I21C[][][] { new I21C[][] { new I21C[] { new I21C() } } } }; + } + public static I2[][][][][] createI21Array5() { + return new I21C[][][][][] { new I21C[][][][] { new I21C[][][] { new I21C[][] { new I21C[] { new I21C() } } } } }; + } + } + + // Location for the generated class files + public static final String PATH = System.getProperty("test.classes", ".") + java.io.File.separator; + + /* + * With 'good == false' this helper method creates the following classes + * (using the nested 'Helper' class and the nested interfaces 'I1' and 'I2'). + * For brevity I omit the enclosing class 'TestMeetIncompatibleInterfaceArrays' in the + * following examples: + * + * public class MeetIncompatibleInterfaceArrays0ASM { + * public static I1 run() { + * return Helper.createI2Array0(); // returns I2 + * } + * public static void test() { + * I1 i1 = run(); + * System.out.println(i1.getName()); + * } + * } + * public class MeetIncompatibleInterfaceArrays1ASM { + * public static I1[] run() { + * return Helper.createI2Array1(); // returns I2[] + * } + * public static void test() { + * I1[] i1 = run(); + * System.out.println(i1[0].getName()); + * } + * } + * ... + * // MeetIncompatibleInterfaceArrays4ASM is special because it creates + * // an illegal class which will be rejected by the verifier. + * public class MeetIncompatibleInterfaceArrays4ASM { + * public static I1[][][][] run() { + * return Helper.createI2Array3(); // returns I1[][][] which gives a verifier error because return expects I1[][][][] + * } + * public static void test() { + * I1[][][][][] i1 = run(); + * System.out.println(i1[0][0][0][0][0].getName()); + * } + * ... + * public class MeetIncompatibleInterfaceArrays5ASM { + * public static I1[][][][][] run() { + * return Helper.createI2Array5(); // returns I2[][][][][] + * } + * public static void test() { + * I1[][][][][] i1 = run(); + * System.out.println(i1[0][0][0][0][0].getName()); + * } + * } + * + * Notice that this is not legal Java code. We would have to use a cast in "run()" to make it legal: + * + * public static I1[] run() { + * return (I1[])Helper.createI2Array1(); // returns I2[] + * } + * + * But in pure bytecode, the "run()" methods are perfectly legal: + * + * public static I1[] run(); + * Code: + * 0: invokestatic #16 // Method Helper.createI2Array1:()[LI2; + * 3: areturn + * + * The "test()" method calls the "getName()" function from I1 on the objects returned by "run()". + * This will epectedly fail with an "IncompatibleClassChangeError" because the objects returned + * by "run()" (and by createI2Array()) are actually of type "I2C" and only implement "I2" but not "I1". + * + * + * With 'good == true' this helper method will create the following classes: + * + * public class MeetIncompatibleInterfaceArraysGood0ASM { + * public static I1 run() { + * return Helper.createI21Array0(); // returns I2 + * } + * public static void test() { + * I1 i1 = run(); + * System.out.println(i1.getName()); + * } + * } + * + * Calling "test()" on these objects will succeed and output "I2 and I1" because now the "run()" + * method calls "createI21Array()" which actually return an object (or an array of objects) of + * type "I21C" which implements both "I2" and "I1". + * + * Notice that at the bytecode level, the code for the "run()" and "test()" methods in + * "MeetIncompatibleInterfaceArraysASM" and "MeetIncompatibleInterfaceArraysGoodASM" look exactly + * the same. I.e. the verifier has no chance to verify if the I2 object returned by "createI1Array()" + * or "createI21Array()" implements "I1" or not. That's actually the reason why both versions of + * generated classes are legal from a verifier point of view. + * + */ + static void generateTestClass(int dim, boolean good) throws Exception { + String baseClassName = "MeetIncompatibleInterfaceArrays"; + if (good) + baseClassName += "Good"; + String createName = "createI2" + (good ? "1" : "") + "Array"; + String a = ""; + for (int i = 0; i < dim; i++) + a += "["; + ClassWriter cw = new ClassWriter(ClassWriter.COMPUTE_FRAMES); + cw.visit(V1_8, ACC_PUBLIC, baseClassName + dim + "ASM", null, "java/lang/Object", null); + MethodVisitor constr = cw.visitMethod(ACC_PUBLIC, "<init>", "()V", null, null); + constr.visitCode(); + constr.visitVarInsn(ALOAD, 0); + constr.visitMethodInsn(INVOKESPECIAL, "java/lang/Object", "<init>", "()V", false); + constr.visitInsn(RETURN); + constr.visitMaxs(0, 0); + constr.visitEnd(); + MethodVisitor run = cw.visitMethod(ACC_PUBLIC | ACC_STATIC, "run", + "()" + a + "LTestMeetIncompatibleInterfaceArrays$I1;", null, null); + run.visitCode(); + if (dim == 4) { + run.visitMethodInsn(INVOKESTATIC, "TestMeetIncompatibleInterfaceArrays$Helper", createName + 3, + "()" + "[[[" + "LTestMeetIncompatibleInterfaceArrays$I2;", false); + } else { + run.visitMethodInsn(INVOKESTATIC, "TestMeetIncompatibleInterfaceArrays$Helper", createName + dim, + "()" + a + "LTestMeetIncompatibleInterfaceArrays$I2;", false); + } + run.visitInsn(ARETURN); + run.visitMaxs(0, 0); + run.visitEnd(); + MethodVisitor test = cw.visitMethod(ACC_PUBLIC | ACC_STATIC, "test", "()V", null, null); + test.visitCode(); + test.visitMethodInsn(INVOKESTATIC, baseClassName + dim + "ASM", "run", + "()" + a + "LTestMeetIncompatibleInterfaceArrays$I1;", false); + test.visitVarInsn(ASTORE, 0); + if (dim > 0) { + test.visitVarInsn(ALOAD, 0); + for (int i = 1; i <= dim; i++) { + test.visitInsn(ICONST_0); + test.visitInsn(AALOAD); + } + test.visitVarInsn(ASTORE, 1); + } + test.visitFieldInsn(GETSTATIC, "java/lang/System", "out", "Ljava/io/PrintStream;"); + test.visitVarInsn(ALOAD, dim > 0 ? 1 : 0); + test.visitMethodInsn(INVOKEINTERFACE, "TestMeetIncompatibleInterfaceArrays$I1", "getName", + "()Ljava/lang/String;", true); + test.visitMethodInsn(INVOKEVIRTUAL, "java/io/PrintStream", "println", "(Ljava/lang/Object;)V", false); + test.visitInsn(RETURN); + test.visitMaxs(0, 0); + test.visitEnd(); + + // Get the bytes of the class.. + byte[] b = cw.toByteArray(); + // ..and write them into a class file (for debugging) + FileOutputStream fos = new FileOutputStream(PATH + baseClassName + dim + "ASM.class"); + fos.write(b); + fos.close(); + + } + + public static String[][] tier = { { "interpreted", "C2 (tier 4) without inlining", "C2 (tier4) without inlining" }, + { "interpreted", "C2 (tier 4) with inlining", "C2 (tier4) with inlining" }, + { "interpreted", "C1 (tier 3) with inlining", "C2 (tier4) with inlining" } }; + + public static void main(String[] args) throws Exception { + final int pass = Integer.parseInt(args.length > 0 ? args[0] : "0"); + + // Load and initialize some classes required for compilation + Class.forName("TestMeetIncompatibleInterfaceArrays$I1"); + Class.forName("TestMeetIncompatibleInterfaceArrays$I2"); + Class.forName("TestMeetIncompatibleInterfaceArrays$Helper"); + + for (int g = 0; g < 2; g++) { + String baseClassName = "MeetIncompatibleInterfaceArrays"; + boolean good = (g == 0) ? false : true; + if (good) + baseClassName += "Good"; + for (int i = 0; i < 6; i++) { + System.out.println(); + System.out.println("Creating " + baseClassName + i + "ASM.class"); + System.out.println("========================================" + "=" + "========="); + // Create the "MeetIncompatibleInterfaceArrays<i>ASM" class + generateTestClass(i, good); + Class<?> c = null; + try { + c = Class.forName(baseClassName + i + "ASM"); + } catch (VerifyError ve) { + if (i == 4) { + System.out.println("OK - must be (" + ve.getMessage() + ")."); + } else { + throw ve; + } + continue; + } + // Call MeetIncompatibleInterfaceArrays<i>ASM.test() + Method m = c.getMethod("test"); + Method r = c.getMethod("run"); + for (int j = 0; j < 3; j++) { + System.out.println((j + 1) + ". invokation of " + baseClassName + i + "ASM.test() [should be " + + tier[pass][j] + "]"); + try { + m.invoke(null); + } catch (InvocationTargetException ite) { + if (good) { + throw ite; + } else { + if (ite.getCause() instanceof IncompatibleClassChangeError) { + System.out.println(" OK - catched InvocationTargetException(" + + ite.getCause().getMessage() + ")."); + } else { + throw ite; + } + } + } + } + System.out.println("Method " + r + (WB.isMethodCompiled(r) ? " has" : " has not") + " been compiled."); + if (!WB.isMethodCompiled(r)) { + throw new Exception("Method " + r + " must be compiled!"); + } + } + } + } +}