8209833: C2 compilation fails with "assert(ex_map->jvms()->same_calls_as(_exceptions->jvms())) failed: all collected exceptions must come from the same place"

Deoptimize if exception is thrown in _clone intrinsic.

Reviewed-by: kvn

src/hotspot/share/opto/graphKit.cpp

@@ -1772,7 +1772,7 @@ void GraphKit::set_edges_for_java_call(CallJavaNode* call, bool must_throw, bool
   //return xcall;   // no need, caller already has it
 }
 
-Node* GraphKit::set_results_for_java_call(CallJavaNode* call, bool separate_io_proj) {
+Node* GraphKit::set_results_for_java_call(CallJavaNode* call, bool separate_io_proj, bool deoptimize) {
   if (stopped())  return top();  // maybe the call folded up?
 
   // Capture the return value, if any.
@@ -1785,7 +1785,7 @@ Node* GraphKit::set_results_for_java_call(CallJavaNode* call, bool separate_io_p
   // Note:  Since any out-of-line call can produce an exception,
   // we always insert an I_O projection from the call into the result.
 
-  make_slow_call_ex(call, env()->Throwable_klass(), separate_io_proj);
+  make_slow_call_ex(call, env()->Throwable_klass(), separate_io_proj, deoptimize);
 
   if (separate_io_proj) {
     // The caller requested separate projections be used by the fall
@@ -2571,7 +2571,7 @@ void GraphKit::make_slow_call_ex(Node* call, ciInstanceKlass* ex_klass, bool sep
                       Deoptimization::Action_none);
       } else {
         // Create an exception state also.
-        // Use an exact type if the caller has specified a specific exception.
+        // Use an exact type if the caller has a specific exception.
         const Type* ex_type = TypeOopPtr::make_from_klass_unique(ex_klass)->cast_to_ptr_type(TypePtr::NotNull);
         Node*       ex_oop  = new CreateExNode(ex_type, control(), i_o);
         add_exception_state(make_exception_state(_gvn.transform(ex_oop)));

src/hotspot/share/opto/graphKit.hpp

@@ -693,7 +693,7 @@ class GraphKit : public Phase {
   // Finish up a java call that was started by set_edges_for_java_call.
   // Call add_exception on any throw arising from the call.
   // Return the call result (transformed).
-  Node* set_results_for_java_call(CallJavaNode* call, bool separate_io_proj = false);
+  Node* set_results_for_java_call(CallJavaNode* call, bool separate_io_proj = false, bool deoptimize = false);
 
   // Similar to set_edges_for_java_call, but simplified for runtime calls.
   void  set_predefined_output_for_runtime_call(Node* call) {

src/hotspot/share/opto/library_call.cpp

@@ -4386,7 +4386,8 @@ bool LibraryCallKit::inline_native_clone(bool is_virtual) {
     if (!stopped()) {
       PreserveJVMState pjvms(this);
       CallJavaNode* slow_call = generate_method_call(vmIntrinsics::_clone, is_virtual);
-      Node* slow_result = set_results_for_java_call(slow_call);
+      // We need to deoptimize on exception (see comment above)
+      Node* slow_result = set_results_for_java_call(slow_call, false, /* deoptimize */ true);
       // this->control() comes from set_results_for_java_call
       result_reg->init_req(_slow_path, control());
       result_val->init_req(_slow_path, slow_result);

test/hotspot/jtreg/compiler/intrinsics/object/TestClone.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2014, 2016, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2014, 2018, Oracle and/or its affiliates. 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
@@ -29,7 +29,7 @@
  * @library /test/lib
  *
  * @run main/othervm -XX:-TieredCompilation -Xbatch
- *      -XX:CompileCommand=compileonly,compiler.intrinsics.object.TestClone::f
+ *      -XX:CompileCommand=compileonly,compiler.intrinsics.object.TestClone::test*
  *      compiler.intrinsics.object.TestClone
  */
 
@@ -37,6 +37,43 @@ package compiler.intrinsics.object;
 
 import jdk.test.lib.Asserts;
 
+abstract class MyAbstract {
+
+    public Object myClone1() throws CloneNotSupportedException {
+        return this.clone();
+    }
+
+    public Object myClone2() throws CloneNotSupportedException {
+        return this.clone();
+    }
+
+    public Object myClone3() throws CloneNotSupportedException {
+        return this.clone();
+    }
+}
+
+class MyClass1 extends MyAbstract {
+    @Override
+    public Object clone() throws CloneNotSupportedException {
+        return super.clone();
+    }
+}
+
+class MyClass2 extends MyAbstract {
+
+}
+
+class MyClass3 extends MyAbstract implements Cloneable {
+    @Override
+    public Object clone() throws CloneNotSupportedException {
+        return super.clone();
+    }
+}
+
+class MyClass4 extends MyAbstract implements Cloneable {
+
+}
+
 public class TestClone implements Cloneable {
     static class A extends TestClone {}
     static class B extends TestClone {
@@ -56,29 +93,70 @@ public class TestClone implements Cloneable {
     }
     static TestClone a = new A(), b = new B(), c = new C(), d = new D();
 
-    public static Object f(TestClone o) throws CloneNotSupportedException {
+    public static Object test1(TestClone o) throws CloneNotSupportedException {
         // Polymorphic call site: >90% Object::clone / <10% other methods
         return o.clone();
     }
 
+    public static void test2(MyAbstract obj, boolean shouldThrow) throws Exception {
+       try {
+            obj.myClone1();
+        } catch (Exception e) {
+            return; // Expected
+        }
+        Asserts.assertFalse(shouldThrow, "No exception thrown");
+    }
+
+    public static void test3(MyAbstract obj, boolean shouldThrow) throws Exception {
+       try {
+            obj.myClone2();
+        } catch (Exception e) {
+            return; // Expected
+        }
+        Asserts.assertFalse(shouldThrow, "No exception thrown");
+    }
+
+    public static void test4(MyAbstract obj, boolean shouldThrow) throws Exception {
+       try {
+            obj.myClone3();
+        } catch (Exception e) {
+            return; // Expected
+        }
+        Asserts.assertFalse(shouldThrow, "No exception thrown");
+    }
+
     public static void main(String[] args) throws Exception {
         TestClone[] params1 = {a, a, a, a, a, a, a, a, a, a, a,
                                a, a, a, a, a, a, a, a, a, a, a,
                                a, a, a, a, a, a, a, a, a, a, a,
                                b, c, d};
 
+        MyClass1 obj1 = new MyClass1();
+        MyClass2 obj2 = new MyClass2();
+        MyClass3 obj3 = new MyClass3();
+        MyClass4 obj4 = new MyClass4();
+
         for (int i = 0; i < 15000; i++) {
-            f(params1[i % params1.length]);
+            test1(params1[i % params1.length]);
+
+            test2(obj1, true);
+            test2(obj2, true);
+
+            test3(obj3, false);
+            test3(obj2, true);
+
+            test4(obj3, false);
+            test4(obj4, false);
         }
 
-        Asserts.assertTrue(f(a) != a);
-        Asserts.assertTrue(f(b) == b);
-        Asserts.assertTrue(f(c) == c);
-        Asserts.assertTrue(f(d) == d);
+        Asserts.assertTrue(test1(a) != a);
+        Asserts.assertTrue(test1(b) == b);
+        Asserts.assertTrue(test1(c) == c);
+        Asserts.assertTrue(test1(d) == d);
 
         try {
-            f(null);
-            throw new AssertionError("");
+            test1(null);
+            throw new AssertionError("No exception thrown");
         } catch (NullPointerException e) { /* expected */ }
 
         System.out.println("TEST PASSED");