8339694: ciTypeFlow does not correctly handle unresolved constant dyn…

…amic of array type

Reviewed-by: kvn, vlivanov

src/hotspot/share/ci/ciTypeFlow.cpp

@@ -720,12 +720,18 @@ void ciTypeFlow::StateVector::do_jsr(ciBytecodeStream* str) {
 void ciTypeFlow::StateVector::do_ldc(ciBytecodeStream* str) {
   if (str->is_in_error()) {
     trap(str, nullptr, Deoptimization::make_trap_request(Deoptimization::Reason_unhandled,
-                                                      Deoptimization::Action_none));
+                                                         Deoptimization::Action_none));
     return;
   }
   ciConstant con = str->get_constant();
   if (con.is_valid()) {
     int cp_index = str->get_constant_pool_index();
+    if (!con.is_loaded()) {
+      trap(str, nullptr, Deoptimization::make_trap_request(Deoptimization::Reason_unloaded,
+                                                           Deoptimization::Action_reinterpret,
+                                                           cp_index));
+      return;
+    }
     BasicType basic_type = str->get_basic_type_for_constant_at(cp_index);
     if (is_reference_type(basic_type)) {
       ciObject* obj = con.as_object();
@@ -2207,11 +2213,10 @@ bool ciTypeFlow::can_trap(ciBytecodeStream& str) {
   if (!Bytecodes::can_trap(str.cur_bc()))  return false;
 
   switch (str.cur_bc()) {
-    // %%% FIXME: ldc of Class can generate an exception
     case Bytecodes::_ldc:
     case Bytecodes::_ldc_w:
     case Bytecodes::_ldc2_w:
-      return str.is_in_error();
+      return str.is_in_error() || !str.get_constant().is_loaded();
 
     case Bytecodes::_aload_0:
       // These bytecodes can trap for rewriting.  We need to assume that

src/hotspot/share/opto/parse2.cpp

@@ -1958,26 +1958,13 @@ void Parse::do_one_bytecode() {
   case Bytecodes::_ldc:
   case Bytecodes::_ldc_w:
   case Bytecodes::_ldc2_w: {
+    // ciTypeFlow should trap if the ldc is in error state or if the constant is not loaded
+    assert(!iter().is_in_error(), "ldc is in error state");
     ciConstant constant = iter().get_constant();
-    if (constant.is_loaded()) {
-      const Type* con_type = Type::make_from_constant(constant);
-      if (con_type != nullptr) {
-        push_node(con_type->basic_type(), makecon(con_type));
-      }
-    } else {
-      // If the constant is unresolved or in error state, run this BC in the interpreter.
-      if (iter().is_in_error()) {
-        uncommon_trap(Deoptimization::make_trap_request(Deoptimization::Reason_unhandled,
-                                                        Deoptimization::Action_none),
-                      nullptr, "constant in error state", true /* must_throw */);
-
-      } else {
-        int index = iter().get_constant_pool_index();
-        uncommon_trap(Deoptimization::make_trap_request(Deoptimization::Reason_unloaded,
-                                                        Deoptimization::Action_reinterpret,
-                                                        index),
-                      nullptr, "unresolved constant", false /* must_throw */);
-      }
+    assert(constant.is_loaded(), "constant is not loaded");
+    const Type* con_type = Type::make_from_constant(constant);
+    if (con_type != nullptr) {
+      push_node(con_type->basic_type(), makecon(con_type));
     }
     break;
   }

test/hotspot/jtreg/ProblemList-Xcomp.txt

@@ -55,5 +55,3 @@ vmTestbase/nsk/stress/thread/thread006.java 8321476 linux-all
 compiler/cha/TypeProfileFinalMethod.java 8341039 generic-all
 
 gc/arguments/TestNewSizeFlags.java 8299116 macosx-aarch64
-
-runtime/condy/escapeAnalysis/TestEscapeCondy.java 8339694 generic-all

test/hotspot/jtreg/compiler/c2/TestUnresolvedConstantDynamic.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright (c) 2024, 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
+ * 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 8339694
+ * @summary Test compilation of unresolved constant dynamics.
+ * @library /test/lib
+ * @compile TestUnresolvedConstantDynamicHelper.jasm
+ * @run driver TestUnresolvedConstantDynamic
+ * @run main/othervm -Xcomp -XX:-TieredCompilation -XX:CompileCommand=compileonly,TestUnresolvedConstantDynamicHelper::test* TestUnresolvedConstantDynamic
+ */
+
+import jdk.test.lib.Asserts;
+
+public class TestUnresolvedConstantDynamic {
+
+    public static void main(String[] args) {
+        Asserts.assertEquals(TestUnresolvedConstantDynamicHelper.testBooleanArray(true)[0], true);
+        Asserts.assertEquals(TestUnresolvedConstantDynamicHelper.testStringArray("42")[0], "42");
+    }
+}

test/hotspot/jtreg/compiler/c2/TestUnresolvedConstantDynamicHelper.jasm

@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2024, 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
+ * 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.
+ *
+ */
+
+public class TestUnresolvedConstantDynamicHelper version 55:0 {
+    public Method "<init>":"()V" stack 1 locals 1 {
+        aload_0;
+        invokespecial Method java/lang/Object."<init>":"()V";
+        return;
+    }
+
+    private static Method newBooleanArray:"(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/Class;)[Z" stack 1 locals 3 {
+        iconst_1;
+        newarray boolean;
+        areturn;
+    }
+
+    private static Method newStringArray:"(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/Class;)[Ljava/lang/String;" stack 1 locals 3 {
+        iconst_1;
+        anewarray class java/lang/String;
+        areturn;
+    }
+
+    public static Method testBooleanArray:"(Z)[Z" stack 4 locals 2 {
+        ldc Dynamic REF_invokeStatic:TestUnresolvedConstantDynamicHelper.newBooleanArray:"(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/Class;)[Z":name:"[Z";
+        dup;
+        iconst_0;
+        iload_0;
+        bastore;
+        areturn;
+    }
+
+    public static Method testStringArray:"(Ljava/lang/String;)[Ljava/lang/String;" stack 4 locals 2 {
+        ldc Dynamic REF_invokeStatic:TestUnresolvedConstantDynamicHelper.newStringArray:"(Ljava/lang/invoke/MethodHandles$Lookup;Ljava/lang/String;Ljava/lang/Class;)[Ljava/lang/String;":name:"[Ljava/lang/String;";
+        dup;
+        iconst_0;
+        aload_0;
+        aastore;
+        areturn;
+    }
+}