Merge

src/hotspot/cpu/aarch64/aarch64.ad

@@ -2413,6 +2413,11 @@ const bool Matcher::match_rule_supported_vector(int opcode, int vlen, BasicType
         return false;
       }
       break;
+     case Op_VectorMaskCmp:
+       if (vlen < 2 || bit_size < 64) {
+         return false;
+      }
+      break;
     default:
       break;
     }

src/hotspot/cpu/s390/templateTable_s390.cpp

@@ -3768,9 +3768,8 @@ void TemplateTable::_new() {
 
   // Get instance_size in InstanceKlass (scaled to a count of bytes).
   Register Rsize = offset;
-  const int mask = 1 << Klass::_lh_instance_slow_path_bit;
   __ z_llgf(Rsize, Address(iklass, Klass::layout_helper_offset()));
-  __ z_tmll(Rsize, mask);
+  __ z_tmll(Rsize, Klass::_lh_instance_slow_path_bit);
   __ z_btrue(slow_case);
 
   // Allocate the instance

src/hotspot/cpu/x86/c2_MacroAssembler_x86.cpp

@@ -1427,7 +1427,7 @@ void C2_MacroAssembler::evscatter(BasicType typ, Register base, XMMRegister idx,
   }
 }
 
-void C2_MacroAssembler::load_vector_mask(XMMRegister dst, XMMRegister src, int vlen_in_bytes, BasicType elem_bt) {
+void C2_MacroAssembler::load_vector_mask(XMMRegister dst, XMMRegister src, int vlen_in_bytes, BasicType elem_bt, bool is_legacy) {
   if (vlen_in_bytes <= 16) {
     pxor (dst, dst);
     psubb(dst, src);
@@ -1442,10 +1442,12 @@ void C2_MacroAssembler::load_vector_mask(XMMRegister dst, XMMRegister src, int v
       default: assert(false, "%s", type2name(elem_bt));
     }
   } else {
+    assert(!is_legacy || !is_subword_type(elem_bt) || vlen_in_bytes < 64, "");
     int vlen_enc = vector_length_encoding(vlen_in_bytes);
 
     vpxor (dst, dst, dst, vlen_enc);
-    vpsubb(dst, dst, src, vlen_enc);
+    vpsubb(dst, dst, src, is_legacy ? AVX_256bit : vlen_enc);
+
     switch (elem_bt) {
       case T_BYTE:   /* nothing to do */            break;
       case T_SHORT:  vpmovsxbw(dst, dst, vlen_enc); break;
@@ -1461,7 +1463,11 @@ void C2_MacroAssembler::load_vector_mask(XMMRegister dst, XMMRegister src, int v
 
 void C2_MacroAssembler::load_iota_indices(XMMRegister dst, Register scratch, int vlen_in_bytes) {
   ExternalAddress addr(StubRoutines::x86::vector_iota_indices());
-  if (vlen_in_bytes <= 16) {
+  if (vlen_in_bytes == 4) {
+    movdl(dst, addr);
+  } else if (vlen_in_bytes == 8) {
+    movq(dst, addr);
+  } else if (vlen_in_bytes == 16) {
     movdqu(dst, addr, scratch);
   } else if (vlen_in_bytes == 32) {
     vmovdqu(dst, addr, scratch);
@@ -1470,6 +1476,7 @@ void C2_MacroAssembler::load_iota_indices(XMMRegister dst, Register scratch, int
     evmovdqub(dst, k0, addr, false /*merge*/, Assembler::AVX_512bit, scratch);
   }
 }
+
 // Reductions for vectors of bytes, shorts, ints, longs, floats, and doubles.
 
 void C2_MacroAssembler::reduce_operation_128(BasicType typ, int opcode, XMMRegister dst, XMMRegister src) {

src/hotspot/cpu/x86/c2_MacroAssembler_x86.hpp

@@ -141,7 +141,7 @@ public:
   void evpcmp(BasicType typ, KRegister kdmask, KRegister ksmask, XMMRegister src1, XMMRegister src2, int comparison, int vector_len);
   void evpblend(BasicType typ, XMMRegister dst, KRegister kmask, XMMRegister src1, XMMRegister src2, bool merge, int vector_len);
 
-  void load_vector_mask(XMMRegister dst, XMMRegister src, int vlen_in_bytes, BasicType elem_bt);
+  void load_vector_mask(XMMRegister dst, XMMRegister src, int vlen_in_bytes, BasicType elem_bt, bool is_legacy);
   void load_iota_indices(XMMRegister dst, Register scratch, int vlen_in_bytes);
 
   // vector compare

src/hotspot/cpu/x86/x86.ad

@@ -1835,6 +1835,11 @@ const bool Matcher::match_rule_supported_vector(int opcode, int vlen, BasicType
         return false;
       }
       break;
+    case Op_VectorMaskCmp:
+      if (vlen < 2 || size_in_bits < 32) {
+        return false;
+      }
+      break;
   }
   return true;  // Per default match rules are supported.
 }
@@ -6906,7 +6911,7 @@ instruct evcmpFD(vec dst, vec src1, vec src2, immI8 cond, rRegP scratch, kReg kt
 instruct vcmp(legVec dst, legVec src1, legVec src2, immI8 cond, rRegP scratch) %{
   predicate((UseAVX <= 2 || !VM_Version::supports_avx512vl()) &&
             !is_unsigned_booltest_pred(n->in(2)->get_int()) &&
-            vector_length_in_bytes(n->in(1)->in(1)) >=  8 && // src1
+            vector_length_in_bytes(n->in(1)->in(1)) >=  4 && // src1
             vector_length_in_bytes(n->in(1)->in(1)) <= 32 && // src1
             is_integral_type(vector_element_basic_type(n->in(1)->in(1)))); // src1
   match(Set dst (VectorMaskCmp (Binary src1 src2) cond));
@@ -7442,7 +7447,8 @@ instruct cmpvptest_anytrue_evex(rFlagsReg cr, legVec src1, legVec src2, immI_0 z
 
 //------------------------------------- LoadMask --------------------------------------------
 
-instruct loadMask(vec dst, vec src) %{
+instruct loadMask(legVec dst, legVec src) %{
+  predicate(!VM_Version::supports_avx512vlbw());
   match(Set dst (VectorLoadMask src));
   effect(TEMP dst);
   format %{ "vector_loadmask_byte $dst,$src\n\t" %}
@@ -7450,7 +7456,21 @@ instruct loadMask(vec dst, vec src) %{
     int vlen_in_bytes = vector_length_in_bytes(this);
     BasicType elem_bt = vector_element_basic_type(this);
 
-    __ load_vector_mask($dst$$XMMRegister, $src$$XMMRegister, vlen_in_bytes, elem_bt);
+    __ load_vector_mask($dst$$XMMRegister, $src$$XMMRegister, vlen_in_bytes, elem_bt, true);
+  %}
+  ins_pipe( pipe_slow );
+%}
+
+instruct loadMask_evex(vec dst, vec src) %{
+  predicate(VM_Version::supports_avx512vlbw());
+  match(Set dst (VectorLoadMask src));
+  effect(TEMP dst);
+  format %{ "vector_loadmask_byte $dst,$src\n\t" %}
+  ins_encode %{
+    int vlen_in_bytes = vector_length_in_bytes(this);
+    BasicType elem_bt = vector_element_basic_type(this);
+
+    __ load_vector_mask($dst$$XMMRegister, $src$$XMMRegister, vlen_in_bytes, elem_bt, false);
   %}
   ins_pipe( pipe_slow );
 %}

src/hotspot/share/gc/parallel/parallelArguments.cpp

@@ -87,7 +87,7 @@ void ParallelArguments::initialize() {
   }
 
   if (FLAG_IS_DEFAULT(ParallelRefProcEnabled) && ParallelGCThreads > 1) {
-    //FLAG_SET_DEFAULT(ParallelRefProcEnabled, true);
+    FLAG_SET_DEFAULT(ParallelRefProcEnabled, true);
   }
 }
 

src/hotspot/share/gc/shared/copyFailedInfo.hpp

@@ -71,12 +71,7 @@ class PromotionFailedInfo : public CopyFailedInfo {
 
   void register_copy_failure(size_t size) {
     CopyFailedInfo::register_copy_failure(size);
-    if (_thread_trace_id == 0) {
+    _thread_trace_id = JFR_THREAD_ID(Thread::current());
-      _thread_trace_id = JFR_THREAD_ID(Thread::current());
-    } else {
-      assert(JFR_THREAD_ID(Thread::current()) == _thread_trace_id,
-        "The PromotionFailedInfo should be thread local.");
-    }
   }
 
   void reset() {

src/hotspot/share/opto/vectorIntrinsics.cpp

@@ -411,9 +411,6 @@ bool LibraryCallKit::inline_vector_shuffle_iota() {
   int num_elem = vlen->get_con();
   BasicType elem_bt = T_BYTE;
 
-  if (num_elem < 4)
-    return false;
-
   if (!arch_supports_vector(VectorNode::replicate_opcode(elem_bt), num_elem, elem_bt, VecMaskNotUsed)) {
     return false;
   }

src/hotspot/share/runtime/safepoint.cpp

@@ -928,6 +928,7 @@ void ThreadSafepointState::handle_polling_page_exception() {
   if( nm->is_at_poll_return(real_return_addr) ) {
     // See if return type is an oop.
     bool return_oop = nm->method()->is_returning_oop();
+    HandleMark hm(self);
     Handle return_value;
     if (return_oop) {
       // The oop result has been saved on the stack together with all

src/java.base/share/classes/java/lang/ref/PhantomReference.java

@@ -43,6 +43,8 @@ import jdk.internal.vm.annotation.IntrinsicCandidate;
  * <p> In order to ensure that a reclaimable object remains so, the referent of
  * a phantom reference may not be retrieved: The {@code get} method of a
  * phantom reference always returns {@code null}.
+ * The {@link #refersTo(Object) refersTo} method can be used to test
+ * whether some object is the referent of a phantom reference.
  *
  * @author   Mark Reinhold
  * @since    1.2
@@ -75,9 +77,7 @@ public class PhantomReference<T> extends Reference<T> {
      * is registered with the given queue.
      *
      * <p> It is possible to create a phantom reference with a {@code null}
-     * queue, but such a reference is completely useless: Its {@code get}
+     * queue.  Such a reference will never be enqueued.
-     * method will always return {@code null} and, since it does not have a queue,
-     * it will never be enqueued.
      *
      * @param referent the object the new phantom reference will refer to
      * @param q the queue with which the reference is to be registered,

src/java.base/share/classes/java/util/Locale.java

@@ -455,9 +455,11 @@ import sun.util.locale.provider.TimeZoneNameUtility;
  *
  * <p>For the backward compatible behavior, the system property
  * {@systemProperty java.locale.useOldISOCodes} reverts the behavior
- * back to prior to Java SE 17 one. If the system property is set
+ * back to that of before Java SE 17. If the system property is set to
- * to {@code true}, those three current language codes are mapped to their
+ * {@code true}, those three current language codes are mapped to their
- * backward compatible forms.
+ * backward compatible forms. The property is only read at Java runtime
+ * startup and subsequent calls to {@code System.setProperty()} will
+ * have no effect.
  *
  * <p>The APIs added in 1.7 map between the old and new language codes,
  * maintaining the mapped codes internal to Locale (so that

src/jdk.compiler/share/classes/com/sun/tools/javac/comp/Attr.java

@@ -169,6 +169,8 @@ public class Attr extends JCTree.Visitor {
         allowStaticInterfaceMethods = Feature.STATIC_INTERFACE_METHODS.allowedInSource(source);
         allowReifiableTypesInInstanceof = Feature.REIFIABLE_TYPES_INSTANCEOF.allowedInSource(source);
         allowRecords = Feature.RECORDS.allowedInSource(source);
+        allowPatternSwitch = (preview.isEnabled() || !preview.isPreview(Feature.PATTERN_SWITCH)) &&
+                             Feature.PATTERN_SWITCH.allowedInSource(source);
         sourceName = source.name;
         useBeforeDeclarationWarning = options.isSet("useBeforeDeclarationWarning");
 
@@ -209,6 +211,10 @@ public class Attr extends JCTree.Visitor {
      */
     private final boolean allowRecords;
 
+    /** Are patterns in switch allowed
+     */
+    private final boolean allowPatternSwitch;
+
     /**
      * Switch: warn about use of variable before declaration?
      * RFE: 6425594
@@ -1724,14 +1730,22 @@ public class Attr extends JCTree.Visitor {
                                 rs.basicLogResolveHelper = prevResolveHelper;
                             }
                         } else {
-                            Type pattype = attribExpr(expr, switchEnv, seltype);
+                            ResultInfo valTypInfo = new ResultInfo(KindSelector.VAL_TYP,
+                                                                   !seltype.hasTag(ERROR) ? seltype
+                                                                                          : Type.noType);
+                            Type pattype = attribTree(expr, switchEnv, valTypInfo);
                             if (!pattype.hasTag(ERROR)) {
-                                if (!stringSwitch && !types.isAssignable(seltype, syms.intType)) {
-                                    log.error(pat.pos(), Errors.ConstantLabelNotCompatible(pattype, seltype));
-                                }
                                 if (pattype.constValue() == null) {
-                                    log.error(expr.pos(),
+                                    Symbol s = TreeInfo.symbol(expr);
-                                              (stringSwitch ? Errors.StringConstReq : Errors.ConstExprReq));
+                                    if (s != null && s.kind == TYP && allowPatternSwitch) {
+                                        log.error(expr.pos(),
+                                                  Errors.PatternExpected);
+                                    } else {
+                                        log.error(expr.pos(),
+                                                  (stringSwitch ? Errors.StringConstReq : Errors.ConstExprReq));
+                                    }
+                                } else if (!stringSwitch && !types.isAssignable(seltype, syms.intType)) {
+                                    log.error(pat.pos(), Errors.ConstantLabelNotCompatible(pattype, seltype));
                                 } else if (!labels.add(pattype.constValue())) {
                                     log.error(c.pos(), Errors.DuplicateCaseLabel);
                                 } else {

src/jdk.compiler/share/classes/com/sun/tools/javac/jvm/Gen.java

@@ -1375,8 +1375,7 @@ public class Gen extends JCTree.Visitor {
 
             if (switchEnv.info.cont != null) {
                 Assert.check(patternSwitch);
-                code.resolve(switchEnv.info.cont);
+                code.resolve(switchEnv.info.cont, switchStart);
-                code.resolve(code.branch(goto_), switchStart);
             }
 
             // Resolve all breaks.

src/jdk.compiler/share/classes/com/sun/tools/javac/resources/compiler.properties

@@ -1189,6 +1189,9 @@ compiler.err.static.imp.only.classes.and.interfaces=\
 compiler.err.string.const.req=\
     constant string expression required
 
+compiler.err.pattern.expected=\
+    type pattern expected
+
 # 0: symbol, 1: fragment
 compiler.err.cannot.generate.class=\
     error while generating class {0}\n\

src/jdk.javadoc/share/classes/jdk/javadoc/internal/doclets/toolkit/resources/stylesheet.css

@@ -350,14 +350,12 @@ ul.see-list-long li:not(:last-child):after {
 /*
  * Styles for tables.
  */
-.summary-table {
+.summary-table, .details-table {
     width:100%;
     border-spacing:0;
     border-left:1px solid #EEE;
     border-right:1px solid #EEE;
     border-bottom:1px solid #EEE;
-}
-.summary-table {
     padding:0;
 }
 .caption {
@@ -445,7 +443,7 @@ div.table-tabs > button.table-tab {
         grid-template-columns: minmax(15%, max-content) minmax(15%, auto);
     }
 }
-.summary-table > div {
+.summary-table > div, .details-table > div {
     text-align:left;
     padding: 8px 3px 3px 7px;
 }

test/hotspot/jtreg/ProblemList-Xcomp.txt

@@ -32,3 +32,5 @@ compiler/intrinsics/bmi/verifycode/BzhiTestI2L.java 8268033 generic-x64
 vmTestbase/nsk/jvmti/SetFieldAccessWatch/setfldw001/TestDescription.java 8205957 generic-all
 
 vmTestbase/vm/mlvm/mixed/stress/regression/b6969574/INDIFY_Test.java 8265295 linux-x64,windows-x64
+
+vmTestbase/nsk/jvmti/scenarios/sampling/SP07/sp07t002/TestDescription.java 8245680 windows-x64

test/hotspot/jtreg/compiler/compilercontrol/share/MultiCommand.java

@@ -72,7 +72,9 @@ public class MultiCommand extends AbstractTestBase {
 
             Executable exec = Utils.getRandomElement(METHODS).first;
             MethodDescriptor md;
-            if (validOnly) {
+
+            // Command.quiet discards the method descriptor - can never fail on the method descriptor
+            if (validOnly || cmd == Command.QUIET) {
                 md = AbstractTestBase.getValidMethodDescriptor(exec);
             } else {
                 md = AbstractTestBase.METHOD_GEN.generateRandomDescriptor(exec);

test/hotspot/jtreg/compiler/vectorapi/TestVectorShuffleIota.java

@@ -0,0 +1,58 @@
+/*
+ * Copyright (c) 2021, Huawei Technologies Co. Ltd. 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.
+ */
+
+package compiler.vectorapi;
+
+import jdk.incubator.vector.IntVector;
+import jdk.incubator.vector.VectorSpecies;
+import jdk.incubator.vector.VectorShuffle;
+
+/*
+ * @test
+ * @bug 8265907
+ * @modules jdk.incubator.vector
+ * @run main/othervm compiler.vectorapi.TestVectorShuffleIota
+ */
+
+public class TestVectorShuffleIota {
+    static final VectorSpecies<Integer> SPECIESi = IntVector.SPECIES_128;
+
+    static final int INVOC_COUNT = 50000;
+
+    static int[] ai = {87, 65, 78, 71};
+
+    static void testShuffleI() {
+        IntVector iv = (IntVector) VectorShuffle.iota(SPECIESi, 0, 2, false).toVector();
+        iv.intoArray(ai, 0);
+    }
+
+    public static void main(String[] args) {
+        for (int i = 0; i < INVOC_COUNT; i++) {
+            testShuffleI();
+        }
+        for (int i = 0; i < ai.length; i++) {
+            System.out.print(ai[i] + ", ");
+        }
+        System.out.println();
+    }
+}

test/hotspot/jtreg/gc/arguments/TestParallelRefProc.java

@@ -51,7 +51,7 @@ public class TestParallelRefProc {
         }
         if (GC.Parallel.isSupported()) {
             noneGCSupported = false;
-            testFlag(new String[] { "-XX:+UseParallelGC" }, false);
+            testFlag(new String[] { "-XX:+UseParallelGC" }, true);
         }
         if (GC.G1.isSupported()) {
             noneGCSupported = false;

test/hotspot/jtreg/vmTestbase/vm/mlvm/anonloader/stress/oome/metaspace/Test.java

@@ -24,38 +24,70 @@
 
 /*
  * @test
+ * @modules java.base/jdk.internal.misc
  *
  * @summary converted from VM Testbase vm/mlvm/anonloader/stress/oome/metaspace.
  * VM Testbase keywords: [feature_mlvm, nonconcurrent]
  *
- * @library /test/lib
+ * @library /vmTestbase
+ *          /test/lib
  *
- * @run driver vm.mlvm.anonloader.stress.oome.metaspace.Test
+ * @comment build test class and indify classes
+ * @build vm.mlvm.anonloader.stress.oome.metaspace.Test
+ * @run driver vm.mlvm.share.IndifiedClassesBuilder
+ *
+ * @run main/othervm -XX:MaxRAMPercentage=25 -XX:-UseGCOverheadLimit -XX:MetaspaceSize=10m
+ *                   -XX:MaxMetaspaceSize=20m vm.mlvm.anonloader.stress.oome.metaspace.Test
  */
 
 package vm.mlvm.anonloader.stress.oome.metaspace;
 
-import jdk.test.lib.process.OutputAnalyzer;
+import java.lang.invoke.MethodHandles;
-import jdk.test.lib.process.ProcessTools;
+import java.lang.invoke.MethodHandles.Lookup;
+import java.util.List;
+import java.io.IOException;
 
-public class Test {
+import vm.mlvm.anonloader.share.AnonkTestee01;
+import vm.mlvm.share.MlvmOOMTest;
+import vm.mlvm.share.MlvmTestExecutor;
+import vm.mlvm.share.Env;
+import vm.share.FileUtils;
 
-    public static void main(String[] args) throws Exception {
+/**
-        ProcessBuilder pb = ProcessTools.createJavaProcessBuilder(
+ * This test loads classes using defineHiddenClass and stores them,
-            "-Xshare:off", "-XX:MaxMetaspaceSize=512k", "-version");
+ * expecting Metaspace OOME.
-
+ *
-        OutputAnalyzer analyzer = new OutputAnalyzer(pb.start());
+ */
-
+public class Test extends MlvmOOMTest {
-        analyzer.shouldNotHaveExitValue(0);
+    @Override
-
+    protected void checkOOME(OutOfMemoryError oome) {
-        if (!analyzer.getStdout().contains("OutOfMemoryError")) {
+        String message = oome.getMessage();
-            throw new RuntimeException("TEST FAIL : no OOME");
+        if (!"Metaspace".equals(message) && !"Compressed class space".equals(message)) {
-        }
+            throw new RuntimeException("TEST FAIL : wrong OOME", oome);
-
-        if (!analyzer.getStdout().contains("Metaspace") &&
-            !analyzer.getStdout().contains("Compressed class space")) {
-            throw new RuntimeException("TEST FAIL : wrong OOME");
         }
     }
 
+    @Override
+    protected void eatMemory(List<Object> list) {
+        byte[] classBytes = null;
+        try {
+            classBytes = FileUtils.readClass(AnonkTestee01.class.getName());
+        } catch (IOException e) {
+            Env.throwAsUncheckedException(e);
+        }
+        try {
+            while (true) {
+                Lookup lookup = MethodHandles.lookup();
+                Lookup ank_lookup = MethodHandles.privateLookupIn(AnonkTestee01.class, lookup);
+                Class<?> c = ank_lookup.defineHiddenClass(classBytes, true).lookupClass();
+                list.add(c.newInstance());
+             }
+         } catch (InstantiationException | IllegalAccessException e) {
+             Env.throwAsUncheckedException(e);
+         }
+    }
+
+    public static void main(String[] args) {
+        MlvmTestExecutor.launch(args);
+    }
 }

test/jdk/ProblemList.txt

@@ -580,7 +580,7 @@ com/sun/management/OperatingSystemMXBean/GetSystemCpuLoad.java  8030957 aix-all
 
 java/lang/management/ThreadMXBean/ThreadMXBeanStateTest.java    8247426 generic-all
 
-sun/management/jdp/JdpDefaultsTest.java                         8241865 macosx-all
+sun/management/jdp/JdpDefaultsTest.java                         8241865 linux-aarch64,macosx-all
 sun/management/jdp/JdpJmxRemoteDynamicPortTest.java             8241865 macosx-all
 sun/management/jdp/JdpSpecificAddressTest.java                  8241865 macosx-all
 

test/jdk/java/lang/reflect/exeCallerAccessTest/CallerAccessTest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2019, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2019, 2021, 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
@@ -37,7 +37,6 @@
 import java.io.File;
 import java.util.Map;
 import jdk.test.lib.Platform;
-import jdk.test.lib.Utils;
 import jdk.test.lib.process.OutputAnalyzer;
 
 import java.io.IOException;
@@ -50,17 +49,15 @@ public class CallerAccessTest {
         ProcessBuilder pb = new ProcessBuilder(launcher.toString());
         Map<String, String> env = pb.environment();
 
-        String libName = Platform.isWindows() ? "bin" : "lib";
+        String libDir = Platform.libDir().toString();
-        Path libPath = Paths.get(Utils.TEST_JDK).resolve(libName);
+        String vmDir = Platform.jvmLibDir().toString();
-        String libDir = libPath.toAbsolutePath().toString();
-        String serverDir = libPath.resolve("server").toAbsolutePath().toString();
 
         // set up shared library path
         String sharedLibraryPathEnvName = Platform.sharedLibraryPathVariableName();
         env.compute(sharedLibraryPathEnvName,
                     (k, v) -> (v == null) ? libDir : v + File.pathSeparator + libDir);
         env.compute(sharedLibraryPathEnvName,
-                    (k, v) -> (v == null) ? serverDir : v + File.pathSeparator + serverDir);
+                    (k, v) -> (v == null) ? vmDir : v + File.pathSeparator + vmDir);
 
         System.out.println("Launching: " + launcher + " shared library path: " +
                            env.get(sharedLibraryPathEnvName));

test/langtools/jdk/javadoc/doclet/checkStylesheetClasses/CheckStylesheetClasses.java

@@ -120,7 +120,7 @@ public class CheckStylesheetClasses {
                 "modifiers", "permits", "return-type");
 
         // misc: these are defined in HtmlStyle, and used by the doclet
-        removeAll(htmlStyleNames, "col-plain", "details-table", "external-link",
+        removeAll(htmlStyleNames, "col-plain", "external-link",
                 "hierarchy", "index", "package-uses", "packages", "permits-note",
                 "serialized-package-container", "source-container");
 

test/langtools/jdk/javadoc/doclet/testStylesheet/TestStylesheet.java

@@ -140,7 +140,7 @@ public class TestStylesheet extends JavadocTester {
                         overflow: auto;
                     }""",
                 """
-                    .summary-table > div {
+                    .summary-table > div, .details-table > div {
                         text-align:left;
                         padding: 8px 3px 3px 7px;
                     }""",

test/langtools/tools/javac/diags/examples/PatternExpected.java

@@ -0,0 +1,36 @@
+/*
+ * Copyright (c) 2021, 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.
+ */
+
+// key: compiler.err.pattern.expected
+// key: compiler.note.preview.filename
+// key: compiler.note.preview.recompile
+// options: --enable-preview -source ${jdk.version}
+
+class PatternSwitch {
+    private void doSwitch(Object o) {
+        switch (o) {
+            case String: break;
+            default: break;
+        }
+    }
+}

test/langtools/tools/javac/patterns/SwitchErrors-no-preview.out

@@ -0,0 +1,42 @@
+SwitchErrors.java:35:31: compiler.err.preview.feature.disabled.plural: (compiler.misc.feature.pattern.switch)
+SwitchErrors.java:34:18: compiler.err.constant.label.not.compatible: java.lang.String, java.lang.Object
+SwitchErrors.java:40:18: compiler.err.constant.label.not.compatible: int, java.lang.Object
+SwitchErrors.java:46:18: compiler.err.prob.found.req: (compiler.misc.inconvertible.types: java.lang.String, java.lang.Integer)
+SwitchErrors.java:47:18: compiler.err.prob.found.req: (compiler.misc.inconvertible.types: java.lang.Integer, java.lang.CharSequence)
+SwitchErrors.java:52:18: compiler.err.preview.feature.disabled: (compiler.misc.feature.case.null)
+SwitchErrors.java:53:18: compiler.err.prob.found.req: (compiler.misc.inconvertible.types: java.lang.String, int)
+SwitchErrors.java:54:18: compiler.err.prob.found.req: (compiler.misc.inconvertible.types: int, java.lang.CharSequence)
+SwitchErrors.java:60:20: compiler.err.total.pattern.and.default
+SwitchErrors.java:66:13: compiler.err.pattern.dominated
+SwitchErrors.java:72:18: compiler.err.total.pattern.and.default
+SwitchErrors.java:78:18: compiler.err.duplicate.total.pattern
+SwitchErrors.java:84:20: compiler.err.duplicate.default.label
+SwitchErrors.java:90:20: compiler.err.duplicate.default.label
+SwitchErrors.java:101:13: compiler.err.duplicate.case.label
+SwitchErrors.java:106:13: compiler.err.duplicate.case.label
+SwitchErrors.java:111:28: compiler.err.flows.through.to.pattern
+SwitchErrors.java:117:18: compiler.err.flows.through.to.pattern
+SwitchErrors.java:124:18: compiler.err.flows.through.to.pattern
+SwitchErrors.java:131:18: compiler.err.flows.through.to.pattern
+SwitchErrors.java:136:18: compiler.err.prob.found.req: (compiler.misc.inconvertible.types: java.lang.String, java.lang.Integer)
+SwitchErrors.java:142:18: compiler.err.instanceof.reifiable.not.safe: java.util.List, java.util.List<java.lang.Integer>
+SwitchErrors.java:148:18: compiler.err.cant.resolve.location: kindname.class, Undefined, , , (compiler.misc.location: kindname.class, SwitchErrors, null)
+SwitchErrors.java:155:18: compiler.err.type.found.req: int, (compiler.misc.type.req.class.array)
+SwitchErrors.java:172:27: compiler.err.flows.through.to.pattern
+SwitchErrors.java:178:18: compiler.err.flows.through.to.pattern
+SwitchErrors.java:184:13: compiler.err.pattern.dominated
+SwitchErrors.java:196:18: compiler.err.const.expr.req
+SwitchErrors.java:202:76: compiler.err.cant.resolve.location: kindname.variable, n, , , (compiler.misc.location: kindname.class, SwitchErrors, null)
+SwitchErrors.java:208:71: compiler.err.cant.resolve.location: kindname.variable, n, , , (compiler.misc.location: kindname.class, SwitchErrors, null)
+SwitchErrors.java:33:9: compiler.err.not.exhaustive.statement
+SwitchErrors.java:39:9: compiler.err.not.exhaustive.statement
+SwitchErrors.java:45:9: compiler.err.not.exhaustive.statement
+SwitchErrors.java:51:9: compiler.err.not.exhaustive.statement
+SwitchErrors.java:99:9: compiler.err.not.exhaustive.statement
+SwitchErrors.java:105:9: compiler.err.not.exhaustive.statement
+SwitchErrors.java:110:9: compiler.err.not.exhaustive.statement
+SwitchErrors.java:115:9: compiler.err.not.exhaustive.statement
+SwitchErrors.java:121:9: compiler.err.not.exhaustive.statement
+SwitchErrors.java:128:9: compiler.err.not.exhaustive.statement
+SwitchErrors.java:188:9: compiler.err.not.exhaustive.statement
+41 errors

test/langtools/tools/javac/patterns/SwitchErrors.java

@@ -26,6 +26,7 @@
  * @bug 8262891
  * @summary Verify errors related to pattern switches.
  * @compile/fail/ref=SwitchErrors.out --enable-preview -source ${jdk.version} -XDrawDiagnostics -XDshould-stop.at=FLOW SwitchErrors.java
+ * @compile/fail/ref=SwitchErrors-no-preview.out -XDrawDiagnostics -XDshould-stop.at=FLOW SwitchErrors.java
  */
 public class SwitchErrors {
     void incompatibleSelectorObjectString(Object o) {
@@ -190,6 +191,12 @@ public class SwitchErrors {
     }
     sealed class SealedNonAbstract permits A {}
     final class A extends SealedNonAbstract {}
+    void errorRecoveryNoPattern1(Object o) {
+        switch (o) {
+            case String: break;
+            case Object obj: break;
+        }
+    }
     Object guardWithMatchingStatement(Object o1, Object o2) {
         switch (o1) {
             case String s && s.isEmpty() || o2 instanceof Number n: return n;

test/langtools/tools/javac/patterns/SwitchErrors.out

@@ -1,46 +1,47 @@
-SwitchErrors.java:33:18: compiler.err.constant.label.not.compatible: java.lang.String, java.lang.Object
+SwitchErrors.java:34:18: compiler.err.constant.label.not.compatible: java.lang.String, java.lang.Object
-SwitchErrors.java:39:18: compiler.err.constant.label.not.compatible: int, java.lang.Object
+SwitchErrors.java:40:18: compiler.err.constant.label.not.compatible: int, java.lang.Object
-SwitchErrors.java:45:18: compiler.err.prob.found.req: (compiler.misc.inconvertible.types: java.lang.String, java.lang.Integer)
+SwitchErrors.java:46:18: compiler.err.prob.found.req: (compiler.misc.inconvertible.types: java.lang.String, java.lang.Integer)
-SwitchErrors.java:46:18: compiler.err.prob.found.req: (compiler.misc.inconvertible.types: java.lang.Integer, java.lang.CharSequence)
+SwitchErrors.java:47:18: compiler.err.prob.found.req: (compiler.misc.inconvertible.types: java.lang.Integer, java.lang.CharSequence)
-SwitchErrors.java:51:18: compiler.err.prob.found.req: (compiler.misc.inconvertible.types: compiler.misc.type.null, int)
+SwitchErrors.java:52:18: compiler.err.prob.found.req: (compiler.misc.inconvertible.types: compiler.misc.type.null, int)
-SwitchErrors.java:52:18: compiler.err.prob.found.req: (compiler.misc.inconvertible.types: java.lang.String, int)
+SwitchErrors.java:53:18: compiler.err.prob.found.req: (compiler.misc.inconvertible.types: java.lang.String, int)
-SwitchErrors.java:53:18: compiler.err.prob.found.req: (compiler.misc.inconvertible.types: int, java.lang.CharSequence)
+SwitchErrors.java:54:18: compiler.err.prob.found.req: (compiler.misc.inconvertible.types: int, java.lang.CharSequence)
-SwitchErrors.java:59:20: compiler.err.total.pattern.and.default
+SwitchErrors.java:60:20: compiler.err.total.pattern.and.default
-SwitchErrors.java:65:13: compiler.err.pattern.dominated
+SwitchErrors.java:66:13: compiler.err.pattern.dominated
-SwitchErrors.java:65:24: compiler.err.total.pattern.and.default
+SwitchErrors.java:66:24: compiler.err.total.pattern.and.default
-SwitchErrors.java:71:18: compiler.err.total.pattern.and.default
+SwitchErrors.java:72:18: compiler.err.total.pattern.and.default
-SwitchErrors.java:77:18: compiler.err.duplicate.total.pattern
+SwitchErrors.java:78:18: compiler.err.duplicate.total.pattern
-SwitchErrors.java:83:20: compiler.err.duplicate.default.label
+SwitchErrors.java:84:20: compiler.err.duplicate.default.label
-SwitchErrors.java:89:20: compiler.err.duplicate.default.label
+SwitchErrors.java:90:20: compiler.err.duplicate.default.label
-SwitchErrors.java:94:27: compiler.err.duplicate.default.label
+SwitchErrors.java:95:27: compiler.err.duplicate.default.label
-SwitchErrors.java:100:13: compiler.err.duplicate.case.label
+SwitchErrors.java:101:13: compiler.err.duplicate.case.label
-SwitchErrors.java:105:13: compiler.err.duplicate.case.label
+SwitchErrors.java:106:13: compiler.err.duplicate.case.label
-SwitchErrors.java:110:28: compiler.err.flows.through.to.pattern
+SwitchErrors.java:111:28: compiler.err.flows.through.to.pattern
-SwitchErrors.java:116:18: compiler.err.flows.through.to.pattern
+SwitchErrors.java:117:18: compiler.err.flows.through.to.pattern
-SwitchErrors.java:123:18: compiler.err.flows.through.to.pattern
+SwitchErrors.java:124:18: compiler.err.flows.through.to.pattern
-SwitchErrors.java:130:18: compiler.err.flows.through.to.pattern
+SwitchErrors.java:131:18: compiler.err.flows.through.to.pattern
-SwitchErrors.java:135:18: compiler.err.prob.found.req: (compiler.misc.inconvertible.types: java.lang.String, java.lang.Integer)
+SwitchErrors.java:136:18: compiler.err.prob.found.req: (compiler.misc.inconvertible.types: java.lang.String, java.lang.Integer)
-SwitchErrors.java:141:18: compiler.err.instanceof.reifiable.not.safe: java.util.List, java.util.List<java.lang.Integer>
+SwitchErrors.java:142:18: compiler.err.instanceof.reifiable.not.safe: java.util.List, java.util.List<java.lang.Integer>
-SwitchErrors.java:147:18: compiler.err.cant.resolve.location: kindname.class, Undefined, , , (compiler.misc.location: kindname.class, SwitchErrors, null)
+SwitchErrors.java:148:18: compiler.err.cant.resolve.location: kindname.class, Undefined, , , (compiler.misc.location: kindname.class, SwitchErrors, null)
-SwitchErrors.java:154:18: compiler.err.type.found.req: int, (compiler.misc.type.req.class.array)
+SwitchErrors.java:155:18: compiler.err.type.found.req: int, (compiler.misc.type.req.class.array)
-SwitchErrors.java:160:28: compiler.err.flows.through.from.pattern
+SwitchErrors.java:161:28: compiler.err.flows.through.from.pattern
-SwitchErrors.java:166:18: compiler.err.flows.through.from.pattern
+SwitchErrors.java:167:18: compiler.err.flows.through.from.pattern
-SwitchErrors.java:171:27: compiler.err.flows.through.to.pattern
+SwitchErrors.java:172:27: compiler.err.flows.through.to.pattern
-SwitchErrors.java:177:18: compiler.err.flows.through.to.pattern
+SwitchErrors.java:178:18: compiler.err.flows.through.to.pattern
-SwitchErrors.java:183:13: compiler.err.pattern.dominated
+SwitchErrors.java:184:13: compiler.err.pattern.dominated
-SwitchErrors.java:195:76: compiler.err.cant.resolve.location: kindname.variable, n, , , (compiler.misc.location: kindname.class, SwitchErrors, null)
+SwitchErrors.java:196:18: compiler.err.pattern.expected
-SwitchErrors.java:201:71: compiler.err.cant.resolve.location: kindname.variable, n, , , (compiler.misc.location: kindname.class, SwitchErrors, null)
+SwitchErrors.java:202:76: compiler.err.cant.resolve.location: kindname.variable, n, , , (compiler.misc.location: kindname.class, SwitchErrors, null)
-SwitchErrors.java:32:9: compiler.err.not.exhaustive.statement
+SwitchErrors.java:208:71: compiler.err.cant.resolve.location: kindname.variable, n, , , (compiler.misc.location: kindname.class, SwitchErrors, null)
-SwitchErrors.java:38:9: compiler.err.not.exhaustive.statement
+SwitchErrors.java:33:9: compiler.err.not.exhaustive.statement
-SwitchErrors.java:44:9: compiler.err.not.exhaustive.statement
+SwitchErrors.java:39:9: compiler.err.not.exhaustive.statement
-SwitchErrors.java:50:9: compiler.err.not.exhaustive.statement
+SwitchErrors.java:45:9: compiler.err.not.exhaustive.statement
-SwitchErrors.java:98:9: compiler.err.not.exhaustive.statement
+SwitchErrors.java:51:9: compiler.err.not.exhaustive.statement
-SwitchErrors.java:104:9: compiler.err.not.exhaustive.statement
+SwitchErrors.java:99:9: compiler.err.not.exhaustive.statement
-SwitchErrors.java:109:9: compiler.err.not.exhaustive.statement
+SwitchErrors.java:105:9: compiler.err.not.exhaustive.statement
-SwitchErrors.java:114:9: compiler.err.not.exhaustive.statement
+SwitchErrors.java:110:9: compiler.err.not.exhaustive.statement
-SwitchErrors.java:120:9: compiler.err.not.exhaustive.statement
+SwitchErrors.java:115:9: compiler.err.not.exhaustive.statement
-SwitchErrors.java:127:9: compiler.err.not.exhaustive.statement
+SwitchErrors.java:121:9: compiler.err.not.exhaustive.statement
-SwitchErrors.java:187:9: compiler.err.not.exhaustive.statement
+SwitchErrors.java:128:9: compiler.err.not.exhaustive.statement
+SwitchErrors.java:188:9: compiler.err.not.exhaustive.statement
 - compiler.note.preview.filename: SwitchErrors.java, DEFAULT
 - compiler.note.preview.recompile
-43 errors
+44 errors

test/langtools/tools/javac/patterns/Switches.java

@@ -27,7 +27,7 @@ import java.util.function.Function;
 
 /*
  * @test
- * @bug 8262891 8268333
+ * @bug 8262891 8268333 8268896
  * @summary Check behavior of pattern switches.
  * @compile --enable-preview -source ${jdk.version} Switches.java
  * @run main/othervm --enable-preview Switches
@@ -60,6 +60,8 @@ public class Switches {
         runEnumTest(this::testIntegerWithGuardsExpression1);
         runStringWithConstant(this::testStringWithConstant);
         runStringWithConstant(this::testStringWithConstantExpression);
+        runFallThrough(this::testFallThroughStatement);
+        runFallThrough(this::testFallThroughExpression);
         npeTest(this::npeTestStatement);
         npeTest(this::npeTestExpression);
         exhaustiveStatementSane("");
@@ -104,6 +106,10 @@ public class Switches {
         assertEquals(-1, mapper.apply(null));
     }
 
+    void runFallThrough(Function<Integer, Integer> mapper) {
+        assertEquals(2, mapper.apply(1));
+    }
+
     void npeTest(Consumer<I> testCase) {
         try {
             testCase.accept(null);
@@ -272,7 +278,7 @@ public class Switches {
     String testStringWithGuards1(E e) {
         switch (e != null ? e.name() : null) {
             case "A": return "a";
-            case "B": return "b";
+            case Switches.ConstantClassClash: return "b";
             case String x && "C".equals(x): return "C";
             case "C": return "broken";
             case null, String x: return String.valueOf(x);
@@ -282,7 +288,7 @@ public class Switches {
     String testStringWithGuardsExpression1(E e) {
         return switch (e != null ? e.name() : null) {
             case "A" -> "a";
-            case "B" -> "b";
+            case ConstantClassClash -> "b";
             case String x && "C".equals(x) -> "C";
             case "C" -> "broken";
             case null, String x -> String.valueOf(x);
@@ -309,6 +315,31 @@ public class Switches {
         };
     }
 
+    Integer testFallThroughStatement(Integer i) {
+        int r = 0;
+
+        switch (i) {
+            case Integer o && o != null:
+                r = 1;
+            default:
+                r = 2;
+        }
+
+        return r;
+    }
+
+    Integer testFallThroughExpression(Integer i) {
+        int r = switch (i) {
+            case Integer o && o != null:
+                r = 1;
+            default:
+                r = 2;
+                yield r;
+        };
+
+        return r;
+    }
+
     void npeTestStatement(I i) {
         switch (i) {
             case A a -> {}
@@ -335,6 +366,12 @@ public class Switches {
         }
     }
 
+    //verify that for cases like:
+    //case ConstantClassClash ->
+    //ConstantClassClash is interpreted as a field, not as a class
+    private static final String ConstantClassClash = "B";
+    private static class ConstantClassClash {}
+
     sealed interface I {}
     final class A implements I {}
     final class B implements I {}