Merge tag 'jdk-23.0.1+11' into sapmachine23

Author: RealCLanger

.jcheck/conf

@@ -1,7 +1,7 @@
 [general]
-project=jdk
+project=jdk-updates
 jbs=JDK
-version=23
+version=23.0.1
 
 [checks]
 error=author,committer,reviewers,merge,issues,executable,symlink,message,hg-tag,whitespace,problemlists

make/conf/version-numbers.conf

@@ -28,12 +28,12 @@
 
 DEFAULT_VERSION_FEATURE=23
 DEFAULT_VERSION_INTERIM=0
-DEFAULT_VERSION_UPDATE=0
+DEFAULT_VERSION_UPDATE=1
 DEFAULT_VERSION_PATCH=0
 DEFAULT_VERSION_EXTRA1=0
 DEFAULT_VERSION_EXTRA2=0
 DEFAULT_VERSION_EXTRA3=0
-DEFAULT_VERSION_DATE=2024-09-17
+DEFAULT_VERSION_DATE=2024-10-15
 DEFAULT_VERSION_CLASSFILE_MAJOR=67  # "`$EXPR $DEFAULT_VERSION_FEATURE + 44`"
 DEFAULT_VERSION_CLASSFILE_MINOR=0
 DEFAULT_VERSION_DOCS_API_SINCE=11

src/hotspot/cpu/riscv/assembler_riscv.hpp

@@ -1828,10 +1828,12 @@ enum Nf {
   // Vector unordered indexed load instructions
   INSN( vluxei8_v, 0b0000111, 0b000, 0b01, 0b0);
   INSN(vluxei32_v, 0b0000111, 0b110, 0b01, 0b0);
+  INSN(vluxei64_v, 0b0000111, 0b111, 0b01, 0b0);
 
   // Vector unordered indexed store instructions
   INSN( vsuxei8_v, 0b0100111, 0b000, 0b01, 0b0);
   INSN(vsuxei32_v, 0b0100111, 0b110, 0b01, 0b0);
+  INSN(vsuxei64_v, 0b0100111, 0b111, 0b01, 0b0);
 
 #undef INSN
 

src/hotspot/cpu/riscv/riscv_v.ad

@@ -4795,12 +4795,11 @@ instruct vcountTrailingZeros(vReg dst, vReg src) %{
 
 // ------------------------------ Vector Load Gather ---------------------------
 
-instruct gather_load(vReg dst, indirect mem, vReg idx) %{
-  predicate(type2aelembytes(Matcher::vector_element_basic_type(n)) == 4 ||
-            type2aelembytes(Matcher::vector_element_basic_type(n)) == 8);
+instruct gather_loadS(vReg dst, indirect mem, vReg idx) %{
+  predicate(type2aelembytes(Matcher::vector_element_basic_type(n)) == 4);
   match(Set dst (LoadVectorGather mem idx));
   effect(TEMP_DEF dst);
-  format %{ "gather_load $dst, $mem, $idx" %}
+  format %{ "gather_loadS $dst, $mem, $idx" %}
   ins_encode %{
     __ vmv1r_v(as_VectorRegister($dst$$reg), as_VectorRegister($idx$$reg));
     BasicType bt = Matcher::vector_element_basic_type(this);
@@ -4813,12 +4812,28 @@ instruct gather_load(vReg dst, indirect mem, vReg idx) %{
   ins_pipe(pipe_slow);
 %}
 
-instruct gather_load_masked(vReg dst, indirect mem, vReg idx, vRegMask_V0 v0, vReg tmp) %{
-  predicate(type2aelembytes(Matcher::vector_element_basic_type(n)) == 4 ||
-            type2aelembytes(Matcher::vector_element_basic_type(n)) == 8);
+instruct gather_loadD(vReg dst, indirect mem, vReg idx) %{
+  predicate(type2aelembytes(Matcher::vector_element_basic_type(n)) == 8);
+  match(Set dst (LoadVectorGather mem idx));
+  effect(TEMP_DEF dst);
+  format %{ "gather_loadD $dst, $mem, $idx" %}
+  ins_encode %{
+    BasicType bt = Matcher::vector_element_basic_type(this);
+    Assembler::SEW sew = Assembler::elemtype_to_sew(bt);
+    __ vsetvli_helper(bt, Matcher::vector_length(this));
+    __ vzext_vf2(as_VectorRegister($dst$$reg), as_VectorRegister($idx$$reg));
+    __ vsll_vi(as_VectorRegister($dst$$reg), as_VectorRegister($dst$$reg), (int)sew);
+    __ vluxei64_v(as_VectorRegister($dst$$reg), as_Register($mem$$base),
+                  as_VectorRegister($dst$$reg));
+ %}
+  ins_pipe(pipe_slow);
+%}
+
+instruct gather_loadS_masked(vReg dst, indirect mem, vReg idx, vRegMask_V0 v0, vReg tmp) %{
+  predicate(type2aelembytes(Matcher::vector_element_basic_type(n)) == 4);
   match(Set dst (LoadVectorGatherMasked mem (Binary idx v0)));
   effect(TEMP_DEF dst, TEMP tmp);
-  format %{ "gather_load_masked $dst, $mem, $idx, $v0\t# KILL $tmp" %}
+  format %{ "gather_loadS_masked $dst, $mem, $idx, $v0\t# KILL $tmp" %}
   ins_encode %{
     __ vmv1r_v(as_VectorRegister($tmp$$reg), as_VectorRegister($idx$$reg));
     BasicType bt = Matcher::vector_element_basic_type(this);
@@ -4833,14 +4848,32 @@ instruct gather_load_masked(vReg dst, indirect mem, vReg idx, vRegMask_V0 v0, vR
   ins_pipe(pipe_slow);
 %}
 
+instruct gather_loadD_masked(vReg dst, indirect mem, vReg idx, vRegMask_V0 v0, vReg tmp) %{
+  predicate(type2aelembytes(Matcher::vector_element_basic_type(n)) == 8);
+  match(Set dst (LoadVectorGatherMasked mem (Binary idx v0)));
+  effect(TEMP_DEF dst, TEMP tmp);
+  format %{ "gather_loadD_masked $dst, $mem, $idx, $v0\t# KILL $tmp" %}
+  ins_encode %{
+    BasicType bt = Matcher::vector_element_basic_type(this);
+    Assembler::SEW sew = Assembler::elemtype_to_sew(bt);
+    __ vsetvli_helper(bt, Matcher::vector_length(this));
+    __ vzext_vf2(as_VectorRegister($tmp$$reg), as_VectorRegister($idx$$reg));
+    __ vsll_vi(as_VectorRegister($tmp$$reg), as_VectorRegister($tmp$$reg), (int)sew);
+    __ vxor_vv(as_VectorRegister($dst$$reg), as_VectorRegister($dst$$reg),
+               as_VectorRegister($dst$$reg));
+    __ vluxei64_v(as_VectorRegister($dst$$reg), as_Register($mem$$base),
+                  as_VectorRegister($tmp$$reg), Assembler::v0_t);
+ %}
+  ins_pipe(pipe_slow);
+%}
+
 // ------------------------------ Vector Store Scatter -------------------------
 
-instruct scatter_store(indirect mem, vReg src, vReg idx, vReg tmp) %{
-  predicate(type2aelembytes(Matcher::vector_element_basic_type(n->in(3)->in(1))) == 4 ||
-            type2aelembytes(Matcher::vector_element_basic_type(n->in(3)->in(1))) == 8);
+instruct scatter_storeS(indirect mem, vReg src, vReg idx, vReg tmp) %{
+  predicate(type2aelembytes(Matcher::vector_element_basic_type(n->in(3)->in(1))) == 4);
   match(Set mem (StoreVectorScatter mem (Binary src idx)));
   effect(TEMP tmp);
-  format %{ "scatter_store $mem, $idx, $src\t# KILL $tmp" %}
+  format %{ "scatter_storeS $mem, $idx, $src\t# KILL $tmp" %}
   ins_encode %{
     __ vmv1r_v(as_VectorRegister($tmp$$reg), as_VectorRegister($idx$$reg));
     BasicType bt = Matcher::vector_element_basic_type(this, $src);
@@ -4853,12 +4886,28 @@ instruct scatter_store(indirect mem, vReg src, vReg idx, vReg tmp) %{
   ins_pipe(pipe_slow);
 %}
 
-instruct scatter_store_masked(indirect mem, vReg src, vReg idx, vRegMask_V0 v0, vReg tmp) %{
-  predicate(type2aelembytes(Matcher::vector_element_basic_type(n->in(3)->in(1))) == 4 ||
-            type2aelembytes(Matcher::vector_element_basic_type(n->in(3)->in(1))) == 8);
+instruct scatter_storeD(indirect mem, vReg src, vReg idx, vReg tmp) %{
+  predicate(type2aelembytes(Matcher::vector_element_basic_type(n->in(3)->in(1))) == 8);
+  match(Set mem (StoreVectorScatter mem (Binary src idx)));
+  effect(TEMP tmp);
+  format %{ "scatter_storeD $mem, $idx, $src\t# KILL $tmp" %}
+  ins_encode %{
+    BasicType bt = Matcher::vector_element_basic_type(this, $src);
+    Assembler::SEW sew = Assembler::elemtype_to_sew(bt);
+    __ vsetvli_helper(bt, Matcher::vector_length(this, $src));
+    __ vzext_vf2(as_VectorRegister($tmp$$reg), as_VectorRegister($idx$$reg));
+    __ vsll_vi(as_VectorRegister($tmp$$reg), as_VectorRegister($tmp$$reg), (int)sew);
+    __ vsuxei64_v(as_VectorRegister($src$$reg), as_Register($mem$$base),
+                  as_VectorRegister($tmp$$reg));
+  %}
+  ins_pipe(pipe_slow);
+%}
+
+instruct scatter_storeS_masked(indirect mem, vReg src, vReg idx, vRegMask_V0 v0, vReg tmp) %{
+  predicate(type2aelembytes(Matcher::vector_element_basic_type(n->in(3)->in(1))) == 4);
   match(Set mem (StoreVectorScatterMasked mem (Binary src (Binary idx v0))));
   effect(TEMP tmp);
-  format %{ "scatter_store_masked $mem, $idx, $src, $v0\t# KILL $tmp" %}
+  format %{ "scatter_storeS_masked $mem, $idx, $src, $v0\t# KILL $tmp" %}
   ins_encode %{
     __ vmv1r_v(as_VectorRegister($tmp$$reg), as_VectorRegister($idx$$reg));
     BasicType bt = Matcher::vector_element_basic_type(this, $src);
@@ -4871,6 +4920,23 @@ instruct scatter_store_masked(indirect mem, vReg src, vReg idx, vRegMask_V0 v0,
   ins_pipe(pipe_slow);
 %}
 
+instruct scatter_storeD_masked(indirect mem, vReg src, vReg idx, vRegMask_V0 v0, vReg tmp) %{
+  predicate(type2aelembytes(Matcher::vector_element_basic_type(n->in(3)->in(1))) == 8);
+  match(Set mem (StoreVectorScatterMasked mem (Binary src (Binary idx v0))));
+  effect(TEMP tmp);
+  format %{ "scatter_storeD_masked $mem, $idx, $src, $v0\t# KILL $tmp" %}
+  ins_encode %{
+    BasicType bt = Matcher::vector_element_basic_type(this, $src);
+    Assembler::SEW sew = Assembler::elemtype_to_sew(bt);
+    __ vsetvli_helper(bt, Matcher::vector_length(this, $src));
+    __ vzext_vf2(as_VectorRegister($tmp$$reg), as_VectorRegister($idx$$reg));
+    __ vsll_vi(as_VectorRegister($tmp$$reg), as_VectorRegister($tmp$$reg), (int)sew);
+    __ vsuxei64_v(as_VectorRegister($src$$reg), as_Register($mem$$base),
+                  as_VectorRegister($tmp$$reg), Assembler::v0_t);
+  %}
+  ins_pipe(pipe_slow);
+%}
+
 // ------------------------------ Populate Index to a Vector -------------------
 
 instruct populateindex(vReg dst, iRegIorL2I src1, iRegIorL2I src2, vReg tmp) %{

src/hotspot/share/cds/archiveHeapLoader.cpp

@@ -34,6 +34,7 @@
 #include "memory/iterator.inline.hpp"
 #include "memory/resourceArea.hpp"
 #include "memory/universe.hpp"
+#include "sanitizers/ub.hpp"
 #include "utilities/bitMap.inline.hpp"
 #include "utilities/copy.hpp"
 
@@ -61,6 +62,7 @@ ptrdiff_t ArchiveHeapLoader::_mapped_heap_delta = 0;
 
 // Every mapped region is offset by _mapped_heap_delta from its requested address.
 // See FileMapInfo::heap_region_requested_address().
+ATTRIBUTE_NO_UBSAN
 void ArchiveHeapLoader::init_mapped_heap_info(address mapped_heap_bottom, ptrdiff_t delta, int dumptime_oop_shift) {
   assert(!_mapped_heap_relocation_initialized, "only once");
   if (!UseCompressedOops) {

src/hotspot/share/classfile/verifier.cpp

@@ -32,6 +32,7 @@
 #include "classfile/stackMapTableFormat.hpp"
 #include "classfile/symbolTable.hpp"
 #include "classfile/systemDictionary.hpp"
+#include "classfile/systemDictionaryShared.hpp"
 #include "classfile/verifier.hpp"
 #include "classfile/vmClasses.hpp"
 #include "classfile/vmSymbols.hpp"
@@ -212,6 +213,11 @@ bool Verifier::verify(InstanceKlass* klass, bool should_verify_class, TRAPS) {
          exception_name == vmSymbols::java_lang_ClassFormatError())) {
       log_info(verification)("Fail over class verification to old verifier for: %s", klass->external_name());
       log_info(class, init)("Fail over class verification to old verifier for: %s", klass->external_name());
+      // Exclude any classes that fail over during dynamic dumping
+      if (CDSConfig::is_dumping_dynamic_archive()) {
+        SystemDictionaryShared::warn_excluded(klass, "Failed over class verification while dynamic dumping");
+        SystemDictionaryShared::set_excluded(klass);
+      }
       message_buffer = NEW_RESOURCE_ARRAY(char, message_buffer_len);
       exception_message = message_buffer;
       exception_name = inference_verify(

src/hotspot/share/gc/shenandoah/shenandoahBarrierSetNMethod.cpp

@@ -36,13 +36,19 @@
 #include "runtime/threadWXSetters.inline.hpp"
 
 bool ShenandoahBarrierSetNMethod::nmethod_entry_barrier(nmethod* nm) {
+  if (!is_armed(nm)) {
+    // Some other thread got here first and healed the oops
+    // and disarmed the nmethod. No need to continue.
+    return true;
+  }
+
   ShenandoahReentrantLock* lock = ShenandoahNMethod::lock_for_nmethod(nm);
   assert(lock != nullptr, "Must be");
   ShenandoahReentrantLocker locker(lock);
 
   if (!is_armed(nm)) {
-    // Some other thread got here first and healed the oops
-    // and disarmed the nmethod.
+    // Some other thread managed to complete while we were
+    // waiting for lock. No need to continue.
     return true;
   }
 

src/hotspot/share/gc/shenandoah/shenandoahLock.cpp

@@ -32,40 +32,49 @@
 #include "runtime/javaThread.hpp"
 #include "runtime/os.inline.hpp"
 
-// These are inline variants of Thread::SpinAcquire with optional blocking in VM.
-
-class ShenandoahNoBlockOp : public StackObj {
-public:
-  ShenandoahNoBlockOp(JavaThread* java_thread) {
-    assert(java_thread == nullptr, "Should not pass anything");
-  }
-};
-
 void ShenandoahLock::contended_lock(bool allow_block_for_safepoint) {
   Thread* thread = Thread::current();
   if (allow_block_for_safepoint && thread->is_Java_thread()) {
-    contended_lock_internal<ThreadBlockInVM>(JavaThread::cast(thread));
+    contended_lock_internal<true>(JavaThread::cast(thread));
   } else {
-    contended_lock_internal<ShenandoahNoBlockOp>(nullptr);
+    contended_lock_internal<false>(nullptr);
   }
 }
 
-template<typename BlockOp>
+template<bool ALLOW_BLOCK>
 void ShenandoahLock::contended_lock_internal(JavaThread* java_thread) {
-  int ctr = 0;
-  int yields = 0;
+  assert(!ALLOW_BLOCK || java_thread != nullptr, "Must have a Java thread when allowing block.");
+  // Spin this much on multi-processor, do not spin on multi-processor.
+  int ctr = os::is_MP() ? 0xFF : 0;
+  // Apply TTAS to avoid more expensive CAS calls if the lock is still held by other thread.
   while (Atomic::load(&_state) == locked ||
          Atomic::cmpxchg(&_state, unlocked, locked) != unlocked) {
-    if ((++ctr & 0xFFF) == 0) {
-      BlockOp block(java_thread);
-      if (yields > 5) {
-        os::naked_short_sleep(1);
+    if (ctr > 0 && !SafepointSynchronize::is_synchronizing()) {
+      // Lightly contended, spin a little if no safepoint is pending.
+      SpinPause();
+      ctr--;
+    } else if (ALLOW_BLOCK) {
+      ThreadBlockInVM block(java_thread);
+      if (SafepointSynchronize::is_synchronizing()) {
+        // If safepoint is pending, we want to block and allow safepoint to proceed.
+        // Normally, TBIVM above would block us in its destructor.
+        //
+        // But that blocking only happens when TBIVM knows the thread poll is armed.
+        // There is a window between announcing a safepoint and arming the thread poll
+        // during which trying to continuously enter TBIVM is counter-productive.
+        // Under high contention, we may end up going in circles thousands of times.
+        // To avoid it, we wait here until local poll is armed and then proceed
+        // to TBVIM exit for blocking. We do not SpinPause, but yield to let
+        // VM thread to arm the poll sooner.
+        while (SafepointSynchronize::is_synchronizing() &&
+               !SafepointMechanism::local_poll_armed(java_thread)) {
+          os::naked_yield();
+        }
       } else {
         os::naked_yield();
-        yields++;
       }
     } else {
-      SpinPause();
+      os::naked_yield();
     }
   }
 }

src/hotspot/share/gc/shenandoah/shenandoahLock.hpp

@@ -37,20 +37,22 @@ class ShenandoahLock  {
   shenandoah_padding(0);
   volatile LockState _state;
   shenandoah_padding(1);
-  volatile Thread* _owner;
+  Thread* volatile _owner;
   shenandoah_padding(2);
 
-  template<typename BlockOp>
+  template<bool ALLOW_BLOCK>
   void contended_lock_internal(JavaThread* java_thread);
-
 public:
   ShenandoahLock() : _state(unlocked), _owner(nullptr) {};
 
   void lock(bool allow_block_for_safepoint) {
     assert(Atomic::load(&_owner) != Thread::current(), "reentrant locking attempt, would deadlock");
 
-    // Try to lock fast, or dive into contended lock handling.
-    if (Atomic::cmpxchg(&_state, unlocked, locked) != unlocked) {
+    if ((allow_block_for_safepoint && SafepointSynchronize::is_synchronizing()) ||
+        (Atomic::cmpxchg(&_state, unlocked, locked) != unlocked)) {
+      // 1. Java thread, and there is a pending safepoint. Dive into contended locking
+      //    immediately without trying anything else, and block.
+      // 2. Fast lock fails, dive into contended lock handling.
       contended_lock(allow_block_for_safepoint);
     }