Merge jdk

Merge jdk-26+1

Author: David Simms

.jcheck/conf

@@ -1,7 +1,7 @@
 [general]
 project=valhalla
 jbs=JDK
-version=25
+version=26
 
 [checks]
 error=author,committer,executable,symlink,whitespace

make/conf/version-numbers.conf

@@ -26,17 +26,17 @@
 # Default version, product, and vendor information to use,
 # unless overridden by configure
 
-DEFAULT_VERSION_FEATURE=25
+DEFAULT_VERSION_FEATURE=26
 DEFAULT_VERSION_INTERIM=0
 DEFAULT_VERSION_UPDATE=0
 DEFAULT_VERSION_PATCH=0
 DEFAULT_VERSION_EXTRA1=0
 DEFAULT_VERSION_EXTRA2=0
 DEFAULT_VERSION_EXTRA3=0
-DEFAULT_VERSION_DATE=2025-09-16
-DEFAULT_VERSION_CLASSFILE_MAJOR=69  # "`$EXPR $DEFAULT_VERSION_FEATURE + 44`"
+DEFAULT_VERSION_DATE=2026-03-17
+DEFAULT_VERSION_CLASSFILE_MAJOR=70  # "`$EXPR $DEFAULT_VERSION_FEATURE + 44`"
 DEFAULT_VERSION_CLASSFILE_MINOR=0
 DEFAULT_VERSION_DOCS_API_SINCE=11
-DEFAULT_ACCEPTABLE_BOOT_VERSIONS="24 25"
-DEFAULT_JDK_SOURCE_TARGET_VERSION=25
-DEFAULT_PROMOTED_VERSION_PRE=lworld5ea
+DEFAULT_ACCEPTABLE_BOOT_VERSIONS="24 25 26"
+DEFAULT_JDK_SOURCE_TARGET_VERSION=26
+DEFAULT_PROMOTED_VERSION_PRE=lworldea2

src/hotspot/share/c1/c1_Runtime1.cpp

@@ -963,7 +963,7 @@ JRT_ENTRY(void, Runtime1::deoptimize(JavaThread* current, jint trap_request))
   Deoptimization::DeoptReason reason = Deoptimization::trap_request_reason(trap_request);
 
   if (action == Deoptimization::Action_make_not_entrant) {
-    if (nm->make_not_entrant("C1 deoptimize")) {
+    if (nm->make_not_entrant(nmethod::ChangeReason::C1_deoptimize)) {
       if (reason == Deoptimization::Reason_tenured) {
         MethodData* trap_mdo = Deoptimization::get_method_data(current, method, true /*create_if_missing*/);
         if (trap_mdo != nullptr) {
@@ -1290,7 +1290,7 @@ JRT_ENTRY(void, Runtime1::patch_code(JavaThread* current, C1StubId stub_id ))
     // safepoint, but if it's still alive then make it not_entrant.
     nmethod* nm = CodeCache::find_nmethod(caller_frame.pc());
     if (nm != nullptr) {
-      nm->make_not_entrant("C1 code patch");
+      nm->make_not_entrant(nmethod::ChangeReason::C1_codepatch);
     }
 
     Deoptimization::deoptimize_frame(current, caller_frame.id());
@@ -1538,7 +1538,7 @@ void Runtime1::patch_code(JavaThread* current, C1StubId stub_id) {
     // Make sure the nmethod is invalidated, i.e. made not entrant.
     nmethod* nm = CodeCache::find_nmethod(caller_frame.pc());
     if (nm != nullptr) {
-      nm->make_not_entrant("C1 deoptimize for patching");
+      nm->make_not_entrant(nmethod::ChangeReason::C1_deoptimize_for_patching);
     }
   }
 
@@ -1666,7 +1666,7 @@ JRT_ENTRY(void, Runtime1::predicate_failed_trap(JavaThread* current))
 
   nmethod* nm = CodeCache::find_nmethod(caller_frame.pc());
   assert (nm != nullptr, "no more nmethod?");
-  nm->make_not_entrant("C1 predicate failed trap");
+  nm->make_not_entrant(nmethod::ChangeReason::C1_predicate_failed_trap);
 
   methodHandle m(current, nm->method());
   MethodData* mdo = m->method_data();

src/hotspot/share/ci/ciReplay.cpp

@@ -803,7 +803,7 @@ class CompileReplay : public StackObj {
     // Make sure the existence of a prior compile doesn't stop this one
     nmethod* nm = (entry_bci != InvocationEntryBci) ? method->lookup_osr_nmethod_for(entry_bci, comp_level, true) : method->code();
     if (nm != nullptr) {
-      nm->make_not_entrant("CI replay");
+      nm->make_not_entrant(nmethod::ChangeReason::CI_replay);
     }
     replay_state = this;
     CompileBroker::compile_method(methodHandle(THREAD, method), entry_bci, comp_level,

src/hotspot/share/classfile/classFileParser.cpp

@@ -154,12 +154,14 @@
 
 #define JAVA_23_VERSION                   67
 
-#define CONSTANT_CLASS_DESCRIPTORS        69
-
 #define JAVA_24_VERSION                   68
 
 #define JAVA_25_VERSION                   69
 
+#define JAVA_26_VERSION                   70
+
+#define CONSTANT_CLASS_DESCRIPTORS        70
+
 void ClassFileParser::set_class_bad_constant_seen(short bad_constant) {
   assert((bad_constant == JVM_CONSTANT_Module ||
           bad_constant == JVM_CONSTANT_Package) && _major_version >= JAVA_9_VERSION,
@@ -4135,9 +4137,9 @@ void ClassFileParser::set_precomputed_flags(InstanceKlass* ik) {
 }
 
 bool ClassFileParser::supports_inline_types() const {
-  // Inline types are only supported by class file version 69.65535 and later
-  return _major_version > JAVA_25_VERSION ||
-         (_major_version == JAVA_25_VERSION && _minor_version == JAVA_PREVIEW_MINOR_VERSION);
+  // Inline types are only supported by class file version 70.65535 and later
+  return _major_version > JAVA_26_VERSION ||
+         (_major_version == JAVA_26_VERSION && _minor_version == JAVA_PREVIEW_MINOR_VERSION);
 }
 
 // utility methods for appending an array with check for duplicates

src/hotspot/share/classfile/verifier.hpp

@@ -48,7 +48,7 @@ class Verifier : AllStatic {
     INVOKEDYNAMIC_MAJOR_VERSION         = 51,
     NO_RELAX_ACCESS_CTRL_CHECK_VERSION  = 52,
     DYNAMICCONSTANT_MAJOR_VERSION       = 55,
-    VALUE_TYPES_MAJOR_VERSION           = 67,
+    VALUE_TYPES_MAJOR_VERSION           = 70,
     JAVA_PREVIEW_MINOR_VERSION          = 65535,
   };
 

src/hotspot/share/code/codeCache.cpp

@@ -1361,7 +1361,7 @@ void CodeCache::make_marked_nmethods_deoptimized() {
   while(iter.next()) {
     nmethod* nm = iter.method();
     if (nm->is_marked_for_deoptimization() && !nm->has_been_deoptimized() && nm->can_be_deoptimized()) {
-      nm->make_not_entrant("marked for deoptimization");
+      nm->make_not_entrant(nmethod::ChangeReason::marked_for_deoptimization);
       nm->make_deoptimized();
     }
   }

src/hotspot/share/code/nmethod.cpp

@@ -1994,14 +1994,12 @@ void nmethod::invalidate_osr_method() {
   }
 }
 
-void nmethod::log_state_change(const char* reason) const {
-  assert(reason != nullptr, "Must provide a reason");
-
+void nmethod::log_state_change(ChangeReason change_reason) const {
   if (LogCompilation) {
     if (xtty != nullptr) {
       ttyLocker ttyl;  // keep the following output all in one block
       xtty->begin_elem("make_not_entrant thread='%zu' reason='%s'",
-                       os::current_thread_id(), reason);
+                       os::current_thread_id(), change_reason_to_string(change_reason));
       log_identity(xtty);
       xtty->stamp();
       xtty->end_elem();
@@ -2010,7 +2008,7 @@ void nmethod::log_state_change(const char* reason) const {
 
   ResourceMark rm;
   stringStream ss(NEW_RESOURCE_ARRAY(char, 256), 256);
-  ss.print("made not entrant: %s", reason);
+  ss.print("made not entrant: %s", change_reason_to_string(change_reason));
 
   CompileTask::print_ul(this, ss.freeze());
   if (PrintCompilation) {
@@ -2025,9 +2023,7 @@ void nmethod::unlink_from_method() {
 }
 
 // Invalidate code
-bool nmethod::make_not_entrant(const char* reason) {
-  assert(reason != nullptr, "Must provide a reason");
-
+bool nmethod::make_not_entrant(ChangeReason change_reason) {
   // This can be called while the system is already at a safepoint which is ok
   NoSafepointVerifier nsv;
 
@@ -2096,7 +2092,7 @@ bool nmethod::make_not_entrant(const char* reason) {
     assert(success, "Transition can't fail");
 
     // Log the transition once
-    log_state_change(reason);
+    log_state_change(change_reason);
 
     // Remove nmethod from method.
     unlink_from_method();

src/hotspot/share/code/nmethod.hpp

@@ -476,6 +476,85 @@ class nmethod : public CodeBlob {
   void oops_do_set_strong_done(nmethod* old_head);
 
 public:
+  enum class ChangeReason : u1 {
+    C1_codepatch,
+    C1_deoptimize,
+    C1_deoptimize_for_patching,
+    C1_predicate_failed_trap,
+    CI_replay,
+    JVMCI_invalidate_nmethod,
+    JVMCI_invalidate_nmethod_mirror,
+    JVMCI_materialize_virtual_object,
+    JVMCI_new_installation,
+    JVMCI_register_method,
+    JVMCI_replacing_with_new_code,
+    JVMCI_reprofile,
+    marked_for_deoptimization,
+    missing_exception_handler,
+    not_used,
+    OSR_invalidation_back_branch,
+    OSR_invalidation_for_compiling_with_C1,
+    OSR_invalidation_of_lower_level,
+    set_native_function,
+    uncommon_trap,
+    whitebox_deoptimization,
+    zombie,
+  };
+
+
+  static const char* change_reason_to_string(ChangeReason change_reason) {
+    switch (change_reason) {
+      case ChangeReason::C1_codepatch:
+        return "C1 code patch";
+      case ChangeReason::C1_deoptimize:
+        return "C1 deoptimized";
+      case ChangeReason::C1_deoptimize_for_patching:
+        return "C1 deoptimize for patching";
+      case ChangeReason::C1_predicate_failed_trap:
+        return "C1 predicate failed trap";
+      case ChangeReason::CI_replay:
+        return "CI replay";
+      case ChangeReason::JVMCI_invalidate_nmethod:
+        return "JVMCI invalidate nmethod";
+      case ChangeReason::JVMCI_invalidate_nmethod_mirror:
+        return "JVMCI invalidate nmethod mirror";
+      case ChangeReason::JVMCI_materialize_virtual_object:
+        return "JVMCI materialize virtual object";
+      case ChangeReason::JVMCI_new_installation:
+        return "JVMCI new installation";
+      case ChangeReason::JVMCI_register_method:
+        return "JVMCI register method";
+      case ChangeReason::JVMCI_replacing_with_new_code:
+        return "JVMCI replacing with new code";
+      case ChangeReason::JVMCI_reprofile:
+        return "JVMCI reprofile";
+      case ChangeReason::marked_for_deoptimization:
+        return "marked for deoptimization";
+      case ChangeReason::missing_exception_handler:
+        return "missing exception handler";
+      case ChangeReason::not_used:
+        return "not used";
+      case ChangeReason::OSR_invalidation_back_branch:
+        return "OSR invalidation back branch";
+      case ChangeReason::OSR_invalidation_for_compiling_with_C1:
+        return "OSR invalidation for compiling with C1";
+      case ChangeReason::OSR_invalidation_of_lower_level:
+        return "OSR invalidation of lower level";
+      case ChangeReason::set_native_function:
+        return "set native function";
+      case ChangeReason::uncommon_trap:
+        return "uncommon trap";
+      case ChangeReason::whitebox_deoptimization:
+        return "whitebox deoptimization";
+      case ChangeReason::zombie:
+        return "zombie";
+      default: {
+        assert(false, "Unhandled reason");
+        return "Unknown";
+      }
+    }
+  }
+
   // create nmethod with entry_bci
   static nmethod* new_nmethod(const methodHandle& method,
                               int compile_id,
@@ -641,8 +720,8 @@ class nmethod : public CodeBlob {
   // alive.  It is used when an uncommon trap happens.  Returns true
   // if this thread changed the state of the nmethod or false if
   // another thread performed the transition.
-  bool  make_not_entrant(const char* reason);
-  bool  make_not_used()    { return make_not_entrant("not used"); }
+  bool  make_not_entrant(ChangeReason change_reason);
+  bool  make_not_used() { return make_not_entrant(ChangeReason::not_used); }
 
   bool  is_marked_for_deoptimization() const { return deoptimization_status() != not_marked; }
   bool  has_been_deoptimized() const { return deoptimization_status() == deoptimize_done; }
@@ -965,7 +1044,7 @@ class nmethod : public CodeBlob {
   // Logging
   void log_identity(xmlStream* log) const;
   void log_new_nmethod() const;
-  void log_state_change(const char* reason) const;
+  void log_state_change(ChangeReason change_reason) const;
 
   // Prints block-level comments, including nmethod specific block labels:
   void print_nmethod_labels(outputStream* stream, address block_begin, bool print_section_labels=true) const;

src/hotspot/share/compiler/compilationPolicy.cpp

@@ -924,7 +924,7 @@ void CompilationPolicy::compile(const methodHandle& mh, int bci, CompLevel level
         nmethod* osr_nm = mh->lookup_osr_nmethod_for(bci, CompLevel_simple, false);
         if (osr_nm != nullptr && osr_nm->comp_level() > CompLevel_simple) {
           // Invalidate the existing OSR nmethod so that a compile at CompLevel_simple is permitted.
-          osr_nm->make_not_entrant("OSR invalidation for compiling with C1");
+          osr_nm->make_not_entrant(nmethod::ChangeReason::OSR_invalidation_for_compiling_with_C1);
         }
         compile(mh, bci, CompLevel_simple, THREAD);
       }
@@ -1516,7 +1516,7 @@ void CompilationPolicy::method_back_branch_event(const methodHandle& mh, const m
               int osr_bci = nm->is_osr_method() ? nm->osr_entry_bci() : InvocationEntryBci;
               print_event(MAKE_NOT_ENTRANT, mh(), mh(), osr_bci, level);
             }
-            nm->make_not_entrant("OSR invalidation, back branch");
+            nm->make_not_entrant(nmethod::ChangeReason::OSR_invalidation_back_branch);
           }
         }
         // Fix up next_level if necessary to avoid deopts