Merge to tag jdk-11.0.31+1

.jcheck/conf

@@ -1,7 +1,7 @@
 [general]
 project=jdk-updates
 jbs=JDK
-version=11.0.30
+version=11.0.31
 
 [checks]
 error=author,committer,reviewers,merge,issues,executable,symlink,message,hg-tag,whitespace,problemlists

make/autoconf/version-numbers

@@ -28,16 +28,16 @@
 
 DEFAULT_VERSION_FEATURE=11
 DEFAULT_VERSION_INTERIM=0
-DEFAULT_VERSION_UPDATE=30
+DEFAULT_VERSION_UPDATE=31
 DEFAULT_VERSION_PATCH=0
 DEFAULT_VERSION_EXTRA1=0
 DEFAULT_VERSION_EXTRA2=0
 DEFAULT_VERSION_EXTRA3=0
-DEFAULT_VERSION_DATE=2026-01-20
+DEFAULT_VERSION_DATE=2026-04-21
 DEFAULT_VERSION_CLASSFILE_MAJOR=55  # "`$EXPR $DEFAULT_VERSION_FEATURE + 44`"
 DEFAULT_VERSION_CLASSFILE_MINOR=0
 DEFAULT_ACCEPTABLE_BOOT_VERSIONS="10 11"
-DEFAULT_PROMOTED_VERSION_PRE=
+DEFAULT_PROMOTED_VERSION_PRE=ea
 
 LAUNCHER_NAME=openjdk
 PRODUCT_NAME=OpenJDK

src/hotspot/os/linux/os_linux.cpp

@@ -981,6 +981,15 @@ bool os::create_thread(Thread* thread, ThreadType thr_type,
   }
   assert(is_aligned(stack_size, os::vm_page_size()), "stack_size not aligned");
 
+  // Add an additional page to the stack size to reduce its chances of getting large page aligned
+  // so that the stack does not get backed by a transparent huge page.
+  size_t default_large_page_size = os::large_page_size();
+  if (default_large_page_size != 0 &&
+      stack_size >= default_large_page_size &&
+      is_aligned(stack_size, default_large_page_size)) {
+    stack_size += os::vm_page_size();
+  }
+
   int status = pthread_attr_setstacksize(&attr, stack_size);
   assert_status(status == 0, status, "pthread_attr_setstacksize");
 
@@ -4145,6 +4154,10 @@ bool os::Linux::setup_large_page_type(size_t page_size) {
 }
 
 void os::large_page_init() {
+  // Always initialize the default large page size even if large pages are not being used.
+  size_t large_page_size = Linux::setup_large_page_size();
+
+  // Handle the case where we do not want to use huge pages
   if (!UseLargePages &&
       !UseTransparentHugePages &&
       !UseHugeTLBFS &&
@@ -4162,7 +4175,6 @@ void os::large_page_init() {
     return;
   }
 
-  size_t large_page_size = Linux::setup_large_page_size();
   UseLargePages          = Linux::setup_large_page_type(large_page_size);
 
   set_coredump_filter(LARGEPAGES_BIT);

src/hotspot/os_cpu/linux_aarch64/globals_linux_aarch64.hpp

@@ -30,10 +30,18 @@
 // (see globals.hpp)
 
 define_pd_global(bool, DontYieldALot,            false);
-define_pd_global(intx, ThreadStackSize,          2048); // 0 => use system default
-define_pd_global(intx, VMThreadStackSize,        2048);
 
-define_pd_global(intx, CompilerThreadStackSize,  2048);
+// Set default stack sizes < 2MB so as to prevent stacks from getting
+// large-page aligned and backed by THPs on systems where 2MB is the
+// default huge page size. For non-JavaThreads, glibc may add an additional
+// guard page to the total stack size, so to keep the default sizes same
+// for all the following flags, we set them to 2 pages less than 2MB. On
+// systems where 2MB is the default large page size, 4KB is most commonly
+// the regular page size.
+define_pd_global(intx, ThreadStackSize,          2040); // 0 => use system default
+define_pd_global(intx, VMThreadStackSize,        2040);
+
+define_pd_global(intx, CompilerThreadStackSize,  2040);
 
 define_pd_global(uintx,JVMInvokeMethodSlack,     8192);
 

src/hotspot/share/utilities/exceptions.cpp

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 1998, 2018, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1998, 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
@@ -415,6 +415,7 @@ void Exceptions::wrap_dynamic_exception(Thread* THREAD) {
       // Pass through an Error, including BootstrapMethodError, any other form
       // of linkage error, or say ThreadDeath/OutOfMemoryError
       if (TraceMethodHandles) {
+        ResourceMark rm(THREAD);
         tty->print_cr("[constant/invoke]dynamic passes through an Error for " INTPTR_FORMAT, p2i((void *)exception));
         exception->print();
       }
@@ -423,6 +424,7 @@ void Exceptions::wrap_dynamic_exception(Thread* THREAD) {
 
     // Otherwise wrap the exception in a BootstrapMethodError
     if (TraceMethodHandles) {
+      ResourceMark rm(THREAD);
       tty->print_cr("[constant/invoke]dynamic throws BSME for " INTPTR_FORMAT, p2i((void *)exception));
       exception->print();
     }

src/java.base/share/classes/sun/security/ssl/CertificateRequest.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2015, 2020, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2015, 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
@@ -706,13 +706,16 @@ public void consume(ConnectionContext context,
             chc.handshakeProducers.put(SSLHandshake.CERTIFICATE.id,
                     SSLHandshake.CERTIFICATE);
 
-            List<SignatureScheme> sss = new LinkedList<>();
-            for (int id : crm.algorithmIds) {
-                SignatureScheme ss = SignatureScheme.valueOf(id);
-                if (ss != null) {
-                    sss.add(ss);
-                }
+            List<SignatureScheme> sss =
+                    SignatureScheme.getSupportedAlgorithms(
+                            chc.sslConfig,
+                            chc.algorithmConstraints, chc.negotiatedProtocol,
+                            crm.algorithmIds);
+            if (sss == null || sss.isEmpty()) {
+                throw chc.conContext.fatal(Alert.HANDSHAKE_FAILURE,
+                        "No supported signature algorithm");
             }
+
             chc.peerRequestedSignatureSchemes = sss;
             chc.peerRequestedCertSignSchemes = sss;     // use the same schemes
             chc.handshakeSession.setPeerSupportedSignatureAlgorithms(sss);

src/java.base/share/classes/sun/security/ssl/SignatureAlgorithmsExtension.java

@@ -281,6 +281,10 @@ public void consume(ConnectionContext context,
                             shc.sslConfig,
                             shc.algorithmConstraints, shc.negotiatedProtocol,
                             spec.signatureSchemes);
+            if (sss == null || sss.isEmpty()) {
+                throw shc.conContext.fatal(Alert.HANDSHAKE_FAILURE,
+                        "No supported signature algorithm");
+            }
             shc.peerRequestedSignatureSchemes = sss;
 
             // If no "signature_algorithms_cert" extension is present, then
@@ -332,7 +336,7 @@ public void absent(ConnectionContext context,
             if (shc.negotiatedProtocol.useTLS13PlusSpec()) {
                 throw shc.conContext.fatal(Alert.MISSING_EXTENSION,
                     "No mandatory signature_algorithms extension in the " +
-                    "received CertificateRequest handshake message");
+                    "received ClientHello handshake message");
             }
         }
     }
@@ -516,6 +520,10 @@ public void consume(ConnectionContext context,
                             chc.sslConfig,
                             chc.algorithmConstraints, chc.negotiatedProtocol,
                             spec.signatureSchemes);
+            if (sss == null || sss.isEmpty()) {
+                throw chc.conContext.fatal(Alert.HANDSHAKE_FAILURE,
+                        "No supported signature algorithm");
+            }
             chc.peerRequestedSignatureSchemes = sss;
 
             // If no "signature_algorithms_cert" extension is present, then