JetBrains · sercher · Mar 31, 2025 · Apr 2, 2025 · Apr 2, 2025 · Apr 2, 2025
diff --git a/.jcheck/conf b/.jcheck/conf
@@ -1,7 +1,7 @@
 [general]
 project=jdk-updates
 jbs=JDK
-version=21.0.7
+version=21.0.8
 
 [checks]
 error=author,committer,reviewers,merge,issues,executable,symlink,message,hg-tag,whitespace,problemlists

diff --git a/make/Bundles.gmk b/make/Bundles.gmk
@@ -242,7 +242,10 @@ ifneq ($(filter product-bundles% legacy-bundles, $(MAKECMDGOALS)), )
       )
 
   JDK_SYMBOLS_BUNDLE_FILES := \
-      $(call FindFiles, $(SYMBOLS_IMAGE_DIR))
+      $(filter-out \
+          %.stripped.pdb, \
+          $(call FindFiles, $(SYMBOLS_IMAGE_DIR)) \
+      )
 
   TEST_DEMOS_BUNDLE_FILES := $(filter $(JDK_DEMOS_IMAGE_HOMEDIR)/demo/%, \
       $(ALL_JDK_DEMOS_FILES))

diff --git a/make/RunTests.gmk b/make/RunTests.gmk
@@ -602,7 +602,7 @@ define SetupRunMicroTestBody
     $1_JMH_JVM_ARGS += $$(MICRO_VM_OPTIONS) $$(MICRO_JAVA_OPTIONS)
   endif
 
-  $1_MICRO_VM_OPTIONS := -jvmArgs $(call ShellQuote,$$($1_JMH_JVM_ARGS))
+  $1_MICRO_VM_OPTIONS := -jvmArgsPrepend $(call ShellQuote,$$($1_JMH_JVM_ARGS))
 
   ifneq ($$(MICRO_ITER), )
     $1_MICRO_ITER := -i $$(MICRO_ITER)
@@ -848,6 +848,10 @@ define SetupRunJtregTestBody
     endif
   endif
 
+  ifneq ($$(findstring -XX:+UseShenandoahGC, $$(JTREG_ALL_OPTIONS)), )
+    JTREG_AUTO_PROBLEM_LISTS += ProblemList-shenandoah.txt
+  endif
+
   ifneq ($$(JTREG_EXTRA_PROBLEM_LISTS), )
     # Accept both absolute paths as well as relative to the current test root.
     $1_JTREG_BASIC_OPTIONS += $$(addprefix $$(JTREG_PROBLEM_LIST_PREFIX), $$(wildcard \

diff --git a/make/autoconf/jdk-options.m4 b/make/autoconf/jdk-options.m4
@@ -197,9 +197,8 @@ AC_DEFUN_ONCE([JDKOPT_SETUP_JDK_OPTIONS],
   # three different page sizes: 4K, 64K, and if run on Mac m1 hardware, 16K.
   COMPATIBLE_CDS_ALIGNMENT_DEFAULT=false
   if test "x$OPENJDK_TARGET_OS" = "xlinux" && test "x$OPENJDK_TARGET_CPU" = "xaarch64"; then
-    COMPATIBLE_CDS_ALIGNMENT_DEFAULT=true
+    COMPATIBLE_CDS_ALIGNMENT_DEFAULT=auto
   fi
-  AC_SUBST(COMPATIBLE_CDS_ALIGNMENT_DEFAULT)
 
   # Compress jars
   COMPRESS_JARS=false
@@ -718,7 +717,7 @@ AC_DEFUN([JDKOPT_ENABLE_DISABLE_COMPATIBLE_CDS_ALIGNMENT],
   UTIL_ARG_ENABLE(NAME: compatible-cds-alignment, DEFAULT: $COMPATIBLE_CDS_ALIGNMENT_DEFAULT,
       RESULT: ENABLE_COMPATIBLE_CDS_ALIGNMENT,
       DESC: [enable use alternative compatible cds core region alignment],
-      DEFAULT_DESC: [disabled],
+      DEFAULT_DESC: [disabled except on linux-aarch64],
       CHECKING_MSG: [if compatible cds region alignment enabled],
       CHECK_AVAILABLE: [
         AC_MSG_CHECKING([if CDS archive is available])

diff --git a/make/conf/version-numbers.conf b/make/conf/version-numbers.conf
@@ -28,12 +28,12 @@
 
 DEFAULT_VERSION_FEATURE=21
 DEFAULT_VERSION_INTERIM=0
-DEFAULT_VERSION_UPDATE=7
+DEFAULT_VERSION_UPDATE=8
 DEFAULT_VERSION_PATCH=0
 DEFAULT_VERSION_EXTRA1=0
 DEFAULT_VERSION_EXTRA2=0
 DEFAULT_VERSION_EXTRA3=0
-DEFAULT_VERSION_DATE=2025-04-15
+DEFAULT_VERSION_DATE=2025-07-15
 DEFAULT_VERSION_CLASSFILE_MAJOR=65  # "`$EXPR $DEFAULT_VERSION_FEATURE + 44`"
 DEFAULT_VERSION_CLASSFILE_MINOR=0
 DEFAULT_VERSION_DOCS_API_SINCE=11

diff --git a/make/hotspot/lib/CompileGtest.gmk b/make/hotspot/lib/CompileGtest.gmk
@@ -57,7 +57,8 @@ $(eval $(call SetupJdkLibrary, BUILD_GTEST_LIBGTEST, \
         $(GTEST_FRAMEWORK_SRC)/googletest/src \
         $(GTEST_FRAMEWORK_SRC)/googlemock/src, \
     INCLUDE_FILES := gtest-all.cc gmock-all.cc, \
-    DISABLED_WARNINGS_gcc := undef unused-result format-nonliteral maybe-uninitialized, \
+    DISABLED_WARNINGS_gcc := undef unused-result format-nonliteral \
+        maybe-uninitialized zero-as-null-pointer-constant, \
     DISABLED_WARNINGS_clang := undef unused-result format-nonliteral, \
     CFLAGS := $(JVM_CFLAGS) \
         -I$(GTEST_FRAMEWORK_SRC)/googletest \

diff --git a/make/modules/java.desktop/lib/Awt2dLibraries.gmk b/make/modules/java.desktop/lib/Awt2dLibraries.gmk
@@ -501,7 +501,7 @@ $(eval $(call SetupJdkLibrary, BUILD_LIBLCMS, \
         common/awt/debug \
         libawt/java2d, \
     HEADERS_FROM_SRC := $(LIBLCMS_HEADERS_FROM_SRC), \
-    DISABLED_WARNINGS_gcc := format-nonliteral type-limits stringop-truncation, \
+    DISABLED_WARNINGS_gcc := format-nonliteral stringop-truncation, \
     DISABLED_WARNINGS_clang := format-nonliteral, \
     DISABLED_WARNINGS_clang_cmstypes.c := unused-but-set-parameter, \
     LDFLAGS := $(LDFLAGS_JDKLIB) \
@@ -678,7 +678,7 @@ else
    # range-loop-analysis  -> clang on Xcode12
 
    HARFBUZZ_DISABLED_WARNINGS_gcc := missing-field-initializers strict-aliasing \
-       unused-result array-bounds parentheses
+       unused-result array-bounds parentheses dangling-pointer
    # noexcept-type required for GCC 7 builds. Not required for GCC 8+.
    # expansion-to-defined required for GCC 9 builds. Not required for GCC 10+.
    # maybe-uninitialized required for GCC 8 builds. Not required for GCC 9+.
@@ -1037,6 +1037,7 @@ ifeq ($(ENABLE_HEADLESS_ONLY), false)
       EXCLUDE_SRC_PATTERNS := $(LIBSPLASHSCREEN_EXCLUDE_SRC_PATTERNS), \
       DISABLED_WARNINGS_gcc := $(LIBSPLASHSCREEN_DISABLED_WARNINGS_gcc), \
       DISABLED_WARNINGS_clang := $(LIBSPLASHSCREEN_DISABLED_WARNINGS_clang), \
+      DISABLED_WARNINGS_clang_png.c := $(LIBSPLASHSCREEN_DISABLED_WARNINGS_clang) unused-function, \
       DISABLED_WARNINGS_microsoft := $(LIBSPLASHSCREEN_DISABLED_WARNINGS_microsoft), \
       EXCLUDE_FILES := $(LIBSPLASHSCREEN_EXCLUDE_FILES), \
       EXCLUDES := $(LIBSPLASHSCREEN_EXCLUDES), \

diff --git a/make/modules/jdk.jdwp.agent/Lib.gmk b/make/modules/jdk.jdwp.agent/Lib.gmk
@@ -58,6 +58,7 @@ $(eval $(call SetupJdkLibrary, BUILD_LIBJDWP, \
     DISABLED_WARNINGS_clang_EventRequestImpl.c := self-assign, \
     DISABLED_WARNINGS_clang_inStream.c := sometimes-uninitialized, \
     DISABLED_WARNINGS_clang_log_messages.c := format-nonliteral, \
+    DISABLED_WARNINGS_microsoft_debugInit.c := 5287, \
     EXTRA_HEADER_DIRS := \
       include \
       libjdwp/export, \

diff --git a/src/hotspot/cpu/aarch64/aarch64.ad b/src/hotspot/cpu/aarch64/aarch64.ad
@@ -1,6 +1,6 @@
 //
 // Copyright (c) 2003, 2023, Oracle and/or its affiliates. All rights reserved.
-// Copyright (c) 2014, 2021, Red Hat, Inc. All rights reserved.
+// Copyright (c) 2014, 2024, Red Hat, Inc. 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
@@ -1648,8 +1648,8 @@ int MachCallRuntimeNode::ret_addr_offset() {
   // for real runtime callouts it will be six instructions
   // see aarch64_enc_java_to_runtime
   //   adr(rscratch2, retaddr)
+  //   str(rscratch2, Address(rthread, JavaThread::last_Java_pc_offset()));
   //   lea(rscratch1, RuntimeAddress(addr)
-  //   stp(zr, rscratch2, Address(__ pre(sp, -2 * wordSize)))
   //   blr(rscratch1)
   CodeBlob *cb = CodeCache::find_blob(_entry_point);
   if (cb) {
@@ -2739,10 +2739,6 @@ typedef void (MacroAssembler::* mem_vector_insn)(FloatRegister Rt,
   {
     Address addr = mem2address(opcode, base, index, scale, disp);
     if (addr.getMode() == Address::base_plus_offset) {
-      /* If we get an out-of-range offset it is a bug in the compiler,
-         so we assert here. */
-      assert(Address::offset_ok_for_immed(addr.offset(), exact_log2(size_in_memory)),
-             "c2 compiler bug");
       /* Fix up any out-of-range offsets. */
       assert_different_registers(rscratch1, base);
       assert_different_registers(rscratch1, reg);
@@ -3774,14 +3770,13 @@ encode %{
       __ post_call_nop();
     } else {
       Label retaddr;
+      // Make the anchor frame walkable
       __ adr(rscratch2, retaddr);
+      __ str(rscratch2, Address(rthread, JavaThread::last_Java_pc_offset()));
       __ lea(rscratch1, RuntimeAddress(entry));
-      // Leave a breadcrumb for JavaFrameAnchor::capture_last_Java_pc()
-      __ stp(zr, rscratch2, Address(__ pre(sp, -2 * wordSize)));
       __ blr(rscratch1);
       __ bind(retaddr);
       __ post_call_nop();
-      __ add(sp, sp, 2 * wordSize);
     }
     if (Compile::current()->max_vector_size() > 0) {
       __ reinitialize_ptrue();
@@ -16696,6 +16691,39 @@ instruct partialSubtypeCheck(iRegP_R4 sub, iRegP_R0 super, iRegP_R2 temp, iRegP_
   ins_pipe(pipe_class_memory);
 %}
 
+instruct partialSubtypeCheckConstSuper(iRegP_R4 sub, iRegP_R0 super_reg, immP super_con, vRegD_V0 vtemp, iRegP_R5 result,
+                                       iRegP_R1 tempR1, iRegP_R2 tempR2, iRegP_R3 tempR3,
+                                       rFlagsReg cr)
+%{
+  match(Set result (PartialSubtypeCheck sub (Binary super_reg super_con)));
+  predicate(UseSecondarySupersTable);
+  effect(KILL cr, TEMP tempR1, TEMP tempR2, TEMP tempR3, TEMP vtemp);
+
+  ins_cost(700);  // smaller than the next version
+  format %{ "partialSubtypeCheck $result, $sub, super" %}
+
+  ins_encode %{
+    bool success = false;
+    u1 super_klass_slot = ((Klass*)$super_con$$constant)->hash_slot();
+    if (InlineSecondarySupersTest) {
+      success = __ lookup_secondary_supers_table($sub$$Register, $super_reg$$Register,
+                                                 $tempR1$$Register, $tempR2$$Register, $tempR3$$Register,
+                                                 $vtemp$$FloatRegister,
+                                                 $result$$Register,
+                                                 super_klass_slot);
+    } else {
+      address call = __ trampoline_call(RuntimeAddress(StubRoutines::lookup_secondary_supers_table_stub(super_klass_slot)));
+      success = (call != nullptr);
+    }
+    if (!success) {
+      ciEnv::current()->record_failure("CodeCache is full");
+      return;
+    }
+  %}
+
+  ins_pipe(pipe_class_memory);
+%}
+
 instruct partialSubtypeCheckVsZero(iRegP_R4 sub, iRegP_R0 super, iRegP_R2 temp, iRegP_R5 result, immP0 zero, rFlagsReg cr)
 %{
   match(Set cr (CmpP (PartialSubtypeCheck sub super) zero));

diff --git a/src/hotspot/cpu/aarch64/abstractInterpreter_aarch64.cpp b/src/hotspot/cpu/aarch64/abstractInterpreter_aarch64.cpp
@@ -150,7 +150,8 @@ void AbstractInterpreter::layout_activation(Method* method,
 
 #ifdef ASSERT
   if (caller->is_interpreted_frame()) {
-    assert(locals < caller->fp() + frame::interpreter_frame_initial_sp_offset, "bad placement");
+    assert(locals <= caller->interpreter_frame_expression_stack(), "bad placement");
+    assert(locals >= interpreter_frame->sender_sp() + max_locals - 1, "bad placement");
   }
 #endif
 

diff --git a/src/hotspot/cpu/aarch64/assembler_aarch64.hpp b/src/hotspot/cpu/aarch64/assembler_aarch64.hpp
@@ -2631,6 +2631,7 @@ template<typename R, typename... Rx>
 
 #undef INSN
 
+  // Advanced SIMD across lanes
 #define INSN(NAME, opc, opc2, accepted) \
   void NAME(FloatRegister Vd, SIMD_Arrangement T, FloatRegister Vn) {                   \
     guarantee(T != T1Q && T != T1D, "incorrect arrangement");                           \

diff --git a/src/hotspot/cpu/aarch64/c1_LIRAssembler_aarch64.cpp b/src/hotspot/cpu/aarch64/c1_LIRAssembler_aarch64.cpp
@@ -276,14 +276,14 @@ void LIR_Assembler::osr_entry() {
       // verify the interpreter's monitor has a non-null object
       {
         Label L;
-        __ ldr(rscratch1, Address(OSR_buf, slot_offset + 1*BytesPerWord));
+        __ ldr(rscratch1, __ form_address(rscratch1, OSR_buf, slot_offset + 1*BytesPerWord, 0));
         __ cbnz(rscratch1, L);
         __ stop("locked object is null");
         __ bind(L);
       }
 #endif
-      __ ldr(r19, Address(OSR_buf, slot_offset));
-      __ ldr(r20, Address(OSR_buf, slot_offset + BytesPerWord));
+      __ ldr(r19, __ form_address(rscratch1, OSR_buf, slot_offset, 0));
+      __ ldr(r20, __ form_address(rscratch1, OSR_buf, slot_offset + BytesPerWord, 0));
       __ str(r19, frame_map()->address_for_monitor_lock(i));
       __ str(r20, frame_map()->address_for_monitor_object(i));
     }

diff --git a/src/hotspot/cpu/aarch64/c2_MacroAssembler_aarch64.cpp b/src/hotspot/cpu/aarch64/c2_MacroAssembler_aarch64.cpp
@@ -107,14 +107,20 @@ address C2_MacroAssembler::arrays_hashcode(Register ary, Register cnt, Register
   assert(is_power_of_2(unroll_factor), "can't use this value to calculate the jump target PC");
   andr(tmp2, cnt, unroll_factor - 1);
   adr(tmp1, BR_BASE);
-  sub(tmp1, tmp1, tmp2, ext::sxtw, 3);
+  // For Cortex-A53 offset is 4 because 2 nops are generated.
+  sub(tmp1, tmp1, tmp2, ext::sxtw, VM_Version::supports_a53mac() ? 4 : 3);
   movw(tmp2, 0x1f);
   br(tmp1);
 
   bind(LOOP);
   for (size_t i = 0; i < unroll_factor; ++i) {
     load(tmp1, Address(post(ary, type2aelembytes(eltype))), eltype);
     maddw(result, result, tmp2, tmp1);
+    // maddw generates an extra nop for Cortex-A53 (see maddw definition in macroAssembler).
+    // Generate 2nd nop to have 4 instructions per iteration.
+    if (VM_Version::supports_a53mac()) {
+      nop();
+    }
   }
   bind(BR_BASE);
   subsw(cnt, cnt, unroll_factor);