Merge pull request SAP#2121 from SAP/pr-jdk-26+26

Merge to tag jdk-26+26

Author: RealCLanger

doc/testing.html

@@ -535,6 +535,8 @@ <h4 id="repeat_count">REPEAT_COUNT</h4>
 <h4 id="report">REPORT</h4>
 <p>Use this report style when reporting test results (sent to JTReg as
 <code>-report</code>). Defaults to <code>files</code>.</p>
+<h4 id="manual">MANUAL</h4>
+<p>Set to <code>true</code> to execute manual tests only.</p>
 <h3 id="gtest-keywords">Gtest keywords</h3>
 <h4 id="repeat">REPEAT</h4>
 <p>The number of times to repeat the tests

doc/testing.md

@@ -512,6 +512,10 @@ helps to reproduce intermittent test failures. Defaults to 0.
 Use this report style when reporting test results (sent to JTReg as `-report`).
 Defaults to `files`.
 
+#### MANUAL
+
+Set to `true` to execute manual tests only.
+
 ### Gtest keywords
 
 #### REPEAT

make/RunTests.gmk

@@ -206,7 +206,7 @@ $(eval $(call ParseKeywordVariable, JTREG, \
     SINGLE_KEYWORDS := JOBS TIMEOUT_FACTOR FAILURE_HANDLER_TIMEOUT \
         TEST_MODE ASSERT VERBOSE RETAIN TEST_THREAD_FACTORY JVMTI_STRESS_AGENT \
         MAX_MEM RUN_PROBLEM_LISTS RETRY_COUNT REPEAT_COUNT MAX_OUTPUT REPORT \
-        AOT_JDK $(CUSTOM_JTREG_SINGLE_KEYWORDS), \
+        AOT_JDK MANUAL $(CUSTOM_JTREG_SINGLE_KEYWORDS), \
     STRING_KEYWORDS := OPTIONS JAVA_OPTIONS VM_OPTIONS KEYWORDS \
         EXTRA_PROBLEM_LISTS LAUNCHER_OPTIONS \
         $(CUSTOM_JTREG_STRING_KEYWORDS), \
@@ -911,7 +911,13 @@ define SetupRunJtregTestBody
       -vmoption:-Dtest.boot.jdk="$$(BOOT_JDK)" \
       -vmoption:-Djava.io.tmpdir="$$($1_TEST_TMP_DIR)"
 
-  $1_JTREG_BASIC_OPTIONS += -automatic -ignore:quiet
+  $1_JTREG_BASIC_OPTIONS += -ignore:quiet
+
+  ifeq ($$(JTREG_MANUAL), true)
+    $1_JTREG_BASIC_OPTIONS += -manual
+  else
+    $1_JTREG_BASIC_OPTIONS += -automatic
+  endif
 
   # Make it possible to specify the JIB_DATA_DIR for tests using the
   # JIB Artifact resolver
@@ -1151,6 +1157,7 @@ define SetupRunJtregTestBody
 	      $$(EXPR) $$($1_PASSED) + $$($1_FAILED) + $$($1_ERROR) + $$($1_SKIPPED))) \
 	, \
 	  $$(eval $1_PASSED_AND_RUNTIME_SKIPPED := 0) \
+	  $$(eval $1_PASSED := 0) \
 	  $$(eval $1_RUNTIME_SKIPPED := 0) \
 	  $$(eval $1_SKIPPED := 0) \
 	  $$(eval $1_FAILED := 0) \

make/autoconf/flags-cflags.m4

@@ -282,10 +282,17 @@ AC_DEFUN([FLAGS_SETUP_OPTIMIZATION],
     C_O_FLAG_DEBUG_JVM="-O0"
     C_O_FLAG_NONE="-O0"
 
+    if test "x$TOOLCHAIN_TYPE" = xgcc; then
+      C_O_FLAG_LTO="-flto=auto -fuse-linker-plugin -fno-strict-aliasing -fno-fat-lto-objects"
+    else
+      C_O_FLAG_LTO="-flto -fno-strict-aliasing"
+    fi
+
     if test "x$TOOLCHAIN_TYPE" = xclang && test "x$OPENJDK_TARGET_OS" = xaix; then
       C_O_FLAG_HIGHEST_JVM="${C_O_FLAG_HIGHEST_JVM} -finline-functions"
       C_O_FLAG_HIGHEST="${C_O_FLAG_HIGHEST} -finline-functions"
       C_O_FLAG_HI="${C_O_FLAG_HI} -finline-functions"
+      C_O_FLAG_LTO="${C_O_FLAG_LTO} -ffat-lto-objects"
     fi
 
     # -D_FORTIFY_SOURCE=2 hardening option needs optimization (at least -O1) enabled
@@ -317,6 +324,7 @@ AC_DEFUN([FLAGS_SETUP_OPTIMIZATION],
     C_O_FLAG_DEBUG_JVM=""
     C_O_FLAG_NONE="-Od"
     C_O_FLAG_SIZE="-O1"
+    C_O_FLAG_LTO="-GL"
   fi
 
   # Now copy to C++ flags
@@ -328,6 +336,7 @@ AC_DEFUN([FLAGS_SETUP_OPTIMIZATION],
   CXX_O_FLAG_DEBUG_JVM="$C_O_FLAG_DEBUG_JVM"
   CXX_O_FLAG_NONE="$C_O_FLAG_NONE"
   CXX_O_FLAG_SIZE="$C_O_FLAG_SIZE"
+  CXX_O_FLAG_LTO="$C_O_FLAG_LTO"
 
   # Adjust optimization flags according to debug level.
   case $DEBUG_LEVEL in
@@ -360,12 +369,15 @@ AC_DEFUN([FLAGS_SETUP_OPTIMIZATION],
   AC_SUBST(C_O_FLAG_NORM)
   AC_SUBST(C_O_FLAG_NONE)
   AC_SUBST(C_O_FLAG_SIZE)
+  AC_SUBST(C_O_FLAG_LTO)
+
   AC_SUBST(CXX_O_FLAG_HIGHEST_JVM)
   AC_SUBST(CXX_O_FLAG_HIGHEST)
   AC_SUBST(CXX_O_FLAG_HI)
   AC_SUBST(CXX_O_FLAG_NORM)
   AC_SUBST(CXX_O_FLAG_NONE)
   AC_SUBST(CXX_O_FLAG_SIZE)
+  AC_SUBST(CXX_O_FLAG_LTO)
 ])
 
 AC_DEFUN([FLAGS_SETUP_CFLAGS],

make/autoconf/flags-ldflags.m4

@@ -50,7 +50,14 @@ AC_DEFUN([FLAGS_SETUP_LDFLAGS_HELPER],
     # add -z,relro (mark relocations read only) for all libs
     # add -z,now ("full relro" - more of the Global Offset Table GOT is marked read only)
     # add --no-as-needed to disable default --as-needed link flag on some GCC toolchains
+    # add --icf=all (Identical Code Folding — merges identical functions)
     BASIC_LDFLAGS="-Wl,-z,defs -Wl,-z,relro -Wl,-z,now -Wl,--no-as-needed -Wl,--exclude-libs,ALL"
+    if test "x$LINKER_TYPE" = "xgold"; then
+      if test x$DEBUG_LEVEL = xrelease; then
+        BASIC_LDFLAGS="$BASIC_LDFLAGS -Wl,--icf=all"
+      fi
+    fi
+
     # Linux : remove unused code+data in link step
     if test "x$ENABLE_LINKTIME_GC" = xtrue; then
       if test "x$OPENJDK_TARGET_CPU" = xs390x; then
@@ -61,13 +68,15 @@ AC_DEFUN([FLAGS_SETUP_LDFLAGS_HELPER],
     fi
 
     BASIC_LDFLAGS_JVM_ONLY=""
+    LDFLAGS_LTO="-flto=auto -fuse-linker-plugin -fno-strict-aliasing"
 
     LDFLAGS_CXX_PARTIAL_LINKING="$MACHINE_FLAG -r"
 
   elif test "x$TOOLCHAIN_TYPE" = xclang; then
     BASIC_LDFLAGS_JVM_ONLY="-mno-omit-leaf-frame-pointer -mstack-alignment=16 \
         -fPIC"
 
+    LDFLAGS_LTO="-flto=auto -fuse-linker-plugin -fno-strict-aliasing"
     LDFLAGS_CXX_PARTIAL_LINKING="$MACHINE_FLAG -r"
 
     if test "x$OPENJDK_TARGET_OS" = xlinux; then
@@ -87,6 +96,7 @@ AC_DEFUN([FLAGS_SETUP_LDFLAGS_HELPER],
     BASIC_LDFLAGS="-opt:ref"
     BASIC_LDFLAGS_JDK_ONLY="-incremental:no"
     BASIC_LDFLAGS_JVM_ONLY="-opt:icf,8 -subsystem:windows"
+    LDFLAGS_LTO="-LTCG:INCREMENTAL"
   fi
 
   if (test "x$TOOLCHAIN_TYPE" = xgcc || test "x$TOOLCHAIN_TYPE" = xclang) \
@@ -148,6 +158,7 @@ AC_DEFUN([FLAGS_SETUP_LDFLAGS_HELPER],
 
   # Export some intermediate variables for compatibility
   LDFLAGS_CXX_JDK="$DEBUGLEVEL_LDFLAGS_JDK_ONLY"
+  AC_SUBST(LDFLAGS_LTO)
   AC_SUBST(LDFLAGS_CXX_JDK)
   AC_SUBST(LDFLAGS_CXX_PARTIAL_LINKING)
 ])

make/autoconf/spec.gmk.template

@@ -522,12 +522,14 @@ C_O_FLAG_HI := @C_O_FLAG_HI@
 C_O_FLAG_NORM := @C_O_FLAG_NORM@
 C_O_FLAG_NONE := @C_O_FLAG_NONE@
 C_O_FLAG_SIZE := @C_O_FLAG_SIZE@
+C_O_FLAG_LTO := @C_O_FLAG_LTO@
 CXX_O_FLAG_HIGHEST_JVM := @CXX_O_FLAG_HIGHEST_JVM@
 CXX_O_FLAG_HIGHEST := @CXX_O_FLAG_HIGHEST@
 CXX_O_FLAG_HI := @CXX_O_FLAG_HI@
 CXX_O_FLAG_NORM := @CXX_O_FLAG_NORM@
 CXX_O_FLAG_NONE := @CXX_O_FLAG_NONE@
 CXX_O_FLAG_SIZE := @CXX_O_FLAG_SIZE@
+CXX_O_FLAG_LTO  := @CXX_O_FLAG_LTO@
 
 GENDEPS_FLAGS := @GENDEPS_FLAGS@
 
@@ -596,6 +598,9 @@ LDFLAGS_CXX_JDK := @LDFLAGS_CXX_JDK@
 # LDFLAGS specific to partial linking.
 LDFLAGS_CXX_PARTIAL_LINKING := @LDFLAGS_CXX_PARTIAL_LINKING@
 
+# LDFLAGS specific to link time optimization
+LDFLAGS_LTO := @LDFLAGS_LTO@
+
 # Sometimes a different linker is needed for c++ libs
 LDCXX := @LDCXX@
 # The flags for linking libstdc++ linker.

make/autoconf/toolchain.m4

@@ -516,6 +516,7 @@ AC_DEFUN([TOOLCHAIN_EXTRACT_LD_VERSION],
     if [ [[ "$LINKER_VERSION_STRING" == *gold* ]] ]; then
       [ LINKER_VERSION_NUMBER=`$ECHO $LINKER_VERSION_STRING | \
           $SED -e 's/.* \([0-9][0-9]*\(\.[0-9][0-9]*\)*\).*) .*/\1/'` ]
+      LINKER_TYPE=gold
     else
       [ LINKER_VERSION_NUMBER=`$ECHO $LINKER_VERSION_STRING | \
           $SED -e 's/.* \([0-9][0-9]*\(\.[0-9][0-9]*\)*\).*/\1/'` ]

make/common/NativeCompilation.gmk

@@ -98,6 +98,7 @@ include native/Paths.gmk
 #   SYSROOT_CFLAGS the compiler flags for using the specific sysroot
 #   SYSROOT_LDFLAGS the linker flags for using the specific sysroot
 #   OPTIMIZATION sets optimization level to NONE, LOW, HIGH, HIGHEST, HIGHEST_JVM, SIZE
+#   LINK_TIME_OPTIMIZATION if set to true, enables link time optimization
 #   DISABLED_WARNINGS_<toolchain> Disable the given warnings for the specified toolchain
 #   DISABLED_WARNINGS_<toolchain>_<OS> Disable the given warnings for the specified
 #       toolchain and target OS

make/common/native/Flags.gmk

@@ -194,6 +194,11 @@ define SetupCompilerFlags
     $1_EXTRA_CXXFLAGS += $(CFLAGS_WARNINGS_ARE_ERRORS)
   endif
 
+  ifeq (true, $$($1_LINK_TIME_OPTIMIZATION))
+    $1_EXTRA_CFLAGS += $(C_O_FLAG_LTO)
+    $1_EXTRA_CXXFLAGS += $(CXX_O_FLAG_LTO)
+  endif
+
   ifeq (NONE, $$($1_OPTIMIZATION))
     $1_OPT_CFLAGS := $(C_O_FLAG_NONE)
     $1_OPT_CXXFLAGS := $(CXX_O_FLAG_NONE)
@@ -222,6 +227,10 @@ define SetupLinkerFlags
   # Pickup extra OPENJDK_TARGET_OS_TYPE, OPENJDK_TARGET_OS and TOOLCHAIN_TYPE
   # dependent variables for LDFLAGS and LIBS, and additionally the pair dependent
   # TOOLCHAIN_TYPE plus OPENJDK_TARGET_OS
+  ifeq ($$($1_LINK_TIME_OPTIMIZATION), true)
+    $1_EXTRA_LDFLAGS += $(LDFLAGS_LTO)
+  endif
+
   $1_EXTRA_LDFLAGS += $$($1_LDFLAGS_$(OPENJDK_TARGET_OS_TYPE)) $$($1_LDFLAGS_$(OPENJDK_TARGET_OS)) \
       $$($1_LDFLAGS_$(TOOLCHAIN_TYPE)) $$($1_LDFLAGS_$(TOOLCHAIN_TYPE)_$(OPENJDK_TARGET_OS))
   $1_EXTRA_LIBS += $$($1_LIBS_$(OPENJDK_TARGET_OS_TYPE)) $$($1_LIBS_$(OPENJDK_TARGET_OS)) \

make/hotspot/lib/CompileJvm.gmk

@@ -234,6 +234,7 @@ $(eval $(call SetupJdkLibrary, BUILD_LIBJVM, \
     LDFLAGS := $(JVM_LDFLAGS), \
     LIBS := $(JVM_LIBS), \
     OPTIMIZATION := $(JVM_OPTIMIZATION), \
+    LINK_TIME_OPTIMIZATION := $(JVM_LTO), \
     OBJECT_DIR := $(JVM_OUTPUTDIR)/objs, \
     STRIPFLAGS := $(JVM_STRIPFLAGS), \
     EMBED_MANIFEST := true, \