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# Copyright (c) 2013, 2024, Oracle and/or its affiliates. All rights reserved.
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# DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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# This code is free software; you can redistribute it and/or modify it
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# under the terms of the GNU General Public License version 2 only, as
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# published by the Free Software Foundation. Oracle designates this
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# particular file as subject to the "Classpath" exception as provided
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# by Oracle in the LICENSE file that accompanied this code.
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# This code is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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# FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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# version 2 for more details (a copy is included in the LICENSE file that
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# accompanied this code).
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# You should have received a copy of the GNU General Public License version
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# 2 along with this work; if not, write to the Free Software Foundation,
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# Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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# Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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# or visit www.oracle.com if you need additional information or have any
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# Include support files that will setup compiler flags due to the selected
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# jvm feature set, specific file overrides, and general flags.
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include lib/JvmFeatures.gmk
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include lib/JvmOverrideFiles.gmk
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include lib/JvmFlags.gmk
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################################################################################
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# Setup compilation of the main Hotspot native library (libjvm).
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JVM_OUTPUTDIR := $(JVM_VARIANT_OUTPUTDIR)/libjvm
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################################################################################
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# Platform independent setup
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$(SHARED_LIBRARY_FLAGS) \
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$(JVM_LDFLAGS_FEATURES) \
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JVM_ASFLAGS += $(EXTRA_ASFLAGS)
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-I$(TOPDIR)/src/hotspot/os_cpu/$(HOTSPOT_TARGET_OS)_$(HOTSPOT_TARGET_CPU_ARCH) \
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-I$(TOPDIR)/src/hotspot/os/$(HOTSPOT_TARGET_OS) \
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-I$(TOPDIR)/src/hotspot/os/$(HOTSPOT_TARGET_OS_TYPE) \
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$(JVM_LIBS_FEATURES) \
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# These files and directories are always excluded
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JVM_EXCLUDE_FILES += args.cc
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# Needed by abstract_vm_version.cpp
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ifeq ($(call isTargetCpu, x86_64), true)
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OPENJDK_TARGET_CPU_VM_VERSION := amd64
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OPENJDK_TARGET_CPU_VM_VERSION := $(OPENJDK_TARGET_CPU)
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ifeq ($(VERSION_BUILD), )
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# Hotspot cannot handle an empty build number
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ifeq ($(HOTSPOT_BUILD_TIME), )
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HOTSPOT_BUILD_TIME := $(call EpochToISO8601, $(shell $(DATE) +"%s"))
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-DHOTSPOT_VERSION_STRING='"$(VERSION_STRING)"' \
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-DDEBUG_LEVEL='"$(DEBUG_LEVEL)"' \
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-DHOTSPOT_VM_DISTRO='"$(HOTSPOT_VM_DISTRO)"' \
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-DCPU='"$(OPENJDK_TARGET_CPU_VM_VERSION)"' \
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-DHOTSPOT_BUILD_TIME='"$(HOTSPOT_BUILD_TIME)"' \
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################################################################################
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DISABLED_WARNINGS_gcc := array-bounds comment delete-non-virtual-dtor \
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empty-body implicit-fallthrough int-in-bool-context \
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maybe-uninitialized missing-field-initializers \
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shift-negative-value unknown-pragmas
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DISABLED_WARNINGS_clang := sometimes-uninitialized \
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missing-braces delete-non-abstract-non-virtual-dtor unknown-pragmas
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ifneq ($(DEBUG_LEVEL), release)
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# Assert macro gives warning
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DISABLED_WARNINGS_clang += tautological-constant-out-of-range-compare
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# Some reasonable asserts produce warnings on GCC <= 7
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DISABLED_WARNINGS_gcc += strict-overflow
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DISABLED_WARNINGS_microsoft := 4624 4244 4291 4146 4127 4722
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################################################################################
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# Platform specific setup
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# ARM source selection
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ifeq ($(call And, $(call isTargetOs, linux) $(call isTargetCpu, arm)), true)
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JVM_EXCLUDE_PATTERNS += arm_64
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else ifeq ($(call And, $(call isTargetOs, linux) $(call isTargetCpu, aarch64)), true)
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# For 64-bit arm builds, we use the 64 bit hotspot/src/cpu/arm
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# hotspot sources if HOTSPOT_TARGET_CPU_ARCH is set to arm.
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# Exclude the aarch64 and 32 bit arm files for this build.
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ifeq ($(HOTSPOT_TARGET_CPU_ARCH), arm)
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JVM_EXCLUDE_PATTERNS += arm_32 aarch64
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ifeq ($(call isTargetOs, linux macosx windows), true)
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JVM_PRECOMPILED_HEADER := $(TOPDIR)/src/hotspot/share/precompiled/precompiled.hpp
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ifeq ($(call isTargetCpu, x86), true)
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JVM_EXCLUDE_PATTERNS += x86_64
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else ifeq ($(call isTargetCpu, x86_64), true)
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JVM_EXCLUDE_PATTERNS += x86_32
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JVM_OPTIMIZATION ?= HIGHEST_JVM
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# Need to set JVM_STRIPFLAGS to the default value from SPEC since the STRIPFLAGS
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# parameter to SetupJdkLibrary allows an empty value to override the
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JVM_STRIPFLAGS ?= $(STRIPFLAGS)
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# This source set is reused so save in cache.
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$(call FillFindCache, $(JVM_SRC_DIRS))
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ifeq ($(call isTargetOs, windows), true)
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ifeq ($(STATIC_LIBS), true)
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WIN_EXPORT_FILE := $(JVM_OUTPUTDIR)/static-win-exports.def
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WIN_EXPORT_FILE := $(JVM_OUTPUTDIR)/win-exports.def
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JVM_LDFLAGS += -def:$(WIN_EXPORT_FILE)
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ifeq ($(call isTargetOs, linux), true)
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HOTSPOT_VERSION_SCRIPT := $(TOPDIR)/make/data/hotspot-symbols/version-script-$(TOOLCHAIN_TYPE).txt
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JVM_LDFLAGS += -Wl,-version-script=$(HOTSPOT_VERSION_SCRIPT)
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################################################################################
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################################################################################
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$(eval $(call SetupJdkLibrary, BUILD_LIBJVM, \
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OUTPUT_DIR := $(JVM_LIB_OUTPUTDIR), \
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SRC := $(JVM_SRC_DIRS), \
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EXCLUDES := $(JVM_EXCLUDES), \
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EXCLUDE_FILES := $(JVM_EXCLUDE_FILES), \
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EXCLUDE_PATTERNS := $(JVM_EXCLUDE_PATTERNS), \
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DEFAULT_CFLAGS := false, \
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CFLAGS := $(JVM_CFLAGS), \
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abstract_vm_version.cpp_CXXFLAGS := $(CFLAGS_VM_VERSION), \
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arguments.cpp_CXXFLAGS := $(CFLAGS_VM_VERSION), \
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DISABLED_WARNINGS_gcc := $(DISABLED_WARNINGS_gcc), \
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DISABLED_WARNINGS_gcc_ad_$(HOTSPOT_TARGET_CPU_ARCH).cpp := nonnull, \
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DISABLED_WARNINGS_gcc_cgroupV1Subsystem_linux.cpp := address, \
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DISABLED_WARNINGS_gcc_cgroupV2Subsystem_linux.cpp := address, \
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DISABLED_WARNINGS_gcc_handshake.cpp := stringop-overflow, \
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DISABLED_WARNINGS_gcc_interp_masm_x86.cpp := uninitialized, \
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DISABLED_WARNINGS_gcc_jvmciCodeInstaller.cpp := stringop-overflow, \
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DISABLED_WARNINGS_gcc_jvmtiTagMap.cpp := stringop-overflow, \
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DISABLED_WARNINGS_gcc_postaloc.cpp := address, \
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DISABLED_WARNINGS_gcc_shenandoahLock.cpp := stringop-overflow, \
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DISABLED_WARNINGS_gcc_synchronizer.cpp := stringop-overflow, \
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DISABLED_WARNINGS_clang := $(DISABLED_WARNINGS_clang), \
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DISABLED_WARNINGS_clang_arguments.cpp := missing-field-initializers, \
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DISABLED_WARNINGS_clang_codeBuffer.cpp := tautological-undefined-compare, \
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DISABLED_WARNINGS_clang_directivesParser.cpp := missing-field-initializers, \
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DISABLED_WARNINGS_clang_g1ParScanThreadState.cpp := delete-abstract-non-virtual-dtor, \
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DISABLED_WARNINGS_clang_g1YoungGCPostEvacuateTasks.cpp := delete-abstract-non-virtual-dtor, \
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DISABLED_WARNINGS_clang_management.cpp := missing-field-initializers, \
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DISABLED_WARNINGS_clang_notificationThread.cpp := bitwise-instead-of-logical, \
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DISABLED_WARNINGS_clang_os_posix.cpp := mismatched-tags missing-field-initializers, \
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DISABLED_WARNINGS_clang_aix_os_posix.cpp := format-nonliteral, \
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DISABLED_WARNINGS_clang_postaloc.cpp := tautological-undefined-compare, \
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DISABLED_WARNINGS_clang_serviceThread.cpp := bitwise-instead-of-logical, \
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DISABLED_WARNINGS_clang_vm_version_x86.cpp := missing-field-initializers, \
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DISABLED_WARNINGS_clang_zTracer.cpp := undefined-var-template, \
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DISABLED_WARNINGS_clang_aix_debug.cpp := format-nonliteral, \
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DISABLED_WARNINGS_clang_aix_jvm.cpp := format-nonliteral, \
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DISABLED_WARNINGS_clang_aix_osThread_aix.cpp := tautological-undefined-compare, \
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DISABLED_WARNINGS_microsoft := $(DISABLED_WARNINGS_microsoft), \
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ASFLAGS := $(JVM_ASFLAGS), \
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LD_SET_ORIGIN := false, \
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DEFAULT_LDFLAGS := false, \
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LDFLAGS := $(JVM_LDFLAGS), \
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LIBS := $(JVM_LIBS), \
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OPTIMIZATION := $(JVM_OPTIMIZATION), \
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OBJECT_DIR := $(JVM_OUTPUTDIR)/objs, \
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STRIPFLAGS := $(JVM_STRIPFLAGS), \
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EMBED_MANIFEST := true, \
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RC_FILEDESC := $(HOTSPOT_VM_DISTRO) $(OPENJDK_TARGET_CPU_BITS)-Bit $(JVM_VARIANT) VM, \
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PRECOMPILED_HEADER := $(JVM_PRECOMPILED_HEADER), \
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PRECOMPILED_HEADER_EXCLUDE := $(JVM_PRECOMPILED_HEADER_EXCLUDE), \
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ifeq ($(call isTargetOs, windows), true)
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# The following lines create a list of vftable symbols to be filtered out of
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# the symbol file. Removing this line causes the linker to complain about too
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# many (> 64K) symbols, so the _guess_ is that this line is here to keep down
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# the number of exported symbols below that limit.
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# Some usages of C++ lambdas require the vftable symbol of classes that use
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# the lambda type as a template parameter. The usage of those classes won't
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# link if their vftable symbols are removed. That's why there's an exception
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# for vftable symbols containing the string 'lambda'.
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# A very simple example of a lambda usage that fails if the lambda vftable
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# symbols are missing in the symbol file:
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# #include <functional>
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# std::function<void()> f = [](){}237
FILTER_SYMBOLS_AWK_SCRIPT := \
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if ($$7 ~ /\?\?_7.*@@6B@/ && $$7 !~ /type_info/ && $$7 !~ /lambda/) print " " $$7; \
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# A more correct solution would be to send BUILD_LIBJVM_ALL_OBJS instead of
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# cd && *.obj, but this will result in very long command lines, which could be
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$(WIN_EXPORT_FILE): $(BUILD_LIBJVM_ALL_OBJS)
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$(call LogInfo, Generating list of symbols to export from object files)
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$(call MakeDir, $(@D))
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$(ECHO) "EXPORTS" > $@.tmp
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$(CD) $(BUILD_LIBJVM_OBJECT_DIR) && \
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$(DUMPBIN) -symbols *$(OBJ_SUFFIX) | $(AWK) $(FILTER_SYMBOLS_AWK_SCRIPT) | $(SORT) -u >> $@.tmp
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$(BUILD_LIBJVM_TARGET): $(WIN_EXPORT_FILE)
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# Always recompile abstract_vm_version.cpp if libjvm needs to be relinked. This ensures
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# that the internal vm version is updated as it relies on __DATE__ and __TIME__
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ABSTRACT_VM_VERSION_OBJ := $(JVM_OUTPUTDIR)/objs/abstract_vm_version$(OBJ_SUFFIX)
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$(ABSTRACT_VM_VERSION_OBJ): $(filter-out $(ABSTRACT_VM_VERSION_OBJ), \
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$(BUILD_LIBJVM_TARGET_DEPS))
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ifneq ($(GENERATE_COMPILE_COMMANDS_ONLY), true)
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ifeq ($(call isTargetOs, windows), true)
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# It doesn't matter which jvm.lib file gets exported, but we need
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ifeq ($(JVM_VARIANT), $(JVM_VARIANT_MAIN))
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$(eval $(call SetupCopyFiles, COPY_JVM_LIB, \
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DEST := $(LIB_OUTPUTDIR), \
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FILES :=$(BUILD_LIBJVM_IMPORT_LIBRARY), \
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TARGETS += $(COPY_JVM_LIB)
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# AIX warning explanation:
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# 1500-010 : (W) WARNING in ...: Infinite loop. Program may not stop.
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# There are several infinite loops in the vm, so better suppress.
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# 1540-0198 : (W) The omitted keyword "private" is assumed for base class "...".
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# 1540-0216 : (W) An expression of type .. cannot be converted to type ..
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# In hotspot this fires for functionpointer to pointer conversions
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# 1540-1088 : (W) The exception specification is being ignored.
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# In hotspot this is caused by throw() in declaration of new() in nmethod.hpp.
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# 1540-1090 : (I) The destructor of "..." might not be called.
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# 1540-1639 : (I) The behavior of long type bit fields has changed ...
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TARGETS += $(BUILD_LIBJVM)
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################################################################################
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# Hotspot disallows the use of global operators 'new' and 'delete'. This build
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# time check helps enforce this requirement. If you trigger this check and the
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# reference is not obvious from the source, GNU objdump can be used to help find
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# the reference if compiled with GCC:
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# objdump -lrdSC <path/to/file.o>
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# -r print relocation entries, interspersed with the disassembly
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# -S print source code, intermixed with disassembly
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# -l include filenames and line numbers
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# Search the output for the operator(s) of interest, to see where they are
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# When a reference to the global 'operator delete' is reported, it might be
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# due to a "deleting destructor". In this case, objdump may show the
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# reference to be associated with but not actually in a destructor. A
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# deleting destructor is automatically generated for a class whose destructor
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# is virtual. A deleting destructor requires an accessible 'operator delete'
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# for the associated class. If the class doesn't provide a more specific
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# declaration (either directly or by inheriting from a class that provides
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# one) then the global definition will be used, triggering this check.
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ifneq ($(GENERATE_COMPILE_COMMANDS_ONLY), true)
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ifneq ($(filter $(TOOLCHAIN_TYPE), gcc clang), )
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DEMANGLED_REGEXP := [^:]operator (new|delete)
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# Running c++filt to find offending symbols in all files is too expensive,
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# so use mangled names when looking for symbols.
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# Save the demangling for when something is actually found.
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UNDEF_PATTERN := ' U '
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define SetupOperatorNewDeleteCheck
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$$(call ExecuteWithLog, $1.op_check, \
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$$(NM) $$(NMFLAGS) $$< 2>&1 | $$(GREP) $$(addprefix -e , $$(MANGLED_SYMS)) | $$(GREP) $$(UNDEF_PATTERN) > $1.op_check || true)
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if [ -s $1.op_check ]; then \
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$$(ECHO) "$$(notdir $$<): Error: Use of global operators new and delete is not allowed in Hotspot:"; \
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$$(NM) $$(NMFLAGS) $$< | $$(CXXFILT) | $$(EGREP) '$$(DEMANGLED_REGEXP)' | $$(GREP) $$(UNDEF_PATTERN); \
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$$(ECHO) "See: $$(TOPDIR)/make/hotspot/lib/CompileJvm.gmk"; \
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TARGETS += $1.op_check
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$(foreach o, $(BUILD_LIBJVM_ALL_OBJS), $(eval $(call SetupOperatorNewDeleteCheck,$o)))