1 #
   2 # Copyright (c) 2013, 2019, Oracle and/or its affiliates. All rights reserved.
   3 # DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
   4 #
   5 # This code is free software; you can redistribute it and/or modify it
   6 # under the terms of the GNU General Public License version 2 only, as
   7 # published by the Free Software Foundation.  Oracle designates this
   8 # particular file as subject to the "Classpath" exception as provided
   9 # by Oracle in the LICENSE file that accompanied this code.
  10 #
  11 # This code is distributed in the hope that it will be useful, but WITHOUT
  12 # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  13 # FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  14 # version 2 for more details (a copy is included in the LICENSE file that
  15 # accompanied this code).
  16 #
  17 # You should have received a copy of the GNU General Public License version
  18 # 2 along with this work; if not, write to the Free Software Foundation,
  19 # Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  20 #
  21 # Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  22 # or visit www.oracle.com if you need additional information or have any
  23 # questions.
  24 #
  25 
  26 $(eval $(call IncludeCustomExtension, hotspot/lib/JvmOverrideFiles.gmk))
  27 
  28 ################################################################################
  29 # This file contains explicit overrides of CFLAGS and/or precompiled header
  30 # status for individual files on specific platforms.
  31 
  32 ifeq ($(TOOLCHAIN_TYPE), gcc)
  33   BUILD_LIBJVM_jfrThreadSampler.cpp_CXXFLAGS := -fno-strict-overflow
  34   BUILD_LIBJVM_vmStructs.cpp_CXXFLAGS := -fno-var-tracking-assignments
  35   BUILD_LIBJVM_jvmciCompilerToVM.cpp_CXXFLAGS := -fno-var-tracking-assignments
  36   BUILD_LIBJVM_jvmciCompilerToVMInit.cpp_CXXFLAGS := -fno-var-tracking-assignments
  37   BUILD_LIBJVM_assembler_x86.cpp_CXXFLAGS := -Wno-maybe-uninitialized
  38   BUILD_LIBJVM_cardTableBarrierSetAssembler_x86.cpp_CXXFLAGS := -Wno-maybe-uninitialized
  39   BUILD_LIBJVM_interp_masm_x86.cpp_CXXFLAGS := -Wno-uninitialized
  40   ifeq ($(DEBUG_LEVEL), release)
  41     # Need extra inlining to collapse all marking code into the hot marking loop
  42     BUILD_LIBJVM_shenandoahConcurrentMark.cpp_CXXFLAGS := --param inline-unit-growth=1000
  43     BUILD_LIBJVM_shenandoahTraversalGC.cpp_CXXFLAGS := --param inline-unit-growth=1000
  44   endif
  45 endif
  46 
  47 LIBJVM_FDLIBM_COPY_OPT_FLAG := $(CXX_O_FLAG_NONE)
  48 # If the FDLIBM_CFLAGS variable is non-empty we know
  49 # that the fdlibm-fork in hotspot can get optimized
  50 # by using -ffp-contract=off on GCC/Clang platforms.
  51 ifneq ($(FDLIBM_CFLAGS), )
  52   LIBJVM_FDLIBM_COPY_OPT_FLAG := $(CXX_O_FLAG_NORM)
  53 endif
  54 
  55 ifeq ($(OPENJDK_TARGET_OS), linux)
  56   BUILD_LIBJVM_ostream.cpp_CXXFLAGS := -D_FILE_OFFSET_BITS=64
  57   BUILD_LIBJVM_logFileOutput.cpp_CXXFLAGS := -D_FILE_OFFSET_BITS=64
  58 
  59   BUILD_LIBJVM_sharedRuntimeTrig.cpp_CXXFLAGS := -DNO_PCH $(FDLIBM_CFLAGS) $(LIBJVM_FDLIBM_COPY_OPT_FLAG)
  60   BUILD_LIBJVM_sharedRuntimeTrans.cpp_CXXFLAGS := -DNO_PCH $(FDLIBM_CFLAGS) $(LIBJVM_FDLIBM_COPY_OPT_FLAG)
  61 
  62   ifeq ($(TOOLCHAIN_TYPE), clang)
  63     JVM_PRECOMPILED_HEADER_EXCLUDE := \
  64         sharedRuntimeTrig.cpp \
  65         sharedRuntimeTrans.cpp \
  66         #
  67   endif
  68 
  69   ifeq ($(OPENJDK_TARGET_CPU), x86)
  70     # Performance measurements show that by compiling GC related code, we could
  71     # significantly reduce the GC pause time on 32 bit Linux/Unix platforms by
  72     # compiling without the PIC flag (-fPIC on linux).
  73     # See 6454213 for more details.
  74     ALL_SRC := $(filter %.cpp, $(call CacheFind, $(TOPDIR)/src/hotspot/share))
  75     NONPIC_FILTER := $(addsuffix %, $(addprefix $(TOPDIR)/src/hotspot/share/, \
  76         memory oops gc))
  77     # Due to what looks like a bug in the old build implementation of this, add a
  78     # couple of more files that were accidentally matched as substrings of GC related
  79     # files.
  80     NONPIC_SRC := $(filter $(NONPIC_FILTER), $(ALL_SRC)) globals.cpp location.cpp
  81     # Declare variables for each source file that needs the pic flag like this:
  82     # BUILD_JVM_<srcfile>_CXXFLAGS := -fno-PIC
  83     # This will get implicitly picked up by SetupNativeCompilation below.
  84     $(foreach s, $(NONPIC_SRC), $(eval BUILD_LIBJVM_$(notdir $s)_CXXFLAGS := -fno-PIC))
  85   endif
  86 
  87 else ifeq ($(OPENJDK_TARGET_OS), solaris)
  88   ifneq ($(DEBUG_LEVEL), slowdebug)
  89     # dev studio 12.6 workaround
  90     BUILD_LIBJVM_arguments.cpp_OPTIMIZATION := LOW
  91     # Workaround for a bug in dtrace.  If ciEnv::post_compiled_method_load_event()
  92     # is inlined, the resulting dtrace object file needs a reference to this
  93     # function, whose symbol name is too long for dtrace.  So disable inlining
  94     # for this method for now. (fix this when dtrace bug 6258412 is fixed)
  95     BUILD_LIBJVM_ciEnv.cpp_CXXFLAGS := \
  96         -xinline=no%__1cFciEnvbFpost_compiled_method_load_event6MpnHnmethod__v_
  97     # dtrace cannot handle tail call optimization (6672627, 6693876)
  98     BUILD_LIBJVM_jni.cpp_CXXFLAGS := -Qoption ube -O~yz
  99     BUILD_LIBJVM_stubGenerator_$(HOTSPOT_TARGET_CPU).cpp_CXXFLAGS := -xspace
 100 
 101     ifeq ($(OPENJDK_TARGET_CPU), x86_64)
 102       # Temporary until SS10 C++ compiler is fixed
 103       BUILD_LIBJVM_generateOptoStub.cpp_CXXFLAGS := -xO2
 104       # Temporary util SS12u1 C++ compiler is fixed
 105       BUILD_LIBJVM_c1_LinearScan.cpp_CXXFLAGS := -xO2
 106     endif
 107   endif
 108 
 109   # Need extra inlining to get oop_ps_push_contents functions to perform well enough.
 110   ifeq ($(DEBUG_LEVEL),release)
 111     BUILD_LIBJVM_psPromotionManager.cpp_CXXFLAGS := -W2,-Ainline:inc=1000
 112   endif
 113 
 114   ifeq ($(DEBUG_LEVEL), fastdebug)
 115     # this hangs in iropt now (7113504)
 116     BUILD_LIBJVM_compileBroker.cpp_CXXFLAGS := -xO2
 117 
 118     # Frame size > 100k  if we allow inlining via -g0!
 119     BUILD_LIBJVM_bytecodeInterpreter.cpp_CXXFLAGS := +d
 120     BUILD_LIBJVM_bytecodeInterpreterWithChecks.cpp_CXXFLAGS := +d
 121 
 122     ifeq ($(OPENJDK_TARGET_CPU_ARCH), x86)
 123       # ube explodes on x86
 124       BUILD_LIBJVM_bytecodeInterpreter.cpp_CXXFLAGS += -xO1
 125       BUILD_LIBJVM_bytecodeInterpreterWithChecks.cpp_CXXFLAGS += -xO1
 126     endif
 127 
 128   endif
 129 
 130   # Workaround for jvmciCompilerToVM.cpp long compilation time
 131   BUILD_LIBJVM_jvmciCompilerToVMInit.cpp_OPTIMIZATION := NONE
 132 
 133 else ifeq ($(OPENJDK_TARGET_OS), macosx)
 134   # The copied fdlibm routines in these files must not be optimized
 135   BUILD_LIBJVM_sharedRuntimeTrig.cpp_CXXFLAGS := $(FDLIBM_CFLAGS) $(LIBJVM_FDLIBM_COPY_OPT_FLAG)
 136   BUILD_LIBJVM_sharedRuntimeTrans.cpp_CXXFLAGS := $(FDLIBM_CFLAGS) $(LIBJVM_FDLIBM_COPY_OPT_FLAG)
 137   ifeq ($(TOOLCHAIN_TYPE), clang)
 138     # NOTE: The old build tested clang version to make sure this workaround
 139     # for the clang bug was still needed.
 140     BUILD_LIBJVM_loopTransform.cpp_CXXFLAGS := $(CXX_O_FLAG_NONE)
 141     ifneq ($(DEBUG_LEVEL), slowdebug)
 142       BUILD_LIBJVM_unsafe.cpp_CXXFLAGS := -O1
 143     endif
 144 
 145     # The following files are compiled at various optimization
 146     # levels due to optimization issues encountered at the
 147     # default level. The Clang compiler issues a compile
 148     # time error if there is an optimization level specification
 149     # skew between the PCH file and the C++ file.  Especially if the
 150     # PCH file is compiled at a higher optimization level than
 151     # the C++ file.  One solution might be to prepare extra optimization
 152     # level specific PCH files for the opt build and use them here, but
 153     # it's probably not worth the effort as long as only a few files
 154     # need this special handling.
 155     JVM_PRECOMPILED_HEADER_EXCLUDE := \
 156         sharedRuntimeTrig.cpp \
 157         sharedRuntimeTrans.cpp \
 158         loopTransform.cpp \
 159         unsafe.cpp \
 160         jvmciCompilerToVM.cpp \
 161         #
 162   endif
 163 
 164 else ifeq ($(OPENJDK_TARGET_OS), aix)
 165   BUILD_LIBJVM_synchronizer.cpp_CXXFLAGS := -qnoinline
 166   BUILD_LIBJVM_sharedRuntimeTrans.cpp_CXXFLAGS := $(CXX_O_FLAG_NONE)
 167   # Disable aggressive optimizations for functions in sharedRuntimeTrig.cpp
 168   # and sharedRuntimeTrans.cpp on ppc64.
 169   # -qstrict turns off the following optimizations:
 170   #   * Performing code motion and scheduling on computations such as loads
 171   #     and floating-point computations that may trigger an exception.
 172   #   * Relaxing conformance to IEEE rules.
 173   #   * Reassociating floating-point expressions.
 174   # When using '-qstrict' there still remains one problem
 175   # in javasoft.sqe.tests.api.java.lang.Math.sin5Tests when run in compile-all
 176   # mode, so don't optimize sharedRuntimeTrig.cpp at all.
 177   BUILD_LIBJVM_sharedRuntimeTrig.cpp_CXXFLAGS := $(CXX_O_FLAG_NONE)
 178 
 179   ifneq ($(DEBUG_LEVEL),slowdebug)
 180     # Compiling jvmtiEnterTrace.cpp with full optimization needs more than 30min
 181     # (mostly because of '-qhot=level=1' and the more than 1300 'log_trace' calls
 182     # which cause a lot of template expansion).
 183     BUILD_LIBJVM_jvmtiEnterTrace.cpp_OPTIMIZATION := LOW
 184   endif
 185 
 186   # Disable ELF decoder on AIX (AIX uses XCOFF).
 187   JVM_EXCLUDE_PATTERNS += elf
 188 
 189 else ifeq ($(OPENJDK_TARGET_OS), windows)
 190   JVM_PRECOMPILED_HEADER_EXCLUDE := \
 191       bytecodeInterpreter.cpp \
 192       bytecodeInterpreterWithChecks.cpp \
 193       opcodes.cpp \
 194       os_windows.cpp \
 195       os_windows_x86.cpp \
 196       osThread_windows.cpp \
 197       jvmciCompilerToVMInit.cpp \
 198       #
 199 
 200   # Workaround for jvmciCompilerToVM.cpp long compilation time
 201   BUILD_LIBJVM_jvmciCompilerToVMInit.cpp_OPTIMIZATION := NONE
 202 
 203 endif