#
# Copyright (c) 2018, 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
# under the terms of the GNU General Public License version 2 only, as
# published by the Free Software Foundation.  Oracle designates this
# particular file as subject to the "Classpath" exception as provided
# by Oracle in the LICENSE file that accompanied this code.
#
# This code is distributed in the hope that it will be useful, but WITHOUT
# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
# FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
# version 2 for more details (a copy is included in the LICENSE file that
# accompanied this code).
#
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# This must be the first rule
default: all

include $(SPEC)
include MakeBase.gmk
include JavaCompilation.gmk
include SetupJavaCompilers.gmk

ifeq ($(JMH_CORE_JAR), )
  $(info Error: JMH is missing. Please use configure --with-jmh.)
  $(error Cannot continue)
endif

#### Variables

MICROBENCHMARK_SRC := $(TOPDIR)/test/micro
MICROBENCHMARK_JAR := $(IMAGES_OUTPUTDIR)/test/micro/microbenchmarks.jar

MICROBENCHMARK_OUTPUT := $(SUPPORT_OUTPUTDIR)/test/micro
MICROBENCHMARK_CLASSES := $(MICROBENCHMARK_OUTPUT)/classes

JMH_UNPACKED_DIR := $(MICROBENCHMARK_OUTPUT)/jmh_jars
JMH_UNPACKED_JARS_DONE := $(JMH_UNPACKED_DIR)/_unpacked.marker

# External dependencies
JMH_COMPILE_JARS := $(JMH_CORE_JAR) $(JMH_GENERATOR_JAR)
JMH_RUNTIME_JARS := $(JMH_CORE_JAR) $(JMH_COMMONS_MATH_JAR) $(JMH_JOPT_SIMPLE_JAR)

MICROBENCHMARK_CLASSPATH := $(call PathList, $(JMH_COMPILE_JARS))

###

# Need double \n to get new lines and no trailing spaces
MICROBENCHMARK_MANIFEST := Build: $(FULL_VERSION)\n\
\nJMH-Version: $(JMH_VERSION)\n\
\nName: OpenJDK Microbenchmark Suite


#### Compile Targets

# Building microbenchmark requires the jdk.unsupported and java.management modules,
# and to have sjavac disabled.
$(eval $(call SetupJavaCompiler, MICROBENCHMARK_JAVA_COMPILER, \
    JVM := $(JAVA_SMALL) --add-modules jdk.unsupported --limit-modules java.management, \
    JAVAC := $(NEW_JAVAC), \
    DISABLE_SJAVAC := true, \
    FLAGS := --upgrade-module-path $(JDK_OUTPUTDIR)/modules --system none $(DISABLE_WARNINGS), \
    SERVER_DIR := $(SJAVAC_SERVER_DIR), \
    SERVER_JVM := $(SJAVAC_SERVER_JAVA), \
))

# Build microbenchmark suite for the current JDK
$(eval $(call SetupJavaCompilation, BUILD_JDK_MICROBENCHMARK, \
    SETUP := MICROBENCHMARK_JAVA_COMPILER, \
    ADD_JAVAC_FLAGS := -cp $(MICROBENCHMARK_CLASSPATH) -Xlint -Werror, \
    SRC := $(MICROBENCHMARK_SRC), \
    BIN := $(MICROBENCHMARK_CLASSES), \
))

$(BUILD_JDK_MICROBENCHMARK): $(JMH_COMPILE_JARS)

# Unpacking dependencies for inclusion in the benchmark JARs
$(JMH_UNPACKED_JARS_DONE): $(JMH_RUNTIME_JARS)
	$(RM) -r $(JMH_UNPACKED_DIR)
	$(MKDIR) -p $(JMH_UNPACKED_DIR)
	$(foreach jar, $(JMH_RUNTIME_JARS), \
            $$($(UNZIP) -oq $(jar) -d $(JMH_UNPACKED_DIR)))
	$(RM) -r $(JMH_UNPACKED_DIR)/META-INF
	$(RM) $(JMH_UNPACKED_DIR)/*.xml
	$(TOUCH) $@

# Create benchmarks JAR file with benchmarks for both the old and new JDK
$(eval $(call SetupJarArchive, BUILD_JDK_JAR, \
    DEPENDENCIES := $(BUILD_JDK_MICROBENCHMARK) $(JMH_UNPACKED_JARS_DONE), \
    SRCS := $(MICROBENCHMARK_CLASSES) $(JMH_UNPACKED_DIR) , \
    SUFFIXES := .*, \
    EXCLUDE_FILES:= _the.BUILD_JDK_MICROBENCHMARK_batch \
        _the.BUILD_JDK_MICROBENCHMARK.vardeps _unpacked.marker, \
    EXTRA_MANIFEST_ATTR := $(MICROBENCHMARK_MANIFEST), \
    JARMAIN := org.openjdk.jmh.Main, \
    JAR := $(MICROBENCHMARK_JAR), \
))

all: $(MICROBENCHMARK_JAR)

.PHONY: all