#!/bin/sh

###########################################################################################

# This is a helper script to evaluate nashorn with optimistic types

# it produces a flight recording for every run, and uses the best 

# known flags for performance for the current configration

###########################################################################################

# Flags to instrument lambdaform computation, caching, interpretation and compilation

# Default compile threshold for lambdaforms is 30

#FLAGS="-Djava.lang.invoke.MethodHandle.COMPILE_THRESHOLD=3 -Djava.lang.invoke.MethodHandle.DUMP_CLASS_FILES=true -Djava.lang.invoke.MethodHandle.TRACE_METHOD_LINKAGE=true -Djava.lang.invoke.MethodHandle.TRACE_INTERPRETER=true"

# Flags to run trusted tests from the Nashorn test suite

#FLAGS="-Djava.security.manager -Djava.security.policy=../build/nashorn.policy -Dnashorn.debug"

# Unique timestamped file name for JFR recordings. For JFR, we also have to

# crank up the stack cutoff depth to 1024, because of ridiculously long lambda form

# stack traces.

#

# It is also recommended that you go into $JAVA_HOME/jre/lib/jfr/default.jfc and

# set the "method-sampling-interval" Normal and Maximum sample time as low as you

# can go (10 ms on most platforms). The default is normally higher. The increased

# sampling overhead is usually negligible for Nashorn runs, but the data is better

JFR_FILENAME="./nashorn_$(date|sed "s/ /_/g"|sed "s/:/_/g").jfr"

# Directory where to look for nashorn.jar in a dist folder. The default is "..", assuming

# that we run the script from the make dir

DIR=..

NASHORN_JAR=$DIR/dist/nashorn.jar

# The built Nashorn jar is placed first in the bootclasspath to override the JDK

# nashorn.jar in $JAVA_HOME/jre/lib/ext. Thus, we also need -esa, as assertions in

# nashorn count as system assertions in this configuration

# Type profiling default level is 111, 222 adds some compile time, but is faster

$JAVA_HOME/bin/java \

$FLAGS \

-ea \

-esa \

-Xbootclasspath/p:$NASHORN_JAR \

-Xms2G -Xmx2G \

-XX:+UnlockCommercialFeatures \

-XX:+FlightRecorder \

-XX:FlightRecorderOptions=defaultrecording=true,disk=true,dumponexit=true,dumponexitpath=$JFR_FILENAME,stackdepth=1024 \

-XX:TypeProfileLevel=222 \

-cp $CLASSPATH:../build/test/classes/ \

jdk.nashorn.tools.Shell ${@}

# Below are flags that may come in handy, but aren't used for default runs

# Type specialization and math intrinsic replacement should be enabled by default in 8u20 and nine,

# keeping this flag around for experimental reasons. Replace + with - to switch it off

#-XX:+UseTypeSpeculation \

# Same with math intrinsics. They should be enabled by default in 8u20 and 9

#-XX:+UseMathExactIntrinsics \

# Add -Dnashorn.time to time the compilation phases.

#-Dnashorn.time \

# Add ShowHiddenFrames to get lambda form internals on the stack traces

#-XX:+ShowHiddenFrames \

# Add print optoassembly to get an asm dump. This requires 1) a debug build, not product,

# That tired compilation is switched off, for C2 only output and that the number of

# compiler threads is set to 1 for determinsm.

#-XX:+PrintOptoAssembly -XX:-TieredCompilation -XX:CICompilerCount=1 \