JDK 9 RFR of JDK-8048620: Remove unneeded/obsolete -source/-target options in hotspot tests

[Joe Darcy]

Hello,

As a consequence of a policy for retiring old javac -source and -target 
options (JEP 182 [1]), in JDK 9, only -source/-target of 6/1.6 and 
higher will be supported [2]. This work is being tracked under bug

     JDK-8011044: Remove support for 1.5 and earlier source and target 
options
     https://bugs.openjdk.java.net/browse/JDK-8011044

Many subtasks related to this are already complete, including updating 
regression tests in the jdk and langtools repos. It has come to my 
attention that the hotspot repo also has a few tests that use -source 
and -target that should be updated. Please review the changes:

     http://cr.openjdk.java.net/~darcy/8048620.0/

Full patch below. From what I could tell looking at the bug and tests, 
these tests are not sensitive to the class file version so they 
shouldn't need to use an explicit -source or -target option and should 
just accept the JDK-default.

There is one additional test which uses -source/-target, 
test/compiler/6932496/Test6932496.java. This test *does* appear 
sensitive to class file version (no jsr / jret instruction in target 6 
or higher) so I have not modified this test. If the test is not actually 
sensitive to class file version, it can be updated like the others. If 
it is sensitive and if testing this is still relevant, the class file in 
question will need to be generated in some other way, such as as by 
using ASM.

Regardless of the outcome of the technical discussion around 
Test6932496.java, I'd appreciate if a "hotspot buddy" could shepherd 
this fix through the HotSpot processes.

Thanks,

-Joe

[1] http://openjdk.java.net/jeps/182

[2] http://mail.openjdk.java.net/pipermail/jdk9-dev/2014-January/000328.html

--- old/test/compiler/6775880/Test.java    2014-06-27 16:24:25.000000000 
-0700
+++ new/test/compiler/6775880/Test.java    2014-06-27 16:24:25.000000000 
-0700
@@ -26,7 +26,6 @@
   * @test
   * @bug 6775880
   * @summary EA +DeoptimizeALot: 
assert(mon_info->owner()->is_locked(),"object must be locked now")
- * @compile -source 1.4 -target 1.4 Test.java
   * @run main/othervm -XX:+IgnoreUnrecognizedVMOptions -Xbatch 
-XX:+DoEscapeAnalysis -XX:+DeoptimizeALot 
-XX:CompileCommand=exclude,java.lang.AbstractStringBuilder::append Test
   */

--- old/test/runtime/6626217/Test6626217.sh    2014-06-27 
16:24:26.000000000 -0700
+++ new/test/runtime/6626217/Test6626217.sh    2014-06-27 
16:24:26.000000000 -0700
@@ -54,7 +54,7 @@

  # Compile all the usual suspects, including the default 'many_loader'
  ${CP} many_loader1.java.foo many_loader.java
-${JAVAC} ${TESTJAVACOPTS} -source 1.4 -target 1.4 -Xlint *.java
+${JAVAC} ${TESTJAVACOPTS} -Xlint *.java

  # Rename the class files, so the custom loader (and not the system 
loader) will find it
  ${MV} from_loader2.class from_loader2.impl2
@@ -62,7 +62,7 @@
  # Compile the next version of 'many_loader'
  ${MV} many_loader.class many_loader.impl1
  ${CP} many_loader2.java.foo many_loader.java
-${JAVAC} ${TESTJAVACOPTS} -source 1.4 -target 1.4 -Xlint many_loader.java
+${JAVAC} ${TESTJAVACOPTS} -Xlint many_loader.java

  # Rename the class file, so the custom loader (and not the system 
loader) will find it
  ${MV} many_loader.class many_loader.impl2
--- old/test/runtime/8003720/Test8003720.java    2014-06-27 
16:24:26.000000000 -0700
+++ new/test/runtime/8003720/Test8003720.java    2014-06-27 
16:24:26.000000000 -0700
@@ -26,7 +26,7 @@
   * @test
   * @bug 8003720
   * @summary Method in interpreter stack frame can be deallocated
- * @compile -XDignore.symbol.file -source 1.7 -target 1.7 Victim.java
+ * @compile -XDignore.symbol.file Victim.java
   * @run main/othervm -Xverify:all -Xint Test8003720
   */