RFR 8081770 [TESTBUG] regression Test7107135 needs to remove dependence on locally installed gcc

[Gerald Thornbrugh]

Hi Chris,
> Hi Jerry,
>
> Thanks for taking care of this. As Calvin pointed out in the other 
> review, you should be using "hg rename".
>
> Otherwise overall your changes look fine, but I'm a little uncertain 
> about one aspect of your changes, and if it might impact the nature of 
> the testing. The shell script used LD_LIBRARY_PATH to make the jni 
> libraries locatable. Your java version uses -Djava.library.path. I 
> think this is probably ok, but just want to point it out and make sure.
When the build process builds the native libraries it places them in 
"java.library.path".  The old script
built the native library itself and placed it in "LD_LIBRARY_PATH". The 
difference is just where the
native library is placed after it is built.

Thanks for the review.

Jerry
>
> thanks,
>
> Chris
>
> On 5/3/16 2:54 PM, Gerald Thornbrugh wrote:
>> Hi Everyone,
>>
>> I would like to have the following change reviewed:
>>
>> Bug: https://bugs.openjdk.java.net/browse/JDK-8081770
>> Webrev: http://cr.openjdk.java.net/~gthornbr/8081770/webrev.00/ 
>> <http://cr.openjdk.java.net/%7Egthornbr/8081770/webrev.00/>
>>
>> JPRT testing completed without errors and I verified that the test 
>> was run.
>>
>>
>> The changes consist of:
>>
>> Renaming the test directory from "7107135" to "execstack".
>>
>> Replacing the existing Test7107135.sh script file with a java test 
>> source file Testexecstack.java.
>>
>> Adding the new test directory to the "BUILD_HOTSPOT_JTREG_NATIVE_SRC" 
>> list for Linux builds
>> so the native libtest-rw.c and libtest-rwx.c source files would be 
>> compiled into native libraries.
>>
>> Renaming the existing test.c native source file to libtest-rw.c and 
>> libtest-rwx.c so the build process
>> would identify the file as a native library source file and build the 
>> libraries.
>>
>> Adding native source file specific LDFLAGS so the source files could 
>> be built with "-z noexecstack"
>> and "-z execstack".
>>
>> To get the build process to create a "noexecstack" native library and 
>> an "execstack" native library
>> the existing test.c native library source was placed in two separate 
>> files (libtest-rw.c and libtest-rwx.c).
>> This was done so that different LDFLAGS could be specified per file.
>>
>> Please let me know if you have any questions or concerns.
>>
>> Thanks,
>>
>> Jerry
>