RFR: 8325567: jspawnhelper without args fails with segfault [v4]

[Elif Aslan]

> This change is intended to address the segmentation fault issue that occurs when jspawnhelper is called without arguments, and it includes an updated test to verify the behavior in such cases.
> 
> Existing tests passes since it does not check behavior without args.
> After test update the test fails without 
> 
>    if (argc != 2) {
>         shutItDown();
>     }
> 
> code block
> 
>> Test results: failed: 1
>> Report written to /home/ec2-user/moe/ws/openjdk/jdk/build/linux-x86_64-server-fastdebug/test-results/jtreg_test_jdk_java_lang_ProcessBuilder_JspawnhelperProtocol_java/html/report.html
>> Results written to /home/ec2-user/moe/ws/openjdk/jdk/build/linux-x86_64-server-fastdebug/test-support/jtreg_test_jdk_java_lang_ProcessBuilder_JspawnhelperProtocol_java
>> Error: Some tests failed or other problems occurred.
>> Finished running test 'jtreg:test/jdk/java/lang/ProcessBuilder/JspawnhelperProtocol.java'
>> Test report is stored in build/linux-x86_64-server-fastdebug/test-results/jtreg_test_jdk_java_lang_ProcessBuilder_JspawnhelperProtocol_java
>>  
>> ==============================
>> Test summary
>> ==============================
>>    TEST                                              TOTAL  PASS  FAIL ERROR   
>>    jtreg:test/jdk/java/lang/ProcessBuilder/JspawnhelperProtocol.java
>> >>                                                       1     0     1     0 <<
>> ==============================
>> TEST FAILURE
> 
> 
> 
> after added the code block back 
> 
>    if (argc != 2) {
>         shutItDown();
>     }
> 
> 
> updated test passes
> 
> 
> lang/ProcessBuilder/JspawnhelperProtocol.d:/home/ec2-user/moe/ws/openjdk/jdk/test/jdk/java/lang/ProcessBuilder:/home/ec2-user/moe/ws/openjdk/jdk/build/linux-x86_64-server-fastdebug/test-support/jtreg_test_jdk_java_lang_ProcessBuilder_JspawnhelperProtocol_java/classes/0/test/lib \\
>         -Xmx768m \\
>         -XX:MaxRAMPercentage=1.04167 \\
>         -Dtest.boot.jdk=/home/ec2-user/moe/soft/jdk/jdk-21 \\
>         -Djava.io.tmpdir=/home/ec2-user/moe/ws/openjdk/jdk/build/linux-x86_64-server-fastdebug/test-support/jtreg_test_jdk_java_lang_ProcessBuilder_JspawnhelperProtocol_java/tmp \\
>         -ea \\
>         -esa \\
>         -Djava.library.path=/home/ec2-user/moe/ws/openjdk/jdk/build/linux-x86_64-server-fastdebug/images/test/jdk/jtreg/native \\
>         com.sun.javatest.regtest.agent.MainWrapper /home/ec2-user/moe/ws/openjdk/jdk/build/linux-x86_64-server-fastdebug/test-support/jtreg_test_jdk_java_lang_ProcessBuilder_JspawnhelperProtocol_java/java/lang/ProcessBuilder/JspawnhelperPr...

Elif Aslan has updated the pull request incrementally with one additional commit since the last revision:

  Revert JspawnhelperProtocol.java

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/18112/files
  - new: https://git.openjdk.org/jdk/pull/18112/files/8fbf24e2..ef803b4c

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18112&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18112&range=02-03

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/18112.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18112/head:pull/18112

PR: https://git.openjdk.org/jdk/pull/18112