Review Request: 8204648: test/jdk/tools/launchers/SourceMode.java fails with long shebang line

[mandy chung]

JDK-8204588 [1] fixed the test failure caused by long paths to the Java 
launcher in some test execution environments, causing the shebang line 
to overflow the underlying system limit of 128 characters.

The test needs a small tweak to the max javaCmd length to reduce from 
100 to 90 since the arguments passed to java command are more than 28 
characters.  This is a quick fix for the test failure.  A better fix
would be to compute the length of the entire shebang line in each test 
case and determine if it should be skipped.  That can be done as a 
follow up fix.

diff --git a/test/jdk/tools/launcher/SourceMode.java 
b/test/jdk/tools/launcher/SourceMode.java
--- a/test/jdk/tools/launcher/SourceMode.java
+++ b/test/jdk/tools/launcher/SourceMode.java
@@ -71,7 +71,7 @@
              // limit of 120 characters for a shebang line.
              Path p = cwd.relativize(cmd);
              shortJavaCmd = (p.toString().length() < 
cmd.toString().length()) ? p : cmd;
-            skipShebangTest = shortJavaCmd.toString().length() > 100;
+            skipShebangTest = shortJavaCmd.toString().length() > 90;
          }

          log = System.err;

thanks
Mandy
[1] 
http://mail.openjdk.java.net/pipermail/core-libs-dev/2018-June/053700.html