[7u60] Request for approval for 8017498: JVM crashes when native code calls sigaction(sig) where sig>=0x20

[Chan, Sunny]

Hi all,

This is a request to backport a jdk8 fix into jdk7u60, along with subsequent changes to the regression tests:

8017498 : JVM crashes when native code calls sigaction(sig) where sig>=0x20
https://bugs.openjdk.java.net/browse/JDK-8017498

The current jsig implementation is unable to deal with sigaction request if signumber is > 32. The patch modifies the signal handler so that signal > 32, which is not used in the JVM, to ignore and install the handler request directly.

This fix is already included in jdk8's hotspot as:
http://hg.openjdk.java.net/hsx/hotspot-rt/hotspot/rev/732af649bc3a

The discussion thread for Java 8 can be found here:
http://mail.openjdk.java.net/pipermail/hotspot-runtime-dev/2013-July/008031.html

Notice that current the regression tests that Calvin has provided has a few issues and this has been fixed in the following subsequent updates:

Bug fix 1 (native code failed to compile on some platform, 8020791):
http://hg.openjdk.java.net/jdk8/jdk8/hotspot/rev/72727c4b6dec
http://mail.openjdk.java.net/pipermail/hotspot-runtime-dev/2013-July/008312.html 

Bug fix 2 (failed to find gcc, 8021296):
http://hg.openjdk.java.net/jdk8/jdk8/hotspot/rev/f9ee986a9fea 
http://mail.openjdk.java.net/pipermail/hotspot-runtime-dev/2013-July/008421.html 

I have verified that if you applied the original bug fix and then subsequent testbug fix to the JDK 7 branch, it applies cleanly and resolved the issues.

Thanks.

Sunny Chan, Executive Director, Technology
Goldman Sachs (Asia) L.L.C. | 68th Floor | Cheung Kong Center | 2 Queens Road Central | Hong Kong
email:  sunny.chan at gs.com | Tel: +852 2978 6481 | Fax: +852 2978 0633

This message may contain information that is confidential or privileged.  If you are not the intended recipient, please advise the sender immediately and delete this message.  See http://www.gs.com/disclaimer/email for further information on confidentiality and the risks inherent in electronic communication.