Request for Review(S): JVM crashes when throwing StackOverflow exception from interpreter

[Wang, Yang]

Wrong list, sorry. Please ignore it. (it was resent to hotspot-compiler-dev)
Yang

From: Wang, Yang
Sent: Mittwoch, 16. November 2011 17:29
To: 'compiler-dev at openjdk.java.net'
Subject: Request for Review(S): JVM crashes when throwing StackOverflow exception from interpreter

Hi folks,
   We found two problems during throwing an StackOverflow exception from interpreter.

1.       Before preparing to throw a StackOverflow exception, the last Java frame is set to the current sp. This is problematic when the StackOverflow is thrown on top of c2i adapter. Solution : the real caller frame(unextended sp) should be set as last Java frame.

2.       When Garbage collection happens during throwing StackOverflow exception, and callee-saved register(or "never-saved" register which behaves alike) happens to be an OOP, GC is unable to locate the OOP in C frame(generated by VM calls), and hence fails to process the OOP. Solution : We build a runtime stub frame before doing a VM call, which guarantees the location of Callee-saved registers are always recognizable by GC.
   Detailed descriptions and tests could be found in webrev  http://www.sapjvm.com/yw/webrevs/StackOverflow_GC_Crash/
   I don't have a bugID yet. Please kindly open one bug for this issue.

Thanks,
Yang

Yang Wang
Software Engineer
TIP Core AS&VM Technology (AG)
SAP JVM JIT Compiler
SAP AG
Dietmar-Hopp-Allee 16
69190 Walldorf, Germany
T +49 6227 7-50320
F +49 6227 78-48541
Email : yang02.wang at sap.com
www.sap.com

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