RFR(XS): [TESTBUG] Fix runtime/StackGuardPages/testme.sh to deal with 64k pages. (original) (raw)

Lindenmaier, Goetz goetz.lindenmaier at sap.com
Mon Apr 27 07:24:54 UTC 2015

Hi David,

that's just because of the stack size computation in os_linux.cpp. It uses Linux::page_size, which is 64K, and Linux::vm_default_page_size(), which is 8K. Red/Yellow/Shadow pages are all set to 1.

I already fixed a lot of jtreg tests wrt. the initial stack size.

Best regards, Goetz.

oJ/8077838-ppc-hs-comp> output-jdk9-fastdebug/images/jdk/bin/java -Xss320K The stack size specified is too small, Specify at least 328k Error: Could not create the Java Virtual Machine. Error: A fatal exception has occurred. Program will exit.

-----Original Message----- From: David Holmes [mailto:david.holmes at oracle.com] Sent: Montag, 27. April 2015 02:38 To: Lindenmaier, Goetz; hotspot-dev at openjdk.java.net Subject: Re: RFR(XS): [TESTBUG] Fix runtime/StackGuardPages/testme.sh to deal with 64k pages.

Hi Goetz,

On 24/04/2015 7:08 PM, Lindenmaier, Goetz wrote:

Hi,

runtime/StackGuardPages/testme.sh fails on OSes with default 64K pages. This happens on ppc linux distributions. The test passes -Xss320k to the VM. Fix: increase to -Xss328K.

Why does the test fail? I would have expected a stack size that is a multiple of possible page sizes (up to 64K) to be okay.

Thanks, David

Please review this change of a single character ;) I please need a sponsor. http://cr.openjdk.java.net/~goetz/webrevs/8078595-64Kpages/webrev.01/

Best regards, Goetz.

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