[jira] Created: (RVM-862) 2 static fields using an identic slot
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[jira] Created: (RVM-862) 2 static fields using an identic slot
by JIRA jira@codehaus.org
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2 static fields using an identic slot
------------------------------------- Key: RVM-862 URL: http://jira.codehaus.org/browse/RVM-862 Project: RVM Issue Type: Bug Components: Runtime: Object Model Affects Versions: 3.1.0 Reporter: Thomas Preud'homme Priority: Minor Attachments: static_field_with_same_slot.patch It seems to me that 2 static fields could use a same slot if a 4 bytes static field is allocated after an 16 bytes static field if nextNumericSlot isn't 8 bytes aligned before the 16 bytes static field is allocated. See lines 324 to 332 of rvm/src/org/jikesrvm/runtime/Statics.java It looks like a copy paste of the else code path (request for a 8 bytes static field allocation at line 346) occurs for commit 15244, which is perfectly correct in the else block as nextNumericSlot + 2 gives the slot with the higher id of the 3 slots reserved and leave the 2 slots with lower id .for use by the 8 bytes static field. For me line 331 should be replaced by numericSlotHole = nextNumericSlot + 4; -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://jira.codehaus.org/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira ------------------------------------------------------------------------------ Come build with us! The BlackBerry(R) Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9 - 12, 2009. Register now! http://p.sf.net/sfu/devconference _______________________________________________ Jikesrvm-issues mailing list Jikesrvm-issues@... https://lists.sourceforge.net/lists/listinfo/jikesrvm-issues |
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[jira] Commented: (RVM-862) 2 static fields using an identic slot
by JIRA jira@codehaus.org
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[ http://jira.codehaus.org/browse/RVM-862?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=194421#action_194421 ] Ian Rogers commented on RVM-862: -------------------------------- Agreed. > 2 static fields using an identic slot > ------------------------------------- > > Key: RVM-862 > URL: http://jira.codehaus.org/browse/RVM-862 > Project: RVM > Issue Type: Bug > Components: Runtime: Object Model > Affects Versions: 3.1.0 > Reporter: Thomas Preud'homme > Priority: Minor > Attachments: static_field_with_same_slot.patch > > Original Estimate: 5 minutes > Remaining Estimate: 5 minutes > > It seems to me that 2 static fields could use a same slot if a 4 bytes static field is allocated after an 16 bytes static field if nextNumericSlot isn't 8 bytes aligned before the 16 bytes static field is allocated. See lines 324 to 332 of rvm/src/org/jikesrvm/runtime/Statics.java > It looks like a copy paste of the else code path (request for a 8 bytes static field allocation at line 346) occurs for commit 15244, which is perfectly correct in the else block as nextNumericSlot + 2 gives the slot with the higher id of the 3 slots reserved and leave the 2 slots with lower id .for use by the 8 bytes static field. > For me line 331 should be replaced by numericSlotHole = nextNumericSlot + 4; -- This message is automatically generated by JIRA. - If you think it was sent incorrectly contact one of the administrators: http://jira.codehaus.org/secure/Administrators.jspa - For more information on JIRA, see: http://www.atlassian.com/software/jira ------------------------------------------------------------------------------ Come build with us! The BlackBerry(R) Developer Conference in SF, CA is the only developer event you need to attend this year. Jumpstart your developing skills, take BlackBerry mobile applications to market and stay ahead of the curve. Join us from November 9 - 12, 2009. Register now! http://p.sf.net/sfu/devconference _______________________________________________ Jikesrvm-issues mailing list Jikesrvm-issues@... https://lists.sourceforge.net/lists/listinfo/jikesrvm-issues |
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