RVM

Bad GC Map at O3 in VM_OptMachineCodeMap.generateMCInformation

Details

  • Type: Bug Bug
  • Status: Closed Closed
  • Priority: Major Major
  • Resolution: Won't Fix
  • Affects Version/s: None
  • Fix Version/s: None
  • Component/s: Compiler: Optimizing
  • Labels:
    None
  • Number of attachments :
    3

Description

The method VM_OptMachineCodeMap.generateMCInformation produces an invalid gc map at O3 level optimization.

To reproduce bug, change "test.configs" in build/test-runs/gcmap-sanity.properties so that it includes "gcstress_Opt_3" and re-run the tests via

ant -f test.xml -Dtest-run.name=gcmap-sanity

Tests will start failing with output like

validRef: TIB outside heap, ref = 0x9d800a24 tib = 0x00000000

Invalid ref reported while scanning stack

— METHOD (OPT)
Lorg/jikesrvm/compilers/opt/VM_OptMachineCodeMap;.generateMCInformation(Lorg/jikesrvm/compilers/opt/ir/OPT_GCIRMap;)Lorg/jikesrvm/compilers/opt/VM_OptMachineCodeMap;
— fp = 0x6b29fcc4 code base = 0x5b8c1ef4 code offset =0x00003243 0x6dc2fbf4:REF=0x9d800a24 TIB=0x00000000 STATUS=0x00000000 (INVALID TIB:CLASS NOT ACCESSIBLE)
...
Dumping stack starting at frame with bad ref:
– Stack –
Lorg/jikesrvm/compilers/opt/VM_OptMachineCodeMap;generateMCInformation(Lorg/jikesrvm/compilers/opt/ir/OPT_GCIRMap;)Lorg/jikesrvm/compilers/opt/VM_OptMachineCodeMap; at line 398
Lorg/jikesrvm/compilers/opt/VM_OptMachineCodeMap;create(Lorg/jikesrvm/compilers/opt/ir/OPT_IR;I)Lorg/jikesrvm/compilers/opt/VM_OptMachineCodeMap; at line 99
Lorg/jikesrvm/compilers/opt/VM_OptCompiledMethod;createFinalMCMap(Lorg/jikesrvm/compilers/opt/ir/OPT_IR;I)V at line 438

  1. Text File
    eclipse-output.txt
    03/Jun/07 12:59 AM
    10 kB
    Peter Donald
  2. Text File
    jBYTEmark-output.txt
    03/Jun/07 1:00 AM
    7 kB
    Peter Donald
  3. GZip Archive
    JLex.Main-trimmed.txt.gz
    03/Jun/07 1:00 AM
    1 kB
    Peter Donald

Activity

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Peter Donald added a comment -

Attached output from gcmap-sanity/gcstress_Opt_1/dacapo/eclipse as an example of problem

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Peter Donald added a comment - Attached output from gcmap-sanity/gcstress_Opt_1/dacapo/eclipse as an example of problem
Peter Donald made changes -
Field Original Value New Value
Attachment eclipse-output.txt [ 27755 ]
Peter Donald made changes -
Attachment JLex.Main-trimmed.txt.gz [ 27756 ]
Peter Donald made changes -
Attachment jBYTEmark-output.txt [ 27757 ]
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Peter Donald added a comment -

"[ 1488798 ] Leave SSA broken - lack of loop unrolling produces bad gcmap" http://sourceforge.net/tracker/index.php?func=detail&aid=1488798&group_id=128805&atid=712768) may be a duplicate of this bug but it is difficult to determine without further analysis

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Peter Donald added a comment - "[ 1488798 ] Leave SSA broken - lack of loop unrolling produces bad gcmap" http://sourceforge.net/tracker/index.php?func=detail&aid=1488798&group_id=128805&atid=712768 ) may be a duplicate of this bug but it is difficult to determine without further analysis
Peter Donald made changes -
Fix Version/s 2.9.2 [ 13599 ]
Fix Version/s 2.9.1 [ 13529 ]
David Grove made changes -
Fix Version/s 2.9.3 [ 13726 ]
Fix Version/s 2.9.2 [ 13599 ]
David Grove made changes -
Fix Version/s 2.9.4 [ 14162 ]
Fix Version/s 2.9.3 [ 13726 ]
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David Grove added a comment -

Bug report too old and with insufficient detail to be useful.

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David Grove added a comment - Bug report too old and with insufficient detail to be useful.
David Grove made changes -
Fix Version/s 2.9.4 [ 14162 ]
Resolution Won't Fix [ 2 ]
Status Open [ 1 ] Closed [ 6 ]

People

  • Assignee:
    Unassigned
    Reporter:
    Peter Donald
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Dates

  • Created:
    Updated:
    Resolved: