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  1. JDK
  2. JDK-8238851

Shenandoah: C1: Resolve into registers of correct type

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    Details

    • Subcomponent:
      gc
    • Resolved In Build:
      b10
    • Verification:
      Verified

      Backports

        Description


        Take recent jdk/jdk, apply this patch:

        diff -r b585d773ea0f src/hotspot/cpu/x86/c1_LIRAssembler_x86.cpp
        --- a/src/hotspot/cpu/x86/c1_LIRAssembler_x86.cpp Mon Feb 10 06:18:46 2020 +0100
        +++ b/src/hotspot/cpu/x86/c1_LIRAssembler_x86.cpp Tue Feb 11 09:32:11 2020 +0100
        @@ -852,11 +852,11 @@
               return;
             }
         #endif
             assert(src->is_single_cpu(), "must match");
             if (src->type() == T_OBJECT) {
        - __ verify_oop(src->as_register());
        + __ verify_oop(src->as_register(), "reg2reg 1");
             }
             move_regs(src->as_register(), dest->as_register());
         
           } else if (dest->is_double_cpu()) {
         #ifdef _LP64

        ...then run this in any folder (Maven project is not required!):

        $ export JAVA_HOME=...
        $ export PATH=$JAVA_HOME/bin:$PATH
        $ MAVEN_OPTS="-XX:+UnlockExperimentalVMOptions -XX:+UnlockDiagnosticVMOptions -XX:+UseShenandoahGC -XX:+VerifyOops" mvn verify

        # A fatal error has been detected by the Java Runtime Environment:
        #
        # Internal Error (/home/shade/trunks/jdk-jdk/src/hotspot/cpu/x86/macroAssembler_x86.cpp:883), pid=13783, tid=13799
        # fatal error: DEBUG MESSAGE: verify_oop: rax: reg2reg 1
        #

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                Assignee:
                rkennke Roman Kennke
                Reporter:
                shade Aleksey Shipilev
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                  Created:
                  Updated:
                  Resolved: