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  2. JDK-8023816

dtrace test crashes with SIGBUS in generated code

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    • svc

      dtrace/hotspot/DynamicProbes/DynamicProbes01 crashes with SIGBUS in generated code on Sparc v9.

      # A fatal error has been detected by the Java Runtime Environment:
      #
      # SIGBUS (0xa) at pc=0xffffffff6027fe8c, pid=28376, tid=2
      #
      # JRE version: Java(TM) SE Runtime Environment (8.0-b102) (build 1.8.0-ea-b102)
      # Java VM: Java HotSpot(TM) 64-Bit Server VM (25.0-b44 compiled mode solaris-sparc compressed oops)
      # Problematic frame:
      # J java.util.concurrent.ConcurrentHashMap.transfer([Ljava/util/concurrent/ConcurrentHashMap$Node;[Ljava/util/concurrent/ConcurrentHashMap$Node;)V @ 0xffffffff6027fe8c [0xffffffff6027e0e0+7596]
      #
      # Core dump written. Default location: /export/local/aurora/sandbox/results/ResultDir/DynamicProbes01/core or core.28376

      The generated code in question is

      Instructions: (pc=0xffffffff6027fe8c)
      0xffffffff6027fe6c: 01 00 00 00 01 00 00 00 01 00 00 00 01 00 00 00
      0xffffffff6027fe7c: 01 00 00 00 94 02 a0 40 90 10 00 02 92 10 00 0a
      0xffffffff6027fe8c: d4 73 aa 23 a4 10 00 02 47 76 03 80 01 00 00 00
      0xffffffff6027fe9c: 84 10 00 12 11 21 74 97 90 1a 3c 00 01 00 00 00
      ;; ffffffff6027fe7c 01 00 00 00 nop
      ;; ffffffff6027fe80 94 02 a0 40 add %o2, 0x40, %o2
      ;; ffffffff6027fe84 90 10 00 02 mov %g2, %o0
      ;; ffffffff6027fe88 92 10 00 0a mov %o2, %o1
      ;; ---------------
      ;; ffffffff6027fe8c d4 73 aa 23 stx %o2, [ %sp + 0xa23 ]
      ;; ffffffff6027fe90 a4 10 00 02 mov %g2, %l2
      ;; ffffffff6027fe94 47 76 03 80 call 0xffffffff7e000c94
      ;; ffffffff6027fe98 01 00 00 00 nop
      ;; ffffffff6027fe9c 84 10 00 12 mov %l2, %g2
      ;; ffffffff6027fea0 11 21 74 97 sethi %hi(0x85d25c00), %o0
      ;; ffffffff6027fea4 90 1a 3c 00 xor %o0, -1024, %o0
      ;; ffffffff6027fea8 01 00 00 00 nop

      I'm not sure about the alignment requirements on Sparc v9, but as long as %sp is aligned (which it is right now, sp=0xffffffff7b4fbc20), it shouldn't be possible that %sp + 0xa23 is aligned. The question is whether it is the compiler that screwed up, if dtrace messed the code up or something else.

            jbachorik Jaroslav BachorĂ­k
            miauno Mikael Auno (Inactive)
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              Created:
              Updated:
              Resolved: