RFR: 8369147: Various issues with new tests added by JDK-8316694

[Richard Reingruber]

On Tue, 14 Oct 2025 23:44:39 GMT, Chad Rakoczy <duke at openjdk.org> wrote:

> The following occurs when running DeoptimizeRelocatedNMethod on PPC64
> 
> ```
> #  Internal Error (jdk/src/hotspot/cpu/ppc/nativeInst_ppc.cpp:405)
> #  assert(!decode(i1, i2)) failed: already patched
> 
> Native frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)
> V  [libjvm.so+0x1701784]  NativePostCallNop::patch(int, int)+0xf4  (nativeInst_ppc.cpp:405)
> V  [libjvm.so+0x1718414]  nmethod::finalize_relocations()+0x6f4  (nmethod.cpp:2059)
> V  [libjvm.so+0x171891c]  nmethod::post_init()+0x5c  (nmethod.cpp:1252)
> V  [libjvm.so+0x171a8dc]  nmethod::relocate(CodeBlobType)+0x1ec  (nmethod.cpp:1515)
> V  [libjvm.so+0x200b598]  WB_RelocateNMethodFromMethod+0x388  (whitebox.cpp:1653)
> j  jdk.test.whitebox.WhiteBox.relocateNMethodFromMethod0(Ljava/lang/reflect/Executable;I)V+0
> j  jdk.test.whitebox.WhiteBox.relocateNMethodFromMethod(Ljava/lang/reflect/Executable;I)V+8
> j  compiler.whitebox.DeoptimizeRelocatedNMethod.main([Ljava/lang/String;)V+50
> ```
> 
> @TheRealMDoerr @reinrich Do you have any ideas on a solution for this? I don't have any experience working with PPC so guidance would be greatly appreciated

It's fixed with https://bugs.openjdk.org/browse/JDK-8369257

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PR Comment: https://git.openjdk.org/jdk/pull/27659#issuecomment-3404874700