[Arm64] COMPlus_gcServer=1 fails

[sdmaclea]

I only ran one test, but it failed. (Passes when gcServer=0)

$ corerun JIT/Directed/nullabletypes/Desktop/boxunboxvaluetype_do/boxunboxvaluetype_do.exe 
--- char? s = Helper.Create(default(char)) ---
--- char? s = null ---

Assert failure(PID 1041 [0x00000411], Thread: 1041 [0x0411]): (dac_cast<TADDR>(m_pMethTab) & MARKED_BIT) == 0
    File: src/vm/object.h Line: 242
    Image: /home/sdmaclea/coreoverlay/corerun

Aborted

Relevant section of the backtrace

dotnet/coreclr#9  0x0000ffffb7409d40 in Object::GetMethodTable (this=<optimized out>)
     at src/vm/object.h:242
dotnet/coreclr#10 PtrArray::GetArrayElementTypeHandle (this=0xfff03000b298) 
    at src/vm/object.h:916
dotnet/coreclr#11 JIT_Stelem_Ref_Portable (array=0xfff03000b298, idx=0, val=0xfff03001e018)
    at src/vm/jithelpers.cpp

[sdmaclea]

@Maoni0 @swgillespie @jkotas @dotnet/arm64-contrib

Looks like maybe the issue is that JIT_Stelem_Ref_Portable is not compatible with gcServer=1

[jkotas]

JIT_Stelem_Ref_Portable is not compatible with gcServer=1

I do not think so. This looks like a GC heap corruption that happened earlier, and the assert in JIT_Stelem_Ref_Portable just happened to catch it.

[sdmaclea]

@jkotas I will investigate further

[Maoni0]

yeah, those 2 are orthogonal.