RFR (XS) 8241500: FieldLayout/OldLayoutCheck.java fails in 32-bit VMs

[Aleksey Shipilev]

On 3/24/20 2:51 PM, David Holmes wrote:
> On 24/03/2020 11:19 pm, Frederic Parain wrote:
> I'm somewhat surprised that it has taken 4 weeks for this problem on 
> 32-bit to be noticed! :(

Nobody has time to look at auxiliary CIs in the midst of pandemic!

> A comment as to why INT_OFFSET and LONG_OFFSET have those values would 
> be good. Otherwise fix is fine by me too.

I'll do this:

+    // 32-bit VMs: @0:  8 byte header,  @8: long field, @16:  int field
+    // 64-bit VMs: @0: 12 byte header, @12:  int field, @16: long field
+    static final long INT_OFFSET  = Platform.is64bit() ? 12L : 16L;
+    static final long LONG_OFFSET = Platform.is64bit() ? 16L :  8L;

Reasonable?

-- 
Thanks,
-Aleksey