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diff src/cpu/x86/vm/templateTable_x86_64.cpp @ 167:feeb96a45707

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6696264: assert("narrow oop can never be zero") for GCBasher & ParNewGC Summary: decouple set_klass() with zeroing the gap when compressed. Reviewed-by: kvn, ysr, jrose
author coleenp
date Wed, 28 May 2008 21:06:24 -0700
parents ba764ed4b6f2
children d1605aabd0a1 6aae2f9d0294
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line diff
--- a/src/cpu/x86/vm/templateTable_x86_64.cpp	Wed May 28 12:42:34 2008 -0700
+++ b/src/cpu/x86/vm/templateTable_x86_64.cpp	Wed May 28 21:06:24 2008 -0700
@@ -3163,7 +3163,9 @@
       __ movptr(Address(rax, oopDesc::mark_offset_in_bytes()),
                (intptr_t) markOopDesc::prototype()); // header (address 0x1)
     }
-    __ store_klass(rax, rsi);  // klass
+    __ xorl(rcx, rcx); // use zero reg to clear memory (shorter code)
+    __ store_klass_gap(rax, rcx);  // zero klass gap for compressed oops
+    __ store_klass(rax, rsi);      // store klass last
     __ jmp(done);
   }