Mercurial > hg > truffle
diff src/share/vm/memory/universe.cpp @ 14411:bdd155477289
8023033: PPC64 (part 13): basic changes for AIX
Summary: Added AIX includes alpha-sorted before BSD. Fix compilation issues with xlC in shared code. Basic shared platform dependend adaption (vm_version etc.).
Reviewed-by: kvn, dholmes, stefank
author | goetz |
---|---|
date | Thu, 22 Aug 2013 09:39:54 -0700 |
parents | 71180a6e5080 |
children | e2722a66aba7 |
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--- a/src/share/vm/memory/universe.cpp Fri Jul 26 00:59:18 2013 +0200 +++ b/src/share/vm/memory/universe.cpp Thu Aug 22 09:39:54 2013 -0700 @@ -747,7 +747,7 @@ // the correct no-access prefix. // The final value will be set in initialize_heap() below. Universe::set_narrow_oop_base((address)NarrowOopHeapMax); -#ifdef _WIN64 +#if defined(_WIN64) || defined(AIX) if (UseLargePages) { // Cannot allocate guard pages for implicit checks in indexed // addressing mode when large pages are specified on windows. @@ -825,6 +825,11 @@ // Can't reserve heap below 32Gb. // keep the Universe::narrow_oop_base() set in Universe::reserve_heap() Universe::set_narrow_oop_shift(LogMinObjAlignmentInBytes); +#ifdef AIX + // There is no protected page before the heap. This assures all oops + // are decoded so that NULL is preserved, so this page will not be accessed. + Universe::set_narrow_oop_use_implicit_null_checks(false); +#endif if (verbose) { tty->print(", %s: "PTR_FORMAT, narrow_oop_mode_to_string(HeapBasedNarrowOop),