Mercurial > hg > truffle
diff src/share/vm/gc_implementation/parNew/asParNewGeneration.cpp @ 356:1ee8caae33af
Merge
author | tonyp |
---|---|
date | Thu, 21 Aug 2008 23:36:31 -0400 |
parents | 850fdf70db2b |
children | cff162798819 |
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--- a/src/share/vm/gc_implementation/parNew/asParNewGeneration.cpp Wed Aug 06 11:57:31 2008 -0400 +++ b/src/share/vm/gc_implementation/parNew/asParNewGeneration.cpp Thu Aug 21 23:36:31 2008 -0400 @@ -1,5 +1,5 @@ /* - * Copyright 2005-2006 Sun Microsystems, Inc. All Rights Reserved. + * Copyright 2005-2008 Sun Microsystems, Inc. All Rights Reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it @@ -162,10 +162,9 @@ // Grow the generation size_t change = desired_size - orig_size; assert(change % alignment == 0, "just checking"); - if (!virtual_space()->expand_by(change)) { + if (expand(change)) { return false; // Error if we fail to resize! } - size_changed = true; } else if (desired_size < orig_size) { size_t desired_change = orig_size - desired_size; @@ -222,7 +221,9 @@ // Was there a shrink of the survivor space? if (new_end < to()->end()) { MemRegion mr(to()->bottom(), new_end); - to()->initialize(mr, false /* clear */); + to()->initialize(mr, + SpaceDecorator::DontClear, + SpaceDecorator::DontMangle); } } } @@ -322,9 +323,7 @@ pointer_delta(from_start, eden_start, sizeof(char))); } -// tty->print_cr("eden_size before: " SIZE_FORMAT, eden_size); eden_size = align_size_down(eden_size, alignment); -// tty->print_cr("eden_size after: " SIZE_FORMAT, eden_size); eden_end = eden_start + eden_size; assert(eden_end >= eden_start, "addition overflowed") @@ -501,11 +500,31 @@ size_t old_from = from()->capacity(); size_t old_to = to()->capacity(); + // If not clearing the spaces, do some checking to verify that + // the spaces are already mangled. + + // Must check mangling before the spaces are reshaped. Otherwise, + // the bottom or end of one space may have moved into another + // a failure of the check may not correctly indicate which space + // is not properly mangled. + if (ZapUnusedHeapArea) { + HeapWord* limit = (HeapWord*) virtual_space()->high(); + eden()->check_mangled_unused_area(limit); + from()->check_mangled_unused_area(limit); + to()->check_mangled_unused_area(limit); + } + // The call to initialize NULL's the next compaction space - eden()->initialize(edenMR, true); + eden()->initialize(edenMR, + SpaceDecorator::Clear, + SpaceDecorator::DontMangle); eden()->set_next_compaction_space(from()); - to()->initialize(toMR , true); - from()->initialize(fromMR, false); // Note, not cleared! + to()->initialize(toMR , + SpaceDecorator::Clear, + SpaceDecorator::DontMangle); + from()->initialize(fromMR, + SpaceDecorator::DontClear, + SpaceDecorator::DontMangle); assert(from()->top() == old_from_top, "from top changed!");