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6687581: Make CMS work with compressed oops

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Make FreeChunk read markword instead of LSB in _klass pointer to indicate that it's a FreeChunk for compressed oops.

Reviewed-by: ysr, jmasa
This commit is contained in:
Coleen Phillimore 2008-06-09 11:51:19 -04:00
parent 4cce21039e
commit a2d6036a4d
13 changed files with 315 additions and 160 deletions
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2
hotspot/src/share/vm/runtime/arguments.cpp
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@ -1174,7 +1174,7 @@ void Arguments::set_ergonomics_flags() {
// field offset to determine free list chunk markers.
// Check that UseCompressedOops can be set with the max heap size allocated
// by ergonomics.
if (!UseConcMarkSweepGC && MaxHeapSize <= max_heap_for_compressed_oops()) {
if (MaxHeapSize <= max_heap_for_compressed_oops()) {
if (FLAG_IS_DEFAULT(UseCompressedOops)) {
// Leave compressed oops off by default. Uncomment
// the following line to return it to default status.