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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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8
hotspot/src/share/vm/gc_implementation/concurrentMarkSweep/freeChunk.cpp
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@ -47,15 +47,15 @@ void FreeChunk::mangleAllocated(size_t size) {
Copy::fill_to_words(addr + hdr, size - hdr, baadbabeHeapWord);
}
void FreeChunk::mangleFreed(size_t size) {
void FreeChunk::mangleFreed(size_t sz) {
assert(baadbabeHeapWord != deadbeefHeapWord, "Need distinct patterns");
// mangle all but the header of a just-freed block of storage
// just prior to passing it to the storage dictionary
assert(size >= MinChunkSize, "smallest size of object");
assert(size == _size, "just checking");
assert(sz >= MinChunkSize, "smallest size of object");
assert(sz == size(), "just checking");
HeapWord* addr = (HeapWord*)this;
size_t hdr = header_size();
Copy::fill_to_words(addr + hdr, size - hdr, deadbeefHeapWord);
Copy::fill_to_words(addr + hdr, sz - hdr, deadbeefHeapWord);
}
void FreeChunk::verifyList() const {