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8049421: G1 Class Unloading after completing a concurrent mark cycle

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Co-authored-by: Mikael Gerdin <mikael.gerdin@oracle.com>
Reviewed-by: tschatzl, ehelin, brutisso, coleenp, roland, iveresov
This commit is contained in:
Stefan Karlsson 2014-07-07 10:12:40 +02:00
parent ef1e9b3c80
commit 1b001a2afd
75 changed files with 2169 additions and 874 deletions
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42
hotspot/src/share/vm/memory/genCollectedHeap.hpp
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@ -78,9 +78,9 @@ public:
unsigned int _full_collections_completed;
// Data structure for claiming the (potentially) parallel tasks in
// (gen-specific) strong roots processing.
SubTasksDone* _gen_process_strong_tasks;
SubTasksDone* gen_process_strong_tasks() { return _gen_process_strong_tasks; }
// (gen-specific) roots processing.
SubTasksDone* _gen_process_roots_tasks;
SubTasksDone* gen_process_roots_tasks() { return _gen_process_roots_tasks; }
// In block contents verification, the number of header words to skip
NOT_PRODUCT(static size_t _skip_header_HeapWords;)
@ -403,18 +403,30 @@ public:
// The "so" argument determines which of the roots
// the closure is applied to:
// "SO_None" does none;
// "SO_AllClasses" applies the closure to all entries in the SystemDictionary;
// "SO_SystemClasses" to all the "system" classes and loaders;
// "SO_Strings" applies the closure to all entries in the StringTable.
void gen_process_strong_roots(int level,
bool younger_gens_as_roots,
// The remaining arguments are in an order
// consistent with SharedHeap::process_strong_roots:
bool activate_scope,
SharedHeap::ScanningOption so,
OopsInGenClosure* not_older_gens,
OopsInGenClosure* older_gens,
KlassClosure* klass_closure);
private:
void gen_process_roots(int level,
bool younger_gens_as_roots,
bool activate_scope,
SharedHeap::ScanningOption so,
OopsInGenClosure* not_older_gens,
OopsInGenClosure* weak_roots,
OopsInGenClosure* older_gens,
CLDClosure* cld_closure,
CLDClosure* weak_cld_closure,
CodeBlobClosure* code_closure);
public:
static const bool StrongAndWeakRoots = false;
static const bool StrongRootsOnly = true;
void gen_process_roots(int level,
bool younger_gens_as_roots,
bool activate_scope,
SharedHeap::ScanningOption so,
bool only_strong_roots,
OopsInGenClosure* not_older_gens,
OopsInGenClosure* older_gens,
CLDClosure* cld_closure);
// Apply "root_closure" to all the weak roots of the system.
// These include JNI weak roots, string table,