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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
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* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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#ifndef SHARE_JFR_LEAKPROFILER_CHAINS_EDGESTORE_HPP
#define SHARE_JFR_LEAKPROFILER_CHAINS_EDGESTORE_HPP
#include "jfr/leakprofiler/chains/edge.hpp"
#include "jfr/leakprofiler/utilities/unifiedOopRef.hpp"
#include "jfr/utilities/jfrHashtable.hpp"
#include "memory/allocation.hpp"
typedef u8 traceid;
class StoredEdge : public Edge {
private:
mutable traceid _gc_root_id;
size_t _skip_length;
public:
StoredEdge();
StoredEdge(const Edge* parent, UnifiedOopRef reference);
StoredEdge(const Edge& edge);
StoredEdge(const StoredEdge& edge);
traceid gc_root_id() const { return _gc_root_id; }
void set_gc_root_id(traceid root_id) const { _gc_root_id = root_id; }
bool is_skip_edge() const { return _skip_length != 0; }
size_t skip_length() const { return _skip_length; }
void set_skip_length(size_t length) { _skip_length = length; }
void set_parent(const Edge* edge) { this->_parent = edge; }
StoredEdge* parent() const {
return const_cast<StoredEdge*>(static_cast<const StoredEdge*>(Edge::parent()));
}
};
class EdgeStore : public CHeapObj<mtTracing> {
typedef HashTableHost<StoredEdge, traceid, JfrHashtableEntry, EdgeStore> EdgeHashTable;
typedef EdgeHashTable::HashEntry EdgeEntry;
template <typename,
typename,
template<typename, typename> class,
typename,
size_t>
friend class HashTableHost;
friend class EventEmitter;
friend class ObjectSampleWriter;
friend class ObjectSampleCheckpoint;
private:
static traceid _edge_id_counter;
EdgeHashTable* _edges;
// Hash table callbacks
void on_link(EdgeEntry* entry);
bool on_equals(uintptr_t hash, const EdgeEntry* entry);
void on_unlink(EdgeEntry* entry);
StoredEdge* get(UnifiedOopRef reference) const;
StoredEdge* put(UnifiedOopRef reference);
traceid gc_root_id(const Edge* edge) const;
bool put_edges(StoredEdge** previous, const Edge** current, size_t length);
bool put_skip_edge(StoredEdge** previous, const Edge** current, size_t distance_to_root);
void put_chain_epilogue(StoredEdge* leak_context_edge, const Edge* root) const;
StoredEdge* associate_leak_context_with_candidate(const Edge* edge);
void store_gc_root_id_in_leak_context_edge(StoredEdge* leak_context_edge, const Edge* root) const;
StoredEdge* link_new_edge(StoredEdge** previous, const Edge** current);
/**代码未完, 请加载全部代码(NowJava.com).**/