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comparison: src/share/vm/jfr/recorder/checkpoint/types/traceid/jfrTraceId.hpp

src/share/vm/jfr/recorder/checkpoint/types/traceid/jfrTraceId.hpp

changeset 9941
45c8de52649c
parent 9858
b985cbb00e68
equal deleted inserted replaced
9940:610401238989 9941:45c8de52649c
30 #include "memory/allocation.hpp" 30 #include "memory/allocation.hpp"
31 31
32 class ClassLoaderData; 32 class ClassLoaderData;
33 class Klass; 33 class Klass;
34 class Method; 34 class Method;
35 // XXX class PackageEntry;
36 class Thread; 35 class Thread;
37 36
38 /* 37 /*
39 * JfrTraceId is a means of tagging, e.g. marking, specific instances as being actively in-use. 38 * JfrTraceId is a means of tagging, e.g. marking, specific instances as being actively in-use.
40 * The most common situation is a committed event that has a field that is referring to a specific instance. 39 * The most common situation is a committed event that has a field that is referring to a specific instance.
52 * 51 *
53 * JfrTraceId(s) have been added to support tagging instances of classes such as: 52 * JfrTraceId(s) have been added to support tagging instances of classes such as:
54 * 53 *
55 * Klass (includes Method) 54 * Klass (includes Method)
56 * ClassLoaderData 55 * ClassLoaderData
57 * XXX PackageEntry
58 * 56 *
59 * These classes have been extended to include a _traceid field (64-bits). 57 * These classes have been extended to include a _traceid field (64-bits).
60 * 58 *
61 * Each instance is uniquely identified by a type-relative monotonic counter that is unique over the VM lifecycle. 59 * Each instance is uniquely identified by a type-relative monotonic counter that is unique over the VM lifecycle.
62 * "Tagging an instance" essentially means to set contextually determined (by epoch) marker bits in the _traceid field. 60 * "Tagging an instance" essentially means to set contextually determined (by epoch) marker bits in the _traceid field.
76 */ 74 */
77 75
78 class JfrTraceId : public AllStatic { 76 class JfrTraceId : public AllStatic {
79 public: 77 public:
80 static void assign(const Klass* klass); 78 static void assign(const Klass* klass);
81 // XXX static void assign(const PackageEntry* package);
82 static void assign(const ClassLoaderData* cld); 79 static void assign(const ClassLoaderData* cld);
83 static traceid assign_thread_id(); 80 static traceid assign_thread_id();
84 81
85 static traceid get(const Klass* klass); 82 static traceid get(const Klass* klass);
86 static traceid get(jclass jc); 83 static traceid get(jclass jc);
88 85
89 // tag construct as used, returns pre-tagged traceid 86 // tag construct as used, returns pre-tagged traceid
90 static traceid use(const Klass* klass, bool leakp = false); 87 static traceid use(const Klass* klass, bool leakp = false);
91 static traceid use(jclass jc, bool leakp = false); 88 static traceid use(jclass jc, bool leakp = false);
92 static traceid use(const Method* method, bool leakp = false); 89 static traceid use(const Method* method, bool leakp = false);
93 // XXX static traceid use(const PackageEntry* package, bool leakp = false);
94 static traceid use(const ClassLoaderData* cld, bool leakp = false); 90 static traceid use(const ClassLoaderData* cld, bool leakp = false);
95 91
96 static void remove(const Klass* klass); 92 static void remove(const Klass* klass);
97 static void restore(const Klass* klass); 93 static void restore(const Klass* klass);
98 94

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