Mon, 13 Oct 2014 16:09:57 -0700
8061651: Interface to the Lookup Index Cache to improve URLClassPath search time
Summary: Implemented the interface in sun.misc.URLClassPath and corresponding JVM_XXX APIs
Reviewed-by: mchung, acorn, jiangli, dholmes
1 /*
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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5 * This code is free software; you can redistribute it and/or modify it
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13 * accompanied this code).
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25 #ifndef SHARE_VM_MEMORY_METADATAFACTORY_HPP
26 #define SHARE_VM_MEMORY_METADATAFACTORY_HPP
28 #include "classfile/classLoaderData.hpp"
29 #include "utilities/array.hpp"
30 #include "utilities/exceptions.hpp"
31 #include "utilities/globalDefinitions.hpp"
33 class MetadataFactory : AllStatic {
34 public:
35 template <typename T>
36 static Array<T>* new_array(ClassLoaderData* loader_data, int length, TRAPS) {
37 // The "true" argument is because all metadata arrays are read only when
38 // dumped to the shared archive
39 return new (loader_data, length, /*read_only*/true, THREAD) Array<T>(length);
40 }
42 template <typename T>
43 static Array<T>* new_array(ClassLoaderData* loader_data, int length, T value, TRAPS) {
44 Array<T>* array = new_array<T>(loader_data, length, CHECK_NULL);
45 for (int i = 0; i < length; i++) {
46 array->at_put(i, value);
47 }
48 return array;
49 }
51 template <typename T>
52 static Array<T>* new_writeable_array(ClassLoaderData* loader_data, int length, TRAPS) {
53 return new (loader_data, length, /*read_only*/false, THREAD) Array<T>(length);
54 }
56 template <typename T>
57 static Array<T>* new_writeable_array(ClassLoaderData* loader_data, int length, T value, TRAPS) {
58 Array<T>* array = new_writeable_array<T>(loader_data, length, CHECK_NULL);
59 for (int i = 0; i < length; i++) {
60 array->at_put(i, value);
61 }
62 return array;
63 }
65 template <typename T>
66 static void free_array(ClassLoaderData* loader_data, Array<T>* data) {
67 if (DumpSharedSpaces) {
68 // FIXME: the freeing code is buggy, especially when PrintSharedSpaces is enabled.
69 // Disable for now -- this means if you specify bad classes in your classlist you
70 // may have wasted space inside the archive.
71 return;
72 }
73 if (data != NULL) {
74 assert(loader_data != NULL, "shouldn't pass null");
75 assert(!data->is_shared(), "cannot deallocate array in shared spaces");
76 int size = data->size();
77 if (DumpSharedSpaces) {
78 loader_data->ro_metaspace()->deallocate((MetaWord*)data, size, false);
79 } else {
80 loader_data->metaspace_non_null()->deallocate((MetaWord*)data, size, false);
81 }
82 }
83 }
85 // Deallocation method for metadata
86 template <class T>
87 static void free_metadata(ClassLoaderData* loader_data, T md) {
88 if (DumpSharedSpaces) {
89 // FIXME: the freeing code is buggy, especially when PrintSharedSpaces is enabled.
90 // Disable for now -- this means if you specify bad classes in your classlist you
91 // may have wasted space inside the archive.
92 return;
93 }
94 if (md != NULL) {
95 assert(loader_data != NULL, "shouldn't pass null");
96 int size = md->size();
97 // Call metadata's deallocate function which will call deallocate fields
98 assert(!DumpSharedSpaces, "cannot deallocate metadata when dumping CDS archive");
99 assert(!md->on_stack(), "can't deallocate things on stack");
100 assert(!md->is_shared(), "cannot deallocate if in shared spaces");
101 md->deallocate_contents(loader_data);
102 loader_data->metaspace_non_null()->deallocate((MetaWord*)md, size, md->is_klass());
103 }
104 }
105 };
107 #endif // SHARE_VM_MEMORY_METADATAFACTORY_HPP