26 #define SHARE_VM_CLASSFILE_STRINGTABLE_HPP
27
28 #include "memory/allocation.inline.hpp"
29 #include "utilities/hashtable.hpp"
30
31 template <class T, class N> class CompactHashtable;
32 class CompactStringTableWriter;
33 class FileMapInfo;
34 class SerializeClosure;
35
36 class StringTable : public RehashableHashtable<oop, mtSymbol> {
37 friend class VMStructs;
38 friend class Symbol;
39
40 private:
41 // The string table
42 static StringTable* _the_table;
43
44 // Shared string table
45 static CompactHashtable<oop, char> _shared_table;
46 static bool _ignore_shared_strings;
47
48 // Set if one bucket is out of balance due to hash algorithm deficiency
49 static bool _needs_rehashing;
50
51 // Claimed high water mark for parallel chunked scanning
52 static volatile int _parallel_claimed_idx;
53
54 static oop intern(Handle string_or_null, jchar* chars, int length, TRAPS);
55 oop basic_add(int index, Handle string_or_null, jchar* name, int len,
56 unsigned int hashValue, TRAPS);
57
58 oop lookup_in_main_table(int index, jchar* chars, int length, unsigned int hashValue);
59 static oop lookup_shared(jchar* name, int len, unsigned int hash);
60
61 // Apply the give oop closure to the entries to the buckets
62 // in the range [start_idx, end_idx).
63 static void buckets_oops_do(OopClosure* f, int start_idx, int end_idx);
64
65 typedef StringTable::BucketUnlinkContext BucketUnlinkContext;
66 // Unlink or apply the give oop closure to the entries to the buckets
140 _verify_quietly = 0,
141 _verify_with_mesgs = 1
142 };
143
144 enum VerifyRetTypes {
145 _verify_pass = 0,
146 _verify_fail_continue = 1,
147 _verify_fail_done = 2
148 };
149
150 static VerifyRetTypes compare_entries(int bkt1, int e_cnt1,
151 HashtableEntry<oop, mtSymbol>* e_ptr1,
152 int bkt2, int e_cnt2,
153 HashtableEntry<oop, mtSymbol>* e_ptr2);
154 static VerifyRetTypes verify_entry(int bkt, int e_cnt,
155 HashtableEntry<oop, mtSymbol>* e_ptr,
156 VerifyMesgModes mesg_mode);
157 static int verify_and_compare_entries();
158
159 // Sharing
160 static void ignore_shared_strings(bool v) { _ignore_shared_strings = v; }
161 static bool shared_string_ignored() { return _ignore_shared_strings; }
162 static void shared_oops_do(OopClosure* f);
163 static bool copy_shared_string(GrowableArray<MemRegion> *string_space,
164 CompactStringTableWriter* ch_table);
165 static void write_to_archive(GrowableArray<MemRegion> *string_space);
166 static void serialize(SerializeClosure* soc);
167
168 // Rehash the symbol table if it gets out of balance
169 static void rehash_table();
170 static bool needs_rehashing() { return _needs_rehashing; }
171
172 // Parallel chunked scanning
173 static void clear_parallel_claimed_index() { _parallel_claimed_idx = 0; }
174 static int parallel_claimed_index() { return _parallel_claimed_idx; }
175 };
176 #endif // SHARE_VM_CLASSFILE_STRINGTABLE_HPP
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26 #define SHARE_VM_CLASSFILE_STRINGTABLE_HPP
27
28 #include "memory/allocation.inline.hpp"
29 #include "utilities/hashtable.hpp"
30
31 template <class T, class N> class CompactHashtable;
32 class CompactStringTableWriter;
33 class FileMapInfo;
34 class SerializeClosure;
35
36 class StringTable : public RehashableHashtable<oop, mtSymbol> {
37 friend class VMStructs;
38 friend class Symbol;
39
40 private:
41 // The string table
42 static StringTable* _the_table;
43
44 // Shared string table
45 static CompactHashtable<oop, char> _shared_table;
46 static bool _shared_string_mapped;
47
48 // Set if one bucket is out of balance due to hash algorithm deficiency
49 static bool _needs_rehashing;
50
51 // Claimed high water mark for parallel chunked scanning
52 static volatile int _parallel_claimed_idx;
53
54 static oop intern(Handle string_or_null, jchar* chars, int length, TRAPS);
55 oop basic_add(int index, Handle string_or_null, jchar* name, int len,
56 unsigned int hashValue, TRAPS);
57
58 oop lookup_in_main_table(int index, jchar* chars, int length, unsigned int hashValue);
59 static oop lookup_shared(jchar* name, int len, unsigned int hash);
60
61 // Apply the give oop closure to the entries to the buckets
62 // in the range [start_idx, end_idx).
63 static void buckets_oops_do(OopClosure* f, int start_idx, int end_idx);
64
65 typedef StringTable::BucketUnlinkContext BucketUnlinkContext;
66 // Unlink or apply the give oop closure to the entries to the buckets
140 _verify_quietly = 0,
141 _verify_with_mesgs = 1
142 };
143
144 enum VerifyRetTypes {
145 _verify_pass = 0,
146 _verify_fail_continue = 1,
147 _verify_fail_done = 2
148 };
149
150 static VerifyRetTypes compare_entries(int bkt1, int e_cnt1,
151 HashtableEntry<oop, mtSymbol>* e_ptr1,
152 int bkt2, int e_cnt2,
153 HashtableEntry<oop, mtSymbol>* e_ptr2);
154 static VerifyRetTypes verify_entry(int bkt, int e_cnt,
155 HashtableEntry<oop, mtSymbol>* e_ptr,
156 VerifyMesgModes mesg_mode);
157 static int verify_and_compare_entries();
158
159 // Sharing
160 static void set_shared_string_mapped() { _shared_string_mapped = true; }
161 static bool shared_string_mapped() { return _shared_string_mapped; }
162 static void shared_oops_do(OopClosure* f) NOT_CDS_JAVA_HEAP_RETURN;
163 static bool copy_shared_string(GrowableArray<MemRegion> *string_space,
164 CompactStringTableWriter* ch_table) NOT_CDS_JAVA_HEAP_RETURN_(false);
165 static oop archive_string(oop s, Thread* THREAD) NOT_CDS_JAVA_HEAP_RETURN_(NULL);
166 static void write_to_archive(GrowableArray<MemRegion> *string_space) NOT_CDS_JAVA_HEAP_RETURN;
167 static void serialize(SerializeClosure* soc) NOT_CDS_JAVA_HEAP_RETURN;
168
169 // Rehash the symbol table if it gets out of balance
170 static void rehash_table();
171 static bool needs_rehashing() { return _needs_rehashing; }
172
173 // Parallel chunked scanning
174 static void clear_parallel_claimed_index() { _parallel_claimed_idx = 0; }
175 static int parallel_claimed_index() { return _parallel_claimed_idx; }
176 };
177 #endif // SHARE_VM_CLASSFILE_STRINGTABLE_HPP
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