jdk8-mips64-public/hotspot: src/share/vm/classfile/symbolTable.hpp@ef3c5db0b3ae (annotated)

src/share/vm/classfile/symbolTable.hpp@ef3c5db0b3ae (annotated)

src/share/vm/classfile/symbolTable.hpp

Tue, 21 Dec 2010 04:37:30 -0800

author: twisti
date: Tue, 21 Dec 2010 04:37:30 -0800
changeset 2408: ef3c5db0b3ae
parent 2314: f95d63e2154a
child 2497: 3582bf76420e
permissions: -rw-r--r--

7008165: Garbage in ClassFormatError message
Summary: When bootstrap_method_ref in BootstrapMethods attribute points to a wrong CP entry (non-MethodHandle), JVM throws ClassFormatError with a message, where method index and class file name is garbage.
Reviewed-by: iveresov

 /*
  * Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * 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).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #ifndef SHARE_VM_CLASSFILE_SYMBOLTABLE_HPP
 #define SHARE_VM_CLASSFILE_SYMBOLTABLE_HPP
 #include "memory/allocation.inline.hpp"
 #include "oops/symbolOop.hpp"
 #include "utilities/hashtable.hpp"
 // The symbol table holds all symbolOops and corresponding interned strings.
 // symbolOops and literal strings should be canonicalized.
 //
 // The interned strings are created lazily.
 //
 // It is implemented as an open hash table with a fixed number of buckets.
 //
 // %note:
 //  - symbolTableEntrys are allocated in blocks to reduce the space overhead.
 class BoolObjectClosure;
 class SymbolTable : public Hashtable {
   friend class VMStructs;
 private:
   // The symbol table
   static SymbolTable* _the_table;
   // Adding elements
   symbolOop basic_add(int index, u1* name, int len,
                       unsigned int hashValue, TRAPS);
   bool basic_add(constantPoolHandle cp, int names_count,
                  const char** names, int* lengths, int* cp_indices,
                  unsigned int* hashValues, TRAPS);
   // Table size
   enum {
     symbol_table_size = 20011
   };
   symbolOop lookup(int index, const char* name, int len, unsigned int hash);
   SymbolTable()
     : Hashtable(symbol_table_size, sizeof (HashtableEntry)) {}
   SymbolTable(HashtableBucket* t, int number_of_entries)
     : Hashtable(symbol_table_size, sizeof (HashtableEntry), t,
                 number_of_entries) {}
 public:
   enum {
     symbol_alloc_batch_size = 8
   };
   // The symbol table
   static SymbolTable* the_table() { return _the_table; }
   static void create_table() {
     assert(_the_table == NULL, "One symbol table allowed.");
     _the_table = new SymbolTable();
   }
   static void create_table(HashtableBucket* t, int length,
                            int number_of_entries) {
     assert(_the_table == NULL, "One symbol table allowed.");
     assert(length == symbol_table_size * sizeof(HashtableBucket),
            "bad shared symbol size.");
     _the_table = new SymbolTable(t, number_of_entries);
   }
   static symbolOop lookup(const char* name, int len, TRAPS);
   // lookup only, won't add. Also calculate hash.
   static symbolOop lookup_only(const char* name, int len, unsigned int& hash);
   // Only copy to C string to be added if lookup failed.
   static symbolOop lookup(symbolHandle sym, int begin, int end, TRAPS);
   // jchar (utf16) version of lookups
   static symbolOop lookup_unicode(const jchar* name, int len, TRAPS);
   static symbolOop lookup_only_unicode(const jchar* name, int len, unsigned int& hash);
   static void add(constantPoolHandle cp, int names_count,
                   const char** names, int* lengths, int* cp_indices,
                   unsigned int* hashValues, TRAPS);
   // GC support
   //   Delete pointers to otherwise-unreachable objects.
   static void unlink(BoolObjectClosure* cl) {
     the_table()->Hashtable::unlink(cl);
   }
   // Invoke "f->do_oop" on the locations of all oops in the table.
   static void oops_do(OopClosure* f) {
     the_table()->Hashtable::oops_do(f);
   }
   // Symbol lookup
   static symbolOop lookup(int index, const char* name, int len, TRAPS);
   // Needed for preloading classes in signatures when compiling.
   // Returns the symbol is already present in symbol table, otherwise
   // NULL.  NO ALLOCATION IS GUARANTEED!
   static symbolOop probe(const char* name, int len) {
     unsigned int ignore_hash;
     return lookup_only(name, len, ignore_hash);
   }
   static symbolOop probe_unicode(const jchar* name, int len) {
     unsigned int ignore_hash;
     return lookup_only_unicode(name, len, ignore_hash);
   }
   // Histogram
   static void print_histogram()     PRODUCT_RETURN;
   // Debugging
   static void verify();
   // Sharing
   static void copy_buckets(char** top, char*end) {
     the_table()->Hashtable::copy_buckets(top, end);
   }
   static void copy_table(char** top, char*end) {
     the_table()->Hashtable::copy_table(top, end);
   }
   static void reverse(void* boundary = NULL) {
     ((Hashtable*)the_table())->reverse(boundary);
   }
 };
 class StringTable : public Hashtable {
   friend class VMStructs;
 private:
   // The string table
   static StringTable* _the_table;
   static oop intern(Handle string_or_null, jchar* chars, int length, TRAPS);
   oop basic_add(int index, Handle string_or_null, jchar* name, int len,
                 unsigned int hashValue, TRAPS);
   // Table size
   enum {
     string_table_size = 1009
   };
   oop lookup(int index, jchar* chars, int length, unsigned int hashValue);
   StringTable() : Hashtable(string_table_size, sizeof (HashtableEntry)) {}
   StringTable(HashtableBucket* t, int number_of_entries)
     : Hashtable(string_table_size, sizeof (HashtableEntry), t,
                 number_of_entries) {}
 public:
   // The string table
   static StringTable* the_table() { return _the_table; }
   static void create_table() {
     assert(_the_table == NULL, "One string table allowed.");
     _the_table = new StringTable();
   }
   static void create_table(HashtableBucket* t, int length,
                            int number_of_entries) {
     assert(_the_table == NULL, "One string table allowed.");
     assert(length == string_table_size * sizeof(HashtableBucket),
            "bad shared string size.");
     _the_table = new StringTable(t, number_of_entries);
   }
   static int hash_string(jchar* s, int len);
   // GC support
   //   Delete pointers to otherwise-unreachable objects.
   static void unlink(BoolObjectClosure* cl) {
     the_table()->Hashtable::unlink(cl);
   }
   // Invoke "f->do_oop" on the locations of all oops in the table.
   static void oops_do(OopClosure* f) {
     the_table()->Hashtable::oops_do(f);
   }
   // Probing
   static oop lookup(symbolOop symbol);
   // Interning
   static oop intern(symbolOop symbol, TRAPS);
   static oop intern(oop string, TRAPS);
   static oop intern(const char *utf8_string, TRAPS);
   // Debugging
   static void verify();
   // Sharing
   static void copy_buckets(char** top, char*end) {
     the_table()->Hashtable::copy_buckets(top, end);
   }
   static void copy_table(char** top, char*end) {
     the_table()->Hashtable::copy_table(top, end);
   }
   static void reverse() {
     ((BasicHashtable*)the_table())->reverse();
   }
 };
 #endif // SHARE_VM_CLASSFILE_SYMBOLTABLE_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/classfile/symbolTable.hpp@ef3c5db0b3ae (annotated)

src/share/vm/classfile/symbolTable.hpp