jdk8-mips64-public/hotspot: src/share/vm/oops/symbolOop.cpp@8012aa3ccede (annotated)

src/share/vm/oops/symbolOop.cpp@8012aa3ccede (annotated)

src/share/vm/oops/symbolOop.cpp

Thu, 13 Jan 2011 22:15:41 -0800

author: never
date: Thu, 13 Jan 2011 22:15:41 -0800
changeset 2462: 8012aa3ccede
parent 2314: f95d63e2154a
permissions: -rw-r--r--

4926272: methodOopDesc::method_from_bcp is unsafe
Reviewed-by: coleenp, jrose, kvn, dcubed

 /*
  * 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.
  *
  */
 #include "precompiled.hpp"
 #include "oops/oop.inline.hpp"
 #include "oops/symbolOop.hpp"
 // ------------------------------------------------------------------
 // symbolOopDesc::equals
 //
 // Compares the symbol with a string of the given length.
 bool symbolOopDesc::equals(const char* str, int len) const {
   int l = utf8_length();
   if (l != len) return false;
   while (l-- > 0) {
     if (str[l] != (char) byte_at(l))
       return false;
   }
   assert(l == -1, "we should be at the beginning");
   return true;
 }
 // ------------------------------------------------------------------
 // symbolOopDesc::starts_with
 //
 // Tests if the symbol starts with the specified prefix of the given
 // length.
 bool symbolOopDesc::starts_with(const char* prefix, int len) const {
   if (len > utf8_length()) return false;
   while (len-- > 0) {
     if (prefix[len] != (char) byte_at(len))
       return false;
   }
   assert(len == -1, "we should be at the beginning");
   return true;
 }
 // ------------------------------------------------------------------
 // symbolOopDesc::index_of
 //
 // Finds if the given string is a substring of this symbol's utf8 bytes.
 // Return -1 on failure.  Otherwise return the first index where str occurs.
 int symbolOopDesc::index_of_at(int i, const char* str, int len) const {
   assert(i >= 0 && i <= utf8_length(), "oob");
   if (len <= 0)  return 0;
   char first_char = str[0];
   address bytes = (address) ((symbolOopDesc*)this)->base();
   address limit = bytes + utf8_length() - len;  // inclusive limit
   address scan = bytes + i;
   if (scan > limit)
     return -1;
   for (;;) {
     scan = (address) memchr(scan, first_char, (limit + 1 - scan));
     if (scan == NULL)
       return -1;  // not found
     assert(scan >= bytes+i && scan <= limit, "scan oob");
     if (memcmp(scan, str, len) == 0)
       return (int)(scan - bytes);
   }
 }
 char* symbolOopDesc::as_C_string(char* buf, int size) const {
   if (size > 0) {
     int len = MIN2(size - 1, utf8_length());
     for (int i = 0; i < len; i++) {
       buf[i] = byte_at(i);
     }
     buf[len] = '\0';
   }
   return buf;
 }
 char* symbolOopDesc::as_C_string() const {
   int len = utf8_length();
   char* str = NEW_RESOURCE_ARRAY(char, len + 1);
   return as_C_string(str, len + 1);
 }
 char* symbolOopDesc::as_C_string_flexible_buffer(Thread* t,
                                                  char* buf, int size) const {
   char* str;
   int len = utf8_length();
   int buf_len = len + 1;
   if (size < buf_len) {
     str = NEW_RESOURCE_ARRAY(char, buf_len);
   } else {
     str = buf;
   }
   return as_C_string(str, buf_len);
 }
 void symbolOopDesc::print_symbol_on(outputStream* st) {
   st = st ? st : tty;
   int length = UTF8::unicode_length((const char*)bytes(), utf8_length());
   const char *ptr = (const char *)bytes();
   jchar value;
   for (int index = 0; index < length; index++) {
     ptr = UTF8::next(ptr, &value);
     if (value >= 32 && value < 127 || value == '\'' || value == '\\') {
       st->put(value);
     } else {
       st->print("\\u%04x", value);
     }
   }
 }
 jchar* symbolOopDesc::as_unicode(int& length) const {
   symbolOopDesc* this_ptr = (symbolOopDesc*)this;
   length = UTF8::unicode_length((char*)this_ptr->bytes(), utf8_length());
   jchar* result = NEW_RESOURCE_ARRAY(jchar, length);
   if (length > 0) {
     UTF8::convert_to_unicode((char*)this_ptr->bytes(), result, length);
   }
   return result;
 }
 const char* symbolOopDesc::as_klass_external_name(char* buf, int size) const {
   if (size > 0) {
     char* str    = as_C_string(buf, size);
     int   length = (int)strlen(str);
     // Turn all '/'s into '.'s (also for array klasses)
     for (int index = 0; index < length; index++) {
       if (str[index] == '/') {
         str[index] = '.';
       }
     }
     return str;
   } else {
     return buf;
   }
 }
 const char* symbolOopDesc::as_klass_external_name() const {
   char* str    = as_C_string();
   int   length = (int)strlen(str);
   // Turn all '/'s into '.'s (also for array klasses)
   for (int index = 0; index < length; index++) {
     if (str[index] == '/') {
       str[index] = '.';
     }
   }
   return str;
 }

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src/share/vm/oops/symbolOop.cpp@8012aa3ccede (annotated)

src/share/vm/oops/symbolOop.cpp