6711316: Open source the Garbage-First garbage collector
Summary: First mercurial integration of the code for the Garbage-First garbage collector.
Reviewed-by: apetrusenko, iveresov, jmasa, sgoldman, tonyp, ysr
/*
* Copyright 1997-2000 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
* CA 95054 USA or visit www.sun.com if you need additional information or
* have any questions.
*
*/
# include "incls/_precompiled.incl"
# include "incls/_fieldType.cpp.incl"
void FieldType::skip_optional_size(symbolOop signature, int* index) {
jchar c = signature->byte_at(*index);
while (c >= '0' && c <= '9') {
*index = *index + 1;
c = signature->byte_at(*index);
}
}
BasicType FieldType::basic_type(symbolOop signature) {
return char2type(signature->byte_at(0));
}
// Check if it is a valid array signature
bool FieldType::is_valid_array_signature(symbolOop sig) {
assert(sig->utf8_length() > 1, "this should already have been checked");
assert(sig->byte_at(0) == '[', "this should already have been checked");
// The first character is already checked
int i = 1;
int len = sig->utf8_length();
// First skip all '['s
while(i < len - 1 && sig->byte_at(i) == '[') i++;
// Check type
switch(sig->byte_at(i)) {
case 'B': // T_BYTE
case 'C': // T_CHAR
case 'D': // T_DOUBLE
case 'F': // T_FLOAT
case 'I': // T_INT
case 'J': // T_LONG
case 'S': // T_SHORT
case 'Z': // T_BOOLEAN
// If it is an array, the type is the last character
return (i + 1 == len);
case 'L':
// If it is an object, the last character must be a ';'
return sig->byte_at(len - 1) == ';';
}
return false;
}
BasicType FieldType::get_array_info(symbolOop signature, jint* dimension, symbolOop* object_key, TRAPS) {
assert(basic_type(signature) == T_ARRAY, "must be array");
int index = 1;
int dim = 1;
skip_optional_size(signature, &index);
while (signature->byte_at(index) == '[') {
index++;
dim++;
skip_optional_size(signature, &index);
}
ResourceMark rm;
symbolOop element = oopFactory::new_symbol(signature->as_C_string() + index, CHECK_(T_BYTE));
BasicType element_type = FieldType::basic_type(element);
if (element_type == T_OBJECT) {
char* object_type = element->as_C_string();
object_type[element->utf8_length() - 1] = '\0';
*object_key = oopFactory::new_symbol(object_type + 1, CHECK_(T_BYTE));
}
// Pass dimension back to caller
*dimension = dim;
return element_type;
}