/*
* Copyright ( c ) 2006 , 2019 , 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_CI_CIMETHODBLOCKS_HPP
#define SHARE_CI_CIMETHODBLOCKS_HPP
#include "ci/ciMethod.hpp"
#include "memory/resourceArea.hpp"
#include "utilities/growableArray.hpp"
class ciBlock;
class ciMethodBlocks : public ArenaObj {
private :
ciMethod *_method;
Arena *_arena;
GrowableArray<ciBlock *> *_blocks;
ciBlock **_bci_to_block;
int _num_blocks;
int _code_size;
void do_analysis();
public :
ciMethodBlocks(Arena *arena, ciMethod *meth);
ciBlock *block_containing(int bci);
ciBlock *block(int index) { return _blocks->at(index); }
ciBlock *make_block_at(int bci);
ciBlock *split_block_at(int bci);
bool is_block_start(int bci);
int num_blocks() { return _num_blocks;}
void clear_processed();
ciBlock *make_dummy_block(); // a block not associated with a bci
#ifndef PRODUCT
void dump();
#endif
};
class ciBlock : public ArenaObj {
private :
int _idx;
int _start_bci;
int _limit_bci;
int _control_bci;
uint _flags;
int _ex_start_bci;
int _ex_limit_bci;
#ifndef PRODUCT
ciMethod *_method;
#endif
enum {
Processed = (1 << 0 ),
Handler = (1 << 1 ),
MayThrow = (1 << 2 ),
DoesJsr = (1 << 3 ),
DoesRet = (1 << 4 ),
RetTarget = (1 << 5 ),
HasHandler = (1 << 6 )
};
public :
enum {
fall_through_bci = -1
};
ciBlock(ciMethod *method, int index, int start_bci);
int start_bci() const { return _start_bci; }
int limit_bci() const { return _limit_bci; }
int control_bci() const { return _control_bci; }
int index() const { return _idx; }
void set_start_bci(int bci) { _start_bci = bci; }
void set_limit_bci(int bci) { _limit_bci = bci; }
void set_control_bci(int bci) { _control_bci = bci;}
void set_exception_range(int start_bci, int limit_bci);
int ex_start_bci() const { return _ex_start_bci; }
int ex_limit_bci() const { return _ex_limit_bci; }
bool contains(int bci) const { return start_bci() <= bci && bci < limit_bci(); }
// flag handling
bool processed() const { return (_flags & Processed) != 0 ; }
bool is_handler() const { return (_flags & Handler) != 0 ; }
bool may_throw() const { return (_flags & MayThrow) != 0 ; }
bool does_jsr() const { return (_flags & DoesJsr) != 0 ; }
bool does_ret() const { return (_flags & DoesRet) != 0 ; }
bool has_handler() const { return (_flags & HasHandler) != 0 ; }
bool is_ret_target() const { return (_flags & RetTarget) != 0 ; }
void set_processed() { _flags |= Processed; }
void clear_processed() { _flags &= ~Processed; }
void set_handler() { _flags |= Handler; }
void set_may_throw() { _flags |= MayThrow; }
void set_does_jsr() { _flags |= DoesJsr; }
void clear_does_jsr() { _flags &= ~DoesJsr; }
void set_does_ret() { _flags |= DoesRet; }
void clear_does_ret() { _flags &= ~DoesRet; }
void set_is_ret_target() { _flags |= RetTarget; }
void set_has_handler() { _flags |= HasHandler; }
void clear_exception_handler() { _flags &= ~Handler; _ex_start_bci = -1 ; _ex_limit_bci = -1 ; }
#ifndef PRODUCT
ciMethod *method() const { return _method; }
void dump();
void print_on(outputStream* st) const PRODUCT_RETURN;
#endif
};
#endif // SHARE_CI_CIMETHODBLOCKS_HPP
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(vorverarbeitet am 2026-09-11)
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