1 /*
 2  * Copyright (c) 2017, 2021, Oracle and/or its affiliates. All rights reserved.
 3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 4  *
 5  * This code is free software; you can redistribute it and/or modify it
 6  * under the terms of the GNU General Public License version 2 only, as
 7  * published by the Free Software Foundation.
 8  *
 9  * This code is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * version 2 for more details (a copy is included in the LICENSE file that
13  * accompanied this code).
14  *
15  * You should have received a copy of the GNU General Public License version
16  * 2 along with this work; if not, write to the Free Software Foundation,
17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18  *
19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
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24 
25 #ifndef SHARE_CODE_COMPILEDMETHOD_INLINE_HPP
26 #define SHARE_CODE_COMPILEDMETHOD_INLINE_HPP
27 
28 #include "code/compiledMethod.hpp"
29 
30 #include "code/nativeInst.hpp"
31 #include "runtime/atomic.hpp"
32 #include "runtime/frame.hpp"
33 
34 inline bool CompiledMethod::is_deopt_pc(address pc) { return is_deopt_entry(pc) || is_deopt_mh_entry(pc); }
35 
36 // When using JVMCI the address might be off by the size of a call instruction.
37 inline bool CompiledMethod::is_deopt_entry(address pc) {
38   return pc == deopt_handler_begin()
39 #if INCLUDE_JVMCI
40     || (is_compiled_by_jvmci() && pc == (deopt_handler_begin() + NativeCall::instruction_size))
41 #endif
42     ;
43 }
44 
45 inline bool CompiledMethod::is_deopt_mh_entry(address pc) {
46   return pc == deopt_mh_handler_begin()
47 #if INCLUDE_JVMCI
48     || (is_compiled_by_jvmci() && pc == (deopt_mh_handler_begin() + NativeCall::instruction_size))
49 #endif
50     ;
51 }
52 
53 // -----------------------------------------------------------------------------
54 // CompiledMethod::get_deopt_original_pc
55 //
56 // Return the original PC for the given PC if:
57 // (a) the given PC belongs to a nmethod and
58 // (b) it is a deopt PC
59 
60 inline address CompiledMethod::get_deopt_original_pc(const frame* fr) {
61   if (fr->cb() == NULL)  return NULL;
62 
63   CompiledMethod* cm = fr->cb()->as_compiled_method_or_null();
64   if (cm != NULL && cm->is_deopt_pc(fr->pc()))
65     return cm->get_original_pc(fr);
66 
67   return NULL;
68 }
69 

70 // class ExceptionCache methods
71 
72 inline int ExceptionCache::count() { return Atomic::load_acquire(&_count); }
73 
74 address ExceptionCache::pc_at(int index) {
75   assert(index >= 0 && index < count(),"");
76   return _pc[index];
77 }
78 
79 address ExceptionCache::handler_at(int index) {
80   assert(index >= 0 && index < count(),"");
81   return _handler[index];
82 }
83 
84 // increment_count is only called under lock, but there may be concurrent readers.
85 inline void ExceptionCache::increment_count() { Atomic::release_store(&_count, _count + 1); }
86 

87 #endif // SHARE_CODE_COMPILEDMETHOD_INLINE_HPP
--- EOF ---