1 /*
 2  * Copyright (c) 2017, 2018, 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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23  */
24 
25 #ifndef SHARE_VM_CODE_COMPILEDMETHOD_INLINE_HPP
26 #define SHARE_VM_CODE_COMPILEDMETHOD_INLINE_HPP
27 
28 #include "code/compiledMethod.hpp"
29 #include "code/nativeInst.hpp"
30 #include "runtime/frame.hpp"
31 #include "runtime/orderAccess.hpp"
32 
33 inline bool CompiledMethod::is_deopt_pc(address pc) { return is_deopt_entry(pc) || is_deopt_mh_entry(pc); }
34 
35 // When using JVMCI the address might be off by the size of a call instruction.
36 inline bool CompiledMethod::is_deopt_entry(address pc) {
37   return pc == deopt_handler_begin()
38 #if INCLUDE_JVMCI
39     || (is_compiled_by_jvmci() && pc == (deopt_handler_begin() + NativeCall::instruction_size))
40 #endif
41     ;
42 }
43 
44 inline void CompiledMethod::release_set_exception_cache(ExceptionCache *ec) {
45   OrderAccess::release_store(&_exception_cache, ec);
46 }
47 
48 // -----------------------------------------------------------------------------
49 // CompiledMethod::get_deopt_original_pc
50 //
51 // Return the original PC for the given PC if:
52 // (a) the given PC belongs to a nmethod and
53 // (b) it is a deopt PC
54 
55 inline address CompiledMethod::get_deopt_original_pc(const frame* fr) {
56   if (fr->cb() == NULL)  return NULL;
57 
58   CompiledMethod* cm = fr->cb()->as_compiled_method_or_null();
59   if (cm != NULL && cm->is_deopt_pc(fr->pc()))
60     return cm->get_original_pc(fr);
61 
62   return NULL;
63 }
64 
65 
66 // class ExceptionCache methods
67 
68 inline int ExceptionCache::count() { return OrderAccess::load_acquire(&_count); }
69 
70 address ExceptionCache::pc_at(int index) {
71   assert(index >= 0 && index < count(),"");
72   return _pc[index];
73 }
74 
75 address ExceptionCache::handler_at(int index) {
76   assert(index >= 0 && index < count(),"");
77   return _handler[index];
78 }
79 
80 // increment_count is only called under lock, but there may be concurrent readers.
81 inline void ExceptionCache::increment_count() { OrderAccess::release_store(&_count, _count + 1); }
82 
83 
84 #endif //SHARE_VM_CODE_COMPILEDMETHOD_INLINE_HPP