1 /*
  2  * Copyright (c) 2018, 2023, 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
 21  * questions.
 22  *
 23  */
 24 
 25 #ifndef SHARE_OOPS_METHOD_INLINE_HPP
 26 #define SHARE_OOPS_METHOD_INLINE_HPP
 27 
 28 #include "oops/method.hpp"
 29 
 30 #include "classfile/vmIntrinsics.hpp"
 31 #include "oops/methodCounters.hpp"
 32 #include "runtime/atomic.hpp"
 33 
 34 inline address Method::from_compiled_entry() const {
 35   return Atomic::load_acquire(&_from_compiled_entry);
 36 }
 37 
 38 inline address Method::from_compiled_inline_ro_entry() const {
 39   return Atomic::load_acquire(&_from_compiled_inline_ro_entry);
 40 }
 41 
 42 inline address Method::from_compiled_inline_entry() const {
 43   return Atomic::load_acquire(&_from_compiled_inline_entry);
 44 }
 45 
 46 inline address Method::from_interpreted_entry() const {
 47   return Atomic::load_acquire(&_from_interpreted_entry);
 48 }
 49 
 50 inline CompiledMethod* Method::code() const {
 51   assert( check_code(), "" );
 52   return Atomic::load_acquire(&_code);
 53 }
 54 
 55 // Write (bci, line number) pair to stream
 56 inline void CompressedLineNumberWriteStream::write_pair_regular(int bci_delta, int line_delta) {
 57   // bci and line number does not compress into single byte.
 58   // Write out escape character and use regular compression for bci and line number.
 59   write_byte((jubyte)0xFF);
 60   write_signed_int(bci_delta);
 61   write_signed_int(line_delta);
 62 }
 63 
 64 inline void CompressedLineNumberWriteStream::write_pair_inline(int bci, int line) {
 65   int bci_delta = bci - _bci;
 66   int line_delta = line - _line;
 67   _bci = bci;
 68   _line = line;
 69   // Skip (0,0) deltas - they do not add information and conflict with terminator.
 70   if (bci_delta == 0 && line_delta == 0) return;
 71   // Check if bci is 5-bit and line number 3-bit unsigned.
 72   if (((bci_delta & ~0x1F) == 0) && ((line_delta & ~0x7) == 0)) {
 73     // Compress into single byte.
 74     jubyte value = (jubyte)((bci_delta << 3) | line_delta);
 75     // Check that value doesn't match escape character.
 76     if (value != 0xFF) {
 77       write_byte(value);
 78       return;
 79     }
 80   }
 81   write_pair_regular(bci_delta, line_delta);
 82 }
 83 
 84 inline void CompressedLineNumberWriteStream::write_pair(int bci, int line) {
 85   write_pair_inline(bci, line);
 86 }
 87 
 88 inline bool Method::has_compiled_code() const { return code() != nullptr; }
 89 
 90 inline bool Method::is_empty_method() const {
 91   return  code_size() == 1
 92       && *code_base() == Bytecodes::_return;
 93 }
 94 
 95 inline bool Method::is_continuation_enter_intrinsic() const {
 96   return intrinsic_id() == vmIntrinsics::_Continuation_enterSpecial;
 97 }
 98 
 99 inline bool Method::is_continuation_yield_intrinsic() const {
100   return intrinsic_id() == vmIntrinsics::_Continuation_doYield;
101 }
102 
103 inline bool Method::is_continuation_native_intrinsic() const {
104   return intrinsic_id() == vmIntrinsics::_Continuation_enterSpecial ||
105          intrinsic_id() == vmIntrinsics::_Continuation_doYield;
106 }
107 
108 inline bool Method::is_special_native_intrinsic() const {
109   return is_method_handle_intrinsic() || is_continuation_native_intrinsic();
110 }
111 
112 #if INCLUDE_JVMTI
113 inline u2 Method::number_of_breakpoints() const {
114   MethodCounters* mcs = method_counters();
115   if (mcs == nullptr) {
116     return 0;
117   } else {
118     return mcs->number_of_breakpoints();
119   }
120 }
121 
122 inline void Method::incr_number_of_breakpoints(Thread* current) {
123   MethodCounters* mcs = get_method_counters(current);
124   if (mcs != nullptr) {
125     mcs->incr_number_of_breakpoints();
126   }
127 }
128 
129 inline void Method::decr_number_of_breakpoints(Thread* current) {
130   MethodCounters* mcs = get_method_counters(current);
131   if (mcs != nullptr) {
132     mcs->decr_number_of_breakpoints();
133   }
134 }
135 
136 // Initialization only
137 inline void Method::clear_number_of_breakpoints() {
138   MethodCounters* mcs = method_counters();
139   if (mcs != nullptr) {
140     mcs->clear_number_of_breakpoints();
141   }
142 }
143 #endif // INCLUDE_JVMTI
144 
145 #if COMPILER2_OR_JVMCI
146 inline void Method::interpreter_throwout_increment(Thread* current) {
147   MethodCounters* mcs = get_method_counters(current);
148   if (mcs != nullptr) {
149     mcs->interpreter_throwout_increment();
150   }
151 }
152 #endif
153 
154 inline int Method::interpreter_throwout_count() const        {
155   MethodCounters* mcs = method_counters();
156   if (mcs == nullptr) {
157     return 0;
158   } else {
159     return mcs->interpreter_throwout_count();
160   }
161 }
162 
163 inline int Method::prev_event_count() const {
164   MethodCounters* mcs = method_counters();
165   return mcs == nullptr ? 0 : mcs->prev_event_count();
166 }
167 
168 inline void Method::set_prev_event_count(int count) {
169   MethodCounters* mcs = method_counters();
170   if (mcs != nullptr) {
171     mcs->set_prev_event_count(count);
172   }
173 }
174 
175 inline jlong Method::prev_time() const {
176   MethodCounters* mcs = method_counters();
177   return mcs == nullptr ? 0 : mcs->prev_time();
178 }
179 
180 inline void Method::set_prev_time(jlong time) {
181   MethodCounters* mcs = method_counters();
182   if (mcs != nullptr) {
183     mcs->set_prev_time(time);
184   }
185 }
186 
187 inline float Method::rate() const {
188   MethodCounters* mcs = method_counters();
189   return mcs == nullptr ? 0 : mcs->rate();
190 }
191 
192 inline void Method::set_rate(float rate) {
193   MethodCounters* mcs = method_counters();
194   if (mcs != nullptr) {
195     mcs->set_rate(rate);
196   }
197 }
198 
199 #endif // SHARE_OOPS_METHOD_INLINE_HPP