Mercurial > hg > graal-jvmci-8
annotate src/share/vm/code/nmethod.hpp @ 20804:7848fc12602b
Merge with jdk8u40-b25
author | Gilles Duboscq <gilles.m.duboscq@oracle.com> |
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date | Tue, 07 Apr 2015 14:58:49 +0200 |
parents | 8f2fb6bec986 b12a2a9b05ca |
children | 1621af5cb444 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #ifndef SHARE_VM_CODE_NMETHOD_HPP |
26 #define SHARE_VM_CODE_NMETHOD_HPP | |
27 | |
28 #include "code/codeBlob.hpp" | |
29 #include "code/pcDesc.hpp" | |
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30 #include "oops/metadata.hpp" |
1972 | 31 |
0 | 32 // This class is used internally by nmethods, to cache |
33 // exception/pc/handler information. | |
34 | |
6197 | 35 class ExceptionCache : public CHeapObj<mtCode> { |
0 | 36 friend class VMStructs; |
37 private: | |
38 enum { cache_size = 16 }; | |
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39 Klass* _exception_type; |
0 | 40 address _pc[cache_size]; |
41 address _handler[cache_size]; | |
42 int _count; | |
43 ExceptionCache* _next; | |
44 | |
45 address pc_at(int index) { assert(index >= 0 && index < count(),""); return _pc[index]; } | |
46 void set_pc_at(int index, address a) { assert(index >= 0 && index < cache_size,""); _pc[index] = a; } | |
47 address handler_at(int index) { assert(index >= 0 && index < count(),""); return _handler[index]; } | |
48 void set_handler_at(int index, address a) { assert(index >= 0 && index < cache_size,""); _handler[index] = a; } | |
49 int count() { return _count; } | |
50 void increment_count() { _count++; } | |
51 | |
52 public: | |
53 | |
54 ExceptionCache(Handle exception, address pc, address handler); | |
55 | |
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56 Klass* exception_type() { return _exception_type; } |
0 | 57 ExceptionCache* next() { return _next; } |
58 void set_next(ExceptionCache *ec) { _next = ec; } | |
59 | |
60 address match(Handle exception, address pc); | |
61 bool match_exception_with_space(Handle exception) ; | |
62 address test_address(address addr); | |
63 bool add_address_and_handler(address addr, address handler) ; | |
64 }; | |
65 | |
66 | |
67 // cache pc descs found in earlier inquiries | |
68 class PcDescCache VALUE_OBJ_CLASS_SPEC { | |
69 friend class VMStructs; | |
70 private: | |
71 enum { cache_size = 4 }; | |
20227 | 72 // The array elements MUST be volatile! Several threads may modify |
73 // and read from the cache concurrently. find_pc_desc_internal has | |
74 // returned wrong results. C++ compiler (namely xlC12) may duplicate | |
75 // C++ field accesses if the elements are not volatile. | |
76 typedef PcDesc* PcDescPtr; | |
77 volatile PcDescPtr _pc_descs[cache_size]; // last cache_size pc_descs found | |
0 | 78 public: |
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79 PcDescCache() { debug_only(_pc_descs[0] = NULL); } |
0 | 80 void reset_to(PcDesc* initial_pc_desc); |
81 PcDesc* find_pc_desc(int pc_offset, bool approximate); | |
82 void add_pc_desc(PcDesc* pc_desc); | |
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83 PcDesc* last_pc_desc() { return _pc_descs[0]; } |
0 | 84 }; |
85 | |
86 | |
87 // nmethods (native methods) are the compiled code versions of Java methods. | |
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88 // |
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89 // An nmethod contains: |
0 | 90 // - header (the nmethod structure) |
91 // [Relocation] | |
92 // - relocation information | |
93 // - constant part (doubles, longs and floats used in nmethod) | |
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94 // - oop table |
0 | 95 // [Code] |
96 // - code body | |
97 // - exception handler | |
98 // - stub code | |
99 // [Debugging information] | |
100 // - oop array | |
101 // - data array | |
102 // - pcs | |
103 // [Exception handler table] | |
104 // - handler entry point array | |
105 // [Implicit Null Pointer exception table] | |
106 // - implicit null table array | |
107 | |
108 class Dependencies; | |
109 class ExceptionHandlerTable; | |
110 class ImplicitExceptionTable; | |
111 class AbstractCompiler; | |
112 class xmlStream; | |
113 | |
114 class nmethod : public CodeBlob { | |
115 friend class VMStructs; | |
116 friend class NMethodSweeper; | |
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117 friend class CodeCache; // scavengable oops |
0 | 118 private: |
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119 |
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120 // GC support to help figure out if an nmethod has been |
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121 // cleaned/unloaded by the current GC. |
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122 static unsigned char _global_unloading_clock; |
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123 |
0 | 124 // Shared fields for all nmethod's |
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125 Method* _method; |
0 | 126 int _entry_bci; // != InvocationEntryBci if this nmethod is an on-stack replacement method |
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127 jmethodID _jmethod_id; // Cache of method()->jmethod_id() |
0 | 128 |
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129 #ifdef GRAAL |
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130 // Needed to keep nmethods alive that are not the default nmethod for the associated Method. |
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131 oop _graal_installed_code; |
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132 oop _speculation_log; |
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133 #endif |
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134 |
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135 // To support simple linked-list chaining of nmethods: |
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136 nmethod* _osr_link; // from InstanceKlass::osr_nmethods_head |
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137 |
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138 union { |
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139 // Used by G1 to chain nmethods. |
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140 nmethod* _unloading_next; |
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141 // Used by non-G1 GCs to chain nmethods. |
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142 nmethod* _scavenge_root_link; // from CodeCache::scavenge_root_nmethods |
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143 }; |
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144 |
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145 static nmethod* volatile _oops_do_mark_nmethods; |
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146 nmethod* volatile _oops_do_mark_link; |
0 | 147 |
148 AbstractCompiler* _compiler; // The compiler which compiled this nmethod | |
149 | |
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150 // offsets for entry points |
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151 address _entry_point; // entry point with class check |
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152 address _verified_entry_point; // entry point without class check |
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153 address _osr_entry_point; // entry point for on stack replacement |
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154 |
0 | 155 // Offsets for different nmethod parts |
156 int _exception_offset; | |
1204 | 157 // All deoptee's will resume execution at this location described by |
158 // this offset. | |
0 | 159 int _deoptimize_offset; |
1204 | 160 // All deoptee's at a MethodHandle call site will resume execution |
161 // at this location described by this offset. | |
162 int _deoptimize_mh_offset; | |
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163 // Offset of the unwind handler if it exists |
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164 int _unwind_handler_offset; |
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165 |
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166 #ifdef HAVE_DTRACE_H |
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167 int _trap_offset; |
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168 #endif // def HAVE_DTRACE_H |
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169 int _consts_offset; |
0 | 170 int _stub_offset; |
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171 int _oops_offset; // offset to where embedded oop table begins (inside data) |
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172 int _metadata_offset; // embedded meta data table |
0 | 173 int _scopes_data_offset; |
174 int _scopes_pcs_offset; | |
175 int _dependencies_offset; | |
176 int _handler_table_offset; | |
177 int _nul_chk_table_offset; | |
178 int _nmethod_end_offset; | |
179 | |
180 // location in frame (offset for sp) that deopt can store the original | |
181 // pc during a deopt. | |
182 int _orig_pc_offset; | |
183 | |
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184 int _compile_id; // which compilation made this nmethod |
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185 int _comp_level; // compilation level |
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186 |
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187 // protected by CodeCache_lock |
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188 bool _has_flushed_dependencies; // Used for maintenance of dependencies (CodeCache_lock) |
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189 |
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190 bool _marked_for_reclamation; // Used by NMethodSweeper (set only by sweeper) |
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191 bool _marked_for_deoptimization; // Used for stack deoptimization |
0 | 192 |
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193 // used by jvmti to track if an unload event has been posted for this nmethod. |
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194 bool _unload_reported; |
0 | 195 |
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196 // set during construction |
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197 unsigned int _has_unsafe_access:1; // May fault due to unsafe access. |
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198 unsigned int _has_method_handle_invokes:1; // Has this method MethodHandle invokes? |
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199 unsigned int _lazy_critical_native:1; // Lazy JNI critical native |
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200 unsigned int _has_wide_vectors:1; // Preserve wide vectors at safepoints |
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201 |
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202 // Protected by Patching_lock |
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203 volatile unsigned char _state; // {alive, not_entrant, zombie, unloaded} |
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204 |
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205 volatile unsigned char _unloading_clock; // Incremented after GC unloaded/cleaned the nmethod |
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206 |
1726 | 207 #ifdef ASSERT |
208 bool _oops_are_stale; // indicates that it's no longer safe to access oops section | |
209 #endif | |
210 | |
13441 | 211 enum { in_use = 0, // executable nmethod |
212 not_entrant = 1, // marked for deoptimization but activations may still exist, | |
213 // will be transformed to zombie when all activations are gone | |
214 zombie = 2, // no activations exist, nmethod is ready for purge | |
215 unloaded = 3 }; // there should be no activations, should not be called, | |
216 // will be transformed to zombie immediately | |
0 | 217 |
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218 jbyte _scavenge_root_state; |
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219 |
17780 | 220 #if INCLUDE_RTM_OPT |
221 // RTM state at compile time. Used during deoptimization to decide | |
222 // whether to restart collecting RTM locking abort statistic again. | |
223 RTMState _rtm_state; | |
224 #endif | |
225 | |
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226 // Nmethod Flushing lock. If non-zero, then the nmethod is not removed |
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227 // and is not made into a zombie. However, once the nmethod is made into |
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228 // a zombie, it will be locked one final time if CompiledMethodUnload |
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229 // event processing needs to be done. |
0 | 230 jint _lock_count; |
231 | |
232 // not_entrant method removal. Each mark_sweep pass will update | |
233 // this mark to current sweep invocation count if it is seen on the | |
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234 // stack. An not_entrant method can be removed when there are no |
0 | 235 // more activations, i.e., when the _stack_traversal_mark is less than |
236 // current sweep traversal index. | |
237 long _stack_traversal_mark; | |
238 | |
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239 // The _hotness_counter indicates the hotness of a method. The higher |
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240 // the value the hotter the method. The hotness counter of a nmethod is |
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241 // set to [(ReservedCodeCacheSize / (1024 * 1024)) * 2] each time the method |
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242 // is active while stack scanning (mark_active_nmethods()). The hotness |
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243 // counter is decreased (by 1) while sweeping. |
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244 int _hotness_counter; |
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245 |
0 | 246 ExceptionCache *_exception_cache; |
247 PcDescCache _pc_desc_cache; | |
248 | |
2019 | 249 // These are used for compiled synchronized native methods to |
0 | 250 // locate the owner and stack slot for the BasicLock so that we can |
251 // properly revoke the bias of the owner if necessary. They are | |
252 // needed because there is no debug information for compiled native | |
253 // wrappers and the oop maps are insufficient to allow | |
254 // frame::retrieve_receiver() to work. Currently they are expected | |
255 // to be byte offsets from the Java stack pointer for maximum code | |
256 // sharing between platforms. Note that currently biased locking | |
257 // will never cause Class instances to be biased but this code | |
258 // handles the static synchronized case as well. | |
2019 | 259 // JVMTI's GetLocalInstance() also uses these offsets to find the receiver |
260 // for non-static native wrapper frames. | |
261 ByteSize _native_receiver_sp_offset; | |
262 ByteSize _native_basic_lock_sp_offset; | |
0 | 263 |
264 friend class nmethodLocker; | |
265 | |
266 // For native wrappers | |
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267 nmethod(Method* method, |
0 | 268 int nmethod_size, |
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269 int compile_id, |
0 | 270 CodeOffsets* offsets, |
271 CodeBuffer *code_buffer, | |
272 int frame_size, | |
273 ByteSize basic_lock_owner_sp_offset, /* synchronized natives only */ | |
274 ByteSize basic_lock_sp_offset, /* synchronized natives only */ | |
275 OopMapSet* oop_maps); | |
276 | |
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277 #ifdef HAVE_DTRACE_H |
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278 // For native wrappers |
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279 nmethod(Method* method, |
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280 int nmethod_size, |
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281 CodeOffsets* offsets, |
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282 CodeBuffer *code_buffer, |
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283 int frame_size); |
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284 #endif // def HAVE_DTRACE_H |
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285 |
0 | 286 // Creation support |
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287 nmethod(Method* method, |
0 | 288 int nmethod_size, |
289 int compile_id, | |
290 int entry_bci, | |
291 CodeOffsets* offsets, | |
292 int orig_pc_offset, | |
293 DebugInformationRecorder *recorder, | |
294 Dependencies* dependencies, | |
295 CodeBuffer *code_buffer, | |
296 int frame_size, | |
297 OopMapSet* oop_maps, | |
298 ExceptionHandlerTable* handler_table, | |
299 ImplicitExceptionTable* nul_chk_table, | |
300 AbstractCompiler* compiler, | |
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301 int comp_level |
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302 #ifdef GRAAL |
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303 , Handle installed_code, |
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304 Handle speculation_log |
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305 #endif |
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306 ); |
0 | 307 |
308 // helper methods | |
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309 void* operator new(size_t size, int nmethod_size) throw(); |
0 | 310 |
311 const char* reloc_string_for(u_char* begin, u_char* end); | |
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312 // Returns true if this thread changed the state of the nmethod or |
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313 // false if another thread performed the transition. |
1141 | 314 bool make_not_entrant_or_zombie(unsigned int state); |
0 | 315 void inc_decompile_count(); |
316 | |
317 // Used to manipulate the exception cache | |
318 void add_exception_cache_entry(ExceptionCache* new_entry); | |
319 ExceptionCache* exception_cache_entry_for_exception(Handle exception); | |
320 | |
321 // Inform external interfaces that a compiled method has been unloaded | |
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322 void post_compiled_method_unload(); |
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323 |
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324 // Initailize fields to their default values |
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325 void init_defaults(); |
0 | 326 |
327 public: | |
328 // create nmethod with entry_bci | |
329 static nmethod* new_nmethod(methodHandle method, | |
330 int compile_id, | |
331 int entry_bci, | |
332 CodeOffsets* offsets, | |
333 int orig_pc_offset, | |
334 DebugInformationRecorder* recorder, | |
335 Dependencies* dependencies, | |
336 CodeBuffer *code_buffer, | |
337 int frame_size, | |
338 OopMapSet* oop_maps, | |
339 ExceptionHandlerTable* handler_table, | |
340 ImplicitExceptionTable* nul_chk_table, | |
341 AbstractCompiler* compiler, | |
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342 int comp_level |
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343 #ifdef GRAAL |
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344 , Handle installed_code = Handle(), |
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345 Handle speculation_log = Handle() |
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346 #endif |
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347 ); |
0 | 348 |
349 static nmethod* new_native_nmethod(methodHandle method, | |
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350 int compile_id, |
0 | 351 CodeBuffer *code_buffer, |
352 int vep_offset, | |
353 int frame_complete, | |
354 int frame_size, | |
355 ByteSize receiver_sp_offset, | |
356 ByteSize basic_lock_sp_offset, | |
357 OopMapSet* oop_maps); | |
358 | |
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359 #ifdef HAVE_DTRACE_H |
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360 // The method we generate for a dtrace probe has to look |
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361 // like an nmethod as far as the rest of the system is concerned |
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362 // which is somewhat unfortunate. |
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363 static nmethod* new_dtrace_nmethod(methodHandle method, |
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364 CodeBuffer *code_buffer, |
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365 int vep_offset, |
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366 int trap_offset, |
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367 int frame_complete, |
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368 int frame_size); |
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369 |
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370 int trap_offset() const { return _trap_offset; } |
1748 | 371 address trap_address() const { return insts_begin() + _trap_offset; } |
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372 |
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373 #endif // def HAVE_DTRACE_H |
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374 |
0 | 375 // accessors |
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376 Method* method() const { return _method; } |
0 | 377 AbstractCompiler* compiler() const { return _compiler; } |
378 | |
379 // type info | |
380 bool is_nmethod() const { return true; } | |
381 bool is_java_method() const { return !method()->is_native(); } | |
382 bool is_native_method() const { return method()->is_native(); } | |
383 bool is_osr_method() const { return _entry_bci != InvocationEntryBci; } | |
384 | |
385 bool is_compiled_by_c1() const; | |
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386 bool is_compiled_by_graal() const; |
0 | 387 bool is_compiled_by_c2() const; |
1692 | 388 bool is_compiled_by_shark() const; |
0 | 389 |
390 // boundaries for different parts | |
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391 address consts_begin () const { return header_begin() + _consts_offset ; } |
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392 address consts_end () const { return header_begin() + code_offset() ; } |
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393 address insts_begin () const { return header_begin() + code_offset() ; } |
1748 | 394 address insts_end () const { return header_begin() + _stub_offset ; } |
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395 address stub_begin () const { return header_begin() + _stub_offset ; } |
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396 address stub_end () const { return header_begin() + _oops_offset ; } |
1204 | 397 address exception_begin () const { return header_begin() + _exception_offset ; } |
398 address deopt_handler_begin () const { return header_begin() + _deoptimize_offset ; } | |
399 address deopt_mh_handler_begin() const { return header_begin() + _deoptimize_mh_offset ; } | |
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400 address unwind_handler_begin () const { return _unwind_handler_offset != -1 ? (header_begin() + _unwind_handler_offset) : NULL; } |
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401 oop* oops_begin () const { return (oop*) (header_begin() + _oops_offset) ; } |
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402 oop* oops_end () const { return (oop*) (header_begin() + _metadata_offset) ; } |
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403 |
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404 Metadata** metadata_begin () const { return (Metadata**) (header_begin() + _metadata_offset) ; } |
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405 Metadata** metadata_end () const { return (Metadata**) (header_begin() + _scopes_data_offset) ; } |
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406 |
1204 | 407 address scopes_data_begin () const { return header_begin() + _scopes_data_offset ; } |
408 address scopes_data_end () const { return header_begin() + _scopes_pcs_offset ; } | |
409 PcDesc* scopes_pcs_begin () const { return (PcDesc*)(header_begin() + _scopes_pcs_offset ); } | |
410 PcDesc* scopes_pcs_end () const { return (PcDesc*)(header_begin() + _dependencies_offset) ; } | |
411 address dependencies_begin () const { return header_begin() + _dependencies_offset ; } | |
412 address dependencies_end () const { return header_begin() + _handler_table_offset ; } | |
413 address handler_table_begin () const { return header_begin() + _handler_table_offset ; } | |
414 address handler_table_end () const { return header_begin() + _nul_chk_table_offset ; } | |
415 address nul_chk_table_begin () const { return header_begin() + _nul_chk_table_offset ; } | |
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416 address nul_chk_table_end () const { return header_begin() + _nmethod_end_offset; } |
0 | 417 |
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418 // Sizes |
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419 int consts_size () const { return consts_end () - consts_begin (); } |
1748 | 420 int insts_size () const { return insts_end () - insts_begin (); } |
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421 int stub_size () const { return stub_end () - stub_begin (); } |
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422 int oops_size () const { return (address) oops_end () - (address) oops_begin (); } |
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423 int metadata_size () const { return (address) metadata_end () - (address) metadata_begin (); } |
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424 int scopes_data_size () const { return scopes_data_end () - scopes_data_begin (); } |
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425 int scopes_pcs_size () const { return (intptr_t) scopes_pcs_end () - (intptr_t) scopes_pcs_begin (); } |
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426 int dependencies_size () const { return dependencies_end () - dependencies_begin (); } |
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427 int handler_table_size() const { return handler_table_end() - handler_table_begin(); } |
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428 int nul_chk_table_size() const { return nul_chk_table_end() - nul_chk_table_begin(); } |
0 | 429 |
430 int total_size () const; | |
431 | |
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432 void dec_hotness_counter() { _hotness_counter--; } |
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433 void set_hotness_counter(int val) { _hotness_counter = val; } |
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434 int hotness_counter() const { return _hotness_counter; } |
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435 |
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436 // Containment |
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437 bool consts_contains (address addr) const { return consts_begin () <= addr && addr < consts_end (); } |
1748 | 438 bool insts_contains (address addr) const { return insts_begin () <= addr && addr < insts_end (); } |
0 | 439 bool stub_contains (address addr) const { return stub_begin () <= addr && addr < stub_end (); } |
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440 bool oops_contains (oop* addr) const { return oops_begin () <= addr && addr < oops_end (); } |
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441 bool metadata_contains (Metadata** addr) const { return metadata_begin () <= addr && addr < metadata_end (); } |
0 | 442 bool scopes_data_contains (address addr) const { return scopes_data_begin () <= addr && addr < scopes_data_end (); } |
443 bool scopes_pcs_contains (PcDesc* addr) const { return scopes_pcs_begin () <= addr && addr < scopes_pcs_end (); } | |
444 bool handler_table_contains(address addr) const { return handler_table_begin() <= addr && addr < handler_table_end(); } | |
445 bool nul_chk_table_contains(address addr) const { return nul_chk_table_begin() <= addr && addr < nul_chk_table_end(); } | |
446 | |
447 // entry points | |
448 address entry_point() const { return _entry_point; } // normal entry point | |
449 address verified_entry_point() const { return _verified_entry_point; } // if klass is correct | |
450 | |
451 // flag accessing and manipulation | |
13441 | 452 bool is_in_use() const { return _state == in_use; } |
453 bool is_alive() const { return _state == in_use || _state == not_entrant; } | |
1644
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454 bool is_not_entrant() const { return _state == not_entrant; } |
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455 bool is_zombie() const { return _state == zombie; } |
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456 bool is_unloaded() const { return _state == unloaded; } |
0 | 457 |
17780 | 458 #if INCLUDE_RTM_OPT |
459 // rtm state accessing and manipulating | |
460 RTMState rtm_state() const { return _rtm_state; } | |
461 void set_rtm_state(RTMState state) { _rtm_state = state; } | |
462 #endif | |
463 | |
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464 // Make the nmethod non entrant. The nmethod will continue to be |
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465 // alive. It is used when an uncommon trap happens. Returns true |
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466 // if this thread changed the state of the nmethod or false if |
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467 // another thread performed the transition. |
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468 bool make_not_entrant() { |
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469 assert(!method()->is_method_handle_intrinsic(), "Cannot make MH intrinsic not entrant"); |
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470 return make_not_entrant_or_zombie(not_entrant); |
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471 } |
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472 bool make_zombie() { return make_not_entrant_or_zombie(zombie); } |
0 | 473 |
474 // used by jvmti to track if the unload event has been reported | |
475 bool unload_reported() { return _unload_reported; } | |
476 void set_unload_reported() { _unload_reported = true; } | |
477 | |
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478 void set_unloading_next(nmethod* next) { _unloading_next = next; } |
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479 nmethod* unloading_next() { return _unloading_next; } |
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480 |
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481 static unsigned char global_unloading_clock() { return _global_unloading_clock; } |
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482 static void increase_unloading_clock(); |
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483 |
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484 void set_unloading_clock(unsigned char unloading_clock); |
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485 unsigned char unloading_clock(); |
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486 |
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487 bool is_marked_for_deoptimization() const { return _marked_for_deoptimization; } |
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488 void mark_for_deoptimization() { _marked_for_deoptimization = true; } |
0 | 489 |
490 void make_unloaded(BoolObjectClosure* is_alive, oop cause); | |
491 | |
492 bool has_dependencies() { return dependencies_size() != 0; } | |
493 void flush_dependencies(BoolObjectClosure* is_alive); | |
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494 bool has_flushed_dependencies() { return _has_flushed_dependencies; } |
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495 void set_has_flushed_dependencies() { |
0 | 496 assert(!has_flushed_dependencies(), "should only happen once"); |
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497 _has_flushed_dependencies = 1; |
0 | 498 } |
499 | |
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500 bool is_marked_for_reclamation() const { return _marked_for_reclamation; } |
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501 void mark_for_reclamation() { _marked_for_reclamation = 1; } |
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502 |
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503 bool has_unsafe_access() const { return _has_unsafe_access; } |
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504 void set_has_unsafe_access(bool z) { _has_unsafe_access = z; } |
0 | 505 |
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506 bool has_method_handle_invokes() const { return _has_method_handle_invokes; } |
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507 void set_has_method_handle_invokes(bool z) { _has_method_handle_invokes = z; } |
0 | 508 |
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509 bool is_lazy_critical_native() const { return _lazy_critical_native; } |
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510 void set_lazy_critical_native(bool z) { _lazy_critical_native = z; } |
1202 | 511 |
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512 bool has_wide_vectors() const { return _has_wide_vectors; } |
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513 void set_has_wide_vectors(bool z) { _has_wide_vectors = z; } |
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514 |
0 | 515 int comp_level() const { return _comp_level; } |
516 | |
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517 // Support for oops in scopes and relocs: |
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518 // Note: index 0 is reserved for null. |
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519 oop oop_at(int index) const { return index == 0 ? (oop) NULL: *oop_addr_at(index); } |
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520 oop* oop_addr_at(int index) const { // for GC |
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521 // relocation indexes are biased by 1 (because 0 is reserved) |
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522 assert(index > 0 && index <= oops_size(), "must be a valid non-zero index"); |
1726 | 523 assert(!_oops_are_stale, "oops are stale"); |
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524 return &oops_begin()[index - 1]; |
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525 } |
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526 |
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527 // Support for meta data in scopes and relocs: |
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528 // Note: index 0 is reserved for null. |
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529 Metadata* metadata_at(int index) const { return index == 0 ? NULL: *metadata_addr_at(index); } |
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530 Metadata** metadata_addr_at(int index) const { // for GC |
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531 // relocation indexes are biased by 1 (because 0 is reserved) |
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532 assert(index > 0 && index <= metadata_size(), "must be a valid non-zero index"); |
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533 return &metadata_begin()[index - 1]; |
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534 } |
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535 |
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536 void copy_values(GrowableArray<jobject>* oops); |
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537 void copy_values(GrowableArray<Metadata*>* metadata); |
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538 |
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539 // Relocation support |
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540 private: |
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541 void fix_oop_relocations(address begin, address end, bool initialize_immediates); |
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542 inline void initialize_immediate_oop(oop* dest, jobject handle); |
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543 |
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544 public: |
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545 void fix_oop_relocations(address begin, address end) { fix_oop_relocations(begin, end, false); } |
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546 void fix_oop_relocations() { fix_oop_relocations(NULL, NULL, false); } |
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547 void verify_oop_relocations(); |
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548 |
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549 bool is_at_poll_return(address pc); |
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550 bool is_at_poll_or_poll_return(address pc); |
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551 |
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552 // Scavengable oop support |
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553 bool on_scavenge_root_list() const { return (_scavenge_root_state & 1) != 0; } |
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554 protected: |
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555 enum { sl_on_list = 0x01, sl_marked = 0x10 }; |
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556 void set_on_scavenge_root_list() { _scavenge_root_state = sl_on_list; } |
989
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557 void clear_on_scavenge_root_list() { _scavenge_root_state = 0; } |
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558 // assertion-checking and pruning logic uses the bits of _scavenge_root_state |
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559 #ifndef PRODUCT |
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560 void set_scavenge_root_marked() { _scavenge_root_state |= sl_marked; } |
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561 void clear_scavenge_root_marked() { _scavenge_root_state &= ~sl_marked; } |
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562 bool scavenge_root_not_marked() { return (_scavenge_root_state &~ sl_on_list) == 0; } |
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563 // N.B. there is no positive marked query, and we only use the not_marked query for asserts. |
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564 #endif //PRODUCT |
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565 nmethod* scavenge_root_link() const { return _scavenge_root_link; } |
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566 void set_scavenge_root_link(nmethod *n) { _scavenge_root_link = n; } |
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567 |
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568 public: |
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569 |
0 | 570 // Sweeper support |
571 long stack_traversal_mark() { return _stack_traversal_mark; } | |
572 void set_stack_traversal_mark(long l) { _stack_traversal_mark = l; } | |
573 | |
574 // Exception cache support | |
575 ExceptionCache* exception_cache() const { return _exception_cache; } | |
576 void set_exception_cache(ExceptionCache *ec) { _exception_cache = ec; } | |
577 address handler_for_exception_and_pc(Handle exception, address pc); | |
578 void add_handler_for_exception_and_pc(Handle exception, address pc, address handler); | |
20269 | 579 void clean_exception_cache(BoolObjectClosure* is_alive); |
0 | 580 |
581 // implicit exceptions support | |
582 address continuation_for_implicit_exception(address pc); | |
583 | |
584 // On-stack replacement support | |
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585 int osr_entry_bci() const { assert(is_osr_method(), "wrong kind of nmethod"); return _entry_bci; } |
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586 address osr_entry() const { assert(is_osr_method(), "wrong kind of nmethod"); return _osr_entry_point; } |
0 | 587 void invalidate_osr_method(); |
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588 nmethod* osr_link() const { return _osr_link; } |
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589 void set_osr_link(nmethod *n) { _osr_link = n; } |
0 | 590 |
591 // tells whether frames described by this nmethod can be deoptimized | |
592 // note: native wrappers cannot be deoptimized. | |
593 bool can_be_deoptimized() const { return is_java_method(); } | |
594 | |
595 // Inline cache support | |
596 void clear_inline_caches(); | |
597 void cleanup_inline_caches(); | |
598 bool inlinecache_check_contains(address addr) const { | |
1748 | 599 return (addr >= code_begin() && addr < verified_entry_point()); |
0 | 600 } |
601 | |
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602 // Verify calls to dead methods have been cleaned. |
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603 void verify_clean_inline_caches(); |
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604 // Verify and count cached icholder relocations. |
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605 int verify_icholder_relocations(); |
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606 // Check that all metadata is still alive |
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607 void verify_metadata_loaders(address low_boundary, BoolObjectClosure* is_alive); |
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608 |
0 | 609 // unlink and deallocate this nmethod |
610 // Only NMethodSweeper class is expected to use this. NMethodSweeper is not | |
611 // expected to use any other private methods/data in this class. | |
612 | |
613 protected: | |
614 void flush(); | |
615 | |
616 public: | |
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617 // When true is returned, it is unsafe to remove this nmethod even if |
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618 // it is a zombie, since the VM or the ServiceThread might still be |
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619 // using it. |
0 | 620 bool is_locked_by_vm() const { return _lock_count >0; } |
621 | |
622 // See comment at definition of _last_seen_on_stack | |
623 void mark_as_seen_on_stack(); | |
624 bool can_not_entrant_be_converted(); | |
625 | |
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626 // Evolution support. We make old (discarded) compiled methods point to new Method*s. |
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627 void set_method(Method* method) { _method = method; } |
0 | 628 |
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629 #ifdef GRAAL |
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Fixed nmethod not being unloaded after their classloader has been unloaded by initializing _graal_installed_code in an nmethod's constructor
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630 oop graal_installed_code() { return _graal_installed_code ; } |
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631 void set_graal_installed_code(oop installed_code) { _graal_installed_code = installed_code; } |
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632 oop speculation_log() { return _speculation_log ; } |
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633 void set_speculation_log(oop speculation_log) { _speculation_log = speculation_log; } |
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634 #endif |
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635 |
0 | 636 // GC support |
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637 void do_unloading(BoolObjectClosure* is_alive, bool unloading_occurred); |
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638 // The parallel versions are used by G1. |
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639 bool do_unloading_parallel(BoolObjectClosure* is_alive, bool unloading_occurred); |
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640 void do_unloading_parallel_postponed(BoolObjectClosure* is_alive, bool unloading_occurred); |
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641 |
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642 private: |
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643 // Unload a nmethod if the *root object is dead. |
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644 bool can_unload(BoolObjectClosure* is_alive, oop* root, bool unloading_occurred); |
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645 bool unload_if_dead_at(RelocIterator *iter_at_oop, BoolObjectClosure* is_alive, bool unloading_occurred); |
0 | 646 |
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647 void mark_metadata_on_stack_at(RelocIterator* iter_at_metadata); |
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648 void mark_metadata_on_stack_non_relocs(); |
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649 |
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650 public: |
0 | 651 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, |
652 OopClosure* f); | |
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653 void oops_do(OopClosure* f) { oops_do(f, false); } |
12080 | 654 void oops_do(OopClosure* f, bool allow_zombie); |
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655 bool detect_scavenge_root_oops(); |
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656 void verify_scavenge_root_oops() PRODUCT_RETURN; |
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657 |
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658 bool test_set_oops_do_mark(); |
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659 static void oops_do_marking_prologue(); |
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660 static void oops_do_marking_epilogue(); |
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661 static bool oops_do_marking_is_active() { return _oops_do_mark_nmethods != NULL; } |
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662 bool test_oops_do_mark() { return _oops_do_mark_link != NULL; } |
0 | 663 |
664 // ScopeDesc for an instruction | |
665 ScopeDesc* scope_desc_at(address pc); | |
666 | |
667 private: | |
668 ScopeDesc* scope_desc_in(address begin, address end); | |
669 | |
1204 | 670 address* orig_pc_addr(const frame* fr) { return (address*) ((address)fr->unextended_sp() + _orig_pc_offset); } |
0 | 671 |
672 PcDesc* find_pc_desc_internal(address pc, bool approximate); | |
673 | |
674 PcDesc* find_pc_desc(address pc, bool approximate) { | |
675 PcDesc* desc = _pc_desc_cache.last_pc_desc(); | |
1748 | 676 if (desc != NULL && desc->pc_offset() == pc - code_begin()) { |
0 | 677 return desc; |
678 } | |
679 return find_pc_desc_internal(pc, approximate); | |
680 } | |
681 | |
682 public: | |
683 // ScopeDesc retrieval operation | |
684 PcDesc* pc_desc_at(address pc) { return find_pc_desc(pc, false); } | |
685 // pc_desc_near returns the first PcDesc at or after the givne pc. | |
686 PcDesc* pc_desc_near(address pc) { return find_pc_desc(pc, true); } | |
687 | |
688 public: | |
689 // copying of debugging information | |
690 void copy_scopes_pcs(PcDesc* pcs, int count); | |
691 void copy_scopes_data(address buffer, int size); | |
692 | |
1204 | 693 // Deopt |
694 // Return true is the PC is one would expect if the frame is being deopted. | |
695 bool is_deopt_pc (address pc) { return is_deopt_entry(pc) || is_deopt_mh_entry(pc); } | |
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696 |
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697 // (thomaswue) When using graal, the address might be off by 5 (because this is the size of the call instruction. |
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698 // (thomaswue) TODO: Replace this by a more general mechanism. |
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699 // (sanzinger) SPARC has another offset, looked for some variable existing in HotSpot which describes this offset, but i have not |
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700 // found anything. |
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701 bool is_deopt_entry (address pc) { |
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702 return pc == deopt_handler_begin() |
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703 #ifdef GRAAL |
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704 || pc == deopt_handler_begin() + |
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705 #ifdef TARGET_ARCH_sparc |
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706 8 |
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707 #endif // sparc |
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708 #ifdef TARGET_ARCH_x86 |
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709 5 |
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710 #endif // x86 |
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711 #endif // GRAAL |
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712 ; |
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713 } |
1204 | 714 bool is_deopt_mh_entry(address pc) { return pc == deopt_mh_handler_begin(); } |
0 | 715 // Accessor/mutator for the original pc of a frame before a frame was deopted. |
716 address get_original_pc(const frame* fr) { return *orig_pc_addr(fr); } | |
717 void set_original_pc(const frame* fr, address pc) { *orig_pc_addr(fr) = pc; } | |
718 | |
1204 | 719 static address get_deopt_original_pc(const frame* fr); |
720 | |
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721 // MethodHandle |
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722 bool is_method_handle_return(address return_pc); |
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723 |
0 | 724 // jvmti support: |
725 void post_compiled_method_load_event(); | |
1616
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726 jmethodID get_and_cache_jmethod_id(); |
0 | 727 |
728 // verify operations | |
729 void verify(); | |
730 void verify_scopes(); | |
731 void verify_interrupt_point(address interrupt_point); | |
732 | |
733 // printing support | |
100
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734 void print() const; |
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735 void print_code(); |
0 | 736 void print_relocations() PRODUCT_RETURN; |
737 void print_pcs() PRODUCT_RETURN; | |
738 void print_scopes() PRODUCT_RETURN; | |
739 void print_dependencies() PRODUCT_RETURN; | |
740 void print_value_on(outputStream* st) const PRODUCT_RETURN; | |
741 void print_calls(outputStream* st) PRODUCT_RETURN; | |
742 void print_handler_table() PRODUCT_RETURN; | |
743 void print_nul_chk_table() PRODUCT_RETURN; | |
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744 void print_nmethod(bool print_code); |
0 | 745 |
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746 // need to re-define this from CodeBlob else the overload hides it |
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747 virtual void print_on(outputStream* st) const { CodeBlob::print_on(st); } |
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748 void print_on(outputStream* st, const char* msg) const; |
0 | 749 |
750 // Logging | |
751 void log_identity(xmlStream* log) const; | |
752 void log_new_nmethod() const; | |
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753 void log_state_change() const; |
0 | 754 |
1155
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755 // Prints block-level comments, including nmethod specific block labels: |
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756 virtual void print_block_comment(outputStream* stream, address block_begin) const { |
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757 print_nmethod_labels(stream, block_begin); |
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758 CodeBlob::print_block_comment(stream, block_begin); |
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759 } |
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760 void print_nmethod_labels(outputStream* stream, address block_begin) const; |
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761 |
0 | 762 // Prints a comment for one native instruction (reloc info, pc desc) |
100
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763 void print_code_comment_on(outputStream* st, int column, address begin, address end); |
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764 static void print_statistics(); |
0 | 765 |
766 // Compiler task identification. Note that all OSR methods | |
767 // are numbered in an independent sequence if CICountOSR is true, | |
768 // and native method wrappers are also numbered independently if | |
769 // CICountNative is true. | |
770 int compile_id() const { return _compile_id; } | |
771 const char* compile_kind() const; | |
772 | |
773 // For debugging | |
774 // CompiledIC* IC_at(char* p) const; | |
775 // PrimitiveIC* primitiveIC_at(char* p) const; | |
776 oop embeddedOop_at(address p); | |
777 | |
778 // tells if any of this method's dependencies have been invalidated | |
779 // (this is expensive!) | |
780 bool check_all_dependencies(); | |
781 | |
782 // tells if this compiled method is dependent on the given changes, | |
783 // and the changes have invalidated it | |
784 bool check_dependency_on(DepChange& changes); | |
785 | |
786 // Evolution support. Tells if this compiled method is dependent on any of | |
787 // methods m() of class dependee, such that if m() in dependee is replaced, | |
788 // this compiled method will have to be deoptimized. | |
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789 bool is_evol_dependent_on(Klass* dependee); |
0 | 790 |
791 // Fast breakpoint support. Tells if this compiled method is | |
792 // dependent on the given method. Returns true if this nmethod | |
793 // corresponds to the given method as well. | |
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794 bool is_dependent_on_method(Method* dependee); |
0 | 795 |
796 // is it ok to patch at address? | |
797 bool is_patchable_at(address instr_address); | |
798 | |
799 // UseBiasedLocking support | |
2019 | 800 ByteSize native_receiver_sp_offset() { |
801 return _native_receiver_sp_offset; | |
0 | 802 } |
2019 | 803 ByteSize native_basic_lock_sp_offset() { |
804 return _native_basic_lock_sp_offset; | |
0 | 805 } |
806 | |
807 // support for code generation | |
808 static int verified_entry_point_offset() { return offset_of(nmethod, _verified_entry_point); } | |
809 static int osr_entry_point_offset() { return offset_of(nmethod, _osr_entry_point); } | |
810 static int entry_bci_offset() { return offset_of(nmethod, _entry_bci); } | |
811 | |
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812 // RedefineClasses support. Mark metadata in nmethods as on_stack so that |
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813 // redefine classes doesn't purge it. |
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814 static void mark_on_stack(nmethod* nm) { |
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815 nm->metadata_do(Metadata::mark_on_stack); |
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816 } |
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817 void metadata_do(void f(Metadata*)); |
0 | 818 }; |
819 | |
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820 // Locks an nmethod so its code will not get removed and it will not |
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821 // be made into a zombie, even if it is a not_entrant method. After the |
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822 // nmethod becomes a zombie, if CompiledMethodUnload event processing |
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823 // needs to be done, then lock_nmethod() is used directly to keep the |
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824 // generated code from being reused too early. |
0 | 825 class nmethodLocker : public StackObj { |
826 nmethod* _nm; | |
827 | |
2195
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828 public: |
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829 |
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830 // note: nm can be NULL |
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831 // Only JvmtiDeferredEvent::compiled_method_unload_event() |
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832 // should pass zombie_ok == true. |
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833 static void lock_nmethod(nmethod* nm, bool zombie_ok = false); |
0 | 834 static void unlock_nmethod(nmethod* nm); // (ditto) |
835 | |
836 nmethodLocker(address pc); // derive nm from pc | |
837 nmethodLocker(nmethod *nm) { _nm = nm; lock_nmethod(_nm); } | |
838 nmethodLocker() { _nm = NULL; } | |
839 ~nmethodLocker() { unlock_nmethod(_nm); } | |
840 | |
841 nmethod* code() { return _nm; } | |
842 void set_code(nmethod* new_nm) { | |
843 unlock_nmethod(_nm); // note: This works even if _nm==new_nm. | |
844 _nm = new_nm; | |
845 lock_nmethod(_nm); | |
846 } | |
847 }; | |
1972 | 848 |
849 #endif // SHARE_VM_CODE_NMETHOD_HPP |