Mercurial > hg > truffle
annotate src/share/vm/code/nmethod.hpp @ 1644:2a47bd84841f
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Reviewed-by: kvn
author | never |
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date | Thu, 08 Jul 2010 14:29:44 -0700 |
parents | 38e8278318ca |
children | 126ea7725993 |
rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2010, 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 | |
25 // This class is used internally by nmethods, to cache | |
26 // exception/pc/handler information. | |
27 | |
28 class ExceptionCache : public CHeapObj { | |
29 friend class VMStructs; | |
30 private: | |
31 static address _unwind_handler; | |
32 enum { cache_size = 16 }; | |
33 klassOop _exception_type; | |
34 address _pc[cache_size]; | |
35 address _handler[cache_size]; | |
36 int _count; | |
37 ExceptionCache* _next; | |
38 | |
39 address pc_at(int index) { assert(index >= 0 && index < count(),""); return _pc[index]; } | |
40 void set_pc_at(int index, address a) { assert(index >= 0 && index < cache_size,""); _pc[index] = a; } | |
41 address handler_at(int index) { assert(index >= 0 && index < count(),""); return _handler[index]; } | |
42 void set_handler_at(int index, address a) { assert(index >= 0 && index < cache_size,""); _handler[index] = a; } | |
43 int count() { return _count; } | |
44 void increment_count() { _count++; } | |
45 | |
46 public: | |
47 | |
48 ExceptionCache(Handle exception, address pc, address handler); | |
49 | |
50 klassOop exception_type() { return _exception_type; } | |
51 klassOop* exception_type_addr() { return &_exception_type; } | |
52 ExceptionCache* next() { return _next; } | |
53 void set_next(ExceptionCache *ec) { _next = ec; } | |
54 | |
55 address match(Handle exception, address pc); | |
56 bool match_exception_with_space(Handle exception) ; | |
57 address test_address(address addr); | |
58 bool add_address_and_handler(address addr, address handler) ; | |
59 | |
60 static address unwind_handler() { return _unwind_handler; } | |
61 }; | |
62 | |
63 | |
64 // cache pc descs found in earlier inquiries | |
65 class PcDescCache VALUE_OBJ_CLASS_SPEC { | |
66 friend class VMStructs; | |
67 private: | |
68 enum { cache_size = 4 }; | |
69 PcDesc* _last_pc_desc; // most recent pc_desc found | |
70 PcDesc* _pc_descs[cache_size]; // last cache_size pc_descs found | |
71 public: | |
72 PcDescCache() { debug_only(_last_pc_desc = NULL); } | |
73 void reset_to(PcDesc* initial_pc_desc); | |
74 PcDesc* find_pc_desc(int pc_offset, bool approximate); | |
75 void add_pc_desc(PcDesc* pc_desc); | |
76 PcDesc* last_pc_desc() { return _last_pc_desc; } | |
77 }; | |
78 | |
79 | |
80 // nmethods (native methods) are the compiled code versions of Java methods. | |
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81 // |
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82 // An nmethod contains: |
0 | 83 // - header (the nmethod structure) |
84 // [Relocation] | |
85 // - relocation information | |
86 // - constant part (doubles, longs and floats used in nmethod) | |
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87 // - oop table |
0 | 88 // [Code] |
89 // - code body | |
90 // - exception handler | |
91 // - stub code | |
92 // [Debugging information] | |
93 // - oop array | |
94 // - data array | |
95 // - pcs | |
96 // [Exception handler table] | |
97 // - handler entry point array | |
98 // [Implicit Null Pointer exception table] | |
99 // - implicit null table array | |
100 | |
101 class Dependencies; | |
102 class ExceptionHandlerTable; | |
103 class ImplicitExceptionTable; | |
104 class AbstractCompiler; | |
105 class xmlStream; | |
106 | |
107 class nmethod : public CodeBlob { | |
108 friend class VMStructs; | |
109 friend class NMethodSweeper; | |
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110 friend class CodeCache; // non-perm oops |
0 | 111 private: |
112 // Shared fields for all nmethod's | |
113 methodOop _method; | |
114 int _entry_bci; // != InvocationEntryBci if this nmethod is an on-stack replacement method | |
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115 jmethodID _jmethod_id; // Cache of method()->jmethod_id() |
0 | 116 |
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117 // To support simple linked-list chaining of nmethods: |
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118 nmethod* _osr_link; // from instanceKlass::osr_nmethods_head |
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119 nmethod* _scavenge_root_link; // from CodeCache::scavenge_root_nmethods |
1202 | 120 nmethod* _saved_nmethod_link; // from CodeCache::speculatively_disconnect |
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121 |
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122 static nmethod* volatile _oops_do_mark_nmethods; |
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123 nmethod* volatile _oops_do_mark_link; |
0 | 124 |
125 AbstractCompiler* _compiler; // The compiler which compiled this nmethod | |
126 | |
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127 // offsets for entry points |
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128 address _entry_point; // entry point with class check |
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129 address _verified_entry_point; // entry point without class check |
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130 address _osr_entry_point; // entry point for on stack replacement |
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131 |
0 | 132 // Offsets for different nmethod parts |
133 int _exception_offset; | |
1204 | 134 // All deoptee's will resume execution at this location described by |
135 // this offset. | |
0 | 136 int _deoptimize_offset; |
1204 | 137 // All deoptee's at a MethodHandle call site will resume execution |
138 // at this location described by this offset. | |
139 int _deoptimize_mh_offset; | |
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140 // Offset of the unwind handler if it exists |
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141 int _unwind_handler_offset; |
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142 |
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143 #ifdef HAVE_DTRACE_H |
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144 int _trap_offset; |
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145 #endif // def HAVE_DTRACE_H |
0 | 146 int _stub_offset; |
147 int _consts_offset; | |
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148 int _oops_offset; // offset to where embedded oop table begins (inside data) |
0 | 149 int _scopes_data_offset; |
150 int _scopes_pcs_offset; | |
151 int _dependencies_offset; | |
152 int _handler_table_offset; | |
153 int _nul_chk_table_offset; | |
154 int _nmethod_end_offset; | |
155 | |
156 // location in frame (offset for sp) that deopt can store the original | |
157 // pc during a deopt. | |
158 int _orig_pc_offset; | |
159 | |
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160 int _compile_id; // which compilation made this nmethod |
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161 int _comp_level; // compilation level |
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162 |
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163 // protected by CodeCache_lock |
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164 bool _has_flushed_dependencies; // Used for maintenance of dependencies (CodeCache_lock) |
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165 bool _speculatively_disconnected; // Marked for potential unload |
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166 |
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167 bool _marked_for_reclamation; // Used by NMethodSweeper (set only by sweeper) |
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168 bool _marked_for_deoptimization; // Used for stack deoptimization |
0 | 169 |
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170 // used by jvmti to track if an unload event has been posted for this nmethod. |
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171 bool _unload_reported; |
0 | 172 |
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173 // set during construction |
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174 unsigned int _has_unsafe_access:1; // May fault due to unsafe access. |
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175 unsigned int _has_method_handle_invokes:1; // Has this method MethodHandle invokes? |
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176 |
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177 // Protected by Patching_lock |
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178 unsigned char _state; // {alive, not_entrant, zombie, unloaded) |
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179 |
0 | 180 enum { alive = 0, |
605 | 181 not_entrant = 1, // uncommon trap has happened but activations may still exist |
0 | 182 zombie = 2, |
183 unloaded = 3 }; | |
184 | |
185 | |
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186 jbyte _scavenge_root_state; |
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187 |
0 | 188 NOT_PRODUCT(bool _has_debug_info; ) |
189 | |
190 // Nmethod Flushing lock (if non-zero, then the nmethod is not removed) | |
191 jint _lock_count; | |
192 | |
193 // not_entrant method removal. Each mark_sweep pass will update | |
194 // this mark to current sweep invocation count if it is seen on the | |
195 // stack. An not_entrant method can be removed when there is no | |
196 // more activations, i.e., when the _stack_traversal_mark is less than | |
197 // current sweep traversal index. | |
198 long _stack_traversal_mark; | |
199 | |
200 ExceptionCache *_exception_cache; | |
201 PcDescCache _pc_desc_cache; | |
202 | |
203 // These are only used for compiled synchronized native methods to | |
204 // locate the owner and stack slot for the BasicLock so that we can | |
205 // properly revoke the bias of the owner if necessary. They are | |
206 // needed because there is no debug information for compiled native | |
207 // wrappers and the oop maps are insufficient to allow | |
208 // frame::retrieve_receiver() to work. Currently they are expected | |
209 // to be byte offsets from the Java stack pointer for maximum code | |
210 // sharing between platforms. Note that currently biased locking | |
211 // will never cause Class instances to be biased but this code | |
212 // handles the static synchronized case as well. | |
213 ByteSize _compiled_synchronized_native_basic_lock_owner_sp_offset; | |
214 ByteSize _compiled_synchronized_native_basic_lock_sp_offset; | |
215 | |
216 friend class nmethodLocker; | |
217 | |
218 // For native wrappers | |
219 nmethod(methodOop method, | |
220 int nmethod_size, | |
221 CodeOffsets* offsets, | |
222 CodeBuffer *code_buffer, | |
223 int frame_size, | |
224 ByteSize basic_lock_owner_sp_offset, /* synchronized natives only */ | |
225 ByteSize basic_lock_sp_offset, /* synchronized natives only */ | |
226 OopMapSet* oop_maps); | |
227 | |
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228 #ifdef HAVE_DTRACE_H |
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229 // For native wrappers |
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230 nmethod(methodOop method, |
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231 int nmethod_size, |
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232 CodeOffsets* offsets, |
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233 CodeBuffer *code_buffer, |
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234 int frame_size); |
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235 #endif // def HAVE_DTRACE_H |
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236 |
0 | 237 // Creation support |
238 nmethod(methodOop method, | |
239 int nmethod_size, | |
240 int compile_id, | |
241 int entry_bci, | |
242 CodeOffsets* offsets, | |
243 int orig_pc_offset, | |
244 DebugInformationRecorder *recorder, | |
245 Dependencies* dependencies, | |
246 CodeBuffer *code_buffer, | |
247 int frame_size, | |
248 OopMapSet* oop_maps, | |
249 ExceptionHandlerTable* handler_table, | |
250 ImplicitExceptionTable* nul_chk_table, | |
251 AbstractCompiler* compiler, | |
252 int comp_level); | |
253 | |
254 // helper methods | |
255 void* operator new(size_t size, int nmethod_size); | |
256 | |
257 const char* reloc_string_for(u_char* begin, u_char* end); | |
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258 // Returns true if this thread changed the state of the nmethod or |
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259 // false if another thread performed the transition. |
1141 | 260 bool make_not_entrant_or_zombie(unsigned int state); |
0 | 261 void inc_decompile_count(); |
262 | |
263 // Used to manipulate the exception cache | |
264 void add_exception_cache_entry(ExceptionCache* new_entry); | |
265 ExceptionCache* exception_cache_entry_for_exception(Handle exception); | |
266 | |
267 // Inform external interfaces that a compiled method has been unloaded | |
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268 void post_compiled_method_unload(); |
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269 |
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270 // Initailize fields to their default values |
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271 void init_defaults(); |
0 | 272 |
273 public: | |
274 // create nmethod with entry_bci | |
275 static nmethod* new_nmethod(methodHandle method, | |
276 int compile_id, | |
277 int entry_bci, | |
278 CodeOffsets* offsets, | |
279 int orig_pc_offset, | |
280 DebugInformationRecorder* recorder, | |
281 Dependencies* dependencies, | |
282 CodeBuffer *code_buffer, | |
283 int frame_size, | |
284 OopMapSet* oop_maps, | |
285 ExceptionHandlerTable* handler_table, | |
286 ImplicitExceptionTable* nul_chk_table, | |
287 AbstractCompiler* compiler, | |
288 int comp_level); | |
289 | |
290 static nmethod* new_native_nmethod(methodHandle method, | |
291 CodeBuffer *code_buffer, | |
292 int vep_offset, | |
293 int frame_complete, | |
294 int frame_size, | |
295 ByteSize receiver_sp_offset, | |
296 ByteSize basic_lock_sp_offset, | |
297 OopMapSet* oop_maps); | |
298 | |
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299 #ifdef HAVE_DTRACE_H |
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300 // The method we generate for a dtrace probe has to look |
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301 // like an nmethod as far as the rest of the system is concerned |
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302 // which is somewhat unfortunate. |
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303 static nmethod* new_dtrace_nmethod(methodHandle method, |
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304 CodeBuffer *code_buffer, |
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305 int vep_offset, |
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306 int trap_offset, |
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307 int frame_complete, |
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308 int frame_size); |
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309 |
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310 int trap_offset() const { return _trap_offset; } |
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311 address trap_address() const { return code_begin() + _trap_offset; } |
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312 |
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313 #endif // def HAVE_DTRACE_H |
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314 |
0 | 315 // accessors |
316 methodOop method() const { return _method; } | |
317 AbstractCompiler* compiler() const { return _compiler; } | |
318 | |
319 #ifndef PRODUCT | |
320 bool has_debug_info() const { return _has_debug_info; } | |
321 void set_has_debug_info(bool f) { _has_debug_info = false; } | |
322 #endif // NOT PRODUCT | |
323 | |
324 // type info | |
325 bool is_nmethod() const { return true; } | |
326 bool is_java_method() const { return !method()->is_native(); } | |
327 bool is_native_method() const { return method()->is_native(); } | |
328 bool is_osr_method() const { return _entry_bci != InvocationEntryBci; } | |
329 | |
330 bool is_compiled_by_c1() const; | |
331 bool is_compiled_by_c2() const; | |
332 | |
333 // boundaries for different parts | |
1204 | 334 address code_begin () const { return _entry_point; } |
335 address code_end () const { return header_begin() + _stub_offset ; } | |
336 address exception_begin () const { return header_begin() + _exception_offset ; } | |
337 address deopt_handler_begin () const { return header_begin() + _deoptimize_offset ; } | |
338 address deopt_mh_handler_begin() const { return header_begin() + _deoptimize_mh_offset ; } | |
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339 address unwind_handler_begin () const { return _unwind_handler_offset != -1 ? (header_begin() + _unwind_handler_offset) : NULL; } |
1204 | 340 address stub_begin () const { return header_begin() + _stub_offset ; } |
341 address stub_end () const { return header_begin() + _consts_offset ; } | |
342 address consts_begin () const { return header_begin() + _consts_offset ; } | |
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343 address consts_end () const { return header_begin() + _oops_offset ; } |
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344 oop* oops_begin () const { return (oop*) (header_begin() + _oops_offset) ; } |
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345 oop* oops_end () const { return (oop*) (header_begin() + _scopes_data_offset) ; } |
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346 |
1204 | 347 address scopes_data_begin () const { return header_begin() + _scopes_data_offset ; } |
348 address scopes_data_end () const { return header_begin() + _scopes_pcs_offset ; } | |
349 PcDesc* scopes_pcs_begin () const { return (PcDesc*)(header_begin() + _scopes_pcs_offset ); } | |
350 PcDesc* scopes_pcs_end () const { return (PcDesc*)(header_begin() + _dependencies_offset) ; } | |
351 address dependencies_begin () const { return header_begin() + _dependencies_offset ; } | |
352 address dependencies_end () const { return header_begin() + _handler_table_offset ; } | |
353 address handler_table_begin () const { return header_begin() + _handler_table_offset ; } | |
354 address handler_table_end () const { return header_begin() + _nul_chk_table_offset ; } | |
355 address nul_chk_table_begin () const { return header_begin() + _nul_chk_table_offset ; } | |
356 address nul_chk_table_end () const { return header_begin() + _nmethod_end_offset ; } | |
0 | 357 |
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358 // Sizes |
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359 int code_size () const { return code_end () - code_begin (); } |
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360 int stub_size () const { return stub_end () - stub_begin (); } |
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361 int consts_size () const { return consts_end () - consts_begin (); } |
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362 int oops_size () const { return (address) oops_end () - (address) oops_begin (); } |
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363 int scopes_data_size () const { return scopes_data_end () - scopes_data_begin (); } |
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364 int scopes_pcs_size () const { return (intptr_t) scopes_pcs_end () - (intptr_t) scopes_pcs_begin (); } |
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365 int dependencies_size () const { return dependencies_end () - dependencies_begin (); } |
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366 int handler_table_size() const { return handler_table_end() - handler_table_begin(); } |
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367 int nul_chk_table_size() const { return nul_chk_table_end() - nul_chk_table_begin(); } |
0 | 368 |
369 int total_size () const; | |
370 | |
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371 // Containment |
0 | 372 bool code_contains (address addr) const { return code_begin () <= addr && addr < code_end (); } |
373 bool stub_contains (address addr) const { return stub_begin () <= addr && addr < stub_end (); } | |
374 bool consts_contains (address addr) const { return consts_begin () <= addr && addr < consts_end (); } | |
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375 bool oops_contains (oop* addr) const { return oops_begin () <= addr && addr < oops_end (); } |
0 | 376 bool scopes_data_contains (address addr) const { return scopes_data_begin () <= addr && addr < scopes_data_end (); } |
377 bool scopes_pcs_contains (PcDesc* addr) const { return scopes_pcs_begin () <= addr && addr < scopes_pcs_end (); } | |
378 bool handler_table_contains(address addr) const { return handler_table_begin() <= addr && addr < handler_table_end(); } | |
379 bool nul_chk_table_contains(address addr) const { return nul_chk_table_begin() <= addr && addr < nul_chk_table_end(); } | |
380 | |
381 // entry points | |
382 address entry_point() const { return _entry_point; } // normal entry point | |
383 address verified_entry_point() const { return _verified_entry_point; } // if klass is correct | |
384 | |
385 // flag accessing and manipulation | |
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386 bool is_in_use() const { return _state == alive; } |
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387 bool is_alive() const { return _state == alive || _state == not_entrant; } |
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388 bool is_not_entrant() const { return _state == not_entrant; } |
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389 bool is_zombie() const { return _state == zombie; } |
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390 bool is_unloaded() const { return _state == unloaded; } |
0 | 391 |
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392 // Make the nmethod non entrant. The nmethod will continue to be |
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393 // alive. It is used when an uncommon trap happens. Returns true |
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394 // if this thread changed the state of the nmethod or false if |
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395 // another thread performed the transition. |
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396 bool make_not_entrant() { return make_not_entrant_or_zombie(not_entrant); } |
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397 bool make_zombie() { return make_not_entrant_or_zombie(zombie); } |
0 | 398 |
399 // used by jvmti to track if the unload event has been reported | |
400 bool unload_reported() { return _unload_reported; } | |
401 void set_unload_reported() { _unload_reported = true; } | |
402 | |
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403 bool is_marked_for_deoptimization() const { return _marked_for_deoptimization; } |
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404 void mark_for_deoptimization() { _marked_for_deoptimization = true; } |
0 | 405 |
406 void make_unloaded(BoolObjectClosure* is_alive, oop cause); | |
407 | |
408 bool has_dependencies() { return dependencies_size() != 0; } | |
409 void flush_dependencies(BoolObjectClosure* is_alive); | |
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410 bool has_flushed_dependencies() { return _has_flushed_dependencies; } |
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411 void set_has_flushed_dependencies() { |
0 | 412 assert(!has_flushed_dependencies(), "should only happen once"); |
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413 _has_flushed_dependencies = 1; |
0 | 414 } |
415 | |
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416 bool is_marked_for_reclamation() const { return _marked_for_reclamation; } |
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417 void mark_for_reclamation() { _marked_for_reclamation = 1; } |
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418 |
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419 bool has_unsafe_access() const { return _has_unsafe_access; } |
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420 void set_has_unsafe_access(bool z) { _has_unsafe_access = z; } |
0 | 421 |
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422 bool has_method_handle_invokes() const { return _has_method_handle_invokes; } |
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423 void set_has_method_handle_invokes(bool z) { _has_method_handle_invokes = z; } |
0 | 424 |
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425 bool is_speculatively_disconnected() const { return _speculatively_disconnected; } |
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426 void set_speculatively_disconnected(bool z) { _speculatively_disconnected = z; } |
1202 | 427 |
0 | 428 int comp_level() const { return _comp_level; } |
429 | |
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430 // Support for oops in scopes and relocs: |
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431 // Note: index 0 is reserved for null. |
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432 oop oop_at(int index) const { return index == 0 ? (oop) NULL: *oop_addr_at(index); } |
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433 oop* oop_addr_at(int index) const { // for GC |
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434 // relocation indexes are biased by 1 (because 0 is reserved) |
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435 assert(index > 0 && index <= oops_size(), "must be a valid non-zero index"); |
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436 return &oops_begin()[index - 1]; |
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437 } |
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438 |
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439 void copy_oops(GrowableArray<jobject>* oops); |
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440 |
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441 // Relocation support |
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442 private: |
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443 void fix_oop_relocations(address begin, address end, bool initialize_immediates); |
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444 inline void initialize_immediate_oop(oop* dest, jobject handle); |
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445 |
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446 public: |
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447 void fix_oop_relocations(address begin, address end) { fix_oop_relocations(begin, end, false); } |
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448 void fix_oop_relocations() { fix_oop_relocations(NULL, NULL, false); } |
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449 |
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450 bool is_at_poll_return(address pc); |
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451 bool is_at_poll_or_poll_return(address pc); |
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452 |
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453 // Non-perm oop support |
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454 bool on_scavenge_root_list() const { return (_scavenge_root_state & 1) != 0; } |
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455 protected: |
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456 enum { npl_on_list = 0x01, npl_marked = 0x10 }; |
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457 void set_on_scavenge_root_list() { _scavenge_root_state = npl_on_list; } |
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458 void clear_on_scavenge_root_list() { _scavenge_root_state = 0; } |
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459 // assertion-checking and pruning logic uses the bits of _scavenge_root_state |
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460 #ifndef PRODUCT |
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461 void set_scavenge_root_marked() { _scavenge_root_state |= npl_marked; } |
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462 void clear_scavenge_root_marked() { _scavenge_root_state &= ~npl_marked; } |
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463 bool scavenge_root_not_marked() { return (_scavenge_root_state &~ npl_on_list) == 0; } |
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464 // N.B. there is no positive marked query, and we only use the not_marked query for asserts. |
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465 #endif //PRODUCT |
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466 nmethod* scavenge_root_link() const { return _scavenge_root_link; } |
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467 void set_scavenge_root_link(nmethod *n) { _scavenge_root_link = n; } |
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468 |
1202 | 469 nmethod* saved_nmethod_link() const { return _saved_nmethod_link; } |
470 void set_saved_nmethod_link(nmethod *n) { _saved_nmethod_link = n; } | |
471 | |
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472 public: |
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473 |
0 | 474 // Sweeper support |
475 long stack_traversal_mark() { return _stack_traversal_mark; } | |
476 void set_stack_traversal_mark(long l) { _stack_traversal_mark = l; } | |
477 | |
478 // Exception cache support | |
479 ExceptionCache* exception_cache() const { return _exception_cache; } | |
480 void set_exception_cache(ExceptionCache *ec) { _exception_cache = ec; } | |
481 address handler_for_exception_and_pc(Handle exception, address pc); | |
482 void add_handler_for_exception_and_pc(Handle exception, address pc, address handler); | |
483 void remove_from_exception_cache(ExceptionCache* ec); | |
484 | |
485 // implicit exceptions support | |
486 address continuation_for_implicit_exception(address pc); | |
487 | |
488 // On-stack replacement support | |
489 int osr_entry_bci() const { assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); return _entry_bci; } | |
490 address osr_entry() const { assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); return _osr_entry_point; } | |
491 void invalidate_osr_method(); | |
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492 nmethod* osr_link() const { return _osr_link; } |
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493 void set_osr_link(nmethod *n) { _osr_link = n; } |
0 | 494 |
495 // tells whether frames described by this nmethod can be deoptimized | |
496 // note: native wrappers cannot be deoptimized. | |
497 bool can_be_deoptimized() const { return is_java_method(); } | |
498 | |
499 // Inline cache support | |
500 void clear_inline_caches(); | |
501 void cleanup_inline_caches(); | |
502 bool inlinecache_check_contains(address addr) const { | |
503 return (addr >= instructions_begin() && addr < verified_entry_point()); | |
504 } | |
505 | |
506 // unlink and deallocate this nmethod | |
507 // Only NMethodSweeper class is expected to use this. NMethodSweeper is not | |
508 // expected to use any other private methods/data in this class. | |
509 | |
510 protected: | |
511 void flush(); | |
512 | |
513 public: | |
514 // If returning true, it is unsafe to remove this nmethod even though it is a zombie | |
515 // nmethod, since the VM might have a reference to it. Should only be called from a safepoint. | |
516 bool is_locked_by_vm() const { return _lock_count >0; } | |
517 | |
518 // See comment at definition of _last_seen_on_stack | |
519 void mark_as_seen_on_stack(); | |
520 bool can_not_entrant_be_converted(); | |
521 | |
522 // Evolution support. We make old (discarded) compiled methods point to new methodOops. | |
523 void set_method(methodOop method) { _method = method; } | |
524 | |
525 // GC support | |
526 void do_unloading(BoolObjectClosure* is_alive, OopClosure* keep_alive, | |
527 bool unloading_occurred); | |
528 bool can_unload(BoolObjectClosure* is_alive, OopClosure* keep_alive, | |
529 oop* root, bool unloading_occurred); | |
530 | |
531 void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, | |
532 OopClosure* f); | |
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533 void oops_do(OopClosure* f) { oops_do(f, false); } |
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534 void oops_do(OopClosure* f, bool do_strong_roots_only); |
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535 bool detect_scavenge_root_oops(); |
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536 void verify_scavenge_root_oops() PRODUCT_RETURN; |
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537 |
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538 bool test_set_oops_do_mark(); |
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539 static void oops_do_marking_prologue(); |
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540 static void oops_do_marking_epilogue(); |
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541 static bool oops_do_marking_is_active() { return _oops_do_mark_nmethods != NULL; } |
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542 DEBUG_ONLY(bool test_oops_do_mark() { return _oops_do_mark_link != NULL; }) |
0 | 543 |
544 // ScopeDesc for an instruction | |
545 ScopeDesc* scope_desc_at(address pc); | |
546 | |
547 private: | |
548 ScopeDesc* scope_desc_in(address begin, address end); | |
549 | |
1204 | 550 address* orig_pc_addr(const frame* fr) { return (address*) ((address)fr->unextended_sp() + _orig_pc_offset); } |
0 | 551 |
552 PcDesc* find_pc_desc_internal(address pc, bool approximate); | |
553 | |
554 PcDesc* find_pc_desc(address pc, bool approximate) { | |
555 PcDesc* desc = _pc_desc_cache.last_pc_desc(); | |
556 if (desc != NULL && desc->pc_offset() == pc - instructions_begin()) { | |
557 return desc; | |
558 } | |
559 return find_pc_desc_internal(pc, approximate); | |
560 } | |
561 | |
562 public: | |
563 // ScopeDesc retrieval operation | |
564 PcDesc* pc_desc_at(address pc) { return find_pc_desc(pc, false); } | |
565 // pc_desc_near returns the first PcDesc at or after the givne pc. | |
566 PcDesc* pc_desc_near(address pc) { return find_pc_desc(pc, true); } | |
567 | |
568 public: | |
569 // copying of debugging information | |
570 void copy_scopes_pcs(PcDesc* pcs, int count); | |
571 void copy_scopes_data(address buffer, int size); | |
572 | |
1204 | 573 // Deopt |
574 // Return true is the PC is one would expect if the frame is being deopted. | |
575 bool is_deopt_pc (address pc) { return is_deopt_entry(pc) || is_deopt_mh_entry(pc); } | |
576 bool is_deopt_entry (address pc) { return pc == deopt_handler_begin(); } | |
577 bool is_deopt_mh_entry(address pc) { return pc == deopt_mh_handler_begin(); } | |
0 | 578 // Accessor/mutator for the original pc of a frame before a frame was deopted. |
579 address get_original_pc(const frame* fr) { return *orig_pc_addr(fr); } | |
580 void set_original_pc(const frame* fr, address pc) { *orig_pc_addr(fr) = pc; } | |
581 | |
1204 | 582 static address get_deopt_original_pc(const frame* fr); |
583 | |
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584 // MethodHandle |
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585 bool is_method_handle_return(address return_pc); |
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586 |
0 | 587 // jvmti support: |
588 void post_compiled_method_load_event(); | |
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589 jmethodID get_and_cache_jmethod_id(); |
0 | 590 |
591 // verify operations | |
592 void verify(); | |
593 void verify_scopes(); | |
594 void verify_interrupt_point(address interrupt_point); | |
595 | |
596 // printing support | |
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597 void print() const; |
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598 void print_code(); |
0 | 599 void print_relocations() PRODUCT_RETURN; |
600 void print_pcs() PRODUCT_RETURN; | |
601 void print_scopes() PRODUCT_RETURN; | |
602 void print_dependencies() PRODUCT_RETURN; | |
603 void print_value_on(outputStream* st) const PRODUCT_RETURN; | |
604 void print_calls(outputStream* st) PRODUCT_RETURN; | |
605 void print_handler_table() PRODUCT_RETURN; | |
606 void print_nul_chk_table() PRODUCT_RETURN; | |
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607 void print_nmethod(bool print_code); |
0 | 608 |
609 void print_on(outputStream* st, const char* title) const; | |
610 | |
611 // Logging | |
612 void log_identity(xmlStream* log) const; | |
613 void log_new_nmethod() const; | |
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614 void log_state_change() const; |
0 | 615 |
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616 // Prints block-level comments, including nmethod specific block labels: |
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617 virtual void print_block_comment(outputStream* stream, address block_begin) { |
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618 print_nmethod_labels(stream, block_begin); |
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619 CodeBlob::print_block_comment(stream, block_begin); |
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620 } |
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621 void print_nmethod_labels(outputStream* stream, address block_begin); |
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622 |
0 | 623 // Prints a comment for one native instruction (reloc info, pc desc) |
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624 void print_code_comment_on(outputStream* st, int column, address begin, address end); |
0 | 625 static void print_statistics() PRODUCT_RETURN; |
626 | |
627 // Compiler task identification. Note that all OSR methods | |
628 // are numbered in an independent sequence if CICountOSR is true, | |
629 // and native method wrappers are also numbered independently if | |
630 // CICountNative is true. | |
631 int compile_id() const { return _compile_id; } | |
632 const char* compile_kind() const; | |
633 | |
634 // For debugging | |
635 // CompiledIC* IC_at(char* p) const; | |
636 // PrimitiveIC* primitiveIC_at(char* p) const; | |
637 oop embeddedOop_at(address p); | |
638 | |
639 // tells if any of this method's dependencies have been invalidated | |
640 // (this is expensive!) | |
641 bool check_all_dependencies(); | |
642 | |
643 // tells if this compiled method is dependent on the given changes, | |
644 // and the changes have invalidated it | |
645 bool check_dependency_on(DepChange& changes); | |
646 | |
647 // Evolution support. Tells if this compiled method is dependent on any of | |
648 // methods m() of class dependee, such that if m() in dependee is replaced, | |
649 // this compiled method will have to be deoptimized. | |
650 bool is_evol_dependent_on(klassOop dependee); | |
651 | |
652 // Fast breakpoint support. Tells if this compiled method is | |
653 // dependent on the given method. Returns true if this nmethod | |
654 // corresponds to the given method as well. | |
655 bool is_dependent_on_method(methodOop dependee); | |
656 | |
657 // is it ok to patch at address? | |
658 bool is_patchable_at(address instr_address); | |
659 | |
660 // UseBiasedLocking support | |
661 ByteSize compiled_synchronized_native_basic_lock_owner_sp_offset() { | |
662 return _compiled_synchronized_native_basic_lock_owner_sp_offset; | |
663 } | |
664 ByteSize compiled_synchronized_native_basic_lock_sp_offset() { | |
665 return _compiled_synchronized_native_basic_lock_sp_offset; | |
666 } | |
667 | |
668 // support for code generation | |
669 static int verified_entry_point_offset() { return offset_of(nmethod, _verified_entry_point); } | |
670 static int osr_entry_point_offset() { return offset_of(nmethod, _osr_entry_point); } | |
671 static int entry_bci_offset() { return offset_of(nmethod, _entry_bci); } | |
672 | |
673 }; | |
674 | |
675 // Locks an nmethod so its code will not get removed, even if it is a zombie/not_entrant method | |
676 class nmethodLocker : public StackObj { | |
677 nmethod* _nm; | |
678 | |
679 static void lock_nmethod(nmethod* nm); // note: nm can be NULL | |
680 static void unlock_nmethod(nmethod* nm); // (ditto) | |
681 | |
682 public: | |
683 nmethodLocker(address pc); // derive nm from pc | |
684 nmethodLocker(nmethod *nm) { _nm = nm; lock_nmethod(_nm); } | |
685 nmethodLocker() { _nm = NULL; } | |
686 ~nmethodLocker() { unlock_nmethod(_nm); } | |
687 | |
688 nmethod* code() { return _nm; } | |
689 void set_code(nmethod* new_nm) { | |
690 unlock_nmethod(_nm); // note: This works even if _nm==new_nm. | |
691 _nm = new_nm; | |
692 lock_nmethod(_nm); | |
693 } | |
694 }; |