author | iveresov |
Fri, 03 Sep 2010 17:51:07 -0700 | |
changeset 6453 | 970dc585ab63 |
parent 6432 | d36e09b60939 |
child 7397 | 5b173b4ca846 |
permissions | -rw-r--r-- |
1 | 1 |
/* |
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* Copyright (c) 1997, 2010, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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* |
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*/ |
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||
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// This class is used internally by nmethods, to cache |
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// exception/pc/handler information. |
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class ExceptionCache : public CHeapObj { |
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friend class VMStructs; |
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private: |
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static address _unwind_handler; |
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enum { cache_size = 16 }; |
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klassOop _exception_type; |
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address _pc[cache_size]; |
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address _handler[cache_size]; |
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int _count; |
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ExceptionCache* _next; |
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address pc_at(int index) { assert(index >= 0 && index < count(),""); return _pc[index]; } |
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void set_pc_at(int index, address a) { assert(index >= 0 && index < cache_size,""); _pc[index] = a; } |
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address handler_at(int index) { assert(index >= 0 && index < count(),""); return _handler[index]; } |
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void set_handler_at(int index, address a) { assert(index >= 0 && index < cache_size,""); _handler[index] = a; } |
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int count() { return _count; } |
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void increment_count() { _count++; } |
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public: |
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ExceptionCache(Handle exception, address pc, address handler); |
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klassOop exception_type() { return _exception_type; } |
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klassOop* exception_type_addr() { return &_exception_type; } |
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ExceptionCache* next() { return _next; } |
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void set_next(ExceptionCache *ec) { _next = ec; } |
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address match(Handle exception, address pc); |
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bool match_exception_with_space(Handle exception) ; |
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address test_address(address addr); |
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bool add_address_and_handler(address addr, address handler) ; |
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static address unwind_handler() { return _unwind_handler; } |
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}; |
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// cache pc descs found in earlier inquiries |
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class PcDescCache VALUE_OBJ_CLASS_SPEC { |
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friend class VMStructs; |
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private: |
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enum { cache_size = 4 }; |
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PcDesc* _last_pc_desc; // most recent pc_desc found |
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PcDesc* _pc_descs[cache_size]; // last cache_size pc_descs found |
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public: |
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PcDescCache() { debug_only(_last_pc_desc = NULL); } |
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void reset_to(PcDesc* initial_pc_desc); |
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PcDesc* find_pc_desc(int pc_offset, bool approximate); |
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void add_pc_desc(PcDesc* pc_desc); |
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PcDesc* last_pc_desc() { return _last_pc_desc; } |
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}; |
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// nmethods (native methods) are the compiled code versions of Java methods. |
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// |
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// An nmethod contains: |
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// - header (the nmethod structure) |
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// [Relocation] |
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// - relocation information |
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// - constant part (doubles, longs and floats used in nmethod) |
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// - oop table |
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// [Code] |
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// - code body |
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// - exception handler |
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// - stub code |
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// [Debugging information] |
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// - oop array |
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// - data array |
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// - pcs |
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// [Exception handler table] |
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// - handler entry point array |
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// [Implicit Null Pointer exception table] |
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// - implicit null table array |
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class Dependencies; |
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class ExceptionHandlerTable; |
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class ImplicitExceptionTable; |
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class AbstractCompiler; |
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class xmlStream; |
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class nmethod : public CodeBlob { |
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friend class VMStructs; |
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friend class NMethodSweeper; |
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friend class CodeCache; // non-perm oops |
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private: |
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// Shared fields for all nmethod's |
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methodOop _method; |
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int _entry_bci; // != InvocationEntryBci if this nmethod is an on-stack replacement method |
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jmethodID _jmethod_id; // Cache of method()->jmethod_id() |
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// To support simple linked-list chaining of nmethods: |
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nmethod* _osr_link; // from instanceKlass::osr_nmethods_head |
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nmethod* _scavenge_root_link; // from CodeCache::scavenge_root_nmethods |
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nmethod* _saved_nmethod_link; // from CodeCache::speculatively_disconnect |
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static nmethod* volatile _oops_do_mark_nmethods; |
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nmethod* volatile _oops_do_mark_link; |
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AbstractCompiler* _compiler; // The compiler which compiled this nmethod |
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// offsets for entry points |
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address _entry_point; // entry point with class check |
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address _verified_entry_point; // entry point without class check |
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address _osr_entry_point; // entry point for on stack replacement |
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// Offsets for different nmethod parts |
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int _exception_offset; |
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// All deoptee's will resume execution at this location described by |
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// this offset. |
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int _deoptimize_offset; |
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// All deoptee's at a MethodHandle call site will resume execution |
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// at this location described by this offset. |
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int _deoptimize_mh_offset; |
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// Offset of the unwind handler if it exists |
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int _unwind_handler_offset; |
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#ifdef HAVE_DTRACE_H |
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int _trap_offset; |
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#endif // def HAVE_DTRACE_H |
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int _consts_offset; |
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int _stub_offset; |
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int _oops_offset; // offset to where embedded oop table begins (inside data) |
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int _scopes_data_offset; |
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int _scopes_pcs_offset; |
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int _dependencies_offset; |
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int _handler_table_offset; |
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int _nul_chk_table_offset; |
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int _nmethod_end_offset; |
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// location in frame (offset for sp) that deopt can store the original |
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// pc during a deopt. |
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int _orig_pc_offset; |
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int _compile_id; // which compilation made this nmethod |
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int _comp_level; // compilation level |
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// protected by CodeCache_lock |
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bool _has_flushed_dependencies; // Used for maintenance of dependencies (CodeCache_lock) |
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bool _speculatively_disconnected; // Marked for potential unload |
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bool _marked_for_reclamation; // Used by NMethodSweeper (set only by sweeper) |
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bool _marked_for_deoptimization; // Used for stack deoptimization |
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// used by jvmti to track if an unload event has been posted for this nmethod. |
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bool _unload_reported; |
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// set during construction |
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unsigned int _has_unsafe_access:1; // May fault due to unsafe access. |
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unsigned int _has_method_handle_invokes:1; // Has this method MethodHandle invokes? |
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// Protected by Patching_lock |
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unsigned char _state; // {alive, not_entrant, zombie, unloaded) |
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#ifdef ASSERT |
181 |
bool _oops_are_stale; // indicates that it's no longer safe to access oops section |
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182 |
#endif |
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183 |
||
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enum { alive = 0, |
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not_entrant = 1, // uncommon trap has happened but activations may still exist |
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zombie = 2, |
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unloaded = 3 }; |
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||
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jbyte _scavenge_root_state; |
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|
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NOT_PRODUCT(bool _has_debug_info; ) |
193 |
||
194 |
// Nmethod Flushing lock (if non-zero, then the nmethod is not removed) |
|
195 |
jint _lock_count; |
|
196 |
||
197 |
// not_entrant method removal. Each mark_sweep pass will update |
|
198 |
// this mark to current sweep invocation count if it is seen on the |
|
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// stack. An not_entrant method can be removed when there is no |
|
200 |
// more activations, i.e., when the _stack_traversal_mark is less than |
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// current sweep traversal index. |
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202 |
long _stack_traversal_mark; |
|
203 |
||
204 |
ExceptionCache *_exception_cache; |
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PcDescCache _pc_desc_cache; |
|
206 |
||
207 |
// These are only used for compiled synchronized native methods to |
|
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// locate the owner and stack slot for the BasicLock so that we can |
|
209 |
// properly revoke the bias of the owner if necessary. They are |
|
210 |
// needed because there is no debug information for compiled native |
|
211 |
// wrappers and the oop maps are insufficient to allow |
|
212 |
// frame::retrieve_receiver() to work. Currently they are expected |
|
213 |
// to be byte offsets from the Java stack pointer for maximum code |
|
214 |
// sharing between platforms. Note that currently biased locking |
|
215 |
// will never cause Class instances to be biased but this code |
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216 |
// handles the static synchronized case as well. |
|
217 |
ByteSize _compiled_synchronized_native_basic_lock_owner_sp_offset; |
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218 |
ByteSize _compiled_synchronized_native_basic_lock_sp_offset; |
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219 |
||
220 |
friend class nmethodLocker; |
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221 |
||
222 |
// For native wrappers |
|
223 |
nmethod(methodOop method, |
|
224 |
int nmethod_size, |
|
225 |
CodeOffsets* offsets, |
|
226 |
CodeBuffer *code_buffer, |
|
227 |
int frame_size, |
|
228 |
ByteSize basic_lock_owner_sp_offset, /* synchronized natives only */ |
|
229 |
ByteSize basic_lock_sp_offset, /* synchronized natives only */ |
|
230 |
OopMapSet* oop_maps); |
|
231 |
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#ifdef HAVE_DTRACE_H |
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// For native wrappers |
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nmethod(methodOop method, |
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int nmethod_size, |
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CodeOffsets* offsets, |
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CodeBuffer *code_buffer, |
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int frame_size); |
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#endif // def HAVE_DTRACE_H |
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|
1 | 241 |
// Creation support |
242 |
nmethod(methodOop method, |
|
243 |
int nmethod_size, |
|
244 |
int compile_id, |
|
245 |
int entry_bci, |
|
246 |
CodeOffsets* offsets, |
|
247 |
int orig_pc_offset, |
|
248 |
DebugInformationRecorder *recorder, |
|
249 |
Dependencies* dependencies, |
|
250 |
CodeBuffer *code_buffer, |
|
251 |
int frame_size, |
|
252 |
OopMapSet* oop_maps, |
|
253 |
ExceptionHandlerTable* handler_table, |
|
254 |
ImplicitExceptionTable* nul_chk_table, |
|
255 |
AbstractCompiler* compiler, |
|
256 |
int comp_level); |
|
257 |
||
258 |
// helper methods |
|
259 |
void* operator new(size_t size, int nmethod_size); |
|
260 |
||
261 |
const char* reloc_string_for(u_char* begin, u_char* end); |
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// Returns true if this thread changed the state of the nmethod or |
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// false if another thread performed the transition. |
4570 | 264 |
bool make_not_entrant_or_zombie(unsigned int state); |
1 | 265 |
void inc_decompile_count(); |
266 |
||
267 |
// Used to manipulate the exception cache |
|
268 |
void add_exception_cache_entry(ExceptionCache* new_entry); |
|
269 |
ExceptionCache* exception_cache_entry_for_exception(Handle exception); |
|
270 |
||
271 |
// Inform external interfaces that a compiled method has been unloaded |
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void post_compiled_method_unload(); |
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274 |
// Initailize fields to their default values |
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275 |
void init_defaults(); |
1 | 276 |
|
277 |
public: |
|
278 |
// create nmethod with entry_bci |
|
279 |
static nmethod* new_nmethod(methodHandle method, |
|
280 |
int compile_id, |
|
281 |
int entry_bci, |
|
282 |
CodeOffsets* offsets, |
|
283 |
int orig_pc_offset, |
|
284 |
DebugInformationRecorder* recorder, |
|
285 |
Dependencies* dependencies, |
|
286 |
CodeBuffer *code_buffer, |
|
287 |
int frame_size, |
|
288 |
OopMapSet* oop_maps, |
|
289 |
ExceptionHandlerTable* handler_table, |
|
290 |
ImplicitExceptionTable* nul_chk_table, |
|
291 |
AbstractCompiler* compiler, |
|
292 |
int comp_level); |
|
293 |
||
294 |
static nmethod* new_native_nmethod(methodHandle method, |
|
295 |
CodeBuffer *code_buffer, |
|
296 |
int vep_offset, |
|
297 |
int frame_complete, |
|
298 |
int frame_size, |
|
299 |
ByteSize receiver_sp_offset, |
|
300 |
ByteSize basic_lock_sp_offset, |
|
301 |
OopMapSet* oop_maps); |
|
302 |
||
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303 |
#ifdef HAVE_DTRACE_H |
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304 |
// The method we generate for a dtrace probe has to look |
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305 |
// like an nmethod as far as the rest of the system is concerned |
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306 |
// which is somewhat unfortunate. |
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307 |
static nmethod* new_dtrace_nmethod(methodHandle method, |
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308 |
CodeBuffer *code_buffer, |
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309 |
int vep_offset, |
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310 |
int trap_offset, |
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311 |
int frame_complete, |
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312 |
int frame_size); |
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|
313 |
|
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314 |
int trap_offset() const { return _trap_offset; } |
6418 | 315 |
address trap_address() const { return insts_begin() + _trap_offset; } |
363
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|
316 |
|
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317 |
#endif // def HAVE_DTRACE_H |
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318 |
|
1 | 319 |
// accessors |
320 |
methodOop method() const { return _method; } |
|
321 |
AbstractCompiler* compiler() const { return _compiler; } |
|
322 |
||
323 |
#ifndef PRODUCT |
|
324 |
bool has_debug_info() const { return _has_debug_info; } |
|
325 |
void set_has_debug_info(bool f) { _has_debug_info = false; } |
|
326 |
#endif // NOT PRODUCT |
|
327 |
||
328 |
// type info |
|
329 |
bool is_nmethod() const { return true; } |
|
330 |
bool is_java_method() const { return !method()->is_native(); } |
|
331 |
bool is_native_method() const { return method()->is_native(); } |
|
332 |
bool is_osr_method() const { return _entry_bci != InvocationEntryBci; } |
|
333 |
||
334 |
bool is_compiled_by_c1() const; |
|
335 |
bool is_compiled_by_c2() const; |
|
6187 | 336 |
bool is_compiled_by_shark() const; |
1 | 337 |
|
338 |
// boundaries for different parts |
|
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339 |
address consts_begin () const { return header_begin() + _consts_offset ; } |
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340 |
address consts_end () const { return header_begin() + code_offset() ; } |
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341 |
address insts_begin () const { return header_begin() + code_offset() ; } |
6418 | 342 |
address insts_end () const { return header_begin() + _stub_offset ; } |
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343 |
address stub_begin () const { return header_begin() + _stub_offset ; } |
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344 |
address stub_end () const { return header_begin() + _oops_offset ; } |
4752 | 345 |
address exception_begin () const { return header_begin() + _exception_offset ; } |
346 |
address deopt_handler_begin () const { return header_begin() + _deoptimize_offset ; } |
|
347 |
address deopt_mh_handler_begin() const { return header_begin() + _deoptimize_mh_offset ; } |
|
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348 |
address unwind_handler_begin () const { return _unwind_handler_offset != -1 ? (header_begin() + _unwind_handler_offset) : NULL; } |
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349 |
oop* oops_begin () const { return (oop*) (header_begin() + _oops_offset) ; } |
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350 |
oop* oops_end () const { return (oop*) (header_begin() + _scopes_data_offset) ; } |
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351 |
|
4752 | 352 |
address scopes_data_begin () const { return header_begin() + _scopes_data_offset ; } |
353 |
address scopes_data_end () const { return header_begin() + _scopes_pcs_offset ; } |
|
354 |
PcDesc* scopes_pcs_begin () const { return (PcDesc*)(header_begin() + _scopes_pcs_offset ); } |
|
355 |
PcDesc* scopes_pcs_end () const { return (PcDesc*)(header_begin() + _dependencies_offset) ; } |
|
356 |
address dependencies_begin () const { return header_begin() + _dependencies_offset ; } |
|
357 |
address dependencies_end () const { return header_begin() + _handler_table_offset ; } |
|
358 |
address handler_table_begin () const { return header_begin() + _handler_table_offset ; } |
|
359 |
address handler_table_end () const { return header_begin() + _nul_chk_table_offset ; } |
|
360 |
address nul_chk_table_begin () const { return header_begin() + _nul_chk_table_offset ; } |
|
361 |
address nul_chk_table_end () const { return header_begin() + _nmethod_end_offset ; } |
|
1 | 362 |
|
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|
363 |
// Sizes |
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364 |
int consts_size () const { return consts_end () - consts_begin (); } |
6418 | 365 |
int insts_size () const { return insts_end () - insts_begin (); } |
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366 |
int stub_size () const { return stub_end () - stub_begin (); } |
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367 |
int oops_size () const { return (address) oops_end () - (address) oops_begin (); } |
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368 |
int scopes_data_size () const { return scopes_data_end () - scopes_data_begin (); } |
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369 |
int scopes_pcs_size () const { return (intptr_t) scopes_pcs_end () - (intptr_t) scopes_pcs_begin (); } |
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370 |
int dependencies_size () const { return dependencies_end () - dependencies_begin (); } |
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|
371 |
int handler_table_size() const { return handler_table_end() - handler_table_begin(); } |
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|
372 |
int nul_chk_table_size() const { return nul_chk_table_end() - nul_chk_table_begin(); } |
1 | 373 |
|
374 |
int total_size () const; |
|
375 |
||
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|
376 |
// Containment |
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|
377 |
bool consts_contains (address addr) const { return consts_begin () <= addr && addr < consts_end (); } |
6418 | 378 |
bool insts_contains (address addr) const { return insts_begin () <= addr && addr < insts_end (); } |
1 | 379 |
bool stub_contains (address addr) const { return stub_begin () <= addr && addr < stub_end (); } |
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|
380 |
bool oops_contains (oop* addr) const { return oops_begin () <= addr && addr < oops_end (); } |
1 | 381 |
bool scopes_data_contains (address addr) const { return scopes_data_begin () <= addr && addr < scopes_data_end (); } |
382 |
bool scopes_pcs_contains (PcDesc* addr) const { return scopes_pcs_begin () <= addr && addr < scopes_pcs_end (); } |
|
383 |
bool handler_table_contains(address addr) const { return handler_table_begin() <= addr && addr < handler_table_end(); } |
|
384 |
bool nul_chk_table_contains(address addr) const { return nul_chk_table_begin() <= addr && addr < nul_chk_table_end(); } |
|
385 |
||
386 |
// entry points |
|
387 |
address entry_point() const { return _entry_point; } // normal entry point |
|
388 |
address verified_entry_point() const { return _verified_entry_point; } // if klass is correct |
|
389 |
||
390 |
// flag accessing and manipulation |
|
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|
391 |
bool is_in_use() const { return _state == alive; } |
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|
392 |
bool is_alive() const { return _state == alive || _state == not_entrant; } |
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|
393 |
bool is_not_entrant() const { return _state == not_entrant; } |
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|
394 |
bool is_zombie() const { return _state == zombie; } |
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|
395 |
bool is_unloaded() const { return _state == unloaded; } |
1 | 396 |
|
4479
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|
397 |
// Make the nmethod non entrant. The nmethod will continue to be |
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|
398 |
// alive. It is used when an uncommon trap happens. Returns true |
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|
399 |
// if this thread changed the state of the nmethod or false if |
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|
400 |
// another thread performed the transition. |
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|
401 |
bool make_not_entrant() { return make_not_entrant_or_zombie(not_entrant); } |
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|
402 |
bool make_zombie() { return make_not_entrant_or_zombie(zombie); } |
1 | 403 |
|
404 |
// used by jvmti to track if the unload event has been reported |
|
405 |
bool unload_reported() { return _unload_reported; } |
|
406 |
void set_unload_reported() { _unload_reported = true; } |
|
407 |
||
5924
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|
408 |
bool is_marked_for_deoptimization() const { return _marked_for_deoptimization; } |
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|
409 |
void mark_for_deoptimization() { _marked_for_deoptimization = true; } |
1 | 410 |
|
411 |
void make_unloaded(BoolObjectClosure* is_alive, oop cause); |
|
412 |
||
413 |
bool has_dependencies() { return dependencies_size() != 0; } |
|
414 |
void flush_dependencies(BoolObjectClosure* is_alive); |
|
5924
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|
415 |
bool has_flushed_dependencies() { return _has_flushed_dependencies; } |
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|
416 |
void set_has_flushed_dependencies() { |
1 | 417 |
assert(!has_flushed_dependencies(), "should only happen once"); |
5924
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|
418 |
_has_flushed_dependencies = 1; |
1 | 419 |
} |
420 |
||
5924
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|
421 |
bool is_marked_for_reclamation() const { return _marked_for_reclamation; } |
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|
422 |
void mark_for_reclamation() { _marked_for_reclamation = 1; } |
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|
423 |
|
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|
424 |
bool has_unsafe_access() const { return _has_unsafe_access; } |
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|
425 |
void set_has_unsafe_access(bool z) { _has_unsafe_access = z; } |
1 | 426 |
|
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|
427 |
bool has_method_handle_invokes() const { return _has_method_handle_invokes; } |
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|
428 |
void set_has_method_handle_invokes(bool z) { _has_method_handle_invokes = z; } |
1 | 429 |
|
5924
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|
430 |
bool is_speculatively_disconnected() const { return _speculatively_disconnected; } |
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|
431 |
void set_speculatively_disconnected(bool z) { _speculatively_disconnected = z; } |
4750 | 432 |
|
1 | 433 |
int comp_level() const { return _comp_level; } |
434 |
||
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|
435 |
// Support for oops in scopes and relocs: |
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|
436 |
// Note: index 0 is reserved for null. |
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|
437 |
oop oop_at(int index) const { return index == 0 ? (oop) NULL: *oop_addr_at(index); } |
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|
438 |
oop* oop_addr_at(int index) const { // for GC |
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|
439 |
// relocation indexes are biased by 1 (because 0 is reserved) |
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|
440 |
assert(index > 0 && index <= oops_size(), "must be a valid non-zero index"); |
6268 | 441 |
assert(!_oops_are_stale, "oops are stale"); |
5686
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|
442 |
return &oops_begin()[index - 1]; |
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|
443 |
} |
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|
444 |
|
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|
445 |
void copy_oops(GrowableArray<jobject>* oops); |
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|
446 |
|
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|
447 |
// Relocation support |
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|
448 |
private: |
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|
449 |
void fix_oop_relocations(address begin, address end, bool initialize_immediates); |
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|
450 |
inline void initialize_immediate_oop(oop* dest, jobject handle); |
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|
451 |
|
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|
452 |
public: |
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|
453 |
void fix_oop_relocations(address begin, address end) { fix_oop_relocations(begin, end, false); } |
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|
454 |
void fix_oop_relocations() { fix_oop_relocations(NULL, NULL, false); } |
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twisti
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diff
changeset
|
455 |
|
5435e77aa3df
6951083: oops and relocations should part of nmethod not CodeBlob
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5533
diff
changeset
|
456 |
bool is_at_poll_return(address pc); |
5435e77aa3df
6951083: oops and relocations should part of nmethod not CodeBlob
twisti
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5533
diff
changeset
|
457 |
bool is_at_poll_or_poll_return(address pc); |
5435e77aa3df
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twisti
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diff
changeset
|
458 |
|
3908
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6863023: need non-perm oops in code cache for JSR 292
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parents:
2131
diff
changeset
|
459 |
// Non-perm oop support |
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
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2131
diff
changeset
|
460 |
bool on_scavenge_root_list() const { return (_scavenge_root_state & 1) != 0; } |
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
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|
461 |
protected: |
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
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2131
diff
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|
462 |
enum { npl_on_list = 0x01, npl_marked = 0x10 }; |
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
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2131
diff
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|
463 |
void set_on_scavenge_root_list() { _scavenge_root_state = npl_on_list; } |
24b55ad4c228
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diff
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|
464 |
void clear_on_scavenge_root_list() { _scavenge_root_state = 0; } |
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
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2131
diff
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|
465 |
// assertion-checking and pruning logic uses the bits of _scavenge_root_state |
24b55ad4c228
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jrose
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2131
diff
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|
466 |
#ifndef PRODUCT |
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
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2131
diff
changeset
|
467 |
void set_scavenge_root_marked() { _scavenge_root_state |= npl_marked; } |
24b55ad4c228
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|
468 |
void clear_scavenge_root_marked() { _scavenge_root_state &= ~npl_marked; } |
24b55ad4c228
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|
469 |
bool scavenge_root_not_marked() { return (_scavenge_root_state &~ npl_on_list) == 0; } |
24b55ad4c228
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diff
changeset
|
470 |
// N.B. there is no positive marked query, and we only use the not_marked query for asserts. |
24b55ad4c228
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|
471 |
#endif //PRODUCT |
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|
472 |
nmethod* scavenge_root_link() const { return _scavenge_root_link; } |
24b55ad4c228
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|
473 |
void set_scavenge_root_link(nmethod *n) { _scavenge_root_link = n; } |
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|
474 |
|
4750 | 475 |
nmethod* saved_nmethod_link() const { return _saved_nmethod_link; } |
476 |
void set_saved_nmethod_link(nmethod *n) { _saved_nmethod_link = n; } |
|
477 |
||
3908
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|
478 |
public: |
24b55ad4c228
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changeset
|
479 |
|
1 | 480 |
// Sweeper support |
481 |
long stack_traversal_mark() { return _stack_traversal_mark; } |
|
482 |
void set_stack_traversal_mark(long l) { _stack_traversal_mark = l; } |
|
483 |
||
484 |
// Exception cache support |
|
485 |
ExceptionCache* exception_cache() const { return _exception_cache; } |
|
486 |
void set_exception_cache(ExceptionCache *ec) { _exception_cache = ec; } |
|
487 |
address handler_for_exception_and_pc(Handle exception, address pc); |
|
488 |
void add_handler_for_exception_and_pc(Handle exception, address pc, address handler); |
|
489 |
void remove_from_exception_cache(ExceptionCache* ec); |
|
490 |
||
491 |
// implicit exceptions support |
|
492 |
address continuation_for_implicit_exception(address pc); |
|
493 |
||
494 |
// On-stack replacement support |
|
495 |
int osr_entry_bci() const { assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); return _entry_bci; } |
|
496 |
address osr_entry() const { assert(_entry_bci != InvocationEntryBci, "wrong kind of nmethod"); return _osr_entry_point; } |
|
497 |
void invalidate_osr_method(); |
|
3908
24b55ad4c228
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changeset
|
498 |
nmethod* osr_link() const { return _osr_link; } |
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changeset
|
499 |
void set_osr_link(nmethod *n) { _osr_link = n; } |
1 | 500 |
|
501 |
// tells whether frames described by this nmethod can be deoptimized |
|
502 |
// note: native wrappers cannot be deoptimized. |
|
503 |
bool can_be_deoptimized() const { return is_java_method(); } |
|
504 |
||
505 |
// Inline cache support |
|
506 |
void clear_inline_caches(); |
|
507 |
void cleanup_inline_caches(); |
|
508 |
bool inlinecache_check_contains(address addr) const { |
|
6418 | 509 |
return (addr >= code_begin() && addr < verified_entry_point()); |
1 | 510 |
} |
511 |
||
512 |
// unlink and deallocate this nmethod |
|
513 |
// Only NMethodSweeper class is expected to use this. NMethodSweeper is not |
|
514 |
// expected to use any other private methods/data in this class. |
|
515 |
||
516 |
protected: |
|
517 |
void flush(); |
|
518 |
||
519 |
public: |
|
520 |
// If returning true, it is unsafe to remove this nmethod even though it is a zombie |
|
521 |
// nmethod, since the VM might have a reference to it. Should only be called from a safepoint. |
|
522 |
bool is_locked_by_vm() const { return _lock_count >0; } |
|
523 |
||
524 |
// See comment at definition of _last_seen_on_stack |
|
525 |
void mark_as_seen_on_stack(); |
|
526 |
bool can_not_entrant_be_converted(); |
|
527 |
||
528 |
// Evolution support. We make old (discarded) compiled methods point to new methodOops. |
|
529 |
void set_method(methodOop method) { _method = method; } |
|
530 |
||
531 |
// GC support |
|
532 |
void do_unloading(BoolObjectClosure* is_alive, OopClosure* keep_alive, |
|
533 |
bool unloading_occurred); |
|
534 |
bool can_unload(BoolObjectClosure* is_alive, OopClosure* keep_alive, |
|
535 |
oop* root, bool unloading_occurred); |
|
536 |
||
537 |
void preserve_callee_argument_oops(frame fr, const RegisterMap *reg_map, |
|
538 |
OopClosure* f); |
|
5686
5435e77aa3df
6951083: oops and relocations should part of nmethod not CodeBlob
twisti
parents:
5533
diff
changeset
|
539 |
void oops_do(OopClosure* f) { oops_do(f, false); } |
5435e77aa3df
6951083: oops and relocations should part of nmethod not CodeBlob
twisti
parents:
5533
diff
changeset
|
540 |
void oops_do(OopClosure* f, bool do_strong_roots_only); |
3908
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
2131
diff
changeset
|
541 |
bool detect_scavenge_root_oops(); |
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
2131
diff
changeset
|
542 |
void verify_scavenge_root_oops() PRODUCT_RETURN; |
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
2131
diff
changeset
|
543 |
|
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
2131
diff
changeset
|
544 |
bool test_set_oops_do_mark(); |
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
2131
diff
changeset
|
545 |
static void oops_do_marking_prologue(); |
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
2131
diff
changeset
|
546 |
static void oops_do_marking_epilogue(); |
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
parents:
2131
diff
changeset
|
547 |
static bool oops_do_marking_is_active() { return _oops_do_mark_nmethods != NULL; } |
24b55ad4c228
6863023: need non-perm oops in code cache for JSR 292
jrose
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diff
changeset
|
548 |
DEBUG_ONLY(bool test_oops_do_mark() { return _oops_do_mark_link != NULL; }) |
1 | 549 |
|
550 |
// ScopeDesc for an instruction |
|
551 |
ScopeDesc* scope_desc_at(address pc); |
|
552 |
||
553 |
private: |
|
554 |
ScopeDesc* scope_desc_in(address begin, address end); |
|
555 |
||
4752 | 556 |
address* orig_pc_addr(const frame* fr) { return (address*) ((address)fr->unextended_sp() + _orig_pc_offset); } |
1 | 557 |
|
558 |
PcDesc* find_pc_desc_internal(address pc, bool approximate); |
|
559 |
||
560 |
PcDesc* find_pc_desc(address pc, bool approximate) { |
|
561 |
PcDesc* desc = _pc_desc_cache.last_pc_desc(); |
|
6418 | 562 |
if (desc != NULL && desc->pc_offset() == pc - code_begin()) { |
1 | 563 |
return desc; |
564 |
} |
|
565 |
return find_pc_desc_internal(pc, approximate); |
|
566 |
} |
|
567 |
||
568 |
public: |
|
569 |
// ScopeDesc retrieval operation |
|
570 |
PcDesc* pc_desc_at(address pc) { return find_pc_desc(pc, false); } |
|
571 |
// pc_desc_near returns the first PcDesc at or after the givne pc. |
|
572 |
PcDesc* pc_desc_near(address pc) { return find_pc_desc(pc, true); } |
|
573 |
||
574 |
public: |
|
575 |
// copying of debugging information |
|
576 |
void copy_scopes_pcs(PcDesc* pcs, int count); |
|
577 |
void copy_scopes_data(address buffer, int size); |
|
578 |
||
4752 | 579 |
// Deopt |
580 |
// Return true is the PC is one would expect if the frame is being deopted. |
|
581 |
bool is_deopt_pc (address pc) { return is_deopt_entry(pc) || is_deopt_mh_entry(pc); } |
|
582 |
bool is_deopt_entry (address pc) { return pc == deopt_handler_begin(); } |
|
583 |
bool is_deopt_mh_entry(address pc) { return pc == deopt_mh_handler_begin(); } |
|
1 | 584 |
// Accessor/mutator for the original pc of a frame before a frame was deopted. |
585 |
address get_original_pc(const frame* fr) { return *orig_pc_addr(fr); } |
|
586 |
void set_original_pc(const frame* fr, address pc) { *orig_pc_addr(fr) = pc; } |
|
587 |
||
4752 | 588 |
static address get_deopt_original_pc(const frame* fr); |
589 |
||
4564
55dfb20908d0
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
twisti
parents:
4479
diff
changeset
|
590 |
// MethodHandle |
55dfb20908d0
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
twisti
parents:
4479
diff
changeset
|
591 |
bool is_method_handle_return(address return_pc); |
55dfb20908d0
6893081: method handle & invokedynamic code needs additional cleanup (post 6815692, 6858164)
twisti
parents:
4479
diff
changeset
|
592 |
|
1 | 593 |
// jvmti support: |
594 |
void post_compiled_method_load_event(); |
|
5896
c60924a89622
6656830: assert((*p)->is_oop(),"expected an oop while scanning weak refs")
never
parents:
5702
diff
changeset
|
595 |
jmethodID get_and_cache_jmethod_id(); |
1 | 596 |
|
597 |
// verify operations |
|
598 |
void verify(); |
|
599 |
void verify_scopes(); |
|
600 |
void verify_interrupt_point(address interrupt_point); |
|
601 |
||
6453 | 602 |
// print compilation helper |
603 |
static void print_compilation(outputStream *st, const char *method_name, const char *title, |
|
604 |
methodOop method, bool is_blocking, int compile_id, int bci, int comp_level); |
|
605 |
||
1 | 606 |
// printing support |
347
df859fcca515
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
1
diff
changeset
|
607 |
void print() const; |
df859fcca515
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
1
diff
changeset
|
608 |
void print_code(); |
1 | 609 |
void print_relocations() PRODUCT_RETURN; |
610 |
void print_pcs() PRODUCT_RETURN; |
|
611 |
void print_scopes() PRODUCT_RETURN; |
|
612 |
void print_dependencies() PRODUCT_RETURN; |
|
613 |
void print_value_on(outputStream* st) const PRODUCT_RETURN; |
|
614 |
void print_calls(outputStream* st) PRODUCT_RETURN; |
|
615 |
void print_handler_table() PRODUCT_RETURN; |
|
616 |
void print_nul_chk_table() PRODUCT_RETURN; |
|
347
df859fcca515
6667042: PrintAssembly option does not work without special plugin
jrose
parents:
1
diff
changeset
|
617 |
void print_nmethod(bool print_code); |
1 | 618 |
|
6176
4d9030fe341f
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
5924
diff
changeset
|
619 |
// need to re-define this from CodeBlob else the overload hides it |
4d9030fe341f
6953477: Increase portability and flexibility of building Hotspot
bobv
parents:
5924
diff
changeset
|
620 |
virtual void print_on(outputStream* st) const { CodeBlob::print_on(st); } |
1 | 621 |
void print_on(outputStream* st, const char* title) const; |
622 |
||
623 |
// Logging |
|
624 |
void log_identity(xmlStream* log) const; |
|
625 |
void log_new_nmethod() const; |
|
4479
5686407cde7a
5057818: codecache full and compiler disabled in bigapps fastdebug run
never
parents:
3919
diff
changeset
|
626 |
void log_state_change() const; |
1 | 627 |
|
4584
e2a449e8cc6f
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
4570
diff
changeset
|
628 |
// Prints block-level comments, including nmethod specific block labels: |
e2a449e8cc6f
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
4570
diff
changeset
|
629 |
virtual void print_block_comment(outputStream* stream, address block_begin) { |
e2a449e8cc6f
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
4570
diff
changeset
|
630 |
print_nmethod_labels(stream, block_begin); |
e2a449e8cc6f
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
4570
diff
changeset
|
631 |
CodeBlob::print_block_comment(stream, block_begin); |
e2a449e8cc6f
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
4570
diff
changeset
|
632 |
} |
e2a449e8cc6f
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
4570
diff
changeset
|
633 |
void print_nmethod_labels(outputStream* stream, address block_begin); |
e2a449e8cc6f
6912062: disassembler plugin needs to produce symbolic information in product mode
jrose
parents:
4570
diff
changeset
|
634 |
|
1 | 635 |
// Prints a comment for one native instruction (reloc info, pc desc) |
347
df859fcca515
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parents:
1
diff
changeset
|
636 |
void print_code_comment_on(outputStream* st, int column, address begin, address end); |
1 | 637 |
static void print_statistics() PRODUCT_RETURN; |
638 |
||
639 |
// Compiler task identification. Note that all OSR methods |
|
640 |
// are numbered in an independent sequence if CICountOSR is true, |
|
641 |
// and native method wrappers are also numbered independently if |
|
642 |
// CICountNative is true. |
|
643 |
int compile_id() const { return _compile_id; } |
|
644 |
const char* compile_kind() const; |
|
645 |
||
646 |
// For debugging |
|
647 |
// CompiledIC* IC_at(char* p) const; |
|
648 |
// PrimitiveIC* primitiveIC_at(char* p) const; |
|
649 |
oop embeddedOop_at(address p); |
|
650 |
||
651 |
// tells if any of this method's dependencies have been invalidated |
|
652 |
// (this is expensive!) |
|
653 |
bool check_all_dependencies(); |
|
654 |
||
655 |
// tells if this compiled method is dependent on the given changes, |
|
656 |
// and the changes have invalidated it |
|
657 |
bool check_dependency_on(DepChange& changes); |
|
658 |
||
659 |
// Evolution support. Tells if this compiled method is dependent on any of |
|
660 |
// methods m() of class dependee, such that if m() in dependee is replaced, |
|
661 |
// this compiled method will have to be deoptimized. |
|
662 |
bool is_evol_dependent_on(klassOop dependee); |
|
663 |
||
664 |
// Fast breakpoint support. Tells if this compiled method is |
|
665 |
// dependent on the given method. Returns true if this nmethod |
|
666 |
// corresponds to the given method as well. |
|
667 |
bool is_dependent_on_method(methodOop dependee); |
|
668 |
||
669 |
// is it ok to patch at address? |
|
670 |
bool is_patchable_at(address instr_address); |
|
671 |
||
672 |
// UseBiasedLocking support |
|
673 |
ByteSize compiled_synchronized_native_basic_lock_owner_sp_offset() { |
|
674 |
return _compiled_synchronized_native_basic_lock_owner_sp_offset; |
|
675 |
} |
|
676 |
ByteSize compiled_synchronized_native_basic_lock_sp_offset() { |
|
677 |
return _compiled_synchronized_native_basic_lock_sp_offset; |
|
678 |
} |
|
679 |
||
680 |
// support for code generation |
|
681 |
static int verified_entry_point_offset() { return offset_of(nmethod, _verified_entry_point); } |
|
682 |
static int osr_entry_point_offset() { return offset_of(nmethod, _osr_entry_point); } |
|
683 |
static int entry_bci_offset() { return offset_of(nmethod, _entry_bci); } |
|
684 |
||
685 |
}; |
|
686 |
||
687 |
// Locks an nmethod so its code will not get removed, even if it is a zombie/not_entrant method |
|
688 |
class nmethodLocker : public StackObj { |
|
689 |
nmethod* _nm; |
|
690 |
||
691 |
static void lock_nmethod(nmethod* nm); // note: nm can be NULL |
|
692 |
static void unlock_nmethod(nmethod* nm); // (ditto) |
|
693 |
||
694 |
public: |
|
695 |
nmethodLocker(address pc); // derive nm from pc |
|
696 |
nmethodLocker(nmethod *nm) { _nm = nm; lock_nmethod(_nm); } |
|
697 |
nmethodLocker() { _nm = NULL; } |
|
698 |
~nmethodLocker() { unlock_nmethod(_nm); } |
|
699 |
||
700 |
nmethod* code() { return _nm; } |
|
701 |
void set_code(nmethod* new_nm) { |
|
702 |
unlock_nmethod(_nm); // note: This works even if _nm==new_nm. |
|
703 |
_nm = new_nm; |
|
704 |
lock_nmethod(_nm); |
|
705 |
} |
|
706 |
}; |