Thu, 25 Sep 2008 12:50:51 -0700
6744783: HotSpot segfaults if given -XX options with an empty string argument
Reviewed-by: kamg, kvn
Contributed-by: volker.simonis@gmail.com
1 /*
2 * Copyright 1997-2008 Sun Microsystems, Inc. All Rights Reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
20 * CA 95054 USA or visit www.sun.com if you need additional information or
21 * have any questions.
22 *
23 */
25 class AdapterHandlerEntry;
26 class vframeStream;
28 // Runtime is the base class for various runtime interfaces
29 // (InterpreterRuntime, CompilerRuntime, etc.). It provides
30 // shared functionality such as exception forwarding (C++ to
31 // Java exceptions), locking/unlocking mechanisms, statistical
32 // information, etc.
34 class SharedRuntime: AllStatic {
35 private:
36 static methodHandle resolve_sub_helper(JavaThread *thread,
37 bool is_virtual,
38 bool is_optimized, TRAPS);
40 // Shared stub locations
42 static RuntimeStub* _wrong_method_blob;
43 static RuntimeStub* _ic_miss_blob;
44 static RuntimeStub* _resolve_opt_virtual_call_blob;
45 static RuntimeStub* _resolve_virtual_call_blob;
46 static RuntimeStub* _resolve_static_call_blob;
48 static SafepointBlob* _polling_page_safepoint_handler_blob;
49 static SafepointBlob* _polling_page_return_handler_blob;
50 #ifdef COMPILER2
51 static ExceptionBlob* _exception_blob;
52 static UncommonTrapBlob* _uncommon_trap_blob;
53 #endif // COMPILER2
55 #ifndef PRODUCT
57 // Counters
58 static int _nof_megamorphic_calls; // total # of megamorphic calls (through vtable)
60 #endif // !PRODUCT
61 public:
63 // max bytes for each dtrace string parameter
64 enum { max_dtrace_string_size = 256 };
66 // The following arithmetic routines are used on platforms that do
67 // not have machine instructions to implement their functionality.
68 // Do not remove these.
70 // long arithmetics
71 static jlong lmul(jlong y, jlong x);
72 static jlong ldiv(jlong y, jlong x);
73 static jlong lrem(jlong y, jlong x);
75 // float and double remainder
76 static jfloat frem(jfloat x, jfloat y);
77 static jdouble drem(jdouble x, jdouble y);
79 // float conversion (needs to set appropriate rounding mode)
80 static jint f2i (jfloat x);
81 static jlong f2l (jfloat x);
82 static jint d2i (jdouble x);
83 static jlong d2l (jdouble x);
84 static jfloat d2f (jdouble x);
85 static jfloat l2f (jlong x);
86 static jdouble l2d (jlong x);
88 // double trigonometrics and transcendentals
89 static jdouble dsin(jdouble x);
90 static jdouble dcos(jdouble x);
91 static jdouble dtan(jdouble x);
92 static jdouble dlog(jdouble x);
93 static jdouble dlog10(jdouble x);
94 static jdouble dexp(jdouble x);
95 static jdouble dpow(jdouble x, jdouble y);
98 // exception handling across interpreter/compiler boundaries
99 static address raw_exception_handler_for_return_address(address return_address);
100 static address exception_handler_for_return_address(address return_address);
102 // exception handling and implicit exceptions
103 static address compute_compiled_exc_handler(nmethod* nm, address ret_pc, Handle& exception,
104 bool force_unwind, bool top_frame_only);
105 enum ImplicitExceptionKind {
106 IMPLICIT_NULL,
107 IMPLICIT_DIVIDE_BY_ZERO,
108 STACK_OVERFLOW
109 };
110 static void throw_AbstractMethodError(JavaThread* thread);
111 static void throw_IncompatibleClassChangeError(JavaThread* thread);
112 static void throw_ArithmeticException(JavaThread* thread);
113 static void throw_NullPointerException(JavaThread* thread);
114 static void throw_NullPointerException_at_call(JavaThread* thread);
115 static void throw_StackOverflowError(JavaThread* thread);
116 static address continuation_for_implicit_exception(JavaThread* thread,
117 address faulting_pc,
118 ImplicitExceptionKind exception_kind);
120 // Shared stub locations
121 static address get_poll_stub(address pc);
123 static address get_ic_miss_stub() {
124 assert(_ic_miss_blob!= NULL, "oops");
125 return _ic_miss_blob->instructions_begin();
126 }
128 static address get_handle_wrong_method_stub() {
129 assert(_wrong_method_blob!= NULL, "oops");
130 return _wrong_method_blob->instructions_begin();
131 }
133 #ifdef COMPILER2
134 static void generate_uncommon_trap_blob(void);
135 static UncommonTrapBlob* uncommon_trap_blob() { return _uncommon_trap_blob; }
136 #endif // COMPILER2
138 static address get_resolve_opt_virtual_call_stub(){
139 assert(_resolve_opt_virtual_call_blob != NULL, "oops");
140 return _resolve_opt_virtual_call_blob->instructions_begin();
141 }
142 static address get_resolve_virtual_call_stub() {
143 assert(_resolve_virtual_call_blob != NULL, "oops");
144 return _resolve_virtual_call_blob->instructions_begin();
145 }
146 static address get_resolve_static_call_stub() {
147 assert(_resolve_static_call_blob != NULL, "oops");
148 return _resolve_static_call_blob->instructions_begin();
149 }
151 static SafepointBlob* polling_page_return_handler_blob() { return _polling_page_return_handler_blob; }
152 static SafepointBlob* polling_page_safepoint_handler_blob() { return _polling_page_safepoint_handler_blob; }
154 // Counters
155 #ifndef PRODUCT
156 static address nof_megamorphic_calls_addr() { return (address)&_nof_megamorphic_calls; }
157 #endif // PRODUCT
159 // Helper routine for full-speed JVMTI exception throwing support
160 static void throw_and_post_jvmti_exception(JavaThread *thread, Handle h_exception);
161 static void throw_and_post_jvmti_exception(JavaThread *thread, symbolOop name, const char *message = NULL);
163 // To be used as the entry point for unresolved native methods.
164 static address native_method_throw_unsatisfied_link_error_entry();
166 // bytecode tracing is only used by the TraceBytecodes
167 static intptr_t trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2) PRODUCT_RETURN0;
169 // Used to back off a spin lock that is under heavy contention
170 static void yield_all(JavaThread* thread, int attempts = 0);
172 static oop retrieve_receiver( symbolHandle sig, frame caller );
174 static void verify_caller_frame(frame caller_frame, methodHandle callee_method) PRODUCT_RETURN;
175 static methodHandle find_callee_method_inside_interpreter(frame caller_frame, methodHandle caller_method, int bci) PRODUCT_RETURN_(return methodHandle(););
177 static void register_finalizer(JavaThread* thread, oopDesc* obj);
179 // dtrace notifications
180 static int dtrace_object_alloc(oopDesc* o);
181 static int dtrace_object_alloc_base(Thread* thread, oopDesc* o);
182 static int dtrace_method_entry(JavaThread* thread, methodOopDesc* m);
183 static int dtrace_method_exit(JavaThread* thread, methodOopDesc* m);
185 // Utility method for retrieving the Java thread id, returns 0 if the
186 // thread is not a well formed Java thread.
187 static jlong get_java_tid(Thread* thread);
190 // used by native wrappers to reenable yellow if overflow happened in native code
191 static void reguard_yellow_pages();
193 /**
194 * Fill in the "X cannot be cast to a Y" message for ClassCastException
195 *
196 * @param thr the current thread
197 * @param name the name of the class of the object attempted to be cast
198 * @return the dynamically allocated exception message (must be freed
199 * by the caller using a resource mark)
200 *
201 * BCP must refer to the current 'checkcast' opcode for the frame
202 * on top of the stack.
203 * The caller (or one of it's callers) must use a ResourceMark
204 * in order to correctly free the result.
205 */
206 static char* generate_class_cast_message(JavaThread* thr, const char* name);
208 /**
209 * Fill in the "X cannot be cast to a Y" message for ClassCastException
210 *
211 * @param name the name of the class of the object attempted to be cast
212 * @param klass the name of the target klass attempt
213 * @return the dynamically allocated exception message (must be freed
214 * by the caller using a resource mark)
215 *
216 * This version does not require access the frame, so it can be called
217 * from interpreted code
218 * The caller (or one of it's callers) must use a ResourceMark
219 * in order to correctly free the result.
220 */
221 static char* generate_class_cast_message(const char* name, const char* klass);
223 // Resolves a call site- may patch in the destination of the call into the
224 // compiled code.
225 static methodHandle resolve_helper(JavaThread *thread,
226 bool is_virtual,
227 bool is_optimized, TRAPS);
229 static void generate_stubs(void);
231 private:
232 // deopt blob
233 static void generate_deopt_blob(void);
234 static DeoptimizationBlob* _deopt_blob;
236 public:
237 static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; }
239 // Resets a call-site in compiled code so it will get resolved again.
240 static methodHandle reresolve_call_site(JavaThread *thread, TRAPS);
242 // In the code prolog, if the klass comparison fails, the inline cache
243 // misses and the call site is patched to megamorphic
244 static methodHandle handle_ic_miss_helper(JavaThread* thread, TRAPS);
246 // Find the method that called us.
247 static methodHandle find_callee_method(JavaThread* thread, TRAPS);
250 private:
251 static Handle find_callee_info(JavaThread* thread,
252 Bytecodes::Code& bc,
253 CallInfo& callinfo, TRAPS);
254 static Handle find_callee_info_helper(JavaThread* thread,
255 vframeStream& vfst,
256 Bytecodes::Code& bc,
257 CallInfo& callinfo, TRAPS);
259 static address clean_virtual_call_entry();
260 static address clean_opt_virtual_call_entry();
261 static address clean_static_call_entry();
263 public:
265 // Read the array of BasicTypes from a Java signature, and compute where
266 // compiled Java code would like to put the results. Values in reg_lo and
267 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are
268 // registers, those above refer to 4-byte stack slots. All stack slots are
269 // based off of the window top. SharedInfo::stack0 refers to the first usable
270 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word
271 // 4-bytes higher. So for sparc because the register window save area is at
272 // the bottom of the frame the first 16 words will be skipped and SharedInfo::stack0
273 // will be just above it. (
274 // return value is the maximum number of VMReg stack slots the convention will use.
275 static int java_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed, int is_outgoing);
277 // Ditto except for calling C
278 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed);
280 // Generate I2C and C2I adapters. These adapters are simple argument marshalling
281 // blobs. Unlike adapters in the tiger and earlier releases the code in these
282 // blobs does not create a new frame and are therefore virtually invisible
283 // to the stack walking code. In general these blobs extend the callers stack
284 // as needed for the conversion of argument locations.
286 // When calling a c2i blob the code will always call the interpreter even if
287 // by the time we reach the blob there is compiled code available. This allows
288 // the blob to pass the incoming stack pointer (the sender sp) in a known
289 // location for the interpreter to record. This is used by the frame code
290 // to correct the sender code to match up with the stack pointer when the
291 // thread left the compiled code. In addition it allows the interpreter
292 // to remove the space the c2i adapter allocated to do it argument conversion.
294 // Although a c2i blob will always run interpreted even if compiled code is
295 // present if we see that compiled code is present the compiled call site
296 // will be patched/re-resolved so that later calls will run compiled.
298 // Aditionally a c2i blob need to have a unverified entry because it can be reached
299 // in situations where the call site is an inlined cache site and may go megamorphic.
301 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed
302 // that the interpreter before it does any call dispatch will record the current
303 // stack pointer in the interpreter frame. On return it will restore the stack
304 // pointer as needed. This means the i2c adapter code doesn't need any special
305 // handshaking path with compiled code to keep the stack walking correct.
307 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *_masm,
308 int total_args_passed,
309 int max_arg,
310 const BasicType *sig_bt,
311 const VMRegPair *regs);
313 // OSR support
315 // OSR_migration_begin will extract the jvm state from an interpreter
316 // frame (locals, monitors) and store the data in a piece of C heap
317 // storage. This then allows the interpreter frame to be removed from the
318 // stack and the OSR nmethod to be called. That method is called with a
319 // pointer to the C heap storage. This pointer is the return value from
320 // OSR_migration_begin.
322 static intptr_t* OSR_migration_begin( JavaThread *thread);
324 // OSR_migration_end is a trivial routine. It is called after the compiled
325 // method has extracted the jvm state from the C heap that OSR_migration_begin
326 // created. It's entire job is to simply free this storage.
327 static void OSR_migration_end ( intptr_t* buf);
329 // Convert a sig into a calling convention register layout
330 // and find interesting things about it.
331 static VMRegPair* find_callee_arguments(symbolOop sig, bool is_static, int *arg_size);
332 static VMReg name_for_receiver();
334 // "Top of Stack" slots that may be unused by the calling convention but must
335 // otherwise be preserved.
336 // On Intel these are not necessary and the value can be zero.
337 // On Sparc this describes the words reserved for storing a register window
338 // when an interrupt occurs.
339 static uint out_preserve_stack_slots();
341 // Save and restore a native result
342 static void save_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots );
343 static void restore_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots );
345 // Generate a native wrapper for a given method. The method takes arguments
346 // in the Java compiled code convention, marshals them to the native
347 // convention (handlizes oops, etc), transitions to native, makes the call,
348 // returns to java state (possibly blocking), unhandlizes any result and
349 // returns.
350 static nmethod *generate_native_wrapper(MacroAssembler* masm,
351 methodHandle method,
352 int total_args_passed,
353 int max_arg,
354 BasicType *sig_bt,
355 VMRegPair *regs,
356 BasicType ret_type );
358 #ifdef HAVE_DTRACE_H
359 // Generate a dtrace wrapper for a given method. The method takes arguments
360 // in the Java compiled code convention, marshals them to the native
361 // convention (handlizes oops, etc), transitions to native, makes the call,
362 // returns to java state (possibly blocking), unhandlizes any result and
363 // returns.
364 static nmethod *generate_dtrace_nmethod(MacroAssembler* masm,
365 methodHandle method);
367 // dtrace support to convert a Java string to utf8
368 static void get_utf(oopDesc* src, address dst);
369 #endif // def HAVE_DTRACE_H
371 // A compiled caller has just called the interpreter, but compiled code
372 // exists. Patch the caller so he no longer calls into the interpreter.
373 static void fixup_callers_callsite(methodOopDesc* moop, address ret_pc);
375 // Slow-path Locking and Unlocking
376 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* thread);
377 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock);
379 // Resolving of calls
380 static address resolve_static_call_C (JavaThread *thread);
381 static address resolve_virtual_call_C (JavaThread *thread);
382 static address resolve_opt_virtual_call_C(JavaThread *thread);
384 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.)
385 static void slow_arraycopy_C(oopDesc* src, jint src_pos,
386 oopDesc* dest, jint dest_pos,
387 jint length, JavaThread* thread);
389 // handle ic miss with caller being compiled code
390 // wrong method handling (inline cache misses, zombie methods)
391 static address handle_wrong_method(JavaThread* thread);
392 static address handle_wrong_method_ic_miss(JavaThread* thread);
394 #ifndef PRODUCT
396 // Collect and print inline cache miss statistics
397 private:
398 enum { maxICmiss_count = 100 };
399 static int _ICmiss_index; // length of IC miss histogram
400 static int _ICmiss_count[maxICmiss_count]; // miss counts
401 static address _ICmiss_at[maxICmiss_count]; // miss addresses
402 static void trace_ic_miss(address at);
404 public:
405 static int _monitor_enter_ctr; // monitor enter slow
406 static int _monitor_exit_ctr; // monitor exit slow
407 static int _throw_null_ctr; // throwing a null-pointer exception
408 static int _ic_miss_ctr; // total # of IC misses
409 static int _wrong_method_ctr;
410 static int _resolve_static_ctr;
411 static int _resolve_virtual_ctr;
412 static int _resolve_opt_virtual_ctr;
413 static int _implicit_null_throws;
414 static int _implicit_div0_throws;
416 static int _jbyte_array_copy_ctr; // Slow-path byte array copy
417 static int _jshort_array_copy_ctr; // Slow-path short array copy
418 static int _jint_array_copy_ctr; // Slow-path int array copy
419 static int _jlong_array_copy_ctr; // Slow-path long array copy
420 static int _oop_array_copy_ctr; // Slow-path oop array copy
421 static int _checkcast_array_copy_ctr; // Slow-path oop array copy, with cast
422 static int _unsafe_array_copy_ctr; // Slow-path includes alignment checks
423 static int _generic_array_copy_ctr; // Slow-path includes type decoding
424 static int _slow_array_copy_ctr; // Slow-path failed out to a method call
426 static int _new_instance_ctr; // 'new' object requires GC
427 static int _new_array_ctr; // 'new' array requires GC
428 static int _multi1_ctr, _multi2_ctr, _multi3_ctr, _multi4_ctr, _multi5_ctr;
429 static int _find_handler_ctr; // find exception handler
430 static int _rethrow_ctr; // rethrow exception
431 static int _mon_enter_stub_ctr; // monitor enter stub
432 static int _mon_exit_stub_ctr; // monitor exit stub
433 static int _mon_enter_ctr; // monitor enter slow
434 static int _mon_exit_ctr; // monitor exit slow
435 static int _partial_subtype_ctr; // SubRoutines::partial_subtype_check
437 // Statistics code
438 // stats for "normal" compiled calls (non-interface)
439 static int _nof_normal_calls; // total # of calls
440 static int _nof_optimized_calls; // total # of statically-bound calls
441 static int _nof_inlined_calls; // total # of inlined normal calls
442 static int _nof_static_calls; // total # of calls to static methods or super methods (invokespecial)
443 static int _nof_inlined_static_calls; // total # of inlined static calls
444 // stats for compiled interface calls
445 static int _nof_interface_calls; // total # of compiled calls
446 static int _nof_optimized_interface_calls; // total # of statically-bound interface calls
447 static int _nof_inlined_interface_calls; // total # of inlined interface calls
448 static int _nof_megamorphic_interface_calls;// total # of megamorphic interface calls
449 // stats for runtime exceptions
450 static int _nof_removable_exceptions; // total # of exceptions that could be replaced by branches due to inlining
452 public: // for compiler
453 static address nof_normal_calls_addr() { return (address)&_nof_normal_calls; }
454 static address nof_optimized_calls_addr() { return (address)&_nof_optimized_calls; }
455 static address nof_inlined_calls_addr() { return (address)&_nof_inlined_calls; }
456 static address nof_static_calls_addr() { return (address)&_nof_static_calls; }
457 static address nof_inlined_static_calls_addr() { return (address)&_nof_inlined_static_calls; }
458 static address nof_interface_calls_addr() { return (address)&_nof_interface_calls; }
459 static address nof_optimized_interface_calls_addr() { return (address)&_nof_optimized_interface_calls; }
460 static address nof_inlined_interface_calls_addr() { return (address)&_nof_inlined_interface_calls; }
461 static address nof_megamorphic_interface_calls_addr() { return (address)&_nof_megamorphic_interface_calls; }
462 static void print_call_statistics(int comp_total);
463 static void print_statistics();
464 static void print_ic_miss_histogram();
466 #endif // PRODUCT
467 };
470 // ---------------------------------------------------------------------------
471 // Implementation of AdapterHandlerLibrary
472 //
473 // This library manages argument marshaling adapters and native wrappers.
474 // There are 2 flavors of adapters: I2C and C2I.
475 //
476 // The I2C flavor takes a stock interpreted call setup, marshals the arguments
477 // for a Java-compiled call, and jumps to Rmethod-> code()->
478 // instructions_begin(). It is broken to call it without an nmethod assigned.
479 // The usual behavior is to lift any register arguments up out of the stack
480 // and possibly re-pack the extra arguments to be contigious. I2C adapters
481 // will save what the interpreter's stack pointer will be after arguments are
482 // popped, then adjust the interpreter's frame size to force alignment and
483 // possibly to repack the arguments. After re-packing, it jumps to the
484 // compiled code start. There are no safepoints in this adapter code and a GC
485 // cannot happen while marshaling is in progress.
486 //
487 // The C2I flavor takes a stock compiled call setup plus the target method in
488 // Rmethod, marshals the arguments for an interpreted call and jumps to
489 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been
490 // setup. Compiled frames are fixed-size and the args are likely not in the
491 // right place. Hence all the args will likely be copied into the
492 // interpreter's frame, forcing that frame to grow. The compiled frame's
493 // outgoing stack args will be dead after the copy.
494 //
495 // Native wrappers, like adapters, marshal arguments. Unlike adapters they
496 // also perform an offical frame push & pop. They have a call to the native
497 // routine in their middles and end in a return (instead of ending in a jump).
498 // The native wrappers are stored in real nmethods instead of the BufferBlobs
499 // used by the adapters. The code generation happens here because it's very
500 // similar to what the adapters have to do.
502 class AdapterHandlerEntry : public CHeapObj {
503 private:
504 address _i2c_entry;
505 address _c2i_entry;
506 address _c2i_unverified_entry;
508 public:
510 // The name we give all buffer blobs
511 static const char* name;
513 AdapterHandlerEntry(address i2c_entry, address c2i_entry, address c2i_unverified_entry):
514 _i2c_entry(i2c_entry),
515 _c2i_entry(c2i_entry),
516 _c2i_unverified_entry(c2i_unverified_entry) {
517 }
519 address get_i2c_entry() { return _i2c_entry; }
520 address get_c2i_entry() { return _c2i_entry; }
521 address get_c2i_unverified_entry() { return _c2i_unverified_entry; }
523 void relocate(address new_base);
524 #ifndef PRODUCT
525 void print();
526 #endif /* PRODUCT */
527 };
529 class AdapterHandlerLibrary: public AllStatic {
530 private:
531 static u_char _buffer[]; // the temporary code buffer
532 static GrowableArray<uint64_t>* _fingerprints; // the fingerprint collection
533 static GrowableArray<AdapterHandlerEntry*> * _handlers; // the corresponding handlers
534 enum {
535 AbstractMethodHandler = 1 // special handler for abstract methods
536 };
537 static void initialize();
538 static int get_create_adapter_index(methodHandle method);
539 static address get_i2c_entry( int index ) {
540 return get_entry(index)->get_i2c_entry();
541 }
542 static address get_c2i_entry( int index ) {
543 return get_entry(index)->get_c2i_entry();
544 }
545 static address get_c2i_unverified_entry( int index ) {
546 return get_entry(index)->get_c2i_unverified_entry();
547 }
549 public:
550 static AdapterHandlerEntry* get_entry( int index ) { return _handlers->at(index); }
551 static nmethod* create_native_wrapper(methodHandle method);
552 static AdapterHandlerEntry* get_adapter(methodHandle method) {
553 return get_entry(get_create_adapter_index(method));
554 }
555 #ifdef HAVE_DTRACE_H
556 static nmethod* create_dtrace_nmethod (methodHandle method);
557 #endif // HAVE_DTRACE_H
559 #ifndef PRODUCT
560 static void print_handler(CodeBlob* b);
561 static bool contains(CodeBlob* b);
562 #endif /* PRODUCT */
564 };