Mercurial > hg > truffle
annotate src/share/vm/runtime/sharedRuntime.hpp @ 1721:413ad0331a0c
6977924: Changes for 6975078 produce build error with certain gcc versions
Summary: The changes introduced for 6975078 assign badHeapOopVal to the _allocation field in the ResourceObj class. In 32 bit linux builds with certain versions of gcc this assignment will be flagged as an error while compiling allocation.cpp. In 32 bit builds the constant value badHeapOopVal (which is cast to an intptr_t) is negative. The _allocation field is typed as an unsigned intptr_t and gcc catches this as an error.
Reviewed-by: jcoomes, ysr, phh
| author | johnc |
|---|---|
| date | Wed, 18 Aug 2010 10:59:06 -0700 |
| parents | 126ea7725993 |
| children | 3e8fbc61cee8 |
| rev | line source |
|---|---|
| 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 class AdapterHandlerEntry; | |
|
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26 class AdapterHandlerTable; |
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27 class AdapterFingerPrint; |
| 0 | 28 class vframeStream; |
| 29 | |
| 30 // Runtime is the base class for various runtime interfaces | |
| 31 // (InterpreterRuntime, CompilerRuntime, etc.). It provides | |
| 32 // shared functionality such as exception forwarding (C++ to | |
| 33 // Java exceptions), locking/unlocking mechanisms, statistical | |
| 34 // information, etc. | |
| 35 | |
| 36 class SharedRuntime: AllStatic { | |
| 37 private: | |
| 38 static methodHandle resolve_sub_helper(JavaThread *thread, | |
| 39 bool is_virtual, | |
| 40 bool is_optimized, TRAPS); | |
| 41 | |
| 42 // Shared stub locations | |
| 43 | |
| 44 static RuntimeStub* _wrong_method_blob; | |
| 45 static RuntimeStub* _ic_miss_blob; | |
| 46 static RuntimeStub* _resolve_opt_virtual_call_blob; | |
| 47 static RuntimeStub* _resolve_virtual_call_blob; | |
| 48 static RuntimeStub* _resolve_static_call_blob; | |
| 49 | |
| 50 static SafepointBlob* _polling_page_safepoint_handler_blob; | |
| 51 static SafepointBlob* _polling_page_return_handler_blob; | |
| 52 #ifdef COMPILER2 | |
| 53 static ExceptionBlob* _exception_blob; | |
| 54 static UncommonTrapBlob* _uncommon_trap_blob; | |
| 55 #endif // COMPILER2 | |
| 56 | |
| 57 #ifndef PRODUCT | |
| 58 | |
| 59 // Counters | |
| 60 static int _nof_megamorphic_calls; // total # of megamorphic calls (through vtable) | |
| 61 | |
| 62 #endif // !PRODUCT | |
| 63 public: | |
|
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64 |
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65 // max bytes for each dtrace string parameter |
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66 enum { max_dtrace_string_size = 256 }; |
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67 |
| 0 | 68 // The following arithmetic routines are used on platforms that do |
| 69 // not have machine instructions to implement their functionality. | |
| 70 // Do not remove these. | |
| 71 | |
| 72 // long arithmetics | |
| 73 static jlong lmul(jlong y, jlong x); | |
| 74 static jlong ldiv(jlong y, jlong x); | |
| 75 static jlong lrem(jlong y, jlong x); | |
| 76 | |
| 77 // float and double remainder | |
| 78 static jfloat frem(jfloat x, jfloat y); | |
| 79 static jdouble drem(jdouble x, jdouble y); | |
| 80 | |
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81 #ifdef __SOFTFP__ |
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82 static jfloat fadd(jfloat x, jfloat y); |
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83 static jfloat fsub(jfloat x, jfloat y); |
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84 static jfloat fmul(jfloat x, jfloat y); |
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85 static jfloat fdiv(jfloat x, jfloat y); |
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86 |
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87 static jdouble dadd(jdouble x, jdouble y); |
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88 static jdouble dsub(jdouble x, jdouble y); |
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89 static jdouble dmul(jdouble x, jdouble y); |
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90 static jdouble ddiv(jdouble x, jdouble y); |
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91 #endif // __SOFTFP__ |
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92 |
| 0 | 93 // float conversion (needs to set appropriate rounding mode) |
| 94 static jint f2i (jfloat x); | |
| 95 static jlong f2l (jfloat x); | |
| 96 static jint d2i (jdouble x); | |
| 97 static jlong d2l (jdouble x); | |
| 98 static jfloat d2f (jdouble x); | |
| 99 static jfloat l2f (jlong x); | |
| 100 static jdouble l2d (jlong x); | |
| 101 | |
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102 #ifdef __SOFTFP__ |
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103 static jfloat i2f (jint x); |
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104 static jdouble i2d (jint x); |
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105 static jdouble f2d (jfloat x); |
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106 #endif // __SOFTFP__ |
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107 |
| 0 | 108 // double trigonometrics and transcendentals |
| 109 static jdouble dsin(jdouble x); | |
| 110 static jdouble dcos(jdouble x); | |
| 111 static jdouble dtan(jdouble x); | |
| 112 static jdouble dlog(jdouble x); | |
| 113 static jdouble dlog10(jdouble x); | |
| 114 static jdouble dexp(jdouble x); | |
| 115 static jdouble dpow(jdouble x, jdouble y); | |
| 116 | |
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117 #if defined(__SOFTFP__) || defined(E500V2) |
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118 static double dabs(double f); |
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119 static double dsqrt(double f); |
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120 #endif |
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121 |
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122 #ifdef __SOFTFP__ |
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123 // C++ compiler generates soft float instructions as well as passing |
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124 // float and double in registers. |
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125 static int fcmpl(float x, float y); |
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126 static int fcmpg(float x, float y); |
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127 static int dcmpl(double x, double y); |
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128 static int dcmpg(double x, double y); |
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129 |
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130 static int unordered_fcmplt(float x, float y); |
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131 static int unordered_dcmplt(double x, double y); |
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132 static int unordered_fcmple(float x, float y); |
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133 static int unordered_dcmple(double x, double y); |
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134 static int unordered_fcmpge(float x, float y); |
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135 static int unordered_dcmpge(double x, double y); |
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136 static int unordered_fcmpgt(float x, float y); |
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137 static int unordered_dcmpgt(double x, double y); |
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138 |
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139 static float fneg(float f); |
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140 static double dneg(double f); |
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141 #endif |
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142 |
| 0 | 143 // exception handling across interpreter/compiler boundaries |
| 1295 | 144 static address raw_exception_handler_for_return_address(JavaThread* thread, address return_address); |
| 145 static address exception_handler_for_return_address(JavaThread* thread, address return_address); | |
| 0 | 146 |
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147 #ifndef SERIALGC |
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148 // G1 write barriers |
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149 static void g1_wb_pre(oopDesc* orig, JavaThread *thread); |
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150 static void g1_wb_post(void* card_addr, JavaThread* thread); |
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151 #endif // !SERIALGC |
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152 |
| 0 | 153 // exception handling and implicit exceptions |
| 154 static address compute_compiled_exc_handler(nmethod* nm, address ret_pc, Handle& exception, | |
| 155 bool force_unwind, bool top_frame_only); | |
| 156 enum ImplicitExceptionKind { | |
| 157 IMPLICIT_NULL, | |
| 158 IMPLICIT_DIVIDE_BY_ZERO, | |
| 159 STACK_OVERFLOW | |
| 160 }; | |
| 161 static void throw_AbstractMethodError(JavaThread* thread); | |
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162 static void throw_IncompatibleClassChangeError(JavaThread* thread); |
| 0 | 163 static void throw_ArithmeticException(JavaThread* thread); |
| 164 static void throw_NullPointerException(JavaThread* thread); | |
| 165 static void throw_NullPointerException_at_call(JavaThread* thread); | |
| 166 static void throw_StackOverflowError(JavaThread* thread); | |
| 167 static address continuation_for_implicit_exception(JavaThread* thread, | |
| 168 address faulting_pc, | |
| 169 ImplicitExceptionKind exception_kind); | |
| 170 | |
| 171 // Shared stub locations | |
| 172 static address get_poll_stub(address pc); | |
| 173 | |
| 174 static address get_ic_miss_stub() { | |
| 175 assert(_ic_miss_blob!= NULL, "oops"); | |
| 176 return _ic_miss_blob->instructions_begin(); | |
| 177 } | |
| 178 | |
| 179 static address get_handle_wrong_method_stub() { | |
| 180 assert(_wrong_method_blob!= NULL, "oops"); | |
| 181 return _wrong_method_blob->instructions_begin(); | |
| 182 } | |
| 183 | |
| 184 #ifdef COMPILER2 | |
| 185 static void generate_uncommon_trap_blob(void); | |
| 186 static UncommonTrapBlob* uncommon_trap_blob() { return _uncommon_trap_blob; } | |
| 187 #endif // COMPILER2 | |
| 188 | |
| 189 static address get_resolve_opt_virtual_call_stub(){ | |
| 190 assert(_resolve_opt_virtual_call_blob != NULL, "oops"); | |
| 191 return _resolve_opt_virtual_call_blob->instructions_begin(); | |
| 192 } | |
| 193 static address get_resolve_virtual_call_stub() { | |
| 194 assert(_resolve_virtual_call_blob != NULL, "oops"); | |
| 195 return _resolve_virtual_call_blob->instructions_begin(); | |
| 196 } | |
| 197 static address get_resolve_static_call_stub() { | |
| 198 assert(_resolve_static_call_blob != NULL, "oops"); | |
| 199 return _resolve_static_call_blob->instructions_begin(); | |
| 200 } | |
| 201 | |
| 202 static SafepointBlob* polling_page_return_handler_blob() { return _polling_page_return_handler_blob; } | |
| 203 static SafepointBlob* polling_page_safepoint_handler_blob() { return _polling_page_safepoint_handler_blob; } | |
| 204 | |
| 205 // Counters | |
| 206 #ifndef PRODUCT | |
| 207 static address nof_megamorphic_calls_addr() { return (address)&_nof_megamorphic_calls; } | |
| 208 #endif // PRODUCT | |
| 209 | |
| 210 // Helper routine for full-speed JVMTI exception throwing support | |
| 211 static void throw_and_post_jvmti_exception(JavaThread *thread, Handle h_exception); | |
| 212 static void throw_and_post_jvmti_exception(JavaThread *thread, symbolOop name, const char *message = NULL); | |
| 213 | |
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214 // RedefineClasses() tracing support for obsolete method entry |
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215 static int rc_trace_method_entry(JavaThread* thread, methodOopDesc* m); |
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216 |
| 0 | 217 // To be used as the entry point for unresolved native methods. |
| 218 static address native_method_throw_unsatisfied_link_error_entry(); | |
| 219 | |
| 220 // bytecode tracing is only used by the TraceBytecodes | |
| 221 static intptr_t trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2) PRODUCT_RETURN0; | |
| 222 | |
| 223 // Used to back off a spin lock that is under heavy contention | |
| 224 static void yield_all(JavaThread* thread, int attempts = 0); | |
| 225 | |
| 226 static oop retrieve_receiver( symbolHandle sig, frame caller ); | |
| 227 | |
| 228 static void register_finalizer(JavaThread* thread, oopDesc* obj); | |
| 229 | |
| 230 // dtrace notifications | |
| 231 static int dtrace_object_alloc(oopDesc* o); | |
| 232 static int dtrace_object_alloc_base(Thread* thread, oopDesc* o); | |
| 233 static int dtrace_method_entry(JavaThread* thread, methodOopDesc* m); | |
| 234 static int dtrace_method_exit(JavaThread* thread, methodOopDesc* m); | |
| 235 | |
| 236 // Utility method for retrieving the Java thread id, returns 0 if the | |
| 237 // thread is not a well formed Java thread. | |
| 238 static jlong get_java_tid(Thread* thread); | |
| 239 | |
| 240 | |
| 241 // used by native wrappers to reenable yellow if overflow happened in native code | |
| 242 static void reguard_yellow_pages(); | |
| 243 | |
| 244 /** | |
| 245 * Fill in the "X cannot be cast to a Y" message for ClassCastException | |
| 246 * | |
| 247 * @param thr the current thread | |
| 248 * @param name the name of the class of the object attempted to be cast | |
| 249 * @return the dynamically allocated exception message (must be freed | |
| 250 * by the caller using a resource mark) | |
| 251 * | |
| 252 * BCP must refer to the current 'checkcast' opcode for the frame | |
| 253 * on top of the stack. | |
| 254 * The caller (or one of it's callers) must use a ResourceMark | |
| 255 * in order to correctly free the result. | |
| 256 */ | |
| 257 static char* generate_class_cast_message(JavaThread* thr, const char* name); | |
| 258 | |
| 259 /** | |
| 710 | 260 * Fill in the message for a WrongMethodTypeException |
| 261 * | |
| 262 * @param thr the current thread | |
| 263 * @param mtype (optional) expected method type (or argument class) | |
| 264 * @param mhandle (optional) actual method handle (or argument) | |
| 265 * @return the dynamically allocated exception message | |
| 266 * | |
| 267 * BCP for the frame on top of the stack must refer to an | |
| 268 * 'invokevirtual' op for a method handle, or an 'invokedyamic' op. | |
| 269 * The caller (or one of its callers) must use a ResourceMark | |
| 270 * in order to correctly free the result. | |
| 271 */ | |
| 272 static char* generate_wrong_method_type_message(JavaThread* thr, | |
| 273 oopDesc* mtype = NULL, | |
| 274 oopDesc* mhandle = NULL); | |
| 275 | |
| 276 /** Return non-null if the mtype is a klass or Class, not a MethodType. */ | |
| 277 static oop wrong_method_type_is_for_single_argument(JavaThread* thr, | |
| 278 oopDesc* mtype); | |
| 279 | |
| 280 /** | |
| 0 | 281 * Fill in the "X cannot be cast to a Y" message for ClassCastException |
| 282 * | |
| 283 * @param name the name of the class of the object attempted to be cast | |
| 284 * @param klass the name of the target klass attempt | |
| 710 | 285 * @param gripe the specific kind of problem being reported |
| 0 | 286 * @return the dynamically allocated exception message (must be freed |
| 287 * by the caller using a resource mark) | |
| 288 * | |
| 289 * This version does not require access the frame, so it can be called | |
| 290 * from interpreted code | |
| 291 * The caller (or one of it's callers) must use a ResourceMark | |
| 292 * in order to correctly free the result. | |
| 293 */ | |
| 710 | 294 static char* generate_class_cast_message(const char* name, const char* klass, |
| 295 const char* gripe = " cannot be cast to "); | |
| 0 | 296 |
| 297 // Resolves a call site- may patch in the destination of the call into the | |
| 298 // compiled code. | |
| 299 static methodHandle resolve_helper(JavaThread *thread, | |
| 300 bool is_virtual, | |
| 301 bool is_optimized, TRAPS); | |
| 302 | |
| 303 static void generate_stubs(void); | |
| 304 | |
| 305 private: | |
| 306 // deopt blob | |
| 307 static void generate_deopt_blob(void); | |
| 308 static DeoptimizationBlob* _deopt_blob; | |
| 309 | |
| 310 public: | |
| 311 static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; } | |
| 312 | |
| 313 // Resets a call-site in compiled code so it will get resolved again. | |
| 314 static methodHandle reresolve_call_site(JavaThread *thread, TRAPS); | |
| 315 | |
| 316 // In the code prolog, if the klass comparison fails, the inline cache | |
| 317 // misses and the call site is patched to megamorphic | |
| 318 static methodHandle handle_ic_miss_helper(JavaThread* thread, TRAPS); | |
| 319 | |
| 320 // Find the method that called us. | |
| 321 static methodHandle find_callee_method(JavaThread* thread, TRAPS); | |
| 322 | |
| 323 | |
| 324 private: | |
| 325 static Handle find_callee_info(JavaThread* thread, | |
| 326 Bytecodes::Code& bc, | |
| 327 CallInfo& callinfo, TRAPS); | |
| 328 static Handle find_callee_info_helper(JavaThread* thread, | |
| 329 vframeStream& vfst, | |
| 330 Bytecodes::Code& bc, | |
| 331 CallInfo& callinfo, TRAPS); | |
| 332 | |
| 333 static address clean_virtual_call_entry(); | |
| 334 static address clean_opt_virtual_call_entry(); | |
| 335 static address clean_static_call_entry(); | |
| 336 | |
| 337 public: | |
| 338 | |
| 339 // Read the array of BasicTypes from a Java signature, and compute where | |
| 340 // compiled Java code would like to put the results. Values in reg_lo and | |
| 341 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are | |
| 342 // registers, those above refer to 4-byte stack slots. All stack slots are | |
| 343 // based off of the window top. SharedInfo::stack0 refers to the first usable | |
| 344 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word | |
| 345 // 4-bytes higher. So for sparc because the register window save area is at | |
| 346 // the bottom of the frame the first 16 words will be skipped and SharedInfo::stack0 | |
| 347 // will be just above it. ( | |
| 348 // return value is the maximum number of VMReg stack slots the convention will use. | |
| 349 static int java_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed, int is_outgoing); | |
| 350 | |
| 351 // Ditto except for calling C | |
| 352 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, int total_args_passed); | |
| 353 | |
| 354 // Generate I2C and C2I adapters. These adapters are simple argument marshalling | |
| 355 // blobs. Unlike adapters in the tiger and earlier releases the code in these | |
| 356 // blobs does not create a new frame and are therefore virtually invisible | |
| 357 // to the stack walking code. In general these blobs extend the callers stack | |
| 358 // as needed for the conversion of argument locations. | |
| 359 | |
| 360 // When calling a c2i blob the code will always call the interpreter even if | |
| 361 // by the time we reach the blob there is compiled code available. This allows | |
| 362 // the blob to pass the incoming stack pointer (the sender sp) in a known | |
| 363 // location for the interpreter to record. This is used by the frame code | |
| 364 // to correct the sender code to match up with the stack pointer when the | |
| 365 // thread left the compiled code. In addition it allows the interpreter | |
| 366 // to remove the space the c2i adapter allocated to do it argument conversion. | |
| 367 | |
| 368 // Although a c2i blob will always run interpreted even if compiled code is | |
| 369 // present if we see that compiled code is present the compiled call site | |
| 370 // will be patched/re-resolved so that later calls will run compiled. | |
| 371 | |
| 372 // Aditionally a c2i blob need to have a unverified entry because it can be reached | |
| 373 // in situations where the call site is an inlined cache site and may go megamorphic. | |
| 374 | |
| 375 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed | |
| 376 // that the interpreter before it does any call dispatch will record the current | |
| 377 // stack pointer in the interpreter frame. On return it will restore the stack | |
| 378 // pointer as needed. This means the i2c adapter code doesn't need any special | |
| 379 // handshaking path with compiled code to keep the stack walking correct. | |
| 380 | |
| 381 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *_masm, | |
| 382 int total_args_passed, | |
| 383 int max_arg, | |
| 384 const BasicType *sig_bt, | |
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385 const VMRegPair *regs, |
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386 AdapterFingerPrint* fingerprint); |
| 0 | 387 |
| 388 // OSR support | |
| 389 | |
| 390 // OSR_migration_begin will extract the jvm state from an interpreter | |
| 391 // frame (locals, monitors) and store the data in a piece of C heap | |
| 392 // storage. This then allows the interpreter frame to be removed from the | |
| 393 // stack and the OSR nmethod to be called. That method is called with a | |
| 394 // pointer to the C heap storage. This pointer is the return value from | |
| 395 // OSR_migration_begin. | |
| 396 | |
| 397 static intptr_t* OSR_migration_begin( JavaThread *thread); | |
| 398 | |
| 399 // OSR_migration_end is a trivial routine. It is called after the compiled | |
| 400 // method has extracted the jvm state from the C heap that OSR_migration_begin | |
| 401 // created. It's entire job is to simply free this storage. | |
| 402 static void OSR_migration_end ( intptr_t* buf); | |
| 403 | |
| 404 // Convert a sig into a calling convention register layout | |
| 405 // and find interesting things about it. | |
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406 static VMRegPair* find_callee_arguments(symbolOop sig, bool has_receiver, int *arg_size); |
| 0 | 407 static VMReg name_for_receiver(); |
| 408 | |
| 409 // "Top of Stack" slots that may be unused by the calling convention but must | |
| 410 // otherwise be preserved. | |
| 411 // On Intel these are not necessary and the value can be zero. | |
| 412 // On Sparc this describes the words reserved for storing a register window | |
| 413 // when an interrupt occurs. | |
| 414 static uint out_preserve_stack_slots(); | |
| 415 | |
| 416 // Save and restore a native result | |
| 417 static void save_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots ); | |
| 418 static void restore_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots ); | |
| 419 | |
| 420 // Generate a native wrapper for a given method. The method takes arguments | |
| 421 // in the Java compiled code convention, marshals them to the native | |
| 422 // convention (handlizes oops, etc), transitions to native, makes the call, | |
| 423 // returns to java state (possibly blocking), unhandlizes any result and | |
| 424 // returns. | |
| 425 static nmethod *generate_native_wrapper(MacroAssembler* masm, | |
| 426 methodHandle method, | |
| 427 int total_args_passed, | |
| 428 int max_arg, | |
| 429 BasicType *sig_bt, | |
| 430 VMRegPair *regs, | |
| 431 BasicType ret_type ); | |
| 432 | |
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433 #ifdef HAVE_DTRACE_H |
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434 // Generate a dtrace wrapper for a given method. The method takes arguments |
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435 // in the Java compiled code convention, marshals them to the native |
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436 // convention (handlizes oops, etc), transitions to native, makes the call, |
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437 // returns to java state (possibly blocking), unhandlizes any result and |
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438 // returns. |
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439 static nmethod *generate_dtrace_nmethod(MacroAssembler* masm, |
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440 methodHandle method); |
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441 |
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442 // dtrace support to convert a Java string to utf8 |
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443 static void get_utf(oopDesc* src, address dst); |
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444 #endif // def HAVE_DTRACE_H |
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445 |
| 0 | 446 // A compiled caller has just called the interpreter, but compiled code |
| 447 // exists. Patch the caller so he no longer calls into the interpreter. | |
| 448 static void fixup_callers_callsite(methodOopDesc* moop, address ret_pc); | |
| 449 | |
| 450 // Slow-path Locking and Unlocking | |
| 451 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* thread); | |
| 452 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock); | |
| 453 | |
| 454 // Resolving of calls | |
| 455 static address resolve_static_call_C (JavaThread *thread); | |
| 456 static address resolve_virtual_call_C (JavaThread *thread); | |
| 457 static address resolve_opt_virtual_call_C(JavaThread *thread); | |
| 458 | |
| 459 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.) | |
| 460 static void slow_arraycopy_C(oopDesc* src, jint src_pos, | |
| 461 oopDesc* dest, jint dest_pos, | |
| 462 jint length, JavaThread* thread); | |
| 463 | |
| 464 // handle ic miss with caller being compiled code | |
| 465 // wrong method handling (inline cache misses, zombie methods) | |
| 466 static address handle_wrong_method(JavaThread* thread); | |
| 467 static address handle_wrong_method_ic_miss(JavaThread* thread); | |
| 468 | |
| 469 #ifndef PRODUCT | |
| 470 | |
| 471 // Collect and print inline cache miss statistics | |
| 472 private: | |
| 473 enum { maxICmiss_count = 100 }; | |
| 474 static int _ICmiss_index; // length of IC miss histogram | |
| 475 static int _ICmiss_count[maxICmiss_count]; // miss counts | |
| 476 static address _ICmiss_at[maxICmiss_count]; // miss addresses | |
| 477 static void trace_ic_miss(address at); | |
| 478 | |
| 479 public: | |
| 480 static int _monitor_enter_ctr; // monitor enter slow | |
| 481 static int _monitor_exit_ctr; // monitor exit slow | |
| 482 static int _throw_null_ctr; // throwing a null-pointer exception | |
| 483 static int _ic_miss_ctr; // total # of IC misses | |
| 484 static int _wrong_method_ctr; | |
| 485 static int _resolve_static_ctr; | |
| 486 static int _resolve_virtual_ctr; | |
| 487 static int _resolve_opt_virtual_ctr; | |
| 488 static int _implicit_null_throws; | |
| 489 static int _implicit_div0_throws; | |
| 490 | |
| 491 static int _jbyte_array_copy_ctr; // Slow-path byte array copy | |
| 492 static int _jshort_array_copy_ctr; // Slow-path short array copy | |
| 493 static int _jint_array_copy_ctr; // Slow-path int array copy | |
| 494 static int _jlong_array_copy_ctr; // Slow-path long array copy | |
| 495 static int _oop_array_copy_ctr; // Slow-path oop array copy | |
| 496 static int _checkcast_array_copy_ctr; // Slow-path oop array copy, with cast | |
| 497 static int _unsafe_array_copy_ctr; // Slow-path includes alignment checks | |
| 498 static int _generic_array_copy_ctr; // Slow-path includes type decoding | |
| 499 static int _slow_array_copy_ctr; // Slow-path failed out to a method call | |
| 500 | |
| 501 static int _new_instance_ctr; // 'new' object requires GC | |
| 502 static int _new_array_ctr; // 'new' array requires GC | |
| 503 static int _multi1_ctr, _multi2_ctr, _multi3_ctr, _multi4_ctr, _multi5_ctr; | |
| 504 static int _find_handler_ctr; // find exception handler | |
| 505 static int _rethrow_ctr; // rethrow exception | |
| 506 static int _mon_enter_stub_ctr; // monitor enter stub | |
| 507 static int _mon_exit_stub_ctr; // monitor exit stub | |
| 508 static int _mon_enter_ctr; // monitor enter slow | |
| 509 static int _mon_exit_ctr; // monitor exit slow | |
| 510 static int _partial_subtype_ctr; // SubRoutines::partial_subtype_check | |
| 511 | |
| 512 // Statistics code | |
| 513 // stats for "normal" compiled calls (non-interface) | |
| 514 static int _nof_normal_calls; // total # of calls | |
| 515 static int _nof_optimized_calls; // total # of statically-bound calls | |
| 516 static int _nof_inlined_calls; // total # of inlined normal calls | |
| 517 static int _nof_static_calls; // total # of calls to static methods or super methods (invokespecial) | |
| 518 static int _nof_inlined_static_calls; // total # of inlined static calls | |
| 519 // stats for compiled interface calls | |
| 520 static int _nof_interface_calls; // total # of compiled calls | |
| 521 static int _nof_optimized_interface_calls; // total # of statically-bound interface calls | |
| 522 static int _nof_inlined_interface_calls; // total # of inlined interface calls | |
| 523 static int _nof_megamorphic_interface_calls;// total # of megamorphic interface calls | |
| 524 // stats for runtime exceptions | |
| 525 static int _nof_removable_exceptions; // total # of exceptions that could be replaced by branches due to inlining | |
| 526 | |
| 527 public: // for compiler | |
| 528 static address nof_normal_calls_addr() { return (address)&_nof_normal_calls; } | |
| 529 static address nof_optimized_calls_addr() { return (address)&_nof_optimized_calls; } | |
| 530 static address nof_inlined_calls_addr() { return (address)&_nof_inlined_calls; } | |
| 531 static address nof_static_calls_addr() { return (address)&_nof_static_calls; } | |
| 532 static address nof_inlined_static_calls_addr() { return (address)&_nof_inlined_static_calls; } | |
| 533 static address nof_interface_calls_addr() { return (address)&_nof_interface_calls; } | |
| 534 static address nof_optimized_interface_calls_addr() { return (address)&_nof_optimized_interface_calls; } | |
| 535 static address nof_inlined_interface_calls_addr() { return (address)&_nof_inlined_interface_calls; } | |
| 536 static address nof_megamorphic_interface_calls_addr() { return (address)&_nof_megamorphic_interface_calls; } | |
| 537 static void print_call_statistics(int comp_total); | |
| 538 static void print_statistics(); | |
| 539 static void print_ic_miss_histogram(); | |
| 540 | |
| 541 #endif // PRODUCT | |
| 542 }; | |
| 543 | |
| 544 | |
| 545 // --------------------------------------------------------------------------- | |
| 546 // Implementation of AdapterHandlerLibrary | |
| 547 // | |
| 548 // This library manages argument marshaling adapters and native wrappers. | |
| 549 // There are 2 flavors of adapters: I2C and C2I. | |
| 550 // | |
| 551 // The I2C flavor takes a stock interpreted call setup, marshals the arguments | |
| 552 // for a Java-compiled call, and jumps to Rmethod-> code()-> | |
| 553 // instructions_begin(). It is broken to call it without an nmethod assigned. | |
| 554 // The usual behavior is to lift any register arguments up out of the stack | |
| 555 // and possibly re-pack the extra arguments to be contigious. I2C adapters | |
| 556 // will save what the interpreter's stack pointer will be after arguments are | |
| 557 // popped, then adjust the interpreter's frame size to force alignment and | |
| 558 // possibly to repack the arguments. After re-packing, it jumps to the | |
| 559 // compiled code start. There are no safepoints in this adapter code and a GC | |
| 560 // cannot happen while marshaling is in progress. | |
| 561 // | |
| 562 // The C2I flavor takes a stock compiled call setup plus the target method in | |
| 563 // Rmethod, marshals the arguments for an interpreted call and jumps to | |
| 564 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been | |
| 565 // setup. Compiled frames are fixed-size and the args are likely not in the | |
| 566 // right place. Hence all the args will likely be copied into the | |
| 567 // interpreter's frame, forcing that frame to grow. The compiled frame's | |
| 568 // outgoing stack args will be dead after the copy. | |
| 569 // | |
| 570 // Native wrappers, like adapters, marshal arguments. Unlike adapters they | |
| 571 // also perform an offical frame push & pop. They have a call to the native | |
| 572 // routine in their middles and end in a return (instead of ending in a jump). | |
| 573 // The native wrappers are stored in real nmethods instead of the BufferBlobs | |
| 574 // used by the adapters. The code generation happens here because it's very | |
| 575 // similar to what the adapters have to do. | |
| 576 | |
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577 class AdapterHandlerEntry : public BasicHashtableEntry { |
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578 friend class AdapterHandlerTable; |
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579 |
| 0 | 580 private: |
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581 AdapterFingerPrint* _fingerprint; |
| 0 | 582 address _i2c_entry; |
| 583 address _c2i_entry; | |
| 584 address _c2i_unverified_entry; | |
| 585 | |
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586 #ifdef ASSERT |
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587 // Captures code and signature used to generate this adapter when |
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588 // verifing adapter equivalence. |
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589 unsigned char* _saved_code; |
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590 int _code_length; |
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591 BasicType* _saved_sig; |
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592 int _total_args_passed; |
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593 #endif |
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594 |
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595 void init(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry, address c2i_unverified_entry) { |
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596 _fingerprint = fingerprint; |
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597 _i2c_entry = i2c_entry; |
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598 _c2i_entry = c2i_entry; |
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599 _c2i_unverified_entry = c2i_unverified_entry; |
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600 #ifdef ASSERT |
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601 _saved_code = NULL; |
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602 _code_length = 0; |
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603 _saved_sig = NULL; |
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604 _total_args_passed = 0; |
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605 #endif |
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606 } |
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607 |
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608 void deallocate(); |
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609 |
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610 // should never be used |
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611 AdapterHandlerEntry(); |
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612 |
| 0 | 613 public: |
| 614 address get_i2c_entry() { return _i2c_entry; } | |
| 615 address get_c2i_entry() { return _c2i_entry; } | |
| 616 address get_c2i_unverified_entry() { return _c2i_unverified_entry; } | |
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617 |
| 0 | 618 void relocate(address new_base); |
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619 |
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620 AdapterFingerPrint* fingerprint() { return _fingerprint; } |
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621 |
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622 AdapterHandlerEntry* next() { |
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623 return (AdapterHandlerEntry*)BasicHashtableEntry::next(); |
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624 } |
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625 |
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626 #ifdef ASSERT |
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627 // Used to verify that code generated for shared adapters is equivalent |
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628 void save_code(unsigned char* code, int length, int total_args_passed, BasicType* sig_bt); |
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629 bool compare_code(unsigned char* code, int length, int total_args_passed, BasicType* sig_bt); |
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630 #endif |
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631 |
| 0 | 632 void print(); |
| 633 }; | |
| 634 | |
| 635 class AdapterHandlerLibrary: public AllStatic { | |
| 636 private: | |
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637 static BufferBlob* _buffer; // the temporary code buffer in CodeCache |
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638 static AdapterHandlerTable* _adapters; |
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639 static AdapterHandlerEntry* _abstract_method_handler; |
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640 static BufferBlob* buffer_blob(); |
| 0 | 641 static void initialize(); |
| 642 | |
| 643 public: | |
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644 |
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645 static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint, |
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646 address i2c_entry, address c2i_entry, address c2i_unverified_entry); |
| 0 | 647 static nmethod* create_native_wrapper(methodHandle method); |
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648 static AdapterHandlerEntry* get_adapter(methodHandle method); |
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649 |
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650 #ifdef HAVE_DTRACE_H |
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651 static nmethod* create_dtrace_nmethod (methodHandle method); |
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652 #endif // HAVE_DTRACE_H |
| 0 | 653 |
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654 static void print_handler(CodeBlob* b) { print_handler_on(tty, b); } |
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655 static void print_handler_on(outputStream* st, CodeBlob* b); |
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656 static bool contains(CodeBlob* b); |
| 0 | 657 #ifndef PRODUCT |
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658 static void print_statistics(); |
| 0 | 659 #endif /* PRODUCT */ |
| 660 | |
| 661 }; |