Mercurial > hg > graal-compiler
annotate src/share/vm/runtime/sharedRuntime.hpp @ 18041:52b4284cb496
Merge with jdk8u20-b26
| author | Gilles Duboscq <duboscq@ssw.jku.at> |
|---|---|
| date | Wed, 15 Oct 2014 16:02:50 +0200 |
| parents | 89152779163c cf9f24de0b93 |
| children | be896a1983c0 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_RUNTIME_SHAREDRUNTIME_HPP |
| 26 #define SHARE_VM_RUNTIME_SHAREDRUNTIME_HPP | |
| 27 | |
| 28 #include "interpreter/bytecodeHistogram.hpp" | |
| 29 #include "interpreter/bytecodeTracer.hpp" | |
| 30 #include "interpreter/linkResolver.hpp" | |
| 31 #include "memory/allocation.hpp" | |
| 32 #include "memory/resourceArea.hpp" | |
| 33 #include "runtime/threadLocalStorage.hpp" | |
| 34 #include "utilities/hashtable.hpp" | |
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35 #include "utilities/macros.hpp" |
| 1972 | 36 |
| 0 | 37 class AdapterHandlerEntry; |
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38 class AdapterHandlerTable; |
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39 class AdapterFingerPrint; |
| 0 | 40 class vframeStream; |
| 41 | |
| 42 // Runtime is the base class for various runtime interfaces | |
| 43 // (InterpreterRuntime, CompilerRuntime, etc.). It provides | |
| 44 // shared functionality such as exception forwarding (C++ to | |
| 45 // Java exceptions), locking/unlocking mechanisms, statistical | |
| 46 // information, etc. | |
| 47 | |
| 48 class SharedRuntime: AllStatic { | |
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49 friend class VMStructs; |
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50 |
| 0 | 51 private: |
| 52 static methodHandle resolve_sub_helper(JavaThread *thread, | |
| 53 bool is_virtual, | |
| 54 bool is_optimized, TRAPS); | |
| 55 | |
| 56 // Shared stub locations | |
| 57 | |
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58 static RuntimeStub* _wrong_method_blob; |
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59 static RuntimeStub* _wrong_method_abstract_blob; |
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60 static RuntimeStub* _ic_miss_blob; |
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61 static RuntimeStub* _resolve_opt_virtual_call_blob; |
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62 static RuntimeStub* _resolve_virtual_call_blob; |
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63 static RuntimeStub* _resolve_static_call_blob; |
| 0 | 64 |
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65 static DeoptimizationBlob* _deopt_blob; |
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66 |
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67 static SafepointBlob* _polling_page_vectors_safepoint_handler_blob; |
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68 static SafepointBlob* _polling_page_safepoint_handler_blob; |
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69 static SafepointBlob* _polling_page_return_handler_blob; |
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70 |
| 0 | 71 #ifdef COMPILER2 |
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72 static UncommonTrapBlob* _uncommon_trap_blob; |
| 0 | 73 #endif // COMPILER2 |
| 74 | |
| 75 #ifndef PRODUCT | |
| 76 // Counters | |
| 77 static int _nof_megamorphic_calls; // total # of megamorphic calls (through vtable) | |
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78 #endif // !PRODUCT |
| 0 | 79 |
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80 private: |
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81 enum { POLL_AT_RETURN, POLL_AT_LOOP, POLL_AT_VECTOR_LOOP }; |
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82 static SafepointBlob* generate_handler_blob(address call_ptr, int poll_type); |
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83 static RuntimeStub* generate_resolve_blob(address destination, const char* name); |
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84 |
| 0 | 85 public: |
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86 static void generate_stubs(void); |
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87 |
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88 // max bytes for each dtrace string parameter |
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89 enum { max_dtrace_string_size = 256 }; |
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90 |
| 0 | 91 // The following arithmetic routines are used on platforms that do |
| 92 // not have machine instructions to implement their functionality. | |
| 93 // Do not remove these. | |
| 94 | |
| 95 // long arithmetics | |
| 96 static jlong lmul(jlong y, jlong x); | |
| 97 static jlong ldiv(jlong y, jlong x); | |
| 98 static jlong lrem(jlong y, jlong x); | |
| 99 | |
| 100 // float and double remainder | |
| 101 static jfloat frem(jfloat x, jfloat y); | |
| 102 static jdouble drem(jdouble x, jdouble y); | |
| 103 | |
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104 #ifdef __SOFTFP__ |
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105 static jfloat fadd(jfloat x, jfloat y); |
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106 static jfloat fsub(jfloat x, jfloat y); |
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107 static jfloat fmul(jfloat x, jfloat y); |
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108 static jfloat fdiv(jfloat x, jfloat y); |
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109 |
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110 static jdouble dadd(jdouble x, jdouble y); |
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111 static jdouble dsub(jdouble x, jdouble y); |
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112 static jdouble dmul(jdouble x, jdouble y); |
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113 static jdouble ddiv(jdouble x, jdouble y); |
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114 #endif // __SOFTFP__ |
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115 |
| 0 | 116 // float conversion (needs to set appropriate rounding mode) |
| 117 static jint f2i (jfloat x); | |
| 118 static jlong f2l (jfloat x); | |
| 119 static jint d2i (jdouble x); | |
| 120 static jlong d2l (jdouble x); | |
| 121 static jfloat d2f (jdouble x); | |
| 122 static jfloat l2f (jlong x); | |
| 123 static jdouble l2d (jlong x); | |
| 124 | |
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125 #ifdef __SOFTFP__ |
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126 static jfloat i2f (jint x); |
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127 static jdouble i2d (jint x); |
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128 static jdouble f2d (jfloat x); |
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129 #endif // __SOFTFP__ |
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130 |
| 0 | 131 // double trigonometrics and transcendentals |
| 132 static jdouble dsin(jdouble x); | |
| 133 static jdouble dcos(jdouble x); | |
| 134 static jdouble dtan(jdouble x); | |
| 135 static jdouble dlog(jdouble x); | |
| 136 static jdouble dlog10(jdouble x); | |
| 137 static jdouble dexp(jdouble x); | |
| 138 static jdouble dpow(jdouble x, jdouble y); | |
| 139 | |
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140 #if defined(__SOFTFP__) || defined(E500V2) |
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141 static double dabs(double f); |
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142 #endif |
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143 |
| 14390 | 144 #if defined(__SOFTFP__) || defined(PPC32) |
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145 static double dsqrt(double f); |
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146 #endif |
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147 |
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148 #ifdef __SOFTFP__ |
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149 // C++ compiler generates soft float instructions as well as passing |
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150 // float and double in registers. |
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151 static int fcmpl(float x, float y); |
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152 static int fcmpg(float x, float y); |
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153 static int dcmpl(double x, double y); |
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154 static int dcmpg(double x, double y); |
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155 |
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156 static int unordered_fcmplt(float x, float y); |
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157 static int unordered_dcmplt(double x, double y); |
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158 static int unordered_fcmple(float x, float y); |
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159 static int unordered_dcmple(double x, double y); |
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160 static int unordered_fcmpge(float x, float y); |
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161 static int unordered_dcmpge(double x, double y); |
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162 static int unordered_fcmpgt(float x, float y); |
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163 static int unordered_dcmpgt(double x, double y); |
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164 |
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165 static float fneg(float f); |
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166 static double dneg(double f); |
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167 #endif |
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168 |
| 0 | 169 // exception handling across interpreter/compiler boundaries |
| 1295 | 170 static address raw_exception_handler_for_return_address(JavaThread* thread, address return_address); |
| 171 static address exception_handler_for_return_address(JavaThread* thread, address return_address); | |
| 0 | 172 |
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173 #if INCLUDE_ALL_GCS |
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174 // G1 write barriers |
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175 static void g1_wb_pre(oopDesc* orig, JavaThread *thread); |
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176 static void g1_wb_post(void* card_addr, JavaThread* thread); |
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177 #endif // INCLUDE_ALL_GCS |
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178 |
| 0 | 179 // exception handling and implicit exceptions |
| 180 static address compute_compiled_exc_handler(nmethod* nm, address ret_pc, Handle& exception, | |
| 181 bool force_unwind, bool top_frame_only); | |
| 182 enum ImplicitExceptionKind { | |
| 183 IMPLICIT_NULL, | |
| 184 IMPLICIT_DIVIDE_BY_ZERO, | |
| 185 STACK_OVERFLOW | |
| 186 }; | |
| 187 static void throw_AbstractMethodError(JavaThread* thread); | |
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188 static void throw_IncompatibleClassChangeError(JavaThread* thread); |
| 0 | 189 static void throw_ArithmeticException(JavaThread* thread); |
| 190 static void throw_NullPointerException(JavaThread* thread); | |
| 191 static void throw_NullPointerException_at_call(JavaThread* thread); | |
| 192 static void throw_StackOverflowError(JavaThread* thread); | |
| 193 static address continuation_for_implicit_exception(JavaThread* thread, | |
| 194 address faulting_pc, | |
| 195 ImplicitExceptionKind exception_kind); | |
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196 #ifdef GRAAL |
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197 static address deoptimize_for_implicit_exception(JavaThread* thread, address pc, nmethod* nm, int deopt_reason); |
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198 #endif |
| 0 | 199 |
| 200 // Shared stub locations | |
| 201 static address get_poll_stub(address pc); | |
| 202 | |
| 203 static address get_ic_miss_stub() { | |
| 204 assert(_ic_miss_blob!= NULL, "oops"); | |
| 1748 | 205 return _ic_miss_blob->entry_point(); |
| 0 | 206 } |
| 207 | |
| 208 static address get_handle_wrong_method_stub() { | |
| 209 assert(_wrong_method_blob!= NULL, "oops"); | |
| 1748 | 210 return _wrong_method_blob->entry_point(); |
| 0 | 211 } |
| 212 | |
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213 static address get_handle_wrong_method_abstract_stub() { |
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214 assert(_wrong_method_abstract_blob!= NULL, "oops"); |
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215 return _wrong_method_abstract_blob->entry_point(); |
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216 } |
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217 |
| 0 | 218 #ifdef COMPILER2 |
| 219 static void generate_uncommon_trap_blob(void); | |
| 220 static UncommonTrapBlob* uncommon_trap_blob() { return _uncommon_trap_blob; } | |
| 221 #endif // COMPILER2 | |
| 222 | |
| 223 static address get_resolve_opt_virtual_call_stub(){ | |
| 224 assert(_resolve_opt_virtual_call_blob != NULL, "oops"); | |
| 1748 | 225 return _resolve_opt_virtual_call_blob->entry_point(); |
| 0 | 226 } |
| 227 static address get_resolve_virtual_call_stub() { | |
| 228 assert(_resolve_virtual_call_blob != NULL, "oops"); | |
| 1748 | 229 return _resolve_virtual_call_blob->entry_point(); |
| 0 | 230 } |
| 231 static address get_resolve_static_call_stub() { | |
| 232 assert(_resolve_static_call_blob != NULL, "oops"); | |
| 1748 | 233 return _resolve_static_call_blob->entry_point(); |
| 0 | 234 } |
| 235 | |
| 236 static SafepointBlob* polling_page_return_handler_blob() { return _polling_page_return_handler_blob; } | |
| 237 static SafepointBlob* polling_page_safepoint_handler_blob() { return _polling_page_safepoint_handler_blob; } | |
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238 static SafepointBlob* polling_page_vectors_safepoint_handler_blob() { return _polling_page_vectors_safepoint_handler_blob; } |
| 0 | 239 |
| 240 // Counters | |
| 241 #ifndef PRODUCT | |
| 242 static address nof_megamorphic_calls_addr() { return (address)&_nof_megamorphic_calls; } | |
| 243 #endif // PRODUCT | |
| 244 | |
| 245 // Helper routine for full-speed JVMTI exception throwing support | |
| 246 static void throw_and_post_jvmti_exception(JavaThread *thread, Handle h_exception); | |
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247 static void throw_and_post_jvmti_exception(JavaThread *thread, Symbol* name, const char *message = NULL); |
| 0 | 248 |
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249 // RedefineClasses() tracing support for obsolete method entry |
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250 static int rc_trace_method_entry(JavaThread* thread, Method* m); |
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251 |
| 0 | 252 // To be used as the entry point for unresolved native methods. |
| 253 static address native_method_throw_unsatisfied_link_error_entry(); | |
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254 static address native_method_throw_unsupported_operation_exception_entry(); |
| 0 | 255 |
| 256 // bytecode tracing is only used by the TraceBytecodes | |
| 257 static intptr_t trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2) PRODUCT_RETURN0; | |
| 258 | |
| 259 // Used to back off a spin lock that is under heavy contention | |
| 260 static void yield_all(JavaThread* thread, int attempts = 0); | |
| 261 | |
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262 static oop retrieve_receiver( Symbol* sig, frame caller ); |
| 0 | 263 |
| 264 static void register_finalizer(JavaThread* thread, oopDesc* obj); | |
| 265 | |
| 266 // dtrace notifications | |
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267 static int dtrace_object_alloc(oopDesc* o, int size); |
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268 static int dtrace_object_alloc_base(Thread* thread, oopDesc* o, int size); |
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269 static int dtrace_method_entry(JavaThread* thread, Method* m); |
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270 static int dtrace_method_exit(JavaThread* thread, Method* m); |
| 0 | 271 |
| 272 // Utility method for retrieving the Java thread id, returns 0 if the | |
| 273 // thread is not a well formed Java thread. | |
| 274 static jlong get_java_tid(Thread* thread); | |
| 275 | |
| 276 | |
| 277 // used by native wrappers to reenable yellow if overflow happened in native code | |
| 278 static void reguard_yellow_pages(); | |
| 279 | |
| 280 /** | |
| 281 * Fill in the "X cannot be cast to a Y" message for ClassCastException | |
| 282 * | |
| 283 * @param thr the current thread | |
| 284 * @param name the name of the class of the object attempted to be cast | |
| 285 * @return the dynamically allocated exception message (must be freed | |
| 286 * by the caller using a resource mark) | |
| 287 * | |
| 288 * BCP must refer to the current 'checkcast' opcode for the frame | |
| 289 * on top of the stack. | |
| 290 * The caller (or one of it's callers) must use a ResourceMark | |
| 291 * in order to correctly free the result. | |
| 292 */ | |
| 293 static char* generate_class_cast_message(JavaThread* thr, const char* name); | |
| 294 | |
| 295 /** | |
| 296 * Fill in the "X cannot be cast to a Y" message for ClassCastException | |
| 297 * | |
| 298 * @param name the name of the class of the object attempted to be cast | |
| 299 * @param klass the name of the target klass attempt | |
| 710 | 300 * @param gripe the specific kind of problem being reported |
| 0 | 301 * @return the dynamically allocated exception message (must be freed |
| 302 * by the caller using a resource mark) | |
| 303 * | |
| 304 * This version does not require access the frame, so it can be called | |
| 305 * from interpreted code | |
| 306 * The caller (or one of it's callers) must use a ResourceMark | |
| 307 * in order to correctly free the result. | |
| 308 */ | |
| 710 | 309 static char* generate_class_cast_message(const char* name, const char* klass, |
| 310 const char* gripe = " cannot be cast to "); | |
| 0 | 311 |
| 312 // Resolves a call site- may patch in the destination of the call into the | |
| 313 // compiled code. | |
| 314 static methodHandle resolve_helper(JavaThread *thread, | |
| 315 bool is_virtual, | |
| 316 bool is_optimized, TRAPS); | |
| 317 | |
| 318 private: | |
| 319 // deopt blob | |
| 320 static void generate_deopt_blob(void); | |
| 321 | |
| 322 public: | |
| 323 static DeoptimizationBlob* deopt_blob(void) { return _deopt_blob; } | |
| 324 | |
| 325 // Resets a call-site in compiled code so it will get resolved again. | |
| 326 static methodHandle reresolve_call_site(JavaThread *thread, TRAPS); | |
| 327 | |
| 328 // In the code prolog, if the klass comparison fails, the inline cache | |
| 329 // misses and the call site is patched to megamorphic | |
| 330 static methodHandle handle_ic_miss_helper(JavaThread* thread, TRAPS); | |
| 331 | |
| 332 // Find the method that called us. | |
| 333 static methodHandle find_callee_method(JavaThread* thread, TRAPS); | |
| 334 | |
| 335 | |
| 336 private: | |
| 337 static Handle find_callee_info(JavaThread* thread, | |
| 338 Bytecodes::Code& bc, | |
| 339 CallInfo& callinfo, TRAPS); | |
| 340 static Handle find_callee_info_helper(JavaThread* thread, | |
| 341 vframeStream& vfst, | |
| 342 Bytecodes::Code& bc, | |
| 343 CallInfo& callinfo, TRAPS); | |
| 344 | |
| 345 static address clean_virtual_call_entry(); | |
| 346 static address clean_opt_virtual_call_entry(); | |
| 347 static address clean_static_call_entry(); | |
| 348 | |
| 349 public: | |
| 350 | |
| 351 // Read the array of BasicTypes from a Java signature, and compute where | |
| 352 // compiled Java code would like to put the results. Values in reg_lo and | |
| 353 // reg_hi refer to 4-byte quantities. Values less than SharedInfo::stack0 are | |
| 354 // registers, those above refer to 4-byte stack slots. All stack slots are | |
| 355 // based off of the window top. SharedInfo::stack0 refers to the first usable | |
| 356 // slot in the bottom of the frame. SharedInfo::stack0+1 refers to the memory word | |
| 357 // 4-bytes higher. So for sparc because the register window save area is at | |
| 358 // the bottom of the frame the first 16 words will be skipped and SharedInfo::stack0 | |
| 359 // will be just above it. ( | |
| 360 // return value is the maximum number of VMReg stack slots the convention will use. | |
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361 static int java_calling_convention(const BasicType* sig_bt, VMRegPair* regs, int total_args_passed, int is_outgoing); |
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362 |
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363 static void check_member_name_argument_is_last_argument(methodHandle method, |
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364 const BasicType* sig_bt, |
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365 const VMRegPair* regs) NOT_DEBUG_RETURN; |
| 0 | 366 |
| 367 // Ditto except for calling C | |
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368 // |
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369 // C argument in register AND stack slot. |
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370 // Some architectures require that an argument must be passed in a register |
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371 // AND in a stack slot. These architectures provide a second VMRegPair array |
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372 // to be filled by the c_calling_convention method. On other architectures, |
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373 // NULL is being passed as the second VMRegPair array, so arguments are either |
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374 // passed in a register OR in a stack slot. |
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375 static int c_calling_convention(const BasicType *sig_bt, VMRegPair *regs, VMRegPair *regs2, |
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376 int total_args_passed); |
| 0 | 377 |
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378 // Compute the new number of arguments in the signature if 32 bit ints |
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379 // must be converted to longs. Needed if CCallingConventionRequiresIntsAsLongs |
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380 // is true. |
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381 static int convert_ints_to_longints_argcnt(int in_args_count, BasicType* in_sig_bt); |
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382 // Adapt a method's signature if it contains 32 bit integers that must |
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383 // be converted to longs. Needed if CCallingConventionRequiresIntsAsLongs |
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384 // is true. |
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385 static void convert_ints_to_longints(int i2l_argcnt, int& in_args_count, |
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386 BasicType*& in_sig_bt, VMRegPair*& in_regs); |
| 0 | 387 |
| 388 // Generate I2C and C2I adapters. These adapters are simple argument marshalling | |
| 389 // blobs. Unlike adapters in the tiger and earlier releases the code in these | |
| 390 // blobs does not create a new frame and are therefore virtually invisible | |
| 391 // to the stack walking code. In general these blobs extend the callers stack | |
| 392 // as needed for the conversion of argument locations. | |
| 393 | |
| 394 // When calling a c2i blob the code will always call the interpreter even if | |
| 395 // by the time we reach the blob there is compiled code available. This allows | |
| 396 // the blob to pass the incoming stack pointer (the sender sp) in a known | |
| 397 // location for the interpreter to record. This is used by the frame code | |
| 398 // to correct the sender code to match up with the stack pointer when the | |
| 399 // thread left the compiled code. In addition it allows the interpreter | |
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400 // to remove the space the c2i adapter allocated to do its argument conversion. |
| 0 | 401 |
| 402 // Although a c2i blob will always run interpreted even if compiled code is | |
| 403 // present if we see that compiled code is present the compiled call site | |
| 404 // will be patched/re-resolved so that later calls will run compiled. | |
| 405 | |
| 406 // Aditionally a c2i blob need to have a unverified entry because it can be reached | |
| 407 // in situations where the call site is an inlined cache site and may go megamorphic. | |
| 408 | |
| 409 // A i2c adapter is simpler than the c2i adapter. This is because it is assumed | |
| 410 // that the interpreter before it does any call dispatch will record the current | |
| 411 // stack pointer in the interpreter frame. On return it will restore the stack | |
| 412 // pointer as needed. This means the i2c adapter code doesn't need any special | |
| 413 // handshaking path with compiled code to keep the stack walking correct. | |
| 414 | |
| 415 static AdapterHandlerEntry* generate_i2c2i_adapters(MacroAssembler *_masm, | |
| 416 int total_args_passed, | |
| 417 int max_arg, | |
| 418 const BasicType *sig_bt, | |
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419 const VMRegPair *regs, |
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420 AdapterFingerPrint* fingerprint); |
| 0 | 421 |
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422 static void gen_i2c_adapter(MacroAssembler *_masm, |
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423 int total_args_passed, |
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424 int comp_args_on_stack, |
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425 const BasicType *sig_bt, |
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426 const VMRegPair *regs, |
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427 int frame_extension_argument = -1); |
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428 |
| 0 | 429 // OSR support |
| 430 | |
| 431 // OSR_migration_begin will extract the jvm state from an interpreter | |
| 432 // frame (locals, monitors) and store the data in a piece of C heap | |
| 433 // storage. This then allows the interpreter frame to be removed from the | |
| 434 // stack and the OSR nmethod to be called. That method is called with a | |
| 435 // pointer to the C heap storage. This pointer is the return value from | |
| 436 // OSR_migration_begin. | |
| 437 | |
| 438 static intptr_t* OSR_migration_begin( JavaThread *thread); | |
| 439 | |
| 440 // OSR_migration_end is a trivial routine. It is called after the compiled | |
| 441 // method has extracted the jvm state from the C heap that OSR_migration_begin | |
| 442 // created. It's entire job is to simply free this storage. | |
| 443 static void OSR_migration_end ( intptr_t* buf); | |
| 444 | |
| 445 // Convert a sig into a calling convention register layout | |
| 446 // and find interesting things about it. | |
| 10390 | 447 static VMRegPair* find_callee_arguments(Symbol* sig, bool has_receiver, bool has_appendix, int *arg_size); |
| 0 | 448 static VMReg name_for_receiver(); |
| 449 | |
| 450 // "Top of Stack" slots that may be unused by the calling convention but must | |
| 451 // otherwise be preserved. | |
| 452 // On Intel these are not necessary and the value can be zero. | |
| 453 // On Sparc this describes the words reserved for storing a register window | |
| 454 // when an interrupt occurs. | |
| 455 static uint out_preserve_stack_slots(); | |
| 456 | |
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457 // Is vector's size (in bytes) bigger than a size saved by default? |
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458 // For example, on x86 16 bytes XMM registers are saved by default. |
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459 static bool is_wide_vector(int size); |
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460 |
| 0 | 461 // Save and restore a native result |
| 462 static void save_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots ); | |
| 463 static void restore_native_result(MacroAssembler *_masm, BasicType ret_type, int frame_slots ); | |
| 464 | |
| 465 // Generate a native wrapper for a given method. The method takes arguments | |
| 466 // in the Java compiled code convention, marshals them to the native | |
| 467 // convention (handlizes oops, etc), transitions to native, makes the call, | |
| 468 // returns to java state (possibly blocking), unhandlizes any result and | |
| 469 // returns. | |
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470 // |
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471 // The wrapper may contain special-case code if the given method |
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472 // is a JNI critical method, or a compiled method handle adapter, |
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473 // such as _invokeBasic, _linkToVirtual, etc. |
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474 static nmethod* generate_native_wrapper(MacroAssembler* masm, |
| 0 | 475 methodHandle method, |
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476 int compile_id, |
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477 BasicType* sig_bt, |
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478 VMRegPair* regs, |
| 0 | 479 BasicType ret_type ); |
| 480 | |
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481 // Block before entering a JNI critical method |
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482 static void block_for_jni_critical(JavaThread* thread); |
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483 |
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484 #ifdef HAVE_DTRACE_H |
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485 // Generate a dtrace wrapper for a given method. The method takes arguments |
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486 // in the Java compiled code convention, marshals them to the native |
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487 // convention (handlizes oops, etc), transitions to native, makes the call, |
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488 // returns to java state (possibly blocking), unhandlizes any result and |
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489 // returns. |
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490 static nmethod *generate_dtrace_nmethod(MacroAssembler* masm, |
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491 methodHandle method); |
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492 |
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493 // dtrace support to convert a Java string to utf8 |
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494 static void get_utf(oopDesc* src, address dst); |
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495 #endif // def HAVE_DTRACE_H |
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496 |
| 0 | 497 // A compiled caller has just called the interpreter, but compiled code |
| 498 // exists. Patch the caller so he no longer calls into the interpreter. | |
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499 static void fixup_callers_callsite(Method* moop, address ret_pc); |
| 0 | 500 |
| 501 // Slow-path Locking and Unlocking | |
| 502 static void complete_monitor_locking_C(oopDesc* obj, BasicLock* lock, JavaThread* thread); | |
| 503 static void complete_monitor_unlocking_C(oopDesc* obj, BasicLock* lock); | |
| 504 | |
| 505 // Resolving of calls | |
| 506 static address resolve_static_call_C (JavaThread *thread); | |
| 507 static address resolve_virtual_call_C (JavaThread *thread); | |
| 508 static address resolve_opt_virtual_call_C(JavaThread *thread); | |
| 509 | |
| 510 // arraycopy, the non-leaf version. (See StubRoutines for all the leaf calls.) | |
| 511 static void slow_arraycopy_C(oopDesc* src, jint src_pos, | |
| 512 oopDesc* dest, jint dest_pos, | |
| 513 jint length, JavaThread* thread); | |
| 514 | |
| 515 // handle ic miss with caller being compiled code | |
| 516 // wrong method handling (inline cache misses, zombie methods) | |
| 517 static address handle_wrong_method(JavaThread* thread); | |
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518 static address handle_wrong_method_abstract(JavaThread* thread); |
| 0 | 519 static address handle_wrong_method_ic_miss(JavaThread* thread); |
| 520 | |
| 521 #ifndef PRODUCT | |
| 522 | |
| 523 // Collect and print inline cache miss statistics | |
| 524 private: | |
| 525 enum { maxICmiss_count = 100 }; | |
| 526 static int _ICmiss_index; // length of IC miss histogram | |
| 527 static int _ICmiss_count[maxICmiss_count]; // miss counts | |
| 528 static address _ICmiss_at[maxICmiss_count]; // miss addresses | |
| 529 static void trace_ic_miss(address at); | |
| 530 | |
| 531 public: | |
| 532 static int _monitor_enter_ctr; // monitor enter slow | |
| 533 static int _monitor_exit_ctr; // monitor exit slow | |
| 534 static int _throw_null_ctr; // throwing a null-pointer exception | |
| 535 static int _ic_miss_ctr; // total # of IC misses | |
| 536 static int _wrong_method_ctr; | |
| 537 static int _resolve_static_ctr; | |
| 538 static int _resolve_virtual_ctr; | |
| 539 static int _resolve_opt_virtual_ctr; | |
| 540 static int _implicit_null_throws; | |
| 541 static int _implicit_div0_throws; | |
| 542 | |
| 543 static int _jbyte_array_copy_ctr; // Slow-path byte array copy | |
| 544 static int _jshort_array_copy_ctr; // Slow-path short array copy | |
| 545 static int _jint_array_copy_ctr; // Slow-path int array copy | |
| 546 static int _jlong_array_copy_ctr; // Slow-path long array copy | |
| 547 static int _oop_array_copy_ctr; // Slow-path oop array copy | |
| 548 static int _checkcast_array_copy_ctr; // Slow-path oop array copy, with cast | |
| 549 static int _unsafe_array_copy_ctr; // Slow-path includes alignment checks | |
| 550 static int _generic_array_copy_ctr; // Slow-path includes type decoding | |
| 551 static int _slow_array_copy_ctr; // Slow-path failed out to a method call | |
| 552 | |
| 553 static int _new_instance_ctr; // 'new' object requires GC | |
| 554 static int _new_array_ctr; // 'new' array requires GC | |
| 555 static int _multi1_ctr, _multi2_ctr, _multi3_ctr, _multi4_ctr, _multi5_ctr; | |
| 556 static int _find_handler_ctr; // find exception handler | |
| 557 static int _rethrow_ctr; // rethrow exception | |
| 558 static int _mon_enter_stub_ctr; // monitor enter stub | |
| 559 static int _mon_exit_stub_ctr; // monitor exit stub | |
| 560 static int _mon_enter_ctr; // monitor enter slow | |
| 561 static int _mon_exit_ctr; // monitor exit slow | |
| 562 static int _partial_subtype_ctr; // SubRoutines::partial_subtype_check | |
| 563 | |
| 564 // Statistics code | |
| 565 // stats for "normal" compiled calls (non-interface) | |
| 566 static int _nof_normal_calls; // total # of calls | |
| 567 static int _nof_optimized_calls; // total # of statically-bound calls | |
| 568 static int _nof_inlined_calls; // total # of inlined normal calls | |
| 569 static int _nof_static_calls; // total # of calls to static methods or super methods (invokespecial) | |
| 570 static int _nof_inlined_static_calls; // total # of inlined static calls | |
| 571 // stats for compiled interface calls | |
| 572 static int _nof_interface_calls; // total # of compiled calls | |
| 573 static int _nof_optimized_interface_calls; // total # of statically-bound interface calls | |
| 574 static int _nof_inlined_interface_calls; // total # of inlined interface calls | |
| 575 static int _nof_megamorphic_interface_calls;// total # of megamorphic interface calls | |
| 576 // stats for runtime exceptions | |
| 577 static int _nof_removable_exceptions; // total # of exceptions that could be replaced by branches due to inlining | |
| 578 | |
| 579 public: // for compiler | |
| 580 static address nof_normal_calls_addr() { return (address)&_nof_normal_calls; } | |
| 581 static address nof_optimized_calls_addr() { return (address)&_nof_optimized_calls; } | |
| 582 static address nof_inlined_calls_addr() { return (address)&_nof_inlined_calls; } | |
| 583 static address nof_static_calls_addr() { return (address)&_nof_static_calls; } | |
| 584 static address nof_inlined_static_calls_addr() { return (address)&_nof_inlined_static_calls; } | |
| 585 static address nof_interface_calls_addr() { return (address)&_nof_interface_calls; } | |
| 586 static address nof_optimized_interface_calls_addr() { return (address)&_nof_optimized_interface_calls; } | |
| 587 static address nof_inlined_interface_calls_addr() { return (address)&_nof_inlined_interface_calls; } | |
| 588 static address nof_megamorphic_interface_calls_addr() { return (address)&_nof_megamorphic_interface_calls; } | |
| 589 static void print_call_statistics(int comp_total); | |
| 590 static void print_statistics(); | |
| 591 static void print_ic_miss_histogram(); | |
| 592 | |
| 593 #endif // PRODUCT | |
| 594 }; | |
| 595 | |
| 596 | |
| 597 // --------------------------------------------------------------------------- | |
| 598 // Implementation of AdapterHandlerLibrary | |
| 599 // | |
| 600 // This library manages argument marshaling adapters and native wrappers. | |
| 601 // There are 2 flavors of adapters: I2C and C2I. | |
| 602 // | |
| 1748 | 603 // The I2C flavor takes a stock interpreted call setup, marshals the |
| 604 // arguments for a Java-compiled call, and jumps to Rmethod-> code()-> | |
| 605 // code_begin(). It is broken to call it without an nmethod assigned. | |
| 606 // The usual behavior is to lift any register arguments up out of the | |
| 607 // stack and possibly re-pack the extra arguments to be contigious. | |
| 608 // I2C adapters will save what the interpreter's stack pointer will be | |
| 609 // after arguments are popped, then adjust the interpreter's frame | |
| 610 // size to force alignment and possibly to repack the arguments. | |
| 611 // After re-packing, it jumps to the compiled code start. There are | |
| 612 // no safepoints in this adapter code and a GC cannot happen while | |
| 613 // marshaling is in progress. | |
| 0 | 614 // |
| 615 // The C2I flavor takes a stock compiled call setup plus the target method in | |
| 616 // Rmethod, marshals the arguments for an interpreted call and jumps to | |
| 617 // Rmethod->_i2i_entry. On entry, the interpreted frame has not yet been | |
| 618 // setup. Compiled frames are fixed-size and the args are likely not in the | |
| 619 // right place. Hence all the args will likely be copied into the | |
| 620 // interpreter's frame, forcing that frame to grow. The compiled frame's | |
| 621 // outgoing stack args will be dead after the copy. | |
| 622 // | |
| 623 // Native wrappers, like adapters, marshal arguments. Unlike adapters they | |
| 624 // also perform an offical frame push & pop. They have a call to the native | |
| 625 // routine in their middles and end in a return (instead of ending in a jump). | |
| 626 // The native wrappers are stored in real nmethods instead of the BufferBlobs | |
| 627 // used by the adapters. The code generation happens here because it's very | |
| 628 // similar to what the adapters have to do. | |
| 629 | |
| 6197 | 630 class AdapterHandlerEntry : public BasicHashtableEntry<mtCode> { |
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631 friend class AdapterHandlerTable; |
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632 |
| 0 | 633 private: |
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634 AdapterFingerPrint* _fingerprint; |
| 0 | 635 address _i2c_entry; |
| 636 address _c2i_entry; | |
| 637 address _c2i_unverified_entry; | |
| 638 | |
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639 #ifdef ASSERT |
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640 // Captures code and signature used to generate this adapter when |
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641 // verifing adapter equivalence. |
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642 unsigned char* _saved_code; |
| 17611 | 643 int _saved_code_length; |
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644 #endif |
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645 |
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646 void init(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry, address c2i_unverified_entry) { |
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647 _fingerprint = fingerprint; |
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648 _i2c_entry = i2c_entry; |
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649 _c2i_entry = c2i_entry; |
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650 _c2i_unverified_entry = c2i_unverified_entry; |
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651 #ifdef ASSERT |
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652 _saved_code = NULL; |
| 17611 | 653 _saved_code_length = 0; |
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654 #endif |
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655 } |
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656 |
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657 void deallocate(); |
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658 |
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659 // should never be used |
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660 AdapterHandlerEntry(); |
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661 |
| 0 | 662 public: |
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663 address get_i2c_entry() const { return _i2c_entry; } |
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664 address get_c2i_entry() const { return _c2i_entry; } |
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665 address get_c2i_unverified_entry() const { return _c2i_unverified_entry; } |
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666 address base_address(); |
| 0 | 667 void relocate(address new_base); |
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668 |
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669 AdapterFingerPrint* fingerprint() const { return _fingerprint; } |
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670 |
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671 AdapterHandlerEntry* next() { |
| 6197 | 672 return (AdapterHandlerEntry*)BasicHashtableEntry<mtCode>::next(); |
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673 } |
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674 |
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675 #ifdef ASSERT |
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676 // Used to verify that code generated for shared adapters is equivalent |
| 17611 | 677 void save_code (unsigned char* code, int length); |
| 678 bool compare_code(unsigned char* code, int length); | |
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679 #endif |
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680 |
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681 //virtual void print_on(outputStream* st) const; DO NOT USE |
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682 void print_adapter_on(outputStream* st) const; |
| 0 | 683 }; |
| 684 | |
| 685 class AdapterHandlerLibrary: public AllStatic { | |
| 686 private: | |
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687 static BufferBlob* _buffer; // the temporary code buffer in CodeCache |
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688 static AdapterHandlerTable* _adapters; |
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689 static AdapterHandlerEntry* _abstract_method_handler; |
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690 static BufferBlob* buffer_blob(); |
| 0 | 691 static void initialize(); |
| 692 | |
| 693 public: | |
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694 |
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695 static AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint, |
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696 address i2c_entry, address c2i_entry, address c2i_unverified_entry); |
| 17625 | 697 static void create_native_wrapper(methodHandle method); |
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698 static AdapterHandlerEntry* get_adapter(methodHandle method); |
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699 |
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700 #ifdef HAVE_DTRACE_H |
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701 static nmethod* create_dtrace_nmethod (methodHandle method); |
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702 #endif // HAVE_DTRACE_H |
| 0 | 703 |
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704 static void print_handler(CodeBlob* b) { print_handler_on(tty, b); } |
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705 static void print_handler_on(outputStream* st, CodeBlob* b); |
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706 static bool contains(CodeBlob* b); |
| 0 | 707 #ifndef PRODUCT |
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708 static void print_statistics(); |
| 0 | 709 #endif /* PRODUCT */ |
| 710 | |
| 711 }; | |
| 1972 | 712 |
| 713 #endif // SHARE_VM_RUNTIME_SHAREDRUNTIME_HPP |