Mercurial > hg > truffle
annotate src/share/vm/utilities/exceptions.cpp @ 4970:33df1aeaebbf
Merge with http://hg.openjdk.java.net/hsx/hsx24/hotspot/
| author | Thomas Wuerthinger <thomas.wuerthinger@oracle.com> |
|---|---|
| date | Mon, 27 Feb 2012 13:10:13 +0100 |
| parents | 716a2c5c0656 aa3d708d67c4 |
| children | 99d3d8a72252 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1998, 2012, 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 #include "precompiled.hpp" |
| 26 #include "classfile/systemDictionary.hpp" | |
| 27 #include "classfile/vmSymbols.hpp" | |
| 28 #include "compiler/compileBroker.hpp" | |
| 29 #include "oops/oop.inline.hpp" | |
| 30 #include "runtime/init.hpp" | |
| 31 #include "runtime/java.hpp" | |
| 32 #include "runtime/javaCalls.hpp" | |
| 33 #include "runtime/threadCritical.hpp" | |
| 34 #include "utilities/events.hpp" | |
| 35 #include "utilities/exceptions.hpp" | |
| 36 #ifdef TARGET_OS_FAMILY_linux | |
| 37 # include "thread_linux.inline.hpp" | |
| 38 #endif | |
| 39 #ifdef TARGET_OS_FAMILY_solaris | |
| 40 # include "thread_solaris.inline.hpp" | |
| 41 #endif | |
| 42 #ifdef TARGET_OS_FAMILY_windows | |
| 43 # include "thread_windows.inline.hpp" | |
| 44 #endif | |
| 3960 | 45 #ifdef TARGET_OS_FAMILY_bsd |
| 46 # include "thread_bsd.inline.hpp" | |
| 47 #endif | |
| 0 | 48 |
| 49 | |
| 50 // Implementation of ThreadShadow | |
| 51 void check_ThreadShadow() { | |
| 52 const ByteSize offset1 = byte_offset_of(ThreadShadow, _pending_exception); | |
| 53 const ByteSize offset2 = Thread::pending_exception_offset(); | |
| 54 if (offset1 != offset2) fatal("ThreadShadow::_pending_exception is not positioned correctly"); | |
| 55 } | |
| 56 | |
| 57 | |
| 58 void ThreadShadow::set_pending_exception(oop exception, const char* file, int line) { | |
| 59 assert(exception != NULL && exception->is_oop(), "invalid exception oop"); | |
| 60 _pending_exception = exception; | |
| 61 _exception_file = file; | |
| 62 _exception_line = line; | |
| 63 } | |
| 64 | |
| 65 void ThreadShadow::clear_pending_exception() { | |
| 66 if (TraceClearedExceptions) { | |
| 67 if (_pending_exception != NULL) { | |
| 68 tty->print_cr("Thread::clear_pending_exception: cleared exception:"); | |
| 69 _pending_exception->print(); | |
| 70 } | |
| 71 } | |
| 72 _pending_exception = NULL; | |
| 73 _exception_file = NULL; | |
| 74 _exception_line = 0; | |
| 75 } | |
| 76 // Implementation of Exceptions | |
| 77 | |
| 78 bool Exceptions::special_exception(Thread* thread, const char* file, int line, Handle h_exception) { | |
| 79 // bootstrapping check | |
| 80 if (!Universe::is_fully_initialized()) { | |
| 81 vm_exit_during_initialization(h_exception); | |
| 82 ShouldNotReachHere(); | |
| 83 } | |
| 84 | |
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85 #ifdef ASSERT |
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86 // Check for trying to throw stack overflow before initialization is complete |
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87 // to prevent infinite recursion trying to initialize stack overflow without |
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88 // adequate stack space. |
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89 // This can happen with stress testing a large value of StackShadowPages |
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90 if (h_exception()->klass() == SystemDictionary::StackOverflowError_klass()) { |
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91 instanceKlass* ik = instanceKlass::cast(h_exception->klass()); |
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92 assert(ik->is_initialized(), |
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93 "need to increase min_stack_allowed calculation"); |
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94 } |
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95 #endif // ASSERT |
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96 |
| 0 | 97 if (thread->is_VM_thread() |
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98 // TODO(tw): May we do this? |
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99 /*|| thread->is_Compiler_thread()*/ ) { |
| 0 | 100 // We do not care what kind of exception we get for the vm-thread or a thread which |
| 101 // is compiling. We just install a dummy exception object | |
| 102 thread->set_pending_exception(Universe::vm_exception(), file, line); | |
| 103 return true; | |
| 104 } | |
| 105 | |
| 106 return false; | |
| 107 } | |
| 108 | |
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109 bool Exceptions::special_exception(Thread* thread, const char* file, int line, Symbol* h_name, const char* message) { |
| 0 | 110 // bootstrapping check |
| 111 if (!Universe::is_fully_initialized()) { | |
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112 if (h_name == NULL) { |
| 0 | 113 // atleast an informative message. |
| 114 vm_exit_during_initialization("Exception", message); | |
| 115 } else { | |
| 116 vm_exit_during_initialization(h_name, message); | |
| 117 } | |
| 118 ShouldNotReachHere(); | |
| 119 } | |
| 120 | |
| 121 if (thread->is_VM_thread() | |
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122 // TODO(tw): May we do this? |
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123 /* || thread->is_Compiler_thread()*/ ) { |
| 0 | 124 // We do not care what kind of exception we get for the vm-thread or a thread which |
| 125 // is compiling. We just install a dummy exception object | |
| 126 thread->set_pending_exception(Universe::vm_exception(), file, line); | |
| 127 return true; | |
| 128 } | |
| 129 return false; | |
| 130 } | |
| 131 | |
| 132 // This method should only be called from generated code, | |
| 133 // therefore the exception oop should be in the oopmap. | |
| 134 void Exceptions::_throw_oop(Thread* thread, const char* file, int line, oop exception) { | |
| 135 assert(exception != NULL, "exception should not be NULL"); | |
| 136 Handle h_exception = Handle(thread, exception); | |
| 137 _throw(thread, file, line, h_exception); | |
| 138 } | |
| 139 | |
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140 void Exceptions::_throw(Thread* thread, const char* file, int line, Handle h_exception, const char* message) { |
| 0 | 141 assert(h_exception() != NULL, "exception should not be NULL"); |
| 142 | |
| 143 // tracing (do this up front - so it works during boot strapping) | |
| 144 if (TraceExceptions) { | |
| 145 ttyLocker ttyl; | |
| 146 ResourceMark rm; | |
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147 tty->print_cr("Exception <%s>%s%s (" INTPTR_FORMAT " ) \n" |
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148 "thrown [%s, line %d]\nfor thread " INTPTR_FORMAT, |
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149 h_exception->print_value_string(), |
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150 message ? ": " : "", message ? message : "", |
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151 (address)h_exception(), file, line, thread); |
| 0 | 152 } |
| 153 // for AbortVMOnException flag | |
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154 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception, message)); |
| 0 | 155 |
| 156 // Check for special boot-strapping/vm-thread handling | |
| 157 if (special_exception(thread, file, line, h_exception)) return; | |
| 158 | |
| 1142 | 159 assert(h_exception->is_a(SystemDictionary::Throwable_klass()), "exception is not a subclass of java/lang/Throwable"); |
| 0 | 160 |
| 161 // set the pending exception | |
| 162 thread->set_pending_exception(h_exception(), file, line); | |
| 163 | |
| 164 // vm log | |
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165 Events::log_exception(thread, "Threw " INTPTR_FORMAT " at %s:%d", (address)h_exception(), file, line); |
| 0 | 166 } |
| 167 | |
| 168 | |
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169 void Exceptions::_throw_msg(Thread* thread, const char* file, int line, Symbol* h_name, const char* message, Handle h_loader, Handle h_protection_domain) { |
| 0 | 170 // Check for special boot-strapping/vm-thread handling |
| 171 if (special_exception(thread, file, line, h_name, message)) return; | |
| 172 // Create and throw exception | |
| 173 Handle h_cause(thread, NULL); | |
| 174 Handle h_exception = new_exception(thread, h_name, message, h_cause, h_loader, h_protection_domain); | |
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175 _throw(thread, file, line, h_exception, message); |
| 0 | 176 } |
| 177 | |
| 178 // Throw an exception with a message and a cause | |
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179 void Exceptions::_throw_msg_cause(Thread* thread, const char* file, int line, Symbol* h_name, const char* message, Handle h_cause, Handle h_loader, Handle h_protection_domain) { |
| 0 | 180 // Check for special boot-strapping/vm-thread handling |
| 181 if (special_exception(thread, file, line, h_name, message)) return; | |
| 182 // Create and throw exception and init cause | |
| 183 Handle h_exception = new_exception(thread, h_name, message, h_cause, h_loader, h_protection_domain); | |
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184 _throw(thread, file, line, h_exception, message); |
| 0 | 185 } |
| 186 | |
| 187 // This version already has a handle for name | |
| 188 void Exceptions::_throw_msg(Thread* thread, const char* file, int line, | |
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189 Symbol* name, const char* message) { |
| 0 | 190 Handle h_loader(thread, NULL); |
| 191 Handle h_protection_domain(thread, NULL); | |
| 192 Exceptions::_throw_msg(thread, file, line, name, message, h_loader, h_protection_domain); | |
| 193 } | |
| 194 | |
| 195 // This version already has a handle for name | |
| 196 void Exceptions::_throw_msg_cause(Thread* thread, const char* file, int line, | |
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197 Symbol* name, const char* message, Handle cause) { |
| 0 | 198 Handle h_loader(thread, NULL); |
| 199 Handle h_protection_domain(thread, NULL); | |
| 200 Exceptions::_throw_msg_cause(thread, file, line, name, message, cause, h_loader, h_protection_domain); | |
| 201 } | |
| 202 | |
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203 void Exceptions::_throw_args(Thread* thread, const char* file, int line, Symbol* h_name, Symbol* h_signature, JavaCallArguments *args) { |
| 0 | 204 // Check for special boot-strapping/vm-thread handling |
| 205 if (special_exception(thread, file, line, h_name, NULL)) return; | |
| 206 // Create and throw exception | |
| 207 Handle h_loader(thread, NULL); | |
| 208 Handle h_prot(thread, NULL); | |
| 209 Handle h_cause(thread, NULL); | |
| 210 Handle exception = new_exception(thread, h_name, h_signature, args, h_cause, h_loader, h_prot); | |
| 211 _throw(thread, file, line, exception); | |
| 212 } | |
| 213 | |
| 214 | |
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215 void Exceptions::throw_stack_overflow_exception(Thread* THREAD, const char* file, int line, methodHandle method) { |
| 0 | 216 Handle exception; |
| 217 if (!THREAD->has_pending_exception()) { | |
| 218 klassOop k = SystemDictionary::StackOverflowError_klass(); | |
| 219 oop e = instanceKlass::cast(k)->allocate_instance(CHECK); | |
| 220 exception = Handle(THREAD, e); // fill_in_stack trace does gc | |
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221 assert(instanceKlass::cast(k)->is_initialized(), "need to increase min_stack_allowed calculation"); |
| 0 | 222 if (StackTraceInThrowable) { |
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223 java_lang_Throwable::fill_in_stack_trace(exception, method()); |
| 0 | 224 } |
| 225 } else { | |
| 226 // if prior exception, throw that one instead | |
| 227 exception = Handle(THREAD, THREAD->pending_exception()); | |
| 228 } | |
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229 _throw(THREAD, file, line, exception); |
| 0 | 230 } |
| 231 | |
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232 void Exceptions::fthrow(Thread* thread, const char* file, int line, Symbol* h_name, const char* format, ...) { |
| 0 | 233 const int max_msg_size = 1024; |
| 234 va_list ap; | |
| 235 va_start(ap, format); | |
| 236 char msg[max_msg_size]; | |
| 237 vsnprintf(msg, max_msg_size, format, ap); | |
| 238 msg[max_msg_size-1] = '\0'; | |
| 239 va_end(ap); | |
| 240 _throw_msg(thread, file, line, h_name, msg); | |
| 241 } | |
| 242 | |
| 243 // Creates an exception oop, calls the <init> method with the given signature. | |
| 244 // and returns a Handle | |
| 245 // Initializes the cause if cause non-null | |
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246 Handle Exceptions::new_exception(Thread *thread, Symbol* h_name, |
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247 Symbol* signature, |
| 0 | 248 JavaCallArguments *args, |
| 249 Handle h_cause, Handle h_loader, | |
| 250 Handle h_protection_domain) { | |
| 251 assert(Universe::is_fully_initialized(), | |
| 252 "cannot be called during initialization"); | |
| 253 assert(thread->is_Java_thread(), "can only be called by a Java thread"); | |
| 254 assert(!thread->has_pending_exception(), "already has exception"); | |
| 255 | |
| 256 Handle h_exception; | |
| 257 | |
| 258 // Resolve exception klass | |
| 259 klassOop ik = SystemDictionary::resolve_or_fail(h_name, h_loader, h_protection_domain, true, thread); | |
| 260 instanceKlassHandle klass (thread, ik); | |
| 261 | |
| 262 if (!thread->has_pending_exception()) { | |
| 263 assert(klass.not_null(), "klass must exist"); | |
| 264 // We are about to create an instance - so make sure that klass is initialized | |
| 265 klass->initialize(thread); | |
| 266 if (!thread->has_pending_exception()) { | |
| 267 // Allocate new exception | |
| 268 h_exception = klass->allocate_instance_handle(thread); | |
| 269 if (!thread->has_pending_exception()) { | |
| 270 JavaValue result(T_VOID); | |
| 271 args->set_receiver(h_exception); | |
| 272 // Call constructor | |
| 273 JavaCalls::call_special(&result, klass, | |
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274 vmSymbols::object_initializer_name(), |
| 0 | 275 signature, |
| 276 args, | |
| 277 thread); | |
| 278 | |
| 279 } | |
| 280 } | |
| 281 | |
| 282 // Future: object initializer should take a cause argument | |
| 283 if (h_cause() != NULL) { | |
| 1142 | 284 assert(h_cause->is_a(SystemDictionary::Throwable_klass()), |
| 0 | 285 "exception cause is not a subclass of java/lang/Throwable"); |
| 286 JavaValue result1(T_OBJECT); | |
| 287 JavaCallArguments args1; | |
| 288 args1.set_receiver(h_exception); | |
| 289 args1.push_oop(h_cause); | |
| 290 JavaCalls::call_virtual(&result1, klass, | |
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291 vmSymbols::initCause_name(), |
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292 vmSymbols::throwable_throwable_signature(), |
| 0 | 293 &args1, |
| 294 thread); | |
| 295 } | |
| 296 } | |
| 297 | |
| 298 // Check if another exception was thrown in the process, if so rethrow that one | |
| 299 if (thread->has_pending_exception()) { | |
| 300 h_exception = Handle(thread, thread->pending_exception()); | |
| 301 thread->clear_pending_exception(); | |
| 302 } | |
| 303 return h_exception; | |
| 304 } | |
| 305 | |
| 306 // Convenience method. Calls either the <init>() or <init>(String) method when | |
| 307 // creating a new exception | |
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308 Handle Exceptions::new_exception(Thread* thread, Symbol* h_name, |
| 0 | 309 const char* message, Handle h_cause, |
| 310 Handle h_loader, | |
| 311 Handle h_protection_domain, | |
| 312 ExceptionMsgToUtf8Mode to_utf8_safe) { | |
| 313 JavaCallArguments args; | |
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314 Symbol* signature = NULL; |
| 0 | 315 if (message == NULL) { |
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316 signature = vmSymbols::void_method_signature(); |
| 0 | 317 } else { |
| 318 // We want to allocate storage, but we can't do that if there's | |
| 319 // a pending exception, so we preserve any pending exception | |
| 320 // around the allocation. | |
| 321 // If we get an exception from the allocation, prefer that to | |
| 322 // the exception we are trying to build, or the pending exception. | |
| 323 // This is sort of like what PRESERVE_EXCEPTION_MARK does, except | |
| 324 // for the preferencing and the early returns. | |
| 325 Handle incoming_exception (thread, NULL); | |
| 326 if (thread->has_pending_exception()) { | |
| 327 incoming_exception = Handle(thread, thread->pending_exception()); | |
| 328 thread->clear_pending_exception(); | |
| 329 } | |
| 330 Handle msg; | |
| 331 if (to_utf8_safe == safe_to_utf8) { | |
| 332 // Make a java UTF8 string. | |
| 333 msg = java_lang_String::create_from_str(message, thread); | |
| 334 } else { | |
| 335 // Make a java string keeping the encoding scheme of the original string. | |
| 336 msg = java_lang_String::create_from_platform_dependent_str(message, thread); | |
| 337 } | |
| 338 if (thread->has_pending_exception()) { | |
| 339 Handle exception(thread, thread->pending_exception()); | |
| 340 thread->clear_pending_exception(); | |
| 341 return exception; | |
| 342 } | |
| 343 if (incoming_exception.not_null()) { | |
| 344 return incoming_exception; | |
| 345 } | |
| 346 args.push_oop(msg); | |
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347 signature = vmSymbols::string_void_signature(); |
| 0 | 348 } |
| 349 return new_exception(thread, h_name, signature, &args, h_cause, h_loader, h_protection_domain); | |
| 350 } | |
| 351 | |
| 352 // Another convenience method that creates handles for null class loaders and | |
| 353 // protection domains and null causes. | |
| 354 // If the last parameter 'to_utf8_mode' is safe_to_utf8, | |
| 355 // it means we can safely ignore the encoding scheme of the message string and | |
| 356 // convert it directly to a java UTF8 string. Otherwise, we need to take the | |
| 357 // encoding scheme of the string into account. One thing we should do at some | |
| 358 // point is to push this flag down to class java_lang_String since other | |
| 359 // classes may need similar functionalities. | |
| 360 Handle Exceptions::new_exception(Thread* thread, | |
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361 Symbol* name, |
| 0 | 362 const char* message, |
| 363 ExceptionMsgToUtf8Mode to_utf8_safe) { | |
| 364 | |
| 365 Handle h_loader(thread, NULL); | |
| 366 Handle h_prot(thread, NULL); | |
| 367 Handle h_cause(thread, NULL); | |
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368 return Exceptions::new_exception(thread, name, message, h_cause, h_loader, |
| 0 | 369 h_prot, to_utf8_safe); |
| 370 } | |
| 371 | |
| 372 // Implementation of ExceptionMark | |
| 373 | |
| 374 ExceptionMark::ExceptionMark(Thread*& thread) { | |
| 375 thread = Thread::current(); | |
| 376 _thread = thread; | |
| 377 if (_thread->has_pending_exception()) { | |
| 378 oop exception = _thread->pending_exception(); | |
| 379 _thread->clear_pending_exception(); // Needed to avoid infinite recursion | |
| 380 exception->print(); | |
| 381 fatal("ExceptionMark constructor expects no pending exceptions"); | |
| 382 } | |
| 383 } | |
| 384 | |
| 385 | |
| 386 ExceptionMark::~ExceptionMark() { | |
| 387 if (_thread->has_pending_exception()) { | |
| 388 Handle exception(_thread, _thread->pending_exception()); | |
| 389 _thread->clear_pending_exception(); // Needed to avoid infinite recursion | |
| 390 if (is_init_completed()) { | |
| 391 exception->print(); | |
| 392 fatal("ExceptionMark destructor expects no pending exceptions"); | |
| 393 } else { | |
| 394 vm_exit_during_initialization(exception); | |
| 395 } | |
| 396 } | |
| 397 } | |
| 398 | |
| 399 // ---------------------------------------------------------------------------------------- | |
| 400 | |
| 401 #ifndef PRODUCT | |
| 402 // caller frees value_string if necessary | |
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403 void Exceptions::debug_check_abort(const char *value_string, const char* message) { |
| 0 | 404 if (AbortVMOnException != NULL && value_string != NULL && |
| 405 strstr(value_string, AbortVMOnException)) { | |
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406 if (AbortVMOnExceptionMessage == NULL || message == NULL || |
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407 strcmp(message, AbortVMOnExceptionMessage) == 0) { |
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408 fatal(err_msg("Saw %s, aborting", value_string)); |
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409 } |
| 0 | 410 } |
| 411 } | |
| 412 | |
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413 void Exceptions::debug_check_abort(Handle exception, const char* message) { |
| 0 | 414 if (AbortVMOnException != NULL) { |
| 415 ResourceMark rm; | |
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416 if (message == NULL && exception->is_a(SystemDictionary::Throwable_klass())) { |
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417 oop msg = java_lang_Throwable::message(exception); |
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418 if (msg != NULL) { |
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419 message = java_lang_String::as_utf8_string(msg); |
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420 } |
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421 } |
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422 debug_check_abort(instanceKlass::cast(exception()->klass())->external_name(), message); |
| 0 | 423 } |
| 424 } | |
| 425 #endif |