Mercurial > hg > truffle
annotate src/share/vm/utilities/exceptions.cpp @ 5459:ecb598b9d535
add simple test for ControlFlowGraph block computation
author | Lukas Stadler <lukas.stadler@jku.at> |
---|---|
date | Thu, 31 May 2012 18:24:53 +0200 |
parents | 1b8d02e10ee8 |
children | 957c266d8bc5 |
rev | line source |
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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 || thread->is_Compiler_thread() ) { |
0 | 99 // We do not care what kind of exception we get for the vm-thread or a thread which |
100 // is compiling. We just install a dummy exception object | |
101 thread->set_pending_exception(Universe::vm_exception(), file, line); | |
102 return true; | |
103 } | |
104 | |
105 return false; | |
106 } | |
107 | |
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108 bool Exceptions::special_exception(Thread* thread, const char* file, int line, Symbol* h_name, const char* message) { |
0 | 109 // bootstrapping check |
110 if (!Universe::is_fully_initialized()) { | |
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111 if (h_name == NULL) { |
0 | 112 // atleast an informative message. |
113 vm_exit_during_initialization("Exception", message); | |
114 } else { | |
115 vm_exit_during_initialization(h_name, message); | |
116 } | |
117 ShouldNotReachHere(); | |
118 } | |
119 | |
120 if (thread->is_VM_thread() | |
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121 || thread->is_Compiler_thread() ) { |
0 | 122 // We do not care what kind of exception we get for the vm-thread or a thread which |
123 // is compiling. We just install a dummy exception object | |
124 thread->set_pending_exception(Universe::vm_exception(), file, line); | |
125 return true; | |
126 } | |
127 return false; | |
128 } | |
129 | |
130 // This method should only be called from generated code, | |
131 // therefore the exception oop should be in the oopmap. | |
132 void Exceptions::_throw_oop(Thread* thread, const char* file, int line, oop exception) { | |
133 assert(exception != NULL, "exception should not be NULL"); | |
134 Handle h_exception = Handle(thread, exception); | |
135 _throw(thread, file, line, h_exception); | |
136 } | |
137 | |
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138 void Exceptions::_throw(Thread* thread, const char* file, int line, Handle h_exception, const char* message) { |
0 | 139 assert(h_exception() != NULL, "exception should not be NULL"); |
140 | |
141 // tracing (do this up front - so it works during boot strapping) | |
142 if (TraceExceptions) { | |
143 ttyLocker ttyl; | |
144 ResourceMark rm; | |
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145 tty->print_cr("Exception <%s>%s%s (" INTPTR_FORMAT " ) \n" |
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146 "thrown [%s, line %d]\nfor thread " INTPTR_FORMAT, |
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147 h_exception->print_value_string(), |
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148 message ? ": " : "", message ? message : "", |
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149 (address)h_exception(), file, line, thread); |
0 | 150 } |
151 // for AbortVMOnException flag | |
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152 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception, message)); |
0 | 153 |
154 // Check for special boot-strapping/vm-thread handling | |
155 if (special_exception(thread, file, line, h_exception)) return; | |
156 | |
1142 | 157 assert(h_exception->is_a(SystemDictionary::Throwable_klass()), "exception is not a subclass of java/lang/Throwable"); |
0 | 158 |
159 // set the pending exception | |
160 thread->set_pending_exception(h_exception(), file, line); | |
161 | |
162 // vm log | |
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163 Events::log_exception(thread, "Threw " INTPTR_FORMAT " at %s:%d", (address)h_exception(), file, line); |
0 | 164 } |
165 | |
166 | |
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167 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 | 168 // Check for special boot-strapping/vm-thread handling |
169 if (special_exception(thread, file, line, h_name, message)) return; | |
170 // Create and throw exception | |
171 Handle h_cause(thread, NULL); | |
172 Handle h_exception = new_exception(thread, h_name, message, h_cause, h_loader, h_protection_domain); | |
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173 _throw(thread, file, line, h_exception, message); |
0 | 174 } |
175 | |
176 // Throw an exception with a message and a cause | |
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177 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 | 178 // Check for special boot-strapping/vm-thread handling |
179 if (special_exception(thread, file, line, h_name, message)) return; | |
180 // Create and throw exception and init cause | |
181 Handle h_exception = new_exception(thread, h_name, message, h_cause, h_loader, h_protection_domain); | |
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182 _throw(thread, file, line, h_exception, message); |
0 | 183 } |
184 | |
185 // This version already has a handle for name | |
186 void Exceptions::_throw_msg(Thread* thread, const char* file, int line, | |
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187 Symbol* name, const char* message) { |
0 | 188 Handle h_loader(thread, NULL); |
189 Handle h_protection_domain(thread, NULL); | |
190 Exceptions::_throw_msg(thread, file, line, name, message, h_loader, h_protection_domain); | |
191 } | |
192 | |
193 // This version already has a handle for name | |
194 void Exceptions::_throw_msg_cause(Thread* thread, const char* file, int line, | |
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195 Symbol* name, const char* message, Handle cause) { |
0 | 196 Handle h_loader(thread, NULL); |
197 Handle h_protection_domain(thread, NULL); | |
198 Exceptions::_throw_msg_cause(thread, file, line, name, message, cause, h_loader, h_protection_domain); | |
199 } | |
200 | |
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201 void Exceptions::_throw_args(Thread* thread, const char* file, int line, Symbol* h_name, Symbol* h_signature, JavaCallArguments *args) { |
0 | 202 // Check for special boot-strapping/vm-thread handling |
203 if (special_exception(thread, file, line, h_name, NULL)) return; | |
204 // Create and throw exception | |
205 Handle h_loader(thread, NULL); | |
206 Handle h_prot(thread, NULL); | |
207 Handle h_cause(thread, NULL); | |
208 Handle exception = new_exception(thread, h_name, h_signature, args, h_cause, h_loader, h_prot); | |
209 _throw(thread, file, line, exception); | |
210 } | |
211 | |
212 | |
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213 void Exceptions::throw_stack_overflow_exception(Thread* THREAD, const char* file, int line, methodHandle method) { |
0 | 214 Handle exception; |
215 if (!THREAD->has_pending_exception()) { | |
216 klassOop k = SystemDictionary::StackOverflowError_klass(); | |
217 oop e = instanceKlass::cast(k)->allocate_instance(CHECK); | |
218 exception = Handle(THREAD, e); // fill_in_stack trace does gc | |
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219 assert(instanceKlass::cast(k)->is_initialized(), "need to increase min_stack_allowed calculation"); |
0 | 220 if (StackTraceInThrowable) { |
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221 java_lang_Throwable::fill_in_stack_trace(exception, method()); |
0 | 222 } |
223 } else { | |
224 // if prior exception, throw that one instead | |
225 exception = Handle(THREAD, THREAD->pending_exception()); | |
226 } | |
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227 _throw(THREAD, file, line, exception); |
0 | 228 } |
229 | |
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230 void Exceptions::fthrow(Thread* thread, const char* file, int line, Symbol* h_name, const char* format, ...) { |
0 | 231 const int max_msg_size = 1024; |
232 va_list ap; | |
233 va_start(ap, format); | |
234 char msg[max_msg_size]; | |
235 vsnprintf(msg, max_msg_size, format, ap); | |
236 msg[max_msg_size-1] = '\0'; | |
237 va_end(ap); | |
238 _throw_msg(thread, file, line, h_name, msg); | |
239 } | |
240 | |
241 // Creates an exception oop, calls the <init> method with the given signature. | |
242 // and returns a Handle | |
243 // Initializes the cause if cause non-null | |
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244 Handle Exceptions::new_exception(Thread *thread, Symbol* h_name, |
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245 Symbol* signature, |
0 | 246 JavaCallArguments *args, |
247 Handle h_cause, Handle h_loader, | |
248 Handle h_protection_domain) { | |
249 assert(Universe::is_fully_initialized(), | |
250 "cannot be called during initialization"); | |
251 assert(thread->is_Java_thread(), "can only be called by a Java thread"); | |
252 assert(!thread->has_pending_exception(), "already has exception"); | |
253 | |
254 Handle h_exception; | |
255 | |
256 // Resolve exception klass | |
257 klassOop ik = SystemDictionary::resolve_or_fail(h_name, h_loader, h_protection_domain, true, thread); | |
258 instanceKlassHandle klass (thread, ik); | |
259 | |
260 if (!thread->has_pending_exception()) { | |
261 assert(klass.not_null(), "klass must exist"); | |
262 // We are about to create an instance - so make sure that klass is initialized | |
263 klass->initialize(thread); | |
264 if (!thread->has_pending_exception()) { | |
265 // Allocate new exception | |
266 h_exception = klass->allocate_instance_handle(thread); | |
267 if (!thread->has_pending_exception()) { | |
268 JavaValue result(T_VOID); | |
269 args->set_receiver(h_exception); | |
270 // Call constructor | |
271 JavaCalls::call_special(&result, klass, | |
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272 vmSymbols::object_initializer_name(), |
0 | 273 signature, |
274 args, | |
275 thread); | |
276 | |
277 } | |
278 } | |
279 | |
280 // Future: object initializer should take a cause argument | |
281 if (h_cause() != NULL) { | |
1142 | 282 assert(h_cause->is_a(SystemDictionary::Throwable_klass()), |
0 | 283 "exception cause is not a subclass of java/lang/Throwable"); |
284 JavaValue result1(T_OBJECT); | |
285 JavaCallArguments args1; | |
286 args1.set_receiver(h_exception); | |
287 args1.push_oop(h_cause); | |
288 JavaCalls::call_virtual(&result1, klass, | |
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289 vmSymbols::initCause_name(), |
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290 vmSymbols::throwable_throwable_signature(), |
0 | 291 &args1, |
292 thread); | |
293 } | |
294 } | |
295 | |
296 // Check if another exception was thrown in the process, if so rethrow that one | |
297 if (thread->has_pending_exception()) { | |
298 h_exception = Handle(thread, thread->pending_exception()); | |
299 thread->clear_pending_exception(); | |
300 } | |
301 return h_exception; | |
302 } | |
303 | |
304 // Convenience method. Calls either the <init>() or <init>(String) method when | |
305 // creating a new exception | |
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306 Handle Exceptions::new_exception(Thread* thread, Symbol* h_name, |
0 | 307 const char* message, Handle h_cause, |
308 Handle h_loader, | |
309 Handle h_protection_domain, | |
310 ExceptionMsgToUtf8Mode to_utf8_safe) { | |
311 JavaCallArguments args; | |
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312 Symbol* signature = NULL; |
0 | 313 if (message == NULL) { |
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314 signature = vmSymbols::void_method_signature(); |
0 | 315 } else { |
316 // We want to allocate storage, but we can't do that if there's | |
317 // a pending exception, so we preserve any pending exception | |
318 // around the allocation. | |
319 // If we get an exception from the allocation, prefer that to | |
320 // the exception we are trying to build, or the pending exception. | |
321 // This is sort of like what PRESERVE_EXCEPTION_MARK does, except | |
322 // for the preferencing and the early returns. | |
323 Handle incoming_exception (thread, NULL); | |
324 if (thread->has_pending_exception()) { | |
325 incoming_exception = Handle(thread, thread->pending_exception()); | |
326 thread->clear_pending_exception(); | |
327 } | |
328 Handle msg; | |
329 if (to_utf8_safe == safe_to_utf8) { | |
330 // Make a java UTF8 string. | |
331 msg = java_lang_String::create_from_str(message, thread); | |
332 } else { | |
333 // Make a java string keeping the encoding scheme of the original string. | |
334 msg = java_lang_String::create_from_platform_dependent_str(message, thread); | |
335 } | |
336 if (thread->has_pending_exception()) { | |
337 Handle exception(thread, thread->pending_exception()); | |
338 thread->clear_pending_exception(); | |
339 return exception; | |
340 } | |
341 if (incoming_exception.not_null()) { | |
342 return incoming_exception; | |
343 } | |
344 args.push_oop(msg); | |
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345 signature = vmSymbols::string_void_signature(); |
0 | 346 } |
347 return new_exception(thread, h_name, signature, &args, h_cause, h_loader, h_protection_domain); | |
348 } | |
349 | |
350 // Another convenience method that creates handles for null class loaders and | |
351 // protection domains and null causes. | |
352 // If the last parameter 'to_utf8_mode' is safe_to_utf8, | |
353 // it means we can safely ignore the encoding scheme of the message string and | |
354 // convert it directly to a java UTF8 string. Otherwise, we need to take the | |
355 // encoding scheme of the string into account. One thing we should do at some | |
356 // point is to push this flag down to class java_lang_String since other | |
357 // classes may need similar functionalities. | |
358 Handle Exceptions::new_exception(Thread* thread, | |
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359 Symbol* name, |
0 | 360 const char* message, |
361 ExceptionMsgToUtf8Mode to_utf8_safe) { | |
362 | |
363 Handle h_loader(thread, NULL); | |
364 Handle h_prot(thread, NULL); | |
365 Handle h_cause(thread, NULL); | |
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366 return Exceptions::new_exception(thread, name, message, h_cause, h_loader, |
0 | 367 h_prot, to_utf8_safe); |
368 } | |
369 | |
370 // Implementation of ExceptionMark | |
371 | |
372 ExceptionMark::ExceptionMark(Thread*& thread) { | |
373 thread = Thread::current(); | |
374 _thread = thread; | |
375 if (_thread->has_pending_exception()) { | |
376 oop exception = _thread->pending_exception(); | |
377 _thread->clear_pending_exception(); // Needed to avoid infinite recursion | |
378 exception->print(); | |
379 fatal("ExceptionMark constructor expects no pending exceptions"); | |
380 } | |
381 } | |
382 | |
383 | |
384 ExceptionMark::~ExceptionMark() { | |
385 if (_thread->has_pending_exception()) { | |
386 Handle exception(_thread, _thread->pending_exception()); | |
387 _thread->clear_pending_exception(); // Needed to avoid infinite recursion | |
388 if (is_init_completed()) { | |
389 exception->print(); | |
390 fatal("ExceptionMark destructor expects no pending exceptions"); | |
391 } else { | |
392 vm_exit_during_initialization(exception); | |
393 } | |
394 } | |
395 } | |
396 | |
397 // ---------------------------------------------------------------------------------------- | |
398 | |
399 #ifndef PRODUCT | |
400 // caller frees value_string if necessary | |
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401 void Exceptions::debug_check_abort(const char *value_string, const char* message) { |
0 | 402 if (AbortVMOnException != NULL && value_string != NULL && |
403 strstr(value_string, AbortVMOnException)) { | |
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404 if (AbortVMOnExceptionMessage == NULL || message == NULL || |
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405 strcmp(message, AbortVMOnExceptionMessage) == 0) { |
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406 fatal(err_msg("Saw %s, aborting", value_string)); |
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407 } |
0 | 408 } |
409 } | |
410 | |
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411 void Exceptions::debug_check_abort(Handle exception, const char* message) { |
0 | 412 if (AbortVMOnException != NULL) { |
413 ResourceMark rm; | |
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414 if (message == NULL && exception->is_a(SystemDictionary::Throwable_klass())) { |
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415 oop msg = java_lang_Throwable::message(exception); |
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416 if (msg != NULL) { |
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417 message = java_lang_String::as_utf8_string(msg); |
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418 } |
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419 } |
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420 debug_check_abort(instanceKlass::cast(exception()->klass())->external_name(), message); |
0 | 421 } |
422 } | |
423 #endif |