Mercurial > hg > truffle
annotate src/share/vm/utilities/exceptions.cpp @ 6725:da91efe96a93
6964458: Reimplement class meta-data storage to use native memory
Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes
Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland
Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
author | coleenp |
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date | Sat, 01 Sep 2012 13:25:18 -0400 |
parents | 93c71eb28866 |
children | e522a00b91aa f34d701e952e |
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() |
98 || thread->is_Compiler_thread() ) { | |
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() | |
121 || thread->is_Compiler_thread() ) { | |
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* name, const char* message, |
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168 Handle h_loader, Handle h_protection_domain) { |
0 | 169 // Check for special boot-strapping/vm-thread handling |
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170 if (special_exception(thread, file, line, name, message)) return; |
0 | 171 // Create and throw exception |
172 Handle h_cause(thread, NULL); | |
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173 Handle h_exception = new_exception(thread, name, message, h_cause, h_loader, h_protection_domain); |
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174 _throw(thread, file, line, h_exception, message); |
0 | 175 } |
176 | |
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177 void Exceptions::_throw_msg_cause(Thread* thread, const char* file, int line, Symbol* name, const char* message, Handle h_cause, |
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178 Handle h_loader, Handle h_protection_domain) { |
0 | 179 // Check for special boot-strapping/vm-thread handling |
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180 if (special_exception(thread, file, line, name, message)) return; |
0 | 181 // Create and throw exception and init cause |
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182 Handle h_exception = new_exception(thread, name, message, h_cause, h_loader, h_protection_domain); |
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183 _throw(thread, file, line, h_exception, message); |
0 | 184 } |
185 | |
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186 void Exceptions::_throw_cause(Thread* thread, const char* file, int line, Symbol* name, Handle h_cause, |
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187 Handle h_loader, Handle h_protection_domain) { |
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188 // Check for special boot-strapping/vm-thread handling |
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189 if (special_exception(thread, file, line, h_cause)) return; |
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190 // Create and throw exception |
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191 Handle h_exception = new_exception(thread, name, h_cause, h_loader, h_protection_domain); |
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192 _throw(thread, file, line, h_exception, NULL); |
0 | 193 } |
194 | |
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195 void Exceptions::_throw_args(Thread* thread, const char* file, int line, Symbol* name, Symbol* signature, JavaCallArguments *args) { |
0 | 196 // Check for special boot-strapping/vm-thread handling |
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197 if (special_exception(thread, file, line, name, NULL)) return; |
0 | 198 // Create and throw exception |
199 Handle h_loader(thread, NULL); | |
200 Handle h_prot(thread, NULL); | |
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201 Handle exception = new_exception(thread, name, signature, args, h_loader, h_prot); |
0 | 202 _throw(thread, file, line, exception); |
203 } | |
204 | |
205 | |
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206 // Methods for default parameters. |
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207 // NOTE: These must be here (and not in the header file) because of include circularities. |
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208 void Exceptions::_throw_msg_cause(Thread* thread, const char* file, int line, Symbol* name, const char* message, Handle h_cause) { |
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209 _throw_msg_cause(thread, file, line, name, message, h_cause, Handle(thread, NULL), Handle(thread, NULL)); |
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210 } |
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211 void Exceptions::_throw_msg(Thread* thread, const char* file, int line, Symbol* name, const char* message) { |
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212 _throw_msg(thread, file, line, name, message, Handle(thread, NULL), Handle(thread, NULL)); |
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213 } |
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214 void Exceptions::_throw_cause(Thread* thread, const char* file, int line, Symbol* name, Handle h_cause) { |
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215 _throw_cause(thread, file, line, name, h_cause, Handle(thread, NULL), Handle(thread, NULL)); |
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216 } |
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217 |
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218 |
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219 void Exceptions::throw_stack_overflow_exception(Thread* THREAD, const char* file, int line, methodHandle method) { |
0 | 220 Handle exception; |
221 if (!THREAD->has_pending_exception()) { | |
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222 Klass* k = SystemDictionary::StackOverflowError_klass(); |
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223 oop e = InstanceKlass::cast(k)->allocate_instance(CHECK); |
0 | 224 exception = Handle(THREAD, e); // fill_in_stack trace does gc |
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225 assert(InstanceKlass::cast(k)->is_initialized(), "need to increase min_stack_allowed calculation"); |
0 | 226 if (StackTraceInThrowable) { |
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227 java_lang_Throwable::fill_in_stack_trace(exception, method()); |
0 | 228 } |
229 } else { | |
230 // if prior exception, throw that one instead | |
231 exception = Handle(THREAD, THREAD->pending_exception()); | |
232 } | |
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233 _throw(THREAD, file, line, exception); |
0 | 234 } |
235 | |
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236 void Exceptions::fthrow(Thread* thread, const char* file, int line, Symbol* h_name, const char* format, ...) { |
0 | 237 const int max_msg_size = 1024; |
238 va_list ap; | |
239 va_start(ap, format); | |
240 char msg[max_msg_size]; | |
241 vsnprintf(msg, max_msg_size, format, ap); | |
242 msg[max_msg_size-1] = '\0'; | |
243 va_end(ap); | |
244 _throw_msg(thread, file, line, h_name, msg); | |
245 } | |
246 | |
247 // Creates an exception oop, calls the <init> method with the given signature. | |
248 // and returns a Handle | |
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249 Handle Exceptions::new_exception(Thread *thread, Symbol* name, |
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250 Symbol* signature, JavaCallArguments *args, |
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251 Handle h_loader, Handle h_protection_domain) { |
0 | 252 assert(Universe::is_fully_initialized(), |
253 "cannot be called during initialization"); | |
254 assert(thread->is_Java_thread(), "can only be called by a Java thread"); | |
255 assert(!thread->has_pending_exception(), "already has exception"); | |
256 | |
257 Handle h_exception; | |
258 | |
259 // Resolve exception klass | |
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260 Klass* ik = SystemDictionary::resolve_or_fail(name, h_loader, h_protection_domain, true, thread); |
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261 instanceKlassHandle klass(thread, ik); |
0 | 262 |
263 if (!thread->has_pending_exception()) { | |
264 assert(klass.not_null(), "klass must exist"); | |
265 // We are about to create an instance - so make sure that klass is initialized | |
266 klass->initialize(thread); | |
267 if (!thread->has_pending_exception()) { | |
268 // Allocate new exception | |
269 h_exception = klass->allocate_instance_handle(thread); | |
270 if (!thread->has_pending_exception()) { | |
271 JavaValue result(T_VOID); | |
272 args->set_receiver(h_exception); | |
273 // Call constructor | |
274 JavaCalls::call_special(&result, klass, | |
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275 vmSymbols::object_initializer_name(), |
0 | 276 signature, |
277 args, | |
278 thread); | |
279 } | |
280 } | |
281 } | |
282 | |
283 // Check if another exception was thrown in the process, if so rethrow that one | |
284 if (thread->has_pending_exception()) { | |
285 h_exception = Handle(thread, thread->pending_exception()); | |
286 thread->clear_pending_exception(); | |
287 } | |
288 return h_exception; | |
289 } | |
290 | |
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291 // Creates an exception oop, calls the <init> method with the given signature. |
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292 // and returns a Handle |
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293 // Initializes the cause if cause non-null |
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294 Handle Exceptions::new_exception(Thread *thread, Symbol* name, |
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295 Symbol* signature, JavaCallArguments *args, |
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296 Handle h_cause, |
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297 Handle h_loader, Handle h_protection_domain) { |
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298 Handle h_exception = new_exception(thread, name, signature, args, h_loader, h_protection_domain); |
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299 |
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300 // Future: object initializer should take a cause argument |
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301 if (h_cause.not_null()) { |
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302 assert(h_cause->is_a(SystemDictionary::Throwable_klass()), |
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303 "exception cause is not a subclass of java/lang/Throwable"); |
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304 JavaValue result1(T_OBJECT); |
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305 JavaCallArguments args1; |
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306 args1.set_receiver(h_exception); |
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307 args1.push_oop(h_cause); |
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308 JavaCalls::call_virtual(&result1, h_exception->klass(), |
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309 vmSymbols::initCause_name(), |
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310 vmSymbols::throwable_throwable_signature(), |
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311 &args1, |
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312 thread); |
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313 } |
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314 |
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315 // Check if another exception was thrown in the process, if so rethrow that one |
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316 if (thread->has_pending_exception()) { |
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317 h_exception = Handle(thread, thread->pending_exception()); |
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318 thread->clear_pending_exception(); |
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319 } |
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320 return h_exception; |
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321 } |
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322 |
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323 // Convenience method. Calls either the <init>() or <init>(Throwable) method when |
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324 // creating a new exception |
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325 Handle Exceptions::new_exception(Thread* thread, Symbol* name, |
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326 Handle h_cause, |
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327 Handle h_loader, Handle h_protection_domain, |
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328 ExceptionMsgToUtf8Mode to_utf8_safe) { |
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329 JavaCallArguments args; |
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330 Symbol* signature = NULL; |
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331 if (h_cause.is_null()) { |
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332 signature = vmSymbols::void_method_signature(); |
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333 } else { |
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334 signature = vmSymbols::throwable_void_signature(); |
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335 args.push_oop(h_cause); |
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336 } |
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337 return new_exception(thread, name, signature, &args, h_loader, h_protection_domain); |
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338 } |
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339 |
0 | 340 // Convenience method. Calls either the <init>() or <init>(String) method when |
341 // creating a new exception | |
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342 Handle Exceptions::new_exception(Thread* thread, Symbol* name, |
0 | 343 const char* message, Handle h_cause, |
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344 Handle h_loader, Handle h_protection_domain, |
0 | 345 ExceptionMsgToUtf8Mode to_utf8_safe) { |
346 JavaCallArguments args; | |
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347 Symbol* signature = NULL; |
0 | 348 if (message == NULL) { |
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349 signature = vmSymbols::void_method_signature(); |
0 | 350 } else { |
351 // We want to allocate storage, but we can't do that if there's | |
352 // a pending exception, so we preserve any pending exception | |
353 // around the allocation. | |
354 // If we get an exception from the allocation, prefer that to | |
355 // the exception we are trying to build, or the pending exception. | |
356 // This is sort of like what PRESERVE_EXCEPTION_MARK does, except | |
357 // for the preferencing and the early returns. | |
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358 Handle incoming_exception(thread, NULL); |
0 | 359 if (thread->has_pending_exception()) { |
360 incoming_exception = Handle(thread, thread->pending_exception()); | |
361 thread->clear_pending_exception(); | |
362 } | |
363 Handle msg; | |
364 if (to_utf8_safe == safe_to_utf8) { | |
365 // Make a java UTF8 string. | |
366 msg = java_lang_String::create_from_str(message, thread); | |
367 } else { | |
368 // Make a java string keeping the encoding scheme of the original string. | |
369 msg = java_lang_String::create_from_platform_dependent_str(message, thread); | |
370 } | |
371 if (thread->has_pending_exception()) { | |
372 Handle exception(thread, thread->pending_exception()); | |
373 thread->clear_pending_exception(); | |
374 return exception; | |
375 } | |
376 if (incoming_exception.not_null()) { | |
377 return incoming_exception; | |
378 } | |
379 args.push_oop(msg); | |
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380 signature = vmSymbols::string_void_signature(); |
0 | 381 } |
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382 return new_exception(thread, name, signature, &args, h_cause, h_loader, h_protection_domain); |
0 | 383 } |
384 | |
385 // Another convenience method that creates handles for null class loaders and | |
386 // protection domains and null causes. | |
387 // If the last parameter 'to_utf8_mode' is safe_to_utf8, | |
388 // it means we can safely ignore the encoding scheme of the message string and | |
389 // convert it directly to a java UTF8 string. Otherwise, we need to take the | |
390 // encoding scheme of the string into account. One thing we should do at some | |
391 // point is to push this flag down to class java_lang_String since other | |
392 // classes may need similar functionalities. | |
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393 Handle Exceptions::new_exception(Thread* thread, Symbol* name, |
0 | 394 const char* message, |
395 ExceptionMsgToUtf8Mode to_utf8_safe) { | |
396 | |
397 Handle h_loader(thread, NULL); | |
398 Handle h_prot(thread, NULL); | |
399 Handle h_cause(thread, NULL); | |
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400 return Exceptions::new_exception(thread, name, message, h_cause, h_loader, |
0 | 401 h_prot, to_utf8_safe); |
402 } | |
403 | |
404 // Implementation of ExceptionMark | |
405 | |
406 ExceptionMark::ExceptionMark(Thread*& thread) { | |
407 thread = Thread::current(); | |
408 _thread = thread; | |
409 if (_thread->has_pending_exception()) { | |
410 oop exception = _thread->pending_exception(); | |
411 _thread->clear_pending_exception(); // Needed to avoid infinite recursion | |
412 exception->print(); | |
413 fatal("ExceptionMark constructor expects no pending exceptions"); | |
414 } | |
415 } | |
416 | |
417 | |
418 ExceptionMark::~ExceptionMark() { | |
419 if (_thread->has_pending_exception()) { | |
420 Handle exception(_thread, _thread->pending_exception()); | |
421 _thread->clear_pending_exception(); // Needed to avoid infinite recursion | |
422 if (is_init_completed()) { | |
423 exception->print(); | |
424 fatal("ExceptionMark destructor expects no pending exceptions"); | |
425 } else { | |
426 vm_exit_during_initialization(exception); | |
427 } | |
428 } | |
429 } | |
430 | |
431 // ---------------------------------------------------------------------------------------- | |
432 | |
433 #ifndef PRODUCT | |
434 // caller frees value_string if necessary | |
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435 void Exceptions::debug_check_abort(const char *value_string, const char* message) { |
0 | 436 if (AbortVMOnException != NULL && value_string != NULL && |
437 strstr(value_string, AbortVMOnException)) { | |
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438 if (AbortVMOnExceptionMessage == NULL || message == NULL || |
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439 strcmp(message, AbortVMOnExceptionMessage) == 0) { |
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440 fatal(err_msg("Saw %s, aborting", value_string)); |
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441 } |
0 | 442 } |
443 } | |
444 | |
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445 void Exceptions::debug_check_abort(Handle exception, const char* message) { |
0 | 446 if (AbortVMOnException != NULL) { |
447 ResourceMark rm; | |
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448 if (message == NULL && exception->is_a(SystemDictionary::Throwable_klass())) { |
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449 oop msg = java_lang_Throwable::message(exception); |
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450 if (msg != NULL) { |
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451 message = java_lang_String::as_utf8_string(msg); |
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452 } |
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453 } |
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454 debug_check_abort(InstanceKlass::cast(exception()->klass())->external_name(), message); |
0 | 455 } |
456 } | |
457 #endif |