Thu, 27 May 2010 19:08:38 -0700
6941466: Oracle rebranding changes for Hotspot repositories
Summary: Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair
1 /*
2 * Copyright (c) 1998, 2007, Oracle and/or its affiliates. All rights reserved.
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 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 *
23 */
25 #include "incls/_precompiled.incl"
26 #include "incls/_exceptions.cpp.incl"
29 // Implementation of ThreadShadow
30 void check_ThreadShadow() {
31 const ByteSize offset1 = byte_offset_of(ThreadShadow, _pending_exception);
32 const ByteSize offset2 = Thread::pending_exception_offset();
33 if (offset1 != offset2) fatal("ThreadShadow::_pending_exception is not positioned correctly");
34 }
37 void ThreadShadow::set_pending_exception(oop exception, const char* file, int line) {
38 assert(exception != NULL && exception->is_oop(), "invalid exception oop");
39 _pending_exception = exception;
40 _exception_file = file;
41 _exception_line = line;
42 }
44 void ThreadShadow::clear_pending_exception() {
45 if (TraceClearedExceptions) {
46 if (_pending_exception != NULL) {
47 tty->print_cr("Thread::clear_pending_exception: cleared exception:");
48 _pending_exception->print();
49 }
50 }
51 _pending_exception = NULL;
52 _exception_file = NULL;
53 _exception_line = 0;
54 }
55 // Implementation of Exceptions
57 bool Exceptions::special_exception(Thread* thread, const char* file, int line, Handle h_exception) {
58 // bootstrapping check
59 if (!Universe::is_fully_initialized()) {
60 vm_exit_during_initialization(h_exception);
61 ShouldNotReachHere();
62 }
64 if (thread->is_VM_thread()
65 || thread->is_Compiler_thread() ) {
66 // We do not care what kind of exception we get for the vm-thread or a thread which
67 // is compiling. We just install a dummy exception object
68 thread->set_pending_exception(Universe::vm_exception(), file, line);
69 return true;
70 }
72 return false;
73 }
75 bool Exceptions::special_exception(Thread* thread, const char* file, int line, symbolHandle h_name, const char* message) {
76 // bootstrapping check
77 if (!Universe::is_fully_initialized()) {
78 if (h_name.is_null()) {
79 // atleast an informative message.
80 vm_exit_during_initialization("Exception", message);
81 } else {
82 vm_exit_during_initialization(h_name, message);
83 }
84 ShouldNotReachHere();
85 }
87 if (thread->is_VM_thread()
88 || thread->is_Compiler_thread() ) {
89 // We do not care what kind of exception we get for the vm-thread or a thread which
90 // is compiling. We just install a dummy exception object
91 thread->set_pending_exception(Universe::vm_exception(), file, line);
92 return true;
93 }
95 return false;
96 }
98 // This method should only be called from generated code,
99 // therefore the exception oop should be in the oopmap.
100 void Exceptions::_throw_oop(Thread* thread, const char* file, int line, oop exception) {
101 assert(exception != NULL, "exception should not be NULL");
102 Handle h_exception = Handle(thread, exception);
103 _throw(thread, file, line, h_exception);
104 }
106 void Exceptions::_throw(Thread* thread, const char* file, int line, Handle h_exception, const char* message) {
107 assert(h_exception() != NULL, "exception should not be NULL");
109 // tracing (do this up front - so it works during boot strapping)
110 if (TraceExceptions) {
111 ttyLocker ttyl;
112 ResourceMark rm;
113 tty->print_cr("Exception <%s>%s%s (" INTPTR_FORMAT " ) \n"
114 "thrown [%s, line %d]\nfor thread " INTPTR_FORMAT,
115 h_exception->print_value_string(),
116 message ? ": " : "", message ? message : "",
117 (address)h_exception(), file, line, thread);
118 }
119 // for AbortVMOnException flag
120 NOT_PRODUCT(Exceptions::debug_check_abort(h_exception));
122 // Check for special boot-strapping/vm-thread handling
123 if (special_exception(thread, file, line, h_exception)) return;
125 assert(h_exception->is_a(SystemDictionary::Throwable_klass()), "exception is not a subclass of java/lang/Throwable");
127 // set the pending exception
128 thread->set_pending_exception(h_exception(), file, line);
130 // vm log
131 Events::log("throw_exception " INTPTR_FORMAT, (address)h_exception());
132 }
135 void Exceptions::_throw_msg(Thread* thread, const char* file, int line, symbolHandle h_name, const char* message, Handle h_loader, Handle h_protection_domain) {
136 // Check for special boot-strapping/vm-thread handling
137 if (special_exception(thread, file, line, h_name, message)) return;
138 // Create and throw exception
139 Handle h_cause(thread, NULL);
140 Handle h_exception = new_exception(thread, h_name, message, h_cause, h_loader, h_protection_domain);
141 _throw(thread, file, line, h_exception, message);
142 }
144 // Throw an exception with a message and a cause
145 void Exceptions::_throw_msg_cause(Thread* thread, const char* file, int line, symbolHandle h_name, const char* message, Handle h_cause, Handle h_loader, Handle h_protection_domain) {
146 // Check for special boot-strapping/vm-thread handling
147 if (special_exception(thread, file, line, h_name, message)) return;
148 // Create and throw exception and init cause
149 Handle h_exception = new_exception(thread, h_name, message, h_cause, h_loader, h_protection_domain);
150 _throw(thread, file, line, h_exception, message);
151 }
153 // This version creates handles and calls the other version
154 void Exceptions::_throw_msg(Thread* thread, const char* file, int line,
155 symbolOop name, const char* message) {
156 symbolHandle h_name(thread, name);
157 Handle h_loader(thread, NULL);
158 Handle h_protection_domain(thread, NULL);
159 Exceptions::_throw_msg(thread, file, line, h_name, message, h_loader, h_protection_domain);
160 }
162 // This version already has a handle for name
163 void Exceptions::_throw_msg(Thread* thread, const char* file, int line,
164 symbolHandle name, const char* message) {
165 Handle h_loader(thread, NULL);
166 Handle h_protection_domain(thread, NULL);
167 Exceptions::_throw_msg(thread, file, line, name, message, h_loader, h_protection_domain);
168 }
170 // This version already has a handle for name
171 void Exceptions::_throw_msg_cause(Thread* thread, const char* file, int line,
172 symbolHandle name, const char* message, Handle cause) {
173 Handle h_loader(thread, NULL);
174 Handle h_protection_domain(thread, NULL);
175 Exceptions::_throw_msg_cause(thread, file, line, name, message, cause, h_loader, h_protection_domain);
176 }
178 void Exceptions::_throw_args(Thread* thread, const char* file, int line, symbolHandle h_name, symbolHandle h_signature, JavaCallArguments *args) {
179 // Check for special boot-strapping/vm-thread handling
180 if (special_exception(thread, file, line, h_name, NULL)) return;
181 // Create and throw exception
182 Handle h_loader(thread, NULL);
183 Handle h_prot(thread, NULL);
184 Handle h_cause(thread, NULL);
185 Handle exception = new_exception(thread, h_name, h_signature, args, h_cause, h_loader, h_prot);
186 _throw(thread, file, line, exception);
187 }
190 void Exceptions::throw_stack_overflow_exception(Thread* THREAD, const char* file, int line) {
191 Handle exception;
192 if (!THREAD->has_pending_exception()) {
193 klassOop k = SystemDictionary::StackOverflowError_klass();
194 oop e = instanceKlass::cast(k)->allocate_instance(CHECK);
195 exception = Handle(THREAD, e); // fill_in_stack trace does gc
196 if (StackTraceInThrowable) {
197 java_lang_Throwable::fill_in_stack_trace(exception);
198 }
199 } else {
200 // if prior exception, throw that one instead
201 exception = Handle(THREAD, THREAD->pending_exception());
202 }
203 _throw_oop(THREAD, file, line, exception());
204 }
206 void Exceptions::fthrow(Thread* thread, const char* file, int line, symbolHandle h_name, const char* format, ...) {
207 const int max_msg_size = 1024;
208 va_list ap;
209 va_start(ap, format);
210 char msg[max_msg_size];
211 vsnprintf(msg, max_msg_size, format, ap);
212 msg[max_msg_size-1] = '\0';
213 va_end(ap);
214 _throw_msg(thread, file, line, h_name, msg);
215 }
217 // Creates an exception oop, calls the <init> method with the given signature.
218 // and returns a Handle
219 // Initializes the cause if cause non-null
220 Handle Exceptions::new_exception(Thread *thread, symbolHandle h_name,
221 symbolHandle signature,
222 JavaCallArguments *args,
223 Handle h_cause, Handle h_loader,
224 Handle h_protection_domain) {
225 assert(Universe::is_fully_initialized(),
226 "cannot be called during initialization");
227 assert(thread->is_Java_thread(), "can only be called by a Java thread");
228 assert(!thread->has_pending_exception(), "already has exception");
230 Handle h_exception;
232 // Resolve exception klass
233 klassOop ik = SystemDictionary::resolve_or_fail(h_name, h_loader, h_protection_domain, true, thread);
234 instanceKlassHandle klass (thread, ik);
236 if (!thread->has_pending_exception()) {
237 assert(klass.not_null(), "klass must exist");
238 // We are about to create an instance - so make sure that klass is initialized
239 klass->initialize(thread);
240 if (!thread->has_pending_exception()) {
241 // Allocate new exception
242 h_exception = klass->allocate_instance_handle(thread);
243 if (!thread->has_pending_exception()) {
244 JavaValue result(T_VOID);
245 args->set_receiver(h_exception);
246 // Call constructor
247 JavaCalls::call_special(&result, klass,
248 vmSymbolHandles::object_initializer_name(),
249 signature,
250 args,
251 thread);
253 }
254 }
256 // Future: object initializer should take a cause argument
257 if (h_cause() != NULL) {
258 assert(h_cause->is_a(SystemDictionary::Throwable_klass()),
259 "exception cause is not a subclass of java/lang/Throwable");
260 JavaValue result1(T_OBJECT);
261 JavaCallArguments args1;
262 args1.set_receiver(h_exception);
263 args1.push_oop(h_cause);
264 JavaCalls::call_virtual(&result1, klass,
265 vmSymbolHandles::initCause_name(),
266 vmSymbolHandles::throwable_throwable_signature(),
267 &args1,
268 thread);
269 }
270 }
272 // Check if another exception was thrown in the process, if so rethrow that one
273 if (thread->has_pending_exception()) {
274 h_exception = Handle(thread, thread->pending_exception());
275 thread->clear_pending_exception();
276 }
277 return h_exception;
278 }
280 // Convenience method. Calls either the <init>() or <init>(String) method when
281 // creating a new exception
282 Handle Exceptions::new_exception(Thread* thread, symbolHandle h_name,
283 const char* message, Handle h_cause,
284 Handle h_loader,
285 Handle h_protection_domain,
286 ExceptionMsgToUtf8Mode to_utf8_safe) {
287 JavaCallArguments args;
288 symbolHandle signature;
289 if (message == NULL) {
290 signature = vmSymbolHandles::void_method_signature();
291 } else {
292 // We want to allocate storage, but we can't do that if there's
293 // a pending exception, so we preserve any pending exception
294 // around the allocation.
295 // If we get an exception from the allocation, prefer that to
296 // the exception we are trying to build, or the pending exception.
297 // This is sort of like what PRESERVE_EXCEPTION_MARK does, except
298 // for the preferencing and the early returns.
299 Handle incoming_exception (thread, NULL);
300 if (thread->has_pending_exception()) {
301 incoming_exception = Handle(thread, thread->pending_exception());
302 thread->clear_pending_exception();
303 }
304 Handle msg;
305 if (to_utf8_safe == safe_to_utf8) {
306 // Make a java UTF8 string.
307 msg = java_lang_String::create_from_str(message, thread);
308 } else {
309 // Make a java string keeping the encoding scheme of the original string.
310 msg = java_lang_String::create_from_platform_dependent_str(message, thread);
311 }
312 if (thread->has_pending_exception()) {
313 Handle exception(thread, thread->pending_exception());
314 thread->clear_pending_exception();
315 return exception;
316 }
317 if (incoming_exception.not_null()) {
318 return incoming_exception;
319 }
320 args.push_oop(msg);
321 signature = vmSymbolHandles::string_void_signature();
322 }
323 return new_exception(thread, h_name, signature, &args, h_cause, h_loader, h_protection_domain);
324 }
326 // Another convenience method that creates handles for null class loaders and
327 // protection domains and null causes.
328 // If the last parameter 'to_utf8_mode' is safe_to_utf8,
329 // it means we can safely ignore the encoding scheme of the message string and
330 // convert it directly to a java UTF8 string. Otherwise, we need to take the
331 // encoding scheme of the string into account. One thing we should do at some
332 // point is to push this flag down to class java_lang_String since other
333 // classes may need similar functionalities.
334 Handle Exceptions::new_exception(Thread* thread,
335 symbolOop name,
336 const char* message,
337 ExceptionMsgToUtf8Mode to_utf8_safe) {
339 symbolHandle h_name(thread, name);
340 Handle h_loader(thread, NULL);
341 Handle h_prot(thread, NULL);
342 Handle h_cause(thread, NULL);
343 return Exceptions::new_exception(thread, h_name, message, h_cause, h_loader,
344 h_prot, to_utf8_safe);
345 }
347 // Implementation of ExceptionMark
349 ExceptionMark::ExceptionMark(Thread*& thread) {
350 thread = Thread::current();
351 _thread = thread;
352 if (_thread->has_pending_exception()) {
353 oop exception = _thread->pending_exception();
354 _thread->clear_pending_exception(); // Needed to avoid infinite recursion
355 exception->print();
356 fatal("ExceptionMark constructor expects no pending exceptions");
357 }
358 }
361 ExceptionMark::~ExceptionMark() {
362 if (_thread->has_pending_exception()) {
363 Handle exception(_thread, _thread->pending_exception());
364 _thread->clear_pending_exception(); // Needed to avoid infinite recursion
365 if (is_init_completed()) {
366 exception->print();
367 fatal("ExceptionMark destructor expects no pending exceptions");
368 } else {
369 vm_exit_during_initialization(exception);
370 }
371 }
372 }
374 // ----------------------------------------------------------------------------------------
376 #ifndef PRODUCT
377 // caller frees value_string if necessary
378 void Exceptions::debug_check_abort(const char *value_string) {
379 if (AbortVMOnException != NULL && value_string != NULL &&
380 strstr(value_string, AbortVMOnException)) {
381 fatal(err_msg("Saw %s, aborting", value_string));
382 }
383 }
385 void Exceptions::debug_check_abort(Handle exception) {
386 if (AbortVMOnException != NULL) {
387 ResourceMark rm;
388 debug_check_abort(instanceKlass::cast(exception()->klass())->external_name());
389 }
390 }
391 #endif