| /* |
| * Copyright (c) 1998, 2007, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| * |
| */ |
| |
| #include "incls/_precompiled.incl" |
| #include "incls/_exceptions.cpp.incl" |
| |
| |
| // Implementation of ThreadShadow |
| void check_ThreadShadow() { |
| const ByteSize offset1 = byte_offset_of(ThreadShadow, _pending_exception); |
| const ByteSize offset2 = Thread::pending_exception_offset(); |
| if (offset1 != offset2) fatal("ThreadShadow::_pending_exception is not positioned correctly"); |
| } |
| |
| |
| void ThreadShadow::set_pending_exception(oop exception, const char* file, int line) { |
| assert(exception != NULL && exception->is_oop(), "invalid exception oop"); |
| _pending_exception = exception; |
| _exception_file = file; |
| _exception_line = line; |
| } |
| |
| void ThreadShadow::clear_pending_exception() { |
| if (TraceClearedExceptions) { |
| if (_pending_exception != NULL) { |
| tty->print_cr("Thread::clear_pending_exception: cleared exception:"); |
| _pending_exception->print(); |
| } |
| } |
| _pending_exception = NULL; |
| _exception_file = NULL; |
| _exception_line = 0; |
| } |
| // Implementation of Exceptions |
| |
| bool Exceptions::special_exception(Thread* thread, const char* file, int line, Handle h_exception) { |
| // bootstrapping check |
| if (!Universe::is_fully_initialized()) { |
| vm_exit_during_initialization(h_exception); |
| ShouldNotReachHere(); |
| } |
| |
| if (thread->is_VM_thread() |
| || thread->is_Compiler_thread() ) { |
| // We do not care what kind of exception we get for the vm-thread or a thread which |
| // is compiling. We just install a dummy exception object |
| thread->set_pending_exception(Universe::vm_exception(), file, line); |
| return true; |
| } |
| |
| return false; |
| } |
| |
| bool Exceptions::special_exception(Thread* thread, const char* file, int line, symbolHandle h_name, const char* message) { |
| // bootstrapping check |
| if (!Universe::is_fully_initialized()) { |
| if (h_name.is_null()) { |
| // atleast an informative message. |
| vm_exit_during_initialization("Exception", message); |
| } else { |
| vm_exit_during_initialization(h_name, message); |
| } |
| ShouldNotReachHere(); |
| } |
| |
| if (thread->is_VM_thread() |
| || thread->is_Compiler_thread() ) { |
| // We do not care what kind of exception we get for the vm-thread or a thread which |
| // is compiling. We just install a dummy exception object |
| thread->set_pending_exception(Universe::vm_exception(), file, line); |
| return true; |
| } |
| |
| return false; |
| } |
| |
| // This method should only be called from generated code, |
| // therefore the exception oop should be in the oopmap. |
| void Exceptions::_throw_oop(Thread* thread, const char* file, int line, oop exception) { |
| assert(exception != NULL, "exception should not be NULL"); |
| Handle h_exception = Handle(thread, exception); |
| _throw(thread, file, line, h_exception); |
| } |
| |
| void Exceptions::_throw(Thread* thread, const char* file, int line, Handle h_exception, const char* message) { |
| assert(h_exception() != NULL, "exception should not be NULL"); |
| |
| // tracing (do this up front - so it works during boot strapping) |
| if (TraceExceptions) { |
| ttyLocker ttyl; |
| ResourceMark rm; |
| tty->print_cr("Exception <%s>%s%s (" INTPTR_FORMAT " ) \n" |
| "thrown [%s, line %d]\nfor thread " INTPTR_FORMAT, |
| h_exception->print_value_string(), |
| message ? ": " : "", message ? message : "", |
| (address)h_exception(), file, line, thread); |
| } |
| // for AbortVMOnException flag |
| NOT_PRODUCT(Exceptions::debug_check_abort(h_exception)); |
| |
| // Check for special boot-strapping/vm-thread handling |
| if (special_exception(thread, file, line, h_exception)) return; |
| |
| assert(h_exception->is_a(SystemDictionary::Throwable_klass()), "exception is not a subclass of java/lang/Throwable"); |
| |
| // set the pending exception |
| thread->set_pending_exception(h_exception(), file, line); |
| |
| // vm log |
| Events::log("throw_exception " INTPTR_FORMAT, (address)h_exception()); |
| } |
| |
| |
| void Exceptions::_throw_msg(Thread* thread, const char* file, int line, symbolHandle h_name, const char* message, Handle h_loader, Handle h_protection_domain) { |
| // Check for special boot-strapping/vm-thread handling |
| if (special_exception(thread, file, line, h_name, message)) return; |
| // Create and throw exception |
| Handle h_cause(thread, NULL); |
| Handle h_exception = new_exception(thread, h_name, message, h_cause, h_loader, h_protection_domain); |
| _throw(thread, file, line, h_exception, message); |
| } |
| |
| // Throw an exception with a message and a cause |
| 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) { |
| // Check for special boot-strapping/vm-thread handling |
| if (special_exception(thread, file, line, h_name, message)) return; |
| // Create and throw exception and init cause |
| Handle h_exception = new_exception(thread, h_name, message, h_cause, h_loader, h_protection_domain); |
| _throw(thread, file, line, h_exception, message); |
| } |
| |
| // This version creates handles and calls the other version |
| void Exceptions::_throw_msg(Thread* thread, const char* file, int line, |
| symbolOop name, const char* message) { |
| symbolHandle h_name(thread, name); |
| Handle h_loader(thread, NULL); |
| Handle h_protection_domain(thread, NULL); |
| Exceptions::_throw_msg(thread, file, line, h_name, message, h_loader, h_protection_domain); |
| } |
| |
| // This version already has a handle for name |
| void Exceptions::_throw_msg(Thread* thread, const char* file, int line, |
| symbolHandle name, const char* message) { |
| Handle h_loader(thread, NULL); |
| Handle h_protection_domain(thread, NULL); |
| Exceptions::_throw_msg(thread, file, line, name, message, h_loader, h_protection_domain); |
| } |
| |
| // This version already has a handle for name |
| void Exceptions::_throw_msg_cause(Thread* thread, const char* file, int line, |
| symbolHandle name, const char* message, Handle cause) { |
| Handle h_loader(thread, NULL); |
| Handle h_protection_domain(thread, NULL); |
| Exceptions::_throw_msg_cause(thread, file, line, name, message, cause, h_loader, h_protection_domain); |
| } |
| |
| void Exceptions::_throw_args(Thread* thread, const char* file, int line, symbolHandle h_name, symbolHandle h_signature, JavaCallArguments *args) { |
| // Check for special boot-strapping/vm-thread handling |
| if (special_exception(thread, file, line, h_name, NULL)) return; |
| // Create and throw exception |
| Handle h_loader(thread, NULL); |
| Handle h_prot(thread, NULL); |
| Handle h_cause(thread, NULL); |
| Handle exception = new_exception(thread, h_name, h_signature, args, h_cause, h_loader, h_prot); |
| _throw(thread, file, line, exception); |
| } |
| |
| |
| void Exceptions::throw_stack_overflow_exception(Thread* THREAD, const char* file, int line) { |
| Handle exception; |
| if (!THREAD->has_pending_exception()) { |
| klassOop k = SystemDictionary::StackOverflowError_klass(); |
| oop e = instanceKlass::cast(k)->allocate_instance(CHECK); |
| exception = Handle(THREAD, e); // fill_in_stack trace does gc |
| if (StackTraceInThrowable) { |
| java_lang_Throwable::fill_in_stack_trace(exception); |
| } |
| } else { |
| // if prior exception, throw that one instead |
| exception = Handle(THREAD, THREAD->pending_exception()); |
| } |
| _throw_oop(THREAD, file, line, exception()); |
| } |
| |
| void Exceptions::fthrow(Thread* thread, const char* file, int line, symbolHandle h_name, const char* format, ...) { |
| const int max_msg_size = 1024; |
| va_list ap; |
| va_start(ap, format); |
| char msg[max_msg_size]; |
| vsnprintf(msg, max_msg_size, format, ap); |
| msg[max_msg_size-1] = '\0'; |
| va_end(ap); |
| _throw_msg(thread, file, line, h_name, msg); |
| } |
| |
| // Creates an exception oop, calls the <init> method with the given signature. |
| // and returns a Handle |
| // Initializes the cause if cause non-null |
| Handle Exceptions::new_exception(Thread *thread, symbolHandle h_name, |
| symbolHandle signature, |
| JavaCallArguments *args, |
| Handle h_cause, Handle h_loader, |
| Handle h_protection_domain) { |
| assert(Universe::is_fully_initialized(), |
| "cannot be called during initialization"); |
| assert(thread->is_Java_thread(), "can only be called by a Java thread"); |
| assert(!thread->has_pending_exception(), "already has exception"); |
| |
| Handle h_exception; |
| |
| // Resolve exception klass |
| klassOop ik = SystemDictionary::resolve_or_fail(h_name, h_loader, h_protection_domain, true, thread); |
| instanceKlassHandle klass (thread, ik); |
| |
| if (!thread->has_pending_exception()) { |
| assert(klass.not_null(), "klass must exist"); |
| // We are about to create an instance - so make sure that klass is initialized |
| klass->initialize(thread); |
| if (!thread->has_pending_exception()) { |
| // Allocate new exception |
| h_exception = klass->allocate_instance_handle(thread); |
| if (!thread->has_pending_exception()) { |
| JavaValue result(T_VOID); |
| args->set_receiver(h_exception); |
| // Call constructor |
| JavaCalls::call_special(&result, klass, |
| vmSymbolHandles::object_initializer_name(), |
| signature, |
| args, |
| thread); |
| |
| } |
| } |
| |
| // Future: object initializer should take a cause argument |
| if (h_cause() != NULL) { |
| assert(h_cause->is_a(SystemDictionary::Throwable_klass()), |
| "exception cause is not a subclass of java/lang/Throwable"); |
| JavaValue result1(T_OBJECT); |
| JavaCallArguments args1; |
| args1.set_receiver(h_exception); |
| args1.push_oop(h_cause); |
| JavaCalls::call_virtual(&result1, klass, |
| vmSymbolHandles::initCause_name(), |
| vmSymbolHandles::throwable_throwable_signature(), |
| &args1, |
| thread); |
| } |
| } |
| |
| // Check if another exception was thrown in the process, if so rethrow that one |
| if (thread->has_pending_exception()) { |
| h_exception = Handle(thread, thread->pending_exception()); |
| thread->clear_pending_exception(); |
| } |
| return h_exception; |
| } |
| |
| // Convenience method. Calls either the <init>() or <init>(String) method when |
| // creating a new exception |
| Handle Exceptions::new_exception(Thread* thread, symbolHandle h_name, |
| const char* message, Handle h_cause, |
| Handle h_loader, |
| Handle h_protection_domain, |
| ExceptionMsgToUtf8Mode to_utf8_safe) { |
| JavaCallArguments args; |
| symbolHandle signature; |
| if (message == NULL) { |
| signature = vmSymbolHandles::void_method_signature(); |
| } else { |
| // We want to allocate storage, but we can't do that if there's |
| // a pending exception, so we preserve any pending exception |
| // around the allocation. |
| // If we get an exception from the allocation, prefer that to |
| // the exception we are trying to build, or the pending exception. |
| // This is sort of like what PRESERVE_EXCEPTION_MARK does, except |
| // for the preferencing and the early returns. |
| Handle incoming_exception (thread, NULL); |
| if (thread->has_pending_exception()) { |
| incoming_exception = Handle(thread, thread->pending_exception()); |
| thread->clear_pending_exception(); |
| } |
| Handle msg; |
| if (to_utf8_safe == safe_to_utf8) { |
| // Make a java UTF8 string. |
| msg = java_lang_String::create_from_str(message, thread); |
| } else { |
| // Make a java string keeping the encoding scheme of the original string. |
| msg = java_lang_String::create_from_platform_dependent_str(message, thread); |
| } |
| if (thread->has_pending_exception()) { |
| Handle exception(thread, thread->pending_exception()); |
| thread->clear_pending_exception(); |
| return exception; |
| } |
| if (incoming_exception.not_null()) { |
| return incoming_exception; |
| } |
| args.push_oop(msg); |
| signature = vmSymbolHandles::string_void_signature(); |
| } |
| return new_exception(thread, h_name, signature, &args, h_cause, h_loader, h_protection_domain); |
| } |
| |
| // Another convenience method that creates handles for null class loaders and |
| // protection domains and null causes. |
| // If the last parameter 'to_utf8_mode' is safe_to_utf8, |
| // it means we can safely ignore the encoding scheme of the message string and |
| // convert it directly to a java UTF8 string. Otherwise, we need to take the |
| // encoding scheme of the string into account. One thing we should do at some |
| // point is to push this flag down to class java_lang_String since other |
| // classes may need similar functionalities. |
| Handle Exceptions::new_exception(Thread* thread, |
| symbolOop name, |
| const char* message, |
| ExceptionMsgToUtf8Mode to_utf8_safe) { |
| |
| symbolHandle h_name(thread, name); |
| Handle h_loader(thread, NULL); |
| Handle h_prot(thread, NULL); |
| Handle h_cause(thread, NULL); |
| return Exceptions::new_exception(thread, h_name, message, h_cause, h_loader, |
| h_prot, to_utf8_safe); |
| } |
| |
| // Implementation of ExceptionMark |
| |
| ExceptionMark::ExceptionMark(Thread*& thread) { |
| thread = Thread::current(); |
| _thread = thread; |
| if (_thread->has_pending_exception()) { |
| oop exception = _thread->pending_exception(); |
| _thread->clear_pending_exception(); // Needed to avoid infinite recursion |
| exception->print(); |
| fatal("ExceptionMark constructor expects no pending exceptions"); |
| } |
| } |
| |
| |
| ExceptionMark::~ExceptionMark() { |
| if (_thread->has_pending_exception()) { |
| Handle exception(_thread, _thread->pending_exception()); |
| _thread->clear_pending_exception(); // Needed to avoid infinite recursion |
| if (is_init_completed()) { |
| exception->print(); |
| fatal("ExceptionMark destructor expects no pending exceptions"); |
| } else { |
| vm_exit_during_initialization(exception); |
| } |
| } |
| } |
| |
| // ---------------------------------------------------------------------------------------- |
| |
| #ifndef PRODUCT |
| // caller frees value_string if necessary |
| void Exceptions::debug_check_abort(const char *value_string) { |
| if (AbortVMOnException != NULL && value_string != NULL && |
| strstr(value_string, AbortVMOnException)) { |
| fatal(err_msg("Saw %s, aborting", value_string)); |
| } |
| } |
| |
| void Exceptions::debug_check_abort(Handle exception) { |
| if (AbortVMOnException != NULL) { |
| ResourceMark rm; |
| debug_check_abort(instanceKlass::cast(exception()->klass())->external_name()); |
| } |
| } |
| #endif |