| /* |
| * Copyright (c) 1998, 2016, 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 "precompiled.hpp" |
| #include "classfile/systemDictionary.hpp" |
| #include "classfile/vmSymbols.hpp" |
| #include "compiler/compileBroker.hpp" |
| #include "logging/log.hpp" |
| #include "oops/oop.inline.hpp" |
| #include "runtime/init.hpp" |
| #include "runtime/java.hpp" |
| #include "runtime/javaCalls.hpp" |
| #include "runtime/thread.inline.hpp" |
| #include "runtime/threadCritical.hpp" |
| #include "utilities/events.hpp" |
| #include "utilities/exceptions.hpp" |
| |
| // 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(); |
| } |
| |
| #ifdef ASSERT |
| // Check for trying to throw stack overflow before initialization is complete |
| // to prevent infinite recursion trying to initialize stack overflow without |
| // adequate stack space. |
| // This can happen with stress testing a large value of StackShadowPages |
| if (h_exception()->klass() == SystemDictionary::StackOverflowError_klass()) { |
| InstanceKlass* ik = InstanceKlass::cast(h_exception->klass()); |
| assert(ik->is_initialized(), |
| "need to increase min_stack_allowed calculation"); |
| } |
| #endif // ASSERT |
| |
| if (thread->is_VM_thread() |
| || !thread->can_call_java() |
| || DumpSharedSpaces ) { |
| // 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 |
| // |
| // We also cannot throw a proper exception when dumping, because we cannot run |
| // Java bytecodes now. A dummy exception will suffice. |
| thread->set_pending_exception(Universe::vm_exception(), file, line); |
| return true; |
| } |
| |
| return false; |
| } |
| |
| bool Exceptions::special_exception(Thread* thread, const char* file, int line, Symbol* h_name, const char* message) { |
| // bootstrapping check |
| if (!Universe::is_fully_initialized()) { |
| if (h_name == 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->can_call_java() |
| || DumpSharedSpaces ) { |
| // 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 |
| // |
| // We also cannot throw a proper exception when dumping, because we cannot run |
| // Java bytecodes now. A dummy exception will suffice. |
| 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) { |
| ResourceMark rm; |
| assert(h_exception() != NULL, "exception should not be NULL"); |
| |
| // tracing (do this up front - so it works during boot strapping) |
| log_info(exceptions)("Exception <%s%s%s> (" INTPTR_FORMAT ") \n" |
| "thrown [%s, line %d]\nfor thread " INTPTR_FORMAT, |
| h_exception->print_value_string(), |
| message ? ": " : "", message ? message : "", |
| p2i(h_exception()), file, line, p2i(thread)); |
| // for AbortVMOnException flag |
| Exceptions::debug_check_abort(h_exception, message); |
| |
| // Check for special boot-strapping/vm-thread handling |
| if (special_exception(thread, file, line, h_exception)) { |
| return; |
| } |
| |
| if (h_exception->is_a(SystemDictionary::OutOfMemoryError_klass())) { |
| count_out_of_memory_exceptions(h_exception); |
| } |
| |
| 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 |
| if (LogEvents){ |
| Events::log_exception(thread, "Exception <%s%s%s> (" INTPTR_FORMAT ") thrown at [%s, line %d]", |
| h_exception->print_value_string(), message ? ": " : "", message ? message : "", |
| p2i(h_exception()), file, line); |
| } |
| } |
| |
| |
| void Exceptions::_throw_msg(Thread* thread, const char* file, int line, Symbol* 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, name, message)) return; |
| // Create and throw exception |
| Handle h_cause(thread, NULL); |
| Handle h_exception = new_exception(thread, name, message, h_cause, h_loader, h_protection_domain); |
| _throw(thread, file, line, h_exception, message); |
| } |
| |
| void Exceptions::_throw_msg_cause(Thread* thread, const char* file, int line, Symbol* 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, name, message)) return; |
| // Create and throw exception and init cause |
| Handle h_exception = new_exception(thread, name, message, h_cause, h_loader, h_protection_domain); |
| _throw(thread, file, line, h_exception, message); |
| } |
| |
| void Exceptions::_throw_cause(Thread* thread, const char* file, int line, Symbol* name, 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_cause)) return; |
| // Create and throw exception |
| Handle h_exception = new_exception(thread, name, h_cause, h_loader, h_protection_domain); |
| _throw(thread, file, line, h_exception, NULL); |
| } |
| |
| void Exceptions::_throw_args(Thread* thread, const char* file, int line, Symbol* name, Symbol* signature, JavaCallArguments *args) { |
| // Check for special boot-strapping/vm-thread handling |
| if (special_exception(thread, file, line, name, NULL)) return; |
| // Create and throw exception |
| Handle h_loader(thread, NULL); |
| Handle h_prot(thread, NULL); |
| Handle exception = new_exception(thread, name, signature, args, h_loader, h_prot); |
| _throw(thread, file, line, exception); |
| } |
| |
| |
| // Methods for default parameters. |
| // NOTE: These must be here (and not in the header file) because of include circularities. |
| void Exceptions::_throw_msg_cause(Thread* thread, const char* file, int line, Symbol* name, const char* message, Handle h_cause) { |
| _throw_msg_cause(thread, file, line, name, message, h_cause, Handle(thread, NULL), Handle(thread, NULL)); |
| } |
| void Exceptions::_throw_msg(Thread* thread, const char* file, int line, Symbol* name, const char* message) { |
| _throw_msg(thread, file, line, name, message, Handle(thread, NULL), Handle(thread, NULL)); |
| } |
| void Exceptions::_throw_cause(Thread* thread, const char* file, int line, Symbol* name, Handle h_cause) { |
| _throw_cause(thread, file, line, name, h_cause, Handle(thread, NULL), Handle(thread, NULL)); |
| } |
| |
| |
| void Exceptions::throw_stack_overflow_exception(Thread* THREAD, const char* file, int line, const methodHandle& method) { |
| Handle exception; |
| if (!THREAD->has_pending_exception()) { |
| Klass* k = SystemDictionary::StackOverflowError_klass(); |
| oop e = InstanceKlass::cast(k)->allocate_instance(CHECK); |
| exception = Handle(THREAD, e); // fill_in_stack trace does gc |
| assert(InstanceKlass::cast(k)->is_initialized(), "need to increase min_stack_allowed calculation"); |
| if (StackTraceInThrowable) { |
| java_lang_Throwable::fill_in_stack_trace(exception, method()); |
| } |
| // Increment counter for hs_err file reporting |
| Atomic::inc(&Exceptions::_stack_overflow_errors); |
| } else { |
| // if prior exception, throw that one instead |
| exception = Handle(THREAD, THREAD->pending_exception()); |
| } |
| _throw(THREAD, file, line, exception); |
| } |
| |
| void Exceptions::fthrow(Thread* thread, const char* file, int line, Symbol* 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 |
| Handle Exceptions::new_exception(Thread *thread, Symbol* name, |
| Symbol* signature, JavaCallArguments *args, |
| 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 |
| Klass* ik = SystemDictionary::resolve_or_fail(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, |
| vmSymbols::object_initializer_name(), |
| signature, |
| args, |
| 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; |
| } |
| |
| // 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, Symbol* name, |
| Symbol* signature, JavaCallArguments *args, |
| Handle h_cause, |
| Handle h_loader, Handle h_protection_domain) { |
| Handle h_exception = new_exception(thread, name, signature, args, h_loader, h_protection_domain); |
| |
| // Future: object initializer should take a cause argument |
| if (h_cause.not_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, h_exception->klass(), |
| vmSymbols::initCause_name(), |
| vmSymbols::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>(Throwable) method when |
| // creating a new exception |
| Handle Exceptions::new_exception(Thread* thread, Symbol* name, |
| Handle h_cause, |
| Handle h_loader, Handle h_protection_domain, |
| ExceptionMsgToUtf8Mode to_utf8_safe) { |
| JavaCallArguments args; |
| Symbol* signature = NULL; |
| if (h_cause.is_null()) { |
| signature = vmSymbols::void_method_signature(); |
| } else { |
| signature = vmSymbols::throwable_void_signature(); |
| args.push_oop(h_cause); |
| } |
| return new_exception(thread, name, signature, &args, h_loader, h_protection_domain); |
| } |
| |
| // Convenience method. Calls either the <init>() or <init>(String) method when |
| // creating a new exception |
| Handle Exceptions::new_exception(Thread* thread, Symbol* name, |
| const char* message, Handle h_cause, |
| Handle h_loader, Handle h_protection_domain, |
| ExceptionMsgToUtf8Mode to_utf8_safe) { |
| JavaCallArguments args; |
| Symbol* signature = NULL; |
| if (message == NULL) { |
| signature = vmSymbols::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 = vmSymbols::string_void_signature(); |
| } |
| return new_exception(thread, 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, Symbol* name, |
| const char* message, |
| ExceptionMsgToUtf8Mode to_utf8_safe) { |
| |
| Handle h_loader(thread, NULL); |
| Handle h_prot(thread, NULL); |
| Handle h_cause(thread, NULL); |
| return Exceptions::new_exception(thread, name, message, h_cause, h_loader, |
| h_prot, to_utf8_safe); |
| } |
| |
| |
| // Exception counting for hs_err file |
| volatile int Exceptions::_stack_overflow_errors = 0; |
| volatile int Exceptions::_out_of_memory_error_java_heap_errors = 0; |
| volatile int Exceptions::_out_of_memory_error_metaspace_errors = 0; |
| volatile int Exceptions::_out_of_memory_error_class_metaspace_errors = 0; |
| |
| void Exceptions::count_out_of_memory_exceptions(Handle exception) { |
| if (exception() == Universe::out_of_memory_error_metaspace()) { |
| Atomic::inc(&_out_of_memory_error_metaspace_errors); |
| } else if (exception() == Universe::out_of_memory_error_class_metaspace()) { |
| Atomic::inc(&_out_of_memory_error_class_metaspace_errors); |
| } else { |
| // everything else reported as java heap OOM |
| Atomic::inc(&_out_of_memory_error_java_heap_errors); |
| } |
| } |
| |
| void print_oom_count(outputStream* st, const char *err, int count) { |
| if (count > 0) { |
| st->print_cr("OutOfMemoryError %s=%d", err, count); |
| } |
| } |
| |
| bool Exceptions::has_exception_counts() { |
| return (_stack_overflow_errors + _out_of_memory_error_java_heap_errors + |
| _out_of_memory_error_metaspace_errors + _out_of_memory_error_class_metaspace_errors) > 0; |
| } |
| |
| void Exceptions::print_exception_counts_on_error(outputStream* st) { |
| print_oom_count(st, "java_heap_errors", _out_of_memory_error_java_heap_errors); |
| print_oom_count(st, "metaspace_errors", _out_of_memory_error_metaspace_errors); |
| print_oom_count(st, "class_metaspace_errors", _out_of_memory_error_class_metaspace_errors); |
| if (_stack_overflow_errors > 0) { |
| st->print_cr("StackOverflowErrors=%d", _stack_overflow_errors); |
| } |
| } |
| |
| // 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); |
| } |
| } |
| } |
| |
| // ---------------------------------------------------------------------------------------- |
| |
| // caller frees value_string if necessary |
| void Exceptions::debug_check_abort(const char *value_string, const char* message) { |
| if (AbortVMOnException != NULL && value_string != NULL && |
| strstr(value_string, AbortVMOnException)) { |
| if (AbortVMOnExceptionMessage == NULL || (message != NULL && |
| strstr(message, AbortVMOnExceptionMessage))) { |
| fatal("Saw %s, aborting", value_string); |
| } |
| } |
| } |
| |
| void Exceptions::debug_check_abort(Handle exception, const char* message) { |
| if (AbortVMOnException != NULL) { |
| debug_check_abort_helper(exception, message); |
| } |
| } |
| |
| void Exceptions::debug_check_abort_helper(Handle exception, const char* message) { |
| ResourceMark rm; |
| if (message == NULL && exception->is_a(SystemDictionary::Throwable_klass())) { |
| oop msg = java_lang_Throwable::message(exception); |
| if (msg != NULL) { |
| message = java_lang_String::as_utf8_string(msg); |
| } |
| } |
| debug_check_abort(exception()->klass()->external_name(), message); |
| } |
| |
| // for logging exceptions |
| void Exceptions::log_exception(Handle exception, stringStream tempst) { |
| ResourceMark rm; |
| Symbol* message = java_lang_Throwable::detail_message(exception()); |
| if (message != NULL) { |
| log_info(exceptions)("Exception <%s: %s> (" INTPTR_FORMAT ")\n thrown in %s", |
| exception->print_value_string(), |
| message->as_C_string(), p2i(exception()), tempst.as_string()); |
| } else { |
| log_info(exceptions)("Exception <%s> (" INTPTR_FORMAT ")\n thrown in %s", |
| exception->print_value_string(), |
| p2i(exception()), tempst.as_string()); |
| } |
| } |