--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/utilities/exceptions.cpp Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,388 @@
+/*
+ * Copyright 1998-2007 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.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) {
+ 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> (" INTPTR_FORMAT " ) \nthrown [%s, line %d]\nfor thread " INTPTR_FORMAT,
+ h_exception->print_value_string(), (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);
+}
+
+// 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);
+}
+
+// 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)) {
+ fatal1("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