// prims.cc - Code for core of runtime environment.
-/* Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation
+/* Copyright (C) 1998, 1999, 2000, 2001, 2002 Free Software Foundation
This file is part of libgcj.
details. */
#include <config.h>
-
-#ifdef USE_WIN32_SIGNALLING
-#include <windows.h>
-#endif /* USE_WIN32_SIGNALLING */
-
-#ifdef USE_WINSOCK
-#undef __INSIDE_CYGWIN__
-#include <winsock.h>
-#endif /* USE_WINSOCK */
+#include <platform.h>
#include <stdlib.h>
#include <stdarg.h>
#include <java/lang/String.h>
#include <java/lang/Thread.h>
#include <java/lang/ThreadGroup.h>
-#include <gnu/gcj/runtime/FirstThread.h>
#include <java/lang/ArrayIndexOutOfBoundsException.h>
#include <java/lang/ArithmeticException.h>
#include <java/lang/ClassFormatError.h>
+#include <java/lang/InternalError.h>
#include <java/lang/NegativeArraySizeException.h>
#include <java/lang/NullPointerException.h>
#include <java/lang/OutOfMemoryError.h>
#include <java/lang/reflect/Modifier.h>
#include <java/io/PrintStream.h>
#include <java/lang/UnsatisfiedLinkError.h>
+#include <java/lang/VirtualMachineError.h>
+#include <gnu/gcj/runtime/VMClassLoader.h>
+#include <gnu/gcj/runtime/FinalizerThread.h>
+#include <gnu/gcj/runtime/FirstThread.h>
#ifdef USE_LTDL
#include <ltdl.h>
#endif
// The name of this executable.
-static char * _Jv_execName;
+static char *_Jv_execName;
// Stash the argv pointer to benefit native libraries that need it.
const char **_Jv_argv;
int _Jv_argc;
-typedef void main_func (jobject);
-
#ifdef ENABLE_JVMPI
// Pointer to JVMPI notification functions.
void (*_Jv_JVMPI_Notify_OBJECT_ALLOC) (JVMPI_Event *event);
if (len < 0)
len = strlen (s);
Utf8Const* m = (Utf8Const*) _Jv_AllocBytes (sizeof(Utf8Const) + len + 1);
- if (! m)
- throw no_memory;
memcpy (m->data, s, len);
m->data[len] = 0;
m->length = len;
"libgcj failure: %s\n in function %s, file %s, line %d\n",
message, function, file, line);
#else
- java::io::PrintStream *err = java::lang::System::err;
- err->print(JvNewStringLatin1 ("libgcj failure: "));
- err->println(JvNewStringLatin1 (message));
- err->flush();
+ fprintf (stderr, "libgcj failure: %s\n", message);
#endif
abort ();
}
// The collector calls this when it encounters an out-of-memory condition.
void _Jv_ThrowNoMemory()
{
- _Jv_Throw (no_memory);
+ throw no_memory;
}
-// Allocate a new object of class KLASS. SIZE is the size of the object
-// to allocate. You might think this is redundant, but it isn't; some
-// classes, such as String, aren't of fixed size.
-jobject
-_Jv_AllocObject (jclass klass, jint size)
-{
- _Jv_InitClass (klass);
-
- jobject obj = (jobject) _Jv_AllocObj (size, klass);
-
- // If this class has inherited finalize from Object, then don't
- // bother registering a finalizer. We know that finalize() is the
- // very first method after the dummy entry. If this turns out to be
- // unreliable, a more robust implementation can be written. Such an
- // implementation would look for Object.finalize in Object's method
- // table at startup, and then use that information to find the
- // appropriate index in the method vector.
- if (klass->vtable->get_finalizer()
- != java::lang::Object::class$.vtable->get_finalizer())
- _Jv_RegisterFinalizer (obj, _Jv_FinalizeObject);
-
#ifdef ENABLE_JVMPI
- // Service JVMPI request.
-
+static void
+jvmpi_notify_alloc(jclass klass, jint size, jobject obj)
+{
+ // Service JVMPI allocation request.
if (__builtin_expect (_Jv_JVMPI_Notify_OBJECT_ALLOC != 0, false))
{
JVMPI_Event event;
(*_Jv_JVMPI_Notify_OBJECT_ALLOC) (&event);
_Jv_EnableGC ();
}
+}
+#else /* !ENABLE_JVMPI */
+# define jvmpi_notify_alloc(klass,size,obj) /* do nothing */
#endif
+// Allocate a new object of class KLASS. SIZE is the size of the object
+// to allocate. You might think this is redundant, but it isn't; some
+// classes, such as String, aren't of fixed size.
+// First a version that assumes that we have no finalizer, and that
+// the class is already initialized.
+// If we know that JVMPI is disabled, this can be replaced by a direct call
+// to the allocator for the appropriate GC.
+jobject
+_Jv_AllocObjectNoInitNoFinalizer (jclass klass, jint size)
+{
+ jobject obj = (jobject) _Jv_AllocObj (size, klass);
+ jvmpi_notify_alloc (klass, size, obj);
+ return obj;
+}
+
+// And now a version that initializes if necessary.
+jobject
+_Jv_AllocObjectNoFinalizer (jclass klass, jint size)
+{
+ _Jv_InitClass (klass);
+ jobject obj = (jobject) _Jv_AllocObj (size, klass);
+ jvmpi_notify_alloc (klass, size, obj);
+ return obj;
+}
+
+// And now the general version that registers a finalizer if necessary.
+jobject
+_Jv_AllocObject (jclass klass, jint size)
+{
+ jobject obj = _Jv_AllocObjectNoFinalizer (klass, size);
+
+ // We assume that the compiler only generates calls to this routine
+ // if there really is an interesting finalizer.
+ // Unfortunately, we still have to the dynamic test, since there may
+ // be cni calls to this routine.
+ // Nore that on IA64 get_finalizer() returns the starting address of the
+ // function, not a function pointer. Thus this still works.
+ if (klass->vtable->get_finalizer ()
+ != java::lang::Object::class$.vtable->get_finalizer ())
+ _Jv_RegisterFinalizer (obj, _Jv_FinalizeObject);
return obj;
}
case 10: return JvNewIntArray (size);
case 11: return JvNewLongArray (size);
}
- JvFail ("newarray - bad type code");
- return NULL; // Placate compiler.
+ throw new java::lang::InternalError
+ (JvNewStringLatin1 ("invalid type code in _Jv_NewArray"));
}
-jobject
-_Jv_NewMultiArray (jclass type, jint dimensions, jint *sizes)
+// Allocate a possibly multi-dimensional array but don't check that
+// any array length is <0.
+static jobject
+_Jv_NewMultiArrayUnchecked (jclass type, jint dimensions, jint *sizes)
{
JvAssert (type->isArray());
jclass element_type = type->getComponentType();
JvAssert (element_type->isArray());
jobject *contents = elements ((jobjectArray) result);
for (int i = 0; i < sizes[0]; ++i)
- contents[i] = _Jv_NewMultiArray (element_type, dimensions - 1,
- sizes + 1);
+ contents[i] = _Jv_NewMultiArrayUnchecked (element_type, dimensions - 1,
+ sizes + 1);
}
return result;
}
jobject
+_Jv_NewMultiArray (jclass type, jint dimensions, jint *sizes)
+{
+ for (int i = 0; i < dimensions; ++i)
+ if (sizes[i] < 0)
+ throw new java::lang::NegativeArraySizeException;
+
+ return _Jv_NewMultiArrayUnchecked (type, dimensions, sizes);
+}
+
+jobject
_Jv_NewMultiArray (jclass array_type, jint dimensions, ...)
{
va_list args;
for (int i = 0; i < dimensions; ++i)
{
jint size = va_arg (args, jint);
+ if (size < 0)
+ throw new java::lang::NegativeArraySizeException;
sizes[i] = size;
}
va_end (args);
- return _Jv_NewMultiArray (array_type, dimensions, sizes);
+ return _Jv_NewMultiArrayUnchecked (array_type, dimensions, sizes);
}
\f
-#define DECLARE_PRIM_TYPE(NAME, SIG, LEN) \
- _Jv_ArrayVTable _Jv_##NAME##VTable; \
- java::lang::Class _Jv_##NAME##Class ((jobject) #NAME, \
- (jbyte) SIG, (jint) LEN, \
- (jobject) &_Jv_##NAME##VTable);
-
-DECLARE_PRIM_TYPE(byte, 'B', 1);
-DECLARE_PRIM_TYPE(short, 'S', 2);
-DECLARE_PRIM_TYPE(int, 'I', 4);
-DECLARE_PRIM_TYPE(long, 'J', 8);
-DECLARE_PRIM_TYPE(boolean, 'Z', 1);
-DECLARE_PRIM_TYPE(char, 'C', 2);
-DECLARE_PRIM_TYPE(float, 'F', 4);
-DECLARE_PRIM_TYPE(double, 'D', 8);
-DECLARE_PRIM_TYPE(void, 'V', 0);
+// Ensure 8-byte alignment, for hash synchronization.
+#define DECLARE_PRIM_TYPE(NAME) \
+ _Jv_ArrayVTable _Jv_##NAME##VTable; \
+ java::lang::Class _Jv_##NAME##Class __attribute__ ((aligned (8)));
+
+DECLARE_PRIM_TYPE(byte);
+DECLARE_PRIM_TYPE(short);
+DECLARE_PRIM_TYPE(int);
+DECLARE_PRIM_TYPE(long);
+DECLARE_PRIM_TYPE(boolean);
+DECLARE_PRIM_TYPE(char);
+DECLARE_PRIM_TYPE(float);
+DECLARE_PRIM_TYPE(double);
+DECLARE_PRIM_TYPE(void);
+
+void
+_Jv_InitPrimClass (jclass cl, char *cname, char sig, int len,
+ _Jv_ArrayVTable *array_vtable)
+{
+ using namespace java::lang::reflect;
+
+ _Jv_InitNewClassFields (cl);
+
+ // We must set the vtable for the class; the Java constructor
+ // doesn't do this.
+ (*(_Jv_VTable **) cl) = java::lang::Class::class$.vtable;
+
+ // Initialize the fields we care about. We do this in the same
+ // order they are declared in Class.h.
+ cl->name = _Jv_makeUtf8Const ((char *) cname, -1);
+ cl->accflags = Modifier::PUBLIC | Modifier::FINAL | Modifier::ABSTRACT;
+ cl->method_count = sig;
+ cl->size_in_bytes = len;
+ cl->vtable = JV_PRIMITIVE_VTABLE;
+ cl->state = JV_STATE_DONE;
+ cl->depth = -1;
+ if (sig != 'V')
+ _Jv_NewArrayClass (cl, NULL, (_Jv_VTable *) array_vtable);
+}
jclass
_Jv_FindClassFromSignature (char *sig, java::lang::ClassLoader *loader)
if (argc < 0)
argc = 0;
jobjectArray ar = JvNewObjectArray(argc, &StringClass, NULL);
- jobject* ptr = elements(ar);
+ jobject *ptr = elements(ar);
+ jbyteArray bytes = NULL;
for (int i = 0; i < argc; i++)
{
const char *arg = argv[i];
- // FIXME - should probably use JvNewStringUTF.
- *ptr++ = JvNewStringLatin1(arg, strlen(arg));
+ int len = strlen (arg);
+ if (bytes == NULL || bytes->length < len)
+ bytes = JvNewByteArray (len);
+ jbyte *bytePtr = elements (bytes);
+ // We assume jbyte == char.
+ memcpy (bytePtr, arg, len);
+
+ // Now convert using the default encoding.
+ *ptr++ = new java::lang::String (bytes, 0, len);
}
return (JArray<jstring>*) ar;
}
// it will only scan the qthreads stacks.
// Command line arguments.
-static jobject arg_vec;
+static JArray<jstring> *arg_vec;
// The primary thread.
static java::lang::Thread *main_thread;
}
}
-#ifdef USE_WIN32_SIGNALLING
-
-extern "C" int* win32_get_restart_frame (void *);
-
-LONG CALLBACK
-win32_exception_handler (LPEXCEPTION_POINTERS e)
-{
- int* setjmp_buf;
- if (e->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION)
- setjmp_buf = win32_get_restart_frame (nullp);
- else if (e->ExceptionRecord->ExceptionCode == EXCEPTION_INT_DIVIDE_BY_ZERO)
- setjmp_buf = win32_get_restart_frame (arithexception);
- else
- return EXCEPTION_CONTINUE_SEARCH;
-
- e->ContextRecord->Ebp = setjmp_buf[0];
- // FIXME: Why does i386-signal.h increment the PC here, do we need to do it?
- e->ContextRecord->Eip = setjmp_buf[1];
- // FIXME: Is this the stack pointer? Do we need it?
- e->ContextRecord->Esp = setjmp_buf[2];
-
- return EXCEPTION_CONTINUE_EXECUTION;
-}
-
-#endif
-
-
#ifndef DISABLE_GETENV_PROPERTIES
static char *
}
#endif // DISABLE_GETENV_PROPERTIES
+namespace gcj
+{
+ _Jv_Utf8Const *void_signature;
+ _Jv_Utf8Const *clinit_name;
+ _Jv_Utf8Const *init_name;
+ _Jv_Utf8Const *finit_name;
+
+ bool runtimeInitialized = false;
+}
+
jint
_Jv_CreateJavaVM (void* /*vm_args*/)
{
+ using namespace gcj;
+
+ if (runtimeInitialized)
+ return -1;
+
+ runtimeInitialized = true;
+
PROCESS_GCJ_PROPERTIES;
+ _Jv_InitThreads ();
+ _Jv_InitGC ();
+ _Jv_InitializeSyncMutex ();
+
+ /* Initialize Utf8 constants declared in jvm.h. */
+ void_signature = _Jv_makeUtf8Const ("()V", 3);
+ clinit_name = _Jv_makeUtf8Const ("<clinit>", 8);
+ init_name = _Jv_makeUtf8Const ("<init>", 6);
+ finit_name = _Jv_makeUtf8Const ("finit$", 6);
+
+ /* Initialize built-in classes to represent primitive TYPEs. */
+ _Jv_InitPrimClass (&_Jv_byteClass, "byte", 'B', 1, &_Jv_byteVTable);
+ _Jv_InitPrimClass (&_Jv_shortClass, "short", 'S', 2, &_Jv_shortVTable);
+ _Jv_InitPrimClass (&_Jv_intClass, "int", 'I', 4, &_Jv_intVTable);
+ _Jv_InitPrimClass (&_Jv_longClass, "long", 'J', 8, &_Jv_longVTable);
+ _Jv_InitPrimClass (&_Jv_booleanClass, "boolean", 'Z', 1, &_Jv_booleanVTable);
+ _Jv_InitPrimClass (&_Jv_charClass, "char", 'C', 2, &_Jv_charVTable);
+ _Jv_InitPrimClass (&_Jv_floatClass, "float", 'F', 4, &_Jv_floatVTable);
+ _Jv_InitPrimClass (&_Jv_doubleClass, "double", 'D', 8, &_Jv_doubleVTable);
+ _Jv_InitPrimClass (&_Jv_voidClass, "void", 'V', 0, &_Jv_voidVTable);
+
// Turn stack trace generation off while creating exception objects.
_Jv_InitClass (&java::lang::Throwable::class$);
java::lang::Throwable::trace_enabled = 0;
LTDL_SET_PRELOADED_SYMBOLS ();
#endif
-#ifdef USE_WINSOCK
- // Initialise winsock for networking
- WSADATA data;
- if (WSAStartup (MAKEWORD (1, 1), &data))
- MessageBox (NULL, "Error initialising winsock library.", "Error", MB_OK | MB_ICONEXCLAMATION);
-#endif /* USE_WINSOCK */
-
-#ifdef USE_WIN32_SIGNALLING
- // Install exception handler
- SetUnhandledExceptionFilter (win32_exception_handler);
-#elif defined(HAVE_SIGACTION)
- // We only want this on POSIX systems.
- struct sigaction act;
- act.sa_handler = SIG_IGN;
- sigemptyset (&act.sa_mask);
- act.sa_flags = 0;
- sigaction (SIGPIPE, &act, NULL);
-#else
- signal (SIGPIPE, SIG_IGN);
-#endif
+ _Jv_platform_initialize ();
_Jv_JNI_Init ();
- return 0;
-}
+ _Jv_GCInitializeFinalizers (&::gnu::gcj::runtime::FinalizerThread::finalizerReady);
-static void
-runFirst (::java::lang::Class *klass, ::java::lang::Object *args)
-{
- Utf8Const* main_signature = _Jv_makeUtf8Const ("([Ljava.lang.String;)V", 22);
- Utf8Const* main_name = _Jv_makeUtf8Const ("main", 4);
-
- _Jv_Method *meth = _Jv_GetMethodLocal (klass, main_name, main_signature);
-
- // Some checks from Java Spec section 12.1.4.
- const char *msg = NULL;
- if (meth == NULL)
- msg = "no suitable method `main' in class";
- else if (! java::lang::reflect::Modifier::isStatic(meth->accflags))
- msg = "`main' must be static";
- else if (! java::lang::reflect::Modifier::isPublic(meth->accflags))
- msg = "`main' must be public";
- if (msg != NULL)
+ // Start the GC finalizer thread. A VirtualMachineError can be
+ // thrown by the runtime if, say, threads aren't available. In this
+ // case finalizers simply won't run.
+ try
{
- fprintf (stderr, "%s\n", msg);
- ::exit(1);
+ using namespace gnu::gcj::runtime;
+ FinalizerThread *ft = new FinalizerThread ();
+ ft->start ();
}
-
-#ifdef WITH_JVMPI
- if (_Jv_JVMPI_Notify_THREAD_START)
+ catch (java::lang::VirtualMachineError *ignore)
{
- JVMPI_Event event;
-
- jstring thread_name = getName ();
- jstring group_name = NULL, parent_name = NULL;
- java::lang::ThreadGroup *group = getThreadGroup ();
-
- if (group)
- {
- group_name = group->getName ();
- group = group->getParent ();
-
- if (group)
- parent_name = group->getName ();
- }
-
- int thread_len = thread_name ? JvGetStringUTFLength (thread_name) : 0;
- int group_len = group_name ? JvGetStringUTFLength (group_name) : 0;
- int parent_len = parent_name ? JvGetStringUTFLength (parent_name) : 0;
-
- char thread_chars[thread_len + 1];
- char group_chars[group_len + 1];
- char parent_chars[parent_len + 1];
-
- if (thread_name)
- JvGetStringUTFRegion (thread_name, 0,
- thread_name->length(), thread_chars);
- if (group_name)
- JvGetStringUTFRegion (group_name, 0,
- group_name->length(), group_chars);
- if (parent_name)
- JvGetStringUTFRegion (parent_name, 0,
- parent_name->length(), parent_chars);
-
- thread_chars[thread_len] = '\0';
- group_chars[group_len] = '\0';
- parent_chars[parent_len] = '\0';
-
- event.event_type = JVMPI_EVENT_THREAD_START;
- event.env_id = NULL;
- event.u.thread_start.thread_name = thread_chars;
- event.u.thread_start.group_name = group_chars;
- event.u.thread_start.parent_name = parent_chars;
- event.u.thread_start.thread_id = (jobjectID) this;
- event.u.thread_start.thread_env_id = _Jv_GetCurrentJNIEnv ();
-
- _Jv_DisableGC ();
- (*_Jv_JVMPI_Notify_THREAD_START) (&event);
- _Jv_EnableGC ();
}
-#endif
- main_func *real_main = (main_func *) meth->ncode;
- (*real_main) (args);
+ return 0;
}
void
-JvRunMain (jclass klass, int argc, const char **argv)
+_Jv_RunMain (jclass klass, const char *name, int argc, const char **argv,
+ bool is_jar)
{
_Jv_argv = argv;
_Jv_argc = argc;
- _Jv_CreateJavaVM (NULL);
+ java::lang::Runtime *runtime = NULL;
+
+
+#ifdef DISABLE_MAIN_ARGS
+ _Jv_ThisExecutable ("[Embedded App]");
+#else
#ifdef HAVE_PROC_SELF_EXE
char exec_name[20];
sprintf (exec_name, "/proc/%d/exe", getpid ());
_Jv_ThisExecutable (exec_name);
#else
_Jv_ThisExecutable (argv[0]);
+#endif /* HAVE_PROC_SELF_EXE */
+#endif /* DISABLE_MAIN_ARGS */
+
+ try
+ {
+ // Set this very early so that it is seen when java.lang.System
+ // is initialized.
+ if (is_jar)
+ _Jv_Jar_Class_Path = strdup (name);
+ _Jv_CreateJavaVM (NULL);
+
+ // Get the Runtime here. We want to initialize it before searching
+ // for `main'; that way it will be set up if `main' is a JNI method.
+ runtime = java::lang::Runtime::getRuntime ();
+
+#ifdef DISABLE_MAIN_ARGS
+ arg_vec = JvConvertArgv (0, 0);
+#else
+ arg_vec = JvConvertArgv (argc - 1, argv + 1);
#endif
- // Get the Runtime here. We want to initialize it before searching
- // for `main'; that way it will be set up if `main' is a JNI method.
- java::lang::Runtime *rtime = java::lang::Runtime::getRuntime ();
+ using namespace gnu::gcj::runtime;
+ if (klass)
+ main_thread = new FirstThread (klass, arg_vec);
+ else
+ main_thread = new FirstThread (JvNewStringLatin1 (name),
+ arg_vec, is_jar);
+ }
+ catch (java::lang::Throwable *t)
+ {
+ java::lang::System::err->println (JvNewStringLatin1
+ ("Exception during runtime initialization"));
+ t->printStackTrace();
+ runtime->exit (1);
+ }
- main_thread = _Jv_AttachCurrentThread (JvNewStringLatin1 ("main"), NULL);
- arg_vec = JvConvertArgv (argc - 1, argv + 1);
- runFirst (klass, arg_vec);
+ _Jv_AttachCurrentThread (main_thread);
+ _Jv_ThreadRun (main_thread);
_Jv_ThreadWait ();
int status = (int) java::lang::ThreadGroup::had_uncaught_exception;
-
- rtime->_exit (status);
+ runtime->exit (status);
}
void
-_Jv_RunMain (const char *name, int argc, const char **argv, bool is_jar)
+JvRunMain (jclass klass, int argc, const char **argv)
{
- jstring class_name;
-
- _Jv_CreateJavaVM (NULL);
-
-#ifdef HAVE_PROC_SELF_EXE
- char exec_name[20];
- sprintf (exec_name, "/proc/%d/exe", getpid ());
- _Jv_ThisExecutable (exec_name);
-#endif
-
- // Get the Runtime here. We want to initialize it before searching
- // for `main'; that way it will be set up if `main' is a JNI method.
- java::lang::Runtime *rtime = java::lang::Runtime::getRuntime ();
-
- main_thread = _Jv_AttachCurrentThread (JvNewStringLatin1 ("main"), NULL);
-
- if (is_jar)
- {
- // name specifies a jar file. We must now extract the
- // Main-Class attribute from the jar's manifest file.
- // This is done by gnu.gcj.runtime.FirstThread.getMain.
- _Jv_Jar_Class_Path = strdup (name);
- jstring jar_name = JvNewStringLatin1 (name);
- // FirstThread.getMain extracts the main class name.
- class_name = gnu::gcj::runtime::FirstThread::getMain (jar_name);
-
- // We need a new ClassLoader because the classpath must be the
- // jar file only. The easiest way to do this is to lose our
- // reference to the previous classloader.
- java::lang::ClassLoader::system = NULL;
- }
- else
- class_name = JvNewStringLatin1 (name);
-
- arg_vec = JvConvertArgv (argc - 1, argv + 1);
-
- if (class_name)
- {
- runFirst(java::lang::Class::forName (class_name), arg_vec);
- _Jv_ThreadWait ();
- }
-
- int status = (int) java::lang::ThreadGroup::had_uncaught_exception;
-
- rtime->exit (status);
+ _Jv_RunMain (klass, NULL, argc, argv, false);
}
\f
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