// prims.cc - Code for core of runtime environment.
-/* Copyright (C) 1998, 1999, 2000 Free Software Foundation
+/* Copyright (C) 1998, 1999, 2000, 2001, 2002, 2003, 2004 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>
#ifdef ENABLE_JVMPI
#include <jvmpi.h>
+#include <java/lang/ThreadGroup.h>
#endif
#ifndef DISABLE_GETENV_PROPERTIES
#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/System.h>
+#include <java/lang/VMThrowable.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
-// We use placement new.
-#include <new>
-
// We allocate a single OutOfMemoryError exception which we keep
// around for use if we run out of memory.
static java::lang::OutOfMemoryError *no_memory;
-// Largest representable size_t.
-#define SIZE_T_MAX ((size_t) (~ (size_t) 0))
+// Number of bytes in largest array object we create. This could be
+// increased to the largest size_t value, so long as the appropriate
+// functions are changed to take a size_t argument instead of jint.
+#define MAX_OBJECT_SIZE ((1<<31) - 1)
+
+static const char *no_properties[] = { NULL };
// Properties set at compile time.
-const char **_Jv_Compiler_Properties;
+const char **_Jv_Compiler_Properties = no_properties;
// The JAR file to add to the beginning of java.class.path.
const char *_Jv_Jar_Class_Path;
property_pair *_Jv_Environment_Properties;
#endif
-// The name of this executable.
-static char * _Jv_execName;
-
// Stash the argv pointer to benefit native libraries that need it.
const char **_Jv_argv;
int _Jv_argc;
+// Argument support.
+int
+_Jv_GetNbArgs (void)
+{
+ // _Jv_argc is 0 if not explicitly initialized.
+ return _Jv_argc;
+}
+
+const char *
+_Jv_GetSafeArg (int index)
+{
+ if (index >=0 && index < _Jv_GetNbArgs ())
+ return _Jv_argv[index];
+ else
+ return "";
+}
+
+void
+_Jv_SetArgs (int argc, const char **argv)
+{
+ _Jv_argc = argc;
+ _Jv_argv = argv;
+}
+
#ifdef ENABLE_JVMPI
// Pointer to JVMPI notification functions.
void (*_Jv_JVMPI_Notify_OBJECT_ALLOC) (JVMPI_Event *event);
#endif
\f
-extern "C" void _Jv_ThrowSignal (void *) __attribute ((noreturn));
-
-// Just like _Jv_Throw, but fill in the stack trace first. Although
-// this is declared extern in order that its name not be mangled, it
-// is not intended to be used outside this file.
-void
-_Jv_ThrowSignal (void *e)
+/* Unblock a signal. Unless we do this, the signal may only be sent
+ once. */
+static void
+unblock_signal (int signum)
{
- java::lang::Throwable *throwable = (java::lang::Throwable *)e;
- throwable->fillInStackTrace ();
- _Jv_Throw (throwable);
+#ifdef _POSIX_VERSION
+ sigset_t sigs;
+
+ sigemptyset (&sigs);
+ sigaddset (&sigs, signum);
+ sigprocmask (SIG_UNBLOCK, &sigs, NULL);
+#endif
}
-
-#ifdef HANDLE_SEGV
-static java::lang::NullPointerException *nullp;
+#ifdef HANDLE_SEGV
SIGNAL_HANDLER (catch_segv)
{
+ java::lang::NullPointerException *nullp
+ = new java::lang::NullPointerException;
+ unblock_signal (SIGSEGV);
MAKE_THROW_FRAME (nullp);
- _Jv_ThrowSignal (nullp);
+ throw nullp;
}
#endif
-static java::lang::ArithmeticException *arithexception;
-
#ifdef HANDLE_FPE
SIGNAL_HANDLER (catch_fpe)
{
+ java::lang::ArithmeticException *arithexception
+ = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
+ unblock_signal (SIGFPE);
#ifdef HANDLE_DIVIDE_OVERFLOW
HANDLE_DIVIDE_OVERFLOW;
#else
MAKE_THROW_FRAME (arithexception);
#endif
- _Jv_ThrowSignal (arithexception);
+ throw arithexception;
}
#endif
\f
jboolean
-_Jv_equalUtf8Consts (Utf8Const* a, Utf8Const *b)
+_Jv_equalUtf8Consts (const Utf8Const* a, const Utf8Const *b)
{
int len;
- _Jv_ushort *aptr, *bptr;
+ const _Jv_ushort *aptr, *bptr;
if (a == b)
return true;
if (a->hash != b->hash)
len = a->length;
if (b->length != len)
return false;
- aptr = (_Jv_ushort *)a->data;
- bptr = (_Jv_ushort *)b->data;
+ aptr = (const _Jv_ushort *)a->data;
+ bptr = (const _Jv_ushort *)b->data;
len = (len + 1) >> 1;
while (--len >= 0)
if (*aptr++ != *bptr++)
ptr = (unsigned char*) str;
limit = ptr + len;
str_length = 0;
- for (; ptr < limit; str_length++) {
- if (UTF8_GET (ptr, limit) < 0) {
- return (-1);
+ for (; ptr < limit; str_length++)
+ {
+ if (UTF8_GET (ptr, limit) < 0)
+ return (-1);
}
- }
return (str_length);
}
if (len < 0)
len = strlen (s);
Utf8Const* m = (Utf8Const*) _Jv_AllocBytes (sizeof(Utf8Const) + len + 1);
- if (! m)
- JvThrow (no_memory);
memcpy (m->data, s, len);
m->data[len] = 0;
m->length = len;
jint len = _Jv_GetStringUTFLength (string);
Utf8Const* m = (Utf8Const*)
- _Jv_AllocBytesChecked (sizeof(Utf8Const) + len + 1);
+ _Jv_AllocBytes (sizeof(Utf8Const) + len + 1);
m->hash = hash;
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 ();
}
void
_Jv_ThrowBadArrayIndex(jint bad_index)
{
- JvThrow (new java::lang::ArrayIndexOutOfBoundsException
- (java::lang::String::valueOf(bad_index)));
+ throw new java::lang::ArrayIndexOutOfBoundsException
+ (java::lang::String::valueOf (bad_index));
}
void
_Jv_ThrowNullPointerException ()
{
- throw new java::lang::NullPointerException ();
+ throw new java::lang::NullPointerException;
}
-// Allocate some unscanned memory and throw an exception if no memory.
-void *
-_Jv_AllocBytesChecked (jsize size)
+// Explicitly throw a no memory exception.
+// The collector calls this when it encounters an out-of-memory condition.
+void _Jv_ThrowNoMemory()
{
- void *r = _Jv_AllocBytes (size);
- if (! r)
- _Jv_Throw (no_memory);
- return r;
+ 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.
+#ifdef ENABLE_JVMPI
+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;
+
+ event.event_type = JVMPI_EVENT_OBJECT_ALLOC;
+ event.env_id = NULL;
+ event.u.obj_alloc.arena_id = 0;
+ event.u.obj_alloc.class_id = (jobjectID) klass;
+ event.u.obj_alloc.is_array = 0;
+ event.u.obj_alloc.size = size;
+ event.u.obj_alloc.obj_id = (jobjectID) obj;
+
+ // FIXME: This doesn't look right for the Boehm GC. A GC may
+ // already be in progress. _Jv_DisableGC () doesn't wait for it.
+ // More importantly, I don't see the need for disabling GC, since we
+ // blatantly have a pointer to obj on our stack, ensuring that the
+ // object can't be collected. Even for a nonconservative collector,
+ // it appears to me that this must be true, since we are about to
+ // return obj. Isn't this whole approach way too intrusive for
+ // a useful profiling interface? - HB
+ _Jv_DisableGC ();
+ (*_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.
+// 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_AllocObject (jclass klass, jint size)
+_Jv_AllocObjectNoInitNoFinalizer (jclass klass)
{
- _Jv_InitClass (klass);
+ jint size = klass->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)
+{
+ _Jv_InitClass (klass);
+ jint size = klass->size ();
jobject obj = (jobject) _Jv_AllocObj (size, klass);
- if (__builtin_expect (! obj, false))
- JvThrow (no_memory);
-
- // 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$.vtable->get_finalizer())
+ jvmpi_notify_alloc (klass, size, obj);
+ return obj;
+}
+
+// And now the general version that registers a finalizer if necessary.
+jobject
+_Jv_AllocObject (jclass klass)
+{
+ jobject obj = _Jv_AllocObjectNoFinalizer (klass);
+
+ // We assume that the compiler only generates calls to this routine
+ // if there really is an interesting finalizer.
+ // Unfortunately, we still have to the dynamic test, since there may
+ // be cni calls to this routine.
+ // Note that on IA64 get_finalizer() returns the starting address of the
+ // function, not a function pointer. Thus this still works.
+ if (klass->vtable->get_finalizer ()
+ != java::lang::Object::class$.vtable->get_finalizer ())
_Jv_RegisterFinalizer (obj, _Jv_FinalizeObject);
+ return obj;
+}
+
+// Allocate a String, including variable length storage.
+jstring
+_Jv_AllocString(jsize len)
+{
+ using namespace java::lang;
+
+ jsize sz = sizeof(java::lang::String) + len * sizeof(jchar);
+
+ // We assert that for strings allocated this way, the data field
+ // will always point to the object itself. Thus there is no reason
+ // for the garbage collector to scan any of it.
+ // Furthermore, we're about to overwrite the string data, so
+ // initialization of the object is not an issue.
+
+ // String needs no initialization, and there is no finalizer, so
+ // we can go directly to the collector's allocator interface.
+ jstring obj = (jstring) _Jv_AllocPtrFreeObj(sz, &String::class$);
+
+ obj->data = obj;
+ obj->boffset = sizeof(java::lang::String);
+ obj->count = len;
+ obj->cachedHashCode = 0;
+
+#ifdef ENABLE_JVMPI
+ // Service JVMPI request.
+
+ if (__builtin_expect (_Jv_JVMPI_Notify_OBJECT_ALLOC != 0, false))
+ {
+ JVMPI_Event event;
+
+ event.event_type = JVMPI_EVENT_OBJECT_ALLOC;
+ event.env_id = NULL;
+ event.u.obj_alloc.arena_id = 0;
+ event.u.obj_alloc.class_id = (jobjectID) &String::class$;
+ event.u.obj_alloc.is_array = 0;
+ event.u.obj_alloc.size = sz;
+ event.u.obj_alloc.obj_id = (jobjectID) obj;
+
+ _Jv_DisableGC ();
+ (*_Jv_JVMPI_Notify_OBJECT_ALLOC) (&event);
+ _Jv_EnableGC ();
+ }
+#endif
+
+ return obj;
+}
+
+// A version of the above that assumes the object contains no pointers,
+// and requires no finalization. This can't happen if we need pointers
+// to locks.
+#ifdef JV_HASH_SYNCHRONIZATION
+jobject
+_Jv_AllocPtrFreeObject (jclass klass)
+{
+ _Jv_InitClass (klass);
+ jint size = klass->size ();
+
+ jobject obj = (jobject) _Jv_AllocPtrFreeObj (size, klass);
#ifdef ENABLE_JVMPI
// Service JVMPI request.
return obj;
}
+#endif /* JV_HASH_SYNCHRONIZATION */
+
// Allocate a new array of Java objects. Each object is of type
// `elementClass'. `init' is used to initialize each slot in the
_Jv_NewObjectArray (jsize count, jclass elementClass, jobject init)
{
if (__builtin_expect (count < 0, false))
- JvThrow (new java::lang::NegativeArraySizeException);
+ throw new java::lang::NegativeArraySizeException;
JvAssert (! elementClass->isPrimitive ());
+ // Ensure that elements pointer is properly aligned.
jobjectArray obj = NULL;
- size_t size = (size_t) _Jv_GetArrayElementFromElementType (obj,
- elementClass);
-
+ size_t size = (size_t) elements (obj);
// Check for overflow.
if (__builtin_expect ((size_t) count >
- (SIZE_T_MAX - size) / sizeof (jobject), false))
- JvThrow (no_memory);
+ (MAX_OBJECT_SIZE - 1 - size) / sizeof (jobject), false))
+ throw no_memory;
size += count * sizeof (jobject);
- // FIXME: second argument should be "current loader" //
- jclass klass = _Jv_FindArrayClass (elementClass, 0);
+ jclass klass = _Jv_GetArrayClass (elementClass,
+ elementClass->getClassLoaderInternal());
obj = (jobjectArray) _Jv_AllocArray (size, klass);
- if (__builtin_expect (! obj, false))
- JvThrow (no_memory);
- // Use placement new to initialize length field.
- new (obj) __JArray (count);
- jobject *ptr = elements(obj);
+ // Cast away const.
+ jsize *lp = const_cast<jsize *> (&obj->length);
+ *lp = count;
// We know the allocator returns zeroed memory. So don't bother
// zeroing it again.
if (init)
{
+ jobject *ptr = elements(obj);
while (--count >= 0)
*ptr++ = init;
}
{
int elsize = eltype->size();
if (__builtin_expect (count < 0, false))
- JvThrow (new java::lang::NegativeArraySizeException ());
+ throw new java::lang::NegativeArraySizeException;
JvAssert (eltype->isPrimitive ());
jobject dummy = NULL;
// Check for overflow.
if (__builtin_expect ((size_t) count >
- (SIZE_T_MAX - size) / elsize, false))
- JvThrow (no_memory);
-
- jclass klass = _Jv_FindArrayClass (eltype, 0);
-
+ (MAX_OBJECT_SIZE - size) / elsize, false))
+ throw no_memory;
+
+ jclass klass = _Jv_GetArrayClass (eltype, 0);
+
+# ifdef JV_HASH_SYNCHRONIZATION
+ // Since the vtable is always statically allocated,
+ // these are completely pointerfree! Make sure the GC doesn't touch them.
+ __JArray *arr =
+ (__JArray*) _Jv_AllocPtrFreeObj (size + elsize * count, klass);
+ memset((char *)arr + size, 0, elsize * count);
+# else
__JArray *arr = (__JArray*) _Jv_AllocObj (size + elsize * count, klass);
- if (__builtin_expect (! arr, false))
- JvThrow (no_memory);
- // Use placement new to initialize length field.
- new (arr) __JArray (count);
// Note that we assume we are given zeroed memory by the allocator.
+# endif
+ // Cast away const.
+ jsize *lp = const_cast<jsize *> (&arr->length);
+ *lp = count;
return arr;
}
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
-class _Jv_PrimClass : public java::lang::Class
-{
-public:
- // FIXME: calling convention is weird. If we use the natural types
- // then the compiler will complain because they aren't Java types.
- _Jv_PrimClass (jobject cname, jbyte sig, jint len, jobject array_vtable)
- {
- using namespace java::lang::reflect;
-
- // We must initialize every field of the class. We do this in
- // the same order they are declared in Class.h.
- next = NULL;
- name = _Jv_makeUtf8Const ((char *) cname, -1);
- accflags = Modifier::PUBLIC | Modifier::FINAL;
- superclass = NULL;
- constants.size = 0;
- constants.tags = NULL;
- constants.data = NULL;
- methods = NULL;
- method_count = sig;
- vtable_method_count = 0;
- fields = NULL;
- size_in_bytes = len;
- field_count = 0;
- static_field_count = 0;
- vtable = JV_PRIMITIVE_VTABLE;
- interfaces = NULL;
- loader = NULL;
- interface_count = 0;
- state = JV_STATE_DONE;
- thread = NULL;
-
- // Note that we have to set `methods' to NULL.
- if (sig != 'V')
- _Jv_FindArrayClass (this, NULL, (_Jv_VTable *) array_vtable);
- }
-};
-
-// We use this to define both primitive classes and the vtables for
-// arrays of primitive classes. The latter are given names so that we
-// can refer to them from the compiler, allowing us to construct
-// arrays of primitives statically.
-#define DECLARE_PRIM_TYPE(NAME, SIG, LEN) \
- _Jv_ArrayVTable _Jv_##NAME##VTable; \
- _Jv_PrimClass _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;
+
+ // 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)
;
_Jv_Utf8Const *name = _Jv_makeUtf8Const (&sig[1], i - 1);
return _Jv_FindClass (name, loader);
-
}
case '[':
- return _Jv_FindArrayClass (_Jv_FindClassFromSignature (&sig[1], loader),
- loader);
+ {
+ jclass klass = _Jv_FindClassFromSignature (&sig[1], loader);
+ if (! klass)
+ return NULL;
+ return _Jv_GetArrayClass (klass, loader);
+ }
}
- JvFail ("couldn't understand class signature");
+
return NULL; // Placate compiler.
}
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;
-char *
-_Jv_ThisExecutable (void)
-{
- return _Jv_execName;
-}
-
-void
-_Jv_ThisExecutable (const char *name)
-{
- if (name)
- {
- _Jv_execName = new char[strlen (name) + 1];
- strcpy (_Jv_execName, name);
- }
-}
-
-#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
-
-static void
-main_init ()
-{
- INIT_SEGV;
-#ifdef HANDLE_FPE
- INIT_FPE;
-#else
- arithexception = new java::lang::ArithmeticException
- (JvNewStringLatin1 ("/ by zero"));
-#endif
-
- no_memory = new java::lang::OutOfMemoryError;
-
-#ifdef USE_LTDL
- 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);
-#else
- // 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);
-#endif /* USE_WIN32_SIGNALLING */
-
- _Jv_JNI_Init ();
-}
-
#ifndef DISABLE_GETENV_PROPERTIES
static char *
}
#endif // DISABLE_GETENV_PROPERTIES
-void
-JvRunMain (jclass klass, int argc, const char **argv)
+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_argv = argv;
- _Jv_argc = argc;
+ _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::VMThrowable::class$);
+ java::lang::VMThrowable::trace_enabled = 0;
+
+ // We have to initialize this fairly early, to avoid circular class
+ // initialization. In particular we want to start the
+ // initialization of ClassLoader before we start the initialization
+ // of VMClassLoader.
+ _Jv_InitClass (&java::lang::ClassLoader::class$);
+ // Once the bootstrap loader is in place, change it into a kind of
+ // system loader, by having it read the class path.
+ gnu::gcj::runtime::VMClassLoader::initialize();
- main_init ();
-#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]);
+ INIT_SEGV;
+#ifdef HANDLE_FPE
+ INIT_FPE;
#endif
+
+ no_memory = new java::lang::OutOfMemoryError;
- arg_vec = JvConvertArgv (argc - 1, argv + 1);
- main_thread = new gnu::gcj::runtime::FirstThread (klass, arg_vec);
+ java::lang::VMThrowable::trace_enabled = 1;
- main_thread->start();
- _Jv_ThreadWait ();
+#ifdef USE_LTDL
+ LTDL_SET_PRELOADED_SYMBOLS ();
+#endif
- int status = (int) java::lang::ThreadGroup::had_uncaught_exception;
-
- java::lang::Runtime::getRuntime ()->exit (status);
+ _Jv_platform_initialize ();
+
+ _Jv_JNI_Init ();
+
+ _Jv_GCInitializeFinalizers (&::gnu::gcj::runtime::FinalizerThread::finalizerReady);
+
+ // 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
+ {
+ using namespace gnu::gcj::runtime;
+ FinalizerThread *ft = new FinalizerThread ();
+ ft->start ();
+ }
+ catch (java::lang::VirtualMachineError *ignore)
+ {
+ }
+
+ return 0;
}
void
-_Jv_RunMain (const char *name, int argc, const char **argv, bool is_jar)
+_Jv_RunMain (jclass klass, const char *name, int argc, const char **argv,
+ bool is_jar)
{
- jstring class_name;
- PROCESS_GCJ_PROPERTIES;
+ _Jv_SetArgs (argc, argv);
- main_init ();
+ java::lang::Runtime *runtime = NULL;
-#ifdef HAVE_PROC_SELF_EXE
- char exec_name[20];
- sprintf (exec_name, "/proc/%d/exe", getpid ());
- _Jv_ThisExecutable (exec_name);
+ 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
- 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.main.
- _Jv_Jar_Class_Path = strdup (name);
- arg_vec = JvConvertArgv (1, &_Jv_Jar_Class_Path);
-
- main_thread =
- new gnu::gcj::runtime::FirstThread (&gnu::gcj::runtime::FirstThread::class$,
- arg_vec);
- main_thread->start();
- _Jv_ThreadWait ();
-
- // FirstThread.main extracts the main class name and stores it
- // here.
- class_name = gnu::gcj::runtime::FirstThread::jarMainClassName;
-
- // 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;
+ 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);
}
- else
- class_name = JvNewStringLatin1 (name);
-
- arg_vec = JvConvertArgv (argc - 1, argv + 1);
-
- if (class_name)
+ catch (java::lang::Throwable *t)
{
- main_thread = new gnu::gcj::runtime::FirstThread (class_name, arg_vec);
- main_thread->start();
- _Jv_ThreadWait ();
+ java::lang::System::err->println (JvNewStringLatin1
+ ("Exception during runtime initialization"));
+ t->printStackTrace();
+ runtime->exit (1);
}
+ _Jv_AttachCurrentThread (main_thread);
+ _Jv_ThreadRun (main_thread);
+ _Jv_ThreadWait ();
+
int status = (int) java::lang::ThreadGroup::had_uncaught_exception;
+ runtime->exit (status);
+}
- java::lang::Runtime::getRuntime ()->exit (status);
+void
+JvRunMain (jclass klass, int argc, const char **argv)
+{
+ _Jv_RunMain (klass, NULL, argc, argv, false);
}
\f
size = 1;
void *ptr = malloc ((size_t) size);
if (__builtin_expect (ptr == NULL, false))
- JvThrow (no_memory);
+ throw no_memory;
return ptr;
}
size = 1;
ptr = realloc (ptr, (size_t) size);
if (__builtin_expect (ptr == NULL, false))
- JvThrow (no_memory);
+ throw no_memory;
return ptr;
}
_Jv_divI (jint dividend, jint divisor)
{
if (__builtin_expect (divisor == 0, false))
- _Jv_ThrowSignal (arithexception);
+ {
+ java::lang::ArithmeticException *arithexception
+ = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
+ throw arithexception;
+ }
if (dividend == (jint) 0x80000000L && divisor == -1)
return dividend;
_Jv_remI (jint dividend, jint divisor)
{
if (__builtin_expect (divisor == 0, false))
- _Jv_ThrowSignal (arithexception);
+ {
+ java::lang::ArithmeticException *arithexception
+ = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
+ throw arithexception;
+ }
if (dividend == (jint) 0x80000000L && divisor == -1)
return 0;
-
+
return dividend % divisor;
}
_Jv_divJ (jlong dividend, jlong divisor)
{
if (__builtin_expect (divisor == 0, false))
- _Jv_ThrowSignal (arithexception);
-
+ {
+ java::lang::ArithmeticException *arithexception
+ = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
+ throw arithexception;
+ }
+
if (dividend == (jlong) 0x8000000000000000LL && divisor == -1)
return dividend;
_Jv_remJ (jlong dividend, jlong divisor)
{
if (__builtin_expect (divisor == 0, false))
- _Jv_ThrowSignal (arithexception);
-
+ {
+ java::lang::ArithmeticException *arithexception
+ = new java::lang::ArithmeticException (JvNewStringLatin1 ("/ by zero"));
+ throw arithexception;
+ }
+
if (dividend == (jlong) 0x8000000000000000LL && divisor == -1)
return 0;
return dividend % divisor;
}
+
+\f
+
+// Return true if SELF_KLASS can access a field or method in
+// OTHER_KLASS. The field or method's access flags are specified in
+// FLAGS.
+jboolean
+_Jv_CheckAccess (jclass self_klass, jclass other_klass, jint flags)
+{
+ using namespace java::lang::reflect;
+ return ((self_klass == other_klass)
+ || ((flags & Modifier::PUBLIC) != 0)
+ || (((flags & Modifier::PROTECTED) != 0)
+ && other_klass->isAssignableFrom (self_klass))
+ || (((flags & Modifier::PRIVATE) == 0)
+ && _Jv_ClassNameSamePackage (self_klass->name,
+ other_klass->name)));
+}
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