// prims.cc - Code for core of runtime environment.
-/* Copyright (C) 1998, 1999, 2000, 2001 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>
#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>
// 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 };
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 (jthrowable) __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 (jthrowable throwable)
+/* Unblock a signal. Unless we do this, the signal may only be sent
+ once. */
+static void
+unblock_signal (int signum)
{
- throwable->fillInStackTrace ();
- 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++)
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;
// 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$.vtable->get_finalizer())
- _Jv_RegisterFinalizer (obj, _Jv_FinalizeObject);
-
#ifdef ENABLE_JVMPI
- // Service JVMPI request.
-
+static void
+jvmpi_notify_alloc(jclass klass, jint size, jobject obj)
+{
+ // Service JVMPI allocation request.
if (__builtin_expect (_Jv_JVMPI_Notify_OBJECT_ALLOC != 0, false))
{
JVMPI_Event event;
(*_Jv_JVMPI_Notify_OBJECT_ALLOC) (&event);
_Jv_EnableGC ();
}
+}
+#else /* !ENABLE_JVMPI */
+# define jvmpi_notify_alloc(klass,size,obj) /* do nothing */
#endif
+// Allocate a new object of class KLASS. SIZE is the size of the object
+// to allocate. You might think this is redundant, but it isn't; some
+// classes, such as String, aren't of fixed size.
+// First a version that assumes that we have no finalizer, and that
+// the class is already initialized.
+// If we know that JVMPI is disabled, this can be replaced by a direct call
+// to the allocator for the appropriate GC.
+jobject
+_Jv_AllocObjectNoInitNoFinalizer (jclass klass, jint size)
+{
+ jobject obj = (jobject) _Jv_AllocObj (size, klass);
+ jvmpi_notify_alloc (klass, size, obj);
+ return obj;
+}
+
+// And now a version that initializes if necessary.
+jobject
+_Jv_AllocObjectNoFinalizer (jclass klass, jint size)
+{
+ _Jv_InitClass (klass);
+ jobject obj = (jobject) _Jv_AllocObj (size, klass);
+ jvmpi_notify_alloc (klass, size, obj);
+ return obj;
+}
+
+// And now the general version that registers a finalizer if necessary.
+jobject
+_Jv_AllocObject (jclass klass, jint size)
+{
+ jobject obj = _Jv_AllocObjectNoFinalizer (klass, size);
+
+ // We assume that the compiler only generates calls to this routine
+ // if there really is an interesting finalizer.
+ // Unfortunately, we still have to the dynamic test, since there may
+ // be cni calls to this routine.
+ // Note that on IA64 get_finalizer() returns the starting address of the
+ // function, not a function pointer. Thus this still works.
+ if (klass->vtable->get_finalizer ()
+ != java::lang::Object::class$.vtable->get_finalizer ())
+ _Jv_RegisterFinalizer (obj, _Jv_FinalizeObject);
return obj;
}
// Ensure that elements pointer is properly aligned.
jobjectArray obj = NULL;
size_t size = (size_t) elements (obj);
+ // Check for overflow.
+ if (__builtin_expect ((size_t) count >
+ (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_GetArrayClass (elementClass, 0);
+ jclass klass = _Jv_GetArrayClass (elementClass,
+ elementClass->getClassLoaderInternal());
obj = (jobjectArray) _Jv_AllocArray (size, klass);
// Cast away const.
// Check for overflow.
if (__builtin_expect ((size_t) count >
- (SIZE_T_MAX - size) / elsize, false))
+ (MAX_OBJECT_SIZE - size) / elsize, false))
throw no_memory;
jclass klass = _Jv_GetArrayClass (eltype, 0);
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"));
}
// Allocate a possibly multi-dimensional array but don't check that
\f
+// Ensure 8-byte alignment, for hash synchronization.
#define DECLARE_PRIM_TYPE(NAME) \
_Jv_ArrayVTable _Jv_##NAME##VTable; \
- java::lang::Class _Jv_##NAME##Class;
-
-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);
+ 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,
{
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, except for fields that
- // are initialized to NULL.
+ // We must set the vtable for the class; the Java constructor
+ // doesn't do this.
+ (*(_Jv_VTable **) cl) = java::lang::Class::class$.vtable;
+
+ // Initialize the fields we care about. We do this in the same
+ // order they are declared in Class.h.
cl->name = _Jv_makeUtf8Const ((char *) cname, -1);
cl->accflags = Modifier::PUBLIC | Modifier::FINAL | Modifier::ABSTRACT;
cl->method_count = sig;
;
_Jv_Utf8Const *name = _Jv_makeUtf8Const (&sig[1], i - 1);
return _Jv_FindClass (name, loader);
-
}
case '[':
{
// The primary thread.
static java::lang::Thread *main_thread;
-char *
-_Jv_ThisExecutable (void)
-{
- return _Jv_execName;
-}
-
-void
-_Jv_ThisExecutable (const char *name)
-{
- if (name)
- {
- _Jv_execName = (char *) _Jv_Malloc (strlen (name) + 1);
- strcpy (_Jv_execName, name);
- }
-}
-
-#ifdef USE_WIN32_SIGNALLING
-
-extern "C" int* win32_get_restart_frame (void *);
-
-LONG CALLBACK
-win32_exception_handler (LPEXCEPTION_POINTERS e)
-{
- int* setjmp_buf;
- if (e->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION)
- setjmp_buf = win32_get_restart_frame (nullp);
- else if (e->ExceptionRecord->ExceptionCode == EXCEPTION_INT_DIVIDE_BY_ZERO)
- setjmp_buf = win32_get_restart_frame (arithexception);
- else
- return EXCEPTION_CONTINUE_SEARCH;
-
- e->ContextRecord->Ebp = setjmp_buf[0];
- // FIXME: Why does i386-signal.h increment the PC here, do we need to do it?
- e->ContextRecord->Eip = setjmp_buf[1];
- // FIXME: Is this the stack pointer? Do we need it?
- e->ContextRecord->Esp = setjmp_buf[2];
-
- return EXCEPTION_CONTINUE_EXECUTION;
-}
-
-#endif
-
#ifndef DISABLE_GETENV_PROPERTIES
static char *
_Jv_InitPrimClass (&_Jv_voidClass, "void", 'V', 0, &_Jv_voidVTable);
// Turn stack trace generation off while creating exception objects.
- _Jv_InitClass (&java::lang::Throwable::class$);
- java::lang::Throwable::trace_enabled = 0;
+ _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();
+
INIT_SEGV;
#ifdef HANDLE_FPE
INIT_FPE;
-#else
- arithexception = new java::lang::ArithmeticException
- (JvNewStringLatin1 ("/ by zero"));
#endif
-
+
no_memory = new java::lang::OutOfMemoryError;
- java::lang::Throwable::trace_enabled = 1;
+ java::lang::VMThrowable::trace_enabled = 1;
#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);
-#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 ();
_Jv_RunMain (jclass klass, const char *name, int argc, const char **argv,
bool is_jar)
{
- _Jv_argv = argv;
- _Jv_argc = argc;
+ _Jv_SetArgs (argc, argv);
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);
-#else
- _Jv_ThisExecutable (argv[0]);
-#endif
-
try
{
// Set this very early so that it is seen when java.lang.System
// 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
using namespace gnu::gcj::runtime;
if (klass)
_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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