// prims.cc - Code for core of runtime environment.
-/* Copyright (C) 1998, 1999, 2000 Free Software Foundation
+/* Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation
This file is part of libgcj.
#ifdef ENABLE_JVMPI
#include <jvmpi.h>
+#include <java/lang/ThreadGroup.h>
#endif
#ifndef DISABLE_GETENV_PROPERTIES
#endif // DISABLE_GETENV_PROPERTIES
#include <java/lang/Class.h>
+#include <java/lang/ClassLoader.h>
#include <java/lang/Runtime.h>
#include <java/lang/String.h>
#include <java/lang/Thread.h>
#include <java/lang/System.h>
#include <java/lang/reflect/Modifier.h>
#include <java/io/PrintStream.h>
+#include <java/lang/UnsatisfiedLinkError.h>
#ifdef USE_LTDL
#include <ltdl.h>
#endif
-#define ObjectClass _CL_Q34java4lang6Object
-extern java::lang::Class ObjectClass;
-
// 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))
+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;
#ifndef DISABLE_GETENV_PROPERTIES
// Property key/value pairs.
// 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;
+
+typedef void main_func (jobject);
+
#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));
+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 (void *e)
+_Jv_ThrowSignal (jthrowable throwable)
{
- java::lang::Throwable *throwable = (java::lang::Throwable *)e;
throwable->fillInStackTrace ();
- _Jv_Throw (throwable);
+ throw throwable;
}
#ifdef HANDLE_SEGV
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);
}
len = strlen (s);
Utf8Const* m = (Utf8Const*) _Jv_AllocBytes (sizeof(Utf8Const) + len + 1);
if (! m)
- JvThrow (no_memory);
+ throw 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;
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;
+ _Jv_Throw (no_memory);
}
-// Allocate a new object of class C. SIZE is the size of the object
+// 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 c, jint size)
+_Jv_AllocObject (jclass klass, jint size)
{
- _Jv_InitClass (c);
+ _Jv_InitClass (klass);
- jobject obj = (jobject) _Jv_AllocObj (size);
- if (__builtin_expect (! obj, false))
- JvThrow (no_memory);
- *((_Jv_VTable **) obj) = c->vtable;
+ 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
// 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 (c->vtable->method[1] != ObjectClass.vtable->method[1])
+ if (klass->vtable->get_finalizer()
+ != java::lang::Object::class$.vtable->get_finalizer())
_Jv_RegisterFinalizer (obj, _Jv_FinalizeObject);
#ifdef ENABLE_JVMPI
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) c;
+ 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 ();
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, jint size)
+{
+ _Jv_InitClass (klass);
+
+ jobject obj = (jobject) _Jv_AllocPtrFreeObj (size, klass);
+
+#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) klass;
+ event.u.obj_alloc.is_array = 0;
+ event.u.obj_alloc.size = size;
+ event.u.obj_alloc.obj_id = (jobjectID) obj;
+
+ _Jv_DisableGC ();
+ (*_Jv_JVMPI_Notify_OBJECT_ALLOC) (&event);
+ _Jv_EnableGC ();
+ }
+#endif
+
+ 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
// array.
_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);
-
- // Check for overflow.
- if (__builtin_expect ((size_t) count >
- (SIZE_T_MAX - size) / sizeof (jobject), false))
- JvThrow (no_memory);
-
+ size_t size = (size_t) elements (obj);
size += count * sizeof (jobject);
- // FIXME: second argument should be "current loader" //
- jclass clas = _Jv_FindArrayClass (elementClass, 0);
+ // FIXME: second argument should be "current loader"
+ jclass klass = _Jv_GetArrayClass (elementClass, 0);
- obj = (jobjectArray) _Jv_AllocArray (size);
- if (__builtin_expect (! obj, false))
- JvThrow (no_memory);
- obj->length = count;
- jobject* ptr = elements(obj);
+ obj = (jobjectArray) _Jv_AllocArray (size, klass);
+ // 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;
}
- // Set the vtbl last to avoid problems if the GC happens during the
- // window in this function between the allocation and this
- // assignment.
- *((_Jv_VTable **) obj) = clas->vtable;
return obj;
}
{
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);
-
- __JArray *arr = (__JArray*) _Jv_AllocObj (size + elsize * count);
- if (__builtin_expect (! arr, false))
- JvThrow (no_memory);
- arr->length = count;
+ 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);
// 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;
- jclass klass = _Jv_FindArrayClass (eltype, 0);
- // Set the vtbl last to avoid problems if the GC happens during the
- // window in this function between the allocation and this
- // assignment.
- *((_Jv_VTable **) arr) = klass->vtable;
return arr;
}
\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)
+#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);
}
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 (name)
{
- _Jv_execName = new char[strlen (name) + 1];
+ _Jv_execName = (char *) _Jv_Malloc (strlen (name) + 1);
strcpy (_Jv_execName, name);
}
}
#endif
-static void
-main_init ()
+/* This will be non-NULL if the user has preloaded a JNI library, or
+ linked one into the executable. */
+extern "C"
{
- 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 ();
+#pragma weak JNI_OnLoad
+ extern jint JNI_OnLoad (JavaVM *, void *) __attribute__((weak));
}
+
#ifndef DISABLE_GETENV_PROPERTIES
static char *
}
#endif // DISABLE_GETENV_PROPERTIES
+jint
+_Jv_CreateJavaVM (void* /*vm_args*/)
+{
+ PROCESS_GCJ_PROPERTIES;
+
+ // Turn stack trace generation off while creating exception objects.
+ _Jv_InitClass (&java::lang::Throwable::class$);
+ java::lang::Throwable::trace_enabled = 0;
+
+ 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;
+
+#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 ();
+
+ /* Some systems let you preload shared libraries before running a
+ program. Under Linux, this is done by setting the LD_PRELOAD
+ environment variable. We take advatage of this here to allow for
+ dynamically loading a JNI library into a fully linked executable. */
+
+ if (JNI_OnLoad != NULL)
+ {
+ JavaVM *vm = _Jv_GetJavaVM ();
+ if (vm == NULL)
+ {
+ // FIXME: what?
+ return -1;
+ }
+ jint vers = JNI_OnLoad (vm, NULL);
+ if (vers != JNI_VERSION_1_1 && vers != JNI_VERSION_1_2)
+ {
+ // FIXME: unload the library.
+ _Jv_Throw (new java::lang::UnsatisfiedLinkError (JvNewStringLatin1 ("unrecognized version from preloaded JNI_OnLoad")));
+ }
+ }
+ return 0;
+}
+
+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)
+ {
+ fprintf (stderr, "%s\n", msg);
+ ::exit(1);
+ }
+
+#ifdef WITH_JVMPI
+ if (_Jv_JVMPI_Notify_THREAD_START)
+ {
+ 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);
+}
+
void
JvRunMain (jclass klass, int argc, const char **argv)
{
- PROCESS_GCJ_PROPERTIES;
+ _Jv_argv = argv;
+ _Jv_argc = argc;
- main_init ();
+ _Jv_CreateJavaVM (NULL);
#ifdef HAVE_PROC_SELF_EXE
char exec_name[20];
sprintf (exec_name, "/proc/%d/exe", getpid ());
_Jv_ThisExecutable (argv[0]);
#endif
+ main_thread = _Jv_AttachCurrentThread (JvNewStringLatin1 ("main"), NULL);
arg_vec = JvConvertArgv (argc - 1, argv + 1);
- main_thread = new gnu::gcj::runtime::FirstThread (klass, arg_vec);
-
- main_thread->start();
+ runFirst (klass, arg_vec);
_Jv_ThreadWait ();
- java::lang::Runtime::getRuntime ()->exit (0);
+ int status = (int) java::lang::ThreadGroup::had_uncaught_exception;
+
+ java::lang::Runtime::getRuntime ()->_exit (status);
}
void
-_Jv_RunMain (const char *class_name, int argc, const char **argv)
+_Jv_RunMain (const char *name, int argc, const char **argv, bool is_jar)
{
- PROCESS_GCJ_PROPERTIES;
+ jstring class_name;
- main_init ();
+ _Jv_CreateJavaVM (NULL);
#ifdef HAVE_PROC_SELF_EXE
char exec_name[20];
_Jv_ThisExecutable (exec_name);
#endif
+ 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);
- main_thread = new gnu::gcj::runtime::FirstThread (JvNewStringLatin1 (class_name),
- arg_vec);
- main_thread->start();
- _Jv_ThreadWait ();
- java::lang::Runtime::getRuntime ()->exit (0);
+ if (class_name)
+ {
+ runFirst(java::lang::Class::forName (class_name), arg_vec);
+ _Jv_ThreadWait ();
+ }
+
+ int status = (int) java::lang::ThreadGroup::had_uncaught_exception;
+
+ java::lang::Runtime::getRuntime ()->exit (status);
}
\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;
}
OSDN Git Service
