1937 lines
48 KiB
C++
1937 lines
48 KiB
C++
// jni.cc - JNI implementation, including the jump table.
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/* Copyright (C) 1998, 1999, 2000 Red Hat, Inc.
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This file is part of libgcj.
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This software is copyrighted work licensed under the terms of the
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Libgcj License. Please consult the file "LIBGCJ_LICENSE" for
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details. */
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#include <config.h>
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#include <stddef.h>
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#include <string.h>
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// Define this before including jni.h.
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#define __GCJ_JNI_IMPL__
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#include <gcj/cni.h>
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#include <jvm.h>
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#include <java-assert.h>
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#include <jni.h>
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#include <java/lang/Class.h>
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#include <java/lang/ClassLoader.h>
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#include <java/lang/Throwable.h>
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#include <java/lang/ArrayIndexOutOfBoundsException.h>
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#include <java/lang/StringIndexOutOfBoundsException.h>
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#include <java/lang/AbstractMethodError.h>
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#include <java/lang/InstantiationException.h>
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#include <java/lang/NoSuchFieldError.h>
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#include <java/lang/NoSuchMethodError.h>
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#include <java/lang/reflect/Constructor.h>
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#include <java/lang/reflect/Method.h>
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#include <java/lang/reflect/Modifier.h>
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#include <java/lang/OutOfMemoryError.h>
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#include <java/util/Hashtable.h>
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#include <java/lang/Integer.h>
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#include <gnu/gcj/jni/NativeThread.h>
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#include <gcj/method.h>
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#include <gcj/field.h>
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#include <java-interp.h>
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#define ClassClass _CL_Q34java4lang5Class
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extern java::lang::Class ClassClass;
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#define ObjectClass _CL_Q34java4lang6Object
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extern java::lang::Class ObjectClass;
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#define ThrowableClass _CL_Q34java4lang9Throwable
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extern java::lang::Class ThrowableClass;
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#define MethodClass _CL_Q44java4lang7reflect6Method
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extern java::lang::Class MethodClass;
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#define ThreadGroupClass _CL_Q34java4lang11ThreadGroup
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extern java::lang::Class ThreadGroupClass;
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#define NativeThreadClass _CL_Q43gnu3gcj3jni12NativeThread
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extern java::lang::Class ThreadGroupClass;
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// This enum is used to select different template instantiations in
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// the invocation code.
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enum invocation_type
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{
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normal,
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nonvirtual,
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static_type,
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constructor
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};
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// Forward declarations.
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extern struct JNINativeInterface _Jv_JNIFunctions;
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extern struct JNIInvokeInterface _Jv_JNI_InvokeFunctions;
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// Number of slots in the default frame. The VM must allow at least
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// 16.
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#define FRAME_SIZE 32
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// This structure is used to keep track of local references.
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struct _Jv_JNI_LocalFrame
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{
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// This is true if this frame object represents a pushed frame (eg
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// from PushLocalFrame).
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int marker : 1;
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// Number of elements in frame.
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int size : 31;
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// Next frame in chain.
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_Jv_JNI_LocalFrame *next;
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// The elements. These are allocated using the C "struct hack".
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jobject vec[0];
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};
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// This holds a reference count for all local and global references.
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static java::util::Hashtable *ref_table;
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// The only VM.
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static JavaVM *the_vm;
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void
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_Jv_JNI_Init (void)
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{
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ref_table = new java::util::Hashtable;
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}
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// Tell the GC that a certain pointer is live.
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static void
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mark_for_gc (jobject obj)
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{
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JvSynchronize sync (ref_table);
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using namespace java::lang;
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Integer *refcount = (Integer *) ref_table->get (obj);
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jint val = (refcount == NULL) ? 0 : refcount->intValue ();
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ref_table->put (obj, new Integer (val + 1));
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}
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// Unmark a pointer.
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static void
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unmark_for_gc (jobject obj)
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{
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JvSynchronize sync (ref_table);
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using namespace java::lang;
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Integer *refcount = (Integer *) ref_table->get (obj);
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JvAssert (refcount);
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jint val = refcount->intValue () - 1;
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if (val == 0)
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ref_table->remove (obj);
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else
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ref_table->put (obj, new Integer (val));
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}
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static jobject
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_Jv_JNI_NewGlobalRef (JNIEnv *, jobject obj)
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{
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mark_for_gc (obj);
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return obj;
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}
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static void
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_Jv_JNI_DeleteGlobalRef (JNIEnv *, jobject obj)
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{
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unmark_for_gc (obj);
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}
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static void
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_Jv_JNI_DeleteLocalRef (JNIEnv *env, jobject obj)
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{
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_Jv_JNI_LocalFrame *frame;
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for (frame = env->locals; frame != NULL; frame = frame->next)
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{
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for (int i = 0; i < FRAME_SIZE; ++i)
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{
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if (frame->vec[i] == obj)
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{
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frame->vec[i] = NULL;
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unmark_for_gc (obj);
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return;
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}
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}
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// Don't go past a marked frame.
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JvAssert (! frame->marker);
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}
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JvAssert (0);
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}
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static jint
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_Jv_JNI_EnsureLocalCapacity (JNIEnv *env, jint size)
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{
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// It is easier to just always allocate a new frame of the requested
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// size. This isn't the most efficient thing, but for now we don't
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// care. Note that _Jv_JNI_PushLocalFrame relies on this right now.
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_Jv_JNI_LocalFrame *frame
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= (_Jv_JNI_LocalFrame *) _Jv_MallocUnchecked (sizeof (_Jv_JNI_LocalFrame)
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+ size * sizeof (jobject));
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if (frame == NULL)
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{
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// FIXME: exception processing.
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env->ex = new java::lang::OutOfMemoryError;
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return JNI_ERR;
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}
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frame->marker = true;
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frame->size = size;
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memset (&frame->vec[0], 0, size * sizeof (jobject));
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frame->next = env->locals;
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env->locals = frame;
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return 0;
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}
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static jint
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_Jv_JNI_PushLocalFrame (JNIEnv *env, jint size)
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{
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jint r = _Jv_JNI_EnsureLocalCapacity (env, size);
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if (r < 0)
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return r;
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// The new frame is on top.
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env->locals->marker = true;
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return 0;
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}
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static jobject
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_Jv_JNI_NewLocalRef (JNIEnv *env, jobject obj)
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{
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// Try to find an open slot somewhere in the topmost frame.
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_Jv_JNI_LocalFrame *frame = env->locals;
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bool done = false, set = false;
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while (frame != NULL && ! done)
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{
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for (int i = 0; i < frame->size; ++i)
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if (frame->vec[i] == NULL)
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{
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set = true;
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done = true;
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frame->vec[i] = obj;
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break;
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}
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}
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if (! set)
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{
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// No slots, so we allocate a new frame. According to the spec
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// we could just die here. FIXME: return value.
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_Jv_JNI_EnsureLocalCapacity (env, 16);
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// We know the first element of the new frame will be ok.
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env->locals->vec[0] = obj;
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}
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mark_for_gc (obj);
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return obj;
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}
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static jobject
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_Jv_JNI_PopLocalFrame (JNIEnv *env, jobject result)
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{
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_Jv_JNI_LocalFrame *rf = env->locals;
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bool done = false;
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while (rf != NULL && ! done)
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{
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for (int i = 0; i < rf->size; ++i)
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if (rf->vec[i] != NULL)
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unmark_for_gc (rf->vec[i]);
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// If the frame we just freed is the marker frame, we are done.
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done = rf->marker;
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_Jv_JNI_LocalFrame *n = rf->next;
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// When N==NULL, we've reached the stack-allocated frame, and we
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// must not free it. However, we must be sure to clear all its
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// elements, since we might conceivably reuse it.
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if (n == NULL)
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{
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memset (&rf->vec[0], 0, rf->size * sizeof (jobject));
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break;
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}
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_Jv_Free (rf);
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rf = n;
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}
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return result == NULL ? NULL : _Jv_JNI_NewLocalRef (env, result);
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}
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// This function is used from other template functions. It wraps the
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// return value appropriately; we specialize it so that object returns
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// are turned into local references.
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template<typename T>
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static T
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wrap_value (JNIEnv *, T value)
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{
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return value;
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}
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template<>
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static jobject
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wrap_value (JNIEnv *env, jobject value)
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{
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return value == NULL ? value : _Jv_JNI_NewLocalRef (env, value);
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}
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static jint
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_Jv_JNI_GetVersion (JNIEnv *)
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{
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return JNI_VERSION_1_2;
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}
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static jclass
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_Jv_JNI_DefineClass (JNIEnv *env, jobject loader,
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const jbyte *buf, jsize bufLen)
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{
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jbyteArray bytes = JvNewByteArray (bufLen);
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jbyte *elts = elements (bytes);
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memcpy (elts, buf, bufLen * sizeof (jbyte));
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java::lang::ClassLoader *l
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= reinterpret_cast<java::lang::ClassLoader *> (loader);
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// FIXME: exception processing.
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jclass result = l->defineClass (bytes, 0, bufLen);
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return (jclass) wrap_value (env, result);
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}
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static jclass
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_Jv_JNI_FindClass (JNIEnv *env, const char *name)
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{
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// FIXME: assume that NAME isn't too long.
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int len = strlen (name);
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char s[len + 1];
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for (int i = 0; i <= len; ++i)
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s[i] = (name[i] == '/') ? '.' : name[i];
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jstring n = JvNewStringUTF (s);
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java::lang::ClassLoader *loader;
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if (env->klass == NULL)
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{
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// FIXME: should use getBaseClassLoader, but we don't have that
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// yet.
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loader = java::lang::ClassLoader::getSystemClassLoader ();
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}
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else
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loader = env->klass->getClassLoader ();
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// FIXME: exception processing.
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jclass r = loader->loadClass (n);
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return (jclass) wrap_value (env, r);
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}
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static jclass
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_Jv_JNI_GetSuperclass (JNIEnv *env, jclass clazz)
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{
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return (jclass) wrap_value (env, clazz->getSuperclass ());
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}
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static jboolean
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_Jv_JNI_IsAssignableFrom(JNIEnv *, jclass clazz1, jclass clazz2)
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{
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return clazz1->isAssignableFrom (clazz2);
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}
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static jint
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_Jv_JNI_Throw (JNIEnv *env, jthrowable obj)
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{
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// We check in case the user did some funky cast.
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JvAssert (obj != NULL && (&ThrowableClass)->isInstance (obj));
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env->ex = obj;
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return 0;
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}
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static jint
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_Jv_JNI_ThrowNew (JNIEnv *env, jclass clazz, const char *message)
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{
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using namespace java::lang::reflect;
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JvAssert ((&ThrowableClass)->isAssignableFrom (clazz));
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JArray<jclass> *argtypes
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= (JArray<jclass> *) JvNewObjectArray (1, &ClassClass, NULL);
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jclass *elts = elements (argtypes);
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elts[0] = &StringClass;
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// FIXME: exception processing.
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Constructor *cons = clazz->getConstructor (argtypes);
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jobjectArray values = JvNewObjectArray (1, &StringClass, NULL);
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jobject *velts = elements (values);
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velts[0] = JvNewStringUTF (message);
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// FIXME: exception processing.
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jobject obj = cons->newInstance (values);
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env->ex = reinterpret_cast<jthrowable> (obj);
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return 0;
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}
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static jthrowable
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_Jv_JNI_ExceptionOccurred (JNIEnv *env)
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{
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return (jthrowable) wrap_value (env, env->ex);
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}
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static void
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_Jv_JNI_ExceptionDescribe (JNIEnv *env)
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{
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if (env->ex != NULL)
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env->ex->printStackTrace();
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}
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static void
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_Jv_JNI_ExceptionClear (JNIEnv *env)
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{
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env->ex = NULL;
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}
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static jboolean
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_Jv_JNI_ExceptionCheck (JNIEnv *env)
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{
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return env->ex != NULL;
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}
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static void
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_Jv_JNI_FatalError (JNIEnv *, const char *message)
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{
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JvFail (message);
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}
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static jboolean
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_Jv_JNI_IsSameObject (JNIEnv *, jobject obj1, jobject obj2)
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{
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return obj1 == obj2;
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}
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static jobject
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_Jv_JNI_AllocObject (JNIEnv *env, jclass clazz)
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{
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jobject obj = NULL;
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using namespace java::lang::reflect;
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JvAssert (clazz && ! clazz->isArray ());
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if (clazz->isInterface() || Modifier::isAbstract(clazz->getModifiers()))
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env->ex = new java::lang::InstantiationException ();
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else
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{
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// FIXME: exception processing.
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// FIXME: will this work for String?
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obj = JvAllocObject (clazz);
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}
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return wrap_value (env, obj);
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}
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static jclass
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_Jv_JNI_GetObjectClass (JNIEnv *env, jobject obj)
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{
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JvAssert (obj);
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return (jclass) wrap_value (env, obj->getClass());
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}
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static jboolean
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_Jv_JNI_IsInstanceOf (JNIEnv *, jobject obj, jclass clazz)
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{
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return clazz->isInstance(obj);
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}
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//
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// This section concerns method invocation.
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//
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template<jboolean is_static>
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static jmethodID
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_Jv_JNI_GetAnyMethodID (JNIEnv *env, jclass clazz,
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const char *name, const char *sig)
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{
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// FIXME: exception processing.
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_Jv_InitClass (clazz);
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_Jv_Utf8Const *name_u = _Jv_makeUtf8Const ((char *) name, -1);
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_Jv_Utf8Const *sig_u = _Jv_makeUtf8Const ((char *) sig, -1);
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JvAssert (! clazz->isPrimitive());
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using namespace java::lang::reflect;
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while (clazz != NULL)
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{
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jint count = JvNumMethods (clazz);
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jmethodID meth = JvGetFirstMethod (clazz);
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for (jint i = 0; i < count; ++i)
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{
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if (((is_static && Modifier::isStatic (meth->accflags))
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|| (! is_static && ! Modifier::isStatic (meth->accflags)))
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&& _Jv_equalUtf8Consts (meth->name, name_u)
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&& _Jv_equalUtf8Consts (meth->signature, sig_u))
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return meth;
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meth = meth->getNextMethod();
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}
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clazz = clazz->getSuperclass ();
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}
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env->ex = new java::lang::NoSuchMethodError ();
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return NULL;
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}
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// This is a helper function which turns a va_list into an array of
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// `jvalue's. It needs signature information in order to do its work.
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// The array of values must already be allocated.
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static void
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array_from_valist (jvalue *values, JArray<jclass> *arg_types, va_list vargs)
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{
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jclass *arg_elts = elements (arg_types);
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for (int i = 0; i < arg_types->length; ++i)
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{
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if (arg_elts[i] == JvPrimClass (byte))
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values[i].b = va_arg (vargs, jbyte);
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else if (arg_elts[i] == JvPrimClass (short))
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values[i].s = va_arg (vargs, jshort);
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else if (arg_elts[i] == JvPrimClass (int))
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values[i].i = va_arg (vargs, jint);
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else if (arg_elts[i] == JvPrimClass (long))
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values[i].j = va_arg (vargs, jlong);
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else if (arg_elts[i] == JvPrimClass (float))
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values[i].f = va_arg (vargs, jfloat);
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else if (arg_elts[i] == JvPrimClass (double))
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values[i].d = va_arg (vargs, jdouble);
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else if (arg_elts[i] == JvPrimClass (boolean))
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values[i].z = va_arg (vargs, jboolean);
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else if (arg_elts[i] == JvPrimClass (char))
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values[i].c = va_arg (vargs, jchar);
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else
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{
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// An object.
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values[i].l = va_arg (vargs, jobject);
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}
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}
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}
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// This can call any sort of method: virtual, "nonvirtual", static, or
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// constructor.
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template<typename T, invocation_type style>
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static T
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_Jv_JNI_CallAnyMethodV (JNIEnv *env, jobject obj, jclass klass,
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jmethodID id, va_list vargs)
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{
|
||
if (style == normal)
|
||
id = _Jv_LookupDeclaredMethod (obj->getClass (), id->name, id->signature);
|
||
|
||
jclass decl_class = klass ? klass : obj->getClass ();
|
||
JvAssert (decl_class != NULL);
|
||
|
||
jclass return_type;
|
||
JArray<jclass> *arg_types;
|
||
// FIXME: exception processing.
|
||
_Jv_GetTypesFromSignature (id, decl_class,
|
||
&arg_types, &return_type);
|
||
|
||
jvalue args[arg_types->length];
|
||
array_from_valist (args, arg_types, vargs);
|
||
|
||
// For constructors we need to pass the Class we are instantiating.
|
||
if (style == constructor)
|
||
return_type = klass;
|
||
|
||
jvalue result;
|
||
jthrowable ex = _Jv_CallAnyMethodA (obj, return_type, id,
|
||
style == constructor,
|
||
arg_types, args, &result);
|
||
|
||
if (ex != NULL)
|
||
env->ex = ex;
|
||
|
||
// We cheat a little here. FIXME.
|
||
return wrap_value (env, * (T *) &result);
|
||
}
|
||
|
||
template<typename T, invocation_type style>
|
||
static T
|
||
_Jv_JNI_CallAnyMethod (JNIEnv *env, jobject obj, jclass klass,
|
||
jmethodID method, ...)
|
||
{
|
||
va_list args;
|
||
T result;
|
||
|
||
va_start (args, method);
|
||
result = _Jv_JNI_CallAnyMethodV<T, style> (env, obj, klass, method, args);
|
||
va_end (args);
|
||
|
||
return result;
|
||
}
|
||
|
||
template<typename T, invocation_type style>
|
||
static T
|
||
_Jv_JNI_CallAnyMethodA (JNIEnv *env, jobject obj, jclass klass,
|
||
jmethodID id, jvalue *args)
|
||
{
|
||
if (style == normal)
|
||
id = _Jv_LookupDeclaredMethod (obj->getClass (), id->name, id->signature);
|
||
|
||
jclass decl_class = klass ? klass : obj->getClass ();
|
||
JvAssert (decl_class != NULL);
|
||
|
||
jclass return_type;
|
||
JArray<jclass> *arg_types;
|
||
// FIXME: exception processing.
|
||
_Jv_GetTypesFromSignature (id, decl_class,
|
||
&arg_types, &return_type);
|
||
|
||
// For constructors we need to pass the Class we are instantiating.
|
||
if (style == constructor)
|
||
return_type = klass;
|
||
|
||
jvalue result;
|
||
jthrowable ex = _Jv_CallAnyMethodA (obj, return_type, id,
|
||
style == constructor,
|
||
arg_types, args, &result);
|
||
|
||
if (ex != NULL)
|
||
env->ex = ex;
|
||
|
||
// We cheat a little here. FIXME.
|
||
return wrap_value (env, * (T *) &result);
|
||
}
|
||
|
||
template<invocation_type style>
|
||
static void
|
||
_Jv_JNI_CallAnyVoidMethodV (JNIEnv *env, jobject obj, jclass klass,
|
||
jmethodID id, va_list vargs)
|
||
{
|
||
if (style == normal)
|
||
id = _Jv_LookupDeclaredMethod (obj->getClass (), id->name, id->signature);
|
||
|
||
jclass decl_class = klass ? klass : obj->getClass ();
|
||
JvAssert (decl_class != NULL);
|
||
|
||
jclass return_type;
|
||
JArray<jclass> *arg_types;
|
||
// FIXME: exception processing.
|
||
_Jv_GetTypesFromSignature (id, decl_class,
|
||
&arg_types, &return_type);
|
||
|
||
jvalue args[arg_types->length];
|
||
array_from_valist (args, arg_types, vargs);
|
||
|
||
// For constructors we need to pass the Class we are instantiating.
|
||
if (style == constructor)
|
||
return_type = klass;
|
||
|
||
jthrowable ex = _Jv_CallAnyMethodA (obj, return_type, id,
|
||
style == constructor,
|
||
arg_types, args, NULL);
|
||
|
||
if (ex != NULL)
|
||
env->ex = ex;
|
||
}
|
||
|
||
template<invocation_type style>
|
||
static void
|
||
_Jv_JNI_CallAnyVoidMethod (JNIEnv *env, jobject obj, jclass klass,
|
||
jmethodID method, ...)
|
||
{
|
||
va_list args;
|
||
|
||
va_start (args, method);
|
||
_Jv_JNI_CallAnyVoidMethodV<style> (env, obj, klass, method, args);
|
||
va_end (args);
|
||
}
|
||
|
||
template<invocation_type style>
|
||
static void
|
||
_Jv_JNI_CallAnyVoidMethodA (JNIEnv *env, jobject obj, jclass klass,
|
||
jmethodID id, jvalue *args)
|
||
{
|
||
if (style == normal)
|
||
id = _Jv_LookupDeclaredMethod (obj->getClass (), id->name, id->signature);
|
||
|
||
jclass decl_class = klass ? klass : obj->getClass ();
|
||
JvAssert (decl_class != NULL);
|
||
|
||
jclass return_type;
|
||
JArray<jclass> *arg_types;
|
||
// FIXME: exception processing.
|
||
_Jv_GetTypesFromSignature (id, decl_class,
|
||
&arg_types, &return_type);
|
||
|
||
jthrowable ex = _Jv_CallAnyMethodA (obj, return_type, id,
|
||
style == constructor,
|
||
arg_types, args, NULL);
|
||
|
||
if (ex != NULL)
|
||
env->ex = ex;
|
||
}
|
||
|
||
// Functions with this signature are used to implement functions in
|
||
// the CallMethod family.
|
||
template<typename T>
|
||
static T
|
||
_Jv_JNI_CallMethodV (JNIEnv *env, jobject obj, jmethodID id, va_list args)
|
||
{
|
||
return _Jv_JNI_CallAnyMethodV<T, normal> (env, obj, NULL, id, args);
|
||
}
|
||
|
||
// Functions with this signature are used to implement functions in
|
||
// the CallMethod family.
|
||
template<typename T>
|
||
static T
|
||
_Jv_JNI_CallMethod (JNIEnv *env, jobject obj, jmethodID id, ...)
|
||
{
|
||
va_list args;
|
||
T result;
|
||
|
||
va_start (args, id);
|
||
result = _Jv_JNI_CallAnyMethodV<T, normal> (env, obj, NULL, id, args);
|
||
va_end (args);
|
||
|
||
return result;
|
||
}
|
||
|
||
// Functions with this signature are used to implement functions in
|
||
// the CallMethod family.
|
||
template<typename T>
|
||
static T
|
||
_Jv_JNI_CallMethodA (JNIEnv *env, jobject obj, jmethodID id, jvalue *args)
|
||
{
|
||
return _Jv_JNI_CallAnyMethodA<T, normal> (env, obj, NULL, id, args);
|
||
}
|
||
|
||
static void
|
||
_Jv_JNI_CallVoidMethodV (JNIEnv *env, jobject obj, jmethodID id, va_list args)
|
||
{
|
||
_Jv_JNI_CallAnyVoidMethodV<normal> (env, obj, NULL, id, args);
|
||
}
|
||
|
||
static void
|
||
_Jv_JNI_CallVoidMethod (JNIEnv *env, jobject obj, jmethodID id, ...)
|
||
{
|
||
va_list args;
|
||
|
||
va_start (args, id);
|
||
_Jv_JNI_CallAnyVoidMethodV<normal> (env, obj, NULL, id, args);
|
||
va_end (args);
|
||
}
|
||
|
||
static void
|
||
_Jv_JNI_CallVoidMethodA (JNIEnv *env, jobject obj, jmethodID id, jvalue *args)
|
||
{
|
||
_Jv_JNI_CallAnyVoidMethodA<normal> (env, obj, NULL, id, args);
|
||
}
|
||
|
||
// Functions with this signature are used to implement functions in
|
||
// the CallStaticMethod family.
|
||
template<typename T>
|
||
static T
|
||
_Jv_JNI_CallStaticMethodV (JNIEnv *env, jclass klass,
|
||
jmethodID id, va_list args)
|
||
{
|
||
JvAssert (((id->accflags) & java::lang::reflect::Modifier::STATIC));
|
||
JvAssert ((&ClassClass)->isInstance (klass));
|
||
|
||
return _Jv_JNI_CallAnyMethodV<T, static_type> (env, NULL, klass, id, args);
|
||
}
|
||
|
||
// Functions with this signature are used to implement functions in
|
||
// the CallStaticMethod family.
|
||
template<typename T>
|
||
static T
|
||
_Jv_JNI_CallStaticMethod (JNIEnv *env, jclass klass, jmethodID id, ...)
|
||
{
|
||
va_list args;
|
||
T result;
|
||
|
||
JvAssert (((id->accflags) & java::lang::reflect::Modifier::STATIC));
|
||
JvAssert ((&ClassClass)->isInstance (klass));
|
||
|
||
va_start (args, id);
|
||
result = _Jv_JNI_CallAnyMethodV<T, static_type> (env, NULL, klass,
|
||
id, args);
|
||
va_end (args);
|
||
|
||
return result;
|
||
}
|
||
|
||
// Functions with this signature are used to implement functions in
|
||
// the CallStaticMethod family.
|
||
template<typename T>
|
||
static T
|
||
_Jv_JNI_CallStaticMethodA (JNIEnv *env, jclass klass, jmethodID id,
|
||
jvalue *args)
|
||
{
|
||
JvAssert (((id->accflags) & java::lang::reflect::Modifier::STATIC));
|
||
JvAssert ((&ClassClass)->isInstance (klass));
|
||
|
||
return _Jv_JNI_CallAnyMethodA<T, static_type> (env, NULL, klass, id, args);
|
||
}
|
||
|
||
static void
|
||
_Jv_JNI_CallStaticVoidMethodV (JNIEnv *env, jclass klass, jmethodID id,
|
||
va_list args)
|
||
{
|
||
_Jv_JNI_CallAnyVoidMethodV<static_type> (env, NULL, klass, id, args);
|
||
}
|
||
|
||
static void
|
||
_Jv_JNI_CallStaticVoidMethod (JNIEnv *env, jclass klass, jmethodID id, ...)
|
||
{
|
||
va_list args;
|
||
|
||
va_start (args, id);
|
||
_Jv_JNI_CallAnyVoidMethodV<static_type> (env, NULL, klass, id, args);
|
||
va_end (args);
|
||
}
|
||
|
||
static void
|
||
_Jv_JNI_CallStaticVoidMethodA (JNIEnv *env, jclass klass, jmethodID id,
|
||
jvalue *args)
|
||
{
|
||
_Jv_JNI_CallAnyVoidMethodA<static_type> (env, NULL, klass, id, args);
|
||
}
|
||
|
||
static jobject
|
||
_Jv_JNI_NewObjectV (JNIEnv *env, jclass klass,
|
||
jmethodID id, va_list args)
|
||
{
|
||
JvAssert (klass && ! klass->isArray ());
|
||
JvAssert (! strcmp (id->name->data, "<init>")
|
||
&& id->signature->length > 2
|
||
&& id->signature->data[0] == '('
|
||
&& ! strcmp (&id->signature->data[id->signature->length - 2],
|
||
")V"));
|
||
|
||
return _Jv_JNI_CallAnyMethodV<jobject, constructor> (env, NULL, klass,
|
||
id, args);
|
||
}
|
||
|
||
static jobject
|
||
_Jv_JNI_NewObject (JNIEnv *env, jclass klass, jmethodID id, ...)
|
||
{
|
||
JvAssert (klass && ! klass->isArray ());
|
||
JvAssert (! strcmp (id->name->data, "<init>")
|
||
&& id->signature->length > 2
|
||
&& id->signature->data[0] == '('
|
||
&& ! strcmp (&id->signature->data[id->signature->length - 2],
|
||
")V"));
|
||
|
||
va_list args;
|
||
jobject result;
|
||
|
||
va_start (args, id);
|
||
result = _Jv_JNI_CallAnyMethodV<jobject, constructor> (env, NULL, klass,
|
||
id, args);
|
||
va_end (args);
|
||
|
||
return result;
|
||
}
|
||
|
||
static jobject
|
||
_Jv_JNI_NewObjectA (JNIEnv *env, jclass klass, jmethodID id,
|
||
jvalue *args)
|
||
{
|
||
JvAssert (klass && ! klass->isArray ());
|
||
JvAssert (! strcmp (id->name->data, "<init>")
|
||
&& id->signature->length > 2
|
||
&& id->signature->data[0] == '('
|
||
&& ! strcmp (&id->signature->data[id->signature->length - 2],
|
||
")V"));
|
||
|
||
return _Jv_JNI_CallAnyMethodA<jobject, constructor> (env, NULL, klass,
|
||
id, args);
|
||
}
|
||
|
||
|
||
|
||
template<typename T>
|
||
static T
|
||
_Jv_JNI_GetField (JNIEnv *env, jobject obj, jfieldID field)
|
||
{
|
||
JvAssert (obj);
|
||
T *ptr = (T *) ((char *) obj + field->getOffset ());
|
||
return wrap_value (env, *ptr);
|
||
}
|
||
|
||
template<typename T>
|
||
static void
|
||
_Jv_JNI_SetField (JNIEnv *, jobject obj, jfieldID field, T value)
|
||
{
|
||
JvAssert (obj);
|
||
T *ptr = (T *) ((char *) obj + field->getOffset ());
|
||
*ptr = value;
|
||
}
|
||
|
||
template<jboolean is_static>
|
||
static jfieldID
|
||
_Jv_JNI_GetAnyFieldID (JNIEnv *env, jclass clazz,
|
||
const char *name, const char *sig)
|
||
{
|
||
// FIXME: exception processing.
|
||
_Jv_InitClass (clazz);
|
||
|
||
_Jv_Utf8Const *a_name = _Jv_makeUtf8Const ((char *) name, -1);
|
||
|
||
jclass field_class = NULL;
|
||
if (sig[0] == '[')
|
||
field_class = _Jv_FindClassFromSignature ((char *) sig, NULL);
|
||
else
|
||
{
|
||
_Jv_Utf8Const *sig_u = _Jv_makeUtf8Const ((char *) sig, -1);
|
||
field_class = _Jv_FindClass (sig_u, NULL);
|
||
}
|
||
|
||
// FIXME: what if field_class == NULL?
|
||
|
||
while (clazz != NULL)
|
||
{
|
||
jint count = (is_static
|
||
? JvNumStaticFields (clazz)
|
||
: JvNumInstanceFields (clazz));
|
||
jfieldID field = (is_static
|
||
? JvGetFirstStaticField (clazz)
|
||
: JvGetFirstInstanceField (clazz));
|
||
for (jint i = 0; i < count; ++i)
|
||
{
|
||
// The field is resolved as a side effect of class
|
||
// initialization.
|
||
JvAssert (field->isResolved ());
|
||
|
||
_Jv_Utf8Const *f_name = field->getNameUtf8Const(clazz);
|
||
|
||
if (_Jv_equalUtf8Consts (f_name, a_name)
|
||
&& field->getClass() == field_class)
|
||
return field;
|
||
|
||
field = field->getNextField ();
|
||
}
|
||
|
||
clazz = clazz->getSuperclass ();
|
||
}
|
||
|
||
env->ex = new java::lang::NoSuchFieldError ();
|
||
return NULL;
|
||
}
|
||
|
||
template<typename T>
|
||
static T
|
||
_Jv_JNI_GetStaticField (JNIEnv *env, jclass, jfieldID field)
|
||
{
|
||
T *ptr = (T *) field->u.addr;
|
||
return wrap_value (env, *ptr);
|
||
}
|
||
|
||
template<typename T>
|
||
static void
|
||
_Jv_JNI_SetStaticField (JNIEnv *, jclass, jfieldID field, T value)
|
||
{
|
||
T *ptr = (T *) field->u.addr;
|
||
*ptr = value;
|
||
}
|
||
|
||
static jstring
|
||
_Jv_JNI_NewString (JNIEnv *env, const jchar *unichars, jsize len)
|
||
{
|
||
// FIXME: exception processing.
|
||
jstring r = _Jv_NewString (unichars, len);
|
||
return (jstring) wrap_value (env, r);
|
||
}
|
||
|
||
static jsize
|
||
_Jv_JNI_GetStringLength (JNIEnv *, jstring string)
|
||
{
|
||
return string->length();
|
||
}
|
||
|
||
static const jchar *
|
||
_Jv_JNI_GetStringChars (JNIEnv *, jstring string, jboolean *isCopy)
|
||
{
|
||
jchar *result = _Jv_GetStringChars (string);
|
||
mark_for_gc (string);
|
||
if (isCopy)
|
||
*isCopy = false;
|
||
return (const jchar *) result;
|
||
}
|
||
|
||
static void
|
||
_Jv_JNI_ReleaseStringChars (JNIEnv *, jstring string, const jchar *)
|
||
{
|
||
unmark_for_gc (string);
|
||
}
|
||
|
||
static jstring
|
||
_Jv_JNI_NewStringUTF (JNIEnv *env, const char *bytes)
|
||
{
|
||
// FIXME: exception processing.
|
||
jstring result = JvNewStringUTF (bytes);
|
||
return (jstring) wrap_value (env, result);
|
||
}
|
||
|
||
static jsize
|
||
_Jv_JNI_GetStringUTFLength (JNIEnv *, jstring string)
|
||
{
|
||
return JvGetStringUTFLength (string);
|
||
}
|
||
|
||
static const char *
|
||
_Jv_JNI_GetStringUTFChars (JNIEnv *, jstring string, jboolean *isCopy)
|
||
{
|
||
jsize len = JvGetStringUTFLength (string);
|
||
// FIXME: exception processing.
|
||
char *r = (char *) _Jv_Malloc (len + 1);
|
||
JvGetStringUTFRegion (string, 0, len, r);
|
||
r[len] = '\0';
|
||
|
||
if (isCopy)
|
||
*isCopy = true;
|
||
|
||
return (const char *) r;
|
||
}
|
||
|
||
static void
|
||
_Jv_JNI_ReleaseStringUTFChars (JNIEnv *, jstring, const char *utf)
|
||
{
|
||
_Jv_Free ((void *) utf);
|
||
}
|
||
|
||
static void
|
||
_Jv_JNI_GetStringRegion (JNIEnv *env, jstring string, jsize start, jsize len,
|
||
jchar *buf)
|
||
{
|
||
jchar *result = _Jv_GetStringChars (string);
|
||
if (start < 0 || start > string->length ()
|
||
|| len < 0 || start + len > string->length ())
|
||
env->ex = new java::lang::StringIndexOutOfBoundsException ();
|
||
else
|
||
memcpy (buf, &result[start], len * sizeof (jchar));
|
||
}
|
||
|
||
static void
|
||
_Jv_JNI_GetStringUTFRegion (JNIEnv *env, jstring str, jsize start,
|
||
jsize len, char *buf)
|
||
{
|
||
if (start < 0 || start > str->length ()
|
||
|| len < 0 || start + len > str->length ())
|
||
env->ex = new java::lang::StringIndexOutOfBoundsException ();
|
||
else
|
||
_Jv_GetStringUTFRegion (str, start, len, buf);
|
||
}
|
||
|
||
static const jchar *
|
||
_Jv_JNI_GetStringCritical (JNIEnv *, jstring str, jboolean *isCopy)
|
||
{
|
||
jchar *result = _Jv_GetStringChars (str);
|
||
if (isCopy)
|
||
*isCopy = false;
|
||
return result;
|
||
}
|
||
|
||
static void
|
||
_Jv_JNI_ReleaseStringCritical (JNIEnv *, jstring, const jchar *)
|
||
{
|
||
// Nothing.
|
||
}
|
||
|
||
static jsize
|
||
_Jv_JNI_GetArrayLength (JNIEnv *, jarray array)
|
||
{
|
||
return array->length;
|
||
}
|
||
|
||
static jarray
|
||
_Jv_JNI_NewObjectArray (JNIEnv *env, jsize length, jclass elementClass,
|
||
jobject init)
|
||
{
|
||
// FIXME: exception processing.
|
||
jarray result = JvNewObjectArray (length, elementClass, init);
|
||
return (jarray) wrap_value (env, result);
|
||
}
|
||
|
||
static jobject
|
||
_Jv_JNI_GetObjectArrayElement (JNIEnv *env, jobjectArray array, jsize index)
|
||
{
|
||
jobject *elts = elements (array);
|
||
return wrap_value (env, elts[index]);
|
||
}
|
||
|
||
static void
|
||
_Jv_JNI_SetObjectArrayElement (JNIEnv *, jobjectArray array, jsize index,
|
||
jobject value)
|
||
{
|
||
// FIXME: exception processing.
|
||
_Jv_CheckArrayStore (array, value);
|
||
jobject *elts = elements (array);
|
||
elts[index] = value;
|
||
}
|
||
|
||
template<typename T, jclass K>
|
||
static JArray<T> *
|
||
_Jv_JNI_NewPrimitiveArray (JNIEnv *env, jsize length)
|
||
{
|
||
// FIXME: exception processing.
|
||
return (JArray<T> *) wrap_value (env, _Jv_NewPrimArray (K, length));
|
||
}
|
||
|
||
template<typename T>
|
||
static T *
|
||
_Jv_JNI_GetPrimitiveArrayElements (JNIEnv *, JArray<T> *array,
|
||
jboolean *isCopy)
|
||
{
|
||
T *elts = elements (array);
|
||
if (isCopy)
|
||
{
|
||
// We elect never to copy.
|
||
*isCopy = false;
|
||
}
|
||
mark_for_gc (array);
|
||
return elts;
|
||
}
|
||
|
||
template<typename T>
|
||
static void
|
||
_Jv_JNI_ReleasePrimitiveArrayElements (JNIEnv *, JArray<T> *array,
|
||
T *, jint /* mode */)
|
||
{
|
||
// Note that we ignore MODE. We can do this because we never copy
|
||
// the array elements. My reading of the JNI documentation is that
|
||
// this is an option for the implementor.
|
||
unmark_for_gc (array);
|
||
}
|
||
|
||
template<typename T>
|
||
static void
|
||
_Jv_JNI_GetPrimitiveArrayRegion (JNIEnv *env, JArray<T> *array,
|
||
jsize start, jsize len,
|
||
T *buf)
|
||
{
|
||
if (start < 0 || len >= array->length || start + len >= array->length)
|
||
{
|
||
// FIXME: index.
|
||
env->ex = new java::lang::ArrayIndexOutOfBoundsException ();
|
||
}
|
||
else
|
||
{
|
||
T *elts = elements (array) + start;
|
||
memcpy (buf, elts, len * sizeof (T));
|
||
}
|
||
}
|
||
|
||
template<typename T>
|
||
static void
|
||
_Jv_JNI_SetPrimitiveArrayRegion (JNIEnv *env, JArray<T> *array,
|
||
jsize start, jsize len, T *buf)
|
||
{
|
||
if (start < 0 || len >= array->length || start + len >= array->length)
|
||
{
|
||
// FIXME: index.
|
||
env->ex = new java::lang::ArrayIndexOutOfBoundsException ();
|
||
}
|
||
else
|
||
{
|
||
T *elts = elements (array) + start;
|
||
memcpy (elts, buf, len * sizeof (T));
|
||
}
|
||
}
|
||
|
||
static void *
|
||
_Jv_JNI_GetPrimitiveArrayCritical (JNIEnv *, jarray array,
|
||
jboolean *isCopy)
|
||
{
|
||
// FIXME: does this work?
|
||
jclass klass = array->getClass()->getComponentType();
|
||
JvAssert (klass->isPrimitive ());
|
||
char *r = _Jv_GetArrayElementFromElementType (array, klass);
|
||
if (isCopy)
|
||
*isCopy = false;
|
||
return r;
|
||
}
|
||
|
||
static void
|
||
_Jv_JNI_ReleasePrimitiveArrayCritical (JNIEnv *, jarray, void *, jint)
|
||
{
|
||
// Nothing.
|
||
}
|
||
|
||
static jint
|
||
_Jv_JNI_MonitorEnter (JNIEnv *, jobject obj)
|
||
{
|
||
// FIXME: exception processing.
|
||
jint r = _Jv_MonitorEnter (obj);
|
||
return r;
|
||
}
|
||
|
||
static jint
|
||
_Jv_JNI_MonitorExit (JNIEnv *, jobject obj)
|
||
{
|
||
// FIXME: exception processing.
|
||
jint r = _Jv_MonitorExit (obj);
|
||
return r;
|
||
}
|
||
|
||
// JDK 1.2
|
||
jobject
|
||
_Jv_JNI_ToReflectedField (JNIEnv *env, jclass cls, jfieldID fieldID,
|
||
jboolean)
|
||
{
|
||
// FIXME: exception processing.
|
||
java::lang::reflect::Field *field = new java::lang::reflect::Field();
|
||
field->declaringClass = cls;
|
||
field->offset = (char*) fieldID - (char *) cls->fields;
|
||
field->name = _Jv_NewStringUtf8Const (fieldID->getNameUtf8Const (cls));
|
||
return wrap_value (env, field);
|
||
}
|
||
|
||
// JDK 1.2
|
||
static jfieldID
|
||
_Jv_JNI_FromReflectedField (JNIEnv *, jobject f)
|
||
{
|
||
using namespace java::lang::reflect;
|
||
|
||
Field *field = reinterpret_cast<Field *> (f);
|
||
return _Jv_FromReflectedField (field);
|
||
}
|
||
|
||
jobject
|
||
_Jv_JNI_ToReflectedMethod (JNIEnv *env, jclass klass, jmethodID id,
|
||
jboolean)
|
||
{
|
||
using namespace java::lang::reflect;
|
||
|
||
// FIXME.
|
||
static _Jv_Utf8Const *init_name = _Jv_makeUtf8Const ("<init>", 6);
|
||
|
||
jobject result;
|
||
if (_Jv_equalUtf8Consts (id->name, init_name))
|
||
{
|
||
// A constructor.
|
||
Constructor *cons = new Constructor ();
|
||
cons->offset = (char *) id - (char *) &klass->methods;
|
||
cons->declaringClass = klass;
|
||
result = cons;
|
||
}
|
||
else
|
||
{
|
||
Method *meth = new Method ();
|
||
meth->offset = (char *) id - (char *) &klass->methods;
|
||
meth->declaringClass = klass;
|
||
result = meth;
|
||
}
|
||
|
||
return wrap_value (env, result);
|
||
}
|
||
|
||
static jmethodID
|
||
_Jv_JNI_FromReflectedMethod (JNIEnv *, jobject method)
|
||
{
|
||
using namespace java::lang::reflect;
|
||
if ((&MethodClass)->isInstance (method))
|
||
return _Jv_FromReflectedMethod (reinterpret_cast<Method *> (method));
|
||
return
|
||
_Jv_FromReflectedConstructor (reinterpret_cast<Constructor *> (method));
|
||
}
|
||
|
||
|
||
|
||
#ifdef INTERPRETER
|
||
|
||
// Add a character to the buffer, encoding properly.
|
||
static void
|
||
add_char (char *buf, jchar c, int *here)
|
||
{
|
||
if (c == '_')
|
||
{
|
||
buf[(*here)++] = '_';
|
||
buf[(*here)++] = '1';
|
||
}
|
||
else if (c == ';')
|
||
{
|
||
buf[(*here)++] = '_';
|
||
buf[(*here)++] = '2';
|
||
}
|
||
else if (c == '[')
|
||
{
|
||
buf[(*here)++] = '_';
|
||
buf[(*here)++] = '3';
|
||
}
|
||
else if (c == '/')
|
||
buf[(*here)++] = '_';
|
||
else if ((c >= '0' && c <= '9')
|
||
|| (c >= 'a' && c <= 'z')
|
||
|| (c >= 'A' && c <= 'Z'))
|
||
buf[(*here)++] = (char) c;
|
||
else
|
||
{
|
||
// "Unicode" character.
|
||
buf[(*here)++] = '_';
|
||
buf[(*here)++] = '0';
|
||
for (int i = 0; i < 4; ++i)
|
||
{
|
||
int val = c & 0x0f;
|
||
buf[(*here) + 4 - i] = (val > 10) ? ('a' + val - 10) : ('0' + val);
|
||
c >>= 4;
|
||
}
|
||
*here += 4;
|
||
}
|
||
}
|
||
|
||
// Compute a mangled name for a native function. This computes the
|
||
// long name, and also returns an index which indicates where a NUL
|
||
// can be placed to create the short name. This function assumes that
|
||
// the buffer is large enough for its results.
|
||
static void
|
||
mangled_name (jclass klass, _Jv_Utf8Const *func_name,
|
||
_Jv_Utf8Const *signature, char *buf, int *long_start)
|
||
{
|
||
strcpy (buf, "Java_");
|
||
int here = 5;
|
||
|
||
// Add fully qualified class name.
|
||
jchar *chars = _Jv_GetStringChars (klass->getName ());
|
||
jint len = klass->getName ()->length ();
|
||
for (int i = 0; i < len; ++i)
|
||
add_char (buf, chars[i], &here);
|
||
|
||
// Don't use add_char because we need a literal `_'.
|
||
buf[here++] = '_';
|
||
|
||
const unsigned char *fn = (const unsigned char *) func_name->data;
|
||
const unsigned char *limit = fn + func_name->length;
|
||
for (int i = 0; ; ++i)
|
||
{
|
||
int ch = UTF8_GET (fn, limit);
|
||
if (ch < 0)
|
||
break;
|
||
add_char (buf, ch, &here);
|
||
}
|
||
|
||
// This is where the long signature begins.
|
||
*long_start = here;
|
||
buf[here++] = '_';
|
||
buf[here++] = '_';
|
||
|
||
const unsigned char *sig = (const unsigned char *) signature->data;
|
||
limit = sig + signature->length;
|
||
JvAssert (signature[0] == '(');
|
||
++sig;
|
||
while (1)
|
||
{
|
||
int ch = UTF8_GET (sig, limit);
|
||
if (ch == ')' || ch < 0)
|
||
break;
|
||
add_char (buf, ch, &here);
|
||
}
|
||
|
||
buf[here] = '\0';
|
||
}
|
||
|
||
// This function is the stub which is used to turn an ordinary (CNI)
|
||
// method call into a JNI call.
|
||
void
|
||
_Jv_JNIMethod::call (ffi_cif *, void *ret, ffi_raw *args, void *__this)
|
||
{
|
||
_Jv_JNIMethod* _this = (_Jv_JNIMethod *) __this;
|
||
|
||
JNIEnv env;
|
||
_Jv_JNI_LocalFrame *frame
|
||
= (_Jv_JNI_LocalFrame *) alloca (sizeof (_Jv_JNI_LocalFrame)
|
||
+ FRAME_SIZE * sizeof (jobject));
|
||
|
||
env.p = &_Jv_JNIFunctions;
|
||
env.ex = NULL;
|
||
env.klass = _this->defining_class;
|
||
env.locals = frame;
|
||
|
||
frame->marker = true;
|
||
frame->next = NULL;
|
||
frame->size = FRAME_SIZE;
|
||
for (int i = 0; i < frame->size; ++i)
|
||
frame->vec[i] = NULL;
|
||
|
||
// FIXME: we should mark every reference parameter as a local. For
|
||
// now we assume a conservative GC, and we assume that the
|
||
// references are on the stack somewhere.
|
||
|
||
// We cache the value that we find, of course, but if we don't find
|
||
// a value we don't cache that fact -- we might subsequently load a
|
||
// library which finds the function in question.
|
||
if (_this->function == NULL)
|
||
{
|
||
char buf[10 + 6 * (_this->self->name->length
|
||
+ _this->self->signature->length)];
|
||
int long_start;
|
||
mangled_name (_this->defining_class, _this->self->name,
|
||
_this->self->signature, buf, &long_start);
|
||
char c = buf[long_start];
|
||
buf[long_start] = '\0';
|
||
_this->function = _Jv_FindSymbolInExecutable (buf);
|
||
if (_this->function == NULL)
|
||
{
|
||
buf[long_start] = c;
|
||
_this->function = _Jv_FindSymbolInExecutable (buf);
|
||
if (_this->function == NULL)
|
||
{
|
||
jstring str = JvNewStringUTF (_this->self->name->data);
|
||
JvThrow (new java::lang::AbstractMethodError (str));
|
||
}
|
||
}
|
||
}
|
||
|
||
JvAssert (_this->args_raw_size % sizeof (ffi_raw) == 0);
|
||
ffi_raw real_args[2 + _this->args_raw_size / sizeof (ffi_raw)];
|
||
int offset = 0;
|
||
|
||
// First argument is always the environment pointer.
|
||
real_args[offset++].ptr = &env;
|
||
|
||
// For a static method, we pass in the Class. For non-static
|
||
// methods, the `this' argument is already handled.
|
||
if ((_this->self->accflags & java::lang::reflect::Modifier::STATIC))
|
||
real_args[offset++].ptr = _this->defining_class;
|
||
|
||
// Copy over passed-in arguments.
|
||
memcpy (&real_args[offset], args, _this->args_raw_size);
|
||
|
||
// The actual call to the JNI function.
|
||
ffi_raw_call (&_this->jni_cif, (void (*) (...)) _this->function,
|
||
ret, real_args);
|
||
|
||
do
|
||
{
|
||
_Jv_JNI_PopLocalFrame (&env, NULL);
|
||
}
|
||
while (env.locals != frame);
|
||
|
||
if (env.ex)
|
||
JvThrow (env.ex);
|
||
}
|
||
|
||
#endif /* INTERPRETER */
|
||
|
||
|
||
|
||
//
|
||
// Invocation API.
|
||
//
|
||
|
||
// An internal helper function.
|
||
static jint
|
||
_Jv_JNI_AttachCurrentThread (JavaVM *, jstring name, void **penv, void *args)
|
||
{
|
||
JavaVMAttachArgs *attach = reinterpret_cast<JavaVMAttachArgs *> (args);
|
||
java::lang::ThreadGroup *group = NULL;
|
||
|
||
if (attach)
|
||
{
|
||
// FIXME: do we really want to support 1.1?
|
||
if (attach->version != JNI_VERSION_1_2
|
||
&& attach->version != JNI_VERSION_1_1)
|
||
return JNI_EVERSION;
|
||
|
||
JvAssert ((&ThreadGroupClass)->isInstance (attach->group));
|
||
group = reinterpret_cast<java::lang::ThreadGroup *> (attach->group);
|
||
}
|
||
|
||
// Attaching an already-attached thread is a no-op.
|
||
if (_Jv_ThreadCurrent () != NULL)
|
||
return 0;
|
||
|
||
JNIEnv *env = (JNIEnv *) _Jv_MallocUnchecked (sizeof (JNIEnv));
|
||
if (env == NULL)
|
||
return JNI_ERR;
|
||
env->p = &_Jv_JNIFunctions;
|
||
env->ex = NULL;
|
||
env->klass = NULL;
|
||
env->locals
|
||
= (_Jv_JNI_LocalFrame *) _Jv_MallocUnchecked (sizeof (_Jv_JNI_LocalFrame)
|
||
+ (FRAME_SIZE
|
||
* sizeof (jobject)));
|
||
if (env->locals == NULL)
|
||
{
|
||
_Jv_Free (env);
|
||
return JNI_ERR;
|
||
}
|
||
*penv = reinterpret_cast<void *> (env);
|
||
|
||
java::lang::Thread *t = new gnu::gcj::jni::NativeThread (group, name);
|
||
t = t; // Avoid compiler warning. Eww.
|
||
_Jv_SetCurrentJNIEnv (env);
|
||
|
||
return 0;
|
||
}
|
||
|
||
// This is the one actually used by JNI.
|
||
static jint
|
||
_Jv_JNI_AttachCurrentThread (JavaVM *vm, void **penv, void *args)
|
||
{
|
||
return _Jv_JNI_AttachCurrentThread (vm, NULL, penv, args);
|
||
}
|
||
|
||
static jint
|
||
_Jv_JNI_DestroyJavaVM (JavaVM *vm)
|
||
{
|
||
JvAssert (the_vm && vm == the_vm);
|
||
|
||
JNIEnv *env;
|
||
if (_Jv_ThreadCurrent () != NULL)
|
||
{
|
||
jint r = _Jv_JNI_AttachCurrentThread (vm,
|
||
JvNewStringLatin1 ("main"),
|
||
reinterpret_cast<void **> (&env),
|
||
NULL);
|
||
if (r < 0)
|
||
return r;
|
||
}
|
||
else
|
||
env = _Jv_GetCurrentJNIEnv ();
|
||
|
||
_Jv_ThreadWait ();
|
||
|
||
// Docs say that this always returns an error code.
|
||
return JNI_ERR;
|
||
}
|
||
|
||
static jint
|
||
_Jv_JNI_DetachCurrentThread (JavaVM *)
|
||
{
|
||
java::lang::Thread *t = _Jv_ThreadCurrent ();
|
||
if (t == NULL)
|
||
return JNI_EDETACHED;
|
||
|
||
// FIXME: we only allow threads attached via AttachCurrentThread to
|
||
// be detached. I have no idea how we could implement detaching
|
||
// other threads, given the requirement that we must release all the
|
||
// monitors. That just seems evil.
|
||
JvAssert ((&NativeThreadClass)->isInstance (t));
|
||
|
||
// FIXME: release the monitors. We'll take this to mean all
|
||
// monitors acquired via the JNI interface. This means we have to
|
||
// keep track of them.
|
||
|
||
gnu::gcj::jni::NativeThread *nt
|
||
= reinterpret_cast<gnu::gcj::jni::NativeThread *> (t);
|
||
nt->finish ();
|
||
|
||
return 0;
|
||
}
|
||
|
||
static jint
|
||
_Jv_JNI_GetEnv (JavaVM *, void **penv, jint version)
|
||
{
|
||
if (_Jv_ThreadCurrent () == NULL)
|
||
{
|
||
*penv = NULL;
|
||
return JNI_EDETACHED;
|
||
}
|
||
|
||
// FIXME: do we really want to support 1.1?
|
||
if (version != JNI_VERSION_1_2 && version != JNI_VERSION_1_1)
|
||
{
|
||
*penv = NULL;
|
||
return JNI_EVERSION;
|
||
}
|
||
|
||
*penv = (void *) _Jv_GetCurrentJNIEnv ();
|
||
return 0;
|
||
}
|
||
|
||
jint
|
||
JNI_GetDefaultJavaVMInitArgs (void *args)
|
||
{
|
||
jint version = * (jint *) args;
|
||
// Here we only support 1.2.
|
||
if (version != JNI_VERSION_1_2)
|
||
return JNI_EVERSION;
|
||
|
||
JavaVMInitArgs *ia = reinterpret_cast<JavaVMInitArgs *> (args);
|
||
ia->version = JNI_VERSION_1_2;
|
||
ia->nOptions = 0;
|
||
ia->options = NULL;
|
||
ia->ignoreUnrecognized = true;
|
||
|
||
return 0;
|
||
}
|
||
|
||
jint
|
||
JNI_CreateJavaVM (JavaVM **vm, void **penv, void *args)
|
||
{
|
||
JvAssert (! the_vm);
|
||
// FIXME: synchronize
|
||
JavaVM *nvm = (JavaVM *) _Jv_MallocUnchecked (sizeof (JavaVM));
|
||
if (nvm == NULL)
|
||
return JNI_ERR;
|
||
nvm->functions = &_Jv_JNI_InvokeFunctions;
|
||
|
||
// Parse the arguments.
|
||
if (args != NULL)
|
||
{
|
||
jint version = * (jint *) args;
|
||
// We only support 1.2.
|
||
if (version != JNI_VERSION_1_2)
|
||
return JNI_EVERSION;
|
||
JavaVMInitArgs *ia = reinterpret_cast<JavaVMInitArgs *> (args);
|
||
for (int i = 0; i < ia->nOptions; ++i)
|
||
{
|
||
if (! strcmp (ia->options[i].optionString, "vfprintf")
|
||
|| ! strcmp (ia->options[i].optionString, "exit")
|
||
|| ! strcmp (ia->options[i].optionString, "abort"))
|
||
{
|
||
// We are required to recognize these, but for now we
|
||
// don't handle them in any way. FIXME.
|
||
continue;
|
||
}
|
||
else if (! strncmp (ia->options[i].optionString,
|
||
"-verbose", sizeof ("-verbose") - 1))
|
||
{
|
||
// We don't do anything with this option either. We
|
||
// might want to make sure the argument is valid, but we
|
||
// don't really care all that much for now.
|
||
continue;
|
||
}
|
||
else if (! strncmp (ia->options[i].optionString, "-D", 2))
|
||
{
|
||
// FIXME.
|
||
continue;
|
||
}
|
||
else if (ia->ignoreUnrecognized)
|
||
{
|
||
if (ia->options[i].optionString[0] == '_'
|
||
|| ! strncmp (ia->options[i].optionString, "-X", 2))
|
||
continue;
|
||
}
|
||
|
||
return JNI_ERR;
|
||
}
|
||
}
|
||
|
||
jint r =_Jv_JNI_AttachCurrentThread (nvm, penv, NULL);
|
||
if (r < 0)
|
||
return r;
|
||
|
||
the_vm = nvm;
|
||
*vm = the_vm;
|
||
return 0;
|
||
}
|
||
|
||
jint
|
||
JNI_GetCreatedJavaVMs (JavaVM **vm_buffer, jsize buf_len, jsize *n_vms)
|
||
{
|
||
JvAssert (buf_len > 0);
|
||
// We only support a single VM.
|
||
if (the_vm != NULL)
|
||
{
|
||
vm_buffer[0] = the_vm;
|
||
*n_vms = 1;
|
||
}
|
||
else
|
||
*n_vms = 0;
|
||
return 0;
|
||
}
|
||
|
||
jint
|
||
_Jv_JNI_GetJavaVM (JNIEnv *, JavaVM **vm)
|
||
{
|
||
// FIXME: synchronize
|
||
if (! the_vm)
|
||
{
|
||
JavaVM *nvm = (JavaVM *) _Jv_MallocUnchecked (sizeof (JavaVM));
|
||
if (nvm == NULL)
|
||
return JNI_ERR;
|
||
nvm->functions = &_Jv_JNI_InvokeFunctions;
|
||
the_vm = nvm;
|
||
}
|
||
|
||
*vm = the_vm;
|
||
return 0;
|
||
}
|
||
|
||
|
||
|
||
#define NOT_IMPL NULL
|
||
#define RESERVED NULL
|
||
|
||
struct JNINativeInterface _Jv_JNIFunctions =
|
||
{
|
||
RESERVED,
|
||
RESERVED,
|
||
RESERVED,
|
||
RESERVED,
|
||
_Jv_JNI_GetVersion,
|
||
_Jv_JNI_DefineClass,
|
||
_Jv_JNI_FindClass,
|
||
_Jv_JNI_FromReflectedMethod,
|
||
_Jv_JNI_FromReflectedField,
|
||
_Jv_JNI_ToReflectedMethod,
|
||
_Jv_JNI_GetSuperclass,
|
||
_Jv_JNI_IsAssignableFrom,
|
||
_Jv_JNI_ToReflectedField,
|
||
_Jv_JNI_Throw,
|
||
_Jv_JNI_ThrowNew,
|
||
_Jv_JNI_ExceptionOccurred,
|
||
_Jv_JNI_ExceptionDescribe,
|
||
_Jv_JNI_ExceptionClear,
|
||
_Jv_JNI_FatalError,
|
||
|
||
_Jv_JNI_PushLocalFrame,
|
||
_Jv_JNI_PopLocalFrame,
|
||
_Jv_JNI_NewGlobalRef,
|
||
_Jv_JNI_DeleteGlobalRef,
|
||
_Jv_JNI_DeleteLocalRef,
|
||
|
||
_Jv_JNI_IsSameObject,
|
||
|
||
_Jv_JNI_NewLocalRef,
|
||
_Jv_JNI_EnsureLocalCapacity,
|
||
|
||
_Jv_JNI_AllocObject,
|
||
_Jv_JNI_NewObject,
|
||
_Jv_JNI_NewObjectV,
|
||
_Jv_JNI_NewObjectA,
|
||
_Jv_JNI_GetObjectClass,
|
||
_Jv_JNI_IsInstanceOf,
|
||
_Jv_JNI_GetAnyMethodID<false>,
|
||
|
||
_Jv_JNI_CallMethod<jobject>,
|
||
_Jv_JNI_CallMethodV<jobject>,
|
||
_Jv_JNI_CallMethodA<jobject>,
|
||
_Jv_JNI_CallMethod<jboolean>,
|
||
_Jv_JNI_CallMethodV<jboolean>,
|
||
_Jv_JNI_CallMethodA<jboolean>,
|
||
_Jv_JNI_CallMethod<jbyte>,
|
||
_Jv_JNI_CallMethodV<jbyte>,
|
||
_Jv_JNI_CallMethodA<jbyte>,
|
||
_Jv_JNI_CallMethod<jchar>,
|
||
_Jv_JNI_CallMethodV<jchar>,
|
||
_Jv_JNI_CallMethodA<jchar>,
|
||
_Jv_JNI_CallMethod<jshort>,
|
||
_Jv_JNI_CallMethodV<jshort>,
|
||
_Jv_JNI_CallMethodA<jshort>,
|
||
_Jv_JNI_CallMethod<jint>,
|
||
_Jv_JNI_CallMethodV<jint>,
|
||
_Jv_JNI_CallMethodA<jint>,
|
||
_Jv_JNI_CallMethod<jlong>,
|
||
_Jv_JNI_CallMethodV<jlong>,
|
||
_Jv_JNI_CallMethodA<jlong>,
|
||
_Jv_JNI_CallMethod<jfloat>,
|
||
_Jv_JNI_CallMethodV<jfloat>,
|
||
_Jv_JNI_CallMethodA<jfloat>,
|
||
_Jv_JNI_CallMethod<jdouble>,
|
||
_Jv_JNI_CallMethodV<jdouble>,
|
||
_Jv_JNI_CallMethodA<jdouble>,
|
||
_Jv_JNI_CallVoidMethod,
|
||
_Jv_JNI_CallVoidMethodV,
|
||
_Jv_JNI_CallVoidMethodA,
|
||
|
||
// Nonvirtual method invocation functions follow.
|
||
_Jv_JNI_CallAnyMethod<jobject, nonvirtual>,
|
||
_Jv_JNI_CallAnyMethodV<jobject, nonvirtual>,
|
||
_Jv_JNI_CallAnyMethodA<jobject, nonvirtual>,
|
||
_Jv_JNI_CallAnyMethod<jboolean, nonvirtual>,
|
||
_Jv_JNI_CallAnyMethodV<jboolean, nonvirtual>,
|
||
_Jv_JNI_CallAnyMethodA<jboolean, nonvirtual>,
|
||
_Jv_JNI_CallAnyMethod<jbyte, nonvirtual>,
|
||
_Jv_JNI_CallAnyMethodV<jbyte, nonvirtual>,
|
||
_Jv_JNI_CallAnyMethodA<jbyte, nonvirtual>,
|
||
_Jv_JNI_CallAnyMethod<jchar, nonvirtual>,
|
||
_Jv_JNI_CallAnyMethodV<jchar, nonvirtual>,
|
||
_Jv_JNI_CallAnyMethodA<jchar, nonvirtual>,
|
||
_Jv_JNI_CallAnyMethod<jshort, nonvirtual>,
|
||
_Jv_JNI_CallAnyMethodV<jshort, nonvirtual>,
|
||
_Jv_JNI_CallAnyMethodA<jshort, nonvirtual>,
|
||
_Jv_JNI_CallAnyMethod<jint, nonvirtual>,
|
||
_Jv_JNI_CallAnyMethodV<jint, nonvirtual>,
|
||
_Jv_JNI_CallAnyMethodA<jint, nonvirtual>,
|
||
_Jv_JNI_CallAnyMethod<jlong, nonvirtual>,
|
||
_Jv_JNI_CallAnyMethodV<jlong, nonvirtual>,
|
||
_Jv_JNI_CallAnyMethodA<jlong, nonvirtual>,
|
||
_Jv_JNI_CallAnyMethod<jfloat, nonvirtual>,
|
||
_Jv_JNI_CallAnyMethodV<jfloat, nonvirtual>,
|
||
_Jv_JNI_CallAnyMethodA<jfloat, nonvirtual>,
|
||
_Jv_JNI_CallAnyMethod<jdouble, nonvirtual>,
|
||
_Jv_JNI_CallAnyMethodV<jdouble, nonvirtual>,
|
||
_Jv_JNI_CallAnyMethodA<jdouble, nonvirtual>,
|
||
_Jv_JNI_CallAnyVoidMethod<nonvirtual>,
|
||
_Jv_JNI_CallAnyVoidMethodV<nonvirtual>,
|
||
_Jv_JNI_CallAnyVoidMethodA<nonvirtual>,
|
||
|
||
_Jv_JNI_GetAnyFieldID<false>,
|
||
_Jv_JNI_GetField<jobject>,
|
||
_Jv_JNI_GetField<jboolean>,
|
||
_Jv_JNI_GetField<jbyte>,
|
||
_Jv_JNI_GetField<jchar>,
|
||
_Jv_JNI_GetField<jshort>,
|
||
_Jv_JNI_GetField<jint>,
|
||
_Jv_JNI_GetField<jlong>,
|
||
_Jv_JNI_GetField<jfloat>,
|
||
_Jv_JNI_GetField<jdouble>,
|
||
_Jv_JNI_SetField,
|
||
_Jv_JNI_SetField,
|
||
_Jv_JNI_SetField,
|
||
_Jv_JNI_SetField,
|
||
_Jv_JNI_SetField,
|
||
_Jv_JNI_SetField,
|
||
_Jv_JNI_SetField,
|
||
_Jv_JNI_SetField,
|
||
_Jv_JNI_SetField,
|
||
_Jv_JNI_GetAnyMethodID<true>,
|
||
|
||
_Jv_JNI_CallStaticMethod<jobject>,
|
||
_Jv_JNI_CallStaticMethodV<jobject>,
|
||
_Jv_JNI_CallStaticMethodA<jobject>,
|
||
_Jv_JNI_CallStaticMethod<jboolean>,
|
||
_Jv_JNI_CallStaticMethodV<jboolean>,
|
||
_Jv_JNI_CallStaticMethodA<jboolean>,
|
||
_Jv_JNI_CallStaticMethod<jbyte>,
|
||
_Jv_JNI_CallStaticMethodV<jbyte>,
|
||
_Jv_JNI_CallStaticMethodA<jbyte>,
|
||
_Jv_JNI_CallStaticMethod<jchar>,
|
||
_Jv_JNI_CallStaticMethodV<jchar>,
|
||
_Jv_JNI_CallStaticMethodA<jchar>,
|
||
_Jv_JNI_CallStaticMethod<jshort>,
|
||
_Jv_JNI_CallStaticMethodV<jshort>,
|
||
_Jv_JNI_CallStaticMethodA<jshort>,
|
||
_Jv_JNI_CallStaticMethod<jint>,
|
||
_Jv_JNI_CallStaticMethodV<jint>,
|
||
_Jv_JNI_CallStaticMethodA<jint>,
|
||
_Jv_JNI_CallStaticMethod<jlong>,
|
||
_Jv_JNI_CallStaticMethodV<jlong>,
|
||
_Jv_JNI_CallStaticMethodA<jlong>,
|
||
_Jv_JNI_CallStaticMethod<jfloat>,
|
||
_Jv_JNI_CallStaticMethodV<jfloat>,
|
||
_Jv_JNI_CallStaticMethodA<jfloat>,
|
||
_Jv_JNI_CallStaticMethod<jdouble>,
|
||
_Jv_JNI_CallStaticMethodV<jdouble>,
|
||
_Jv_JNI_CallStaticMethodA<jdouble>,
|
||
_Jv_JNI_CallStaticVoidMethod,
|
||
_Jv_JNI_CallStaticVoidMethodV,
|
||
_Jv_JNI_CallStaticVoidMethodA,
|
||
|
||
_Jv_JNI_GetAnyFieldID<true>,
|
||
_Jv_JNI_GetStaticField<jobject>,
|
||
_Jv_JNI_GetStaticField<jboolean>,
|
||
_Jv_JNI_GetStaticField<jbyte>,
|
||
_Jv_JNI_GetStaticField<jchar>,
|
||
_Jv_JNI_GetStaticField<jshort>,
|
||
_Jv_JNI_GetStaticField<jint>,
|
||
_Jv_JNI_GetStaticField<jlong>,
|
||
_Jv_JNI_GetStaticField<jfloat>,
|
||
_Jv_JNI_GetStaticField<jdouble>,
|
||
_Jv_JNI_SetStaticField,
|
||
_Jv_JNI_SetStaticField,
|
||
_Jv_JNI_SetStaticField,
|
||
_Jv_JNI_SetStaticField,
|
||
_Jv_JNI_SetStaticField,
|
||
_Jv_JNI_SetStaticField,
|
||
_Jv_JNI_SetStaticField,
|
||
_Jv_JNI_SetStaticField,
|
||
_Jv_JNI_SetStaticField,
|
||
_Jv_JNI_NewString,
|
||
_Jv_JNI_GetStringLength,
|
||
_Jv_JNI_GetStringChars,
|
||
_Jv_JNI_ReleaseStringChars,
|
||
_Jv_JNI_NewStringUTF,
|
||
_Jv_JNI_GetStringUTFLength,
|
||
_Jv_JNI_GetStringUTFChars,
|
||
_Jv_JNI_ReleaseStringUTFChars,
|
||
_Jv_JNI_GetArrayLength,
|
||
_Jv_JNI_NewObjectArray,
|
||
_Jv_JNI_GetObjectArrayElement,
|
||
_Jv_JNI_SetObjectArrayElement,
|
||
_Jv_JNI_NewPrimitiveArray<jboolean, JvPrimClass (boolean)>,
|
||
_Jv_JNI_NewPrimitiveArray<jbyte, JvPrimClass (byte)>,
|
||
_Jv_JNI_NewPrimitiveArray<jchar, JvPrimClass (char)>,
|
||
_Jv_JNI_NewPrimitiveArray<jshort, JvPrimClass (short)>,
|
||
_Jv_JNI_NewPrimitiveArray<jint, JvPrimClass (int)>,
|
||
_Jv_JNI_NewPrimitiveArray<jlong, JvPrimClass (long)>,
|
||
_Jv_JNI_NewPrimitiveArray<jfloat, JvPrimClass (float)>,
|
||
_Jv_JNI_NewPrimitiveArray<jdouble, JvPrimClass (double)>,
|
||
_Jv_JNI_GetPrimitiveArrayElements,
|
||
_Jv_JNI_GetPrimitiveArrayElements,
|
||
_Jv_JNI_GetPrimitiveArrayElements,
|
||
_Jv_JNI_GetPrimitiveArrayElements,
|
||
_Jv_JNI_GetPrimitiveArrayElements,
|
||
_Jv_JNI_GetPrimitiveArrayElements,
|
||
_Jv_JNI_GetPrimitiveArrayElements,
|
||
_Jv_JNI_GetPrimitiveArrayElements,
|
||
_Jv_JNI_ReleasePrimitiveArrayElements,
|
||
_Jv_JNI_ReleasePrimitiveArrayElements,
|
||
_Jv_JNI_ReleasePrimitiveArrayElements,
|
||
_Jv_JNI_ReleasePrimitiveArrayElements,
|
||
_Jv_JNI_ReleasePrimitiveArrayElements,
|
||
_Jv_JNI_ReleasePrimitiveArrayElements,
|
||
_Jv_JNI_ReleasePrimitiveArrayElements,
|
||
_Jv_JNI_ReleasePrimitiveArrayElements,
|
||
_Jv_JNI_GetPrimitiveArrayRegion,
|
||
_Jv_JNI_GetPrimitiveArrayRegion,
|
||
_Jv_JNI_GetPrimitiveArrayRegion,
|
||
_Jv_JNI_GetPrimitiveArrayRegion,
|
||
_Jv_JNI_GetPrimitiveArrayRegion,
|
||
_Jv_JNI_GetPrimitiveArrayRegion,
|
||
_Jv_JNI_GetPrimitiveArrayRegion,
|
||
_Jv_JNI_GetPrimitiveArrayRegion,
|
||
_Jv_JNI_SetPrimitiveArrayRegion,
|
||
_Jv_JNI_SetPrimitiveArrayRegion,
|
||
_Jv_JNI_SetPrimitiveArrayRegion,
|
||
_Jv_JNI_SetPrimitiveArrayRegion,
|
||
_Jv_JNI_SetPrimitiveArrayRegion,
|
||
_Jv_JNI_SetPrimitiveArrayRegion,
|
||
_Jv_JNI_SetPrimitiveArrayRegion,
|
||
_Jv_JNI_SetPrimitiveArrayRegion,
|
||
NOT_IMPL /* RegisterNatives */,
|
||
NOT_IMPL /* UnregisterNatives */,
|
||
_Jv_JNI_MonitorEnter,
|
||
_Jv_JNI_MonitorExit,
|
||
_Jv_JNI_GetJavaVM,
|
||
|
||
_Jv_JNI_GetStringRegion,
|
||
_Jv_JNI_GetStringUTFRegion,
|
||
_Jv_JNI_GetPrimitiveArrayCritical,
|
||
_Jv_JNI_ReleasePrimitiveArrayCritical,
|
||
_Jv_JNI_GetStringCritical,
|
||
_Jv_JNI_ReleaseStringCritical,
|
||
|
||
NOT_IMPL /* newweakglobalref */,
|
||
NOT_IMPL /* deleteweakglobalref */,
|
||
|
||
_Jv_JNI_ExceptionCheck
|
||
};
|
||
|
||
struct JNIInvokeInterface _Jv_JNI_InvokeFunctions =
|
||
{
|
||
RESERVED,
|
||
RESERVED,
|
||
RESERVED,
|
||
|
||
_Jv_JNI_DestroyJavaVM,
|
||
_Jv_JNI_AttachCurrentThread,
|
||
_Jv_JNI_DetachCurrentThread,
|
||
_Jv_JNI_GetEnv
|
||
};
|