--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/hotspot/src/share/vm/prims/unsafe.cpp Sat Dec 01 00:00:00 2007 +0000
@@ -0,0 +1,1338 @@
+/*
+ * Copyright 2000-2007 Sun Microsystems, Inc. All Rights Reserved.
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
+ * CA 95054 USA or visit www.sun.com if you need additional information or
+ * have any questions.
+ *
+ */
+
+/*
+ * Implementation of class sun.misc.Unsafe
+ */
+
+#include "incls/_precompiled.incl"
+#include "incls/_unsafe.cpp.incl"
+
+#define MAX_OBJECT_SIZE \
+ ( arrayOopDesc::header_size(T_DOUBLE) * HeapWordSize \
+ + ((julong)max_jint * sizeof(double)) )
+
+
+#define UNSAFE_ENTRY(result_type, header) \
+ JVM_ENTRY(result_type, header)
+
+// Can't use UNSAFE_LEAF because it has the signature of a straight
+// call into the runtime (just like JVM_LEAF, funny that) but it's
+// called like a Java Native and thus the wrapper built for it passes
+// arguments like a JNI call. It expects those arguments to be popped
+// from the stack on Intel like all good JNI args are, and adjusts the
+// stack according. Since the JVM_LEAF call expects no extra
+// arguments the stack isn't popped in the C code, is pushed by the
+// wrapper and we get sick.
+//#define UNSAFE_LEAF(result_type, header) \
+// JVM_LEAF(result_type, header)
+
+#define UNSAFE_END JVM_END
+
+#define UnsafeWrapper(arg) /*nothing, for the present*/
+
+
+inline void* addr_from_java(jlong addr) {
+ // This assert fails in a variety of ways on 32-bit systems.
+ // It is impossible to predict whether native code that converts
+ // pointers to longs will sign-extend or zero-extend the addresses.
+ //assert(addr == (uintptr_t)addr, "must not be odd high bits");
+ return (void*)(uintptr_t)addr;
+}
+
+inline jlong addr_to_java(void* p) {
+ assert(p == (void*)(uintptr_t)p, "must not be odd high bits");
+ return (uintptr_t)p;
+}
+
+
+// Note: The VM's obj_field and related accessors use byte-scaled
+// ("unscaled") offsets, just as the unsafe methods do.
+
+// However, the method Unsafe.fieldOffset explicitly declines to
+// guarantee this. The field offset values manipulated by the Java user
+// through the Unsafe API are opaque cookies that just happen to be byte
+// offsets. We represent this state of affairs by passing the cookies
+// through conversion functions when going between the VM and the Unsafe API.
+// The conversion functions just happen to be no-ops at present.
+
+inline jlong field_offset_to_byte_offset(jlong field_offset) {
+ return field_offset;
+}
+
+inline jlong field_offset_from_byte_offset(jlong byte_offset) {
+ return byte_offset;
+}
+
+inline jint invocation_key_from_method_slot(jint slot) {
+ return slot;
+}
+
+inline jint invocation_key_to_method_slot(jint key) {
+ return key;
+}
+
+inline void* index_oop_from_field_offset_long(oop p, jlong field_offset) {
+ jlong byte_offset = field_offset_to_byte_offset(field_offset);
+#ifdef ASSERT
+ if (p != NULL) {
+ assert(byte_offset >= 0 && byte_offset <= (jlong)MAX_OBJECT_SIZE, "sane offset");
+ if (byte_offset == (jint)byte_offset) {
+ void* ptr_plus_disp = (address)p + byte_offset;
+ assert((void*)p->obj_field_addr((jint)byte_offset) == ptr_plus_disp,
+ "raw [ptr+disp] must be consistent with oop::field_base");
+ }
+ }
+#endif
+ if (sizeof(char*) == sizeof(jint)) // (this constant folds!)
+ return (address)p + (jint) byte_offset;
+ else
+ return (address)p + byte_offset;
+}
+
+// Externally callable versions:
+// (Use these in compiler intrinsics which emulate unsafe primitives.)
+jlong Unsafe_field_offset_to_byte_offset(jlong field_offset) {
+ return field_offset;
+}
+jlong Unsafe_field_offset_from_byte_offset(jlong byte_offset) {
+ return byte_offset;
+}
+jint Unsafe_invocation_key_from_method_slot(jint slot) {
+ return invocation_key_from_method_slot(slot);
+}
+jint Unsafe_invocation_key_to_method_slot(jint key) {
+ return invocation_key_to_method_slot(key);
+}
+
+
+///// Data in the Java heap.
+
+#define GET_FIELD(obj, offset, type_name, v) \
+ oop p = JNIHandles::resolve(obj); \
+ type_name v = *(type_name*)index_oop_from_field_offset_long(p, offset)
+
+#define SET_FIELD(obj, offset, type_name, x) \
+ oop p = JNIHandles::resolve(obj); \
+ *(type_name*)index_oop_from_field_offset_long(p, offset) = x
+
+#define GET_FIELD_VOLATILE(obj, offset, type_name, v) \
+ oop p = JNIHandles::resolve(obj); \
+ volatile type_name v = *(volatile type_name*)index_oop_from_field_offset_long(p, offset)
+
+#define SET_FIELD_VOLATILE(obj, offset, type_name, x) \
+ oop p = JNIHandles::resolve(obj); \
+ *(volatile type_name*)index_oop_from_field_offset_long(p, offset) = x; \
+ OrderAccess::fence();
+
+// Get/SetObject must be special-cased, since it works with handles.
+
+// The xxx140 variants for backward compatibility do not allow a full-width offset.
+UNSAFE_ENTRY(jobject, Unsafe_GetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset))
+ UnsafeWrapper("Unsafe_GetObject");
+ if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException());
+ GET_FIELD(obj, offset, oop, v);
+ return JNIHandles::make_local(env, v);
+UNSAFE_END
+
+UNSAFE_ENTRY(void, Unsafe_SetObject140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jobject x_h))
+ UnsafeWrapper("Unsafe_SetObject");
+ if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException());
+ oop x = JNIHandles::resolve(x_h);
+ //SET_FIELD(obj, offset, oop, x);
+ oop p = JNIHandles::resolve(obj);
+ if (x != NULL) {
+ // If there is a heap base pointer, we are obliged to emit a store barrier.
+ oop_store((oop*)index_oop_from_field_offset_long(p, offset), x);
+ } else {
+ *(oop*)index_oop_from_field_offset_long(p, offset) = x;
+ }
+UNSAFE_END
+
+// The normal variants allow a null base pointer with an arbitrary address.
+// But if the base pointer is non-null, the offset should make some sense.
+// That is, it should be in the range [0, MAX_OBJECT_SIZE].
+UNSAFE_ENTRY(jobject, Unsafe_GetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset))
+ UnsafeWrapper("Unsafe_GetObject");
+ GET_FIELD(obj, offset, oop, v);
+ return JNIHandles::make_local(env, v);
+UNSAFE_END
+
+UNSAFE_ENTRY(void, Unsafe_SetObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h))
+ UnsafeWrapper("Unsafe_SetObject");
+ oop x = JNIHandles::resolve(x_h);
+ oop p = JNIHandles::resolve(obj);
+ oop_store((oop*)index_oop_from_field_offset_long(p, offset), x);
+UNSAFE_END
+
+UNSAFE_ENTRY(jobject, Unsafe_GetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset))
+ UnsafeWrapper("Unsafe_GetObjectVolatile");
+ GET_FIELD_VOLATILE(obj, offset, oop, v);
+ return JNIHandles::make_local(env, v);
+UNSAFE_END
+
+UNSAFE_ENTRY(void, Unsafe_SetObjectVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h))
+ UnsafeWrapper("Unsafe_SetObjectVolatile");
+ oop x = JNIHandles::resolve(x_h);
+ oop p = JNIHandles::resolve(obj);
+ oop_store((oop*)index_oop_from_field_offset_long(p, offset), x);
+ OrderAccess::fence();
+UNSAFE_END
+
+// Volatile long versions must use locks if !VM_Version::supports_cx8().
+// support_cx8 is a surrogate for 'supports atomic long memory ops'.
+
+UNSAFE_ENTRY(jlong, Unsafe_GetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset))
+ UnsafeWrapper("Unsafe_GetLongVolatile");
+ {
+ if (VM_Version::supports_cx8()) {
+ GET_FIELD_VOLATILE(obj, offset, jlong, v);
+ return v;
+ }
+ else {
+ Handle p (THREAD, JNIHandles::resolve(obj));
+ jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset));
+ ObjectLocker ol(p, THREAD);
+ jlong value = *addr;
+ return value;
+ }
+ }
+UNSAFE_END
+
+UNSAFE_ENTRY(void, Unsafe_SetLongVolatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x))
+ UnsafeWrapper("Unsafe_SetLongVolatile");
+ {
+ if (VM_Version::supports_cx8()) {
+ SET_FIELD_VOLATILE(obj, offset, jlong, x);
+ }
+ else {
+ Handle p (THREAD, JNIHandles::resolve(obj));
+ jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset));
+ ObjectLocker ol(p, THREAD);
+ *addr = x;
+ }
+ }
+UNSAFE_END
+
+
+#define DEFINE_GETSETOOP(jboolean, Boolean) \
+ \
+UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset)) \
+ UnsafeWrapper("Unsafe_Get"#Boolean); \
+ if (obj == NULL) THROW_0(vmSymbols::java_lang_NullPointerException()); \
+ GET_FIELD(obj, offset, jboolean, v); \
+ return v; \
+UNSAFE_END \
+ \
+UNSAFE_ENTRY(void, Unsafe_Set##Boolean##140(JNIEnv *env, jobject unsafe, jobject obj, jint offset, jboolean x)) \
+ UnsafeWrapper("Unsafe_Set"#Boolean); \
+ if (obj == NULL) THROW(vmSymbols::java_lang_NullPointerException()); \
+ SET_FIELD(obj, offset, jboolean, x); \
+UNSAFE_END \
+ \
+UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \
+ UnsafeWrapper("Unsafe_Get"#Boolean); \
+ GET_FIELD(obj, offset, jboolean, v); \
+ return v; \
+UNSAFE_END \
+ \
+UNSAFE_ENTRY(void, Unsafe_Set##Boolean(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \
+ UnsafeWrapper("Unsafe_Set"#Boolean); \
+ SET_FIELD(obj, offset, jboolean, x); \
+UNSAFE_END \
+ \
+// END DEFINE_GETSETOOP.
+
+
+#define DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean) \
+ \
+UNSAFE_ENTRY(jboolean, Unsafe_Get##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset)) \
+ UnsafeWrapper("Unsafe_Get"#Boolean); \
+ GET_FIELD_VOLATILE(obj, offset, jboolean, v); \
+ return v; \
+UNSAFE_END \
+ \
+UNSAFE_ENTRY(void, Unsafe_Set##Boolean##Volatile(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jboolean x)) \
+ UnsafeWrapper("Unsafe_Set"#Boolean); \
+ SET_FIELD_VOLATILE(obj, offset, jboolean, x); \
+UNSAFE_END \
+ \
+// END DEFINE_GETSETOOP_VOLATILE.
+
+DEFINE_GETSETOOP(jboolean, Boolean)
+DEFINE_GETSETOOP(jbyte, Byte)
+DEFINE_GETSETOOP(jshort, Short);
+DEFINE_GETSETOOP(jchar, Char);
+DEFINE_GETSETOOP(jint, Int);
+DEFINE_GETSETOOP(jlong, Long);
+DEFINE_GETSETOOP(jfloat, Float);
+DEFINE_GETSETOOP(jdouble, Double);
+
+DEFINE_GETSETOOP_VOLATILE(jboolean, Boolean)
+DEFINE_GETSETOOP_VOLATILE(jbyte, Byte)
+DEFINE_GETSETOOP_VOLATILE(jshort, Short);
+DEFINE_GETSETOOP_VOLATILE(jchar, Char);
+DEFINE_GETSETOOP_VOLATILE(jint, Int);
+// no long -- handled specially
+DEFINE_GETSETOOP_VOLATILE(jfloat, Float);
+DEFINE_GETSETOOP_VOLATILE(jdouble, Double);
+
+#undef DEFINE_GETSETOOP
+
+// The non-intrinsified versions of setOrdered just use setVolatile
+
+UNSAFE_ENTRY(void, Unsafe_SetOrderedInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint x)) \
+ UnsafeWrapper("Unsafe_SetOrderedInt"); \
+ SET_FIELD_VOLATILE(obj, offset, jint, x); \
+UNSAFE_END
+
+UNSAFE_ENTRY(void, Unsafe_SetOrderedObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject x_h))
+ UnsafeWrapper("Unsafe_SetOrderedObject");
+ oop x = JNIHandles::resolve(x_h);
+ oop p = JNIHandles::resolve(obj);
+ oop_store((oop*)index_oop_from_field_offset_long(p, offset), x);
+ OrderAccess::fence();
+UNSAFE_END
+
+UNSAFE_ENTRY(void, Unsafe_SetOrderedLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong x))
+ UnsafeWrapper("Unsafe_SetOrderedLong");
+ {
+ if (VM_Version::supports_cx8()) {
+ SET_FIELD_VOLATILE(obj, offset, jlong, x);
+ }
+ else {
+ Handle p (THREAD, JNIHandles::resolve(obj));
+ jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset));
+ ObjectLocker ol(p, THREAD);
+ *addr = x;
+ }
+ }
+UNSAFE_END
+
+////// Data in the C heap.
+
+// Note: These do not throw NullPointerException for bad pointers.
+// They just crash. Only a oop base pointer can generate a NullPointerException.
+//
+#define DEFINE_GETSETNATIVE(java_type, Type, native_type) \
+ \
+UNSAFE_ENTRY(java_type, Unsafe_GetNative##Type(JNIEnv *env, jobject unsafe, jlong addr)) \
+ UnsafeWrapper("Unsafe_GetNative"#Type); \
+ void* p = addr_from_java(addr); \
+ JavaThread* t = JavaThread::current(); \
+ t->set_doing_unsafe_access(true); \
+ java_type x = *(volatile native_type*)p; \
+ t->set_doing_unsafe_access(false); \
+ return x; \
+UNSAFE_END \
+ \
+UNSAFE_ENTRY(void, Unsafe_SetNative##Type(JNIEnv *env, jobject unsafe, jlong addr, java_type x)) \
+ UnsafeWrapper("Unsafe_SetNative"#Type); \
+ JavaThread* t = JavaThread::current(); \
+ t->set_doing_unsafe_access(true); \
+ void* p = addr_from_java(addr); \
+ *(volatile native_type*)p = x; \
+ t->set_doing_unsafe_access(false); \
+UNSAFE_END \
+ \
+// END DEFINE_GETSETNATIVE.
+
+DEFINE_GETSETNATIVE(jbyte, Byte, signed char)
+DEFINE_GETSETNATIVE(jshort, Short, signed short);
+DEFINE_GETSETNATIVE(jchar, Char, unsigned short);
+DEFINE_GETSETNATIVE(jint, Int, jint);
+// no long -- handled specially
+DEFINE_GETSETNATIVE(jfloat, Float, float);
+DEFINE_GETSETNATIVE(jdouble, Double, double);
+
+#undef DEFINE_GETSETNATIVE
+
+UNSAFE_ENTRY(jlong, Unsafe_GetNativeLong(JNIEnv *env, jobject unsafe, jlong addr))
+ UnsafeWrapper("Unsafe_GetNativeLong");
+ JavaThread* t = JavaThread::current();
+ // We do it this way to avoid problems with access to heap using 64
+ // bit loads, as jlong in heap could be not 64-bit aligned, and on
+ // some CPUs (SPARC) it leads to SIGBUS.
+ t->set_doing_unsafe_access(true);
+ void* p = addr_from_java(addr);
+ jlong x;
+ if (((intptr_t)p & 7) == 0) {
+ // jlong is aligned, do a volatile access
+ x = *(volatile jlong*)p;
+ } else {
+ jlong_accessor acc;
+ acc.words[0] = ((volatile jint*)p)[0];
+ acc.words[1] = ((volatile jint*)p)[1];
+ x = acc.long_value;
+ }
+ t->set_doing_unsafe_access(false);
+ return x;
+UNSAFE_END
+
+UNSAFE_ENTRY(void, Unsafe_SetNativeLong(JNIEnv *env, jobject unsafe, jlong addr, jlong x))
+ UnsafeWrapper("Unsafe_SetNativeLong");
+ JavaThread* t = JavaThread::current();
+ // see comment for Unsafe_GetNativeLong
+ t->set_doing_unsafe_access(true);
+ void* p = addr_from_java(addr);
+ if (((intptr_t)p & 7) == 0) {
+ // jlong is aligned, do a volatile access
+ *(volatile jlong*)p = x;
+ } else {
+ jlong_accessor acc;
+ acc.long_value = x;
+ ((volatile jint*)p)[0] = acc.words[0];
+ ((volatile jint*)p)[1] = acc.words[1];
+ }
+ t->set_doing_unsafe_access(false);
+UNSAFE_END
+
+
+UNSAFE_ENTRY(jlong, Unsafe_GetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr))
+ UnsafeWrapper("Unsafe_GetNativeAddress");
+ void* p = addr_from_java(addr);
+ return addr_to_java(*(void**)p);
+UNSAFE_END
+
+UNSAFE_ENTRY(void, Unsafe_SetNativeAddress(JNIEnv *env, jobject unsafe, jlong addr, jlong x))
+ UnsafeWrapper("Unsafe_SetNativeAddress");
+ void* p = addr_from_java(addr);
+ *(void**)p = addr_from_java(x);
+UNSAFE_END
+
+
+////// Allocation requests
+
+UNSAFE_ENTRY(jobject, Unsafe_AllocateInstance(JNIEnv *env, jobject unsafe, jclass cls))
+ UnsafeWrapper("Unsafe_AllocateInstance");
+ {
+ ThreadToNativeFromVM ttnfv(thread);
+ return env->AllocObject(cls);
+ }
+UNSAFE_END
+
+UNSAFE_ENTRY(jlong, Unsafe_AllocateMemory(JNIEnv *env, jobject unsafe, jlong size))
+ UnsafeWrapper("Unsafe_AllocateMemory");
+ size_t sz = (size_t)size;
+ if (sz != (julong)size || size < 0) {
+ THROW_0(vmSymbols::java_lang_IllegalArgumentException());
+ }
+ if (sz == 0) {
+ return 0;
+ }
+ sz = round_to(sz, HeapWordSize);
+ void* x = os::malloc(sz);
+ if (x == NULL) {
+ THROW_0(vmSymbols::java_lang_OutOfMemoryError());
+ }
+ //Copy::fill_to_words((HeapWord*)x, sz / HeapWordSize);
+ return addr_to_java(x);
+UNSAFE_END
+
+UNSAFE_ENTRY(jlong, Unsafe_ReallocateMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size))
+ UnsafeWrapper("Unsafe_ReallocateMemory");
+ void* p = addr_from_java(addr);
+ size_t sz = (size_t)size;
+ if (sz != (julong)size || size < 0) {
+ THROW_0(vmSymbols::java_lang_IllegalArgumentException());
+ }
+ if (sz == 0) {
+ os::free(p);
+ return 0;
+ }
+ sz = round_to(sz, HeapWordSize);
+ void* x = (p == NULL) ? os::malloc(sz) : os::realloc(p, sz);
+ if (x == NULL) {
+ THROW_0(vmSymbols::java_lang_OutOfMemoryError());
+ }
+ return addr_to_java(x);
+UNSAFE_END
+
+UNSAFE_ENTRY(void, Unsafe_FreeMemory(JNIEnv *env, jobject unsafe, jlong addr))
+ UnsafeWrapper("Unsafe_FreeMemory");
+ void* p = addr_from_java(addr);
+ if (p == NULL) {
+ return;
+ }
+ os::free(p);
+UNSAFE_END
+
+UNSAFE_ENTRY(void, Unsafe_SetMemory(JNIEnv *env, jobject unsafe, jlong addr, jlong size, jbyte value))
+ UnsafeWrapper("Unsafe_SetMemory");
+ size_t sz = (size_t)size;
+ if (sz != (julong)size || size < 0) {
+ THROW(vmSymbols::java_lang_IllegalArgumentException());
+ }
+ char* p = (char*) addr_from_java(addr);
+ Copy::fill_to_memory_atomic(p, sz, value);
+UNSAFE_END
+
+UNSAFE_ENTRY(void, Unsafe_SetMemory2(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong size, jbyte value))
+ UnsafeWrapper("Unsafe_SetMemory");
+ size_t sz = (size_t)size;
+ if (sz != (julong)size || size < 0) {
+ THROW(vmSymbols::java_lang_IllegalArgumentException());
+ }
+ oop base = JNIHandles::resolve(obj);
+ void* p = index_oop_from_field_offset_long(base, offset);
+ Copy::fill_to_memory_atomic(p, sz, value);
+UNSAFE_END
+
+UNSAFE_ENTRY(void, Unsafe_CopyMemory(JNIEnv *env, jobject unsafe, jlong srcAddr, jlong dstAddr, jlong size))
+ UnsafeWrapper("Unsafe_CopyMemory");
+ if (size == 0) {
+ return;
+ }
+ size_t sz = (size_t)size;
+ if (sz != (julong)size || size < 0) {
+ THROW(vmSymbols::java_lang_IllegalArgumentException());
+ }
+ void* src = addr_from_java(srcAddr);
+ void* dst = addr_from_java(dstAddr);
+ Copy::conjoint_memory_atomic(src, dst, sz);
+UNSAFE_END
+
+UNSAFE_ENTRY(void, Unsafe_CopyMemory2(JNIEnv *env, jobject unsafe, jobject srcObj, jlong srcOffset, jobject dstObj, jlong dstOffset, jlong size))
+ UnsafeWrapper("Unsafe_CopyMemory");
+ if (size == 0) {
+ return;
+ }
+ size_t sz = (size_t)size;
+ if (sz != (julong)size || size < 0) {
+ THROW(vmSymbols::java_lang_IllegalArgumentException());
+ }
+ oop srcp = JNIHandles::resolve(srcObj);
+ oop dstp = JNIHandles::resolve(dstObj);
+ if (dstp != NULL && !dstp->is_typeArray()) {
+ // NYI: This works only for non-oop arrays at present.
+ // Generalizing it would be reasonable, but requires card marking.
+ // Also, autoboxing a Long from 0L in copyMemory(x,y, 0L,z, n) would be bad.
+ THROW(vmSymbols::java_lang_IllegalArgumentException());
+ }
+ void* src = index_oop_from_field_offset_long(srcp, srcOffset);
+ void* dst = index_oop_from_field_offset_long(dstp, dstOffset);
+ Copy::conjoint_memory_atomic(src, dst, sz);
+UNSAFE_END
+
+
+////// Random queries
+
+// See comment at file start about UNSAFE_LEAF
+//UNSAFE_LEAF(jint, Unsafe_AddressSize())
+UNSAFE_ENTRY(jint, Unsafe_AddressSize(JNIEnv *env, jobject unsafe))
+ UnsafeWrapper("Unsafe_AddressSize");
+ return sizeof(void*);
+UNSAFE_END
+
+// See comment at file start about UNSAFE_LEAF
+//UNSAFE_LEAF(jint, Unsafe_PageSize())
+UNSAFE_ENTRY(jint, Unsafe_PageSize(JNIEnv *env, jobject unsafe))
+ UnsafeWrapper("Unsafe_PageSize");
+ return os::vm_page_size();
+UNSAFE_END
+
+jint find_field_offset(jobject field, int must_be_static, TRAPS) {
+ if (field == NULL) {
+ THROW_0(vmSymbols::java_lang_NullPointerException());
+ }
+
+ oop reflected = JNIHandles::resolve_non_null(field);
+ oop mirror = java_lang_reflect_Field::clazz(reflected);
+ klassOop k = java_lang_Class::as_klassOop(mirror);
+ int slot = java_lang_reflect_Field::slot(reflected);
+ int modifiers = java_lang_reflect_Field::modifiers(reflected);
+
+ if (must_be_static >= 0) {
+ int really_is_static = ((modifiers & JVM_ACC_STATIC) != 0);
+ if (must_be_static != really_is_static) {
+ THROW_0(vmSymbols::java_lang_IllegalArgumentException());
+ }
+ }
+
+ int offset = instanceKlass::cast(k)->offset_from_fields(slot);
+ return field_offset_from_byte_offset(offset);
+}
+
+UNSAFE_ENTRY(jlong, Unsafe_ObjectFieldOffset(JNIEnv *env, jobject unsafe, jobject field))
+ UnsafeWrapper("Unsafe_ObjectFieldOffset");
+ return find_field_offset(field, 0, THREAD);
+UNSAFE_END
+
+UNSAFE_ENTRY(jlong, Unsafe_StaticFieldOffset(JNIEnv *env, jobject unsafe, jobject field))
+ UnsafeWrapper("Unsafe_StaticFieldOffset");
+ return find_field_offset(field, 1, THREAD);
+UNSAFE_END
+
+UNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromField(JNIEnv *env, jobject unsafe, jobject field))
+ UnsafeWrapper("Unsafe_StaticFieldBase");
+ // Note: In this VM implementation, a field address is always a short
+ // offset from the base of a a klass metaobject. Thus, the full dynamic
+ // range of the return type is never used. However, some implementations
+ // might put the static field inside an array shared by many classes,
+ // or even at a fixed address, in which case the address could be quite
+ // large. In that last case, this function would return NULL, since
+ // the address would operate alone, without any base pointer.
+
+ if (field == NULL) THROW_0(vmSymbols::java_lang_NullPointerException());
+
+ oop reflected = JNIHandles::resolve_non_null(field);
+ oop mirror = java_lang_reflect_Field::clazz(reflected);
+ int modifiers = java_lang_reflect_Field::modifiers(reflected);
+
+ if ((modifiers & JVM_ACC_STATIC) == 0) {
+ THROW_0(vmSymbols::java_lang_IllegalArgumentException());
+ }
+
+ return JNIHandles::make_local(env, java_lang_Class::as_klassOop(mirror));
+UNSAFE_END
+
+//@deprecated
+UNSAFE_ENTRY(jint, Unsafe_FieldOffset(JNIEnv *env, jobject unsafe, jobject field))
+ UnsafeWrapper("Unsafe_FieldOffset");
+ // tries (but fails) to be polymorphic between static and non-static:
+ jlong offset = find_field_offset(field, -1, THREAD);
+ guarantee(offset == (jint)offset, "offset fits in 32 bits");
+ return (jint)offset;
+UNSAFE_END
+
+//@deprecated
+UNSAFE_ENTRY(jobject, Unsafe_StaticFieldBaseFromClass(JNIEnv *env, jobject unsafe, jobject clazz))
+ UnsafeWrapper("Unsafe_StaticFieldBase");
+ if (clazz == NULL) {
+ THROW_0(vmSymbols::java_lang_NullPointerException());
+ }
+ return JNIHandles::make_local(env, java_lang_Class::as_klassOop(JNIHandles::resolve_non_null(clazz)));
+UNSAFE_END
+
+UNSAFE_ENTRY(void, Unsafe_EnsureClassInitialized(JNIEnv *env, jobject unsafe, jobject clazz))
+ UnsafeWrapper("Unsafe_EnsureClassInitialized");
+ if (clazz == NULL) {
+ THROW(vmSymbols::java_lang_NullPointerException());
+ }
+ oop mirror = JNIHandles::resolve_non_null(clazz);
+ instanceKlass* k = instanceKlass::cast(java_lang_Class::as_klassOop(mirror));
+ if (k != NULL) {
+ k->initialize(CHECK);
+ }
+UNSAFE_END
+
+static void getBaseAndScale(int& base, int& scale, jclass acls, TRAPS) {
+ if (acls == NULL) {
+ THROW(vmSymbols::java_lang_NullPointerException());
+ }
+ oop mirror = JNIHandles::resolve_non_null(acls);
+ klassOop k = java_lang_Class::as_klassOop(mirror);
+ if (k == NULL || !k->klass_part()->oop_is_array()) {
+ THROW(vmSymbols::java_lang_InvalidClassException());
+ } else if (k->klass_part()->oop_is_objArray()) {
+ base = arrayOopDesc::base_offset_in_bytes(T_OBJECT);
+ scale = oopSize;
+ } else if (k->klass_part()->oop_is_typeArray()) {
+ typeArrayKlass* tak = typeArrayKlass::cast(k);
+ base = tak->array_header_in_bytes();
+ assert(base == arrayOopDesc::base_offset_in_bytes(tak->element_type()), "array_header_size semantics ok");
+ scale = (1 << tak->log2_element_size());
+ } else {
+ ShouldNotReachHere();
+ }
+}
+
+UNSAFE_ENTRY(jint, Unsafe_ArrayBaseOffset(JNIEnv *env, jobject unsafe, jclass acls))
+ UnsafeWrapper("Unsafe_ArrayBaseOffset");
+ int base, scale;
+ getBaseAndScale(base, scale, acls, CHECK_0);
+ return field_offset_from_byte_offset(base);
+UNSAFE_END
+
+
+UNSAFE_ENTRY(jint, Unsafe_ArrayIndexScale(JNIEnv *env, jobject unsafe, jclass acls))
+ UnsafeWrapper("Unsafe_ArrayIndexScale");
+ int base, scale;
+ getBaseAndScale(base, scale, acls, CHECK_0);
+ // This VM packs both fields and array elements down to the byte.
+ // But watch out: If this changes, so that array references for
+ // a given primitive type (say, T_BOOLEAN) use different memory units
+ // than fields, this method MUST return zero for such arrays.
+ // For example, the VM used to store sub-word sized fields in full
+ // words in the object layout, so that accessors like getByte(Object,int)
+ // did not really do what one might expect for arrays. Therefore,
+ // this function used to report a zero scale factor, so that the user
+ // would know not to attempt to access sub-word array elements.
+ // // Code for unpacked fields:
+ // if (scale < wordSize) return 0;
+
+ // The following allows for a pretty general fieldOffset cookie scheme,
+ // but requires it to be linear in byte offset.
+ return field_offset_from_byte_offset(scale) - field_offset_from_byte_offset(0);
+UNSAFE_END
+
+
+static inline void throw_new(JNIEnv *env, const char *ename) {
+ char buf[100];
+ strcpy(buf, "java/lang/");
+ strcat(buf, ename);
+ jclass cls = env->FindClass(buf);
+ char* msg = NULL;
+ env->ThrowNew(cls, msg);
+}
+
+static jclass Unsafe_DefineClass(JNIEnv *env, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd) {
+ {
+ // Code lifted from JDK 1.3 ClassLoader.c
+
+ jbyte *body;
+ char *utfName;
+ jclass result = 0;
+ char buf[128];
+
+ if (UsePerfData) {
+ ClassLoader::unsafe_defineClassCallCounter()->inc();
+ }
+
+ if (data == NULL) {
+ throw_new(env, "NullPointerException");
+ return 0;
+ }
+
+ /* Work around 4153825. malloc crashes on Solaris when passed a
+ * negative size.
+ */
+ if (length < 0) {
+ throw_new(env, "ArrayIndexOutOfBoundsException");
+ return 0;
+ }
+
+ body = NEW_C_HEAP_ARRAY(jbyte, length);
+
+ if (body == 0) {
+ throw_new(env, "OutOfMemoryError");
+ return 0;
+ }
+
+ env->GetByteArrayRegion(data, offset, length, body);
+
+ if (env->ExceptionOccurred())
+ goto free_body;
+
+ if (name != NULL) {
+ uint len = env->GetStringUTFLength(name);
+ int unicode_len = env->GetStringLength(name);
+ if (len >= sizeof(buf)) {
+ utfName = NEW_C_HEAP_ARRAY(char, len + 1);
+ if (utfName == NULL) {
+ throw_new(env, "OutOfMemoryError");
+ goto free_body;
+ }
+ } else {
+ utfName = buf;
+ }
+ env->GetStringUTFRegion(name, 0, unicode_len, utfName);
+ //VerifyFixClassname(utfName);
+ for (uint i = 0; i < len; i++) {
+ if (utfName[i] == '.') utfName[i] = '/';
+ }
+ } else {
+ utfName = NULL;
+ }
+
+ result = JVM_DefineClass(env, utfName, loader, body, length, pd);
+
+ if (utfName && utfName != buf)
+ FREE_C_HEAP_ARRAY(char, utfName);
+
+ free_body:
+ FREE_C_HEAP_ARRAY(jbyte, body);
+ return result;
+ }
+}
+
+
+UNSAFE_ENTRY(jclass, Unsafe_DefineClass0(JNIEnv *env, jobject unsafe, jstring name, jbyteArray data, int offset, int length))
+ UnsafeWrapper("Unsafe_DefineClass");
+ {
+ ThreadToNativeFromVM ttnfv(thread);
+
+ int depthFromDefineClass0 = 1;
+ jclass caller = JVM_GetCallerClass(env, depthFromDefineClass0);
+ jobject loader = (caller == NULL) ? NULL : JVM_GetClassLoader(env, caller);
+ jobject pd = (caller == NULL) ? NULL : JVM_GetProtectionDomain(env, caller);
+
+ return Unsafe_DefineClass(env, name, data, offset, length, loader, pd);
+ }
+UNSAFE_END
+
+
+UNSAFE_ENTRY(jclass, Unsafe_DefineClass1(JNIEnv *env, jobject unsafe, jstring name, jbyteArray data, int offset, int length, jobject loader, jobject pd))
+ UnsafeWrapper("Unsafe_DefineClass");
+ {
+ ThreadToNativeFromVM ttnfv(thread);
+
+ return Unsafe_DefineClass(env, name, data, offset, length, loader, pd);
+ }
+UNSAFE_END
+
+
+UNSAFE_ENTRY(void, Unsafe_MonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj))
+ UnsafeWrapper("Unsafe_MonitorEnter");
+ {
+ if (jobj == NULL) {
+ THROW(vmSymbols::java_lang_NullPointerException());
+ }
+ Handle obj(thread, JNIHandles::resolve_non_null(jobj));
+ ObjectSynchronizer::jni_enter(obj, CHECK);
+ }
+UNSAFE_END
+
+
+UNSAFE_ENTRY(jboolean, Unsafe_TryMonitorEnter(JNIEnv *env, jobject unsafe, jobject jobj))
+ UnsafeWrapper("Unsafe_TryMonitorEnter");
+ {
+ if (jobj == NULL) {
+ THROW_(vmSymbols::java_lang_NullPointerException(), JNI_FALSE);
+ }
+ Handle obj(thread, JNIHandles::resolve_non_null(jobj));
+ bool res = ObjectSynchronizer::jni_try_enter(obj, CHECK_0);
+ return (res ? JNI_TRUE : JNI_FALSE);
+ }
+UNSAFE_END
+
+
+UNSAFE_ENTRY(void, Unsafe_MonitorExit(JNIEnv *env, jobject unsafe, jobject jobj))
+ UnsafeWrapper("Unsafe_MonitorExit");
+ {
+ if (jobj == NULL) {
+ THROW(vmSymbols::java_lang_NullPointerException());
+ }
+ Handle obj(THREAD, JNIHandles::resolve_non_null(jobj));
+ ObjectSynchronizer::jni_exit(obj(), CHECK);
+ }
+UNSAFE_END
+
+
+UNSAFE_ENTRY(void, Unsafe_ThrowException(JNIEnv *env, jobject unsafe, jthrowable thr))
+ UnsafeWrapper("Unsafe_ThrowException");
+ {
+ ThreadToNativeFromVM ttnfv(thread);
+ env->Throw(thr);
+ }
+UNSAFE_END
+
+// JSR166 ------------------------------------------------------------------
+
+UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapObject(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jobject e_h, jobject x_h))
+ UnsafeWrapper("Unsafe_CompareAndSwapObject");
+ oop x = JNIHandles::resolve(x_h);
+ oop e = JNIHandles::resolve(e_h);
+ oop p = JNIHandles::resolve(obj);
+ intptr_t* addr = (intptr_t *)index_oop_from_field_offset_long(p, offset);
+ intptr_t res = Atomic::cmpxchg_ptr((intptr_t)x, addr, (intptr_t)e);
+ jboolean success = (res == (intptr_t)e);
+ if (success)
+ update_barrier_set((oop*)addr, x);
+ return success;
+UNSAFE_END
+
+UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapInt(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jint e, jint x))
+ UnsafeWrapper("Unsafe_CompareAndSwapInt");
+ oop p = JNIHandles::resolve(obj);
+ jint* addr = (jint *) index_oop_from_field_offset_long(p, offset);
+ return (jint)(Atomic::cmpxchg(x, addr, e)) == e;
+UNSAFE_END
+
+UNSAFE_ENTRY(jboolean, Unsafe_CompareAndSwapLong(JNIEnv *env, jobject unsafe, jobject obj, jlong offset, jlong e, jlong x))
+ UnsafeWrapper("Unsafe_CompareAndSwapLong");
+ Handle p (THREAD, JNIHandles::resolve(obj));
+ jlong* addr = (jlong*)(index_oop_from_field_offset_long(p(), offset));
+ if (VM_Version::supports_cx8())
+ return (jlong)(Atomic::cmpxchg(x, addr, e)) == e;
+ else {
+ jboolean success = false;
+ ObjectLocker ol(p, THREAD);
+ if (*addr == e) { *addr = x; success = true; }
+ return success;
+ }
+UNSAFE_END
+
+UNSAFE_ENTRY(void, Unsafe_Park(JNIEnv *env, jobject unsafe, jboolean isAbsolute, jlong time))
+ UnsafeWrapper("Unsafe_Park");
+ JavaThreadParkedState jtps(thread, time != 0);
+ thread->parker()->park(isAbsolute != 0, time);
+UNSAFE_END
+
+UNSAFE_ENTRY(void, Unsafe_Unpark(JNIEnv *env, jobject unsafe, jobject jthread))
+ UnsafeWrapper("Unsafe_Unpark");
+ Parker* p = NULL;
+ if (jthread != NULL) {
+ oop java_thread = JNIHandles::resolve_non_null(jthread);
+ if (java_thread != NULL) {
+ jlong lp = java_lang_Thread::park_event(java_thread);
+ if (lp != 0) {
+ // This cast is OK even though the jlong might have been read
+ // non-atomically on 32bit systems, since there, one word will
+ // always be zero anyway and the value set is always the same
+ p = (Parker*)addr_from_java(lp);
+ } else {
+ // Grab lock if apparently null or using older version of library
+ MutexLocker mu(Threads_lock);
+ java_thread = JNIHandles::resolve_non_null(jthread);
+ if (java_thread != NULL) {
+ JavaThread* thr = java_lang_Thread::thread(java_thread);
+ if (thr != NULL) {
+ p = thr->parker();
+ if (p != NULL) { // Bind to Java thread for next time.
+ java_lang_Thread::set_park_event(java_thread, addr_to_java(p));
+ }
+ }
+ }
+ }
+ }
+ }
+ if (p != NULL) {
+ p->unpark();
+ }
+UNSAFE_END
+
+UNSAFE_ENTRY(jint, Unsafe_Loadavg(JNIEnv *env, jobject unsafe, jdoubleArray loadavg, jint nelem))
+ UnsafeWrapper("Unsafe_Loadavg");
+ const int max_nelem = 3;
+ double la[max_nelem];
+ jint ret;
+
+ typeArrayOop a = typeArrayOop(JNIHandles::resolve_non_null(loadavg));
+ assert(a->is_typeArray(), "must be type array");
+
+ if (nelem < 0 || nelem > max_nelem || a->length() < nelem) {
+ ThreadToNativeFromVM ttnfv(thread);
+ throw_new(env, "ArrayIndexOutOfBoundsException");
+ return -1;
+ }
+
+ ret = os::loadavg(la, nelem);
+ if (ret == -1) return -1;
+
+ // if successful, ret is the number of samples actually retrieved.
+ assert(ret >= 0 && ret <= max_nelem, "Unexpected loadavg return value");
+ switch(ret) {
+ case 3: a->double_at_put(2, (jdouble)la[2]); // fall through
+ case 2: a->double_at_put(1, (jdouble)la[1]); // fall through
+ case 1: a->double_at_put(0, (jdouble)la[0]); break;
+ }
+ return ret;
+UNSAFE_END
+
+UNSAFE_ENTRY(void, Unsafe_PrefetchRead(JNIEnv* env, jclass ignored, jobject obj, jlong offset))
+ UnsafeWrapper("Unsafe_PrefetchRead");
+ oop p = JNIHandles::resolve(obj);
+ void* addr = index_oop_from_field_offset_long(p, 0);
+ Prefetch::read(addr, (intx)offset);
+UNSAFE_END
+
+UNSAFE_ENTRY(void, Unsafe_PrefetchWrite(JNIEnv* env, jclass ignored, jobject obj, jlong offset))
+ UnsafeWrapper("Unsafe_PrefetchWrite");
+ oop p = JNIHandles::resolve(obj);
+ void* addr = index_oop_from_field_offset_long(p, 0);
+ Prefetch::write(addr, (intx)offset);
+UNSAFE_END
+
+
+/// JVM_RegisterUnsafeMethods
+
+#define ADR "J"
+
+#define LANG "Ljava/lang/"
+
+#define OBJ LANG"Object;"
+#define CLS LANG"Class;"
+#define CTR LANG"reflect/Constructor;"
+#define FLD LANG"reflect/Field;"
+#define MTH LANG"reflect/Method;"
+#define THR LANG"Throwable;"
+
+#define DC0_Args LANG"String;[BII"
+#define DC1_Args DC0_Args LANG"ClassLoader;" "Ljava/security/ProtectionDomain;"
+
+#define CC (char*) /*cast a literal from (const char*)*/
+#define FN_PTR(f) CAST_FROM_FN_PTR(void*, &f)
+
+// define deprecated accessors for compabitility with 1.4.0
+#define DECLARE_GETSETOOP_140(Boolean, Z) \
+ {CC"get"#Boolean, CC"("OBJ"I)"#Z, FN_PTR(Unsafe_Get##Boolean##140)}, \
+ {CC"put"#Boolean, CC"("OBJ"I"#Z")V", FN_PTR(Unsafe_Set##Boolean##140)}
+
+// Note: In 1.4.1, getObject and kin take both int and long offsets.
+#define DECLARE_GETSETOOP_141(Boolean, Z) \
+ {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \
+ {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)}
+
+// Note: In 1.5.0, there are volatile versions too
+#define DECLARE_GETSETOOP(Boolean, Z) \
+ {CC"get"#Boolean, CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean)}, \
+ {CC"put"#Boolean, CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean)}, \
+ {CC"get"#Boolean"Volatile", CC"("OBJ"J)"#Z, FN_PTR(Unsafe_Get##Boolean##Volatile)}, \
+ {CC"put"#Boolean"Volatile", CC"("OBJ"J"#Z")V", FN_PTR(Unsafe_Set##Boolean##Volatile)}
+
+
+#define DECLARE_GETSETNATIVE(Byte, B) \
+ {CC"get"#Byte, CC"("ADR")"#B, FN_PTR(Unsafe_GetNative##Byte)}, \
+ {CC"put"#Byte, CC"("ADR#B")V", FN_PTR(Unsafe_SetNative##Byte)}
+
+
+
+// %%% These are temporarily supported until the SDK sources
+// contain the necessarily updated Unsafe.java.
+static JNINativeMethod methods_140[] = {
+
+ {CC"getObject", CC"("OBJ"I)"OBJ"", FN_PTR(Unsafe_GetObject140)},
+ {CC"putObject", CC"("OBJ"I"OBJ")V", FN_PTR(Unsafe_SetObject140)},
+
+ DECLARE_GETSETOOP_140(Boolean, Z),
+ DECLARE_GETSETOOP_140(Byte, B),
+ DECLARE_GETSETOOP_140(Short, S),
+ DECLARE_GETSETOOP_140(Char, C),
+ DECLARE_GETSETOOP_140(Int, I),
+ DECLARE_GETSETOOP_140(Long, J),
+ DECLARE_GETSETOOP_140(Float, F),
+ DECLARE_GETSETOOP_140(Double, D),
+
+ DECLARE_GETSETNATIVE(Byte, B),
+ DECLARE_GETSETNATIVE(Short, S),
+ DECLARE_GETSETNATIVE(Char, C),
+ DECLARE_GETSETNATIVE(Int, I),
+ DECLARE_GETSETNATIVE(Long, J),
+ DECLARE_GETSETNATIVE(Float, F),
+ DECLARE_GETSETNATIVE(Double, D),
+
+ {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)},
+ {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)},
+
+ {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)},
+ {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)},
+// {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)},
+// {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)},
+ {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)},
+
+ {CC"fieldOffset", CC"("FLD")I", FN_PTR(Unsafe_FieldOffset)}, //deprecated
+ {CC"staticFieldBase", CC"("CLS")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromClass)}, //deprecated
+ {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)},
+ {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)},
+ {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)},
+ {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)},
+ {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)},
+
+ {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)},
+ {CC"defineClass", CC"("DC1_Args")"CLS, FN_PTR(Unsafe_DefineClass1)},
+ {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)},
+ {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)},
+ {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)},
+ {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}
+};
+
+// These are the old methods prior to the JSR 166 changes in 1.5.0
+static JNINativeMethod methods_141[] = {
+
+ {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)},
+ {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)},
+
+ DECLARE_GETSETOOP_141(Boolean, Z),
+ DECLARE_GETSETOOP_141(Byte, B),
+ DECLARE_GETSETOOP_141(Short, S),
+ DECLARE_GETSETOOP_141(Char, C),
+ DECLARE_GETSETOOP_141(Int, I),
+ DECLARE_GETSETOOP_141(Long, J),
+ DECLARE_GETSETOOP_141(Float, F),
+ DECLARE_GETSETOOP_141(Double, D),
+
+ DECLARE_GETSETNATIVE(Byte, B),
+ DECLARE_GETSETNATIVE(Short, S),
+ DECLARE_GETSETNATIVE(Char, C),
+ DECLARE_GETSETNATIVE(Int, I),
+ DECLARE_GETSETNATIVE(Long, J),
+ DECLARE_GETSETNATIVE(Float, F),
+ DECLARE_GETSETNATIVE(Double, D),
+
+ {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)},
+ {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)},
+
+ {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)},
+ {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)},
+// {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)},
+// {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)},
+ {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)},
+
+ {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)},
+ {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)},
+ {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)},
+ {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)},
+ {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)},
+ {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)},
+ {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)},
+ {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)},
+
+ {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)},
+ {CC"defineClass", CC"("DC1_Args")"CLS, FN_PTR(Unsafe_DefineClass1)},
+ {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)},
+ {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)},
+ {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)},
+ {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)}
+
+};
+
+// These are the old methods prior to the JSR 166 changes in 1.6.0
+static JNINativeMethod methods_15[] = {
+
+ {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)},
+ {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)},
+ {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)},
+ {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)},
+
+
+ DECLARE_GETSETOOP(Boolean, Z),
+ DECLARE_GETSETOOP(Byte, B),
+ DECLARE_GETSETOOP(Short, S),
+ DECLARE_GETSETOOP(Char, C),
+ DECLARE_GETSETOOP(Int, I),
+ DECLARE_GETSETOOP(Long, J),
+ DECLARE_GETSETOOP(Float, F),
+ DECLARE_GETSETOOP(Double, D),
+
+ DECLARE_GETSETNATIVE(Byte, B),
+ DECLARE_GETSETNATIVE(Short, S),
+ DECLARE_GETSETNATIVE(Char, C),
+ DECLARE_GETSETNATIVE(Int, I),
+ DECLARE_GETSETNATIVE(Long, J),
+ DECLARE_GETSETNATIVE(Float, F),
+ DECLARE_GETSETNATIVE(Double, D),
+
+ {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)},
+ {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)},
+
+ {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)},
+ {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)},
+// {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)},
+// {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)},
+ {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)},
+
+ {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)},
+ {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)},
+ {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)},
+ {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)},
+ {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)},
+ {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)},
+ {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)},
+ {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)},
+
+ {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)},
+ {CC"defineClass", CC"("DC1_Args")"CLS, FN_PTR(Unsafe_DefineClass1)},
+ {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)},
+ {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)},
+ {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)},
+ {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)},
+ {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)},
+ {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)},
+ {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)},
+ {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)},
+ {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)}
+
+};
+
+// These are the correct methods, moving forward:
+static JNINativeMethod methods[] = {
+
+ {CC"getObject", CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObject)},
+ {CC"putObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObject)},
+ {CC"getObjectVolatile",CC"("OBJ"J)"OBJ"", FN_PTR(Unsafe_GetObjectVolatile)},
+ {CC"putObjectVolatile",CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetObjectVolatile)},
+
+
+ DECLARE_GETSETOOP(Boolean, Z),
+ DECLARE_GETSETOOP(Byte, B),
+ DECLARE_GETSETOOP(Short, S),
+ DECLARE_GETSETOOP(Char, C),
+ DECLARE_GETSETOOP(Int, I),
+ DECLARE_GETSETOOP(Long, J),
+ DECLARE_GETSETOOP(Float, F),
+ DECLARE_GETSETOOP(Double, D),
+
+ DECLARE_GETSETNATIVE(Byte, B),
+ DECLARE_GETSETNATIVE(Short, S),
+ DECLARE_GETSETNATIVE(Char, C),
+ DECLARE_GETSETNATIVE(Int, I),
+ DECLARE_GETSETNATIVE(Long, J),
+ DECLARE_GETSETNATIVE(Float, F),
+ DECLARE_GETSETNATIVE(Double, D),
+
+ {CC"getAddress", CC"("ADR")"ADR, FN_PTR(Unsafe_GetNativeAddress)},
+ {CC"putAddress", CC"("ADR""ADR")V", FN_PTR(Unsafe_SetNativeAddress)},
+
+ {CC"allocateMemory", CC"(J)"ADR, FN_PTR(Unsafe_AllocateMemory)},
+ {CC"reallocateMemory", CC"("ADR"J)"ADR, FN_PTR(Unsafe_ReallocateMemory)},
+// {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)},
+// {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)},
+ {CC"freeMemory", CC"("ADR")V", FN_PTR(Unsafe_FreeMemory)},
+
+ {CC"objectFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_ObjectFieldOffset)},
+ {CC"staticFieldOffset", CC"("FLD")J", FN_PTR(Unsafe_StaticFieldOffset)},
+ {CC"staticFieldBase", CC"("FLD")"OBJ, FN_PTR(Unsafe_StaticFieldBaseFromField)},
+ {CC"ensureClassInitialized",CC"("CLS")V", FN_PTR(Unsafe_EnsureClassInitialized)},
+ {CC"arrayBaseOffset", CC"("CLS")I", FN_PTR(Unsafe_ArrayBaseOffset)},
+ {CC"arrayIndexScale", CC"("CLS")I", FN_PTR(Unsafe_ArrayIndexScale)},
+ {CC"addressSize", CC"()I", FN_PTR(Unsafe_AddressSize)},
+ {CC"pageSize", CC"()I", FN_PTR(Unsafe_PageSize)},
+
+ {CC"defineClass", CC"("DC0_Args")"CLS, FN_PTR(Unsafe_DefineClass0)},
+ {CC"defineClass", CC"("DC1_Args")"CLS, FN_PTR(Unsafe_DefineClass1)},
+ {CC"allocateInstance", CC"("CLS")"OBJ, FN_PTR(Unsafe_AllocateInstance)},
+ {CC"monitorEnter", CC"("OBJ")V", FN_PTR(Unsafe_MonitorEnter)},
+ {CC"monitorExit", CC"("OBJ")V", FN_PTR(Unsafe_MonitorExit)},
+ {CC"tryMonitorEnter", CC"("OBJ")Z", FN_PTR(Unsafe_TryMonitorEnter)},
+ {CC"throwException", CC"("THR")V", FN_PTR(Unsafe_ThrowException)},
+ {CC"compareAndSwapObject", CC"("OBJ"J"OBJ""OBJ")Z", FN_PTR(Unsafe_CompareAndSwapObject)},
+ {CC"compareAndSwapInt", CC"("OBJ"J""I""I"")Z", FN_PTR(Unsafe_CompareAndSwapInt)},
+ {CC"compareAndSwapLong", CC"("OBJ"J""J""J"")Z", FN_PTR(Unsafe_CompareAndSwapLong)},
+ {CC"putOrderedObject", CC"("OBJ"J"OBJ")V", FN_PTR(Unsafe_SetOrderedObject)},
+ {CC"putOrderedInt", CC"("OBJ"JI)V", FN_PTR(Unsafe_SetOrderedInt)},
+ {CC"putOrderedLong", CC"("OBJ"JJ)V", FN_PTR(Unsafe_SetOrderedLong)},
+ {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)},
+ {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)}
+
+// {CC"getLoadAverage", CC"([DI)I", FN_PTR(Unsafe_Loadavg)},
+
+// {CC"prefetchRead", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)},
+// {CC"prefetchWrite", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)}
+// {CC"prefetchReadStatic", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)},
+// {CC"prefetchWriteStatic",CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)}
+
+};
+
+JNINativeMethod loadavg_method[] = {
+ {CC"getLoadAverage", CC"([DI)I", FN_PTR(Unsafe_Loadavg)}
+};
+
+JNINativeMethod prefetch_methods[] = {
+ {CC"prefetchRead", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)},
+ {CC"prefetchWrite", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)},
+ {CC"prefetchReadStatic", CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchRead)},
+ {CC"prefetchWriteStatic",CC"("OBJ"J)V", FN_PTR(Unsafe_PrefetchWrite)}
+};
+
+JNINativeMethod memcopy_methods[] = {
+ {CC"copyMemory", CC"("OBJ"J"OBJ"JJ)V", FN_PTR(Unsafe_CopyMemory2)},
+ {CC"setMemory", CC"("OBJ"JJB)V", FN_PTR(Unsafe_SetMemory2)}
+};
+
+JNINativeMethod memcopy_methods_15[] = {
+ {CC"setMemory", CC"("ADR"JB)V", FN_PTR(Unsafe_SetMemory)},
+ {CC"copyMemory", CC"("ADR ADR"J)V", FN_PTR(Unsafe_CopyMemory)}
+};
+
+
+#undef CC
+#undef FN_PTR
+
+#undef ADR
+#undef LANG
+#undef OBJ
+#undef CLS
+#undef CTR
+#undef FLD
+#undef MTH
+#undef THR
+#undef DC0_Args
+#undef DC1_Args
+
+#undef DECLARE_GETSETOOP
+#undef DECLARE_GETSETNATIVE
+
+
+// This one function is exported, used by NativeLookup.
+// The Unsafe_xxx functions above are called only from the interpreter.
+// The optimizer looks at names and signatures to recognize
+// individual functions.
+
+JVM_ENTRY(void, JVM_RegisterUnsafeMethods(JNIEnv *env, jclass unsafecls))
+ UnsafeWrapper("JVM_RegisterUnsafeMethods");
+ {
+ ThreadToNativeFromVM ttnfv(thread);
+ {
+ env->RegisterNatives(unsafecls, loadavg_method, sizeof(loadavg_method)/sizeof(JNINativeMethod));
+ if (env->ExceptionOccurred()) {
+ if (PrintMiscellaneous && (Verbose || WizardMode)) {
+ tty->print_cr("Warning: SDK 1.6 Unsafe.loadavg not found.");
+ }
+ env->ExceptionClear();
+ }
+ }
+ {
+ env->RegisterNatives(unsafecls, prefetch_methods, sizeof(prefetch_methods)/sizeof(JNINativeMethod));
+ if (env->ExceptionOccurred()) {
+ if (PrintMiscellaneous && (Verbose || WizardMode)) {
+ tty->print_cr("Warning: SDK 1.6 Unsafe.prefetchRead/Write not found.");
+ }
+ env->ExceptionClear();
+ }
+ }
+ {
+ env->RegisterNatives(unsafecls, memcopy_methods, sizeof(memcopy_methods)/sizeof(JNINativeMethod));
+ if (env->ExceptionOccurred()) {
+ if (PrintMiscellaneous && (Verbose || WizardMode)) {
+ tty->print_cr("Warning: SDK 1.7 Unsafe.copyMemory not found.");
+ }
+ env->ExceptionClear();
+ env->RegisterNatives(unsafecls, memcopy_methods_15, sizeof(memcopy_methods_15)/sizeof(JNINativeMethod));
+ if (env->ExceptionOccurred()) {
+ if (PrintMiscellaneous && (Verbose || WizardMode)) {
+ tty->print_cr("Warning: SDK 1.5 Unsafe.copyMemory not found.");
+ }
+ env->ExceptionClear();
+ }
+ }
+ }
+ int status = env->RegisterNatives(unsafecls, methods, sizeof(methods)/sizeof(JNINativeMethod));
+ if (env->ExceptionOccurred()) {
+ if (PrintMiscellaneous && (Verbose || WizardMode)) {
+ tty->print_cr("Warning: SDK 1.6 version of Unsafe not found.");
+ }
+ env->ExceptionClear();
+ // %%% For now, be backward compatible with an older class:
+ status = env->RegisterNatives(unsafecls, methods_15, sizeof(methods_15)/sizeof(JNINativeMethod));
+ }
+ if (env->ExceptionOccurred()) {
+ if (PrintMiscellaneous && (Verbose || WizardMode)) {
+ tty->print_cr("Warning: SDK 1.5 version of Unsafe not found.");
+ }
+ env->ExceptionClear();
+ // %%% For now, be backward compatible with an older class:
+ status = env->RegisterNatives(unsafecls, methods_141, sizeof(methods_141)/sizeof(JNINativeMethod));
+ }
+ if (env->ExceptionOccurred()) {
+ if (PrintMiscellaneous && (Verbose || WizardMode)) {
+ tty->print_cr("Warning: SDK 1.4.1 version of Unsafe not found.");
+ }
+ env->ExceptionClear();
+ // %%% For now, be backward compatible with an older class:
+ status = env->RegisterNatives(unsafecls, methods_140, sizeof(methods_140)/sizeof(JNINativeMethod));
+ }
+ guarantee(status == 0, "register unsafe natives");
+ }
+JVM_END