Mercurial > hg > graal-compiler
view src/share/vm/prims/unsafe.cpp @ 124:b130b98db9cf
6689060: Escape Analysis does not work with Compressed Oops
Summary: 64-bits VM crashes with -XX:+AggresiveOpts (Escape Analysis + Compressed Oops)
Reviewed-by: never, sgoldman
author | kvn |
---|---|
date | Wed, 23 Apr 2008 11:20:36 -0700 |
parents | ba764ed4b6f2 |
children | d1605aabd0a1 37f87013dfd8 |
line wrap: on
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/* * 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<oop>((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(); // Macros for oops that check UseCompressedOops #define GET_OOP_FIELD(obj, offset, v) \ oop p = JNIHandles::resolve(obj); \ oop v; \ if (UseCompressedOops) { \ narrowOop n = *(narrowOop*)index_oop_from_field_offset_long(p, offset); \ v = oopDesc::decode_heap_oop(n); \ } else { \ v = *(oop*)index_oop_from_field_offset_long(p, offset); \ } #define GET_OOP_FIELD_VOLATILE(obj, offset, v) \ oop p = JNIHandles::resolve(obj); \ volatile oop v; \ if (UseCompressedOops) { \ volatile narrowOop n = *(volatile narrowOop*)index_oop_from_field_offset_long(p, offset); \ v = oopDesc::decode_heap_oop(n); \ } else { \ v = *(volatile oop*)index_oop_from_field_offset_long(p, offset); \ } // 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_OOP_FIELD(obj, offset, 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 (UseCompressedOops) { if (x != NULL) { // If there is a heap base pointer, we are obliged to emit a store barrier. oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); } else { narrowOop n = oopDesc::encode_heap_oop_not_null(x); *(narrowOop*)index_oop_from_field_offset_long(p, offset) = n; } } else { 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_OOP_FIELD(obj, offset, 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); if (UseCompressedOops) { oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); } else { 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_OOP_FIELD_VOLATILE(obj, offset, 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); if (UseCompressedOops) { oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); } else { 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); if (UseCompressedOops) { oop_store((narrowOop*)index_oop_from_field_offset_long(p, offset), x); } else { 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 = heapOopSize; } 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); HeapWord* addr = (HeapWord *)index_oop_from_field_offset_long(p, offset); oop res = oopDesc::atomic_compare_exchange_oop(x, addr, e); jboolean success = (res == e); if (success) update_barrier_set((void*)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