diff options
Diffstat (limited to 'src/share/vm/prims/unsafe.cpp')
| -rw-r--r-- | src/share/vm/prims/unsafe.cpp | 55 |
1 files changed, 41 insertions, 14 deletions
diff --git a/src/share/vm/prims/unsafe.cpp b/src/share/vm/prims/unsafe.cpp index c91a827e5..e56277b65 100644 --- a/src/share/vm/prims/unsafe.cpp +++ b/src/share/vm/prims/unsafe.cpp @@ -124,6 +124,8 @@ inline void* index_oop_from_field_offset_long(oop p, jlong field_offset) { assert((void*)p->obj_field_addr<oop>((jint)byte_offset) == ptr_plus_disp, "raw [ptr+disp] must be consistent with oop::field_base"); } + jlong p_size = HeapWordSize * (jlong)(p->size()); + assert(byte_offset < p_size, err_msg("Unsafe access: offset " INT64_FORMAT " > object's size " INT64_FORMAT, byte_offset, p_size)); } #endif if (sizeof(char*) == sizeof(jint)) // (this constant folds!) @@ -466,6 +468,21 @@ UNSAFE_ENTRY(void, Unsafe_SetOrderedLong(JNIEnv *env, jobject unsafe, jobject ob #endif UNSAFE_END +UNSAFE_ENTRY(void, Unsafe_LoadFence(JNIEnv *env, jobject unsafe)) + UnsafeWrapper("Unsafe_LoadFence"); + OrderAccess::acquire(); +UNSAFE_END + +UNSAFE_ENTRY(void, Unsafe_StoreFence(JNIEnv *env, jobject unsafe)) + UnsafeWrapper("Unsafe_StoreFence"); + OrderAccess::release(); +UNSAFE_END + +UNSAFE_ENTRY(void, Unsafe_FullFence(JNIEnv *env, jobject unsafe)) + UnsafeWrapper("Unsafe_FullFence"); + OrderAccess::fence(); +UNSAFE_END + ////// Data in the C heap. // Note: These do not throw NullPointerException for bad pointers. @@ -769,7 +786,7 @@ UNSAFE_ENTRY(void, Unsafe_EnsureClassInitialized(JNIEnv *env, jobject unsafe, jo oop mirror = JNIHandles::resolve_non_null(clazz); Klass* klass = java_lang_Class::as_Klass(mirror); - if (klass != NULL && Klass::cast(klass)->should_be_initialized()) { + if (klass != NULL && klass->should_be_initialized()) { InstanceKlass* k = InstanceKlass::cast(klass); k->initialize(CHECK); } @@ -783,7 +800,7 @@ UNSAFE_ENTRY(jboolean, Unsafe_ShouldBeInitialized(JNIEnv *env, jobject unsafe, j } oop mirror = JNIHandles::resolve_non_null(clazz); Klass* klass = java_lang_Class::as_Klass(mirror); - if (klass != NULL && Klass::cast(klass)->should_be_initialized()) { + if (klass != NULL && klass->should_be_initialized()) { return true; } return false; @@ -802,7 +819,7 @@ static void getBaseAndScale(int& base, int& scale, jclass acls, TRAPS) { base = arrayOopDesc::base_offset_in_bytes(T_OBJECT); scale = heapOopSize; } else if (k->oop_is_typeArray()) { - typeArrayKlass* tak = typeArrayKlass::cast(k); + 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()); @@ -994,7 +1011,7 @@ UNSAFE_END // not just a literal string. For such ldc instructions, the verifier uses the // type Object instead of String, if the loaded constant is not in fact a String. -static oop +static instanceKlassHandle Unsafe_DefineAnonymousClass_impl(JNIEnv *env, jclass host_class, jbyteArray data, jobjectArray cp_patches_jh, HeapWord* *temp_alloc, @@ -1071,32 +1088,39 @@ Unsafe_DefineAnonymousClass_impl(JNIEnv *env, anon_klass = instanceKlassHandle(THREAD, anonk); } - // let caller initialize it as needed... - - return anon_klass->java_mirror(); + return anon_klass; } UNSAFE_ENTRY(jclass, Unsafe_DefineAnonymousClass(JNIEnv *env, jobject unsafe, jclass host_class, jbyteArray data, jobjectArray cp_patches_jh)) { + instanceKlassHandle anon_klass; + jobject res_jh = NULL; + UnsafeWrapper("Unsafe_DefineAnonymousClass"); ResourceMark rm(THREAD); HeapWord* temp_alloc = NULL; - jobject res_jh = NULL; - - { oop res_oop = Unsafe_DefineAnonymousClass_impl(env, - host_class, data, cp_patches_jh, + anon_klass = Unsafe_DefineAnonymousClass_impl(env, host_class, data, + cp_patches_jh, &temp_alloc, THREAD); - if (res_oop != NULL) - res_jh = JNIHandles::make_local(env, res_oop); - } + if (anon_klass() != NULL) + res_jh = JNIHandles::make_local(env, anon_klass->java_mirror()); // try/finally clause: if (temp_alloc != NULL) { FREE_C_HEAP_ARRAY(HeapWord, temp_alloc, mtInternal); } + // The anonymous class loader data has been artificially been kept alive to + // this point. The mirror and any instances of this class have to keep + // it alive afterwards. + if (anon_klass() != NULL) { + anon_klass->class_loader_data()->set_keep_alive(false); + } + + // let caller initialize it as needed... + return (jclass) res_jh; } UNSAFE_END @@ -1541,6 +1565,9 @@ static JNINativeMethod methods[] = { {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"loadFence", CC"()V", FN_PTR(Unsafe_LoadFence)}, + {CC"storeFence", CC"()V", FN_PTR(Unsafe_StoreFence)}, + {CC"fullFence", CC"()V", FN_PTR(Unsafe_FullFence)}, {CC"park", CC"(ZJ)V", FN_PTR(Unsafe_Park)}, {CC"unpark", CC"("OBJ")V", FN_PTR(Unsafe_Unpark)} |