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src/hotspot/share/oops/typeArrayKlass.cpp

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rev 49674 : 8198285: More consistent Access API for arraycopy


 135   if (!d->is_typeArray() || element_type() != TypeArrayKlass::cast(d->klass())->element_type()) {
 136     THROW(vmSymbols::java_lang_ArrayStoreException());
 137   }
 138 
 139   // Check is all offsets and lengths are non negative
 140   if (src_pos < 0 || dst_pos < 0 || length < 0) {
 141     THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
 142   }
 143   // Check if the ranges are valid
 144   if  ( (((unsigned int) length + (unsigned int) src_pos) > (unsigned int) s->length())
 145      || (((unsigned int) length + (unsigned int) dst_pos) > (unsigned int) d->length()) ) {
 146     THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
 147   }
 148   // Check zero copy
 149   if (length == 0)
 150     return;
 151 
 152   // This is an attempt to make the copy_array fast.
 153   int l2es = log2_element_size();
 154   int ihs = array_header_in_bytes() / wordSize;
 155   void* src = (char*) (s->base(element_type())) + ((size_t)src_pos << l2es);
 156   void* dst = (char*) (d->base(element_type())) + ((size_t)dst_pos << l2es);
 157   HeapAccess<ARRAYCOPY_ATOMIC>::arraycopy(s, d, src, dst, (size_t)length << l2es);
 158 }
 159 
 160 
 161 // create a klass of array holding typeArrays
 162 Klass* TypeArrayKlass::array_klass_impl(bool or_null, int n, TRAPS) {
 163   int dim = dimension();
 164   assert(dim <= n, "check order of chain");
 165     if (dim == n)
 166       return this;
 167 
 168   // lock-free read needs acquire semantics
 169   if (higher_dimension_acquire() == NULL) {
 170     if (or_null)  return NULL;
 171 
 172     ResourceMark rm;
 173     JavaThread *jt = (JavaThread *)THREAD;
 174     {
 175       MutexLocker mc(Compile_lock, THREAD);   // for vtables
 176       // Atomic create higher dimension and link into list
 177       MutexLocker mu(MultiArray_lock, THREAD);




 135   if (!d->is_typeArray() || element_type() != TypeArrayKlass::cast(d->klass())->element_type()) {
 136     THROW(vmSymbols::java_lang_ArrayStoreException());
 137   }
 138 
 139   // Check is all offsets and lengths are non negative
 140   if (src_pos < 0 || dst_pos < 0 || length < 0) {
 141     THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
 142   }
 143   // Check if the ranges are valid
 144   if  ( (((unsigned int) length + (unsigned int) src_pos) > (unsigned int) s->length())
 145      || (((unsigned int) length + (unsigned int) dst_pos) > (unsigned int) d->length()) ) {
 146     THROW(vmSymbols::java_lang_ArrayIndexOutOfBoundsException());
 147   }
 148   // Check zero copy
 149   if (length == 0)
 150     return;
 151 
 152   // This is an attempt to make the copy_array fast.
 153   int l2es = log2_element_size();
 154   int ihs = array_header_in_bytes() / wordSize;
 155   size_t src_offset = arrayOopDesc::base_offset_in_bytes(element_type()) + ((size_t)src_pos << l2es);
 156   size_t dst_offset = arrayOopDesc::base_offset_in_bytes(element_type()) + ((size_t)dst_pos << l2es);
 157   HeapAccess<ARRAYCOPY_ATOMIC>::arraycopy<void>(s, src_offset, NULL, d, dst_offset, NULL, (size_t)length << l2es);
 158 }
 159 
 160 
 161 // create a klass of array holding typeArrays
 162 Klass* TypeArrayKlass::array_klass_impl(bool or_null, int n, TRAPS) {
 163   int dim = dimension();
 164   assert(dim <= n, "check order of chain");
 165     if (dim == n)
 166       return this;
 167 
 168   // lock-free read needs acquire semantics
 169   if (higher_dimension_acquire() == NULL) {
 170     if (or_null)  return NULL;
 171 
 172     ResourceMark rm;
 173     JavaThread *jt = (JavaThread *)THREAD;
 174     {
 175       MutexLocker mc(Compile_lock, THREAD);   // for vtables
 176       // Atomic create higher dimension and link into list
 177       MutexLocker mu(MultiArray_lock, THREAD);


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