/* * Copyright (c) 2016, 2020, Oracle and/or its affiliates. All rights reserved. * Copyright (c) 2016 SAP SE. 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. *
*/
public: void try_allocate( Register obj, // result: Pointer to object after successful allocation. Register var_size_in_bytes, // Object size in bytes if unknown at compile time; invalid otherwise. int con_size_in_bytes, // Object size in bytes if known at compile time. Register t1, // temp register
Label& slow_case // Continuation point if fast allocation fails.
);
// locking // hdr : Used to hold locked markWord to be CASed into obj, contents destroyed. // obj : Must point to the object to lock, contents preserved. // disp_hdr: Must point to the displaced header location, contents preserved. // Returns code offset at which to add null check debug information. void lock_object(Register hdr, Register obj, Register disp_hdr, Label& slow_case);
// unlocking // hdr : Used to hold original markWord to be CASed back into obj, contents destroyed. // obj : Must point to the object to lock, contents preserved. // disp_hdr: Must point to the displaced header location, contents destroyed. void unlock_object(Register hdr, Register obj, Register lock, Label& slow_case);
void initialize_object( Register obj, // result: Pointer to object after successful allocation. Register klass, // object klass Register var_size_in_bytes, // Object size in bytes if unknown at compile time; invalid otherwise. int con_size_in_bytes, // Object size in bytes if known at compile time. Register t1, // temp register Register t2 // temp register
);
// Allocation of fixed-size objects. // This can also be used to allocate fixed-size arrays, by setting // hdr_size correctly and storing the array length afterwards. void allocate_object( Register obj, // result: Pointer to object after successful allocation. Register t1, // temp register Register t2, // temp register int hdr_size, // object header size in words int obj_size, // object size in words Register klass, // object klass
Label& slow_case // Continuation point if fast allocation fails.
);
// Allocation of arrays. void allocate_array( Register obj, // result: Pointer to array after successful allocation. Register len, // array length Register t1, // temp register Register t2, // temp register int hdr_size, // object header size in words int elt_size, // element size in bytes Register klass, // object klass
Label& slow_case // Continuation point if fast allocation fails.
);
// Invalidates registers in this window. void invalidate_registers(Register preserve1 = noreg, Register preserve2 = noreg, Register preserve3 = noreg) PRODUCT_RETURN;
// This platform only uses signal-based null checks. The Label is not needed. void null_check(Register r, Label *Lnull = NULL) { MacroAssembler::null_check(r); }
#endif// CPU_S390_C1_MACROASSEMBLER_S390_HPP
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