1 /*
 2  * Copyright (c) 2022, Oracle and/or its affiliates. All rights reserved.
 3  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 4  *
 5  * This code is free software; you can redistribute it and/or modify it
 6  * under the terms of the GNU General Public License version 2 only, as
 7  * published by the Free Software Foundation.
 8  *
 9  * This code is distributed in the hope that it will be useful, but WITHOUT
10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
12  * version 2 for more details (a copy is included in the LICENSE file that
13  * accompanied this code).
14  *
15  * You should have received a copy of the GNU General Public License version
16  * 2 along with this work; if not, write to the Free Software Foundation,
17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18  *
19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20  * or visit www.oracle.com if you need additional information or have any
21  * questions.
22  *
23  */
24 
25 #include "precompiled.hpp"
26 #include "asm/codeBuffer.hpp"
27 #include "code/codeBlob.hpp"
28 #include "opto/c2_CodeStubs.hpp"
29 #include "opto/c2_MacroAssembler.hpp"
30 #include "opto/compile.hpp"
31 #include "opto/output.hpp"
32 
33 C2CodeStubList::C2CodeStubList() :
34     _stubs(Compile::current()->comp_arena(), 2, 0, NULL) {}
35 
36 void C2CodeStubList::emit(CodeBuffer& cb) {
37   C2_MacroAssembler masm(&cb);
38   for (int i = _stubs.length() - 1; i >= 0; i--) {
39     C2CodeStub* stub = _stubs.at(i);
40     int max_size = stub->max_size();
41     // Make sure there is enough space in the code buffer
42     if (cb.insts()->maybe_expand_to_ensure_remaining(max_size) && cb.blob() == NULL) {
43       ciEnv::current()->record_failure("CodeCache is full");
44       return;
45     }
46 
47     DEBUG_ONLY(int size_before = cb.insts_size();)
48 
49     stub->emit(masm);
50 
51     DEBUG_ONLY(int actual_size = cb.insts_size() - size_before;)
52     assert(max_size >= actual_size, "Expected stub size (%d) must be larger than or equal to actual stub size (%d)", max_size, actual_size);
53   }
54   _stubs.clear();
55 }