1/*
2 * Copyright (c) 1997, 2019, 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/macroAssembler.hpp"
27#include "asm/macroAssembler.inline.hpp"
28#include "code/codeCache.hpp"
29#include "compiler/disassembler.hpp"
30#include "oops/oop.inline.hpp"
31#include "prims/forte.hpp"
32#include "runtime/stubCodeGenerator.hpp"
33
34
35// Implementation of StubCodeDesc
36
37StubCodeDesc* StubCodeDesc::_list = NULL;
38bool StubCodeDesc::_frozen = false;
39
40StubCodeDesc* StubCodeDesc::desc_for(address pc) {
41 StubCodeDesc* p = _list;
42 while (p != NULL && !p->contains(pc)) {
43 p = p->_next;
44 }
45 return p;
46}
47
48const char* StubCodeDesc::name_for(address pc) {
49 StubCodeDesc* p = desc_for(pc);
50 return p == NULL ? NULL : p->name();
51}
52
53
54void StubCodeDesc::freeze() {
55 assert(!_frozen, "repeated freeze operation");
56 _frozen = true;
57}
58
59void StubCodeDesc::print_on(outputStream* st) const {
60 st->print("%s", group());
61 st->print("::");
62 st->print("%s", name());
63 st->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT "] (%d bytes)", p2i(begin()), p2i(end()), size_in_bytes());
64}
65
66void StubCodeDesc::print() const { print_on(tty); }
67
68// Implementation of StubCodeGenerator
69
70StubCodeGenerator::StubCodeGenerator(CodeBuffer* code, bool print_code) {
71 _masm = new MacroAssembler(code );
72 _print_code = PrintStubCode || print_code;
73}
74
75StubCodeGenerator::~StubCodeGenerator() {
76 if (PRODUCT_ONLY(_print_code) NOT_PRODUCT(true)) {
77 CodeBuffer* cbuf = _masm->code();
78 CodeBlob* blob = CodeCache::find_blob_unsafe(cbuf->insts()->start());
79 if (blob != NULL) {
80 blob->set_strings(cbuf->strings());
81 }
82 }
83}
84
85void StubCodeGenerator::stub_prolog(StubCodeDesc* cdesc) {
86 // default implementation - do nothing
87}
88
89void StubCodeGenerator::stub_epilog(StubCodeDesc* cdesc) {
90 if (_print_code) {
91 CodeStrings cs;
92 ptrdiff_t offset = 0;
93#ifndef PRODUCT
94 // Find the code strings in the outer CodeBuffer.
95 CodeBuffer *outer_cbuf = _masm->code_section()->outer();
96 cs = outer_cbuf->strings();
97 // The offset from the start of the outer CodeBuffer to the start
98 // of this stub.
99 offset = cdesc->begin() - outer_cbuf->insts()->start();
100#endif
101 ttyLocker ttyl;
102 tty->print_cr("- - - [BEGIN] - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -");
103 cdesc->print_on(tty);
104 tty->cr();
105 Disassembler::decode(cdesc->begin(), cdesc->end(), tty, cs /*, offset */);
106 tty->print_cr("- - - [END] - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -");
107 tty->cr();
108 }
109}
110
111
112// Implementation of CodeMark
113
114StubCodeMark::StubCodeMark(StubCodeGenerator* cgen, const char* group, const char* name) {
115 _cgen = cgen;
116 _cdesc = new StubCodeDesc(group, name, _cgen->assembler()->pc());
117 _cgen->stub_prolog(_cdesc);
118 // define the stub's beginning (= entry point) to be after the prolog:
119 _cdesc->set_begin(_cgen->assembler()->pc());
120}
121
122StubCodeMark::~StubCodeMark() {
123 _cgen->assembler()->flush();
124 _cdesc->set_end(_cgen->assembler()->pc());
125 assert(StubCodeDesc::_list == _cdesc, "expected order on list");
126 _cgen->stub_epilog(_cdesc);
127 Forte::register_stub(_cdesc->name(), _cdesc->begin(), _cdesc->end());
128
129 if (JvmtiExport::should_post_dynamic_code_generated()) {
130 JvmtiExport::post_dynamic_code_generated(_cdesc->name(), _cdesc->begin(), _cdesc->end());
131 }
132}
133