1 /* 2 * Copyright (c) 1997, 2015, 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 "code/codeCacheExtensions.hpp" 30 #include "compiler/disassembler.hpp" 31 #include "oops/oop.inline.hpp" 32 #include "prims/forte.hpp" 33 #include "runtime/stubCodeGenerator.hpp" 34 35 36 // Implementation of StubCodeDesc 37 38 StubCodeDesc* StubCodeDesc::_list = NULL; 39 bool StubCodeDesc::_frozen = false; 40 41 StubCodeDesc* StubCodeDesc::desc_for(address pc) { 42 StubCodeDesc* p = _list; 43 while (p != NULL && !p->contains(pc)) { 44 p = p->_next; 45 } 46 return p; 47 } 48 49 const char* StubCodeDesc::name_for(address pc) { 50 StubCodeDesc* p = desc_for(pc); 51 return p == NULL ? NULL : p->name(); 52 } 53 54 55 void StubCodeDesc::freeze() { 56 assert(!_frozen, "repeated freeze operation"); 57 _frozen = true; 58 } 59 60 void StubCodeDesc::print_on(outputStream* st) const { 61 st->print("%s", group()); 62 st->print("::"); 63 st->print("%s", name()); 64 st->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT "[ (%d bytes)", p2i(begin()), p2i(end()), size_in_bytes()); 65 } 66 67 // Implementation of StubCodeGenerator 68 69 StubCodeGenerator::StubCodeGenerator(CodeBuffer* code, bool print_code) { 70 _masm = new MacroAssembler(code ); 71 _print_code = PrintStubCode || print_code; 72 } 73 74 StubCodeGenerator::~StubCodeGenerator() { 75 if (_print_code) { 76 CodeBuffer* cbuf = _masm->code(); 77 CodeBlob* blob = CodeCache::find_blob_unsafe(cbuf->insts()->start()); 78 if (blob != NULL) { 79 blob->set_strings(cbuf->strings()); 80 } 81 } 82 } 83 84 void StubCodeGenerator::stub_prolog(StubCodeDesc* cdesc) { 85 // default implementation - do nothing 86 } 87 88 void StubCodeGenerator::stub_epilog(StubCodeDesc* cdesc) { 89 if (_print_code) { 90 cdesc->print(); 91 tty->cr(); 92 Disassembler::decode(cdesc->begin(), cdesc->end()); 93 tty->cr(); 94 } 95 } 96 97 98 // Implementation of CodeMark 99 100 StubCodeMark::StubCodeMark(StubCodeGenerator* cgen, const char* group, const char* name) { 101 _cgen = cgen; 102 _cdesc = new StubCodeDesc(group, name, _cgen->assembler()->pc()); 103 _cgen->stub_prolog(_cdesc); 104 // define the stub's beginning (= entry point) to be after the prolog: 105 _cdesc->set_begin(_cgen->assembler()->pc()); 106 } 107 108 StubCodeMark::~StubCodeMark() { 109 _cgen->assembler()->flush(); 110 _cdesc->set_end(_cgen->assembler()->pc()); 111 assert(StubCodeDesc::_list == _cdesc, "expected order on list"); 112 _cgen->stub_epilog(_cdesc); 113 Forte::register_stub(_cdesc->name(), _cdesc->begin(), _cdesc->end()); 114 115 if (JvmtiExport::should_post_dynamic_code_generated()) { 116 JvmtiExport::post_dynamic_code_generated(_cdesc->name(), _cdesc->begin(), _cdesc->end()); 117 } 118 }