1 /* 2 * Copyright (c) 1997, 2018, 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 37 StubCodeDesc* StubCodeDesc::_list = NULL; 38 bool StubCodeDesc::_frozen = false; 39 40 StubCodeDesc* 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 48 const char* StubCodeDesc::name_for(address pc) { 49 StubCodeDesc* p = desc_for(pc); 50 return p == NULL ? NULL : p->name(); 51 } 52 53 54 void StubCodeDesc::freeze() { 55 assert(!_frozen, "repeated freeze operation"); 56 _frozen = true; 57 } 58 59 void 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 66 // Implementation of StubCodeGenerator 67 68 StubCodeGenerator::StubCodeGenerator(CodeBuffer* code, bool print_code) { 69 _masm = new MacroAssembler(code ); 70 _print_code = PrintStubCode || print_code; 71 } 72 73 StubCodeGenerator::~StubCodeGenerator() { 74 if (PRODUCT_ONLY(_print_code) NOT_PRODUCT(true)) { 75 CodeBuffer* cbuf = _masm->code(); 76 CodeBlob* blob = CodeCache::find_blob_unsafe(cbuf->insts()->start()); 77 if (blob != NULL) { 78 blob->set_strings(cbuf->strings()); 79 } 80 } 81 } 82 83 void StubCodeGenerator::stub_prolog(StubCodeDesc* cdesc) { 84 // default implementation - do nothing 85 } 86 87 void StubCodeGenerator::stub_epilog(StubCodeDesc* cdesc) { 88 if (_print_code) { 89 CodeStrings cs; 90 ptrdiff_t offset = 0; 91 #ifndef PRODUCT 92 // Find the code strings in the outer CodeBuffer. 93 CodeBuffer *outer_cbuf = _masm->code_section()->outer(); 94 cs = outer_cbuf->strings(); 95 // The offset from the start of the outer CodeBuffer to the start 96 // of this stub. 97 offset = cdesc->begin() - outer_cbuf->insts()->start(); 98 #endif 99 ttyLocker ttyl; 100 tty->print_cr("- - - [BEGIN] - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -"); 101 cdesc->print_on(tty); 102 tty->cr(); 103 Disassembler::decode(cdesc->begin(), cdesc->end(), tty, cs /*, offset */); 104 tty->print_cr("- - - [END] - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -"); 105 tty->cr(); 106 } 107 } 108 109 110 // Implementation of CodeMark 111 112 StubCodeMark::StubCodeMark(StubCodeGenerator* cgen, const char* group, const char* name) { 113 _cgen = cgen; 114 _cdesc = new StubCodeDesc(group, name, _cgen->assembler()->pc()); 115 _cgen->stub_prolog(_cdesc); 116 // define the stub's beginning (= entry point) to be after the prolog: 117 _cdesc->set_begin(_cgen->assembler()->pc()); 118 } 119 120 StubCodeMark::~StubCodeMark() { 121 _cgen->assembler()->flush(); 122 _cdesc->set_end(_cgen->assembler()->pc()); 123 assert(StubCodeDesc::_list == _cdesc, "expected order on list"); 124 _cgen->stub_epilog(_cdesc); 125 Forte::register_stub(_cdesc->name(), _cdesc->begin(), _cdesc->end()); 126 127 if (JvmtiExport::should_post_dynamic_code_generated()) { 128 JvmtiExport::post_dynamic_code_generated(_cdesc->name(), _cdesc->begin(), _cdesc->end()); 129 } 130 }