1 /* 2 * Copyright (c) 1997, 2014, 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 int StubCodeDesc::_count = 0; 39 40 41 StubCodeDesc* StubCodeDesc::desc_for(address pc) { 42 StubCodeDesc* p = _list; 43 while (p != NULL && !p->contains(pc)) p = p->_next; 44 // p == NULL || p->contains(pc) 45 return p; 46 } 47 48 49 StubCodeDesc* StubCodeDesc::desc_for_index(int index) { 50 StubCodeDesc* p = _list; 51 while (p != NULL && p->index() != index) p = p->_next; 52 return p; 53 } 54 55 56 const char* StubCodeDesc::name_for(address pc) { 57 StubCodeDesc* p = desc_for(pc); 58 return p == NULL ? NULL : p->name(); 59 } 60 61 62 void StubCodeDesc::print_on(outputStream* st) const { 63 st->print("%s", group()); 64 st->print("::"); 65 st->print("%s", name()); 66 st->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT "[ (%d bytes)", p2i(begin()), p2i(end()), size_in_bytes()); 67 } 68 69 // Implementation of StubCodeGenerator 70 71 StubCodeGenerator::StubCodeGenerator(CodeBuffer* code, bool print_code) { 72 _masm = new MacroAssembler(code); 73 _first_stub = _last_stub = NULL; 74 _print_code = print_code; 75 } 76 77 extern "C" { 78 static int compare_cdesc(const void* void_a, const void* void_b) { 79 int ai = (*((StubCodeDesc**) void_a))->index(); 80 int bi = (*((StubCodeDesc**) void_b))->index(); 81 return ai - bi; 82 } 83 } 84 85 StubCodeGenerator::~StubCodeGenerator() { 86 if (PrintStubCode || _print_code) { 87 CodeBuffer* cbuf = _masm->code(); 88 CodeBlob* blob = CodeCache::find_blob_unsafe(cbuf->insts()->start()); 89 if (blob != NULL) { 90 blob->set_strings(cbuf->strings()); 91 } 92 bool saw_first = false; 93 StubCodeDesc* toprint[1000]; 94 int toprint_len = 0; 95 for (StubCodeDesc* cdesc = _last_stub; cdesc != NULL; cdesc = cdesc->_next) { 96 toprint[toprint_len++] = cdesc; 97 if (cdesc == _first_stub) { saw_first = true; break; } 98 } 99 assert(toprint_len == 0 || saw_first, "must get both first & last"); 100 // Print in reverse order: 101 qsort(toprint, toprint_len, sizeof(toprint[0]), compare_cdesc); 102 for (int i = 0; i < toprint_len; i++) { 103 StubCodeDesc* cdesc = toprint[i]; 104 cdesc->print(); 105 tty->cr(); 106 Disassembler::decode(cdesc->begin(), cdesc->end()); 107 tty->cr(); 108 } 109 } 110 } 111 112 113 void StubCodeGenerator::stub_prolog(StubCodeDesc* cdesc) { 114 // default implementation - do nothing 115 } 116 117 118 void StubCodeGenerator::stub_epilog(StubCodeDesc* cdesc) { 119 // default implementation - record the cdesc 120 if (_first_stub == NULL) _first_stub = cdesc; 121 _last_stub = cdesc; 122 } 123 124 125 // Implementation of CodeMark 126 127 StubCodeMark::StubCodeMark(StubCodeGenerator* cgen, const char* group, const char* name) { 128 _cgen = cgen; 129 _cdesc = new StubCodeDesc(group, name, _cgen->assembler()->pc()); 130 _cgen->stub_prolog(_cdesc); 131 // define the stub's beginning (= entry point) to be after the prolog: 132 _cdesc->set_begin(_cgen->assembler()->pc()); 133 } 134 135 StubCodeMark::~StubCodeMark() { 136 _cgen->assembler()->flush(); 137 _cdesc->set_end(_cgen->assembler()->pc()); 138 assert(StubCodeDesc::_list == _cdesc, "expected order on list"); 139 _cgen->stub_epilog(_cdesc); 140 Forte::register_stub(_cdesc->name(), _cdesc->begin(), _cdesc->end()); 141 142 if (JvmtiExport::should_post_dynamic_code_generated()) { 143 JvmtiExport::post_dynamic_code_generated(_cdesc->name(), _cdesc->begin(), _cdesc->end()); 144 } 145 }