1 /* 2 * Copyright (c) 1997, 2010, 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 "compiler/disassembler.hpp" 27 #include "oops/oop.inline.hpp" 28 #include "prims/forte.hpp" 29 #include "runtime/stubCodeGenerator.hpp" 30 #ifdef TARGET_ARCH_x86 31 # include "assembler_x86.inline.hpp" 32 #endif 33 #ifdef TARGET_ARCH_sparc 34 # include "assembler_sparc.inline.hpp" 35 #endif 36 #ifdef TARGET_ARCH_zero 37 # include "assembler_zero.inline.hpp" 38 #endif 39 40 41 // Implementation of StubCodeDesc 42 43 StubCodeDesc* StubCodeDesc::_list = NULL; 44 int StubCodeDesc::_count = 0; 45 46 47 StubCodeDesc* StubCodeDesc::desc_for(address pc) { 48 StubCodeDesc* p = _list; 49 while (p != NULL && !p->contains(pc)) p = p->_next; 50 // p == NULL || p->contains(pc) 51 return p; 52 } 53 54 55 StubCodeDesc* StubCodeDesc::desc_for_index(int index) { 56 StubCodeDesc* p = _list; 57 while (p != NULL && p->index() != index) p = p->_next; 58 return p; 59 } 60 61 62 const char* StubCodeDesc::name_for(address pc) { 63 StubCodeDesc* p = desc_for(pc); 64 return p == NULL ? NULL : p->name(); 65 } 66 67 68 void StubCodeDesc::print_on(outputStream* st) const { 69 st->print(group()); 70 st->print("::"); 71 st->print(name()); 72 st->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT "[ (%d bytes)", begin(), end(), size_in_bytes()); 73 } 74 75 // Implementation of StubCodeGenerator 76 77 StubCodeGenerator::StubCodeGenerator(CodeBuffer* code) { 78 _masm = new MacroAssembler(code); 79 _first_stub = _last_stub = NULL; 80 } 81 82 extern "C" { 83 static int compare_cdesc(const void* void_a, const void* void_b) { 84 int ai = (*((StubCodeDesc**) void_a))->index(); 85 int bi = (*((StubCodeDesc**) void_b))->index(); 86 return ai - bi; 87 } 88 } 89 90 StubCodeGenerator::~StubCodeGenerator() { 91 if (PrintStubCode) { 92 CodeBuffer* cbuf = _masm->code(); 93 CodeBlob* blob = CodeCache::find_blob_unsafe(cbuf->insts()->start()); 94 if (blob != NULL) { 95 blob->set_comments(cbuf->comments()); 96 } 97 bool saw_first = false; 98 StubCodeDesc* toprint[1000]; 99 int toprint_len = 0; 100 for (StubCodeDesc* cdesc = _last_stub; cdesc != NULL; cdesc = cdesc->_next) { 101 toprint[toprint_len++] = cdesc; 102 if (cdesc == _first_stub) { saw_first = true; break; } 103 } 104 assert(saw_first, "must get both first & last"); 105 // Print in reverse order: 106 qsort(toprint, toprint_len, sizeof(toprint[0]), compare_cdesc); 107 for (int i = 0; i < toprint_len; i++) { 108 StubCodeDesc* cdesc = toprint[i]; 109 cdesc->print(); 110 tty->cr(); 111 Disassembler::decode(cdesc->begin(), cdesc->end()); 112 tty->cr(); 113 } 114 } 115 } 116 117 118 void StubCodeGenerator::stub_prolog(StubCodeDesc* cdesc) { 119 // default implementation - do nothing 120 } 121 122 123 void StubCodeGenerator::stub_epilog(StubCodeDesc* cdesc) { 124 // default implementation - record the cdesc 125 if (_first_stub == NULL) _first_stub = cdesc; 126 _last_stub = cdesc; 127 } 128 129 130 // Implementation of CodeMark 131 132 StubCodeMark::StubCodeMark(StubCodeGenerator* cgen, const char* group, const char* name) { 133 _cgen = cgen; 134 _cdesc = new StubCodeDesc(group, name, _cgen->assembler()->pc()); 135 _cgen->stub_prolog(_cdesc); 136 // define the stub's beginning (= entry point) to be after the prolog: 137 _cdesc->set_begin(_cgen->assembler()->pc()); 138 } 139 140 StubCodeMark::~StubCodeMark() { 141 _cgen->assembler()->flush(); 142 _cdesc->set_end(_cgen->assembler()->pc()); 143 assert(StubCodeDesc::_list == _cdesc, "expected order on list"); 144 _cgen->stub_epilog(_cdesc); 145 Forte::register_stub(_cdesc->name(), _cdesc->begin(), _cdesc->end()); 146 147 if (JvmtiExport::should_post_dynamic_code_generated()) { 148 JvmtiExport::post_dynamic_code_generated(_cdesc->name(), _cdesc->begin(), _cdesc->end()); 149 } 150 }