1 /* 2 * Copyright (c) 1997, 2011, 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 #ifdef TARGET_ARCH_arm 40 # include "assembler_arm.inline.hpp" 41 #endif 42 #ifdef TARGET_ARCH_ppc 43 # include "assembler_ppc.inline.hpp" 44 #endif 45 46 47 // Implementation of StubCodeDesc 48 49 StubCodeDesc* StubCodeDesc::_list = NULL; 50 int StubCodeDesc::_count = 0; 51 52 53 StubCodeDesc* StubCodeDesc::desc_for(address pc) { 54 StubCodeDesc* p = _list; 55 while (p != NULL && !p->contains(pc)) p = p->_next; 56 // p == NULL || p->contains(pc) 57 return p; 58 } 59 60 61 StubCodeDesc* StubCodeDesc::desc_for_index(int index) { 62 StubCodeDesc* p = _list; 63 while (p != NULL && p->index() != index) p = p->_next; 64 return p; 65 } 66 67 68 const char* StubCodeDesc::name_for(address pc) { 69 StubCodeDesc* p = desc_for(pc); 70 return p == NULL ? NULL : p->name(); 71 } 72 73 74 void StubCodeDesc::print_on(outputStream* st) const { 75 st->print(group()); 76 st->print("::"); 77 st->print(name()); 78 st->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT "[ (%d bytes)", begin(), end(), size_in_bytes()); 79 } 80 81 // Implementation of StubCodeGenerator 82 83 StubCodeGenerator::StubCodeGenerator(CodeBuffer* code, bool print_code) { 84 _masm = new MacroAssembler(code); 85 _first_stub = _last_stub = NULL; 86 _print_code = print_code; 87 } 88 89 extern "C" { 90 static int compare_cdesc(const void* void_a, const void* void_b) { 91 int ai = (*((StubCodeDesc**) void_a))->index(); 92 int bi = (*((StubCodeDesc**) void_b))->index(); 93 return ai - bi; 94 } 95 } 96 97 StubCodeGenerator::~StubCodeGenerator() { 98 if (PrintStubCode || _print_code) { 99 CodeBuffer* cbuf = _masm->code(); 100 CodeBlob* blob = CodeCache::find_blob_unsafe(cbuf->insts()->start()); 101 if (blob != NULL) { 102 blob->set_comments(cbuf->comments()); 103 } 104 bool saw_first = false; 105 StubCodeDesc* toprint[1000]; 106 int toprint_len = 0; 107 for (StubCodeDesc* cdesc = _last_stub; cdesc != NULL; cdesc = cdesc->_next) { 108 toprint[toprint_len++] = cdesc; 109 if (cdesc == _first_stub) { saw_first = true; break; } 110 } 111 assert(saw_first, "must get both first & last"); 112 // Print in reverse order: 113 qsort(toprint, toprint_len, sizeof(toprint[0]), compare_cdesc); 114 for (int i = 0; i < toprint_len; i++) { 115 StubCodeDesc* cdesc = toprint[i]; 116 cdesc->print(); 117 tty->cr(); 118 Disassembler::decode(cdesc->begin(), cdesc->end()); 119 tty->cr(); 120 } 121 } 122 } 123 124 125 void StubCodeGenerator::stub_prolog(StubCodeDesc* cdesc) { 126 // default implementation - do nothing 127 } 128 129 130 void StubCodeGenerator::stub_epilog(StubCodeDesc* cdesc) { 131 // default implementation - record the cdesc 132 if (_first_stub == NULL) _first_stub = cdesc; 133 _last_stub = cdesc; 134 } 135 136 137 // Implementation of CodeMark 138 139 StubCodeMark::StubCodeMark(StubCodeGenerator* cgen, const char* group, const char* name) { 140 _cgen = cgen; 141 _cdesc = new StubCodeDesc(group, name, _cgen->assembler()->pc()); 142 _cgen->stub_prolog(_cdesc); 143 // define the stub's beginning (= entry point) to be after the prolog: 144 _cdesc->set_begin(_cgen->assembler()->pc()); 145 } 146 147 StubCodeMark::~StubCodeMark() { 148 _cgen->assembler()->flush(); 149 _cdesc->set_end(_cgen->assembler()->pc()); 150 assert(StubCodeDesc::_list == _cdesc, "expected order on list"); 151 _cgen->stub_epilog(_cdesc); 152 Forte::register_stub(_cdesc->name(), _cdesc->begin(), _cdesc->end()); 153 154 if (JvmtiExport::should_post_dynamic_code_generated()) { 155 JvmtiExport::post_dynamic_code_generated(_cdesc->name(), _cdesc->begin(), _cdesc->end()); 156 } 157 }