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1 /* |
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2 * Copyright (c) 1997, 2014, Oracle and/or its affiliates. All rights reserved. |
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3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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4 * |
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5 * This code is free software; you can redistribute it and/or modify it |
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6 * under the terms of the GNU General Public License version 2 only, as |
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7 * published by the Free Software Foundation. |
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8 * |
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9 * This code is distributed in the hope that it will be useful, but WITHOUT |
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10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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12 * version 2 for more details (a copy is included in the LICENSE file that |
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13 * accompanied this code). |
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14 * |
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15 * You should have received a copy of the GNU General Public License version |
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16 * 2 along with this work; if not, write to the Free Software Foundation, |
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17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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18 * |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
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22 * |
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23 */ |
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24 |
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25 #include "precompiled.hpp" |
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26 #include "asm/macroAssembler.hpp" |
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27 #include "asm/macroAssembler.inline.hpp" |
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28 #include "code/codeCache.hpp" |
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29 #include "compiler/disassembler.hpp" |
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30 #include "oops/oop.inline.hpp" |
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31 #include "prims/forte.hpp" |
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32 #include "runtime/stubCodeGenerator.hpp" |
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33 |
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34 |
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35 // Implementation of StubCodeDesc |
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36 |
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37 StubCodeDesc* StubCodeDesc::_list = NULL; |
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38 int StubCodeDesc::_count = 0; |
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39 |
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40 |
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41 StubCodeDesc* StubCodeDesc::desc_for(address pc) { |
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42 StubCodeDesc* p = _list; |
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43 while (p != NULL && !p->contains(pc)) p = p->_next; |
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44 // p == NULL || p->contains(pc) |
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45 return p; |
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46 } |
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47 |
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48 |
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49 StubCodeDesc* StubCodeDesc::desc_for_index(int index) { |
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50 StubCodeDesc* p = _list; |
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51 while (p != NULL && p->index() != index) p = p->_next; |
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52 return p; |
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53 } |
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54 |
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55 |
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56 const char* StubCodeDesc::name_for(address pc) { |
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57 StubCodeDesc* p = desc_for(pc); |
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58 return p == NULL ? NULL : p->name(); |
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59 } |
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60 |
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61 |
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62 void StubCodeDesc::print_on(outputStream* st) const { |
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63 st->print("%s", group()); |
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64 st->print("::"); |
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65 st->print("%s", name()); |
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66 st->print(" [" INTPTR_FORMAT ", " INTPTR_FORMAT "[ (%d bytes)", p2i(begin()), p2i(end()), size_in_bytes()); |
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67 } |
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68 |
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69 // Implementation of StubCodeGenerator |
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70 |
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71 StubCodeGenerator::StubCodeGenerator(CodeBuffer* code, bool print_code) { |
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72 _masm = new MacroAssembler(code); |
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73 _first_stub = _last_stub = NULL; |
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74 _print_code = print_code; |
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75 } |
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76 |
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77 extern "C" { |
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78 static int compare_cdesc(const void* void_a, const void* void_b) { |
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79 int ai = (*((StubCodeDesc**) void_a))->index(); |
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80 int bi = (*((StubCodeDesc**) void_b))->index(); |
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81 return ai - bi; |
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82 } |
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83 } |
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84 |
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85 StubCodeGenerator::~StubCodeGenerator() { |
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86 if (PrintStubCode || _print_code) { |
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87 CodeBuffer* cbuf = _masm->code(); |
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88 CodeBlob* blob = CodeCache::find_blob_unsafe(cbuf->insts()->start()); |
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89 if (blob != NULL) { |
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90 blob->set_strings(cbuf->strings()); |
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91 } |
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92 bool saw_first = false; |
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93 StubCodeDesc* toprint[1000]; |
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94 int toprint_len = 0; |
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95 for (StubCodeDesc* cdesc = _last_stub; cdesc != NULL; cdesc = cdesc->_next) { |
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96 toprint[toprint_len++] = cdesc; |
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97 if (cdesc == _first_stub) { saw_first = true; break; } |
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98 } |
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99 assert(saw_first, "must get both first & last"); |
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100 // Print in reverse order: |
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101 qsort(toprint, toprint_len, sizeof(toprint[0]), compare_cdesc); |
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102 for (int i = 0; i < toprint_len; i++) { |
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103 StubCodeDesc* cdesc = toprint[i]; |
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104 cdesc->print(); |
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105 tty->cr(); |
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106 Disassembler::decode(cdesc->begin(), cdesc->end()); |
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107 tty->cr(); |
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108 } |
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109 } |
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110 } |
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111 |
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112 |
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113 void StubCodeGenerator::stub_prolog(StubCodeDesc* cdesc) { |
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114 // default implementation - do nothing |
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115 } |
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116 |
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117 |
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118 void StubCodeGenerator::stub_epilog(StubCodeDesc* cdesc) { |
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119 // default implementation - record the cdesc |
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120 if (_first_stub == NULL) _first_stub = cdesc; |
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121 _last_stub = cdesc; |
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122 } |
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123 |
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124 |
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125 // Implementation of CodeMark |
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126 |
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127 StubCodeMark::StubCodeMark(StubCodeGenerator* cgen, const char* group, const char* name) { |
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128 _cgen = cgen; |
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129 _cdesc = new StubCodeDesc(group, name, _cgen->assembler()->pc()); |
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130 _cgen->stub_prolog(_cdesc); |
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131 // define the stub's beginning (= entry point) to be after the prolog: |
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132 _cdesc->set_begin(_cgen->assembler()->pc()); |
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133 } |
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134 |
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135 StubCodeMark::~StubCodeMark() { |
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136 _cgen->assembler()->flush(); |
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137 _cdesc->set_end(_cgen->assembler()->pc()); |
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138 assert(StubCodeDesc::_list == _cdesc, "expected order on list"); |
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139 _cgen->stub_epilog(_cdesc); |
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140 Forte::register_stub(_cdesc->name(), _cdesc->begin(), _cdesc->end()); |
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141 |
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142 if (JvmtiExport::should_post_dynamic_code_generated()) { |
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143 JvmtiExport::post_dynamic_code_generated(_cdesc->name(), _cdesc->begin(), _cdesc->end()); |
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144 } |
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145 } |