Mercurial > hg > truffle
annotate src/share/vm/oops/methodData.cpp @ 17747:f99e331f6ef6
8029162: G1: Shared SATB queue never enabled
Reviewed-by: brutisso, mgerdin, tschatzl
author | pliden |
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date | Fri, 10 Jan 2014 09:54:25 +0100 |
parents | 1a43981d86ea |
children | 606acabe7b5c |
rev | line source |
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0 | 1 /* |
7956 | 2 * Copyright (c) 2000, 2013, Oracle and/or its affiliates. All rights reserved. |
0 | 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 * | |
1552
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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. |
0 | 22 * |
23 */ | |
24 | |
1972 | 25 #include "precompiled.hpp" |
26 #include "classfile/systemDictionary.hpp" | |
27 #include "interpreter/bytecode.hpp" | |
28 #include "interpreter/bytecodeStream.hpp" | |
29 #include "interpreter/linkResolver.hpp" | |
7956 | 30 #include "memory/heapInspection.hpp" |
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31 #include "oops/methodData.hpp" |
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32 #include "prims/jvmtiRedefineClasses.hpp" |
1972 | 33 #include "runtime/compilationPolicy.hpp" |
34 #include "runtime/deoptimization.hpp" | |
35 #include "runtime/handles.inline.hpp" | |
0 | 36 |
37 // ================================================================== | |
38 // DataLayout | |
39 // | |
40 // Overlay for generic profiling data. | |
41 | |
42 // Some types of data layouts need a length field. | |
43 bool DataLayout::needs_array_len(u1 tag) { | |
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44 return (tag == multi_branch_data_tag) || (tag == arg_info_data_tag) || (tag == parameters_type_data_tag); |
0 | 45 } |
46 | |
47 // Perform generic initialization of the data. More specific | |
48 // initialization occurs in overrides of ProfileData::post_initialize. | |
49 void DataLayout::initialize(u1 tag, u2 bci, int cell_count) { | |
50 _header._bits = (intptr_t)0; | |
51 _header._struct._tag = tag; | |
52 _header._struct._bci = bci; | |
53 for (int i = 0; i < cell_count; i++) { | |
54 set_cell_at(i, (intptr_t)0); | |
55 } | |
56 if (needs_array_len(tag)) { | |
57 set_cell_at(ArrayData::array_len_off_set, cell_count - 1); // -1 for header. | |
58 } | |
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59 if (tag == call_type_data_tag) { |
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60 CallTypeData::initialize(this, cell_count); |
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61 } else if (tag == virtual_call_type_data_tag) { |
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62 VirtualCallTypeData::initialize(this, cell_count); |
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63 } |
0 | 64 } |
65 | |
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66 void DataLayout::clean_weak_klass_links(BoolObjectClosure* cl) { |
941 | 67 ResourceMark m; |
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68 data_in()->clean_weak_klass_links(cl); |
941 | 69 } |
70 | |
71 | |
0 | 72 // ================================================================== |
73 // ProfileData | |
74 // | |
75 // A ProfileData object is created to refer to a section of profiling | |
76 // data in a structured way. | |
77 | |
78 // Constructor for invalid ProfileData. | |
79 ProfileData::ProfileData() { | |
80 _data = NULL; | |
81 } | |
82 | |
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83 char* ProfileData::print_data_on_helper(const MethodData* md) const { |
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84 DataLayout* dp = md->extra_data_base(); |
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85 DataLayout* end = md->extra_data_limit(); |
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86 stringStream ss; |
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87 for (;; dp = MethodData::next_extra(dp)) { |
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88 assert(dp < end, "moved past end of extra data"); |
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89 switch(dp->tag()) { |
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90 case DataLayout::speculative_trap_data_tag: |
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91 if (dp->bci() == bci()) { |
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92 SpeculativeTrapData* data = new SpeculativeTrapData(dp); |
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93 int trap = data->trap_state(); |
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94 char buf[100]; |
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95 ss.print("trap/"); |
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96 data->method()->print_short_name(&ss); |
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97 ss.print("(%s) ", Deoptimization::format_trap_state(buf, sizeof(buf), trap)); |
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98 } |
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99 break; |
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100 case DataLayout::bit_data_tag: |
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101 break; |
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102 case DataLayout::no_tag: |
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103 case DataLayout::arg_info_data_tag: |
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104 return ss.as_string(); |
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105 break; |
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106 default: |
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107 fatal(err_msg("unexpected tag %d", dp->tag())); |
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108 } |
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109 } |
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110 return NULL; |
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111 } |
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112 |
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113 void ProfileData::print_data_on(outputStream* st, const MethodData* md) const { |
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114 print_data_on(st, print_data_on_helper(md)); |
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115 } |
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116 |
0 | 117 #ifndef PRODUCT |
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118 void ProfileData::print_shared(outputStream* st, const char* name, const char* extra) const { |
0 | 119 st->print("bci: %d", bci()); |
120 st->fill_to(tab_width_one); | |
121 st->print("%s", name); | |
122 tab(st); | |
123 int trap = trap_state(); | |
124 if (trap != 0) { | |
125 char buf[100]; | |
126 st->print("trap(%s) ", Deoptimization::format_trap_state(buf, sizeof(buf), trap)); | |
127 } | |
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128 if (extra != NULL) { |
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129 st->print(extra); |
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130 } |
0 | 131 int flags = data()->flags(); |
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132 if (flags != 0) { |
0 | 133 st->print("flags(%d) ", flags); |
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134 } |
0 | 135 } |
136 | |
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137 void ProfileData::tab(outputStream* st, bool first) const { |
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138 st->fill_to(first ? tab_width_one : tab_width_two); |
0 | 139 } |
140 #endif // !PRODUCT | |
141 | |
142 // ================================================================== | |
143 // BitData | |
144 // | |
145 // A BitData corresponds to a one-bit flag. This is used to indicate | |
146 // whether a checkcast bytecode has seen a null value. | |
147 | |
148 | |
149 #ifndef PRODUCT | |
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150 void BitData::print_data_on(outputStream* st, const char* extra) const { |
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151 print_shared(st, "BitData", extra); |
0 | 152 } |
153 #endif // !PRODUCT | |
154 | |
155 // ================================================================== | |
156 // CounterData | |
157 // | |
158 // A CounterData corresponds to a simple counter. | |
159 | |
160 #ifndef PRODUCT | |
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161 void CounterData::print_data_on(outputStream* st, const char* extra) const { |
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162 print_shared(st, "CounterData", extra); |
0 | 163 st->print_cr("count(%u)", count()); |
164 } | |
165 #endif // !PRODUCT | |
166 | |
167 // ================================================================== | |
168 // JumpData | |
169 // | |
170 // A JumpData is used to access profiling information for a direct | |
171 // branch. It is a counter, used for counting the number of branches, | |
172 // plus a data displacement, used for realigning the data pointer to | |
173 // the corresponding target bci. | |
174 | |
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175 void JumpData::post_initialize(BytecodeStream* stream, MethodData* mdo) { |
0 | 176 assert(stream->bci() == bci(), "wrong pos"); |
177 int target; | |
178 Bytecodes::Code c = stream->code(); | |
179 if (c == Bytecodes::_goto_w || c == Bytecodes::_jsr_w) { | |
180 target = stream->dest_w(); | |
181 } else { | |
182 target = stream->dest(); | |
183 } | |
184 int my_di = mdo->dp_to_di(dp()); | |
185 int target_di = mdo->bci_to_di(target); | |
186 int offset = target_di - my_di; | |
187 set_displacement(offset); | |
188 } | |
189 | |
190 #ifndef PRODUCT | |
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191 void JumpData::print_data_on(outputStream* st, const char* extra) const { |
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192 print_shared(st, "JumpData", extra); |
0 | 193 st->print_cr("taken(%u) displacement(%d)", taken(), displacement()); |
194 } | |
195 #endif // !PRODUCT | |
196 | |
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197 int TypeStackSlotEntries::compute_cell_count(Symbol* signature, bool include_receiver, int max) { |
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198 // Parameter profiling include the receiver |
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199 int args_count = include_receiver ? 1 : 0; |
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200 ResourceMark rm; |
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201 SignatureStream ss(signature); |
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202 args_count += ss.reference_parameter_count(); |
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203 args_count = MIN2(args_count, max); |
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204 return args_count * per_arg_cell_count; |
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205 } |
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206 |
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207 int TypeEntriesAtCall::compute_cell_count(BytecodeStream* stream) { |
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208 assert(Bytecodes::is_invoke(stream->code()), "should be invoke"); |
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209 assert(TypeStackSlotEntries::per_arg_count() > ReturnTypeEntry::static_cell_count(), "code to test for arguments/results broken"); |
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210 Bytecode_invoke inv(stream->method(), stream->bci()); |
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211 int args_cell = 0; |
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212 if (arguments_profiling_enabled()) { |
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213 args_cell = TypeStackSlotEntries::compute_cell_count(inv.signature(), false, TypeProfileArgsLimit); |
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214 } |
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215 int ret_cell = 0; |
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216 if (return_profiling_enabled() && (inv.result_type() == T_OBJECT || inv.result_type() == T_ARRAY)) { |
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217 ret_cell = ReturnTypeEntry::static_cell_count(); |
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218 } |
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219 int header_cell = 0; |
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220 if (args_cell + ret_cell > 0) { |
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221 header_cell = header_cell_count(); |
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222 } |
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223 |
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224 return header_cell + args_cell + ret_cell; |
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225 } |
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226 |
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227 class ArgumentOffsetComputer : public SignatureInfo { |
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228 private: |
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229 int _max; |
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230 GrowableArray<int> _offsets; |
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231 |
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232 void set(int size, BasicType type) { _size += size; } |
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233 void do_object(int begin, int end) { |
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234 if (_offsets.length() < _max) { |
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235 _offsets.push(_size); |
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236 } |
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237 SignatureInfo::do_object(begin, end); |
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238 } |
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239 void do_array (int begin, int end) { |
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240 if (_offsets.length() < _max) { |
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241 _offsets.push(_size); |
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242 } |
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243 SignatureInfo::do_array(begin, end); |
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244 } |
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245 |
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246 public: |
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247 ArgumentOffsetComputer(Symbol* signature, int max) |
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248 : SignatureInfo(signature), _max(max), _offsets(Thread::current(), max) { |
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249 } |
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250 |
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251 int total() { lazy_iterate_parameters(); return _size; } |
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252 |
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253 int off_at(int i) const { return _offsets.at(i); } |
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254 }; |
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255 |
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256 void TypeStackSlotEntries::post_initialize(Symbol* signature, bool has_receiver, bool include_receiver) { |
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257 ResourceMark rm; |
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258 int start = 0; |
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259 // Parameter profiling include the receiver |
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260 if (include_receiver && has_receiver) { |
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261 set_stack_slot(0, 0); |
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262 set_type(0, type_none()); |
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263 start += 1; |
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264 } |
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265 ArgumentOffsetComputer aos(signature, _number_of_entries-start); |
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266 aos.total(); |
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267 for (int i = start; i < _number_of_entries; i++) { |
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268 set_stack_slot(i, aos.off_at(i-start) + (has_receiver ? 1 : 0)); |
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269 set_type(i, type_none()); |
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270 } |
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271 } |
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272 |
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273 void CallTypeData::post_initialize(BytecodeStream* stream, MethodData* mdo) { |
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274 assert(Bytecodes::is_invoke(stream->code()), "should be invoke"); |
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275 Bytecode_invoke inv(stream->method(), stream->bci()); |
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276 |
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277 SignatureStream ss(inv.signature()); |
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278 if (has_arguments()) { |
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279 #ifdef ASSERT |
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280 ResourceMark rm; |
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281 int count = MIN2(ss.reference_parameter_count(), (int)TypeProfileArgsLimit); |
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282 assert(count > 0, "room for args type but none found?"); |
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283 check_number_of_arguments(count); |
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284 #endif |
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285 _args.post_initialize(inv.signature(), inv.has_receiver(), false); |
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286 } |
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287 |
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288 if (has_return()) { |
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289 assert(inv.result_type() == T_OBJECT || inv.result_type() == T_ARRAY, "room for a ret type but doesn't return obj?"); |
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290 _ret.post_initialize(); |
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291 } |
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292 } |
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293 |
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294 void VirtualCallTypeData::post_initialize(BytecodeStream* stream, MethodData* mdo) { |
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295 assert(Bytecodes::is_invoke(stream->code()), "should be invoke"); |
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296 Bytecode_invoke inv(stream->method(), stream->bci()); |
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297 |
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298 if (has_arguments()) { |
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299 #ifdef ASSERT |
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300 ResourceMark rm; |
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301 SignatureStream ss(inv.signature()); |
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302 int count = MIN2(ss.reference_parameter_count(), (int)TypeProfileArgsLimit); |
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303 assert(count > 0, "room for args type but none found?"); |
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304 check_number_of_arguments(count); |
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305 #endif |
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306 _args.post_initialize(inv.signature(), inv.has_receiver(), false); |
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307 } |
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308 |
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309 if (has_return()) { |
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310 assert(inv.result_type() == T_OBJECT || inv.result_type() == T_ARRAY, "room for a ret type but doesn't return obj?"); |
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311 _ret.post_initialize(); |
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312 } |
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313 } |
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314 |
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315 bool TypeEntries::is_loader_alive(BoolObjectClosure* is_alive_cl, intptr_t p) { |
13080 | 316 Klass* k = (Klass*)klass_part(p); |
317 return k != NULL && k->is_loader_alive(is_alive_cl); | |
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318 } |
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319 |
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320 void TypeStackSlotEntries::clean_weak_klass_links(BoolObjectClosure* is_alive_cl) { |
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321 for (int i = 0; i < _number_of_entries; i++) { |
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322 intptr_t p = type(i); |
13080 | 323 if (!is_loader_alive(is_alive_cl, p)) { |
324 set_type(i, with_status((Klass*)NULL, p)); | |
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325 } |
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326 } |
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327 } |
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328 |
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329 void ReturnTypeEntry::clean_weak_klass_links(BoolObjectClosure* is_alive_cl) { |
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330 intptr_t p = type(); |
13080 | 331 if (!is_loader_alive(is_alive_cl, p)) { |
332 set_type(with_status((Klass*)NULL, p)); | |
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333 } |
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334 } |
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335 |
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336 bool TypeEntriesAtCall::return_profiling_enabled() { |
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337 return MethodData::profile_return(); |
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338 } |
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339 |
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340 bool TypeEntriesAtCall::arguments_profiling_enabled() { |
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341 return MethodData::profile_arguments(); |
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342 } |
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343 |
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344 #ifndef PRODUCT |
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345 void TypeEntries::print_klass(outputStream* st, intptr_t k) { |
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346 if (is_type_none(k)) { |
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347 st->print("none"); |
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348 } else if (is_type_unknown(k)) { |
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349 st->print("unknown"); |
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350 } else { |
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351 valid_klass(k)->print_value_on(st); |
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352 } |
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353 if (was_null_seen(k)) { |
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354 st->print(" (null seen)"); |
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355 } |
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356 } |
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357 |
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358 void TypeStackSlotEntries::print_data_on(outputStream* st) const { |
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359 for (int i = 0; i < _number_of_entries; i++) { |
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360 _pd->tab(st); |
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361 st->print("%d: stack(%u) ", i, stack_slot(i)); |
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362 print_klass(st, type(i)); |
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363 st->cr(); |
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364 } |
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365 } |
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366 |
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367 void ReturnTypeEntry::print_data_on(outputStream* st) const { |
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368 _pd->tab(st); |
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369 print_klass(st, type()); |
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370 st->cr(); |
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371 } |
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372 |
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373 void CallTypeData::print_data_on(outputStream* st, const char* extra) const { |
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374 CounterData::print_data_on(st, extra); |
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375 if (has_arguments()) { |
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376 tab(st, true); |
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377 st->print("argument types"); |
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378 _args.print_data_on(st); |
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379 } |
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380 if (has_return()) { |
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381 tab(st, true); |
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382 st->print("return type"); |
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383 _ret.print_data_on(st); |
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384 } |
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385 } |
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386 |
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387 void VirtualCallTypeData::print_data_on(outputStream* st, const char* extra) const { |
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388 VirtualCallData::print_data_on(st, extra); |
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389 if (has_arguments()) { |
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390 tab(st, true); |
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391 st->print("argument types"); |
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392 _args.print_data_on(st); |
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393 } |
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394 if (has_return()) { |
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395 tab(st, true); |
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396 st->print("return type"); |
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397 _ret.print_data_on(st); |
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398 } |
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399 } |
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400 #endif |
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401 |
0 | 402 // ================================================================== |
403 // ReceiverTypeData | |
404 // | |
405 // A ReceiverTypeData is used to access profiling information about a | |
406 // dynamic type check. It consists of a counter which counts the total times | |
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407 // that the check is reached, and a series of (Klass*, count) pairs |
0 | 408 // which are used to store a type profile for the receiver of the check. |
409 | |
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410 void ReceiverTypeData::clean_weak_klass_links(BoolObjectClosure* is_alive_cl) { |
941 | 411 for (uint row = 0; row < row_limit(); row++) { |
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412 Klass* p = receiver(row); |
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413 if (p != NULL && !p->is_loader_alive(is_alive_cl)) { |
941 | 414 clear_row(row); |
415 } | |
416 } | |
417 } | |
418 | |
0 | 419 #ifndef PRODUCT |
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420 void ReceiverTypeData::print_receiver_data_on(outputStream* st) const { |
0 | 421 uint row; |
422 int entries = 0; | |
423 for (row = 0; row < row_limit(); row++) { | |
424 if (receiver(row) != NULL) entries++; | |
425 } | |
426 st->print_cr("count(%u) entries(%u)", count(), entries); | |
1783 | 427 int total = count(); |
428 for (row = 0; row < row_limit(); row++) { | |
429 if (receiver(row) != NULL) { | |
430 total += receiver_count(row); | |
431 } | |
432 } | |
0 | 433 for (row = 0; row < row_limit(); row++) { |
434 if (receiver(row) != NULL) { | |
435 tab(st); | |
436 receiver(row)->print_value_on(st); | |
1783 | 437 st->print_cr("(%u %4.2f)", receiver_count(row), (float) receiver_count(row) / (float) total); |
0 | 438 } |
439 } | |
440 } | |
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441 void ReceiverTypeData::print_data_on(outputStream* st, const char* extra) const { |
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442 print_shared(st, "ReceiverTypeData", extra); |
0 | 443 print_receiver_data_on(st); |
444 } | |
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445 void VirtualCallData::print_data_on(outputStream* st, const char* extra) const { |
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446 print_shared(st, "VirtualCallData", extra); |
0 | 447 print_receiver_data_on(st); |
448 } | |
449 #endif // !PRODUCT | |
450 | |
451 // ================================================================== | |
452 // RetData | |
453 // | |
454 // A RetData is used to access profiling information for a ret bytecode. | |
455 // It is composed of a count of the number of times that the ret has | |
456 // been executed, followed by a series of triples of the form | |
457 // (bci, count, di) which count the number of times that some bci was the | |
458 // target of the ret and cache a corresponding displacement. | |
459 | |
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460 void RetData::post_initialize(BytecodeStream* stream, MethodData* mdo) { |
0 | 461 for (uint row = 0; row < row_limit(); row++) { |
462 set_bci_displacement(row, -1); | |
463 set_bci(row, no_bci); | |
464 } | |
465 // release so other threads see a consistent state. bci is used as | |
466 // a valid flag for bci_displacement. | |
467 OrderAccess::release(); | |
468 } | |
469 | |
470 // This routine needs to atomically update the RetData structure, so the | |
471 // caller needs to hold the RetData_lock before it gets here. Since taking | |
472 // the lock can block (and allow GC) and since RetData is a ProfileData is a | |
473 // wrapper around a derived oop, taking the lock in _this_ method will | |
474 // basically cause the 'this' pointer's _data field to contain junk after the | |
475 // lock. We require the caller to take the lock before making the ProfileData | |
476 // structure. Currently the only caller is InterpreterRuntime::update_mdp_for_ret | |
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477 address RetData::fixup_ret(int return_bci, MethodData* h_mdo) { |
0 | 478 // First find the mdp which corresponds to the return bci. |
479 address mdp = h_mdo->bci_to_dp(return_bci); | |
480 | |
481 // Now check to see if any of the cache slots are open. | |
482 for (uint row = 0; row < row_limit(); row++) { | |
483 if (bci(row) == no_bci) { | |
484 set_bci_displacement(row, mdp - dp()); | |
485 set_bci_count(row, DataLayout::counter_increment); | |
486 // Barrier to ensure displacement is written before the bci; allows | |
487 // the interpreter to read displacement without fear of race condition. | |
488 release_set_bci(row, return_bci); | |
489 break; | |
490 } | |
491 } | |
492 return mdp; | |
493 } | |
494 | |
495 | |
496 #ifndef PRODUCT | |
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497 void RetData::print_data_on(outputStream* st, const char* extra) const { |
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498 print_shared(st, "RetData", extra); |
0 | 499 uint row; |
500 int entries = 0; | |
501 for (row = 0; row < row_limit(); row++) { | |
502 if (bci(row) != no_bci) entries++; | |
503 } | |
504 st->print_cr("count(%u) entries(%u)", count(), entries); | |
505 for (row = 0; row < row_limit(); row++) { | |
506 if (bci(row) != no_bci) { | |
507 tab(st); | |
508 st->print_cr("bci(%d: count(%u) displacement(%d))", | |
509 bci(row), bci_count(row), bci_displacement(row)); | |
510 } | |
511 } | |
512 } | |
513 #endif // !PRODUCT | |
514 | |
515 // ================================================================== | |
516 // BranchData | |
517 // | |
518 // A BranchData is used to access profiling data for a two-way branch. | |
519 // It consists of taken and not_taken counts as well as a data displacement | |
520 // for the taken case. | |
521 | |
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522 void BranchData::post_initialize(BytecodeStream* stream, MethodData* mdo) { |
0 | 523 assert(stream->bci() == bci(), "wrong pos"); |
524 int target = stream->dest(); | |
525 int my_di = mdo->dp_to_di(dp()); | |
526 int target_di = mdo->bci_to_di(target); | |
527 int offset = target_di - my_di; | |
528 set_displacement(offset); | |
529 } | |
530 | |
531 #ifndef PRODUCT | |
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532 void BranchData::print_data_on(outputStream* st, const char* extra) const { |
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533 print_shared(st, "BranchData", extra); |
0 | 534 st->print_cr("taken(%u) displacement(%d)", |
535 taken(), displacement()); | |
536 tab(st); | |
537 st->print_cr("not taken(%u)", not_taken()); | |
538 } | |
539 #endif | |
540 | |
541 // ================================================================== | |
542 // MultiBranchData | |
543 // | |
544 // A MultiBranchData is used to access profiling information for | |
545 // a multi-way branch (*switch bytecodes). It consists of a series | |
546 // of (count, displacement) pairs, which count the number of times each | |
547 // case was taken and specify the data displacment for each branch target. | |
548 | |
549 int MultiBranchData::compute_cell_count(BytecodeStream* stream) { | |
550 int cell_count = 0; | |
551 if (stream->code() == Bytecodes::_tableswitch) { | |
2142 | 552 Bytecode_tableswitch sw(stream->method()(), stream->bcp()); |
553 cell_count = 1 + per_case_cell_count * (1 + sw.length()); // 1 for default | |
0 | 554 } else { |
2142 | 555 Bytecode_lookupswitch sw(stream->method()(), stream->bcp()); |
556 cell_count = 1 + per_case_cell_count * (sw.number_of_pairs() + 1); // 1 for default | |
0 | 557 } |
558 return cell_count; | |
559 } | |
560 | |
561 void MultiBranchData::post_initialize(BytecodeStream* stream, | |
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562 MethodData* mdo) { |
0 | 563 assert(stream->bci() == bci(), "wrong pos"); |
564 int target; | |
565 int my_di; | |
566 int target_di; | |
567 int offset; | |
568 if (stream->code() == Bytecodes::_tableswitch) { | |
2142 | 569 Bytecode_tableswitch sw(stream->method()(), stream->bcp()); |
570 int len = sw.length(); | |
0 | 571 assert(array_len() == per_case_cell_count * (len + 1), "wrong len"); |
572 for (int count = 0; count < len; count++) { | |
2142 | 573 target = sw.dest_offset_at(count) + bci(); |
0 | 574 my_di = mdo->dp_to_di(dp()); |
575 target_di = mdo->bci_to_di(target); | |
576 offset = target_di - my_di; | |
577 set_displacement_at(count, offset); | |
578 } | |
2142 | 579 target = sw.default_offset() + bci(); |
0 | 580 my_di = mdo->dp_to_di(dp()); |
581 target_di = mdo->bci_to_di(target); | |
582 offset = target_di - my_di; | |
583 set_default_displacement(offset); | |
584 | |
585 } else { | |
2142 | 586 Bytecode_lookupswitch sw(stream->method()(), stream->bcp()); |
587 int npairs = sw.number_of_pairs(); | |
0 | 588 assert(array_len() == per_case_cell_count * (npairs + 1), "wrong len"); |
589 for (int count = 0; count < npairs; count++) { | |
2142 | 590 LookupswitchPair pair = sw.pair_at(count); |
591 target = pair.offset() + bci(); | |
0 | 592 my_di = mdo->dp_to_di(dp()); |
593 target_di = mdo->bci_to_di(target); | |
594 offset = target_di - my_di; | |
595 set_displacement_at(count, offset); | |
596 } | |
2142 | 597 target = sw.default_offset() + bci(); |
0 | 598 my_di = mdo->dp_to_di(dp()); |
599 target_di = mdo->bci_to_di(target); | |
600 offset = target_di - my_di; | |
601 set_default_displacement(offset); | |
602 } | |
603 } | |
604 | |
605 #ifndef PRODUCT | |
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606 void MultiBranchData::print_data_on(outputStream* st, const char* extra) const { |
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607 print_shared(st, "MultiBranchData", extra); |
0 | 608 st->print_cr("default_count(%u) displacement(%d)", |
609 default_count(), default_displacement()); | |
610 int cases = number_of_cases(); | |
611 for (int i = 0; i < cases; i++) { | |
612 tab(st); | |
613 st->print_cr("count(%u) displacement(%d)", | |
614 count_at(i), displacement_at(i)); | |
615 } | |
616 } | |
617 #endif | |
618 | |
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619 #ifndef PRODUCT |
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620 void ArgInfoData::print_data_on(outputStream* st, const char* extra) const { |
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621 print_shared(st, "ArgInfoData", extra); |
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622 int nargs = number_of_args(); |
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623 for (int i = 0; i < nargs; i++) { |
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624 st->print(" 0x%x", arg_modified(i)); |
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625 } |
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626 st->cr(); |
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627 } |
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628 |
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629 #endif |
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630 |
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631 int ParametersTypeData::compute_cell_count(Method* m) { |
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632 if (!MethodData::profile_parameters_for_method(m)) { |
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633 return 0; |
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634 } |
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635 int max = TypeProfileParmsLimit == -1 ? INT_MAX : TypeProfileParmsLimit; |
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636 int obj_args = TypeStackSlotEntries::compute_cell_count(m->signature(), !m->is_static(), max); |
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637 if (obj_args > 0) { |
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638 return obj_args + 1; // 1 cell for array len |
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639 } |
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640 return 0; |
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641 } |
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642 |
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643 void ParametersTypeData::post_initialize(BytecodeStream* stream, MethodData* mdo) { |
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644 _parameters.post_initialize(mdo->method()->signature(), !mdo->method()->is_static(), true); |
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645 } |
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646 |
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647 bool ParametersTypeData::profiling_enabled() { |
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648 return MethodData::profile_parameters(); |
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649 } |
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650 |
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651 #ifndef PRODUCT |
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652 void ParametersTypeData::print_data_on(outputStream* st, const char* extra) const { |
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653 st->print("parameter types", extra); |
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654 _parameters.print_data_on(st); |
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655 } |
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656 |
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657 void SpeculativeTrapData::print_data_on(outputStream* st, const char* extra) const { |
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658 print_shared(st, "SpeculativeTrapData", extra); |
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659 tab(st); |
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660 method()->print_short_name(st); |
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661 st->cr(); |
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662 } |
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663 #endif |
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664 |
0 | 665 // ================================================================== |
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666 // MethodData* |
0 | 667 // |
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668 // A MethodData* holds information which has been collected about |
0 | 669 // a method. |
670 | |
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671 MethodData* MethodData::allocate(ClassLoaderData* loader_data, methodHandle method, TRAPS) { |
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672 int size = MethodData::compute_allocation_size_in_words(method); |
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673 |
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674 return new (loader_data, size, false, MetaspaceObj::MethodDataType, THREAD) |
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675 MethodData(method(), size, CHECK_NULL); |
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676 } |
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677 |
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678 int MethodData::bytecode_cell_count(Bytecodes::Code code) { |
8860 | 679 #if defined(COMPILER1) && !defined(COMPILER2) |
680 return no_profile_data; | |
681 #else | |
0 | 682 switch (code) { |
683 case Bytecodes::_checkcast: | |
684 case Bytecodes::_instanceof: | |
685 case Bytecodes::_aastore: | |
686 if (TypeProfileCasts) { | |
687 return ReceiverTypeData::static_cell_count(); | |
688 } else { | |
689 return BitData::static_cell_count(); | |
690 } | |
691 case Bytecodes::_invokespecial: | |
692 case Bytecodes::_invokestatic: | |
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693 if (MethodData::profile_arguments() || MethodData::profile_return()) { |
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694 return variable_cell_count; |
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695 } else { |
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696 return CounterData::static_cell_count(); |
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697 } |
0 | 698 case Bytecodes::_goto: |
699 case Bytecodes::_goto_w: | |
700 case Bytecodes::_jsr: | |
701 case Bytecodes::_jsr_w: | |
702 return JumpData::static_cell_count(); | |
703 case Bytecodes::_invokevirtual: | |
704 case Bytecodes::_invokeinterface: | |
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705 if (MethodData::profile_arguments() || MethodData::profile_return()) { |
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706 return variable_cell_count; |
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707 } else { |
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708 return VirtualCallData::static_cell_count(); |
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709 } |
726
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710 case Bytecodes::_invokedynamic: |
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711 if (MethodData::profile_arguments() || MethodData::profile_return()) { |
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712 return variable_cell_count; |
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713 } else { |
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714 return CounterData::static_cell_count(); |
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715 } |
0 | 716 case Bytecodes::_ret: |
717 return RetData::static_cell_count(); | |
718 case Bytecodes::_ifeq: | |
719 case Bytecodes::_ifne: | |
720 case Bytecodes::_iflt: | |
721 case Bytecodes::_ifge: | |
722 case Bytecodes::_ifgt: | |
723 case Bytecodes::_ifle: | |
724 case Bytecodes::_if_icmpeq: | |
725 case Bytecodes::_if_icmpne: | |
726 case Bytecodes::_if_icmplt: | |
727 case Bytecodes::_if_icmpge: | |
728 case Bytecodes::_if_icmpgt: | |
729 case Bytecodes::_if_icmple: | |
730 case Bytecodes::_if_acmpeq: | |
731 case Bytecodes::_if_acmpne: | |
732 case Bytecodes::_ifnull: | |
733 case Bytecodes::_ifnonnull: | |
734 return BranchData::static_cell_count(); | |
735 case Bytecodes::_lookupswitch: | |
736 case Bytecodes::_tableswitch: | |
737 return variable_cell_count; | |
738 } | |
739 return no_profile_data; | |
8860 | 740 #endif |
0 | 741 } |
742 | |
743 // Compute the size of the profiling information corresponding to | |
744 // the current bytecode. | |
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745 int MethodData::compute_data_size(BytecodeStream* stream) { |
0 | 746 int cell_count = bytecode_cell_count(stream->code()); |
747 if (cell_count == no_profile_data) { | |
748 return 0; | |
749 } | |
750 if (cell_count == variable_cell_count) { | |
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751 switch (stream->code()) { |
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752 case Bytecodes::_lookupswitch: |
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753 case Bytecodes::_tableswitch: |
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754 cell_count = MultiBranchData::compute_cell_count(stream); |
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755 break; |
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756 case Bytecodes::_invokespecial: |
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757 case Bytecodes::_invokestatic: |
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758 case Bytecodes::_invokedynamic: |
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759 assert(MethodData::profile_arguments() || MethodData::profile_return(), "should be collecting args profile"); |
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760 if (profile_arguments_for_invoke(stream->method(), stream->bci()) || |
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761 profile_return_for_invoke(stream->method(), stream->bci())) { |
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762 cell_count = CallTypeData::compute_cell_count(stream); |
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763 } else { |
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764 cell_count = CounterData::static_cell_count(); |
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765 } |
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766 break; |
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767 case Bytecodes::_invokevirtual: |
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768 case Bytecodes::_invokeinterface: { |
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769 assert(MethodData::profile_arguments() || MethodData::profile_return(), "should be collecting args profile"); |
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770 if (profile_arguments_for_invoke(stream->method(), stream->bci()) || |
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771 profile_return_for_invoke(stream->method(), stream->bci())) { |
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772 cell_count = VirtualCallTypeData::compute_cell_count(stream); |
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773 } else { |
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774 cell_count = VirtualCallData::static_cell_count(); |
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775 } |
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776 break; |
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777 } |
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778 default: |
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779 fatal("unexpected bytecode for var length profile data"); |
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780 } |
0 | 781 } |
782 // Note: cell_count might be zero, meaning that there is just | |
783 // a DataLayout header, with no extra cells. | |
784 assert(cell_count >= 0, "sanity"); | |
785 return DataLayout::compute_size_in_bytes(cell_count); | |
786 } | |
787 | |
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788 bool MethodData::is_speculative_trap_bytecode(Bytecodes::Code code) { |
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789 // Bytecodes for which we may use speculation |
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790 switch (code) { |
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791 case Bytecodes::_checkcast: |
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792 case Bytecodes::_instanceof: |
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793 case Bytecodes::_aastore: |
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794 case Bytecodes::_invokevirtual: |
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795 case Bytecodes::_invokeinterface: |
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796 case Bytecodes::_if_acmpeq: |
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797 case Bytecodes::_if_acmpne: |
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798 case Bytecodes::_invokestatic: |
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799 #ifdef COMPILER2 |
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800 return UseTypeSpeculation; |
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801 #endif |
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802 default: |
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803 return false; |
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804 } |
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805 return false; |
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806 } |
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807 |
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808 int MethodData::compute_extra_data_count(int data_size, int empty_bc_count, bool needs_speculative_traps) { |
0 | 809 if (ProfileTraps) { |
810 // Assume that up to 3% of BCIs with no MDP will need to allocate one. | |
811 int extra_data_count = (uint)(empty_bc_count * 3) / 128 + 1; | |
812 // If the method is large, let the extra BCIs grow numerous (to ~1%). | |
813 int one_percent_of_data | |
814 = (uint)data_size / (DataLayout::header_size_in_bytes()*128); | |
815 if (extra_data_count < one_percent_of_data) | |
816 extra_data_count = one_percent_of_data; | |
817 if (extra_data_count > empty_bc_count) | |
818 extra_data_count = empty_bc_count; // no need for more | |
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819 |
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820 // Make sure we have a minimum number of extra data slots to |
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821 // allocate SpeculativeTrapData entries. We would want to have one |
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822 // entry per compilation that inlines this method and for which |
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823 // some type speculation assumption fails. So the room we need for |
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824 // the SpeculativeTrapData entries doesn't directly depend on the |
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825 // size of the method. Because it's hard to estimate, we reserve |
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826 // space for an arbitrary number of entries. |
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827 int spec_data_count = (needs_speculative_traps ? SpecTrapLimitExtraEntries : 0) * |
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828 (SpeculativeTrapData::static_cell_count() + DataLayout::header_size_in_cells()); |
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829 |
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830 return MAX2(extra_data_count, spec_data_count); |
0 | 831 } else { |
832 return 0; | |
833 } | |
834 } | |
835 | |
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836 // Compute the size of the MethodData* necessary to store |
0 | 837 // profiling information about a given method. Size is in bytes. |
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838 int MethodData::compute_allocation_size_in_bytes(methodHandle method) { |
0 | 839 int data_size = 0; |
840 BytecodeStream stream(method); | |
841 Bytecodes::Code c; | |
842 int empty_bc_count = 0; // number of bytecodes lacking data | |
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843 bool needs_speculative_traps = false; |
0 | 844 while ((c = stream.next()) >= 0) { |
845 int size_in_bytes = compute_data_size(&stream); | |
846 data_size += size_in_bytes; | |
847 if (size_in_bytes == 0) empty_bc_count += 1; | |
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848 needs_speculative_traps = needs_speculative_traps || is_speculative_trap_bytecode(c); |
0 | 849 } |
850 int object_size = in_bytes(data_offset()) + data_size; | |
851 | |
852 // Add some extra DataLayout cells (at least one) to track stray traps. | |
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853 int extra_data_count = compute_extra_data_count(data_size, empty_bc_count, needs_speculative_traps); |
0 | 854 object_size += extra_data_count * DataLayout::compute_size_in_bytes(0); |
855 | |
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856 // Add a cell to record information about modified arguments. |
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857 int arg_size = method->size_of_parameters(); |
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858 object_size += DataLayout::compute_size_in_bytes(arg_size+1); |
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859 |
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860 // Reserve room for an area of the MDO dedicated to profiling of |
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861 // parameters |
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862 int args_cell = ParametersTypeData::compute_cell_count(method()); |
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863 if (args_cell > 0) { |
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864 object_size += DataLayout::compute_size_in_bytes(args_cell); |
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865 } |
0 | 866 return object_size; |
867 } | |
868 | |
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869 // Compute the size of the MethodData* necessary to store |
0 | 870 // profiling information about a given method. Size is in words |
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871 int MethodData::compute_allocation_size_in_words(methodHandle method) { |
0 | 872 int byte_size = compute_allocation_size_in_bytes(method); |
873 int word_size = align_size_up(byte_size, BytesPerWord) / BytesPerWord; | |
874 return align_object_size(word_size); | |
875 } | |
876 | |
877 // Initialize an individual data segment. Returns the size of | |
878 // the segment in bytes. | |
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879 int MethodData::initialize_data(BytecodeStream* stream, |
0 | 880 int data_index) { |
8860 | 881 #if defined(COMPILER1) && !defined(COMPILER2) |
882 return 0; | |
883 #else | |
0 | 884 int cell_count = -1; |
885 int tag = DataLayout::no_tag; | |
886 DataLayout* data_layout = data_layout_at(data_index); | |
887 Bytecodes::Code c = stream->code(); | |
888 switch (c) { | |
889 case Bytecodes::_checkcast: | |
890 case Bytecodes::_instanceof: | |
891 case Bytecodes::_aastore: | |
892 if (TypeProfileCasts) { | |
893 cell_count = ReceiverTypeData::static_cell_count(); | |
894 tag = DataLayout::receiver_type_data_tag; | |
895 } else { | |
896 cell_count = BitData::static_cell_count(); | |
897 tag = DataLayout::bit_data_tag; | |
898 } | |
899 break; | |
900 case Bytecodes::_invokespecial: | |
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901 case Bytecodes::_invokestatic: { |
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902 int counter_data_cell_count = CounterData::static_cell_count(); |
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903 if (profile_arguments_for_invoke(stream->method(), stream->bci()) || |
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904 profile_return_for_invoke(stream->method(), stream->bci())) { |
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905 cell_count = CallTypeData::compute_cell_count(stream); |
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906 } else { |
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907 cell_count = counter_data_cell_count; |
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908 } |
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909 if (cell_count > counter_data_cell_count) { |
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910 tag = DataLayout::call_type_data_tag; |
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911 } else { |
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912 tag = DataLayout::counter_data_tag; |
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913 } |
0 | 914 break; |
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915 } |
0 | 916 case Bytecodes::_goto: |
917 case Bytecodes::_goto_w: | |
918 case Bytecodes::_jsr: | |
919 case Bytecodes::_jsr_w: | |
920 cell_count = JumpData::static_cell_count(); | |
921 tag = DataLayout::jump_data_tag; | |
922 break; | |
923 case Bytecodes::_invokevirtual: | |
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924 case Bytecodes::_invokeinterface: { |
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925 int virtual_call_data_cell_count = VirtualCallData::static_cell_count(); |
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926 if (profile_arguments_for_invoke(stream->method(), stream->bci()) || |
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927 profile_return_for_invoke(stream->method(), stream->bci())) { |
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928 cell_count = VirtualCallTypeData::compute_cell_count(stream); |
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929 } else { |
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930 cell_count = virtual_call_data_cell_count; |
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931 } |
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932 if (cell_count > virtual_call_data_cell_count) { |
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933 tag = DataLayout::virtual_call_type_data_tag; |
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934 } else { |
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935 tag = DataLayout::virtual_call_data_tag; |
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936 } |
0 | 937 break; |
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938 } |
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939 case Bytecodes::_invokedynamic: { |
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940 // %%% should make a type profile for any invokedynamic that takes a ref argument |
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941 int counter_data_cell_count = CounterData::static_cell_count(); |
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942 if (profile_arguments_for_invoke(stream->method(), stream->bci()) || |
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943 profile_return_for_invoke(stream->method(), stream->bci())) { |
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944 cell_count = CallTypeData::compute_cell_count(stream); |
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945 } else { |
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946 cell_count = counter_data_cell_count; |
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947 } |
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948 if (cell_count > counter_data_cell_count) { |
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949 tag = DataLayout::call_type_data_tag; |
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950 } else { |
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951 tag = DataLayout::counter_data_tag; |
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952 } |
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953 break; |
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954 } |
0 | 955 case Bytecodes::_ret: |
956 cell_count = RetData::static_cell_count(); | |
957 tag = DataLayout::ret_data_tag; | |
958 break; | |
959 case Bytecodes::_ifeq: | |
960 case Bytecodes::_ifne: | |
961 case Bytecodes::_iflt: | |
962 case Bytecodes::_ifge: | |
963 case Bytecodes::_ifgt: | |
964 case Bytecodes::_ifle: | |
965 case Bytecodes::_if_icmpeq: | |
966 case Bytecodes::_if_icmpne: | |
967 case Bytecodes::_if_icmplt: | |
968 case Bytecodes::_if_icmpge: | |
969 case Bytecodes::_if_icmpgt: | |
970 case Bytecodes::_if_icmple: | |
971 case Bytecodes::_if_acmpeq: | |
972 case Bytecodes::_if_acmpne: | |
973 case Bytecodes::_ifnull: | |
974 case Bytecodes::_ifnonnull: | |
975 cell_count = BranchData::static_cell_count(); | |
976 tag = DataLayout::branch_data_tag; | |
977 break; | |
978 case Bytecodes::_lookupswitch: | |
979 case Bytecodes::_tableswitch: | |
980 cell_count = MultiBranchData::compute_cell_count(stream); | |
981 tag = DataLayout::multi_branch_data_tag; | |
982 break; | |
983 } | |
984 assert(tag == DataLayout::multi_branch_data_tag || | |
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985 ((MethodData::profile_arguments() || MethodData::profile_return()) && |
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986 (tag == DataLayout::call_type_data_tag || |
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987 tag == DataLayout::counter_data_tag || |
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988 tag == DataLayout::virtual_call_type_data_tag || |
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989 tag == DataLayout::virtual_call_data_tag)) || |
0 | 990 cell_count == bytecode_cell_count(c), "cell counts must agree"); |
991 if (cell_count >= 0) { | |
992 assert(tag != DataLayout::no_tag, "bad tag"); | |
993 assert(bytecode_has_profile(c), "agree w/ BHP"); | |
994 data_layout->initialize(tag, stream->bci(), cell_count); | |
995 return DataLayout::compute_size_in_bytes(cell_count); | |
996 } else { | |
997 assert(!bytecode_has_profile(c), "agree w/ !BHP"); | |
998 return 0; | |
999 } | |
8860 | 1000 #endif |
0 | 1001 } |
1002 | |
1003 // Get the data at an arbitrary (sort of) data index. | |
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1004 ProfileData* MethodData::data_at(int data_index) const { |
0 | 1005 if (out_of_bounds(data_index)) { |
1006 return NULL; | |
1007 } | |
1008 DataLayout* data_layout = data_layout_at(data_index); | |
941 | 1009 return data_layout->data_in(); |
1010 } | |
0 | 1011 |
941 | 1012 ProfileData* DataLayout::data_in() { |
1013 switch (tag()) { | |
0 | 1014 case DataLayout::no_tag: |
1015 default: | |
1016 ShouldNotReachHere(); | |
1017 return NULL; | |
1018 case DataLayout::bit_data_tag: | |
941 | 1019 return new BitData(this); |
0 | 1020 case DataLayout::counter_data_tag: |
941 | 1021 return new CounterData(this); |
0 | 1022 case DataLayout::jump_data_tag: |
941 | 1023 return new JumpData(this); |
0 | 1024 case DataLayout::receiver_type_data_tag: |
941 | 1025 return new ReceiverTypeData(this); |
0 | 1026 case DataLayout::virtual_call_data_tag: |
941 | 1027 return new VirtualCallData(this); |
0 | 1028 case DataLayout::ret_data_tag: |
941 | 1029 return new RetData(this); |
0 | 1030 case DataLayout::branch_data_tag: |
941 | 1031 return new BranchData(this); |
0 | 1032 case DataLayout::multi_branch_data_tag: |
941 | 1033 return new MultiBranchData(this); |
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1034 case DataLayout::arg_info_data_tag: |
941 | 1035 return new ArgInfoData(this); |
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1036 case DataLayout::call_type_data_tag: |
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1037 return new CallTypeData(this); |
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1038 case DataLayout::virtual_call_type_data_tag: |
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1039 return new VirtualCallTypeData(this); |
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1040 case DataLayout::parameters_type_data_tag: |
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1041 return new ParametersTypeData(this); |
0 | 1042 }; |
1043 } | |
1044 | |
1045 // Iteration over data. | |
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1046 ProfileData* MethodData::next_data(ProfileData* current) const { |
0 | 1047 int current_index = dp_to_di(current->dp()); |
1048 int next_index = current_index + current->size_in_bytes(); | |
1049 ProfileData* next = data_at(next_index); | |
1050 return next; | |
1051 } | |
1052 | |
1053 // Give each of the data entries a chance to perform specific | |
1054 // data initialization. | |
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1055 void MethodData::post_initialize(BytecodeStream* stream) { |
0 | 1056 ResourceMark rm; |
1057 ProfileData* data; | |
1058 for (data = first_data(); is_valid(data); data = next_data(data)) { | |
1059 stream->set_start(data->bci()); | |
1060 stream->next(); | |
1061 data->post_initialize(stream, this); | |
1062 } | |
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1063 if (_parameters_type_data_di != -1) { |
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1064 parameters_type_data()->post_initialize(NULL, this); |
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1065 } |
0 | 1066 } |
1067 | |
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1068 // Initialize the MethodData* corresponding to a given method. |
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1069 MethodData::MethodData(methodHandle method, int size, TRAPS) |
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1070 : _extra_data_lock(Monitor::leaf, "MDO extra data lock") { |
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1071 No_Safepoint_Verifier no_safepoint; // init function atomic wrt GC |
0 | 1072 ResourceMark rm; |
1073 // Set the method back-pointer. | |
1074 _method = method(); | |
1783 | 1075 |
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1076 init(); |
0 | 1077 set_creation_mileage(mileage_of(method())); |
1078 | |
1079 // Go through the bytecodes and allocate and initialize the | |
1080 // corresponding data cells. | |
1081 int data_size = 0; | |
1082 int empty_bc_count = 0; // number of bytecodes lacking data | |
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1083 _data[0] = 0; // apparently not set below. |
0 | 1084 BytecodeStream stream(method); |
1085 Bytecodes::Code c; | |
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1086 bool needs_speculative_traps = false; |
0 | 1087 while ((c = stream.next()) >= 0) { |
1088 int size_in_bytes = initialize_data(&stream, data_size); | |
1089 data_size += size_in_bytes; | |
1090 if (size_in_bytes == 0) empty_bc_count += 1; | |
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1091 needs_speculative_traps = needs_speculative_traps || is_speculative_trap_bytecode(c); |
0 | 1092 } |
1093 _data_size = data_size; | |
1094 int object_size = in_bytes(data_offset()) + data_size; | |
1095 | |
1096 // Add some extra DataLayout cells (at least one) to track stray traps. | |
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1097 int extra_data_count = compute_extra_data_count(data_size, empty_bc_count, needs_speculative_traps); |
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1098 int extra_size = extra_data_count * DataLayout::compute_size_in_bytes(0); |
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1099 |
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1100 // Let's zero the space for the extra data |
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1101 Copy::zero_to_bytes(((address)_data) + data_size, extra_size); |
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1102 |
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1103 // Add a cell to record information about modified arguments. |
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1104 // Set up _args_modified array after traps cells so that |
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1105 // the code for traps cells works. |
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1106 DataLayout *dp = data_layout_at(data_size + extra_size); |
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1107 |
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1108 int arg_size = method->size_of_parameters(); |
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1109 dp->initialize(DataLayout::arg_info_data_tag, 0, arg_size+1); |
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1110 |
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1111 int arg_data_size = DataLayout::compute_size_in_bytes(arg_size+1); |
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1112 object_size += extra_size + arg_data_size; |
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1113 |
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1114 int parms_cell = ParametersTypeData::compute_cell_count(method()); |
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1115 // If we are profiling parameters, we reserver an area near the end |
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1116 // of the MDO after the slots for bytecodes (because there's no bci |
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1117 // for method entry so they don't fit with the framework for the |
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1118 // profiling of bytecodes). We store the offset within the MDO of |
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1119 // this area (or -1 if no parameter is profiled) |
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1120 if (parms_cell > 0) { |
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1121 object_size += DataLayout::compute_size_in_bytes(parms_cell); |
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1122 _parameters_type_data_di = data_size + extra_size + arg_data_size; |
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1123 DataLayout *dp = data_layout_at(data_size + extra_size + arg_data_size); |
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1124 dp->initialize(DataLayout::parameters_type_data_tag, 0, parms_cell); |
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1125 } else { |
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1126 _parameters_type_data_di = -1; |
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1127 } |
0 | 1128 |
1129 // Set an initial hint. Don't use set_hint_di() because | |
1130 // first_di() may be out of bounds if data_size is 0. | |
1131 // In that situation, _hint_di is never used, but at | |
1132 // least well-defined. | |
1133 _hint_di = first_di(); | |
1134 | |
1135 post_initialize(&stream); | |
1136 | |
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1137 set_size(object_size); |
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1138 } |
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1139 |
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1140 void MethodData::init() { |
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1141 _invocation_counter.init(); |
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1142 _backedge_counter.init(); |
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1143 _invocation_counter_start = 0; |
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1144 _backedge_counter_start = 0; |
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1145 _num_loops = 0; |
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1146 _num_blocks = 0; |
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1147 _highest_comp_level = 0; |
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1148 _highest_osr_comp_level = 0; |
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1149 _would_profile = true; |
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1150 |
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1151 // Initialize flags and trap history. |
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1152 _nof_decompiles = 0; |
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1153 _nof_overflow_recompiles = 0; |
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1154 _nof_overflow_traps = 0; |
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1155 clear_escape_info(); |
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1156 assert(sizeof(_trap_hist) % sizeof(HeapWord) == 0, "align"); |
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1157 Copy::zero_to_words((HeapWord*) &_trap_hist, |
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1158 sizeof(_trap_hist) / sizeof(HeapWord)); |
0 | 1159 } |
1160 | |
1161 // Get a measure of how much mileage the method has on it. | |
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1162 int MethodData::mileage_of(Method* method) { |
0 | 1163 int mileage = 0; |
1783 | 1164 if (TieredCompilation) { |
1165 mileage = MAX2(method->invocation_count(), method->backedge_count()); | |
1166 } else { | |
1167 int iic = method->interpreter_invocation_count(); | |
1168 if (mileage < iic) mileage = iic; | |
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1169 MethodCounters* mcs = method->method_counters(); |
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1170 if (mcs != NULL) { |
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1171 InvocationCounter* ic = mcs->invocation_counter(); |
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1172 InvocationCounter* bc = mcs->backedge_counter(); |
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1173 int icval = ic->count(); |
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1174 if (ic->carry()) icval += CompileThreshold; |
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1175 if (mileage < icval) mileage = icval; |
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1176 int bcval = bc->count(); |
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1177 if (bc->carry()) bcval += CompileThreshold; |
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1178 if (mileage < bcval) mileage = bcval; |
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1179 } |
1783 | 1180 } |
0 | 1181 return mileage; |
1182 } | |
1183 | |
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1184 bool MethodData::is_mature() const { |
1783 | 1185 return CompilationPolicy::policy()->is_mature(_method); |
0 | 1186 } |
1187 | |
1188 // Translate a bci to its corresponding data index (di). | |
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1189 address MethodData::bci_to_dp(int bci) { |
0 | 1190 ResourceMark rm; |
1191 ProfileData* data = data_before(bci); | |
1192 ProfileData* prev = NULL; | |
1193 for ( ; is_valid(data); data = next_data(data)) { | |
1194 if (data->bci() >= bci) { | |
1195 if (data->bci() == bci) set_hint_di(dp_to_di(data->dp())); | |
1196 else if (prev != NULL) set_hint_di(dp_to_di(prev->dp())); | |
1197 return data->dp(); | |
1198 } | |
1199 prev = data; | |
1200 } | |
1201 return (address)limit_data_position(); | |
1202 } | |
1203 | |
1204 // Translate a bci to its corresponding data, or NULL. | |
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1205 ProfileData* MethodData::bci_to_data(int bci) { |
0 | 1206 ProfileData* data = data_before(bci); |
1207 for ( ; is_valid(data); data = next_data(data)) { | |
1208 if (data->bci() == bci) { | |
1209 set_hint_di(dp_to_di(data->dp())); | |
1210 return data; | |
1211 } else if (data->bci() > bci) { | |
1212 break; | |
1213 } | |
1214 } | |
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1215 return bci_to_extra_data(bci, NULL, false); |
0 | 1216 } |
1217 | |
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1218 DataLayout* MethodData::next_extra(DataLayout* dp) { |
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1219 int nb_cells = 0; |
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1220 switch(dp->tag()) { |
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1221 case DataLayout::bit_data_tag: |
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1222 case DataLayout::no_tag: |
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1223 nb_cells = BitData::static_cell_count(); |
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1224 break; |
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1225 case DataLayout::speculative_trap_data_tag: |
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1226 nb_cells = SpeculativeTrapData::static_cell_count(); |
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1227 break; |
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1228 default: |
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1229 fatal(err_msg("unexpected tag %d", dp->tag())); |
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1230 } |
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1231 return (DataLayout*)((address)dp + DataLayout::compute_size_in_bytes(nb_cells)); |
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1232 } |
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1233 |
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1234 ProfileData* MethodData::bci_to_extra_data_helper(int bci, Method* m, DataLayout*& dp, bool concurrent) { |
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1235 DataLayout* end = extra_data_limit(); |
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1236 |
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1237 for (;; dp = next_extra(dp)) { |
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1238 assert(dp < end, "moved past end of extra data"); |
0 | 1239 // No need for "OrderAccess::load_acquire" ops, |
1240 // since the data structure is monotonic. | |
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1241 switch(dp->tag()) { |
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1242 case DataLayout::no_tag: |
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1243 return NULL; |
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1244 case DataLayout::arg_info_data_tag: |
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1245 dp = end; |
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1246 return NULL; // ArgInfoData is at the end of extra data section. |
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1247 case DataLayout::bit_data_tag: |
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1248 if (m == NULL && dp->bci() == bci) { |
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1249 return new BitData(dp); |
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1250 } |
45
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1251 break; |
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1252 case DataLayout::speculative_trap_data_tag: |
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1253 if (m != NULL) { |
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1254 SpeculativeTrapData* data = new SpeculativeTrapData(dp); |
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1255 // data->method() may be null in case of a concurrent |
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1256 // allocation. Maybe it's for the same method. Try to use that |
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1257 // entry in that case. |
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1258 if (dp->bci() == bci) { |
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1259 if (data->method() == NULL) { |
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1260 assert(concurrent, "impossible because no concurrent allocation"); |
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1261 return NULL; |
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1262 } else if (data->method() == m) { |
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|
1263 return data; |
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|
1264 } |
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|
1265 } |
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|
1266 } |
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|
1267 break; |
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|
1268 default: |
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|
1269 fatal(err_msg("unexpected tag %d", dp->tag())); |
0 | 1270 } |
1271 } | |
17728
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|
1272 return NULL; |
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|
1273 } |
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|
1274 |
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|
1275 |
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1276 // Translate a bci to its corresponding extra data, or NULL. |
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1277 ProfileData* MethodData::bci_to_extra_data(int bci, Method* m, bool create_if_missing) { |
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1278 // This code assumes an entry for a SpeculativeTrapData is 2 cells |
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1279 assert(2*DataLayout::compute_size_in_bytes(BitData::static_cell_count()) == |
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1280 DataLayout::compute_size_in_bytes(SpeculativeTrapData::static_cell_count()), |
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1281 "code needs to be adjusted"); |
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1282 |
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1283 DataLayout* dp = extra_data_base(); |
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1284 DataLayout* end = extra_data_limit(); |
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|
1285 |
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1286 // Allocation in the extra data space has to be atomic because not |
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1287 // all entries have the same size and non atomic concurrent |
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1288 // allocation would result in a corrupted extra data space. |
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1289 ProfileData* result = bci_to_extra_data_helper(bci, m, dp, true); |
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1290 if (result != NULL) { |
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1291 return result; |
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1292 } |
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1293 |
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1294 if (create_if_missing && dp < end) { |
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1295 MutexLocker ml(&_extra_data_lock); |
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1296 // Check again now that we have the lock. Another thread may |
1a43981d86ea
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1297 // have added extra data entries. |
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1298 ProfileData* result = bci_to_extra_data_helper(bci, m, dp, false); |
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1299 if (result != NULL || dp >= end) { |
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1300 return result; |
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|
1301 } |
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|
1302 |
17733
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1303 assert(dp->tag() == DataLayout::no_tag || (dp->tag() == DataLayout::speculative_trap_data_tag && m != NULL), "should be free"); |
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1304 assert(next_extra(dp)->tag() == DataLayout::no_tag || next_extra(dp)->tag() == DataLayout::arg_info_data_tag, "should be free or arg info"); |
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1305 u1 tag = m == NULL ? DataLayout::bit_data_tag : DataLayout::speculative_trap_data_tag; |
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1306 // SpeculativeTrapData is 2 slots. Make sure we have room. |
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1307 if (m != NULL && next_extra(dp)->tag() != DataLayout::no_tag) { |
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1308 return NULL; |
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1309 } |
17733
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1310 DataLayout temp; |
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1311 temp.initialize(tag, bci, 0); |
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1312 |
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1313 dp->set_header(temp.header()); |
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1314 assert(dp->tag() == tag, "sane"); |
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1315 assert(dp->bci() == bci, "no concurrent allocation"); |
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1316 if (tag == DataLayout::bit_data_tag) { |
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1317 return new BitData(dp); |
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1318 } else { |
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1319 SpeculativeTrapData* data = new SpeculativeTrapData(dp); |
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1320 data->set_method(m); |
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1321 return data; |
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1322 } |
0 | 1323 } |
1324 return NULL; | |
1325 } | |
1326 | |
6725
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1327 ArgInfoData *MethodData::arg_info() { |
45
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1328 DataLayout* dp = extra_data_base(); |
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1329 DataLayout* end = extra_data_limit(); |
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1330 for (; dp < end; dp = next_extra(dp)) { |
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1331 if (dp->tag() == DataLayout::arg_info_data_tag) |
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1332 return new ArgInfoData(dp); |
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|
1333 } |
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|
1334 return NULL; |
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|
1335 } |
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|
1336 |
6725
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|
1337 // Printing |
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|
1338 |
0 | 1339 #ifndef PRODUCT |
6725
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1340 |
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|
1341 void MethodData::print_on(outputStream* st) const { |
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1342 assert(is_methodData(), "should be method data"); |
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|
1343 st->print("method data for "); |
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|
1344 method()->print_value_on(st); |
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|
1345 st->cr(); |
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|
1346 print_data_on(st); |
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|
1347 } |
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|
1348 |
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1349 #endif //PRODUCT |
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1350 |
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1351 void MethodData::print_value_on(outputStream* st) const { |
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1352 assert(is_methodData(), "should be method data"); |
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|
1353 st->print("method data for "); |
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|
1354 method()->print_value_on(st); |
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|
1355 } |
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|
1356 |
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|
1357 #ifndef PRODUCT |
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|
1358 void MethodData::print_data_on(outputStream* st) const { |
0 | 1359 ResourceMark rm; |
1360 ProfileData* data = first_data(); | |
12962
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8026251: New type profiling points: parameters to methods
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|
1361 if (_parameters_type_data_di != -1) { |
5ccbab1c69f3
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|
1362 parameters_type_data()->print_data_on(st); |
5ccbab1c69f3
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|
1363 } |
0 | 1364 for ( ; is_valid(data); data = next_data(data)) { |
1365 st->print("%d", dp_to_di(data->dp())); | |
1366 st->fill_to(6); | |
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1367 data->print_data_on(st, this); |
0 | 1368 } |
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1369 st->print_cr("--- Extra data:"); |
0 | 1370 DataLayout* dp = extra_data_base(); |
1371 DataLayout* end = extra_data_limit(); | |
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1372 for (;; dp = next_extra(dp)) { |
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1373 assert(dp < end, "moved past end of extra data"); |
0 | 1374 // No need for "OrderAccess::load_acquire" ops, |
1375 // since the data structure is monotonic. | |
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1376 switch(dp->tag()) { |
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1377 case DataLayout::no_tag: |
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|
1378 continue; |
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|
1379 case DataLayout::bit_data_tag: |
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1380 data = new BitData(dp); |
17728
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1381 break; |
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|
1382 case DataLayout::speculative_trap_data_tag: |
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1383 data = new SpeculativeTrapData(dp); |
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|
1384 break; |
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|
1385 case DataLayout::arg_info_data_tag: |
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1386 data = new ArgInfoData(dp); |
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1387 dp = end; // ArgInfoData is at the end of extra data section. |
17728
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|
1388 break; |
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|
1389 default: |
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|
1390 fatal(err_msg("unexpected tag %d", dp->tag())); |
45
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1391 } |
0 | 1392 st->print("%d", dp_to_di(data->dp())); |
1393 st->fill_to(6); | |
1394 data->print_data_on(st); | |
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1395 if (dp >= end) return; |
0 | 1396 } |
1397 } | |
1398 #endif | |
1399 | |
7956 | 1400 #if INCLUDE_SERVICES |
1401 // Size Statistics | |
1402 void MethodData::collect_statistics(KlassSizeStats *sz) const { | |
1403 int n = sz->count(this); | |
1404 sz->_method_data_bytes += n; | |
1405 sz->_method_all_bytes += n; | |
1406 sz->_rw_bytes += n; | |
1407 } | |
1408 #endif // INCLUDE_SERVICES | |
6725
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1409 |
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1410 // Verification |
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1411 |
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1412 void MethodData::verify_on(outputStream* st) { |
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1413 guarantee(is_methodData(), "object must be method data"); |
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1414 // guarantee(m->is_perm(), "should be in permspace"); |
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1415 this->verify_data_on(st); |
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1416 } |
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1417 |
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1418 void MethodData::verify_data_on(outputStream* st) { |
0 | 1419 NEEDS_CLEANUP; |
1420 // not yet implemented. | |
1421 } | |
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1422 |
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1423 bool MethodData::profile_jsr292(methodHandle m, int bci) { |
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1424 if (m->is_compiled_lambda_form()) { |
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|
1425 return true; |
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|
1426 } |
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|
1427 |
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1428 Bytecode_invoke inv(m , bci); |
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1429 return inv.is_invokedynamic() || inv.is_invokehandle(); |
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|
1430 } |
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|
1431 |
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1432 int MethodData::profile_arguments_flag() { |
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1433 return TypeProfileLevel % 10; |
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1434 } |
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|
1435 |
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1436 bool MethodData::profile_arguments() { |
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1437 return profile_arguments_flag() > no_type_profile && profile_arguments_flag() <= type_profile_all; |
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1438 } |
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|
1439 |
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1440 bool MethodData::profile_arguments_jsr292_only() { |
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1441 return profile_arguments_flag() == type_profile_jsr292; |
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|
1442 } |
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|
1443 |
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|
1444 bool MethodData::profile_all_arguments() { |
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1445 return profile_arguments_flag() == type_profile_all; |
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|
1446 } |
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|
1447 |
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1448 bool MethodData::profile_arguments_for_invoke(methodHandle m, int bci) { |
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1449 if (!profile_arguments()) { |
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|
1450 return false; |
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|
1451 } |
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|
1452 |
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|
1453 if (profile_all_arguments()) { |
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|
1454 return true; |
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|
1455 } |
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|
1456 |
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|
1457 assert(profile_arguments_jsr292_only(), "inconsistent"); |
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|
1458 return profile_jsr292(m, bci); |
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|
1459 } |
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|
1460 |
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|
1461 int MethodData::profile_return_flag() { |
12962
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|
1462 return (TypeProfileLevel % 100) / 10; |
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|
1463 } |
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|
1464 |
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|
1465 bool MethodData::profile_return() { |
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|
1466 return profile_return_flag() > no_type_profile && profile_return_flag() <= type_profile_all; |
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|
1467 } |
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|
1468 |
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|
1469 bool MethodData::profile_return_jsr292_only() { |
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1470 return profile_return_flag() == type_profile_jsr292; |
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1471 } |
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|
1472 |
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1473 bool MethodData::profile_all_return() { |
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1474 return profile_return_flag() == type_profile_all; |
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|
1475 } |
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|
1476 |
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|
1477 bool MethodData::profile_return_for_invoke(methodHandle m, int bci) { |
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|
1478 if (!profile_return()) { |
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|
1479 return false; |
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|
1480 } |
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|
1481 |
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|
1482 if (profile_all_return()) { |
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|
1483 return true; |
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|
1484 } |
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|
1485 |
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|
1486 assert(profile_return_jsr292_only(), "inconsistent"); |
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1487 return profile_jsr292(m, bci); |
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|
1488 } |
12962
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|
1489 |
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|
1490 int MethodData::profile_parameters_flag() { |
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|
1491 return TypeProfileLevel / 100; |
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|
1492 } |
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|
1493 |
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|
1494 bool MethodData::profile_parameters() { |
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|
1495 return profile_parameters_flag() > no_type_profile && profile_parameters_flag() <= type_profile_all; |
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|
1496 } |
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|
1497 |
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|
1498 bool MethodData::profile_parameters_jsr292_only() { |
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|
1499 return profile_parameters_flag() == type_profile_jsr292; |
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|
1500 } |
5ccbab1c69f3
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|
1501 |
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|
1502 bool MethodData::profile_all_parameters() { |
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|
1503 return profile_parameters_flag() == type_profile_all; |
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|
1504 } |
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|
1505 |
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|
1506 bool MethodData::profile_parameters_for_method(methodHandle m) { |
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|
1507 if (!profile_parameters()) { |
5ccbab1c69f3
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|
1508 return false; |
5ccbab1c69f3
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|
1509 } |
5ccbab1c69f3
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|
1510 |
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|
1511 if (profile_all_parameters()) { |
5ccbab1c69f3
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|
1512 return true; |
5ccbab1c69f3
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|
1513 } |
5ccbab1c69f3
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|
1514 |
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|
1515 assert(profile_parameters_jsr292_only(), "inconsistent"); |
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|
1516 return m->is_compiled_lambda_form(); |
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|
1517 } |
17728
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|
1518 |
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1519 void MethodData::clean_extra_data_helper(DataLayout* dp, int shift, bool reset) { |
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|
1520 if (shift == 0) { |
b8413a9cbb84
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|
1521 return; |
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|
1522 } |
b8413a9cbb84
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|
1523 if (!reset) { |
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|
1524 // Move all cells of trap entry at dp left by "shift" cells |
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1525 intptr_t* start = (intptr_t*)dp; |
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1526 intptr_t* end = (intptr_t*)next_extra(dp); |
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1527 for (intptr_t* ptr = start; ptr < end; ptr++) { |
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1528 *(ptr-shift) = *ptr; |
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|
1529 } |
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|
1530 } else { |
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|
1531 // Reset "shift" cells stopping at dp |
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|
1532 intptr_t* start = ((intptr_t*)dp) - shift; |
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1533 intptr_t* end = (intptr_t*)dp; |
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|
1534 for (intptr_t* ptr = start; ptr < end; ptr++) { |
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|
1535 *ptr = 0; |
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|
1536 } |
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|
1537 } |
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|
1538 } |
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|
1539 |
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1540 // Remove SpeculativeTrapData entries that reference an unloaded |
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1541 // method |
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1542 void MethodData::clean_extra_data(BoolObjectClosure* is_alive) { |
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1543 DataLayout* dp = extra_data_base(); |
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1544 DataLayout* end = extra_data_limit(); |
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1545 |
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1546 int shift = 0; |
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1547 for (; dp < end; dp = next_extra(dp)) { |
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1548 switch(dp->tag()) { |
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1549 case DataLayout::speculative_trap_data_tag: { |
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1550 SpeculativeTrapData* data = new SpeculativeTrapData(dp); |
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1551 Method* m = data->method(); |
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1552 assert(m != NULL, "should have a method"); |
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1553 if (!m->method_holder()->is_loader_alive(is_alive)) { |
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1554 // "shift" accumulates the number of cells for dead |
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1555 // SpeculativeTrapData entries that have been seen so |
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1556 // far. Following entries must be shifted left by that many |
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1557 // cells to remove the dead SpeculativeTrapData entries. |
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1558 shift += (int)((intptr_t*)next_extra(dp) - (intptr_t*)dp); |
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1559 } else { |
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1560 // Shift this entry left if it follows dead |
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1561 // SpeculativeTrapData entries |
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1562 clean_extra_data_helper(dp, shift); |
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1563 } |
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1564 break; |
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1565 } |
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1566 case DataLayout::bit_data_tag: |
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1567 // Shift this entry left if it follows dead SpeculativeTrapData |
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1568 // entries |
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1569 clean_extra_data_helper(dp, shift); |
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1570 continue; |
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1571 case DataLayout::no_tag: |
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1572 case DataLayout::arg_info_data_tag: |
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1573 // We are at end of the live trap entries. The previous "shift" |
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1574 // cells contain entries that are either dead or were shifted |
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1575 // left. They need to be reset to no_tag |
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1576 clean_extra_data_helper(dp, shift, true); |
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1577 return; |
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1578 default: |
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1579 fatal(err_msg("unexpected tag %d", dp->tag())); |
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1580 } |
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1581 } |
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1582 } |
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1583 |
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1584 // Verify there's no unloaded method referenced by a |
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1585 // SpeculativeTrapData entry |
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1586 void MethodData::verify_extra_data_clean(BoolObjectClosure* is_alive) { |
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1587 #ifdef ASSERT |
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1588 DataLayout* dp = extra_data_base(); |
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1589 DataLayout* end = extra_data_limit(); |
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1590 |
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1591 for (; dp < end; dp = next_extra(dp)) { |
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1592 switch(dp->tag()) { |
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1593 case DataLayout::speculative_trap_data_tag: { |
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1594 SpeculativeTrapData* data = new SpeculativeTrapData(dp); |
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1595 Method* m = data->method(); |
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1596 assert(m != NULL && m->method_holder()->is_loader_alive(is_alive), "Method should exist"); |
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1597 break; |
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1598 } |
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1599 case DataLayout::bit_data_tag: |
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1600 continue; |
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1601 case DataLayout::no_tag: |
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1602 case DataLayout::arg_info_data_tag: |
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1603 return; |
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1604 default: |
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1605 fatal(err_msg("unexpected tag %d", dp->tag())); |
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1606 } |
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1607 } |
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1608 #endif |
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1609 } |
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1610 |
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1611 void MethodData::clean_method_data(BoolObjectClosure* is_alive) { |
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1612 for (ProfileData* data = first_data(); |
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1613 is_valid(data); |
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1614 data = next_data(data)) { |
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1615 data->clean_weak_klass_links(is_alive); |
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1616 } |
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1617 ParametersTypeData* parameters = parameters_type_data(); |
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1618 if (parameters != NULL) { |
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1619 parameters->clean_weak_klass_links(is_alive); |
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1620 } |
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1621 |
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1622 clean_extra_data(is_alive); |
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1623 verify_extra_data_clean(is_alive); |
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1624 } |