Mercurial > hg > graal-compiler
annotate src/share/vm/runtime/sharedRuntime.cpp @ 4712:e7dead7e90af
7117303: VM uses non-monotonic time source and complains that it is non-monotonic
Summary: Replaces calls to os::javaTimeMillis(), which does not (and cannot) guarantee monotonicity, in GC code to an equivalent expression that uses os::javaTimeNanos(). os::javaTimeNanos is guaranteed monotonically non-decreasing if the underlying platform provides a monotonic time source. Changes in OS files are to make use of the newly defined constants in globalDefinitions.hpp.
Reviewed-by: dholmes, ysr
author | johnc |
---|---|
date | Mon, 19 Dec 2011 10:02:05 -0800 |
parents | 2ec638646e86 |
children | 04b9a2566eec 15d394228cfa |
rev | line source |
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0 | 1 /* |
2142 | 2 * Copyright (c) 1997, 2011, 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 * | |
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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 "classfile/vmSymbols.hpp" | |
28 #include "code/compiledIC.hpp" | |
29 #include "code/scopeDesc.hpp" | |
30 #include "code/vtableStubs.hpp" | |
31 #include "compiler/abstractCompiler.hpp" | |
32 #include "compiler/compileBroker.hpp" | |
33 #include "compiler/compilerOracle.hpp" | |
34 #include "interpreter/interpreter.hpp" | |
35 #include "interpreter/interpreterRuntime.hpp" | |
36 #include "memory/gcLocker.inline.hpp" | |
37 #include "memory/universe.inline.hpp" | |
38 #include "oops/oop.inline.hpp" | |
39 #include "prims/forte.hpp" | |
40 #include "prims/jvmtiExport.hpp" | |
41 #include "prims/jvmtiRedefineClassesTrace.hpp" | |
42 #include "prims/methodHandles.hpp" | |
43 #include "prims/nativeLookup.hpp" | |
44 #include "runtime/arguments.hpp" | |
45 #include "runtime/biasedLocking.hpp" | |
46 #include "runtime/handles.inline.hpp" | |
47 #include "runtime/init.hpp" | |
48 #include "runtime/interfaceSupport.hpp" | |
49 #include "runtime/javaCalls.hpp" | |
50 #include "runtime/sharedRuntime.hpp" | |
51 #include "runtime/stubRoutines.hpp" | |
52 #include "runtime/vframe.hpp" | |
53 #include "runtime/vframeArray.hpp" | |
54 #include "utilities/copy.hpp" | |
55 #include "utilities/dtrace.hpp" | |
56 #include "utilities/events.hpp" | |
57 #include "utilities/hashtable.inline.hpp" | |
58 #include "utilities/xmlstream.hpp" | |
59 #ifdef TARGET_ARCH_x86 | |
60 # include "nativeInst_x86.hpp" | |
61 # include "vmreg_x86.inline.hpp" | |
62 #endif | |
63 #ifdef TARGET_ARCH_sparc | |
64 # include "nativeInst_sparc.hpp" | |
65 # include "vmreg_sparc.inline.hpp" | |
66 #endif | |
67 #ifdef TARGET_ARCH_zero | |
68 # include "nativeInst_zero.hpp" | |
69 # include "vmreg_zero.inline.hpp" | |
70 #endif | |
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71 #ifdef TARGET_ARCH_arm |
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72 # include "nativeInst_arm.hpp" |
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73 # include "vmreg_arm.inline.hpp" |
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74 #endif |
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75 #ifdef TARGET_ARCH_ppc |
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76 # include "nativeInst_ppc.hpp" |
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77 # include "vmreg_ppc.inline.hpp" |
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78 #endif |
1972 | 79 #ifdef COMPILER1 |
80 #include "c1/c1_Runtime1.hpp" | |
81 #endif | |
82 | |
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83 // Shared stub locations |
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84 RuntimeStub* SharedRuntime::_wrong_method_blob; |
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85 RuntimeStub* SharedRuntime::_ic_miss_blob; |
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86 RuntimeStub* SharedRuntime::_resolve_opt_virtual_call_blob; |
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87 RuntimeStub* SharedRuntime::_resolve_virtual_call_blob; |
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88 RuntimeStub* SharedRuntime::_resolve_static_call_blob; |
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89 |
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90 DeoptimizationBlob* SharedRuntime::_deopt_blob; |
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91 RicochetBlob* SharedRuntime::_ricochet_blob; |
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92 |
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93 SafepointBlob* SharedRuntime::_polling_page_safepoint_handler_blob; |
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94 SafepointBlob* SharedRuntime::_polling_page_return_handler_blob; |
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95 |
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96 #ifdef COMPILER2 |
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97 UncommonTrapBlob* SharedRuntime::_uncommon_trap_blob; |
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98 #endif // COMPILER2 |
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99 |
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100 |
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101 //----------------------------generate_stubs----------------------------------- |
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102 void SharedRuntime::generate_stubs() { |
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103 _wrong_method_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::handle_wrong_method), "wrong_method_stub"); |
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104 _ic_miss_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::handle_wrong_method_ic_miss), "ic_miss_stub"); |
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105 _resolve_opt_virtual_call_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::resolve_opt_virtual_call_C), "resolve_opt_virtual_call"); |
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106 _resolve_virtual_call_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::resolve_virtual_call_C), "resolve_virtual_call"); |
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107 _resolve_static_call_blob = generate_resolve_blob(CAST_FROM_FN_PTR(address, SharedRuntime::resolve_static_call_C), "resolve_static_call"); |
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108 |
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109 _polling_page_safepoint_handler_blob = generate_handler_blob(CAST_FROM_FN_PTR(address, SafepointSynchronize::handle_polling_page_exception), false); |
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110 _polling_page_return_handler_blob = generate_handler_blob(CAST_FROM_FN_PTR(address, SafepointSynchronize::handle_polling_page_exception), true); |
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111 |
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112 generate_ricochet_blob(); |
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113 generate_deopt_blob(); |
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114 |
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115 #ifdef COMPILER2 |
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116 generate_uncommon_trap_blob(); |
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117 #endif // COMPILER2 |
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118 } |
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119 |
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120 //----------------------------generate_ricochet_blob--------------------------- |
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121 void SharedRuntime::generate_ricochet_blob() { |
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122 if (!EnableInvokeDynamic) return; // leave it as a null |
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123 |
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124 #ifndef TARGET_ARCH_NYI_6939861 |
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125 // allocate space for the code |
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126 ResourceMark rm; |
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127 // setup code generation tools |
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128 CodeBuffer buffer("ricochet_blob", 256 LP64_ONLY(+ 256), 256); // XXX x86 LP64L: 512, 512 |
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129 MacroAssembler* masm = new MacroAssembler(&buffer); |
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130 |
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131 int bounce_offset = -1, exception_offset = -1, frame_size_in_words = -1; |
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132 MethodHandles::RicochetFrame::generate_ricochet_blob(masm, &bounce_offset, &exception_offset, &frame_size_in_words); |
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133 |
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134 // ------------- |
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135 // make sure all code is generated |
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136 masm->flush(); |
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137 |
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138 // failed to generate? |
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139 if (bounce_offset < 0 || exception_offset < 0 || frame_size_in_words < 0) { |
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140 assert(false, "bad ricochet blob"); |
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141 return; |
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142 } |
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143 |
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144 _ricochet_blob = RicochetBlob::create(&buffer, bounce_offset, exception_offset, frame_size_in_words); |
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145 #endif |
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146 } |
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147 |
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148 |
0 | 149 #include <math.h> |
150 | |
4006 | 151 #ifndef USDT2 |
0 | 152 HS_DTRACE_PROBE_DECL4(hotspot, object__alloc, Thread*, char*, int, size_t); |
153 HS_DTRACE_PROBE_DECL7(hotspot, method__entry, int, | |
154 char*, int, char*, int, char*, int); | |
155 HS_DTRACE_PROBE_DECL7(hotspot, method__return, int, | |
156 char*, int, char*, int, char*, int); | |
4006 | 157 #endif /* !USDT2 */ |
0 | 158 |
159 // Implementation of SharedRuntime | |
160 | |
161 #ifndef PRODUCT | |
162 // For statistics | |
163 int SharedRuntime::_ic_miss_ctr = 0; | |
164 int SharedRuntime::_wrong_method_ctr = 0; | |
165 int SharedRuntime::_resolve_static_ctr = 0; | |
166 int SharedRuntime::_resolve_virtual_ctr = 0; | |
167 int SharedRuntime::_resolve_opt_virtual_ctr = 0; | |
168 int SharedRuntime::_implicit_null_throws = 0; | |
169 int SharedRuntime::_implicit_div0_throws = 0; | |
170 int SharedRuntime::_throw_null_ctr = 0; | |
171 | |
172 int SharedRuntime::_nof_normal_calls = 0; | |
173 int SharedRuntime::_nof_optimized_calls = 0; | |
174 int SharedRuntime::_nof_inlined_calls = 0; | |
175 int SharedRuntime::_nof_megamorphic_calls = 0; | |
176 int SharedRuntime::_nof_static_calls = 0; | |
177 int SharedRuntime::_nof_inlined_static_calls = 0; | |
178 int SharedRuntime::_nof_interface_calls = 0; | |
179 int SharedRuntime::_nof_optimized_interface_calls = 0; | |
180 int SharedRuntime::_nof_inlined_interface_calls = 0; | |
181 int SharedRuntime::_nof_megamorphic_interface_calls = 0; | |
182 int SharedRuntime::_nof_removable_exceptions = 0; | |
183 | |
184 int SharedRuntime::_new_instance_ctr=0; | |
185 int SharedRuntime::_new_array_ctr=0; | |
186 int SharedRuntime::_multi1_ctr=0; | |
187 int SharedRuntime::_multi2_ctr=0; | |
188 int SharedRuntime::_multi3_ctr=0; | |
189 int SharedRuntime::_multi4_ctr=0; | |
190 int SharedRuntime::_multi5_ctr=0; | |
191 int SharedRuntime::_mon_enter_stub_ctr=0; | |
192 int SharedRuntime::_mon_exit_stub_ctr=0; | |
193 int SharedRuntime::_mon_enter_ctr=0; | |
194 int SharedRuntime::_mon_exit_ctr=0; | |
195 int SharedRuntime::_partial_subtype_ctr=0; | |
196 int SharedRuntime::_jbyte_array_copy_ctr=0; | |
197 int SharedRuntime::_jshort_array_copy_ctr=0; | |
198 int SharedRuntime::_jint_array_copy_ctr=0; | |
199 int SharedRuntime::_jlong_array_copy_ctr=0; | |
200 int SharedRuntime::_oop_array_copy_ctr=0; | |
201 int SharedRuntime::_checkcast_array_copy_ctr=0; | |
202 int SharedRuntime::_unsafe_array_copy_ctr=0; | |
203 int SharedRuntime::_generic_array_copy_ctr=0; | |
204 int SharedRuntime::_slow_array_copy_ctr=0; | |
205 int SharedRuntime::_find_handler_ctr=0; | |
206 int SharedRuntime::_rethrow_ctr=0; | |
207 | |
208 int SharedRuntime::_ICmiss_index = 0; | |
209 int SharedRuntime::_ICmiss_count[SharedRuntime::maxICmiss_count]; | |
210 address SharedRuntime::_ICmiss_at[SharedRuntime::maxICmiss_count]; | |
211 | |
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212 |
0 | 213 void SharedRuntime::trace_ic_miss(address at) { |
214 for (int i = 0; i < _ICmiss_index; i++) { | |
215 if (_ICmiss_at[i] == at) { | |
216 _ICmiss_count[i]++; | |
217 return; | |
218 } | |
219 } | |
220 int index = _ICmiss_index++; | |
221 if (_ICmiss_index >= maxICmiss_count) _ICmiss_index = maxICmiss_count - 1; | |
222 _ICmiss_at[index] = at; | |
223 _ICmiss_count[index] = 1; | |
224 } | |
225 | |
226 void SharedRuntime::print_ic_miss_histogram() { | |
227 if (ICMissHistogram) { | |
228 tty->print_cr ("IC Miss Histogram:"); | |
229 int tot_misses = 0; | |
230 for (int i = 0; i < _ICmiss_index; i++) { | |
231 tty->print_cr(" at: " INTPTR_FORMAT " nof: %d", _ICmiss_at[i], _ICmiss_count[i]); | |
232 tot_misses += _ICmiss_count[i]; | |
233 } | |
234 tty->print_cr ("Total IC misses: %7d", tot_misses); | |
235 } | |
236 } | |
237 #endif // PRODUCT | |
238 | |
342
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239 #ifndef SERIALGC |
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240 |
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241 // G1 write-barrier pre: executed before a pointer store. |
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242 JRT_LEAF(void, SharedRuntime::g1_wb_pre(oopDesc* orig, JavaThread *thread)) |
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243 if (orig == NULL) { |
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244 assert(false, "should be optimized out"); |
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245 return; |
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246 } |
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247 assert(orig->is_oop(true /* ignore mark word */), "Error"); |
342
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248 // store the original value that was in the field reference |
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249 thread->satb_mark_queue().enqueue(orig); |
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250 JRT_END |
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251 |
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252 // G1 write-barrier post: executed after a pointer store. |
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253 JRT_LEAF(void, SharedRuntime::g1_wb_post(void* card_addr, JavaThread* thread)) |
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254 thread->dirty_card_queue().enqueue(card_addr); |
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255 JRT_END |
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256 |
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257 #endif // !SERIALGC |
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258 |
0 | 259 |
260 JRT_LEAF(jlong, SharedRuntime::lmul(jlong y, jlong x)) | |
261 return x * y; | |
262 JRT_END | |
263 | |
264 | |
265 JRT_LEAF(jlong, SharedRuntime::ldiv(jlong y, jlong x)) | |
266 if (x == min_jlong && y == CONST64(-1)) { | |
267 return x; | |
268 } else { | |
269 return x / y; | |
270 } | |
271 JRT_END | |
272 | |
273 | |
274 JRT_LEAF(jlong, SharedRuntime::lrem(jlong y, jlong x)) | |
275 if (x == min_jlong && y == CONST64(-1)) { | |
276 return 0; | |
277 } else { | |
278 return x % y; | |
279 } | |
280 JRT_END | |
281 | |
282 | |
283 const juint float_sign_mask = 0x7FFFFFFF; | |
284 const juint float_infinity = 0x7F800000; | |
285 const julong double_sign_mask = CONST64(0x7FFFFFFFFFFFFFFF); | |
286 const julong double_infinity = CONST64(0x7FF0000000000000); | |
287 | |
288 JRT_LEAF(jfloat, SharedRuntime::frem(jfloat x, jfloat y)) | |
289 #ifdef _WIN64 | |
290 // 64-bit Windows on amd64 returns the wrong values for | |
291 // infinity operands. | |
292 union { jfloat f; juint i; } xbits, ybits; | |
293 xbits.f = x; | |
294 ybits.f = y; | |
295 // x Mod Infinity == x unless x is infinity | |
296 if ( ((xbits.i & float_sign_mask) != float_infinity) && | |
297 ((ybits.i & float_sign_mask) == float_infinity) ) { | |
298 return x; | |
299 } | |
300 #endif | |
301 return ((jfloat)fmod((double)x,(double)y)); | |
302 JRT_END | |
303 | |
304 | |
305 JRT_LEAF(jdouble, SharedRuntime::drem(jdouble x, jdouble y)) | |
306 #ifdef _WIN64 | |
307 union { jdouble d; julong l; } xbits, ybits; | |
308 xbits.d = x; | |
309 ybits.d = y; | |
310 // x Mod Infinity == x unless x is infinity | |
311 if ( ((xbits.l & double_sign_mask) != double_infinity) && | |
312 ((ybits.l & double_sign_mask) == double_infinity) ) { | |
313 return x; | |
314 } | |
315 #endif | |
316 return ((jdouble)fmod((double)x,(double)y)); | |
317 JRT_END | |
318 | |
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319 #ifdef __SOFTFP__ |
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320 JRT_LEAF(jfloat, SharedRuntime::fadd(jfloat x, jfloat y)) |
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321 return x + y; |
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322 JRT_END |
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323 |
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324 JRT_LEAF(jfloat, SharedRuntime::fsub(jfloat x, jfloat y)) |
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325 return x - y; |
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326 JRT_END |
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327 |
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328 JRT_LEAF(jfloat, SharedRuntime::fmul(jfloat x, jfloat y)) |
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329 return x * y; |
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330 JRT_END |
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331 |
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332 JRT_LEAF(jfloat, SharedRuntime::fdiv(jfloat x, jfloat y)) |
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333 return x / y; |
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334 JRT_END |
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335 |
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336 JRT_LEAF(jdouble, SharedRuntime::dadd(jdouble x, jdouble y)) |
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337 return x + y; |
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338 JRT_END |
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339 |
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340 JRT_LEAF(jdouble, SharedRuntime::dsub(jdouble x, jdouble y)) |
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341 return x - y; |
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342 JRT_END |
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343 |
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344 JRT_LEAF(jdouble, SharedRuntime::dmul(jdouble x, jdouble y)) |
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345 return x * y; |
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346 JRT_END |
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347 |
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348 JRT_LEAF(jdouble, SharedRuntime::ddiv(jdouble x, jdouble y)) |
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349 return x / y; |
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350 JRT_END |
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351 |
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352 JRT_LEAF(jfloat, SharedRuntime::i2f(jint x)) |
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353 return (jfloat)x; |
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354 JRT_END |
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355 |
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356 JRT_LEAF(jdouble, SharedRuntime::i2d(jint x)) |
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357 return (jdouble)x; |
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358 JRT_END |
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359 |
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360 JRT_LEAF(jdouble, SharedRuntime::f2d(jfloat x)) |
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361 return (jdouble)x; |
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362 JRT_END |
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363 |
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364 JRT_LEAF(int, SharedRuntime::fcmpl(float x, float y)) |
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365 return x>y ? 1 : (x==y ? 0 : -1); /* x<y or is_nan*/ |
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366 JRT_END |
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367 |
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368 JRT_LEAF(int, SharedRuntime::fcmpg(float x, float y)) |
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369 return x<y ? -1 : (x==y ? 0 : 1); /* x>y or is_nan */ |
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370 JRT_END |
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371 |
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372 JRT_LEAF(int, SharedRuntime::dcmpl(double x, double y)) |
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373 return x>y ? 1 : (x==y ? 0 : -1); /* x<y or is_nan */ |
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374 JRT_END |
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375 |
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376 JRT_LEAF(int, SharedRuntime::dcmpg(double x, double y)) |
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377 return x<y ? -1 : (x==y ? 0 : 1); /* x>y or is_nan */ |
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378 JRT_END |
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379 |
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380 // Functions to return the opposite of the aeabi functions for nan. |
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381 JRT_LEAF(int, SharedRuntime::unordered_fcmplt(float x, float y)) |
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382 return (x < y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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383 JRT_END |
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384 |
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385 JRT_LEAF(int, SharedRuntime::unordered_dcmplt(double x, double y)) |
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386 return (x < y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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387 JRT_END |
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388 |
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389 JRT_LEAF(int, SharedRuntime::unordered_fcmple(float x, float y)) |
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390 return (x <= y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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391 JRT_END |
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392 |
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393 JRT_LEAF(int, SharedRuntime::unordered_dcmple(double x, double y)) |
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394 return (x <= y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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395 JRT_END |
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396 |
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397 JRT_LEAF(int, SharedRuntime::unordered_fcmpge(float x, float y)) |
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398 return (x >= y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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399 JRT_END |
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400 |
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401 JRT_LEAF(int, SharedRuntime::unordered_dcmpge(double x, double y)) |
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402 return (x >= y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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403 JRT_END |
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404 |
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405 JRT_LEAF(int, SharedRuntime::unordered_fcmpgt(float x, float y)) |
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406 return (x > y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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407 JRT_END |
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408 |
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409 JRT_LEAF(int, SharedRuntime::unordered_dcmpgt(double x, double y)) |
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410 return (x > y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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411 JRT_END |
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412 |
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413 // Intrinsics make gcc generate code for these. |
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414 float SharedRuntime::fneg(float f) { |
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415 return -f; |
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416 } |
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417 |
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418 double SharedRuntime::dneg(double f) { |
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419 return -f; |
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420 } |
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421 |
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422 #endif // __SOFTFP__ |
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423 |
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424 #if defined(__SOFTFP__) || defined(E500V2) |
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425 // Intrinsics make gcc generate code for these. |
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426 double SharedRuntime::dabs(double f) { |
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427 return (f <= (double)0.0) ? (double)0.0 - f : f; |
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428 } |
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429 |
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430 #endif |
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431 |
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432 #if defined(__SOFTFP__) || defined(PPC) |
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433 double SharedRuntime::dsqrt(double f) { |
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434 return sqrt(f); |
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435 } |
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436 #endif |
0 | 437 |
438 JRT_LEAF(jint, SharedRuntime::f2i(jfloat x)) | |
508
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439 if (g_isnan(x)) |
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440 return 0; |
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441 if (x >= (jfloat) max_jint) |
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442 return max_jint; |
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443 if (x <= (jfloat) min_jint) |
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444 return min_jint; |
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445 return (jint) x; |
0 | 446 JRT_END |
447 | |
448 | |
449 JRT_LEAF(jlong, SharedRuntime::f2l(jfloat x)) | |
508
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450 if (g_isnan(x)) |
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451 return 0; |
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452 if (x >= (jfloat) max_jlong) |
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453 return max_jlong; |
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454 if (x <= (jfloat) min_jlong) |
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455 return min_jlong; |
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456 return (jlong) x; |
0 | 457 JRT_END |
458 | |
459 | |
460 JRT_LEAF(jint, SharedRuntime::d2i(jdouble x)) | |
508
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461 if (g_isnan(x)) |
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462 return 0; |
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463 if (x >= (jdouble) max_jint) |
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464 return max_jint; |
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465 if (x <= (jdouble) min_jint) |
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466 return min_jint; |
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467 return (jint) x; |
0 | 468 JRT_END |
469 | |
470 | |
471 JRT_LEAF(jlong, SharedRuntime::d2l(jdouble x)) | |
508
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472 if (g_isnan(x)) |
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473 return 0; |
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474 if (x >= (jdouble) max_jlong) |
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475 return max_jlong; |
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476 if (x <= (jdouble) min_jlong) |
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477 return min_jlong; |
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478 return (jlong) x; |
0 | 479 JRT_END |
480 | |
481 | |
482 JRT_LEAF(jfloat, SharedRuntime::d2f(jdouble x)) | |
483 return (jfloat)x; | |
484 JRT_END | |
485 | |
486 | |
487 JRT_LEAF(jfloat, SharedRuntime::l2f(jlong x)) | |
488 return (jfloat)x; | |
489 JRT_END | |
490 | |
491 | |
492 JRT_LEAF(jdouble, SharedRuntime::l2d(jlong x)) | |
493 return (jdouble)x; | |
494 JRT_END | |
495 | |
496 // Exception handling accross interpreter/compiler boundaries | |
497 // | |
498 // exception_handler_for_return_address(...) returns the continuation address. | |
499 // The continuation address is the entry point of the exception handler of the | |
500 // previous frame depending on the return address. | |
501 | |
1295 | 502 address SharedRuntime::raw_exception_handler_for_return_address(JavaThread* thread, address return_address) { |
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503 assert(frame::verify_return_pc(return_address), err_msg("must be a return address: " INTPTR_FORMAT, return_address)); |
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504 |
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505 // Reset method handle flag. |
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506 thread->set_is_method_handle_return(false); |
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507 |
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508 // The fastest case first |
0 | 509 CodeBlob* blob = CodeCache::find_blob(return_address); |
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510 nmethod* nm = (blob != NULL) ? blob->as_nmethod_or_null() : NULL; |
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511 if (nm != NULL) { |
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512 // Set flag if return address is a method handle call site. |
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513 thread->set_is_method_handle_return(nm->is_method_handle_return(return_address)); |
0 | 514 // native nmethods don't have exception handlers |
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515 assert(!nm->is_native_method(), "no exception handler"); |
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516 assert(nm->header_begin() != nm->exception_begin(), "no exception handler"); |
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517 if (nm->is_deopt_pc(return_address)) { |
0 | 518 return SharedRuntime::deopt_blob()->unpack_with_exception(); |
519 } else { | |
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520 return nm->exception_begin(); |
0 | 521 } |
522 } | |
523 | |
524 // Entry code | |
525 if (StubRoutines::returns_to_call_stub(return_address)) { | |
526 return StubRoutines::catch_exception_entry(); | |
527 } | |
528 // Interpreted code | |
529 if (Interpreter::contains(return_address)) { | |
530 return Interpreter::rethrow_exception_entry(); | |
531 } | |
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532 // Ricochet frame unwind code |
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533 if (SharedRuntime::ricochet_blob() != NULL && SharedRuntime::ricochet_blob()->returns_to_bounce_addr(return_address)) { |
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534 return SharedRuntime::ricochet_blob()->exception_addr(); |
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535 } |
0 | 536 |
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537 guarantee(blob == NULL || !blob->is_runtime_stub(), "caller should have skipped stub"); |
0 | 538 guarantee(!VtableStubs::contains(return_address), "NULL exceptions in vtables should have been handled already!"); |
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539 |
0 | 540 #ifndef PRODUCT |
541 { ResourceMark rm; | |
542 tty->print_cr("No exception handler found for exception at " INTPTR_FORMAT " - potential problems:", return_address); | |
543 tty->print_cr("a) exception happened in (new?) code stubs/buffers that is not handled here"); | |
544 tty->print_cr("b) other problem"); | |
545 } | |
546 #endif // PRODUCT | |
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547 |
0 | 548 ShouldNotReachHere(); |
549 return NULL; | |
550 } | |
551 | |
552 | |
1295 | 553 JRT_LEAF(address, SharedRuntime::exception_handler_for_return_address(JavaThread* thread, address return_address)) |
554 return raw_exception_handler_for_return_address(thread, return_address); | |
0 | 555 JRT_END |
556 | |
1295 | 557 |
0 | 558 address SharedRuntime::get_poll_stub(address pc) { |
559 address stub; | |
560 // Look up the code blob | |
561 CodeBlob *cb = CodeCache::find_blob(pc); | |
562 | |
563 // Should be an nmethod | |
564 assert( cb && cb->is_nmethod(), "safepoint polling: pc must refer to an nmethod" ); | |
565 | |
566 // Look up the relocation information | |
567 assert( ((nmethod*)cb)->is_at_poll_or_poll_return(pc), | |
568 "safepoint polling: type must be poll" ); | |
569 | |
570 assert( ((NativeInstruction*)pc)->is_safepoint_poll(), | |
571 "Only polling locations are used for safepoint"); | |
572 | |
573 bool at_poll_return = ((nmethod*)cb)->is_at_poll_return(pc); | |
574 if (at_poll_return) { | |
575 assert(SharedRuntime::polling_page_return_handler_blob() != NULL, | |
576 "polling page return stub not created yet"); | |
1748 | 577 stub = SharedRuntime::polling_page_return_handler_blob()->entry_point(); |
0 | 578 } else { |
579 assert(SharedRuntime::polling_page_safepoint_handler_blob() != NULL, | |
580 "polling page safepoint stub not created yet"); | |
1748 | 581 stub = SharedRuntime::polling_page_safepoint_handler_blob()->entry_point(); |
0 | 582 } |
583 #ifndef PRODUCT | |
584 if( TraceSafepoint ) { | |
585 char buf[256]; | |
586 jio_snprintf(buf, sizeof(buf), | |
587 "... found polling page %s exception at pc = " | |
588 INTPTR_FORMAT ", stub =" INTPTR_FORMAT, | |
589 at_poll_return ? "return" : "loop", | |
590 (intptr_t)pc, (intptr_t)stub); | |
591 tty->print_raw_cr(buf); | |
592 } | |
593 #endif // PRODUCT | |
594 return stub; | |
595 } | |
596 | |
597 | |
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598 oop SharedRuntime::retrieve_receiver( Symbol* sig, frame caller ) { |
0 | 599 assert(caller.is_interpreted_frame(), ""); |
600 int args_size = ArgumentSizeComputer(sig).size() + 1; | |
601 assert(args_size <= caller.interpreter_frame_expression_stack_size(), "receiver must be on interpreter stack"); | |
602 oop result = (oop) *caller.interpreter_frame_tos_at(args_size - 1); | |
603 assert(Universe::heap()->is_in(result) && result->is_oop(), "receiver must be an oop"); | |
604 return result; | |
605 } | |
606 | |
607 | |
608 void SharedRuntime::throw_and_post_jvmti_exception(JavaThread *thread, Handle h_exception) { | |
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609 if (JvmtiExport::can_post_on_exceptions()) { |
0 | 610 vframeStream vfst(thread, true); |
611 methodHandle method = methodHandle(thread, vfst.method()); | |
612 address bcp = method()->bcp_from(vfst.bci()); | |
613 JvmtiExport::post_exception_throw(thread, method(), bcp, h_exception()); | |
614 } | |
615 Exceptions::_throw(thread, __FILE__, __LINE__, h_exception); | |
616 } | |
617 | |
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618 void SharedRuntime::throw_and_post_jvmti_exception(JavaThread *thread, Symbol* name, const char *message) { |
0 | 619 Handle h_exception = Exceptions::new_exception(thread, name, message); |
620 throw_and_post_jvmti_exception(thread, h_exception); | |
621 } | |
622 | |
610
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623 // The interpreter code to call this tracing function is only |
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624 // called/generated when TraceRedefineClasses has the right bits |
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625 // set. Since obsolete methods are never compiled, we don't have |
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626 // to modify the compilers to generate calls to this function. |
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627 // |
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628 JRT_LEAF(int, SharedRuntime::rc_trace_method_entry( |
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629 JavaThread* thread, methodOopDesc* method)) |
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630 assert(RC_TRACE_IN_RANGE(0x00001000, 0x00002000), "wrong call"); |
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631 |
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632 if (method->is_obsolete()) { |
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633 // We are calling an obsolete method, but this is not necessarily |
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634 // an error. Our method could have been redefined just after we |
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635 // fetched the methodOop from the constant pool. |
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636 |
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637 // RC_TRACE macro has an embedded ResourceMark |
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638 RC_TRACE_WITH_THREAD(0x00001000, thread, |
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639 ("calling obsolete method '%s'", |
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640 method->name_and_sig_as_C_string())); |
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641 if (RC_TRACE_ENABLED(0x00002000)) { |
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642 // this option is provided to debug calls to obsolete methods |
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643 guarantee(false, "faulting at call to an obsolete method."); |
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644 } |
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645 } |
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646 return 0; |
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647 JRT_END |
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648 |
0 | 649 // ret_pc points into caller; we are returning caller's exception handler |
650 // for given exception | |
651 address SharedRuntime::compute_compiled_exc_handler(nmethod* nm, address ret_pc, Handle& exception, | |
652 bool force_unwind, bool top_frame_only) { | |
653 assert(nm != NULL, "must exist"); | |
654 ResourceMark rm; | |
655 | |
656 ScopeDesc* sd = nm->scope_desc_at(ret_pc); | |
657 // determine handler bci, if any | |
658 EXCEPTION_MARK; | |
659 | |
660 int handler_bci = -1; | |
661 int scope_depth = 0; | |
662 if (!force_unwind) { | |
663 int bci = sd->bci(); | |
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664 bool recursive_exception = false; |
0 | 665 do { |
666 bool skip_scope_increment = false; | |
667 // exception handler lookup | |
668 KlassHandle ek (THREAD, exception->klass()); | |
669 handler_bci = sd->method()->fast_exception_handler_bci_for(ek, bci, THREAD); | |
670 if (HAS_PENDING_EXCEPTION) { | |
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671 recursive_exception = true; |
0 | 672 // We threw an exception while trying to find the exception handler. |
673 // Transfer the new exception to the exception handle which will | |
674 // be set into thread local storage, and do another lookup for an | |
675 // exception handler for this exception, this time starting at the | |
676 // BCI of the exception handler which caused the exception to be | |
677 // thrown (bugs 4307310 and 4546590). Set "exception" reference | |
678 // argument to ensure that the correct exception is thrown (4870175). | |
679 exception = Handle(THREAD, PENDING_EXCEPTION); | |
680 CLEAR_PENDING_EXCEPTION; | |
681 if (handler_bci >= 0) { | |
682 bci = handler_bci; | |
683 handler_bci = -1; | |
684 skip_scope_increment = true; | |
685 } | |
686 } | |
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687 else { |
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688 recursive_exception = false; |
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689 } |
0 | 690 if (!top_frame_only && handler_bci < 0 && !skip_scope_increment) { |
691 sd = sd->sender(); | |
692 if (sd != NULL) { | |
693 bci = sd->bci(); | |
694 } | |
695 ++scope_depth; | |
696 } | |
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697 } while (recursive_exception || (!top_frame_only && handler_bci < 0 && sd != NULL)); |
0 | 698 } |
699 | |
700 // found handling method => lookup exception handler | |
1748 | 701 int catch_pco = ret_pc - nm->code_begin(); |
0 | 702 |
703 ExceptionHandlerTable table(nm); | |
704 HandlerTableEntry *t = table.entry_for(catch_pco, handler_bci, scope_depth); | |
705 if (t == NULL && (nm->is_compiled_by_c1() || handler_bci != -1)) { | |
706 // Allow abbreviated catch tables. The idea is to allow a method | |
707 // to materialize its exceptions without committing to the exact | |
708 // routing of exceptions. In particular this is needed for adding | |
709 // a synthethic handler to unlock monitors when inlining | |
710 // synchonized methods since the unlock path isn't represented in | |
711 // the bytecodes. | |
712 t = table.entry_for(catch_pco, -1, 0); | |
713 } | |
714 | |
1378
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715 #ifdef COMPILER1 |
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716 if (t == NULL && nm->is_compiled_by_c1()) { |
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717 assert(nm->unwind_handler_begin() != NULL, ""); |
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718 return nm->unwind_handler_begin(); |
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719 } |
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720 #endif |
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721 |
0 | 722 if (t == NULL) { |
723 tty->print_cr("MISSING EXCEPTION HANDLER for pc " INTPTR_FORMAT " and handler bci %d", ret_pc, handler_bci); | |
724 tty->print_cr(" Exception:"); | |
725 exception->print(); | |
726 tty->cr(); | |
727 tty->print_cr(" Compiled exception table :"); | |
728 table.print(); | |
729 nm->print_code(); | |
730 guarantee(false, "missing exception handler"); | |
731 return NULL; | |
732 } | |
733 | |
1748 | 734 return nm->code_begin() + t->pco(); |
0 | 735 } |
736 | |
737 JRT_ENTRY(void, SharedRuntime::throw_AbstractMethodError(JavaThread* thread)) | |
738 // These errors occur only at call sites | |
739 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_AbstractMethodError()); | |
740 JRT_END | |
741 | |
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742 JRT_ENTRY(void, SharedRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) |
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743 // These errors occur only at call sites |
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744 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_IncompatibleClassChangeError(), "vtable stub"); |
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745 JRT_END |
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746 |
0 | 747 JRT_ENTRY(void, SharedRuntime::throw_ArithmeticException(JavaThread* thread)) |
748 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_ArithmeticException(), "/ by zero"); | |
749 JRT_END | |
750 | |
751 JRT_ENTRY(void, SharedRuntime::throw_NullPointerException(JavaThread* thread)) | |
752 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_NullPointerException()); | |
753 JRT_END | |
754 | |
755 JRT_ENTRY(void, SharedRuntime::throw_NullPointerException_at_call(JavaThread* thread)) | |
756 // This entry point is effectively only used for NullPointerExceptions which occur at inline | |
757 // cache sites (when the callee activation is not yet set up) so we are at a call site | |
758 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_NullPointerException()); | |
759 JRT_END | |
760 | |
761 JRT_ENTRY(void, SharedRuntime::throw_StackOverflowError(JavaThread* thread)) | |
762 // We avoid using the normal exception construction in this case because | |
763 // it performs an upcall to Java, and we're already out of stack space. | |
764 klassOop k = SystemDictionary::StackOverflowError_klass(); | |
765 oop exception_oop = instanceKlass::cast(k)->allocate_instance(CHECK); | |
766 Handle exception (thread, exception_oop); | |
767 if (StackTraceInThrowable) { | |
768 java_lang_Throwable::fill_in_stack_trace(exception); | |
769 } | |
770 throw_and_post_jvmti_exception(thread, exception); | |
771 JRT_END | |
772 | |
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773 JRT_ENTRY(void, SharedRuntime::throw_WrongMethodTypeException(JavaThread* thread, oopDesc* required, oopDesc* actual)) |
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774 assert(thread == JavaThread::current() && required->is_oop() && actual->is_oop(), "bad args"); |
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775 ResourceMark rm; |
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776 char* message = SharedRuntime::generate_wrong_method_type_message(thread, required, actual); |
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777 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_invoke_WrongMethodTypeException(), message); |
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778 JRT_END |
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779 |
0 | 780 address SharedRuntime::continuation_for_implicit_exception(JavaThread* thread, |
781 address pc, | |
782 SharedRuntime::ImplicitExceptionKind exception_kind) | |
783 { | |
784 address target_pc = NULL; | |
785 | |
786 if (Interpreter::contains(pc)) { | |
787 #ifdef CC_INTERP | |
788 // C++ interpreter doesn't throw implicit exceptions | |
789 ShouldNotReachHere(); | |
790 #else | |
791 switch (exception_kind) { | |
792 case IMPLICIT_NULL: return Interpreter::throw_NullPointerException_entry(); | |
793 case IMPLICIT_DIVIDE_BY_ZERO: return Interpreter::throw_ArithmeticException_entry(); | |
794 case STACK_OVERFLOW: return Interpreter::throw_StackOverflowError_entry(); | |
795 default: ShouldNotReachHere(); | |
796 } | |
797 #endif // !CC_INTERP | |
798 } else { | |
799 switch (exception_kind) { | |
800 case STACK_OVERFLOW: { | |
801 // Stack overflow only occurs upon frame setup; the callee is | |
802 // going to be unwound. Dispatch to a shared runtime stub | |
803 // which will cause the StackOverflowError to be fabricated | |
804 // and processed. | |
805 // For stack overflow in deoptimization blob, cleanup thread. | |
806 if (thread->deopt_mark() != NULL) { | |
807 Deoptimization::cleanup_deopt_info(thread, NULL); | |
808 } | |
809 return StubRoutines::throw_StackOverflowError_entry(); | |
810 } | |
811 | |
812 case IMPLICIT_NULL: { | |
813 if (VtableStubs::contains(pc)) { | |
814 // We haven't yet entered the callee frame. Fabricate an | |
815 // exception and begin dispatching it in the caller. Since | |
816 // the caller was at a call site, it's safe to destroy all | |
817 // caller-saved registers, as these entry points do. | |
818 VtableStub* vt_stub = VtableStubs::stub_containing(pc); | |
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819 |
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820 // If vt_stub is NULL, then return NULL to signal handler to report the SEGV error. |
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821 if (vt_stub == NULL) return NULL; |
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822 |
0 | 823 if (vt_stub->is_abstract_method_error(pc)) { |
824 assert(!vt_stub->is_vtable_stub(), "should never see AbstractMethodErrors from vtable-type VtableStubs"); | |
825 return StubRoutines::throw_AbstractMethodError_entry(); | |
826 } else { | |
827 return StubRoutines::throw_NullPointerException_at_call_entry(); | |
828 } | |
829 } else { | |
830 CodeBlob* cb = CodeCache::find_blob(pc); | |
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831 |
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832 // If code blob is NULL, then return NULL to signal handler to report the SEGV error. |
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833 if (cb == NULL) return NULL; |
0 | 834 |
835 // Exception happened in CodeCache. Must be either: | |
836 // 1. Inline-cache check in C2I handler blob, | |
837 // 2. Inline-cache check in nmethod, or | |
838 // 3. Implict null exception in nmethod | |
839 | |
840 if (!cb->is_nmethod()) { | |
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841 guarantee(cb->is_adapter_blob() || cb->is_method_handles_adapter_blob(), |
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842 "exception happened outside interpreter, nmethods and vtable stubs (1)"); |
0 | 843 // There is no handler here, so we will simply unwind. |
844 return StubRoutines::throw_NullPointerException_at_call_entry(); | |
845 } | |
846 | |
847 // Otherwise, it's an nmethod. Consult its exception handlers. | |
848 nmethod* nm = (nmethod*)cb; | |
849 if (nm->inlinecache_check_contains(pc)) { | |
850 // exception happened inside inline-cache check code | |
851 // => the nmethod is not yet active (i.e., the frame | |
852 // is not set up yet) => use return address pushed by | |
853 // caller => don't push another return address | |
854 return StubRoutines::throw_NullPointerException_at_call_entry(); | |
855 } | |
856 | |
857 #ifndef PRODUCT | |
858 _implicit_null_throws++; | |
859 #endif | |
860 target_pc = nm->continuation_for_implicit_exception(pc); | |
1250 | 861 // If there's an unexpected fault, target_pc might be NULL, |
862 // in which case we want to fall through into the normal | |
863 // error handling code. | |
0 | 864 } |
865 | |
866 break; // fall through | |
867 } | |
868 | |
869 | |
870 case IMPLICIT_DIVIDE_BY_ZERO: { | |
871 nmethod* nm = CodeCache::find_nmethod(pc); | |
872 guarantee(nm != NULL, "must have containing nmethod for implicit division-by-zero exceptions"); | |
873 #ifndef PRODUCT | |
874 _implicit_div0_throws++; | |
875 #endif | |
876 target_pc = nm->continuation_for_implicit_exception(pc); | |
1250 | 877 // If there's an unexpected fault, target_pc might be NULL, |
878 // in which case we want to fall through into the normal | |
879 // error handling code. | |
0 | 880 break; // fall through |
881 } | |
882 | |
883 default: ShouldNotReachHere(); | |
884 } | |
885 | |
886 assert(exception_kind == IMPLICIT_NULL || exception_kind == IMPLICIT_DIVIDE_BY_ZERO, "wrong implicit exception kind"); | |
887 | |
888 // for AbortVMOnException flag | |
889 NOT_PRODUCT(Exceptions::debug_check_abort("java.lang.NullPointerException")); | |
890 if (exception_kind == IMPLICIT_NULL) { | |
891 Events::log("Implicit null exception at " INTPTR_FORMAT " to " INTPTR_FORMAT, pc, target_pc); | |
892 } else { | |
893 Events::log("Implicit division by zero exception at " INTPTR_FORMAT " to " INTPTR_FORMAT, pc, target_pc); | |
894 } | |
895 return target_pc; | |
896 } | |
897 | |
898 ShouldNotReachHere(); | |
899 return NULL; | |
900 } | |
901 | |
902 | |
903 JNI_ENTRY(void, throw_unsatisfied_link_error(JNIEnv* env, ...)) | |
904 { | |
905 THROW(vmSymbols::java_lang_UnsatisfiedLinkError()); | |
906 } | |
907 JNI_END | |
908 | |
909 | |
910 address SharedRuntime::native_method_throw_unsatisfied_link_error_entry() { | |
911 return CAST_FROM_FN_PTR(address, &throw_unsatisfied_link_error); | |
912 } | |
913 | |
914 | |
915 #ifndef PRODUCT | |
916 JRT_ENTRY(intptr_t, SharedRuntime::trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2)) | |
917 const frame f = thread->last_frame(); | |
918 assert(f.is_interpreted_frame(), "must be an interpreted frame"); | |
919 #ifndef PRODUCT | |
920 methodHandle mh(THREAD, f.interpreter_frame_method()); | |
921 BytecodeTracer::trace(mh, f.interpreter_frame_bcp(), tos, tos2); | |
922 #endif // !PRODUCT | |
923 return preserve_this_value; | |
924 JRT_END | |
925 #endif // !PRODUCT | |
926 | |
927 | |
928 JRT_ENTRY(void, SharedRuntime::yield_all(JavaThread* thread, int attempts)) | |
929 os::yield_all(attempts); | |
930 JRT_END | |
931 | |
932 | |
933 JRT_ENTRY_NO_ASYNC(void, SharedRuntime::register_finalizer(JavaThread* thread, oopDesc* obj)) | |
934 assert(obj->is_oop(), "must be a valid oop"); | |
935 assert(obj->klass()->klass_part()->has_finalizer(), "shouldn't be here otherwise"); | |
936 instanceKlass::register_finalizer(instanceOop(obj), CHECK); | |
937 JRT_END | |
938 | |
939 | |
940 jlong SharedRuntime::get_java_tid(Thread* thread) { | |
941 if (thread != NULL) { | |
942 if (thread->is_Java_thread()) { | |
943 oop obj = ((JavaThread*)thread)->threadObj(); | |
944 return (obj == NULL) ? 0 : java_lang_Thread::thread_id(obj); | |
945 } | |
946 } | |
947 return 0; | |
948 } | |
949 | |
950 /** | |
951 * This function ought to be a void function, but cannot be because | |
952 * it gets turned into a tail-call on sparc, which runs into dtrace bug | |
953 * 6254741. Once that is fixed we can remove the dummy return value. | |
954 */ | |
955 int SharedRuntime::dtrace_object_alloc(oopDesc* o) { | |
956 return dtrace_object_alloc_base(Thread::current(), o); | |
957 } | |
958 | |
959 int SharedRuntime::dtrace_object_alloc_base(Thread* thread, oopDesc* o) { | |
960 assert(DTraceAllocProbes, "wrong call"); | |
961 Klass* klass = o->blueprint(); | |
962 int size = o->size(); | |
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963 Symbol* name = klass->name(); |
4006 | 964 #ifndef USDT2 |
0 | 965 HS_DTRACE_PROBE4(hotspot, object__alloc, get_java_tid(thread), |
966 name->bytes(), name->utf8_length(), size * HeapWordSize); | |
4006 | 967 #else /* USDT2 */ |
968 HOTSPOT_OBJECT_ALLOC( | |
969 get_java_tid(thread), | |
970 (char *) name->bytes(), name->utf8_length(), size * HeapWordSize); | |
971 #endif /* USDT2 */ | |
0 | 972 return 0; |
973 } | |
974 | |
975 JRT_LEAF(int, SharedRuntime::dtrace_method_entry( | |
976 JavaThread* thread, methodOopDesc* method)) | |
977 assert(DTraceMethodProbes, "wrong call"); | |
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978 Symbol* kname = method->klass_name(); |
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979 Symbol* name = method->name(); |
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980 Symbol* sig = method->signature(); |
4006 | 981 #ifndef USDT2 |
0 | 982 HS_DTRACE_PROBE7(hotspot, method__entry, get_java_tid(thread), |
983 kname->bytes(), kname->utf8_length(), | |
984 name->bytes(), name->utf8_length(), | |
985 sig->bytes(), sig->utf8_length()); | |
4006 | 986 #else /* USDT2 */ |
987 HOTSPOT_METHOD_ENTRY( | |
988 get_java_tid(thread), | |
989 (char *) kname->bytes(), kname->utf8_length(), | |
990 (char *) name->bytes(), name->utf8_length(), | |
991 (char *) sig->bytes(), sig->utf8_length()); | |
992 #endif /* USDT2 */ | |
0 | 993 return 0; |
994 JRT_END | |
995 | |
996 JRT_LEAF(int, SharedRuntime::dtrace_method_exit( | |
997 JavaThread* thread, methodOopDesc* method)) | |
998 assert(DTraceMethodProbes, "wrong call"); | |
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999 Symbol* kname = method->klass_name(); |
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1000 Symbol* name = method->name(); |
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1001 Symbol* sig = method->signature(); |
4006 | 1002 #ifndef USDT2 |
0 | 1003 HS_DTRACE_PROBE7(hotspot, method__return, get_java_tid(thread), |
1004 kname->bytes(), kname->utf8_length(), | |
1005 name->bytes(), name->utf8_length(), | |
1006 sig->bytes(), sig->utf8_length()); | |
4006 | 1007 #else /* USDT2 */ |
1008 HOTSPOT_METHOD_RETURN( | |
1009 get_java_tid(thread), | |
1010 (char *) kname->bytes(), kname->utf8_length(), | |
1011 (char *) name->bytes(), name->utf8_length(), | |
1012 (char *) sig->bytes(), sig->utf8_length()); | |
1013 #endif /* USDT2 */ | |
0 | 1014 return 0; |
1015 JRT_END | |
1016 | |
1017 | |
1018 // Finds receiver, CallInfo (i.e. receiver method), and calling bytecode) | |
1019 // for a call current in progress, i.e., arguments has been pushed on stack | |
1020 // put callee has not been invoked yet. Used by: resolve virtual/static, | |
1021 // vtable updates, etc. Caller frame must be compiled. | |
1022 Handle SharedRuntime::find_callee_info(JavaThread* thread, Bytecodes::Code& bc, CallInfo& callinfo, TRAPS) { | |
1023 ResourceMark rm(THREAD); | |
1024 | |
1025 // last java frame on stack (which includes native call frames) | |
1026 vframeStream vfst(thread, true); // Do not skip and javaCalls | |
1027 | |
1028 return find_callee_info_helper(thread, vfst, bc, callinfo, CHECK_(Handle())); | |
1029 } | |
1030 | |
1031 | |
1032 // Finds receiver, CallInfo (i.e. receiver method), and calling bytecode | |
1033 // for a call current in progress, i.e., arguments has been pushed on stack | |
1034 // but callee has not been invoked yet. Caller frame must be compiled. | |
1035 Handle SharedRuntime::find_callee_info_helper(JavaThread* thread, | |
1036 vframeStream& vfst, | |
1037 Bytecodes::Code& bc, | |
1038 CallInfo& callinfo, TRAPS) { | |
1039 Handle receiver; | |
1040 Handle nullHandle; //create a handy null handle for exception returns | |
1041 | |
1042 assert(!vfst.at_end(), "Java frame must exist"); | |
1043 | |
1044 // Find caller and bci from vframe | |
1045 methodHandle caller (THREAD, vfst.method()); | |
1046 int bci = vfst.bci(); | |
1047 | |
1048 // Find bytecode | |
2142 | 1049 Bytecode_invoke bytecode(caller, bci); |
1050 bc = bytecode.java_code(); | |
1051 int bytecode_index = bytecode.index(); | |
0 | 1052 |
1053 // Find receiver for non-static call | |
1054 if (bc != Bytecodes::_invokestatic) { | |
1055 // This register map must be update since we need to find the receiver for | |
1056 // compiled frames. The receiver might be in a register. | |
1057 RegisterMap reg_map2(thread); | |
1058 frame stubFrame = thread->last_frame(); | |
1059 // Caller-frame is a compiled frame | |
1060 frame callerFrame = stubFrame.sender(®_map2); | |
1061 | |
2142 | 1062 methodHandle callee = bytecode.static_target(CHECK_(nullHandle)); |
0 | 1063 if (callee.is_null()) { |
1064 THROW_(vmSymbols::java_lang_NoSuchMethodException(), nullHandle); | |
1065 } | |
1066 // Retrieve from a compiled argument list | |
1067 receiver = Handle(THREAD, callerFrame.retrieve_receiver(®_map2)); | |
1068 | |
1069 if (receiver.is_null()) { | |
1070 THROW_(vmSymbols::java_lang_NullPointerException(), nullHandle); | |
1071 } | |
1072 } | |
1073 | |
1074 // Resolve method. This is parameterized by bytecode. | |
1075 constantPoolHandle constants (THREAD, caller->constants()); | |
1076 assert (receiver.is_null() || receiver->is_oop(), "wrong receiver"); | |
1077 LinkResolver::resolve_invoke(callinfo, receiver, constants, bytecode_index, bc, CHECK_(nullHandle)); | |
1078 | |
1079 #ifdef ASSERT | |
1080 // Check that the receiver klass is of the right subtype and that it is initialized for virtual calls | |
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1081 if (bc != Bytecodes::_invokestatic && bc != Bytecodes::_invokedynamic) { |
0 | 1082 assert(receiver.not_null(), "should have thrown exception"); |
1083 KlassHandle receiver_klass (THREAD, receiver->klass()); | |
1084 klassOop rk = constants->klass_ref_at(bytecode_index, CHECK_(nullHandle)); | |
1085 // klass is already loaded | |
1086 KlassHandle static_receiver_klass (THREAD, rk); | |
1087 assert(receiver_klass->is_subtype_of(static_receiver_klass()), "actual receiver must be subclass of static receiver klass"); | |
1088 if (receiver_klass->oop_is_instance()) { | |
1089 if (instanceKlass::cast(receiver_klass())->is_not_initialized()) { | |
1090 tty->print_cr("ERROR: Klass not yet initialized!!"); | |
1091 receiver_klass.print(); | |
1092 } | |
1093 assert (!instanceKlass::cast(receiver_klass())->is_not_initialized(), "receiver_klass must be initialized"); | |
1094 } | |
1095 } | |
1096 #endif | |
1097 | |
1098 return receiver; | |
1099 } | |
1100 | |
1101 methodHandle SharedRuntime::find_callee_method(JavaThread* thread, TRAPS) { | |
1102 ResourceMark rm(THREAD); | |
1103 // We need first to check if any Java activations (compiled, interpreted) | |
1104 // exist on the stack since last JavaCall. If not, we need | |
1105 // to get the target method from the JavaCall wrapper. | |
1106 vframeStream vfst(thread, true); // Do not skip any javaCalls | |
1107 methodHandle callee_method; | |
1108 if (vfst.at_end()) { | |
1109 // No Java frames were found on stack since we did the JavaCall. | |
1110 // Hence the stack can only contain an entry_frame. We need to | |
1111 // find the target method from the stub frame. | |
1112 RegisterMap reg_map(thread, false); | |
1113 frame fr = thread->last_frame(); | |
1114 assert(fr.is_runtime_frame(), "must be a runtimeStub"); | |
1115 fr = fr.sender(®_map); | |
1116 assert(fr.is_entry_frame(), "must be"); | |
1117 // fr is now pointing to the entry frame. | |
1118 callee_method = methodHandle(THREAD, fr.entry_frame_call_wrapper()->callee_method()); | |
1119 assert(fr.entry_frame_call_wrapper()->receiver() == NULL || !callee_method->is_static(), "non-null receiver for static call??"); | |
1120 } else { | |
1121 Bytecodes::Code bc; | |
1122 CallInfo callinfo; | |
1123 find_callee_info_helper(thread, vfst, bc, callinfo, CHECK_(methodHandle())); | |
1124 callee_method = callinfo.selected_method(); | |
1125 } | |
1126 assert(callee_method()->is_method(), "must be"); | |
1127 return callee_method; | |
1128 } | |
1129 | |
1130 // Resolves a call. | |
1131 methodHandle SharedRuntime::resolve_helper(JavaThread *thread, | |
1132 bool is_virtual, | |
1133 bool is_optimized, TRAPS) { | |
1134 methodHandle callee_method; | |
1135 callee_method = resolve_sub_helper(thread, is_virtual, is_optimized, THREAD); | |
1136 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { | |
1137 int retry_count = 0; | |
1138 while (!HAS_PENDING_EXCEPTION && callee_method->is_old() && | |
1142 | 1139 callee_method->method_holder() != SystemDictionary::Object_klass()) { |
0 | 1140 // If has a pending exception then there is no need to re-try to |
1141 // resolve this method. | |
1142 // If the method has been redefined, we need to try again. | |
1143 // Hack: we have no way to update the vtables of arrays, so don't | |
1144 // require that java.lang.Object has been updated. | |
1145 | |
1146 // It is very unlikely that method is redefined more than 100 times | |
1147 // in the middle of resolve. If it is looping here more than 100 times | |
1148 // means then there could be a bug here. | |
1149 guarantee((retry_count++ < 100), | |
1150 "Could not resolve to latest version of redefined method"); | |
1151 // method is redefined in the middle of resolve so re-try. | |
1152 callee_method = resolve_sub_helper(thread, is_virtual, is_optimized, THREAD); | |
1153 } | |
1154 } | |
1155 return callee_method; | |
1156 } | |
1157 | |
1158 // Resolves a call. The compilers generate code for calls that go here | |
1159 // and are patched with the real destination of the call. | |
1160 methodHandle SharedRuntime::resolve_sub_helper(JavaThread *thread, | |
1161 bool is_virtual, | |
1162 bool is_optimized, TRAPS) { | |
1163 | |
1164 ResourceMark rm(thread); | |
1165 RegisterMap cbl_map(thread, false); | |
1166 frame caller_frame = thread->last_frame().sender(&cbl_map); | |
1167 | |
1295 | 1168 CodeBlob* caller_cb = caller_frame.cb(); |
1169 guarantee(caller_cb != NULL && caller_cb->is_nmethod(), "must be called from nmethod"); | |
1170 nmethod* caller_nm = caller_cb->as_nmethod_or_null(); | |
0 | 1171 // make sure caller is not getting deoptimized |
1172 // and removed before we are done with it. | |
1173 // CLEANUP - with lazy deopt shouldn't need this lock | |
1295 | 1174 nmethodLocker caller_lock(caller_nm); |
0 | 1175 |
1176 | |
1177 // determine call info & receiver | |
1178 // note: a) receiver is NULL for static calls | |
1179 // b) an exception is thrown if receiver is NULL for non-static calls | |
1180 CallInfo call_info; | |
1181 Bytecodes::Code invoke_code = Bytecodes::_illegal; | |
1182 Handle receiver = find_callee_info(thread, invoke_code, | |
1183 call_info, CHECK_(methodHandle())); | |
1184 methodHandle callee_method = call_info.selected_method(); | |
1185 | |
1186 assert((!is_virtual && invoke_code == Bytecodes::_invokestatic) || | |
1187 ( is_virtual && invoke_code != Bytecodes::_invokestatic), "inconsistent bytecode"); | |
1188 | |
1189 #ifndef PRODUCT | |
1190 // tracing/debugging/statistics | |
1191 int *addr = (is_optimized) ? (&_resolve_opt_virtual_ctr) : | |
1192 (is_virtual) ? (&_resolve_virtual_ctr) : | |
1193 (&_resolve_static_ctr); | |
1194 Atomic::inc(addr); | |
1195 | |
1196 if (TraceCallFixup) { | |
1197 ResourceMark rm(thread); | |
1198 tty->print("resolving %s%s (%s) call to", | |
1199 (is_optimized) ? "optimized " : "", (is_virtual) ? "virtual" : "static", | |
1200 Bytecodes::name(invoke_code)); | |
1201 callee_method->print_short_name(tty); | |
1202 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1203 } | |
1204 #endif | |
1205 | |
1295 | 1206 // JSR 292 |
1207 // If the resolved method is a MethodHandle invoke target the call | |
1208 // site must be a MethodHandle call site. | |
1209 if (callee_method->is_method_handle_invoke()) { | |
1210 assert(caller_nm->is_method_handle_return(caller_frame.pc()), "must be MH call site"); | |
1211 } | |
1212 | |
0 | 1213 // Compute entry points. This might require generation of C2I converter |
1214 // frames, so we cannot be holding any locks here. Furthermore, the | |
1215 // computation of the entry points is independent of patching the call. We | |
1216 // always return the entry-point, but we only patch the stub if the call has | |
1217 // not been deoptimized. Return values: For a virtual call this is an | |
1218 // (cached_oop, destination address) pair. For a static call/optimized | |
1219 // virtual this is just a destination address. | |
1220 | |
1221 StaticCallInfo static_call_info; | |
1222 CompiledICInfo virtual_call_info; | |
1223 | |
1224 // Make sure the callee nmethod does not get deoptimized and removed before | |
1225 // we are done patching the code. | |
1295 | 1226 nmethod* callee_nm = callee_method->code(); |
1227 nmethodLocker nl_callee(callee_nm); | |
0 | 1228 #ifdef ASSERT |
1295 | 1229 address dest_entry_point = callee_nm == NULL ? 0 : callee_nm->entry_point(); // used below |
0 | 1230 #endif |
1231 | |
1232 if (is_virtual) { | |
1233 assert(receiver.not_null(), "sanity check"); | |
1234 bool static_bound = call_info.resolved_method()->can_be_statically_bound(); | |
1235 KlassHandle h_klass(THREAD, receiver->klass()); | |
1236 CompiledIC::compute_monomorphic_entry(callee_method, h_klass, | |
1237 is_optimized, static_bound, virtual_call_info, | |
1238 CHECK_(methodHandle())); | |
1239 } else { | |
1240 // static call | |
1241 CompiledStaticCall::compute_entry(callee_method, static_call_info); | |
1242 } | |
1243 | |
1244 // grab lock, check for deoptimization and potentially patch caller | |
1245 { | |
1246 MutexLocker ml_patch(CompiledIC_lock); | |
1247 | |
1248 // Now that we are ready to patch if the methodOop was redefined then | |
1249 // don't update call site and let the caller retry. | |
1250 | |
1251 if (!callee_method->is_old()) { | |
1252 #ifdef ASSERT | |
1253 // We must not try to patch to jump to an already unloaded method. | |
1254 if (dest_entry_point != 0) { | |
1255 assert(CodeCache::find_blob(dest_entry_point) != NULL, | |
1256 "should not unload nmethod while locked"); | |
1257 } | |
1258 #endif | |
1259 if (is_virtual) { | |
1260 CompiledIC* inline_cache = CompiledIC_before(caller_frame.pc()); | |
1261 if (inline_cache->is_clean()) { | |
1262 inline_cache->set_to_monomorphic(virtual_call_info); | |
1263 } | |
1264 } else { | |
1265 CompiledStaticCall* ssc = compiledStaticCall_before(caller_frame.pc()); | |
1266 if (ssc->is_clean()) ssc->set(static_call_info); | |
1267 } | |
1268 } | |
1269 | |
1270 } // unlock CompiledIC_lock | |
1271 | |
1272 return callee_method; | |
1273 } | |
1274 | |
1275 | |
1276 // Inline caches exist only in compiled code | |
1277 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method_ic_miss(JavaThread* thread)) | |
1278 #ifdef ASSERT | |
1279 RegisterMap reg_map(thread, false); | |
1280 frame stub_frame = thread->last_frame(); | |
1281 assert(stub_frame.is_runtime_frame(), "sanity check"); | |
1282 frame caller_frame = stub_frame.sender(®_map); | |
1283 assert(!caller_frame.is_interpreted_frame() && !caller_frame.is_entry_frame(), "unexpected frame"); | |
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1284 assert(!caller_frame.is_ricochet_frame(), "unexpected frame"); |
0 | 1285 #endif /* ASSERT */ |
1286 | |
1287 methodHandle callee_method; | |
1288 JRT_BLOCK | |
1289 callee_method = SharedRuntime::handle_ic_miss_helper(thread, CHECK_NULL); | |
1290 // Return methodOop through TLS | |
1291 thread->set_vm_result(callee_method()); | |
1292 JRT_BLOCK_END | |
1293 // return compiled code entry point after potential safepoints | |
1294 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
1295 return callee_method->verified_code_entry(); | |
1296 JRT_END | |
1297 | |
1298 | |
1299 // Handle call site that has been made non-entrant | |
1300 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method(JavaThread* thread)) | |
1301 // 6243940 We might end up in here if the callee is deoptimized | |
1302 // as we race to call it. We don't want to take a safepoint if | |
1303 // the caller was interpreted because the caller frame will look | |
1304 // interpreted to the stack walkers and arguments are now | |
1305 // "compiled" so it is much better to make this transition | |
1306 // invisible to the stack walking code. The i2c path will | |
1307 // place the callee method in the callee_target. It is stashed | |
1308 // there because if we try and find the callee by normal means a | |
1309 // safepoint is possible and have trouble gc'ing the compiled args. | |
1310 RegisterMap reg_map(thread, false); | |
1311 frame stub_frame = thread->last_frame(); | |
1312 assert(stub_frame.is_runtime_frame(), "sanity check"); | |
1313 frame caller_frame = stub_frame.sender(®_map); | |
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1314 |
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1315 // MethodHandle invokes don't have a CompiledIC and should always |
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1316 // simply redispatch to the callee_target. |
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1317 address sender_pc = caller_frame.pc(); |
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1318 CodeBlob* sender_cb = caller_frame.cb(); |
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1319 nmethod* sender_nm = sender_cb->as_nmethod_or_null(); |
1204 | 1320 bool is_mh_invoke_via_adapter = false; // Direct c2c call or via adapter? |
1321 if (sender_nm != NULL && sender_nm->is_method_handle_return(sender_pc)) { | |
1322 // If the callee_target is set, then we have come here via an i2c | |
1323 // adapter. | |
1324 methodOop callee = thread->callee_target(); | |
1325 if (callee != NULL) { | |
1326 assert(callee->is_method(), "sanity"); | |
1327 is_mh_invoke_via_adapter = true; | |
1328 } | |
1329 } | |
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1330 |
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1331 if (caller_frame.is_interpreted_frame() || |
1204 | 1332 caller_frame.is_entry_frame() || |
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1333 caller_frame.is_ricochet_frame() || |
1204 | 1334 is_mh_invoke_via_adapter) { |
0 | 1335 methodOop callee = thread->callee_target(); |
1336 guarantee(callee != NULL && callee->is_method(), "bad handshake"); | |
1337 thread->set_vm_result(callee); | |
1338 thread->set_callee_target(NULL); | |
1339 return callee->get_c2i_entry(); | |
1340 } | |
1341 | |
1342 // Must be compiled to compiled path which is safe to stackwalk | |
1343 methodHandle callee_method; | |
1344 JRT_BLOCK | |
1345 // Force resolving of caller (if we called from compiled frame) | |
1346 callee_method = SharedRuntime::reresolve_call_site(thread, CHECK_NULL); | |
1347 thread->set_vm_result(callee_method()); | |
1348 JRT_BLOCK_END | |
1349 // return compiled code entry point after potential safepoints | |
1350 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
1351 return callee_method->verified_code_entry(); | |
1352 JRT_END | |
1353 | |
1354 | |
1355 // resolve a static call and patch code | |
1356 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_static_call_C(JavaThread *thread )) | |
1357 methodHandle callee_method; | |
1358 JRT_BLOCK | |
1359 callee_method = SharedRuntime::resolve_helper(thread, false, false, CHECK_NULL); | |
1360 thread->set_vm_result(callee_method()); | |
1361 JRT_BLOCK_END | |
1362 // return compiled code entry point after potential safepoints | |
1363 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
1364 return callee_method->verified_code_entry(); | |
1365 JRT_END | |
1366 | |
1367 | |
1368 // resolve virtual call and update inline cache to monomorphic | |
1369 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_virtual_call_C(JavaThread *thread )) | |
1370 methodHandle callee_method; | |
1371 JRT_BLOCK | |
1372 callee_method = SharedRuntime::resolve_helper(thread, true, false, CHECK_NULL); | |
1373 thread->set_vm_result(callee_method()); | |
1374 JRT_BLOCK_END | |
1375 // return compiled code entry point after potential safepoints | |
1376 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
1377 return callee_method->verified_code_entry(); | |
1378 JRT_END | |
1379 | |
1380 | |
1381 // Resolve a virtual call that can be statically bound (e.g., always | |
1382 // monomorphic, so it has no inline cache). Patch code to resolved target. | |
1383 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_opt_virtual_call_C(JavaThread *thread)) | |
1384 methodHandle callee_method; | |
1385 JRT_BLOCK | |
1386 callee_method = SharedRuntime::resolve_helper(thread, true, true, CHECK_NULL); | |
1387 thread->set_vm_result(callee_method()); | |
1388 JRT_BLOCK_END | |
1389 // return compiled code entry point after potential safepoints | |
1390 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
1391 return callee_method->verified_code_entry(); | |
1392 JRT_END | |
1393 | |
1394 | |
1395 | |
1396 | |
1397 | |
1398 methodHandle SharedRuntime::handle_ic_miss_helper(JavaThread *thread, TRAPS) { | |
1399 ResourceMark rm(thread); | |
1400 CallInfo call_info; | |
1401 Bytecodes::Code bc; | |
1402 | |
1403 // receiver is NULL for static calls. An exception is thrown for NULL | |
1404 // receivers for non-static calls | |
1405 Handle receiver = find_callee_info(thread, bc, call_info, | |
1406 CHECK_(methodHandle())); | |
1407 // Compiler1 can produce virtual call sites that can actually be statically bound | |
1408 // If we fell thru to below we would think that the site was going megamorphic | |
1409 // when in fact the site can never miss. Worse because we'd think it was megamorphic | |
1410 // we'd try and do a vtable dispatch however methods that can be statically bound | |
1411 // don't have vtable entries (vtable_index < 0) and we'd blow up. So we force a | |
1412 // reresolution of the call site (as if we did a handle_wrong_method and not an | |
1413 // plain ic_miss) and the site will be converted to an optimized virtual call site | |
1414 // never to miss again. I don't believe C2 will produce code like this but if it | |
1415 // did this would still be the correct thing to do for it too, hence no ifdef. | |
1416 // | |
1417 if (call_info.resolved_method()->can_be_statically_bound()) { | |
1418 methodHandle callee_method = SharedRuntime::reresolve_call_site(thread, CHECK_(methodHandle())); | |
1419 if (TraceCallFixup) { | |
1420 RegisterMap reg_map(thread, false); | |
1421 frame caller_frame = thread->last_frame().sender(®_map); | |
1422 ResourceMark rm(thread); | |
1423 tty->print("converting IC miss to reresolve (%s) call to", Bytecodes::name(bc)); | |
1424 callee_method->print_short_name(tty); | |
1425 tty->print_cr(" from pc: " INTPTR_FORMAT, caller_frame.pc()); | |
1426 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1427 } | |
1428 return callee_method; | |
1429 } | |
1430 | |
1431 methodHandle callee_method = call_info.selected_method(); | |
1432 | |
1433 bool should_be_mono = false; | |
1434 | |
1435 #ifndef PRODUCT | |
1436 Atomic::inc(&_ic_miss_ctr); | |
1437 | |
1438 // Statistics & Tracing | |
1439 if (TraceCallFixup) { | |
1440 ResourceMark rm(thread); | |
1441 tty->print("IC miss (%s) call to", Bytecodes::name(bc)); | |
1442 callee_method->print_short_name(tty); | |
1443 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1444 } | |
1445 | |
1446 if (ICMissHistogram) { | |
1447 MutexLocker m(VMStatistic_lock); | |
1448 RegisterMap reg_map(thread, false); | |
1449 frame f = thread->last_frame().real_sender(®_map);// skip runtime stub | |
1450 // produce statistics under the lock | |
1451 trace_ic_miss(f.pc()); | |
1452 } | |
1453 #endif | |
1454 | |
1455 // install an event collector so that when a vtable stub is created the | |
1456 // profiler can be notified via a DYNAMIC_CODE_GENERATED event. The | |
1457 // event can't be posted when the stub is created as locks are held | |
1458 // - instead the event will be deferred until the event collector goes | |
1459 // out of scope. | |
1460 JvmtiDynamicCodeEventCollector event_collector; | |
1461 | |
1462 // Update inline cache to megamorphic. Skip update if caller has been | |
1463 // made non-entrant or we are called from interpreted. | |
1464 { MutexLocker ml_patch (CompiledIC_lock); | |
1465 RegisterMap reg_map(thread, false); | |
1466 frame caller_frame = thread->last_frame().sender(®_map); | |
1467 CodeBlob* cb = caller_frame.cb(); | |
1468 if (cb->is_nmethod() && ((nmethod*)cb)->is_in_use()) { | |
1469 // Not a non-entrant nmethod, so find inline_cache | |
1470 CompiledIC* inline_cache = CompiledIC_before(caller_frame.pc()); | |
1471 bool should_be_mono = false; | |
1472 if (inline_cache->is_optimized()) { | |
1473 if (TraceCallFixup) { | |
1474 ResourceMark rm(thread); | |
1475 tty->print("OPTIMIZED IC miss (%s) call to", Bytecodes::name(bc)); | |
1476 callee_method->print_short_name(tty); | |
1477 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1478 } | |
1479 should_be_mono = true; | |
1480 } else { | |
1481 compiledICHolderOop ic_oop = (compiledICHolderOop) inline_cache->cached_oop(); | |
1482 if ( ic_oop != NULL && ic_oop->is_compiledICHolder()) { | |
1483 | |
1484 if (receiver()->klass() == ic_oop->holder_klass()) { | |
1485 // This isn't a real miss. We must have seen that compiled code | |
1486 // is now available and we want the call site converted to a | |
1487 // monomorphic compiled call site. | |
1488 // We can't assert for callee_method->code() != NULL because it | |
1489 // could have been deoptimized in the meantime | |
1490 if (TraceCallFixup) { | |
1491 ResourceMark rm(thread); | |
1492 tty->print("FALSE IC miss (%s) converting to compiled call to", Bytecodes::name(bc)); | |
1493 callee_method->print_short_name(tty); | |
1494 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1495 } | |
1496 should_be_mono = true; | |
1497 } | |
1498 } | |
1499 } | |
1500 | |
1501 if (should_be_mono) { | |
1502 | |
1503 // We have a path that was monomorphic but was going interpreted | |
1504 // and now we have (or had) a compiled entry. We correct the IC | |
1505 // by using a new icBuffer. | |
1506 CompiledICInfo info; | |
1507 KlassHandle receiver_klass(THREAD, receiver()->klass()); | |
1508 inline_cache->compute_monomorphic_entry(callee_method, | |
1509 receiver_klass, | |
1510 inline_cache->is_optimized(), | |
1511 false, | |
1512 info, CHECK_(methodHandle())); | |
1513 inline_cache->set_to_monomorphic(info); | |
1514 } else if (!inline_cache->is_megamorphic() && !inline_cache->is_clean()) { | |
1515 // Change to megamorphic | |
1516 inline_cache->set_to_megamorphic(&call_info, bc, CHECK_(methodHandle())); | |
1517 } else { | |
1518 // Either clean or megamorphic | |
1519 } | |
1520 } | |
1521 } // Release CompiledIC_lock | |
1522 | |
1523 return callee_method; | |
1524 } | |
1525 | |
1526 // | |
1527 // Resets a call-site in compiled code so it will get resolved again. | |
1528 // This routines handles both virtual call sites, optimized virtual call | |
1529 // sites, and static call sites. Typically used to change a call sites | |
1530 // destination from compiled to interpreted. | |
1531 // | |
1532 methodHandle SharedRuntime::reresolve_call_site(JavaThread *thread, TRAPS) { | |
1533 ResourceMark rm(thread); | |
1534 RegisterMap reg_map(thread, false); | |
1535 frame stub_frame = thread->last_frame(); | |
1536 assert(stub_frame.is_runtime_frame(), "must be a runtimeStub"); | |
1537 frame caller = stub_frame.sender(®_map); | |
1538 | |
1539 // Do nothing if the frame isn't a live compiled frame. | |
1540 // nmethod could be deoptimized by the time we get here | |
1541 // so no update to the caller is needed. | |
1542 | |
1543 if (caller.is_compiled_frame() && !caller.is_deoptimized_frame()) { | |
1544 | |
1545 address pc = caller.pc(); | |
1546 Events::log("update call-site at pc " INTPTR_FORMAT, pc); | |
1547 | |
1548 // Default call_addr is the location of the "basic" call. | |
1549 // Determine the address of the call we a reresolving. With | |
1550 // Inline Caches we will always find a recognizable call. | |
1551 // With Inline Caches disabled we may or may not find a | |
1552 // recognizable call. We will always find a call for static | |
1553 // calls and for optimized virtual calls. For vanilla virtual | |
1554 // calls it depends on the state of the UseInlineCaches switch. | |
1555 // | |
1556 // With Inline Caches disabled we can get here for a virtual call | |
1557 // for two reasons: | |
1558 // 1 - calling an abstract method. The vtable for abstract methods | |
1559 // will run us thru handle_wrong_method and we will eventually | |
1560 // end up in the interpreter to throw the ame. | |
1561 // 2 - a racing deoptimization. We could be doing a vanilla vtable | |
1562 // call and between the time we fetch the entry address and | |
1563 // we jump to it the target gets deoptimized. Similar to 1 | |
1564 // we will wind up in the interprter (thru a c2i with c2). | |
1565 // | |
1566 address call_addr = NULL; | |
1567 { | |
1568 // Get call instruction under lock because another thread may be | |
1569 // busy patching it. | |
1570 MutexLockerEx ml_patch(Patching_lock, Mutex::_no_safepoint_check_flag); | |
1571 // Location of call instruction | |
1572 if (NativeCall::is_call_before(pc)) { | |
1573 NativeCall *ncall = nativeCall_before(pc); | |
1574 call_addr = ncall->instruction_address(); | |
1575 } | |
1576 } | |
1577 | |
1578 // Check for static or virtual call | |
1579 bool is_static_call = false; | |
1580 nmethod* caller_nm = CodeCache::find_nmethod(pc); | |
1581 // Make sure nmethod doesn't get deoptimized and removed until | |
1582 // this is done with it. | |
1583 // CLEANUP - with lazy deopt shouldn't need this lock | |
1584 nmethodLocker nmlock(caller_nm); | |
1585 | |
1586 if (call_addr != NULL) { | |
1587 RelocIterator iter(caller_nm, call_addr, call_addr+1); | |
1588 int ret = iter.next(); // Get item | |
1589 if (ret) { | |
1590 assert(iter.addr() == call_addr, "must find call"); | |
1591 if (iter.type() == relocInfo::static_call_type) { | |
1592 is_static_call = true; | |
1593 } else { | |
1594 assert(iter.type() == relocInfo::virtual_call_type || | |
1595 iter.type() == relocInfo::opt_virtual_call_type | |
1596 , "unexpected relocInfo. type"); | |
1597 } | |
1598 } else { | |
1599 assert(!UseInlineCaches, "relocation info. must exist for this address"); | |
1600 } | |
1601 | |
1602 // Cleaning the inline cache will force a new resolve. This is more robust | |
1603 // than directly setting it to the new destination, since resolving of calls | |
1604 // is always done through the same code path. (experience shows that it | |
1605 // leads to very hard to track down bugs, if an inline cache gets updated | |
1606 // to a wrong method). It should not be performance critical, since the | |
1607 // resolve is only done once. | |
1608 | |
1609 MutexLocker ml(CompiledIC_lock); | |
1610 // | |
1611 // We do not patch the call site if the nmethod has been made non-entrant | |
1612 // as it is a waste of time | |
1613 // | |
1614 if (caller_nm->is_in_use()) { | |
1615 if (is_static_call) { | |
1616 CompiledStaticCall* ssc= compiledStaticCall_at(call_addr); | |
1617 ssc->set_to_clean(); | |
1618 } else { | |
1619 // compiled, dispatched call (which used to call an interpreted method) | |
1620 CompiledIC* inline_cache = CompiledIC_at(call_addr); | |
1621 inline_cache->set_to_clean(); | |
1622 } | |
1623 } | |
1624 } | |
1625 | |
1626 } | |
1627 | |
1628 methodHandle callee_method = find_callee_method(thread, CHECK_(methodHandle())); | |
1629 | |
1630 | |
1631 #ifndef PRODUCT | |
1632 Atomic::inc(&_wrong_method_ctr); | |
1633 | |
1634 if (TraceCallFixup) { | |
1635 ResourceMark rm(thread); | |
1636 tty->print("handle_wrong_method reresolving call to"); | |
1637 callee_method->print_short_name(tty); | |
1638 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1639 } | |
1640 #endif | |
1641 | |
1642 return callee_method; | |
1643 } | |
1644 | |
1645 // --------------------------------------------------------------------------- | |
1646 // We are calling the interpreter via a c2i. Normally this would mean that | |
1647 // we were called by a compiled method. However we could have lost a race | |
1648 // where we went int -> i2c -> c2i and so the caller could in fact be | |
1205 | 1649 // interpreted. If the caller is compiled we attempt to patch the caller |
0 | 1650 // so he no longer calls into the interpreter. |
1651 IRT_LEAF(void, SharedRuntime::fixup_callers_callsite(methodOopDesc* method, address caller_pc)) | |
1652 methodOop moop(method); | |
1653 | |
1654 address entry_point = moop->from_compiled_entry(); | |
1655 | |
1656 // It's possible that deoptimization can occur at a call site which hasn't | |
1657 // been resolved yet, in which case this function will be called from | |
1658 // an nmethod that has been patched for deopt and we can ignore the | |
1659 // request for a fixup. | |
1660 // Also it is possible that we lost a race in that from_compiled_entry | |
1661 // is now back to the i2c in that case we don't need to patch and if | |
1662 // we did we'd leap into space because the callsite needs to use | |
1663 // "to interpreter" stub in order to load up the methodOop. Don't | |
1664 // ask me how I know this... | |
1665 | |
1666 CodeBlob* cb = CodeCache::find_blob(caller_pc); | |
1205 | 1667 if (!cb->is_nmethod() || entry_point == moop->get_c2i_entry()) { |
1668 return; | |
1669 } | |
1670 | |
1671 // The check above makes sure this is a nmethod. | |
1672 nmethod* nm = cb->as_nmethod_or_null(); | |
1673 assert(nm, "must be"); | |
1674 | |
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1675 // Get the return PC for the passed caller PC. |
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1676 address return_pc = caller_pc + frame::pc_return_offset; |
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1677 |
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1678 // Don't fixup method handle call sites as the executed method |
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1679 // handle adapters are doing the required MethodHandle chain work. |
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1680 if (nm->is_method_handle_return(return_pc)) { |
0 | 1681 return; |
1682 } | |
1683 | |
1684 // There is a benign race here. We could be attempting to patch to a compiled | |
1685 // entry point at the same time the callee is being deoptimized. If that is | |
1686 // the case then entry_point may in fact point to a c2i and we'd patch the | |
1687 // call site with the same old data. clear_code will set code() to NULL | |
1688 // at the end of it. If we happen to see that NULL then we can skip trying | |
1689 // to patch. If we hit the window where the callee has a c2i in the | |
1690 // from_compiled_entry and the NULL isn't present yet then we lose the race | |
1691 // and patch the code with the same old data. Asi es la vida. | |
1692 | |
1693 if (moop->code() == NULL) return; | |
1694 | |
1205 | 1695 if (nm->is_in_use()) { |
0 | 1696 |
1697 // Expect to find a native call there (unless it was no-inline cache vtable dispatch) | |
1698 MutexLockerEx ml_patch(Patching_lock, Mutex::_no_safepoint_check_flag); | |
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1699 if (NativeCall::is_call_before(return_pc)) { |
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1700 NativeCall *call = nativeCall_before(return_pc); |
0 | 1701 // |
1702 // bug 6281185. We might get here after resolving a call site to a vanilla | |
1703 // virtual call. Because the resolvee uses the verified entry it may then | |
1704 // see compiled code and attempt to patch the site by calling us. This would | |
1705 // then incorrectly convert the call site to optimized and its downhill from | |
1706 // there. If you're lucky you'll get the assert in the bugid, if not you've | |
1707 // just made a call site that could be megamorphic into a monomorphic site | |
1708 // for the rest of its life! Just another racing bug in the life of | |
1709 // fixup_callers_callsite ... | |
1710 // | |
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1711 RelocIterator iter(nm, call->instruction_address(), call->next_instruction_address()); |
0 | 1712 iter.next(); |
1713 assert(iter.has_current(), "must have a reloc at java call site"); | |
1714 relocInfo::relocType typ = iter.reloc()->type(); | |
1715 if ( typ != relocInfo::static_call_type && | |
1716 typ != relocInfo::opt_virtual_call_type && | |
1717 typ != relocInfo::static_stub_type) { | |
1718 return; | |
1719 } | |
1720 address destination = call->destination(); | |
1721 if (destination != entry_point) { | |
1722 CodeBlob* callee = CodeCache::find_blob(destination); | |
1723 // callee == cb seems weird. It means calling interpreter thru stub. | |
1724 if (callee == cb || callee->is_adapter_blob()) { | |
1725 // static call or optimized virtual | |
1726 if (TraceCallFixup) { | |
1204 | 1727 tty->print("fixup callsite at " INTPTR_FORMAT " to compiled code for", caller_pc); |
0 | 1728 moop->print_short_name(tty); |
1729 tty->print_cr(" to " INTPTR_FORMAT, entry_point); | |
1730 } | |
1731 call->set_destination_mt_safe(entry_point); | |
1732 } else { | |
1733 if (TraceCallFixup) { | |
1734 tty->print("failed to fixup callsite at " INTPTR_FORMAT " to compiled code for", caller_pc); | |
1735 moop->print_short_name(tty); | |
1736 tty->print_cr(" to " INTPTR_FORMAT, entry_point); | |
1737 } | |
1738 // assert is too strong could also be resolve destinations. | |
1739 // assert(InlineCacheBuffer::contains(destination) || VtableStubs::contains(destination), "must be"); | |
1740 } | |
1741 } else { | |
1742 if (TraceCallFixup) { | |
1204 | 1743 tty->print("already patched callsite at " INTPTR_FORMAT " to compiled code for", caller_pc); |
0 | 1744 moop->print_short_name(tty); |
1745 tty->print_cr(" to " INTPTR_FORMAT, entry_point); | |
1746 } | |
1747 } | |
1748 } | |
1749 } | |
1750 IRT_END | |
1751 | |
1752 | |
1753 // same as JVM_Arraycopy, but called directly from compiled code | |
1754 JRT_ENTRY(void, SharedRuntime::slow_arraycopy_C(oopDesc* src, jint src_pos, | |
1755 oopDesc* dest, jint dest_pos, | |
1756 jint length, | |
1757 JavaThread* thread)) { | |
1758 #ifndef PRODUCT | |
1759 _slow_array_copy_ctr++; | |
1760 #endif | |
1761 // Check if we have null pointers | |
1762 if (src == NULL || dest == NULL) { | |
1763 THROW(vmSymbols::java_lang_NullPointerException()); | |
1764 } | |
1765 // Do the copy. The casts to arrayOop are necessary to the copy_array API, | |
1766 // even though the copy_array API also performs dynamic checks to ensure | |
1767 // that src and dest are truly arrays (and are conformable). | |
1768 // The copy_array mechanism is awkward and could be removed, but | |
1769 // the compilers don't call this function except as a last resort, | |
1770 // so it probably doesn't matter. | |
1771 Klass::cast(src->klass())->copy_array((arrayOopDesc*)src, src_pos, | |
1772 (arrayOopDesc*)dest, dest_pos, | |
1773 length, thread); | |
1774 } | |
1775 JRT_END | |
1776 | |
1777 char* SharedRuntime::generate_class_cast_message( | |
1778 JavaThread* thread, const char* objName) { | |
1779 | |
1780 // Get target class name from the checkcast instruction | |
1781 vframeStream vfst(thread, true); | |
1782 assert(!vfst.at_end(), "Java frame must exist"); | |
2142 | 1783 Bytecode_checkcast cc(vfst.method(), vfst.method()->bcp_from(vfst.bci())); |
0 | 1784 Klass* targetKlass = Klass::cast(vfst.method()->constants()->klass_at( |
2142 | 1785 cc.index(), thread)); |
0 | 1786 return generate_class_cast_message(objName, targetKlass->external_name()); |
1787 } | |
1788 | |
710 | 1789 char* SharedRuntime::generate_wrong_method_type_message(JavaThread* thread, |
1790 oopDesc* required, | |
1791 oopDesc* actual) { | |
1793
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1792 if (TraceMethodHandles) { |
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1793 tty->print_cr("WrongMethodType thread="PTR_FORMAT" req="PTR_FORMAT" act="PTR_FORMAT"", |
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1794 thread, required, actual); |
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1795 } |
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1796 assert(EnableInvokeDynamic, ""); |
710 | 1797 oop singleKlass = wrong_method_type_is_for_single_argument(thread, required); |
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1798 char* message = NULL; |
710 | 1799 if (singleKlass != NULL) { |
1800 const char* objName = "argument or return value"; | |
1801 if (actual != NULL) { | |
1802 // be flexible about the junk passed in: | |
1803 klassOop ak = (actual->is_klass() | |
1804 ? (klassOop)actual | |
1805 : actual->klass()); | |
1806 objName = Klass::cast(ak)->external_name(); | |
1807 } | |
1808 Klass* targetKlass = Klass::cast(required->is_klass() | |
1809 ? (klassOop)required | |
1810 : java_lang_Class::as_klassOop(required)); | |
1793
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1811 message = generate_class_cast_message(objName, targetKlass->external_name()); |
710 | 1812 } else { |
1813 // %%% need to get the MethodType string, without messing around too much | |
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1814 const char* desc = NULL; |
710 | 1815 // Get a signature from the invoke instruction |
1816 const char* mhName = "method handle"; | |
1817 const char* targetType = "the required signature"; | |
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1818 int targetArity = -1, mhArity = -1; |
710 | 1819 vframeStream vfst(thread, true); |
1820 if (!vfst.at_end()) { | |
2142 | 1821 Bytecode_invoke call(vfst.method(), vfst.bci()); |
710 | 1822 methodHandle target; |
1823 { | |
1824 EXCEPTION_MARK; | |
2142 | 1825 target = call.static_target(THREAD); |
710 | 1826 if (HAS_PENDING_EXCEPTION) { CLEAR_PENDING_EXCEPTION; } |
1827 } | |
1828 if (target.not_null() | |
1829 && target->is_method_handle_invoke() | |
1830 && required == target->method_handle_type()) { | |
1831 targetType = target->signature()->as_C_string(); | |
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1832 targetArity = ArgumentCount(target->signature()).size(); |
710 | 1833 } |
1834 } | |
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1835 KlassHandle kignore; int dmf_flags = 0; |
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1836 methodHandle actual_method = MethodHandles::decode_method(actual, kignore, dmf_flags); |
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1837 if ((dmf_flags & ~(MethodHandles::_dmf_has_receiver | |
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1838 MethodHandles::_dmf_does_dispatch | |
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1839 MethodHandles::_dmf_from_interface)) != 0) |
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1840 actual_method = methodHandle(); // MH does extra binds, drops, etc. |
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1841 bool has_receiver = ((dmf_flags & MethodHandles::_dmf_has_receiver) != 0); |
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1842 if (actual_method.not_null()) { |
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1843 mhName = actual_method->signature()->as_C_string(); |
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1844 mhArity = ArgumentCount(actual_method->signature()).size(); |
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1845 if (!actual_method->is_static()) mhArity += 1; |
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1846 } else if (java_lang_invoke_MethodHandle::is_instance(actual)) { |
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1847 oopDesc* mhType = java_lang_invoke_MethodHandle::type(actual); |
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1848 mhArity = java_lang_invoke_MethodType::ptype_count(mhType); |
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1849 stringStream st; |
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1850 java_lang_invoke_MethodType::print_signature(mhType, &st); |
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1851 mhName = st.as_string(); |
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1852 } |
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1853 if (targetArity != -1 && targetArity != mhArity) { |
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1854 if (has_receiver && targetArity == mhArity-1) |
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1855 desc = " cannot be called without a receiver argument as "; |
710 | 1856 else |
2461
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1857 desc = " cannot be called with a different arity as "; |
710 | 1858 } |
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1859 message = generate_class_cast_message(mhName, targetType, |
2461
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1860 desc != NULL ? desc : |
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1861 " cannot be called as "); |
710 | 1862 } |
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1863 if (TraceMethodHandles) { |
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1864 tty->print_cr("WrongMethodType => message=%s", message); |
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1865 } |
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1866 return message; |
710 | 1867 } |
1868 | |
1869 oop SharedRuntime::wrong_method_type_is_for_single_argument(JavaThread* thr, | |
1870 oopDesc* required) { | |
1871 if (required == NULL) return NULL; | |
1142 | 1872 if (required->klass() == SystemDictionary::Class_klass()) |
710 | 1873 return required; |
1874 if (required->is_klass()) | |
1875 return Klass::cast(klassOop(required))->java_mirror(); | |
1876 return NULL; | |
1877 } | |
1878 | |
1879 | |
0 | 1880 char* SharedRuntime::generate_class_cast_message( |
710 | 1881 const char* objName, const char* targetKlassName, const char* desc) { |
0 | 1882 size_t msglen = strlen(objName) + strlen(desc) + strlen(targetKlassName) + 1; |
1883 | |
53 | 1884 char* message = NEW_RESOURCE_ARRAY(char, msglen); |
0 | 1885 if (NULL == message) { |
53 | 1886 // Shouldn't happen, but don't cause even more problems if it does |
0 | 1887 message = const_cast<char*>(objName); |
1888 } else { | |
1889 jio_snprintf(message, msglen, "%s%s%s", objName, desc, targetKlassName); | |
1890 } | |
1891 return message; | |
1892 } | |
1893 | |
1894 JRT_LEAF(void, SharedRuntime::reguard_yellow_pages()) | |
1895 (void) JavaThread::current()->reguard_stack(); | |
1896 JRT_END | |
1897 | |
1898 | |
1899 // Handles the uncommon case in locking, i.e., contention or an inflated lock. | |
1900 #ifndef PRODUCT | |
1901 int SharedRuntime::_monitor_enter_ctr=0; | |
1902 #endif | |
1903 JRT_ENTRY_NO_ASYNC(void, SharedRuntime::complete_monitor_locking_C(oopDesc* _obj, BasicLock* lock, JavaThread* thread)) | |
1904 oop obj(_obj); | |
1905 #ifndef PRODUCT | |
1906 _monitor_enter_ctr++; // monitor enter slow | |
1907 #endif | |
1908 if (PrintBiasedLockingStatistics) { | |
1909 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); | |
1910 } | |
1911 Handle h_obj(THREAD, obj); | |
1912 if (UseBiasedLocking) { | |
1913 // Retry fast entry if bias is revoked to avoid unnecessary inflation | |
1914 ObjectSynchronizer::fast_enter(h_obj, lock, true, CHECK); | |
1915 } else { | |
1916 ObjectSynchronizer::slow_enter(h_obj, lock, CHECK); | |
1917 } | |
1918 assert(!HAS_PENDING_EXCEPTION, "Should have no exception here"); | |
1919 JRT_END | |
1920 | |
1921 #ifndef PRODUCT | |
1922 int SharedRuntime::_monitor_exit_ctr=0; | |
1923 #endif | |
1924 // Handles the uncommon cases of monitor unlocking in compiled code | |
1925 JRT_LEAF(void, SharedRuntime::complete_monitor_unlocking_C(oopDesc* _obj, BasicLock* lock)) | |
1926 oop obj(_obj); | |
1927 #ifndef PRODUCT | |
1928 _monitor_exit_ctr++; // monitor exit slow | |
1929 #endif | |
1930 Thread* THREAD = JavaThread::current(); | |
1931 // I'm not convinced we need the code contained by MIGHT_HAVE_PENDING anymore | |
1932 // testing was unable to ever fire the assert that guarded it so I have removed it. | |
1933 assert(!HAS_PENDING_EXCEPTION, "Do we need code below anymore?"); | |
1934 #undef MIGHT_HAVE_PENDING | |
1935 #ifdef MIGHT_HAVE_PENDING | |
1936 // Save and restore any pending_exception around the exception mark. | |
1937 // While the slow_exit must not throw an exception, we could come into | |
1938 // this routine with one set. | |
1939 oop pending_excep = NULL; | |
1940 const char* pending_file; | |
1941 int pending_line; | |
1942 if (HAS_PENDING_EXCEPTION) { | |
1943 pending_excep = PENDING_EXCEPTION; | |
1944 pending_file = THREAD->exception_file(); | |
1945 pending_line = THREAD->exception_line(); | |
1946 CLEAR_PENDING_EXCEPTION; | |
1947 } | |
1948 #endif /* MIGHT_HAVE_PENDING */ | |
1949 | |
1950 { | |
1951 // Exit must be non-blocking, and therefore no exceptions can be thrown. | |
1952 EXCEPTION_MARK; | |
1953 ObjectSynchronizer::slow_exit(obj, lock, THREAD); | |
1954 } | |
1955 | |
1956 #ifdef MIGHT_HAVE_PENDING | |
1957 if (pending_excep != NULL) { | |
1958 THREAD->set_pending_exception(pending_excep, pending_file, pending_line); | |
1959 } | |
1960 #endif /* MIGHT_HAVE_PENDING */ | |
1961 JRT_END | |
1962 | |
1963 #ifndef PRODUCT | |
1964 | |
1965 void SharedRuntime::print_statistics() { | |
1966 ttyLocker ttyl; | |
1967 if (xtty != NULL) xtty->head("statistics type='SharedRuntime'"); | |
1968 | |
1969 if (_monitor_enter_ctr ) tty->print_cr("%5d monitor enter slow", _monitor_enter_ctr); | |
1970 if (_monitor_exit_ctr ) tty->print_cr("%5d monitor exit slow", _monitor_exit_ctr); | |
1971 if (_throw_null_ctr) tty->print_cr("%5d implicit null throw", _throw_null_ctr); | |
1972 | |
1973 SharedRuntime::print_ic_miss_histogram(); | |
1974 | |
1975 if (CountRemovableExceptions) { | |
1976 if (_nof_removable_exceptions > 0) { | |
1977 Unimplemented(); // this counter is not yet incremented | |
1978 tty->print_cr("Removable exceptions: %d", _nof_removable_exceptions); | |
1979 } | |
1980 } | |
1981 | |
1982 // Dump the JRT_ENTRY counters | |
1983 if( _new_instance_ctr ) tty->print_cr("%5d new instance requires GC", _new_instance_ctr); | |
1984 if( _new_array_ctr ) tty->print_cr("%5d new array requires GC", _new_array_ctr); | |
1985 if( _multi1_ctr ) tty->print_cr("%5d multianewarray 1 dim", _multi1_ctr); | |
1986 if( _multi2_ctr ) tty->print_cr("%5d multianewarray 2 dim", _multi2_ctr); | |
1987 if( _multi3_ctr ) tty->print_cr("%5d multianewarray 3 dim", _multi3_ctr); | |
1988 if( _multi4_ctr ) tty->print_cr("%5d multianewarray 4 dim", _multi4_ctr); | |
1989 if( _multi5_ctr ) tty->print_cr("%5d multianewarray 5 dim", _multi5_ctr); | |
1990 | |
1991 tty->print_cr("%5d inline cache miss in compiled", _ic_miss_ctr ); | |
1992 tty->print_cr("%5d wrong method", _wrong_method_ctr ); | |
1993 tty->print_cr("%5d unresolved static call site", _resolve_static_ctr ); | |
1994 tty->print_cr("%5d unresolved virtual call site", _resolve_virtual_ctr ); | |
1995 tty->print_cr("%5d unresolved opt virtual call site", _resolve_opt_virtual_ctr ); | |
1996 | |
1997 if( _mon_enter_stub_ctr ) tty->print_cr("%5d monitor enter stub", _mon_enter_stub_ctr ); | |
1998 if( _mon_exit_stub_ctr ) tty->print_cr("%5d monitor exit stub", _mon_exit_stub_ctr ); | |
1999 if( _mon_enter_ctr ) tty->print_cr("%5d monitor enter slow", _mon_enter_ctr ); | |
2000 if( _mon_exit_ctr ) tty->print_cr("%5d monitor exit slow", _mon_exit_ctr ); | |
2001 if( _partial_subtype_ctr) tty->print_cr("%5d slow partial subtype", _partial_subtype_ctr ); | |
2002 if( _jbyte_array_copy_ctr ) tty->print_cr("%5d byte array copies", _jbyte_array_copy_ctr ); | |
2003 if( _jshort_array_copy_ctr ) tty->print_cr("%5d short array copies", _jshort_array_copy_ctr ); | |
2004 if( _jint_array_copy_ctr ) tty->print_cr("%5d int array copies", _jint_array_copy_ctr ); | |
2005 if( _jlong_array_copy_ctr ) tty->print_cr("%5d long array copies", _jlong_array_copy_ctr ); | |
2006 if( _oop_array_copy_ctr ) tty->print_cr("%5d oop array copies", _oop_array_copy_ctr ); | |
2007 if( _checkcast_array_copy_ctr ) tty->print_cr("%5d checkcast array copies", _checkcast_array_copy_ctr ); | |
2008 if( _unsafe_array_copy_ctr ) tty->print_cr("%5d unsafe array copies", _unsafe_array_copy_ctr ); | |
2009 if( _generic_array_copy_ctr ) tty->print_cr("%5d generic array copies", _generic_array_copy_ctr ); | |
2010 if( _slow_array_copy_ctr ) tty->print_cr("%5d slow array copies", _slow_array_copy_ctr ); | |
2011 if( _find_handler_ctr ) tty->print_cr("%5d find exception handler", _find_handler_ctr ); | |
2012 if( _rethrow_ctr ) tty->print_cr("%5d rethrow handler", _rethrow_ctr ); | |
2013 | |
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2014 AdapterHandlerLibrary::print_statistics(); |
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2015 |
0 | 2016 if (xtty != NULL) xtty->tail("statistics"); |
2017 } | |
2018 | |
2019 inline double percent(int x, int y) { | |
2020 return 100.0 * x / MAX2(y, 1); | |
2021 } | |
2022 | |
2023 class MethodArityHistogram { | |
2024 public: | |
2025 enum { MAX_ARITY = 256 }; | |
2026 private: | |
2027 static int _arity_histogram[MAX_ARITY]; // histogram of #args | |
2028 static int _size_histogram[MAX_ARITY]; // histogram of arg size in words | |
2029 static int _max_arity; // max. arity seen | |
2030 static int _max_size; // max. arg size seen | |
2031 | |
2032 static void add_method_to_histogram(nmethod* nm) { | |
2033 methodOop m = nm->method(); | |
2034 ArgumentCount args(m->signature()); | |
2035 int arity = args.size() + (m->is_static() ? 0 : 1); | |
2036 int argsize = m->size_of_parameters(); | |
2037 arity = MIN2(arity, MAX_ARITY-1); | |
2038 argsize = MIN2(argsize, MAX_ARITY-1); | |
2039 int count = nm->method()->compiled_invocation_count(); | |
2040 _arity_histogram[arity] += count; | |
2041 _size_histogram[argsize] += count; | |
2042 _max_arity = MAX2(_max_arity, arity); | |
2043 _max_size = MAX2(_max_size, argsize); | |
2044 } | |
2045 | |
2046 void print_histogram_helper(int n, int* histo, const char* name) { | |
2047 const int N = MIN2(5, n); | |
2048 tty->print_cr("\nHistogram of call arity (incl. rcvr, calls to compiled methods only):"); | |
2049 double sum = 0; | |
2050 double weighted_sum = 0; | |
2051 int i; | |
2052 for (i = 0; i <= n; i++) { sum += histo[i]; weighted_sum += i*histo[i]; } | |
2053 double rest = sum; | |
2054 double percent = sum / 100; | |
2055 for (i = 0; i <= N; i++) { | |
2056 rest -= histo[i]; | |
2057 tty->print_cr("%4d: %7d (%5.1f%%)", i, histo[i], histo[i] / percent); | |
2058 } | |
2059 tty->print_cr("rest: %7d (%5.1f%%))", (int)rest, rest / percent); | |
2060 tty->print_cr("(avg. %s = %3.1f, max = %d)", name, weighted_sum / sum, n); | |
2061 } | |
2062 | |
2063 void print_histogram() { | |
2064 tty->print_cr("\nHistogram of call arity (incl. rcvr, calls to compiled methods only):"); | |
2065 print_histogram_helper(_max_arity, _arity_histogram, "arity"); | |
2066 tty->print_cr("\nSame for parameter size (in words):"); | |
2067 print_histogram_helper(_max_size, _size_histogram, "size"); | |
2068 tty->cr(); | |
2069 } | |
2070 | |
2071 public: | |
2072 MethodArityHistogram() { | |
2073 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
2074 _max_arity = _max_size = 0; | |
2075 for (int i = 0; i < MAX_ARITY; i++) _arity_histogram[i] = _size_histogram [i] = 0; | |
2076 CodeCache::nmethods_do(add_method_to_histogram); | |
2077 print_histogram(); | |
2078 } | |
2079 }; | |
2080 | |
2081 int MethodArityHistogram::_arity_histogram[MethodArityHistogram::MAX_ARITY]; | |
2082 int MethodArityHistogram::_size_histogram[MethodArityHistogram::MAX_ARITY]; | |
2083 int MethodArityHistogram::_max_arity; | |
2084 int MethodArityHistogram::_max_size; | |
2085 | |
2086 void SharedRuntime::print_call_statistics(int comp_total) { | |
2087 tty->print_cr("Calls from compiled code:"); | |
2088 int total = _nof_normal_calls + _nof_interface_calls + _nof_static_calls; | |
2089 int mono_c = _nof_normal_calls - _nof_optimized_calls - _nof_megamorphic_calls; | |
2090 int mono_i = _nof_interface_calls - _nof_optimized_interface_calls - _nof_megamorphic_interface_calls; | |
2091 tty->print_cr("\t%9d (%4.1f%%) total non-inlined ", total, percent(total, total)); | |
2092 tty->print_cr("\t%9d (%4.1f%%) virtual calls ", _nof_normal_calls, percent(_nof_normal_calls, total)); | |
2093 tty->print_cr("\t %9d (%3.0f%%) inlined ", _nof_inlined_calls, percent(_nof_inlined_calls, _nof_normal_calls)); | |
2094 tty->print_cr("\t %9d (%3.0f%%) optimized ", _nof_optimized_calls, percent(_nof_optimized_calls, _nof_normal_calls)); | |
2095 tty->print_cr("\t %9d (%3.0f%%) monomorphic ", mono_c, percent(mono_c, _nof_normal_calls)); | |
2096 tty->print_cr("\t %9d (%3.0f%%) megamorphic ", _nof_megamorphic_calls, percent(_nof_megamorphic_calls, _nof_normal_calls)); | |
2097 tty->print_cr("\t%9d (%4.1f%%) interface calls ", _nof_interface_calls, percent(_nof_interface_calls, total)); | |
2098 tty->print_cr("\t %9d (%3.0f%%) inlined ", _nof_inlined_interface_calls, percent(_nof_inlined_interface_calls, _nof_interface_calls)); | |
2099 tty->print_cr("\t %9d (%3.0f%%) optimized ", _nof_optimized_interface_calls, percent(_nof_optimized_interface_calls, _nof_interface_calls)); | |
2100 tty->print_cr("\t %9d (%3.0f%%) monomorphic ", mono_i, percent(mono_i, _nof_interface_calls)); | |
2101 tty->print_cr("\t %9d (%3.0f%%) megamorphic ", _nof_megamorphic_interface_calls, percent(_nof_megamorphic_interface_calls, _nof_interface_calls)); | |
2102 tty->print_cr("\t%9d (%4.1f%%) static/special calls", _nof_static_calls, percent(_nof_static_calls, total)); | |
2103 tty->print_cr("\t %9d (%3.0f%%) inlined ", _nof_inlined_static_calls, percent(_nof_inlined_static_calls, _nof_static_calls)); | |
2104 tty->cr(); | |
2105 tty->print_cr("Note 1: counter updates are not MT-safe."); | |
2106 tty->print_cr("Note 2: %% in major categories are relative to total non-inlined calls;"); | |
2107 tty->print_cr(" %% in nested categories are relative to their category"); | |
2108 tty->print_cr(" (and thus add up to more than 100%% with inlining)"); | |
2109 tty->cr(); | |
2110 | |
2111 MethodArityHistogram h; | |
2112 } | |
2113 #endif | |
2114 | |
2115 | |
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2116 // A simple wrapper class around the calling convention information |
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2117 // that allows sharing of adapters for the same calling convention. |
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2118 class AdapterFingerPrint : public CHeapObj { |
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2119 private: |
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2120 union { |
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2121 int _compact[3]; |
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2122 int* _fingerprint; |
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2123 } _value; |
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2124 int _length; // A negative length indicates the fingerprint is in the compact form, |
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2125 // Otherwise _value._fingerprint is the array. |
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2126 |
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2127 // Remap BasicTypes that are handled equivalently by the adapters. |
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2128 // These are correct for the current system but someday it might be |
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2129 // necessary to make this mapping platform dependent. |
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2130 static BasicType adapter_encoding(BasicType in) { |
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2131 assert((~0xf & in) == 0, "must fit in 4 bits"); |
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2132 switch(in) { |
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2133 case T_BOOLEAN: |
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2134 case T_BYTE: |
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2135 case T_SHORT: |
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2136 case T_CHAR: |
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2137 // There are all promoted to T_INT in the calling convention |
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2138 return T_INT; |
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2139 |
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2140 case T_OBJECT: |
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2141 case T_ARRAY: |
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2142 #ifdef _LP64 |
1506 | 2143 return T_LONG; |
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2144 #else |
1506 | 2145 return T_INT; |
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2146 #endif |
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2147 |
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2148 case T_INT: |
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2149 case T_LONG: |
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2150 case T_FLOAT: |
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never
parents:
1205
diff
changeset
|
2151 case T_DOUBLE: |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2152 case T_VOID: |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2153 return in; |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2154 |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2155 default: |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2156 ShouldNotReachHere(); |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2157 return T_CONFLICT; |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2158 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2159 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2160 |
1207
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2161 public: |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2162 AdapterFingerPrint(int total_args_passed, BasicType* sig_bt) { |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2163 // The fingerprint is based on the BasicType signature encoded |
3841
0f34fdee809e
7071427: AdapterFingerPrint can hold 8 entries per int
never
parents:
3781
diff
changeset
|
2164 // into an array of ints with eight entries per int. |
1207
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
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parents:
1205
diff
changeset
|
2165 int* ptr; |
3841
0f34fdee809e
7071427: AdapterFingerPrint can hold 8 entries per int
never
parents:
3781
diff
changeset
|
2166 int len = (total_args_passed + 7) >> 3; |
1207
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2167 if (len <= (int)(sizeof(_value._compact) / sizeof(int))) { |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2168 _value._compact[0] = _value._compact[1] = _value._compact[2] = 0; |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2169 // Storing the signature encoded as signed chars hits about 98% |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2170 // of the time. |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2171 _length = -len; |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2172 ptr = _value._compact; |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2173 } else { |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2174 _length = len; |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2175 _value._fingerprint = NEW_C_HEAP_ARRAY(int, _length); |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2176 ptr = _value._fingerprint; |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2177 } |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2178 |
3841
0f34fdee809e
7071427: AdapterFingerPrint can hold 8 entries per int
never
parents:
3781
diff
changeset
|
2179 // Now pack the BasicTypes with 8 per int |
1207
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2180 int sig_index = 0; |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2181 for (int index = 0; index < len; index++) { |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2182 int value = 0; |
3841
0f34fdee809e
7071427: AdapterFingerPrint can hold 8 entries per int
never
parents:
3781
diff
changeset
|
2183 for (int byte = 0; byte < 8; byte++) { |
1207
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2184 if (sig_index < total_args_passed) { |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2185 value = (value << 4) | adapter_encoding(sig_bt[sig_index++]); |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2186 } |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2187 } |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2188 ptr[index] = value; |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2189 } |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2190 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2191 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2192 ~AdapterFingerPrint() { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2193 if (_length > 0) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2194 FREE_C_HEAP_ARRAY(int, _value._fingerprint); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2195 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2196 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2197 |
1207
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2198 int value(int index) { |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2199 if (_length < 0) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2200 return _value._compact[index]; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2201 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2202 return _value._fingerprint[index]; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2203 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2204 int length() { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2205 if (_length < 0) return -_length; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2206 return _length; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2207 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2208 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2209 bool is_compact() { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2210 return _length <= 0; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2211 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2212 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2213 unsigned int compute_hash() { |
1207
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2214 int hash = 0; |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2215 for (int i = 0; i < length(); i++) { |
1207
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2216 int v = value(i); |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2217 hash = (hash << 8) ^ v ^ (hash >> 5); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2218 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2219 return (unsigned int)hash; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2220 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2221 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2222 const char* as_string() { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2223 stringStream st; |
3841
0f34fdee809e
7071427: AdapterFingerPrint can hold 8 entries per int
never
parents:
3781
diff
changeset
|
2224 st.print("0x"); |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2225 for (int i = 0; i < length(); i++) { |
3841
0f34fdee809e
7071427: AdapterFingerPrint can hold 8 entries per int
never
parents:
3781
diff
changeset
|
2226 st.print("%08x", value(i)); |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2227 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2228 return st.as_string(); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2229 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2230 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2231 bool equals(AdapterFingerPrint* other) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2232 if (other->_length != _length) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2233 return false; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2234 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2235 if (_length < 0) { |
1207
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2236 return _value._compact[0] == other->_value._compact[0] && |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2237 _value._compact[1] == other->_value._compact[1] && |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2238 _value._compact[2] == other->_value._compact[2]; |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2239 } else { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2240 for (int i = 0; i < _length; i++) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2241 if (_value._fingerprint[i] != other->_value._fingerprint[i]) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2242 return false; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2243 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2244 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2245 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2246 return true; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2247 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2248 }; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2249 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2250 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2251 // A hashtable mapping from AdapterFingerPrints to AdapterHandlerEntries |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2252 class AdapterHandlerTable : public BasicHashtable { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2253 friend class AdapterHandlerTableIterator; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2254 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2255 private: |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2256 |
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
kvn
parents:
1257
diff
changeset
|
2257 #ifndef PRODUCT |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2258 static int _lookups; // number of calls to lookup |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2259 static int _buckets; // number of buckets checked |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2260 static int _equals; // number of buckets checked with matching hash |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2261 static int _hits; // number of successful lookups |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2262 static int _compact; // number of equals calls with compact signature |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2263 #endif |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2264 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2265 AdapterHandlerEntry* bucket(int i) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2266 return (AdapterHandlerEntry*)BasicHashtable::bucket(i); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2267 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2268 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2269 public: |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2270 AdapterHandlerTable() |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2271 : BasicHashtable(293, sizeof(AdapterHandlerEntry)) { } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2272 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2273 // Create a new entry suitable for insertion in the table |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2274 AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry, address c2i_unverified_entry) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2275 AdapterHandlerEntry* entry = (AdapterHandlerEntry*)BasicHashtable::new_entry(fingerprint->compute_hash()); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2276 entry->init(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2277 return entry; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2278 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2279 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2280 // Insert an entry into the table |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2281 void add(AdapterHandlerEntry* entry) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2282 int index = hash_to_index(entry->hash()); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2283 add_entry(index, entry); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2284 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2285 |
1207
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2286 void free_entry(AdapterHandlerEntry* entry) { |
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2287 entry->deallocate(); |
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|
2288 BasicHashtable::free_entry(entry); |
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|
2289 } |
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|
2290 |
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2291 // Find a entry with the same fingerprint if it exists |
1207
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2292 AdapterHandlerEntry* lookup(int total_args_passed, BasicType* sig_bt) { |
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2293 NOT_PRODUCT(_lookups++); |
1207
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|
2294 AdapterFingerPrint fp(total_args_passed, sig_bt); |
1187
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|
2295 unsigned int hash = fp.compute_hash(); |
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|
2296 int index = hash_to_index(hash); |
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|
2297 for (AdapterHandlerEntry* e = bucket(index); e != NULL; e = e->next()) { |
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2298 NOT_PRODUCT(_buckets++); |
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2299 if (e->hash() == hash) { |
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|
2300 NOT_PRODUCT(_equals++); |
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2301 if (fp.equals(e->fingerprint())) { |
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|
2302 #ifndef PRODUCT |
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2303 if (fp.is_compact()) _compact++; |
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2304 _hits++; |
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|
2305 #endif |
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|
2306 return e; |
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|
2307 } |
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|
2308 } |
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|
2309 } |
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|
2310 return NULL; |
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|
2311 } |
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|
2312 |
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|
2313 #ifndef PRODUCT |
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|
2314 void print_statistics() { |
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|
2315 ResourceMark rm; |
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|
2316 int longest = 0; |
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|
2317 int empty = 0; |
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|
2318 int total = 0; |
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|
2319 int nonempty = 0; |
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|
2320 for (int index = 0; index < table_size(); index++) { |
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|
2321 int count = 0; |
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|
2322 for (AdapterHandlerEntry* e = bucket(index); e != NULL; e = e->next()) { |
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|
2323 count++; |
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|
2324 } |
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|
2325 if (count != 0) nonempty++; |
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|
2326 if (count == 0) empty++; |
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|
2327 if (count > longest) longest = count; |
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|
2328 total += count; |
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|
2329 } |
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|
2330 tty->print_cr("AdapterHandlerTable: empty %d longest %d total %d average %f", |
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2331 empty, longest, total, total / (double)nonempty); |
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2332 tty->print_cr("AdapterHandlerTable: lookups %d buckets %d equals %d hits %d compact %d", |
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2333 _lookups, _buckets, _equals, _hits, _compact); |
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|
2334 } |
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|
2335 #endif |
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|
2336 }; |
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|
2337 |
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|
2338 |
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|
2339 #ifndef PRODUCT |
1187
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|
2340 |
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|
2341 int AdapterHandlerTable::_lookups; |
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|
2342 int AdapterHandlerTable::_buckets; |
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|
2343 int AdapterHandlerTable::_equals; |
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|
2344 int AdapterHandlerTable::_hits; |
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|
2345 int AdapterHandlerTable::_compact; |
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|
2346 |
1681
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bobv
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diff
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|
2347 #endif |
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diff
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|
2348 |
1187
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|
2349 class AdapterHandlerTableIterator : public StackObj { |
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|
2350 private: |
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|
2351 AdapterHandlerTable* _table; |
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|
2352 int _index; |
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|
2353 AdapterHandlerEntry* _current; |
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|
2354 |
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|
2355 void scan() { |
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|
2356 while (_index < _table->table_size()) { |
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|
2357 AdapterHandlerEntry* a = _table->bucket(_index); |
1564 | 2358 _index++; |
1187
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2359 if (a != NULL) { |
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|
2360 _current = a; |
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|
2361 return; |
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|
2362 } |
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|
2363 } |
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|
2364 } |
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|
2365 |
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|
2366 public: |
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|
2367 AdapterHandlerTableIterator(AdapterHandlerTable* table): _table(table), _index(0), _current(NULL) { |
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|
2368 scan(); |
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|
2369 } |
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|
2370 bool has_next() { |
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|
2371 return _current != NULL; |
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|
2372 } |
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|
2373 AdapterHandlerEntry* next() { |
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|
2374 if (_current != NULL) { |
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|
2375 AdapterHandlerEntry* result = _current; |
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|
2376 _current = _current->next(); |
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|
2377 if (_current == NULL) scan(); |
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|
2378 return result; |
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|
2379 } else { |
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|
2380 return NULL; |
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|
2381 } |
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|
2382 } |
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|
2383 }; |
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|
2384 |
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|
2385 |
0 | 2386 // --------------------------------------------------------------------------- |
2387 // Implementation of AdapterHandlerLibrary | |
1187
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|
2388 AdapterHandlerTable* AdapterHandlerLibrary::_adapters = NULL; |
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|
2389 AdapterHandlerEntry* AdapterHandlerLibrary::_abstract_method_handler = NULL; |
0 | 2390 const int AdapterHandlerLibrary_size = 16*K; |
742
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|
2391 BufferBlob* AdapterHandlerLibrary::_buffer = NULL; |
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|
2392 |
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|
2393 BufferBlob* AdapterHandlerLibrary::buffer_blob() { |
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|
2394 // Should be called only when AdapterHandlerLibrary_lock is active. |
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|
2395 if (_buffer == NULL) // Initialize lazily |
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|
2396 _buffer = BufferBlob::create("adapters", AdapterHandlerLibrary_size); |
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|
2397 return _buffer; |
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|
2398 } |
0 | 2399 |
2400 void AdapterHandlerLibrary::initialize() { | |
1187
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2401 if (_adapters != NULL) return; |
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|
2402 _adapters = new AdapterHandlerTable(); |
0 | 2403 |
2404 // Create a special handler for abstract methods. Abstract methods | |
2405 // are never compiled so an i2c entry is somewhat meaningless, but | |
2406 // fill it in with something appropriate just in case. Pass handle | |
2407 // wrong method for the c2i transitions. | |
2408 address wrong_method = SharedRuntime::get_handle_wrong_method_stub(); | |
1187
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2409 _abstract_method_handler = AdapterHandlerLibrary::new_entry(new AdapterFingerPrint(0, NULL), |
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|
2410 StubRoutines::throw_AbstractMethodError_entry(), |
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|
2411 wrong_method, wrong_method); |
0 | 2412 } |
2413 | |
1187
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|
2414 AdapterHandlerEntry* AdapterHandlerLibrary::new_entry(AdapterFingerPrint* fingerprint, |
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|
2415 address i2c_entry, |
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|
2416 address c2i_entry, |
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|
2417 address c2i_unverified_entry) { |
cf0685d550f1
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|
2418 return _adapters->new_entry(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry); |
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|
2419 } |
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|
2420 |
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|
2421 AdapterHandlerEntry* AdapterHandlerLibrary::get_adapter(methodHandle method) { |
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|
2422 // Use customized signature handler. Need to lock around updates to |
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|
2423 // the AdapterHandlerTable (it is not safe for concurrent readers |
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|
2424 // and a single writer: this could be fixed if it becomes a |
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|
2425 // problem). |
0 | 2426 |
2427 // Get the address of the ic_miss handlers before we grab the | |
2428 // AdapterHandlerLibrary_lock. This fixes bug 6236259 which | |
2429 // was caused by the initialization of the stubs happening | |
2430 // while we held the lock and then notifying jvmti while | |
2431 // holding it. This just forces the initialization to be a little | |
2432 // earlier. | |
2433 address ic_miss = SharedRuntime::get_ic_miss_stub(); | |
2434 assert(ic_miss != NULL, "must have handler"); | |
2435 | |
1187
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|
2436 ResourceMark rm; |
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2437 |
1748 | 2438 NOT_PRODUCT(int insts_size); |
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2439 AdapterBlob* B = NULL; |
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2440 AdapterHandlerEntry* entry = NULL; |
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2441 AdapterFingerPrint* fingerprint = NULL; |
0 | 2442 { |
2443 MutexLocker mu(AdapterHandlerLibrary_lock); | |
2444 // make sure data structure is initialized | |
2445 initialize(); | |
2446 | |
2447 if (method->is_abstract()) { | |
1187
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2448 return _abstract_method_handler; |
0 | 2449 } |
2450 | |
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2451 // Fill in the signature array, for the calling-convention call. |
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2452 int total_args_passed = method->size_of_parameters(); // All args on stack |
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2453 |
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2454 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_args_passed); |
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2455 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed); |
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2456 int i = 0; |
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2457 if (!method->is_static()) // Pass in receiver first |
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2458 sig_bt[i++] = T_OBJECT; |
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2459 for (SignatureStream ss(method->signature()); !ss.at_return_type(); ss.next()) { |
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2460 sig_bt[i++] = ss.type(); // Collect remaining bits of signature |
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2461 if (ss.type() == T_LONG || ss.type() == T_DOUBLE) |
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2462 sig_bt[i++] = T_VOID; // Longs & doubles take 2 Java slots |
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|
2463 } |
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2464 assert(i == total_args_passed, ""); |
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2465 |
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2466 // Lookup method signature's fingerprint |
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2467 entry = _adapters->lookup(total_args_passed, sig_bt); |
1187
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2468 |
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|
2469 #ifdef ASSERT |
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2470 AdapterHandlerEntry* shared_entry = NULL; |
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|
2471 if (VerifyAdapterSharing && entry != NULL) { |
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|
2472 shared_entry = entry; |
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2473 entry = NULL; |
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|
2474 } |
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|
2475 #endif |
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|
2476 |
1187
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2477 if (entry != NULL) { |
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2478 return entry; |
0 | 2479 } |
2480 | |
1207
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2481 // Get a description of the compiled java calling convention and the largest used (VMReg) stack slot usage |
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2482 int comp_args_on_stack = SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed, false); |
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2483 |
1187
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2484 // Make a C heap allocated version of the fingerprint to store in the adapter |
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2485 fingerprint = new AdapterFingerPrint(total_args_passed, sig_bt); |
1187
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2486 |
0 | 2487 // Create I2C & C2I handlers |
2488 | |
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2489 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache |
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2490 if (buf != NULL) { |
1748 | 2491 CodeBuffer buffer(buf); |
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2492 short buffer_locs[20]; |
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2493 buffer.insts()->initialize_shared_locs((relocInfo*)buffer_locs, |
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2494 sizeof(buffer_locs)/sizeof(relocInfo)); |
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|
2495 MacroAssembler _masm(&buffer); |
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|
2496 |
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2497 entry = SharedRuntime::generate_i2c2i_adapters(&_masm, |
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|
2498 total_args_passed, |
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|
2499 comp_args_on_stack, |
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2500 sig_bt, |
1187
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|
2501 regs, |
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|
2502 fingerprint); |
0 | 2503 |
1207
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|
2504 #ifdef ASSERT |
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|
2505 if (VerifyAdapterSharing) { |
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|
2506 if (shared_entry != NULL) { |
1748 | 2507 assert(shared_entry->compare_code(buf->code_begin(), buffer.insts_size(), total_args_passed, sig_bt), |
1207
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2508 "code must match"); |
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2509 // Release the one just created and return the original |
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|
2510 _adapters->free_entry(entry); |
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|
2511 return shared_entry; |
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2512 } else { |
1748 | 2513 entry->save_code(buf->code_begin(), buffer.insts_size(), total_args_passed, sig_bt); |
1207
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|
2514 } |
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|
2515 } |
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|
2516 #endif |
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|
2517 |
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2518 B = AdapterBlob::create(&buffer); |
1748 | 2519 NOT_PRODUCT(insts_size = buffer.insts_size()); |
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2520 } |
28 | 2521 if (B == NULL) { |
2522 // CodeCache is full, disable compilation | |
2523 // Ought to log this but compile log is only per compile thread | |
2524 // and we're some non descript Java thread. | |
1202 | 2525 MutexUnlocker mu(AdapterHandlerLibrary_lock); |
2526 CompileBroker::handle_full_code_cache(); | |
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2527 return NULL; // Out of CodeCache space |
28 | 2528 } |
1748 | 2529 entry->relocate(B->content_begin()); |
0 | 2530 #ifndef PRODUCT |
2531 // debugging suppport | |
2532 if (PrintAdapterHandlers) { | |
2533 tty->cr(); | |
1187
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2534 tty->print_cr("i2c argument handler #%d for: %s %s (fingerprint = %s, %d bytes generated)", |
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2535 _adapters->number_of_entries(), (method->is_static() ? "static" : "receiver"), |
1748 | 2536 method->signature()->as_C_string(), fingerprint->as_string(), insts_size ); |
0 | 2537 tty->print_cr("c2i argument handler starts at %p",entry->get_c2i_entry()); |
1748 | 2538 Disassembler::decode(entry->get_i2c_entry(), entry->get_i2c_entry() + insts_size); |
0 | 2539 } |
2540 #endif | |
2541 | |
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|
2542 _adapters->add(entry); |
0 | 2543 } |
2544 // Outside of the lock | |
2545 if (B != NULL) { | |
2546 char blob_id[256]; | |
2547 jio_snprintf(blob_id, | |
2548 sizeof(blob_id), | |
1187
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|
2549 "%s(%s)@" PTR_FORMAT, |
1299
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2550 B->name(), |
1187
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|
2551 fingerprint->as_string(), |
1748 | 2552 B->content_begin()); |
2553 Forte::register_stub(blob_id, B->content_begin(), B->content_end()); | |
0 | 2554 |
2555 if (JvmtiExport::should_post_dynamic_code_generated()) { | |
1748 | 2556 JvmtiExport::post_dynamic_code_generated(blob_id, B->content_begin(), B->content_end()); |
0 | 2557 } |
2558 } | |
1187
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|
2559 return entry; |
0 | 2560 } |
2561 | |
2562 void AdapterHandlerEntry::relocate(address new_base) { | |
2563 ptrdiff_t delta = new_base - _i2c_entry; | |
2564 _i2c_entry += delta; | |
2565 _c2i_entry += delta; | |
2566 _c2i_unverified_entry += delta; | |
2567 } | |
2568 | |
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|
2569 |
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|
2570 void AdapterHandlerEntry::deallocate() { |
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|
2571 delete _fingerprint; |
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|
2572 #ifdef ASSERT |
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|
2573 if (_saved_code) FREE_C_HEAP_ARRAY(unsigned char, _saved_code); |
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2574 if (_saved_sig) FREE_C_HEAP_ARRAY(Basictype, _saved_sig); |
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|
2575 #endif |
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|
2576 } |
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|
2577 |
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|
2578 |
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|
2579 #ifdef ASSERT |
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|
2580 // Capture the code before relocation so that it can be compared |
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|
2581 // against other versions. If the code is captured after relocation |
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2582 // then relative instructions won't be equivalent. |
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|
2583 void AdapterHandlerEntry::save_code(unsigned char* buffer, int length, int total_args_passed, BasicType* sig_bt) { |
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2584 _saved_code = NEW_C_HEAP_ARRAY(unsigned char, length); |
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|
2585 _code_length = length; |
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|
2586 memcpy(_saved_code, buffer, length); |
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|
2587 _total_args_passed = total_args_passed; |
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2588 _saved_sig = NEW_C_HEAP_ARRAY(BasicType, _total_args_passed); |
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2589 memcpy(_saved_sig, sig_bt, _total_args_passed * sizeof(BasicType)); |
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|
2590 } |
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|
2591 |
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2592 |
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2593 bool AdapterHandlerEntry::compare_code(unsigned char* buffer, int length, int total_args_passed, BasicType* sig_bt) { |
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2594 if (length != _code_length) { |
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|
2595 return false; |
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|
2596 } |
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|
2597 for (int i = 0; i < length; i++) { |
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2598 if (buffer[i] != _saved_code[i]) { |
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2599 return false; |
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|
2600 } |
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|
2601 } |
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2602 return true; |
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|
2603 } |
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2604 #endif |
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2605 |
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2606 |
0 | 2607 // Create a native wrapper for this native method. The wrapper converts the |
2608 // java compiled calling convention to the native convention, handlizes | |
2609 // arguments, and transitions to native. On return from the native we transition | |
2610 // back to java blocking if a safepoint is in progress. | |
2405
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2611 nmethod *AdapterHandlerLibrary::create_native_wrapper(methodHandle method, int compile_id) { |
0 | 2612 ResourceMark rm; |
2613 nmethod* nm = NULL; | |
2614 | |
2615 assert(method->has_native_function(), "must have something valid to call!"); | |
2616 | |
2617 { | |
2618 // perform the work while holding the lock, but perform any printing outside the lock | |
2619 MutexLocker mu(AdapterHandlerLibrary_lock); | |
2620 // See if somebody beat us to it | |
2621 nm = method->code(); | |
2622 if (nm) { | |
2623 return nm; | |
2624 } | |
2625 | |
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2626 ResourceMark rm; |
0 | 2627 |
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2628 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache |
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2629 if (buf != NULL) { |
1748 | 2630 CodeBuffer buffer(buf); |
742
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2631 double locs_buf[20]; |
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2632 buffer.insts()->initialize_shared_locs((relocInfo*)locs_buf, sizeof(locs_buf) / sizeof(relocInfo)); |
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2633 MacroAssembler _masm(&buffer); |
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2634 |
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2635 // Fill in the signature array, for the calling-convention call. |
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2636 int total_args_passed = method->size_of_parameters(); |
0 | 2637 |
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2638 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType,total_args_passed); |
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2639 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair,total_args_passed); |
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2640 int i=0; |
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2641 if( !method->is_static() ) // Pass in receiver first |
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2642 sig_bt[i++] = T_OBJECT; |
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2643 SignatureStream ss(method->signature()); |
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2644 for( ; !ss.at_return_type(); ss.next()) { |
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2645 sig_bt[i++] = ss.type(); // Collect remaining bits of signature |
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2646 if( ss.type() == T_LONG || ss.type() == T_DOUBLE ) |
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2647 sig_bt[i++] = T_VOID; // Longs & doubles take 2 Java slots |
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2648 } |
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2649 assert( i==total_args_passed, "" ); |
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2650 BasicType ret_type = ss.type(); |
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2651 |
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2652 // Now get the compiled-Java layout as input arguments |
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2653 int comp_args_on_stack; |
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2654 comp_args_on_stack = SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed, false); |
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2655 |
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2656 // Generate the compiled-to-native wrapper code |
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2657 nm = SharedRuntime::generate_native_wrapper(&_masm, |
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2658 method, |
2405
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2659 compile_id, |
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2660 total_args_passed, |
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2661 comp_args_on_stack, |
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2662 sig_bt,regs, |
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2663 ret_type); |
0 | 2664 } |
2665 } | |
2666 | |
2667 // Must unlock before calling set_code | |
1728
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2668 |
0 | 2669 // Install the generated code. |
2670 if (nm != NULL) { | |
2405
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2671 if (PrintCompilation) { |
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2672 ttyLocker ttyl; |
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2673 CompileTask::print_compilation(tty, nm, method->is_static() ? "(static)" : ""); |
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2674 } |
0 | 2675 method->set_code(method, nm); |
2676 nm->post_compiled_method_load_event(); | |
2677 } else { | |
2678 // CodeCache is full, disable compilation | |
1202 | 2679 CompileBroker::handle_full_code_cache(); |
0 | 2680 } |
2681 return nm; | |
2682 } | |
2683 | |
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2684 #ifdef HAVE_DTRACE_H |
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2685 // Create a dtrace nmethod for this method. The wrapper converts the |
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2686 // java compiled calling convention to the native convention, makes a dummy call |
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2687 // (actually nops for the size of the call instruction, which become a trap if |
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2688 // probe is enabled). The returns to the caller. Since this all looks like a |
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2689 // leaf no thread transition is needed. |
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2690 |
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2691 nmethod *AdapterHandlerLibrary::create_dtrace_nmethod(methodHandle method) { |
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2692 ResourceMark rm; |
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2693 nmethod* nm = NULL; |
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2694 |
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2695 if (PrintCompilation) { |
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2696 ttyLocker ttyl; |
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2697 tty->print("--- n%s "); |
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2698 method->print_short_name(tty); |
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2699 if (method->is_static()) { |
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2700 tty->print(" (static)"); |
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2701 } |
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2702 tty->cr(); |
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2703 } |
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2704 |
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2705 { |
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2706 // perform the work while holding the lock, but perform any printing |
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2707 // outside the lock |
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2708 MutexLocker mu(AdapterHandlerLibrary_lock); |
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2709 // See if somebody beat us to it |
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2710 nm = method->code(); |
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2711 if (nm) { |
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2712 return nm; |
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2713 } |
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2714 |
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2715 ResourceMark rm; |
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2716 |
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2717 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache |
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2718 if (buf != NULL) { |
1748 | 2719 CodeBuffer buffer(buf); |
742
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2720 // Need a few relocation entries |
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2721 double locs_buf[20]; |
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2722 buffer.insts()->initialize_shared_locs( |
116
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2723 (relocInfo*)locs_buf, sizeof(locs_buf) / sizeof(relocInfo)); |
742
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2724 MacroAssembler _masm(&buffer); |
116
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2725 |
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2726 // Generate the compiled-to-native wrapper code |
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2727 nm = SharedRuntime::generate_dtrace_nmethod(&_masm, method); |
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2728 } |
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2729 } |
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2730 return nm; |
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2731 } |
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2732 |
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2733 // the dtrace method needs to convert java lang string to utf8 string. |
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2734 void SharedRuntime::get_utf(oopDesc* src, address dst) { |
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2735 typeArrayOop jlsValue = java_lang_String::value(src); |
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2736 int jlsOffset = java_lang_String::offset(src); |
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2737 int jlsLen = java_lang_String::length(src); |
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2738 jchar* jlsPos = (jlsLen == 0) ? NULL : |
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2739 jlsValue->char_at_addr(jlsOffset); |
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2740 assert(typeArrayKlass::cast(jlsValue->klass())->element_type() == T_CHAR, "compressed string"); |
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2741 (void) UNICODE::as_utf8(jlsPos, jlsLen, (char *)dst, max_dtrace_string_size); |
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2742 } |
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2743 #endif // ndef HAVE_DTRACE_H |
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2744 |
0 | 2745 // ------------------------------------------------------------------------- |
2746 // Java-Java calling convention | |
2747 // (what you use when Java calls Java) | |
2748 | |
2749 //------------------------------name_for_receiver---------------------------------- | |
2750 // For a given signature, return the VMReg for parameter 0. | |
2751 VMReg SharedRuntime::name_for_receiver() { | |
2752 VMRegPair regs; | |
2753 BasicType sig_bt = T_OBJECT; | |
2754 (void) java_calling_convention(&sig_bt, ®s, 1, true); | |
2755 // Return argument 0 register. In the LP64 build pointers | |
2756 // take 2 registers, but the VM wants only the 'main' name. | |
2757 return regs.first(); | |
2758 } | |
2759 | |
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2760 VMRegPair *SharedRuntime::find_callee_arguments(Symbol* sig, bool has_receiver, int* arg_size) { |
0 | 2761 // This method is returning a data structure allocating as a |
2762 // ResourceObject, so do not put any ResourceMarks in here. | |
2763 char *s = sig->as_C_string(); | |
2764 int len = (int)strlen(s); | |
2765 *s++; len--; // Skip opening paren | |
2766 char *t = s+len; | |
2767 while( *(--t) != ')' ) ; // Find close paren | |
2768 | |
2769 BasicType *sig_bt = NEW_RESOURCE_ARRAY( BasicType, 256 ); | |
2770 VMRegPair *regs = NEW_RESOURCE_ARRAY( VMRegPair, 256 ); | |
2771 int cnt = 0; | |
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2772 if (has_receiver) { |
0 | 2773 sig_bt[cnt++] = T_OBJECT; // Receiver is argument 0; not in signature |
2774 } | |
2775 | |
2776 while( s < t ) { | |
2777 switch( *s++ ) { // Switch on signature character | |
2778 case 'B': sig_bt[cnt++] = T_BYTE; break; | |
2779 case 'C': sig_bt[cnt++] = T_CHAR; break; | |
2780 case 'D': sig_bt[cnt++] = T_DOUBLE; sig_bt[cnt++] = T_VOID; break; | |
2781 case 'F': sig_bt[cnt++] = T_FLOAT; break; | |
2782 case 'I': sig_bt[cnt++] = T_INT; break; | |
2783 case 'J': sig_bt[cnt++] = T_LONG; sig_bt[cnt++] = T_VOID; break; | |
2784 case 'S': sig_bt[cnt++] = T_SHORT; break; | |
2785 case 'Z': sig_bt[cnt++] = T_BOOLEAN; break; | |
2786 case 'V': sig_bt[cnt++] = T_VOID; break; | |
2787 case 'L': // Oop | |
2788 while( *s++ != ';' ) ; // Skip signature | |
2789 sig_bt[cnt++] = T_OBJECT; | |
2790 break; | |
2791 case '[': { // Array | |
2792 do { // Skip optional size | |
2793 while( *s >= '0' && *s <= '9' ) s++; | |
2794 } while( *s++ == '[' ); // Nested arrays? | |
2795 // Skip element type | |
2796 if( s[-1] == 'L' ) | |
2797 while( *s++ != ';' ) ; // Skip signature | |
2798 sig_bt[cnt++] = T_ARRAY; | |
2799 break; | |
2800 } | |
2801 default : ShouldNotReachHere(); | |
2802 } | |
2803 } | |
2804 assert( cnt < 256, "grow table size" ); | |
2805 | |
2806 int comp_args_on_stack; | |
2807 comp_args_on_stack = java_calling_convention(sig_bt, regs, cnt, true); | |
2808 | |
2809 // the calling convention doesn't count out_preserve_stack_slots so | |
2810 // we must add that in to get "true" stack offsets. | |
2811 | |
2812 if (comp_args_on_stack) { | |
2813 for (int i = 0; i < cnt; i++) { | |
2814 VMReg reg1 = regs[i].first(); | |
2815 if( reg1->is_stack()) { | |
2816 // Yuck | |
2817 reg1 = reg1->bias(out_preserve_stack_slots()); | |
2818 } | |
2819 VMReg reg2 = regs[i].second(); | |
2820 if( reg2->is_stack()) { | |
2821 // Yuck | |
2822 reg2 = reg2->bias(out_preserve_stack_slots()); | |
2823 } | |
2824 regs[i].set_pair(reg2, reg1); | |
2825 } | |
2826 } | |
2827 | |
2828 // results | |
2829 *arg_size = cnt; | |
2830 return regs; | |
2831 } | |
2832 | |
2833 // OSR Migration Code | |
2834 // | |
2835 // This code is used convert interpreter frames into compiled frames. It is | |
2836 // called from very start of a compiled OSR nmethod. A temp array is | |
2837 // allocated to hold the interesting bits of the interpreter frame. All | |
2838 // active locks are inflated to allow them to move. The displaced headers and | |
2839 // active interpeter locals are copied into the temp buffer. Then we return | |
2840 // back to the compiled code. The compiled code then pops the current | |
2841 // interpreter frame off the stack and pushes a new compiled frame. Then it | |
2842 // copies the interpreter locals and displaced headers where it wants. | |
2843 // Finally it calls back to free the temp buffer. | |
2844 // | |
2845 // All of this is done NOT at any Safepoint, nor is any safepoint or GC allowed. | |
2846 | |
2847 JRT_LEAF(intptr_t*, SharedRuntime::OSR_migration_begin( JavaThread *thread) ) | |
2848 | |
2849 #ifdef IA64 | |
2850 ShouldNotReachHere(); // NYI | |
2851 #endif /* IA64 */ | |
2852 | |
2853 // | |
2854 // This code is dependent on the memory layout of the interpreter local | |
2855 // array and the monitors. On all of our platforms the layout is identical | |
2856 // so this code is shared. If some platform lays the their arrays out | |
2857 // differently then this code could move to platform specific code or | |
2858 // the code here could be modified to copy items one at a time using | |
2859 // frame accessor methods and be platform independent. | |
2860 | |
2861 frame fr = thread->last_frame(); | |
2862 assert( fr.is_interpreted_frame(), "" ); | |
2863 assert( fr.interpreter_frame_expression_stack_size()==0, "only handle empty stacks" ); | |
2864 | |
2865 // Figure out how many monitors are active. | |
2866 int active_monitor_count = 0; | |
2867 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); | |
2868 kptr < fr.interpreter_frame_monitor_begin(); | |
2869 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { | |
2870 if( kptr->obj() != NULL ) active_monitor_count++; | |
2871 } | |
2872 | |
2873 // QQQ we could place number of active monitors in the array so that compiled code | |
2874 // could double check it. | |
2875 | |
2876 methodOop moop = fr.interpreter_frame_method(); | |
2877 int max_locals = moop->max_locals(); | |
2878 // Allocate temp buffer, 1 word per local & 2 per active monitor | |
2879 int buf_size_words = max_locals + active_monitor_count*2; | |
2880 intptr_t *buf = NEW_C_HEAP_ARRAY(intptr_t,buf_size_words); | |
2881 | |
2882 // Copy the locals. Order is preserved so that loading of longs works. | |
2883 // Since there's no GC I can copy the oops blindly. | |
2884 assert( sizeof(HeapWord)==sizeof(intptr_t), "fix this code"); | |
1506 | 2885 Copy::disjoint_words((HeapWord*)fr.interpreter_frame_local_at(max_locals-1), |
0 | 2886 (HeapWord*)&buf[0], |
2887 max_locals); | |
2888 | |
2889 // Inflate locks. Copy the displaced headers. Be careful, there can be holes. | |
2890 int i = max_locals; | |
2891 for( BasicObjectLock *kptr2 = fr.interpreter_frame_monitor_end(); | |
2892 kptr2 < fr.interpreter_frame_monitor_begin(); | |
2893 kptr2 = fr.next_monitor_in_interpreter_frame(kptr2) ) { | |
2894 if( kptr2->obj() != NULL) { // Avoid 'holes' in the monitor array | |
2895 BasicLock *lock = kptr2->lock(); | |
2896 // Inflate so the displaced header becomes position-independent | |
2897 if (lock->displaced_header()->is_unlocked()) | |
2898 ObjectSynchronizer::inflate_helper(kptr2->obj()); | |
2899 // Now the displaced header is free to move | |
2900 buf[i++] = (intptr_t)lock->displaced_header(); | |
2901 buf[i++] = (intptr_t)kptr2->obj(); | |
2902 } | |
2903 } | |
2904 assert( i - max_locals == active_monitor_count*2, "found the expected number of monitors" ); | |
2905 | |
2906 return buf; | |
2907 JRT_END | |
2908 | |
2909 JRT_LEAF(void, SharedRuntime::OSR_migration_end( intptr_t* buf) ) | |
2910 FREE_C_HEAP_ARRAY(intptr_t,buf); | |
2911 JRT_END | |
2912 | |
2913 bool AdapterHandlerLibrary::contains(CodeBlob* b) { | |
1187
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2914 AdapterHandlerTableIterator iter(_adapters); |
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2915 while (iter.has_next()) { |
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2916 AdapterHandlerEntry* a = iter.next(); |
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2917 if ( b == CodeCache::find_blob(a->get_i2c_entry()) ) return true; |
0 | 2918 } |
2919 return false; | |
2920 } | |
2921 | |
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2922 void AdapterHandlerLibrary::print_handler_on(outputStream* st, CodeBlob* b) { |
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2923 AdapterHandlerTableIterator iter(_adapters); |
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2924 while (iter.has_next()) { |
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2925 AdapterHandlerEntry* a = iter.next(); |
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2926 if ( b == CodeCache::find_blob(a->get_i2c_entry()) ) { |
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2927 st->print("Adapter for signature: "); |
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2928 st->print_cr("%s i2c: " INTPTR_FORMAT " c2i: " INTPTR_FORMAT " c2iUV: " INTPTR_FORMAT, |
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2929 a->fingerprint()->as_string(), |
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2930 a->get_i2c_entry(), a->get_c2i_entry(), a->get_c2i_unverified_entry()); |
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2931 |
0 | 2932 return; |
2933 } | |
2934 } | |
2935 assert(false, "Should have found handler"); | |
2936 } | |
1187
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2937 |
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2938 #ifndef PRODUCT |
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2939 |
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2940 void AdapterHandlerLibrary::print_statistics() { |
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2941 _adapters->print_statistics(); |
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2942 } |
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2943 |
0 | 2944 #endif /* PRODUCT */ |