Mercurial > hg > truffle
annotate src/share/vm/runtime/sharedRuntime.cpp @ 1832:22e4420d19f7
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author | kvn |
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date | Wed, 06 Oct 2010 14:18:32 -0700 |
parents | d257356e35f0 |
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rev | line source |
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0 | 1 /* |
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2 * Copyright (c) 1997, 2010, 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 | |
25 #include "incls/_precompiled.incl" | |
26 #include "incls/_sharedRuntime.cpp.incl" | |
27 #include <math.h> | |
28 | |
29 HS_DTRACE_PROBE_DECL4(hotspot, object__alloc, Thread*, char*, int, size_t); | |
30 HS_DTRACE_PROBE_DECL7(hotspot, method__entry, int, | |
31 char*, int, char*, int, char*, int); | |
32 HS_DTRACE_PROBE_DECL7(hotspot, method__return, int, | |
33 char*, int, char*, int, char*, int); | |
34 | |
35 // Implementation of SharedRuntime | |
36 | |
37 #ifndef PRODUCT | |
38 // For statistics | |
39 int SharedRuntime::_ic_miss_ctr = 0; | |
40 int SharedRuntime::_wrong_method_ctr = 0; | |
41 int SharedRuntime::_resolve_static_ctr = 0; | |
42 int SharedRuntime::_resolve_virtual_ctr = 0; | |
43 int SharedRuntime::_resolve_opt_virtual_ctr = 0; | |
44 int SharedRuntime::_implicit_null_throws = 0; | |
45 int SharedRuntime::_implicit_div0_throws = 0; | |
46 int SharedRuntime::_throw_null_ctr = 0; | |
47 | |
48 int SharedRuntime::_nof_normal_calls = 0; | |
49 int SharedRuntime::_nof_optimized_calls = 0; | |
50 int SharedRuntime::_nof_inlined_calls = 0; | |
51 int SharedRuntime::_nof_megamorphic_calls = 0; | |
52 int SharedRuntime::_nof_static_calls = 0; | |
53 int SharedRuntime::_nof_inlined_static_calls = 0; | |
54 int SharedRuntime::_nof_interface_calls = 0; | |
55 int SharedRuntime::_nof_optimized_interface_calls = 0; | |
56 int SharedRuntime::_nof_inlined_interface_calls = 0; | |
57 int SharedRuntime::_nof_megamorphic_interface_calls = 0; | |
58 int SharedRuntime::_nof_removable_exceptions = 0; | |
59 | |
60 int SharedRuntime::_new_instance_ctr=0; | |
61 int SharedRuntime::_new_array_ctr=0; | |
62 int SharedRuntime::_multi1_ctr=0; | |
63 int SharedRuntime::_multi2_ctr=0; | |
64 int SharedRuntime::_multi3_ctr=0; | |
65 int SharedRuntime::_multi4_ctr=0; | |
66 int SharedRuntime::_multi5_ctr=0; | |
67 int SharedRuntime::_mon_enter_stub_ctr=0; | |
68 int SharedRuntime::_mon_exit_stub_ctr=0; | |
69 int SharedRuntime::_mon_enter_ctr=0; | |
70 int SharedRuntime::_mon_exit_ctr=0; | |
71 int SharedRuntime::_partial_subtype_ctr=0; | |
72 int SharedRuntime::_jbyte_array_copy_ctr=0; | |
73 int SharedRuntime::_jshort_array_copy_ctr=0; | |
74 int SharedRuntime::_jint_array_copy_ctr=0; | |
75 int SharedRuntime::_jlong_array_copy_ctr=0; | |
76 int SharedRuntime::_oop_array_copy_ctr=0; | |
77 int SharedRuntime::_checkcast_array_copy_ctr=0; | |
78 int SharedRuntime::_unsafe_array_copy_ctr=0; | |
79 int SharedRuntime::_generic_array_copy_ctr=0; | |
80 int SharedRuntime::_slow_array_copy_ctr=0; | |
81 int SharedRuntime::_find_handler_ctr=0; | |
82 int SharedRuntime::_rethrow_ctr=0; | |
83 | |
84 int SharedRuntime::_ICmiss_index = 0; | |
85 int SharedRuntime::_ICmiss_count[SharedRuntime::maxICmiss_count]; | |
86 address SharedRuntime::_ICmiss_at[SharedRuntime::maxICmiss_count]; | |
87 | |
88 void SharedRuntime::trace_ic_miss(address at) { | |
89 for (int i = 0; i < _ICmiss_index; i++) { | |
90 if (_ICmiss_at[i] == at) { | |
91 _ICmiss_count[i]++; | |
92 return; | |
93 } | |
94 } | |
95 int index = _ICmiss_index++; | |
96 if (_ICmiss_index >= maxICmiss_count) _ICmiss_index = maxICmiss_count - 1; | |
97 _ICmiss_at[index] = at; | |
98 _ICmiss_count[index] = 1; | |
99 } | |
100 | |
101 void SharedRuntime::print_ic_miss_histogram() { | |
102 if (ICMissHistogram) { | |
103 tty->print_cr ("IC Miss Histogram:"); | |
104 int tot_misses = 0; | |
105 for (int i = 0; i < _ICmiss_index; i++) { | |
106 tty->print_cr(" at: " INTPTR_FORMAT " nof: %d", _ICmiss_at[i], _ICmiss_count[i]); | |
107 tot_misses += _ICmiss_count[i]; | |
108 } | |
109 tty->print_cr ("Total IC misses: %7d", tot_misses); | |
110 } | |
111 } | |
112 #endif // PRODUCT | |
113 | |
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114 #ifndef SERIALGC |
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115 |
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116 // G1 write-barrier pre: executed before a pointer store. |
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117 JRT_LEAF(void, SharedRuntime::g1_wb_pre(oopDesc* orig, JavaThread *thread)) |
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118 if (orig == NULL) { |
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119 assert(false, "should be optimized out"); |
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120 return; |
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121 } |
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122 assert(orig->is_oop(true /* ignore mark word */), "Error"); |
342
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123 // store the original value that was in the field reference |
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124 thread->satb_mark_queue().enqueue(orig); |
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125 JRT_END |
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126 |
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127 // G1 write-barrier post: executed after a pointer store. |
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128 JRT_LEAF(void, SharedRuntime::g1_wb_post(void* card_addr, JavaThread* thread)) |
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129 thread->dirty_card_queue().enqueue(card_addr); |
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130 JRT_END |
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131 |
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132 #endif // !SERIALGC |
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133 |
0 | 134 |
135 JRT_LEAF(jlong, SharedRuntime::lmul(jlong y, jlong x)) | |
136 return x * y; | |
137 JRT_END | |
138 | |
139 | |
140 JRT_LEAF(jlong, SharedRuntime::ldiv(jlong y, jlong x)) | |
141 if (x == min_jlong && y == CONST64(-1)) { | |
142 return x; | |
143 } else { | |
144 return x / y; | |
145 } | |
146 JRT_END | |
147 | |
148 | |
149 JRT_LEAF(jlong, SharedRuntime::lrem(jlong y, jlong x)) | |
150 if (x == min_jlong && y == CONST64(-1)) { | |
151 return 0; | |
152 } else { | |
153 return x % y; | |
154 } | |
155 JRT_END | |
156 | |
157 | |
158 const juint float_sign_mask = 0x7FFFFFFF; | |
159 const juint float_infinity = 0x7F800000; | |
160 const julong double_sign_mask = CONST64(0x7FFFFFFFFFFFFFFF); | |
161 const julong double_infinity = CONST64(0x7FF0000000000000); | |
162 | |
163 JRT_LEAF(jfloat, SharedRuntime::frem(jfloat x, jfloat y)) | |
164 #ifdef _WIN64 | |
165 // 64-bit Windows on amd64 returns the wrong values for | |
166 // infinity operands. | |
167 union { jfloat f; juint i; } xbits, ybits; | |
168 xbits.f = x; | |
169 ybits.f = y; | |
170 // x Mod Infinity == x unless x is infinity | |
171 if ( ((xbits.i & float_sign_mask) != float_infinity) && | |
172 ((ybits.i & float_sign_mask) == float_infinity) ) { | |
173 return x; | |
174 } | |
175 #endif | |
176 return ((jfloat)fmod((double)x,(double)y)); | |
177 JRT_END | |
178 | |
179 | |
180 JRT_LEAF(jdouble, SharedRuntime::drem(jdouble x, jdouble y)) | |
181 #ifdef _WIN64 | |
182 union { jdouble d; julong l; } xbits, ybits; | |
183 xbits.d = x; | |
184 ybits.d = y; | |
185 // x Mod Infinity == x unless x is infinity | |
186 if ( ((xbits.l & double_sign_mask) != double_infinity) && | |
187 ((ybits.l & double_sign_mask) == double_infinity) ) { | |
188 return x; | |
189 } | |
190 #endif | |
191 return ((jdouble)fmod((double)x,(double)y)); | |
192 JRT_END | |
193 | |
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194 #ifdef __SOFTFP__ |
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195 JRT_LEAF(jfloat, SharedRuntime::fadd(jfloat x, jfloat y)) |
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196 return x + y; |
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197 JRT_END |
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198 |
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199 JRT_LEAF(jfloat, SharedRuntime::fsub(jfloat x, jfloat y)) |
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200 return x - y; |
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201 JRT_END |
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202 |
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203 JRT_LEAF(jfloat, SharedRuntime::fmul(jfloat x, jfloat y)) |
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204 return x * y; |
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205 JRT_END |
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206 |
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207 JRT_LEAF(jfloat, SharedRuntime::fdiv(jfloat x, jfloat y)) |
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208 return x / y; |
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209 JRT_END |
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210 |
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211 JRT_LEAF(jdouble, SharedRuntime::dadd(jdouble x, jdouble y)) |
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212 return x + y; |
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213 JRT_END |
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214 |
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215 JRT_LEAF(jdouble, SharedRuntime::dsub(jdouble x, jdouble y)) |
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216 return x - y; |
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217 JRT_END |
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218 |
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219 JRT_LEAF(jdouble, SharedRuntime::dmul(jdouble x, jdouble y)) |
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220 return x * y; |
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221 JRT_END |
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222 |
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223 JRT_LEAF(jdouble, SharedRuntime::ddiv(jdouble x, jdouble y)) |
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224 return x / y; |
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225 JRT_END |
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226 |
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227 JRT_LEAF(jfloat, SharedRuntime::i2f(jint x)) |
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228 return (jfloat)x; |
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229 JRT_END |
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230 |
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231 JRT_LEAF(jdouble, SharedRuntime::i2d(jint x)) |
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232 return (jdouble)x; |
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233 JRT_END |
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234 |
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235 JRT_LEAF(jdouble, SharedRuntime::f2d(jfloat x)) |
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236 return (jdouble)x; |
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237 JRT_END |
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238 |
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239 JRT_LEAF(int, SharedRuntime::fcmpl(float x, float y)) |
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240 return x>y ? 1 : (x==y ? 0 : -1); /* x<y or is_nan*/ |
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241 JRT_END |
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242 |
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243 JRT_LEAF(int, SharedRuntime::fcmpg(float x, float y)) |
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244 return x<y ? -1 : (x==y ? 0 : 1); /* x>y or is_nan */ |
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245 JRT_END |
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246 |
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247 JRT_LEAF(int, SharedRuntime::dcmpl(double x, double y)) |
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248 return x>y ? 1 : (x==y ? 0 : -1); /* x<y or is_nan */ |
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249 JRT_END |
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250 |
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251 JRT_LEAF(int, SharedRuntime::dcmpg(double x, double y)) |
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252 return x<y ? -1 : (x==y ? 0 : 1); /* x>y or is_nan */ |
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253 JRT_END |
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254 |
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255 // Functions to return the opposite of the aeabi functions for nan. |
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256 JRT_LEAF(int, SharedRuntime::unordered_fcmplt(float x, float y)) |
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257 return (x < y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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258 JRT_END |
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259 |
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260 JRT_LEAF(int, SharedRuntime::unordered_dcmplt(double x, double y)) |
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261 return (x < y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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262 JRT_END |
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263 |
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264 JRT_LEAF(int, SharedRuntime::unordered_fcmple(float x, float y)) |
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265 return (x <= y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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266 JRT_END |
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267 |
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268 JRT_LEAF(int, SharedRuntime::unordered_dcmple(double x, double y)) |
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269 return (x <= y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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270 JRT_END |
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271 |
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272 JRT_LEAF(int, SharedRuntime::unordered_fcmpge(float x, float y)) |
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273 return (x >= y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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274 JRT_END |
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275 |
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276 JRT_LEAF(int, SharedRuntime::unordered_dcmpge(double x, double y)) |
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277 return (x >= y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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278 JRT_END |
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279 |
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280 JRT_LEAF(int, SharedRuntime::unordered_fcmpgt(float x, float y)) |
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281 return (x > y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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282 JRT_END |
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283 |
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284 JRT_LEAF(int, SharedRuntime::unordered_dcmpgt(double x, double y)) |
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285 return (x > y) ? 1 : ((g_isnan(x) || g_isnan(y)) ? 1 : 0); |
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286 JRT_END |
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287 |
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288 // Intrinsics make gcc generate code for these. |
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289 float SharedRuntime::fneg(float f) { |
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290 return -f; |
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291 } |
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292 |
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293 double SharedRuntime::dneg(double f) { |
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294 return -f; |
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295 } |
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296 |
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297 #endif // __SOFTFP__ |
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298 |
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299 #if defined(__SOFTFP__) || defined(E500V2) |
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300 // Intrinsics make gcc generate code for these. |
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301 double SharedRuntime::dabs(double f) { |
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302 return (f <= (double)0.0) ? (double)0.0 - f : f; |
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303 } |
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304 |
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305 double SharedRuntime::dsqrt(double f) { |
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306 return sqrt(f); |
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307 } |
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308 #endif |
0 | 309 |
310 JRT_LEAF(jint, SharedRuntime::f2i(jfloat x)) | |
508
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311 if (g_isnan(x)) |
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312 return 0; |
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313 if (x >= (jfloat) max_jint) |
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314 return max_jint; |
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315 if (x <= (jfloat) min_jint) |
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316 return min_jint; |
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317 return (jint) x; |
0 | 318 JRT_END |
319 | |
320 | |
321 JRT_LEAF(jlong, SharedRuntime::f2l(jfloat x)) | |
508
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322 if (g_isnan(x)) |
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323 return 0; |
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324 if (x >= (jfloat) max_jlong) |
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325 return max_jlong; |
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326 if (x <= (jfloat) min_jlong) |
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327 return min_jlong; |
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328 return (jlong) x; |
0 | 329 JRT_END |
330 | |
331 | |
332 JRT_LEAF(jint, SharedRuntime::d2i(jdouble x)) | |
508
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333 if (g_isnan(x)) |
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334 return 0; |
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335 if (x >= (jdouble) max_jint) |
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336 return max_jint; |
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337 if (x <= (jdouble) min_jint) |
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338 return min_jint; |
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339 return (jint) x; |
0 | 340 JRT_END |
341 | |
342 | |
343 JRT_LEAF(jlong, SharedRuntime::d2l(jdouble x)) | |
508
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344 if (g_isnan(x)) |
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345 return 0; |
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346 if (x >= (jdouble) max_jlong) |
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347 return max_jlong; |
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348 if (x <= (jdouble) min_jlong) |
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349 return min_jlong; |
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350 return (jlong) x; |
0 | 351 JRT_END |
352 | |
353 | |
354 JRT_LEAF(jfloat, SharedRuntime::d2f(jdouble x)) | |
355 return (jfloat)x; | |
356 JRT_END | |
357 | |
358 | |
359 JRT_LEAF(jfloat, SharedRuntime::l2f(jlong x)) | |
360 return (jfloat)x; | |
361 JRT_END | |
362 | |
363 | |
364 JRT_LEAF(jdouble, SharedRuntime::l2d(jlong x)) | |
365 return (jdouble)x; | |
366 JRT_END | |
367 | |
368 // Exception handling accross interpreter/compiler boundaries | |
369 // | |
370 // exception_handler_for_return_address(...) returns the continuation address. | |
371 // The continuation address is the entry point of the exception handler of the | |
372 // previous frame depending on the return address. | |
373 | |
1295 | 374 address SharedRuntime::raw_exception_handler_for_return_address(JavaThread* thread, address return_address) { |
0 | 375 assert(frame::verify_return_pc(return_address), "must be a return pc"); |
376 | |
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377 // Reset MethodHandle flag. |
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378 thread->set_is_method_handle_return(false); |
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379 |
0 | 380 // the fastest case first |
381 CodeBlob* blob = CodeCache::find_blob(return_address); | |
382 if (blob != NULL && blob->is_nmethod()) { | |
383 nmethod* code = (nmethod*)blob; | |
384 assert(code != NULL, "nmethod must be present"); | |
1295 | 385 // Check if the return address is a MethodHandle call site. |
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386 thread->set_is_method_handle_return(code->is_method_handle_return(return_address)); |
0 | 387 // native nmethods don't have exception handlers |
388 assert(!code->is_native_method(), "no exception handler"); | |
389 assert(code->header_begin() != code->exception_begin(), "no exception handler"); | |
390 if (code->is_deopt_pc(return_address)) { | |
391 return SharedRuntime::deopt_blob()->unpack_with_exception(); | |
392 } else { | |
393 return code->exception_begin(); | |
394 } | |
395 } | |
396 | |
397 // Entry code | |
398 if (StubRoutines::returns_to_call_stub(return_address)) { | |
399 return StubRoutines::catch_exception_entry(); | |
400 } | |
401 // Interpreted code | |
402 if (Interpreter::contains(return_address)) { | |
403 return Interpreter::rethrow_exception_entry(); | |
404 } | |
405 | |
406 // Compiled code | |
407 if (CodeCache::contains(return_address)) { | |
408 CodeBlob* blob = CodeCache::find_blob(return_address); | |
409 if (blob->is_nmethod()) { | |
410 nmethod* code = (nmethod*)blob; | |
411 assert(code != NULL, "nmethod must be present"); | |
1295 | 412 // Check if the return address is a MethodHandle call site. |
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413 thread->set_is_method_handle_return(code->is_method_handle_return(return_address)); |
0 | 414 assert(code->header_begin() != code->exception_begin(), "no exception handler"); |
415 return code->exception_begin(); | |
416 } | |
417 if (blob->is_runtime_stub()) { | |
418 ShouldNotReachHere(); // callers are responsible for skipping runtime stub frames | |
419 } | |
420 } | |
421 guarantee(!VtableStubs::contains(return_address), "NULL exceptions in vtables should have been handled already!"); | |
422 #ifndef PRODUCT | |
423 { ResourceMark rm; | |
424 tty->print_cr("No exception handler found for exception at " INTPTR_FORMAT " - potential problems:", return_address); | |
425 tty->print_cr("a) exception happened in (new?) code stubs/buffers that is not handled here"); | |
426 tty->print_cr("b) other problem"); | |
427 } | |
428 #endif // PRODUCT | |
429 ShouldNotReachHere(); | |
430 return NULL; | |
431 } | |
432 | |
433 | |
1295 | 434 JRT_LEAF(address, SharedRuntime::exception_handler_for_return_address(JavaThread* thread, address return_address)) |
435 return raw_exception_handler_for_return_address(thread, return_address); | |
0 | 436 JRT_END |
437 | |
1295 | 438 |
0 | 439 address SharedRuntime::get_poll_stub(address pc) { |
440 address stub; | |
441 // Look up the code blob | |
442 CodeBlob *cb = CodeCache::find_blob(pc); | |
443 | |
444 // Should be an nmethod | |
445 assert( cb && cb->is_nmethod(), "safepoint polling: pc must refer to an nmethod" ); | |
446 | |
447 // Look up the relocation information | |
448 assert( ((nmethod*)cb)->is_at_poll_or_poll_return(pc), | |
449 "safepoint polling: type must be poll" ); | |
450 | |
451 assert( ((NativeInstruction*)pc)->is_safepoint_poll(), | |
452 "Only polling locations are used for safepoint"); | |
453 | |
454 bool at_poll_return = ((nmethod*)cb)->is_at_poll_return(pc); | |
455 if (at_poll_return) { | |
456 assert(SharedRuntime::polling_page_return_handler_blob() != NULL, | |
457 "polling page return stub not created yet"); | |
1748 | 458 stub = SharedRuntime::polling_page_return_handler_blob()->entry_point(); |
0 | 459 } else { |
460 assert(SharedRuntime::polling_page_safepoint_handler_blob() != NULL, | |
461 "polling page safepoint stub not created yet"); | |
1748 | 462 stub = SharedRuntime::polling_page_safepoint_handler_blob()->entry_point(); |
0 | 463 } |
464 #ifndef PRODUCT | |
465 if( TraceSafepoint ) { | |
466 char buf[256]; | |
467 jio_snprintf(buf, sizeof(buf), | |
468 "... found polling page %s exception at pc = " | |
469 INTPTR_FORMAT ", stub =" INTPTR_FORMAT, | |
470 at_poll_return ? "return" : "loop", | |
471 (intptr_t)pc, (intptr_t)stub); | |
472 tty->print_raw_cr(buf); | |
473 } | |
474 #endif // PRODUCT | |
475 return stub; | |
476 } | |
477 | |
478 | |
479 oop SharedRuntime::retrieve_receiver( symbolHandle sig, frame caller ) { | |
480 assert(caller.is_interpreted_frame(), ""); | |
481 int args_size = ArgumentSizeComputer(sig).size() + 1; | |
482 assert(args_size <= caller.interpreter_frame_expression_stack_size(), "receiver must be on interpreter stack"); | |
483 oop result = (oop) *caller.interpreter_frame_tos_at(args_size - 1); | |
484 assert(Universe::heap()->is_in(result) && result->is_oop(), "receiver must be an oop"); | |
485 return result; | |
486 } | |
487 | |
488 | |
489 void SharedRuntime::throw_and_post_jvmti_exception(JavaThread *thread, Handle h_exception) { | |
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490 if (JvmtiExport::can_post_on_exceptions()) { |
0 | 491 vframeStream vfst(thread, true); |
492 methodHandle method = methodHandle(thread, vfst.method()); | |
493 address bcp = method()->bcp_from(vfst.bci()); | |
494 JvmtiExport::post_exception_throw(thread, method(), bcp, h_exception()); | |
495 } | |
496 Exceptions::_throw(thread, __FILE__, __LINE__, h_exception); | |
497 } | |
498 | |
499 void SharedRuntime::throw_and_post_jvmti_exception(JavaThread *thread, symbolOop name, const char *message) { | |
500 Handle h_exception = Exceptions::new_exception(thread, name, message); | |
501 throw_and_post_jvmti_exception(thread, h_exception); | |
502 } | |
503 | |
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504 // The interpreter code to call this tracing function is only |
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505 // called/generated when TraceRedefineClasses has the right bits |
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506 // set. Since obsolete methods are never compiled, we don't have |
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507 // to modify the compilers to generate calls to this function. |
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508 // |
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509 JRT_LEAF(int, SharedRuntime::rc_trace_method_entry( |
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510 JavaThread* thread, methodOopDesc* method)) |
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511 assert(RC_TRACE_IN_RANGE(0x00001000, 0x00002000), "wrong call"); |
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512 |
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513 if (method->is_obsolete()) { |
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514 // We are calling an obsolete method, but this is not necessarily |
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515 // an error. Our method could have been redefined just after we |
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516 // fetched the methodOop from the constant pool. |
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517 |
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518 // RC_TRACE macro has an embedded ResourceMark |
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519 RC_TRACE_WITH_THREAD(0x00001000, thread, |
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520 ("calling obsolete method '%s'", |
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521 method->name_and_sig_as_C_string())); |
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522 if (RC_TRACE_ENABLED(0x00002000)) { |
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523 // this option is provided to debug calls to obsolete methods |
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524 guarantee(false, "faulting at call to an obsolete method."); |
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525 } |
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526 } |
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527 return 0; |
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528 JRT_END |
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529 |
0 | 530 // ret_pc points into caller; we are returning caller's exception handler |
531 // for given exception | |
532 address SharedRuntime::compute_compiled_exc_handler(nmethod* nm, address ret_pc, Handle& exception, | |
533 bool force_unwind, bool top_frame_only) { | |
534 assert(nm != NULL, "must exist"); | |
535 ResourceMark rm; | |
536 | |
537 ScopeDesc* sd = nm->scope_desc_at(ret_pc); | |
538 // determine handler bci, if any | |
539 EXCEPTION_MARK; | |
540 | |
541 int handler_bci = -1; | |
542 int scope_depth = 0; | |
543 if (!force_unwind) { | |
544 int bci = sd->bci(); | |
545 do { | |
546 bool skip_scope_increment = false; | |
547 // exception handler lookup | |
548 KlassHandle ek (THREAD, exception->klass()); | |
549 handler_bci = sd->method()->fast_exception_handler_bci_for(ek, bci, THREAD); | |
550 if (HAS_PENDING_EXCEPTION) { | |
551 // We threw an exception while trying to find the exception handler. | |
552 // Transfer the new exception to the exception handle which will | |
553 // be set into thread local storage, and do another lookup for an | |
554 // exception handler for this exception, this time starting at the | |
555 // BCI of the exception handler which caused the exception to be | |
556 // thrown (bugs 4307310 and 4546590). Set "exception" reference | |
557 // argument to ensure that the correct exception is thrown (4870175). | |
558 exception = Handle(THREAD, PENDING_EXCEPTION); | |
559 CLEAR_PENDING_EXCEPTION; | |
560 if (handler_bci >= 0) { | |
561 bci = handler_bci; | |
562 handler_bci = -1; | |
563 skip_scope_increment = true; | |
564 } | |
565 } | |
566 if (!top_frame_only && handler_bci < 0 && !skip_scope_increment) { | |
567 sd = sd->sender(); | |
568 if (sd != NULL) { | |
569 bci = sd->bci(); | |
570 } | |
571 ++scope_depth; | |
572 } | |
573 } while (!top_frame_only && handler_bci < 0 && sd != NULL); | |
574 } | |
575 | |
576 // found handling method => lookup exception handler | |
1748 | 577 int catch_pco = ret_pc - nm->code_begin(); |
0 | 578 |
579 ExceptionHandlerTable table(nm); | |
580 HandlerTableEntry *t = table.entry_for(catch_pco, handler_bci, scope_depth); | |
581 if (t == NULL && (nm->is_compiled_by_c1() || handler_bci != -1)) { | |
582 // Allow abbreviated catch tables. The idea is to allow a method | |
583 // to materialize its exceptions without committing to the exact | |
584 // routing of exceptions. In particular this is needed for adding | |
585 // a synthethic handler to unlock monitors when inlining | |
586 // synchonized methods since the unlock path isn't represented in | |
587 // the bytecodes. | |
588 t = table.entry_for(catch_pco, -1, 0); | |
589 } | |
590 | |
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591 #ifdef COMPILER1 |
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592 if (t == NULL && nm->is_compiled_by_c1()) { |
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593 assert(nm->unwind_handler_begin() != NULL, ""); |
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594 return nm->unwind_handler_begin(); |
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595 } |
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596 #endif |
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597 |
0 | 598 if (t == NULL) { |
599 tty->print_cr("MISSING EXCEPTION HANDLER for pc " INTPTR_FORMAT " and handler bci %d", ret_pc, handler_bci); | |
600 tty->print_cr(" Exception:"); | |
601 exception->print(); | |
602 tty->cr(); | |
603 tty->print_cr(" Compiled exception table :"); | |
604 table.print(); | |
605 nm->print_code(); | |
606 guarantee(false, "missing exception handler"); | |
607 return NULL; | |
608 } | |
609 | |
1748 | 610 return nm->code_begin() + t->pco(); |
0 | 611 } |
612 | |
613 JRT_ENTRY(void, SharedRuntime::throw_AbstractMethodError(JavaThread* thread)) | |
614 // These errors occur only at call sites | |
615 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_AbstractMethodError()); | |
616 JRT_END | |
617 | |
16
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618 JRT_ENTRY(void, SharedRuntime::throw_IncompatibleClassChangeError(JavaThread* thread)) |
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619 // These errors occur only at call sites |
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620 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_IncompatibleClassChangeError(), "vtable stub"); |
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621 JRT_END |
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622 |
0 | 623 JRT_ENTRY(void, SharedRuntime::throw_ArithmeticException(JavaThread* thread)) |
624 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_ArithmeticException(), "/ by zero"); | |
625 JRT_END | |
626 | |
627 JRT_ENTRY(void, SharedRuntime::throw_NullPointerException(JavaThread* thread)) | |
628 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_NullPointerException()); | |
629 JRT_END | |
630 | |
631 JRT_ENTRY(void, SharedRuntime::throw_NullPointerException_at_call(JavaThread* thread)) | |
632 // This entry point is effectively only used for NullPointerExceptions which occur at inline | |
633 // cache sites (when the callee activation is not yet set up) so we are at a call site | |
634 throw_and_post_jvmti_exception(thread, vmSymbols::java_lang_NullPointerException()); | |
635 JRT_END | |
636 | |
637 JRT_ENTRY(void, SharedRuntime::throw_StackOverflowError(JavaThread* thread)) | |
638 // We avoid using the normal exception construction in this case because | |
639 // it performs an upcall to Java, and we're already out of stack space. | |
640 klassOop k = SystemDictionary::StackOverflowError_klass(); | |
641 oop exception_oop = instanceKlass::cast(k)->allocate_instance(CHECK); | |
642 Handle exception (thread, exception_oop); | |
643 if (StackTraceInThrowable) { | |
644 java_lang_Throwable::fill_in_stack_trace(exception); | |
645 } | |
646 throw_and_post_jvmti_exception(thread, exception); | |
647 JRT_END | |
648 | |
649 address SharedRuntime::continuation_for_implicit_exception(JavaThread* thread, | |
650 address pc, | |
651 SharedRuntime::ImplicitExceptionKind exception_kind) | |
652 { | |
653 address target_pc = NULL; | |
654 | |
655 if (Interpreter::contains(pc)) { | |
656 #ifdef CC_INTERP | |
657 // C++ interpreter doesn't throw implicit exceptions | |
658 ShouldNotReachHere(); | |
659 #else | |
660 switch (exception_kind) { | |
661 case IMPLICIT_NULL: return Interpreter::throw_NullPointerException_entry(); | |
662 case IMPLICIT_DIVIDE_BY_ZERO: return Interpreter::throw_ArithmeticException_entry(); | |
663 case STACK_OVERFLOW: return Interpreter::throw_StackOverflowError_entry(); | |
664 default: ShouldNotReachHere(); | |
665 } | |
666 #endif // !CC_INTERP | |
667 } else { | |
668 switch (exception_kind) { | |
669 case STACK_OVERFLOW: { | |
670 // Stack overflow only occurs upon frame setup; the callee is | |
671 // going to be unwound. Dispatch to a shared runtime stub | |
672 // which will cause the StackOverflowError to be fabricated | |
673 // and processed. | |
674 // For stack overflow in deoptimization blob, cleanup thread. | |
675 if (thread->deopt_mark() != NULL) { | |
676 Deoptimization::cleanup_deopt_info(thread, NULL); | |
677 } | |
678 return StubRoutines::throw_StackOverflowError_entry(); | |
679 } | |
680 | |
681 case IMPLICIT_NULL: { | |
682 if (VtableStubs::contains(pc)) { | |
683 // We haven't yet entered the callee frame. Fabricate an | |
684 // exception and begin dispatching it in the caller. Since | |
685 // the caller was at a call site, it's safe to destroy all | |
686 // caller-saved registers, as these entry points do. | |
687 VtableStub* vt_stub = VtableStubs::stub_containing(pc); | |
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688 |
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689 // If vt_stub is NULL, then return NULL to signal handler to report the SEGV error. |
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690 if (vt_stub == NULL) return NULL; |
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691 |
0 | 692 if (vt_stub->is_abstract_method_error(pc)) { |
693 assert(!vt_stub->is_vtable_stub(), "should never see AbstractMethodErrors from vtable-type VtableStubs"); | |
694 return StubRoutines::throw_AbstractMethodError_entry(); | |
695 } else { | |
696 return StubRoutines::throw_NullPointerException_at_call_entry(); | |
697 } | |
698 } else { | |
699 CodeBlob* cb = CodeCache::find_blob(pc); | |
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700 |
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701 // If code blob is NULL, then return NULL to signal handler to report the SEGV error. |
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702 if (cb == NULL) return NULL; |
0 | 703 |
704 // Exception happened in CodeCache. Must be either: | |
705 // 1. Inline-cache check in C2I handler blob, | |
706 // 2. Inline-cache check in nmethod, or | |
707 // 3. Implict null exception in nmethod | |
708 | |
709 if (!cb->is_nmethod()) { | |
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710 guarantee(cb->is_adapter_blob() || cb->is_method_handles_adapter_blob(), |
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711 "exception happened outside interpreter, nmethods and vtable stubs (1)"); |
0 | 712 // There is no handler here, so we will simply unwind. |
713 return StubRoutines::throw_NullPointerException_at_call_entry(); | |
714 } | |
715 | |
716 // Otherwise, it's an nmethod. Consult its exception handlers. | |
717 nmethod* nm = (nmethod*)cb; | |
718 if (nm->inlinecache_check_contains(pc)) { | |
719 // exception happened inside inline-cache check code | |
720 // => the nmethod is not yet active (i.e., the frame | |
721 // is not set up yet) => use return address pushed by | |
722 // caller => don't push another return address | |
723 return StubRoutines::throw_NullPointerException_at_call_entry(); | |
724 } | |
725 | |
726 #ifndef PRODUCT | |
727 _implicit_null_throws++; | |
728 #endif | |
729 target_pc = nm->continuation_for_implicit_exception(pc); | |
1250 | 730 // If there's an unexpected fault, target_pc might be NULL, |
731 // in which case we want to fall through into the normal | |
732 // error handling code. | |
0 | 733 } |
734 | |
735 break; // fall through | |
736 } | |
737 | |
738 | |
739 case IMPLICIT_DIVIDE_BY_ZERO: { | |
740 nmethod* nm = CodeCache::find_nmethod(pc); | |
741 guarantee(nm != NULL, "must have containing nmethod for implicit division-by-zero exceptions"); | |
742 #ifndef PRODUCT | |
743 _implicit_div0_throws++; | |
744 #endif | |
745 target_pc = nm->continuation_for_implicit_exception(pc); | |
1250 | 746 // If there's an unexpected fault, target_pc might be NULL, |
747 // in which case we want to fall through into the normal | |
748 // error handling code. | |
0 | 749 break; // fall through |
750 } | |
751 | |
752 default: ShouldNotReachHere(); | |
753 } | |
754 | |
755 assert(exception_kind == IMPLICIT_NULL || exception_kind == IMPLICIT_DIVIDE_BY_ZERO, "wrong implicit exception kind"); | |
756 | |
757 // for AbortVMOnException flag | |
758 NOT_PRODUCT(Exceptions::debug_check_abort("java.lang.NullPointerException")); | |
759 if (exception_kind == IMPLICIT_NULL) { | |
760 Events::log("Implicit null exception at " INTPTR_FORMAT " to " INTPTR_FORMAT, pc, target_pc); | |
761 } else { | |
762 Events::log("Implicit division by zero exception at " INTPTR_FORMAT " to " INTPTR_FORMAT, pc, target_pc); | |
763 } | |
764 return target_pc; | |
765 } | |
766 | |
767 ShouldNotReachHere(); | |
768 return NULL; | |
769 } | |
770 | |
771 | |
772 JNI_ENTRY(void, throw_unsatisfied_link_error(JNIEnv* env, ...)) | |
773 { | |
774 THROW(vmSymbols::java_lang_UnsatisfiedLinkError()); | |
775 } | |
776 JNI_END | |
777 | |
778 | |
779 address SharedRuntime::native_method_throw_unsatisfied_link_error_entry() { | |
780 return CAST_FROM_FN_PTR(address, &throw_unsatisfied_link_error); | |
781 } | |
782 | |
783 | |
784 #ifndef PRODUCT | |
785 JRT_ENTRY(intptr_t, SharedRuntime::trace_bytecode(JavaThread* thread, intptr_t preserve_this_value, intptr_t tos, intptr_t tos2)) | |
786 const frame f = thread->last_frame(); | |
787 assert(f.is_interpreted_frame(), "must be an interpreted frame"); | |
788 #ifndef PRODUCT | |
789 methodHandle mh(THREAD, f.interpreter_frame_method()); | |
790 BytecodeTracer::trace(mh, f.interpreter_frame_bcp(), tos, tos2); | |
791 #endif // !PRODUCT | |
792 return preserve_this_value; | |
793 JRT_END | |
794 #endif // !PRODUCT | |
795 | |
796 | |
797 JRT_ENTRY(void, SharedRuntime::yield_all(JavaThread* thread, int attempts)) | |
798 os::yield_all(attempts); | |
799 JRT_END | |
800 | |
801 | |
802 JRT_ENTRY_NO_ASYNC(void, SharedRuntime::register_finalizer(JavaThread* thread, oopDesc* obj)) | |
803 assert(obj->is_oop(), "must be a valid oop"); | |
804 assert(obj->klass()->klass_part()->has_finalizer(), "shouldn't be here otherwise"); | |
805 instanceKlass::register_finalizer(instanceOop(obj), CHECK); | |
806 JRT_END | |
807 | |
808 | |
809 jlong SharedRuntime::get_java_tid(Thread* thread) { | |
810 if (thread != NULL) { | |
811 if (thread->is_Java_thread()) { | |
812 oop obj = ((JavaThread*)thread)->threadObj(); | |
813 return (obj == NULL) ? 0 : java_lang_Thread::thread_id(obj); | |
814 } | |
815 } | |
816 return 0; | |
817 } | |
818 | |
819 /** | |
820 * This function ought to be a void function, but cannot be because | |
821 * it gets turned into a tail-call on sparc, which runs into dtrace bug | |
822 * 6254741. Once that is fixed we can remove the dummy return value. | |
823 */ | |
824 int SharedRuntime::dtrace_object_alloc(oopDesc* o) { | |
825 return dtrace_object_alloc_base(Thread::current(), o); | |
826 } | |
827 | |
828 int SharedRuntime::dtrace_object_alloc_base(Thread* thread, oopDesc* o) { | |
829 assert(DTraceAllocProbes, "wrong call"); | |
830 Klass* klass = o->blueprint(); | |
831 int size = o->size(); | |
832 symbolOop name = klass->name(); | |
833 HS_DTRACE_PROBE4(hotspot, object__alloc, get_java_tid(thread), | |
834 name->bytes(), name->utf8_length(), size * HeapWordSize); | |
835 return 0; | |
836 } | |
837 | |
838 JRT_LEAF(int, SharedRuntime::dtrace_method_entry( | |
839 JavaThread* thread, methodOopDesc* method)) | |
840 assert(DTraceMethodProbes, "wrong call"); | |
841 symbolOop kname = method->klass_name(); | |
842 symbolOop name = method->name(); | |
843 symbolOop sig = method->signature(); | |
844 HS_DTRACE_PROBE7(hotspot, method__entry, get_java_tid(thread), | |
845 kname->bytes(), kname->utf8_length(), | |
846 name->bytes(), name->utf8_length(), | |
847 sig->bytes(), sig->utf8_length()); | |
848 return 0; | |
849 JRT_END | |
850 | |
851 JRT_LEAF(int, SharedRuntime::dtrace_method_exit( | |
852 JavaThread* thread, methodOopDesc* method)) | |
853 assert(DTraceMethodProbes, "wrong call"); | |
854 symbolOop kname = method->klass_name(); | |
855 symbolOop name = method->name(); | |
856 symbolOop sig = method->signature(); | |
857 HS_DTRACE_PROBE7(hotspot, method__return, get_java_tid(thread), | |
858 kname->bytes(), kname->utf8_length(), | |
859 name->bytes(), name->utf8_length(), | |
860 sig->bytes(), sig->utf8_length()); | |
861 return 0; | |
862 JRT_END | |
863 | |
864 | |
865 // Finds receiver, CallInfo (i.e. receiver method), and calling bytecode) | |
866 // for a call current in progress, i.e., arguments has been pushed on stack | |
867 // put callee has not been invoked yet. Used by: resolve virtual/static, | |
868 // vtable updates, etc. Caller frame must be compiled. | |
869 Handle SharedRuntime::find_callee_info(JavaThread* thread, Bytecodes::Code& bc, CallInfo& callinfo, TRAPS) { | |
870 ResourceMark rm(THREAD); | |
871 | |
872 // last java frame on stack (which includes native call frames) | |
873 vframeStream vfst(thread, true); // Do not skip and javaCalls | |
874 | |
875 return find_callee_info_helper(thread, vfst, bc, callinfo, CHECK_(Handle())); | |
876 } | |
877 | |
878 | |
879 // Finds receiver, CallInfo (i.e. receiver method), and calling bytecode | |
880 // for a call current in progress, i.e., arguments has been pushed on stack | |
881 // but callee has not been invoked yet. Caller frame must be compiled. | |
882 Handle SharedRuntime::find_callee_info_helper(JavaThread* thread, | |
883 vframeStream& vfst, | |
884 Bytecodes::Code& bc, | |
885 CallInfo& callinfo, TRAPS) { | |
886 Handle receiver; | |
887 Handle nullHandle; //create a handy null handle for exception returns | |
888 | |
889 assert(!vfst.at_end(), "Java frame must exist"); | |
890 | |
891 // Find caller and bci from vframe | |
892 methodHandle caller (THREAD, vfst.method()); | |
893 int bci = vfst.bci(); | |
894 | |
895 // Find bytecode | |
896 Bytecode_invoke* bytecode = Bytecode_invoke_at(caller, bci); | |
1602 | 897 bc = bytecode->java_code(); |
0 | 898 int bytecode_index = bytecode->index(); |
899 | |
900 // Find receiver for non-static call | |
901 if (bc != Bytecodes::_invokestatic) { | |
902 // This register map must be update since we need to find the receiver for | |
903 // compiled frames. The receiver might be in a register. | |
904 RegisterMap reg_map2(thread); | |
905 frame stubFrame = thread->last_frame(); | |
906 // Caller-frame is a compiled frame | |
907 frame callerFrame = stubFrame.sender(®_map2); | |
908 | |
909 methodHandle callee = bytecode->static_target(CHECK_(nullHandle)); | |
910 if (callee.is_null()) { | |
911 THROW_(vmSymbols::java_lang_NoSuchMethodException(), nullHandle); | |
912 } | |
913 // Retrieve from a compiled argument list | |
914 receiver = Handle(THREAD, callerFrame.retrieve_receiver(®_map2)); | |
915 | |
916 if (receiver.is_null()) { | |
917 THROW_(vmSymbols::java_lang_NullPointerException(), nullHandle); | |
918 } | |
919 } | |
920 | |
921 // Resolve method. This is parameterized by bytecode. | |
922 constantPoolHandle constants (THREAD, caller->constants()); | |
923 assert (receiver.is_null() || receiver->is_oop(), "wrong receiver"); | |
924 LinkResolver::resolve_invoke(callinfo, receiver, constants, bytecode_index, bc, CHECK_(nullHandle)); | |
925 | |
926 #ifdef ASSERT | |
927 // Check that the receiver klass is of the right subtype and that it is initialized for virtual calls | |
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928 if (bc != Bytecodes::_invokestatic && bc != Bytecodes::_invokedynamic) { |
0 | 929 assert(receiver.not_null(), "should have thrown exception"); |
930 KlassHandle receiver_klass (THREAD, receiver->klass()); | |
931 klassOop rk = constants->klass_ref_at(bytecode_index, CHECK_(nullHandle)); | |
932 // klass is already loaded | |
933 KlassHandle static_receiver_klass (THREAD, rk); | |
934 assert(receiver_klass->is_subtype_of(static_receiver_klass()), "actual receiver must be subclass of static receiver klass"); | |
935 if (receiver_klass->oop_is_instance()) { | |
936 if (instanceKlass::cast(receiver_klass())->is_not_initialized()) { | |
937 tty->print_cr("ERROR: Klass not yet initialized!!"); | |
938 receiver_klass.print(); | |
939 } | |
940 assert (!instanceKlass::cast(receiver_klass())->is_not_initialized(), "receiver_klass must be initialized"); | |
941 } | |
942 } | |
943 #endif | |
944 | |
945 return receiver; | |
946 } | |
947 | |
948 methodHandle SharedRuntime::find_callee_method(JavaThread* thread, TRAPS) { | |
949 ResourceMark rm(THREAD); | |
950 // We need first to check if any Java activations (compiled, interpreted) | |
951 // exist on the stack since last JavaCall. If not, we need | |
952 // to get the target method from the JavaCall wrapper. | |
953 vframeStream vfst(thread, true); // Do not skip any javaCalls | |
954 methodHandle callee_method; | |
955 if (vfst.at_end()) { | |
956 // No Java frames were found on stack since we did the JavaCall. | |
957 // Hence the stack can only contain an entry_frame. We need to | |
958 // find the target method from the stub frame. | |
959 RegisterMap reg_map(thread, false); | |
960 frame fr = thread->last_frame(); | |
961 assert(fr.is_runtime_frame(), "must be a runtimeStub"); | |
962 fr = fr.sender(®_map); | |
963 assert(fr.is_entry_frame(), "must be"); | |
964 // fr is now pointing to the entry frame. | |
965 callee_method = methodHandle(THREAD, fr.entry_frame_call_wrapper()->callee_method()); | |
966 assert(fr.entry_frame_call_wrapper()->receiver() == NULL || !callee_method->is_static(), "non-null receiver for static call??"); | |
967 } else { | |
968 Bytecodes::Code bc; | |
969 CallInfo callinfo; | |
970 find_callee_info_helper(thread, vfst, bc, callinfo, CHECK_(methodHandle())); | |
971 callee_method = callinfo.selected_method(); | |
972 } | |
973 assert(callee_method()->is_method(), "must be"); | |
974 return callee_method; | |
975 } | |
976 | |
977 // Resolves a call. | |
978 methodHandle SharedRuntime::resolve_helper(JavaThread *thread, | |
979 bool is_virtual, | |
980 bool is_optimized, TRAPS) { | |
981 methodHandle callee_method; | |
982 callee_method = resolve_sub_helper(thread, is_virtual, is_optimized, THREAD); | |
983 if (JvmtiExport::can_hotswap_or_post_breakpoint()) { | |
984 int retry_count = 0; | |
985 while (!HAS_PENDING_EXCEPTION && callee_method->is_old() && | |
1142 | 986 callee_method->method_holder() != SystemDictionary::Object_klass()) { |
0 | 987 // If has a pending exception then there is no need to re-try to |
988 // resolve this method. | |
989 // If the method has been redefined, we need to try again. | |
990 // Hack: we have no way to update the vtables of arrays, so don't | |
991 // require that java.lang.Object has been updated. | |
992 | |
993 // It is very unlikely that method is redefined more than 100 times | |
994 // in the middle of resolve. If it is looping here more than 100 times | |
995 // means then there could be a bug here. | |
996 guarantee((retry_count++ < 100), | |
997 "Could not resolve to latest version of redefined method"); | |
998 // method is redefined in the middle of resolve so re-try. | |
999 callee_method = resolve_sub_helper(thread, is_virtual, is_optimized, THREAD); | |
1000 } | |
1001 } | |
1002 return callee_method; | |
1003 } | |
1004 | |
1005 // Resolves a call. The compilers generate code for calls that go here | |
1006 // and are patched with the real destination of the call. | |
1007 methodHandle SharedRuntime::resolve_sub_helper(JavaThread *thread, | |
1008 bool is_virtual, | |
1009 bool is_optimized, TRAPS) { | |
1010 | |
1011 ResourceMark rm(thread); | |
1012 RegisterMap cbl_map(thread, false); | |
1013 frame caller_frame = thread->last_frame().sender(&cbl_map); | |
1014 | |
1295 | 1015 CodeBlob* caller_cb = caller_frame.cb(); |
1016 guarantee(caller_cb != NULL && caller_cb->is_nmethod(), "must be called from nmethod"); | |
1017 nmethod* caller_nm = caller_cb->as_nmethod_or_null(); | |
0 | 1018 // make sure caller is not getting deoptimized |
1019 // and removed before we are done with it. | |
1020 // CLEANUP - with lazy deopt shouldn't need this lock | |
1295 | 1021 nmethodLocker caller_lock(caller_nm); |
0 | 1022 |
1023 | |
1024 // determine call info & receiver | |
1025 // note: a) receiver is NULL for static calls | |
1026 // b) an exception is thrown if receiver is NULL for non-static calls | |
1027 CallInfo call_info; | |
1028 Bytecodes::Code invoke_code = Bytecodes::_illegal; | |
1029 Handle receiver = find_callee_info(thread, invoke_code, | |
1030 call_info, CHECK_(methodHandle())); | |
1031 methodHandle callee_method = call_info.selected_method(); | |
1032 | |
1033 assert((!is_virtual && invoke_code == Bytecodes::_invokestatic) || | |
1034 ( is_virtual && invoke_code != Bytecodes::_invokestatic), "inconsistent bytecode"); | |
1035 | |
1036 #ifndef PRODUCT | |
1037 // tracing/debugging/statistics | |
1038 int *addr = (is_optimized) ? (&_resolve_opt_virtual_ctr) : | |
1039 (is_virtual) ? (&_resolve_virtual_ctr) : | |
1040 (&_resolve_static_ctr); | |
1041 Atomic::inc(addr); | |
1042 | |
1043 if (TraceCallFixup) { | |
1044 ResourceMark rm(thread); | |
1045 tty->print("resolving %s%s (%s) call to", | |
1046 (is_optimized) ? "optimized " : "", (is_virtual) ? "virtual" : "static", | |
1047 Bytecodes::name(invoke_code)); | |
1048 callee_method->print_short_name(tty); | |
1049 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1050 } | |
1051 #endif | |
1052 | |
1295 | 1053 // JSR 292 |
1054 // If the resolved method is a MethodHandle invoke target the call | |
1055 // site must be a MethodHandle call site. | |
1056 if (callee_method->is_method_handle_invoke()) { | |
1057 assert(caller_nm->is_method_handle_return(caller_frame.pc()), "must be MH call site"); | |
1058 } | |
1059 | |
0 | 1060 // Compute entry points. This might require generation of C2I converter |
1061 // frames, so we cannot be holding any locks here. Furthermore, the | |
1062 // computation of the entry points is independent of patching the call. We | |
1063 // always return the entry-point, but we only patch the stub if the call has | |
1064 // not been deoptimized. Return values: For a virtual call this is an | |
1065 // (cached_oop, destination address) pair. For a static call/optimized | |
1066 // virtual this is just a destination address. | |
1067 | |
1068 StaticCallInfo static_call_info; | |
1069 CompiledICInfo virtual_call_info; | |
1070 | |
1071 // Make sure the callee nmethod does not get deoptimized and removed before | |
1072 // we are done patching the code. | |
1295 | 1073 nmethod* callee_nm = callee_method->code(); |
1074 nmethodLocker nl_callee(callee_nm); | |
0 | 1075 #ifdef ASSERT |
1295 | 1076 address dest_entry_point = callee_nm == NULL ? 0 : callee_nm->entry_point(); // used below |
0 | 1077 #endif |
1078 | |
1079 if (is_virtual) { | |
1080 assert(receiver.not_null(), "sanity check"); | |
1081 bool static_bound = call_info.resolved_method()->can_be_statically_bound(); | |
1082 KlassHandle h_klass(THREAD, receiver->klass()); | |
1083 CompiledIC::compute_monomorphic_entry(callee_method, h_klass, | |
1084 is_optimized, static_bound, virtual_call_info, | |
1085 CHECK_(methodHandle())); | |
1086 } else { | |
1087 // static call | |
1088 CompiledStaticCall::compute_entry(callee_method, static_call_info); | |
1089 } | |
1090 | |
1091 // grab lock, check for deoptimization and potentially patch caller | |
1092 { | |
1093 MutexLocker ml_patch(CompiledIC_lock); | |
1094 | |
1095 // Now that we are ready to patch if the methodOop was redefined then | |
1096 // don't update call site and let the caller retry. | |
1097 | |
1098 if (!callee_method->is_old()) { | |
1099 #ifdef ASSERT | |
1100 // We must not try to patch to jump to an already unloaded method. | |
1101 if (dest_entry_point != 0) { | |
1102 assert(CodeCache::find_blob(dest_entry_point) != NULL, | |
1103 "should not unload nmethod while locked"); | |
1104 } | |
1105 #endif | |
1106 if (is_virtual) { | |
1107 CompiledIC* inline_cache = CompiledIC_before(caller_frame.pc()); | |
1108 if (inline_cache->is_clean()) { | |
1109 inline_cache->set_to_monomorphic(virtual_call_info); | |
1110 } | |
1111 } else { | |
1112 CompiledStaticCall* ssc = compiledStaticCall_before(caller_frame.pc()); | |
1113 if (ssc->is_clean()) ssc->set(static_call_info); | |
1114 } | |
1115 } | |
1116 | |
1117 } // unlock CompiledIC_lock | |
1118 | |
1119 return callee_method; | |
1120 } | |
1121 | |
1122 | |
1123 // Inline caches exist only in compiled code | |
1124 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method_ic_miss(JavaThread* thread)) | |
1125 #ifdef ASSERT | |
1126 RegisterMap reg_map(thread, false); | |
1127 frame stub_frame = thread->last_frame(); | |
1128 assert(stub_frame.is_runtime_frame(), "sanity check"); | |
1129 frame caller_frame = stub_frame.sender(®_map); | |
1130 assert(!caller_frame.is_interpreted_frame() && !caller_frame.is_entry_frame(), "unexpected frame"); | |
1131 #endif /* ASSERT */ | |
1132 | |
1133 methodHandle callee_method; | |
1134 JRT_BLOCK | |
1135 callee_method = SharedRuntime::handle_ic_miss_helper(thread, CHECK_NULL); | |
1136 // Return methodOop through TLS | |
1137 thread->set_vm_result(callee_method()); | |
1138 JRT_BLOCK_END | |
1139 // return compiled code entry point after potential safepoints | |
1140 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
1141 return callee_method->verified_code_entry(); | |
1142 JRT_END | |
1143 | |
1144 | |
1145 // Handle call site that has been made non-entrant | |
1146 JRT_BLOCK_ENTRY(address, SharedRuntime::handle_wrong_method(JavaThread* thread)) | |
1147 // 6243940 We might end up in here if the callee is deoptimized | |
1148 // as we race to call it. We don't want to take a safepoint if | |
1149 // the caller was interpreted because the caller frame will look | |
1150 // interpreted to the stack walkers and arguments are now | |
1151 // "compiled" so it is much better to make this transition | |
1152 // invisible to the stack walking code. The i2c path will | |
1153 // place the callee method in the callee_target. It is stashed | |
1154 // there because if we try and find the callee by normal means a | |
1155 // safepoint is possible and have trouble gc'ing the compiled args. | |
1156 RegisterMap reg_map(thread, false); | |
1157 frame stub_frame = thread->last_frame(); | |
1158 assert(stub_frame.is_runtime_frame(), "sanity check"); | |
1159 frame caller_frame = stub_frame.sender(®_map); | |
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1160 |
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1161 // MethodHandle invokes don't have a CompiledIC and should always |
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1162 // simply redispatch to the callee_target. |
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1163 address sender_pc = caller_frame.pc(); |
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1164 CodeBlob* sender_cb = caller_frame.cb(); |
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1165 nmethod* sender_nm = sender_cb->as_nmethod_or_null(); |
1204 | 1166 bool is_mh_invoke_via_adapter = false; // Direct c2c call or via adapter? |
1167 if (sender_nm != NULL && sender_nm->is_method_handle_return(sender_pc)) { | |
1168 // If the callee_target is set, then we have come here via an i2c | |
1169 // adapter. | |
1170 methodOop callee = thread->callee_target(); | |
1171 if (callee != NULL) { | |
1172 assert(callee->is_method(), "sanity"); | |
1173 is_mh_invoke_via_adapter = true; | |
1174 } | |
1175 } | |
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1176 |
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1177 if (caller_frame.is_interpreted_frame() || |
1204 | 1178 caller_frame.is_entry_frame() || |
1179 is_mh_invoke_via_adapter) { | |
0 | 1180 methodOop callee = thread->callee_target(); |
1181 guarantee(callee != NULL && callee->is_method(), "bad handshake"); | |
1182 thread->set_vm_result(callee); | |
1183 thread->set_callee_target(NULL); | |
1184 return callee->get_c2i_entry(); | |
1185 } | |
1186 | |
1187 // Must be compiled to compiled path which is safe to stackwalk | |
1188 methodHandle callee_method; | |
1189 JRT_BLOCK | |
1190 // Force resolving of caller (if we called from compiled frame) | |
1191 callee_method = SharedRuntime::reresolve_call_site(thread, CHECK_NULL); | |
1192 thread->set_vm_result(callee_method()); | |
1193 JRT_BLOCK_END | |
1194 // return compiled code entry point after potential safepoints | |
1195 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
1196 return callee_method->verified_code_entry(); | |
1197 JRT_END | |
1198 | |
1199 | |
1200 // resolve a static call and patch code | |
1201 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_static_call_C(JavaThread *thread )) | |
1202 methodHandle callee_method; | |
1203 JRT_BLOCK | |
1204 callee_method = SharedRuntime::resolve_helper(thread, false, false, CHECK_NULL); | |
1205 thread->set_vm_result(callee_method()); | |
1206 JRT_BLOCK_END | |
1207 // return compiled code entry point after potential safepoints | |
1208 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
1209 return callee_method->verified_code_entry(); | |
1210 JRT_END | |
1211 | |
1212 | |
1213 // resolve virtual call and update inline cache to monomorphic | |
1214 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_virtual_call_C(JavaThread *thread )) | |
1215 methodHandle callee_method; | |
1216 JRT_BLOCK | |
1217 callee_method = SharedRuntime::resolve_helper(thread, true, false, CHECK_NULL); | |
1218 thread->set_vm_result(callee_method()); | |
1219 JRT_BLOCK_END | |
1220 // return compiled code entry point after potential safepoints | |
1221 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
1222 return callee_method->verified_code_entry(); | |
1223 JRT_END | |
1224 | |
1225 | |
1226 // Resolve a virtual call that can be statically bound (e.g., always | |
1227 // monomorphic, so it has no inline cache). Patch code to resolved target. | |
1228 JRT_BLOCK_ENTRY(address, SharedRuntime::resolve_opt_virtual_call_C(JavaThread *thread)) | |
1229 methodHandle callee_method; | |
1230 JRT_BLOCK | |
1231 callee_method = SharedRuntime::resolve_helper(thread, true, true, CHECK_NULL); | |
1232 thread->set_vm_result(callee_method()); | |
1233 JRT_BLOCK_END | |
1234 // return compiled code entry point after potential safepoints | |
1235 assert(callee_method->verified_code_entry() != NULL, " Jump to zero!"); | |
1236 return callee_method->verified_code_entry(); | |
1237 JRT_END | |
1238 | |
1239 | |
1240 | |
1241 | |
1242 | |
1243 methodHandle SharedRuntime::handle_ic_miss_helper(JavaThread *thread, TRAPS) { | |
1244 ResourceMark rm(thread); | |
1245 CallInfo call_info; | |
1246 Bytecodes::Code bc; | |
1247 | |
1248 // receiver is NULL for static calls. An exception is thrown for NULL | |
1249 // receivers for non-static calls | |
1250 Handle receiver = find_callee_info(thread, bc, call_info, | |
1251 CHECK_(methodHandle())); | |
1252 // Compiler1 can produce virtual call sites that can actually be statically bound | |
1253 // If we fell thru to below we would think that the site was going megamorphic | |
1254 // when in fact the site can never miss. Worse because we'd think it was megamorphic | |
1255 // we'd try and do a vtable dispatch however methods that can be statically bound | |
1256 // don't have vtable entries (vtable_index < 0) and we'd blow up. So we force a | |
1257 // reresolution of the call site (as if we did a handle_wrong_method and not an | |
1258 // plain ic_miss) and the site will be converted to an optimized virtual call site | |
1259 // never to miss again. I don't believe C2 will produce code like this but if it | |
1260 // did this would still be the correct thing to do for it too, hence no ifdef. | |
1261 // | |
1262 if (call_info.resolved_method()->can_be_statically_bound()) { | |
1263 methodHandle callee_method = SharedRuntime::reresolve_call_site(thread, CHECK_(methodHandle())); | |
1264 if (TraceCallFixup) { | |
1265 RegisterMap reg_map(thread, false); | |
1266 frame caller_frame = thread->last_frame().sender(®_map); | |
1267 ResourceMark rm(thread); | |
1268 tty->print("converting IC miss to reresolve (%s) call to", Bytecodes::name(bc)); | |
1269 callee_method->print_short_name(tty); | |
1270 tty->print_cr(" from pc: " INTPTR_FORMAT, caller_frame.pc()); | |
1271 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1272 } | |
1273 return callee_method; | |
1274 } | |
1275 | |
1276 methodHandle callee_method = call_info.selected_method(); | |
1277 | |
1278 bool should_be_mono = false; | |
1279 | |
1280 #ifndef PRODUCT | |
1281 Atomic::inc(&_ic_miss_ctr); | |
1282 | |
1283 // Statistics & Tracing | |
1284 if (TraceCallFixup) { | |
1285 ResourceMark rm(thread); | |
1286 tty->print("IC miss (%s) call to", Bytecodes::name(bc)); | |
1287 callee_method->print_short_name(tty); | |
1288 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1289 } | |
1290 | |
1291 if (ICMissHistogram) { | |
1292 MutexLocker m(VMStatistic_lock); | |
1293 RegisterMap reg_map(thread, false); | |
1294 frame f = thread->last_frame().real_sender(®_map);// skip runtime stub | |
1295 // produce statistics under the lock | |
1296 trace_ic_miss(f.pc()); | |
1297 } | |
1298 #endif | |
1299 | |
1300 // install an event collector so that when a vtable stub is created the | |
1301 // profiler can be notified via a DYNAMIC_CODE_GENERATED event. The | |
1302 // event can't be posted when the stub is created as locks are held | |
1303 // - instead the event will be deferred until the event collector goes | |
1304 // out of scope. | |
1305 JvmtiDynamicCodeEventCollector event_collector; | |
1306 | |
1307 // Update inline cache to megamorphic. Skip update if caller has been | |
1308 // made non-entrant or we are called from interpreted. | |
1309 { MutexLocker ml_patch (CompiledIC_lock); | |
1310 RegisterMap reg_map(thread, false); | |
1311 frame caller_frame = thread->last_frame().sender(®_map); | |
1312 CodeBlob* cb = caller_frame.cb(); | |
1313 if (cb->is_nmethod() && ((nmethod*)cb)->is_in_use()) { | |
1314 // Not a non-entrant nmethod, so find inline_cache | |
1315 CompiledIC* inline_cache = CompiledIC_before(caller_frame.pc()); | |
1316 bool should_be_mono = false; | |
1317 if (inline_cache->is_optimized()) { | |
1318 if (TraceCallFixup) { | |
1319 ResourceMark rm(thread); | |
1320 tty->print("OPTIMIZED IC miss (%s) call to", Bytecodes::name(bc)); | |
1321 callee_method->print_short_name(tty); | |
1322 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1323 } | |
1324 should_be_mono = true; | |
1325 } else { | |
1326 compiledICHolderOop ic_oop = (compiledICHolderOop) inline_cache->cached_oop(); | |
1327 if ( ic_oop != NULL && ic_oop->is_compiledICHolder()) { | |
1328 | |
1329 if (receiver()->klass() == ic_oop->holder_klass()) { | |
1330 // This isn't a real miss. We must have seen that compiled code | |
1331 // is now available and we want the call site converted to a | |
1332 // monomorphic compiled call site. | |
1333 // We can't assert for callee_method->code() != NULL because it | |
1334 // could have been deoptimized in the meantime | |
1335 if (TraceCallFixup) { | |
1336 ResourceMark rm(thread); | |
1337 tty->print("FALSE IC miss (%s) converting to compiled call to", Bytecodes::name(bc)); | |
1338 callee_method->print_short_name(tty); | |
1339 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1340 } | |
1341 should_be_mono = true; | |
1342 } | |
1343 } | |
1344 } | |
1345 | |
1346 if (should_be_mono) { | |
1347 | |
1348 // We have a path that was monomorphic but was going interpreted | |
1349 // and now we have (or had) a compiled entry. We correct the IC | |
1350 // by using a new icBuffer. | |
1351 CompiledICInfo info; | |
1352 KlassHandle receiver_klass(THREAD, receiver()->klass()); | |
1353 inline_cache->compute_monomorphic_entry(callee_method, | |
1354 receiver_klass, | |
1355 inline_cache->is_optimized(), | |
1356 false, | |
1357 info, CHECK_(methodHandle())); | |
1358 inline_cache->set_to_monomorphic(info); | |
1359 } else if (!inline_cache->is_megamorphic() && !inline_cache->is_clean()) { | |
1360 // Change to megamorphic | |
1361 inline_cache->set_to_megamorphic(&call_info, bc, CHECK_(methodHandle())); | |
1362 } else { | |
1363 // Either clean or megamorphic | |
1364 } | |
1365 } | |
1366 } // Release CompiledIC_lock | |
1367 | |
1368 return callee_method; | |
1369 } | |
1370 | |
1371 // | |
1372 // Resets a call-site in compiled code so it will get resolved again. | |
1373 // This routines handles both virtual call sites, optimized virtual call | |
1374 // sites, and static call sites. Typically used to change a call sites | |
1375 // destination from compiled to interpreted. | |
1376 // | |
1377 methodHandle SharedRuntime::reresolve_call_site(JavaThread *thread, TRAPS) { | |
1378 ResourceMark rm(thread); | |
1379 RegisterMap reg_map(thread, false); | |
1380 frame stub_frame = thread->last_frame(); | |
1381 assert(stub_frame.is_runtime_frame(), "must be a runtimeStub"); | |
1382 frame caller = stub_frame.sender(®_map); | |
1383 | |
1384 // Do nothing if the frame isn't a live compiled frame. | |
1385 // nmethod could be deoptimized by the time we get here | |
1386 // so no update to the caller is needed. | |
1387 | |
1388 if (caller.is_compiled_frame() && !caller.is_deoptimized_frame()) { | |
1389 | |
1390 address pc = caller.pc(); | |
1391 Events::log("update call-site at pc " INTPTR_FORMAT, pc); | |
1392 | |
1393 // Default call_addr is the location of the "basic" call. | |
1394 // Determine the address of the call we a reresolving. With | |
1395 // Inline Caches we will always find a recognizable call. | |
1396 // With Inline Caches disabled we may or may not find a | |
1397 // recognizable call. We will always find a call for static | |
1398 // calls and for optimized virtual calls. For vanilla virtual | |
1399 // calls it depends on the state of the UseInlineCaches switch. | |
1400 // | |
1401 // With Inline Caches disabled we can get here for a virtual call | |
1402 // for two reasons: | |
1403 // 1 - calling an abstract method. The vtable for abstract methods | |
1404 // will run us thru handle_wrong_method and we will eventually | |
1405 // end up in the interpreter to throw the ame. | |
1406 // 2 - a racing deoptimization. We could be doing a vanilla vtable | |
1407 // call and between the time we fetch the entry address and | |
1408 // we jump to it the target gets deoptimized. Similar to 1 | |
1409 // we will wind up in the interprter (thru a c2i with c2). | |
1410 // | |
1411 address call_addr = NULL; | |
1412 { | |
1413 // Get call instruction under lock because another thread may be | |
1414 // busy patching it. | |
1415 MutexLockerEx ml_patch(Patching_lock, Mutex::_no_safepoint_check_flag); | |
1416 // Location of call instruction | |
1417 if (NativeCall::is_call_before(pc)) { | |
1418 NativeCall *ncall = nativeCall_before(pc); | |
1419 call_addr = ncall->instruction_address(); | |
1420 } | |
1421 } | |
1422 | |
1423 // Check for static or virtual call | |
1424 bool is_static_call = false; | |
1425 nmethod* caller_nm = CodeCache::find_nmethod(pc); | |
1426 // Make sure nmethod doesn't get deoptimized and removed until | |
1427 // this is done with it. | |
1428 // CLEANUP - with lazy deopt shouldn't need this lock | |
1429 nmethodLocker nmlock(caller_nm); | |
1430 | |
1431 if (call_addr != NULL) { | |
1432 RelocIterator iter(caller_nm, call_addr, call_addr+1); | |
1433 int ret = iter.next(); // Get item | |
1434 if (ret) { | |
1435 assert(iter.addr() == call_addr, "must find call"); | |
1436 if (iter.type() == relocInfo::static_call_type) { | |
1437 is_static_call = true; | |
1438 } else { | |
1439 assert(iter.type() == relocInfo::virtual_call_type || | |
1440 iter.type() == relocInfo::opt_virtual_call_type | |
1441 , "unexpected relocInfo. type"); | |
1442 } | |
1443 } else { | |
1444 assert(!UseInlineCaches, "relocation info. must exist for this address"); | |
1445 } | |
1446 | |
1447 // Cleaning the inline cache will force a new resolve. This is more robust | |
1448 // than directly setting it to the new destination, since resolving of calls | |
1449 // is always done through the same code path. (experience shows that it | |
1450 // leads to very hard to track down bugs, if an inline cache gets updated | |
1451 // to a wrong method). It should not be performance critical, since the | |
1452 // resolve is only done once. | |
1453 | |
1454 MutexLocker ml(CompiledIC_lock); | |
1455 // | |
1456 // We do not patch the call site if the nmethod has been made non-entrant | |
1457 // as it is a waste of time | |
1458 // | |
1459 if (caller_nm->is_in_use()) { | |
1460 if (is_static_call) { | |
1461 CompiledStaticCall* ssc= compiledStaticCall_at(call_addr); | |
1462 ssc->set_to_clean(); | |
1463 } else { | |
1464 // compiled, dispatched call (which used to call an interpreted method) | |
1465 CompiledIC* inline_cache = CompiledIC_at(call_addr); | |
1466 inline_cache->set_to_clean(); | |
1467 } | |
1468 } | |
1469 } | |
1470 | |
1471 } | |
1472 | |
1473 methodHandle callee_method = find_callee_method(thread, CHECK_(methodHandle())); | |
1474 | |
1475 | |
1476 #ifndef PRODUCT | |
1477 Atomic::inc(&_wrong_method_ctr); | |
1478 | |
1479 if (TraceCallFixup) { | |
1480 ResourceMark rm(thread); | |
1481 tty->print("handle_wrong_method reresolving call to"); | |
1482 callee_method->print_short_name(tty); | |
1483 tty->print_cr(" code: " INTPTR_FORMAT, callee_method->code()); | |
1484 } | |
1485 #endif | |
1486 | |
1487 return callee_method; | |
1488 } | |
1489 | |
1490 // --------------------------------------------------------------------------- | |
1491 // We are calling the interpreter via a c2i. Normally this would mean that | |
1492 // we were called by a compiled method. However we could have lost a race | |
1493 // where we went int -> i2c -> c2i and so the caller could in fact be | |
1205 | 1494 // interpreted. If the caller is compiled we attempt to patch the caller |
0 | 1495 // so he no longer calls into the interpreter. |
1496 IRT_LEAF(void, SharedRuntime::fixup_callers_callsite(methodOopDesc* method, address caller_pc)) | |
1497 methodOop moop(method); | |
1498 | |
1499 address entry_point = moop->from_compiled_entry(); | |
1500 | |
1501 // It's possible that deoptimization can occur at a call site which hasn't | |
1502 // been resolved yet, in which case this function will be called from | |
1503 // an nmethod that has been patched for deopt and we can ignore the | |
1504 // request for a fixup. | |
1505 // Also it is possible that we lost a race in that from_compiled_entry | |
1506 // is now back to the i2c in that case we don't need to patch and if | |
1507 // we did we'd leap into space because the callsite needs to use | |
1508 // "to interpreter" stub in order to load up the methodOop. Don't | |
1509 // ask me how I know this... | |
1510 | |
1511 CodeBlob* cb = CodeCache::find_blob(caller_pc); | |
1205 | 1512 if (!cb->is_nmethod() || entry_point == moop->get_c2i_entry()) { |
1513 return; | |
1514 } | |
1515 | |
1516 // The check above makes sure this is a nmethod. | |
1517 nmethod* nm = cb->as_nmethod_or_null(); | |
1518 assert(nm, "must be"); | |
1519 | |
1520 // Don't fixup MethodHandle call sites as c2i/i2c adapters are used | |
1521 // to implement MethodHandle actions. | |
1522 if (nm->is_method_handle_return(caller_pc)) { | |
0 | 1523 return; |
1524 } | |
1525 | |
1526 // There is a benign race here. We could be attempting to patch to a compiled | |
1527 // entry point at the same time the callee is being deoptimized. If that is | |
1528 // the case then entry_point may in fact point to a c2i and we'd patch the | |
1529 // call site with the same old data. clear_code will set code() to NULL | |
1530 // at the end of it. If we happen to see that NULL then we can skip trying | |
1531 // to patch. If we hit the window where the callee has a c2i in the | |
1532 // from_compiled_entry and the NULL isn't present yet then we lose the race | |
1533 // and patch the code with the same old data. Asi es la vida. | |
1534 | |
1535 if (moop->code() == NULL) return; | |
1536 | |
1205 | 1537 if (nm->is_in_use()) { |
0 | 1538 |
1539 // Expect to find a native call there (unless it was no-inline cache vtable dispatch) | |
1540 MutexLockerEx ml_patch(Patching_lock, Mutex::_no_safepoint_check_flag); | |
1541 if (NativeCall::is_call_before(caller_pc + frame::pc_return_offset)) { | |
1542 NativeCall *call = nativeCall_before(caller_pc + frame::pc_return_offset); | |
1543 // | |
1544 // bug 6281185. We might get here after resolving a call site to a vanilla | |
1545 // virtual call. Because the resolvee uses the verified entry it may then | |
1546 // see compiled code and attempt to patch the site by calling us. This would | |
1547 // then incorrectly convert the call site to optimized and its downhill from | |
1548 // there. If you're lucky you'll get the assert in the bugid, if not you've | |
1549 // just made a call site that could be megamorphic into a monomorphic site | |
1550 // for the rest of its life! Just another racing bug in the life of | |
1551 // fixup_callers_callsite ... | |
1552 // | |
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1553 RelocIterator iter(nm, call->instruction_address(), call->next_instruction_address()); |
0 | 1554 iter.next(); |
1555 assert(iter.has_current(), "must have a reloc at java call site"); | |
1556 relocInfo::relocType typ = iter.reloc()->type(); | |
1557 if ( typ != relocInfo::static_call_type && | |
1558 typ != relocInfo::opt_virtual_call_type && | |
1559 typ != relocInfo::static_stub_type) { | |
1560 return; | |
1561 } | |
1562 address destination = call->destination(); | |
1563 if (destination != entry_point) { | |
1564 CodeBlob* callee = CodeCache::find_blob(destination); | |
1565 // callee == cb seems weird. It means calling interpreter thru stub. | |
1566 if (callee == cb || callee->is_adapter_blob()) { | |
1567 // static call or optimized virtual | |
1568 if (TraceCallFixup) { | |
1204 | 1569 tty->print("fixup callsite at " INTPTR_FORMAT " to compiled code for", caller_pc); |
0 | 1570 moop->print_short_name(tty); |
1571 tty->print_cr(" to " INTPTR_FORMAT, entry_point); | |
1572 } | |
1573 call->set_destination_mt_safe(entry_point); | |
1574 } else { | |
1575 if (TraceCallFixup) { | |
1576 tty->print("failed to fixup callsite at " INTPTR_FORMAT " to compiled code for", caller_pc); | |
1577 moop->print_short_name(tty); | |
1578 tty->print_cr(" to " INTPTR_FORMAT, entry_point); | |
1579 } | |
1580 // assert is too strong could also be resolve destinations. | |
1581 // assert(InlineCacheBuffer::contains(destination) || VtableStubs::contains(destination), "must be"); | |
1582 } | |
1583 } else { | |
1584 if (TraceCallFixup) { | |
1204 | 1585 tty->print("already patched callsite at " INTPTR_FORMAT " to compiled code for", caller_pc); |
0 | 1586 moop->print_short_name(tty); |
1587 tty->print_cr(" to " INTPTR_FORMAT, entry_point); | |
1588 } | |
1589 } | |
1590 } | |
1591 } | |
1592 | |
1593 IRT_END | |
1594 | |
1595 | |
1596 // same as JVM_Arraycopy, but called directly from compiled code | |
1597 JRT_ENTRY(void, SharedRuntime::slow_arraycopy_C(oopDesc* src, jint src_pos, | |
1598 oopDesc* dest, jint dest_pos, | |
1599 jint length, | |
1600 JavaThread* thread)) { | |
1601 #ifndef PRODUCT | |
1602 _slow_array_copy_ctr++; | |
1603 #endif | |
1604 // Check if we have null pointers | |
1605 if (src == NULL || dest == NULL) { | |
1606 THROW(vmSymbols::java_lang_NullPointerException()); | |
1607 } | |
1608 // Do the copy. The casts to arrayOop are necessary to the copy_array API, | |
1609 // even though the copy_array API also performs dynamic checks to ensure | |
1610 // that src and dest are truly arrays (and are conformable). | |
1611 // The copy_array mechanism is awkward and could be removed, but | |
1612 // the compilers don't call this function except as a last resort, | |
1613 // so it probably doesn't matter. | |
1614 Klass::cast(src->klass())->copy_array((arrayOopDesc*)src, src_pos, | |
1615 (arrayOopDesc*)dest, dest_pos, | |
1616 length, thread); | |
1617 } | |
1618 JRT_END | |
1619 | |
1620 char* SharedRuntime::generate_class_cast_message( | |
1621 JavaThread* thread, const char* objName) { | |
1622 | |
1623 // Get target class name from the checkcast instruction | |
1624 vframeStream vfst(thread, true); | |
1625 assert(!vfst.at_end(), "Java frame must exist"); | |
1626 Bytecode_checkcast* cc = Bytecode_checkcast_at( | |
1627 vfst.method()->bcp_from(vfst.bci())); | |
1628 Klass* targetKlass = Klass::cast(vfst.method()->constants()->klass_at( | |
1629 cc->index(), thread)); | |
1630 return generate_class_cast_message(objName, targetKlass->external_name()); | |
1631 } | |
1632 | |
710 | 1633 char* SharedRuntime::generate_wrong_method_type_message(JavaThread* thread, |
1634 oopDesc* required, | |
1635 oopDesc* actual) { | |
1793
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1636 if (TraceMethodHandles) { |
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1637 tty->print_cr("WrongMethodType thread="PTR_FORMAT" req="PTR_FORMAT" act="PTR_FORMAT"", |
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1638 thread, required, actual); |
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|
1639 } |
710 | 1640 assert(EnableMethodHandles, ""); |
1641 oop singleKlass = wrong_method_type_is_for_single_argument(thread, required); | |
1793
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1642 char* message = NULL; |
710 | 1643 if (singleKlass != NULL) { |
1644 const char* objName = "argument or return value"; | |
1645 if (actual != NULL) { | |
1646 // be flexible about the junk passed in: | |
1647 klassOop ak = (actual->is_klass() | |
1648 ? (klassOop)actual | |
1649 : actual->klass()); | |
1650 objName = Klass::cast(ak)->external_name(); | |
1651 } | |
1652 Klass* targetKlass = Klass::cast(required->is_klass() | |
1653 ? (klassOop)required | |
1654 : java_lang_Class::as_klassOop(required)); | |
1793
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1655 message = generate_class_cast_message(objName, targetKlass->external_name()); |
710 | 1656 } else { |
1657 // %%% need to get the MethodType string, without messing around too much | |
1658 // Get a signature from the invoke instruction | |
1659 const char* mhName = "method handle"; | |
1660 const char* targetType = "the required signature"; | |
1661 vframeStream vfst(thread, true); | |
1662 if (!vfst.at_end()) { | |
1663 Bytecode_invoke* call = Bytecode_invoke_at(vfst.method(), vfst.bci()); | |
1664 methodHandle target; | |
1665 { | |
1666 EXCEPTION_MARK; | |
1667 target = call->static_target(THREAD); | |
1668 if (HAS_PENDING_EXCEPTION) { CLEAR_PENDING_EXCEPTION; } | |
1669 } | |
1670 if (target.not_null() | |
1671 && target->is_method_handle_invoke() | |
1672 && required == target->method_handle_type()) { | |
1673 targetType = target->signature()->as_C_string(); | |
1674 } | |
1675 } | |
1676 klassOop kignore; int fignore; | |
1677 methodOop actual_method = MethodHandles::decode_method(actual, | |
1678 kignore, fignore); | |
1679 if (actual_method != NULL) { | |
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1680 if (methodOopDesc::is_method_handle_invoke_name(actual_method->name())) |
710 | 1681 mhName = "$"; |
1682 else | |
1683 mhName = actual_method->signature()->as_C_string(); | |
1684 if (mhName[0] == '$') | |
1685 mhName = actual_method->signature()->as_C_string(); | |
1686 } | |
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1687 message = generate_class_cast_message(mhName, targetType, |
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1688 " cannot be called as "); |
710 | 1689 } |
1793
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1690 if (TraceMethodHandles) { |
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1691 tty->print_cr("WrongMethodType => message=%s", message); |
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1692 } |
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1693 return message; |
710 | 1694 } |
1695 | |
1696 oop SharedRuntime::wrong_method_type_is_for_single_argument(JavaThread* thr, | |
1697 oopDesc* required) { | |
1698 if (required == NULL) return NULL; | |
1142 | 1699 if (required->klass() == SystemDictionary::Class_klass()) |
710 | 1700 return required; |
1701 if (required->is_klass()) | |
1702 return Klass::cast(klassOop(required))->java_mirror(); | |
1703 return NULL; | |
1704 } | |
1705 | |
1706 | |
0 | 1707 char* SharedRuntime::generate_class_cast_message( |
710 | 1708 const char* objName, const char* targetKlassName, const char* desc) { |
0 | 1709 size_t msglen = strlen(objName) + strlen(desc) + strlen(targetKlassName) + 1; |
1710 | |
53 | 1711 char* message = NEW_RESOURCE_ARRAY(char, msglen); |
0 | 1712 if (NULL == message) { |
53 | 1713 // Shouldn't happen, but don't cause even more problems if it does |
0 | 1714 message = const_cast<char*>(objName); |
1715 } else { | |
1716 jio_snprintf(message, msglen, "%s%s%s", objName, desc, targetKlassName); | |
1717 } | |
1718 return message; | |
1719 } | |
1720 | |
1721 JRT_LEAF(void, SharedRuntime::reguard_yellow_pages()) | |
1722 (void) JavaThread::current()->reguard_stack(); | |
1723 JRT_END | |
1724 | |
1725 | |
1726 // Handles the uncommon case in locking, i.e., contention or an inflated lock. | |
1727 #ifndef PRODUCT | |
1728 int SharedRuntime::_monitor_enter_ctr=0; | |
1729 #endif | |
1730 JRT_ENTRY_NO_ASYNC(void, SharedRuntime::complete_monitor_locking_C(oopDesc* _obj, BasicLock* lock, JavaThread* thread)) | |
1731 oop obj(_obj); | |
1732 #ifndef PRODUCT | |
1733 _monitor_enter_ctr++; // monitor enter slow | |
1734 #endif | |
1735 if (PrintBiasedLockingStatistics) { | |
1736 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); | |
1737 } | |
1738 Handle h_obj(THREAD, obj); | |
1739 if (UseBiasedLocking) { | |
1740 // Retry fast entry if bias is revoked to avoid unnecessary inflation | |
1741 ObjectSynchronizer::fast_enter(h_obj, lock, true, CHECK); | |
1742 } else { | |
1743 ObjectSynchronizer::slow_enter(h_obj, lock, CHECK); | |
1744 } | |
1745 assert(!HAS_PENDING_EXCEPTION, "Should have no exception here"); | |
1746 JRT_END | |
1747 | |
1748 #ifndef PRODUCT | |
1749 int SharedRuntime::_monitor_exit_ctr=0; | |
1750 #endif | |
1751 // Handles the uncommon cases of monitor unlocking in compiled code | |
1752 JRT_LEAF(void, SharedRuntime::complete_monitor_unlocking_C(oopDesc* _obj, BasicLock* lock)) | |
1753 oop obj(_obj); | |
1754 #ifndef PRODUCT | |
1755 _monitor_exit_ctr++; // monitor exit slow | |
1756 #endif | |
1757 Thread* THREAD = JavaThread::current(); | |
1758 // I'm not convinced we need the code contained by MIGHT_HAVE_PENDING anymore | |
1759 // testing was unable to ever fire the assert that guarded it so I have removed it. | |
1760 assert(!HAS_PENDING_EXCEPTION, "Do we need code below anymore?"); | |
1761 #undef MIGHT_HAVE_PENDING | |
1762 #ifdef MIGHT_HAVE_PENDING | |
1763 // Save and restore any pending_exception around the exception mark. | |
1764 // While the slow_exit must not throw an exception, we could come into | |
1765 // this routine with one set. | |
1766 oop pending_excep = NULL; | |
1767 const char* pending_file; | |
1768 int pending_line; | |
1769 if (HAS_PENDING_EXCEPTION) { | |
1770 pending_excep = PENDING_EXCEPTION; | |
1771 pending_file = THREAD->exception_file(); | |
1772 pending_line = THREAD->exception_line(); | |
1773 CLEAR_PENDING_EXCEPTION; | |
1774 } | |
1775 #endif /* MIGHT_HAVE_PENDING */ | |
1776 | |
1777 { | |
1778 // Exit must be non-blocking, and therefore no exceptions can be thrown. | |
1779 EXCEPTION_MARK; | |
1780 ObjectSynchronizer::slow_exit(obj, lock, THREAD); | |
1781 } | |
1782 | |
1783 #ifdef MIGHT_HAVE_PENDING | |
1784 if (pending_excep != NULL) { | |
1785 THREAD->set_pending_exception(pending_excep, pending_file, pending_line); | |
1786 } | |
1787 #endif /* MIGHT_HAVE_PENDING */ | |
1788 JRT_END | |
1789 | |
1790 #ifndef PRODUCT | |
1791 | |
1792 void SharedRuntime::print_statistics() { | |
1793 ttyLocker ttyl; | |
1794 if (xtty != NULL) xtty->head("statistics type='SharedRuntime'"); | |
1795 | |
1796 if (_monitor_enter_ctr ) tty->print_cr("%5d monitor enter slow", _monitor_enter_ctr); | |
1797 if (_monitor_exit_ctr ) tty->print_cr("%5d monitor exit slow", _monitor_exit_ctr); | |
1798 if (_throw_null_ctr) tty->print_cr("%5d implicit null throw", _throw_null_ctr); | |
1799 | |
1800 SharedRuntime::print_ic_miss_histogram(); | |
1801 | |
1802 if (CountRemovableExceptions) { | |
1803 if (_nof_removable_exceptions > 0) { | |
1804 Unimplemented(); // this counter is not yet incremented | |
1805 tty->print_cr("Removable exceptions: %d", _nof_removable_exceptions); | |
1806 } | |
1807 } | |
1808 | |
1809 // Dump the JRT_ENTRY counters | |
1810 if( _new_instance_ctr ) tty->print_cr("%5d new instance requires GC", _new_instance_ctr); | |
1811 if( _new_array_ctr ) tty->print_cr("%5d new array requires GC", _new_array_ctr); | |
1812 if( _multi1_ctr ) tty->print_cr("%5d multianewarray 1 dim", _multi1_ctr); | |
1813 if( _multi2_ctr ) tty->print_cr("%5d multianewarray 2 dim", _multi2_ctr); | |
1814 if( _multi3_ctr ) tty->print_cr("%5d multianewarray 3 dim", _multi3_ctr); | |
1815 if( _multi4_ctr ) tty->print_cr("%5d multianewarray 4 dim", _multi4_ctr); | |
1816 if( _multi5_ctr ) tty->print_cr("%5d multianewarray 5 dim", _multi5_ctr); | |
1817 | |
1818 tty->print_cr("%5d inline cache miss in compiled", _ic_miss_ctr ); | |
1819 tty->print_cr("%5d wrong method", _wrong_method_ctr ); | |
1820 tty->print_cr("%5d unresolved static call site", _resolve_static_ctr ); | |
1821 tty->print_cr("%5d unresolved virtual call site", _resolve_virtual_ctr ); | |
1822 tty->print_cr("%5d unresolved opt virtual call site", _resolve_opt_virtual_ctr ); | |
1823 | |
1824 if( _mon_enter_stub_ctr ) tty->print_cr("%5d monitor enter stub", _mon_enter_stub_ctr ); | |
1825 if( _mon_exit_stub_ctr ) tty->print_cr("%5d monitor exit stub", _mon_exit_stub_ctr ); | |
1826 if( _mon_enter_ctr ) tty->print_cr("%5d monitor enter slow", _mon_enter_ctr ); | |
1827 if( _mon_exit_ctr ) tty->print_cr("%5d monitor exit slow", _mon_exit_ctr ); | |
1828 if( _partial_subtype_ctr) tty->print_cr("%5d slow partial subtype", _partial_subtype_ctr ); | |
1829 if( _jbyte_array_copy_ctr ) tty->print_cr("%5d byte array copies", _jbyte_array_copy_ctr ); | |
1830 if( _jshort_array_copy_ctr ) tty->print_cr("%5d short array copies", _jshort_array_copy_ctr ); | |
1831 if( _jint_array_copy_ctr ) tty->print_cr("%5d int array copies", _jint_array_copy_ctr ); | |
1832 if( _jlong_array_copy_ctr ) tty->print_cr("%5d long array copies", _jlong_array_copy_ctr ); | |
1833 if( _oop_array_copy_ctr ) tty->print_cr("%5d oop array copies", _oop_array_copy_ctr ); | |
1834 if( _checkcast_array_copy_ctr ) tty->print_cr("%5d checkcast array copies", _checkcast_array_copy_ctr ); | |
1835 if( _unsafe_array_copy_ctr ) tty->print_cr("%5d unsafe array copies", _unsafe_array_copy_ctr ); | |
1836 if( _generic_array_copy_ctr ) tty->print_cr("%5d generic array copies", _generic_array_copy_ctr ); | |
1837 if( _slow_array_copy_ctr ) tty->print_cr("%5d slow array copies", _slow_array_copy_ctr ); | |
1838 if( _find_handler_ctr ) tty->print_cr("%5d find exception handler", _find_handler_ctr ); | |
1839 if( _rethrow_ctr ) tty->print_cr("%5d rethrow handler", _rethrow_ctr ); | |
1840 | |
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1841 AdapterHandlerLibrary::print_statistics(); |
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1842 |
0 | 1843 if (xtty != NULL) xtty->tail("statistics"); |
1844 } | |
1845 | |
1846 inline double percent(int x, int y) { | |
1847 return 100.0 * x / MAX2(y, 1); | |
1848 } | |
1849 | |
1850 class MethodArityHistogram { | |
1851 public: | |
1852 enum { MAX_ARITY = 256 }; | |
1853 private: | |
1854 static int _arity_histogram[MAX_ARITY]; // histogram of #args | |
1855 static int _size_histogram[MAX_ARITY]; // histogram of arg size in words | |
1856 static int _max_arity; // max. arity seen | |
1857 static int _max_size; // max. arg size seen | |
1858 | |
1859 static void add_method_to_histogram(nmethod* nm) { | |
1860 methodOop m = nm->method(); | |
1861 ArgumentCount args(m->signature()); | |
1862 int arity = args.size() + (m->is_static() ? 0 : 1); | |
1863 int argsize = m->size_of_parameters(); | |
1864 arity = MIN2(arity, MAX_ARITY-1); | |
1865 argsize = MIN2(argsize, MAX_ARITY-1); | |
1866 int count = nm->method()->compiled_invocation_count(); | |
1867 _arity_histogram[arity] += count; | |
1868 _size_histogram[argsize] += count; | |
1869 _max_arity = MAX2(_max_arity, arity); | |
1870 _max_size = MAX2(_max_size, argsize); | |
1871 } | |
1872 | |
1873 void print_histogram_helper(int n, int* histo, const char* name) { | |
1874 const int N = MIN2(5, n); | |
1875 tty->print_cr("\nHistogram of call arity (incl. rcvr, calls to compiled methods only):"); | |
1876 double sum = 0; | |
1877 double weighted_sum = 0; | |
1878 int i; | |
1879 for (i = 0; i <= n; i++) { sum += histo[i]; weighted_sum += i*histo[i]; } | |
1880 double rest = sum; | |
1881 double percent = sum / 100; | |
1882 for (i = 0; i <= N; i++) { | |
1883 rest -= histo[i]; | |
1884 tty->print_cr("%4d: %7d (%5.1f%%)", i, histo[i], histo[i] / percent); | |
1885 } | |
1886 tty->print_cr("rest: %7d (%5.1f%%))", (int)rest, rest / percent); | |
1887 tty->print_cr("(avg. %s = %3.1f, max = %d)", name, weighted_sum / sum, n); | |
1888 } | |
1889 | |
1890 void print_histogram() { | |
1891 tty->print_cr("\nHistogram of call arity (incl. rcvr, calls to compiled methods only):"); | |
1892 print_histogram_helper(_max_arity, _arity_histogram, "arity"); | |
1893 tty->print_cr("\nSame for parameter size (in words):"); | |
1894 print_histogram_helper(_max_size, _size_histogram, "size"); | |
1895 tty->cr(); | |
1896 } | |
1897 | |
1898 public: | |
1899 MethodArityHistogram() { | |
1900 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
1901 _max_arity = _max_size = 0; | |
1902 for (int i = 0; i < MAX_ARITY; i++) _arity_histogram[i] = _size_histogram [i] = 0; | |
1903 CodeCache::nmethods_do(add_method_to_histogram); | |
1904 print_histogram(); | |
1905 } | |
1906 }; | |
1907 | |
1908 int MethodArityHistogram::_arity_histogram[MethodArityHistogram::MAX_ARITY]; | |
1909 int MethodArityHistogram::_size_histogram[MethodArityHistogram::MAX_ARITY]; | |
1910 int MethodArityHistogram::_max_arity; | |
1911 int MethodArityHistogram::_max_size; | |
1912 | |
1913 void SharedRuntime::print_call_statistics(int comp_total) { | |
1914 tty->print_cr("Calls from compiled code:"); | |
1915 int total = _nof_normal_calls + _nof_interface_calls + _nof_static_calls; | |
1916 int mono_c = _nof_normal_calls - _nof_optimized_calls - _nof_megamorphic_calls; | |
1917 int mono_i = _nof_interface_calls - _nof_optimized_interface_calls - _nof_megamorphic_interface_calls; | |
1918 tty->print_cr("\t%9d (%4.1f%%) total non-inlined ", total, percent(total, total)); | |
1919 tty->print_cr("\t%9d (%4.1f%%) virtual calls ", _nof_normal_calls, percent(_nof_normal_calls, total)); | |
1920 tty->print_cr("\t %9d (%3.0f%%) inlined ", _nof_inlined_calls, percent(_nof_inlined_calls, _nof_normal_calls)); | |
1921 tty->print_cr("\t %9d (%3.0f%%) optimized ", _nof_optimized_calls, percent(_nof_optimized_calls, _nof_normal_calls)); | |
1922 tty->print_cr("\t %9d (%3.0f%%) monomorphic ", mono_c, percent(mono_c, _nof_normal_calls)); | |
1923 tty->print_cr("\t %9d (%3.0f%%) megamorphic ", _nof_megamorphic_calls, percent(_nof_megamorphic_calls, _nof_normal_calls)); | |
1924 tty->print_cr("\t%9d (%4.1f%%) interface calls ", _nof_interface_calls, percent(_nof_interface_calls, total)); | |
1925 tty->print_cr("\t %9d (%3.0f%%) inlined ", _nof_inlined_interface_calls, percent(_nof_inlined_interface_calls, _nof_interface_calls)); | |
1926 tty->print_cr("\t %9d (%3.0f%%) optimized ", _nof_optimized_interface_calls, percent(_nof_optimized_interface_calls, _nof_interface_calls)); | |
1927 tty->print_cr("\t %9d (%3.0f%%) monomorphic ", mono_i, percent(mono_i, _nof_interface_calls)); | |
1928 tty->print_cr("\t %9d (%3.0f%%) megamorphic ", _nof_megamorphic_interface_calls, percent(_nof_megamorphic_interface_calls, _nof_interface_calls)); | |
1929 tty->print_cr("\t%9d (%4.1f%%) static/special calls", _nof_static_calls, percent(_nof_static_calls, total)); | |
1930 tty->print_cr("\t %9d (%3.0f%%) inlined ", _nof_inlined_static_calls, percent(_nof_inlined_static_calls, _nof_static_calls)); | |
1931 tty->cr(); | |
1932 tty->print_cr("Note 1: counter updates are not MT-safe."); | |
1933 tty->print_cr("Note 2: %% in major categories are relative to total non-inlined calls;"); | |
1934 tty->print_cr(" %% in nested categories are relative to their category"); | |
1935 tty->print_cr(" (and thus add up to more than 100%% with inlining)"); | |
1936 tty->cr(); | |
1937 | |
1938 MethodArityHistogram h; | |
1939 } | |
1940 #endif | |
1941 | |
1942 | |
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1943 // A simple wrapper class around the calling convention information |
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1944 // that allows sharing of adapters for the same calling convention. |
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1945 class AdapterFingerPrint : public CHeapObj { |
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1946 private: |
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1947 union { |
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1948 int _compact[3]; |
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1949 int* _fingerprint; |
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1950 } _value; |
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1951 int _length; // A negative length indicates the fingerprint is in the compact form, |
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1952 // Otherwise _value._fingerprint is the array. |
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1953 |
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1954 // Remap BasicTypes that are handled equivalently by the adapters. |
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1955 // These are correct for the current system but someday it might be |
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1956 // necessary to make this mapping platform dependent. |
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1957 static BasicType adapter_encoding(BasicType in) { |
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1958 assert((~0xf & in) == 0, "must fit in 4 bits"); |
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1959 switch(in) { |
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1960 case T_BOOLEAN: |
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1961 case T_BYTE: |
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1962 case T_SHORT: |
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1963 case T_CHAR: |
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1964 // There are all promoted to T_INT in the calling convention |
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1965 return T_INT; |
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1966 |
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1967 case T_OBJECT: |
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1968 case T_ARRAY: |
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1969 #ifdef _LP64 |
1506 | 1970 return T_LONG; |
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1971 #else |
1506 | 1972 return T_INT; |
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1973 #endif |
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1974 |
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1975 case T_INT: |
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1976 case T_LONG: |
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1977 case T_FLOAT: |
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1978 case T_DOUBLE: |
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1979 case T_VOID: |
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1980 return in; |
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1981 |
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1982 default: |
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1983 ShouldNotReachHere(); |
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1984 return T_CONFLICT; |
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1985 } |
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1986 } |
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1987 |
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1988 public: |
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1989 AdapterFingerPrint(int total_args_passed, BasicType* sig_bt) { |
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1990 // The fingerprint is based on the BasicType signature encoded |
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1991 // into an array of ints with four entries per int. |
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1992 int* ptr; |
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1993 int len = (total_args_passed + 3) >> 2; |
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1994 if (len <= (int)(sizeof(_value._compact) / sizeof(int))) { |
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1995 _value._compact[0] = _value._compact[1] = _value._compact[2] = 0; |
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1996 // Storing the signature encoded as signed chars hits about 98% |
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1997 // of the time. |
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1998 _length = -len; |
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1999 ptr = _value._compact; |
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2000 } else { |
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2001 _length = len; |
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2002 _value._fingerprint = NEW_C_HEAP_ARRAY(int, _length); |
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2003 ptr = _value._fingerprint; |
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2004 } |
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2005 |
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2006 // Now pack the BasicTypes with 4 per int |
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2007 int sig_index = 0; |
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2008 for (int index = 0; index < len; index++) { |
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2009 int value = 0; |
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2010 for (int byte = 0; byte < 4; byte++) { |
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2011 if (sig_index < total_args_passed) { |
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2012 value = (value << 4) | adapter_encoding(sig_bt[sig_index++]); |
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2013 } |
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2014 } |
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2015 ptr[index] = value; |
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2016 } |
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2017 } |
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2018 |
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2019 ~AdapterFingerPrint() { |
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2020 if (_length > 0) { |
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2021 FREE_C_HEAP_ARRAY(int, _value._fingerprint); |
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2022 } |
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2023 } |
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2024 |
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2025 int value(int index) { |
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2026 if (_length < 0) { |
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2027 return _value._compact[index]; |
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2028 } |
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2029 return _value._fingerprint[index]; |
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never
parents:
1142
diff
changeset
|
2030 } |
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never
parents:
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diff
changeset
|
2031 int length() { |
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never
parents:
1142
diff
changeset
|
2032 if (_length < 0) return -_length; |
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6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2033 return _length; |
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never
parents:
1142
diff
changeset
|
2034 } |
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never
parents:
1142
diff
changeset
|
2035 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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parents:
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diff
changeset
|
2036 bool is_compact() { |
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never
parents:
1142
diff
changeset
|
2037 return _length <= 0; |
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never
parents:
1142
diff
changeset
|
2038 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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parents:
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diff
changeset
|
2039 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
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diff
changeset
|
2040 unsigned int compute_hash() { |
1207
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diff
changeset
|
2041 int hash = 0; |
1187
cf0685d550f1
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parents:
1142
diff
changeset
|
2042 for (int i = 0; i < length(); i++) { |
1207
74c848d437ab
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1205
diff
changeset
|
2043 int v = value(i); |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2044 hash = (hash << 8) ^ v ^ (hash >> 5); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2045 } |
cf0685d550f1
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never
parents:
1142
diff
changeset
|
2046 return (unsigned int)hash; |
cf0685d550f1
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never
parents:
1142
diff
changeset
|
2047 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2048 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2049 const char* as_string() { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2050 stringStream st; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2051 for (int i = 0; i < length(); i++) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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1142
diff
changeset
|
2052 st.print(PTR_FORMAT, value(i)); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2053 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2054 return st.as_string(); |
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never
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diff
changeset
|
2055 } |
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6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2056 |
cf0685d550f1
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diff
changeset
|
2057 bool equals(AdapterFingerPrint* other) { |
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6911204: generated adapters with large signatures can fill up the code cache
never
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diff
changeset
|
2058 if (other->_length != _length) { |
cf0685d550f1
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never
parents:
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diff
changeset
|
2059 return false; |
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diff
changeset
|
2060 } |
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diff
changeset
|
2061 if (_length < 0) { |
1207
74c848d437ab
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diff
changeset
|
2062 return _value._compact[0] == other->_value._compact[0] && |
74c848d437ab
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1205
diff
changeset
|
2063 _value._compact[1] == other->_value._compact[1] && |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
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|
2064 _value._compact[2] == other->_value._compact[2]; |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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diff
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|
2065 } else { |
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1142
diff
changeset
|
2066 for (int i = 0; i < _length; i++) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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changeset
|
2067 if (_value._fingerprint[i] != other->_value._fingerprint[i]) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2068 return false; |
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never
parents:
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diff
changeset
|
2069 } |
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never
parents:
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diff
changeset
|
2070 } |
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never
parents:
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diff
changeset
|
2071 } |
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never
parents:
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diff
changeset
|
2072 return true; |
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parents:
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diff
changeset
|
2073 } |
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never
parents:
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diff
changeset
|
2074 }; |
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parents:
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diff
changeset
|
2075 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2076 |
cf0685d550f1
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diff
changeset
|
2077 // A hashtable mapping from AdapterFingerPrints to AdapterHandlerEntries |
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never
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diff
changeset
|
2078 class AdapterHandlerTable : public BasicHashtable { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
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diff
changeset
|
2079 friend class AdapterHandlerTableIterator; |
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never
parents:
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diff
changeset
|
2080 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
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diff
changeset
|
2081 private: |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2082 |
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
kvn
parents:
1257
diff
changeset
|
2083 #ifndef PRODUCT |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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diff
changeset
|
2084 static int _lookups; // number of calls to lookup |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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diff
changeset
|
2085 static int _buckets; // number of buckets checked |
cf0685d550f1
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diff
changeset
|
2086 static int _equals; // number of buckets checked with matching hash |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
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diff
changeset
|
2087 static int _hits; // number of successful lookups |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
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diff
changeset
|
2088 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
|
2089 #endif |
cf0685d550f1
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never
parents:
1142
diff
changeset
|
2090 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2091 AdapterHandlerEntry* bucket(int i) { |
cf0685d550f1
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never
parents:
1142
diff
changeset
|
2092 return (AdapterHandlerEntry*)BasicHashtable::bucket(i); |
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6911204: generated adapters with large signatures can fill up the code cache
never
parents:
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diff
changeset
|
2093 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2094 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2095 public: |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2096 AdapterHandlerTable() |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2097 : BasicHashtable(293, sizeof(AdapterHandlerEntry)) { } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2098 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2099 // 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
|
2100 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
|
2101 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
|
2102 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
|
2103 return entry; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2104 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2105 |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2106 // Insert an entry into the table |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2107 void add(AdapterHandlerEntry* entry) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2108 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
|
2109 add_entry(index, entry); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2110 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2111 |
1207
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2112 void free_entry(AdapterHandlerEntry* entry) { |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2113 entry->deallocate(); |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2114 BasicHashtable::free_entry(entry); |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2115 } |
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2116 |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2117 // Find a entry with the same fingerprint if it exists |
1207
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2118 AdapterHandlerEntry* lookup(int total_args_passed, BasicType* sig_bt) { |
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
kvn
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1257
diff
changeset
|
2119 NOT_PRODUCT(_lookups++); |
1207
74c848d437ab
6921922: fix for 6911204 breaks tagged stack interpreter
never
parents:
1205
diff
changeset
|
2120 AdapterFingerPrint fp(total_args_passed, sig_bt); |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2121 unsigned int hash = fp.compute_hash(); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2122 int index = hash_to_index(hash); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2123 for (AdapterHandlerEntry* e = bucket(index); e != NULL; e = e->next()) { |
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
kvn
parents:
1257
diff
changeset
|
2124 NOT_PRODUCT(_buckets++); |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2125 if (e->hash() == hash) { |
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
kvn
parents:
1257
diff
changeset
|
2126 NOT_PRODUCT(_equals++); |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2127 if (fp.equals(e->fingerprint())) { |
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
kvn
parents:
1257
diff
changeset
|
2128 #ifndef PRODUCT |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2129 if (fp.is_compact()) _compact++; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2130 _hits++; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2131 #endif |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2132 return e; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2133 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2134 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2135 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2136 return NULL; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2137 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2138 |
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
kvn
parents:
1257
diff
changeset
|
2139 #ifndef PRODUCT |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2140 void print_statistics() { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2141 ResourceMark rm; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2142 int longest = 0; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2143 int empty = 0; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2144 int total = 0; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2145 int nonempty = 0; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2146 for (int index = 0; index < table_size(); index++) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2147 int count = 0; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2148 for (AdapterHandlerEntry* e = bucket(index); e != NULL; e = e->next()) { |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2149 count++; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2150 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2151 if (count != 0) nonempty++; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2152 if (count == 0) empty++; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2153 if (count > longest) longest = count; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2154 total += count; |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2155 } |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2156 tty->print_cr("AdapterHandlerTable: empty %d longest %d total %d average %f", |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2157 empty, longest, total, total / (double)nonempty); |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2158 tty->print_cr("AdapterHandlerTable: lookups %d buckets %d equals %d hits %d compact %d", |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2159 _lookups, _buckets, _equals, _hits, _compact); |
1263
e7b1cc79bd25
6926697: "optimized" VM build failed: The type "AdapterHandlerTableIterator" is incomplete
kvn
parents:
1257
diff
changeset
|
2160 } |
1187
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2161 #endif |
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
never
parents:
1142
diff
changeset
|
2162 }; |
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2163 |
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2164 |
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2165 #ifndef PRODUCT |
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2166 |
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2167 int AdapterHandlerTable::_lookups; |
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2168 int AdapterHandlerTable::_buckets; |
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2169 int AdapterHandlerTable::_equals; |
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2170 int AdapterHandlerTable::_hits; |
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2171 int AdapterHandlerTable::_compact; |
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2172 |
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2173 #endif |
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2174 |
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2175 class AdapterHandlerTableIterator : public StackObj { |
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2176 private: |
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2177 AdapterHandlerTable* _table; |
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2178 int _index; |
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2179 AdapterHandlerEntry* _current; |
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2180 |
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2181 void scan() { |
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2182 while (_index < _table->table_size()) { |
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2183 AdapterHandlerEntry* a = _table->bucket(_index); |
1564 | 2184 _index++; |
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2185 if (a != NULL) { |
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2186 _current = a; |
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2187 return; |
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2188 } |
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2189 } |
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2190 } |
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2191 |
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2192 public: |
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2193 AdapterHandlerTableIterator(AdapterHandlerTable* table): _table(table), _index(0), _current(NULL) { |
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2194 scan(); |
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2195 } |
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2196 bool has_next() { |
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2197 return _current != NULL; |
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2198 } |
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2199 AdapterHandlerEntry* next() { |
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2200 if (_current != NULL) { |
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2201 AdapterHandlerEntry* result = _current; |
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2202 _current = _current->next(); |
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2203 if (_current == NULL) scan(); |
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2204 return result; |
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2205 } else { |
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2206 return NULL; |
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2207 } |
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2208 } |
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2209 }; |
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2210 |
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2211 |
0 | 2212 // --------------------------------------------------------------------------- |
2213 // Implementation of AdapterHandlerLibrary | |
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2214 AdapterHandlerTable* AdapterHandlerLibrary::_adapters = NULL; |
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2215 AdapterHandlerEntry* AdapterHandlerLibrary::_abstract_method_handler = NULL; |
0 | 2216 const int AdapterHandlerLibrary_size = 16*K; |
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2217 BufferBlob* AdapterHandlerLibrary::_buffer = NULL; |
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2218 |
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2219 BufferBlob* AdapterHandlerLibrary::buffer_blob() { |
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2220 // Should be called only when AdapterHandlerLibrary_lock is active. |
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2221 if (_buffer == NULL) // Initialize lazily |
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2222 _buffer = BufferBlob::create("adapters", AdapterHandlerLibrary_size); |
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2223 return _buffer; |
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2224 } |
0 | 2225 |
2226 void AdapterHandlerLibrary::initialize() { | |
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2227 if (_adapters != NULL) return; |
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2228 _adapters = new AdapterHandlerTable(); |
0 | 2229 |
2230 // Create a special handler for abstract methods. Abstract methods | |
2231 // are never compiled so an i2c entry is somewhat meaningless, but | |
2232 // fill it in with something appropriate just in case. Pass handle | |
2233 // wrong method for the c2i transitions. | |
2234 address wrong_method = SharedRuntime::get_handle_wrong_method_stub(); | |
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2235 _abstract_method_handler = AdapterHandlerLibrary::new_entry(new AdapterFingerPrint(0, NULL), |
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2236 StubRoutines::throw_AbstractMethodError_entry(), |
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2237 wrong_method, wrong_method); |
0 | 2238 } |
2239 | |
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2240 AdapterHandlerEntry* AdapterHandlerLibrary::new_entry(AdapterFingerPrint* fingerprint, |
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2241 address i2c_entry, |
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2242 address c2i_entry, |
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2243 address c2i_unverified_entry) { |
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2244 return _adapters->new_entry(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry); |
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2245 } |
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2246 |
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2247 AdapterHandlerEntry* AdapterHandlerLibrary::get_adapter(methodHandle method) { |
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2248 // Use customized signature handler. Need to lock around updates to |
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2249 // the AdapterHandlerTable (it is not safe for concurrent readers |
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2250 // and a single writer: this could be fixed if it becomes a |
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2251 // problem). |
0 | 2252 |
2253 // Get the address of the ic_miss handlers before we grab the | |
2254 // AdapterHandlerLibrary_lock. This fixes bug 6236259 which | |
2255 // was caused by the initialization of the stubs happening | |
2256 // while we held the lock and then notifying jvmti while | |
2257 // holding it. This just forces the initialization to be a little | |
2258 // earlier. | |
2259 address ic_miss = SharedRuntime::get_ic_miss_stub(); | |
2260 assert(ic_miss != NULL, "must have handler"); | |
2261 | |
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2262 ResourceMark rm; |
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2263 |
1748 | 2264 NOT_PRODUCT(int insts_size); |
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2265 AdapterBlob* B = NULL; |
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2266 AdapterHandlerEntry* entry = NULL; |
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2267 AdapterFingerPrint* fingerprint = NULL; |
0 | 2268 { |
2269 MutexLocker mu(AdapterHandlerLibrary_lock); | |
2270 // make sure data structure is initialized | |
2271 initialize(); | |
2272 | |
2273 if (method->is_abstract()) { | |
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2274 return _abstract_method_handler; |
0 | 2275 } |
2276 | |
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2277 // Fill in the signature array, for the calling-convention call. |
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2278 int total_args_passed = method->size_of_parameters(); // All args on stack |
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2279 |
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2280 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_args_passed); |
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2281 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed); |
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2282 int i = 0; |
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2283 if (!method->is_static()) // Pass in receiver first |
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2284 sig_bt[i++] = T_OBJECT; |
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2285 for (SignatureStream ss(method->signature()); !ss.at_return_type(); ss.next()) { |
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2286 sig_bt[i++] = ss.type(); // Collect remaining bits of signature |
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2287 if (ss.type() == T_LONG || ss.type() == T_DOUBLE) |
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2288 sig_bt[i++] = T_VOID; // Longs & doubles take 2 Java slots |
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2289 } |
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2290 assert(i == total_args_passed, ""); |
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2291 |
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2292 // Lookup method signature's fingerprint |
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2293 entry = _adapters->lookup(total_args_passed, sig_bt); |
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2294 |
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2295 #ifdef ASSERT |
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2296 AdapterHandlerEntry* shared_entry = NULL; |
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2297 if (VerifyAdapterSharing && entry != NULL) { |
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2298 shared_entry = entry; |
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2299 entry = NULL; |
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2300 } |
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2301 #endif |
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2302 |
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2303 if (entry != NULL) { |
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2304 return entry; |
0 | 2305 } |
2306 | |
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2307 // Get a description of the compiled java calling convention and the largest used (VMReg) stack slot usage |
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2308 int comp_args_on_stack = SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed, false); |
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2309 |
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2310 // Make a C heap allocated version of the fingerprint to store in the adapter |
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2311 fingerprint = new AdapterFingerPrint(total_args_passed, sig_bt); |
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2312 |
0 | 2313 // Create I2C & C2I handlers |
2314 | |
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2315 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache |
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2316 if (buf != NULL) { |
1748 | 2317 CodeBuffer buffer(buf); |
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2318 short buffer_locs[20]; |
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2319 buffer.insts()->initialize_shared_locs((relocInfo*)buffer_locs, |
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2320 sizeof(buffer_locs)/sizeof(relocInfo)); |
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2321 MacroAssembler _masm(&buffer); |
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2322 |
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2323 entry = SharedRuntime::generate_i2c2i_adapters(&_masm, |
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2324 total_args_passed, |
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2325 comp_args_on_stack, |
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2326 sig_bt, |
1187
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2327 regs, |
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2328 fingerprint); |
0 | 2329 |
1207
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2330 #ifdef ASSERT |
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2331 if (VerifyAdapterSharing) { |
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2332 if (shared_entry != NULL) { |
1748 | 2333 assert(shared_entry->compare_code(buf->code_begin(), buffer.insts_size(), total_args_passed, sig_bt), |
1207
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2334 "code must match"); |
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2335 // Release the one just created and return the original |
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2336 _adapters->free_entry(entry); |
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2337 return shared_entry; |
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2338 } else { |
1748 | 2339 entry->save_code(buf->code_begin(), buffer.insts_size(), total_args_passed, sig_bt); |
1207
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2340 } |
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2341 } |
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2342 #endif |
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2343 |
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2344 B = AdapterBlob::create(&buffer); |
1748 | 2345 NOT_PRODUCT(insts_size = buffer.insts_size()); |
742
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2346 } |
28 | 2347 if (B == NULL) { |
2348 // CodeCache is full, disable compilation | |
2349 // Ought to log this but compile log is only per compile thread | |
2350 // and we're some non descript Java thread. | |
1202 | 2351 MutexUnlocker mu(AdapterHandlerLibrary_lock); |
2352 CompileBroker::handle_full_code_cache(); | |
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2353 return NULL; // Out of CodeCache space |
28 | 2354 } |
1748 | 2355 entry->relocate(B->content_begin()); |
0 | 2356 #ifndef PRODUCT |
2357 // debugging suppport | |
2358 if (PrintAdapterHandlers) { | |
2359 tty->cr(); | |
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2360 tty->print_cr("i2c argument handler #%d for: %s %s (fingerprint = %s, %d bytes generated)", |
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2361 _adapters->number_of_entries(), (method->is_static() ? "static" : "receiver"), |
1748 | 2362 method->signature()->as_C_string(), fingerprint->as_string(), insts_size ); |
0 | 2363 tty->print_cr("c2i argument handler starts at %p",entry->get_c2i_entry()); |
1748 | 2364 Disassembler::decode(entry->get_i2c_entry(), entry->get_i2c_entry() + insts_size); |
0 | 2365 } |
2366 #endif | |
2367 | |
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2368 _adapters->add(entry); |
0 | 2369 } |
2370 // Outside of the lock | |
2371 if (B != NULL) { | |
2372 char blob_id[256]; | |
2373 jio_snprintf(blob_id, | |
2374 sizeof(blob_id), | |
1187
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2375 "%s(%s)@" PTR_FORMAT, |
1299
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2376 B->name(), |
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2377 fingerprint->as_string(), |
1748 | 2378 B->content_begin()); |
2379 Forte::register_stub(blob_id, B->content_begin(), B->content_end()); | |
0 | 2380 |
2381 if (JvmtiExport::should_post_dynamic_code_generated()) { | |
1748 | 2382 JvmtiExport::post_dynamic_code_generated(blob_id, B->content_begin(), B->content_end()); |
0 | 2383 } |
2384 } | |
1187
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2385 return entry; |
0 | 2386 } |
2387 | |
2388 void AdapterHandlerEntry::relocate(address new_base) { | |
2389 ptrdiff_t delta = new_base - _i2c_entry; | |
2390 _i2c_entry += delta; | |
2391 _c2i_entry += delta; | |
2392 _c2i_unverified_entry += delta; | |
2393 } | |
2394 | |
1207
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2395 |
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2396 void AdapterHandlerEntry::deallocate() { |
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2397 delete _fingerprint; |
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2398 #ifdef ASSERT |
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2399 if (_saved_code) FREE_C_HEAP_ARRAY(unsigned char, _saved_code); |
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2400 if (_saved_sig) FREE_C_HEAP_ARRAY(Basictype, _saved_sig); |
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2401 #endif |
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2402 } |
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2403 |
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2404 |
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2405 #ifdef ASSERT |
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2406 // Capture the code before relocation so that it can be compared |
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2407 // against other versions. If the code is captured after relocation |
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2408 // then relative instructions won't be equivalent. |
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2409 void AdapterHandlerEntry::save_code(unsigned char* buffer, int length, int total_args_passed, BasicType* sig_bt) { |
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2410 _saved_code = NEW_C_HEAP_ARRAY(unsigned char, length); |
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2411 _code_length = length; |
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2412 memcpy(_saved_code, buffer, length); |
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2413 _total_args_passed = total_args_passed; |
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2414 _saved_sig = NEW_C_HEAP_ARRAY(BasicType, _total_args_passed); |
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2415 memcpy(_saved_sig, sig_bt, _total_args_passed * sizeof(BasicType)); |
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2416 } |
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2417 |
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2418 |
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2419 bool AdapterHandlerEntry::compare_code(unsigned char* buffer, int length, int total_args_passed, BasicType* sig_bt) { |
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2420 if (length != _code_length) { |
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2421 return false; |
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|
2422 } |
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2423 for (int i = 0; i < length; i++) { |
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2424 if (buffer[i] != _saved_code[i]) { |
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2425 return false; |
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|
2426 } |
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|
2427 } |
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2428 return true; |
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|
2429 } |
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|
2430 #endif |
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2431 |
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2432 |
0 | 2433 // Create a native wrapper for this native method. The wrapper converts the |
2434 // java compiled calling convention to the native convention, handlizes | |
2435 // arguments, and transitions to native. On return from the native we transition | |
2436 // back to java blocking if a safepoint is in progress. | |
2437 nmethod *AdapterHandlerLibrary::create_native_wrapper(methodHandle method) { | |
2438 ResourceMark rm; | |
2439 nmethod* nm = NULL; | |
2440 | |
2441 if (PrintCompilation) { | |
2442 ttyLocker ttyl; | |
2443 tty->print("--- n%s ", (method->is_synchronized() ? "s" : " ")); | |
2444 method->print_short_name(tty); | |
2445 if (method->is_static()) { | |
2446 tty->print(" (static)"); | |
2447 } | |
2448 tty->cr(); | |
2449 } | |
2450 | |
2451 assert(method->has_native_function(), "must have something valid to call!"); | |
2452 | |
2453 { | |
2454 // perform the work while holding the lock, but perform any printing outside the lock | |
2455 MutexLocker mu(AdapterHandlerLibrary_lock); | |
2456 // See if somebody beat us to it | |
2457 nm = method->code(); | |
2458 if (nm) { | |
2459 return nm; | |
2460 } | |
2461 | |
742
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2462 ResourceMark rm; |
0 | 2463 |
742
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2464 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache |
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2465 if (buf != NULL) { |
1748 | 2466 CodeBuffer buffer(buf); |
742
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2467 double locs_buf[20]; |
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2468 buffer.insts()->initialize_shared_locs((relocInfo*)locs_buf, sizeof(locs_buf) / sizeof(relocInfo)); |
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2469 MacroAssembler _masm(&buffer); |
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2470 |
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2471 // Fill in the signature array, for the calling-convention call. |
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2472 int total_args_passed = method->size_of_parameters(); |
0 | 2473 |
742
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2474 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType,total_args_passed); |
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2475 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair,total_args_passed); |
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2476 int i=0; |
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2477 if( !method->is_static() ) // Pass in receiver first |
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2478 sig_bt[i++] = T_OBJECT; |
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2479 SignatureStream ss(method->signature()); |
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2480 for( ; !ss.at_return_type(); ss.next()) { |
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2481 sig_bt[i++] = ss.type(); // Collect remaining bits of signature |
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2482 if( ss.type() == T_LONG || ss.type() == T_DOUBLE ) |
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2483 sig_bt[i++] = T_VOID; // Longs & doubles take 2 Java slots |
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2484 } |
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2485 assert( i==total_args_passed, "" ); |
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2486 BasicType ret_type = ss.type(); |
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2487 |
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2488 // Now get the compiled-Java layout as input arguments |
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2489 int comp_args_on_stack; |
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2490 comp_args_on_stack = SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed, false); |
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2491 |
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2492 // Generate the compiled-to-native wrapper code |
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2493 nm = SharedRuntime::generate_native_wrapper(&_masm, |
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2494 method, |
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|
2495 total_args_passed, |
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|
2496 comp_args_on_stack, |
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|
2497 sig_bt,regs, |
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2498 ret_type); |
0 | 2499 } |
2500 } | |
2501 | |
2502 // Must unlock before calling set_code | |
1728
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|
2503 |
0 | 2504 // Install the generated code. |
2505 if (nm != NULL) { | |
2506 method->set_code(method, nm); | |
2507 nm->post_compiled_method_load_event(); | |
2508 } else { | |
2509 // CodeCache is full, disable compilation | |
1202 | 2510 CompileBroker::handle_full_code_cache(); |
0 | 2511 } |
2512 return nm; | |
2513 } | |
2514 | |
116
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2515 #ifdef HAVE_DTRACE_H |
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2516 // Create a dtrace nmethod for this method. The wrapper converts the |
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2517 // java compiled calling convention to the native convention, makes a dummy call |
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2518 // (actually nops for the size of the call instruction, which become a trap if |
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2519 // probe is enabled). The returns to the caller. Since this all looks like a |
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2520 // leaf no thread transition is needed. |
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2521 |
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|
2522 nmethod *AdapterHandlerLibrary::create_dtrace_nmethod(methodHandle method) { |
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2523 ResourceMark rm; |
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2524 nmethod* nm = NULL; |
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2525 |
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2526 if (PrintCompilation) { |
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2527 ttyLocker ttyl; |
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2528 tty->print("--- n%s "); |
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2529 method->print_short_name(tty); |
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2530 if (method->is_static()) { |
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2531 tty->print(" (static)"); |
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2532 } |
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2533 tty->cr(); |
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|
2534 } |
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2535 |
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2536 { |
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2537 // perform the work while holding the lock, but perform any printing |
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2538 // outside the lock |
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2539 MutexLocker mu(AdapterHandlerLibrary_lock); |
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2540 // See if somebody beat us to it |
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2541 nm = method->code(); |
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2542 if (nm) { |
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2543 return nm; |
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2544 } |
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2545 |
742
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2546 ResourceMark rm; |
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2547 |
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2548 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache |
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2549 if (buf != NULL) { |
1748 | 2550 CodeBuffer buffer(buf); |
742
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2551 // Need a few relocation entries |
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2552 double locs_buf[20]; |
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2553 buffer.insts()->initialize_shared_locs( |
116
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2554 (relocInfo*)locs_buf, sizeof(locs_buf) / sizeof(relocInfo)); |
742
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2555 MacroAssembler _masm(&buffer); |
116
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2556 |
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2557 // Generate the compiled-to-native wrapper code |
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2558 nm = SharedRuntime::generate_dtrace_nmethod(&_masm, method); |
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2559 } |
116
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2560 } |
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2561 return nm; |
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|
2562 } |
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|
2563 |
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2564 // the dtrace method needs to convert java lang string to utf8 string. |
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2565 void SharedRuntime::get_utf(oopDesc* src, address dst) { |
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2566 typeArrayOop jlsValue = java_lang_String::value(src); |
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2567 int jlsOffset = java_lang_String::offset(src); |
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2568 int jlsLen = java_lang_String::length(src); |
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2569 jchar* jlsPos = (jlsLen == 0) ? NULL : |
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2570 jlsValue->char_at_addr(jlsOffset); |
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2571 (void) UNICODE::as_utf8(jlsPos, jlsLen, (char *)dst, max_dtrace_string_size); |
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2572 } |
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2573 #endif // ndef HAVE_DTRACE_H |
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2574 |
0 | 2575 // ------------------------------------------------------------------------- |
2576 // Java-Java calling convention | |
2577 // (what you use when Java calls Java) | |
2578 | |
2579 //------------------------------name_for_receiver---------------------------------- | |
2580 // For a given signature, return the VMReg for parameter 0. | |
2581 VMReg SharedRuntime::name_for_receiver() { | |
2582 VMRegPair regs; | |
2583 BasicType sig_bt = T_OBJECT; | |
2584 (void) java_calling_convention(&sig_bt, ®s, 1, true); | |
2585 // Return argument 0 register. In the LP64 build pointers | |
2586 // take 2 registers, but the VM wants only the 'main' name. | |
2587 return regs.first(); | |
2588 } | |
2589 | |
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2590 VMRegPair *SharedRuntime::find_callee_arguments(symbolOop sig, bool has_receiver, int* arg_size) { |
0 | 2591 // This method is returning a data structure allocating as a |
2592 // ResourceObject, so do not put any ResourceMarks in here. | |
2593 char *s = sig->as_C_string(); | |
2594 int len = (int)strlen(s); | |
2595 *s++; len--; // Skip opening paren | |
2596 char *t = s+len; | |
2597 while( *(--t) != ')' ) ; // Find close paren | |
2598 | |
2599 BasicType *sig_bt = NEW_RESOURCE_ARRAY( BasicType, 256 ); | |
2600 VMRegPair *regs = NEW_RESOURCE_ARRAY( VMRegPair, 256 ); | |
2601 int cnt = 0; | |
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2602 if (has_receiver) { |
0 | 2603 sig_bt[cnt++] = T_OBJECT; // Receiver is argument 0; not in signature |
2604 } | |
2605 | |
2606 while( s < t ) { | |
2607 switch( *s++ ) { // Switch on signature character | |
2608 case 'B': sig_bt[cnt++] = T_BYTE; break; | |
2609 case 'C': sig_bt[cnt++] = T_CHAR; break; | |
2610 case 'D': sig_bt[cnt++] = T_DOUBLE; sig_bt[cnt++] = T_VOID; break; | |
2611 case 'F': sig_bt[cnt++] = T_FLOAT; break; | |
2612 case 'I': sig_bt[cnt++] = T_INT; break; | |
2613 case 'J': sig_bt[cnt++] = T_LONG; sig_bt[cnt++] = T_VOID; break; | |
2614 case 'S': sig_bt[cnt++] = T_SHORT; break; | |
2615 case 'Z': sig_bt[cnt++] = T_BOOLEAN; break; | |
2616 case 'V': sig_bt[cnt++] = T_VOID; break; | |
2617 case 'L': // Oop | |
2618 while( *s++ != ';' ) ; // Skip signature | |
2619 sig_bt[cnt++] = T_OBJECT; | |
2620 break; | |
2621 case '[': { // Array | |
2622 do { // Skip optional size | |
2623 while( *s >= '0' && *s <= '9' ) s++; | |
2624 } while( *s++ == '[' ); // Nested arrays? | |
2625 // Skip element type | |
2626 if( s[-1] == 'L' ) | |
2627 while( *s++ != ';' ) ; // Skip signature | |
2628 sig_bt[cnt++] = T_ARRAY; | |
2629 break; | |
2630 } | |
2631 default : ShouldNotReachHere(); | |
2632 } | |
2633 } | |
2634 assert( cnt < 256, "grow table size" ); | |
2635 | |
2636 int comp_args_on_stack; | |
2637 comp_args_on_stack = java_calling_convention(sig_bt, regs, cnt, true); | |
2638 | |
2639 // the calling convention doesn't count out_preserve_stack_slots so | |
2640 // we must add that in to get "true" stack offsets. | |
2641 | |
2642 if (comp_args_on_stack) { | |
2643 for (int i = 0; i < cnt; i++) { | |
2644 VMReg reg1 = regs[i].first(); | |
2645 if( reg1->is_stack()) { | |
2646 // Yuck | |
2647 reg1 = reg1->bias(out_preserve_stack_slots()); | |
2648 } | |
2649 VMReg reg2 = regs[i].second(); | |
2650 if( reg2->is_stack()) { | |
2651 // Yuck | |
2652 reg2 = reg2->bias(out_preserve_stack_slots()); | |
2653 } | |
2654 regs[i].set_pair(reg2, reg1); | |
2655 } | |
2656 } | |
2657 | |
2658 // results | |
2659 *arg_size = cnt; | |
2660 return regs; | |
2661 } | |
2662 | |
2663 // OSR Migration Code | |
2664 // | |
2665 // This code is used convert interpreter frames into compiled frames. It is | |
2666 // called from very start of a compiled OSR nmethod. A temp array is | |
2667 // allocated to hold the interesting bits of the interpreter frame. All | |
2668 // active locks are inflated to allow them to move. The displaced headers and | |
2669 // active interpeter locals are copied into the temp buffer. Then we return | |
2670 // back to the compiled code. The compiled code then pops the current | |
2671 // interpreter frame off the stack and pushes a new compiled frame. Then it | |
2672 // copies the interpreter locals and displaced headers where it wants. | |
2673 // Finally it calls back to free the temp buffer. | |
2674 // | |
2675 // All of this is done NOT at any Safepoint, nor is any safepoint or GC allowed. | |
2676 | |
2677 JRT_LEAF(intptr_t*, SharedRuntime::OSR_migration_begin( JavaThread *thread) ) | |
2678 | |
2679 #ifdef IA64 | |
2680 ShouldNotReachHere(); // NYI | |
2681 #endif /* IA64 */ | |
2682 | |
2683 // | |
2684 // This code is dependent on the memory layout of the interpreter local | |
2685 // array and the monitors. On all of our platforms the layout is identical | |
2686 // so this code is shared. If some platform lays the their arrays out | |
2687 // differently then this code could move to platform specific code or | |
2688 // the code here could be modified to copy items one at a time using | |
2689 // frame accessor methods and be platform independent. | |
2690 | |
2691 frame fr = thread->last_frame(); | |
2692 assert( fr.is_interpreted_frame(), "" ); | |
2693 assert( fr.interpreter_frame_expression_stack_size()==0, "only handle empty stacks" ); | |
2694 | |
2695 // Figure out how many monitors are active. | |
2696 int active_monitor_count = 0; | |
2697 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); | |
2698 kptr < fr.interpreter_frame_monitor_begin(); | |
2699 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { | |
2700 if( kptr->obj() != NULL ) active_monitor_count++; | |
2701 } | |
2702 | |
2703 // QQQ we could place number of active monitors in the array so that compiled code | |
2704 // could double check it. | |
2705 | |
2706 methodOop moop = fr.interpreter_frame_method(); | |
2707 int max_locals = moop->max_locals(); | |
2708 // Allocate temp buffer, 1 word per local & 2 per active monitor | |
2709 int buf_size_words = max_locals + active_monitor_count*2; | |
2710 intptr_t *buf = NEW_C_HEAP_ARRAY(intptr_t,buf_size_words); | |
2711 | |
2712 // Copy the locals. Order is preserved so that loading of longs works. | |
2713 // Since there's no GC I can copy the oops blindly. | |
2714 assert( sizeof(HeapWord)==sizeof(intptr_t), "fix this code"); | |
1506 | 2715 Copy::disjoint_words((HeapWord*)fr.interpreter_frame_local_at(max_locals-1), |
0 | 2716 (HeapWord*)&buf[0], |
2717 max_locals); | |
2718 | |
2719 // Inflate locks. Copy the displaced headers. Be careful, there can be holes. | |
2720 int i = max_locals; | |
2721 for( BasicObjectLock *kptr2 = fr.interpreter_frame_monitor_end(); | |
2722 kptr2 < fr.interpreter_frame_monitor_begin(); | |
2723 kptr2 = fr.next_monitor_in_interpreter_frame(kptr2) ) { | |
2724 if( kptr2->obj() != NULL) { // Avoid 'holes' in the monitor array | |
2725 BasicLock *lock = kptr2->lock(); | |
2726 // Inflate so the displaced header becomes position-independent | |
2727 if (lock->displaced_header()->is_unlocked()) | |
2728 ObjectSynchronizer::inflate_helper(kptr2->obj()); | |
2729 // Now the displaced header is free to move | |
2730 buf[i++] = (intptr_t)lock->displaced_header(); | |
2731 buf[i++] = (intptr_t)kptr2->obj(); | |
2732 } | |
2733 } | |
2734 assert( i - max_locals == active_monitor_count*2, "found the expected number of monitors" ); | |
2735 | |
2736 return buf; | |
2737 JRT_END | |
2738 | |
2739 JRT_LEAF(void, SharedRuntime::OSR_migration_end( intptr_t* buf) ) | |
2740 FREE_C_HEAP_ARRAY(intptr_t,buf); | |
2741 JRT_END | |
2742 | |
2743 bool AdapterHandlerLibrary::contains(CodeBlob* b) { | |
1187
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2744 AdapterHandlerTableIterator iter(_adapters); |
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2745 while (iter.has_next()) { |
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|
2746 AdapterHandlerEntry* a = iter.next(); |
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|
2747 if ( b == CodeCache::find_blob(a->get_i2c_entry()) ) return true; |
0 | 2748 } |
2749 return false; | |
2750 } | |
2751 | |
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|
2752 void AdapterHandlerLibrary::print_handler_on(outputStream* st, CodeBlob* b) { |
1187
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|
2753 AdapterHandlerTableIterator iter(_adapters); |
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2754 while (iter.has_next()) { |
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2755 AdapterHandlerEntry* a = iter.next(); |
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2756 if ( b == CodeCache::find_blob(a->get_i2c_entry()) ) { |
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2757 st->print("Adapter for signature: "); |
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|
2758 st->print_cr("%s i2c: " INTPTR_FORMAT " c2i: " INTPTR_FORMAT " c2iUV: " INTPTR_FORMAT, |
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|
2759 a->fingerprint()->as_string(), |
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2760 a->get_i2c_entry(), a->get_c2i_entry(), a->get_c2i_unverified_entry()); |
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2761 |
0 | 2762 return; |
2763 } | |
2764 } | |
2765 assert(false, "Should have found handler"); | |
2766 } | |
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2767 |
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|
2768 #ifndef PRODUCT |
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|
2769 |
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2770 void AdapterHandlerLibrary::print_statistics() { |
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2771 _adapters->print_statistics(); |
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|
2772 } |
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2773 |
0 | 2774 #endif /* PRODUCT */ |