Mercurial > hg > graal-compiler
annotate src/share/vm/runtime/sharedRuntime.cpp @ 1748:3e8fbc61cee8
6978355: renaming for 6961697
Summary: This is the renaming part of 6961697 to keep the actual changes small for review.
Reviewed-by: kvn, never
| author | twisti |
|---|---|
| date | Wed, 25 Aug 2010 05:27:54 -0700 |
| parents | a62d332029cf |
| children | d257356e35f0 |
| rev | line source |
|---|---|
| 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"); |
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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)) | |
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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)) | |
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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)) | |
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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)) | |
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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 | |
|
610
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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 | |
|
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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 // | |
|
1563
1a5913bf5e19
6951083: oops and relocations should part of nmethod not CodeBlob
twisti
parents:
1507
diff
changeset
|
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) { | |
| 1636 assert(EnableMethodHandles, ""); | |
| 1637 oop singleKlass = wrong_method_type_is_for_single_argument(thread, required); | |
| 1638 if (singleKlass != NULL) { | |
| 1639 const char* objName = "argument or return value"; | |
| 1640 if (actual != NULL) { | |
| 1641 // be flexible about the junk passed in: | |
| 1642 klassOop ak = (actual->is_klass() | |
| 1643 ? (klassOop)actual | |
| 1644 : actual->klass()); | |
| 1645 objName = Klass::cast(ak)->external_name(); | |
| 1646 } | |
| 1647 Klass* targetKlass = Klass::cast(required->is_klass() | |
| 1648 ? (klassOop)required | |
| 1649 : java_lang_Class::as_klassOop(required)); | |
| 1650 return generate_class_cast_message(objName, targetKlass->external_name()); | |
| 1651 } else { | |
| 1652 // %%% need to get the MethodType string, without messing around too much | |
| 1653 // Get a signature from the invoke instruction | |
| 1654 const char* mhName = "method handle"; | |
| 1655 const char* targetType = "the required signature"; | |
| 1656 vframeStream vfst(thread, true); | |
| 1657 if (!vfst.at_end()) { | |
| 1658 Bytecode_invoke* call = Bytecode_invoke_at(vfst.method(), vfst.bci()); | |
| 1659 methodHandle target; | |
| 1660 { | |
| 1661 EXCEPTION_MARK; | |
| 1662 target = call->static_target(THREAD); | |
| 1663 if (HAS_PENDING_EXCEPTION) { CLEAR_PENDING_EXCEPTION; } | |
| 1664 } | |
| 1665 if (target.not_null() | |
| 1666 && target->is_method_handle_invoke() | |
| 1667 && required == target->method_handle_type()) { | |
| 1668 targetType = target->signature()->as_C_string(); | |
| 1669 } | |
| 1670 } | |
| 1671 klassOop kignore; int fignore; | |
| 1672 methodOop actual_method = MethodHandles::decode_method(actual, | |
| 1673 kignore, fignore); | |
| 1674 if (actual_method != NULL) { | |
|
1507
cd5dbf694d45
6939134: JSR 292 adjustments to method handle invocation
jrose
parents:
1506
diff
changeset
|
1675 if (methodOopDesc::is_method_handle_invoke_name(actual_method->name())) |
| 710 | 1676 mhName = "$"; |
| 1677 else | |
| 1678 mhName = actual_method->signature()->as_C_string(); | |
| 1679 if (mhName[0] == '$') | |
| 1680 mhName = actual_method->signature()->as_C_string(); | |
| 1681 } | |
| 1682 return generate_class_cast_message(mhName, targetType, | |
| 1683 " cannot be called as "); | |
| 1684 } | |
| 1685 } | |
| 1686 | |
| 1687 oop SharedRuntime::wrong_method_type_is_for_single_argument(JavaThread* thr, | |
| 1688 oopDesc* required) { | |
| 1689 if (required == NULL) return NULL; | |
| 1142 | 1690 if (required->klass() == SystemDictionary::Class_klass()) |
| 710 | 1691 return required; |
| 1692 if (required->is_klass()) | |
| 1693 return Klass::cast(klassOop(required))->java_mirror(); | |
| 1694 return NULL; | |
| 1695 } | |
| 1696 | |
| 1697 | |
| 0 | 1698 char* SharedRuntime::generate_class_cast_message( |
| 710 | 1699 const char* objName, const char* targetKlassName, const char* desc) { |
| 0 | 1700 size_t msglen = strlen(objName) + strlen(desc) + strlen(targetKlassName) + 1; |
| 1701 | |
| 53 | 1702 char* message = NEW_RESOURCE_ARRAY(char, msglen); |
| 0 | 1703 if (NULL == message) { |
| 53 | 1704 // Shouldn't happen, but don't cause even more problems if it does |
| 0 | 1705 message = const_cast<char*>(objName); |
| 1706 } else { | |
| 1707 jio_snprintf(message, msglen, "%s%s%s", objName, desc, targetKlassName); | |
| 1708 } | |
| 1709 return message; | |
| 1710 } | |
| 1711 | |
| 1712 JRT_LEAF(void, SharedRuntime::reguard_yellow_pages()) | |
| 1713 (void) JavaThread::current()->reguard_stack(); | |
| 1714 JRT_END | |
| 1715 | |
| 1716 | |
| 1717 // Handles the uncommon case in locking, i.e., contention or an inflated lock. | |
| 1718 #ifndef PRODUCT | |
| 1719 int SharedRuntime::_monitor_enter_ctr=0; | |
| 1720 #endif | |
| 1721 JRT_ENTRY_NO_ASYNC(void, SharedRuntime::complete_monitor_locking_C(oopDesc* _obj, BasicLock* lock, JavaThread* thread)) | |
| 1722 oop obj(_obj); | |
| 1723 #ifndef PRODUCT | |
| 1724 _monitor_enter_ctr++; // monitor enter slow | |
| 1725 #endif | |
| 1726 if (PrintBiasedLockingStatistics) { | |
| 1727 Atomic::inc(BiasedLocking::slow_path_entry_count_addr()); | |
| 1728 } | |
| 1729 Handle h_obj(THREAD, obj); | |
| 1730 if (UseBiasedLocking) { | |
| 1731 // Retry fast entry if bias is revoked to avoid unnecessary inflation | |
| 1732 ObjectSynchronizer::fast_enter(h_obj, lock, true, CHECK); | |
| 1733 } else { | |
| 1734 ObjectSynchronizer::slow_enter(h_obj, lock, CHECK); | |
| 1735 } | |
| 1736 assert(!HAS_PENDING_EXCEPTION, "Should have no exception here"); | |
| 1737 JRT_END | |
| 1738 | |
| 1739 #ifndef PRODUCT | |
| 1740 int SharedRuntime::_monitor_exit_ctr=0; | |
| 1741 #endif | |
| 1742 // Handles the uncommon cases of monitor unlocking in compiled code | |
| 1743 JRT_LEAF(void, SharedRuntime::complete_monitor_unlocking_C(oopDesc* _obj, BasicLock* lock)) | |
| 1744 oop obj(_obj); | |
| 1745 #ifndef PRODUCT | |
| 1746 _monitor_exit_ctr++; // monitor exit slow | |
| 1747 #endif | |
| 1748 Thread* THREAD = JavaThread::current(); | |
| 1749 // I'm not convinced we need the code contained by MIGHT_HAVE_PENDING anymore | |
| 1750 // testing was unable to ever fire the assert that guarded it so I have removed it. | |
| 1751 assert(!HAS_PENDING_EXCEPTION, "Do we need code below anymore?"); | |
| 1752 #undef MIGHT_HAVE_PENDING | |
| 1753 #ifdef MIGHT_HAVE_PENDING | |
| 1754 // Save and restore any pending_exception around the exception mark. | |
| 1755 // While the slow_exit must not throw an exception, we could come into | |
| 1756 // this routine with one set. | |
| 1757 oop pending_excep = NULL; | |
| 1758 const char* pending_file; | |
| 1759 int pending_line; | |
| 1760 if (HAS_PENDING_EXCEPTION) { | |
| 1761 pending_excep = PENDING_EXCEPTION; | |
| 1762 pending_file = THREAD->exception_file(); | |
| 1763 pending_line = THREAD->exception_line(); | |
| 1764 CLEAR_PENDING_EXCEPTION; | |
| 1765 } | |
| 1766 #endif /* MIGHT_HAVE_PENDING */ | |
| 1767 | |
| 1768 { | |
| 1769 // Exit must be non-blocking, and therefore no exceptions can be thrown. | |
| 1770 EXCEPTION_MARK; | |
| 1771 ObjectSynchronizer::slow_exit(obj, lock, THREAD); | |
| 1772 } | |
| 1773 | |
| 1774 #ifdef MIGHT_HAVE_PENDING | |
| 1775 if (pending_excep != NULL) { | |
| 1776 THREAD->set_pending_exception(pending_excep, pending_file, pending_line); | |
| 1777 } | |
| 1778 #endif /* MIGHT_HAVE_PENDING */ | |
| 1779 JRT_END | |
| 1780 | |
| 1781 #ifndef PRODUCT | |
| 1782 | |
| 1783 void SharedRuntime::print_statistics() { | |
| 1784 ttyLocker ttyl; | |
| 1785 if (xtty != NULL) xtty->head("statistics type='SharedRuntime'"); | |
| 1786 | |
| 1787 if (_monitor_enter_ctr ) tty->print_cr("%5d monitor enter slow", _monitor_enter_ctr); | |
| 1788 if (_monitor_exit_ctr ) tty->print_cr("%5d monitor exit slow", _monitor_exit_ctr); | |
| 1789 if (_throw_null_ctr) tty->print_cr("%5d implicit null throw", _throw_null_ctr); | |
| 1790 | |
| 1791 SharedRuntime::print_ic_miss_histogram(); | |
| 1792 | |
| 1793 if (CountRemovableExceptions) { | |
| 1794 if (_nof_removable_exceptions > 0) { | |
| 1795 Unimplemented(); // this counter is not yet incremented | |
| 1796 tty->print_cr("Removable exceptions: %d", _nof_removable_exceptions); | |
| 1797 } | |
| 1798 } | |
| 1799 | |
| 1800 // Dump the JRT_ENTRY counters | |
| 1801 if( _new_instance_ctr ) tty->print_cr("%5d new instance requires GC", _new_instance_ctr); | |
| 1802 if( _new_array_ctr ) tty->print_cr("%5d new array requires GC", _new_array_ctr); | |
| 1803 if( _multi1_ctr ) tty->print_cr("%5d multianewarray 1 dim", _multi1_ctr); | |
| 1804 if( _multi2_ctr ) tty->print_cr("%5d multianewarray 2 dim", _multi2_ctr); | |
| 1805 if( _multi3_ctr ) tty->print_cr("%5d multianewarray 3 dim", _multi3_ctr); | |
| 1806 if( _multi4_ctr ) tty->print_cr("%5d multianewarray 4 dim", _multi4_ctr); | |
| 1807 if( _multi5_ctr ) tty->print_cr("%5d multianewarray 5 dim", _multi5_ctr); | |
| 1808 | |
| 1809 tty->print_cr("%5d inline cache miss in compiled", _ic_miss_ctr ); | |
| 1810 tty->print_cr("%5d wrong method", _wrong_method_ctr ); | |
| 1811 tty->print_cr("%5d unresolved static call site", _resolve_static_ctr ); | |
| 1812 tty->print_cr("%5d unresolved virtual call site", _resolve_virtual_ctr ); | |
| 1813 tty->print_cr("%5d unresolved opt virtual call site", _resolve_opt_virtual_ctr ); | |
| 1814 | |
| 1815 if( _mon_enter_stub_ctr ) tty->print_cr("%5d monitor enter stub", _mon_enter_stub_ctr ); | |
| 1816 if( _mon_exit_stub_ctr ) tty->print_cr("%5d monitor exit stub", _mon_exit_stub_ctr ); | |
| 1817 if( _mon_enter_ctr ) tty->print_cr("%5d monitor enter slow", _mon_enter_ctr ); | |
| 1818 if( _mon_exit_ctr ) tty->print_cr("%5d monitor exit slow", _mon_exit_ctr ); | |
| 1819 if( _partial_subtype_ctr) tty->print_cr("%5d slow partial subtype", _partial_subtype_ctr ); | |
| 1820 if( _jbyte_array_copy_ctr ) tty->print_cr("%5d byte array copies", _jbyte_array_copy_ctr ); | |
| 1821 if( _jshort_array_copy_ctr ) tty->print_cr("%5d short array copies", _jshort_array_copy_ctr ); | |
| 1822 if( _jint_array_copy_ctr ) tty->print_cr("%5d int array copies", _jint_array_copy_ctr ); | |
| 1823 if( _jlong_array_copy_ctr ) tty->print_cr("%5d long array copies", _jlong_array_copy_ctr ); | |
| 1824 if( _oop_array_copy_ctr ) tty->print_cr("%5d oop array copies", _oop_array_copy_ctr ); | |
| 1825 if( _checkcast_array_copy_ctr ) tty->print_cr("%5d checkcast array copies", _checkcast_array_copy_ctr ); | |
| 1826 if( _unsafe_array_copy_ctr ) tty->print_cr("%5d unsafe array copies", _unsafe_array_copy_ctr ); | |
| 1827 if( _generic_array_copy_ctr ) tty->print_cr("%5d generic array copies", _generic_array_copy_ctr ); | |
| 1828 if( _slow_array_copy_ctr ) tty->print_cr("%5d slow array copies", _slow_array_copy_ctr ); | |
| 1829 if( _find_handler_ctr ) tty->print_cr("%5d find exception handler", _find_handler_ctr ); | |
| 1830 if( _rethrow_ctr ) tty->print_cr("%5d rethrow handler", _rethrow_ctr ); | |
| 1831 | |
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1832 AdapterHandlerLibrary::print_statistics(); |
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1833 |
| 0 | 1834 if (xtty != NULL) xtty->tail("statistics"); |
| 1835 } | |
| 1836 | |
| 1837 inline double percent(int x, int y) { | |
| 1838 return 100.0 * x / MAX2(y, 1); | |
| 1839 } | |
| 1840 | |
| 1841 class MethodArityHistogram { | |
| 1842 public: | |
| 1843 enum { MAX_ARITY = 256 }; | |
| 1844 private: | |
| 1845 static int _arity_histogram[MAX_ARITY]; // histogram of #args | |
| 1846 static int _size_histogram[MAX_ARITY]; // histogram of arg size in words | |
| 1847 static int _max_arity; // max. arity seen | |
| 1848 static int _max_size; // max. arg size seen | |
| 1849 | |
| 1850 static void add_method_to_histogram(nmethod* nm) { | |
| 1851 methodOop m = nm->method(); | |
| 1852 ArgumentCount args(m->signature()); | |
| 1853 int arity = args.size() + (m->is_static() ? 0 : 1); | |
| 1854 int argsize = m->size_of_parameters(); | |
| 1855 arity = MIN2(arity, MAX_ARITY-1); | |
| 1856 argsize = MIN2(argsize, MAX_ARITY-1); | |
| 1857 int count = nm->method()->compiled_invocation_count(); | |
| 1858 _arity_histogram[arity] += count; | |
| 1859 _size_histogram[argsize] += count; | |
| 1860 _max_arity = MAX2(_max_arity, arity); | |
| 1861 _max_size = MAX2(_max_size, argsize); | |
| 1862 } | |
| 1863 | |
| 1864 void print_histogram_helper(int n, int* histo, const char* name) { | |
| 1865 const int N = MIN2(5, n); | |
| 1866 tty->print_cr("\nHistogram of call arity (incl. rcvr, calls to compiled methods only):"); | |
| 1867 double sum = 0; | |
| 1868 double weighted_sum = 0; | |
| 1869 int i; | |
| 1870 for (i = 0; i <= n; i++) { sum += histo[i]; weighted_sum += i*histo[i]; } | |
| 1871 double rest = sum; | |
| 1872 double percent = sum / 100; | |
| 1873 for (i = 0; i <= N; i++) { | |
| 1874 rest -= histo[i]; | |
| 1875 tty->print_cr("%4d: %7d (%5.1f%%)", i, histo[i], histo[i] / percent); | |
| 1876 } | |
| 1877 tty->print_cr("rest: %7d (%5.1f%%))", (int)rest, rest / percent); | |
| 1878 tty->print_cr("(avg. %s = %3.1f, max = %d)", name, weighted_sum / sum, n); | |
| 1879 } | |
| 1880 | |
| 1881 void print_histogram() { | |
| 1882 tty->print_cr("\nHistogram of call arity (incl. rcvr, calls to compiled methods only):"); | |
| 1883 print_histogram_helper(_max_arity, _arity_histogram, "arity"); | |
| 1884 tty->print_cr("\nSame for parameter size (in words):"); | |
| 1885 print_histogram_helper(_max_size, _size_histogram, "size"); | |
| 1886 tty->cr(); | |
| 1887 } | |
| 1888 | |
| 1889 public: | |
| 1890 MethodArityHistogram() { | |
| 1891 MutexLockerEx mu(CodeCache_lock, Mutex::_no_safepoint_check_flag); | |
| 1892 _max_arity = _max_size = 0; | |
| 1893 for (int i = 0; i < MAX_ARITY; i++) _arity_histogram[i] = _size_histogram [i] = 0; | |
| 1894 CodeCache::nmethods_do(add_method_to_histogram); | |
| 1895 print_histogram(); | |
| 1896 } | |
| 1897 }; | |
| 1898 | |
| 1899 int MethodArityHistogram::_arity_histogram[MethodArityHistogram::MAX_ARITY]; | |
| 1900 int MethodArityHistogram::_size_histogram[MethodArityHistogram::MAX_ARITY]; | |
| 1901 int MethodArityHistogram::_max_arity; | |
| 1902 int MethodArityHistogram::_max_size; | |
| 1903 | |
| 1904 void SharedRuntime::print_call_statistics(int comp_total) { | |
| 1905 tty->print_cr("Calls from compiled code:"); | |
| 1906 int total = _nof_normal_calls + _nof_interface_calls + _nof_static_calls; | |
| 1907 int mono_c = _nof_normal_calls - _nof_optimized_calls - _nof_megamorphic_calls; | |
| 1908 int mono_i = _nof_interface_calls - _nof_optimized_interface_calls - _nof_megamorphic_interface_calls; | |
| 1909 tty->print_cr("\t%9d (%4.1f%%) total non-inlined ", total, percent(total, total)); | |
| 1910 tty->print_cr("\t%9d (%4.1f%%) virtual calls ", _nof_normal_calls, percent(_nof_normal_calls, total)); | |
| 1911 tty->print_cr("\t %9d (%3.0f%%) inlined ", _nof_inlined_calls, percent(_nof_inlined_calls, _nof_normal_calls)); | |
| 1912 tty->print_cr("\t %9d (%3.0f%%) optimized ", _nof_optimized_calls, percent(_nof_optimized_calls, _nof_normal_calls)); | |
| 1913 tty->print_cr("\t %9d (%3.0f%%) monomorphic ", mono_c, percent(mono_c, _nof_normal_calls)); | |
| 1914 tty->print_cr("\t %9d (%3.0f%%) megamorphic ", _nof_megamorphic_calls, percent(_nof_megamorphic_calls, _nof_normal_calls)); | |
| 1915 tty->print_cr("\t%9d (%4.1f%%) interface calls ", _nof_interface_calls, percent(_nof_interface_calls, total)); | |
| 1916 tty->print_cr("\t %9d (%3.0f%%) inlined ", _nof_inlined_interface_calls, percent(_nof_inlined_interface_calls, _nof_interface_calls)); | |
| 1917 tty->print_cr("\t %9d (%3.0f%%) optimized ", _nof_optimized_interface_calls, percent(_nof_optimized_interface_calls, _nof_interface_calls)); | |
| 1918 tty->print_cr("\t %9d (%3.0f%%) monomorphic ", mono_i, percent(mono_i, _nof_interface_calls)); | |
| 1919 tty->print_cr("\t %9d (%3.0f%%) megamorphic ", _nof_megamorphic_interface_calls, percent(_nof_megamorphic_interface_calls, _nof_interface_calls)); | |
| 1920 tty->print_cr("\t%9d (%4.1f%%) static/special calls", _nof_static_calls, percent(_nof_static_calls, total)); | |
| 1921 tty->print_cr("\t %9d (%3.0f%%) inlined ", _nof_inlined_static_calls, percent(_nof_inlined_static_calls, _nof_static_calls)); | |
| 1922 tty->cr(); | |
| 1923 tty->print_cr("Note 1: counter updates are not MT-safe."); | |
| 1924 tty->print_cr("Note 2: %% in major categories are relative to total non-inlined calls;"); | |
| 1925 tty->print_cr(" %% in nested categories are relative to their category"); | |
| 1926 tty->print_cr(" (and thus add up to more than 100%% with inlining)"); | |
| 1927 tty->cr(); | |
| 1928 | |
| 1929 MethodArityHistogram h; | |
| 1930 } | |
| 1931 #endif | |
| 1932 | |
| 1933 | |
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1934 // A simple wrapper class around the calling convention information |
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1935 // that allows sharing of adapters for the same calling convention. |
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1936 class AdapterFingerPrint : public CHeapObj { |
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1937 private: |
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1938 union { |
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1939 int _compact[3]; |
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1940 int* _fingerprint; |
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1941 } _value; |
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1942 int _length; // A negative length indicates the fingerprint is in the compact form, |
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1943 // Otherwise _value._fingerprint is the array. |
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1944 |
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1945 // Remap BasicTypes that are handled equivalently by the adapters. |
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1946 // These are correct for the current system but someday it might be |
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1947 // necessary to make this mapping platform dependent. |
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1948 static BasicType adapter_encoding(BasicType in) { |
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1949 assert((~0xf & in) == 0, "must fit in 4 bits"); |
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1950 switch(in) { |
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1951 case T_BOOLEAN: |
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1952 case T_BYTE: |
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1953 case T_SHORT: |
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1954 case T_CHAR: |
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1955 // There are all promoted to T_INT in the calling convention |
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1956 return T_INT; |
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1957 |
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1958 case T_OBJECT: |
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1959 case T_ARRAY: |
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1960 #ifdef _LP64 |
| 1506 | 1961 return T_LONG; |
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1962 #else |
| 1506 | 1963 return T_INT; |
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1964 #endif |
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1965 |
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1966 case T_INT: |
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1967 case T_LONG: |
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1968 case T_FLOAT: |
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1969 case T_DOUBLE: |
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1970 case T_VOID: |
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1971 return in; |
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1972 |
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1973 default: |
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1974 ShouldNotReachHere(); |
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1975 return T_CONFLICT; |
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1976 } |
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1977 } |
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1978 |
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1979 public: |
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1980 AdapterFingerPrint(int total_args_passed, BasicType* sig_bt) { |
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1981 // The fingerprint is based on the BasicType signature encoded |
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1982 // into an array of ints with four entries per int. |
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1983 int* ptr; |
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1984 int len = (total_args_passed + 3) >> 2; |
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1985 if (len <= (int)(sizeof(_value._compact) / sizeof(int))) { |
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1986 _value._compact[0] = _value._compact[1] = _value._compact[2] = 0; |
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1987 // Storing the signature encoded as signed chars hits about 98% |
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1988 // of the time. |
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1989 _length = -len; |
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1990 ptr = _value._compact; |
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1991 } else { |
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1992 _length = len; |
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1993 _value._fingerprint = NEW_C_HEAP_ARRAY(int, _length); |
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1994 ptr = _value._fingerprint; |
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1995 } |
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1996 |
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1997 // Now pack the BasicTypes with 4 per int |
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|
1998 int sig_index = 0; |
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1999 for (int index = 0; index < len; index++) { |
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2000 int value = 0; |
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2001 for (int byte = 0; byte < 4; byte++) { |
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2002 if (sig_index < total_args_passed) { |
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2003 value = (value << 4) | adapter_encoding(sig_bt[sig_index++]); |
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2004 } |
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2005 } |
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2006 ptr[index] = value; |
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2007 } |
|
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2008 } |
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|
2009 |
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|
2010 ~AdapterFingerPrint() { |
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2011 if (_length > 0) { |
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2012 FREE_C_HEAP_ARRAY(int, _value._fingerprint); |
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2013 } |
|
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|
2014 } |
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|
2015 |
|
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|
2016 int value(int index) { |
|
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2017 if (_length < 0) { |
|
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2018 return _value._compact[index]; |
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2019 } |
|
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|
2020 return _value._fingerprint[index]; |
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2021 } |
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|
2022 int length() { |
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|
2023 if (_length < 0) return -_length; |
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|
2024 return _length; |
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|
2025 } |
|
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|
2026 |
|
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|
2027 bool is_compact() { |
|
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|
2028 return _length <= 0; |
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|
2029 } |
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|
2030 |
|
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|
2031 unsigned int compute_hash() { |
|
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|
2032 int hash = 0; |
|
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2033 for (int i = 0; i < length(); i++) { |
|
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|
2034 int v = value(i); |
|
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2035 hash = (hash << 8) ^ v ^ (hash >> 5); |
|
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|
2036 } |
|
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|
2037 return (unsigned int)hash; |
|
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|
2038 } |
|
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|
2039 |
|
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|
2040 const char* as_string() { |
|
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|
2041 stringStream st; |
|
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|
2042 for (int i = 0; i < length(); i++) { |
|
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|
2043 st.print(PTR_FORMAT, value(i)); |
|
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|
2044 } |
|
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|
2045 return st.as_string(); |
|
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|
2046 } |
|
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|
2047 |
|
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|
2048 bool equals(AdapterFingerPrint* other) { |
|
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|
2049 if (other->_length != _length) { |
|
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|
2050 return false; |
|
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|
2051 } |
|
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|
2052 if (_length < 0) { |
|
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|
2053 return _value._compact[0] == other->_value._compact[0] && |
|
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|
2054 _value._compact[1] == other->_value._compact[1] && |
|
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|
2055 _value._compact[2] == other->_value._compact[2]; |
|
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|
2056 } else { |
|
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|
2057 for (int i = 0; i < _length; i++) { |
|
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|
2058 if (_value._fingerprint[i] != other->_value._fingerprint[i]) { |
|
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|
2059 return false; |
|
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|
2060 } |
|
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|
2061 } |
|
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|
2062 } |
|
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|
2063 return true; |
|
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|
2064 } |
|
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|
2065 }; |
|
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|
2066 |
|
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|
2067 |
|
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|
2068 // A hashtable mapping from AdapterFingerPrints to AdapterHandlerEntries |
|
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|
2069 class AdapterHandlerTable : public BasicHashtable { |
|
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|
2070 friend class AdapterHandlerTableIterator; |
|
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|
2071 |
|
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|
2072 private: |
|
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|
2073 |
|
1263
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|
2074 #ifndef PRODUCT |
|
1187
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|
2075 static int _lookups; // number of calls to lookup |
|
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|
2076 static int _buckets; // number of buckets checked |
|
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|
2077 static int _equals; // number of buckets checked with matching hash |
|
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|
2078 static int _hits; // number of successful lookups |
|
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|
2079 static int _compact; // number of equals calls with compact signature |
|
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|
2080 #endif |
|
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|
2081 |
|
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|
2082 AdapterHandlerEntry* bucket(int i) { |
|
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|
2083 return (AdapterHandlerEntry*)BasicHashtable::bucket(i); |
|
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|
2084 } |
|
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|
2085 |
|
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|
2086 public: |
|
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diff
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|
2087 AdapterHandlerTable() |
|
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|
2088 : BasicHashtable(293, sizeof(AdapterHandlerEntry)) { } |
|
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|
2089 |
|
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|
2090 // Create a new entry suitable for insertion in the table |
|
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|
2091 AdapterHandlerEntry* new_entry(AdapterFingerPrint* fingerprint, address i2c_entry, address c2i_entry, address c2i_unverified_entry) { |
|
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|
2092 AdapterHandlerEntry* entry = (AdapterHandlerEntry*)BasicHashtable::new_entry(fingerprint->compute_hash()); |
|
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|
2093 entry->init(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry); |
|
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|
2094 return entry; |
|
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|
2095 } |
|
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|
2096 |
|
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|
2097 // Insert an entry into the table |
|
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|
2098 void add(AdapterHandlerEntry* entry) { |
|
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|
2099 int index = hash_to_index(entry->hash()); |
|
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|
2100 add_entry(index, entry); |
|
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|
2101 } |
|
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|
2102 |
|
1207
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|
2103 void free_entry(AdapterHandlerEntry* entry) { |
|
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|
2104 entry->deallocate(); |
|
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|
2105 BasicHashtable::free_entry(entry); |
|
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|
2106 } |
|
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|
2107 |
|
1187
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|
2108 // Find a entry with the same fingerprint if it exists |
|
1207
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|
2109 AdapterHandlerEntry* lookup(int total_args_passed, BasicType* sig_bt) { |
|
1263
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|
2110 NOT_PRODUCT(_lookups++); |
|
1207
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|
2111 AdapterFingerPrint fp(total_args_passed, sig_bt); |
|
1187
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|
2112 unsigned int hash = fp.compute_hash(); |
|
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|
2113 int index = hash_to_index(hash); |
|
cf0685d550f1
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|
2114 for (AdapterHandlerEntry* e = bucket(index); e != NULL; e = e->next()) { |
|
1263
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|
2115 NOT_PRODUCT(_buckets++); |
|
1187
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|
2116 if (e->hash() == hash) { |
|
1263
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|
2117 NOT_PRODUCT(_equals++); |
|
1187
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|
2118 if (fp.equals(e->fingerprint())) { |
|
1263
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|
2119 #ifndef PRODUCT |
|
1187
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|
2120 if (fp.is_compact()) _compact++; |
|
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|
2121 _hits++; |
|
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|
2122 #endif |
|
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|
2123 return e; |
|
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|
2124 } |
|
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|
2125 } |
|
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diff
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|
2126 } |
|
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|
2127 return NULL; |
|
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|
2128 } |
|
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|
2129 |
|
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|
2130 #ifndef PRODUCT |
|
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|
2131 void print_statistics() { |
|
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|
2132 ResourceMark rm; |
|
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|
2133 int longest = 0; |
|
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|
2134 int empty = 0; |
|
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|
2135 int total = 0; |
|
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|
2136 int nonempty = 0; |
|
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|
2137 for (int index = 0; index < table_size(); index++) { |
|
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|
2138 int count = 0; |
|
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|
2139 for (AdapterHandlerEntry* e = bucket(index); e != NULL; e = e->next()) { |
|
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|
2140 count++; |
|
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|
2141 } |
|
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|
2142 if (count != 0) nonempty++; |
|
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|
2143 if (count == 0) empty++; |
|
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|
2144 if (count > longest) longest = count; |
|
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|
2145 total += count; |
|
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|
2146 } |
|
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|
2147 tty->print_cr("AdapterHandlerTable: empty %d longest %d total %d average %f", |
|
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|
2148 empty, longest, total, total / (double)nonempty); |
|
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|
2149 tty->print_cr("AdapterHandlerTable: lookups %d buckets %d equals %d hits %d compact %d", |
|
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|
2150 _lookups, _buckets, _equals, _hits, _compact); |
|
1263
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|
2151 } |
|
1187
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|
2152 #endif |
|
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|
2153 }; |
|
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|
2154 |
|
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|
2155 |
|
1263
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|
2156 #ifndef PRODUCT |
|
1187
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|
2157 |
|
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|
2158 int AdapterHandlerTable::_lookups; |
|
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|
2159 int AdapterHandlerTable::_buckets; |
|
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|
2160 int AdapterHandlerTable::_equals; |
|
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|
2161 int AdapterHandlerTable::_hits; |
|
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|
2162 int AdapterHandlerTable::_compact; |
|
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|
2163 |
|
1681
126ea7725993
6953477: Increase portability and flexibility of building Hotspot
bobv
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1644
diff
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|
2164 #endif |
|
126ea7725993
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diff
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|
2165 |
|
1187
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|
2166 class AdapterHandlerTableIterator : public StackObj { |
|
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|
2167 private: |
|
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|
2168 AdapterHandlerTable* _table; |
|
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|
2169 int _index; |
|
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|
2170 AdapterHandlerEntry* _current; |
|
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|
2171 |
|
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|
2172 void scan() { |
|
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|
2173 while (_index < _table->table_size()) { |
|
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|
2174 AdapterHandlerEntry* a = _table->bucket(_index); |
| 1564 | 2175 _index++; |
|
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|
2176 if (a != NULL) { |
|
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|
2177 _current = a; |
|
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|
2178 return; |
|
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|
2179 } |
|
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|
2180 } |
|
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|
2181 } |
|
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|
2182 |
|
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|
2183 public: |
|
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never
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|
2184 AdapterHandlerTableIterator(AdapterHandlerTable* table): _table(table), _index(0), _current(NULL) { |
|
cf0685d550f1
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|
2185 scan(); |
|
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never
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|
2186 } |
|
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|
2187 bool has_next() { |
|
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|
2188 return _current != NULL; |
|
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|
2189 } |
|
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|
2190 AdapterHandlerEntry* next() { |
|
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|
2191 if (_current != NULL) { |
|
cf0685d550f1
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|
2192 AdapterHandlerEntry* result = _current; |
|
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|
2193 _current = _current->next(); |
|
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|
2194 if (_current == NULL) scan(); |
|
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|
2195 return result; |
|
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|
2196 } else { |
|
cf0685d550f1
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|
2197 return NULL; |
|
cf0685d550f1
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never
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diff
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|
2198 } |
|
cf0685d550f1
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never
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|
2199 } |
|
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never
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|
2200 }; |
|
cf0685d550f1
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never
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|
2201 |
|
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|
2202 |
| 0 | 2203 // --------------------------------------------------------------------------- |
| 2204 // Implementation of AdapterHandlerLibrary | |
|
1187
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|
2205 AdapterHandlerTable* AdapterHandlerLibrary::_adapters = NULL; |
|
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|
2206 AdapterHandlerEntry* AdapterHandlerLibrary::_abstract_method_handler = NULL; |
| 0 | 2207 const int AdapterHandlerLibrary_size = 16*K; |
|
742
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|
2208 BufferBlob* AdapterHandlerLibrary::_buffer = NULL; |
|
45463a04ca27
6834177: Running jsynprog on Solaris Nevada can cause JVM crash
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|
2209 |
|
45463a04ca27
6834177: Running jsynprog on Solaris Nevada can cause JVM crash
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|
2210 BufferBlob* AdapterHandlerLibrary::buffer_blob() { |
|
45463a04ca27
6834177: Running jsynprog on Solaris Nevada can cause JVM crash
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|
2211 // Should be called only when AdapterHandlerLibrary_lock is active. |
|
45463a04ca27
6834177: Running jsynprog on Solaris Nevada can cause JVM crash
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|
2212 if (_buffer == NULL) // Initialize lazily |
|
45463a04ca27
6834177: Running jsynprog on Solaris Nevada can cause JVM crash
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|
2213 _buffer = BufferBlob::create("adapters", AdapterHandlerLibrary_size); |
|
45463a04ca27
6834177: Running jsynprog on Solaris Nevada can cause JVM crash
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|
2214 return _buffer; |
|
45463a04ca27
6834177: Running jsynprog on Solaris Nevada can cause JVM crash
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|
2215 } |
| 0 | 2216 |
| 2217 void AdapterHandlerLibrary::initialize() { | |
|
1187
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|
2218 if (_adapters != NULL) return; |
|
cf0685d550f1
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|
2219 _adapters = new AdapterHandlerTable(); |
| 0 | 2220 |
| 2221 // Create a special handler for abstract methods. Abstract methods | |
| 2222 // are never compiled so an i2c entry is somewhat meaningless, but | |
| 2223 // fill it in with something appropriate just in case. Pass handle | |
| 2224 // wrong method for the c2i transitions. | |
| 2225 address wrong_method = SharedRuntime::get_handle_wrong_method_stub(); | |
|
1187
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6911204: generated adapters with large signatures can fill up the code cache
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|
2226 _abstract_method_handler = AdapterHandlerLibrary::new_entry(new AdapterFingerPrint(0, NULL), |
|
cf0685d550f1
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never
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|
2227 StubRoutines::throw_AbstractMethodError_entry(), |
|
cf0685d550f1
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never
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|
2228 wrong_method, wrong_method); |
| 0 | 2229 } |
| 2230 | |
|
1187
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|
2231 AdapterHandlerEntry* AdapterHandlerLibrary::new_entry(AdapterFingerPrint* fingerprint, |
|
cf0685d550f1
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never
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|
2232 address i2c_entry, |
|
cf0685d550f1
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changeset
|
2233 address c2i_entry, |
|
cf0685d550f1
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never
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diff
changeset
|
2234 address c2i_unverified_entry) { |
|
cf0685d550f1
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never
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|
2235 return _adapters->new_entry(fingerprint, i2c_entry, c2i_entry, c2i_unverified_entry); |
|
cf0685d550f1
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|
2236 } |
|
cf0685d550f1
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|
2237 |
|
cf0685d550f1
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|
2238 AdapterHandlerEntry* AdapterHandlerLibrary::get_adapter(methodHandle method) { |
|
cf0685d550f1
6911204: generated adapters with large signatures can fill up the code cache
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|
2239 // Use customized signature handler. Need to lock around updates to |
|
cf0685d550f1
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|
2240 // the AdapterHandlerTable (it is not safe for concurrent readers |
|
cf0685d550f1
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never
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|
2241 // and a single writer: this could be fixed if it becomes a |
|
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|
2242 // problem). |
| 0 | 2243 |
| 2244 // Get the address of the ic_miss handlers before we grab the | |
| 2245 // AdapterHandlerLibrary_lock. This fixes bug 6236259 which | |
| 2246 // was caused by the initialization of the stubs happening | |
| 2247 // while we held the lock and then notifying jvmti while | |
| 2248 // holding it. This just forces the initialization to be a little | |
| 2249 // earlier. | |
| 2250 address ic_miss = SharedRuntime::get_ic_miss_stub(); | |
| 2251 assert(ic_miss != NULL, "must have handler"); | |
| 2252 | |
|
1187
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6911204: generated adapters with large signatures can fill up the code cache
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|
2253 ResourceMark rm; |
|
cf0685d550f1
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never
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diff
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|
2254 |
| 1748 | 2255 NOT_PRODUCT(int insts_size); |
|
1299
9eba43136cb5
6934494: JSR 292 MethodHandles adapters should be generated into their own CodeBlob
twisti
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1295
diff
changeset
|
2256 AdapterBlob* B = NULL; |
|
742
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diff
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|
2257 AdapterHandlerEntry* entry = NULL; |
|
1187
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|
2258 AdapterFingerPrint* fingerprint = NULL; |
| 0 | 2259 { |
| 2260 MutexLocker mu(AdapterHandlerLibrary_lock); | |
| 2261 // make sure data structure is initialized | |
| 2262 initialize(); | |
| 2263 | |
| 2264 if (method->is_abstract()) { | |
|
1187
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|
2265 return _abstract_method_handler; |
| 0 | 2266 } |
| 2267 | |
|
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2268 // Fill in the signature array, for the calling-convention call. |
|
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2269 int total_args_passed = method->size_of_parameters(); // All args on stack |
|
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|
2270 |
|
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|
2271 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType, total_args_passed); |
|
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2272 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair, total_args_passed); |
|
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2273 int i = 0; |
|
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|
2274 if (!method->is_static()) // Pass in receiver first |
|
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2275 sig_bt[i++] = T_OBJECT; |
|
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2276 for (SignatureStream ss(method->signature()); !ss.at_return_type(); ss.next()) { |
|
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2277 sig_bt[i++] = ss.type(); // Collect remaining bits of signature |
|
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2278 if (ss.type() == T_LONG || ss.type() == T_DOUBLE) |
|
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2279 sig_bt[i++] = T_VOID; // Longs & doubles take 2 Java slots |
|
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2280 } |
|
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|
2281 assert(i == total_args_passed, ""); |
|
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2282 |
|
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2283 // Lookup method signature's fingerprint |
|
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2284 entry = _adapters->lookup(total_args_passed, sig_bt); |
|
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2285 |
|
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|
2286 #ifdef ASSERT |
|
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|
2287 AdapterHandlerEntry* shared_entry = NULL; |
|
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2288 if (VerifyAdapterSharing && entry != NULL) { |
|
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|
2289 shared_entry = entry; |
|
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|
2290 entry = NULL; |
|
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|
2291 } |
|
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|
2292 #endif |
|
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|
2293 |
|
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2294 if (entry != NULL) { |
|
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2295 return entry; |
| 0 | 2296 } |
| 2297 | |
|
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2298 // Get a description of the compiled java calling convention and the largest used (VMReg) stack slot usage |
|
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2299 int comp_args_on_stack = SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed, false); |
|
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2300 |
|
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2301 // Make a C heap allocated version of the fingerprint to store in the adapter |
|
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|
2302 fingerprint = new AdapterFingerPrint(total_args_passed, sig_bt); |
|
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2303 |
| 0 | 2304 // Create I2C & C2I handlers |
| 2305 | |
|
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2306 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache |
|
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2307 if (buf != NULL) { |
| 1748 | 2308 CodeBuffer buffer(buf); |
|
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2309 short buffer_locs[20]; |
|
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2310 buffer.insts()->initialize_shared_locs((relocInfo*)buffer_locs, |
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2311 sizeof(buffer_locs)/sizeof(relocInfo)); |
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2312 MacroAssembler _masm(&buffer); |
|
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2313 |
|
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2314 entry = SharedRuntime::generate_i2c2i_adapters(&_masm, |
|
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2315 total_args_passed, |
|
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2316 comp_args_on_stack, |
|
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|
2317 sig_bt, |
|
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2318 regs, |
|
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|
2319 fingerprint); |
| 0 | 2320 |
|
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|
2321 #ifdef ASSERT |
|
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2322 if (VerifyAdapterSharing) { |
|
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|
2323 if (shared_entry != NULL) { |
| 1748 | 2324 assert(shared_entry->compare_code(buf->code_begin(), buffer.insts_size(), total_args_passed, sig_bt), |
|
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|
2325 "code must match"); |
|
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|
2326 // Release the one just created and return the original |
|
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|
2327 _adapters->free_entry(entry); |
|
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|
2328 return shared_entry; |
|
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|
2329 } else { |
| 1748 | 2330 entry->save_code(buf->code_begin(), buffer.insts_size(), total_args_passed, sig_bt); |
|
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2331 } |
|
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2332 } |
|
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|
2333 #endif |
|
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|
2334 |
|
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2335 B = AdapterBlob::create(&buffer); |
| 1748 | 2336 NOT_PRODUCT(insts_size = buffer.insts_size()); |
|
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2337 } |
| 28 | 2338 if (B == NULL) { |
| 2339 // CodeCache is full, disable compilation | |
| 2340 // Ought to log this but compile log is only per compile thread | |
| 2341 // and we're some non descript Java thread. | |
| 1202 | 2342 MutexUnlocker mu(AdapterHandlerLibrary_lock); |
| 2343 CompileBroker::handle_full_code_cache(); | |
|
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2344 return NULL; // Out of CodeCache space |
| 28 | 2345 } |
| 1748 | 2346 entry->relocate(B->content_begin()); |
| 0 | 2347 #ifndef PRODUCT |
| 2348 // debugging suppport | |
| 2349 if (PrintAdapterHandlers) { | |
| 2350 tty->cr(); | |
|
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|
2351 tty->print_cr("i2c argument handler #%d for: %s %s (fingerprint = %s, %d bytes generated)", |
|
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2352 _adapters->number_of_entries(), (method->is_static() ? "static" : "receiver"), |
| 1748 | 2353 method->signature()->as_C_string(), fingerprint->as_string(), insts_size ); |
| 0 | 2354 tty->print_cr("c2i argument handler starts at %p",entry->get_c2i_entry()); |
| 1748 | 2355 Disassembler::decode(entry->get_i2c_entry(), entry->get_i2c_entry() + insts_size); |
| 0 | 2356 } |
| 2357 #endif | |
| 2358 | |
|
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|
2359 _adapters->add(entry); |
| 0 | 2360 } |
| 2361 // Outside of the lock | |
| 2362 if (B != NULL) { | |
| 2363 char blob_id[256]; | |
| 2364 jio_snprintf(blob_id, | |
| 2365 sizeof(blob_id), | |
|
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|
2366 "%s(%s)@" PTR_FORMAT, |
|
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|
2367 B->name(), |
|
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|
2368 fingerprint->as_string(), |
| 1748 | 2369 B->content_begin()); |
| 2370 Forte::register_stub(blob_id, B->content_begin(), B->content_end()); | |
| 0 | 2371 |
| 2372 if (JvmtiExport::should_post_dynamic_code_generated()) { | |
| 1748 | 2373 JvmtiExport::post_dynamic_code_generated(blob_id, B->content_begin(), B->content_end()); |
| 0 | 2374 } |
| 2375 } | |
|
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|
2376 return entry; |
| 0 | 2377 } |
| 2378 | |
| 2379 void AdapterHandlerEntry::relocate(address new_base) { | |
| 2380 ptrdiff_t delta = new_base - _i2c_entry; | |
| 2381 _i2c_entry += delta; | |
| 2382 _c2i_entry += delta; | |
| 2383 _c2i_unverified_entry += delta; | |
| 2384 } | |
| 2385 | |
|
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|
2386 |
|
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|
2387 void AdapterHandlerEntry::deallocate() { |
|
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|
2388 delete _fingerprint; |
|
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|
2389 #ifdef ASSERT |
|
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|
2390 if (_saved_code) FREE_C_HEAP_ARRAY(unsigned char, _saved_code); |
|
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|
2391 if (_saved_sig) FREE_C_HEAP_ARRAY(Basictype, _saved_sig); |
|
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|
2392 #endif |
|
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|
2393 } |
|
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|
2394 |
|
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|
2395 |
|
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|
2396 #ifdef ASSERT |
|
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|
2397 // Capture the code before relocation so that it can be compared |
|
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|
2398 // against other versions. If the code is captured after relocation |
|
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|
2399 // then relative instructions won't be equivalent. |
|
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|
2400 void AdapterHandlerEntry::save_code(unsigned char* buffer, int length, int total_args_passed, BasicType* sig_bt) { |
|
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2401 _saved_code = NEW_C_HEAP_ARRAY(unsigned char, length); |
|
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|
2402 _code_length = length; |
|
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|
2403 memcpy(_saved_code, buffer, length); |
|
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|
2404 _total_args_passed = total_args_passed; |
|
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|
2405 _saved_sig = NEW_C_HEAP_ARRAY(BasicType, _total_args_passed); |
|
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|
2406 memcpy(_saved_sig, sig_bt, _total_args_passed * sizeof(BasicType)); |
|
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2407 } |
|
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2408 |
|
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2409 |
|
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2410 bool AdapterHandlerEntry::compare_code(unsigned char* buffer, int length, int total_args_passed, BasicType* sig_bt) { |
|
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2411 if (length != _code_length) { |
|
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|
2412 return false; |
|
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|
2413 } |
|
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2414 for (int i = 0; i < length; i++) { |
|
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2415 if (buffer[i] != _saved_code[i]) { |
|
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|
2416 return false; |
|
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|
2417 } |
|
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|
2418 } |
|
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|
2419 return true; |
|
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|
2420 } |
|
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|
2421 #endif |
|
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2422 |
|
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2423 |
| 0 | 2424 // Create a native wrapper for this native method. The wrapper converts the |
| 2425 // java compiled calling convention to the native convention, handlizes | |
| 2426 // arguments, and transitions to native. On return from the native we transition | |
| 2427 // back to java blocking if a safepoint is in progress. | |
| 2428 nmethod *AdapterHandlerLibrary::create_native_wrapper(methodHandle method) { | |
| 2429 ResourceMark rm; | |
| 2430 nmethod* nm = NULL; | |
| 2431 | |
| 2432 if (PrintCompilation) { | |
| 2433 ttyLocker ttyl; | |
| 2434 tty->print("--- n%s ", (method->is_synchronized() ? "s" : " ")); | |
| 2435 method->print_short_name(tty); | |
| 2436 if (method->is_static()) { | |
| 2437 tty->print(" (static)"); | |
| 2438 } | |
| 2439 tty->cr(); | |
| 2440 } | |
| 2441 | |
| 2442 assert(method->has_native_function(), "must have something valid to call!"); | |
| 2443 | |
| 2444 { | |
| 2445 // perform the work while holding the lock, but perform any printing outside the lock | |
| 2446 MutexLocker mu(AdapterHandlerLibrary_lock); | |
| 2447 // See if somebody beat us to it | |
| 2448 nm = method->code(); | |
| 2449 if (nm) { | |
| 2450 return nm; | |
| 2451 } | |
| 2452 | |
|
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2453 ResourceMark rm; |
| 0 | 2454 |
|
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2455 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache |
|
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2456 if (buf != NULL) { |
| 1748 | 2457 CodeBuffer buffer(buf); |
|
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2458 double locs_buf[20]; |
|
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2459 buffer.insts()->initialize_shared_locs((relocInfo*)locs_buf, sizeof(locs_buf) / sizeof(relocInfo)); |
|
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2460 MacroAssembler _masm(&buffer); |
|
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2461 |
|
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2462 // Fill in the signature array, for the calling-convention call. |
|
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2463 int total_args_passed = method->size_of_parameters(); |
| 0 | 2464 |
|
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2465 BasicType* sig_bt = NEW_RESOURCE_ARRAY(BasicType,total_args_passed); |
|
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2466 VMRegPair* regs = NEW_RESOURCE_ARRAY(VMRegPair,total_args_passed); |
|
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2467 int i=0; |
|
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2468 if( !method->is_static() ) // Pass in receiver first |
|
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2469 sig_bt[i++] = T_OBJECT; |
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|
2470 SignatureStream ss(method->signature()); |
|
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2471 for( ; !ss.at_return_type(); ss.next()) { |
|
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2472 sig_bt[i++] = ss.type(); // Collect remaining bits of signature |
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2473 if( ss.type() == T_LONG || ss.type() == T_DOUBLE ) |
|
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2474 sig_bt[i++] = T_VOID; // Longs & doubles take 2 Java slots |
|
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2475 } |
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2476 assert( i==total_args_passed, "" ); |
|
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2477 BasicType ret_type = ss.type(); |
|
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2478 |
|
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|
2479 // Now get the compiled-Java layout as input arguments |
|
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|
2480 int comp_args_on_stack; |
|
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2481 comp_args_on_stack = SharedRuntime::java_calling_convention(sig_bt, regs, total_args_passed, false); |
|
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2482 |
|
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|
2483 // Generate the compiled-to-native wrapper code |
|
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2484 nm = SharedRuntime::generate_native_wrapper(&_masm, |
|
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|
2485 method, |
|
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|
2486 total_args_passed, |
|
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|
2487 comp_args_on_stack, |
|
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|
2488 sig_bt,regs, |
|
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|
2489 ret_type); |
| 0 | 2490 } |
| 2491 } | |
| 2492 | |
| 2493 // Must unlock before calling set_code | |
|
1728
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|
2494 |
| 0 | 2495 // Install the generated code. |
| 2496 if (nm != NULL) { | |
| 2497 method->set_code(method, nm); | |
| 2498 nm->post_compiled_method_load_event(); | |
| 2499 } else { | |
| 2500 // CodeCache is full, disable compilation | |
| 1202 | 2501 CompileBroker::handle_full_code_cache(); |
| 0 | 2502 } |
| 2503 return nm; | |
| 2504 } | |
| 2505 | |
|
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2506 #ifdef HAVE_DTRACE_H |
|
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2507 // Create a dtrace nmethod for this method. The wrapper converts the |
|
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2508 // java compiled calling convention to the native convention, makes a dummy call |
|
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2509 // (actually nops for the size of the call instruction, which become a trap if |
|
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2510 // probe is enabled). The returns to the caller. Since this all looks like a |
|
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2511 // leaf no thread transition is needed. |
|
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2512 |
|
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|
2513 nmethod *AdapterHandlerLibrary::create_dtrace_nmethod(methodHandle method) { |
|
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2514 ResourceMark rm; |
|
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2515 nmethod* nm = NULL; |
|
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2516 |
|
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2517 if (PrintCompilation) { |
|
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2518 ttyLocker ttyl; |
|
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2519 tty->print("--- n%s "); |
|
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2520 method->print_short_name(tty); |
|
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2521 if (method->is_static()) { |
|
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2522 tty->print(" (static)"); |
|
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|
2523 } |
|
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|
2524 tty->cr(); |
|
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|
2525 } |
|
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|
2526 |
|
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|
2527 { |
|
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|
2528 // perform the work while holding the lock, but perform any printing |
|
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2529 // outside the lock |
|
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|
2530 MutexLocker mu(AdapterHandlerLibrary_lock); |
|
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2531 // See if somebody beat us to it |
|
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|
2532 nm = method->code(); |
|
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|
2533 if (nm) { |
|
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|
2534 return nm; |
|
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|
2535 } |
|
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|
2536 |
|
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|
2537 ResourceMark rm; |
|
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|
2538 |
|
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|
2539 BufferBlob* buf = buffer_blob(); // the temporary code buffer in CodeCache |
|
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|
2540 if (buf != NULL) { |
| 1748 | 2541 CodeBuffer buffer(buf); |
|
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|
2542 // Need a few relocation entries |
|
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|
2543 double locs_buf[20]; |
|
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|
2544 buffer.insts()->initialize_shared_locs( |
|
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2545 (relocInfo*)locs_buf, sizeof(locs_buf) / sizeof(relocInfo)); |
|
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2546 MacroAssembler _masm(&buffer); |
|
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2547 |
|
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|
2548 // Generate the compiled-to-native wrapper code |
|
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|
2549 nm = SharedRuntime::generate_dtrace_nmethod(&_masm, method); |
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2550 } |
|
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2551 } |
|
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|
2552 return nm; |
|
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|
2553 } |
|
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|
2554 |
|
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|
2555 // the dtrace method needs to convert java lang string to utf8 string. |
|
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|
2556 void SharedRuntime::get_utf(oopDesc* src, address dst) { |
|
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2557 typeArrayOop jlsValue = java_lang_String::value(src); |
|
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2558 int jlsOffset = java_lang_String::offset(src); |
|
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2559 int jlsLen = java_lang_String::length(src); |
|
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|
2560 jchar* jlsPos = (jlsLen == 0) ? NULL : |
|
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|
2561 jlsValue->char_at_addr(jlsOffset); |
|
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|
2562 (void) UNICODE::as_utf8(jlsPos, jlsLen, (char *)dst, max_dtrace_string_size); |
|
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|
2563 } |
|
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|
2564 #endif // ndef HAVE_DTRACE_H |
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2565 |
| 0 | 2566 // ------------------------------------------------------------------------- |
| 2567 // Java-Java calling convention | |
| 2568 // (what you use when Java calls Java) | |
| 2569 | |
| 2570 //------------------------------name_for_receiver---------------------------------- | |
| 2571 // For a given signature, return the VMReg for parameter 0. | |
| 2572 VMReg SharedRuntime::name_for_receiver() { | |
| 2573 VMRegPair regs; | |
| 2574 BasicType sig_bt = T_OBJECT; | |
| 2575 (void) java_calling_convention(&sig_bt, ®s, 1, true); | |
| 2576 // Return argument 0 register. In the LP64 build pointers | |
| 2577 // take 2 registers, but the VM wants only the 'main' name. | |
| 2578 return regs.first(); | |
| 2579 } | |
| 2580 | |
|
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|
2581 VMRegPair *SharedRuntime::find_callee_arguments(symbolOop sig, bool has_receiver, int* arg_size) { |
| 0 | 2582 // This method is returning a data structure allocating as a |
| 2583 // ResourceObject, so do not put any ResourceMarks in here. | |
| 2584 char *s = sig->as_C_string(); | |
| 2585 int len = (int)strlen(s); | |
| 2586 *s++; len--; // Skip opening paren | |
| 2587 char *t = s+len; | |
| 2588 while( *(--t) != ')' ) ; // Find close paren | |
| 2589 | |
| 2590 BasicType *sig_bt = NEW_RESOURCE_ARRAY( BasicType, 256 ); | |
| 2591 VMRegPair *regs = NEW_RESOURCE_ARRAY( VMRegPair, 256 ); | |
| 2592 int cnt = 0; | |
|
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|
2593 if (has_receiver) { |
| 0 | 2594 sig_bt[cnt++] = T_OBJECT; // Receiver is argument 0; not in signature |
| 2595 } | |
| 2596 | |
| 2597 while( s < t ) { | |
| 2598 switch( *s++ ) { // Switch on signature character | |
| 2599 case 'B': sig_bt[cnt++] = T_BYTE; break; | |
| 2600 case 'C': sig_bt[cnt++] = T_CHAR; break; | |
| 2601 case 'D': sig_bt[cnt++] = T_DOUBLE; sig_bt[cnt++] = T_VOID; break; | |
| 2602 case 'F': sig_bt[cnt++] = T_FLOAT; break; | |
| 2603 case 'I': sig_bt[cnt++] = T_INT; break; | |
| 2604 case 'J': sig_bt[cnt++] = T_LONG; sig_bt[cnt++] = T_VOID; break; | |
| 2605 case 'S': sig_bt[cnt++] = T_SHORT; break; | |
| 2606 case 'Z': sig_bt[cnt++] = T_BOOLEAN; break; | |
| 2607 case 'V': sig_bt[cnt++] = T_VOID; break; | |
| 2608 case 'L': // Oop | |
| 2609 while( *s++ != ';' ) ; // Skip signature | |
| 2610 sig_bt[cnt++] = T_OBJECT; | |
| 2611 break; | |
| 2612 case '[': { // Array | |
| 2613 do { // Skip optional size | |
| 2614 while( *s >= '0' && *s <= '9' ) s++; | |
| 2615 } while( *s++ == '[' ); // Nested arrays? | |
| 2616 // Skip element type | |
| 2617 if( s[-1] == 'L' ) | |
| 2618 while( *s++ != ';' ) ; // Skip signature | |
| 2619 sig_bt[cnt++] = T_ARRAY; | |
| 2620 break; | |
| 2621 } | |
| 2622 default : ShouldNotReachHere(); | |
| 2623 } | |
| 2624 } | |
| 2625 assert( cnt < 256, "grow table size" ); | |
| 2626 | |
| 2627 int comp_args_on_stack; | |
| 2628 comp_args_on_stack = java_calling_convention(sig_bt, regs, cnt, true); | |
| 2629 | |
| 2630 // the calling convention doesn't count out_preserve_stack_slots so | |
| 2631 // we must add that in to get "true" stack offsets. | |
| 2632 | |
| 2633 if (comp_args_on_stack) { | |
| 2634 for (int i = 0; i < cnt; i++) { | |
| 2635 VMReg reg1 = regs[i].first(); | |
| 2636 if( reg1->is_stack()) { | |
| 2637 // Yuck | |
| 2638 reg1 = reg1->bias(out_preserve_stack_slots()); | |
| 2639 } | |
| 2640 VMReg reg2 = regs[i].second(); | |
| 2641 if( reg2->is_stack()) { | |
| 2642 // Yuck | |
| 2643 reg2 = reg2->bias(out_preserve_stack_slots()); | |
| 2644 } | |
| 2645 regs[i].set_pair(reg2, reg1); | |
| 2646 } | |
| 2647 } | |
| 2648 | |
| 2649 // results | |
| 2650 *arg_size = cnt; | |
| 2651 return regs; | |
| 2652 } | |
| 2653 | |
| 2654 // OSR Migration Code | |
| 2655 // | |
| 2656 // This code is used convert interpreter frames into compiled frames. It is | |
| 2657 // called from very start of a compiled OSR nmethod. A temp array is | |
| 2658 // allocated to hold the interesting bits of the interpreter frame. All | |
| 2659 // active locks are inflated to allow them to move. The displaced headers and | |
| 2660 // active interpeter locals are copied into the temp buffer. Then we return | |
| 2661 // back to the compiled code. The compiled code then pops the current | |
| 2662 // interpreter frame off the stack and pushes a new compiled frame. Then it | |
| 2663 // copies the interpreter locals and displaced headers where it wants. | |
| 2664 // Finally it calls back to free the temp buffer. | |
| 2665 // | |
| 2666 // All of this is done NOT at any Safepoint, nor is any safepoint or GC allowed. | |
| 2667 | |
| 2668 JRT_LEAF(intptr_t*, SharedRuntime::OSR_migration_begin( JavaThread *thread) ) | |
| 2669 | |
| 2670 #ifdef IA64 | |
| 2671 ShouldNotReachHere(); // NYI | |
| 2672 #endif /* IA64 */ | |
| 2673 | |
| 2674 // | |
| 2675 // This code is dependent on the memory layout of the interpreter local | |
| 2676 // array and the monitors. On all of our platforms the layout is identical | |
| 2677 // so this code is shared. If some platform lays the their arrays out | |
| 2678 // differently then this code could move to platform specific code or | |
| 2679 // the code here could be modified to copy items one at a time using | |
| 2680 // frame accessor methods and be platform independent. | |
| 2681 | |
| 2682 frame fr = thread->last_frame(); | |
| 2683 assert( fr.is_interpreted_frame(), "" ); | |
| 2684 assert( fr.interpreter_frame_expression_stack_size()==0, "only handle empty stacks" ); | |
| 2685 | |
| 2686 // Figure out how many monitors are active. | |
| 2687 int active_monitor_count = 0; | |
| 2688 for( BasicObjectLock *kptr = fr.interpreter_frame_monitor_end(); | |
| 2689 kptr < fr.interpreter_frame_monitor_begin(); | |
| 2690 kptr = fr.next_monitor_in_interpreter_frame(kptr) ) { | |
| 2691 if( kptr->obj() != NULL ) active_monitor_count++; | |
| 2692 } | |
| 2693 | |
| 2694 // QQQ we could place number of active monitors in the array so that compiled code | |
| 2695 // could double check it. | |
| 2696 | |
| 2697 methodOop moop = fr.interpreter_frame_method(); | |
| 2698 int max_locals = moop->max_locals(); | |
| 2699 // Allocate temp buffer, 1 word per local & 2 per active monitor | |
| 2700 int buf_size_words = max_locals + active_monitor_count*2; | |
| 2701 intptr_t *buf = NEW_C_HEAP_ARRAY(intptr_t,buf_size_words); | |
| 2702 | |
| 2703 // Copy the locals. Order is preserved so that loading of longs works. | |
| 2704 // Since there's no GC I can copy the oops blindly. | |
| 2705 assert( sizeof(HeapWord)==sizeof(intptr_t), "fix this code"); | |
| 1506 | 2706 Copy::disjoint_words((HeapWord*)fr.interpreter_frame_local_at(max_locals-1), |
| 0 | 2707 (HeapWord*)&buf[0], |
| 2708 max_locals); | |
| 2709 | |
| 2710 // Inflate locks. Copy the displaced headers. Be careful, there can be holes. | |
| 2711 int i = max_locals; | |
| 2712 for( BasicObjectLock *kptr2 = fr.interpreter_frame_monitor_end(); | |
| 2713 kptr2 < fr.interpreter_frame_monitor_begin(); | |
| 2714 kptr2 = fr.next_monitor_in_interpreter_frame(kptr2) ) { | |
| 2715 if( kptr2->obj() != NULL) { // Avoid 'holes' in the monitor array | |
| 2716 BasicLock *lock = kptr2->lock(); | |
| 2717 // Inflate so the displaced header becomes position-independent | |
| 2718 if (lock->displaced_header()->is_unlocked()) | |
| 2719 ObjectSynchronizer::inflate_helper(kptr2->obj()); | |
| 2720 // Now the displaced header is free to move | |
| 2721 buf[i++] = (intptr_t)lock->displaced_header(); | |
| 2722 buf[i++] = (intptr_t)kptr2->obj(); | |
| 2723 } | |
| 2724 } | |
| 2725 assert( i - max_locals == active_monitor_count*2, "found the expected number of monitors" ); | |
| 2726 | |
| 2727 return buf; | |
| 2728 JRT_END | |
| 2729 | |
| 2730 JRT_LEAF(void, SharedRuntime::OSR_migration_end( intptr_t* buf) ) | |
| 2731 FREE_C_HEAP_ARRAY(intptr_t,buf); | |
| 2732 JRT_END | |
| 2733 | |
| 2734 bool AdapterHandlerLibrary::contains(CodeBlob* b) { | |
|
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2735 AdapterHandlerTableIterator iter(_adapters); |
|
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2736 while (iter.has_next()) { |
|
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2737 AdapterHandlerEntry* a = iter.next(); |
|
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2738 if ( b == CodeCache::find_blob(a->get_i2c_entry()) ) return true; |
| 0 | 2739 } |
| 2740 return false; | |
| 2741 } | |
| 2742 | |
|
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2743 void AdapterHandlerLibrary::print_handler_on(outputStream* st, CodeBlob* b) { |
|
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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()) ) { |
|
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2748 st->print("Adapter for signature: "); |
|
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2749 st->print_cr("%s i2c: " INTPTR_FORMAT " c2i: " INTPTR_FORMAT " c2iUV: " INTPTR_FORMAT, |
|
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|
2750 a->fingerprint()->as_string(), |
|
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|
2751 a->get_i2c_entry(), a->get_c2i_entry(), a->get_c2i_unverified_entry()); |
|
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2752 |
| 0 | 2753 return; |
| 2754 } | |
| 2755 } | |
| 2756 assert(false, "Should have found handler"); | |
| 2757 } | |
|
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2758 |
|
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2759 #ifndef PRODUCT |
|
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|
2760 |
|
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|
2761 void AdapterHandlerLibrary::print_statistics() { |
|
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|
2762 _adapters->print_statistics(); |
|
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|
2763 } |
|
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2764 |
| 0 | 2765 #endif /* PRODUCT */ |