Mercurial > hg > truffle
annotate src/share/vm/c1/c1_Runtime1.hpp @ 20543:e7d0505c8a30
8059758: Footprint regressions with JDK-8038423
Summary: Changes in JDK-8038423 always initialize (zero out) virtual memory used for auxiliary data structures. This causes a footprint regression for G1 in startup benchmarks. This is because they do not touch that memory at all, so the operating system does not actually commit these pages. The fix is to, if the initialization value of the data structures matches the default value of just committed memory (=0), do not do anything.
Reviewed-by: jwilhelm, brutisso
| author | tschatzl |
|---|---|
| date | Fri, 10 Oct 2014 15:51:58 +0200 |
| parents | 55fb97c4c58d |
| children | d8041d695d19 |
| rev | line source |
|---|---|
| 0 | 1 /* |
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2 * Copyright (c) 1999, 2013, Oracle and/or its affiliates. All rights reserved. |
| 0 | 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 * | |
| 5 * This code is free software; you can redistribute it and/or modify it | |
| 6 * under the terms of the GNU General Public License version 2 only, as | |
| 7 * published by the Free Software Foundation. | |
| 8 * | |
| 9 * This code is distributed in the hope that it will be useful, but WITHOUT | |
| 10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 12 * version 2 for more details (a copy is included in the LICENSE file that | |
| 13 * accompanied this code). | |
| 14 * | |
| 15 * You should have received a copy of the GNU General Public License version | |
| 16 * 2 along with this work; if not, write to the Free Software Foundation, | |
| 17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. | |
| 18 * | |
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19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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20 * or visit www.oracle.com if you need additional information or have any |
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21 * questions. |
| 0 | 22 * |
| 23 */ | |
| 24 | |
| 1972 | 25 #ifndef SHARE_VM_C1_C1_RUNTIME1_HPP |
| 26 #define SHARE_VM_C1_C1_RUNTIME1_HPP | |
| 27 | |
| 28 #include "c1/c1_FrameMap.hpp" | |
| 29 #include "code/stubs.hpp" | |
| 30 #include "interpreter/interpreter.hpp" | |
| 31 #include "memory/allocation.hpp" | |
| 32 #include "runtime/deoptimization.hpp" | |
| 33 | |
| 0 | 34 class StubAssembler; |
| 35 | |
| 36 // The Runtime1 holds all assembly stubs and VM | |
| 37 // runtime routines needed by code code generated | |
| 38 // by the Compiler1. | |
| 39 | |
| 40 #define RUNTIME1_STUBS(stub, last_entry) \ | |
| 41 stub(dtrace_object_alloc) \ | |
| 42 stub(unwind_exception) \ | |
| 43 stub(forward_exception) \ | |
| 44 stub(throw_range_check_failed) /* throws ArrayIndexOutOfBoundsException */ \ | |
| 45 stub(throw_index_exception) /* throws IndexOutOfBoundsException */ \ | |
| 46 stub(throw_div0_exception) \ | |
| 47 stub(throw_null_pointer_exception) \ | |
| 48 stub(register_finalizer) \ | |
| 49 stub(new_instance) \ | |
| 50 stub(fast_new_instance) \ | |
| 51 stub(fast_new_instance_init_check) \ | |
| 52 stub(new_type_array) \ | |
| 53 stub(new_object_array) \ | |
| 54 stub(new_multi_array) \ | |
| 55 stub(handle_exception_nofpu) /* optimized version that does not preserve fpu registers */ \ | |
| 56 stub(handle_exception) \ | |
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57 stub(handle_exception_from_callee) \ |
| 0 | 58 stub(throw_array_store_exception) \ |
| 59 stub(throw_class_cast_exception) \ | |
| 60 stub(throw_incompatible_class_change_error) \ | |
| 61 stub(slow_subtype_check) \ | |
| 62 stub(monitorenter) \ | |
| 63 stub(monitorenter_nofpu) /* optimized version that does not preserve fpu registers */ \ | |
| 64 stub(monitorexit) \ | |
| 65 stub(monitorexit_nofpu) /* optimized version that does not preserve fpu registers */ \ | |
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66 stub(deoptimize) \ |
| 0 | 67 stub(access_field_patching) \ |
| 68 stub(load_klass_patching) \ | |
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69 stub(load_mirror_patching) \ |
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70 stub(load_appendix_patching) \ |
| 342 | 71 stub(g1_pre_barrier_slow) \ |
| 72 stub(g1_post_barrier_slow) \ | |
| 0 | 73 stub(fpu2long_stub) \ |
| 74 stub(counter_overflow) \ | |
| 8860 | 75 stub(predicate_failed_trap) \ |
| 0 | 76 last_entry(number_of_ids) |
| 77 | |
| 78 #define DECLARE_STUB_ID(x) x ## _id , | |
| 79 #define DECLARE_LAST_STUB_ID(x) x | |
| 80 #define STUB_NAME(x) #x " Runtime1 stub", | |
| 81 #define LAST_STUB_NAME(x) #x " Runtime1 stub" | |
| 82 | |
| 83 class Runtime1: public AllStatic { | |
| 84 friend class VMStructs; | |
| 85 friend class ArrayCopyStub; | |
| 86 | |
| 87 public: | |
| 88 enum StubID { | |
| 89 RUNTIME1_STUBS(DECLARE_STUB_ID, DECLARE_LAST_STUB_ID) | |
| 90 }; | |
| 91 | |
| 92 // statistics | |
| 93 #ifndef PRODUCT | |
| 94 static int _resolve_invoke_cnt; | |
| 95 static int _handle_wrong_method_cnt; | |
| 96 static int _ic_miss_cnt; | |
| 97 static int _generic_arraycopy_cnt; | |
| 98 static int _primitive_arraycopy_cnt; | |
| 99 static int _oop_arraycopy_cnt; | |
| 2446 | 100 static int _generic_arraycopystub_cnt; |
| 0 | 101 static int _arraycopy_slowcase_cnt; |
| 2446 | 102 static int _arraycopy_checkcast_cnt; |
| 103 static int _arraycopy_checkcast_attempt_cnt; | |
| 0 | 104 static int _new_type_array_slowcase_cnt; |
| 105 static int _new_object_array_slowcase_cnt; | |
| 106 static int _new_instance_slowcase_cnt; | |
| 107 static int _new_multi_array_slowcase_cnt; | |
| 108 static int _monitorenter_slowcase_cnt; | |
| 109 static int _monitorexit_slowcase_cnt; | |
| 110 static int _patch_code_slowcase_cnt; | |
| 111 static int _throw_range_check_exception_count; | |
| 112 static int _throw_index_exception_count; | |
| 113 static int _throw_div0_exception_count; | |
| 114 static int _throw_null_pointer_exception_count; | |
| 115 static int _throw_class_cast_exception_count; | |
| 116 static int _throw_incompatible_class_change_error_count; | |
| 117 static int _throw_array_store_exception_count; | |
| 118 static int _throw_count; | |
| 119 #endif | |
| 120 | |
| 121 private: | |
| 122 static CodeBlob* _blobs[number_of_ids]; | |
| 123 static const char* _blob_names[]; | |
| 124 | |
| 125 // stub generation | |
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126 static void generate_blob_for(BufferBlob* blob, StubID id); |
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127 static OopMapSet* generate_code_for(StubID id, StubAssembler* sasm); |
| 0 | 128 static OopMapSet* generate_exception_throw(StubAssembler* sasm, address target, bool has_argument); |
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129 static OopMapSet* generate_handle_exception(StubID id, StubAssembler* sasm); |
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130 static void generate_unwind_exception(StubAssembler *sasm); |
| 0 | 131 static OopMapSet* generate_patching(StubAssembler* sasm, address target); |
| 132 | |
| 133 static OopMapSet* generate_stub_call(StubAssembler* sasm, Register result, address entry, | |
| 134 Register arg1 = noreg, Register arg2 = noreg, Register arg3 = noreg); | |
| 135 | |
| 136 // runtime entry points | |
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137 static void new_instance (JavaThread* thread, Klass* klass); |
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138 static void new_type_array (JavaThread* thread, Klass* klass, jint length); |
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139 static void new_object_array(JavaThread* thread, Klass* klass, jint length); |
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140 static void new_multi_array (JavaThread* thread, Klass* klass, int rank, jint* dims); |
| 0 | 141 |
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142 static address counter_overflow(JavaThread* thread, int bci, Method* method); |
| 0 | 143 |
| 144 static void unimplemented_entry (JavaThread* thread, StubID id); | |
| 145 | |
| 146 static address exception_handler_for_pc(JavaThread* thread); | |
| 147 | |
| 148 static void throw_range_check_exception(JavaThread* thread, int index); | |
| 149 static void throw_index_exception(JavaThread* thread, int index); | |
| 150 static void throw_div0_exception(JavaThread* thread); | |
| 151 static void throw_null_pointer_exception(JavaThread* thread); | |
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152 static void throw_class_cast_exception(JavaThread* thread, oopDesc* object); |
| 0 | 153 static void throw_incompatible_class_change_error(JavaThread* thread); |
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154 static void throw_array_store_exception(JavaThread* thread, oopDesc* object); |
| 0 | 155 |
| 156 static void monitorenter(JavaThread* thread, oopDesc* obj, BasicObjectLock* lock); | |
| 157 static void monitorexit (JavaThread* thread, BasicObjectLock* lock); | |
| 158 | |
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159 static void deoptimize(JavaThread* thread); |
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160 |
| 0 | 161 static int access_field_patching(JavaThread* thread); |
| 162 static int move_klass_patching(JavaThread* thread); | |
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163 static int move_mirror_patching(JavaThread* thread); |
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164 static int move_appendix_patching(JavaThread* thread); |
| 0 | 165 |
| 166 static void patch_code(JavaThread* thread, StubID stub_id); | |
| 167 | |
| 168 public: | |
| 169 // initialization | |
| 1584 | 170 static void initialize(BufferBlob* blob); |
| 0 | 171 static void initialize_pd(); |
| 172 | |
| 173 // stubs | |
| 174 static CodeBlob* blob_for (StubID id); | |
| 1748 | 175 static address entry_for(StubID id) { return blob_for(id)->code_begin(); } |
| 0 | 176 static const char* name_for (StubID id); |
| 177 static const char* name_for_address(address entry); | |
| 178 | |
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179 // platform might add runtime names. |
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180 static const char* pd_name_for_address(address entry); |
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181 |
| 0 | 182 // method tracing |
| 183 static void trace_block_entry(jint block_id); | |
| 184 | |
| 185 #ifndef PRODUCT | |
| 2446 | 186 static address throw_count_address() { return (address)&_throw_count; } |
| 187 static address arraycopy_count_address(BasicType type); | |
| 0 | 188 #endif |
| 189 | |
| 190 // directly accessible leaf routine | |
| 191 static int arraycopy(oopDesc* src, int src_pos, oopDesc* dst, int dst_pos, int length); | |
| 192 static void primitive_arraycopy(HeapWord* src, HeapWord* dst, int length); | |
| 193 static void oop_arraycopy(HeapWord* src, HeapWord* dst, int length); | |
| 6135 | 194 static int is_instance_of(oopDesc* mirror, oopDesc* obj); |
| 0 | 195 |
| 8860 | 196 static void predicate_failed_trap(JavaThread* thread); |
| 197 | |
| 0 | 198 static void print_statistics() PRODUCT_RETURN; |
| 199 }; | |
| 1972 | 200 |
| 201 #endif // SHARE_VM_C1_C1_RUNTIME1_HPP |