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comparison src/share/vm/c1/c1_CodeStubs.hpp @ 6725:da91efe96a93

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6964458: Reimplement class meta-data storage to use native memory Summary: Remove PermGen, allocate meta-data in metaspace linked to class loaders, rewrite GC walking, rewrite and rename metadata to be C++ classes Reviewed-by: jmasa, stefank, never, coleenp, kvn, brutisso, mgerdin, dholmes, jrose, twisti, roland Contributed-by: jmasa <jon.masamitsu@oracle.com>, stefank <stefan.karlsson@oracle.com>, mgerdin <mikael.gerdin@oracle.com>, never <tom.rodriguez@oracle.com>
author coleenp
date Sat, 01 Sep 2012 13:25:18 -0400
parents 09aad8452938
children db9981fd3124
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6724:36d1d483d5d6 6725:da91efe96a93
1 /* 1 /*
2 * Copyright (c) 1999, 2011, Oracle and/or its affiliates. All rights reserved. 2 * Copyright (c) 1999, 2012, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. 3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 * 4 *
5 * This code is free software; you can redistribute it and/or modify it 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 6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation. 7 * published by the Free Software Foundation.
344 344
345 class PatchingStub: public CodeStub { 345 class PatchingStub: public CodeStub {
346 public: 346 public:
347 enum PatchID { 347 enum PatchID {
348 access_field_id, 348 access_field_id,
349 load_klass_id 349 load_klass_id,
350 load_mirror_id
350 }; 351 };
351 enum constants { 352 enum constants {
352 patch_info_size = 3 353 patch_info_size = 3
353 }; 354 };
354 private: 355 private:
358 Label _patched_code_entry; 359 Label _patched_code_entry;
359 Label _patch_site_entry; 360 Label _patch_site_entry;
360 Label _patch_site_continuation; 361 Label _patch_site_continuation;
361 Register _obj; 362 Register _obj;
362 CodeEmitInfo* _info; 363 CodeEmitInfo* _info;
363 int _oop_index; // index of the patchable oop in nmethod oop table if needed 364 int _index; // index of the patchable oop or Klass* in nmethod oop or metadata table if needed
364 static int _patch_info_offset; 365 static int _patch_info_offset;
365 366
366 void align_patch_site(MacroAssembler* masm); 367 void align_patch_site(MacroAssembler* masm);
367 368
368 public: 369 public:
369 static int patch_info_offset() { return _patch_info_offset; } 370 static int patch_info_offset() { return _patch_info_offset; }
370 371
371 PatchingStub(MacroAssembler* masm, PatchID id, int oop_index = -1): 372 PatchingStub(MacroAssembler* masm, PatchID id, int index = -1):
372 _id(id) 373 _id(id)
373 , _info(NULL) 374 , _info(NULL)
374 , _oop_index(oop_index) { 375 , _index(index) {
375 if (os::is_MP()) { 376 if (os::is_MP()) {
376 // force alignment of patch sites on MP hardware so we 377 // force alignment of patch sites on MP hardware so we
377 // can guarantee atomic writes to the patch site. 378 // can guarantee atomic writes to the patch site.
378 align_patch_site(masm); 379 align_patch_site(masm);
379 } 380 }
397 case lir_patch_normal: field_offset = 0; break; 398 case lir_patch_normal: field_offset = 0; break;
398 default: ShouldNotReachHere(); 399 default: ShouldNotReachHere();
399 } 400 }
400 NativeMovRegMem* n_move = nativeMovRegMem_at(pc_start()); 401 NativeMovRegMem* n_move = nativeMovRegMem_at(pc_start());
401 n_move->set_offset(field_offset); 402 n_move->set_offset(field_offset);
402 } else if (_id == load_klass_id) { 403 } else if (_id == load_klass_id || _id == load_mirror_id) {
403 assert(_obj != noreg, "must have register object for load_klass"); 404 assert(_obj != noreg, "must have register object for load_klass/load_mirror");
404 #ifdef ASSERT 405 #ifdef ASSERT
405 // verify that we're pointing at a NativeMovConstReg 406 // verify that we're pointing at a NativeMovConstReg
406 nativeMovConstReg_at(pc_start()); 407 nativeMovConstReg_at(pc_start());
407 #endif 408 #endif
408 } else { 409 } else {