Mercurial > jdk8-mips64-public > hotspot / annotate
src/share/vm/prims/jvmtiCodeBlobEvents.hpp@4c84d351cca9 (annotated)
src/share/vm/prims/jvmtiCodeBlobEvents.hpp
Fri, 16 Aug 2013 13:22:32 +0200
- author
- stefank
- date
- Fri, 16 Aug 2013 13:22:32 +0200
- changeset 5578
- 4c84d351cca9
- parent 4492
- 8b46b0196eb0
- child 6876
- 710a3c8b516e
- permissions
- -rw-r--r--
8007074: SIGSEGV at ParMarkBitMap::verify_clear()
Summary: Replace the broken large pages implementation on Linux. New flag: -XX:+UseTransparentHugePages - Linux specific flag to turn on transparent huge page hinting with madvise(..., MAP_HUGETLB). Changed behavior: -XX:+UseLargePages - tries to use -XX:+UseTransparentHugePages before trying other large pages implementations (on Linux). Changed behavior: -XX:+UseHugeTLBFS - Use upfront allocation of Large Pages instead of using the broken implementation to dynamically committing large pages. Changed behavior: -XX:LargePageSizeInBytes - Turned off the ability to use this flag on Linux and provides warning to user if set to a value different than the OS chosen large page size. Changed behavior: Setting no large page size - Now defaults to use -XX:UseTransparentHugePages if the OS supports it. Previously, -XX:+UseHugeTLBFS was chosen if the OS was configured to use large pages.
Reviewed-by: tschatzl, dcubed, brutisso
| duke@435 | 1 | /* |
| zgu@4492 | 2 | * Copyright (c) 2003, 2013, Oracle and/or its affiliates. All rights reserved. |
| duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| duke@435 | 4 | * |
| duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
| duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| duke@435 | 7 | * published by the Free Software Foundation. |
| duke@435 | 8 | * |
| duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| duke@435 | 13 | * accompanied this code). |
| duke@435 | 14 | * |
| duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
| duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| duke@435 | 18 | * |
| trims@1907 | 19 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| trims@1907 | 20 | * or visit www.oracle.com if you need additional information or have any |
| trims@1907 | 21 | * questions. |
| duke@435 | 22 | * |
| duke@435 | 23 | */ |
| duke@435 | 24 | |
| stefank@2314 | 25 | #ifndef SHARE_VM_PRIMS_JVMTICODEBLOBEVENTS_HPP |
| stefank@2314 | 26 | #define SHARE_VM_PRIMS_JVMTICODEBLOBEVENTS_HPP |
| stefank@2314 | 27 | |
| stefank@2314 | 28 | #include "jvmtifiles/jvmti.h" |
| duke@435 | 29 | |
| duke@435 | 30 | // forward declaration |
| duke@435 | 31 | class JvmtiEnv; |
| duke@435 | 32 | |
| duke@435 | 33 | |
| duke@435 | 34 | // JVMTI code blob event support |
| duke@435 | 35 | // -- used by GenerateEvents to generate CompiledMethodLoad and |
| duke@435 | 36 | // DynamicCodeGenerated events |
| duke@435 | 37 | // -- also provide utility function build_jvmti_addr_location_map to create |
| duke@435 | 38 | // a jvmtiAddrLocationMap list for a nmethod. |
| duke@435 | 39 | |
| duke@435 | 40 | class JvmtiCodeBlobEvents : public AllStatic { |
| duke@435 | 41 | public: |
| duke@435 | 42 | |
| duke@435 | 43 | // generate a DYNAMIC_CODE_GENERATED_EVENT event for each non-nmethod |
| duke@435 | 44 | // code blob in the code cache. |
| duke@435 | 45 | static jvmtiError generate_dynamic_code_events(JvmtiEnv* env); |
| duke@435 | 46 | |
| duke@435 | 47 | // generate a COMPILED_METHOD_LOAD event for each nmethod |
| duke@435 | 48 | // code blob in the code cache. |
| duke@435 | 49 | static jvmtiError generate_compiled_method_load_events(JvmtiEnv* env); |
| duke@435 | 50 | |
| duke@435 | 51 | // create a C-heap allocated address location map for an nmethod |
| duke@435 | 52 | static void build_jvmti_addr_location_map(nmethod *nm, jvmtiAddrLocationMap** map, |
| duke@435 | 53 | jint *map_length); |
| duke@435 | 54 | }; |
| duke@435 | 55 | |
| stefank@2314 | 56 | #endif // SHARE_VM_PRIMS_JVMTICODEBLOBEVENTS_HPP |
