Mercurial > hg > graal-compiler
annotate src/share/vm/runtime/vmStructs.hpp @ 1552:c18cbe5936b8
6941466: Oracle rebranding changes for Hotspot repositories
Summary: Change all the Sun copyrights to Oracle copyright
Reviewed-by: ohair
| author | trims |
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| date | Thu, 27 May 2010 19:08:38 -0700 |
| parents | a61af66fc99e |
| children | f95d63e2154a |
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| 0 | 1 /* |
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2 * Copyright (c) 2000, 2001, 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 // This table encapsulates the debugging information required by the | |
| 26 // serviceability agent in order to run. Specifically, we need to | |
| 27 // understand the layout of certain C data structures (offsets, in | |
| 28 // bytes, of their fields.) | |
| 29 // | |
| 30 // There are alternatives for the design of this mechanism, including | |
| 31 // parsing platform-specific debugging symbols from a debug build into | |
| 32 // a program database. While this current mechanism can be considered | |
| 33 // to be a workaround for the inability to debug arbitrary C and C++ | |
| 34 // programs at the present time, it does have certain advantages. | |
| 35 // First, it is platform-independent, which will vastly simplify the | |
| 36 // initial bringup of the system both now and on future platforms. | |
| 37 // Second, it is embedded within the VM, as opposed to being in a | |
| 38 // separate program database; experience has shown that whenever | |
| 39 // portions of a system are decoupled, version skew is problematic. | |
| 40 // Third, generating a program database, for example for a product | |
| 41 // build, would probably require two builds to be done: the desired | |
| 42 // product build as well as an intermediary build with the PRODUCT | |
| 43 // flag turned on but also compiled with -g, leading to a doubling of | |
| 44 // the time required to get a serviceability agent-debuggable product | |
| 45 // build. Fourth, and very significantly, this table probably | |
| 46 // preserves more information about field types than stabs do; for | |
| 47 // example, it preserves the fact that a field is a "jlong" rather | |
| 48 // than transforming the type according to the typedef in jni_md.h, | |
| 49 // which allows the Java-side code to identify "Java-sized" fields in | |
| 50 // C++ data structures. If the symbol parsing mechanism was redone | |
| 51 // using stabs, it might still be necessary to have a table somewhere | |
| 52 // containing this information. | |
| 53 // | |
| 54 // Do not change the sizes or signedness of the integer values in | |
| 55 // these data structures; they are fixed over in the serviceability | |
| 56 // agent's Java code (for bootstrapping). | |
| 57 | |
| 58 typedef struct { | |
| 59 const char* typeName; // The type name containing the given field (example: "Klass") | |
| 60 const char* fieldName; // The field name within the type (example: "_name") | |
| 61 const char* typeString; // Quoted name of the type of this field (example: "symbolOopDesc*"; | |
| 62 // parsed in Java to ensure type correctness | |
| 63 int32_t isStatic; // Indicates whether following field is an offset or an address | |
| 64 uint64_t offset; // Offset of field within structure; only used for nonstatic fields | |
| 65 void* address; // Address of field; only used for static fields | |
| 66 // ("offset" can not be reused because of apparent SparcWorks compiler bug | |
| 67 // in generation of initializer data) | |
| 68 } VMStructEntry; | |
| 69 | |
| 70 typedef struct { | |
| 71 const char* typeName; // Type name (example: "methodOopDesc") | |
| 72 const char* superclassName; // Superclass name, or null if none (example: "oopDesc") | |
| 73 int32_t isOopType; // Does this type represent an oop typedef? (i.e., "methodOop" or | |
| 74 // "klassOop", but NOT "methodOopDesc") | |
| 75 int32_t isIntegerType; // Does this type represent an integer type (of arbitrary size)? | |
| 76 int32_t isUnsigned; // If so, is it unsigned? | |
| 77 uint64_t size; // Size, in bytes, of the type | |
| 78 } VMTypeEntry; | |
| 79 | |
| 80 typedef struct { | |
| 81 const char* name; // Name of constant (example: "_thread_in_native") | |
| 82 int32_t value; // Value of constant | |
| 83 } VMIntConstantEntry; | |
| 84 | |
| 85 typedef struct { | |
| 86 const char* name; // Name of constant (example: "_thread_in_native") | |
| 87 uint64_t value; // Value of constant | |
| 88 } VMLongConstantEntry; | |
| 89 | |
| 90 // This class is a friend of most classes, to be able to access | |
| 91 // private fields | |
| 92 class VMStructs { | |
| 93 public: | |
| 94 // The last entry is identified over in the serviceability agent by | |
| 95 // the fact that it has a NULL fieldName | |
| 96 static VMStructEntry localHotSpotVMStructs[]; | |
| 97 | |
| 98 // The last entry is identified over in the serviceability agent by | |
| 99 // the fact that it has a NULL typeName | |
| 100 static VMTypeEntry localHotSpotVMTypes[]; | |
| 101 | |
| 102 // Table of integer constants required by the serviceability agent. | |
| 103 // The last entry is identified over in the serviceability agent by | |
| 104 // the fact that it has a NULL typeName | |
| 105 static VMIntConstantEntry localHotSpotVMIntConstants[]; | |
| 106 | |
| 107 // Table of long constants required by the serviceability agent. | |
| 108 // The last entry is identified over in the serviceability agent by | |
| 109 // the fact that it has a NULL typeName | |
| 110 static VMLongConstantEntry localHotSpotVMLongConstants[]; | |
| 111 | |
| 112 // This is used to run any checking code necessary for validation of | |
| 113 // the data structure (debug build only) | |
| 114 static void init(); | |
| 115 | |
| 116 private: | |
| 117 // Look up a type in localHotSpotVMTypes using strcmp() (debug build only). | |
| 118 // Returns 1 if found, 0 if not. | |
| 119 // debug_only(static int findType(const char* typeName);) | |
| 120 static int findType(const char* typeName); | |
| 121 }; |