1 /* 2 * Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved. 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. Oracle designates this 8 * particular file as subject to the "Classpath" exception as provided 9 * by Oracle in the LICENSE file that accompanied this code. 10 * 11 * This code is distributed in the hope that it will be useful, but WITHOUT 12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License 14 * version 2 for more details (a copy is included in the LICENSE file that 15 * accompanied this code). 16 * 17 * You should have received a copy of the GNU General Public License version 18 * 2 along with this work; if not, write to the Free Software Foundation, 19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. 20 * 21 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA 22 * or visit www.oracle.com if you need additional information or have any 23 * questions. 24 */ 25 26 /* 27 * This header file defines the data structures sent by the VM 28 * through the JVMTI CompiledMethodLoad callback function via the 29 * "void * compile_info" parameter. The memory pointed to by the 30 * compile_info parameter may not be referenced after returning from 31 * the CompiledMethodLoad callback. These are VM implementation 32 * specific data structures that may evolve in future releases. A 33 * JVMTI agent should interpret a non-NULL compile_info as a pointer 34 * to a region of memory containing a list of records. In a typical 35 * usage scenario, a JVMTI agent would cast each record to a 36 * jvmtiCompiledMethodLoadRecordHeader, a struct that represents 37 * arbitrary information. This struct contains a kind field to indicate 38 * the kind of information being passed, and a pointer to the next 39 * record. If the kind field indicates inlining information, then the 40 * agent would cast the record to a jvmtiCompiledMethodLoadInlineRecord. 41 * This record contains an array of PCStackInfo structs, which indicate 42 * for every pc address what are the methods on the invocation stack. 43 * The "methods" and "bcis" fields in each PCStackInfo struct specify a 44 * 1-1 mapping between these inlined methods and their bytecode indices. 45 * This can be used to derive the proper source lines of the inlined 46 * methods. 47 */ 48 49 #ifndef _JVMTI_CMLR_H_ 50 #define _JVMTI_CMLR_H_ 51 52 enum { 53 JVMTI_CMLR_MAJOR_VERSION_1 = 0x00000001, 54 JVMTI_CMLR_MINOR_VERSION_0 = 0x00000000, 55 56 JVMTI_CMLR_MAJOR_VERSION = 0x00000001, 57 JVMTI_CMLR_MINOR_VERSION = 0x00000000 58 59 /* 60 * This comment is for the "JDK import from HotSpot" sanity check: 61 * version: 1.0.0 62 */ 63 }; 64 65 typedef enum { 66 JVMTI_CMLR_DUMMY = 1, 67 JVMTI_CMLR_INLINE_INFO = 2 68 } jvmtiCMLRKind; 69 70 /* 71 * Record that represents arbitrary information passed through JVMTI 72 * CompiledMethodLoadEvent void pointer. 73 */ 74 typedef struct _jvmtiCompiledMethodLoadRecordHeader { 75 jvmtiCMLRKind kind; /* id for the kind of info passed in the record */ 76 jint majorinfoversion; /* major and minor info version values. Init'ed */ 77 jint minorinfoversion; /* to current version value in jvmtiExport.cpp. */ 78 79 struct _jvmtiCompiledMethodLoadRecordHeader* next; 80 } jvmtiCompiledMethodLoadRecordHeader; 81 82 /* 83 * Record that gives information about the methods on the compile-time 84 * stack at a specific pc address of a compiled method. Each element in 85 * the methods array maps to same element in the bcis array. 86 */ 87 typedef struct _PCStackInfo { 88 void* pc; /* the pc address for this compiled method */ 89 jint numstackframes; /* number of methods on the stack */ 90 jmethodID* methods; /* array of numstackframes method ids */ 91 jint* bcis; /* array of numstackframes bytecode indices */ 92 } PCStackInfo; 93 94 /* 95 * Record that contains inlining information for each pc address of 96 * an nmethod. 97 */ 98 typedef struct _jvmtiCompiledMethodLoadInlineRecord { 99 jvmtiCompiledMethodLoadRecordHeader header; /* common header for casting */ 100 jint numpcs; /* number of pc descriptors in this nmethod */ 101 PCStackInfo* pcinfo; /* array of numpcs pc descriptors */ 102 } jvmtiCompiledMethodLoadInlineRecord; 103 104 /* 105 * Dummy record used to test that we can pass records with different 106 * information through the void pointer provided that they can be cast 107 * to a jvmtiCompiledMethodLoadRecordHeader. 108 */ 109 110 typedef struct _jvmtiCompiledMethodLoadDummyRecord { 111 jvmtiCompiledMethodLoadRecordHeader header; /* common header for casting */ 112 char message[50]; 113 } jvmtiCompiledMethodLoadDummyRecord; 114 115 #endif 116
