1 /*
2 * Copyright 2010 Sun Microsystems, Inc. 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. Sun designates this
8 * particular file as subject to the "Classpath" exception as provided
9 * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
22 * CA 95054 USA or visit www.sun.com if you need additional information or
23 * have any 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