Quelle jvmticmlr.h Sprache: C

/*
* Copyright (c) 2010, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.  Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/

/*
* This header file defines the data structures sent by the VM
* through the JVMTI CompiledMethodLoad callback function via the
* "void * compile_info" parameter. The memory pointed to by the
* compile_info parameter may not be referenced after returning from
* the CompiledMethodLoad callback. These are VM implementation
* specific data structures that may evolve in future releases. A
* JVMTI agent should interpret a non-NULL compile_info as a pointer
* to a region of memory containing a list of records. In a typical
* usage scenario, a JVMTI agent would cast each record to a
* jvmtiCompiledMethodLoadRecordHeader, a struct that represents
* arbitrary information. This struct contains a kind field to indicate
* the kind of information being passed, and a pointer to the next
* record. If the kind field indicates inlining information, then the
* agent would cast the record to a jvmtiCompiledMethodLoadInlineRecord.
* This record contains an array of PCStackInfo structs, which indicate
* for every pc address what are the methods on the invocation stack.
* The "methods" and "bcis" fields in each PCStackInfo struct specify a
* 1-1 mapping between these inlined methods and their bytecode indices.
* This can be used to derive the proper source lines of the inlined
* methods.
*/

#ifndef _JVMTI_CMLR_H_
#define _JVMTI_CMLR_H_

enum {
    JVMTI_CMLR_MAJOR_VERSION_1 = 0x00000001,
    JVMTI_CMLR_MINOR_VERSION_0 = 0x00000000,

    JVMTI_CMLR_MAJOR_VERSION   = 0x00000001,
    JVMTI_CMLR_MINOR_VERSION   = 0x00000000

    /*
     * This comment is for the "JDK import from HotSpot" sanity check:
     * version: 1.0.0
     */
};

typedef enum {
    JVMTI_CMLR_DUMMY       = 1,
    JVMTI_CMLR_INLINE_INFO = 2
} jvmtiCMLRKind;

/*
* Record that represents arbitrary information passed through JVMTI
* CompiledMethodLoadEvent void pointer.
*/
typedef struct _jvmtiCompiledMethodLoadRecordHeader {
  jvmtiCMLRKind kind;     /* id for the kind of info passed in the record */
  jint majorinfoversion;  /* major and minor info version values. Init'ed */
  jint minorinfoversion;  /* to current version value in jvmtiExport.cpp. */

  struct _jvmtiCompiledMethodLoadRecordHeader* next;
} jvmtiCompiledMethodLoadRecordHeader;

/*
* Record that gives information about the methods on the compile-time
* stack at a specific pc address of a compiled method. Each element in
* the methods array maps to same element in the bcis array.
*/
typedef struct _PCStackInfo {
  void* pc;             /* the pc address for this compiled method */
  jint numstackframes;  /* number of methods on the stack */
  jmethodID* methods;   /* array of numstackframes method ids */
  jint* bcis;           /* array of numstackframes bytecode indices */
} PCStackInfo;

/*
* Record that contains inlining information for each pc address of
* an nmethod.
*/
typedef struct _jvmtiCompiledMethodLoadInlineRecord {
  jvmtiCompiledMethodLoadRecordHeader header;  /* common header for casting */
  jint numpcs;          /* number of pc descriptors in this nmethod */
  PCStackInfo* pcinfo;  /* array of numpcs pc descriptors */
} jvmtiCompiledMethodLoadInlineRecord;

/*
* Dummy record used to test that we can pass records with different
* information through the void pointer provided that they can be cast
* to a jvmtiCompiledMethodLoadRecordHeader.
*/

typedef struct _jvmtiCompiledMethodLoadDummyRecord {
  jvmtiCompiledMethodLoadRecordHeader header;  /* common header for casting */
  char message[50];
} jvmtiCompiledMethodLoadDummyRecord;

#endif

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