--- /dev/null Thu Jan 7 14:58:20 2010 +++ new/hotspot/src/share/vm/code/jvmticmlr.h Thu Jan 7 14:58:20 2010 @@ -0,0 +1,115 @@ +/* + * Copyright 2010 Sun Microsystems, Inc. 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. Sun designates this + * particular file as subject to the "Classpath" exception as provided + * by Sun 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.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