| 1 | /*
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| 2 | * Copyright (c) 1998, 2005, Oracle and/or its affiliates. All rights reserved.
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| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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| 4 | *
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| 5 | * This code is free software; you can redistribute it and/or modify it
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| 6 | * under the terms of the GNU General Public License version 2 only, as
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| 7 | * published by the Free Software Foundation. Oracle designates this
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| 8 | * particular file as subject to the "Classpath" exception as provided
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| 9 | * by Oracle in the LICENSE file that accompanied this code.
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| 10 | *
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| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT
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| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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| 14 | * version 2 for more details (a copy is included in the LICENSE file that
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| 15 | * accompanied this code).
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| 16 | *
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| 17 | * You should have received a copy of the GNU General Public License version
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| 18 | * 2 along with this work; if not, write to the Free Software Foundation,
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| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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| 20 | *
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| 21 | * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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| 22 | * or visit www.oracle.com if you need additional information or have any
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| 23 | * questions.
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| 24 | */
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| 25 |
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| 26 | #ifndef JDWP_UTIL_H
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| 27 | #define JDWP_UTIL_H
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| 28 |
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| 29 | #include <stddef.h>
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| 30 | #include <stdio.h>
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| 31 | #include <string.h>
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| 32 | #include <stdlib.h>
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| 33 | #include <stdarg.h>
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| 34 |
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| 35 | #ifdef DEBUG
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| 36 | /* Just to make sure these interfaces are not used here. */
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| 37 | #undef free
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| 38 | #define free(p) Do not use this interface.
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| 39 | #undef malloc
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| 40 | #define malloc(p) Do not use this interface.
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| 41 | #undef calloc
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| 42 | #define calloc(p) Do not use this interface.
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| 43 | #undef realloc
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| 44 | #define realloc(p) Do not use this interface.
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| 45 | #undef strdup
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| 46 | #define strdup(p) Do not use this interface.
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| 47 | #endif
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| 48 |
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| 49 | #include "log_messages.h"
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| 50 | #include "vm_interface.h"
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| 51 | #include "JDWP.h"
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| 52 | #include "util_md.h"
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| 53 | #include "error_messages.h"
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| 54 | #include "debugInit.h"
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| 55 |
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| 56 | /* Get access to Native Platform Toolkit functions */
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| 57 | #include "npt.h"
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| 58 |
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| 59 | /* Definition of a CommonRef tracked by the backend for the frontend */
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| 60 | typedef struct RefNode {
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| 61 | jlong seqNum; /* ID of reference, also key for hash table */
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| 62 | jobject ref; /* could be strong or weak */
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| 63 | struct RefNode *next; /* next RefNode* in bucket chain */
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| 64 | jint count; /* count of references */
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| 65 | unsigned isStrong : 1; /* 1 means this is a string reference */
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| 66 | } RefNode;
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| 67 |
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| 68 | /* Value of a NULL ID */
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| 69 | #define NULL_OBJECT_ID ((jlong)0)
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| 70 |
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| 71 | /*
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| 72 | * Globals used throughout the back end
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| 73 | */
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| 74 |
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| 75 | typedef jint FrameNumber;
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| 76 |
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| 77 | typedef struct {
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| 78 | jvmtiEnv *jvmti;
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| 79 | JavaVM *jvm;
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| 80 | volatile jboolean vmDead; /* Once VM is dead it stays that way - don't put in init */
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| 81 | jboolean assertOn;
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| 82 | jboolean assertFatal;
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| 83 | jboolean doerrorexit;
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| 84 | jboolean modifiedUtf8;
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| 85 | jboolean quiet;
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| 86 |
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| 87 | /* Debug flags (bit mask) */
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| 88 | int debugflags;
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| 89 |
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| 90 | /* Possible debug flags */
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| 91 | #define USE_ITERATE_THROUGH_HEAP 0X001
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| 92 |
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| 93 | char * options;
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| 94 |
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| 95 | jclass classClass;
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| 96 | jclass threadClass;
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| 97 | jclass threadGroupClass;
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| 98 | jclass classLoaderClass;
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| 99 | jclass stringClass;
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| 100 | jclass systemClass;
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| 101 | jmethodID threadConstructor;
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| 102 | jmethodID threadSetDaemon;
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| 103 | jmethodID threadResume;
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| 104 | jmethodID systemGetProperty;
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| 105 | jmethodID setProperty;
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| 106 | jthreadGroup systemThreadGroup;
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| 107 | jobject agent_properties;
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| 108 |
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| 109 | jint cachedJvmtiVersion;
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| 110 | jvmtiCapabilities cachedJvmtiCapabilities;
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| 111 | jboolean haveCachedJvmtiCapabilities;
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| 112 | jvmtiEventCallbacks callbacks;
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| 113 |
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| 114 | /* Various property values we should grab on initialization */
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| 115 | char* property_java_version; /* UTF8 java.version */
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| 116 | char* property_java_vm_name; /* UTF8 java.vm.name */
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| 117 | char* property_java_vm_info; /* UTF8 java.vm.info */
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| 118 | char* property_java_class_path; /* UTF8 java.class.path */
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| 119 | char* property_sun_boot_class_path; /* UTF8 sun.boot.class.path */
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| 120 | char* property_sun_boot_library_path; /* UTF8 sun.boot.library.path */
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| 121 | char* property_path_separator; /* UTF8 path.separator */
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| 122 | char* property_user_dir; /* UTF8 user.dir */
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| 123 |
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| 124 | unsigned log_flags;
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| 125 |
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| 126 | /* The Native Platform Toolkit access */
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| 127 | NptEnv *npt;
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| 128 |
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| 129 | /* Common References static data */
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| 130 | jrawMonitorID refLock;
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| 131 | jlong nextSeqNum;
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| 132 | RefNode **objectsByID;
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| 133 | int objectsByIDsize;
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| 134 | int objectsByIDcount;
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| 135 |
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| 136 | /* Indication that the agent has been loaded */
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| 137 | jboolean isLoaded;
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| 138 |
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| 139 | } BackendGlobalData;
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| 140 |
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| 141 | extern BackendGlobalData * gdata;
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| 142 |
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| 143 | /*
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| 144 | * Event Index for handlers
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| 145 | */
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| 146 |
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| 147 | typedef enum {
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| 148 | EI_min = 1,
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| 149 |
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| 150 | EI_SINGLE_STEP = 1,
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| 151 | EI_BREAKPOINT = 2,
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| 152 | EI_FRAME_POP = 3,
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| 153 | EI_EXCEPTION = 4,
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| 154 | EI_THREAD_START = 5,
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| 155 | EI_THREAD_END = 6,
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| 156 | EI_CLASS_PREPARE = 7,
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| 157 | EI_GC_FINISH = 8,
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| 158 | EI_CLASS_LOAD = 9,
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| 159 | EI_FIELD_ACCESS = 10,
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| 160 | EI_FIELD_MODIFICATION = 11,
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| 161 | EI_EXCEPTION_CATCH = 12,
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| 162 | EI_METHOD_ENTRY = 13,
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| 163 | EI_METHOD_EXIT = 14,
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| 164 | EI_MONITOR_CONTENDED_ENTER = 15,
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| 165 | EI_MONITOR_CONTENDED_ENTERED = 16,
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| 166 | EI_MONITOR_WAIT = 17,
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| 167 | EI_MONITOR_WAITED = 18,
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| 168 | EI_VM_INIT = 19,
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| 169 | EI_VM_DEATH = 20,
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| 170 | EI_max = 20
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| 171 | } EventIndex;
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| 172 |
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| 173 | /* Agent errors that might be in a jvmtiError for JDWP or internal.
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| 174 | * (Done this way so that compiler allows it's use as a jvmtiError)
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| 175 | */
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| 176 | #define _AGENT_ERROR(x) ((jvmtiError)(JVMTI_ERROR_MAX+64+x))
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| 177 | #define AGENT_ERROR_INTERNAL _AGENT_ERROR(1)
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| 178 | #define AGENT_ERROR_VM_DEAD _AGENT_ERROR(2)
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| 179 | #define AGENT_ERROR_NO_JNI_ENV _AGENT_ERROR(3)
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| 180 | #define AGENT_ERROR_JNI_EXCEPTION _AGENT_ERROR(4)
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| 181 | #define AGENT_ERROR_JVMTI_INTERNAL _AGENT_ERROR(5)
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| 182 | #define AGENT_ERROR_JDWP_INTERNAL _AGENT_ERROR(6)
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| 183 | #define AGENT_ERROR_NOT_CURRENT_FRAME _AGENT_ERROR(7)
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| 184 | #define AGENT_ERROR_OUT_OF_MEMORY _AGENT_ERROR(8)
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| 185 | #define AGENT_ERROR_INVALID_TAG _AGENT_ERROR(9)
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| 186 | #define AGENT_ERROR_ALREADY_INVOKING _AGENT_ERROR(10)
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| 187 | #define AGENT_ERROR_INVALID_INDEX _AGENT_ERROR(11)
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| 188 | #define AGENT_ERROR_INVALID_LENGTH _AGENT_ERROR(12)
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| 189 | #define AGENT_ERROR_INVALID_STRING _AGENT_ERROR(13)
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| 190 | #define AGENT_ERROR_INVALID_CLASS_LOADER _AGENT_ERROR(14)
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| 191 | #define AGENT_ERROR_INVALID_ARRAY _AGENT_ERROR(15)
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| 192 | #define AGENT_ERROR_TRANSPORT_LOAD _AGENT_ERROR(16)
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| 193 | #define AGENT_ERROR_TRANSPORT_INIT _AGENT_ERROR(17)
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| 194 | #define AGENT_ERROR_NATIVE_METHOD _AGENT_ERROR(18)
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| 195 | #define AGENT_ERROR_INVALID_COUNT _AGENT_ERROR(19)
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| 196 | #define AGENT_ERROR_INVALID_FRAMEID _AGENT_ERROR(20)
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| 197 | #define AGENT_ERROR_NULL_POINTER _AGENT_ERROR(21)
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| 198 | #define AGENT_ERROR_ILLEGAL_ARGUMENT _AGENT_ERROR(22)
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| 199 | #define AGENT_ERROR_INVALID_THREAD _AGENT_ERROR(23)
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| 200 | #define AGENT_ERROR_INVALID_EVENT_TYPE _AGENT_ERROR(24)
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| 201 | #define AGENT_ERROR_INVALID_OBJECT _AGENT_ERROR(25)
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| 202 | #define AGENT_ERROR_NO_MORE_FRAMES _AGENT_ERROR(26)
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| 203 |
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| 204 | /* Combined event information */
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| 205 |
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| 206 | typedef struct {
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| 207 |
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| 208 | EventIndex ei;
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| 209 | jthread thread;
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| 210 | jclass clazz;
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| 211 | jmethodID method;
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| 212 | jlocation location;
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| 213 | jobject object; /* possibly an exception or user object */
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| 214 |
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| 215 | union {
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| 216 |
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| 217 | /* ei = EI_FIELD_ACCESS */
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| 218 | struct {
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| 219 | jclass field_clazz;
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| 220 | jfieldID field;
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| 221 | } field_access;
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| 222 |
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| 223 | /* ei = EI_FIELD_MODIFICATION */
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| 224 | struct {
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| 225 | jclass field_clazz;
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| 226 | jfieldID field;
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| 227 | char signature_type;
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| 228 | jvalue new_value;
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| 229 | } field_modification;
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| 230 |
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| 231 | /* ei = EI_EXCEPTION */
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| 232 | struct {
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| 233 | jclass catch_clazz;
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| 234 | jmethodID catch_method;
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| 235 | jlocation catch_location;
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| 236 | } exception;
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| 237 |
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| 238 | /* ei = EI_METHOD_EXIT */
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| 239 | struct {
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| 240 | jvalue return_value;
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| 241 | } method_exit;
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| 242 |
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| 243 | /* For monitor wait events */
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| 244 | union {
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| 245 | /* ei = EI_MONITOR_WAIT */
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| 246 | jlong timeout;
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| 247 | /* ei = EI_MONITOR_WAITED */
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| 248 | jboolean timed_out;
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| 249 | } monitor;
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| 250 | } u;
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| 251 |
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| 252 | } EventInfo;
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| 253 |
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| 254 | /* Structure to hold dynamic array of objects */
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| 255 | typedef struct ObjectBatch {
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| 256 | jobject *objects;
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| 257 | jint count;
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| 258 | } ObjectBatch;
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| 259 |
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| 260 | /*
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| 261 | * JNI signature constants, beyond those defined in JDWP_TAG(*)
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| 262 | */
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| 263 | #define SIGNATURE_BEGIN_ARGS '('
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| 264 | #define SIGNATURE_END_ARGS ')'
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| 265 | #define SIGNATURE_END_CLASS ';'
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| 266 |
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| 267 | /*
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| 268 | * Modifier flags for classes, fields, methods
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| 269 | */
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| 270 | #define MOD_PUBLIC 0x0001 /* visible to everyone */
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| 271 | #define MOD_PRIVATE 0x0002 /* visible only to the defining class */
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| 272 | #define MOD_PROTECTED 0x0004 /* visible to subclasses */
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| 273 | #define MOD_STATIC 0x0008 /* instance variable is static */
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| 274 | #define MOD_FINAL 0x0010 /* no further subclassing, overriding */
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| 275 | #define MOD_SYNCHRONIZED 0x0020 /* wrap method call in monitor lock */
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| 276 | #define MOD_VOLATILE 0x0040 /* can cache in registers */
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| 277 | #define MOD_TRANSIENT 0x0080 /* not persistant */
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| 278 | #define MOD_NATIVE 0x0100 /* implemented in C */
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| 279 | #define MOD_INTERFACE 0x0200 /* class is an interface */
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| 280 | #define MOD_ABSTRACT 0x0400 /* no definition provided */
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| 281 | /*
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| 282 | * Additional modifiers not defined as such in the JVM spec
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| 283 | */
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| 284 | #define MOD_SYNTHETIC 0xf0000000 /* not in source code */
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| 285 |
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| 286 | /*
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| 287 | * jlong conversion macros
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| 288 | */
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| 289 | #define jlong_zero ((jlong) 0)
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| 290 | #define jlong_one ((jlong) 1)
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| 291 |
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| 292 | #define jlong_to_ptr(a) ((void*)(intptr_t)(a))
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| 293 | #define ptr_to_jlong(a) ((jlong)(intptr_t)(a))
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| 294 | #define jint_to_jlong(a) ((jlong)(a))
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| 295 | #define jlong_to_jint(a) ((jint)(a))
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| 296 |
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| 297 |
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| 298 | /*
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| 299 | * util funcs
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| 300 | */
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| 301 | void util_initialize(JNIEnv *env);
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| 302 | void util_reset(void);
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| 303 |
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| 304 | struct PacketInputStream;
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| 305 | struct PacketOutputStream;
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| 306 |
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| 307 | jint uniqueID(void);
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| 308 | jbyte referenceTypeTag(jclass clazz);
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| 309 | jbyte specificTypeKey(JNIEnv *env, jobject object);
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| 310 | jboolean isObjectTag(jbyte tag);
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| 311 | jvmtiError spawnNewThread(jvmtiStartFunction func, void *arg, char *name);
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| 312 | void convertSignatureToClassname(char *convert);
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| 313 | void writeCodeLocation(struct PacketOutputStream *out, jclass clazz,
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| 314 | jmethodID method, jlocation location);
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| 315 |
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| 316 | jvmtiError classInstances(jclass klass, ObjectBatch *instances, int maxInstances);
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| 317 | jvmtiError classInstanceCounts(jint classCount, jclass *classes, jlong *counts);
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| 318 | jvmtiError objectReferrers(jobject obj, ObjectBatch *referrers, int maxObjects);
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| 319 |
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| 320 | /*
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| 321 | * Command handling helpers shared among multiple command sets
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| 322 | */
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| 323 | int filterDebugThreads(jthread *threads, int count);
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| 324 |
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| 325 |
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| 326 | void sharedGetFieldValues(struct PacketInputStream *in,
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| 327 | struct PacketOutputStream *out,
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| 328 | jboolean isStatic);
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| 329 | jboolean sharedInvoke(struct PacketInputStream *in,
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| 330 | struct PacketOutputStream *out);
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| 331 |
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| 332 | jvmtiError fieldSignature(jclass, jfieldID, char **, char **, char **);
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| 333 | jvmtiError fieldModifiers(jclass, jfieldID, jint *);
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| 334 | jvmtiError methodSignature(jmethodID, char **, char **, char **);
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| 335 | jvmtiError methodReturnType(jmethodID, char *);
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| 336 | jvmtiError methodModifiers(jmethodID, jint *);
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| 337 | jvmtiError methodClass(jmethodID, jclass *);
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| 338 | jvmtiError methodLocation(jmethodID, jlocation*, jlocation*);
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| 339 | jvmtiError classLoader(jclass, jobject *);
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| 340 |
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| 341 | /*
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| 342 | * Thin wrappers on top of JNI
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| 343 | */
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| 344 | JNIEnv *getEnv(void);
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| 345 | jboolean isClass(jobject object);
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| 346 | jboolean isThread(jobject object);
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| 347 | jboolean isThreadGroup(jobject object);
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| 348 | jboolean isString(jobject object);
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| 349 | jboolean isClassLoader(jobject object);
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| 350 | jboolean isArray(jobject object);
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| 351 |
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| 352 | /*
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| 353 | * Thin wrappers on top of JVMTI
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| 354 | */
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| 355 | jvmtiError jvmtiGetCapabilities(jvmtiCapabilities *caps);
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| 356 | jint jvmtiMajorVersion(void);
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| 357 | jint jvmtiMinorVersion(void);
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| 358 | jint jvmtiMicroVersion(void);
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| 359 | jvmtiError getSourceDebugExtension(jclass clazz, char **extensionPtr);
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| 360 | jboolean canSuspendResumeThreadLists(void);
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| 361 |
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| 362 | jrawMonitorID debugMonitorCreate(char *name);
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| 363 | void debugMonitorEnter(jrawMonitorID theLock);
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| 364 | void debugMonitorExit(jrawMonitorID theLock);
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| 365 | void debugMonitorWait(jrawMonitorID theLock);
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| 366 | void debugMonitorTimedWait(jrawMonitorID theLock, jlong millis);
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| 367 | void debugMonitorNotify(jrawMonitorID theLock);
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| 368 | void debugMonitorNotifyAll(jrawMonitorID theLock);
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| 369 | void debugMonitorDestroy(jrawMonitorID theLock);
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| 370 |
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| 371 | jthread *allThreads(jint *count);
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| 372 |
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| 373 | void threadGroupInfo(jthreadGroup, jvmtiThreadGroupInfo *info);
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| 374 |
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| 375 | char *getClassname(jclass);
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| 376 | jvmtiError classSignature(jclass, char**, char**);
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| 377 | jint classStatus(jclass);
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| 378 | void writeGenericSignature(struct PacketOutputStream *, char *);
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| 379 | jboolean isMethodNative(jmethodID);
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| 380 | jboolean isMethodObsolete(jmethodID);
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| 381 | jvmtiError isMethodSynthetic(jmethodID, jboolean*);
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| 382 | jvmtiError isFieldSynthetic(jclass, jfieldID, jboolean*);
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| 383 |
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| 384 | jboolean isSameObject(JNIEnv *env, jobject o1, jobject o2);
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| 385 |
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| 386 | jint objectHashCode(jobject);
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| 387 |
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| 388 | jvmtiError allInterfaces(jclass clazz, jclass **ppinterfaces, jint *count);
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| 389 | jvmtiError allLoadedClasses(jclass **ppclasses, jint *count);
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| 390 | jvmtiError allClassLoaderClasses(jobject loader, jclass **ppclasses, jint *count);
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| 391 | jvmtiError allNestedClasses(jclass clazz, jclass **ppnested, jint *pcount);
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| 392 |
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| 393 | void setAgentPropertyValue(JNIEnv *env, char *propertyName, char* propertyValue);
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| 394 |
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| 395 | void *jvmtiAllocate(jint numBytes);
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| 396 | void jvmtiDeallocate(void *buffer);
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| 397 |
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| 398 | void eventIndexInit(void);
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| 399 | jdwpEvent eventIndex2jdwp(EventIndex i);
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| 400 | jvmtiEvent eventIndex2jvmti(EventIndex i);
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| 401 | EventIndex jdwp2EventIndex(jdwpEvent eventType);
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| 402 | EventIndex jvmti2EventIndex(jvmtiEvent kind);
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| 403 |
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| 404 | jvmtiError map2jvmtiError(jdwpError);
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| 405 | jdwpError map2jdwpError(jvmtiError);
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| 406 | jdwpThreadStatus map2jdwpThreadStatus(jint state);
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| 407 | jint map2jdwpSuspendStatus(jint state);
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| 408 | jint map2jdwpClassStatus(jint);
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| 409 |
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| 410 | void log_debugee_location(const char *func,
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| 411 | jthread thread, jmethodID method, jlocation location);
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| 412 |
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| 413 | /*
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| 414 | * Local Reference management. The two macros below are used
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| 415 | * throughout the back end whenever space for JNI local references
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| 416 | * is needed in the current frame.
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| 417 | */
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| 418 |
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| 419 | void createLocalRefSpace(JNIEnv *env, jint capacity);
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| 420 |
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| 421 | #define WITH_LOCAL_REFS(env, number) \
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| 422 | createLocalRefSpace(env, number); \
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| 423 | { /* BEGINNING OF WITH SCOPE */
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| 424 |
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| 425 | #define END_WITH_LOCAL_REFS(env) \
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| 426 | JNI_FUNC_PTR(env,PopLocalFrame)(env, NULL); \
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| 427 | } /* END OF WITH SCOPE */
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| 428 |
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| 429 | void saveGlobalRef(JNIEnv *env, jobject obj, jobject *pobj);
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| 430 | void tossGlobalRef(JNIEnv *env, jobject *pobj);
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| 431 |
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| 432 | #endif
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