506 lines
19 KiB
C++
506 lines
19 KiB
C++
/*
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* Copyright (c) 2003, 2018, Oracle and/or its affiliates. All rights reserved.
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
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*
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* This code is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 only, as
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* published by the Free Software Foundation.
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*
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* This code is distributed in the hope that it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* version 2 for more details (a copy is included in the LICENSE file that
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* accompanied this code).
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*
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* You should have received a copy of the GNU General Public License version
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* 2 along with this work; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
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*
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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* or visit www.oracle.com if you need additional information or have any
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* questions.
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*/
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#include <stdio.h>
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#include <string.h>
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#include <inttypes.h>
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#include "jvmti.h"
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#include "agent_common.h"
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#include "JVMTITools.h"
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extern "C" {
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#define PASSED 0
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#define STATUS_FAILED 2
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typedef struct {
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jfieldID fid;
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char *m_cls;
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char *m_name;
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char *m_sig;
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jlocation loc;
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char *f_cls;
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char *f_name;
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char *f_sig;
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jboolean is_static;
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jvalue val;
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} writable_watch_info;
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typedef struct {
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jfieldID fid;
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const char *m_cls;
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const char *m_name;
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const char *m_sig;
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jlocation loc;
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const char *f_cls;
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const char *f_name;
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const char *f_sig;
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jboolean is_static;
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jvalue val;
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} watch_info;
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static jvmtiEnv *jvmti;
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static jvmtiEventCallbacks callbacks;
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static jvmtiCapabilities caps;
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static jint result = PASSED;
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static jboolean printdump = JNI_FALSE;
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static int eventsExpected = 0;
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static int eventsCount = 0;
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static watch_info watches[] = {
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{ NULL, "Lnsk/jvmti/FieldModification/fieldmod002;", "check", "(Ljava/lang/Object;)I", 0,
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"Lnsk/jvmti/FieldModification/fieldmod002a;", "staticBoolean", "Z", JNI_TRUE, {} },
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{ NULL, "Lnsk/jvmti/FieldModification/fieldmod002;", "check", "(Ljava/lang/Object;)I", 0,
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"Lnsk/jvmti/FieldModification/fieldmod002a;", "staticByte", "B", JNI_TRUE, {} },
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{ NULL, "Lnsk/jvmti/FieldModification/fieldmod002;", "check", "(Ljava/lang/Object;)I", 0,
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"Lnsk/jvmti/FieldModification/fieldmod002a;", "staticShort", "S", JNI_TRUE, {} },
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{ NULL, "Lnsk/jvmti/FieldModification/fieldmod002;", "check", "(Ljava/lang/Object;)I", 0,
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"Lnsk/jvmti/FieldModification/fieldmod002a;", "staticInt", "I", JNI_TRUE, {} },
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{ NULL, "Lnsk/jvmti/FieldModification/fieldmod002;", "check", "(Ljava/lang/Object;)I", 0,
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"Lnsk/jvmti/FieldModification/fieldmod002a;", "staticLong", "J", JNI_TRUE, {} },
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{ NULL, "Lnsk/jvmti/FieldModification/fieldmod002;", "check", "(Ljava/lang/Object;)I", 0,
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"Lnsk/jvmti/FieldModification/fieldmod002a;", "staticFloat", "F", JNI_TRUE, {} },
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{ NULL, "Lnsk/jvmti/FieldModification/fieldmod002;", "check", "(Ljava/lang/Object;)I", 0,
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"Lnsk/jvmti/FieldModification/fieldmod002a;", "staticDouble", "D", JNI_TRUE, {} },
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{ NULL, "Lnsk/jvmti/FieldModification/fieldmod002;", "check", "(Ljava/lang/Object;)I", 0,
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"Lnsk/jvmti/FieldModification/fieldmod002a;", "staticChar", "C", JNI_TRUE, {} },
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{ NULL, "Lnsk/jvmti/FieldModification/fieldmod002;", "check", "(Ljava/lang/Object;)I", 0,
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"Lnsk/jvmti/FieldModification/fieldmod002a;", "staticObject", "Ljava/lang/Object;", JNI_TRUE, {} },
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{ NULL, "Lnsk/jvmti/FieldModification/fieldmod002;", "check", "(Ljava/lang/Object;)I", 0,
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"Lnsk/jvmti/FieldModification/fieldmod002a;", "staticArrInt", "[I", JNI_TRUE, {} },
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{ NULL, "Lnsk/jvmti/FieldModification/fieldmod002;", "check", "(Ljava/lang/Object;)I", 0,
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"Lnsk/jvmti/FieldModification/fieldmod002a;", "instanceBoolean", "Z", JNI_FALSE, {} },
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{ NULL, "Lnsk/jvmti/FieldModification/fieldmod002;", "check", "(Ljava/lang/Object;)I", 0,
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"Lnsk/jvmti/FieldModification/fieldmod002a;", "instanceByte", "B", JNI_FALSE, {} },
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{ NULL, "Lnsk/jvmti/FieldModification/fieldmod002;", "check", "(Ljava/lang/Object;)I", 0,
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"Lnsk/jvmti/FieldModification/fieldmod002a;", "instanceShort", "S", JNI_FALSE, {} },
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{ NULL, "Lnsk/jvmti/FieldModification/fieldmod002;", "check", "(Ljava/lang/Object;)I", 0,
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"Lnsk/jvmti/FieldModification/fieldmod002a;", "instanceInt", "I", JNI_FALSE, {} },
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{ NULL, "Lnsk/jvmti/FieldModification/fieldmod002;", "check", "(Ljava/lang/Object;)I", 0,
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"Lnsk/jvmti/FieldModification/fieldmod002a;", "instanceLong", "J", JNI_FALSE, {} },
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{ NULL, "Lnsk/jvmti/FieldModification/fieldmod002;", "check", "(Ljava/lang/Object;)I", 0,
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"Lnsk/jvmti/FieldModification/fieldmod002a;", "instanceFloat", "F", JNI_FALSE, {} },
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{ NULL, "Lnsk/jvmti/FieldModification/fieldmod002;", "check", "(Ljava/lang/Object;)I", 0,
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"Lnsk/jvmti/FieldModification/fieldmod002a;", "instanceDouble", "D", JNI_FALSE, {} },
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{ NULL, "Lnsk/jvmti/FieldModification/fieldmod002;", "check", "(Ljava/lang/Object;)I", 0,
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"Lnsk/jvmti/FieldModification/fieldmod002a;", "instanceChar", "C", JNI_FALSE, {} },
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{ NULL, "Lnsk/jvmti/FieldModification/fieldmod002;", "check", "(Ljava/lang/Object;)I", 0,
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"Lnsk/jvmti/FieldModification/fieldmod002a;", "instanceObject", "Ljava/lang/Object;", JNI_FALSE, {} },
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{ NULL, "Lnsk/jvmti/FieldModification/fieldmod002;", "check", "(Ljava/lang/Object;)I", 0,
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"Lnsk/jvmti/FieldModification/fieldmod002a;", "instanceArrInt", "[I", JNI_FALSE, {} }
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};
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void printValue(jvalue val, char *sig) {
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switch (*sig) {
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case 'J':
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printf("0x%x%08x", (jint)(val.j >> 32), (jint)val.j);
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break;
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case 'F':
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printf("%.3f", (double)val.f);
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break;
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case 'D':
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printf("%f", (double)val.d);
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break;
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case 'L':
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case '[':
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printf("0x%p", val.l);
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break;
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case 'Z':
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printf("0x%x", val.z);
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break;
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case 'B':
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printf("%d", val.b);
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break;
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case 'S':
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printf("%d", val.s);
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break;
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case 'C':
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printf("0x%x", val.c);
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break;
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case 'I':
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printf("%d", val.i);
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break;
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default:
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printf("0x%x%08x", (jint)(val.j >> 32), (jint)val.j);
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break;
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}
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}
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int isEqual(JNIEnv *env, char *sig, jvalue v1, jvalue v2) {
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switch (*sig) {
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case 'J':
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return (v1.j == v2.j);
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case 'F':
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return (v1.f == v2.f);
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case 'D':
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return (v1.d == v2.d);
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case 'L':
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case '[':
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return env->IsSameObject(v1.l, v2.l);
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case 'Z':
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return (v1.z == v2.z);
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case 'B':
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return (v1.b == v2.b);
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case 'S':
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return (v1.s == v2.s);
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case 'C':
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return (v1.c == v2.c);
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case 'I':
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return (v1.i == v2.i);
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default:
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return (1);
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}
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}
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void JNICALL FieldModification(jvmtiEnv *jvmti_env, JNIEnv *env,
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jthread thr, jmethodID method, jlocation location,
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jclass field_klass, jobject obj,
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jfieldID field, char sig, jvalue new_value) {
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jvmtiError err;
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jclass cls;
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writable_watch_info watch;
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char *generic;
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size_t i;
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eventsCount++;
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if (printdump == JNI_TRUE) {
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printf(">>> retrieving modification watch info ...\n");
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}
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watch.fid = field;
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watch.loc = location;
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watch.is_static = (obj == NULL) ? JNI_TRUE : JNI_FALSE;
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watch.val = new_value;
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err = jvmti_env->GetMethodDeclaringClass(method, &cls);
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if (err != JVMTI_ERROR_NONE) {
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printf("(GetMethodDeclaringClass) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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result = STATUS_FAILED;
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}
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err = jvmti_env->GetClassSignature(cls,
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&watch.m_cls, &generic);
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if (err != JVMTI_ERROR_NONE) {
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printf("(GetClassSignature) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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result = STATUS_FAILED;
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}
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err = jvmti_env->GetMethodName(method, &watch.m_name, &watch.m_sig, &generic);
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if (err != JVMTI_ERROR_NONE) {
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printf("(GetMethodName) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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result = STATUS_FAILED;
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}
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err = jvmti_env->GetClassSignature(field_klass,
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&watch.f_cls, &generic);
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if (err != JVMTI_ERROR_NONE) {
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printf("(GetClassSignature) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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result = STATUS_FAILED;
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}
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err = jvmti_env->GetFieldName(field_klass, field,
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&watch.f_name, &watch.f_sig, &generic);
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if (err != JVMTI_ERROR_NONE) {
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printf("(GetFieldName) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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result = STATUS_FAILED;
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}
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if (printdump == JNI_TRUE) {
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printf(">>> class: \"%s\"\n", watch.m_cls);
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printf(">>> method: \"%s%s\"\n", watch.m_name, watch.m_sig);
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printf(">>> location: 0x%x%08x\n",
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(jint)(watch.loc >> 32), (jint)watch.loc);
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printf(">>> field cls: \"%s\"\n", watch.f_cls);
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printf(">>> field: \"%s:%s\"\n", watch.f_name, watch.f_sig);
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printf(">>> object: 0x%p\n", obj);
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printf(">>> new value: ");
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printValue(watch.val, watch.f_sig);
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printf("\n");
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}
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for (i = 0; i < sizeof(watches)/sizeof(watch_info); i++) {
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if (watch.fid == watches[i].fid) {
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if (watch.m_cls == NULL ||
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strcmp(watch.m_cls, watches[i].m_cls) != 0) {
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printf("(watch#%" PRIuPTR ") wrong class: \"%s\", expected: \"%s\"\n",
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i, watch.m_cls, watches[i].m_cls);
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result = STATUS_FAILED;
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}
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if (watch.m_name == NULL ||
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strcmp(watch.m_name, watches[i].m_name) != 0) {
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printf("(watch#%" PRIuPTR ") wrong method name: \"%s\"",
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i, watch.m_name);
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printf(", expected: \"%s\"\n", watches[i].m_name);
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result = STATUS_FAILED;
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}
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if (watch.m_sig == NULL ||
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strcmp(watch.m_sig, watches[i].m_sig) != 0) {
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printf("(watch#%" PRIuPTR ") wrong method sig: \"%s\"",
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i, watch.m_sig);
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printf(", expected: \"%s\"\n", watches[i].m_sig);
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result = STATUS_FAILED;
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}
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if (watch.loc != watches[i].loc) {
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printf("(watch#%" PRIuPTR ") wrong location: 0x%x%08x",
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i, (jint)(watch.loc >> 32), (jint)watch.loc);
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printf(", expected: 0x%x%08x\n",
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(jint)(watches[i].loc >> 32), (jint)watches[i].loc);
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result = STATUS_FAILED;
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}
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if (watch.f_name == NULL ||
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strcmp(watch.f_name, watches[i].f_name) != 0) {
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printf("(watch#%" PRIuPTR ") wrong field name: \"%s\"",
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i, watch.f_name);
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printf(", expected: \"%s\"\n", watches[i].f_name);
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result = STATUS_FAILED;
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}
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if (watch.f_sig == NULL ||
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strcmp(watch.f_sig, watches[i].f_sig) != 0) {
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printf("(watch#%" PRIuPTR ") wrong field sig: \"%s\"",
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i, watch.f_sig);
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printf(", expected: \"%s\"\n", watches[i].f_sig);
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result = STATUS_FAILED;
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}
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if (watch.is_static != watches[i].is_static) {
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printf("(watch#%" PRIuPTR ") wrong field type: %s", i,
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(watch.is_static == JNI_TRUE) ? "static" : "instance");
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printf(", expected: %s\n",
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(watches[i].is_static == JNI_TRUE) ? "static" : "instance");
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result = STATUS_FAILED;
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}
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if (!isEqual((JNIEnv *)env, watch.f_sig, watch.val, watches[i].val)) {
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printf("(watch#%" PRIuPTR ") wrong new value: ", i);
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printValue(watch.val, watch.f_sig);
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printf(", expected: ");
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printValue(watches[i].val, watch.f_sig);
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printf("\n");
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result = STATUS_FAILED;
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}
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return;
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}
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}
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printf("Unexpected field modification catched: 0x%p\n", watch.fid);
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result = STATUS_FAILED;
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}
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#ifdef STATIC_BUILD
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JNIEXPORT jint JNICALL Agent_OnLoad_fieldmod002(JavaVM *jvm, char *options, void *reserved) {
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return Agent_Initialize(jvm, options, reserved);
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}
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JNIEXPORT jint JNICALL Agent_OnAttach_fieldmod002(JavaVM *jvm, char *options, void *reserved) {
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return Agent_Initialize(jvm, options, reserved);
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}
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JNIEXPORT jint JNI_OnLoad_fieldmod002(JavaVM *jvm, char *options, void *reserved) {
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return JNI_VERSION_1_8;
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}
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#endif
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jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) {
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jvmtiError err;
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jint res;
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if (options != NULL && strcmp(options, "printdump") == 0) {
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printdump = JNI_TRUE;
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}
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res = jvm->GetEnv((void **) &jvmti, JVMTI_VERSION_1_1);
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if (res != JNI_OK || jvmti == NULL) {
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printf("Wrong result of a valid call to GetEnv!\n");
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return JNI_ERR;
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}
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err = jvmti->GetPotentialCapabilities(&caps);
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if (err != JVMTI_ERROR_NONE) {
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printf("(GetPotentialCapabilities) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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return JNI_ERR;
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}
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err = jvmti->AddCapabilities(&caps);
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if (err != JVMTI_ERROR_NONE) {
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printf("(AddCapabilities) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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return JNI_ERR;
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}
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err = jvmti->GetCapabilities(&caps);
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if (err != JVMTI_ERROR_NONE) {
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printf("(GetCapabilities) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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return JNI_ERR;
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}
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if (caps.can_generate_field_modification_events) {
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callbacks.FieldModification = &FieldModification;
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err = jvmti->SetEventCallbacks(&callbacks, sizeof(callbacks));
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if (err != JVMTI_ERROR_NONE) {
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printf("(SetEventCallbacks) unexpected error: %s (%d)\n",
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TranslateError(err), err);
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return JNI_ERR;
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}
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err = jvmti->SetEventNotificationMode(JVMTI_ENABLE,
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JVMTI_EVENT_FIELD_MODIFICATION, NULL);
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if (err != JVMTI_ERROR_NONE) {
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printf("Failed to enable JVMTI_EVENT_FIELD_MODIFICATION: %s (%d)\n",
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TranslateError(err), err);
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return JNI_ERR;
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}
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} else {
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printf("Warning: FieldModification watch is not implemented\n");
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}
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return JNI_OK;
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}
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JNIEXPORT void JNICALL
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Java_nsk_jvmti_FieldModification_fieldmod002_getReady(JNIEnv *env, jclass clz) {
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jvmtiError err;
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jclass cls;
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jmethodID ctor;
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jintArray arr1, arr2;
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jobject obj1, obj2;
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size_t i;
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if (!caps.can_generate_field_modification_events) {
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return;
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}
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if (printdump == JNI_TRUE) {
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printf(">>> setting field modification watches ...\n");
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}
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cls = env->FindClass("nsk/jvmti/FieldModification/fieldmod002a");
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if (cls == NULL) {
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printf("Cannot find fieldmod001a class!\n");
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result = STATUS_FAILED;
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return;
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}
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for (i = 0; i < sizeof(watches)/sizeof(watch_info); i++) {
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if (watches[i].is_static == JNI_TRUE) {
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watches[i].fid = env->GetStaticFieldID(
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cls, watches[i].f_name, watches[i].f_sig);
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} else {
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watches[i].fid = env->GetFieldID(
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cls, watches[i].f_name, watches[i].f_sig);
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}
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if (watches[i].fid == NULL) {
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printf("Cannot get field ID for \"%s:%s\"\n",
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watches[i].f_name, watches[i].f_sig);
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result = STATUS_FAILED;
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return;
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}
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err = jvmti->SetFieldModificationWatch(cls, watches[i].fid);
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if (err == JVMTI_ERROR_NONE) {
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eventsExpected++;
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} else {
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printf("(SetFieldModificationWatch#%" PRIuPTR ") unexpected error: %s (%d)\n",
|
|
i, TranslateError(err), err);
|
|
result = STATUS_FAILED;
|
|
}
|
|
}
|
|
|
|
ctor = env->GetMethodID(cls, "<init>", "()V");
|
|
obj1 = env->NewGlobalRef(env->NewObject(cls, ctor));
|
|
obj2 = env->NewGlobalRef(env->NewObject(cls, ctor));
|
|
arr1 = (jintArray) env->NewGlobalRef(env->NewIntArray((jsize) 1));
|
|
arr2 = (jintArray) env->NewGlobalRef(env->NewIntArray((jsize) 1));
|
|
|
|
watches[0].val.z = JNI_TRUE;
|
|
watches[1].val.b = 1;
|
|
watches[2].val.s = 2;
|
|
watches[3].val.i = 3;
|
|
watches[4].val.j = 4;
|
|
watches[5].val.f = 0.5F;
|
|
watches[6].val.d = 0.6;
|
|
watches[7].val.c = 0x7;
|
|
watches[8].val.l = obj1;
|
|
watches[9].val.l = arr1;
|
|
|
|
watches[10].val.z = JNI_FALSE;
|
|
watches[11].val.b = 10;
|
|
watches[12].val.s = 20;
|
|
watches[13].val.i = 30;
|
|
watches[14].val.j = 40;
|
|
watches[15].val.f = 0.05F;
|
|
watches[16].val.d = 0.06;
|
|
watches[17].val.c = 0x70;
|
|
watches[18].val.l = obj2;
|
|
watches[19].val.l = arr2;
|
|
|
|
if (printdump == JNI_TRUE) {
|
|
printf(">>> ... done\n");
|
|
}
|
|
}
|
|
|
|
JNIEXPORT jint JNICALL
|
|
Java_nsk_jvmti_FieldModification_fieldmod002_check(JNIEnv *env,
|
|
jclass clz, jobject obj) {
|
|
jclass cls;
|
|
|
|
if (!caps.can_generate_field_modification_events) {
|
|
return PASSED;
|
|
}
|
|
|
|
if (printdump == JNI_TRUE) {
|
|
printf(">>> modifying fields ...\n");
|
|
}
|
|
|
|
cls = env->FindClass("nsk/jvmti/FieldModification/fieldmod002a");
|
|
if (cls == NULL) {
|
|
printf("Cannot find fieldmod001a class!\n");
|
|
return STATUS_FAILED;
|
|
}
|
|
|
|
env->SetStaticBooleanField(cls, watches[0].fid, watches[0].val.z);
|
|
env->SetStaticByteField(cls, watches[1].fid, watches[1].val.b);
|
|
env->SetStaticShortField(cls, watches[2].fid, watches[2].val.s);
|
|
env->SetStaticIntField(cls, watches[3].fid, watches[3].val.i);
|
|
env->SetStaticLongField(cls, watches[4].fid, watches[4].val.j);
|
|
env->SetStaticFloatField(cls, watches[5].fid, watches[5].val.f);
|
|
env->SetStaticDoubleField(cls, watches[6].fid, watches[6].val.d);
|
|
env->SetStaticCharField(cls, watches[7].fid, watches[7].val.c);
|
|
env->SetStaticObjectField(cls, watches[8].fid, watches[8].val.l);
|
|
env->SetStaticObjectField(cls, watches[9].fid, watches[9].val.l);
|
|
|
|
env->SetBooleanField(obj, watches[10].fid, watches[10].val.z);
|
|
env->SetByteField(obj, watches[11].fid, watches[11].val.b);
|
|
env->SetShortField(obj, watches[12].fid, watches[12].val.s);
|
|
env->SetIntField(obj, watches[13].fid, watches[13].val.i);
|
|
env->SetLongField(obj, watches[14].fid, watches[14].val.j);
|
|
env->SetFloatField(obj, watches[15].fid, watches[15].val.f);
|
|
env->SetDoubleField(obj, watches[16].fid, watches[16].val.d);
|
|
env->SetCharField(obj, watches[17].fid, watches[17].val.c);
|
|
env->SetObjectField(obj, watches[18].fid, watches[18].val.l);
|
|
env->SetObjectField(obj, watches[19].fid, watches[19].val.l);
|
|
|
|
if (printdump == JNI_TRUE) {
|
|
printf(">>> ... done\n");
|
|
}
|
|
|
|
if (eventsCount != eventsExpected) {
|
|
printf("Wrong number of field modification events: %d, expected: %d\n",
|
|
eventsCount, eventsExpected);
|
|
result = STATUS_FAILED;
|
|
}
|
|
return result;
|
|
}
|
|
|
|
}
|