1 /*
   2  * Copyright (c) 2003, 2018, Oracle and/or its affiliates. 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.
   8  *
   9  * This code is distributed in the hope that it will be useful, but WITHOUT
  10  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  11  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  12  * version 2 for more details (a copy is included in the LICENSE file that
  13  * accompanied this code).
  14  *
  15  * You should have received a copy of the GNU General Public License version
  16  * 2 along with this work; if not, write to the Free Software Foundation,
  17  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  18  *
  19  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  20  * or visit www.oracle.com if you need additional information or have any
  21  * questions.
  22  */
  23 
  24 #include <stdio.h>
  25 #include <string.h>
  26 #include "jvmti.h"
  27 #include "agent_common.h"
  28 
  29 extern "C" {
  30 
  31 
  32 #define JVMTI_ERROR_CHECK(str,res) if ( res != JVMTI_ERROR_NONE) { printf(str); printf(" %d\n",res); return res;}
  33 #define JVMTI_ERROR_CHECK_EXPECTED_ERROR(str,res,err) if ( res != err) { printf(str); printf("unexpected error %d\n",res); return res;}
  34 
  35 #define JVMTI_ERROR_CHECK_VOID(str,res) if ( res != JVMTI_ERROR_NONE) { printf(str); printf(" %d\n",res); iGlobalStatus = 2; }
  36 
  37 #define JVMTI_ERROR_CHECK_EXPECTED_ERROR_VOID(str,res,err) if ( res != err) { printf(str); printf(" unexpected error %d\n",res); iGlobalStatus = 2; }
  38 
  39 
  40 
  41 jvmtiEnv *jvmti;
  42 jint iGlobalStatus = 0;
  43 static jvmtiCapabilities jvmti_caps;
  44 static jvmtiEventCallbacks callbacks;
  45 
  46 
  47 int printdump = 0;
  48 
  49 
  50 void debug_printf(const char *fmt, ...) {
  51     va_list args;
  52 
  53     va_start(args, fmt);
  54     if (printdump) {
  55         vprintf(fmt, args);
  56     }
  57     va_end(args);
  58 }
  59 
  60 
  61 void JNICALL vmInit(jvmtiEnv *jvmti_env, JNIEnv *env, jthread thread) {
  62     jvmtiError res;
  63     debug_printf("VMInit event received\n");
  64     res = jvmti_env->DisposeEnvironment();
  65     JVMTI_ERROR_CHECK_VOID("DisposeEnvironment returned error", res);
  66 }
  67 
  68 
  69 void init_callbacks() {
  70 
  71     callbacks.VMInit = vmInit;
  72 
  73 }
  74 
  75 
  76 #ifdef STATIC_BUILD
  77 JNIEXPORT jint JNICALL Agent_OnLoad_JvmtiTest(JavaVM *jvm, char *options, void *reserved) {
  78     return Agent_Initialize(jvm, options, reserved);
  79 }
  80 JNIEXPORT jint JNICALL Agent_OnAttach_JvmtiTest(JavaVM *jvm, char *options, void *reserved) {
  81     return Agent_Initialize(jvm, options, reserved);
  82 }
  83 JNIEXPORT jint JNI_OnLoad_JvmtiTest(JavaVM *jvm, char *options, void *reserved) {
  84     return JNI_VERSION_1_8;
  85 }
  86 #endif
  87 jint Agent_Initialize(JavaVM * jvm, char *options, void *reserved) {
  88     jint res;
  89     jint count;
  90     char **properties;
  91     int i;
  92 
  93     if (options && strlen(options) > 0) {
  94         if (strstr(options, "printdump")) {
  95             printdump = 1;
  96         }
  97     }
  98 
  99     res = jvm->GetEnv((void **) &jvmti, JVMTI_VERSION_1_1);
 100     if (res < 0) {
 101         printf("Wrong result of a valid call to GetEnv!\n");
 102         return JNI_ERR;
 103     }
 104 
 105     /* Enable event call backs. */
 106     init_callbacks();
 107     res = jvmti->SetEventCallbacks(&callbacks, sizeof(callbacks));
 108     JVMTI_ERROR_CHECK("SetEventCallbacks returned error", res);
 109 
 110     /* Add capabilities */
 111     res = jvmti->GetPotentialCapabilities(&jvmti_caps);
 112     JVMTI_ERROR_CHECK("GetPotentialCapabilities returned error", res);
 113 
 114     res = jvmti->AddCapabilities(&jvmti_caps);
 115     JVMTI_ERROR_CHECK("GetAddCapabilities returned error", res);
 116 
 117 
 118     res = jvmti->SetEventNotificationMode(JVMTI_ENABLE, JVMTI_EVENT_VM_INIT, NULL);
 119     JVMTI_ERROR_CHECK("SetEventNotificationMode for VM_INIT returned error", res);
 120 
 121     res = jvmti->GetSystemProperties(&count, &properties);
 122 
 123     JVMTI_ERROR_CHECK("GetSystemProperties returned error", res);
 124 
 125     for (i=0; i< count; i++) {
 126         char *value;
 127 
 128         res = jvmti->GetSystemProperty((const char *) properties[i], &value);
 129         JVMTI_ERROR_CHECK("GetSystemProperty returned error", res);
 130         debug_printf(" %s    %s \n", properties[i], value);
 131 
 132         res = jvmti->SetSystemProperty((const char *) properties[i], value);
 133         debug_printf("SetSystemProperty returned error %d\n", res);
 134      }
 135 
 136     return JNI_OK;
 137 }
 138 
 139 
 140 JNIEXPORT jint JNICALL
 141 Java_nsk_jvmti_unit_functions_Dispose_JvmtiTest_GetResult(JNIEnv * env, jclass cls) {
 142     return iGlobalStatus;
 143 }
 144 
 145 
 146 }