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 
  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 #ifdef STATIC_BUILD
  61 JNIEXPORT jint JNICALL Agent_OnLoad_JvmtiTest(JavaVM *jvm, char *options, void *reserved) {
  62     return Agent_Initialize(jvm, options, reserved);
  63 }
  64 JNIEXPORT jint JNICALL Agent_OnAttach_JvmtiTest(JavaVM *jvm, char *options, void *reserved) {
  65     return Agent_Initialize(jvm, options, reserved);
  66 }
  67 JNIEXPORT jint JNI_OnLoad_JvmtiTest(JavaVM *jvm, char *options, void *reserved) {
  68     return JNI_VERSION_1_8;
  69 }
  70 #endif
  71 jint Agent_Initialize(JavaVM * jvm, char *options, void *reserved) {
  72     jint res;
  73     jint count;
  74     char **properties;
  75     int i;
  76 
  77     if (options && strlen(options) > 0) {
  78         if (strstr(options, "printdump")) {
  79             printdump = 1;
  80         }
  81     }
  82 
  83     res = jvm->GetEnv((void **) &jvmti, JVMTI_VERSION_1_1);
  84     if (res < 0) {
  85         debug_printf("Wrong result of a valid call to GetEnv!\n");
  86         return JNI_ERR;
  87     }
  88 
  89 
  90     /* Add capabilities */
  91     res = jvmti->GetPotentialCapabilities(&jvmti_caps);
  92     JVMTI_ERROR_CHECK("GetPotentialCapabilities returned error", res);
  93 
  94     res = jvmti->AddCapabilities(&jvmti_caps);
  95     JVMTI_ERROR_CHECK("GetAddCapabilities returned error", res);
  96 
  97 
  98     res = jvmti->GetSystemProperties(&count, &properties);
  99 
 100     JVMTI_ERROR_CHECK("GetSystemProperties returned error", res);
 101 
 102     for (i=0; i< count; i++) {
 103         char *value;
 104 
 105         res = jvmti->GetSystemProperty((const char *) properties[i], &value);
 106         JVMTI_ERROR_CHECK("GetSystemProperty returned error", res);
 107         debug_printf(" %s    %s \n", properties[i], value);
 108 
 109         /* Only writeable properties returns JVMTI_ERROR_NONE. */
 110         res = jvmti->SetSystemProperty((const char *) properties[i], value);
 111         debug_printf("SetSystemProperty returned error %d\n", res);
 112 
 113      }
 114 
 115     return JNI_OK;
 116 }
 117 
 118 
 119 JNIEXPORT jint JNICALL
 120 Java_nsk_jvmti_unit_functions_environment_JvmtiTest_GetResult(JNIEnv * env, jclass cls) {
 121     return iGlobalStatus;
 122 }
 123 
 124 
 125 }