/*

 * Copyright (c) 2003, 2018, Oracle and/or its affiliates. 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.

 *

 * 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

#include <stdio.h>

#include <string.h>

#include "jvmti.h"

#include "agent_common.h"

#ifdef __cplusplus

extern "C" {

#endif

#ifndef JNI_ENV_ARG

#ifdef __cplusplus

#define JNI_ENV_ARG(x, y) y

#define JNI_ENV_ARG1(x)

#define JNI_ENV_PTR(x) x

#else

#define JNI_ENV_ARG(x,y) x, y

#define JNI_ENV_ARG1(x) x

#define JNI_ENV_PTR(x) (*x)

#endif

#endif

#define JVMTI_ENV_ARG JNI_ENV_ARG

#define JVMTI_ENV_ARG1 JNI_ENV_ARG1

#define JVMTI_ENV_PTR JNI_ENV_PTR

#define JVMTI_ERROR_CHECK(str,res) if ( res != JVMTI_ERROR_NONE) { printf(str); printf("%d\n",res); return res;}

#define JVMTI_ERROR_CHECK_EXPECTED_ERROR(str,res,err) if ( res != err) { printf(str); printf("unexpected error %d\n",res); return res;}

#define JVMTI_ERROR_CHECK_VOID(str,res) if ( res != JVMTI_ERROR_NONE) { printf(str); printf("%d\n",res); iGlobalStatus = 2; }

#define JVMTI_ERROR_CHECK_EXPECTED_ERROR_VOID(str,res,err) if ( res != err) { printf(str); printf("unexpected error %d\n",res); iGlobalStatus = 2; }

#define THREADS_LIMIT 2000

jvmtiEnv *jvmti;

jint iGlobalStatus = 0;

jthread susp_thrd[THREADS_LIMIT];

static jvmtiEventCallbacks callbacks;

static jvmtiCapabilities jvmti_caps;

jrawMonitorID jraw_monitor[20];

int process_once = 0;

/* forward decl */

void print_method_name(jmethodID mid);

int printdump = 0;

    va_list args;

    va_start(args, fmt);

    if (printdump) {

        vprintf(fmt, args);

    }

    va_end(args);

}

void JNICALL vmInit(jvmtiEnv *jvmti_env, JNIEnv *env, jthread thread) {

    debug_printf("VMInit event\n");

}

void JNICALL vmExit(jvmtiEnv *jvmti_env, JNIEnv *env) {

    debug_printf("VMDeath event\n");

}

typedef jclass (*findLoadClass_type) (JNIEnv *env, jobject loader, jstring name);

findLoadClass_type findLoadedClass_func;

JNIEXPORT jclass JNICALL

my_findLoadedClass(JNIEnv *env, jobject loader, jstring name) {

  debug_printf("Intercepted findLoadedClass, name = %s\n", sname);

  return (*findLoadedClass_func)(env, loader, name);

}

void JNICALL testNativeMethodBind(jvmtiEnv* jvmti_env, JNIEnv *jni_env,

                      jthread thread, jmethodID mid, void* func, void** func_ptr) {

    jvmtiPhase phase;

    char *mname;

    char *signature;

    jint ret;

    if (ret != JVMTI_ERROR_NONE) {

      printf("Error: GetPhase %d\n", ret);

      iGlobalStatus = 2;

      return;

    }

    if (phase != JVMTI_PHASE_START && phase != JVMTI_PHASE_LIVE)

        return;

    debug_printf("bind event: \n");

    print_method_name(mid);

    if (ret == JVMTI_ERROR_NONE) {

      if (strcmp(mname, "findLoadedClass") == 0) {

        findLoadedClass_func = (findLoadClass_type)func;

        *func_ptr = (void*)my_findLoadedClass;

        debug_printf("REDIRECTED findLoadedClass\n");

      }

    }

}

void init_callbacks() {

    memset((void *)&callbacks, 0, sizeof(jvmtiEventCallbacks));

    callbacks.VMInit = vmInit;

    callbacks.VMDeath = vmExit;

    callbacks.NativeMethodBind = testNativeMethodBind;

}

#ifdef STATIC_BUILD

JNIEXPORT jint JNICALL Agent_OnLoad_JvmtiTest(JavaVM *jvm, char *options, void *reserved) {

    return Agent_Initialize(jvm, options, reserved);

}

JNIEXPORT jint JNICALL Agent_OnAttach_JvmtiTest(JavaVM *jvm, char *options, void *reserved) {

    return Agent_Initialize(jvm, options, reserved);

}

JNIEXPORT jint JNI_OnLoad_JvmtiTest(JavaVM *jvm, char *options, void *reserved) {

    return JNI_VERSION_1_8;

}

#endif

jint Agent_Initialize(JavaVM * jvm, char *options, void *reserved) {

    jint res;

    if (options && strlen(options) > 0) {

        if (strstr(options, "printdump")) {

            printdump = 1;

        }

    }

    res = JNI_ENV_PTR(jvm)->

        GetEnv(JNI_ENV_ARG(jvm, (void **) &jvmti), JVMTI_VERSION_1_1);

    if (res < 0) {

        printf("Wrong result of a valid call to GetEnv!\n");

        return JNI_ERR;

    }

    /* Add capabilities */

    res = JVMTI_ENV_PTR(jvmti)->GetPotentialCapabilities(JVMTI_ENV_ARG(jvmti, &jvmti_caps));

    JVMTI_ERROR_CHECK("GetPotentialCapabilities returned error", res);

    res = JVMTI_ENV_PTR(jvmti)->AddCapabilities(JVMTI_ENV_ARG(jvmti, &jvmti_caps));

    JVMTI_ERROR_CHECK("AddCapabilities returned error", res);

    /* Enable events */

    init_callbacks();

    res = JVMTI_ENV_PTR(jvmti)->SetEventCallbacks(JVMTI_ENV_ARG(jvmti, &callbacks), sizeof(callbacks));

    JVMTI_ERROR_CHECK("SetEventCallbacks returned error", res);

    res = JVMTI_ENV_PTR(jvmti)->SetEventNotificationMode(JVMTI_ENV_ARG(jvmti,JVMTI_ENABLE),JVMTI_EVENT_VM_INIT,NULL);

    JVMTI_ERROR_CHECK("SetEventNotificationMode for VM_INIT returned error", res);

    res = JVMTI_ENV_PTR(jvmti)->SetEventNotificationMode(JVMTI_ENV_ARG(jvmti,JVMTI_ENABLE),JVMTI_EVENT_VM_DEATH,NULL);

    JVMTI_ERROR_CHECK("SetEventNotificationMode for vm death event returned error", res);

    res = JVMTI_ENV_PTR(jvmti)->SetEventNotificationMode(JVMTI_ENV_ARG(jvmti,JVMTI_ENABLE),JVMTI_EVENT_NATIVE_METHOD_BIND,NULL);

    JVMTI_ERROR_CHECK("SetEventNotificationMode for native method bind event returned error", res);

    return JNI_OK;

}

JNIEXPORT jint JNICALL

Java_nsk_jvmti_unit_MethodBind_JvmtiTest_GetResult(JNIEnv * env, jclass cls) {

    return iGlobalStatus;

}

JNIEXPORT void JNICALL

    jvmtiError ret;

    char sz[128];

    sprintf(sz, "Rawmonitor-%d",i);

    debug_printf("jvmti create raw monitor \n");

    if (ret != JVMTI_ERROR_NONE) {

        printf("Error: ForceGarbageCollection %d \n", ret);

        iGlobalStatus = 2;

    }

}

JNIEXPORT void JNICALL

Java_nsk_jvmti_unit_MethodBind_JvmtiTest_RawMonitorEnter(JNIEnv * env, jclass cls, jint i) {

    jvmtiError ret;

    debug_printf("jvmti Raw monitor enter \n");

    if (ret != JVMTI_ERROR_NONE) {

        printf("Error: Raw monitor enter %d \n", ret);

        iGlobalStatus = 2;

    }

}

JNIEXPORT void JNICALL

Java_nsk_jvmti_unit_MethodBind_JvmtiTest_RawMonitorExit(JNIEnv * env, jclass cls, jint i) {

    jvmtiError ret;

    debug_printf("jvmti raw monitor exit \n");

    if (ret != JVMTI_ERROR_NONE) {

        printf("Error: RawMonitorExit %d \n", ret);

        iGlobalStatus = 2;

    }

}

JNIEXPORT void JNICALL

Java_nsk_jvmti_unit_MethodBind_JvmtiTest_RawMonitorWait(JNIEnv * env, jclass cls, jint i) {

    jvmtiError ret;

    debug_printf("jvmti RawMonitorWait \n");

    if (ret != JVMTI_ERROR_NONE) {

        printf("Error: RawMonitorWait %d \n", ret);

        iGlobalStatus = 2;

    }

}

JNIEXPORT void JNICALL

Java_nsk_jvmti_unit_MethodBind_JvmtiTest_RawMonitorNotify(JNIEnv * env, jclass cls, jint i) {

    jvmtiError ret;

    debug_printf("jvmti RawMonitorNotify \n");

    if (ret != JVMTI_ERROR_NONE) {

        printf("Error: RawMonitorNotify %d \n", ret);

        iGlobalStatus = 2;

    }

}

JNIEXPORT int JNICALL

Java_nsk_jvmti_unit_MethodBind_JvmtiTest_GetFrameCount(JNIEnv * env, jclass cls, jobject thr) {

    jvmtiError ret;

    jint count;

    debug_printf("jvmti GetFrameCount \n");

    if (ret != JVMTI_ERROR_NONE) {

        printf("Error: GetFrameCount returned  %d \n", ret);

        iGlobalStatus = 2;

    }

    return count;

}

void

print_method_name(jmethodID mid) {

    jvmtiError ret;

    char *mname;

    char *signature;

    if (ret != JVMTI_ERROR_NONE) {

      printf("Error: GetMethodDeclaringClass %d  \n", ret);

      iGlobalStatus = 2;

      return;

    }

    if (ret != JVMTI_ERROR_NONE) {

      printf("Error: GetClassSignature %d  \n", ret);

      iGlobalStatus = 2;

      return;

    }

    if (ret != JVMTI_ERROR_NONE) {

      printf("Error: GetMethodName %d  \n", ret);

      iGlobalStatus = 2;

      return;

    }

    debug_printf("%s::%s(%s)\n", clname, mname, signature);

}

JNIEXPORT void JNICALL

Java_nsk_jvmti_unit_MethodBind_JvmtiTest_GetStackTrace(JNIEnv * env, jclass cls, jobject thr) {

    jvmtiError ret;

    jvmtiFrameInfo *stack_buffer = NULL;

    jint max_count = 20;

    jint count;

    if (ret != JVMTI_ERROR_NONE) {

        printf("Error: Allocate failed with  %d \n", ret);

        iGlobalStatus = 2;

    }

    if (ret != JVMTI_ERROR_NONE) {

        printf("Error: GetStackTrace %d \n", ret);

        iGlobalStatus = 2;

    }

    if (ret != JVMTI_ERROR_NONE) {

        printf("Error: Deallocate failed with  %d \n", ret);

        iGlobalStatus = 2;

    }

}

JNIEXPORT void JNICALL

Java_nsk_jvmti_unit_MethodBind_JvmtiTest_SaveThreadInfo(JNIEnv * env, jclass cls, jobject oobj) {

}

#ifdef __cplusplus

}

#endif