/*

 * Copyright (c) 2004, 2019, 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 <string.h>

#include "jvmti.h"

#include "agent_common.h"

#include "jni_tools.h"

#include "jvmti_tools.h"

#include "JVMTITools.h"

extern "C" {

/* ============================================================================= */

/* scaffold objects */

static jvmtiEnv *jvmti = NULL;

static jlong timeout = 0;

static jrawMonitorID syncLock = NULL;

/* constant names */

#define STEP_NUMBER 3

#define NUMBER_OF_INVOCATIONS 1000

#define JVMTI_EVENT_COUNT   (int)(JVMTI_MAX_EVENT_TYPE_VAL - JVMTI_MIN_EVENT_TYPE_VAL + 1)

static int eventCount[JVMTI_EVENT_COUNT];

static int newEventCount[JVMTI_EVENT_COUNT];

/* ============================================================================= */

static void

showEventStatistics(int step) {

    int i;

    const char* str;

    int *currentCounts = (step == 1) ? &eventCount[0] : &newEventCount[0];

    NSK_DISPLAY0("\n");

    NSK_DISPLAY1("Event statistics for %d step:\n", step);

    NSK_DISPLAY0("-----------------------------\n");

    for (i = 0; i < JVMTI_EVENT_COUNT; i++) {

        if (currentCounts[i] > 0) {

            str = TranslateEvent((jvmtiEvent)(i+JVMTI_MIN_EVENT_TYPE_VAL));

            NSK_DISPLAY2("%-40s %7d\n", str, currentCounts[i]);

        }

    }

}

/* ========================================================================== */

int checkEvents(int step) {

    int i;

    jvmtiEvent curr;

    bool result = true;

    int *currentCounts;

    int isExpected = 0;

    switch (step) {

        case 1:

            currentCounts = &eventCount[0];

            break;

        case 2:

        case 3:

            currentCounts = &newEventCount[0];

            break;

        default:

            NSK_COMPLAIN1("Unexpected step no: %d\n", step);

            return false;

    }

    for (i = 0; i < JVMTI_EVENT_COUNT; i++) {

        curr = (jvmtiEvent) (i + JVMTI_MIN_EVENT_TYPE_VAL);

        switch (step) {

            case 1:

                isExpected = ((curr == JVMTI_EVENT_VM_INIT)

                                || (curr == JVMTI_EVENT_METHOD_ENTRY)

                                || (curr == JVMTI_EVENT_METHOD_EXIT));

                break;

            case 2:

                isExpected = ((curr == JVMTI_EVENT_METHOD_ENTRY)

                                || (curr == JVMTI_EVENT_METHOD_EXIT));

                break;

            case 3:

                isExpected = (curr == JVMTI_EVENT_VM_DEATH);

                break;

        }

        if (isExpected) {

            if (curr == JVMTI_EVENT_VM_INIT || curr == JVMTI_EVENT_VM_DEATH) {

                if (currentCounts[i] < 1) {

                        NSK_COMPLAIN2("Unexpected events number %7d for %s\n\texpected value must be greater than 1\n",

                                            currentCounts[i],

                                            TranslateEvent(curr));

                    result = false;

                }

            } else {

                if (currentCounts[i] != NUMBER_OF_INVOCATIONS) {

                    NSK_COMPLAIN3("Unexpected number of %s events %d, expected value is %d\n",

                                        TranslateEvent(curr),

                                        currentCounts[i],

                                        NUMBER_OF_INVOCATIONS);

                    result = false;

                }

            }

        } else {

            if (currentCounts[i] > 0) {

                NSK_COMPLAIN2("Unexpected event %s was sent %d times\n",

                                    TranslateEvent(curr),

                                    currentCounts[i]);

                result = false;

            }

        }

    }

    return result;

}

static void

changeCount(jvmtiEvent event, int *currentCounts) {

    if (!NSK_JVMTI_VERIFY(jvmti->RawMonitorEnter(syncLock)))

        nsk_jvmti_setFailStatus();

    currentCounts[event - JVMTI_MIN_EVENT_TYPE_VAL]++;

    if (!NSK_JVMTI_VERIFY(jvmti->RawMonitorExit(syncLock)))

        nsk_jvmti_setFailStatus();

}

/* ============================================================================= */

/* callbacks */

JNIEXPORT void JNICALL

cbVMInit(jvmtiEnv* jvmti, JNIEnv* jni_env, jthread thread) {

    changeCount(JVMTI_EVENT_VM_INIT, &eventCount[0]);

}

JNIEXPORT void JNICALL

cbVMDeath(jvmtiEnv* jvmti, JNIEnv* jni_env) {

    changeCount(JVMTI_EVENT_VM_DEATH, &newEventCount[0]);

    showEventStatistics(STEP_NUMBER);

    if (!checkEvents(STEP_NUMBER))

        nsk_jvmti_setFailStatus();

    if (!NSK_JVMTI_VERIFY(jvmti->DestroyRawMonitor(syncLock)))

        nsk_jvmti_setFailStatus();

}

void JNICALL

cbException(jvmtiEnv *jvmti_env, JNIEnv* jni_env, jthread thread,

                jmethodID method, jlocation location, jobject exception,

                jmethodID catch_method, jlocation catch_location) {

    changeCount(JVMTI_EVENT_EXCEPTION, &eventCount[0]);

}

void JNICALL

cbExceptionCatch(jvmtiEnv *jvmti_env, JNIEnv* jni_env, jthread thread,

                jmethodID method, jlocation location, jobject exception) {

    changeCount(JVMTI_EVENT_EXCEPTION_CATCH, &eventCount[0]);

}

void JNICALL

cbSingleStep(jvmtiEnv *jvmti_env, JNIEnv* jni_env, jthread thread,

                jmethodID method, jlocation location) {

    changeCount(JVMTI_EVENT_SINGLE_STEP, &eventCount[0]);

}

void JNICALL

cbFramePop(jvmtiEnv *jvmti_env, JNIEnv* jni_env, jthread thread,

                jmethodID method, jboolean was_popped_by_exception) {

    changeCount(JVMTI_EVENT_FRAME_POP, &eventCount[0]);

}

void JNICALL

cbBreakpoint(jvmtiEnv *jvmti_env, JNIEnv* jni_env, jthread thread,

                jmethodID method, jlocation location) {

    changeCount(JVMTI_EVENT_BREAKPOINT, &eventCount[0]);

}

void JNICALL

cbFieldAccess(jvmtiEnv *jvmti_env, JNIEnv* jni_env, jthread thread,

                jmethodID method, jlocation location, jclass field_klass,

                jobject object, jfieldID field) {

    changeCount(JVMTI_EVENT_FIELD_ACCESS, &eventCount[0]);

}

void JNICALL

cbFieldModification(jvmtiEnv *jvmti_env, JNIEnv* jni_env, jthread thread,

                jmethodID method, jlocation location, jclass field_klass,

                jobject object, jfieldID field, char signature_type,

                jvalue new_value) {

    changeCount(JVMTI_EVENT_FIELD_MODIFICATION, &eventCount[0]);

}

void handler1(jvmtiEnv *jvmti_env, jvmtiEvent event, jmethodID method) {

    char *name;

    char *sign;

    char *genc;

    if (!NSK_JVMTI_VERIFY(jvmti_env->GetMethodName(method, &name, &sign, &genc))) {

        nsk_jvmti_setFailStatus();

        return;

    }

    if (!strncmp(name,"javaMethod", 8)) {

        changeCount(event, &eventCount[0]);

    }

    if (!NSK_JVMTI_VERIFY(jvmti_env->Deallocate((unsigned char*)name))) {

        nsk_jvmti_setFailStatus();

    }

    if (!NSK_JVMTI_VERIFY(jvmti_env->Deallocate((unsigned char*)sign))) {

        nsk_jvmti_setFailStatus();

    }

    if (genc != NULL)

        if (!NSK_JVMTI_VERIFY(jvmti_env->Deallocate((unsigned char*)genc))) {

            nsk_jvmti_setFailStatus();

        }

}

void JNICALL

cbMethodEntry(jvmtiEnv *jvmti_env, JNIEnv* jni_env, jthread thread,

                jmethodID method) {

    handler1(jvmti_env, JVMTI_EVENT_METHOD_ENTRY, method);

}

void JNICALL

cbMethodExit(jvmtiEnv *jvmti_env, JNIEnv* jni_env, jthread thread,

                jmethodID method, jboolean was_popped_by_exception,

                jvalue return_value) {

    handler1(jvmti_env, JVMTI_EVENT_METHOD_EXIT, method);

}

void handler2(jvmtiEnv *jvmti_env, jvmtiEvent event, jmethodID method) {

    char *name;

    char *sign;

    char *genc;

    if (!NSK_JVMTI_VERIFY(jvmti_env->GetMethodName(method, &name, &sign, &genc))) {

        nsk_jvmti_setFailStatus();

        return;

    }

    if (!strncmp(name,"javaMethod", 8)) {

        changeCount(event, &newEventCount[0]);

    }

    if (!NSK_JVMTI_VERIFY(jvmti_env->Deallocate((unsigned char*)name))) {

        nsk_jvmti_setFailStatus();

    }

    if (!NSK_JVMTI_VERIFY(jvmti_env->Deallocate((unsigned char*)sign))) {

        nsk_jvmti_setFailStatus();

    }

    if (genc != NULL)

        if (!NSK_JVMTI_VERIFY(jvmti_env->Deallocate((unsigned char*)genc))) {

            nsk_jvmti_setFailStatus();

        }

}

void JNICALL

cbNewMethodEntry(jvmtiEnv *jvmti_env, JNIEnv* jni_env, jthread thread,

                jmethodID method) {

    handler2(jvmti_env, JVMTI_EVENT_METHOD_ENTRY, method);

}

void JNICALL

cbNewMethodExit(jvmtiEnv *jvmti_env, JNIEnv* jni_env, jthread thread,

                jmethodID method, jboolean was_popped_by_exception,

                jvalue return_value) {

    handler2(jvmti_env, JVMTI_EVENT_METHOD_EXIT, method);

}

void JNICALL

cbNativeMethodBind(jvmtiEnv *jvmti_env, JNIEnv* jni_env,jthread thread,

                jmethodID method, void* address, void** new_address_ptr) {

    changeCount(JVMTI_EVENT_NATIVE_METHOD_BIND, &eventCount[0]);

}

void JNICALL

cbMonitorWait(jvmtiEnv *jvmti_env, JNIEnv* jni_env, jthread thread,

                    jobject object, jlong tout) {

    changeCount(JVMTI_EVENT_MONITOR_WAIT, &eventCount[0]);

}

void JNICALL

cbMonitorWaited(jvmtiEnv *jvmti_env, JNIEnv* jni_env, jthread thread,

                    jobject object, jboolean timed_out) {

    changeCount(JVMTI_EVENT_MONITOR_WAITED, &eventCount[0]);

}

JNIEXPORT void JNICALL

cbMonitorContendedEnter(jvmtiEnv* jvmti, JNIEnv* jni_env, jthread thread,

                            jobject object) {

    changeCount(JVMTI_EVENT_MONITOR_CONTENDED_ENTER, &eventCount[0]);

}

void JNICALL

cbMonitorContendedEntered(jvmtiEnv *jvmti_env, JNIEnv* jni_env, jthread thread,

                            jobject object) {

    changeCount(JVMTI_EVENT_MONITOR_CONTENDED_ENTERED, &eventCount[0]);

}

void JNICALL

cbCompiledMethodLoad(jvmtiEnv *jvmti_env, jmethodID method, jint code_size,

                const void* code_addr, jint map_length,

                const jvmtiAddrLocationMap* map, const void* compile_info) {

    changeCount(JVMTI_EVENT_COMPILED_METHOD_LOAD, &eventCount[0]);

}

void JNICALL

cbCompiledMethodUnload(jvmtiEnv *jvmti_env, jmethodID method,

                const void* code_addr) {

    changeCount(JVMTI_EVENT_COMPILED_METHOD_UNLOAD, &eventCount[0]);

}

void JNICALL

cbGarbageCollectionStart(jvmtiEnv *jvmti_env) {

    changeCount(JVMTI_EVENT_GARBAGE_COLLECTION_START, &eventCount[0]);

}

void JNICALL

cbGarbageCollectionFinish(jvmtiEnv *jvmti_env) {

    changeCount(JVMTI_EVENT_GARBAGE_COLLECTION_FINISH, &eventCount[0]);

}

void JNICALL

cbObjectFree(jvmtiEnv *jvmti_env, jlong tag) {

    changeCount(JVMTI_EVENT_OBJECT_FREE, &eventCount[0]);

}

void JNICALL

cbVMObjectAlloc(jvmtiEnv *jvmti_env, JNIEnv* jni_env, jthread thread,

                    jobject object, jclass object_klass, jlong size) {

    changeCount(JVMTI_EVENT_VM_OBJECT_ALLOC, &eventCount[0]);

}

/* ============================================================================= */

static bool enableEvent(jvmtiEvent event) {

    if (nsk_jvmti_isOptionalEvent(event)

            && (event != JVMTI_EVENT_METHOD_ENTRY)

            && (event != JVMTI_EVENT_METHOD_EXIT)) {

        if (!NSK_JVMTI_VERIFY_CODE(JVMTI_ERROR_MUST_POSSESS_CAPABILITY,

                jvmti->SetEventNotificationMode(JVMTI_ENABLE, event, NULL))) {

            NSK_COMPLAIN1("Unexpected error enabling %s\n",

                TranslateEvent(event));

            return false;

        }

    } else {

        if (!NSK_JVMTI_VERIFY(jvmti->SetEventNotificationMode(JVMTI_ENABLE, event, NULL))) {

            NSK_COMPLAIN1("Unexpected error enabling %s\n",

                TranslateEvent(event));

            return false;

        }

    }

    return true;

}

/**

 * Enable or disable tested events.

 */

static bool enableEventList() {

    int i, result;

    result = enableEvent(JVMTI_EVENT_VM_INIT);

    result = result && enableEvent(JVMTI_EVENT_VM_DEATH);

    /* enabling optional events */

    for (i = 0; i < JVMTI_EVENT_COUNT; i++) {

        jvmtiEvent event = (jvmtiEvent)(i+JVMTI_MIN_EVENT_TYPE_VAL);

        if (nsk_jvmti_isOptionalEvent(event))

            result = result && enableEvent(event);

    }

    if (!result) {

        nsk_jvmti_setFailStatus();

        return false;

    }

    return true;

}

/* ============================================================================= */

static bool setCallBacks(int step) {

    int i;

    jvmtiEventCallbacks eventCallbacks;

    memset(&eventCallbacks, 0, sizeof(eventCallbacks));

    switch (step) {

        case 1:

            for (i = 0; i < JVMTI_EVENT_COUNT; i++) {

                eventCount[i] = 0;

            }

            eventCallbacks.VMInit                    = cbVMInit;

            eventCallbacks.Exception                 = cbException;

            eventCallbacks.ExceptionCatch            = cbExceptionCatch;

            eventCallbacks.SingleStep                = cbSingleStep;

            eventCallbacks.FramePop                  = cbFramePop;

            eventCallbacks.Breakpoint                = cbBreakpoint;

            eventCallbacks.FieldAccess               = cbFieldAccess;

            eventCallbacks.FieldModification         = cbFieldModification;

            eventCallbacks.MethodEntry               = cbMethodEntry;

            eventCallbacks.MethodExit                = cbMethodExit;

            eventCallbacks.NativeMethodBind          = cbNativeMethodBind;

            eventCallbacks.CompiledMethodLoad        = cbCompiledMethodLoad;

            eventCallbacks.CompiledMethodUnload      = cbCompiledMethodUnload;

            eventCallbacks.MonitorWait               = cbMonitorWait;

            eventCallbacks.MonitorWaited             = cbMonitorWaited;

            eventCallbacks.MonitorContendedEnter     = cbMonitorContendedEnter;

            eventCallbacks.MonitorContendedEntered   = cbMonitorContendedEntered;

            eventCallbacks.GarbageCollectionStart    = cbGarbageCollectionStart;

            eventCallbacks.GarbageCollectionFinish   = cbGarbageCollectionFinish;

            eventCallbacks.ObjectFree                = cbObjectFree;

            eventCallbacks.VMObjectAlloc             = cbVMObjectAlloc;

            break;

        case 2:

            for (i = 0; i < JVMTI_EVENT_COUNT; i++) {

                newEventCount[i] = 0;

            }

            eventCallbacks.MethodEntry               = cbNewMethodEntry;

            eventCallbacks.MethodExit                = cbNewMethodExit;

            break;

        case 3:

            for (i = 0; i < JVMTI_EVENT_COUNT; i++) {

                newEventCount[i] = 0;

            }

            eventCallbacks.VMDeath                   = cbVMDeath;

            break;

    }

    if (!NSK_JVMTI_VERIFY(jvmti->SetEventCallbacks(&eventCallbacks, sizeof(eventCallbacks))))

        return false;

    return true;

}

/* ============================================================================= */

/** Agent algorithm. */

static void JNICALL

agentProc(jvmtiEnv* jvmti, JNIEnv* agentJNI, void* arg) {

    int i;

    for (i = 1; i <= STEP_NUMBER; i++) {

        if (!nsk_jvmti_waitForSync(timeout))

            return;

        if (i < STEP_NUMBER) {

            showEventStatistics(i);

            if (!checkEvents(i))

                nsk_jvmti_setFailStatus();

            if (!setCallBacks(i + 1)) {

                return;

            }

        }

        if (!nsk_jvmti_resumeSync())

            return;

    }

}

/* ============================================================================= */