/*

 * 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 <stdlib.h>

#include "jvmti.h"

#include "agent_common.h"

#include "JVMTITools.h"

extern "C" {

#define STATUS_FAILED 2

#define PASSED 0

static jvmtiEnv *jvmti;

static jvmtiCapabilities caps;

static jvmtiEventCallbacks callbacks;

static int watch_ev = 0;        /* ignore JVMTI events by default */

static int gen_ev = 0;          /* number of generated events */

static int popDone = 0;         /* 1- if PopFrame() is already done */

static int tot_result = PASSED; /* total result of the test */

static jrawMonitorID watch_ev_monitor;

static void set_watch_ev(int value) {

    jvmti->RawMonitorEnter(watch_ev_monitor);

    watch_ev = value;

    jvmti->RawMonitorExit(watch_ev_monitor);

}

void JNICALL

FramePop(jvmtiEnv *jvmti_env, JNIEnv *env, jthread thread,

        jmethodID method, jboolean wasPopedByException) {

    jvmti->RawMonitorEnter(watch_ev_monitor);

    if (watch_ev) {

        printf("#### FramePop event occurred ####\n");

        gen_ev++;

    }

    jvmti->RawMonitorExit(watch_ev_monitor);

}

void JNICALL

MethodExit(jvmtiEnv *jvmti_env, JNIEnv *env, jthread thr,

        jmethodID method, jboolean was_poped_by_exc, jvalue return_value) {

    jvmti->RawMonitorEnter(watch_ev_monitor);

    if (watch_ev) {

        printf("#### MethodExit event occurred ####\n");

        gen_ev++;

    }

    jvmti->RawMonitorExit(watch_ev_monitor);

}

int suspThread(jint vrb, jobject susThr) {

    jvmtiError err;

    if (!caps.can_pop_frame || !caps.can_suspend) {

        return PASSED;

    }

    if (vrb == 1) {

        printf(">>>>>>>> Invoke SuspendThread()\n");

        fflush(stdout);

    }

        printf("%s: Failed to call SuspendThread(): error=%d: %s\n",

            __FILE__, err, TranslateError(err));

        return JNI_ERR;

    }

    if (vrb == 1) {

        printf("<<<<<<<< SuspendThread() is successfully done\n");

        fflush(stdout);

    }

    return PASSED;

}

int resThread(jint vrb, jobject susThr) {

    jvmtiError err;

    if (!caps.can_pop_frame || !caps.can_suspend) {

        return PASSED;

    }

    if (vrb == 1) {

        printf(">>>>>>>> Invoke ResumeThread()\n");

        fflush(stdout);

    }

        printf("%s: Failed to call ResumeThread(): error=%d: %s\n",

            __FILE__, err, TranslateError(err));

        return JNI_ERR;

    }

    if (vrb == 1) {

        printf("<<<<<<<< ResumeThread() is successfully done\n");

        fflush(stdout);

    }

    return PASSED;

}

JNIEXPORT jint JNICALL

Java_nsk_jvmti_PopFrame_popframe004_doPopFrame(JNIEnv *env, jclass cls, jint t_case,

        jobject frameThr) {

    jvmtiError err;

    if (popDone) return PASSED;

    if (!caps.can_pop_frame || !caps.can_suspend) {

        return PASSED;

    }

    if (t_case <= 1) /* we are in a different thread */

        if (suspThread(t_case, frameThr) != PASSED)

            return STATUS_FAILED;

    err = jvmti->SetEventNotificationMode(JVMTI_ENABLE,

        JVMTI_EVENT_METHOD_EXIT, frameThr);

    if (err != JVMTI_ERROR_NONE) {

        printf("Failed to enable METHOD_EXIT event: %s (%d)\n",

               TranslateError(err), err);

        tot_result = STATUS_FAILED;

    }

    err = jvmti->SetEventNotificationMode(JVMTI_ENABLE,

        JVMTI_EVENT_FRAME_POP, frameThr);

    if (err != JVMTI_ERROR_NONE) {

        printf("Failed to enable FRAME_POP event: %s (%d)\n",

               TranslateError(err), err);

        tot_result = STATUS_FAILED;

    }

    if (t_case & 1) {

        printf(">>>>>>>> Invoke PopFrame()\n");

        fflush(stdout);

    }

    set_watch_ev(1); /* watch JVMTI events */

        printf("Check #%d FAILED: PopFrame() was unexpectedly done\n", t_case);

        tot_result = STATUS_FAILED;

    } else if (err != JVMTI_ERROR_NO_MORE_FRAMES &&

               err != JVMTI_ERROR_OPAQUE_FRAME) {

        printf("Check #%d FAILED: PopFrame() returned unexpected error %d: %s\n",

            t_case, err, TranslateError(err));

        printf("\tFor more info about this error please refer to the JVMTI spec.\n");

        tot_result = STATUS_FAILED;

    } else if (t_case & 1) {

        printf("Check #%d PASSED: PopFrame() failed as expected with %d: %s\n",

            t_case, err, TranslateError(err));

        fflush(stdout);

    }

    set_watch_ev(0); /* ignore again JVMTI events */

    if (gen_ev) {

        printf("TEST FAILED: %d JVMTI events were generated by the function PopFrame()\n",

            gen_ev);

        tot_result = STATUS_FAILED;

    } else if (t_case & 1) {

        printf("Check #%d PASSED: No JVMTI events were generated by the function PopFrame()\n",

            t_case+1);

        fflush(stdout);

    }

    if (t_case <= 1) /* we are in a different thread */

        return resThread(t_case, frameThr);

    else popDone = 1; /* stop looping */

    return PASSED;

}

#ifdef STATIC_BUILD

JNIEXPORT jint JNICALL Agent_OnLoad_popframe004(JavaVM *jvm, char *options, void *reserved) {

    return Agent_Initialize(jvm, options, reserved);

}

JNIEXPORT jint JNICALL Agent_OnAttach_popframe004(JavaVM *jvm, char *options, void *reserved) {

    return Agent_Initialize(jvm, options, reserved);

}

JNIEXPORT jint JNI_OnLoad_popframe004(JavaVM *jvm, char *options, void *reserved) {

    return JNI_VERSION_1_8;

}

#endif

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

    jint res;

    jvmtiError err;

    res = jvm->GetEnv((void **) &jvmti, JVMTI_VERSION_1_1);

    if (res != JNI_OK || jvmti == NULL) {

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

        return JNI_ERR;

    }

    err = jvmti->GetPotentialCapabilities(&caps);

    if (err != JVMTI_ERROR_NONE) {

        printf("(GetPotentialCapabilities) unexpected error: %s (%d)\n",

               TranslateError(err), err);

        return JNI_ERR;

    }

    err = jvmti->AddCapabilities(&caps);

    if (err != JVMTI_ERROR_NONE) {

        printf("(AddCapabilities) unexpected error: %s (%d)\n",

               TranslateError(err), err);

        return JNI_ERR;

    }

    err = jvmti->GetCapabilities(&caps);

    if (err != JVMTI_ERROR_NONE) {

        printf("(GetCapabilities) unexpected error: %s (%d)\n",

               TranslateError(err), err);

        return JNI_ERR;

    }

    if (!caps.can_pop_frame) {

        printf("Warning: PopFrame is not implemented\n");

        return JNI_OK;

    }

    if (!caps.can_suspend) {

        printf("Warning: suspend/resume is not implemented\n");

        return JNI_OK;

    }

    if (caps.can_generate_frame_pop_events &&

            caps.can_generate_method_exit_events) {

        callbacks.MethodExit = &MethodExit;

        callbacks.FramePop = &FramePop;

        err = jvmti->SetEventCallbacks(&callbacks, sizeof(callbacks));

        if (err != JVMTI_ERROR_NONE) {

            printf("(SetEventCallbacks) unexpected error: %s (%d)\n",

                   TranslateError(err), err);

            return JNI_ERR;

        }

    } else {

        printf("Warning: FramePop or MethodExit event is not implemented\n");

    }

    err = jvmti->CreateRawMonitor("watch_ev_monitor", &watch_ev_monitor);

    if (err != JVMTI_ERROR_NONE) {

        printf("(CreateRawMonitor) unexpected error: %s (%d)\n",

               TranslateError(err), err);

        return JNI_ERR;

    }

    return JNI_OK;

}

JNIEXPORT jint JNICALL

Java_nsk_jvmti_PopFrame_popframe004_getResult(JNIEnv *env, jclass cls) {

    return (tot_result);

}

void nativeMeth2(JNIEnv *env, jobject obj, jint vrb,

        jobject frameThr) {

    jclass cls = env->GetObjectClass(frameThr);

    jmethodID mid = NULL;

        printf("TEST FAILURE: nativeMeth2(): Unable to get method ID\n");

        tot_result = STATUS_FAILED;

        return;

    }

    if (vrb ==1) {

        printf("nativeMeth2(): calling the Java activeMethod()\n");

        fflush(stdout);

    }

    env->CallVoidMethod(frameThr, mid);

}

JNIEXPORT void JNICALL

Java_nsk_jvmti_PopFrame_popframe004_nativeMeth(JNIEnv *env, jobject obj, jint vrb,

        jobject frameThr) {

    if (vrb ==1) {

        printf("nativeMeth(): calling the native nativeMeth2()\n");

        fflush(stdout);

    }

    nativeMeth2(env, obj, vrb, frameThr);

}

}