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/*
 * @test
 *
 * @summary converted from VM Testbase nsk/jvmti/SetEventCallbacks/setevntcallb002.
 * VM Testbase keywords: [quick, jpda, jvmti, onload_only_logic, noras]
 * VM Testbase readme:
 * DESCRIPTION
 *     This JVMTI test exercises JVMTI thread function SetEventCallbacks().
 *     This test checks that if SetEventCallbacks() is invoked with NULL
 *     for event callbacks, then no events will be generated and no callbacks
 *     will be invoked.
 *     In Agent_OnLoad() the test sets event callbacks for VM_INIT,
 *     THREAD_START and THREAD_END events, but enables only VM_INIT event.
 *     In VM_INIT callback the test sets NULL for event callbacks and
 *     enables other events (THREAD_START and THREAD_END).
 *     The debuggee class starts and ends trivial thread to generate
 *     tested events. After thread completed, the test checks if no event
 *     callbacks were actually invoked.
 *     If callbacks for THREAD_START and THREAD_END events were not invoked,
 *     the test passes with exit status 95.
 *     If callback for VM_INIT event was not invoked or other error occur,
 *     the test fails with exit status 97.
 * COMMENTS
 *
 * @library /vmTestbase
 *          /test/lib
 * @run driver jdk.test.lib.FileInstaller . .
 * @run main/othervm/native
 *      -agentlib:setevntcallb002=-waittime=5
 *      nsk.jvmti.SetEventCallbacks.setevntcallb002
 */

