/* * 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 #include "jvmti.h" #include "agent_common.h" #include "jni_tools.h" #include "jvmti_tools.h" extern "C" { /* ============================================================================= */ /* scaffold objects */ static jlong timeout = 0; /* constant names */ #define THREAD_NAME "TestedThread" #define N_LATE_CALLS 10000 /* ============================================================================= */ /** Agent algorithm. */ static void JNICALL agentProc(jvmtiEnv* jvmti, JNIEnv* jni, void* arg) { /* Original agentProc test block starts here: */ NSK_DISPLAY0("Wait for thread to start\n"); // SP2.1-n - notify agent is waiting and wait // SP3.1-w - wait to start test if (!nsk_jvmti_waitForSync(timeout)) return; /* perform testing */ { jthread testedThread = NULL; int late_count; NSK_DISPLAY1("Find thread: %s\n", THREAD_NAME); if (!NSK_VERIFY((testedThread = nsk_jvmti_threadByName(THREAD_NAME)) != NULL)) return; NSK_DISPLAY1(" ... found thread: %p\n", (void*)testedThread); NSK_DISPLAY1("Suspend thread: %p\n", (void*)testedThread); if (!NSK_JVMTI_VERIFY(jvmti->SuspendThread(testedThread))) { nsk_jvmti_setFailStatus(); return; } NSK_DISPLAY0("Let thread to run and finish\n"); // SP5.1-n - notify suspend done if (!nsk_jvmti_resumeSync()) return; NSK_DISPLAY1("Get state vector for thread: %p\n", (void*)testedThread); { jint state = 0; if (!NSK_JVMTI_VERIFY(jvmti->GetThreadState(testedThread, &state))) { nsk_jvmti_setFailStatus(); } NSK_DISPLAY2(" ... got state vector: %s (%d)\n", TranslateState(state), (int)state); if ((state & JVMTI_THREAD_STATE_SUSPENDED) == 0) { NSK_COMPLAIN2("SuspendThread() does not turn on flag SUSPENDED:\n" "# state: %s (%d)\n", TranslateState(state), (int)state); nsk_jvmti_setFailStatus(); } } NSK_DISPLAY1("Resume thread: %p\n", (void*)testedThread); if (!NSK_JVMTI_VERIFY(jvmti->ResumeThread(testedThread))) { nsk_jvmti_setFailStatus(); } /* Original agentProc test block ends here. */ /* * Using printf() instead of NSK_DISPLAY1() in this loop * in order to slow down the rate of SuspendThread() calls. */ for (late_count = 0; late_count < N_LATE_CALLS; late_count++) { jvmtiError l_err; printf("INFO: Late suspend thread: %p\n", (void*)testedThread); l_err = jvmti->SuspendThread(testedThread); if (l_err != JVMTI_ERROR_NONE) { printf("INFO: Late suspend thread err: %d\n", l_err); // testedThread has exited so we're done with late calls break; } // Only resume a thread if suspend worked. Using NSK_DISPLAY1() // here because we want ResumeThread() to be faster. NSK_DISPLAY1("INFO: Late resume thread: %p\n", (void*)testedThread); if (!NSK_JVMTI_VERIFY(jvmti->ResumeThread(testedThread))) { nsk_jvmti_setFailStatus(); } } printf("INFO: made %d late calls to JVM/TI SuspendThread()\n", late_count); printf("INFO: N_LATE_CALLS==%d value is %slarge enough to cause a " "SuspendThread() call after thread exit.\n", N_LATE_CALLS, (late_count == N_LATE_CALLS) ? "NOT " : ""); /* Second part of original agentProc test block starts here: */ NSK_DISPLAY0("Wait for thread to finish\n"); // SP4.1-n - notify agent is waiting and wait // SP6.1-w - wait to end test if (!nsk_jvmti_waitForSync(timeout)) return; NSK_DISPLAY0("Delete thread reference\n"); NSK_TRACE(jni->DeleteGlobalRef(testedThread)); } NSK_DISPLAY0("Let debugee to finish\n"); // SP7.1-n - notify agent end if (!nsk_jvmti_resumeSync()) return; /* Second part of original agentProc test block ends here. */ } /* ============================================================================= */ /** Agent library initialization. */ #ifdef STATIC_BUILD JNIEXPORT jint JNICALL Agent_OnLoad_suspendthrd003(JavaVM *jvm, char *options, void *reserved) { return Agent_Initialize(jvm, options, reserved); } JNIEXPORT jint JNICALL Agent_OnAttach_suspendthrd003(JavaVM *jvm, char *options, void *reserved) { return Agent_Initialize(jvm, options, reserved); } JNIEXPORT jint JNI_OnLoad_suspendthrd003(JavaVM *jvm, char *options, void *reserved) { return JNI_VERSION_1_8; } #endif jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) { jvmtiEnv* jvmti = NULL; /* init framework and parse options */ if (!NSK_VERIFY(nsk_jvmti_parseOptions(options))) return JNI_ERR; timeout = nsk_jvmti_getWaitTime() * 60 * 1000; /* create JVMTI environment */ if (!NSK_VERIFY((jvmti = nsk_jvmti_createJVMTIEnv(jvm, reserved)) != NULL)) return JNI_ERR; /* add specific capabilities for suspending thread */ { jvmtiCapabilities suspendCaps; memset(&suspendCaps, 0, sizeof(suspendCaps)); suspendCaps.can_suspend = 1; if (!NSK_JVMTI_VERIFY(jvmti->AddCapabilities(&suspendCaps))) return JNI_ERR; } /* register agent proc and arg */ if (!NSK_VERIFY(nsk_jvmti_setAgentProc(agentProc, NULL))) return JNI_ERR; return JNI_OK; } /* ============================================================================= */ }