| /* |
| * Copyright (c) 2004, 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 <stdlib.h> |
| #include <string.h> |
| #include "jni_tools.h" |
| #include "agent_common.h" |
| #include "jvmti_tools.h" |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| typedef struct { |
| jthread thread; |
| char* name; |
| int dfn; |
| } threadDesc; |
| |
| /* ========================================================================== */ |
| |
| /* scaffold objects */ |
| static jlong timeout = 0; |
| |
| /* test objects */ |
| static threadDesc *threadList = NULL; |
| static jint threads_count = 0; |
| static int numberOfDeadlocks = 0; |
| |
| /* ========================================================================== */ |
| |
| static int printDeadlock(jvmtiEnv* jvmti, JNIEnv* jni, int dThread) { |
| jobject monitor = NULL; |
| jclass klass = NULL; |
| jvmtiMonitorUsage usageInfo; |
| int pThread, cThread; |
| char* name; |
| |
| NSK_DISPLAY1("Found deadlock #%d:\n", numberOfDeadlocks); |
| for (pThread = dThread;;pThread = cThread) { |
| NSK_DISPLAY1(" \"%s\":\n", threadList[pThread].name); |
| if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB3(GetCurrentContendedMonitor, |
| jvmti, threadList[pThread].thread, &monitor))) |
| return NSK_FALSE; |
| if (monitor != NULL) { |
| if (!NSK_JNI_VERIFY(jni, (klass = |
| NSK_CPP_STUB2(GetObjectClass, jni, monitor)) != NULL)) |
| return NSK_FALSE; |
| if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB4( |
| GetClassSignature, jvmti, klass, &name, NULL))) |
| return NSK_FALSE; |
| NSK_DISPLAY2(" waiting to lock %p (%s),\n", monitor, name); |
| NSK_CPP_STUB2(Deallocate, jvmti, (unsigned char*)name); |
| } else { |
| NSK_DISPLAY0(" (JVMTI raw monitor),\n"); |
| } |
| if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB3(GetObjectMonitorUsage, |
| jvmti, monitor, &usageInfo))) |
| return NSK_FALSE; |
| if (usageInfo.owner == NULL) |
| break; |
| for (cThread = 0; cThread < threads_count; cThread++) { |
| if (NSK_CPP_STUB3(IsSameObject, jni, |
| threadList[cThread].thread, usageInfo.owner)) |
| break; |
| } |
| if (usageInfo.waiters != NULL) { |
| NSK_CPP_STUB2(Deallocate, jvmti, |
| (unsigned char*)usageInfo.waiters); |
| } |
| if (usageInfo.notify_waiters != NULL) { |
| NSK_CPP_STUB2(Deallocate, jvmti, |
| (unsigned char*)usageInfo.notify_waiters); |
| } |
| if (!NSK_VERIFY(cThread != threads_count)) |
| return NSK_FALSE; |
| NSK_DISPLAY1(" which is held by \"%s\"\n", |
| threadList[cThread].name); |
| if (cThread == dThread) |
| break; |
| } |
| |
| return NSK_TRUE; |
| } |
| |
| static int findDeadlockThreads(jvmtiEnv* jvmti, JNIEnv* jni) { |
| jvmtiThreadInfo info; |
| jthread *threads = NULL; |
| jobject monitor = NULL; |
| jvmtiMonitorUsage usageInfo; |
| int tDfn = 0, gDfn = 0; |
| int pThread, cThread; |
| int i; |
| |
| NSK_DISPLAY0("Create threadList\n"); |
| |
| /* get all live threads */ |
| if (!NSK_JVMTI_VERIFY( |
| NSK_CPP_STUB3(GetAllThreads, jvmti, &threads_count, &threads))) |
| return NSK_FALSE; |
| |
| if (!NSK_VERIFY(threads_count > 0 && threads != NULL)) |
| return NSK_FALSE; |
| |
| if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB3(Allocate, jvmti, |
| threads_count*sizeof(threadDesc), (unsigned char**)&threadList))) |
| return NSK_FALSE; |
| |
| for (i = 0; i < threads_count; i++) { |
| if (!NSK_VERIFY(threads[i] != NULL)) |
| return NSK_FALSE; |
| |
| /* get thread information */ |
| if (!NSK_JVMTI_VERIFY( |
| NSK_CPP_STUB3(GetThreadInfo, jvmti, threads[i], &info))) |
| return NSK_FALSE; |
| |
| NSK_DISPLAY3(" thread #%d (%s): %p\n", i, info.name, threads[i]); |
| |
| threadList[i].thread = threads[i]; |
| threadList[i].dfn = -1; |
| threadList[i].name = info.name; |
| } |
| |
| /* deallocate thread list */ |
| if (!NSK_JVMTI_VERIFY( |
| NSK_CPP_STUB2(Deallocate, jvmti, (unsigned char*)threads))) |
| return NSK_FALSE; |
| |
| for (i = 0; i < threads_count; i++) { |
| if (threadList[i].dfn < 0) { |
| tDfn = gDfn; |
| threadList[i].dfn = gDfn++; |
| for (pThread = i;;pThread = cThread) { |
| if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB3(GetCurrentContendedMonitor, |
| jvmti, threadList[pThread].thread, &monitor))) |
| return NSK_FALSE; |
| if (monitor == NULL) |
| break; |
| if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB3(GetObjectMonitorUsage, |
| jvmti, monitor, &usageInfo))) |
| return NSK_FALSE; |
| if (usageInfo.owner == NULL) |
| break; |
| for (cThread = 0; cThread < threads_count; cThread++) { |
| if (NSK_CPP_STUB3(IsSameObject, jni, |
| threadList[cThread].thread, usageInfo.owner)) |
| break; |
| } |
| if (usageInfo.waiters != NULL) { |
| NSK_CPP_STUB2(Deallocate, jvmti, |
| (unsigned char*)usageInfo.waiters); |
| } |
| if (usageInfo.notify_waiters != NULL) { |
| NSK_CPP_STUB2(Deallocate, jvmti, |
| (unsigned char*)usageInfo.notify_waiters); |
| } |
| if (!NSK_VERIFY(cThread != threads_count)) |
| return NSK_FALSE; |
| if (threadList[cThread].dfn < 0) { |
| threadList[cThread].dfn = gDfn++; |
| } else if (cThread == pThread) { |
| break; |
| } else { |
| numberOfDeadlocks++; |
| if (nsk_getVerboseMode()) { |
| if (!printDeadlock(jvmti, jni, cThread)) |
| return NSK_FALSE; |
| } |
| break; |
| } |
| } |
| } |
| } |
| |
| /* deallocate thread names */ |
| for (i = 0; i < threads_count; i++) { |
| if (threadList[i].name != NULL) { |
| if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2( |
| Deallocate, jvmti, (unsigned char*)threadList[i].name))) |
| return NSK_FALSE; |
| } |
| } |
| |
| return NSK_TRUE; |
| } |
| |
| /* ========================================================================== */ |
| |
| /* agent algorithm */ |
| static void JNICALL |
| agentProc(jvmtiEnv* jvmti, JNIEnv* jni, void* arg) { |
| |
| /* wait for initial sync */ |
| if (!nsk_jvmti_waitForSync(timeout)) |
| return; |
| |
| if (!findDeadlockThreads(jvmti, jni)) { |
| nsk_jvmti_setFailStatus(); |
| return; |
| } |
| |
| NSK_DISPLAY1("Total deadlocks found: %d\n", numberOfDeadlocks); |
| if (!NSK_VERIFY(numberOfDeadlocks > 0)) |
| nsk_jvmti_setFailStatus(); |
| |
| /* resume debugee after last sync */ |
| if (!nsk_jvmti_resumeSync()) |
| return; |
| } |
| |
| /* ========================================================================== */ |
| |
| /* agent library initialization */ |
| #ifdef STATIC_BUILD |
| JNIEXPORT jint JNICALL Agent_OnLoad_tc03t002(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| JNIEXPORT jint JNICALL Agent_OnAttach_tc03t002(JavaVM *jvm, char *options, void *reserved) { |
| return Agent_Initialize(jvm, options, reserved); |
| } |
| JNIEXPORT jint JNI_OnLoad_tc03t002(JavaVM *jvm, char *options, void *reserved) { |
| return JNI_VERSION_1_8; |
| } |
| #endif |
| jint Agent_Initialize(JavaVM *jvm, char *options, void *reserved) { |
| jvmtiEnv* jvmti = NULL; |
| jvmtiCapabilities caps; |
| |
| /* init framework and parse options */ |
| if (!NSK_VERIFY(nsk_jvmti_parseOptions(options))) |
| return JNI_ERR; |
| |
| timeout = nsk_jvmti_getWaitTime() * 60000; |
| NSK_DISPLAY1("Timeout: %d msc\n", (int)timeout); |
| |
| /* create JVMTI environment */ |
| if (!NSK_VERIFY((jvmti = |
| nsk_jvmti_createJVMTIEnv(jvm, reserved)) != NULL)) |
| return JNI_ERR; |
| |
| /* add capabilities */ |
| memset(&caps, 0, sizeof(caps)); |
| caps.can_get_current_contended_monitor = 1; |
| caps.can_get_monitor_info = 1; |
| if (!NSK_JVMTI_VERIFY(NSK_CPP_STUB2(AddCapabilities, jvmti, &caps))) |
| return JNI_ERR; |
| |
| /* register agent proc and arg */ |
| if (!NSK_VERIFY(nsk_jvmti_setAgentProc(agentProc, NULL))) |
| return JNI_ERR; |
| |
| return JNI_OK; |
| } |
| |
| /* ========================================================================== */ |
| |
| #ifdef __cplusplus |
| } |
| #endif |
