获取Linux中Java线程的线程ID

Answer 1

最后，我发现JNI方法是解决我的问题的最好方法。作为参考，我发布了代码并为其构建说明（基于Wikipedia上的示例）：

负责与C代码接口的Java类(getThreadId.Java):

public class GetThreadID {
    public static native int get_tid();

    static {
        System.loadLibrary("GetThreadID");
    }
}

负责获取线程ID的C文件(getThread.C):

#include <jni.h>
#include <syscall.h>
#include "GetThreadID.h"

JNIEXPORT jint JNICALL
Java_GetThreadID_get_1tid(JNIEnv *env, jobject obj) {
    jint tid = syscall(__NR_gettid);
    return tid;
}

class Main {
    public static void main(String[] args) {
        int tid = GetThreadID.get_tid();
        System.out.println("TID=" + tid);
    }
}

JAVA_HOME=$(readlink -f /usr/bin/javac | sed "s:bin/javac::")
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:.
javac GetThreadID.java
javah GetThreadID

gcc -I${JAVA_HOME}/include -fPIC -shared GetThreadID.c -o libGetThreadID.so
javac Main.java
java Main