jvm-07-JVM的启动

找到启动JVM的代码在哪儿

grep -Rn "JVMInit("

这个调用链路是

• 1 java_md.c#JVMInit
• 2 java.c#ContinueInNewThread
• 3 java_md.c#CallJavaMainInNewThread
• 4 java_md.c#ThreadJavaMain 线程的调度被调度起来会执行的函数
• 5 java.c#JavaMain jvm-08-JavaMain干了什么

// 系统调用创建线程 CPU调度到ThreadJavaMain函数
if (pthread_create(&tid, &attr, ThreadJavaMain, args) == 0) {
    void* tmp;
    /**
     * cur thread will be blocked here, how to terminate thread, it will terminate in one of following ways:
     * 1 It calls pthread_exit(3), specifying an exit status value that is available to another thread in the same process that calls pthread_join(3).
     * 2 It  returns  from start_routine().  This is equivalent to calling pthread_exit(3) with the value supplied in the return statement.
     * 3 It is canceled (see pthread_cancel(3)).
     * 4 Any of the threads in the process calls exit(3), or the main thread performs a return from main(). This causes the termination of all threads in the process.
     */
    // 当前线程阻塞在这里
    pthread_join(tid, &tmp);

static void* ThreadJavaMain(void* args) {
    return (void*)(intptr_t)JavaMain(args);
}