在StackOverflowError上自动重启JVM的最简单方法 [英] Simplest way to auto-restart a JVM on StackOverflowError

问题描述

似乎没有-XX选项可以在 StackOverflowError 上重新启动JVM.出现 StackOverflowError 时，自动重启JVM的最简单方法是什么?

It does not seem that there is a -XX option to restart a JVM on StackOverflowError. What is the simplest way to auto-restart a JVM when it gets a StackOverflowError?

推荐答案

HotSpot JVM具有内置的 -XX:AbortVMOnException = java.lang.StackOverflowError 选项，但不幸的是，该标志仅在调试JVM版本.

HotSpot JVM has built-in -XX:AbortVMOnException=java.lang.StackOverflowError option, but unfortunately this flag is available only in debug builds of JVM.

有效的解决方案是使用 JVM TI代理将拦截所有异常，并在异常属于指定类时中止该过程.这是此类代理的示例.

The working solution is to use JVM TI agent that will intercept all exceptions and abort the process whenever the exception belongs to the specified class. Here is an example of such agent.

#include <jvmti.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>

static const char* fatal_error_class;

void JNICALL ExceptionCallback(jvmtiEnv* jvmti, JNIEnv* env, jthread thread,
                               jmethodID method, jlocation location, jobject exception,
                               jmethodID catch_method, jlocation catch_location) {
    char* class_name;
    jclass exception_class = env->GetObjectClass(exception);
    jvmti->GetClassSignature(exception_class, &class_name, NULL);
    class_name[strlen(class_name) - 1] = 0;

    if (strcmp(class_name + 1, fatal_error_class) == 0) {
        printf("Abort on fatal error\n");
        exit(1);
    }

    jvmti->Deallocate((unsigned char*)class_name);
}

extern "C" JNIEXPORT jint JNICALL Agent_OnLoad(JavaVM* vm, char* options, void* unused) {
    if (options == NULL || options[0] == 0) {
        printf("Usage: -agentpath:/path/to/libabort.so=java/lang/StackOverflowError\n");
        return 1;
    }

    fatal_error_class = strdup(options);

    jvmtiEnv* jvmti;
    vm->GetEnv((void**)&jvmti, JVMTI_VERSION_1_0);

    jvmtiCapabilities capabilities = {0};
    capabilities.can_generate_exception_events = 1;
    jvmti->AddCapabilities(&capabilities);

    jvmtiEventCallbacks callbacks = {0};
    callbacks.Exception = ExceptionCallback;
    jvmti->SetEventCallbacks(&callbacks, sizeof(callbacks));
    jvmti->SetEventNotificationMode(JVMTI_ENABLE, JVMTI_EVENT_EXCEPTION, NULL);

    return 0;
}

如何编译:

g++ -I $JAVA_HOME/include -I $JAVA_HOME/include/linux -fPIC -shared -olibabort.so abort.cpp

如何运行:

java -agentpath:/path/to/libabort.so=java/lang/StackOverflowError ...

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