Spidermonkey 1.8.5在调试模式下崩溃

spidermonkey 1.8.5 crashes in debug mode

本文关键字:模式 崩溃 调试 Spidermonkey      更新时间:2023-10-16

我在应用程序中使用Spidermonkey 1.8.5。当我使用调试JS库时,应用程序崩溃了。我正在用以下选项构建库:——启用调试——禁用优化——启用threadsafe

crash指向这里:断言失败:(cx)->thread->data。requestDepth | | (cx) ->线程= = (cx) ->运行> gcThread,在. ./. ./src/jsapi.cpp

下面是示例程序
/* Include the JSAPI header file to get access to SpiderMonkey. */
#include "jsapi.h"

/* The class of the global object. */
static JSClass global_class = {
    "global", JSCLASS_GLOBAL_FLAGS,
    JS_PropertyStub, JS_PropertyStub, JS_PropertyStub, JS_StrictPropertyStub,
    JS_EnumerateStub, JS_ResolveStub, JS_ConvertStub, JS_FinalizeStub,
    JSCLASS_NO_OPTIONAL_MEMBERS
};
/* The error reporter callback. */
void reportError(JSContext *cx, const char *message, JSErrorReport *report)
{
    fprintf(stderr, "%s:%u:%sn",
            report->filename ? report->filename : "<no filename="filename">",
            (unsigned int) report->lineno,
            message);
}
int main(int argc, const char *argv[])
{
    /* JSAPI variables. */
    JSRuntime *rt;
    JSContext *cx;
    JSObject  *global;
    printf("Startedn");
    /* Create a JS runtime. You always need at least one runtime per process. */
    rt = JS_NewRuntime(8 * 1024 * 1024);
    if (rt == NULL)
        return 1;
    /*
     * Create a context. You always need a context per thread.
     * Note that this program is not multi-threaded.
     */
    cx = JS_NewContext(rt, 8192);
    if (cx == NULL)
        return 1;
    JS_SetErrorReporter(cx, reportError);
    /*
     * Create the global object in a new compartment.
     * You always need a global object per context.
     */
    global = JS_NewCompartmentAndGlobalObject(cx, &global_class, NULL);
    if (global == NULL)
        return 1;
    /*
     * Populate the global object with the standard JavaScript
     * function and object classes, such as Object, Array, Date.
     */
    if (!JS_InitStandardClasses(cx, global))
        return 1;
    /* Your application code here. This may include JSAPI calls
     * to create your own custom JavaScript objects and to run scripts.
     *
     * The following example code creates a literal JavaScript script,
     * evaluates it, and prints the result to stdout.
     *
     * Errors are conventionally saved in a JSBool variable named ok.
     */
    char *script = "'Hello ' + 'World!'";
    jsval rval;
    JSString *str;
    JSBool ok;
    const char *filename = "noname";
    uintN lineno = 0;
    ok = JS_EvaluateScript(cx, global, script, strlen(script),
                           filename, lineno, &rval);
    if (rval == NULL | rval == JS_FALSE)
        return 1;
    str = JS_ValueToString(cx, rval);
    printf("%sn", JS_EncodeString(cx, str));
    /* End of your application code */
    /* Clean things up and shut down SpiderMonkey. */
    JS_DestroyContext(cx);
    JS_DestroyRuntime(rt);
    JS_ShutDown();
    return 0;
}

如果我在发布模式下构建,程序工作正常。这个问题只在调试模式下出现。我遗漏了什么?

JS_NewCompartmentAndGlobalObject调用之前插入JS_BeginRequest(cx);

在调用JS_DestroyContext之前插入JS_EndRequest(cx);

大多数JSAPI函数都需要请求。(我不知道为什么。使用线程的最初原因与多线程有关,但现在每个JSRuntime都是单线程的。

SpiderMonkey的调试版本包含了一些断言,这些断言可以以发布模式不能的方式检查API的使用情况。因此,您可能会再次看到只调试的断言。我强烈建议根据调试构建进行开发,因为这些断言几乎总是指出真正的问题。

下一个SpiderMonkey版本即将发布:https://bugzilla.mozilla.org/show_bug.cgi?id=735599#c54