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\u0026#34;yuv420p\u0026#34;;    int tmp \u003D44;};\u003C/code\u003E\u003Cp\u003E调试时发现从第一个字符串往后，字段都没有正常初始化\u003C/p\u003E\u003Ccode\u003E(gdb) info lineLine 1021 of \u0026#34;/repos/dv_app_solution/pri**_all/pri**/include/pri**/pri**Json.hpp\u0026#34;   starts at address 0x7fffeb60f470 \u0026lt;pri**::json::fromJsonString\u0026lt;dv_common_config\u0026gt;(std::string const\u0026amp;\u0026amp;)+28\u0026gt;   and ends at 0x7fffeb60f478 \u0026lt;pri**::json::fromJsonString\u0026lt;dv_common_config\u0026gt;(std::string const\u0026amp;\u0026amp;)+36\u0026gt;.(gdb) list10161017template \u0026lt;class T\u0026gt;1018static inline std::unique_ptr\u0026lt;T\u0026gt; fromJsonString(const std::string\u0026amp;\u0026amp; str)1019{1020    std::unique_ptr\u0026lt;T\u0026gt; model \u003D std::make_unique\u0026lt;T\u0026gt;();1021    privates::jsonType\u0026lt;T\u0026gt;::type::from_jsonStr(std::move(*model), std::move(str), 0, static_cast\u0026lt;int\u0026gt;(str.length() - 1));10221023    return model;1024}1025template \u0026lt;class T\u0026gt;(gdb) print *model$9 \u003D {detect_delay_ms \u003D 0, reject_delay_ms \u003D 0, detect_count_oneshot \u003D 1, detect_count \u003D 0, detect_count_interval \u003D 100, ref_image_path \u003D \u0026#34;\u0026#34;, cam_x \u003D 0,   cam_y \u003D 0, rpicam_pixel_type \u003D \u0026lt;error reading variable: Cannot create a lazy string with address 0x0, and a non-zero length.\u0026gt;, tmp \u003D 796092265}(gdb) \u003C/code\u003E\u003Cp\u003E程序会在后面的逻辑中，崩溃在使用 rpicam_pixel_type 这个字段的时候,用 asan 看了是由于这个错误的字符串被认为超过 10 个 T 导致崩溃随便把它赋值给其他变量就会崩溃\u003C/p\u003E\u003Cp\u003E没有思路，有什么方式进一进定位吗\u003C/p\u003E',ipRegion:'',updatedByUid:0,createdAt:'2025-04-10 12:06:23',updatedAt:'2025-04-14 15:33:28',mentionNum:0,mentionedBy:[],mentionUsers:[],likeUsers:[],},{id:104248,num:1,uid:7121,content:'DV_COMMON_EXPORT 是什么？',ipRegion:'',updatedByUid:0,createdAt:'2025-04-10 12:49:07',updatedAt:'2025-04-14 15:33:28',mentionNum:0,mentionedBy:[],mentionUsers:[],likeUsers:[],},{id:104249,num:2,uid:12427,content:'DV_COMMON_EXPORT 估计是到处宏；\u003Cbr\u003E如果导出的模块，结构的所有 std::string  全部要改成 char*，不然以后跨模块，有得你受咯',ipRegion:'',updatedByUid:0,createdAt:'2025-04-10 12:53:25',updatedAt:'2025-04-14 15:33:28',mentionNum:0,mentionedBy:[],mentionUsers:[],likeUsers:[],},{id:104250,num:3,uid:17725,content:'用 gbd watch 看变量在哪里被修改了。',ipRegion:'',updatedByUid:0,createdAt:'2025-04-10 12:59:29',updatedAt:'2025-04-14 15:33:28',mentionNum:0,mentionedBy:[],mentionUsers:[],likeUsers:[],},{id:104251,num:4,uid:17725,content:'edit：gdb watch',ipRegion:'',updatedByUid:0,createdAt:'2025-04-10 12:59:49',updatedAt:'2025-04-14 15:33:28',mentionNum:0,mentionedBy:[],mentionUsers:[],likeUsers:[],},{id:104252,num:5,uid:3690,content:'丢给 gpt 阔以直接问出来啊。fromJsonString 这玩意是直接内存拷贝啊。。string 是类啊。。关键其实不在于你上面的定义。。 而是感觉你 guide 看漏了。。',ipRegion:'',updatedByUid:0,createdAt:'2025-04-10 13:19:33',updatedAt:'2025-04-14 15:33:28',mentionNum:0,mentionedBy:[],mentionUsers:[],likeUsers:[],},{id:104253,num:6,uid:45,content:'from_jsonStr 的代码呢？',ipRegion:'',updatedByUid:0,createdAt:'2025-04-10 13:32:54',updatedAt:'2025-04-14 15:33:28',mentionNum:0,mentionedBy:[23,],mentionUsers:[],likeUsers:[],},{id:104254,num:7,uid:1242,content:'有点看不懂，现在的 c++ 已经可以在定义结构体的时候赋值了吗？建议贴代码出来',ipRegion:'',updatedByUid:0,createdAt:'2025-04-10 13:50:08',updatedAt:'2025-04-14 15:33:28',mentionNum:0,mentionedBy:[],mentionUsers:[],likeUsers:[],},{id:104255,num:8,uid:6542,content:'2 楼说的对，如果是 export 的，不要使用 c++类，只使用基本数据类型，你无法知道调用者用的是哪种 stl 的实现和内存分配，不一致就会出现莫名其妙的错误。',ipRegion:'',updatedByUid:0,createdAt:'2025-04-10 13:58:09',updatedAt:'2025-04-14 15:33:28',mentionNum:0,mentionedBy:[],mentionUsers:[],likeUsers:[],},{id:104256,num:9,uid:16969,content:'是不是因为你给了短字符串，编译器错误优化到了栈上？',ipRegion:'',updatedByUid:0,createdAt:'2025-04-10 14:18:34',updatedAt:'2025-04-14 15:33:28',mentionNum:0,mentionedBy:[],mentionUsers:[],likeUsers:[],},{id:104257,num:10,uid:140,content:'C++11 起就可以这样初始化赋值了\u003Cbr\u003Ehttps://en.cppreference.com/w/cpp/language/data_members#Member_initialization',ipRegion:'',updatedByUid:0,createdAt:'2025-04-10 14:22:44',updatedAt:'2025-04-14 15:33:28',mentionNum:0,mentionedBy:[],mentionUsers:[],likeUsers:[],},{id:104258,num:11,uid:6964,content:'```cpp\u003Cbr\u003Estd::unique_ptr\u0026lt;T\u0026gt; model \u003D std::make_unique\u0026lt;T\u0026gt;();\u003Cbr\u003Efunc(std::move(*model));\u003Cbr\u003Ereturn model;\u003Cbr\u003E``` \u003Cbr\u003E\u003Cbr\u003E这 model 不是被 move 了吗？这是在干嘛',ipRegion:'',updatedByUid:0,createdAt:'2025-04-10 14:24:04',updatedAt:'2025-04-14 15:33:28',mentionNum:0,mentionedBy:[],mentionUsers:[],likeUsers:[],},{id:104259,num:12,uid:11232,content:'导出动态库、std::string 、内存分配问题\u003Cbr\u003E这 3 个结合大概率是 c++ abi 混用引起的吧',ipRegion:'',updatedByUid:0,createdAt:'2025-04-10 14:35:16',updatedAt:'2025-04-14 15:33:28',mentionNum:0,mentionedBy:[],mentionUsers:[],likeUsers:[],},{id:104260,num:13,uid:17726,content:'说的对，model 里面的 std::string 已经 move 了。去掉 std::move()试试。',ipRegion:'',updatedByUid:0,createdAt:'2025-04-10 14:38:36',updatedAt:'2025-04-14 15:33:28',mentionNum:0,mentionedBy:[],mentionUsers:[],likeUsers:[],},{id:104261,num:14,uid:6185,content:'fromJsonString 的入参是右值引用，会调用对象的移动构造\u003Cbr\u003E你的 product_config 没有 explict 的移动构造，那么会根据内部成员的移动构造生成隐式移动构造\u003Cbr\u003E调用完移动构造后 std::string 会变为无效状态\u003Cbr\u003E\u003Cbr\u003E\u003Cbr\u003E在你这个地方报错显示 std::string 成员的指针已经变成了 null ，说明之前被移动过了，合理推测是你使用了类似\u003Cbr\u003Eproduct_config c;\u003Cbr\u003Ea \u003D fromJsonString(c);\u003Cbr\u003Eb \u003D fromJsonString(c);\u003Cbr\u003E的代码',ipRegion:'',updatedByUid:0,createdAt:'2025-04-10 14:43:23',updatedAt:'2025-04-14 15:33:28',mentionNum:0,mentionedBy:[],mentionUsers:[],likeUsers:[],},{id:104262,num:15,uid:869,content:'\u003Cbr\u003E\u003Cbr\u003E我断点在 make_unique 的那一行，hit 后 next 执行一步，那时在 gdb 里 print *model ，就已经是这样了，应该不是移动构造导致的，因为单元测试过嵌套类\u003Cbr\u003E再者，是第一个字符串后面的 int 也有问题了，  前面的 Int 没有问题\u003Cbr\u003E\u003Cbr\u003E\u003Cbr\u003E 桌面软件的动态库，一起编译的，只在桌面 app 上用，所以应该不是 abi 问题，像是内存问题',ipRegion:'',updatedByUid:0,createdAt:'2025-04-10 15:20:02',updatedAt:'2025-04-14 15:33:28',mentionNum:0,mentionedBy:[],mentionUsers:[],likeUsers:[],},{id:104263,num:16,uid:17727,content:'asan 扫过了 \u003Cbr\u003E那 ubsan 扫过了么\u003Cbr\u003E如果调用方有多线程 tsan 扫过了么',ipRegion:'',updatedByUid:0,createdAt:'2025-04-10 15:44:48',updatedAt:'2025-04-14 15:33:28',mentionNum:0,mentionedBy:[],mentionUsers:[],likeUsers:[],},{id:104264,num:17,uid:869,content:'model 没有实现移动构造，这里会退化为引用，不是这的问题， 断点才走到这行，还没 step 到 move 里',ipRegion:'',updatedByUid:0,createdAt:'2025-04-10 15:47:34',updatedAt:'2025-04-14 15:33:28',mentionNum:0,mentionedBy:[],mentionUsers:[],likeUsers:[],},{id:104265,num:18,uid:869,content:'嗯，调了一下没什么头绪， 试试后面这两个，  这下倒是把交叉编译的调试摸索门清了，谢谢佬',ipRegion:'',updatedByUid:0,createdAt:'2025-04-10 15:54:22',updatedAt:'2025-04-14 15:33:28',mentionNum:0,mentionedBy:[],mentionUsers:[],likeUsers:[],},{id:104266,num:19,uid:17725,content:'https://godbolt.org/z/WeqKM6qr3\u003Cbr\u003E做了个最小例子，看起来各家编译器编译结果都没啥问题。还是 DV_COMMON_EXPORT 和 from_jsonStr 嫌疑比较大。\u003Cbr\u003E另外你的 gdb 里面 ref_image_path 看起来也不对劲。',ipRegion:'',updatedByUid:0,createdAt:'2025-04-10 16:55:01',updatedAt:'2025-04-14 15:33:28',mentionNum:0,mentionedBy:[],mentionUsers:[],likeUsers:[],},],usersMap:new 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const username=this.usersMap.get(uid).username
if(!username){return "#"+this.getPostNumByPostId(id)}
return username},getPostNumByPostId(id){const post=this.posts.find(post=>post.id===id)
return post.num},getPostById(id){const post=this.posts.find(post=>post.id===id)
return post},getPostByNum(num){const post=this.posts.find(post=>post.num===num)
return post},getAvatarByUid(uid){const avatar=this.usersMap.get(uid)?.avatar
if(!avatar){return this.getRandomAvatar()}
return avatar},getAvatarByPostNum(num){const post=this.posts.find(post=>post.num===num)
if(!post){return this.getRandomAvatar()}
const uid=post.uid
return this.getAvatarByUid(uid)},getRandomAvatar(){const num=Math.floor(Math.random()*100)
return "https://randomuser.me/api/portraits/men/"+num+".jpg"},getUrlByUid(uid){const url=this.usersMap.get(uid)?.url
if(!url){return ""}
return url},getTextByPostNum(num){const post=this.posts.find(post=>post.num===num)
if(!post||!post.content){return '点击跳转到#'+num+'查看'}
const parser=new DOMParser()
const doc=parser.parseFromString(post.content,'text/html')
const text=doc.body.textContent||''
return text.slice(0,100)},addHeadingIds(){const content=document.getElementById('post-content-0')
if(!content){this.nav.showTOC=false
return}
const headings=content.querySelectorAll('h2, h3, h4')
headings.forEach((heading,index)=>{if(!heading.id){heading.id=`toc-nav-${index}`}})
if(headings.length==0){this.nav.showTOC=false}},async doSearch(keywords){this.search.loading=true
try{const response=await axios.post('/fapi/v1/search',{keywords:keywords,})
if(response.data.code===0){if(response.data.data.hash&&response.data.data.hash.length===32){window.location.href="/s/"+response.data.data.hash}else{this.failureAlert('搜索失败: 搜索服务异常')}}else{this.failureAlert('搜索失败: '+response.data.msg)}}catch(error){this.failureAlert('搜索失败: '+error)}
this.search.loading=false},debounce(fn,delay){let timer=null
return function(...args){if(timer)clearTimeout(timer)
timer=setTimeout(()=>{fn.apply(this,args)},delay);};},},watch:{'nav.post.targetPage':{handler:async function(newV,oldV){this.toPage()},immediate:false},},}
const vuetify=createVuetify({defaults:{global:{ripple:true,},},})
const app=createApp(App)
app.use(vuetify).mount("#app")