{"id":14481,"date":"2024-08-26T16:33:25","date_gmt":"2024-08-26T08:33:25","guid":{"rendered":"http:\/\/xinyiworld.top\/wordpress_it\/?p=14481"},"modified":"2024-08-30T10:20:47","modified_gmt":"2024-08-30T02:20:47","slug":"bpbinder-cpp","status":"publish","type":"post","link":"http:\/\/xinyiworld.top\/wordpress_it\/?p=14481","title":{"rendered":"BpBinder.cpp"},"content":{"rendered":"<p>\u6e90\u7801\u4f4d\u7f6e\uff1a<code> frameworks\/native\/libs\/binder\/BpBinder.cpp<\/code><br \/>\n<code>frameworks\/native\/include\/binder\/BpBinder.h<\/code><\/p>\n<h2>\u65b9\u6cd5<\/h2>\n<ul>\n<li>\n<p>\u6784\u9020\u51fd\u6570<\/p>\n<pre><code class=\"language-cpp\">138 BpBinder::BpBinder(int32_t handle, int32_t trackedUid)\n139     : mHandle(handle)\n140     , mAlive(1)\n141     , mObitsSent(0)\n142     , mObituaries(nullptr)\n143     , mTrackedUid(trackedUid)\n144 {\n145     ALOGV(&quot;Creating BpBinder %p handle %d\\n&quot;, this, mHandle);\n146 \n147     extendObjectLifetime(OBJECT_LIFETIME_WEAK);\n148     IPCThreadState::self()-&gt;incWeakHandle(handle, this);\n149 }<\/code><\/pre>\n<\/li>\n<li>\n<p>create<\/p>\n<pre><code class=\"language-cpp\">109 BpBinder* BpBinder::create(int32_t handle) {\n110     int32_t trackedUid = -1;\n111     if (sCountByUidEnabled) {\n112         trackedUid = IPCThreadState::self()-&gt;getCallingUid();\n113         AutoMutex _l(sTrackingLock);\n114         uint32_t trackedValue = sTrackingMap[trackedUid];\n115         if (CC_UNLIKELY(trackedValue &amp; LIMIT_REACHED_MASK)) {\n116             if (sBinderProxyThrottleCreate) {\n117                 return nullptr;\n118             }\n119         } else {\n120             if ((trackedValue &amp; COUNTING_VALUE_MASK) &gt;= sBinderProxyCountHighWatermark) {\n121                 ALOGE(&quot;Too many binder proxy objects sent to uid %d from uid %d (%d proxies held)&quot;,\n122                       getuid(), trackedUid, trackedValue);\n123                 sTrackingMap[trackedUid] |= LIMIT_REACHED_MASK;\n124                 if (sLimitCallback) sLimitCallback(trackedUid);\n125                 if (sBinderProxyThrottleCreate) {\n126                     ALOGI(&quot;Throttling binder proxy creates from uid %d in uid %d until binder proxy&quot;\n127                           &quot; count drops below %d&quot;,\n128                           trackedUid, getuid(), sBinderProxyCountLowWatermark);\n129                     return nullptr;\n130                 }\n131             }\n132         }\n133         sTrackingMap[trackedUid]++;\n134     }\n135     return new BpBinder(handle, trackedUid);\n136 }<\/code><\/pre>\n<p>IPCThreadState\u7c7b\u89c1<a href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=14487\">http:\/\/xinyiworld.top\/wordpress_it\/?p=14487<\/a><\/p>\n<\/li>\n<\/ul>\n<button class=\"simplefavorite-button\" data-postid=\"14481\" data-siteid=\"1\" data-groupid=\"1\" data-favoritecount=\"0\" style=\"\">\u6536\u85cf <i class=\"sf-icon-star-empty\"><\/i><\/button>","protected":false},"excerpt":{"rendered":"<p>\u6e90\u7801\u4f4d\u7f6e\uff1a frameworks\/native\/libs\/binder\/BpBinder.cpp f [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[1103],"tags":[],"_links":{"self":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/14481"}],"collection":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=14481"}],"version-history":[{"count":5,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/14481\/revisions"}],"predecessor-version":[{"id":14529,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=\/wp\/v2\/posts\/14481\/revisions\/14529"}],"wp:attachment":[{"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=14481"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=14481"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/xinyiworld.top\/wordpress_it\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=14481"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}