{"id":14047,"date":"2024-07-26T14:49:55","date_gmt":"2024-07-26T06:49:55","guid":{"rendered":"http:\/\/xinyiworld.top\/wordpress_it\/?p=14047"},"modified":"2024-08-22T15:52:05","modified_gmt":"2024-08-22T07:52:05","slug":"servicemanager%e6%9c%8d%e5%8a%a1","status":"publish","type":"post","link":"http:\/\/xinyiworld.top\/wordpress_it\/?p=14047","title":{"rendered":"servicemanager\u670d\u52a1"},"content":{"rendered":"<p><a href=\"https:\/\/blog.csdn.net\/tkwxty\/article\/details\/102904305\">https:\/\/blog.csdn.net\/tkwxty\/article\/details\/102904305<\/a> (\u975e\u5e38\u8be6\u7ec6\uff01)<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_16 counter-hierarchy counter-decimal ez-toc-grey\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\">\u76ee\u5f55<\/p>\n<span class=\"ez-toc-title-toggle\"><a class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" style=\"display: none;\"><i class=\"ez-toc-glyphicon ez-toc-icon-toggle\"><\/i><\/a><\/span><\/div>\n<nav><ul class=\"ez-toc-list ez-toc-list-level-1\"><li class=\"ez-toc-page-1 ez-toc-heading-level-1\"><a class=\"ez-toc-link ez-toc-heading-1\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=14047\/#%E4%B8%80%E3%80%81%E6%9E%B6%E6%9E%84\" title=\"\u4e00\u3001\u67b6\u6784\">\u4e00\u3001\u67b6\u6784<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-1\"><a class=\"ez-toc-link ez-toc-heading-2\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=14047\/#%E4%BA%8C%E3%80%81%E6%BA%90%E7%A0%81%E5%88%86%E6%9E%90\" title=\"\u4e8c\u3001\u6e90\u7801\u5206\u6790\">\u4e8c\u3001\u6e90\u7801\u5206\u6790<\/a><ul class=\"ez-toc-list-level-2\"><li class=\"ez-toc-heading-level-2\"><a class=\"ez-toc-link ez-toc-heading-3\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=14047\/#main%E5%87%BD%E6%95%B0\" title=\"main\u51fd\u6570\">main\u51fd\u6570<\/a><ul class=\"ez-toc-list-level-3\"><li class=\"ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-4\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=14047\/#1binder_open%E5%87%BD%E6%95%B0\" title=\"1.binder_open\u51fd\u6570\">1.binder_open\u51fd\u6570<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-5\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=14047\/#2binder_become_context_manager%E5%87%BD%E6%95%B0\" title=\"2.binder_become_context_manager\u51fd\u6570\">2.binder_become_context_manager\u51fd\u6570<\/a><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-3\"><a class=\"ez-toc-link ez-toc-heading-6\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=14047\/#3binder_loop%E5%87%BD%E6%95%B0\" title=\"3.binder_loop\u51fd\u6570\">3.binder_loop\u51fd\u6570<\/a><\/li><\/ul><\/li><\/ul><\/li><li class=\"ez-toc-page-1 ez-toc-heading-level-1\"><a class=\"ez-toc-link ez-toc-heading-7\" href=\"http:\/\/xinyiworld.top\/wordpress_it\/?p=14047\/#%E4%B8%89%E3%80%81defaultServiceManager\" title=\"\u4e09\u3001defaultServiceManager()\">\u4e09\u3001defaultServiceManager()<\/a><\/li><\/ul><\/nav><\/div>\n<h1><span class=\"ez-toc-section\" id=\"%E4%B8%80%E3%80%81%E6%9E%B6%E6%9E%84\"><\/span>\u4e00\u3001\u67b6\u6784<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p>\u6e90\u7801\u4f4d\u7f6e\uff1a<code>frameworks\/native\/cmds\/servicemanager\/service_manager.c<\/code><\/p>\n<ul>\n<li>\u4e0ezygote\u5173\u7cfb\uff1a\u4e0ezygote\u901a\u8baf\uff0cservicemanager\u91cd\u542f\u4f1a\u5bfc\u81f4zygote\u4e5f\u91cd\u542f\uff0c\u89c1\u5176rc\u6587\u4ef6\u3002<\/li>\n<li>\u4e0esystem_server\u5173\u7cfb\uff1a<br \/>\nServiceManager \u7528\u6765\u7ba1\u7406\u5404\u79cd Service\uff0c\u4f7f\u7528 C\/S \u67b6\u6784\uff0cBinder \u901a\u4fe1\u673a\u5236\u3002Client \u7aef\u8981\u4f7f\u7528\u67d0\u4e2a Service\uff0c\u5148\u8981\u5230 ServiceManager \u67e5\u8be2 Service \u7684\u76f8\u5173\u4fe1\u606f\uff0c\u7136\u540e\u6839\u636e Service \u7684\u76f8\u5173\u4fe1\u606f\u4e0e Server \u7aef\u5efa\u7acb\u901a\u4fe1\u901a\u8def\u3002<\/li>\n<\/ul>\n<p><img src=\"http:\/\/xinyiworld.top\/wordpress_it\/wp-content\/uploads\/2024\/07\/binder.png\" alt=\"\" \/><\/p>\n<h1><span class=\"ez-toc-section\" id=\"%E4%BA%8C%E3%80%81%E6%BA%90%E7%A0%81%E5%88%86%E6%9E%90\"><\/span>\u4e8c\u3001\u6e90\u7801\u5206\u6790<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<h2><span class=\"ez-toc-section\" id=\"main%E5%87%BD%E6%95%B0\"><\/span>main\u51fd\u6570<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"1binder_open%E5%87%BD%E6%95%B0\"><\/span>1.binder_open\u51fd\u6570<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u51fd\u6570\u5b9e\u73b0\u4e8e<code>frameworks\/native\/cmds\/servicemanager\/binder.c<\/code><\/p>\n<pre><code class=\"language-cpp\"> 97 struct binder_state *binder_open(const char* driver, size_t mapsize)\n 98 {\n...\n108     bs-&gt;fd = open(driver, O_RDWR | O_CLOEXEC);\n...\n124     bs-&gt;mapped = mmap(NULL, mapsize, PROT_READ, MAP_PRIVATE, bs-&gt;fd, 0);\n138 }<\/code><\/pre>\n<p>open\u4e0emmap\u65b9\u6cd5\u6700\u7ec8\u4f1a\u8c03\u7528\u5230binder\u9a71\u52a8<code>kernel\/msm-4.19\/drivers\/android\/binder.c<\/code><br \/>\n\u4e3b\u8981\u6709\u4e24\u4e2a\u64cd\u4f5c\uff1a<br \/>\n1\uff09ServiceManager\u8fdb\u7a0b\uff1a\u5c31\u662f\u6253\u5f00\/dev\/binder\uff0c\u540c\u65f6\u6620\u5c04\u7269\u7406\u5185\u5b58\u5230\u8fdb\u7a0b\u7a7a\u95f4\u3002<br \/>\n2\uff09Binder\u9a71\u52a8\uff1a\u65b0\u5efa\u5e76\u521d\u59cb\u5316\u8be5\u8fdb\u7a0b\u5bf9\u5e94\u7684binder_proc\u7ed3\u6784\u4f53\uff0c\u540c\u65f6\u5c06\u5185\u6838\u865a\u62df\u5730\u5740\u548c\u8be5\u8fdb\u7a0b\u7684\u865a\u62df\u5730\u5740\u6620\u5c04\u5230\u540c\u4e00\u7269\u7406\u5185\u5b58\u4e2d\u3002\uff08Binder\u8fdb\u7a0b\u95f4\u901a\u4fe1\u673a\u5236\u7684\u7cbe\u9ad3\u6240\u5728\uff01\uff01\uff09<\/p>\n<blockquote>\n<p>\u5728Binder\u901a\u4fe1\u673a\u5236\u4e2d\uff0cmmap()\u4f1a\u5c06Server\u8fdb\u7a0b\u7684\u865a\u62df\u5730\u5740\u548c\u5185\u6838\u865a\u62df\u5730\u5740\u6620\u5c04\u5230\u540c\u4e00\u4e2a\u7269\u7406\u9875\u9762\u3002\u90a3\u4e48\u5f53Client\u8fdb\u7a0b\u5411Server\u8fdb\u7a0b\u53d1\u9001\u8bf7\u6c42\u65f6\uff0c\u53ea\u9700\u8981\u5c06Client\u7684\u6570\u636e\u62f7\u8d1d\u5230\u5185\u6838\u7a7a\u95f4\u5373\u53ef\uff01\u7531\u4e8eServer\u8fdb\u7a0b\u7684\u5730\u5740\u548c\u5185\u6838\u7a7a\u95f4\u6620\u5c04\u5230\u540c\u4e00\u4e2a\u7269\u7406\u9875\u9762\uff0c\u56e0\u6b64\uff0cClient\u4e2d\u7684\u6570\u636e\u62f7\u8d1d\u5230\u5185\u6838\u7a7a\u95f4\u65f6\uff0c\u4e5f\u5c31\u76f8\u5f53\u4e8e\u62f7\u8d1d\u5230\u4e86Server\u8fdb\u7a0b\u4e2d\u3002\u56e0\u6b64\uff0cBinder\u901a\u4fe1\u673a\u5236\u4e2d\uff0c\u6570\u636e\u4f20\u8f93\u65f6\uff0c\u53ea\u9700\u89811\u6b21\u5185\u5b58\u62f7\u8d1d\uff01<\/p>\n<\/blockquote>\n<h3><span class=\"ez-toc-section\" id=\"2binder_become_context_manager%E5%87%BD%E6%95%B0\"><\/span>2.binder_become_context_manager\u51fd\u6570<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>1\uff09\u5728\u7528\u6237\u5c42\u901a\u77e5Kernel Binder\u9a71\u52a8\uff0c\u5f53\u524d\u8fdb\u7a0b(\u5373ServiceManager\u8fdb\u7a0b)\u662fBinder\u4e0a\u4e0b\u6587\u7ba1\u7406\u8005\uff0c\u5f53\u7136Binder\u9a71\u52a8\u4e5f\u4e0d\u662f\u90a3\u4e48\u597d\u7cca\u5f04\u7684\u4f1a\u7ecf\u8fc7\u4e00\u4e9b\u7cfb\u5217\u7684\u5b89\u5168\u68c0\u9a8c\uff0c\u5fc5\u987b\u5148\u9a8c\u8bc1\u8eab\u4efd\u3002\u8fd9\u6837ServiceManager\u5c31\u6210\u4e3a\u4e86\u7ecf\u5e38\u88ab\u5404\u4e2abinder\u535a\u5ba2\u4e2d\u63d0\u5230\u7684\u670d\u52a1\u5927\u7ba1\u5bb6\u3002<br \/>\n2\uff09\u5728\u5185\u6838Binder\u9a71\u52a8\u5c42\uff0c\u65b0\u5efa\u5f53\u524d\u7ebf\u7a0b\u5bf9\u5e94\u7684binder_thread\u5bf9\u8c61\uff0c\u5e76\u5c06\u5176\u6dfb\u52a0\u5230\u8fdb\u7a0b\u4e0a\u4e0b\u6587\u4fe1\u606fbinder_proc\u7684threads\u7ea2\u9ed1\u6811\u4e2d\uff1b\u65b0\u5efaServiceManager\u5bf9\u5e94\u7684binder\u5b9e\u4f53\uff0c\u5e76\u5c06\u8be5binder\u5b9e\u4f53\u4fdd\u5b58\u5230\u5168\u5c40\u53d8\u91cfbinder_context_mgr_node\u4e2d\u3002<\/p>\n<blockquote>\n<p>\u5bf9\u4e8e\u6bcf\u4e00\u4e2aBinder service\uff0cBinder\u9a71\u52a8\u90fd\u4f1a\u4e3a\u5176\u5206\u914d\u4e00\u4e2abinder_node\u5bf9\u8c61\u3002\u5bf9\u4e8eServiceManager\u8fd9\u4e2aBinder\u4e0a\u4e0b\u6587\u7ba1\u7406\u8005\u800c\u8a00\uff0cBinder\u9a71\u52a8\u66f4\u662f\u4f1a\u5c06\u5b83\u7684Binder\u5b9e\u4f53\u4fdd\u5b58\u5230\u5168\u5c40\u53d8\u91cfbinder_context_mgr_node \u4e2d\u3002<\/p>\n<\/blockquote>\n<h3><span class=\"ez-toc-section\" id=\"3binder_loop%E5%87%BD%E6%95%B0\"><\/span>3.binder_loop\u51fd\u6570<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>\u9996\u5148\u8c03\u7528binder_write(,BC_ENTER_LOOPER,)\u544a\u8bc9Kernel Binder\u9a71\u52a8\uff0c\u6211(ServiceManager\u8fdb\u7a0b)\u51c6\u5907\u8981\u8fdb\u5165\u6d88\u606f\u5faa\u73af\u72b6\u6001\u4e86\uff0c\u8bf7\u505a\u597d\u76f8\u5173\u7684\u51c6\u5907\u3002\u7d27\u63a5\u7740\uff0c\u5c31\u901a\u8fc7ioctl(,BINDER_WRITE_READ,)\u8fdb\u5165\u6d88\u606f\u5faa\u73af\uff0c\u7b49\u5f85Client\u53d1\u9001\u8bf7\u6c42(\u4f8b\u5982\uff0cMediaPlayer\u8fdb\u7a0b\u8c03\u7528addService\u5c06MediaPlayer\u6ce8\u518c\u5230ServiceManager\u4e2d\u8fdb\u884c\u7ba1\u7406)\u3002\u5982\u679c\u6ca1\u6709\u6d88\u606f\uff0c\u5219\u8fdb\u5165\u4e2d\u65ad\u7b49\u5f85\u72b6\u6001\uff1b\u5982\u679c\u6709\u6d88\u606f\uff0c\u5219\u8fdb\u884c\u6d88\u606f\u5904\u7406\uff01<\/p>\n<h1><span class=\"ez-toc-section\" id=\"%E4%B8%89%E3%80%81defaultServiceManager\"><\/span>\u4e09\u3001defaultServiceManager()<span class=\"ez-toc-section-end\"><\/span><\/h1>\n<p>\u5176\u5b83\u8fdb\u7a0b\u53ef\u4ee5\u901a\u8fc7\u6b64\u65b9\u6cd5\u83b7\u53d6\u5230ServiceManager\u670d\u52a1\u7684\u4ee3\u7406\u5bf9\u8c61\uff0c\u5177\u4f53\u5206\u6790\u89c1\uff1a<a href=\"https:\/\/blog.csdn.net\/tkwxty\/article\/details\/103034523\">https:\/\/blog.csdn.net\/tkwxty\/article\/details\/103034523<\/a><br \/>\n\u6700\u7ec8\u8fd4\u56de\u7684\u662fBpServiceManager\u5bf9\u8c61<br \/>\n<code>gDefaultServiceManager = new BpServiceManager(new BpBinder(0)); <\/code><\/p>\n<button class=\"simplefavorite-button\" data-postid=\"14047\" 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>https:\/\/blog.csdn.net\/tkwxty\/article\/details\/10290 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