{"id":1363,"date":"2022-03-10T01:37:01","date_gmt":"2022-03-09T17:37:01","guid":{"rendered":"https:\/\/www.xianwaizhiyin.net\/?p=1363"},"modified":"2022-06-11T02:22:52","modified_gmt":"2022-06-10T18:22:52","slug":"st%e6%ba%90%e7%a0%81%e5%88%86%e6%9e%90-%e5%8d%8f%e7%a8%8b%e5%b1%80%e9%83%a8%e5%8f%98%e9%87%8f","status":"publish","type":"post","link":"https:\/\/www.xianwaizhiyin.net\/?p=1363","title":{"rendered":"ST\u6e90\u7801\u5206\u6790-\u534f\u7a0b\u5c40\u90e8\u53d8\u91cf"},"content":{"rendered":"\n<p>\u300a<a href=\"https:\/\/www.xianwaizhiyin.net\/?p=1193\">ST\u6e90\u7801\u5206\u6790-st_thread_create<\/a>\u300b\u8ddf \u300a<a href=\"https:\/\/www.xianwaizhiyin.net\/?p=1356\">ST\u6e90\u7801\u5206\u6790-\u5185\u5b58\u4fdd\u62a4<\/a>\u300b\u4e24\u7bc7\u6587\u7ae0\uff0c\u8bb2\u89e3\u4e86\uff0c\u534f\u7a0b\u51fd\u6570\u7684\u6808\u5185\u5b58\u5c31\u662f\u4e0b\u56fe\u7684\u533a\u57df\uff0c\u5982\u4e0b\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"538\" height=\"440\" src=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/st-19-1.png\" alt=\"\" class=\"wp-image-1371\" srcset=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/st-19-1.png 538w, https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/st-19-1-300x245.png 300w\" sizes=\"auto, (max-width: 538px) 100vw, 538px\" \/><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>google_ads_content<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u4e0b\u9762\u5c31\u6765\u9a8c\u8bc1\u4e00\u4e0b\u534f\u7a0b\u51fd\u6570\u7684\u5c40\u90e8\u53d8\u91cf\u662f\u4e0d\u662f\u771f\u7684\u5b58\u50a8\u5230\u8fd9\u5757\u5185\u5b58\u533a\u57df\u3002\u8fd8\u662f\u7528 <code class=\"prettyprint\" >lookupdns<\/code> \u505a\u6f14\u793a\u3002<\/p>\n\n\n\n<p>\u9996\u5148\uff0c\u5728<code class=\"prettyprint\" >st_thread_create()<\/code> \u51fd\u6570\u52a0\u4e0a\u4ee5\u4e0a\u4ee3\u7801\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >stack-&gt;sp = sp - _ST_STACK_PAD_SIZE;\n\/\/\u4e0b\u9762\u662f\u8c03\u8bd5\u4ee3\u7801\u3002\nprintf(&quot;stack-&gt;stk_bottom is %p \\r\\n&quot;,stack-&gt;stk_bottom);\nprintf(&quot;stack-&gt;sp is %p \\r\\n&quot;,stack-&gt;sp);<\/code><\/pre>\n\n\n\n<p>\u7136\u540e \u4fee\u6539 <code class=\"prettyprint\" >lookupdns.c<\/code> \u7684\u4ee3\u7801\uff0c\u5982\u4e0b\uff0c\u6253\u5370\u5c40\u90e8\u53d8\u91cf <code>addr<\/code> \u7684\u5730\u5740\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >void *do_resolve(void *host)\n{\n    struct in_addr addr;\n    printf(&quot;addr is %p \\r\\n&quot;,&amp;addr);\n    ....\n    return NULL;\n}\n\u200b<\/code><\/pre>\n\n\n\n<p>\u8fd0\u884c\u7ed3\u679c\u5982\u4e0b\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"835\" height=\"335\" src=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/st-19-2.png\" alt=\"\" class=\"wp-image-1367\" srcset=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/st-19-2.png 835w, https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/st-19-2-300x120.png 300w, https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/st-19-2-768x308.png 768w\" sizes=\"auto, (max-width: 835px) 100vw, 835px\" \/><\/figure>\n\n\n\n<p>\u4e0a\u56fe\u7684\u7b2c\u4e00\u6b21\u6253\u5370\u662f <code class=\"prettyprint\" >idle<\/code> \u534f\u7a0b\u7684\uff0c\u4e0d\u7528\u7ba1\u4ed6\u3002<\/p>\n\n\n\n<p>\u4ece\u4e0a\u56fe\u53ef\u4ee5\u770b\u5230\uff0c<code class=\"prettyprint\" >addr<\/code> \u7684\u5730\u5740\uff0c\u786e\u5b9e\u5728 <code>stack-&gt;stk_bottom<\/code> ~ <code>stack-&gt;sp<\/code> \u4e4b\u95f4\uff0c\u6240\u4ee5 <code>stack-&gt;stk_bottom<\/code> ~ <code>stack-&gt;sp<\/code> \u4e4b\u95f4\u7684\u5185\u5b58\uff0c\u5c31\u662f\u534f\u7a0b\u51fd\u6570\u7684\u6808\u5185\u5b58\u3002<\/p>\n\n\n\n<p>\u5728 <code class=\"prettyprint\" >do_resolve()<\/code> \u51fd\u6570\u91cc\u9762\uff0c\u5b9a\u4e49\u5b8c <code>addr<\/code> \u4e4b\u540e\uff0c\u6808\u9876\u662f 0x7f0114200d44\u3002\u8fd8\u5269 0x7f0114200d44 - 0x7f01141f1000 \u7b49\u4e8e 0xFD44 \u5b57\u8282\u3002\u5982\u679c\u6211\u518d\u5b9a\u4e49\u4e00\u4e2a\u53d8\u91cf\uff0c\u8d85\u8fc7\u8fd9\u4e2a\u6570\u91cf\u7684\u5b57\u8282\uff0c\u5c31\u4f1a\u89e6\u53d1\u8bbf\u95ee\u4fdd\u62a4\u5185\u5b58\u3002\u6f14\u793a\u4e00\u4e0b\uff1a<\/p>\n\n\n\n<p>\u6211\u5bf9\u6574\u4e2a <code class=\"prettyprint\" >do_resolve()<\/code> \u90fd\u505a\u4e86\u4fee\u6539\uff0c\u56e0\u4e3a <code>printf()<\/code> \u7684\u8c03\u7528\u4e5f\u4f1a\u5360\u7528\u6808\u5185\u5b58\u3002\u4ee3\u7801\u5982\u4e0b\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code class=\"prettyprint\" >void *do_resolve(void *host)\n{\n   struct in_addr addr;\n    char str&#091;64600] = {0};\n    printf(&quot;1\\r\\n&quot;);\n    return NULL;\n}<\/code><\/pre>\n\n\n\n<p>\u4e0a\u56fe\u6211\u53ea\u5b9a\u4e49\u4e86 \u4e00\u4e2a 64600 \u957f\u5ea6\u7684\u6570\u7ec4\uff0c\u8fd8\u4e0d\u591f 0xFD44 \u5b57\u8282\uff0c\u8fd9\u662f\u56e0\u4e3a\u51fd\u6570\u5185\u90e8\u5f88\u591a\u64cd\u4f5c\u90fd\u4f1a\u7528\u5230\u6808\u5185\u5b58\uff0c\u4e0d\u53ea\u662f\u5c40\u90e8\u53d8\u91cf\u3002<\/p>\n\n\n\n<p>\u4e0a\u56fe\u7684\u4ee3\u7801\uff0c\u6211\u8fd0\u884c\u4e00\u4e0b\uff0c\u5982\u4e0b\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"772\" height=\"198\" src=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/st-19-3.png\" alt=\"\" class=\"wp-image-1368\" srcset=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/st-19-3.png 772w, https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/st-19-3-300x77.png 300w, https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/st-19-3-768x197.png 768w\" sizes=\"auto, (max-width: 772px) 100vw, 772px\" \/><\/figure>\n\n\n\n<p>\u53ef\u4ee5\u6b63\u5e38\u6253\u5370\uff0c\u6ca1\u95ee\u9898\uff0c\u6240\u4ee5\u5728\u6211\u7684\u73af\u5883\u91cc\u9762 64600 \u957f\u5ea6\u7684\u8fd8\u53ef\u4ee5\u63a5\u53d7\uff0c\u5982\u679c\u662f\u5176\u4ed6\u7684\u7535\u8111\uff0c\u8fd9\u4e2a\u6570\u503c\u4f1a\u6709\u4e00\u70b9\u70b9\u504f\u5dee\u3002<\/p>\n\n\n\n<p>\u8fd9\u65f6\u5019\uff0c\u5982\u679c\u6211\u628a 64600 \u6539\u6210 64700 \uff0c\u52a0 100 \u5b57\u8282\uff0c\u5c31\u4f1a\u91cc\u9762\u62a5\u9519\uff0c\u5982\u4e0b\u56fe\uff1a<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"772\" height=\"211\" src=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/st-19-4.png\" alt=\"\" class=\"wp-image-1369\" srcset=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/st-19-4.png 772w, https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/st-19-4-300x82.png 300w, https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/st-19-4-768x210.png 768w\" sizes=\"auto, (max-width: 772px) 100vw, 772px\" \/><\/figure>\n\n\n\n<p>\u56e0\u4e3a\u8bbf\u95ee\u4e86\u6536\u4fdd\u62a4\u7684\u5185\u5b58\uff0c\u5982\u679c\u771f\u7684\u6709\u9700\u8981\u66f4\u5927\u7684\u5185\u5b58\uff0c\u600e\u4e48\u529e\uff1f<code class=\"prettyprint\" >st_thread_create()<\/code> \u51fd\u6570\u662f\u6709\u4e00\u4e2a\u53c2\u6570\u53ef\u4ee5\u5b9a\u4e49\u7533\u8bf7\u7684\u6808\u5927\u5c0f\u7684\uff0c\u5982\u4e0b\u56fe\uff0c\u628a\u8fd9\u4e2a\u503c\u6539\u5927\u5c31\u53ef\u4ee5\u4e86\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"619\" height=\"159\" src=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/st-19-5.png\" alt=\"\" class=\"wp-image-1370\" srcset=\"https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/st-19-5.png 619w, https:\/\/www.xianwaizhiyin.net\/wp-content\/uploads\/2022\/03\/st-19-5-300x77.png 300w\" sizes=\"auto, (max-width: 619px) 100vw, 619px\" \/><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<p>\u6709\u51e0\u79cd\u60c5\u51b5\uff0c\u4f1a\u4f7f\u7528 \u534f\u7a0b\u51fd\u6570\u7684\u6808\u5185\u5b58\u3002<\/p>\n\n\n\n<p>1\uff0c\u534f\u7a0b\u51fd\u6570\u5185\u90e8\u8c03\u7528\u51fd\u6570\uff0c\u4f8b\u5982\u8c03 <code class=\"prettyprint\" >printf()<\/code> \u3002<\/p>\n\n\n\n<p>2\uff0c\u534f\u7a0b\u51fd\u6570\u5185\u90e8\u4f7f\u7528\u5c40\u90e8\u53d8\u91cf\u3002<\/p>\n\n\n\n<p>3\uff0c\u534f\u7a0b\u51fd\u6570\u5185\u90e8\u5f88\u591a\u64cd\u4f5c\u90fd\u4f1a\u7528\u5230 \u6808\u5185\u5b58\uff0c\u4e00\u4e2a <code class=\"prettyprint\" >if<\/code> \u90fd\u6709\u53ef\u80fd\u7528\u5230\u6808\u5185\u5b58\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<p>\u76f8\u5173\u9605\u8bfb\uff1a<\/p>\n\n\n\n<ol class=\"wp-block-list\"><li><a href=\"https:\/\/blog.csdn.net\/unix21\/article\/details\/8450042\">\u300aLinux\u4e2dmprotect()\u51fd\u6570\u8be6\u89e3\u300b<\/a><\/li><\/ol>\n\n\n\n<hr class=\"wp-block-separator has-css-opacity\"\/>\n\n\n\n<p>\u7531\u4e8e\u7b14\u8005\u7684\u6c34\u5e73\u6709\u9650\uff0c \u52a0\u4e4b\u7f16\u5199\u7684\u540c\u65f6\u8fd8\u8981\u53c2\u4e0e\u5f00\u53d1\u5de5\u4f5c\uff0c\u6587\u4e2d\u96be\u514d\u4f1a\u51fa\u73b0\u4e00\u4e9b\u9519\u8bef\u6216\u8005\u4e0d\u51c6\u786e\u7684\u5730\u65b9\uff0c\u6073\u8bf7\u8bfb\u8005\u6279\u8bc4\u6307\u6b63\u3002\u5982\u679c\u8bfb\u8005\u6709\u4efb\u4f55\u5b9d\u8d35\u610f\u89c1\uff0c\u53ef\u4ee5\u52a0\u6211\u5fae\u4fe1 Loken1\u3002QQ\uff1a2338195090\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u300aST\u6e90\u7801\u5206\u6790-st_thread_create\u300b\u8ddf \u300aST\u6e90\u7801\u5206\u6790-\u5185\u5b58\u4fdd\u62a4\u300b\u4e24\u7bc7\u6587\u7ae0\uff0c\u8bb2\u89e3\u4e86\uff0c\u534f\u7a0b\u51fd\u6570\u7684\u6808 [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[24],"tags":[],"class_list":["post-1363","post","type-post","status-publish","format-standard","hentry","category-state-thread-analysis"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v18.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>ST\u6e90\u7801\u5206\u6790-\u534f\u7a0b\u5c40\u90e8\u53d8\u91cf - \u5f26\u5916\u4e4b\u97f3<\/title>\n<meta name=\"description\" content=\"ST\u6e90\u7801\u5206\u6790-\u534f\u7a0b\u5c40\u90e8\u53d8\u91cf\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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name=\"twitter:data1\" content=\"loken\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.xianwaizhiyin.net\/#website\",\"url\":\"https:\/\/www.xianwaizhiyin.net\/\",\"name\":\"\u5f26\u5916\u4e4b\u97f3\",\"description\":\"FFmpeg\u3001WebRTC\uff0cSRS \u97f3\u89c6\u9891\u3001\u6d41\u5a92\u4f53\u6280\u672f\",\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/www.xianwaizhiyin.net\/?s={search_term_string}\"},\"query-input\":\"required 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