{"id":88,"date":"2025-07-16T10:42:23","date_gmt":"2025-07-16T02:42:23","guid":{"rendered":"https:\/\/www.hgfwq.com\/blog\/?p=88"},"modified":"2025-07-16T10:42:23","modified_gmt":"2025-07-16T02:42:23","slug":"linux-vdso-so-1%e5%9c%a8linux%e7%b3%bb%e7%bb%9f%e4%b8%ad%e6%9c%89%e5%93%aa%e4%ba%9b%e9%87%8d%e8%a6%81%e4%bd%9c%e7%94%a8%e5%92%8c%e5%bd%b1%e5%93%8d","status":"publish","type":"post","link":"https:\/\/www.hgfwq.com\/blog\/88.html","title":{"rendered":"linux-vdso.so.1\u5728Linux\u7cfb\u7edf\u4e2d\u6709\u54ea\u4e9b\u91cd\u8981\u4f5c\u7528\u548c\u5f71\u54cd"},"content":{"rendered":"<p><h>\u4ec0\u4e48\u662f\u300alinux-vdso.so.1\u300b<\/h><\/p>\n<p style=\"text-align:center\"><img decoding=\"async\" src=\"https:\/\/www.hgfwq.com\/blog\/wp-content\/uploads\/2025\/07\/67LT3r.jpg\" alt=\"linux-vdso.so.1\u5728Linux\u7cfb\u7edf\u4e2d\u6709\u54ea\u4e9b\u91cd\u8981\u4f5c\u7528\u548c\u5f71\u54cd\" title=\"linux-vdso.so.1\u5728Linux\u7cfb\u7edf\u4e2d\u6709\u54ea\u4e9b\u91cd\u8981\u4f5c\u7528\u548c\u5f71\u54cd\"><\/p>\n<p><p>\u300alinux-vdso.so.1\u300b\u662f\u4e00\u4e2a\u7279\u6b8a\u7684\u5171\u4eab\u5e93\u6587\u4ef6\uff0c\u5b83\u662fLinux\u64cd\u4f5c\u7cfb\u7edf\u4e2d\u7684\u4e00\u4e2a\u865a\u62df\u5171\u4eab\u5bf9\u8c61\uff08vDSO\uff09\u3002vDSO\u662f\u4e00\u79cd\u8f7b\u91cf\u7ea7\u7684\u6280\u672f\uff0c\u5b83\u5141\u8bb8\u64cd\u4f5c\u7cfb\u7edf\u5185\u6838\u7684\u4e00\u90e8\u5206\u76f4\u63a5\u6620\u5c04\u5230\u7528\u6237\u7a7a\u95f4\uff0c\u800c\u4e0d\u662f\u901a\u8fc7\u4f20\u7edf\u7684\u7cfb\u7edf\u8c03\u7528\u3002\u8fd9\u6837\u505a\u7684\u597d\u5904\u662f\u51cf\u5c11\u4e86\u7528\u6237\u7a7a\u95f4\u548c\u5185\u6838\u7a7a\u95f4\u4e4b\u95f4\u7684\u4e0a\u4e0b\u6587\u5207\u6362\uff0c\u4ece\u800c\u63d0\u9ad8\u4e86\u6027\u80fd\u3002<\/p>\n<p>vDSO\u901a\u5e38\u5305\u542b\u4e86\u4e00\u4e9b\u9891\u7e41\u4f7f\u7528\u7684\u7cfb\u7edf\u8c03\u7528\uff0c\u5982\u65f6\u95f4\u3001\u8fdb\u7a0b\u72b6\u6001\u3001\u6587\u4ef6\u63cf\u8ff0\u7b26\u7b49\uff0c\u4f7f\u5f97\u5e94\u7528\u7a0b\u5e8f\u53ef\u4ee5\u76f4\u63a5\u8bbf\u95ee\u8fd9\u4e9b\u529f\u80fd\u800c\u4e0d\u9700\u8981\u901a\u8fc7\u4f20\u7edf\u7684\u7cfb\u7edf\u8c03\u7528\u673a\u5236\u3002\u8fd9\u79cd\u4f18\u5316\u5bf9\u4e8e\u9700\u8981\u9891\u7e41\u8fdb\u884c\u7cfb\u7edf\u8c03\u7528\u7684\u5e94\u7528\u7a0b\u5e8f\u6765\u8bf4\u5c24\u5176\u6709\u7528\u3002<\/p>\n<p><h>\u5982\u4f55\u67e5\u770bvDSO\u7684\u4f7f\u7528\u60c5\u51b5<\/h><\/p>\n<p><p>\u8981\u67e5\u770bvDSO\u7684\u4f7f\u7528\u60c5\u51b5\uff0c\u4f60\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u547d\u4ee4\uff1a<\/p>\n<p>&#8220;`bash<\/p>\n<p> \u67e5\u770b\u5f53\u524d\u8fdb\u7a0b\u7684vDSO\u4fe1\u606f<\/p>\n<p>cat \/proc\/<\/p>\n<p><pid>\/maps | grep &#8216;vdso&#8217;<\/p>\n<p> \u67e5\u770b\u6240\u6709\u8fdb\u7a0b\u7684vDSO\u4fe1\u606f<\/p>\n<p>ps -o rss,vsz,comm= | grep &#8216;vdso&#8217;<\/p>\n<p>&#8220;`<\/p>\n<p>\u5176\u4e2d `<\/p>\n<p><pid>` \u662f\u8fdb\u7a0bID\uff0c`ps` \u547d\u4ee4\u7528\u4e8e\u5217\u51fa\u7cfb\u7edf\u4e2d\u7684\u8fdb\u7a0b\uff0c`grep` \u547d\u4ee4\u7528\u4e8e\u8fc7\u6ee4\u8f93\u51fa\u3002<\/p>\n<p><h>\u5982\u4f55\u542f\u7528\u6216\u7981\u7528vDSO<\/h><\/p>\n<p><p>vDSO\u901a\u5e38\u662f\u81ea\u52a8\u542f\u7528\u7684\uff0c\u4f46\u5982\u679c\u4f60\u9700\u8981\u624b\u52a8\u542f\u7528\u6216\u7981\u7528\u5b83\uff0c\u53ef\u4ee5\u6309\u7167\u4ee5\u4e0b\u6b65\u9aa4\u64cd\u4f5c\uff1a<\/p>\n<p>1. \u7f16\u8f91 `\/etc\/sysctl.conf` \u6587\u4ef6\uff0c\u6dfb\u52a0\u6216\u4fee\u6539\u4ee5\u4e0b\u884c\uff1a<\/p>\n<p>   &#8220;`<\/p>\n<p>   kernel.vdso=1  \u542f\u7528vDSO<\/p>\n<p>    \u6216\u8005<\/p>\n<p>   kernel.vdso=0  \u7981\u7528vDSO<\/p>\n<p>   &#8220;`<\/p>\n<p>2. \u4fdd\u5b58\u6587\u4ef6\u5e76\u9000\u51fa\u7f16\u8f91\u5668\u3002<\/p>\n<p>3. \u4f7f\u7528 `sysctl` \u547d\u4ee4\u4f7f\u66f4\u6539\u751f\u6548\uff1a<\/p>\n<p>   &#8220;`<\/p>\n<p>   sysctl -p<\/p>\n<p>   &#8220;`<\/p>\n<p>4. \u91cd\u542f\u7cfb\u7edf\u4ee5\u4f7f\u66f4\u6539\u6c38\u4e45\u751f\u6548\u3002<\/p>\n<p>\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0c\u7981\u7528vDSO\u53ef\u80fd\u4f1a\u5f71\u54cd\u6027\u80fd\uff0c\u56e0\u4e3a\u5b83\u4f1a\u5f3a\u5236\u5e94\u7528\u7a0b\u5e8f\u4f7f\u7528\u4f20\u7edf\u7684\u7cfb\u7edf\u8c03\u7528\u673a\u5236\u3002<\/p>\n<p><h>\u5982\u4f55\u4f18\u5316vDSO\u7684\u6027\u80fd<\/h><\/p>\n<p><p>vDSO\u7684\u6027\u80fd\u4f18\u5316\u4e3b\u8981\u5173\u6ce8\u4ee5\u4e0b\u51e0\u4e2a\u65b9\u9762\uff1a<\/p>\n<p>1. \u51cf\u5c11\u7cfb\u7edf\u8c03\u7528\uff1a\u901a\u8fc7\u4f18\u5316\u5e94\u7528\u7a0b\u5e8f\u4ee3\u7801\uff0c\u51cf\u5c11\u4e0d\u5fc5\u8981\u7684\u7cfb\u7edf\u8c03\u7528\uff0c\u53ef\u4ee5\u51cf\u5c11\u5bf9vDSO\u7684\u4f9d\u8d56\uff0c\u4ece\u800c\u63d0\u9ad8\u6027\u80fd\u3002<\/p>\n<p>2. \u4f18\u5316\u5185\u5b58\u8bbf\u95ee\uff1a\u786e\u4fdd\u5e94\u7528\u7a0b\u5e8f\u7684\u5185\u5b58\u8bbf\u95ee\u6a21\u5f0f\u4e0evDSO\u7684\u7f13\u5b58\u673a\u5236\u76f8\u5339\u914d\uff0c\u53ef\u4ee5\u51cf\u5c11\u7f13\u5b58\u672a\u547d\u4e2d\uff0c\u63d0\u9ad8\u8bbf\u95ee\u901f\u5ea6\u3002<\/p>\n<p>3. \u76d1\u63a7\u6027\u80fd\uff1a\u5b9a\u671f\u76d1\u63a7\u5e94\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\uff0c\u4f7f\u7528\u5de5\u5177\u5982 `perf` \u6216 `valgrind` \u6765\u8bc6\u522b\u6027\u80fd\u74f6\u9888\u3002<\/p>\n<p>4. \u5185\u6838\u4f18\u5316\uff1a\u6839\u636e\u5e94\u7528\u7a0b\u5e8f\u7684\u7279\u70b9\uff0c\u4f18\u5316\u5185\u6838\u914d\u7f6e\uff0c\u4f8b\u5982\u8c03\u6574\u5185\u5b58\u5206\u914d\u7b56\u7565\u6216\u589e\u52a0\u865a\u62df\u5185\u5b58\u5927\u5c0f\u3002<\/p>\n<p><h>\u95ee\u7b54\u73af\u8282<\/h><\/p>\n<p><p><b>\u95ee\uff1a<\/b>vDSO\u5bf9\u6027\u80fd\u63d0\u5347\u6709\u591a\u5927\uff1f<\/p>\n<p><p>\u7b54\uff1avDSO\u7684\u6027\u80fd\u63d0\u5347\u53d6\u51b3\u4e8e\u5e94\u7528\u7a0b\u5e8f\u7684\u7279\u70b9\u3002\u5bf9\u4e8e\u9891\u7e41\u8fdb\u884c\u7cfb\u7edf\u8c03\u7528\u7684\u5e94\u7528\u7a0b\u5e8f\uff0cvDSO\u53ef\u4ee5\u663e\u8457\u51cf\u5c11\u4e0a\u4e0b\u6587\u5207\u6362\uff0c\u4ece\u800c\u63d0\u9ad8\u6027\u80fd\u3002\u4f46\u5bf9\u4e8e\u4e0d\u5e38\u8c03\u7528\u7cfb\u7edf\u8c03\u7528\u7684\u5e94\u7528\u7a0b\u5e8f\uff0cvDSO\u7684\u6027\u80fd\u63d0\u5347\u53ef\u80fd\u4e0d\u660e\u663e\u3002<\/p>\n<p><p><b>\u95ee\uff1a<\/b>\u4e3a\u4ec0\u4e48\u6211\u7684\u7cfb\u7edf\u4e0a\u6ca1\u6709vDSO\uff1f<\/p>\n<p><p>\u7b54\uff1avDSO\u4e0d\u662f\u6240\u6709Linux\u53d1\u884c\u7248\u90fd\u9ed8\u8ba4\u542f\u7528\u7684\u3002\u5982\u679c\u4f60\u7684\u7cfb\u7edf\u6ca1\u6709vDSO\uff0c\u53ef\u80fd\u662f\u56e0\u4e3a\u4f60\u7684\u5185\u6838\u6ca1\u6709\u652f\u6301\u5b83\uff0c\u6216\u8005\u4f60\u7684\u53d1\u884c\u7248\u6ca1\u6709\u5728\u9ed8\u8ba4\u914d\u7f6e\u4e2d\u542f\u7528\u5b83\u3002\u4f60\u53ef\u4ee5\u901a\u8fc7\u7f16\u8bd1\u5185\u6838\u6216\u4fee\u6539\u7cfb\u7edf\u914d\u7f6e\u6765\u542f\u7528vDSO\u3002<\/p>\n<p><p><b>\u95ee\uff1a<\/b>\u5982\u4f55\u77e5\u9053\u6211\u7684\u5e94\u7528\u7a0b\u5e8f\u662f\u5426\u4f7f\u7528\u4e86vDSO\uff1f<\/p>\n<p><p>\u7b54\uff1a\u4f60\u53ef\u4ee5\u901a\u8fc7\u67e5\u770b\u5e94\u7528\u7a0b\u5e8f\u7684\u5185\u5b58\u6620\u5c04\u6587\u4ef6\u6765\u786e\u8ba4\u662f\u5426\u4f7f\u7528\u4e86vDSO\u3002\u4f7f\u7528 `cat \/proc\/<\/p>\n<p><pid>\/maps` \u547d\u4ee4\uff0c\u5176\u4e2d `<\/p>\n<p><pid>` \u662f\u5e94\u7528\u7a0b\u5e8f\u7684\u8fdb\u7a0bID\uff0c\u5982\u679c\u8f93\u51fa\u4e2d\u5305\u542b `vdso` \u5b57\u6837\uff0c\u5219\u8bf4\u660e\u5e94\u7528\u7a0b\u5e8f\u4f7f\u7528\u4e86vDSO\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4ec0\u4e48\u662f\u300alinux-vdso.so.1\u300b \u300alinux-vdso.so.1\u300b\u662f\u4e00\u4e2a\u7279\u6b8a\u7684\u5171\u4eab\u5e93\u6587\u4ef6\uff0c\u5b83\u662fLinux\u64cd\u4f5c\u7cfb\u7edf\u4e2d\u7684\u4e00\u4e2a\u865a\u62df\u5171\u4eab\u5bf9\u8c61\uff08vDSO\uff09\u3002vDSO\u662f\u4e00\u79cd\u8f7b\u91cf\u7ea7\u7684\u6280\u672f\uff0c\u5b83\u5141\u8bb8\u64cd\u4f5c\u7cfb\u7edf\u5185\u6838\u7684\u4e00\u90e8\u5206\u76f4\u63a5\u6620\u5c04\u5230\u7528\u6237\u7a7a\u95f4\uff0c\u800c\u4e0d\u662f\u901a\u8fc7&#8230;<\/p>\n","protected":false},"author":1,"featured_media":89,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[50,56,55],"topic":[],"class_list":["post-88","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-haiwai","tag-linux","tag-so","tag-vdso"],"_links":{"self":[{"href":"https:\/\/www.hgfwq.com\/blog\/wp-json\/wp\/v2\/posts\/88","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.hgfwq.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.hgfwq.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.hgfwq.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.hgfwq.com\/blog\/wp-json\/wp\/v2\/comments?post=88"}],"version-history":[{"count":1,"href":"https:\/\/www.hgfwq.com\/blog\/wp-json\/wp\/v2\/posts\/88\/revisions"}],"predecessor-version":[{"id":91,"href":"https:\/\/www.hgfwq.com\/blog\/wp-json\/wp\/v2\/posts\/88\/revisions\/91"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.hgfwq.com\/blog\/wp-json\/wp\/v2\/media\/89"}],"wp:attachment":[{"href":"https:\/\/www.hgfwq.com\/blog\/wp-json\/wp\/v2\/media?parent=88"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.hgfwq.com\/blog\/wp-json\/wp\/v2\/categories?post=88"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.hgfwq.com\/blog\/wp-json\/wp\/v2\/tags?post=88"},{"taxonomy":"topic","embeddable":true,"href":"https:\/\/www.hgfwq.com\/blog\/wp-json\/wp\/v2\/topic?post=88"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}