{"id":4088,"date":"2024-04-22T08:30:27","date_gmt":"2024-04-22T00:30:27","guid":{"rendered":"https:\/\/xinchewhd.com.cn\/index.php\/%e9%9d%a2%e8%af%95\/%e5%ad%97%e8%8a%82%e9%9d%a2%e8%af%95%e9%a2%98%ef%bc%9a%e7%ae%80%e8%a6%81%e8%af%b4%e6%98%8ejava%e4%b8%ad%e5%8f%af%e8%be%be%e6%80%a7%e5%88%86%e6%9e%90%ef%bc%88reachability-analysis%ef%bc%89%e7%9a%84\/"},"modified":"2024-04-22T08:30:27","modified_gmt":"2024-04-22T00:30:27","slug":"%e5%ad%97%e8%8a%82%e9%9d%a2%e8%af%95%e9%a2%98%ef%bc%9a%e7%ae%80%e8%a6%81%e8%af%b4%e6%98%8ejava%e4%b8%ad%e5%8f%af%e8%be%be%e6%80%a7%e5%88%86%e6%9e%90%ef%bc%88reachability-analysis%ef%bc%89%e7%9a%84","status":"publish","type":"post","link":"https:\/\/xinchewhd.com.cn\/index.php\/%e9%9d%a2%e8%af%95\/%e5%ad%97%e8%8a%82%e9%9d%a2%e8%af%95%e9%a2%98%ef%bc%9a%e7%ae%80%e8%a6%81%e8%af%b4%e6%98%8ejava%e4%b8%ad%e5%8f%af%e8%be%be%e6%80%a7%e5%88%86%e6%9e%90%ef%bc%88reachability-analysis%ef%bc%89%e7%9a%84\/","title":{"rendered":"\u5b57\u8282\u9762\u8bd5\u9898\uff1a\u7b80\u8981\u8bf4\u660eJava\u4e2d\u53ef\u8fbe\u6027\u5206\u6790\uff08Reachability Analysis\uff09\u7684\u5de5\u4f5c\u539f\u7406"},"content":{"rendered":"
\n

Java\u4e2d\u7684\u53ef\u8fbe\u6027\u5206\u6790<\/strong>\uff08Reachability Analysis\uff09\u662f\u5783\u573e\u6536\u96c6\u5668\u7528\u6765\u5224\u65ad\u5bf9\u8c61\u662f\u5426\u5b58\u6d3b\u7684\u4e00\u79cd\u7b97\u6cd5\u3002\u5176\u6838\u5fc3\u601d\u60f3\u662f\u901a\u8fc7\u4e00\u7cfb\u5217\u79f0\u4e3a\u201cGC Roots\u201d\u7684\u5bf9\u8c61\u4f5c\u4e3a\u8d77\u70b9\uff0c\u8ddf\u8e2a\u5f15\u7528\u94fe\uff0c\u5982\u679c\u4e00\u4e2a\u5bf9\u8c61\u5230GC Roots\u6ca1\u6709\u4efb\u4f55\u5f15\u7528\u94fe\uff0c\u5219\u8ba4\u4e3a\u6b64\u5bf9\u8c61\u662f\u4e0d\u53ef\u8fbe\u7684\uff0c\u5373\u53ef\u56de\u6536\u7684\u3002<\/span><\/p>\n

GC Roots\u5305\u62ec\uff1a<\/span><\/strong><\/h3>\n
    \n
  1. \n

    \u672c\u5730\u53d8\u91cf\u8868<\/span>\u4e2d\u5f15\u7528\u7684\u5bf9\u8c61\uff0c\u5373\u5f53\u524d\u6fc0\u6d3b\u7ebf\u7a0b\u7684\u5c40\u90e8\u53d8\u91cf\u3002<\/span><\/p>\n<\/li>\n

  2. \n

    \u65b9\u6cd5\u533a<\/span>\u4e2d\u7c7b\u9759\u6001\u5c5e\u6027\u5f15\u7528\u7684\u5bf9\u8c61\uff0c\u5982Java\u7c7b\u7684\u5f15\u7528\u7c7b\u578b\u9759\u6001\u53d8\u91cf\u3002<\/span><\/p>\n<\/li>\n

  3. \n

    \u65b9\u6cd5\u533a<\/span>\u4e2d\u5e38\u91cf\u5f15\u7528\u7684\u5bf9\u8c61\uff0c\u5982\u5b57\u7b26\u4e32\u5e38\u91cf\u6c60\u91cc\u7684\u5f15\u7528\u3002<\/span><\/p>\n<\/li>\n

  4. \n

    \u672c\u5730\u65b9\u6cd5\u6808<\/span>\u4e2dJNI\uff08\u5373\u901a\u5e38\u6240\u8bf4\u7684Native\u65b9\u6cd5\uff09\u5f15\u7528\u7684\u5bf9\u8c61\u3002<\/span><\/p>\n<\/li>\n<\/ol>\n

    \u53ef\u8fbe\u6027\u5206\u6790\u8fc7\u7a0b\uff1a<\/span><\/strong><\/h3>\n
      \n
    1. \n

      \u6807\u8bb0\u9636\u6bb5<\/span>\uff1a\u4ece\u6240\u6709GC Roots\u5f00\u59cb\uff0c\u904d\u5386\u8fd9\u4e9b\u8282\u70b9\u6240\u5f15\u7528\u7684\u5bf9\u8c61\uff0c\u7136\u540e\u662f\u8fd9\u4e9b\u5bf9\u8c61\u5f15\u7528\u7684\u5bf9\u8c61\uff0c\u4f9d\u6b64\u7c7b\u63a8\u3002\u6bcf\u8bbf\u95ee\u4e00\u4e2a\u5bf9\u8c61\uff0c\u5c31\u5c06\u5176\u6807\u8bb0\u4e3a\u6d3b\u52a8\u5bf9\u8c61\uff0c\u8fd9\u4e2a\u8fc7\u7a0b\u662f\u9012\u5f52\u7684\u3002<\/span><\/p>\n<\/li>\n

    2. \n

      \u505c\u6b62-\u590d\u5236\uff08Stop-and-Copy\uff09\u6216 \u6807\u8bb0-\u6e05\u9664\uff08Mark-and-Sweep\uff09<\/span>\uff1a\u5728\u6807\u8bb0\u5b8c\u6210\u540e\uff0c\u672a\u88ab\u6807\u8bb0\u7684\u5bf9\u8c61\u4f1a\u88ab\u5783\u573e\u56de\u6536\u5668\u56de\u6536\u3002\u5177\u4f53\u91c7\u53d6\u54ea\u79cd\u56de\u6536\u7b56\u7565\uff0c\u53d6\u51b3\u4e8e\u56de\u6536\u5668\u7684\u7c7b\u578b\u548c\u5185\u5b58\u60c5\u51b5\u3002<\/span><\/p>\n<\/li>\n

    3. \n
      \u53ef\u8fbe\u6027\u7684\u7ea7\u522b<\/span>\uff1a<\/span><\/section>\n<\/li>\n
        \n
      • \n

        \u53ef\u76f4\u63a5\u8bbf\u95ee<\/span>\uff1a\u4eceGC Roots\u76f4\u63a5\u5f15\u7528\u7684\u5bf9\u8c61\u3002<\/span><\/p>\n<\/li>\n

      • \n

        \u95f4\u63a5\u53ef\u8bbf\u95ee<\/span>\uff1a\u901a\u8fc7\u4e00\u7cfb\u5217\u7684\u5f15\u7528\u94fe\u53ef\u4ee5\u4eceGC Roots\u5230\u8fbe\u7684\u5bf9\u8c61\u3002<\/span><\/p>\n<\/li>\n

      • \n

        \u4e0d\u53ef\u8bbf\u95ee<\/span>\uff1aGC Roots\u65e0\u6cd5\u5230\u8fbe\u7684\u5bf9\u8c61\u3002<\/span><\/p>\n

        \u4f8b\u5b50\u8be6\u89e3\uff1a<\/span><\/strong><\/h3>\n

        \u8003\u8651\u4ee5\u4e0bJava\u4ee3\u7801\u7247\u6bb5\uff1a<\/span><\/p>\n

        \n
          \n
        • <\/li>\n
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        • <\/li>\n<\/ul>\n
          public<\/span> class<\/span> GCRootsExample<\/span> {<\/span><\/code>    private<\/span> static<\/span> GCRootsExample staticVariable;<\/span><\/code><\/span><\/code>    public<\/span> void<\/span> gcRootsTestMethod<\/span>(<\/span>)<\/span> {<\/span><\/code>        GCRootsExample localVariable = new<\/span> GCRootsExample();<\/span><\/code>        System.gc(); \/\/ \u7b2c1\u6b21GC\u8c03\u7528<\/span><\/span><\/code>        \/\/ \u66f4\u591a\u64cd\u4f5c...<\/span><\/span><\/code>    }<\/span><\/code><\/span><\/code>    public<\/span> static<\/span> void<\/span> main<\/span>(String[] args<\/span>)<\/span> {<\/span><\/code>        GCRootsExample gcre = new<\/span> GCRootsExample();<\/span><\/code>        gcre.gcRootsTestMethod();<\/span><\/code>        System.gc(); \/\/ \u7b2c2\u6b21GC\u8c03\u7528<\/span><\/span><\/code>        \/\/ \u66f4\u591a\u64cd\u4f5c...<\/span><\/span><\/code>    }<\/span><\/code>}<\/span><\/code><\/pre>\n<\/section>\n
          <\/span>\u5728\u4e0a\u8ff0\u4ee3\u7801\u4e2d\uff1a<\/span><\/p>\n
            \n
          • \n
            \u7b2c1\u6b21GC\u8c03\u7528<\/span>: \u5728<\/span>gcRootsTestMethod<\/span><\/code>\u65b9\u6cd5\u6267\u884c\u671f\u95f4\uff0c<\/span>localVariable<\/span><\/code>\u662f\u4e00\u4e2a\u6d3b\u52a8\u7684\u672c\u5730\u53d8\u91cf\uff0c\u5e76\u4e14\u5b83\u6307\u5411\u4e00\u4e2a<\/span>GCRootsExample<\/span><\/code>\u5b9e\u4f8b\u3002\u56e0\u6b64\uff0c\u5728\u7b2c1\u6b21\u8c03\u7528<\/span>System.gc()<\/span><\/code>\u65f6\uff0c\u7531<\/span>localVariable<\/span><\/code>\u5f15\u7528\u7684<\/span>GCRootsExample<\/span><\/code>\u5bf9\u8c61\u662f\u4e0d\u4f1a\u88ab\u56de\u6536\u7684\uff0c\u5b83\u901a\u8fc7<\/span>localVariable<\/span><\/code>\u4e0eGC Roots\u76f8\u8fde\u3002<\/span><\/p>\n<\/li>\n
          • \n
            \u65b9\u6cd5\u8fd4\u56de\u540e\uff0c\u5047\u8bbe\u6211\u4eec\u53c8\u56de\u5230\u4e86<\/span>main<\/span><\/code>\u65b9\u6cd5\uff0c\u5e76\u4e14\u6ca1\u6709\u5176\u4ed6\u5bf9<\/span>localVariable<\/span><\/code>\u7684\u5f15\u7528\uff0c\u90a3\u4e48<\/span>localVariable<\/span><\/code>\u5f15\u7528\u7684<\/span>GCRootsExample<\/span><\/code>\u5bf9\u8c61\u73b0\u5728\u5df2\u7ecf\u4e0d\u518d\u6709\u4efb\u4f55\u672c\u5730\u53d8\u91cf\u8868\u4e2d\u7684\u5f15\u7528\u3002\u6b64\u65f6<\/span>localVariable<\/span><\/code>\u8d85\u51fa\u4e86\u4f5c\u7528\u57df\uff0c\u8be5\u5bf9\u8c61\u53d8\u5f97\u4e0d\u53ef\u8bbf\u95ee\u4e86\u3002<\/span><\/p>\n<\/li>\n
          • \n
            \u7b2c2\u6b21GC\u8c03\u7528<\/span>: \u5728<\/span>main<\/span><\/code>\u65b9\u6cd5\u4e2d\uff0c\u5c3d\u7ba1\u6211\u4eec\u521b\u5efa\u4e86\u4e00\u4e2a<\/span>GCRootsExample<\/span><\/code>\u5b9e\u4f8b<\/span>gcre<\/span><\/code>\uff0c\u4f46\u662f\u5728\u8c03\u7528\u5b8c<\/span>gcRootsTestMethod<\/span><\/code>\u4e4b\u540e\uff0c\u5e76\u6ca1\u6709\u5bf9<\/span>gcre<\/span><\/code>\u8fdb\u884c\u4efb\u4f55\u64cd\u4f5c\uff0c\u4e5f\u6ca1\u6709\u518d\u4f20\u9012\u5f15\u7528\u3002\u5982\u679c<\/span>main<\/span><\/code>\u65b9\u6cd5\u4e4b\u540e\u6ca1\u6709\u5bf9<\/span>gcre<\/span><\/code>\u7684\u5f15\u7528\uff08\u5373\u4f7f\u5b83\u662f\u4e00\u4e2a\u9759\u6001\u53d8\u91cf\uff09\uff0c\u5219<\/span>gcre<\/span><\/code>\u53ef\u80fd\u88ab\u89c6\u4e3a\u5783\u573e\u5e76\u88ab\u6536\u96c6\u3002\u7136\u800c\uff0c\u5982\u679c<\/span>staticVariable<\/span><\/code>\u4ecd\u7136\u4fdd\u6301\u7740\u5bf9\u67d0\u4e2a<\/span>GCRootsExample<\/span><\/code>\u5b9e\u4f8b\u7684\u5f15\u7528\uff0c\u90a3\u4e48\u8fd9\u4e2a\u5b9e\u4f8b\u5c06\u4e0d\u4f1a\u88ab\u56de\u6536\uff0c\u56e0\u4e3a\u9759\u6001\u53d8\u91cf\u662fGC Roots\u7684\u4e00\u90e8\u5206\u3002<\/span><\/p>\n<\/li>\n<\/ul>\n
            \u53ef\u8fbe\u6027\u5206\u6790\u7684\u8fd0\u884c\u539f\u7406\u786e\u4fdd\u4e86\u53ea\u6709\u90a3\u4e9b\u4e0d\u518d\u88ab\u4efb\u4f55\u7ebf\u7a0b\u3001\u9759\u6001\u5f15\u7528\u7b49\u6240\u4f7f\u7528\u7684\u5bf9\u8c61\u624d\u4f1a\u88ab\u5783\u573e\u56de\u6536\uff0c\u800c\u8fd9\u6837\u7684\u5224\u5b9a\u662f\u901a\u8fc7\u4e00\u7cfb\u5217\u7684\u5bf9\u8c61\u5f15\u7528\u94fe\u6765\u5b9e\u73b0\u7684\u3002\u8fd9\u4e5f\u610f\u5473\u7740\uff0c\u5faa\u73af\u5f15\u7528\u7684\u5bf9\u8c61\uff0c\u5982\u679c\u6ca1\u6709\u4efb\u4f55\u5916\u90e8\u5f15\u7528\u6307\u5411\u5b83\u4eec\u7684\u5f15\u7528\u94fe\uff0c\u540c\u6837\u4f1a\u88ab\u56de\u6536\u3002<\/span><\/p>\n
            <\/mp-style-type><\/p>\n
            \n
            \u672c\u7bc7\u6587\u7ae0\u6765\u6e90\u4e8e\u5fae\u4fe1\u516c\u4f17\u53f7:                 \u4e92\u8054\u7f51\u9762\u8bd5\u5c0f\u5e2e\u624b              <\/p>\n<\/blockquote>\n<\/div>\n","raw":"","protected":false},"excerpt":{"rendered":"
            Java\u4e2d\u7684\u53ef\u8fbe\u6027\u5206\u6790\uff08Reachability Analysis\uff09\u662f\u5783\u573e\u6536\u96c6\u5668\u7528\u6765\u5224\u65ad\u5bf9\u8c61\u662f\u5426\u5b58\u6d3b\u7684\u4e00\u79cd\u7b97\u6cd5\u3002\u5176\u6838\u5fc3\u601d\u60f3\u662f\u901a\u8fc7\u4e00 …<\/p>\n","protected":false},"author":1,"featured_media":4084,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"emotion":"","emotion_color":"","title_style":"","license":"","footnotes":""},"categories":[30],"tags":[],"class_list":["post-4088","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-30"],"post_thumbnail_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2024\/05\/20240524145038302-150x150.jpeg","content_first_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2024\/05\/20240524145042864.png","post_medium_image_300":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2024\/05\/20240524145038302-300x128.jpeg","post_thumbnail_image_624":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2024\/05\/20240524145038302.jpeg","post_frist_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2024\/05\/20240524145042864.png","post_medium_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2024\/05\/20240524145038302-300x128.jpeg","post_large_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2024\/05\/20240524145038302.jpeg","post_full_image":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2024\/05\/20240524145038302.jpeg","post_all_images":[{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2024\/05\/20240524145042864.png","id":"image0"},{"imagesurl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2024\/05\/20240524145042864.png","id":"image1"}],"videoAdId":"","listAd":"0","listAdId":"","listAdEvery":6,"total_comments":0,"category_name":"\u9762\u8bd5","post_date":"2024-04-22","like_count":"0","praiseWord":"\u9f13\u52b1","copyright_state":"","excitationAd":"0","rewardedVideoAdId":"","detailAdId":"","detailAd":"0","enterpriseMinapp":"0","audios":[],"postImageUrl":"https:\/\/wp-moto-1258805347.cos.ap-shanghai.myqcloud.com\/2023\/05\/20230519082947553.jpg","avatarurls":[],"related_posts":null,"pageviews":325,"next_post_id":4083,"next_post_title":"\u963f\u91cc\u9762\u8bd5\u9898\uff1aJava\u4e2d\u5982\u4f55\u63d0\u9ad8\u6587\u4ef6\u7684\u8bfb\u5199\u901f\u5ea6\uff1f","previous_post_id":4552,"previous_post_title":"\u9762\u8bd5\u5b98\uff1aRedis\u5982\u4f55\u4fdd\u969c\u9ad8\u53ef\u7528\u7684\uff1fRedis\u4e3b\u4ece\u3001\u54e8\u5175\u3001Redis Cluster\u4f60\u5206\u6e05\u695a\u4e86\u5417\uff1f","_links":{"self":[{"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/posts\/4088","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/comments?post=4088"}],"version-history":[{"count":0,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/posts\/4088\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/media\/4084"}],"wp:attachment":[{"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/media?parent=4088"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/categories?post=4088"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/xinchewhd.com.cn\/index.php\/wp-json\/wp\/v2\/tags?post=4088"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}