{"id":292,"date":"2026-04-27T17:18:06","date_gmt":"2026-04-27T09:18:06","guid":{"rendered":"https:\/\/blog.higgus17.cloud\/?p=292"},"modified":"2026-05-08T22:45:37","modified_gmt":"2026-05-08T14:45:37","slug":"%e5%a4%9a%e7%ba%bf%e7%a8%8b%e3%80%81%e5%af%b9%e8%b1%a1%e6%a8%a1%e5%9e%8b%e5%92%8c%e9%94%81","status":"publish","type":"post","link":"https:\/\/blog.higgus17.cloud\/?p=292","title":{"rendered":"\u5bf9\u8c61\u6a21\u578b\u548c\u9501"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6211\u4eec\u8fd9\u91cc\u7814\u7a76\u7684\u5bf9\u8c61\u6a21\u578b\u662f\u7ebf\u7a0b\u64cd\u4f5c\u7684\u6700\u57fa\u672c\u7684\u5bf9\u8c61\uff0c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4ece\u6700\u57fa\u7840\u7684\u4ee3\u7801\u5f00\u59cb\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u8fd9\u4e2a\u5b9e\u9a8c\u4e2d\uff0c\u6211\u4eec\u63a2\u7a76\u7684\u4e3b\u8981\u662f Java 8 \u7684\u7279\u6027\uff0c\u4f7f\u7528\u4e86 <code>org.openjdk.jol<\/code> \u5305\u3002\u4ee5\u65e0\u9501\u72b6\u6001\u7684\u5bf9\u8c61\u5728\u5185\u5b58\u4e2d\u7684\u5b9e\u9645\u5b58\u50a8\u60c5\u51b5\u4e3a\u4f8b\u4f5c\u9996\u5148\u7684\u719f\u6089\u3002<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Java \u5bf9\u8c61\u5728\u5185\u5b58\u7684\u5e03\u5c40\u5206\u6790<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u63a5\u4e0b\u6765\u6839\u636e\u5177\u4f53\u7684\u8f93\u51fa\u8fdb\u884c\u5206\u6790\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>java.lang.Object object internals:\nOFF  SZ   TYPE DESCRIPTION               VALUE\n  0   8        (object header: mark)     0x0000000000000001 (non-biasable; age: 0)\n  8   4        (object header: class)    0xf80001e5\n 12   4        (object alignment gap)    \nInstance size: 16 bytes\nSpace losses: 0 bytes internal + 4 bytes external = 4 bytes total<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">OFF \u662f\u504f\u79fb\u91cf\uff0cSZ \u662f\u5927\u5c0f\uff0cTYPE DESCRIPTION\u5219\u662f\u5b9a\u4e49\u4e0e\u63cf\u8ff0\uff0cVALUE \u662f\u5177\u4f53\u7684\u6570\u503c\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u53ef\u4ee5\u770b\u5230\uff0c\u4e00\u4e2a Java 8 \u4e2d\u7684\u5bf9\u8c61\uff0c\u5177\u4f53\u7684\u7ec4\u6210\u6709\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5bf9\u8c61\u5934 Mark Word<\/li>\n\n\n\n<li>\u5bf9\u8c61\u5934\u7c7b\u578b\u6307\u9488 Class Pointer<\/li>\n\n\n\n<li>\u5b57\u8282\u5bf9\u9f50\u586b\u5145<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">\u6574\u4e2a\u5bf9\u8c61\u5360 16 \u5b57\u8282\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bf9\u8c61\u5934 mark\uff0c\u987e\u540d\u601d\u4e49\uff0cmark \u662f\u6807\u8bb0\u7684\u610f\u601d\uff0c\u610f\u5473\u7740\u8fd9 8 \u4e2a\u5b57\u8282\uff0864 \u6bd4\u7279\uff09\u7684\u5185\u5bb9\u662f\u7528\u4e8e\u4f5c\u8be5\u5bf9\u8c61\u5728\u5185\u5b58\u4e2d\u7684\u72b6\u6001\u5b9a\u4e49\u4e0e\u57fa\u672c\u63a7\u5236\u7684\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5bf9\u8c61\u5934\u7c7b\u578b\u6307\u9488 class\uff0c\u5219\u662f\u5177\u4f53\u6307\u5411\u4e86\u67d0\u4e2a class \u5143\u6570\u636e\uff0c\u8fd9\u662f\u4e00\u79cd\u5f15\u7528\u7684\u8bbe\u8ba1\uff0c\u5177\u4f53\u7684\u5b9e\u4f8b\u5bf9\u8c61\u4f1a\u5b58\u50a8\u5728\u5806\u4e2d\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5b57\u8282\u5bf9\u9f50\u586b\u5145\u5219\u662f\u56e0\u4e3a JVM \u5b9e\u73b0\u89c4\u5b9a\u7684\u5185\u5b58\u5bf9\u9f50\u7b56\u7565\uff0c\u5927\u5c0f\u9700\u8981\u662f 8 \u7684\u500d\u6570\u3002\u8fd9\u662f\u4e00\u79cd\u4fdd\u969c\u624b\u6bb5\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5c3d\u7ba1\u5728\u8f93\u51fa\u4e2d\u662f\u5b83\u4eec\u662f\u4ee5\u5341\u8fdb\u5236\u5c55\u793a\u7684\uff0c\u4f46\u662f\u5728 JVM \u4e2d\uff0c\u5b83\u4eec\u6beb\u65e0\u7591\u95ee\u662f\u4e8c\u8fdb\u5236\u7684\u5f62\u5f0f\u3002\u6211\u4eec\u53ef\u4ee5\u7528\u7406\u89e3 HTTP \u534f\u8bae\u7684\u683c\u5f0f\u7684\u65b9\u6cd5\u6765\u7406\u89e3\u5185\u5b58\u5bf9\u8c61\u5e03\u5c40\u3002\u5176\u7279\u6027\u662f\uff1a<strong>\u56fa\u5b9a\u4f4d\u7f6e\u3001\u56fa\u5b9a\u957f\u5ea6\u3001\u6bcf\u4e2a\u6bd4\u7279\u4f4d\u90fd\u6709\u56fa\u5b9a\u542b\u4e49\u3002<\/strong>JVM \u53ef\u4ee5\u8f7b\u677e\u5730\u901a\u8fc7\u8fd9\u4e9b\u56fa\u5b9a\u7684\u6bd4\u7279\u4f4d\u6765\u2308\u89e3\u6790\u230b\u5bf9\u8c61\u7684\u5143\u6570\u636e\uff0c\u5c31\u50cf Web \u670d\u52a1\u5668\u89e3\u6790 HTTP \u8bf7\u6c42\u5934\u4e00\u6837\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\u5341\u516d\u8fdb\u5236: 0x0000000000000001\n\u4e8c\u8fdb\u5236: ... 0000 0001\n\u6700\u540e 2 \u4f4d: 01<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5c06\u5bf9\u8c61\u5934 mark word \u7684 Value \u4ece\u5341\u8fdb\u5236\u8f6c\u5230\u4e8c\u8fdb\u5236\u4e4b\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230\u4e8c\u8fdb\u5236\u7684\u672b\u5c3e\u4e3a 01\uff0c\u5bf9\u5e94\u7684\u5185\u5bb9\u5b9a\u4e49\u662f<strong>\u65e0\u9501\u6001<\/strong>\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/blog.higgus17.cloud\/wp-content\/uploads\/2026\/04\/image-1.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"979\" height=\"350\" data-original=\"https:\/\/blog.higgus17.cloud\/wp-content\/uploads\/2026\/04\/image-1.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-307\"  sizes=\"auto, (max-width: 979px) 100vw, 979px\" \/><\/div><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u800c\u5728\u8f7b\u91cf\u7ea7\u9501\u8fdb\u884c\u7ed1\u5b9a\u540e\uff0c\u6211\u4eec\u53ef\u4ee5\u770b\u5230\u4e0d\u4e00\u6837\u7684\u7ed3\u679c\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>java.lang.Object object internals:\nOFF  SZ   TYPE DESCRIPTION               VALUE\n  0   8        (object header: mark)     0x000000970fdff488 (thin lock: 0x000000970fdff488)\n  8   4        (object header: class)    0xf80001e5\n 12   4        (object alignment gap)    \nInstance size: 16 bytes\nSpace losses: 0 bytes internal + 4 bytes external = 4 bytes total\n\n\u5341\u516d\u8fdb\u5236: 0x000000970fdff488\n\u4e8c\u8fdb\u5236: ... 1000 1000\n\u6700\u540e 2 \u4f4d: 00<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u8fd9\u91cc\uff0c\u5341\u8fdb\u5236\u7684\u672b\u4f4d 8 \u5bf9\u5e94\u7740 1000\uff0c\u672b\u4e24\u4f4d\u662f 00\uff0c\u5bf9\u5e94 JVM \u4e2d\u7684\u5b9a\u4e49\uff0c\u6211\u4eec\u53ef\u4ee5\u5f88\u5feb\u77e5\u9053\u8fd9\u662f\u4e00\u4e2a\u7ed1\u5b9a\u4e86\u8f7b\u91cf\u7ea7\u9501\u7684\u5bf9\u8c61\u3002\u901a\u8fc7\u5b9a\u4e49\u80fd\u5f97\u77e5\u8fd8\u53ef\u77e5\u9053\u8be5\u6307\u9488\u7684\u503c\uff0c\u5728 64 \u4f4d\u865a\u62df\u673a\u4e2d\u7684\u5f53\u524d\u8f7b\u91cf\u9501\u60c5\u666f\uff0c\u4e5f\u5c31\u662f\u524d 62 \u4f4d\uff0c\u901a\u8fc7\u8be5\u6307\u9488\u53ef\u4ee5\u627e\u5230\u5176\u5f15\u7528\u7684\u5177\u4f53\u5185\u5bb9\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u5728\u8fd9\u91cc\uff0c\u6211\u4eec\u4f1a\u53d1\u73b0\u4e00\u4e2a\u6709\u8da3\u7684\u60c5\u51b5\u3002\u5728\u4e00\u822c\u6ca1\u6709\u9501\u7684\u60c5\u51b5\u4e0b\uff0c\u539f\u672c\u5bf9\u8c61\u5934 mark word \u4e2d\u5b58\u50a8\u4e86\u54c8\u5e0c\u503c\uff08<em>\u503c\u5f97\u4e00\u63d0\u7684\u662f\uff0c\u53ea\u6709\u5b9e\u4f8b\u5316\u4e86\u7684\u5bf9\u8c61\u624d\u6709\u54c8\u5e0c\u503c\uff0c\u4e00\u4e2a\u7c7b\u662f\u6ca1\u6709\u54c8\u5e0c\u503c\u7684<\/em>\uff09\u3001\u5e74\u4ee3\u76f8\u5173\u7684\u4fe1\u606f\uff0c\u4f46\u662f\u4e0a\u9501\u540e\u5168\u90e8\u53d8\u6210\u4e86\u6307\u9488\u7684\u5185\u5bb9\uff0c\u539f\u672c\u7684\u4fe1\u606f\u53bb\u4e86\u54ea\u91cc\uff1f<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e8b\u5b9e\u4e0a\uff0c\u8fd9\u4e9b\u4fe1\u606f\u88ab\u62f7\u8d1d\u8fdb\u5165\u4e86\u7ebf\u7a0b\u7ef4\u62a4\u7684\u6808\u4e2d\uff0c\u8fd9\u4e2a\u6808\u662f\u79c1\u6709\u7684\uff0c\u4e5f\u5c31\u662f\u7531\u7ebf\u7a0b\u81ea\u5df1\u7ba1\u7406\u3001\u7ef4\u62a4\u548c\u64cd\u4f5c\u7684\u3002\u5728\u6808\u4e2d\u6709\u4e00\u4e2a Lock Record \u6a21\u5757\uff0c\u5728\u8fd9\u91cc\u5b58\u50a8\u4e86\u539f\u672c\u7ef4\u62a4\u7684\u5bf9\u8c61\u5728\u5185\u5b58\u4e2d\u7684\u4e00\u7cfb\u5217\u72b6\u6001\u6570\u636e\u3002<strong>\u5f53\u9501\u91ca\u653e\u65f6\uff0cJVM \u4f1a\u901a\u8fc7 CAS \u64cd\u4f5c\u5c06 Lock Record \u4e2d\u5907\u4efd\u7684\u539f\u59cb\u6570\u636e\u6062\u590d\u5230\u5bf9\u8c61\u5934\u7684 Mark Word \u4e2d\u3002<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<details class=\"wp-block-details is-layout-flow wp-block-details-is-layout-flow\"><summary>\u5b9e\u9a8c\u5b8c\u6574\u8f93\u51fa<\/summary>\n<pre class=\"wp-block-code\"><code>=== 1.\u6ca1\u6709\u9501\u7684\u72b6\u6001 ===\njava.lang.Object object internals:\nOFF  SZ   TYPE DESCRIPTION               VALUE\n  0   8        (object header: mark)     0x0000000000000001 (non-biasable; age: 0)\n  8   4        (object header: class)    0xf80001e5\n 12   4        (object alignment gap)    \nInstance size: 16 bytes\nSpace losses: 0 bytes internal + 4 bytes external = 4 bytes total\n\n=== 2. \u4e3b\u7ebf\u7a0b\u6301\u6709\u9501\uff08\u8f7b\u91cf\u7ea7\u9501\uff09 ===\njava.lang.Object object internals:\nOFF  SZ   TYPE DESCRIPTION               VALUE\n  0   8        (object header: mark)     0x000000970fdff488 (thin lock: 0x000000970fdff488)\n  8   4        (object header: class)    0xf80001e5\n 12   4        (object alignment gap)    \nInstance size: 16 bytes\nSpace losses: 0 bytes internal + 4 bytes external = 4 bytes total\n\n=== 3. \u91ca\u653e\u9501\u540e ===\njava.lang.Object object internals:\nOFF  SZ   TYPE DESCRIPTION               VALUE\n  0   8        (object header: mark)     0x0000000000000001 (non-biasable; age: 0)\n  8   4        (object header: class)    0xf80001e5\n 12   4        (object alignment gap)    \nInstance size: 16 bytes\nSpace losses: 0 bytes internal + 4 bytes external = 4 bytes total\n<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n<\/details>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">CAS \u81ea\u65cb\u9501<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">CAS\uff08<strong>Compare And Swap<\/strong>\uff09\uff0c\u662f\u4e00\u79cd\u5728\u8ba1\u7b97\u673a\u5185\u90e8\u5b9e\u73b0\u7684\u539f\u5b50\u64cd\u4f5c\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u81ea\u65cb\uff0c\u4e5f\u5c31\u662f\u7a7a\u8f6c\u3002\u81ea\u65cb\u7b56\u7565\u5b9e\u9645\u4e0a\u662f\u610f\u5728\u907f\u514d\u7ebf\u7a0b\u88ab\u9891\u7e41\u6302\u8d77\u548c\u5524\u9192\uff0c\u4ece\u800c\u66f4\u6709\u6548\u5730\u5229\u7528\u7cfb\u7edf\u7684\u8d44\u6e90\uff0c\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u8d44\u6e90\u8c03\u5ea6\u635f\u5931\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e5f\u5c31\u662f\u8bf4\uff0cCAS \u81ea\u65cb\u9501\u5b9e\u9645\u4e0a\u662f\u4e3a\u4e86\u4e24\u4e2a\u76ee\u7684\uff1a<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>\u9501\u7684\u6838\u5fc3\u76ee\u7684\u662f&#8221;\u4fdd\u62a4\u6570\u636e\u5b89\u5168&#8221;\uff08\u6b63\u786e\u6027\uff09\u3002<\/strong><\/li>\n\n\n\n<li><strong>\u81ea\u65cb\/\u6302\u8d77\u7b56\u7565\u7684\u9009\u62e9\u662f&#8221;\u4e3a\u4e86\u6027\u80fd\u4f18\u5316&#8221;\uff08\u6548\u7387\uff09\u3002<\/strong><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>\u6211\u4eec\u8fd9\u91cc\u7814\u7a76\u7684\u5bf9\u8c61\u6a21\u578b\u662f\u7ebf\u7a0b\u64cd\u4f5c\u7684\u6700\u57fa\u672c\u7684\u5bf9\u8c61\uff0c \u4ece\u6700\u57fa\u7840\u7684\u4ee3\u7801\u5f00\u59cb\u3002 \u5728\u8fd9\u4e2a\u5b9e\u9a8c\u4e2d\uff0c\u6211\u4eec\u63a2\u7a76\u7684\u4e3b\u8981\u662f Jav [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[8,6],"tags":[],"class_list":["post-292","post","type-post","status-publish","format-standard","hentry","category-java-","category-tech"],"_links":{"self":[{"href":"https:\/\/blog.higgus17.cloud\/index.php?rest_route=\/wp\/v2\/posts\/292","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.higgus17.cloud\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.higgus17.cloud\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.higgus17.cloud\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.higgus17.cloud\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=292"}],"version-history":[{"count":20,"href":"https:\/\/blog.higgus17.cloud\/index.php?rest_route=\/wp\/v2\/posts\/292\/revisions"}],"predecessor-version":[{"id":368,"href":"https:\/\/blog.higgus17.cloud\/index.php?rest_route=\/wp\/v2\/posts\/292\/revisions\/368"}],"wp:attachment":[{"href":"https:\/\/blog.higgus17.cloud\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=292"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.higgus17.cloud\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=292"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.higgus17.cloud\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=292"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}