java agent \u7b80\u5355\u4ecb\u7ecd___01___ \u5199\u7b2c\u4e00\u4e2aagent
\nhttps:\/\/www.2cto.com\/kf\/201208\/145697.html
\njavaagent\u52a0\u8f7d\u673a\u5236\u5206\u6790
\nhttp:\/\/www.cnblogs.com\/hellotech\/p\/3952882.html
\nhttp:\/\/nijiaben.iteye.com\/blog\/1847212
\nInstrumentation \u529f\u80fd\u4ecb\u7ecd\uff08javaagent\uff09
\nhttp:\/\/blog.csdn.net\/zhyhang\/article\/details\/17027441
\nJVM\u6e90\u7801\u5206\u6790\u4e4bjavaagent\u539f\u7406\u5b8c\u5168\u89e3\u8bfb
\nhttp:\/\/www.infoq.com\/cn\/articles\/javaagent-illustrated<\/p>\n
java instrument \u521d\u63a2
\nhttp:\/\/blog.csdn.net\/pwlazy\/article\/details\/5109742<\/p>\n
javaagent\u7684\u4e3b\u8981\u529f\u80fd\u5982\u4e0b\uff1a
\n\u53ef\u4ee5\u5728\u52a0\u8f7dclass\u6587\u4ef6\u4e4b\u524d\u505a\u62e6\u622a\uff0c\u5bf9\u5b57\u8282\u7801\u505a\u4fee\u6539
\n\u53ef\u4ee5\u5728\u8fd0\u884c\u671f\u5bf9\u5df2\u52a0\u8f7d\u7c7b\u7684\u5b57\u8282\u7801\u505a\u53d8\u66f4\uff0c\u4f46\u662f\u8fd9\u79cd\u60c5\u51b5\u4e0b\u4f1a\u6709\u5f88\u591a\u7684\u9650\u5236\uff0c\u540e\u9762\u4f1a\u8be6\u7ec6\u8bf4
\n\u8fd8\u6709\u5176\u4ed6\u4e00\u4e9b\u5c0f\u4f17\u7684\u529f\u80fd
\n\u83b7\u53d6\u6240\u6709\u5df2\u7ecf\u52a0\u8f7d\u8fc7\u7684\u7c7b
\n\u83b7\u53d6\u6240\u6709\u5df2\u7ecf\u521d\u59cb\u5316\u8fc7\u7684\u7c7b\uff08\u6267\u884c\u8fc7clinit\u65b9\u6cd5\uff0c\u662f\u4e0a\u9762\u7684\u4e00\u4e2a\u5b50\u96c6\uff09
\n\u83b7\u53d6\u67d0\u4e2a\u5bf9\u8c61\u7684\u5927\u5c0f
\n\u5c06\u67d0\u4e2ajar\u52a0\u5165\u5230bootstrap classpath\u91cc\u4f5c\u4e3a\u9ad8\u4f18\u5148\u7ea7\u88abbootstrapClassloader\u52a0\u8f7d
\n\u5c06\u67d0\u4e2ajar\u52a0\u5165\u5230classpath\u91cc\u4f9bAppClassloard\u53bb\u52a0\u8f7d
\n\u8bbe\u7f6e\u67d0\u4e9bnative\u65b9\u6cd5\u7684\u524d\u7f00\uff0c\u4e3b\u8981\u5728\u67e5\u627enative\u65b9\u6cd5\u7684\u65f6\u5019\u505a\u89c4\u5219\u5339\u914d<\/p>\n
java.lang.instrument \u505a\u52a8\u6001 Instrumentation \u662f Java SE 5 \u7684\u65b0\u7279\u6027\uff0c\u5b83\u628a Java \u7684 instrument \u529f\u80fd\u4ece\u672c\u5730\u4ee3\u7801\u4e2d\u89e3\u653e\u51fa\u6765\uff0c\u4f7f\u4e4b\u53ef\u4ee5\u7528 Java \u4ee3\u7801\u7684\u65b9\u5f0f\u89e3\u51b3\u95ee\u9898\u3002
\n\u4f7f\u7528 Instrumentation\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u6784\u5efa\u4e00\u4e2a\u72ec\u7acb\u4e8e\u5e94\u7528\u7a0b\u5e8f\u7684\u4ee3\u7406\u7a0b\u5e8f\uff08Agent\uff09\uff0c\u7528\u6765\u76d1\u6d4b\u548c\u534f\u52a9\u8fd0\u884c\u5728 JVM \u4e0a\u7684\u7a0b\u5e8f\uff0c\u751a\u81f3\u80fd\u591f\u66ff\u6362\u548c\u4fee\u6539\u67d0\u4e9b\u7c7b\u7684\u5b9a\u4e49\u3002
\n\u6709\u4e86\u8fd9\u6837\u7684\u529f\u80fd\uff0c\u5f00\u53d1\u8005\u5c31\u53ef\u4ee5\u5b9e\u73b0\u66f4\u4e3a\u7075\u6d3b\u7684\u8fd0\u884c\u65f6\u865a\u62df\u673a\u76d1\u63a7\u548c Java \u7c7b\u64cd\u4f5c\u4e86\uff0c\u8fd9\u6837\u7684\u7279\u6027\u5b9e\u9645\u4e0a\u63d0\u4f9b\u4e86\u4e00\u79cd\u865a\u62df\u673a\u7ea7\u522b\u652f\u6301\u7684 AOP \u5b9e\u73b0\u65b9\u5f0f\uff0c\u4f7f\u5f97\u5f00\u53d1\u8005\u65e0\u9700\u5bf9 JDK \u505a\u4efb\u4f55\u5347\u7ea7\u548c\u6539\u52a8\uff0c\u5c31\u53ef\u4ee5\u5b9e\u73b0\u67d0\u4e9b AOP \u7684\u529f\u80fd\u4e86\u3002<\/p>\n
\u5bf9\u8c61\u6d4b\u91cf\u5927\u5c0f\u7684\u65b9\u6cd5\u5173\u952e\u4e3ajava\u63d0\u4f9b\u7684\uff081.5\u8fc7\u540e\u624d\u6709\uff09\uff1ajava.lang.instrument.Instrumentation\uff0c\u5b83\u63d0\u4f9b\u4e86\u4e30\u5bcc\u7684\u5bf9\u7ed3\u6784\u7684\u7b49\u5404\u65b9\u9762\u7684\u8ddf\u8e2a\u548c\u5bf9\u8c61\u5927\u5c0f\u7684\u6d4b\u91cf\u7684API\uff08\u672c\u6587\u53ea\u9610\u8ff0\u5bf9\u8c61\u5927\u5c0f\u7684\u6d4b\u91cf\u65b9\u6cd5\uff09\uff0c\u4e8e\u662f\u4e4e\u6211\u5fc3\u559c\u4e86\uff0c
\n\u4e0d\u8fc7\u6bd4\u8f83\u6076\u5fc3\u7684\u662f\u5b83\u662f\u5b9e\u4f8b\u5316\u7c7b\uff1asun.instrument.IntrumentationImpl\u662fsun\u5f00\u5934\u7684\uff0c\u8fd9\u4e2a\u9b3c\u4e1c\u897f\u6709\u70b9\u4e0d\u597d\u641e\uff0c\u7ffb\u5f00\u6e90\u7801\u6784\u9020\u65b9\u6cd5\u662fprivate\u7c7b\u578b\uff0c\u6ca1\u6709\u4efb\u4f55getInstance\u7684\u65b9\u6cd5\uff0c\u5199\u8fd9\u4e2a\u7c7b\u5e72\u561b\uff1f
\n\u770b\u6765\u8fd9\u4e2a\u53ea\u80fd\u88abJVM\u81ea\u5df1\u7ed9\u521d\u59cb\u5316\u4e86\uff0c\u90a3\u4e48\u600e\u4e48\u5c06\u5b83\u81ea\u5df1\u521d\u59cb\u5316\u7684\u4e1c\u897f\u53d6\u51fa\u6765\u7528\u5462\uff0c\u552f\u4e00\u80fd\u60f3\u5230\u7684\u5c31\u662fagent\u4ee3\u7406\uff0c<\/p>\n
java.lang.instrument \u5b66\u4e60\uff08\u4e00\uff09 \u00a0\u00a0\u00a0\u3044\u3044\u3044\u3044\u3044\u3044\u3044\u3044\u3044\u3044\u306d\u306d\u306d\uff01\uff01\uff01\u00a0\u00a0\u00a0\u00a0org.objectweb.asm\u3000\u57fa\u4e8e\u5b57\u8282\u7801\uff21\uff30\uff29\u5229\u7528
\nhttp:\/\/blog.csdn.net\/ykdsg\/article\/details\/12080071
\njava Instrumentation\u6307\u7684\u662f\u53ef\u4ee5\u7528\u72ec\u7acb\u4e8e\u5e94\u7528\u7a0b\u5e8f\u4e4b\u5916\u7684\u4ee3\u7406\uff08agent\uff09\u7a0b\u5e8f\u6765\u76d1\u6d4b\u548c\u534f\u52a9\u8fd0\u884c\u5728JVM\u4e0a\u7684\u5e94\u7528\u7a0b\u5e8f\u3002\u8fd9\u79cd\u76d1\u6d4b\u548c\u534f\u52a9\u5305\u62ec\u4f46\u4e0d\u9650\u4e8e\u83b7\u53d6JVM\u8fd0\u884c\u65f6\u72b6\u6001\uff0c\u66ff\u6362\u548c\u4fee\u6539\u7c7b\u5b9a\u4e49\u7b49\u3002 Java SE5\u4e2d\u4f7f\u7528JVM TI\u66ff\u4ee3\u4e86JVM PI\u548cJVM DI\u3002
\n\u63d0\u4f9b\u4e00\u5957\u4ee3\u7406\u673a\u5236\uff0c\u652f\u6301\u72ec\u7acb\u4e8eJVM\u5e94\u7528\u7a0b\u5e8f\u4e4b\u5916\u7684\u7a0b\u5e8f\u4ee5\u4ee3\u7406\u7684\u65b9\u5f0f\u8fde\u63a5\u548c\u8bbf\u95eeJVM\u3002Instrumentation \u7684\u6700\u5927\u4f5c\u7528\u5c31\u662f\u7c7b\u5b9a\u4e49\u7684\u52a8\u6001\u6539\u53d8\u548c\u64cd\u4f5c\u3002
\n\u5728 Java SE 5 \u53ca\u5176\u540e\u7eed\u7248\u672c\u5f53\u4e2d\uff0c\u5f00\u53d1\u8005\u53ef\u4ee5\u5728\u4e00\u4e2a\u666e\u901a Java \u7a0b\u5e8f\uff08\u5e26\u6709 main \u51fd\u6570\u7684 Java \u7c7b\uff09\u8fd0\u884c\u65f6\uff0c\u901a\u8fc7 \u2013 javaagent \u53c2\u6570\u6307\u5b9a\u4e00\u4e2a\u7279\u5b9a\u7684 jar \u6587\u4ef6\uff08\u5305\u542b Instrumentation \u4ee3\u7406\uff09\u6765\u542f\u52a8 Instrumentation \u7684\u4ee3\u7406\u7a0b\u5e8f\u3002
\njava -javaagent:agent_jar_path[=options] java_app_name
\n\u53ef\u4ee5\u5728\u542f\u52a8\u540d\u4e3ajava_app_name\u7684\u5e94\u7528\u4e4b\u524d\u542f\u52a8\u4e00\u4e2aagent_jar_path\u6307\u5b9a\u4f4d\u7f6e\u7684agent jar\u3002 \u5b9e\u73b0\u8fd9\u6837\u4e00\u4e2aagent jar\u5305\uff0c\u5fc5\u987b\u6ee1\u8db3\u4e24\u4e2a
\n\u6761\u4ef6\uff1a
\n1.\u5728\u8fd9\u4e2ajar\u5305\u7684manifest\u6587\u4ef6\u4e2d\u5305\u542bPremain-Class\u5c5e\u6027\uff0c\u5e76\u4e14\u6539\u5c5e\u6027\u7684\u503c\u4e3a\u4ee3\u7406\u7c7b\u5168\u8def\u5f84\u540d\u3002
\n2.\u4ee3\u7406\u7c7b\u5fc5\u987b\u63d0\u4f9b\u4e00\u4e2apublic static void premain(String args, Instrumentation inst)\u6216 public static void premain(String args) \u65b9\u6cd5\u3002
\n\u5f53\u5728\u547d\u4ee4\u884c\u542f\u52a8\u8be5\u4ee3\u7406jar\u65f6\uff0cVM\u4f1a\u6839\u636emanifest\u4e2d\u6307\u5b9a\u7684\u4ee3\u7406\u7c7b\uff0c\u4f7f\u7528\u4e8emain\u7c7b\u76f8\u540c\u7684\u7cfb\u7edf\u7c7b\u52a0\u8f7d\u5668\uff08\u5373ClassLoader.getSystemClassLoader()\u83b7\u5f97\u7684\u52a0\u8f7d\u5668\uff09\u52a0\u8f7d\u4ee3\u7406\u7c7b\u3002\u5728\u6267\u884cmain\u65b9\u6cd5\u524d\u6267\u884cpremain()\u65b9\u6cd5\u3002\u5982\u679cpremain(String args, Instrumentation inst)\u548cpremain(String args)\u540c\u65f6\u5b58\u5728\u65f6\uff0c\u4f18\u5148\u4f7f\u7528\u524d\u8005\u3002
\n\u5176\u4e2d\u65b9\u6cd5\u53c2\u6570args\u5373\u547d\u4ee4\u4e2d\u7684options\uff0c\u7c7b\u578b\u4e3aString\uff08\u6ce8\u610f\u4e0d\u662fString[]\uff09\uff0c\u56e0\u6b64\u5982\u679c\u9700\u8981\u591a\u4e2a\u53c2\u6570\uff0c\u9700\u8981\u5728\u65b9\u6cd5\u4e2d\u81ea\u5df1\u5904\u7406\uff08\u6bd4\u5982\u7528”;”\u5206\u5272\u591a\u4e2a\u53c2\u6570\u4e4b\u7c7b\uff09\uff1binst\u662f\u8fd0\u884c\u65f6\u7531VM\u81ea\u52a8\u4f20\u5165\u7684Instrumentation\u5b9e\u4f8b\uff0c\u53ef\u4ee5\u7528\u4e8e\u83b7\u53d6VM\u4fe1\u606f\u3002
\njava.lang.instrument\u5b66\u4e60 \uff08\u4e8c\uff09\uff0cjavassist\u5b9e\u4f8b\u7ec3\u4e60
\nhttp:\/\/blog.csdn.net\/ykdsg\/article\/details\/14053409<\/p>\n","protected":false},"excerpt":{"rendered":"
java agent \u7b80\u5355\u4ecb\u7ecd___01___ \u5199\u7b2c\u4e00\u4e2aagent https:\/\/www.2cto.com\/ […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[9],"tags":[],"_links":{"self":[{"href":"https:\/\/vongg.com\/index.php?rest_route=\/wp\/v2\/posts\/998"}],"collection":[{"href":"https:\/\/vongg.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/vongg.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/vongg.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/vongg.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=998"}],"version-history":[{"count":1,"href":"https:\/\/vongg.com\/index.php?rest_route=\/wp\/v2\/posts\/998\/revisions"}],"predecessor-version":[{"id":999,"href":"https:\/\/vongg.com\/index.php?rest_route=\/wp\/v2\/posts\/998\/revisions\/999"}],"wp:attachment":[{"href":"https:\/\/vongg.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=998"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/vongg.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=998"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/vongg.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=998"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}