{"id":927,"date":"2014-05-16T23:17:29","date_gmt":"2014-05-16T15:17:29","guid":{"rendered":"http:\/\/coderbee.net\/?p=927"},"modified":"2014-11-27T22:37:54","modified_gmt":"2014-11-27T14:37:54","slug":"java-se-6-%e6%95%85%e9%9a%9c%e6%8e%92%e9%99%a4%e6%8c%87%e5%8d%97-4%e3%80%81%e7%b3%bb%e7%bb%9f%e5%b4%a9%e6%ba%83%e6%95%85%e9%9a%9c%e6%8e%92%e9%99%a4","status":"publish","type":"post","link":"https:\/\/coderbee.net\/index.php\/jvm\/20140516\/927","title":{"rendered":"Java SE 6 \u6545\u969c\u6392\u9664\u6307\u5357 &#8211; 4\u3001\u7cfb\u7edf\u5d29\u6e83\u6545\u969c\u6392\u9664"},"content":{"rendered":"<p>\u5d29\u6e83\u6216\u81f4\u547d\u9519\u8bef\u5bfc\u81f4\u8fdb\u7a0b\u5f02\u5e38\u7ec8\u6b62\u3002\u6709\u5404\u79cd\u53ef\u80fd\u7684\u7406\u7531\u5bfc\u81f4\u5d29\u6e83\u3002\u4f8b\u5982\uff0c\u5d29\u6e83\u53ef\u80fd\u662f\u7531\u4e8eHotSpot VM\u3001\u7cfb\u7edf\u5e93\u3001Java SE \u5e93\u6216API\u3001\u7a0b\u5e8f\u672c\u5730\u4ee3\u7801\u3001\u751a\u81f3\u64cd\u4f5c\u7cfb\u7edf\u91cc\u7684 bug\u3002\u6781\u7aef\u56e0\u7d20\u5982\u64cd\u4f5c\u7cfb\u7edf\u8d44\u6e90\u8017\u5c3d\u4e5f\u53ef\u4ee5\u5bfc\u81f4\u5d29\u6e83\u3002<\/p>\n<p>\u56e0 HotSpot VM \u6216 Java SE\u5e93\u4ee3\u7801\u5bfc\u81f4\u7684\u5d29\u6e83\u662f\u7f55\u89c1\u7684\u3002\u672c\u7ae0\u63d0\u4f9b\u5982\u4f55\u68c0\u67e5\u5d29\u6e83\u7684\u5efa\u8bae\u3002\u6709\u65f6\u5019\u53ef\u4ee5\u53d8\u901a\u5d29\u6e83\u76f4\u5230\u5bfc\u81f4\u5d29\u6e83\u7684\u6e90\u88ab\u8bca\u65ad\u548c\u4fee\u590d\uff08\u4e5f\u5c31\u662f\u53ef\u4ee5\u907f\u5f00\u5d29\u6e83\uff09\u3002<\/p>\n<p>\u901a\u5e38\uff0c\u5d29\u6e83\u7684\u7b2c\u4e00\u6b65\u662f\u5b9a\u4f4d\u81f4\u547d\u9519\u8bef\u65e5\u5fd7\u3002\u8fd9\u662fHotSpot VM\u751f\u6210\u7684\u6587\u672c\u6587\u4ef6\u3002\u9644\u5f55C-\u81f4\u547d\u9519\u8bef\u65e5\u5fd7 \u89e3\u91ca\u4e86\u5982\u4f55\u5b9a\u4f4d\u6587\u4ef6\u548c\u6587\u4ef6\u7684\u8be6\u7ec6\u63cf\u8ff0\u3002<\/p>\n<h2>4.1  \u5d29\u6e83\u6837\u672c<\/h2>\n<p>\u672c\u8282\u5c55\u793a\u4e00\u4e9b\u6837\u672c\u6765\u8bf4\u660e\u9519\u8bef\u65e5\u5fd7\u662f\u5982\u4f55\u7528\u4e8e\u542f\u53d1\u5d29\u6e83\u539f\u56e0\u7684\u3002<\/p>\n<h3>4.1  \u6d4b\u5b9a\u54ea\u91cc\u53d1\u751f\u5d29\u6e83<\/h3>\n<p>\u9519\u8bef\u65e5\u5fd7\u5934\u663e\u793a\u4e86\u6709\u95ee\u9898\u7684\u5e27\u3002\u89c1 C.3 \u683c\u5f0f\u5934\u3002<\/p>\n<p>\u5982\u679c\u9876\u5c42\u5e27\u662f\u672c\u5730\u5e27\u4e14\u4e0d\u662f\u64cd\u4f5c\u7cfb\u7edf\u672c\u5730\u5e27\uff0c\u8fd9\u8868\u660e\u95ee\u9898\u53ef\u80fd\u53d1\u751f\u5728\u672c\u5730\u5e93\uff0c\u800c\u4e0d\u662f\u5728JVM\u91cc\u3002\u89e3\u51b3\u5d29\u6e83\u7684\u7b2c\u4e00\u6b65\u662f\u7814\u7a76\u672c\u5730\u5e93\u53d1\u751f\u5d29\u6e83\u7684\u6e90\u3002\u6709\u4e09\u4e2a\u9009\u62e9\uff0c\u53d6\u51b3\u4e8e\u672c\u5730\u5e93\u7684\u6e90\u3002<\/p>\n<p>\u5982\u679c\u672c\u5730\u5e93\u662f\u7531\u4f60\u7684\u7a0b\u5e8f\u63d0\u4f9b\uff0c\u7814\u7a76\u4f60\u7684\u672c\u5730\u5e93\u7684\u6e90\u4ee3\u7801\u3002\u9009\u9879 <code>-Xcheck:jni<\/code> \u53ef\u4ee5\u5e2e\u52a9\u67e5\u627e\u672c\u5730 bug\u3002\u89c1 B.2.1 <code>-Xcheck:jni<\/code> \u9009\u9879\u3002<\/p>\n<p>\u5982\u679c\u4f60\u7684\u7a0b\u5e8f\u4f7f\u7528\u7684\u672c\u5730\u5e93\u662f\u7531\u5176\u4ed6\u4f9b\u5e94\u5546\u63d0\u4f9b\uff0c\u62a5\u544abug\uff0c\u63d0\u4f9b\u81f4\u547d\u9519\u8bef\u65e5\u5fd7\u4fe1\u606f\u3002<\/p>\n<p><!--more--><\/p>\n<h3>4.1.2 \u5728\u672c\u5730\u4ee3\u7801\u91cc\u5d29\u6e83<\/h3>\n<p>\u5982\u679c\u81f4\u547d\u9519\u8bef\u65e5\u5fd7\u8868\u660e\u5d29\u6e83\u662f\u5728\u672c\u5730\u5e93\uff0c\u90a3\u4e48\u53ef\u80fd\u6709bug\u5728\u672c\u5730\u4ee3\u7801\u6216JNI\u5e93\u4ee3\u7801\u3002\u5d29\u6e83\u5f53\u7136\u4e5f\u53ef\u4ee5\u88ab\u5176\u4ed6\u56e0\u7d20\u5bfc\u81f4\uff0c\u4f46\u5206\u6790\u5e93\u548c\u4efb\u4f55core\u6587\u4ef6\u6216\u5d29\u6e83\u8f6c\u50a8\u662f\u4e2a\u597d\u7684\u5f00\u59cb\u70b9\u3002\u4f8b\u5982\uff0c\u8003\u8651\u4e0b\u561b\u7684\u81f4\u547d\u9519\u8bef\u65e5\u5fd7\u5934\uff1a<\/p>\n<pre><code># An unexpected error has been detected by HotSpot Virtual Machine:\n#\n#  SIGSEGV (0xb) at pc=0x417789d7, pid=21139, tid=1024\n#\n# Java VM: Java HotSpot(TM) Server VM (6-beta2-b63 mixed mode)\n# Problematic frame:\n# C  [libApplication.so+0x9d7]\n\n<\/code><\/pre>\n<p>\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\u7ebf\u7a0b\u5728 <code>libApplication.so<\/code> \u91cc\u6267\u884c\u65f6\u53d1\u751f <code>SIGSEGV<\/code> \u3002<\/p>\n<p>\u6709\u65f6\u5019\u672c\u5730\u5e93\u91cc\u7684bug\u663e\u793a\u5b83\u81ea\u5df1\u662f\u5728JVM\u4ee3\u7801\u91cc\u5d29\u6e83\u3002\u8003\u8651\u4e0b\u9762\u7684\u5d29\u6e83\uff0c\u7ebf\u7a0b <code>JavaThread<\/code> \u5728 <code>_thread_in_vm<\/code> \u72b6\u6001\uff08\u610f\u5473\u7740\u5b83\u6b63\u5728\u6267\u884c JVM \u4ee3\u7801\uff09\u5931\u8d25\uff1a<\/p>\n<pre><code># An unexpected error has been detected by HotSpot Virtual Machine:\n#\n#  EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x08083d77, pid=3700, tid=2896\n#\n# Java VM: Java HotSpot(TM) Client VM (1.5-internal mixed mode)\n# Problematic frame:\n# V  [jvm.dll+0x83d77]\n\n---------------  T H R E A D  ---------------\n\nCurrent thread (0x00036960):  JavaThread \"main\" [_thread_in_vm, id=2896]\n :\nStack: [0x00040000,0x00080000),  sp=0x0007f9f8,  free space=254k\nNative frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)\nV  [jvm.dll+0x83d77]\nC  [App.dll+0x1047]          &lt;========= C\/native frame\nj  Test.foo()V+0\nj  Test.main([Ljava\/lang\/String;)V+0\nv  ~StubRoutines::call_stub\nV  [jvm.dll+0x80f13]\nV  [jvm.dll+0xd3842]\nV  [jvm.dll+0x80de4]\nV  [jvm.dll+0x87cd2]\nC  [java.exe+0x14c0]\nC  [java.exe+0x64cd]\nC  [kernel32.dll+0x214c7]\n :\n\n<\/code><\/pre>\n<p>\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6808\u8f68\u8ff9\u663e\u793a\u4e86 <code>App.dll<\/code> \u91cc\u7684\u672c\u5730\u4f8b\u7a0b\u8c03\u7528\u5230\u4e86VM\u91cc\uff08\u53ef\u80fd\u7528JNI\uff09\u3002<\/p>\n<p>\u5982\u679c\u4f60\u5728\u672c\u5730\u7a0b\u5e8f\u5e93\u9047\u5230\u5d29\u6e83\uff0c\u5982\u679c\u53ef\u4ee5\uff0c\u4f60\u53ef\u80fd\u80fd\u591f\u5173\u8054\u672c\u5730\u8c03\u8bd5\u5668\u5230core\u6587\u4ef6\u6216\u5d29\u6e83\u8f6c\u50a8\u3002\u53d6\u51b3\u4e8e\u64cd\u4f5c\u7cfb\u7edf\uff0c\u672c\u5730\u8c03\u8bd5\u5668\u662f dbx, gdb \u6216 windbg\u3002<\/p>\n<p>\u53e6\u4e00\u4e2a\u65b9\u6cd5\u662f\u8fd0\u884c\u5e26 <code>-Xcheck:jni<\/code> \u9009\u9879\u8fd0\u884c\uff0c\u8fd9\u4e2a\u9009\u9879\u4e0d\u4fdd\u8bc1\u627e\u51faJNI\u4ee3\u7801\u91cc\u7684\u6240\u6709\u95ee\u9898\uff0c\u4f46\u5b83\u53ef\u4ee5\u5e2e\u52a9\u8bc6\u522b\u95ee\u9898issue\u7684\u663e\u8457\u6570\u5b57\u3002<\/p>\n<p>\u5982\u679c\u53d1\u751f\u5d29\u6e83\u7684\u672c\u5730\u5e93\u662fJRE\u7684\u4e00\u90e8\u5206\uff0c\u90a3\u4e48\u53ef\u80fd\u662f\u4f60\u9047\u5230\u4e86\u4e00\u4e2a\u5e93\u6216API bug\u3002<\/p>\n<h3>4.1.3  \u7531\u4e8e\u6808\u6ea2\u51fa\u5d29\u6e83<\/h3>\n<p>Java\u8bed\u8a00\u4ee3\u7801\u91cc\u7684\u6808\u6ea2\u51fa\u901a\u5e38\u5c06\u5bfc\u81f4\u7ebf\u7a0b\u629b\u51fa <code>java.lang.StackOverflowError<\/code>\u3002\u53e6\u4e00\u65b9\u9762\uff0c C and C++ write past the end of the stack and provoke a stack overflow\u3002\u8fd9\u4e2a\u81f4\u547d\u9519\u8bef\u5c06\u5bfc\u81f4\u8fdb\u7a0b\u7ec8\u6b62\u3002<\/p>\n<p>\u5728HotSpot\u5b9e\u73b0\u91cc\uff0cJava\u65b9\u6cd5\u4e0eC\/C++\u672c\u5730\u4ee3\u7801\u5171\u4eab\u6808\u5e27\uff0c\u4e5f\u5c31\u662f\u7528\u6237\u672c\u5730\u4ee3\u7801\u548cVM\u81ea\u8eab\u3002Java\u65b9\u6cd5\u751f\u6210\u4ee3\u7801\u6765\u68c0\u67e5\uff0c\u8ddd\u6808\u7ed3\u675f\u6709\u4e2a\u56fa\u5b9a\u8ddd\u79bb\u7684\u53ef\u5f97\u6808\u7a7a\u95f4\uff0c\u8fd9\u6837\u53ef\u4ee5\u8c03\u7528\u672c\u5730\u4ee3\u7801\u800c\u4e0d\u4f1a\u8d85\u51fa\u6808\u7a7a\u95f4\u3002\u8fd9\u4e2a\u671d\u5411\u6808\u7ed3\u675f\u7684\u8ddd\u79bb\u53eb\u4f5c \u201c\u9634\u5f71\u9875\uff0cShadow Pages\u201d\u3002\u9634\u5f71\u9875\u7684\u5927\u5c0f\u5728 <code>3-20<\/code> \u4e2a\uff08\u5185\u5b58\uff09\u9875\u4e4b\u95f4\uff0c\u53d6\u51b3\u4e8e\u5e73\u53f0\u3002\u8fd9\u4e2a\u8ddd\u79bb\u662f\u53ef\u8c03\u7684\uff0c\u8fd9\u6837\u7a0b\u5e8f\u7684\u672c\u5730\u4ee3\u7801\u9700\u8981\u591a\u4e8e\u9ed8\u8ba4\u8ddd\u79bb\u7684\u672c\u5730\u4ee3\u7801\u53ef\u4ee5\u589e\u52a0\u9634\u5f71\u9875\u7684\u5927\u5c0f\u3002\u589e\u52a0\u9634\u5f71\u9875\u7684\u9009\u9879\u662f <code>-XX:StackShadowPages= n<\/code>\uff0c<code>n<\/code> \u5927\u4e8e\u5e73\u53f0\u7684\u9ed8\u8ba4\u6808\u9634\u5f71\u9875\u3002<\/p>\n<p>\u5982\u679c\u7a0b\u5e8f\u78b0\u5230\u6bb5\u9519\u8bef\u4e14\u6ca1\u6709core\u6587\u4ef6\u3001\u6216\u81f4\u547d\u9519\u8bef\u65e5\u5fd7\u6587\u4ef6\u3001\u6216 \u5728Windows \u4e0a\u7684 <code>STACK_OVERFLOW_ERROR<\/code> \u3001\u6216 \u6d88\u606f \u201c An irrecoverable stack overflow has occurred \u201d\uff0c\u8fd9\u8868\u660e <code>StackShadowPages<\/code> \u7684\u503c\u88ab\u8d85\u8fc7\u4e86\uff0c\u9700\u8981\u66f4\u591a\u7a7a\u95f4\u3002<\/p>\n<p>\u5982\u679c\u4f60\u589e\u52a0 <code>StackShadowPages<\/code> \u7684\u503c\uff0c\u4f60\u53ef\u80fd\u4e5f\u9700\u8981\u589e\u52a0\u7ebf\u7a0b\u9ed8\u8ba4\u6808\u5927\u5c0f\uff0c\u7528 <code>-Xss<\/code> \u53c2\u6570\u3002\u589e\u52a0\u7ebf\u7a0b\u9ed8\u8ba4\u6808\u5927\u5c0f\u53ef\u80fd\u9700\u8981\u51cf\u5c11\u88ab\u521b\u5efa\u7684\u7ebf\u7a0b\uff0c\u6240\u4ee5\u5c0f\u5fc3\u9009\u62e9\u7ebf\u7a0b\u6808\u7684\u5927\u5c0f\u3002\u4e0d\u540c\u5e73\u53f0\u7684\u6808\u5927\u5c0f\u4ece <code>256k - 1024k<\/code> \u4e0d\u7b49\u3002<\/p>\n<p>\u4e0b\u9762\u662f\u6765\u81ea\u81f4\u547d\u9519\u8bef\u65e5\u5fd7\u7684\u4e00\u4e2a\u6bb5\u9519\u8bef\uff0c\u5728Windows\u7cfb\u7edf\u4e0a\uff0c\u7ebf\u7a0b\u5728\u672c\u5730\u4ee3\u7801\u91cc\u6fc0\u8d77\u4e00\u4e2a\u6808\u6ea2\u51fa\uff1a<\/p>\n<pre><code># An unexpected error has been detected by HotSpot Virtual Machine:\n#\n#  EXCEPTION_STACK_OVERFLOW (0xc00000fd) at pc=0x10001011, pid=296, tid=2940\n#\n# Java VM: Java HotSpot(TM) Client VM (1.6-internal mixed mode, sharing)\n# Problematic frame:\n# C  [App.dll+0x1011]\n#\n\n---------------  T H R E A D  ---------------\n\nCurrent thread (0x000367c0):  JavaThread \"main\" [_thread_in_native, id=2940]\n:\nStack: [0x00040000,0x00080000),  sp=0x00041000,  free space=4k\nNative frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)\nC  [App.dll+0x1011]\nC  [App.dll+0x1020]\nC  [App.dll+0x1020]\n:\nC  [App.dll+0x1020]\nC  [App.dll+0x1020]\n...&lt;more frames&gt;...\n\nJava frames: (J=compiled Java code, j=interpreted, Vv=VM code)\nj  Test.foo()V+0\nj  Test.main([Ljava\/lang\/String;)V+0\nv  ~StubRoutines::call_stub\n\n<\/code><\/pre>\n<p>\u6ce8\u610f\u4e0a\u9762\u8f93\u51fa\u7684\u4e0b\u9762\u4fe1\u606f\uff1a<\/p>\n<ul>\n<li>\u5f02\u5e38\u662f <code>EXCEPTION_STACK_OVERFLOW<\/code>\u3002<\/li>\n<li>\u7ebf\u7a0b\u7684\u72b6\u6001\u662f <code>_thread_in_native<\/code>\uff0c\u8fd9\u610f\u5473\u7740\u7ebf\u7a0b\u5728\u6267\u884c\u672c\u5730\u6216JNI\u4ee3\u7801\u3002<\/li>\n<li>\u6808\u4fe1\u606f\u91cc\u7684\u7a7a\u95f2\u7a7a\u95f4\u53ea\u6709 4k\uff08Windows \u7cfb\u7edf\u4e0a\u5355\u4e2a\u9875\u9762\uff09\u3002\u53e6\u5916\u6808\u6307\u9488sp\u662f  0x00041000 \uff0c\u975e\u5e38\u63a5\u8fd1\u4e8e\u6808\u7ed3\u675f  0x00040000\u3002<\/li>\n<li>\u672c\u5730\u5e27\u8f93\u51fa\u663e\u793a\uff0c\u8fd9\u79cd\u60c5\u51b5\u4e0b\u95ee\u9898\u662f\u672c\u5730\u9012\u5f52\u51fd\u6570\u3002<\/li>\n<li>\u8f93\u51fa\u6807\u8bb0 <code>...&lt;more frames&gt;..<\/code> \u8868\u660e\u4e86\u5b58\u5728\u989d\u5916\u7684\u5e27\uff0c\u4f46\u6ca1\u6709\u8f93\u51fa\u3002\u8f93\u51fa\u9650\u5236\u5728 100 \u5e27\u3002<\/li>\n<\/ul>\n<h3>4.1.4  HotSpot \u7f16\u8bd1\u7ebf\u7a0b\u91cc\u5d29\u6e83<\/h3>\n<p>\u5982\u679c\u81f4\u547d\u9519\u8bef\u65e5\u5fd7\u8f93\u51fa\u663e\u793a <code>Current thread<\/code> \u662f\u547d\u540d\u4e3a <code>CompilerThread0, CompilerThread1<\/code> \u6216 <code>AdapterCompiler<\/code> \u7684 <code>JavaThread<\/code>\uff0c\u8fd9\u5f88\u53ef\u80fd\u662f\u4f60\u78b0\u5230\u4e00\u4e2a\u7f16\u8bd1\u5668bug\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u4f60\u53ef\u80fd\u9700\u8981\u4e34\u65f6\u7ed5\u8fc7\u95ee\u9898\uff0c\u901a\u8fc7\u5207\u6362\u7f16\u8bd1\u5668\u6216\u6392\u9664\u7f16\u8bd1\u6fc0\u8d77\u5d29\u6e83\u7684\u65b9\u6cd5\u3002<\/p>\n<h3>4.1.5  \u5728\u5df2\u7f16\u8bd1\u4ee3\u7801\u91cc\u5d29\u6e83<\/h3>\n<p>\u5982\u679c\u5d29\u6e83\u53d1\u751f\u5728\u5df2\u7f16\u8bd1\u4ee3\u7801\u91cc\uff0c\u53ef\u80fd\u662f\u4f60\u9047\u5230\u4e00\u4e2a\u7f16\u8bd1\u5668bug\uff0c\u5bfc\u81f4\u751f\u6210\u4e0d\u6b63\u786e\u7684\u4ee3\u7801\u3002\u4f60\u53ef\u4ee5\u8bc6\u522b\u5df2\u7f16\u8bd1\u4ee3\u7801\u91cc\u7684\u5d29\u6e83\uff0c\u5982\u679c\u6709\u95ee\u9898\u7684\u5e27\u6807\u8bb0\u4e86\u7f16\u7801 <code>J<\/code>\uff08\u610f\u5473\u7740\u4e00\u4e2a\u5df2\u7f16\u8bd1Java\u5e27\uff09\u3002\u4e0b\u9762\u662f\u8fd9\u7c7b\u5d29\u6e83\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code># An unexpected error has been detected by HotSpot Virtual Machine:\n#\n#  SIGSEGV (0xb) at pc=0x0000002a99eb0c10, pid=6106, tid=278546\n#\n# Java VM: Java HotSpot(TM) 64-Bit Server VM (1.6.0-beta-b51 mixed mode)\n# Problematic frame:\n# J  org.foobar.Scanner.body()V\n#\n:\nStack: [0x0000002aea560000,0x0000002aea660000),  sp=0x0000002aea65ddf0,\n  free space=1015k\nNative frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)\nJ  org.foobar.Scanner.body()V\n\n[error occurred during error reporting, step 120, id 0xb]\n\n<\/code><\/pre>\n<p>\u6ce8\u610f\u5b8c\u6574\u7684\u7ebf\u7a0b\u6808\u4e0d\u53ef\u5f97\u3002\u8f93\u51fa\u884c <code>error occurred during error reporting<\/code> \u610f\u5473\u7740\u5728\u83b7\u53d6\u6808\u8f68\u8ff9\u65f6\u51fa\u73b0\u9519\u8bef\uff08\u8fd9\u4e2a\u4f8b\u5b50\u91cc\u53ef\u80fd\u662f\u6808\u8150\u5316corruption\uff09\u3002<\/p>\n<p>\u53ef\u80fd\u9700\u8981\u4e34\u65f6\u7ed5\u8fc7\u95ee\u9898\uff0c\u901a\u8fc7\u5207\u6362\u7f16\u8bd1\u5668\uff08\u5982\u7528HotSpot Client VM\u66ff\u4ee3HotSpot Server VM\uff0c\u6216\u76f8\u53cd\uff09\u6216\u6392\u9664\u7f16\u8bd1\u6fc0\u8d77\u5d29\u6e83\u7684\u65b9\u6cd5\u3002\u5728\u8fd9\u4e2a\u7279\u5b9a\u4f8b\u5b50\u91cc\uff0c\u53ef\u80fd\u4e0d\u80fd\u5207\u6362\u7f16\u8bd1\u5668\u4ece64-bit Server VM \u5207\u6362\u5230 32-bit Client VM\u3002\uff08Client VM \u6ca1\u670964\u4f4d\uff1f\uff09<\/p>\n<h3>4.1.6   VMThread \u91cc\u5d29\u6e83<\/h3>\n<p>\u5982\u679c\u81f4\u547d\u65e5\u5fd7\u8f93\u51fa\u663e\u793a <code>Current thread<\/code> \u662f <code>VMThread<\/code>\uff0c\u67e5\u627e <code>THREAD<\/code> \u8282\u91cc\u5305\u542b <code>VM_Operation<\/code> \u7684\u884c\u3002VMThread \u662fHotSpot VM\u91cc\u7684\u7279\u6b8a\u7ebf\u7a0b\u3002\u5b83\u5728VM\u91cc\u6267\u884c\u7279\u6b8a\u4efb\u52a1\uff0c\u5982\u5783\u573e\u56de\u6536\uff08GC\uff09\u3002<code>VM_Operation<\/code> \u6697\u793a\u662f\u5783\u573e\u56de\u6536\u64cd\u4f5c\uff0c\u90a3\u4e48\u4f60\u53ef\u80fd\u9047\u5230\u4e86\u5806\u8150\u5316\u7684\u95ee\u9898\u3002<\/p>\n<p>\u5d29\u6e83\u4e5f\u53ef\u80fd\u662f\u4e2aGC\u95ee\u9898\uff0c\u4f46\u5b83\u540c\u6837\u4e5f\u53ef\u4ee5\u662f\u5176\u4ed6\uff0c\u4f7f\u5806\u91cc\u7684\u5bf9\u8c61\u5f15\u7528\u5904\u4e8e\u4e0d\u4e00\u81f4\u6216\u4e0d\u6b63\u786e\u72b6\u6001\u3002\u5728\u8fd9\u79cd\u60c5\u51b5\u4e0b\uff0c\u6536\u96c6\u5c3d\u53ef\u80fd\u591a\u7684\u73af\u5883\u4fe1\u606f\uff0c\u5c1d\u8bd5\u53ef\u80fd\u7684\u53d8\u901a\u65b9\u6848\u3002\u5982\u679c\u95ee\u9898\u662fGC\u6709\u5173\u7684\uff0c\u4f60\u53ef\u80fd\u53ef\u4ee5\u4e34\u65f6\u7ed5\u8fc7\u95ee\u9898\uff0c\u901a\u8fc7\u6539\u53d8GC\u914d\u7f6e\u3002<\/p>\n<h2>4.2  \u627e\u51fa\u53d8\u901a\u65b9\u6848<\/h2>\n<p>\u5982\u679c\u5173\u952e\u7a0b\u5e8f\u53d1\u751f\u5d29\u6e83\uff0c\u4e14\u5d29\u6e83\u8868\u73b0\u51fa\u662f\u7531\u4e8eHotSpot VM\u91cc\u7684bug\u5bfc\u81f4\uff0c\u90a3\u4e48\u5b83\u503c\u5f97\u5feb\u901f\u627e\u51fa\u4e00\u4e2a\u4e34\u65f6\u53d8\u901a\u65b9\u6848\u3002\u672c\u8282\u7684\u76ee\u6807\u662f\u542f\u53d1\u53ef\u80fd\u7684\u53d8\u901a\u65b9\u6848\u3002<\/p>\n<p><strong>\u6ce8\u610f<\/strong>\uff1a\u5373\u4f7f\u672c\u8282\u7684\u53d8\u901a\u65b9\u6848\u6210\u529f\u6d88\u9664\u4e86\u5d29\u6e83\uff0c\u53d8\u901a\u65b9\u6848\u4e5f\u4e0d\u662f\u95ee\u9898\u7684\u4fee\u590d\uff0c\u4ec5\u4ec5\u662f\u4e34\u65f6\u89e3\u51b3\u65b9\u6848\u3002 Submit a support call or bug report with the original configuration that emonstrated the issue.<\/p>\n<h3>4.2.1  HotSpot \u7f16\u8bd1\u5668\u7ebf\u7a0b\u6216\u5df2\u7f16\u8bd1\u4ee3\u7801\u91cc\u5d29\u6e83<\/h3>\n<p>\u5982\u679c\u81f4\u547d\u9519\u8bef\u65e5\u5fd7\u8868\u660e\u5d29\u6e83\u53d1\u751f\u5728\u7f16\u8bd1\u5668\u7ebf\u7a0b\uff0c\u53ef\u80fd\u662f\u4f60\u9047\u5230\u4e86\u4e00\u4e2a\u7f16\u8bd1\u5668bug\u3002\u7c7b\u4f3c\u5730\uff0c\u5982\u679c\u5d29\u6e83\u53d1\u751f\u5728\u5df2\u7f16\u8bd1\u4ee3\u7801\u91cc\uff0c\u53ef\u80fd\u662f\u7f16\u8bd1\u5668\u751f\u6210\u4e86\u4e0d\u6b63\u786e\u4ee3\u7801\u3002<\/p>\n<p>\u5bf9\u4e8e HotSpot Client VM\uff0c\u7f16\u8bd1\u5668\u7ebf\u7a0b\u4ee5 <code>CompilerThread0<\/code> \u51fa\u73b0\u5728\u9519\u8bef\u65e5\u5fd7\u91cc\u3002 HotSpot Server VM \u6709\u591a\u4e2a\u7f16\u8bd1\u5668\u7ebf\u7a0b\uff0c\u5728\u9519\u8bef\u65e5\u5fd7\u6587\u4ef6\u91cc\u8868\u73b0\u4e3a <code>CompilerThread0, CompilerThread1, AdapterThread<\/code>\u3002<\/p>\n<p>\u4e0b\u9762\u662f\u9047\u5230\u7f16\u8bd1\u5668bug\u7684\u9519\u8bef\u65e5\u5fd7\u7247\u6bb5\uff0cbug\u5728Java SE 5.0\u5f00\u53d1\u4e2d\u4fee\u590d\u3002\u65e5\u5fd7\u6587\u4ef6\u663e\u793a\u4f7f\u7528\u4e86 HotSpot Server VM\uff0c\u5d29\u6e83\u5728 <code>CompilerThread1<\/code> \u91cc\u53d1\u751f\u3002\u53e6\u5916\uff0c\u65e5\u5fd7\u6587\u4ef6\u663e\u793a\u4e86 <code>Current CompileTask<\/code> \u662f\u5728\u7f16\u8bd1 <code>java.lang.Thread.setPriority<\/code> \u65b9\u6cd5\u3002<\/p>\n<pre><code># An unexpected error has been detected by HotSpot Virtual Machine:\n#\n:\n# Java VM: Java HotSpot(TM) Server VM (1.5-internal-debug mixed mode)\n:\n---------------  T H R E A D  ---------------\n\nCurrent thread (0x001e9350): JavaThread \"CompilerThread1\" daemon [_thread_in_vm, id=20]\n\nStack: [0xb2500000,0xb2580000),  sp=0xb257e500,  free space=505k\nNative frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)\nV  [libjvm.so+0xc3b13c]\n:\n\nCurrent CompileTask:\nopto: 11      java.lang.Thread.setPriority(I)V (53 bytes)\n\n---------------  P R O C E S S  ---------------\n\nJava Threads: ( =&gt; current thread )\n  0x00229930 JavaThread \"Low Memory Detector\" daemon [_thread_blocked, id=21]\n=&gt;0x001e9350 JavaThread \"CompilerThread1\" daemon [_thread_in_vm, id=20]\n :\n\n<\/code><\/pre>\n<p>\u8fd9\u79cd\u60c5\u51b5\u6709\u4e24\u4e2a\u6f5c\u5728\u7684\u53d8\u901a\u65b9\u6848\uff1a<\/p>\n<ul>\n<li>\u66b4\u529b\u65b9\u6cd5\uff1a\u4fee\u6539\u914d\u7f6e\uff0c\u8fd9\u6837\u7a0b\u5e8f\u4ee5 <code>-client<\/code> \u9009\u9879\u6765\u6307\u5b9a HotSpot Client VM \u6765\u8fd0\u884c\u3002<\/li>\n<li>\u5047\u8bbebug\u53ea\u53d1\u751f\u5728\u7f16\u8bd1 <code>setPriority<\/code> \u65b9\u6cd5\uff0c\u90a3\u4e48\u4ece\u6392\u9664\u7f16\u8bd1\u6b64\u65b9\u6cd5\u3002<\/li>\n<\/ul>\n<p>\u7b2c\u4e00\u79cd\u65b9\u6cd5\uff08\u4f7f\u7528 <code>-client<\/code> \u9009\u9879\uff09\u5bf9\u6709\u4e9b\u73af\u5883\u53ef\u80fd\u662f\u5fae\u4e0d\u8db3\u9053\u7684\u3002\u5bf9\u4e8e\u5176\u5b83\uff0c\u53ef\u80fd\u662f\u56f0\u96be\u7684\uff0c\u5982\u679c\u914d\u7f6e\u662f\u590d\u6742\u7684\u6216\u914d\u7f6eVM\u7684\u547d\u4ee4\u884c\u4e0d\u53ef\u8bbf\u95ee\u3002\u901a\u5e38\uff0c\u4ece HotSpot Server VM \u5207\u6362\u5230  HotSpot Client VM \u4f1a\u964d\u4f4e\u7a0b\u5e8f\u7684\u5cf0\u503c\u6027\u80fd\u3002\u53d6\u51b3\u4e8e\u73af\u5883\uff0c\u8fd9\u53ef\u80fd\u662f\u53ef\u63a5\u53d7\u7684\uff0c\u76f4\u5230\u95ee\u9898\u88ab\u8bca\u65ad\u548c\u4fee\u590d\u3002<\/p>\n<p>\u7b2c\u4e8c\u79cd\u65b9\u6cd5\u8981\u6c42\u5728\u7a0b\u5e8f\u7684\u5de5\u4f5c\u76ee\u5f55\u4e0b\u521b\u5efa\u6587\u4ef6 <code>.hotspot_compiler<\/code>\uff0c\u6587\u4ef6\u793a\u4f8b\uff1a<\/p>\n<pre><code>exclude    java\/lang\/Thread    setPriority\n\n<\/code><\/pre>\n<p>\u901a\u5e38\u8fd9\u4e2a\u6587\u4ef6\u7684\u683c\u5f0f\u662f <code>exclude CLASS METHOD<\/code>\uff0cCLASS \u662f\u5168\u8def\u5f84\u7c7b\u540d\uff0cMETHOD\u662f\u65b9\u6cd5\u7684\u540d\u5b57\uff0c\u6784\u9020\u5668\u65b9\u6cd5\u6307\u5b9a\u4e3a <code>&lt;init&gt;<\/code>\uff0c\u9759\u6001\u521d\u59cb\u5316\u5668\u6307\u5b9a\u4e3a <code>&lt;clinit&gt;<\/code>\u3002<\/p>\n<blockquote>\n<p><strong>\u6ce8\u610f<\/strong>\uff1a<code>.hotspot_compiler<\/code> \u6587\u4ef6\u4e0d\u662f\u53d7\u652f\u6301\u7684\u3002<\/p>\n<\/blockquote>\n<p>\u4e00\u65e6\u7a0b\u5e8f\u91cd\u65b0\u542f\u52a8\uff0c\u7f16\u8bd1\u5668\u5c06\u4e0d\u518d\u5c1d\u8bd5\u7f16\u8bd1 <code>.hotspot_compiler<\/code> \u6587\u4ef6\u91cc\u5217\u51fa\u7684\u4efb\u4f55\u65b9\u6cd5\u3002<\/p>\n<p>\u4e3a\u4e86\u6838\u5b9eHotSpot VM\u6b63\u786e\u5b9a\u4f4d\u548c\u5904\u7406\u4e86 <code>.hotspot_compiler<\/code> \u6587\u4ef6\uff0c\u5728\u8fd0\u884c\u65f6\u67e5\u627e\u4e0b\u9762\u7684\u65e5\u5fd7\u4fe1\u606f\u3002\u6ce8\u610f\u6587\u4ef6\u540d\u662f\u7528\u53e5\u70b9\u5206\u9694\uff0c\u800c\u4e0d\u662f\u659c\u7ebf\u3002<\/p>\n<pre><code>### Excluding compile:    java.lang.Thread::setPriority\n\n<\/code><\/pre>\n<h3>4.2.2  \u5783\u573e\u56de\u6536\u65f6\u5d29\u6e83<\/h3>\n<p>\u5982\u679c\u5d29\u6e83\u5728\u5783\u573e\u56de\u6536\u65f6\u53d1\u751f\uff0c\u90a3\u4e48\u81f4\u547d\u9519\u8bef\u65e5\u5fd7\u62a5\u544a\u6b63\u5728\u8fdb\u884c\u4e00\u4e2a <code>VM_Operation<\/code>\u3002\u4e3a\u4e86\u8ba8\u8bba\u7684\u76ee\u7684\uff0c\u5047\u8bbe\u6700\u4e3b\u8981\u7684\u5e76\u53d1GC\uff08<code>-XX:+UseConcMarkSweep<\/code>\uff09\u672a\u4f7f\u7528\u3002 <code>VM_Operation<\/code> \u663e\u793a\u5728\u65e5\u5fd7\u7684 <code>THREAD<\/code> \u533a\u57df\uff0c\u8868\u660e\u4e0b\u9762\u7684\u60c5\u5883\u4e4b\u4e00\uff1a<\/p>\n<ul>\n<li>Generation collection for allocation<\/li>\n<li>Full generation collection<\/li>\n<li>Parallel gc failed allocation<\/li>\n<li>Parallel gc failed permanent allocation<\/li>\n<li>Parallel gc system gc<\/li>\n<\/ul>\n<p>\u65e5\u5fd7\u91cc\u62a5\u544a\u7684\u5f53\u524d\u7ebf\u7a0b\u6700\u53ef\u80fd\u662f <code>VMThread<\/code>\u3002\u8fd9\u662f\u7279\u6b8a\u7ebf\u7a0b\u7528\u4e8e\u6267\u884c HotSpot VM \u91cc\u7684\u7279\u5b9a\u4efb\u52a1\u3002\u4e0b\u9762\u7684\u81f4\u547d\u9519\u8bef\u65e5\u5fd7\u7247\u6bb5\u663e\u793a\u4e86\u4e32\u884c\u5783\u573e\u6536\u96c6\u5668\u5d29\u6e83\u7684\u4e00\u4e2a\u4e3e\u4f8b\uff1a<\/p>\n<pre><code>---------------  T H R E A D  ---------------\n\nCurrent thread (0x002cb720):  VMThread [id=3252]\n\nsiginfo: ExceptionCode=0xc0000005, reading address 0x00000000\n\nRegisters:\nEAX=0x0000000a, EBX=0x00000001, ECX=0x00289530, EDX=0x00000000\nESP=0x02aefc2c, EBP=0x02aefc44, ESI=0x00289530, EDI=0x00289530\nEIP=0x0806d17a, EFLAGS=0x00010246\n\nTop of Stack: (sp=0x02aefc2c)\n0x02aefc2c:   00289530 081641e8 00000001 0806e4b8\n0x02aefc3c:   00000001 00000000 02aefc9c 0806e4c5\n0x02aefc4c:   081641e8 081641c8 00000001 00289530\n0x02aefc5c:   00000000 00000000 00000001 00000001\n0x02aefc6c:   00000000 00000000 00000000 08072a9e\n0x02aefc7c:   00000000 00000000 00000000 00035378\n0x02aefc8c:   00035378 00280d88 00280d88 147fee00\n0x02aefc9c:   02aefce8 0806e0f5 00000001 00289530\nInstructions: (pc=0x0806d17a)\n0x0806d16a:   15 08 83 3d c0 be 15 08 05 53 56 57 8b f1 75 0f\n0x0806d17a:   0f be 05 00 00 00 00 83 c0 05 a3 c0 be 15 08 8b \n\nStack: [0x02ab0000,0x02af0000),  sp=0x02aefc2c,  free space=255k\nNative frames: (J=compiled Java code, j=interpreted, Vv=VM code, C=native code)\nV  [jvm.dll+0x6d17a]\nV  [jvm.dll+0x6e4c5]\nV  [jvm.dll+0x6e0f5]\nV  [jvm.dll+0x71771]\nV  [jvm.dll+0xfd1d3]\nV  [jvm.dll+0x6cd99]\nV  [jvm.dll+0x504bf]\nV  [jvm.dll+0x6cf4b]\nV  [jvm.dll+0x1175d5]\nV  [jvm.dll+0x1170a0]\nV  [jvm.dll+0x11728f]\nV  [jvm.dll+0x116fd5]\nC  [MSVCRT.dll+0x27fb8]\nC  [kernel32.dll+0x1d33b]\n\nVM_Operation (0x0373f71c): generation collection for allocation, mode:\n safepoint, requested by thread 0x02db7108\n\n<\/code><\/pre>\n<blockquote>\n<p><strong>\u6ce8\u610f\uff1a<\/strong>\u5728\u5783\u573e\u56de\u6536\u65f6\u53d1\u751f\u5d29\u6e83\u4e0d\u4e00\u5b9a\u8868\u793a\u5783\u573e\u6536\u96c6\u5b9e\u73b0\u6709bug\u3002\u5b83\u4e5f\u53ef\u4ee5\u8868\u660e\u7f16\u8bd1\u5668\u6216\u8fd0\u884c\u65f6bug\u6216\u5176\u4ed6\u95ee\u9898\u3002<\/p>\n<\/blockquote>\n<p>\u5982\u679c\u4f60\u5728\u5783\u573e\u6536\u96c6\u65f6\u5f97\u5230\u4e00\u4e2a\u91cd\u590d\u7684\u5d29\u6e83\uff0c\u53ef\u4ee5\u5c1d\u8bd5\u4e0b\u9762\u7684\u4e34\u65f6\u89e3\u51b3\u65b9\u6848\uff1a<\/p>\n<ul>\n<li>\u5207\u6362 GC \u914d\u7f6e\u3002\u4f8b\u5982\uff0c\u5982\u679c\u4f60\u4f7f\u7528\u4e32\u884c\u6536\u96c6\u5668\uff0c\u5c1d\u8bd5\u4f7f\u7528\u541e\u5410\u91cf\u4f18\u5148\u6536\u96c6\u5668\uff0c\u6216\u76f8\u53cd\u3002<\/li>\n<li>\u5982\u679c\u4f60\u4f7f\u7528  HotSpot Server VM\uff0c\u5c1d\u8bd5  HotSpot Client VM\u3002<\/li>\n<\/ul>\n<p>\u5982\u679c\u4f60\u4e0d\u786e\u5b9a\u5728\u4f7f\u7528\u7684\u5783\u573e\u6536\u96c6\u5668\u662f\u54ea\u4e2a\uff0c\u53ef\u4ee5\u7528 jmap \u5b9e\u7528\u7a0b\u5e8f\u4ececore \u6587\u4ef6\u83b7\u53d6\u5806\u4fe1\u606f\uff0c\u5982\u679ccore\u6587\u4ef6\u53ef\u5f97\u3002\u901a\u5e38\uff0c\u5982\u679cGC\u914d\u7f6e\u6ca1\u6709\u5728\u547d\u4ee4\u884c\u6307\u5b9a\uff0c\u5728Windows\u4e0a\u5c06\u4f7f\u7528\u4e32\u884c\u6536\u96c6\u5668\u3002\u5728Solaris OS\u548cLinux\u4e0a\uff0c\u53d6\u51b3\u4e8e\u673a\u5668\u914d\u7f6e\u3002\u5982\u679c\u673a\u5668\u6709\u81f3\u5c112GB\u5185\u5b58\u548c\u81f3\u5c112\u4e2a\u5904\u7406\u5668\uff0c\u5c06\u4f7f\u7528\u541e\u5410\u91cf\u6536\u96c6\u5668\uff08\u5e76\u884cGC\uff09\u3002\u5bf9\u4e8e\u5c0f\u4e00\u70b9\u7684\u673a\u5668\uff0c\u9ed8\u8ba4\u4f7f\u7528\u4e32\u884c\u6536\u96c6\u5668\u3002<code>-XX:+UseSerialGC<\/code> \u6307\u5b9a\u4f7f\u7528\u4e32\u884c\u6536\u96c6\u5668\uff0c<code>-XX:+UseParallelGC<\/code> \u9009\u9879\u9009\u62e9 \u541e\u5410\u91cf\u6536\u96c6\u5668\u3002<\/p>\n<h3>4.2.3  \u7c7b\u6570\u636e\u5171\u4eab\uff0cClass data sharing<\/h3>\n<p>\u8fd9\u4e2a\u4e1c\u897f\u5728HotSpot VM\u91cc\u9650\u5236\u8f83\u591a\uff0cTODO\u3002<\/p>\n<h2>4.3  Microsoft Visual C++ Version Considerations<\/h2>\n<p>TODO<\/p>\n<hr\/>\n<p>\u6b22\u8fce\u5173\u6ce8\u6211\u7684\u5fae\u4fe1\u516c\u4f17\u53f7: <strong>coderbee\u7b14\u8bb0<\/strong>\uff0c\u53ef\u4ee5\u66f4\u53ca\u65f6\u56de\u590d\u4f60\u7684\u8ba8\u8bba\u3002<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" width=\"258\" height=\"258\" src=\"https:\/\/coderbee.net\/wp-content\/uploads\/2019\/01\/coderbee-note.jpg\" class=\"alignnone size-full wp-image-1707\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5d29\u6e83\u6216\u81f4\u547d\u9519\u8bef\u5bfc\u81f4\u8fdb\u7a0b\u5f02\u5e38\u7ec8\u6b62\u3002\u6709\u5404\u79cd\u53ef\u80fd\u7684\u7406\u7531\u5bfc\u81f4\u5d29\u6e83\u3002\u4f8b\u5982\uff0c\u5d29\u6e83\u53ef\u80fd\u662f\u7531\u4e8eH &hellip; <a href=\"https:\/\/coderbee.net\/index.php\/jvm\/20140516\/927\">\u7ee7\u7eed\u9605\u8bfb <span class=\"meta-nav\">&rarr;<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[96],"tags":[231,233,166],"_links":{"self":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/927"}],"collection":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/comments?post=927"}],"version-history":[{"count":3,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/927\/revisions"}],"predecessor-version":[{"id":930,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/posts\/927\/revisions\/930"}],"wp:attachment":[{"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/media?parent=927"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/categories?post=927"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/coderbee.net\/index.php\/wp-json\/wp\/v2\/tags?post=927"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}