{"id":96630,"date":"2020-04-21T13:45:06","date_gmt":"2020-04-21T05:45:06","guid":{"rendered":"http:\/\/4563.org\/?p=96630"},"modified":"2020-04-21T13:45:06","modified_gmt":"2020-04-21T05:45:06","slug":"node-%e4%b8%8a%e7%9a%84%e8%8e%b7%e5%8f%96%e5%bd%93%e5%89%8d%e6%97%b6%e9%97%b4%e6%98%af%e8%b0%83%e7%94%a8%e7%b3%bb%e7%bb%9f%e7%9a%84-api-%e5%90%97%ef%bc%9f","status":"publish","type":"post","link":"http:\/\/4563.org\/?p=96630","title":{"rendered":"node \u4e0a\u7684\u83b7\u53d6\u5f53\u524d\u65f6\u95f4\u662f\u8c03\u7528\u7cfb\u7edf\u7684 api \u5417\uff1f"},"content":{"rendered":"
\n
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\n

node \u4e0a\u7684\u83b7\u53d6\u5f53\u524d\u65f6\u95f4\u662f\u8c03\u7528\u7cfb\u7edf\u7684 api \u5417\uff1f <\/h1>\n

<\/p>\n

\n
\u8cc7\u6df1\u5927\u4f6c : wszgrcy <\/span> <\/i> 58<\/span> <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n<\/p><\/div>\n
<\/p>\n

\u867d\u7136 js \u4e0d\u662f\u76f4\u63a5\u8dd1\u5728\u7cfb\u7edf\u91cc\u7684\uff0c\u4f46\u662f\u8fd8\u662f\u60f3\u77e5\u9053\u70b9 node \u548c\u7cfb\u7edf\u4e4b\u95f4\u7684\u5173\u7cfb\uff0c\u6bd4\u5982\u83b7\u5f97\u65f6\u95f4\u662f\u4e0d\u662f\u4e5f\u662f\u8c03\u7528\u7684\u7cfb\u7edf api\uff0c\u548c\u5728 windows \u4e0b\u7528 ffi \u8c03\u7528\u5b83\u7684 api \u662f\u5426\u80fd\u83b7\u5f97\u76f8\u540c\u7684\u7ed3\u679c\uff1f\u6709\u8fd9\u65b9\u9762\u7684\u5927\u4f6c\u5417<\/p>\n<\/p><\/div>\n

\u5927\u4f6c\u6709\u8a71\u8aaa<\/b> (8<\/span>) <\/div>\n
<\/div>\n<\/p><\/div>\n<\/p><\/div>\n
    \n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : no1xsyzy <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4f60\u9664\u4e86\u8c03\u7528\u7cfb\u7edf API \u8fd8\u80fd\u600e\u4e48\u505a\uff1f
    1\u3001\u76f4\u63a5\u548c\u786c\u4ef6\u6c9f\u901a\u8bfb CMOS \u65f6\u95f4\uff1b
    2\u3001\u7f51\u7edc\u65f6\u95f4\u3002<\/p>\n

    1 \u7684\u8bdd\uff0c\u6211\u4e0d\u77e5\u9053\u600e\u4e48\u64cd\u4f5c\uff0c\u4f46\u7ed3\u679c\u548c\u7cfb\u7edf\u65f6\u95f4\u4e00\u6837\uff0c\u56e0\u4e3a\u7cfb\u7edf\u65f6\u95f4\u4e5f\u5c31\u662f CMOS \u65f6\u95f4\u2026\u2026 \u9664\u975e\u88ab LD_PRELOAD \u4e4b\u7c7b\u66ff\u6362\u6389 syscall \uff1f
    2 \u7684\u8bdd\uff0c\u5176\u4e2d\u5305\u542b \u201c\u9700\u8981\u8054\u7f51\u201d \u8fd9\u4e00\u524d\u63d0\u548c \u201c\u901a\u8fc7 NTP \u534f\u8bae\u8fdb\u884c\u4e86\u4ea4\u4e92\u201d \u8fd9\u4e00 side effect\uff0c\u5e94\u5f53\u663e\u5f0f\u6307\u660e\u3002 <\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : yafoo <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @no1xsyzy \u770b\u5230\u95ee\u9898\uff0c\u6211\u4e5f\u5728\u60f3\u600e\u4e48\u8bfb\u53d6\u65f6\u95f4\uff0c\u4f60\u7684\u56de\u7b54\u4e00\u4e0b\u6253\u5f00\u4e86\u601d\u8def\uff0c\u8c8c\u4f3c\u53ea\u80fd\u8c03\u7528\u7cfb\u7edf api <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : monsterxx03 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u4f60\u5199\u4e2a\u7a0b\u5e8f\u5728\u6b7b\u5faa\u73af\u91cc\u4e0d\u505c\u53d6\u65f6\u95f4\uff0c\u7136\u540e strace \u770b\u5b83\u7528\u4e86\u4ec0\u4e48 syscall \u5c31\u77e5\u9053\u4e86 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : azh7138m <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u662f\u7684\uff0c\u89c1 https:\/\/sourcegraph.com\/github.com\/v8\/[email protected]<\/span>\/-\/blob\/src\/base\/platform\/time.cc?utm_source=share#L306:7
    posix \u4e0b\u7528\u4e86 gettimeofday
    win \u4e0b\u4f1a\u5206\u4e24\u79cd\u60c5\u51b5\u505a\u8ba8\u8bba
    \u90fd\u4f1a\u7528\u5230 GetSystemTimeAsFileTime <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : azh7138m <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    = = \u6211\u5e94\u8be5\u53bb\u6389\u5c0f\u5c3e\u5df4\u7684
    \u4e0d\u8fc7\u90fd\u5728\u8fd9\u4e2a\u6587\u4ef6\u91cc\u9762\uff0c\u4e0a\u4e0b\u7ffb\u4e00\u4e0b\u5c31\u884c\u4e86
    JSDate \u6700\u540e\u5e94\u8be5\u662f\u8c03\u5230\u8fd9\u4e2a\u5730\u65b9\u7684 <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : yangkeao <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @monsterxx03 clock_gettime \u5f88\u5de7\u7684\u662f\u5927\u90e8\u5206\u65f6\u5019 strace \u770b\u4e0d\u89c1\uff0c\u56e0\u4e3a\u65f6\u95f4\u76f8\u5173\u53ef\u4ee5\u7528 vDSO\uff0c\u800c\u4e0d\u7528\u771f\u7684 syscall\u3002<\/p>\n

    \u65e2\u7136\u662f vDSO\uff0c\u90a3\u4e48\u5b83\u5c31\u80fd\u5728\u7528\u6237\u6001\u5b9e\u73b0\u3002\u5b9e\u73b0\u4e0a\u6839\u636e\u8981\u6c42\u7684\u7cbe\u5ea6\u4e0d\u540c\u4f1a\u6709\u5dee\u5f02\uff0c\u5176\u4e2d\u4e4b\u4e00\u843d\u5230 rdtsc \u6307\u4ee4 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : yangkeao <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    \u81f3\u4e8e\u662f\u5982\u4f55\u8c03\u7528\u7684\uff0c\u5c31\u5f97\u5177\u4f53\u60c5\u51b5\u5177\u4f53\u5206\u6790\u3002\u5982\u679c\u901a\u8fc7 glibc \u8c03\u7528 clock_gettime \u51fd\u6570\uff0c\u90a3\u4e48\u4f1a\u8d70 vDSO\u3002<\/p>\n

    \u4e5f\u53ef\u4ee5\u50cf go runtime \u505a\u7684\u90a3\u6837\uff0c\u76f4\u63a5\u89e3\u6790 auxv\u3001\u89e3\u6790\u7b26\u53f7\u3001\u8c03\u7528 vdso\u3002<\/p>\n

    \u4e5f\u53ef\u4ee5\u76f4\u63a5 syscall 225 \uff08\u5927\u6982\u662f\u8fd9\u4e2a\u6570\uff0c\u4e0d\u786e\u5b9a\uff09\uff0c\u8fd9\u6837\u5c31\u4e0d\u662f\u901a\u8fc7 vdso \u7684\uff0cstrace \u5c31\u80fd\u770b\u89c1\u3002\u5f53\u7136\uff0c\u5728\u4e00\u4e9b\u6781\u7aef\u60c5\u51b5\u4e0b\uff0cvdso \u4f1a fallback \u5230\u7cfb\u7edf\u8c03\u7528\u4e0a\u3002<\/p>\n

    node \u662f\u5565\u60c5\u51b5\u53ef\u80fd\u5f97\u81ea\u5df1\u63a2\u7d22\u4e00\u756a\uff0c\u4e5f\u65e0\u5916\u4e4e\u8fd9\u51e0\u6837\u4e86\u3002<\/p>\n

    \uff08\u6700\u8fd1\u4e86\u89e3\u4e86\u4e00\u4e9b\u8fd9\u65b9\u9762\u77e5\u8bc6\uff0c\u56e0\u4e3a\u5728\u505a\u4e00\u4e2a\u8fd0\u884c\u65f6\u6ce8\u5165\u7a0b\u5e8f\u4fee\u6539\u65f6\u95f4\u7684\u5de5\u5177 <\/p><\/div>\n<\/p><\/div>\n<\/li>\n

  • \n
    \n
    \n
    \u8cc7\u6df1\u5927\u4f6c : ysc3839 <\/span> <\/div>\n
    <\/i> <\/span> <\/div>\n<\/p><\/div>\n
    @azh7138m \u60f3\u95ee\u4e00\u4e0b\u201cwin \u4e0b\u4f1a\u5206\u4e24\u79cd\u60c5\u51b5\u505a\u8ba8\u8bba\u201d\u5177\u4f53\u662f\u4ec0\u4e48\u60c5\u51b5\uff1f <\/div>\n<\/p><\/div>\n<\/li>\n
  • \n","protected":false},"excerpt":{"rendered":"

    node \u4e0a\u7684\u83b7\u53d6\u5f53\u524d\u65f6\u95f4\u662f\u8c03\u7528\u7cfb…<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[],"tags":[],"_links":{"self":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/96630"}],"collection":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=96630"}],"version-history":[{"count":0,"href":"http:\/\/4563.org\/index.php?rest_route=\/wp\/v2\/posts\/96630\/revisions"}],"wp:attachment":[{"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=96630"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=96630"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/4563.org\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=96630"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}