首页 > 代码库 > erlang 在线生成crashdump
erlang 在线生成crashdump
一般说来抓dump 4种 方式:
1. erlang:halt(“abort”).
2. 在erlang shell下输入CTRL C + “大写的A”
3.等着进程崩溃自己产生dump
4.kill -SIGUSR1 <pid> (shell 无法进入时可以使用)
不过4个方式无一不是需要node crash掉,如果我只想sapshot 一份进程状态以便分析呢?
在google groups 找到答案,现在链接找不到了,分享一下:
crash_dump() -> Date = erlang:list_to_binary(rfc1123_local_date()), Header = binary:list_to_bin([<<"=erl_crash_dump:0.2\n">>,Date,<<"\nSystem version: ">>]), Ets = ets_info(), Report = binary:list_to_bin([Header,erlang:list_to_binary(erlang:system_info(system_version)), erlang:system_info(info),erlang:system_info(procs),Ets,erlang:system_info(dist), <<"=loaded_modules\n">>,binary:replace(erlang:system_info(loaded), <<"\n">>,<<"\n=mod:">>,[global])]), file:write_file("erl_crash.dump",Report).ets_info() -> binary:list_to_bin([ets_table_info(T)||T<-ets:all()]).ets_table_info(Table) -> Info = ets:info(Table), Owner = erlang:list_to_binary(erlang:pid_to_list(proplists:get_value(owner,Info))), TableN = erlang:list_to_binary(erlang:atom_to_list(proplists:get_value(name,Info))), Name = erlang:list_to_binary(erlang:atom_to_list(proplists:get_value(name,Info))), Objects = erlang:list_to_binary(erlang:integer_to_list(proplists:get_value(size,Info))), binary:list_to_bin([<<"=ets:">>,Owner,<<"\nTable: ">>,TableN,<<"\nName: ">>,Name, <<"\nObjects: ">>,Objects,<<"\n">>]).rfc1123_local_date() -> rfc1123_local_date(os:timestamp()).rfc1123_local_date({A,B,C}) -> rfc1123_local_date(calendar:now_to_local_time({A,B,C}));rfc1123_local_date({{YYYY,MM,DD},{Hour,Min,Sec}}) -> DayNumber = calendar:day_of_the_week({YYYY,MM,DD}), lists:flatten( io_lib:format("~s, ~2.2.0w ~3.s ~4.4.0w ~2.2.0w:~2.2.0w:~2.2.0w GMT", [httpd_util:day(DayNumber),DD,httpd_util:month(MM),YYYY,Hour,Min,Sec]));rfc1123_local_date(Epoch) when erlang:is_integer(Epoch) -> rfc1123_local_date(calendar:gregorian_seconds_to_datetime(Epoch+62167219200)).
erlang 的crash dump 是一个进程详细信息快照的文本文件,此方式自己拼接一个类似的文件,嗯crash_dumpviewer 会有警告,不过还是很好用。
参考:erlang的erl_crash.dump产生以及如何解读
erlang 在线生成crashdump
声明:以上内容来自用户投稿及互联网公开渠道收集整理发布,本网站不拥有所有权,未作人工编辑处理,也不承担相关法律责任,若内容有误或涉及侵权可进行投诉: 投诉/举报 工作人员会在5个工作日内联系你,一经查实,本站将立刻删除涉嫌侵权内容。