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README.md

corevis

Generate HTML based on information gathered with mdb(1) from a node.js core dump

Example: http://us-east.manta.joyent.com/devops@voxer.com/public/corevis/example.html

Installation

[sudo] npm install -g corevis

Usage

At Voxer, we use commands similar to the ones below to ensure that all core dumps go to a specific directory

mkdir /core
coreadm -g /core/core.%f.%p -G all -e global -d process -e global-setid -d proc-setid -I all -e log

Run any of the examples to generate a core dump, then use corevis to make an HTML file with analysis.

[root@test1 ~/node-corevis]# node examples/big-objects.js
pid 9986
Abort (core dumped)
[root@test1 ~/node-corevis]# ./corevis.js /core/core.node.9986 > example.html
> loading /core/core.node.9986... 147ms
> getting status... 896ms
> loading v8... 66ms
> getting stack trace... 37ms
> finding jsobjects (this can take a while)... 13585ms
> calling ::jsprint -a on all objects found... 21975ms
> analyzing data... 631ms
> loading assets... 15ms
> generating HTML... 167ms
> killing mdb... 10ms
> done. took 37.53 seconds...

CLI Usage

Usage: corevis [options] <node coredump>

Generate HTML based on information gathered with mdb(1) from
a node.js core dump

Examples
    $ corevis core.node.1234 > vis.html
    $ corevis --load /var/tmp/v8-new.so core.node.1234 > vis.html

Options
  -h, --help       print this message and exit
  -l, --load <v8>  argument to pass to `::load` in mdb(1), defaults to "v8"
  -u, --updates    check npm for available updates to this program
  -v, --version    print the version number and exit

License

MIT License

About

Generate HTML based on information gathered with mdb(1) from a node.js core dump

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