commit | 25bcac0d793cf4109483505a0d66e066a3a90a80 | [log] [tgz] |
---|---|---|
author | Marc-Antoine Ruel <maruel@chromium.org> | Mon Feb 27 22:23:42 2017 |
committer | Marc-Antoine Ruel <maruel@chromium.org> | Mon Feb 27 22:28:18 2017 |
tree | f7665a35a48ecdc3996f32e40fc30b99270d422c | |
parent | 410fa3b6678b92c36412651d71616da82bf3439b [diff] |
Update vendor/ Keep golang.org/x/sys stripped out because it is large.
Parses panic stack traces, densifies and deduplicates goroutines with similar stack traces. Helps debugging crashes and deadlocks in heavily parallelized process.
panicparse helps make sense of Go crash dumps:
50% more compact output than original stack dump yet more readable.
go get github.com/maruel/panicparse/cmd/pp
|&
|&
2>&1 |
^|
pp
streams its stdin to stdout as long as it doesn‘t detect any panic. panic()
and Go’s native deadlock detector print to stderr via the native print()
function.
Bash v4 or zsh: |&
tells the shell to redirect stderr to stdout, it's an alias for 2>&1 |
(bash v4, zsh):
go test -v |&pp
Windows or OSX native bash (which is 3.2.57): They don't have this shortcut, so use the long form:
go test -v 2>&1 | pp
Fish: It uses ^ for stderr redirection so the shortcut is ^|
:
go test -v ^|pp
PowerShell: It has broken 2>&1
redirection. The workaround is to shell out to cmd.exe. :(
On POSIX, use Ctrl-\
to send SIGQUIT to your process, pp
will ignore the signal and will parse the stack trace.
To dump to a file then parse, pass the file path of a stack trace
go test 2> stack.txt pp stack.txt
Starting with Go 1.6, GOTRACEBACK
defaults to single
instead of all
/ 1
that was used in 1.5 and before. To get all goroutines trace and not just the crashing one, set the environment variable:
export GOTRACEBACK=all
or set GOTRACEBACK=all
on Windows. Probably worth to put it in your .bashrc
.
Install bash v4+ on OSX via homebrew or macports. Your future self will appreciate having done that.
/usr/bin/pp
installedYou may have the Perl PAR Packager installed. Use long name panicparse
then;
go get github.com/maruel/panicparse