Parses panic stack traces, densifies and deduplicates goroutines with similar stack traces. Helps debugging crashes and deadlocks in heavily parallelized process.
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50% more compact output than original stack dump yet more readable.
- Exported symbols are bold, private symbols are darker.
- Stdlib is green, main is yellow, rest is red.
- Deduplicate redundant goroutine stacks. Useful for large server crashes.
- Arguments as pointer IDs instead of raw pointer values.
- Pushes stdlib-only stacks at the bottom to help focus on important code.
- Usable as a library!
- Works on Windows.
go get github.com/maruel/panicparse/cmd/pp
Run test and prints a concise stack trace upon deadlock in bash
go test -v |&pp
|& tells bash to redirect stderr to stdout, it's an alias for 2>&1 |.
panic() and Go's native deadlock detector always print to stderr.
On Windows, use:
go test -v 2>&1 | pp
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
You may have the Perl PAR Packager installed. Use long name panicparse then;
go get github.com/maruel/panicparse
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