package trace-fuchsia

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A high-performance backend for trace, emitting a Fuchsia trace into a file

Install

Dune Dependency

github.com Readme Changelog Edit opam file Versions (6)

Authors

S

Simon Cruanes

Maintainers

S

Simon Cruanes

Sources

trace-0.7.tbz

sha256=ebd0be29b30b49536c9659882790b9f0c121ffb06c0bec2eaeba8cfed4909339

sha512=d14b72db713315093c931351b9b04d2fd5ce793a8595970fa31cbf71477516ef25de129adddf4075514581fe9ea3e27d998530efacb17c0d00bb5616b8d18b91

doc/trace-fuchsia/Trace_fuchsia/index.html

Module `Trace_fuchsia`Source

Fuchsia trace collector.

This provides a collector for traces that emits data into a file using the compact binary Fuchsia trace format. This reduces the tracing overhead compared to trace-tef, at the expense of simplicity.

Source

val collector : 
  out:[ `File of string | `Stderr | `Stdout ] ->
  unit ->
  Trace_core.collector

Make a collector that writes into the given output. See setup for more details.

Sourcetype output = [

| `Stdout
| `Stderr
| `File of string

]

Output for tracing.

`Stdout will enable tracing and print events on stdout
`Stderr will enable tracing and print events on stderr
`File "foo" will enable tracing and print events into file named "foo"

Sourceval setup : ?out:[ output | `Env ] -> unit -> unit

setup () installs the collector depending on out.

parameter out
can take different values:
- regular output value to specify where events go
- `Env will enable tracing if the environment variable "TRACE" is set.

If it's set to "1", then the file is "trace.fxt".
If it's set to "stdout", then logging happens on stdout (since 0.2)
If it's set to "stderr", then logging happens on stdout (since 0.2)
Otherwise, if it's set to a non empty string, the value is taken to be the file path into which to write.

Sourceval with_setup : ?out:[ output | `Env ] -> unit -> (unit -> 'a) -> 'a

with_setup () f (optionally) sets a collector up, calls f(), and makes sure to shutdown before exiting.