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3d5f093ddb
* Update `tracing`-related dependencies * Enable `parking_lot` feature in `tracing-subscriber` * Add an asynchronous stderr logger * Make clippy happy * Add an integration test for the logger * Refactor `test_logger_filters`'s subprocess machinery into a separate function * Use a child process instead of hooking into stderr for the test * Add a doc comment for `MakeStderrWriter` * Move the initialization into the `MakeStderrWriter`'s constructor * Add an extra test case to trigger the logger's emergency flush mechanism * Use the buffer's mutex for asynchronous flushes * Remove vestigial `nix` dependency from one of the previous commits
Substrate tracing primitives and macros.
To trace functions or individual code in Substrate, this crate provides [within_span]
and [enter_span]. See the individual docs for how to use these macros.
Note that to allow traces from wasm execution environment there are
2 reserved identifiers for tracing Field recording, stored in the consts:
WASM_TARGET_KEY and WASM_NAME_KEY - if you choose to record fields, you
must ensure that your identifiers do not clash with either of these.
Additionally, we have a const: WASM_TRACE_IDENTIFIER, which holds a span name used
to signal that the 'actual' span name and target should be retrieved instead from
the associated Fields mentioned above.
License: Apache-2.0