Subscriber for passing spans from a rust library to a profiling tool in a host application via FFI.
A simple crate for passing spans generated by the tracing ecosystem to a C or C++ profiling system when Rust is
integrated into an existing framework. To help with integration into other tools you can use the environment variable
TRACING_FFI_RELATIVE_OUT_DIR to configure where the include file ends relative to the build output (OUT_DIR). For
example, TRACING_FFI_RELATIVE_OUT_DIR = "../../../../../include" will normally lead to the files being generated in an
include dir next to your Cargo.toml.
#include <Profiling.h>
#include <tracing_ffi.h>
#include <myrustlib.h>
int main(int argc, const char* argv[]) {
tracing_ffi_ReturnCode result = tracing_ffi_install_global_with_enable(
profiling_begin_named_scope,
profiling_end_named_scope,
profiling_is_enabled,
);
if (result != tracing_ffi_ReturnCode_Success) {
return (int)result;
}
myrustlib_execute(10, 20);
profiling_write_file("profile.json");
}You can of course also configure this from Rust code; and bypass the C-api. In that case, use
subscriber::ExternFFISpanSubscriber directly, and install with your preferred tracing method.
We welcome community contributions to this project.
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Any contribution intentionally submitted for inclusion in an Embark Studios project, shall comply with the Rust standard licensing model (MIT OR Apache 2.0) and therefore be dual licensed as described below, without any additional terms or conditions:
This contribution is dual licensed under EITHER OF
- Apache License, Version 2.0, (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
- MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)
at your option.
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