feat(injector): add custom Dash0 LD_PRELOAD injector #155
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TODOs as of f292f12: ✅ |
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Add LD_PRELOAD injector binary to the Dash0 instrumentation image. This image works irrespective of the libc flavour used by the dynamically-linked host process (e.g., Node v8, CPython, JVM). Environment variables that the host process looks up through getenv are modified on the fly, to inject Dash0 OpenTelemetry distributions. For now, this is only implemented for Node.js via NODE_OPTIONS. The injector replicates a subset of internal libc APIs related to string comparison and manipulation. This code is adapted from musl libc, and the respective copyright notice is included.
Also: - refactor test scripts - lint scripts with shellcheck
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Also: Enable both tests to use an existing (local or remote) instrumentation image instead of building the instrumentation image from local sources.
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Add to the Dash0 instrumentation image an
LD_PRELOADinjector that:getenvLibC API (currently implemented:NODE_OPTIONS)The injector replicates internally a subset of the libc APIs related with string comparison and manipulation. That code is adapted from muse libc, and the respective copyright notice is included.