## Why Does My Go C-Shared Library Hang on Network Calls After Forking?

Debugging a C-Shared Library (Written in Go) Hanging on Network Calls

A user encountered an issue where a Go library compiled as a C-shared library (using -buildmode=c-shared) hangs on a network call via http.Post(). While the executable version of the library works correctly, the shared library exhibits unexpected behavior.

Post analysis, the issue was found to be related to the Go runtime's lifecycle management. When the Go C-shared library is linked to a C/C application, the Go runtime gets loaded upon application startup. However, if a process is forked after this initial loading and the Go library is used within the forked process, unpredictable behavior can occur.

Solution:

To resolve this issue, it is necessary to control the loading of the Go runtime. Utilize the dlopen() and dlsym() C functions to dynamically load the Go shared library into the forked process. This allows for manual control over when the Go runtime is loaded, ensuring stable behavior.

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