How Can Go Applications Interact with Functions Inside a .so File?

Invoking Functions in an SO File from Go

Question: Can Go applications interact with functions in a static object (.so) file?

Answer: Yes, it is feasible to load and invoke functions from a library using Go. However, the built-in syscall package does not provide the LoadLibrary function, despite online claims to the contrary.

To accomplish this, you can leverage cgo, a tool that bridges C and Go code. Here's an example using dlopen and related functions from the POSIX C library:

<code class="go">// #cgo LDFLAGS: -ldl
// #include <dlfcn.h>
import "C"

import fmt

func foo() {
    handle := C.dlopen(C.CString("libfoo.so"), C.RTLD_LAZY)
    bar := C.dlsym(handle, C.CString("bar"))
    fmt.Printf("bar is at %p\n", bar)
}</dlfcn.h></code>

In this example:

• LDFLAGS specifies that the dlopen library should be linked to the Go program.
• dlopen loads the shared object into memory.
• dlsym retrieves the address of the bar function within the loaded library.
• The fmt.Printf statement outputs the memory address where bar resides.

By following this approach, you can seamlessly call functions in external libraries from your Go code.

The above is the detailed content of How Can Go Applications Interact with Functions Inside a .so File?. For more information, please follow other related articles on the PHP Chinese website!