Error trying to call my C function #251
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Dear purego community, package main
import (
"fmt"
"github.com/ebitengine/purego"
"unsafe"
)
type HelloFunc func()
func main() {
var libPath string
libPath = "./libmesa_ffi.so"
// Load the library
handle, err := purego.Dlopen(libPath, purego.RTLD_NOW)
if err != nil {
fmt.Print("Error loading library: %v\n", err)
return
}
defer purego.Dlclose(handle)
// Resolve the symbol for the function we want to call
helloSymbol, err := purego.Dlsym(handle, "helloworld")
if err != nil {
fmt.Print("Error resolving symbol: %v\n", err)
return
}
// Check if the symbol address is nil
if helloSymbol == 0 {
fmt.Println("Symbol address is null")
return
}
// Convert the symbol address to a function pointer
hello := *(*HelloFunc)(unsafe.Pointer(&helloSymbol))
// Call the function
hello()
}The code compiles but fails during runtime Any idea of what could be wrong? thank you very much |
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Answered by
TotallyGamerJet
May 24, 2024
Replies: 1 comment
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Most of the time you don't want to directly call Dlsym. The recommended way is to use RegisterLibFunc. Look at the examples folder: https://github.com/ebitengine/purego/blob/main/examples/libc/main.go |
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0 replies
Answer selected by
hajimehoshi
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Most of the time you don't want to directly call Dlsym. The recommended way is to use RegisterLibFunc. Look at the examples folder: https://github.com/ebitengine/purego/blob/main/examples/libc/main.go