To implement custom panic and recover mechanisms using runtime.Stack(), you can follow these steps:
First, import the necessary packages:
import (
"fmt"
"runtime"
)
Define a custom panic handler function that takes in an interface{} as a parameter:
func customPanicHandler(err interface{}) {
// Use runtime.Stack() to get a stack trace of the panic
stackTrace := make([]byte, 1024)
runtime.Stack(stackTrace, false)
// Print the error and stack trace
fmt.Printf("Panic: %v\n%s", err, stackTrace)
// Optionally, handle the panic gracefully by recovering
// recover()
}
Inside the custom panic handler function, you can use runtime.Stack() to get a stack trace of the panic. The stack trace is stored in the stackTrace variable.
Set the custom panic handler using panic() at the beginning of your program or wherever you want to handle panics:
func main() {
defer customPanicHandler(recover())
// Rest of your program
// ...
panic("Something went wrong!")
}
By using the defer keyword before the custom panic handler, it will ensure that the customPanicHandler function is called when a panic occurs.
The recover() function is used to catch the panic and pass it to the custom panic handler.
Optionally, if you want to recover from the panic and continue execution, uncomment the recover() line in the customPanicHandler function.
Now, when a panic occurs, the custom panic handler function customPanicHandler will be called. It will print the error and the stack trace using fmt.Printf(), and you can add any additional logic or error handling inside the custom panic handler function as needed.