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Suppose I have something like this :
try code_that_fails()
catch _:_ -> .....
How do I print the stacktrace in the catch block? That block catches all exceptions, but I don't know how to print the stack...
Can you help me?
340
Using printStackTrace() method − It print the name of the exception, description and complete stack trace including the line where exception occurred. Using toString() method − It prints the name and description of the exception. Using getMessage() method − Mostly used. It prints the description of the exception.
A trace of the method calls is called a stack trace. The stack trace listing provides a way to follow the call stack to the line number in the method where the exception occurs. The StackTrace property returns the frames of the call stack that originate at the location where the exception was thrown.
When the exception is restored, the following string is inserted in the stack trace to indicate the restore point: "End of stack trace from the previous location where the exception was thrown". This is similar to the way inner exceptions or marshaled exceptions are indicated in stack traces.
From Erlang 21.0 onwards, there's a new official way to get the stack trace. An optional pattern match in the try expression on the third parameter in the exception, which will contain the stack trace:
try
code_that_fails()
catch
_:_:Stacktrace ->
erlang:display(Stacktrace)
end
For versions of Erlang/OTP 20 and below, you need to use get_stacktrace/0, which allows you to get the stacktrace of the last exception in the calling process:
try
code_that_fails()
catch
_:_ ->
erlang:display(erlang:get_stacktrace())
end
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