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I need to debug some module in foreign system. The module has public function foo() - how can I know place (module and function name)
from which foo() given module was called? I mean stack of calls.
I cannot stop system, all work I can do by reload this module (but with some debug info).
-module(given).
-export(foo/0).
foo() ->
%% here is my debug - and
%% i need here(!) known about unknown_module:unknown_foo!
ok.
---
-module(unknown_module).
..
unknown_foo() ->
given:foo(). %% see above
505
In computer science, a call stack is a stack data structure that stores information about the active subroutines of a computer program. This kind of stack is also known as an execution stack, program stack, control stack, run-time stack, or machine stack, and is often shortened to just "the stack".
A call stack is typically "the current stack of operations" - i.e. while it's running. A stack trace is typically a copy of the call stack which is logged at some sort of failure, e.g. an exception.
A call stack, in C#, is the list of names of methods called at run time from the beginning of a program until the execution of the current statement. A call stack is mainly intended to keep track of the point to which each active subroutine should return control when it finishes executing.
Here's a simple trick:
Trace = try throw(42) catch 42 -> erlang:get_stacktrace() end,
erlang:display(Trace)
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