-spec action_at_break(Module, Line, Action) -> ok
                         when Module :: module(), Line :: integer(), Action :: enable | disable | delete.

Sets the trigger action of the breakpoint at Line in Module to Action.

-spec all_breaks() -> [Break]
                    when
                        Break :: {Point, Options},
                        Point :: {Module, Line},
                        Module :: module(),
                        Line :: integer(),
                        Options :: [Status | Trigger | null | Cond],
                        Status :: active | inactive,
                        Trigger :: enable | disable | delete,
                        Cond :: null | Function,
                        Function :: {Module, Name},
                        Name :: atom().

Gets all breakpoints.

-spec all_breaks(Module) -> [Break]
                    when
                        Break :: {Point, Options},
                        Point :: {Module, Line},
                        Module :: module(),
                        Line :: integer(),
                        Options :: [Status | Trigger | null | Cond],
                        Status :: active | inactive,
                        Trigger :: enable | disable | delete,
                        Cond :: null | Function,
                        Function :: {Module, Name},
                        Name :: atom().

Gets all breakpoints in module Module.

-spec auto_attach() -> false | {Flags, Function}
                     when
                         Flags :: [init | break | exit],
                         Function :: {Module, Name, Args},
                         Module :: module(),
                         Name :: atom(),
                         Args :: [term()].

Gets how to attach automatically to a process executing code in interpreted modules.

See auto_attach/2 for the meaning of the possible values in Flags.

-spec auto_attach(false) -> term().

Disables auto attach.

-spec auto_attach(Flags, Function) -> term()
                     when
                         Flags :: [init | break | exit],
                         Function :: {Module, Name, Args},
                         Module :: module(),
                         Name :: atom(),
                         Args :: [term()].

Sets when and how to attach automatically to a process executing code in interpreted modules.

By default when the interpreter is started, automatic attach is disabled.

If Flags is an empty list, automatic attach is disabled.

Otherwise Flags should be a list containing at least one of the following flags:

• init - Attach when a process for the first time calls an interpreted function.
• break - Attach whenever a process reaches a breakpoint.
• exit - Attach when a process terminates.

When the specified event occurs, the function Function is called as:

spawn(Module, Name, [Pid | Args])

Pid is the pid of the process executing interpreted code.

-spec break(Module, Line) -> ok | {error, break_exists} when Module :: module(), Line :: integer().

Creates a breakpoint at Line in Module.

-spec break_in(Module, Name, Arity) -> ok | {error, function_not_found}
                  when Module :: module(), Name :: atom(), Arity :: integer().

Creates a breakpoint at the first line of every clause of function Module:Name/Arity.

-spec clear() -> ok.

Clears information about processes executing interpreted code by removing all information about terminated processes.

-spec continue(Pid :: pid()) -> ok | {error, not_interpreted}.

Resumes process execution for Pid.

-spec continue(X, Y, Z) -> ok | {error, not_interpreted}
                  when X :: integer(), Y :: integer(), Z :: integer().

Resumes process execution for c:pid(X, Y, Z).

-spec del_break_in(Module, Name, Arity) -> ok | {error, function_not_found}
                      when Module :: module(), Name :: atom(), Arity :: integer().

Deletes the breakpoints at the first line of every clause of function Module:Name/Arity.

-spec delete_break(Module, Line) -> ok when Module :: module(), Line :: integer().

Deletes the breakpoint at Line in Module.

-spec disable_break(Module, Line) -> ok when Module :: module(), Line :: integer().

Makes the breakpoint at Line in Module inactive.

-spec enable_break(Module, Line) -> ok when Module :: module(), Line :: integer().

Makes the breakpoint at Line in Module active.

-spec file(Module) -> File | {error, not_loaded} when Module :: module(), File :: file:filename_all().

Returns the source code filename File for an interpreted module Module.

-spec get_binding(Var, Bindings) -> {value, Value} | unbound
                     when Var :: atom(), Bindings :: term(), Value :: term().

Retrieves the binding of Var from Bindings.

This function is intended to be used by the conditional function of a breakpoint.

-spec i(AbsModules) -> ok
           when
               AbsModules :: [AbsModule],
               AbsModule :: Module | File,
               Module :: module(),
               File :: file:name_all();
       (AbsModule) -> {module, Module} | error
           when AbsModule :: Module | File, Module :: module(), File :: file:name_all().

Interprets the specified module(s) on the local node.

A module can be specified by its module name (atom) or filename.

If specified by its module name, the object code Module.beam is searched for in the current path. The source code Module.erl is searched for first in the same directory as the object code, then in an src directory next to it.

If specified by its filename, the filename can include a path and the .erl extension can be omitted. The object code Module.beam is searched for first in the same directory as the source code, then in an ebin directory next to it, and then in the current path.

Note

The interpreter requires both the source code and the object code. The object code must include debug information, that is, only modules compiled with option debug_info can be interpreted.

The functions returns {module,Module} if the module was interpreted, otherwise error is returned.

The argument can also be a list of modules or filenames, in which case the function tries to interpret each module as specified earlier. The function then always returns ok, but prints some information to stdout if a module cannot be interpreted.

-spec interpretable(AbsModule) -> true | {error, Reason}
                       when
                           AbsModule :: Module | File,
                           Module :: module(),
                           File :: file:name_all(),
                           Reason :: no_src | no_beam | no_debug_info | badarg | {app, App},
                           App :: atom().

Checks if a module can be interpreted.

The module can be specified by its module name Module or its source filename File. If specified by a module name, the module is searched for in the code path.

The function returns true if all of the following apply:

• Both source code and object code for the module is found.
• The module has been compiled with option debug_info set.
• The module does not belong to any of the applications Kernel, STDLIB, WX, or Debugger.

The function returns {error,Reason} if the module cannot be interpreted. Reason can have the following values:

• no_src - No source code is found. It is assumed that the source code and object code are located either in the same directory, or in src and ebin directories next to each other.

• no_beam - No object code is found. It is assumed that the source code and object code are located either in the same directory, or in src and ebin directories next to each other.

• no_debug_info - The module has not been compiled with option debug_info set.

• badarg - AbsModule is not found. This could be because the specified file does not exist, or because code:which/1 does not return a BEAM filename, which is the case not only for non-existing modules but also for modules that are preloaded or cover-compiled.

• {app,App} - App is kernel, stdlib, gs, or debugger if AbsModule belongs to one of these applications.

Notice that the function can return true for a module that is not interpretable the module is marked as sticky or resides in a directory marked as sticky. The reason is that this is not discovered until the interpreter tries to load the module.

-spec interpreted() -> [Module] when Module :: module().

Returns a list with all interpreted modules.

-spec n(AbsModule) -> ok
           when
               AbsModule :: Module | File | [Module | File], Module :: module(), File :: file:name_all().

Stops interpreting the specified module on the local node.

Similar to i/1 and ni/1, a module can be specified by its module name or filename.

-spec ni(AbsModules) -> ok
            when
                AbsModules :: [AbsModule],
                AbsModule :: Module | File,
                Module :: module(),
                File :: file:name_all();
        (AbsModule) -> {module, Module} | error
            when AbsModule :: Module | File, Module :: module(), File :: file:name_all().

Interprets the specified module(s) on all known nodes.

A module can be specified by its module name (atom) or filename.

If specified by its module name, the object code Module.beam is searched for in the current path. The source code Module.erl is searched for first in the same directory as the object code, then in an src directory next to it.

If specified by its filename, the filename can include a path and the .erl extension can be omitted. The object code Module.beam is searched for first in the same directory as the source code, then in an ebin directory next to it, and then in the current path.

Note

The interpreter requires both the source code and the object code. The object code must include debug information, that is, only modules compiled with option debug_info can be interpreted.

The functions returns {module,Module} if the module was interpreted, otherwise error is returned.

The argument can also be a list of modules or filenames, in which case the function tries to interpret each module as specified earlier. The function then always returns ok, but prints some information to stdout if a module cannot be interpreted.

-spec nn(AbsModule) -> ok
            when
                AbsModule :: Module | File | [Module | File],
                Module :: module(),
                File :: file:name_all().

Stops interpreting the specified module on all known nodes.

Similar to i/1 and ni/1, a module can be specified by its module name or filename.

-spec no_break() -> ok.

Deletes all breakpoints.

-spec no_break(Module :: term()) -> ok.

Deletes all breakpoints in Module.

-spec snapshot() -> [Snapshot]
                  when
                      Snapshot :: {Pid, Function, Status, Info},
                      Pid :: pid(),
                      Function :: {Module, Name, Args},
                      Module :: module(),
                      Name :: atom(),
                      Args :: [term()],
                      Status :: idle | running | waiting | break | exit | no_conn,
                      Info :: {} | {Module, Line} | ExitReason,
                      Line :: integer(),
                      ExitReason :: term().

Gets information about all processes executing interpreted code.

• Pid - Process identifier.
• Function - First interpreted function called by the process.
• Status - Current status of the process.
• Info - More information.

Status is one of the following:

• idle - The process is no longer executing interpreted code. Info is {}.
• running - The process is running. Info is {}.
• waiting - The process is waiting at a receive. Info is {}.
• break - Process execution is stopped, normally at a breakpoint. Info is {Module,Line}.
• exit - The process is terminated. Info is ExitReason.
• no_conn - The connection is down to the node where the process is running. Info is {}.

-spec stack_trace() -> Flag when Flag :: all | no_tail | false.

Gets how to save call frames in the stack.

See stack_trace/1 for the meaning of Flag.

-spec stack_trace(Flag) -> term() when Flag :: all | no_tail | false.

Sets how to save call frames in the stack.

Saving call frames makes it possible to inspect the call chain of a process, and is also used to emulate the stack trace if an error (an exception of class error) occurs. The following flags can be specified:

• all - Save information about all current calls, that is, function calls that have not yet returned a value.

• no_tail - Save information about current calls, but discard previous information when a tail-recursive call is made. This option consumes less memory and can be necessary to use for processes with long lifetimes and many tail-recursive calls. This is the default.

• false - Save no information about current calls.

-spec test_at_break(Module, Line, Function) -> ok
                       when
                           Module :: module(),
                           Line :: integer(),
                           Function :: {Module, Name},
                           Name :: atom().

Sets the conditional test of the breakpoint at Line in Module to Function.

Function Function must fulfill the requirements specified in section Breakpoints.