mirror of
https://github.com/idris-lang/Idris2.git
synced 2024-12-25 04:33:45 +03:00
108 lines
3.0 KiB
ReStructuredText
108 lines
3.0 KiB
ReStructuredText
**********************
|
|
Debugging The Compiler
|
|
**********************
|
|
|
|
Performance
|
|
===========
|
|
|
|
The compiler has the ``--timing`` flag to dump timing information collected during operation.
|
|
|
|
The output documents, in reverse chronological order, the cumulative time taken for the operation (and sub operations) to complete.
|
|
Sub levels are indicated by successive repetitions of ``+``.
|
|
|
|
.. _sect-logging:
|
|
|
|
Logging
|
|
=======
|
|
|
|
The compiler logs various categories of information during operation at various levels.
|
|
|
|
Log levels are characterised by two things:
|
|
|
|
+ a dot-separated path of ever finer topics of interest e.g. scope.let
|
|
+ a natural number corresponding to the verbosity level e.g. 5
|
|
|
|
If the user asks for some logs by writing::
|
|
|
|
%logging "scope" 5
|
|
|
|
they will get all of the logs whose path starts with `scope` and whose
|
|
verbosity level is less or equal to `5`. By combining different logging
|
|
directives, users can request information about everything (with a low
|
|
level of details) and at the same time focus on a particular subsystem
|
|
they want to get a lot of information about. For instance:::
|
|
|
|
%logging 1
|
|
%logging "scope.let" 10
|
|
|
|
will deliver basic information about the various phases the compiler goes
|
|
through and deliver a lot of information about scope-checking let binders.
|
|
|
|
|
|
You can set the logging level at the command line using::
|
|
|
|
--log <level>
|
|
|
|
and through the REPL using::
|
|
|
|
:log <string category> <level>
|
|
|
|
:logging <string category> <level>
|
|
|
|
The supported logging categories can be found using the command line flag::
|
|
|
|
--help logging
|
|
|
|
REPL Commands
|
|
=============
|
|
|
|
To see more debug information from the REPL there are several options one can set.
|
|
|
|
.. csv-table:: Logging Categories
|
|
:header: "command", "description"
|
|
:widths: 20, 20
|
|
|
|
``:di <name>``, show debugging information for a name
|
|
``:set showimplicits``, show values of implicit arguments
|
|
|
|
Compiler Flags
|
|
==============
|
|
|
|
There are several 'hidden' compiler flags that can help expose Idris' inner workings.
|
|
|
|
.. csv-table:: Logging Categories
|
|
:header: "command", "description"
|
|
:widths: 20, 20
|
|
|
|
``--dumpcases <file>``, dump case trees to the given file
|
|
``--dumplifted <file>``, dump lambda lifted trees to the given file
|
|
``--dumpanf <file>``, dump ANF to the given file
|
|
``--dumpvmcode <file>``, dump VM Code to the given file
|
|
``--debug-elab-check``, do more elaborator checks (currently conversion in LinearCheck)
|
|
|
|
|
|
Output Formats
|
|
==============
|
|
|
|
Debug Output
|
|
------------
|
|
|
|
Calling ``:di <name>`` dumps debugging information about the selected term.
|
|
Specifically dumped are:
|
|
|
|
.. csv-table:: Debugging Information
|
|
:header: "topic", "description"
|
|
:widths: 20, 20
|
|
|
|
Full Name(s), The fully qualified name of the term.
|
|
Multiplicity, The terms multiplicity.
|
|
Erasable Arguments, Things that are erased.
|
|
Detaggable argument types,
|
|
Specialised arguments,
|
|
Inferrable arguments,
|
|
Compiled version,
|
|
Compile time linked terms,
|
|
Runtime linked terms,
|
|
Flags,
|
|
Size change graph,
|