Commit Graph

28 Commits

Author SHA1 Message Date
Damien George
1831034be1 py: Allow lexer to raise exceptions during construction.
This patch refactors the error handling in the lexer, to simplify it (ie
reduce code size).

A long time ago, when the lexer/parser/compiler were first written, the
lexer and parser were designed so they didn't use exceptions (ie nlr) to
report errors but rather returned an error code.  Over time that has
gradually changed, the parser in particular has more and more ways of
raising exceptions.  Also, the lexer never really handled all errors without
raising, eg there were some memory errors which could raise an exception
(and in these rare cases one would get a fatal nlr-not-handled fault).

This patch accepts the fact that the lexer can raise exceptions in some
cases and allows it to raise exceptions to handle all its errors, which are
for the most part just out-of-memory errors during construction of the
lexer.  This makes the lexer a bit simpler, and also the persistent code
stuff is simplified.

What this means for users of the lexer is that calls to it must be wrapped
in a nlr handler.  But all uses of the lexer already have such an nlr
handler for the parser (and compiler) so that doesn't put any extra burden
on the callers.
2017-03-14 11:52:05 +11:00
Damien George
7d0d7215d2 py: Use mp_raise_msg helper function where appropriate.
Saves the following number of bytes of code space: 176 for bare-arm, 352
for minimal, 272 for unix x86-64, 140 for stmhal, 120 for esp8266.
2016-10-17 12:17:37 +11:00
Damien George
4b72b3a133 py: Change type signature of builtin funs that take variable or kw args.
With this patch the n_args parameter is changed type from mp_uint_t to
size_t.
2016-01-11 00:49:27 +00:00
Damien George
dd5353a405 py: Add MICROPY_ENABLE_COMPILER and MICROPY_PY_BUILTINS_EVAL_EXEC opts.
MICROPY_ENABLE_COMPILER can be used to enable/disable the entire compiler,
which is useful when only loading of pre-compiled bytecode is supported.
It is enabled by default.

MICROPY_PY_BUILTINS_EVAL_EXEC controls support of eval and exec builtin
functions.  By default they are only included if MICROPY_ENABLE_COMPILER
is enabled.

Disabling both options saves about 40k of code size on 32-bit x86.
2015-12-18 12:35:44 +00:00
Damien George
999cedb90f py: Wrap all obj-ptr conversions in MP_OBJ_TO_PTR/MP_OBJ_FROM_PTR.
This allows the mp_obj_t type to be configured to something other than a
pointer-sized primitive type.

This patch also includes additional changes to allow the code to compile
when sizeof(mp_uint_t) != sizeof(void*), such as using size_t instead of
mp_uint_t, and various casts.
2015-11-29 14:25:35 +00:00
Damien George
0868942e77 py: Check for valid file when creating lexer for execfile.
Addresses issue #1119.
2015-02-15 00:02:27 +00:00
Damien George
ff8dd3f486 py, unix: Allow to compile with -Wunused-parameter.
See issue #699.
2015-01-20 12:47:20 +00:00
Damien George
51dfcb4bb7 py: Move to guarded includes, everywhere in py/ core.
Addresses issue #1022.
2015-01-01 20:32:09 +00:00
Damien George
2a3e2b9033 py: Add execfile function (from Python 2); enable in stmhal port.
Adds just 60 bytes to stmhal binary.  Addresses issue #362.
2014-12-19 13:36:17 +00:00
Damien George
c9fc620723 py: Implement compile builtin, enabled only on unix port.
This should be pretty compliant with CPython, except perhaps for some
corner cases to do with globals/locals context.

Addresses issue #879.
2014-10-25 22:07:25 +01:00
Damien George
c4d0868df1 py: Implement proper context save/restore for eval/exec; factor code.
This has benefits all round: code factoring for parse/compile/execute,
proper context save/restore for exec, allow to sepcify globals/locals
for eval, and reduced ROM usage by >100 bytes on stmhal and unix.

Also, the call to mp_parse_compile_execute is tail call optimised for
the import code, so it doesn't increase stack memory usage.
2014-10-05 20:13:34 +01:00
Damien George
a91ac2011f py: Make compiler return a proper exception on SyntaxError. 2014-10-05 19:01:34 +01:00
Damien George
52b5d76a6b py: Free non-interned strings in the parser when not needed.
mp_parse_node_free now frees the memory associated with non-interned
strings.  And the parser calls mp_parse_node_free when discarding a
non-used node (such as a doc string).

Also, the compiler now frees the parse tree explicitly just before it
exits (as opposed to relying on the caller to do this).

Addresses issue #708 as best we can.
2014-09-23 15:31:56 +00:00
Damien George
d182b98a37 py: Change all uint to mp_uint_t in obj.h.
Part of code cleanup, working towards resolving issue #50.
2014-08-30 14:19:41 +01:00
Damien George
04b9147e15 Add license header to (almost) all files.
Blanket wide to all .c and .h files.  Some files originating from ST are
difficult to deal with (license wise) so it was left out of those.

Also merged modpyb.h, modos.h, modstm.h and modtime.h in stmhal/.
2014-05-03 23:27:38 +01:00
Paul Sokolovsky
f54bcbf099 py, unix: Make "mpconfig.h" be first included, as other headers depend on it.
Specifically, nlr.h does.
2014-05-02 17:48:40 +03:00
Damien George
4b01de44ba py: Add traceback info to syntax errors.
Should fix issue #463.
2014-04-13 11:56:02 +01:00
Damien George
65cad12d38 py: Add option to compiler to specify default code emitter.
Also add command line option to unix port to select emitter.
2014-04-06 11:48:15 +01:00
Damien George
7efc5b3f34 py: Make globals and locals proper dictionary objects.
Finishes addressing issue #424.

In the end this was a very neat refactor that now makes things a lot
more consistent across the py code base.  It allowed some
simplifications in certain places, now that everything is a dict object.

Also converted builtins tables to dictionaries.  This will be useful
when we need to turn builtins into a proper module.
2014-04-05 22:36:42 +01:00
Damien George
ea13f407a3 py: Change nlr_jump to nlr_raise, to aid in debugging.
This does not affect code size or performance when debugging turned off.

To address issue #420.
2014-04-05 18:32:08 +01:00
Damien George
df6567e634 Merge map.h into obj.h.
Pretty much everyone needs to include map.h, since it's such an integral
part of the Micro Python object implementation.  Thus, the definitions
are now in obj.h instead.  map.h is removed.
2014-03-30 13:54:02 +01:00
Damien George
d17926db71 Rename rt_* to mp_*.
Mostly just a global search and replace.  Except rt_is_true which
becomes mp_obj_is_true.

Still would like to tidy up some of the names, but this will do for now.
2014-03-30 13:35:08 +01:00
xbe
efe3422394 py: Clean up includes.
Remove unnecessary includes. Add includes that improve portability.
2014-03-17 02:43:40 -07:00
Damien George
c5966128c7 Implement proper exception type hierarchy.
Each built-in exception is now a type, with base type BaseException.
C exceptions are created by passing a pointer to the exception type to
make an instance of.  When raising an exception from the VM, an
instance is created automatically if an exception type is raised (as
opposed to an exception instance).

Exception matching (RT_BINARY_OP_EXCEPTION_MATCH) is now proper.

Handling of parse error changed to match new exceptions.

mp_const_type renamed to mp_type_type for consistency.
2014-02-15 16:10:44 +00:00
Paul Sokolovsky
2aa217b974 Implement full arg handling for exec(). 2014-02-13 00:36:54 +02:00
Paul Sokolovsky
520e2f58a5 Replace global "static" -> "STATIC", to allow "analysis builds". Part 2. 2014-02-12 18:31:30 +02:00
Damien George
698ec21e46 Make mp_obj_str_get_data return char* instead of byte*.
Can't decide which is better for string type, char or byte pointer.
Changing to char removes a few casts.  Really need to do proper unicode.
2014-02-08 18:17:23 +00:00
Damien George
ca4767984b py: Implement builtin exec. 2014-02-03 22:44:10 +00:00