suspect-devices/circuitpython/py/parse.c, branch v1.8.6CircuitPython - a Python implementation for teaching coding with microcontrollershttps://git.suspectdevices.com/suspect-devices/circuitpython/atom?h=v1.8.62016-11-02T12:15:41+00:00py: Fix wrong assumption that m_renew will not move if shrinking2016-11-02T12:15:41+00:00Colin Hogbencolin@infinnovation.co.uk2016-10-31T14:05:56+00:00urn:sha1:f9b6b37cf65c4f65c4ad461d439fbf624c0f10c1
In both parse.c and qstr.c, an internal chunking allocator tidies up
by calling m_renew to shrink an allocated chunk to the size used, and
assumes that the chunk will not move. However, when MICROPY_ENABLE_GC
is false, m_renew calls the system realloc, which does not guarantee
this behaviour. Environments where realloc may return a different
pointer include:
(1) mbed-os with MBED_HEAP_STATS_ENABLED (which adds a wrapper around
malloc & friends; this is where I was hit by the bug);
(2) valgrind on linux (how I diagnosed it).
The fix is to call m_renew_maybe with allow_move=false.
py/parse: Only replace constants that are standalone identifiers.2016-09-23T07:23:16+00:00Damien Georgedamien.p.george@gmail.com2016-09-23T07:23:16+00:00urn:sha1:6d310a5552f43b3f984a5d8020b41301ab7937a4
This fixes constant substitution so that only standalone identifiers are
replaced with their constant value (if they have one). I.e. don't
replace NAME in expressions like obj.NAME or NAME = expr.
py/parse: Treat constants that start with underscore as private.2016-06-06T16:28:32+00:00Damien Georgedamien.p.george@gmail.com2016-06-06T16:28:32+00:00urn:sha1:b1533c43669c037d04c87d1756355cdc8edd5e0a
Assignments of the form "_id = const(value)" are treated as private
(following a similar CPython convention) and code is no longer emitted
for the assignment to a global variable.
See issue #2111.
py: Declare constant data as properly constant.2016-05-20T11:46:20+00:00Damien Georgedamien.p.george@gmail.com2016-05-20T11:38:15+00:00urn:sha1:3ff16ff52e45d4c0bf1df5fa650b72d6d835451b
Otherwise some compilers (eg without optimisation) will put this read-only
data in RAM instead of ROM.
py/parse: Add uerrno to list of modules to look for constants in.2016-05-10T22:30:39+00:00Damien Georgedamien.p.george@gmail.com2016-05-10T22:23:50+00:00urn:sha1:e36ff98c80aa93a2f9fdd05800aaa6e75ead2b72py: Simplify "and" action within parser by making ident-rules explicit.2016-04-14T12:49:23+00:00Damien Georgedamien.p.george@gmail.com2016-04-14T12:23:50+00:00urn:sha1:0c1de1cdeea98e55710d27f7926da717086ac0fc
Most grammar rules can optimise to the identity if they only have a single
argument, saving a lot of RAM building the parse tree. Previous to this
patch, whether a given grammar rule could be optimised was defined (mostly
implicitly) by a complicated set of logic rules. With this patch the
definition is always specified explicitly by using "and_ident" in the rule
definition in the grammar. This simplifies the logic of the parser,
making it a bit smaller and faster. RAM usage in unaffected.
py: Fix constant folding and inline-asm to work with new async grammar.2016-04-13T14:26:39+00:00Damien Georgedamien.p.george@gmail.com2016-04-13T14:21:47+00:00urn:sha1:eacbd7aeba3bdd634b56af544e40da87779f4a95py/parse: When looking up consts, check they exist before checking type.2016-03-19T21:36:32+00:00Damien Georgedamien.p.george@gmail.com2016-03-19T21:36:32+00:00urn:sha1:8d4d6731f56f9b1163f19d2455e8998aa0499afdpy/parse: Use m_renew_maybe to ensure that memory is shrunk in-place.2016-02-23T13:44:29+00:00Damien Georgedamien.p.george@gmail.com2016-02-23T13:44:29+00:00urn:sha1:d6c558c0aae53d3cd5f8871394f44bd23836307e
The chunks of memory that the parser allocates contain parse nodes and
are pointed to from many places, so these chunks cannot be relocated
by the memory manager. This patch makes it so that when a chunk is
shrunk to fit, it is not relocated.
py: unary_op enum type fix, and a cast to remove clang warning2016-01-12T21:06:39+00:00Antonin ENFRUNantonin.e@me.com2016-01-12T21:06:39+00:00urn:sha1:efc971e8f9b69bbab32d5677239f2dfb16e8f3be