Commit Graph

27 Commits

Author SHA1 Message Date
Martin v. Löwis 73c01d4101 Added checks for integer overflows, contributed by Google. Some are
only available if asserts are left in the code, in cases where they
can't be triggered from Python code.
2008-02-14 11:26:18 +00:00
Andrew M. Kuchling 12ca69bc0e Fix comment typo 2006-06-06 17:10:41 +00:00
Neal Norwitz 2c4e4f9839 SF patch #1467512, fix double free with triple quoted string in standard build.
This was the result of inconsistent use of PyMem_* and PyObject_* allocators.
By changing to use PyObject_* allocator almost everywhere, this removes
the inconsistency.
2006-04-10 06:42:25 +00:00
Martin v. Löwis 49c5da1d88 Patch #1440601: Add col_offset attribute to AST nodes. 2006-03-01 22:49:05 +00:00
Andrew MacIntyre 80d4e2acf5 SF patch #578297:
Change the parser and compiler to use PyMalloc.

Only the files implementing processes that will request memory
allocations small enough for PyMalloc to be a win have been
changed, which are:-
 - Python/compile.c
 - Parser/acceler.c
 - Parser/node.c
 - Parser/parsetok.c

This augments the aggressive overallocation strategy implemented by
Tim Peters in PyNode_AddChild() [Parser/node.c], in reducing the
impact of platform malloc()/realloc()/free() corner case behaviour.
Such corner cases are known to be triggered by test_longexp and
test_import.

Jeremy Hylton, in accepting this patch, recommended this as a
bugfix candidate for 2.2.  While the changes to Python/compile.c
and Parser/node.c backport easily (and could go in), the changes
to Parser/acceler.c and Parser/parsetok.c require other not
insignificant changes as a result of the differences in the memory
APIs between 2.3 and 2.2, which I'm not in a position to work
through at the moment.  This is a pity, as the Parser/parsetok.c
changes are the most important after the Parser/node.c changes, due
to the size of the memory requests involved and their frequency.
2002-08-04 06:28:21 +00:00
Tim Peters e561dc231e XXXROUNDUP(): Turns out this fixed Andrew MacIntyre's memory-mgmt
disaster too, so this change is here to stay.  Beefed up the comments
and added some stats Andrew reported.  Also a small change to the
macro body, to make it obvious how XXXROUNDUP(0) ends up returning 0.
See SF patch 578297 for context.

Not a bugfix candidate, as the functional changes here have already
been backported to the 2.2 line (this patch just improves clarity).
2002-07-15 17:58:03 +00:00
Tim Peters 623fdb9884 PyNode_AddChild() and fancy_roundup(): Be paranoid about int overflow. 2002-07-08 19:11:07 +00:00
Tim Peters 755ebea23b PyNode_AddChild(): Do aggressive over-allocation when the number of
children gets large, to avoid severe platform realloc() degeneration
in extreme cases (like test_longexp).

Bugfix candidate.

This was doing extremely timid over-allocation, just rounding up to the
nearest multiple of 3.  Now so long as the number of children is <= 128,
it rounds up to a multiple of 4 but via a much faster method.  When the
number of children exceeds 128, though, and more space is needed, it
doubles the capacity.  This is aggressive over-allocation.

SF patch <http://www.python.org/sf/578297> has Andrew MacIntyre using
PyMalloc in the parser to overcome platform malloc problems in
test_longexp on OS/2 EMX.  Jack Jansen notes there that it didn't help
him on the Mac, because the Mac has problems with frequent ever-growing
reallocs, not just with gazillions of teensy mallocs.  Win98 has no
visible problems with test_longexp, but I tried boosting the test-case
size and soon got "senseless" MemoryErrors out of it, and soon after
crashed the OS:  as I've seen in many other contexts before, while the
Win98 realloc remains zippy in bad cases, it leads to extreme
fragmentation of user address space, to the point that the OS barfs.

I don't yet know whether this fixes Jack's Mac problems, but it does cure
Win98's problems when boosting the test case size.  It also speeds
test_longexp in its unaltered state.
2002-07-08 06:32:09 +00:00
Tim Peters 1d6a7297d3 More limits.h stuff in node.c.
Fred, check this!
2000-09-26 06:11:54 +00:00
Vladimir Marangozov 58e64a82ee Move down the INT_MAX logic, because HAVE_LIMITS_H was always undefined
and this breaks the AIX build with an INT_MAX redefinition error.
"config.h" is included in pgenheaders.h, so moving this down fixes the
problem.
2000-09-03 23:47:08 +00:00
Guido van Rossum 8586991099 REMOVED all CWI, CNRI and BeOpen copyright markings.
This should match the situation in the 1.6b1 tree.
2000-09-01 23:29:29 +00:00
Fred Drake ef8ace3a6f Charles G. Waldman <cgw@fnal.gov>:
Add the EXTENDED_ARG opcode to the virtual machine, allowing 32-bit
arguments to opcodes instead of being forced to stick to the 16-bit
limit.  This is especially useful for machine-generated code, which
can be too long for the SET_LINENO parameter to fit into 16 bits.

This closes the implementation portion of SourceForge patch #100893.
2000-08-24 00:32:09 +00:00
Thomas Wouters 23c9e0024a Mass ANSIfication.
Work around intrcheck.c's desire to pass 'PyErr_CheckSignals' to
'Py_AddPendingCall' by providing a (static) wrapper function that has the
right number of arguments.
2000-07-22 19:20:54 +00:00
Tim Peters dbd9ba6a6c Nuke all remaining occurrences of Py_PROTO and Py_FPROTO. 2000-07-09 03:09:57 +00:00
Guido van Rossum ffcc3813d8 Change copyright notice - 2nd try. 2000-06-30 23:58:06 +00:00
Guido van Rossum fd71b9e9d4 Change copyright notice. 2000-06-30 23:50:40 +00:00
Jeremy Hylton 94988067b9 Add new parser error code, E_OVERFLOW. This error is returned when
the number of children of a node exceeds the max possible value for
the short that is used to count them.  The Python runtime converts
this parser error into the SyntaxError "expression too long."
2000-06-20 19:10:44 +00:00
Guido van Rossum 86bea46b3d Another directory quickly renamed. 1997-04-29 21:03:06 +00:00
Guido van Rossum d266eb460e New permission notice, includes CNRI. 1996-10-25 14:44:06 +00:00
Guido van Rossum b9f8d6e54d Added 1995 to copyright message. 1995-01-04 19:08:09 +00:00
Guido van Rossum 1d5735e846 Merge back to main trunk 1994-08-30 08:27:36 +00:00
Guido van Rossum 9bfef44d97 * Changed all copyright messages to include 1993.
* Stubs for faster implementation of local variables (not yet finished)
* Added function name to code object.  Print it for code and function
  objects.  THIS MAKES THE .PYC FILE FORMAT INCOMPATIBLE (the version
  number has changed accordingly)
* Print address of self for built-in methods
* New internal functions getattro and setattro (getattr/setattr with
  string object arg)
* Replaced "dictobject" with more powerful "mappingobject"
* New per-type functio tp_hash to implement arbitrary object hashing,
  and hashobject() to interface to it
* Added built-in functions hash(v) and hasattr(v, 'name')
* classobject: made some functions static that accidentally weren't;
  added __hash__ special instance method to implement hash()
* Added proper comparison for built-in methods and functions
1993-03-29 10:43:31 +00:00
Guido van Rossum bab9d03855 Copyright for 1992 added 1992-04-05 14:26:55 +00:00
Guido van Rossum f70e43a073 Added copyright notice. 1991-02-19 12:39:46 +00:00
Guido van Rossum 3f5da24ea3 "Compiling" version 1990-12-20 15:06:42 +00:00
Guido van Rossum 03a24cd47b Add function to free an entire parse tree. 1990-11-18 17:37:06 +00:00
Guido van Rossum 85a5fbbdfe Initial revision 1990-10-14 12:07:46 +00:00