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46 commits

Author SHA1 Message Date
Maria Matejka
2e5bfeb73a Merge remote-tracking branch 'origin/master' into backport 2022-07-11 11:08:10 +02:00
Ondrej Zajicek (work)
a2527ee53d Filter: Improve handling of stack frames in filter bytecode 
When f_line is done, we have to pop the stack frame. The old code just
removed nominal number of args/vars. Change it to use stored ventry value
modified by number of returned values. This allows to allocate variables
on a stack frame during execution of f_lines instead of just at start.

But we need to know the number of returned values for a f_line. It is 1
for term, 0 for cmd. Store that to f_line during linearization.
 2022-06-27 21:13:32 +02:00
Ondrej Zajicek (work)
26bc4f9904 Filter: Implement direct recursion 
Direct recursion almost worked, just crashed on function signature check.
Split function parsing such that function signature is saved before
function body is processed. Recursive calls are marked so they can be
avoided during f_same() and similar code walking.

Also, include tower of hanoi solver as a test case.
 2022-06-27 21:13:31 +02:00
Ondrej Zajicek (work)
fb1d8f6513 Filter: Apply constant promotion for FI_EQ / FI_NEQ 
Equality comparison is defined on all values, even of different
types, but we still want to do constant promotion if possible.
 2022-06-27 21:13:31 +02:00
Alexander Zubkov
b2d6d2948a Filter: Add literal for empty set 
Add literal for empty set [], which works both for tree-based sets
and prefix sets by using existing constant promotion mechanism.

Minor changes by committer.
 2022-06-27 21:13:31 +02:00
Ondrej Zajicek (work)
9b302c133f Filter: Ensure that all expressions declared return type 
All instructions with a return value (i.e. expressions, ones with
non-zero outval, third argument in INST()) should declare their return
type. Check that automatically by M4 macros.

Set outval of FI_RETURN to 0. The instruction adds one value to stack,
but syntactically it is a statement, not an expression.

Add fake return type declaration to FI_CALL, otherwise the automatic
check would fail builds.
 2022-06-27 21:13:31 +02:00
Maria Matejka
2c13759136 Reducing filter stack size to allow for lesser thread stack size 2021-09-10 18:11:28 +02:00
Maria Matejka
eb20251655 Filter: Additional consistency checks 2021-09-10 17:37:46 +02:00
Ondrej Zajicek (work)
d06a875b04 Filter: Recursive filter iteration code 
Add macros for recursive filter iteration that allows to examine
all instructions reachable from a filter.
 2021-02-07 19:21:42 +01:00
Maria Matejka
d65a926a67 Filter: Don't alloc varargs array if its length would be zero 2020-05-01 15:19:12 +02:00
Ondrej Zajicek (work)
ef8c45749c Filter: Fix typecheck for AND/OR. 
Do not apply dynamic type check for second argument of AND/OR, as it is
not evaluated immediately like regular argument would be.

Thanks to Mikael for the bugreport.
 2020-01-07 01:24:30 +01:00
Ondrej Zajicek (work)
87512e9751 Filter: Improve typecheck error messages 2019-11-05 15:30:16 +01:00
Ondrej Zajicek (work)
c00c20a799 Filter: Better constant promotion 
We use constant promotion from IPv4 to Router-ID values, as they have
same literals. Instead of ad-hoc code in filter instructions, add
constant promotion code to parse-time typecheck code.
 2019-11-05 15:28:47 +01:00
Ondrej Zajicek (work)
26194bd684 Filter: Improved parse-time typechecks 2019-11-05 15:28:47 +01:00
Ondrej Zajicek
6fbcd8914a Filter: Parse-time typechecks 
Most expressions can be type-validated in parse time. It is not
strong enough to eliminate runtime checks, but at least one gets
errors immediately during reconfigure.
 2019-11-05 15:28:47 +01:00
Maria Matejka
f634adc7dc Filter: FID_MEMBER debug string is a C constant string 2019-07-15 15:17:04 +02:00
Maria Matejka
c0999a149c Filter: Converted FI_PRINT and FI_PATHMASK_CONSTRUCT to VARARG 2019-07-15 15:12:18 +02:00
Maria Matejka
547be53b8c Filter: Don't fail badly when trying to access non-existent route in config time 2019-07-15 12:03:13 +02:00
Maria Matejka
8816b6cdd9 Merge branch 'mq-filter-stack' of gitlab.labs.nic.cz:labs/bird into mq-filter-stack 2019-07-03 08:44:42 +02:00
Maria Matejka
0206c070ac Filter: Split printing and dying 2019-07-03 08:27:56 +02:00
Maria Matejka
263fa2c4a6 Filter: Dropped some more irrelevant whitespace from generated files 2019-07-02 22:57:00 +02:00
Maria Matejka
84c58aabd0 Filter: Nicer whitespaces in generated inst-gen.h 2019-07-02 17:59:21 +02:00
Maria Matejka
550a6488c9 Filter: documentation of the M4 preprocessor 2019-07-02 17:39:56 +02:00
Maria Matejka
c376555cec Filter: GCC, don't complain about indentation in generated code. 2019-07-02 13:13:29 +02:00
Maria Matejka
b40c0f028f Filter: Pre-evaluation of constant expressions 2019-07-02 10:45:53 +02:00
Maria Matejka
26bfe59f45 Filter: Moved singleton member definitions to f-inst.c 2019-07-01 13:13:06 +02:00
Maria Matejka
4212c0e7e5 Filter: Moved f_inst allocation to separate function 2019-07-01 12:49:02 +02:00
Maria Matejka
f74d19765e Filter: Getting rid of RESULT_OK. Adding RESULT_VOID. 
This is a preparation for filter pre-evaluation.
 2019-07-01 12:07:06 +02:00
Maria Matejka
236828d06f Filter: The interpreter code now shares its diversion with constructor 
This is a preparation for filter pre-evaluation.
 2019-07-01 11:57:35 +02:00
Maria Matejka
63f49457dc Filter: renaming pointers for consistency 
The struct f_inst * is now always "what"
and the union member pointer is always "whati".
 2019-06-28 11:26:36 +02:00
Maria Matejka
64bb1346c7 Filter: A little cleanup of M4 interpreter generator 2019-06-27 23:57:59 +02:00
Maria Matejka
a84b8b6ebb Revert "Filter: Dropped the setter instructions in favor of direct result storage." 
This reverts commit bd91338246.
 2019-06-19 14:09:57 +02:00
Maria Matejka
bd91338246 Filter: Dropped the setter instructions in favor of direct result storage. 
This should help filter performance a bit.
 2019-06-03 10:41:35 +02:00
Maria Matejka
1757a6fce5 Filter: Stacks moved to thread-local storage if available. 2019-05-29 21:03:52 +02:00
Jan Maria Matejka
23e3b1e665 Filter: Some people can't pronounce "postfixify" correctly. Let's try "linearize" instead. 
This is just a naming change.
 2019-05-22 15:20:02 +00:00
Jan Maria Matejka
96d757c13f Filter: Store variables and function arguments on stack 2019-05-21 16:33:37 +00:00
Maria Matejka
d1039926f5 Filter: Interpreter merged into the common m4 generator. 
The config-time partial evaluation of constant expressions in filters is nearby.
 2019-02-20 22:30:55 +01:00
Maria Matejka
ea4f55e3dc Filter: More cleanup -- customized structures also in struct f_line_item 2019-02-20 22:30:55 +01:00
Maria Matejka
0b39b1cbb7 Conf: Symbol implementation converted from void pointers to union 
... and consted some declarations.
 2019-02-20 22:30:55 +01:00
Maria Matejka
132529ce89 Filter: merged filter compare functions into common M4 file 2019-02-20 22:30:55 +01:00
Maria Matejka
dd4d409551 Filter: Merged postfixify routine 2019-02-20 22:30:54 +01:00
Maria Matejka
de12cd18fb Filter: Merged filter line item dumpers into common generated source 2019-02-20 22:30:54 +01:00
Maria Matejka
b256f24145 Filter: auto-generating enum-to-string 2019-02-20 22:30:54 +01:00
Maria Matejka
041608129a Filter generator: workaround for M4 claiming all the put-around code be on one line 2019-02-20 22:30:54 +01:00
Maria Matejka
87bd7cd7b0 Filter: split the constructors to a separate file 2019-02-20 22:30:54 +01:00
Maria Matejka
4f082dfa89 Filter: merged filter instruction constructors, counting line size on instruction construct 2019-02-20 22:30:54 +01:00