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118 Commits

Author SHA1 Message Date
Roberto Ierusalimschy
152b51955a Removed GC checks from function calls 
Function calls do not create new objects. (It may use memory with
stack reallocation, but now that is irrelevant to the GC.)
 2022-11-24 10:20:15 -03:00
Roberto Ierusalimschy
413a393e62 Stack indices changed to union's 
That will allow to change pointers to offsets while reallocating
the stack.
 2022-10-29 12:06:37 -03:00
Roberto Ierusalimschy
d61b0c6028 More checks and documentation for uses of EXTRA_STACK 2022-05-26 15:14:54 -03:00
Roberto Ierusalimschy
e435aaabef Details (identation and typos) 2022-05-10 11:13:39 -03:00
Roberto Ierusalimschy
1fce5bea81 More uniform implementation for tail calls 
'luaD_pretailcall' mimics 'luaD_precall', handling call metamethods
and calling C functions directly. That makes the code in the
interpreter loop simpler.

This commit also goes back to emulating the tail call in 'luaD_precall'
with a goto, as C compilers may not do proper tail calls and the C
stack can overflow much sooner than the Lua stack (which grows as the
metamethod is added to it).
 2021-10-29 13:41:24 -03:00
Roberto Ierusalimschy
91673a8ec0 'luaD_tryfuncTM' checks stack space by itself 2021-08-18 12:05:06 -03:00
Roberto Ierusalimschy
41871f1803 Undo simplification of tail calls (commit 901d760) 
Not that simpler and slower.
 2021-08-18 11:21:33 -03:00
Roberto Ierusalimschy
dbdc74dc55 Simplification in the parameters of 'luaD_precall' 
The parameters 'nresults' and 'delta1', in 'luaD_precall', were never
meaningful simultaneously. So, they were combined in a single parameter
'retdel'.
 2021-06-30 12:53:21 -03:00
Roberto Ierusalimschy
901d760093 Simpler implementation for tail calls 
Tail calls handled by 'luaD_precall', like regular calls, to avoid
code duplication.
 2021-06-11 13:41:07 -03:00
Roberto Ierusalimschy
59c88f846d Broadening the use of branch hints 
More uses of macros 'likely'/'unlikely' (renamed to
'l_likely'/'l_unlikely'), both in range (extended to the
libraries) and in scope (extended to hooks, stack growth).
 2021-02-24 11:14:44 -03:00
Roberto Ierusalimschy
7af27ef59d Cleaner handling of errors in '__close' metamethods 
Instead of protecting each individual metamethod call, protect the
entire call to 'luaF_close'.
 2020-12-28 11:40:30 -03:00
Roberto Ierusalimschy
490d42b5f8 Correct handling of 'luaV_execute' invocations 
The previous stackless implementations marked all 'luaV_execute'
invocations as fresh. However, re-entering 'luaV_execute' when
resuming a coroutine should not be a fresh invocation. (It works
because 'unroll' called 'luaV_execute' for each call entry, but
it was slower than letting 'luaV_execute' finish all non-fresh
invocations.)
 2020-10-12 12:29:09 -03:00
Roberto Ierusalimschy
5d8ce05b3f Back to a stackless implementation 
A "with stack" implementation gains too little in performance to be
worth all the noise from C-stack overflows.

This commit is almost a sketch, to test performance. There are several
pending stuff:

- review control of C-stack overflow and error messages;
- what to do with setcstacklimit;
- review comments;
- review unroll of Lua calls.
 2020-10-12 12:29:09 -03:00
Roberto Ierusalimschy
eb41999461 Fixed bugs of stack reallocation x GC 
Macro 'checkstackGC' was doing a GC step after resizing the stack;
the GC could shrink the stack and undo the resize. Moreover, macro
'checkstackp' also does a GC step, which could remove the preallocated
CallInfo when calling a function. (Its name has been changed to
'checkstackGCp' to emphasize that it calls the GC.)
 2020-07-07 18:03:48 -03:00
Roberto Ierusalimschy
bd96330d03 First "complete" implementation of to-be-closed variables 
Still missing:
- handling of memory errors when creating upvalue (must run closing
method all the same)
- interaction with coroutines
 2018-10-17 10:44:42 -03:00
Roberto Ierusalimschy
f99509581e Removed extra information from RCS keyword strings 
Version numbers and dates (mostly wrong) from RCS keyword strings
removed from all source files; only the file name are kept.
 2018-08-23 14:26:12 -03:00
Roberto Ierusalimschy
02ed0b2c30 in 'luaD_poscall', there is no need to compute 'firstResult' when 'nres==0' 2018-05-22 09:02:36 -03:00
Roberto Ierusalimschy
422318f677 two new fields 'fTransfer'/'nTransfer' in 'lua_Debug' structure 
(for information about values being given and returned in function calls)
 2018-02-17 17:29:29 -02:00
Roberto Ierusalimschy
0682fe8169 some simplifications/optimizations in returns from Lua functions 2018-02-15 13:34:29 -02:00
Roberto Ierusalimschy
b1379936cf vararg back to '...' (but with another implementation) 
new implementation should have zero overhead for non-vararg functions
 2018-02-09 13:16:06 -02:00
Roberto Ierusalimschy
51280ef2ad call hooks for Lua functions called by 'luaV_execute' 2018-02-06 17:16:56 -02:00
Roberto Ierusalimschy
ab0a851db4 'luaD_tryfuncTM' can ensure it does not change the stack 2018-01-10 17:19:27 -02:00
Roberto Ierusalimschy
bfb88e99e9 'luaD_growstack' cannot raise any errors when 'raiseerror' is 
false (+ some comments)
 2017-12-11 10:43:40 -02:00
Roberto Ierusalimschy
e663a24ab0 more freedom in handling memory-allocation errors (not all allocations 
automatically raise an error), which allows fixing a bug when resizing
a table.
 2017-12-08 15:28:25 -02:00
Roberto Ierusalimschy
194a4f9710 small simplifications in 'luaD_poscall' 2017-11-23 16:29:41 -02:00
Roberto Ierusalimschy
196c87c9ce no more 'stackless' implementation; 'luaV_execute' calls itself 
recursively to execute function calls. 'unroll' continues all
executions suspended by an yield (through a long jump)
 2017-11-23 14:41:16 -02:00
Roberto Ierusalimschy
14c3aa12b5 more direct implementation for tail calls. 2017-11-21 12:18:03 -02:00
Roberto Ierusalimschy
ad0704e40c back to 'CallInfo' (no gains with its removal) 2017-11-07 11:25:26 -02:00
Roberto Ierusalimschy
93fd67b793 no more 'CallInfo' structure 2017-11-04 10:57:02 -02:00
Roberto Ierusalimschy
f96497397a new type 'StackValue' for stack elements 
(we may want to put extra info there in the future)
 2017-06-29 12:06:44 -03:00
Roberto Ierusalimschy
5c8770f896 back to old-style vararg system (with vararg table collecting extra 
arguments)
 2017-05-13 10:04:33 -03:00
Roberto Ierusalimschy
c0836dda74 avoid empty macro arguments (invalid in C89) 2015-12-21 11:02:14 -02:00
Roberto Ierusalimschy
c5112f7b15 details (comments) 2015-11-23 09:30:45 -02:00
Roberto Ierusalimschy
d103312661 details (typos in comments) 2015-11-19 17:16:22 -02:00
Roberto Ierusalimschy
9a5d6aedb7 trying to optimize a little 'luaD_poscall' 2015-11-13 11:24:26 -02:00
Roberto Ierusalimschy
ff1289a361 in 'luaD_call', use two functions instead of one with fixed boolean 
argument
 2015-11-02 16:48:07 -02:00
Roberto Ierusalimschy
8c1fb91802 macro 'incr_top' replaced by function 'luaD_inctop'. (It is not used 
in critical time pathes, can save a few bytes without the macro)
 2015-11-02 14:09:30 -02:00
Roberto Ierusalimschy
5bdee4f810 small changes to allow 'precall' to spend time preserving 'func' 
only when needed (that is, when stack actually changes)
 2015-10-21 16:40:47 -02:00
Roberto Ierusalimschy
d39bb51faa bug: interpreter cannot pop activation frame before calling return 
hook (as it may want to access local variables active by the end
of the function)
 2015-05-22 14:48:19 -03:00
Roberto Ierusalimschy
bdf566a8a3 `name' in comments changed to 'name' 2014-10-25 09:50:46 -02:00
Roberto Ierusalimschy
3617e04e97 'lua_load' has an extra argument 'mode' 2011-11-29 13:55:08 -02:00
Roberto Ierusalimschy
217e67cb22 new type 'l_noret' for function that do not return 2011-10-07 17:45:19 -03:00
Roberto Ierusalimschy
e0f9d1c8f5 removed export of function only for coco 2009-12-17 10:28:57 -02:00
Roberto Ierusalimschy
b0f2b288a6 new scheme for debug info about tail calls: no more 'fake' stack entries, 
but stack entry knows whether it was tail called
 2009-11-25 13:27:51 -02:00
Roberto Ierusalimschy
b40a38a8ac remove declaration of removed function 2009-11-19 14:24:41 -02:00
Roberto Ierusalimschy
f76f4cb79d new way to control stack overflow, controling only total size of the stack 2009-07-15 14:26:14 -03:00
Roberto Ierusalimschy
abb85fc059 new definition for 'luaD_checkstack' to avoid possible overflows 2009-07-08 13:06:51 -03:00
Roberto Ierusalimschy
4a67e48611 new macro 'condmovestack' instead of 'condhardstacktests' 2009-06-08 16:35:59 -03:00
Roberto Ierusalimschy
4f88418170 'CallInfo' stack implemented as double-linked list instead of an array 2009-04-17 11:28:06 -03:00
Roberto Ierusalimschy
ba484b9eb1 yielding across lua_call (first version) 2009-03-10 14:14:37 -03:00