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273 Commits

Author SHA1 Message Date
Roberto Ierusalimschy
02bab9fc25 Bug: Wrong line in error message for arith. errors 
It also causes 'L->top' to be wrong when the error happens,
triggering an 'assert'.
 2023-02-08 14:15:41 -03:00
Roberto Ierusalimschy
b5ab31a475 Merge branch 'master' into nextversion 2022-12-28 18:38:20 -03:00
Roberto Ierusalimschy
314745ed84 Avoid excessive name pollution in test files 
Test files are more polite regarding the use of globals when locals
would do, and when globals are necessary deleting them after use.
 2022-12-28 18:34:11 -03:00
Roberto Ierusalimschy
140cdcced5 Merge branch 'master' into nextversion 2022-12-23 11:30:07 -03:00
Roberto Ierusalimschy
0825cf237d Detail in make file for testes/libs 
Everything depends on the Lua version (as given by 'lua.h')
 2022-12-23 11:28:11 -03:00
Roberto Ierusalimschy
7d4c7ae2af Changes in opcodes for generic 'for' 
Again, as the control variable is read only, the code doesn't need
to keep an internal copy of it.
 2022-12-22 13:52:53 -03:00
Roberto Ierusalimschy
b2f7b3b79f Control variables in for loops are read only 2022-12-21 12:04:59 -03:00
Roberto Ierusalimschy
540d805226 Towards Lua 5.5 2022-12-20 13:24:43 -03:00
Roberto Ierusalimschy
7d6a97e42b Dump doesn't need to reuse 'source' 
All strings are being reused now, including 'source'.
 2022-12-20 11:14:52 -03:00
Roberto Ierusalimschy
d738c8d18b New function 'luaL_openselectedlibs' 
Makes it easier to start Lua with only some standard libraries.
 2022-12-07 15:12:52 -03:00
Roberto Ierusalimschy
8047b2d03e Tables have a 'lastfree' information only when needed 
Only tables with some minimum number of entries in their hash part
have a 'lastfree' field, kept in a header before the node vector.
 2022-11-01 15:42:08 -03:00
Roberto Ierusalimschy
1e64c1391f Bug: stack overflow with nesting of coroutine.close 2022-10-25 16:44:06 -03:00
Roberto Ierusalimschy
7f12bf40c4 Portability issue in a test for 'string.format' 2022-10-19 16:20:11 -03:00
Roberto Ierusalimschy
26be27459b Negation in constant folding of '>>' may overflow 2022-09-23 11:08:10 -03:00
Roberto Ierusalimschy
cfbe378f90 Small simplification in overflow check in 'getfield' 
Subtracting a small non-negative int from a non-negative int cannot
overflow, and adding a non-negative int to INT_MIN cannot overflow.
 2022-09-23 10:57:35 -03:00
Roberto Ierusalimschy
a1089b415a Bug: 'utf8.codes' accepts spurious continuation bytes 2022-09-23 10:41:16 -03:00
Roberto Ierusalimschy
f8c4c4fcf2 New test for table rehash 2022-09-16 17:05:22 -03:00
Roberto Ierusalimschy
997f11f543 Bug: 'break' may not properly close variable in a 'for' loop 
Function 'leaveblock' was generating "break" label before removing
variables from the closing block. If 'createlabel' created a 'close'
instruction (which it did when matching a goto/break that exited
the scope of an upvalue), that instruction would use the wrong level.
 2022-08-24 17:36:47 -03:00
Roberto Ierusalimschy
02060b7a37 Simpler handling of Byte Order Mark (BOM) 2022-08-23 16:08:53 -03:00
Roberto Ierusalimschy
d61b0c6028 More checks and documentation for uses of EXTRA_STACK 2022-05-26 15:14:54 -03:00
Roberto Ierusalimschy
196bb94d66 Bug: 'lua_settop' may use an invalid pointer to stack 2022-05-25 17:41:39 -03:00
Roberto Ierusalimschy
4a00f61276 'lua_checkstack' doesn't need to check stack overflow 
'luaD_growstack' already checks that. This commit also fixes an
internal bug in 'luaD_growstack': a large 'n' could cause an arithmetic
overflow when computing 'needed'.
 2022-05-23 10:38:03 -03:00
Roberto Ierusalimschy
c764ca71a6 Bug: Wrong code generation in bitwise operations 2022-04-25 14:42:51 -03:00
Roberto Ierusalimschy
1f3c6f4534 Bug: Lua can generate wrong code when _ENV is <const> 2022-02-15 12:28:46 -03:00
Roberto Ierusalimschy
597a53bbc6 Bug: finalizer calling exit can corrupt finalization order 
'os.exit' can call lua_close again, separating new finalizers
created after all previous finalizers were already separated.
 2021-12-22 09:00:52 -03:00
Roberto Ierusalimschy
066e0f93c4 Fix debug information about finalizers 
The flag CIST_FIN does not mark a finalizer, but the function that was
running when the finalizer was called. (So, the function did not call
the finalizer, but it looks that way in the stack.)
 2021-12-14 12:50:05 -03:00
Roberto Ierusalimschy
0bfc572e51 Bug: GC is not reentrant 
As the GC is not reentrant, finalizers should not be able to invoke it.
 2021-12-13 10:41:17 -03:00
Roberto Ierusalimschy
48835c76c8 Wrong assert in 'collectvalidlines' 2021-11-25 10:11:05 -03:00
Roberto Ierusalimschy
e8deac5a41 Avoid OP_VARARGPREP for active lines 
when building the table 'activelines' for a vararg function, this
first instruction does not make the first line active.
 2021-11-10 15:07:14 -03:00
Roberto Ierusalimschy
bfbff3703e Bug: Wrong status in coroutine during reset 
When closing variables during 'coroutine.close' or 'lua_resetthread',
the status of a coroutine must be set to LUA_OK; a coroutine should
not run with any other status. (See assertion in 'lua_callk'.)

After the reset, the status should be kept as normal, as any error
was already reported.
 2021-11-08 11:55:25 -03:00
Roberto Ierusalimschy
74d99057a5 Bug: C stack overflow with coroutines 
'coroutine.resume' did not increment counter of C calls when
continuing execution after a protected error (that is,
while running 'precover').
 2021-11-03 15:04:18 -03:00
Roberto Ierusalimschy
deac067ed3 Avoid overflows when incrementing parameters in C 
Any C function can receive maxinteger as an integer argument, and
therefore cannot increment it without some care (e.g., doing unsigned
arithmetic as the core does).
 2021-09-22 13:10:39 -03:00
Roberto Ierusalimschy
9db4bfed6b Revamp of format validation in 'string.format' 
When calling 'sprintf', not all conversion specifiers accept all
flags; some combinations are undefined behavior.
 2021-09-03 13:14:56 -03:00
Roberto Ierusalimschy
a393ac2554 Detail in 'testes/math.lua' 
Added a print with the random seeds used in the tests of 'random'.
 2021-08-18 10:46:18 -03:00
Roberto Ierusalimschy
65434b4d1b Option '-l' can give a name for the global variable. 
Sintax for this option now is '-l [globname=]modname'.
 2021-08-16 13:57:19 -03:00
Roberto Ierusalimschy
59acd79c05 Added tests for string reuse by the scanner 2021-08-11 11:19:33 -03:00
Roberto Ierusalimschy
439e45a2f6 Bug: luaL_tolstring may get confused with negative index 
When object has a '__name' metafield, 'luaL_tolstring' used the
received index after pushing a string on the stack.
 2021-07-22 13:48:43 -03:00
Roberto Ierusalimschy
62fb934427 Bug: Negation in 'luaV_shiftr' may overflow 
Negation of an unchecked lua_Integer overflows with mininteger.
 2021-07-22 13:44:53 -03:00
Roberto Ierusalimschy
6a0dace25a Bug: 'local function' can assign to '<const>' variables 2021-06-20 15:36:36 -03:00
Roberto Ierusalimschy
04e19712a5 C functions can be tail called, too 
A tail call to a C function can have the behavior of a "real" tail
call, reusing the stack frame of the caller.
 2021-06-14 13:28:21 -03:00
Roberto Ierusalimschy
681297187e Bug: yielding in '__close' mess up number of returns 
Yielding in a __close metamethod called when returning vararg results
changes the top and so messes up the number of returned values.
 2021-04-16 15:41:44 -03:00
Roberto Ierusalimschy
47cffdc723 Bug: tbc variables in "for" loops don't avoid tail calls 2021-04-07 14:59:26 -03:00
Roberto Ierusalimschy
36de01d988 Changes in cache for function constants 
In 'lcode.c', when adding constants to the list of constants of a
function, integers represent themselves in the cache and floats
with integral values get a small delta to avoid collision with
integers. (This change avoids creating artificial addresses; the old
implementation converted integers to pointers to index the cache.)
 2021-03-30 14:49:18 -03:00
Roberto Ierusalimschy
bf10593a3a Allow yields inside '__pairs' 2021-03-29 12:57:32 -03:00
Roberto Ierusalimschy
05b13651f9 File 'tracegc.lua' added to 'packtests' 2021-03-10 10:35:57 -03:00
Roberto Ierusalimschy
511d53a826 lua_settop/lua_pop closes to-be-closed variables 
The existence of 'lua_closeslot' is no reason for lua_pop not to close
to-be-closed variables too.  It is too error-prone for lua_pop not to
close tbc variables being popped from the stack.
 2021-03-09 11:42:45 -03:00
Roberto Ierusalimschy
f5df7f91f7 Wrong assertion in 'getbaseline' 
The assertion cannot compute 'f->abslineinfo[i]' when the initial
estimate 'i' is -1.
 2021-03-05 12:10:34 -03:00
Roberto Ierusalimschy
5276973224 New test module 'tracegc' 
New module easies the inclusion of GC tracing in individual test files.
 2021-03-01 13:54:29 -03:00
Roberto Ierusalimschy
1537d6680b New control for reentrancy of emergency collections 
Instead of assuming that shrinking a block may be an emergency
collection, use an explicit field ('gcstopem') to stop emergency
collections while GC is working.
 2021-02-26 11:41:02 -03:00
Roberto Ierusalimschy
e0260eb2d4 Bug (kind of) in 'isinstack' 
The function 'isinstack' tried to work around the undefined behavior
of subtracting two pointers that do not point to the same object,
but the compiler killed to trick. (It optimizes out the safety check,
because in a correct execution it will be always true.)
 2021-02-25 13:39:36 -03:00