gh-mirror/mikepaul-LuaJIT
1
0
Fork 0
mirror of https://github.com/LuaJIT/LuaJIT.git synced 2025-02-07 23:24:09 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

LJ_GC64: Always snapshot functions for non-base frames.

Browse Source 
Reported by Arseny Vakhrushev.
Analysis and fix contributed by Peter Cawley.
This commit is contained in:
Mike Pall 2020-08-27 18:05:32 +02:00
parent 94d4abcca9
commit ff1e72acea
2 changed files with 8 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
src/lj_record.c
View File

@ -211,6 +211,7 @@ static TRef getcurrf(jit_State *J)
{
if (J->base[-1-LJ_FR2])
return J->base[-1-LJ_FR2];
/* Non-base frame functions ought to be loaded already. */
lj_assertJ(J->baseslot == 1+LJ_FR2, "bad baseslot");
return sloadt(J, -1-LJ_FR2, IRT_FUNC, IRSLOAD_READONLY);
}

9
src/lj_snap.c
View File

@ -85,8 +85,13 @@ static MSize snapshot_slots(jit_State *J, SnapEntry *map, BCReg nslots)
IRIns *ir = &J->cur.ir[ref];
if ((LJ_FR2 || !(sn & (SNAP_CONT|SNAP_FRAME))) &&
ir->o == IR_SLOAD && ir->op1 == s && ref > retf) {
/* No need to snapshot unmodified non-inherited slots. */
if (!(ir->op2 & IRSLOAD_INHERIT))
/*
** No need to snapshot unmodified non-inherited slots.
** But always snapshot the function below a frame in LJ_FR2 mode.
*/
if (!(ir->op2 & IRSLOAD_INHERIT) &&
(!LJ_FR2 || s == 0 || s+1 == nslots ||
!(J->slot[s+1] & (TREF_CONT|TREF_FRAME))))
continue;
/* No need to restore readonly slots and unmodified non-parent slots. */
if (!(LJ_DUALNUM && (ir->op2 & IRSLOAD_CONVERT)) &&