gh-mirror/mikepaul-LuaJIT
1
0
Fork 0
mirror of https://github.com/LuaJIT/LuaJIT.git synced 2025-02-07 15:14:08 +00:00
Code Issues Actions Packages Projects Releases Wiki Activity

Avoid assertion in case of stack overflow from stitched trace.

Browse Source 
Reported by Sergey Bronnikov. Fixed by Sergey Kaplun.
This commit is contained in:
Mike Pall 2022-11-27 15:25:32 +01:00
parent 46aa45dcbd
commit 1d75cd4d7b
1 changed files with 6 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
src/lj_debug.c
View File

@ -101,9 +101,12 @@ static BCPos debug_framepc(lua_State *L, GCfunc *fn, cTValue *nextframe)
pos = proto_bcpos(pt, ins) - 1;
#if LJ_HASJIT
if (pos > pt->sizebc) { /* Undo the effects of lj_trace_exit for JLOOP. */
GCtrace *T = (GCtrace *)((char *)(ins-1) - offsetof(GCtrace, startins));
lj_assertL(bc_isret(bc_op(ins[-1])), "return bytecode expected");
pos = proto_bcpos(pt, mref(T->startpc, const BCIns));
if (bc_isret(bc_op(ins[-1]))) {
GCtrace *T = (GCtrace *)((char *)(ins-1) - offsetof(GCtrace, startins));
pos = proto_bcpos(pt, mref(T->startpc, const BCIns));
} else {
pos = NO_BCPOS; /* Punt in case of stack overflow for stitched trace. */
}
}
#endif
return pos;