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Fix frame traversal for backtraces.

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This commit is contained in:
Mike Pall 2013-09-03 15:53:21 +02:00
parent a6936be814
commit fffe75a03b
1 changed files with 12 additions and 5 deletions
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17
src/lj_debug.c
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@ -71,9 +71,18 @@ static BCPos debug_framepc(lua_State *L, GCfunc *fn, cTValue *nextframe)
/* Lua function below errfunc/gc/hook: find cframe to get the PC. */ /* Lua function below errfunc/gc/hook: find cframe to get the PC. */
void *cf = cframe_raw(L->cframe); void *cf = cframe_raw(L->cframe);
TValue *f = L->base-1; TValue *f = L->base-1;
if (cf == NULL) for (;;) {
return NO_BCPOS; if (cf == NULL)
while (f > nextframe) { return NO_BCPOS;
while (cframe_nres(cf) < 0) {
if (f >= restorestack(L, -cframe_nres(cf)))
break;
cf = cframe_raw(cframe_prev(cf));
if (cf == NULL)
return NO_BCPOS;
}
if (f < nextframe)
break;
if (frame_islua(f)) { if (frame_islua(f)) {
f = frame_prevl(f); f = frame_prevl(f);
} else { } else {
@ -82,8 +91,6 @@ static BCPos debug_framepc(lua_State *L, GCfunc *fn, cTValue *nextframe)
f = frame_prevd(f); f = frame_prevd(f);
} }
} }
if (cframe_prev(cf))
cf = cframe_raw(cframe_prev(cf));
ins = cframe_pc(cf); ins = cframe_pc(cf);
} }
} }