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Modifying upvars on trace (bug 557946, r=gal).

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This commit is contained in:
David Anderson 2010-04-20 22:42:00 -07:00
parent ed92fc7417
commit e86821540c
2 changed files with 25 additions and 2 deletions
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24
js/src/jstracer.cpp
View File

@ -11352,6 +11352,26 @@ TraceRecorder::setProp(jsval &l, PropertyCacheEntry* entry, JSScopeProperty* spr
return nativeSet(obj, obj_ins, sprop, v, v_ins);
}
JS_REQUIRES_STACK RecordingStatus
TraceRecorder::setUpwardTrackedVar(jsval* stackVp, jsval v, LIns* v_ins)
{
TraceType stackT = determineSlotType(stackVp);
TraceType otherT = getCoercedType(v);
bool promote = true;
if (stackT != otherT) {
if (stackT == TT_DOUBLE && otherT == TT_INT32 && isPromoteInt(v_ins))
promote = false;
else
RETURN_STOP("can't trace this upvar mutation");
}
set(stackVp, v_ins, promote);
return RECORD_CONTINUE;
}
JS_REQUIRES_STACK RecordingStatus
TraceRecorder::setCallProp(JSObject *callobj, LIns *callobj_ins, JSScopeProperty *sprop,
LIns *v_ins, jsval v)
@ -11363,14 +11383,14 @@ TraceRecorder::setCallProp(JSObject *callobj, LIns *callobj_ins, JSScopeProperty
JS_ASSERT(sprop->hasShortID());
uintN slot = uint16(sprop->shortid);
jsval *vp2 = &fp->argv[slot];
set(vp2, v_ins);
CHECK_STATUS(setUpwardTrackedVar(vp2, v, v_ins));
return RECORD_CONTINUE;
}
if (sprop->setterOp() == SetCallVar) {
JS_ASSERT(sprop->hasShortID());
uintN slot = uint16(sprop->shortid);
jsval *vp2 = &fp->slots[slot];
set(vp2, v_ins);
CHECK_STATUS(setUpwardTrackedVar(vp2, v, v_ins));
return RECORD_CONTINUE;
}
RETURN_STOP("can't trace special CallClass setter");

3
js/src/jstracer.h
View File

@ -1351,6 +1351,9 @@ class TraceRecorder
JS_REQUIRES_STACK TraceType determineSlotType(jsval* vp);
JS_REQUIRES_STACK RecordingStatus setUpwardTrackedVar(jsval* stackVp, jsval v,
nanojit::LIns* v_ins);
JS_REQUIRES_STACK AbortableRecordingStatus compile();
JS_REQUIRES_STACK AbortableRecordingStatus closeLoop();
JS_REQUIRES_STACK AbortableRecordingStatus closeLoop(VMSideExit* exit);