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Bug 506018 - crash in js_GetClosureVar, regression from Trace JSOP_NAME for general closures. r=gal

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This commit is contained in:
David Mandelin 2009-07-24 14:00:35 -04:00
parent 2b030508f1
commit 72482b18da
1 changed files with 26 additions and 14 deletions
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40
js/src/jstracer.cpp
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@ -2117,13 +2117,13 @@ FlushNativeGlobalFrame(JSContext *cx, double *global, unsigned ngslots,
}
/*
* Generic function to read upvars on trace.
* Generic function to read upvars on trace from slots of active frames.
* T Traits type parameter. Must provide static functions:
* interp_get(fp, slot) Read the value out of an interpreter frame.
* native_slot(argc, slot) Return the position of the desired value in the on-trace
* stack frame (with position 0 being callee).
*
* upvarLevel Static level of the function containing the upvar definition.
* upvarLevel Static level of the function containing the upvar definition
* slot Identifies the value to get. The meaning is defined by the traits type.
* callDepth Call depth of current point relative to trace entry
*/
@ -2239,15 +2239,27 @@ js_GetUpvarStackOnTrace(JSContext* cx, uint32 upvarLevel, int32 slot, uint32 cal
return js_GetUpvarOnTrace<UpvarStackTraits>(cx, upvarLevel, slot, callDepth, result);
}
/*
* Generic function to read upvars from Call objects of active heavyweight functions.
* callee Callee Function object in which the upvar is accessed.
* scopeIndex Number of parent steps to make from |callee| to find upvar definition.
* This must be at least 1 because |callee| is a Function and we must reach a Call.
* slot Slot in Call object to read.
* callDepth callDepth of current point relative to trace entry.
*/
template<typename T>
uint32 JS_INLINE
js_GetFromClosure(JSContext* cx, JSObject* inner, uint32 scopeIndex, uint32 slot, uint32 callDepth,
js_GetFromClosure(JSContext* cx, JSObject* callee, uint32 scopeIndex, uint32 slot, uint32 callDepth,
double* result)
{
JSObject* call = OBJ_GET_PARENT(cx, inner);
for (uint32 i = 0; i < scopeIndex; ++i) {
JS_ASSERT(scopeIndex >= 1);
JS_ASSERT(OBJ_GET_CLASS(cx, callee) == &js_FunctionClass);
JSObject* call = callee;
for (uint32 i = 0; i < scopeIndex; ++i)
call = OBJ_GET_PARENT(cx, call);
}
JS_ASSERT(OBJ_GET_CLASS(cx, call) == &js_CallClass);
InterpState* state = cx->interpState;
FrameInfo** fip = state->rp + callDepth;
@ -2293,10 +2305,10 @@ private:
};
uint32 JS_FASTCALL
js_GetClosureArg(JSContext* cx, JSObject* inner, uint32 scopeIndex, uint32 slot, uint32 callDepth,
js_GetClosureArg(JSContext* cx, JSObject* callee, uint32 scopeIndex, uint32 slot, uint32 callDepth,
double* result)
{
return js_GetFromClosure<ArgClosureTraits>(cx, inner, scopeIndex, slot, callDepth, result);
return js_GetFromClosure<ArgClosureTraits>(cx, callee, scopeIndex, slot, callDepth, result);
}
struct VarClosureTraits
@ -2308,10 +2320,10 @@ private:
};
uint32 JS_FASTCALL
js_GetClosureVar(JSContext* cx, JSObject* inner, uint32 scopeIndex, uint32 slot, uint32 callDepth,
js_GetClosureVar(JSContext* cx, JSObject* callee, uint32 scopeIndex, uint32 slot, uint32 callDepth,
double* result)
{
return js_GetFromClosure<VarClosureTraits>(cx, inner, scopeIndex, slot, callDepth, result);
return js_GetFromClosure<VarClosureTraits>(cx, callee, scopeIndex, slot, callDepth, result);
}
/**
@ -6535,7 +6547,6 @@ TraceRecorder::scopeChainProp(JSObject* obj, jsval*& vp, LIns*& ins, bool& track
JSAtom* atom = atoms[GET_INDEX(cx->fp->regs->pc)];
JSObject* obj2;
JSProperty* prop;
JSObject* origobj = obj;
if (!js_FindProperty(cx, ATOM_TO_JSID(atom), &obj, &obj2, &prop))
ABORT_TRACE_ERROR("error in js_FindProperty");
if (!prop)
@ -6601,11 +6612,12 @@ TraceRecorder::scopeChainProp(JSObject* obj, jsval*& vp, LIns*& ins, bool& track
} else {
// Compute number of scope chain links to result.
jsint scopeIndex = 0;
JSObject* objd = origobj;
while (objd != obj) {
objd = OBJ_GET_PARENT(cx, objd);
JSObject* tmp = JSVAL_TO_OBJECT(cx->fp->argv[-2]);
while (tmp != obj) {
tmp = OBJ_GET_PARENT(cx, tmp);
scopeIndex++;
}
JS_ASSERT(scopeIndex >= 1);
LIns* callee_ins = get(&cx->fp->argv[-2]);
LIns* outp = lir->insAlloc(sizeof(double));