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Bug 503286 - Use the right sp for sp_adj to account for tree calls fiddling with state.sp after we've deep bailed. r=jorendorff

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--HG--
extra : rebase_source : 2d3e2237ef82d4ea5980b4ece9b484344f450036
This commit is contained in:
Blake Kaplan 2009-07-13 15:44:33 -07:00
parent f552010935
commit d142d70ad5
2 changed files with 16 additions and 2 deletions
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15
js/src/jstracer.cpp
View File

@ -5195,10 +5195,18 @@ LeaveTree(InterpState& state, VMSideExit* lr)
* but we have it now. Box it.
*/
JSTraceType* typeMap = getStackTypeMap(innermost);
/*
* If there's a tree call around the point that we deep exited at,
* then state.sp and state.rp were restored to their original
* values before the tree call and sp might be less than deepBailSp,
* which we sampled when we were told to deep bail.
*/
JS_ASSERT(state.deepBailSp >= state.stackBase && state.sp <= state.deepBailSp);
NativeToValue(cx,
cx->fp->regs->sp[-1],
typeMap[innermost->numStackSlots - 1],
(jsdouble *) state.sp + innermost->sp_adj / sizeof(jsdouble) - 1);
(jsdouble *) state.deepBailSp + innermost->sp_adj / sizeof(jsdouble) - 1);
}
JSTraceMonitor* tm = &JS_TRACE_MONITOR(cx);
if (tm->prohibitFlush && --tm->prohibitFlush == 0 && tm->needFlush)
@ -6226,7 +6234,10 @@ js_DeepBail(JSContext *cx)
debug_only_print0(LC_TMTracer, "Deep bail.\n");
LeaveTree(*tracecx->interpState, tracecx->bailExit);
tracecx->bailExit = NULL;
tracecx->interpState->builtinStatus |= JSBUILTIN_BAILED;
InterpState* state = tracecx->interpState;
state->builtinStatus |= JSBUILTIN_BAILED;
state->deepBailSp = state->sp;
}
JS_REQUIRES_STACK jsval&

3
js/src/jstracer.h
View File

@ -512,6 +512,9 @@ struct InterpState
* if an error or exception occurred.
*/
uint32 builtinStatus;
// Used to communicate the location of the return value in case of a deep bail.
double* deepBailSp;
};
static JS_INLINE void