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Skip next OSR in case forbidOSR flag is GC-ed. (Bug 751383, r=dvander)

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This commit is contained in:
Nicolas Pierron 2012-05-03 22:55:29 -07:00
parent 3b4de3be38
commit d2d5b6761f
1 changed files with 12 additions and 0 deletions
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12
js/src/ion/Bailouts.cpp
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@ -473,6 +473,18 @@ ion::ThunkToInterpreter(Value *vp)
IonActivation *activation = cx->runtime->ionActivation;
BailoutClosure *br = activation->takeBailout();
// By default we set the forbidOsr flag on the ion script, but if a GC
// happens just after we re-enter the interpreter, the ion script get
// invalidated and we do not see the forbidOsr flag. This may cause a loop
// which apear with eager compilation and gc zeal enabled. This code is a
// workaround to avoid recompiling with OSR just after a bailout followed by
// a GC. (see Bug 746691 & Bug 751383)
jsbytecode *pc = cx->regs().pc;
while (JSOp(*pc) == JSOP_GOTO)
pc += GET_JUMP_OFFSET(pc);
if (JSOp(*pc) == JSOP_LOOPENTRY)
cx->regs().pc = GetNextPc(pc);
bool ok = Interpret(cx, br->entryfp(), JSINTERP_BAILOUT);
if (ok)