SpiderMonkey执行JIT的时机

来源：互联网发布：守望先锋数据面板编辑：程序博客网时间：2024/06/07 02:43

JIT编译以及执行的相关函数：

//Baselineif (jit::IsBaselineEnabled(cx)) {                                          //Enter Baseline at branch    jit::MethodStatus status = jit::CanEnterBaselineAtBranch(cx, REGS.fp(), false);    if (status == jit::Method_Compiled) {                                     jit::EnterBaselineAtBranch(cx, REGS.fp(), REGS.pc);    }    //Enter Baseline method    jit::MethodStatus status = jit::CanEnterBaselineMethod(cx, state);    if (status == jit::Method_Compiled) {        jit::JitExecStatus status = jit::EnterBaselineMethod(cx, state);    }}

//Ionif (!createSingleton && jit::IsIonEnabled(cx)) {    jit::MethodStatus status = jit::CanEnter(cx, state.ref());    if (status == jit::Method_Compiled) {        jit::JitExecStatus exec = jit::IonCannon(cx, state.ref());    }}

在RunScript()以及它调用的Interpret()里面都会执行以上逻辑。RunScript调用树如图：

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