bool
TraceLoggerThread::enable(JSContext* cx)
{
if (!enable())
return fail(cx, "internal error");
if (enabled_ == 1) {
// Get the top Activation to log the top script/pc (No inlined frames).
ActivationIterator iter(cx->runtime());
Activation* act = iter.activation();
if (!act)
return fail(cx, "internal error");
JSScript* script = nullptr;
int32_t engine = 0;
if (act->isJit()) {
JitFrameIterator it(iter);
while (!it.isScripted() && !it.done())
++it;
MOZ_ASSERT(!it.done());
MOZ_ASSERT(it.isIonJS() || it.isBaselineJS());
script = it.script();
engine = it.isIonJS() ? TraceLogger_IonMonkey : TraceLogger_Baseline;
} else if (act->isWasm()) {
JS_ReportErrorNumber(cx, GetErrorMessage, nullptr, JSMSG_TRACELOGGER_ENABLE_FAIL,
"not yet supported in wasm code");
return false;
} else {
MOZ_ASSERT(act->isInterpreter());
InterpreterFrame* fp = act->asInterpreter()->current();
MOZ_ASSERT(!fp->runningInJit());
script = fp->script();
engine = TraceLogger_Interpreter;
if (script->compartment() != cx->compartment())
return fail(cx, "compartment mismatch");
}
TraceLoggerEvent event(this, TraceLogger_Scripts, script);
startEvent(event);
startEvent(engine);
}
return true;
}
