cpuinit(godebug) // must run before alginit
	randinit()       // must run before alginit, mcommoninit
	alginit()        // maps, hash, rand must not be used before this call
	mcommoninit(gp.m, -1)
	modulesinit()   // provides activeModules
	typelinksinit() // uses maps, activeModules
	itabsinit()     // uses activeModules
	stkobjinit()    // must run before GC starts

	sigsave(&gp.m.sigmask)
	initSigmask = gp.m.sigmask