Notes by MC

Links

runtime/windows/thread.c
- syscall(…)
- stdcall(…)
- newosproc(…)
- get_proc_addr(…), get_proc_addr2(…)
runtime/windows/sys.s
- stdcall_raw(…)
- get_kernel_module(…)
runtime/386/asm.h
- get_tls(register)
runtime/windows/syscall.goc
- see also: goc2c.c, Makefile
runtime/proc.c
- tracebackothers(…), entersyscall(…)
runtime/cgocall.c
- cgocall(…), cgocallback(…)
runtime/runtime.h
- M, G, m, g

The number of goroutines actively running is the number of M structures that are running. Look at runtime·sched for various useful counts and lists. (link)
To find the goroutines that exist, whether or not they are running, start at runtime·allg and walk through the alllink field. Don't count the ones whose status field == Gdead. (link)