import subprocess, os, glob, time, struct
def mem_open(pid): return os.open(f'/proc/{pid}/mem', os.O_RDONLY)
def find_host(proc, wait=120):
    t0=time.time()
    while time.time()-t0<wait:
        for p in glob.glob('/proc/[0-9]*'):
            try:
                pid=int(os.path.basename(p))
                cmd=open(f'/proc/{pid}/cmdline','rb').read().replace(b'\0',b' ').decode('utf8','replace')
                maps=open(f'/proc/{pid}/maps').read()
            except Exception: continue
            if 'yabridge-host' in cmd and 'soothe2' in maps: return pid
        time.sleep(0.05)
    return None
os.system("pkill -9 -x reaper 2>/dev/null; pkill -9 -f '[y]abridge' 2>/dev/null; sleep 1")
proc=subprocess.Popen(['/usr/bin/reaper','-nosplash','-ignoreerrors','-renderproject','/home/m/soothe-bt/dual300.rpp'],
                      stdout=open('/dev/null','w'),stderr=subprocess.STDOUT)
host=find_host(proc); print('host',host)
time.sleep(4)
fd=mem_open(host)
SIG=struct.pack('<I',0x472c4400)
t0=time.time(); total=0; hits={}
for line in open(f'/proc/{host}/maps').read().splitlines():
    p=line.split(); lo,hi=(int(x,16) for x in p[0].split('-'))
    if 'r' not in p[1]: continue
    t0r=time.time()
    ok_read=0
    a=lo
    while a<hi:
        n=min(hi-a, 0x400000)
        try:
            d=os.pread(fd,n,a)
        except Exception:
            a+=n; continue
        if not d:
            a+=n; continue
        ok_read+=len(d)
        i=0
        while True:
            i=d.find(SIG,i)
            if i<0: break
            hits[a+i]=None; i+=1
        a+=n
    if ok_read:
        print(' 0x%x-%x MB=%.1f ok=%.1fMB'%(lo,hi,(hi-lo)/1e6,ok_read/1e6))
    total+=ok_read
print('scanned ok=%.0fMB t=%.1fs n44100=%d'%(total/1e6,time.time()-t0,len(hits)))
for a in list(hits)[:5]:
    print('  HIT 0x%x'%a)
proc.kill()