re: LIVE N0@44100 = 2048, oversample 4 (two SP instances agree); angle-ramp+Cody-Waite twiddle path confirmed for main FFT; rtone/rtver scripts

rtdeep2.py

@@ -0,0 +1,76 @@
+#!/usr/bin/env python3
+import subprocess, os, glob, sys, time, struct
+
+RPP = "/home/m/soothe-bt/render_long.rpp"
+proc = subprocess.Popen(['reaper', '-nosplash', '-renderproject', RPP],
+                        stdout=open('/tmp/rtdeep2.log', 'w'), stderr=subprocess.STDOUT)
+print('reaper', proc.pid, flush=True)
+
+
+def find_hosts():
+    out = []
+    for p in glob.glob('/proc/[0-9]*'):
+        try:
+            pid = int(os.path.basename(p))
+            m = open(f'/proc/{pid}/maps').read()
+            c = open(f'/proc/{pid}/cmdline', 'rb').read().decode('utf8', 'replace')
+            if 'soothe2' in m and 'yabridge-host.exe' in c:
+                out.append(pid)
+        except Exception:
+            pass
+    return out
+
+
+def scan(pid):
+    # strategy: enumerate every readable chunk; build set of img addresses whose content is 0x18052xxxx
+    # then find heap words equal to any such address
+    mem = os.open(f'/proc/{pid}/mem', os.O_RDONLY)
+    img_sp = set()          # vtbl-slot candidates: addrs in module image holding 0x18052xxxx
+    heap_addrs = []         # (va, chunk) heap chunks
+    maps = open(f'/proc/{pid}/maps').read()
+    for line in maps.splitlines():
+        p = line.split()
+        lo, hi = (int(x, 16) for x in p[0].split('-'))
+        if 'r' not in p[1]:
+            continue
+        try:
+            d = os.pread(mem, hi - lo, lo)
+        except Exception:
+            continue
+        if lo < 0x180000000 < hi or (0x180000000 <= lo < 0x183000000):
+            for off in range(0, len(d) - 7, 8):
+                q = struct.unpack_from('<Q', d, off)[0]
+                if 0x180520000 <= q < 0x180555000:
+                    img_sp.add(lo + off)
+        else:
+            heap_addrs.append((lo, d))
+    os.close(mem)
+    print('img SP-slot addrs found:', len(img_sp), flush=True)
+    # find heap objects pointing into img_sp
+    found = []
+    for lo, d in heap_addrs:
+        for s in img_sp:
+            t = struct.pack('<Q', s)
+            i = 0
+            while True:
+                i = d.find(t, i)
+                if i < 0:
+                    break
+                found.append((s, lo + i))
+                i += 1
+    return img_sp, found
+
+res = {}
+t0 = time.time()
+while time.time() - t0 < 80:
+    for pid in find_hosts():
+        if pid in res:
+            continue
+        img_sp, found = scan(pid)
+        res[pid] = (img_sp, found)
+        print('PID', pid, 'objects pointing to SP-method vtbl:', len(found), flush=True)
+        for s, a in found[:30]:
+            print(f'  slotslot {s:#x}  object@{a:#x}', flush=True)
+    time.sleep(0.4)
+proc.kill()
+print('done', flush=True)