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

2026-08-17 00:47:52 +03:00
parent abef5c6413
commit 230c6a63ad
9 changed files with 673 additions and 0 deletions
@@ -0,0 +1,92 @@
+#!/usr/bin/env python3
+import subprocess, os, glob, sys, time, struct, re
+
+RPP = sys.argv[1] if len(sys.argv) > 1 else "/home/m/soothe-bt/render_rt.rpp"
+KEEP = len(sys.argv) > 2 and sys.argv[2] == "keep"
+
+VPTR = 0x1824abb90  # SpectralProcessor vtbl first entry addr (static). verify at runtime too
+CTOR = 0x180529610
+
+proc = subprocess.Popen(
+    ['reaper', '-nosplash', '-renderproject', RPP],
+    stdout=open('/tmp/rtdump2.log', 'w'), stderr=subprocess.STDOUT)
+print('reaper', proc.pid, flush=True)
+
+host = None
+deadline = time.time() + 90
+while time.time() < deadline and not KEEP:
+    found = []
+    for p in glob.glob('/proc/[0-9]*'):
+        try:
+            pid = int(os.path.basename(p))
+            cmd = open(p + '/cmdline', 'rb').read().replace(b'\0', b' ').decode('utf8', 'replace')
+            if 'yabridge-host' not in cmd:
+                continue
+            maps = open(f'/proc/{pid}/maps').read()
+            if 'soothe2' in maps:
+                found.append(pid)
+        except Exception:
+            pass
+    if found:
+        host = found[0]
+        break
+    time.sleep(0.2)
+print('host', host, flush=True)
+if not host:
+    if not KEEP:
+        proc.kill()
+    sys.exit('no host')
+
+# gather ALL readable regions
+readable = []
+maps = open(f'/proc/{host}/maps').read()
+tot = 0
+for line in maps.splitlines():
+    parts = line.split()
+    lo, hi = (int(x, 16) for x in parts[0].split('-'))
+    if 'r' in parts[1]:
+        readable.append((lo, hi, parts[1]))
+        tot += hi - lo
+print('readable regions:', len(readable), 'total MB:', tot / 1e6, flush=True)
+
+mem = os.open(f'/proc/{host}/mem', os.O_RDONLY)
+pat = {v: struct.pack('<Q', v) for v in (VPTR,)}
+instances = []
+scanned = 0
+for lo, hi, _ in readable:
+    try:
+        d = os.pread(mem, hi - lo, lo)
+    except Exception:
+        continue
+    scanned += len(d)
+    for v, p in pat.items():
+        i = 0
+        while True:
+            i = d.find(p, i)
+            if i < 0:
+                break
+            instances.append((v, lo + i, hi))
+            i += 1
+os.close(mem)
+print('scanned bytes MB:', scanned / 1e6, 'instance hits:', len(instances), flush=True)
+
+if instances:
+    with open('/tmp/instances.txt', 'w') as f:
+        for v, addr, hi in instances:
+            f.write(f'{v:#x} {addr:#x} hi={hi:#x}\n')
+    # dump candidate object memory
+    out = '/tmp/inst_dump.bin'
+    with open(out, 'wb') as f:
+        mem = os.open(f'/proc/{host}/mem', os.O_RDONLY)
+        for v, addr, _ in instances[:16]:
+            base = addr - 0x80
+            f.write(os.pread(mem, 0x2000, base))
+        os.close(mem)
+    print('dumped candidates to', out, flush=True)
+else:
+    # no instance: dump the module .data section regardless so we can scan for globals
+    print('no instance found', flush=True)
+
+if not KEEP:
+    proc.kill()
+print('done', flush=True)