23c: negative feasibility — symmetric log-domain convolution cannot reproduce dual skirt geometry (best 0.94dB err at absurd 324-bin width); narrows mechanism to non-symmetric ops / true bands[] input / temporal coupling; capture recipe for DESIGN-input dump documented

scripts/fnall.py

@@ -13,6 +13,7 @@ import json
 import os
 import signal
 import struct
+import numpy as np
 import subprocess
 import sys
 import time
@@ -51,14 +52,23 @@ def pt(req, pid, addr=0, data=0):
 
 
 def find_host():
+    # fastest signal: any non-reaper child of a reaper process
+    reapers = []
+    for p in glob.glob('/proc/[0-9]*'):
+        try:
+            cmd = open(f'/proc/{p}/cmdline', 'rb').read()
+            if b'reaper' in cmd and b'yabridge' not in cmd:
+                reapers.append(int(os.path.basename(p)))
+        except Exception:
+            continue
     for p in glob.glob('/proc/[0-9]*'):
         pid = int(os.path.basename(p))
         try:
-            cmd = open(f'/proc/{pid}/cmdline', 'rb').read().replace(b'\0', b' ').decode('utf8', 'replace')
-            maps = open(f'/proc/{pid}/maps').read()
+            st = open(f'/proc/{pid}/stat').read().split()
+            ppid = int(st[3])
         except Exception:
             continue
-        if 'soothe2' in maps and 'reaper' not in cmd:
+        if ppid in reapers and pid not in reapers:
             return pid
     return None
 
@@ -176,7 +186,22 @@ def main():
                 rec = dict(ctx=regs.rcx, a2=regs.rdx, cnt=regs.r8 & 0xffffffff,
                            r9=regs.r9 & 0xffffffff, ret=ret,
                            rbx=regs.rbx, r12=regs.r12, r13=regs.r13,
-                           r14=regs.r14, r15=regs.r15, rsp=regs.rsp, tid=pid)
+                           r14=regs.r14, r15=regs.r15, rsp=regs.rsp, tid=pid,
+                           dump_in=[], dump_out=[], dump_r14=[], dump_rbx=[])
+                # dump arrays referenced by registers (process is stopped)
+                fdm = os.open(f'/proc/{host}/mem', os.O_RDONLY)
+
+                def rdarr(ptr, n=2049):
+                    try:
+                        b = os.pread(fdm, n * 4, ptr)
+                        return np.frombuffer(b, dtype='<f4').astype(np.float32).tolist()
+                    except OSError:
+                        return []
+                rec['dump_in'] = rdarr(regs.rcx)
+                rec['dump_out'] = rdarr(regs.rdx)
+                if FN != 0x18052dbc0:
+                    rec['dump_r14'] = rdarr(regs.r14)
+                os.close(fdm)
                 log.append(rec)
                 hits += 1
                 if hits <= 20: