23b: mask->FIR chain decoded — DESIGN body is vectorized LOG2 of band curve (poly fingerprinted), WIN_freq identified as periodic Hann(4096) falling half applied to FIR[n/2..n), full ILT stub->impl table resolved offline (ilt_resolve.py), live buffer catalog extended (SIMD lane masks at 0x540598, complex identity reset between callbacks, overlap buffer at 0x5406f8 non-zero), plugin output proven nondeterministic across renders (LCG dither) — spectral metrics only; ptrace lab scripts + lessons (TRACECLONE before CONT, sub-second host lifecycle under -renderproject)
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#!/usr/bin/env python3
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"""fntrace3.py — decisive INT3 experiment: seize ALL tids within milliseconds
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of host spawn, arm breakpoint, log EVERY waitpid event for N seconds."""
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import ctypes
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import glob
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import json
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import os
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import signal
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import struct
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import subprocess
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import sys
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import time
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FN = int(os.environ.get('FN_ADDR', '0x180529FE0'), 16)
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DUR = float(os.environ.get('FN_DUR', '25'))
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PTRACE_CONT = 7
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PTRACE_GETREGS = 12
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PTRACE_SETREGS = 13
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PTRACE_PEEKDATA = 2
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PTRACE_POKETEXT = 4
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PTRACE_SINGLESTEP = 9
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PTRACE_SEIZE = 0x4206
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PTRACE_INTERRUPT = 0x4207
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PTRACE_LISTEN = 0x4208
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PTRACE_O_TRACECLONE = 2
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libc = ctypes.CDLL('libc.so.6', use_errno=True)
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class UserRegs(ctypes.Structure):
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_fields_ = [(n, ctypes.c_ulonglong) for n in (
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'r15', 'r14', 'r13', 'r12', 'rbp', 'rbx', 'r11', 'r10',
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'r9', 'r8', 'rax', 'rcx', 'rdx', 'rsi', 'rdi', 'orig_rax',
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'rip', 'cs', 'eflags', 'rsp', 'ss', 'fs_base', 'gs_base',
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'ds', 'es', 'fs', 'gs')]
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def pt(req, pid, addr=0, data=0):
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libc.ptrace.restype = ctypes.c_long
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r = libc.ptrace(req, pid, ctypes.c_void_p(addr), ctypes.c_void_p(data))
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if r == -1:
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return None, ctypes.get_errno()
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return r, 0
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def find_host():
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for p in glob.glob('/proc/[0-9]*'):
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pid = int(os.path.basename(p))
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try:
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cmd = open(f'/proc/{pid}/cmdline', 'rb').read().replace(b'\0', b' ').decode('utf8', 'replace')
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maps = open(f'/proc/{pid}/maps').read()
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except Exception:
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continue
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if 'soothe2' in maps and 'reaper' not in cmd:
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return pid
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return None
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def main():
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rpp = '/home/m/soothe-bt/dual_b1q_0.5.rpp'
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subprocess.run('pkill -9 -x reaper; pkill -9 -f \'[y]abridge\'; sleep 1', shell=True)
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proc = subprocess.Popen(['/usr/bin/reaper', '-nosplash', '-ignoreerrors',
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'-renderproject', rpp],
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stdout=open('/dev/null', 'w'), stderr=subprocess.STDOUT)
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host = None
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t0 = time.time()
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while time.time() - t0 < 30 and not host:
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host = find_host()
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time.sleep(0.002)
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if not host:
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print('NO HOST')
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return 1
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print('host %d at %.3fs' % (host, time.time() - t0), flush=True)
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seized = []
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for tid in [host] + [int(os.path.basename(p)) for p in glob.glob(f'/proc/{host}/task/*')]:
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if tid in seized:
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continue
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r, e = pt(PTRACE_SEIZE, tid, 0, PTRACE_O_TRACECLONE)
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if r is None and e == 3: # ESRCH - gone
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continue
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seized.append(tid)
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# interrupt to allow poke below (poke needs SOME stopped thread)
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print('seized:', seized, flush=True)
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# stop one thread to enable POKETEXT
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tgt = seized[0]
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pt(PTRACE_INTERRUPT, tgt)
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os.waitpid(tgt, os.WUNTRACED)
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orig, _ = pt(PTRACE_PEEKDATA, tgt, FN)
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cc = (orig & ~0xFF) | 0xCC
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pt(PTRACE_POKETEXT, tgt, FN, cc)
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print('armed orig=%#x' % orig, flush=True)
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# seize any tids spawned meanwhile
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for tid in [int(os.path.basename(p)) for p in glob.glob(f'/proc/{host}/task/*')]:
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if tid not in seized:
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r, e = pt(PTRACE_SEIZE, tid, 0, PTRACE_O_TRACECLONE)
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if r is not None or e != 3:
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seized.append(tid)
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for tid in seized:
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try:
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pt(PTRACE_CONT, tid, 0, 0)
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except Exception:
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pass
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log = []
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events = []
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hits = 0
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t_end = time.time() + DUR
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last_resweep = 0.0
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while time.time() < t_end:
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now = time.time()
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if now - last_resweep > 0.05:
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last_resweep = now
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for tid_s in glob.glob(f'/proc/{host}/task/*'):
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tid = int(os.path.basename(tid_s))
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if tid not in seized:
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r, e = pt(PTRACE_SEIZE, tid, 0, PTRACE_O_TRACECLONE)
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if r is not None or e != 3:
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seized.append(tid)
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print('+tid', tid, flush=True)
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pid, status = os.waitpid(-1, os.WSTOPPED | os.WUNTRACED | os.WNOHANG)
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if pid == 0:
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time.sleep(0.001)
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continue
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sig = status >> 8
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ev = status >> 16
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events.append((time.time() - t0, pid, hex(status), ev))
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if pid not in seized:
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r, e = pt(PTRACE_SEIZE, pid, 0, PTRACE_O_TRACECLONE)
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if r is not None or e != 3:
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seized.append(pid)
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if ev == 3 or ev == 1:
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pt(PTRACE_CONT, pid, 0, 0)
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continue
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if os.WIFSTOPPED(pid) and sig == signal.SIGTRAP:
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regs = UserRegs()
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r, _ = pt(PTRACE_GETREGS, pid, 0, ctypes.addressof(regs))
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if r is None:
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continue
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if regs.rip - 1 == FN:
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ret, _ = pt(PTRACE_PEEKDATA, pid, regs.rsp)
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rec = dict(ctx=regs.rcx, a2=regs.rdx, cnt=regs.r8 & 0xffffffff,
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r9=regs.r9 & 0xffffffff, ret=ret, rbx=regs.rbx,
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r12=regs.r12, r13=regs.r13, r14=regs.r14,
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r15=regs.r15, rsp=regs.rsp, tid=pid)
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log.append(rec)
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hits += 1
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print('HIT ctx=%#x a2=%#x cnt=%#x ret=%#x'
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% (regs.rcx, regs.rdx, regs.r8 & 0xffffffff, ret), flush=True)
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pt(PTRACE_POKETEXT, pid, FN, orig)
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regs.rip = FN
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pt(PTRACE_SETREGS, pid, 0, ctypes.addressof(regs))
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pt(PTRACE_SINGLESTEP, pid, 0, 0)
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os.waitpid(pid, os.WUNTRACED)
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pt(PTRACE_POKETEXT, pid, FN, cc)
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pt(PTRACE_CONT, pid, 0, 0)
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else:
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pt(PTRACE_CONT, pid, 0, 0)
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elif os.WIFEXITED(status) or os.WIFSIGNALED(status):
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continue
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else:
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pt(PTRACE_CONT, pid, 0, sig if 0 < sig < 32 else 0)
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print('total hits:', hits, 'events:', len(events))
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json.dump(dict(log=log, events=events[:400]),
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open('/tmp/opencode/fntrace/hits3.json', 'w'), indent=1)
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proc.kill()
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return 0
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if __name__ == '__main__':
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sys.exit(main())
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