23m: round final — DR-trap delivery anomaly under wine threads documented (near-zero stops despite verified arming and confirmed module execution); full stop-logging added to fnexec; roadmap to bit-exact fixed: G-form via stabilized series, consumer via init-family decode or perf_event HW breakpoints, then RT_FIRCONV gate

scripts/fnexec.py

@@ -74,6 +74,7 @@ def main():
         print('NO HOST')
         return 1
     print('host %d at %.2fs' % (host, time.time() - t0), flush=True)
+    fd = os.open(f'/proc/{host}/mem', os.O_RDONLY)
 
     # EARLY arm: exec watch on DESIGN bodies (inherited by future clones)
     fd0 = os.open(f'/proc/{host}/mem', os.O_RDONLY)
@@ -127,6 +128,7 @@ def main():
     print('armed %d/%d tids' % (len(armed), len(seized)), flush=True)
 
     n0 = n1 = 0
+    STOPLOG=[]
     samples = []
     t_end = time.time() + DUR
     last_sweep = 0.0
@@ -151,6 +153,9 @@ def main():
                         time.sleep(0.001)
                     if arm(tid):
                         armed.add(tid)
+                        d0=pt(PTRACE_PEEKUSER,tid,DR_BASE)
+                        d7=pt(PTRACE_PEEKUSER,tid,DR7_OFF)
+                        print('   tid %d dr0=%#x dr7=%#x'%(tid,d0 or 0,d7 or 0),flush=True)
                     try:
                         pt(PTRACE_CONT, tid, 0, 0)
                     except OSError:
@@ -162,6 +167,21 @@ def main():
         if pid == 0:
             time.sleep(0.0004)
             continue
+        ent=[round(time.time()-t0,3), pid, hex(status)]
+        if os.WIFSTOPPED(pid) and (status>>8)==5:
+            rg=UserRegs()
+            if pt(PTRACE_GETREGS,pid,0,ctypes.addressof(rg)) is not None:
+                ent+= [rg.rip, pt(PTRACE_PEEKUSER,pid,DR_BASE+48)]
+                # auto-dump arrays on design hits
+                if rg.rip in (0x1802A24C0,0x1802FA420):
+                    def dmp(ptr):
+                        try:
+                            b=os.pread(fd,2049*4,ptr)
+                            return np.frombuffer(b,dtype='<f4').astype(np.float32).tolist()
+                        except OSError: return []
+                    ent.append({'rcx':rg.rcx,'rdx':rg.rdx,
+                                'in':dmp(rg.rcx),'out':dmp(rg.rdx)})
+        STOPLOG.append(ent)
         sig = status >> 8
         if os.WIFEXITED(status) or os.WIFSIGNALED(status):
             continue
@@ -222,8 +242,8 @@ def main():
     print('hits: 529fe0=%d loop=%d render_fresh=%s armed=%d/%d'
           % (n0, n1, fresh, len(armed), len(seized)))
     import json
-    json.dump(samples[:300], open('/tmp/opencode/fnexec/hits.json', 'w'),
-              indent=1, default=str)
+    json.dump(dict(samples=samples[:300], stops=STOPLOG[:4000]),
+              open('/tmp/opencode/fnexec/hits.json', 'w'), indent=1, default=str)
     proc.kill()
     return 0