chore: add rt-capture artifacts (rtobj/rtsnap scripts, rwin_*.npy tables, dsp grep dumps, rpp param decoders)

rtsnap.py

@@ -0,0 +1,44 @@
+#!/usr/bin/env python3
+"""rtsnap.py — differential snapshot of a live process for ctx discovery.
+Captures readable regions page-wise (skipping EIO pages), stores: index(file) + regions.raw
+Usage: rtsnap.py <pid> <outprefix>
+"""
+import os, struct, sys
+
+pid = int(sys.argv[1])
+pre = sys.argv[2]
+mem = os.open(f'/proc/{pid}/mem', os.O_RDONLY)
+regs = []
+off = 0
+for line in open(f'/proc/{pid}/maps'):
+    p = line.split()[0]
+    lo, hi = [int(x, 16) for x in p.split('-')]
+    perm = line.split()[1]
+    if perm[0] != 'r':
+        continue
+    if 'vst3' in line or 'dri' in line or 'shm' in line:
+        continue
+    if hi - lo > 0x40000000:
+        continue
+    regs.append((lo, hi))
+print(f'{len(regs)} regions', flush=True)
+idx = []
+raw = bytearray()
+for lo, hi in regs:
+    rstart = len(raw)
+    sz = 0
+    for pg in range(lo, hi, 0x1000):
+        try:
+            b = os.pread(mem, 0x1000, pg)
+            raw.extend(b)
+            sz += len(b)
+        except Exception:
+            raw.extend(b'\0' * 0x1000)
+    idx.append((lo, rstart, sz))
+with open(pre + '.raw', 'wb') as f:
+    f.write(bytes(raw))
+with open(pre + '.idx', 'wb') as f:
+    for lo, rstart, sz in idx:
+        f.write(struct.pack('<QQQ', lo, rstart, sz))
+os.close(mem)
+print(f'done: raw={len(raw)} bytes', flush=True)