# gdb script: at the libcuda error-scanner entry (FUN_0054fa00), walk the
# context list and dump every non-zero RM error record (magic words,
# errorClass at +0x8, shorts at +0xc/+0xe). This names the source of a
# forced 999: the scanner returns 999 when param_2 != 0 and any record's
# class fields are non-zero.
# Run: sudo gdb -p <cdt-pid> -batch -x /tmp/scanerr.py
import gdb

out = gdb.execute("info proc mappings", to_string=True)
base = None
for line in out.splitlines():
    if "libcuda" in line and "r-xp" in line:
        f = line.split()
        base = int(f[0], 16) - int(f[3], 16)
        break
print("BASE=0x%x" % (base or 0))
if base is None:
    raise SystemExit

gdb.execute("set pagination off")
gdb.execute("set confirm off")
gdb.execute("break *0x%x" % (base + 0x44fa00))
try:
    gdb.execute("continue")
except gdb.error as e:
    print("CONTINUE %s" % e)
print("HIT")


def rd64(a):
    try:
        return int(gdb.parse_and_eval("*(unsigned long *)0x%x" % a)) & 0xffffffffffffffff
    except Exception:
        return None


def rd32(a):
    try:
        return int(gdb.parse_and_eval("*(unsigned int *)0x%x" % a)) & 0xffffffff
    except Exception:
        return None


try:
    p1 = int(gdb.parse_and_eval("$rdi")) & 0xffffffffffffffff
    p2 = int(gdb.parse_and_eval("$rsi")) & 0xffffffff
    print("param_1=0x%x param_2=%d" % (p1, p2))
    pl = rd64(p1)
    n = 0
    while pl and n < 64:
        mgr = rd64(pl + 0x1291 * 8)
        if mgr:
            reg = rd64(mgr + 0x10)
            if reg:
                rec = rd64(reg + 0x10)
                if rec:
                    vals = [rd32(rec + i) or 0 for i in range(0, 0x28, 4)]
                    if any(vals):
                        print("ENTRY %d ctx=0x%x mgr=0x%x rec=0x%x rec=%s" %
                              (n, pl, mgr, rec,
                               ' '.join('0x%08x' % v for v in vals)))
        pl = rd64(pl + 0x128e * 8)
        n += 1
    print("WALKED %d" % n)
except Exception as e:
    print("dump_fail %s" % e)
try:
    gdb.execute("bt 8", to_string=True)
except Exception:
    pass
try:
    gdb.execute("detach")
except Exception:
    pass