# gdb script: name the silent-rollback 999 site in the cuCtxCreate path.
#
# Sites (file vaddr of libcuda.so.570.144; runtime = base + off):
#   0x222e99  FUN_00322190: cmp $0x88,%eax (work-submission offset delta
#             computed from two RM helper calls); next insn jumps to the
#             999 store when delta > 0x88.
#   0x223402  FUN_00322190: rc=999 (delta > 0x88)
#   0x223452  FUN_00322190: rc=999 (neither GR nor CE engine pointer found)
#   0x2231ab  FUN_00322190: store of FUN_0031a3b0 (engine event pump) return
#   0x277840  FUN_00377680: rc=999 (context-register helper failed)
#   0x27640b  FUN_00374240: rc=999 (malloc(0x40) failed)
#   0x44fb80  FUN_0054fa00: scanner forced 999
#   0x44fb6c  FUN_0054fa00: scanner return 0x2cf
#
# Run: sudo gdb -p <cdt-pid> -batch -x /tmp/bpz.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:
    print("NO_LIBCUDA")
    raise SystemExit

gdb.execute("set pagination off")
gdb.execute("set confirm off")

SITES = [
    (0x222e99, "SIZEDELTA"),
    (0x223402, "SIZE999"),
    (0x223452, "ENGINE999"),
    (0x2231ab, "AFTER_PUMP"),
    (0x277840, "CTXREF999"),
    (0x27640b, "MALLOC999"),
    (0x44fb80, "SCAN999"),
    (0x44fb6c, "SCAN2cf"),
]
for off, name in SITES:
    gdb.execute("break *0x%x" % (base + off))

for hit in range(80):
    try:
        gdb.execute("continue")
    except gdb.error as e:
        print("CONTINUE_END %s" % e)
        break
    try:
        rip = int(gdb.parse_and_eval("$rip")) & 0xffffffffffffffff
        rax = int(gdb.parse_and_eval("$rax")) & 0xffffffffffffffff
        r14 = int(gdb.parse_and_eval("$r14")) & 0xffffffffffffffff
        r12 = int(gdb.parse_and_eval("$r12")) & 0xffffffffffffffff
    except Exception as e:
        print("REGS_GONE %s" % e)
        break
    off = rip - base
    name = dict(SITES).get(off, "?")
    print("=== HIT %d rip=0x%x off=0x%x %s rax=0x%x r14=0x%x r12=0x%x" %
          (hit, rip, off, name, rax, r14, r12))
    try:
        if off in (0x222e99, 0x223402):
            print("  delta(eax)=0x%x u32(r14)=0x%x u32(r14+0x14)=0x%x" %
                  (rax & 0xffffffff,
                   int(gdb.parse_and_eval("*(unsigned int *)0x%x" % r14)),
                   int(gdb.parse_and_eval("*(unsigned int *)0x%x" % (r14 + 0x14)))))
        if off == 0x223452:
            print("  ctx+0x9830=0x%x ctx+0x9838=0x%x" %
                  (int(gdb.parse_and_eval("*(unsigned long *)0x%x" % (r12 + 0x9830))),
                   int(gdb.parse_and_eval("*(unsigned long *)0x%x" % (r12 + 0x9838)))))
    except Exception as e:
        print("  deref_fail %s" % e)
    try:
        print(gdb.execute("bt 10", to_string=True))
    except Exception as e:
        print("bt_fail %s" % e)

for t in gdb.selected_inferior().threads():
    t.switch()
    print("== tid %s" % t.num)
    try:
        print(gdb.execute("bt 6", to_string=True).rstrip())
    except Exception as e:
        print("bt_fail %s" % e)

try:
    gdb.execute("detach")
except Exception:
    pass