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# gdb script: break on the libcuda instructions that produce CUDA errors
# 719 (0x2cf) and 999 (0x3e7), then print the stack that led there.
# Run: sudo gdb -p <cdt-pid> -batch -x /tmp/bp999.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
for off in (0x44fb80, 0x44fb6c):
gdb.execute("break *0x%x" % (base + off))
gdb.execute("set pagination off")
gdb.execute("set confirm off")
try:
gdb.execute("continue")
except gdb.error as e:
print("CONTINUE_ERR %s" % e)
print("HIT_OR_EXIT")
try:
print(gdb.execute("bt 16", to_string=True))
except Exception as e:
print("bt_fail %s" % e)
try:
print(gdb.execute("info registers rdi rsi rdx rax rbx rbp rip", to_string=True))
except Exception as e:
print("regs_fail %s" % e)
try:
gdb.execute("detach")
except Exception:
pass
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