CODEWITHSUNDEEP
gdbptrace
DepressedDaniel
DepressedDaniel

Reputation: 286

How can I debug a ptrace tracee?

I'm writing a program that involves controlling a tracee process with ptrace. Of course, there are bugs :) To fix my bugs, I'd like to be able to inspect the tracee's state with gdb. However, gdb -p says:

warning: process X is already traced by process Y

If I just use PTRACE_DETACH, then the tracee will resume executing until I launch gdb, which can destroy the state I'm trying to examine.

Any suggestion for how to examine the runtime state of a ptrace tracee (perhaps with tools other than gdb) is greatly appreciated.

Upvotes: 0

Views: 892

Answers (1)

Employed Russian
Employed Russian

Reputation: 213526

Any suggestion for how to examine the runtime state of a ptrace tracee

One way is have the tracer implement GDB remote debugging protocol. Additional documentation here.

Also this answer shows how to detach a process without resuming it.

Upvotes: 1

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