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2011-09-15 Kevin Pouget <kevin.pouget@st.com>

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PR threads/12628
	* linux-fork.c (checkpoint_command): Disallow checkpointing of
	processes with multiple threads.
	(inf_has_multiple_thread_cb): New function.
	(inf_has_multiple_threads): New function.
This commit is contained in:
Kevin Pouget 2011-09-15 12:47:07 +00:00
parent 2aa483373c
commit 92f6badcc0
2 changed files with 43 additions and 0 deletions
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35
gdb/linux-fork.c
View file

@ -616,6 +616,33 @@ linux_fork_checkpointing_p (int pid)
return (checkpointing_pid == pid);
}
/* Callback for iterate over threads. Used to check whether
the current inferior is multi-threaded. Returns true as soon
as it sees the second thread of the current inferior. */
static int
inf_has_multiple_thread_cb (struct thread_info *tp, void *data)
{
int *count_p = (int *) data;
if (current_inferior ()->pid == ptid_get_pid (tp->ptid))
(*count_p)++;
/* Stop the iteration if multiple threads have been detected. */
return *count_p > 1;
}
/* Return true if the current inferior is multi-threaded. */
static int
inf_has_multiple_threads (void)
{
int count = 0;
iterate_over_threads (inf_has_multiple_thread_cb, &count);
return (count > 1);
}
static void
checkpoint_command (char *args, int from_tty)
{
@ -628,6 +655,14 @@ checkpoint_command (char *args, int from_tty)
pid_t retpid;
struct cleanup *old_chain;
if (!target_has_execution)
error (_("The program is not being run."));
/* Ensure that the inferior is not multithreaded. */
update_thread_list ();
if (inf_has_multiple_threads ())
error (_("checkpoint: can't checkpoint multiple threads."));
/* Make the inferior fork, record its (and gdb's) state. */
if (lookup_minimal_symbol ("fork", NULL, NULL) != NULL)