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Target remote mode fork and exec event support

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This patch implements support for fork and exec events with target remote
mode Linux targets.  For such targets with Linux kernels 2.5.46 and later,
this enables follow-fork-mode, detach-on-fork and fork and exec
catchpoints.

The changes required to implement this included:

 * Don't exit from gdbserver if there are still active inferiors.

 * Allow changing the active process in remote mode.

 * Enable fork and exec events in remote mode.

 * Print "Ending remote debugging" only when disconnecting.

 * Combine remote_kill and extended_remote_kill into a single function
   that can handle the multiple inferior case for target remote.  Also,
   the same thing for remote_mourn and extended_remote_mourn.

 * Enable process-style ptids in target remote.

 * Remove restriction on multiprocess mode in target remote.

gdb/gdbserver/ChangeLog:

	* server.c (process_serial_event): Don't exit from gdbserver
	in remote mode if there are still active inferiors.

gdb/ChangeLog:

	* inferior.c (number_of_live_inferiors): New function.
	(have_live_inferiors): Use number_of_live_inferiors in place
	of duplicate code.
	* inferior.h (number_of_live_inferiors): Declare new function.
	* remote.c (set_general_process): Remove restriction on target
	remote mode.
	(remote_query_supported): Likewise.
	(remote_detach_1): Exit in target remote mode only when there
	is just one live inferior left.
	(remote_disconnect): Unpush the target directly instead of
	calling remote_mourn.
	(remote_kill): Rewrite function to handle both target remote
	and extended-remote.  Call remote_kill_k.
	(remote_kill_k): New function.
	(extended_remote_kill): Delete function.
	(remote_mourn, extended_remote_mourn): Combine functions into
	one, remote_mourn, and enable extended functionality for target
	remote.
	(remote_pid_to_str): Enable "process" style ptid string for
	target remote.
	(remote_supports_multi_process): Remove restriction on target
	remote mode.
This commit is contained in:
Don Breazeal
2015-12-14 11:18:05 -08:00
parent a8f077dc25
commit 8020350c52
6 changed files with 163 additions and 116 deletions
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6
gdb/gdbserver/server.c
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@@ -3959,9 +3959,11 @@ process_serial_event (void)
discard_queued_stop_replies (pid_to_ptid (pid));
write_ok (own_buf);
if (extended_protocol)
if (extended_protocol || target_running ())
{
/* Treat this like a normal program exit. */
/* There is still at least one inferior remaining or
we are in extended mode, so don't terminate gdbserver,
and instead treat this like a normal program exit. */
last_status.kind = TARGET_WAITKIND_EXITED;
last_status.value.integer = 0;
last_ptid = pid_to_ptid (pid);