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Add $_gthread convenience variable

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This commit adds a new $_gthread convenience variable, that is like
$_thread, but holds the current thread's global thread id.

gdb/ChangeLog:
2016-01-13  Pedro Alves  <palves@redhat.com>

	* NEWS: Mention $_gthread.
	* gdbthread.h (struct thread_info) <global_num>: Mention
	$_gthread.
	* thread.c (thread_num_make_value_helper): New function.
	(thread_id_make_value): Delete.
	(thread_id_per_inf_num_make_value, global_thread_id_make_value):
	New.
	(thread_funcs): Adjust.
	(gthread_funcs): New.
	(_initialize_thread): Register $_gthread variable.

gdb/testsuite/ChangeLog:
2016-01-13  Pedro Alves  <palves@redhat.com>

	* gdb.base/default.exp: Expect $_gthread as well.
	* gdb.multi/tids.exp: Test $_gthread.
	* gdb.threads/thread-specific.exp: Test $_gthread.

gdb/doc/ChangeLog:
2016-01-13  Pedro Alves  <palves@redhat.com>

	* gdb.texinfo (Threads): Document the $_gthread convenience
	variable.
	(Convenience Vars): Likewise.
This commit is contained in:
Pedro Alves
2016-01-13 10:56:10 +00:00
parent c84f6bbfe5
commit 663f6d42f4
10 changed files with 89 additions and 11 deletions
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3
gdb/gdbthread.h
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@@ -217,7 +217,8 @@ struct thread_info
thread has its own unique global ID. */
/* The thread's global GDB thread number. This is exposed to MI,
Python/Scheme and visible with "info threads -gid". */
Python/Scheme, visible with "info threads -gid", and is also what
the $_gthread convenience variable is bound to. */
int global_num;
/* The per-inferior thread number. This is unique in the inferior