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gdb: change thread_info::name to unique_xmalloc_ptr, add helper function

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This started out as changing thread_info::name to a unique_xmalloc_ptr.
That showed that almost all users of that field had the same logic to
get a thread's name: use thread_info::name if non-nullptr, else ask the
target.  Factor out this logic in a new thread_name free function.  Make
the field private (rename to m_name) and add some accessors.

Change-Id: Iebdd95f4cd21fbefc505249bd1d05befc466a2fc
This commit is contained in:
Simon Marchi
2021-09-01 12:19:30 -04:00
parent 7ebaa5f782
commit 25558938d0
6 changed files with 57 additions and 30 deletions
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30
gdb/gdbthread.h
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@@ -235,7 +235,6 @@ class thread_info : public refcounted_object,
{
public:
explicit thread_info (inferior *inf, ptid_t ptid);
~thread_info ();
bool deletable () const;
@@ -286,9 +285,21 @@ public:
/* The inferior this thread belongs to. */
struct inferior *inf;
/* The name of the thread, as specified by the user. This is NULL
if the thread does not have a user-given name. */
char *name = NULL;
/* The user-given name of the thread.
Returns nullptr if the thread does not have a user-given name. */
const char *name () const
{
return m_name.get ();
}
/* Set the user-given name of the thread.
Pass nullptr to clear the name. */
void set_name (gdb::unique_xmalloc_ptr<char> name)
{
m_name = std::move (name);
}
bool executing () const
{ return m_executing; }
@@ -523,6 +534,11 @@ private:
/* State of inferior thread to restore after GDB is done with an inferior
call. See `struct thread_suspend_state'. */
thread_suspend_state m_suspend;
/* The user-given name of the thread.
Nullptr if the thread does not have a user-given name. */
gdb::unique_xmalloc_ptr<char> m_name;
};
using thread_info_resumed_with_pending_wait_status_node
@@ -953,4 +969,10 @@ extern void print_selected_thread_frame (struct ui_out *uiout,
alive anymore. */
extern void thread_select (const char *tidstr, class thread_info *thr);
/* Return THREAD's name.
If THREAD has a user-given name, return it. Otherwise, query the thread's
target to get the name. May return nullptr. */
extern const char *thread_name (thread_info *thread);
#endif /* GDBTHREAD_H */