btrace: Remove btrace disable cleanup
This patch removes a cleanup that disables btrace on threads in case of failure, so we don't leave it enabled for some the threads and disabled for the rest. gdb/ChangeLog: * record-btrace.c (record_btrace_disable_callback): Remove. (struct scoped_btrace_disable): New. (record_btrace_open): Use scoped_btrace_disable.
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@ -1,3 +1,9 @@
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2018-03-06 Simon Marchi <simon.marchi@polymtl.ca>
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* record-btrace.c (record_btrace_disable_callback): Remove.
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(struct scoped_btrace_disable): New.
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(record_btrace_open): Use scoped_btrace_disable.
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2018-03-06 Andrew Burgess <andrew.burgess@embecosm.com>
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* riscv-tdep.c (riscv_return_value): Change type to ULONGEST for
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@ -159,16 +159,6 @@ record_btrace_enable_warn (struct thread_info *tp)
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END_CATCH
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}
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/* Callback function to disable branch tracing for one thread. */
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static void
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record_btrace_disable_callback (void *arg)
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{
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struct thread_info *tp = (struct thread_info *) arg;
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btrace_disable (tp);
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}
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/* Enable automatic tracing of new threads. */
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static void
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@ -223,12 +213,42 @@ record_btrace_push_target (void)
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observer_notify_record_changed (current_inferior (), 1, "btrace", format);
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}
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/* Disable btrace on a set of threads on scope exit. */
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struct scoped_btrace_disable
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{
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scoped_btrace_disable () = default;
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DISABLE_COPY_AND_ASSIGN (scoped_btrace_disable);
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~scoped_btrace_disable ()
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{
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for (thread_info *tp : m_threads)
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btrace_disable (tp);
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}
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void add_thread (thread_info *thread)
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{
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m_threads.push_front (thread);
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}
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void discard ()
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{
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m_threads.clear ();
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}
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private:
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std::forward_list<thread_info *> m_threads;
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};
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/* The to_open method of target record-btrace. */
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static void
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record_btrace_open (const char *args, int from_tty)
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{
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struct cleanup *disable_chain;
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/* If we fail to enable btrace for one thread, disable it for the threads for
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which it was successfully enabled. */
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scoped_btrace_disable btrace_disable;
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struct thread_info *tp;
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DEBUG ("open");
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@ -240,18 +260,17 @@ record_btrace_open (const char *args, int from_tty)
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gdb_assert (record_btrace_thread_observer == NULL);
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disable_chain = make_cleanup (null_cleanup, NULL);
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ALL_NON_EXITED_THREADS (tp)
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if (args == NULL || *args == 0 || number_is_in_list (args, tp->global_num))
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{
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btrace_enable (tp, &record_btrace_conf);
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make_cleanup (record_btrace_disable_callback, tp);
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btrace_disable.add_thread (tp);
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}
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record_btrace_push_target ();
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discard_cleanups (disable_chain);
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btrace_disable.discard ();
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}
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/* The to_stop_recording method of target record-btrace. */
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