diff options
Diffstat (limited to 'gdb/gdbserver/linux-low.c')
| -rw-r--r-- | gdb/gdbserver/linux-low.c | 65 |
1 files changed, 39 insertions, 26 deletions
diff --git a/gdb/gdbserver/linux-low.c b/gdb/gdbserver/linux-low.c index 3d7cfe31b5a..fd46d85ed5a 100644 --- a/gdb/gdbserver/linux-low.c +++ b/gdb/gdbserver/linux-low.c @@ -2082,7 +2082,9 @@ handle_tracepoints (struct lwp_info *lwp) lwp_suspended_decr (lwp); gdb_assert (lwp->suspended == 0); - gdb_assert (!stabilizing_threads || lwp->collecting_fast_tracepoint); + gdb_assert (!stabilizing_threads + || (lwp->collecting_fast_tracepoint + != fast_tpoint_collect_result::not_collecting)); if (tpoint_related_event) { @@ -2094,10 +2096,10 @@ handle_tracepoints (struct lwp_info *lwp) return 0; } -/* Convenience wrapper. Returns true if LWP is presently collecting a - fast tracepoint. */ +/* Convenience wrapper. Returns information about LWP's fast tracepoint + collection status. */ -static int +static fast_tpoint_collect_result linux_fast_tracepoint_collecting (struct lwp_info *lwp, struct fast_tpoint_collect_status *status) { @@ -2105,14 +2107,14 @@ linux_fast_tracepoint_collecting (struct lwp_info *lwp, struct thread_info *thread = get_lwp_thread (lwp); if (the_low_target.get_thread_area == NULL) - return 0; + return fast_tpoint_collect_result::not_collecting; /* Get the thread area address. This is used to recognize which thread is which when tracing with the in-process agent library. We don't read anything from the address, and treat it as opaque; it's the address itself that we assume is unique per-thread. */ if ((*the_low_target.get_thread_area) (lwpid_of (thread), &thread_area) == -1) - return 0; + return fast_tpoint_collect_result::not_collecting; return fast_tracepoint_collecting (thread_area, lwp->stop_pc, status); } @@ -2136,14 +2138,14 @@ maybe_move_out_of_jump_pad (struct lwp_info *lwp, int *wstat) && agent_loaded_p ()) { struct fast_tpoint_collect_status status; - int r; if (debug_threads) debug_printf ("Checking whether LWP %ld needs to move out of the " "jump pad.\n", lwpid_of (current_thread)); - r = linux_fast_tracepoint_collecting (lwp, &status); + fast_tpoint_collect_result r + = linux_fast_tracepoint_collecting (lwp, &status); if (wstat == NULL || (WSTOPSIG (*wstat) != SIGILL @@ -2153,9 +2155,10 @@ maybe_move_out_of_jump_pad (struct lwp_info *lwp, int *wstat) { lwp->collecting_fast_tracepoint = r; - if (r != 0) + if (r != fast_tpoint_collect_result::not_collecting) { - if (r == 1 && lwp->exit_jump_pad_bkpt == NULL) + if (r == fast_tpoint_collect_result::before_insn + && lwp->exit_jump_pad_bkpt == NULL) { /* Haven't executed the original instruction yet. Set breakpoint there, and wait till it's hit, @@ -2181,9 +2184,10 @@ maybe_move_out_of_jump_pad (struct lwp_info *lwp, int *wstat) reporting to GDB. Otherwise, it's an IPA lib bug: just report the signal to GDB, and pray for the best. */ - lwp->collecting_fast_tracepoint = 0; + lwp->collecting_fast_tracepoint + = fast_tpoint_collect_result::not_collecting; - if (r != 0 + if (r != fast_tpoint_collect_result::not_collecting && (status.adjusted_insn_addr <= lwp->stop_pc && lwp->stop_pc < status.adjusted_insn_addr_end)) { @@ -2715,7 +2719,8 @@ linux_wait_for_event_filtered (ptid_t wait_ptid, ptid_t filter_ptid, if (stopping_threads == NOT_STOPPING_THREADS && requested_child->status_pending_p - && requested_child->collecting_fast_tracepoint) + && (requested_child->collecting_fast_tracepoint + != fast_tpoint_collect_result::not_collecting)) { enqueue_one_deferred_signal (requested_child, &requested_child->status_pending); @@ -3467,20 +3472,22 @@ linux_wait_1 (ptid_t ptid, } } - if (event_child->collecting_fast_tracepoint) + if (event_child->collecting_fast_tracepoint + != fast_tpoint_collect_result::not_collecting) { if (debug_threads) debug_printf ("LWP %ld was trying to move out of the jump pad (%d). " "Check if we're already there.\n", lwpid_of (current_thread), - event_child->collecting_fast_tracepoint); + (int) event_child->collecting_fast_tracepoint); trace_event = 1; event_child->collecting_fast_tracepoint = linux_fast_tracepoint_collecting (event_child, NULL); - if (event_child->collecting_fast_tracepoint != 1) + if (event_child->collecting_fast_tracepoint + != fast_tpoint_collect_result::before_insn) { /* No longer need this breakpoint. */ if (event_child->exit_jump_pad_bkpt != NULL) @@ -3507,7 +3514,8 @@ linux_wait_1 (ptid_t ptid, } } - if (event_child->collecting_fast_tracepoint == 0) + if (event_child->collecting_fast_tracepoint + == fast_tpoint_collect_result::not_collecting) { if (debug_threads) debug_printf ("fast tracepoint finished " @@ -4192,7 +4200,8 @@ stuck_in_jump_pad_callback (struct inferior_list_entry *entry, void *data) && (gdb_breakpoint_here (lwp->stop_pc) || lwp->stop_reason == TARGET_STOPPED_BY_WATCHPOINT || thread->last_resume_kind == resume_step) - && linux_fast_tracepoint_collecting (lwp, NULL)); + && (linux_fast_tracepoint_collecting (lwp, NULL) + != fast_tpoint_collect_result::not_collecting)); } static void @@ -4369,7 +4378,8 @@ single_step (struct lwp_info* lwp) static int lwp_signal_can_be_delivered (struct lwp_info *lwp) { - return !lwp->collecting_fast_tracepoint; + return (lwp->collecting_fast_tracepoint + == fast_tpoint_collect_result::not_collecting); } /* Resume execution of LWP. If STEP is nonzero, single-step it. If @@ -4381,7 +4391,6 @@ linux_resume_one_lwp_throw (struct lwp_info *lwp, { struct thread_info *thread = get_lwp_thread (lwp); struct thread_info *saved_thread; - int fast_tp_collecting; int ptrace_request; struct process_info *proc = get_thread_process (thread); @@ -4397,9 +4406,12 @@ linux_resume_one_lwp_throw (struct lwp_info *lwp, gdb_assert (lwp->waitstatus.kind == TARGET_WAITKIND_IGNORE); - fast_tp_collecting = lwp->collecting_fast_tracepoint; + fast_tpoint_collect_result fast_tp_collecting + = lwp->collecting_fast_tracepoint; - gdb_assert (!stabilizing_threads || fast_tp_collecting); + gdb_assert (!stabilizing_threads + || (fast_tp_collecting + != fast_tpoint_collect_result::not_collecting)); /* Cancel actions that rely on GDB not changing the PC (e.g., the user used the "jump" command, or "set $pc = foo"). */ @@ -4455,7 +4467,7 @@ linux_resume_one_lwp_throw (struct lwp_info *lwp, if (can_hardware_single_step ()) { - if (fast_tp_collecting == 0) + if (fast_tp_collecting == fast_tpoint_collect_result::not_collecting) { if (step == 0) warning ("BAD - reinserting but not stepping."); @@ -4468,14 +4480,14 @@ linux_resume_one_lwp_throw (struct lwp_info *lwp, step = maybe_hw_step (thread); } - if (fast_tp_collecting == 1) + if (fast_tp_collecting == fast_tpoint_collect_result::before_insn) { if (debug_threads) debug_printf ("lwp %ld wants to get out of fast tracepoint jump pad" " (exit-jump-pad-bkpt)\n", lwpid_of (thread)); } - else if (fast_tp_collecting == 2) + else if (fast_tp_collecting == fast_tpoint_collect_result::at_insn) { if (debug_threads) debug_printf ("lwp %ld wants to get out of fast tracepoint jump pad" @@ -5294,7 +5306,8 @@ proceed_one_lwp (struct inferior_list_entry *entry, void *except) if (thread->last_resume_kind == resume_stop && lwp->pending_signals_to_report == NULL - && lwp->collecting_fast_tracepoint == 0) + && (lwp->collecting_fast_tracepoint + == fast_tpoint_collect_result::not_collecting)) { /* We haven't reported this LWP as stopped yet (otherwise, the last_status.kind check above would catch it, and we wouldn't |