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gdb.783
gdb-6.6-scheduler_locking-step-sw-watchpoints2....
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File gdb-6.6-scheduler_locking-step-sw-watchpoints2.patch of Package gdb.783
2007-06-25 Jan Kratochvil <jan.kratochvil@redhat.com> * inferior.h (enum resume_step): New definition. (resume): Change STEP parameter type to ENUM RESUME_STEP. * infrun.c (resume): Likewise. Extend debug printing of the STEP parameter. Lock the scheduler only for intentional stepping. (proceed): Replace the variable ONESTEP with tristate RESUME_STEP. Set the third RESUME_STEP state according to BPSTAT_SHOULD_STEP. (currently_stepping): Change the return type to ENUM RESUME_STEP. Return RESUME_STEP_NEEDED if it is just due to BPSTAT_SHOULD_STEP. * linux-nat.c (select_singlestep_lwp_callback): Do not focus on the software watchpoint events. * linux-nat.h (struct lwp_info): Redeclare STEP as ENUM RESUME_STEP. 2007-10-19 Jan Kratochvil <jan.kratochvil@redhat.com> * infrun.c (proceed): RESUME_STEP initialized for non-stepping. RESUME_STEP set according to STEP only at the end of the function. 2008-02-24 Jan Kratochvil <jan.kratochvil@redhat.com> Port to GDB-6.8pre. Index: gdb-7.8.90.20150125/gdb/infrun.c =================================================================== --- gdb-7.8.90.20150125.orig/gdb/infrun.c 2015-01-25 08:36:16.651716159 +0100 +++ gdb-7.8.90.20150125/gdb/infrun.c 2015-01-25 08:36:26.491758571 +0100 @@ -86,7 +86,7 @@ static void follow_inferior_reset_breakp static void set_schedlock_func (char *args, int from_tty, struct cmd_list_element *c); -static int currently_stepping (struct thread_info *tp); +static enum resume_step currently_stepping (struct thread_info *tp); static void xdb_handle_command (char *args, int from_tty); @@ -1998,7 +1998,7 @@ user_visible_resume_ptid (int step) resume_ptid = inferior_ptid; } else if ((scheduler_mode == schedlock_on) - || (scheduler_mode == schedlock_step && step)) + || (scheduler_mode == schedlock_step && step == RESUME_STEP_USER)) { /* User-settable 'scheduler' mode requires solo thread resume. */ resume_ptid = inferior_ptid; @@ -2022,7 +2022,7 @@ user_visible_resume_ptid (int step) STEP nonzero if we should step (zero to continue instead). SIG is the signal to give the inferior (zero for none). */ void -resume (int step, enum gdb_signal sig) +resume (enum resume_step step, enum gdb_signal sig) { struct cleanup *old_cleanups = make_cleanup (resume_cleanups, 0); struct regcache *regcache = get_current_regcache (); @@ -2064,9 +2064,13 @@ resume (int step, enum gdb_signal sig) if (debug_infrun) fprintf_unfiltered (gdb_stdlog, - "infrun: resume (step=%d, signal=%s), " + "infrun: resume (step=%s, signal=%s), " "trap_expected=%d, current thread [%s] at %s\n", - step, gdb_signal_to_symbol_string (sig), + (step == RESUME_STEP_CONTINUE + ? "RESUME_STEP_CONTINUE" + : (step == RESUME_STEP_USER ? "RESUME_STEP_USER" + : "RESUME_STEP_NEEDED")), + gdb_signal_to_symbol_string (sig), tp->control.trap_expected, target_pid_to_str (inferior_ptid), paddress (gdbarch, pc)); @@ -2543,6 +2547,7 @@ proceed (CORE_ADDR addr, enum gdb_signal struct thread_info *tp; CORE_ADDR pc; struct address_space *aspace; + enum resume_step resume_step = RESUME_STEP_CONTINUE; /* If we're stopped at a fork/vfork, follow the branch set by the "set follow-fork-mode" command; otherwise, we'll just proceed @@ -2586,13 +2591,19 @@ proceed (CORE_ADDR addr, enum gdb_signal Note, we don't do this in reverse, because we won't actually be executing the breakpoint insn anyway. We'll be (un-)executing the previous instruction. */ + { tp->stepping_over_breakpoint = 1; + resume_step = RESUME_STEP_USER; + } else if (gdbarch_single_step_through_delay_p (gdbarch) && gdbarch_single_step_through_delay (gdbarch, get_current_frame ())) /* We stepped onto an instruction that needs to be stepped again before re-inserting the breakpoint, do so. */ + { tp->stepping_over_breakpoint = 1; + resume_step = RESUME_STEP_USER; + } } else { @@ -2647,6 +2658,7 @@ proceed (CORE_ADDR addr, enum gdb_signal tp->prev_pc = regcache_read_pc (get_current_regcache ()); switch_to_thread (step_over->ptid); tp = step_over; + resume_step = RESUME_STEP_USER; } } @@ -2699,9 +2711,13 @@ proceed (CORE_ADDR addr, enum gdb_signal correctly when the inferior is stopped. */ tp->prev_pc = regcache_read_pc (get_current_regcache ()); + if (tp->control.trap_expected || step) + resume_step = RESUME_STEP_USER; + if (resume_step == RESUME_STEP_CONTINUE && bpstat_should_step ()) + resume_step = RESUME_STEP_NEEDED; + /* Resume inferior. */ - resume (tp->control.trap_expected || step || bpstat_should_step (), - tp->suspend.stop_signal); + resume (resume_step, tp->suspend.stop_signal); /* Wait for it to stop (if not standalone) and in any case decode why it stopped, and act accordingly. */ @@ -5684,14 +5700,16 @@ switch_back_to_stepped_thread (struct ex /* Is thread TP in the middle of single-stepping? */ -static int +static enum resume_step currently_stepping (struct thread_info *tp) { - return ((tp->control.step_range_end + if ((tp->control.step_range_end && tp->control.step_resume_breakpoint == NULL) - || tp->control.trap_expected - || tp->stepped_breakpoint - || bpstat_should_step ()); + || tp->control.trap_expected) + return RESUME_STEP_USER; + if (bpstat_should_step ()) + return RESUME_STEP_NEEDED; + return RESUME_STEP_CONTINUE; } /* Inferior has stepped into a subroutine call with source code that Index: gdb-7.8.90.20150125/gdb/linux-nat.c =================================================================== --- gdb-7.8.90.20150125.orig/gdb/linux-nat.c 2015-01-25 08:36:16.653716168 +0100 +++ gdb-7.8.90.20150125/gdb/linux-nat.c 2015-01-25 08:36:26.492758576 +0100 @@ -2648,7 +2648,11 @@ static int select_singlestep_lwp_callback (struct lwp_info *lp, void *data) { if (lp->last_resume_kind == resume_step - && lp->status != 0) + && lp->status != 0 + /* We do not focus on software watchpoints as we would not catch + STEPPING_PAST_SINGLESTEP_BREAKPOINT breakpoints in some other thread + as they would remain pending due to `Push back breakpoint for %s'. */ + && lp->step == RESUME_STEP_USER) return 1; else return 0; Index: gdb-7.8.90.20150125/gdb/linux-nat.h =================================================================== --- gdb-7.8.90.20150125.orig/gdb/linux-nat.h 2015-01-25 08:36:16.653716168 +0100 +++ gdb-7.8.90.20150125/gdb/linux-nat.h 2015-01-25 08:36:44.948838126 +0100 @@ -18,6 +18,7 @@ along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include "target.h" +#include "infrun.h" #include <signal.h> @@ -88,8 +89,8 @@ struct lwp_info running and not stepping, this is 0. */ CORE_ADDR stop_pc; - /* Non-zero if we were stepping this LWP. */ - int step; + /* The kind of stepping of this LWP. */ + enum resume_step step; /* The reason the LWP last stopped, if we need to track it (breakpoint, watchpoint, etc.) */ Index: gdb-7.8.90.20150125/gdb/infrun.h =================================================================== --- gdb-7.8.90.20150125.orig/gdb/infrun.h 2015-01-25 08:36:16.654716172 +0100 +++ gdb-7.8.90.20150125/gdb/infrun.h 2015-01-25 08:36:26.493758580 +0100 @@ -92,7 +92,14 @@ extern void proceed (CORE_ADDR, enum gdb /* The `resume' routine should only be called in special circumstances. Normally, use `proceed', which handles a lot of bookkeeping. */ -extern void resume (int, enum gdb_signal); +enum resume_step + { + /* currently_stepping () should return non-zero for non-continue. */ + RESUME_STEP_CONTINUE = 0, + RESUME_STEP_USER, /* Stepping is intentional by the user. */ + RESUME_STEP_NEEDED /* Stepping only for software watchpoints. */ + }; +extern void resume (enum resume_step, enum gdb_signal); /* Return a ptid representing the set of threads that we will proceed, in the perspective of the user/frontend. */ Index: gdb-7.8.90.20150125/gdb/testsuite/gdb.threads/signal-while-stepping-over-bp-other-thread.exp =================================================================== --- gdb-7.8.90.20150125.orig/gdb/testsuite/gdb.threads/signal-while-stepping-over-bp-other-thread.exp 2015-01-25 08:36:16.654716172 +0100 +++ gdb-7.8.90.20150125/gdb/testsuite/gdb.threads/signal-while-stepping-over-bp-other-thread.exp 2015-01-25 08:36:26.493758580 +0100 @@ -97,7 +97,7 @@ gdb_test "set debug infrun 1" gdb_test \ "step" \ - ".*need to step-over.*resume \\(step=1.*signal arrived while stepping over breakpoint.*switching back to stepped thread.*stepped to a different line.*callme.*" \ + ".*need to step-over.*resume \\(step=RESUME_STEP_USER.*signal arrived while stepping over breakpoint.*switching back to stepped thread.*stepped to a different line.*callme.*" \ "step" set cnt_after [get_value "args\[$my_number\]" "get count after step"]
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