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* Makefile.in (infrun.o): Add $(gdb_assert_h).

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* infrun.c: Include "gdb_assert.h".
	(singlestep_ptid, saved_singlestep_ptid)
	(stepping_past_singlestep_breakpoint): New variables.
	(resume): Set singlestep_ptid.  Check for singlestep thread
	hop.
	(init_wait_for_inferior): Clear stepping_past_singlestep_breakpoint.
	(handle_inferior_event): Handle singlestep thread hop.
This commit is contained in:
Daniel Jacobowitz 2004-02-16 20:49:51 +00:00
parent f090b9b105
commit 9f976b41d7
3 changed files with 86 additions and 3 deletions
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11
gdb/ChangeLog
View File

@ -1,3 +1,14 @@
2004-02-16 Daniel Jacobowitz <drow@mvista.com>
* Makefile.in (infrun.o): Add $(gdb_assert_h).
* infrun.c: Include "gdb_assert.h".
(singlestep_ptid, saved_singlestep_ptid)
(stepping_past_singlestep_breakpoint): New variables.
(resume): Set singlestep_ptid. Check for singlestep thread
hop.
(init_wait_for_inferior): Clear stepping_past_singlestep_breakpoint.
(handle_inferior_event): Handle singlestep thread hop.
2004-02-16 Andrew Cagney <cagney@redhat.com>
* dwarf2-frame.c (dwarf2_frame_ops): New function.

2
gdb/Makefile.in
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@ -1851,7 +1851,7 @@ infrun.o: infrun.c $(defs_h) $(gdb_string_h) $(symtab_h) $(frame_h) \
$(inferior_h) $(breakpoint_h) $(gdb_wait_h) $(gdbcore_h) $(gdbcmd_h) \
$(cli_script_h) $(target_h) $(gdbthread_h) $(annotate_h) \
$(symfile_h) $(top_h) $(inf_loop_h) $(regcache_h) $(value_h) \
$(observer_h) $(language_h)
$(observer_h) $(language_h) $(gdb_assert_h)
inftarg.o: inftarg.c $(defs_h) $(frame_h) $(inferior_h) $(target_h) \
$(gdbcore_h) $(command_h) $(gdb_stat_h) $(gdb_wait_h) $(inflow_h)
infttrace.o: infttrace.c $(defs_h) $(frame_h) $(inferior_h) $(target_h) \

76
gdb/infrun.c
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@ -44,6 +44,7 @@
#include "value.h"
#include "observer.h"
#include "language.h"
#include "gdb_assert.h"
/* Prototypes for local functions */
@ -474,6 +475,14 @@ follow_exec (int pid, char *execd_pathname)
because we cannot remove the breakpoints in the inferior process
until after the `wait' in `wait_for_inferior'. */
static int singlestep_breakpoints_inserted_p = 0;
/* The thread we inserted single-step breakpoints for. */
static ptid_t singlestep_ptid;
/* If another thread hit the singlestep breakpoint, we save the original
thread here so that we can resume single-stepping it later. */
static ptid_t saved_singlestep_ptid;
static int stepping_past_singlestep_breakpoint;
/* Things to clean up if we QUIT out of resume (). */
@ -560,6 +569,7 @@ resume (int step, enum target_signal sig)
/* and do not pull these breakpoints until after a `wait' in
`wait_for_inferior' */
singlestep_breakpoints_inserted_p = 1;
singlestep_ptid = inferior_ptid;
}
/* Handle any optimized stores to the inferior NOW... */
@ -597,7 +607,8 @@ resume (int step, enum target_signal sig)
resume_ptid = RESUME_ALL; /* Default */
if ((step || singlestep_breakpoints_inserted_p) &&
!breakpoints_inserted && breakpoint_here_p (read_pc ()))
(stepping_past_singlestep_breakpoint
|| (!breakpoints_inserted && breakpoint_here_p (read_pc ()))))
{
/* Stepping past a breakpoint without inserting breakpoints.
Make sure only the current thread gets to step, so that
@ -896,6 +907,8 @@ init_wait_for_inferior (void)
number_of_threads_in_syscalls = 0;
clear_proceed_status ();
stepping_past_singlestep_breakpoint = 0;
}
static void
@ -1739,12 +1752,46 @@ handle_inferior_event (struct execution_control_state *ecs)
stop_pc = read_pc_pid (ecs->ptid);
if (stepping_past_singlestep_breakpoint)
{
gdb_assert (SOFTWARE_SINGLE_STEP_P () && singlestep_breakpoints_inserted_p);
gdb_assert (ptid_equal (singlestep_ptid, ecs->ptid));
gdb_assert (!ptid_equal (singlestep_ptid, saved_singlestep_ptid));
stepping_past_singlestep_breakpoint = 0;
/* We've either finished single-stepping past the single-step
breakpoint, or stopped for some other reason. It would be nice if
we could tell, but we can't reliably. */
if (stop_signal == TARGET_SIGNAL_TRAP)
{
/* Pull the single step breakpoints out of the target. */
SOFTWARE_SINGLE_STEP (0, 0);
singlestep_breakpoints_inserted_p = 0;
ecs->random_signal = 0;
ecs->ptid = saved_singlestep_ptid;
context_switch (ecs);
if (context_hook)
context_hook (pid_to_thread_id (ecs->ptid));
resume (1, TARGET_SIGNAL_0);
prepare_to_wait (ecs);
return;
}
}
stepping_past_singlestep_breakpoint = 0;
/* See if a thread hit a thread-specific breakpoint that was meant for
another thread. If so, then step that thread past the breakpoint,
and continue it. */
if (stop_signal == TARGET_SIGNAL_TRAP)
{
int thread_hop_needed = 0;
/* Check if a regular breakpoint has been hit before checking
for a potential single step breakpoint. Otherwise, GDB will
not see this breakpoint hit when stepping onto breakpoints. */
@ -1752,12 +1799,38 @@ handle_inferior_event (struct execution_control_state *ecs)
{
ecs->random_signal = 0;
if (!breakpoint_thread_match (stop_pc, ecs->ptid))
thread_hop_needed = 1;
}
else if (SOFTWARE_SINGLE_STEP_P () && singlestep_breakpoints_inserted_p)
{
ecs->random_signal = 0;
/* The call to in_thread_list is necessary because PTIDs sometimes
change when we go from single-threaded to multi-threaded. If
the singlestep_ptid is still in the list, assume that it is
really different from ecs->ptid. */
if (!ptid_equal (singlestep_ptid, ecs->ptid)
&& in_thread_list (singlestep_ptid))
{
thread_hop_needed = 1;
stepping_past_singlestep_breakpoint = 1;
saved_singlestep_ptid = singlestep_ptid;
}
}
if (thread_hop_needed)
{
int remove_status;
/* Saw a breakpoint, but it was hit by the wrong thread.
Just continue. */
if (SOFTWARE_SINGLE_STEP_P () && singlestep_breakpoints_inserted_p)
{
/* Pull the single step breakpoints out of the target. */
SOFTWARE_SINGLE_STEP (0, 0);
singlestep_breakpoints_inserted_p = 0;
}
remove_status = remove_breakpoints ();
/* Did we fail to remove breakpoints? If so, try
to set the PC past the bp. (There's at least
@ -1799,7 +1872,6 @@ handle_inferior_event (struct execution_control_state *ecs)
registers_changed ();
return;
}
}
}
else if (SOFTWARE_SINGLE_STEP_P () && singlestep_breakpoints_inserted_p)
{