#include "valprint.h"
#include "jit.h"
#include "xml-syscall.h"
+#include "parser-defs.h"
/* readline include files */
#include "readline/readline.h"
static void ep_skip_leading_whitespace (char **s);
+static void detach_single_step_breakpoints (void);
+
static int single_step_breakpoint_inserted_here_p (struct address_space *,
CORE_ADDR pc);
static void update_global_location_list_nothrow (int);
+static int bpstat_remove_bp_location_callback (struct thread_info *th,
+ void *data);
+
static int is_hardware_watchpoint (const struct breakpoint *bpt);
static int is_watchpoint (const struct breakpoint *bpt);
static void trace_pass_command (char *, int);
+/* Assuming we're creating a static tracepoint, does S look like a
+ static tracepoint marker spec ("-m MARKER_ID")? */
+#define is_marker_spec(s) \
+ (strncmp (s, "-m", 2) == 0 && ((s)[2] == ' ' || (s)[2] == '\t'))
+
/* A reference-counted struct command_line. This lets multiple
breakpoints share a single command list. */
struct counted_command_line
int
is_tracepoint (const struct breakpoint *b)
{
- return (b->type == bp_tracepoint || b->type == bp_fast_tracepoint);
+ return (b->type == bp_tracepoint
+ || b->type == bp_fast_tracepoint
+ || b->type == bp_static_tracepoint);
}
/* A helper function that validsates that COMMANDS are valid for a
if (c->control_type == while_stepping_control)
{
if (b->type == bp_fast_tracepoint)
- error (_("The 'while-stepping' command cannot be used for fast tracepoint"));
+ error (_("\
+The 'while-stepping' command cannot be used for fast tracepoint"));
+ else if (b->type == bp_static_tracepoint)
+ error (_("\
+The 'while-stepping' command cannot be used for static tracepoint"));
if (while_stepping)
error (_("The 'while-stepping' command can be used only once"));
}
}
+/* Return a vector of all the static tracepoints set at ADDR. The
+ caller is responsible for releasing the vector. */
+
+VEC(breakpoint_p) *
+static_tracepoints_here (CORE_ADDR addr)
+{
+ struct breakpoint *b;
+ VEC(breakpoint_p) *found = 0;
+ struct bp_location *loc;
+
+ ALL_BREAKPOINTS (b)
+ if (b->type == bp_static_tracepoint)
+ {
+ for (loc = b->loc; loc; loc = loc->next)
+ if (loc->address == addr)
+ VEC_safe_push(breakpoint_p, found, b);
+ }
+
+ return found;
+}
+
/* Set the command list of B to COMMANDS. If breakpoint is tracepoint,
validate that only allowed commands are included.
*/
int bp_size = 0;
int bptoffset = 0;
+ /* bp_location array has B->OWNER always non-NULL. */
if (b->owner->type == bp_none)
warning (_("reading through apparently deleted breakpoint #%d?"),
b->owner->number);
|| bpt->type == bp_watchpoint);
}
-/* Find the current value of a watchpoint on EXP. Return the value in
- *VALP and *RESULTP and the chain of intermediate and final values
- in *VAL_CHAIN. RESULTP and VAL_CHAIN may be NULL if the caller does
- not need them.
-
- If a memory error occurs while evaluating the expression, *RESULTP will
- be set to NULL. *RESULTP may be a lazy value, if the result could
- not be read from memory. It is used to determine whether a value
- is user-specified (we should watch the whole value) or intermediate
- (we should watch only the bit used to locate the final value).
-
- If the final value, or any intermediate value, could not be read
- from memory, *VALP will be set to NULL. *VAL_CHAIN will still be
- set to any referenced values. *VALP will never be a lazy value.
- This is the value which we store in struct breakpoint.
-
- If VAL_CHAIN is non-NULL, *VAL_CHAIN will be released from the
- value chain. The caller must free the values individually. If
- VAL_CHAIN is NULL, all generated values will be left on the value
- chain. */
-
-static void
-fetch_watchpoint_value (struct expression *exp, struct value **valp,
- struct value **resultp, struct value **val_chain)
-{
- struct value *mark, *new_mark, *result;
- volatile struct gdb_exception ex;
-
- *valp = NULL;
- if (resultp)
- *resultp = NULL;
- if (val_chain)
- *val_chain = NULL;
-
- /* Evaluate the expression. */
- mark = value_mark ();
- result = NULL;
-
- TRY_CATCH (ex, RETURN_MASK_ALL)
- {
- result = evaluate_expression (exp);
- }
- if (ex.reason < 0)
- {
- /* Ignore memory errors, we want watchpoints pointing at
- inaccessible memory to still be created; otherwise, throw the
- error to some higher catcher. */
- switch (ex.error)
- {
- case MEMORY_ERROR:
- break;
- default:
- throw_exception (ex);
- break;
- }
- }
-
- new_mark = value_mark ();
- if (mark == new_mark)
- return;
- if (resultp)
- *resultp = result;
-
- /* Make sure it's not lazy, so that after the target stops again we
- have a non-lazy previous value to compare with. */
- if (result != NULL
- && (!value_lazy (result) || gdb_value_fetch_lazy (result)))
- *valp = result;
-
- if (val_chain)
- {
- /* Return the chain of intermediate values. We use this to
- decide which addresses to watch. */
- *val_chain = new_mark;
- value_release_to_mark (mark);
- }
-}
-
/* Assuming that B is a watchpoint: returns true if the current thread
and its running state are safe to evaluate or update watchpoint B.
Watchpoints on local expressions need to be evaluated in the
}
else if (within_current_scope && b->exp)
{
+ int pc = 0;
struct value *val_chain, *v, *result, *next;
struct program_space *frame_pspace;
- fetch_watchpoint_value (b->exp, &v, &result, &val_chain);
+ fetch_subexp_value (b->exp, &pc, &v, &result, &val_chain);
/* Avoid setting b->val if it's already set. The meaning of
b->val is 'the last value' user saw, and we should update
else if (!within_current_scope)
{
printf_filtered (_("\
-Watchpoint %d deleted because the program has left the block \n\
+Watchpoint %d deleted because the program has left the block\n\
in which its expression is valid.\n"),
b->number);
if (b->related_breakpoint)
static int
should_be_inserted (struct bp_location *bpt)
{
- if (!breakpoint_enabled (bpt->owner))
+ if (bpt->owner == NULL || !breakpoint_enabled (bpt->owner))
return 0;
if (bpt->owner->disposition == disp_del_at_next_stop)
{
val = target_insert_watchpoint (bpt->address,
bpt->length,
- bpt->watchpoint_type);
+ bpt->watchpoint_type,
+ bpt->owner->cond_exp);
/* If trying to set a read-watchpoint, and it turns out it's not
supported, try emulating one with an access watchpoint. */
{
val = target_insert_watchpoint (bpt->address,
bpt->length,
- hw_access);
+ hw_access,
+ bpt->owner->cond_exp);
if (val == 0)
bpt->watchpoint_type = hw_access;
}
if (loc->pspace == pspace)
{
+ /* ALL_BP_LOCATIONS bp_location has LOC->OWNER always non-NULL. */
if (loc->owner->loc == loc)
loc->owner->loc = loc->next;
else
continue;
/* There is no point inserting thread-specific breakpoints if the
- thread no longer exists. */
+ thread no longer exists. ALL_BP_LOCATIONS bp_location has B->OWNER
+ always non-NULL. */
if (b->owner->thread != -1
&& !valid_thread_id (b->owner->thread))
continue;
if (b->inserted)
val |= remove_breakpoint_1 (b, mark_inserted);
}
+
+ /* Detach single-step breakpoints as well. */
+ detach_single_step_breakpoints ();
+
do_cleanups (old_chain);
return val;
}
{
int val;
+ /* B is never in moribund_locations by our callers. */
+ gdb_assert (b->owner != NULL);
+
if (b->owner->enable_state == bp_permanent)
/* Permanent breakpoints cannot be inserted or removed. */
return 0;
else if (b->loc_type == bp_loc_hardware_watchpoint)
{
b->inserted = (is == mark_inserted);
- val = target_remove_watchpoint (b->address, b->length,
- b->watchpoint_type);
+ val = target_remove_watchpoint (b->address, b->length,
+ b->watchpoint_type, b->owner->cond_exp);
/* Failure to remove any of the hardware watchpoints comes here. */
if ((is == mark_uninserted) && (b->inserted))
int ret;
struct cleanup *old_chain;
+ /* B is never in moribund_locations by our callers. */
+ gdb_assert (b->owner != NULL);
+
if (b->owner->enable_state == bp_permanent)
/* Permanent breakpoints cannot be inserted or removed. */
return 0;
ALL_BP_LOCATIONS (bpt, bptp_tmp)
{
+ /* ALL_BP_LOCATIONS bp_location has BPT->OWNER always non-NULL. */
if (bpt->pspace == pspace
&& bpt->owner->enable_state != bp_permanent)
bpt->inserted = 0;
&& bpt->loc_type != bp_loc_hardware_breakpoint)
continue;
+ /* ALL_BP_LOCATIONS bp_location has BPT->OWNER always non-NULL. */
if ((breakpoint_enabled (bpt->owner)
|| bpt->owner->enable_state == bp_permanent)
&& breakpoint_address_match (bpt->pspace->aspace, bpt->address,
&& bpt->loc_type != bp_loc_hardware_breakpoint)
continue;
+ /* ALL_BP_LOCATIONS bp_location has BPT->OWNER always non-NULL. */
if (!breakpoint_enabled (bpt->owner)
&& bpt->owner->enable_state != bp_permanent)
continue;
if (bs->breakpoint_at == NULL)
return PRINT_UNKNOWN;
bl = bs->breakpoint_at;
+
+ /* bl->owner can be NULL if it was a momentary breakpoint
+ which has since been placed into moribund_locations. */
+ if (bl->owner == NULL)
+ return PRINT_UNKNOWN;
b = bl->owner;
stb = ui_out_stream_new (uiout);
struct frame_info *fr;
int within_current_scope;
+ /* BS is built for existing struct breakpoint. */
+ gdb_assert (bs->breakpoint_at != NULL);
+ gdb_assert (bs->breakpoint_at->owner != NULL);
b = bs->breakpoint_at->owner;
/* If this is a local watchpoint, we only want to check if the
call free_all_values. We can't call free_all_values because
we might be in the middle of evaluating a function call. */
+ int pc = 0;
struct value *mark = value_mark ();
struct value *new_val;
- fetch_watchpoint_value (b->exp, &new_val, NULL, NULL);
+ fetch_subexp_value (b->exp, &pc, &new_val, NULL, NULL);
/* We use value_equal_contents instead of value_equal because the latter
coerces an array to a pointer, thus comparing just the address of the
{
struct breakpoint *b = bl->owner;
+ /* BL is from existing struct breakpoint. */
+ gdb_assert (b != NULL);
+
/* By definition, the inferior does not report stops at
tracepoints. */
if (is_tracepoint (b))
static void
bpstat_check_watchpoint (bpstat bs)
{
- const struct bp_location *bl = bs->breakpoint_at;
- struct breakpoint *b = bl->owner;
+ const struct bp_location *bl;
+ struct breakpoint *b;
+
+ /* BS is built for existing struct breakpoint. */
+ bl = bs->breakpoint_at;
+ gdb_assert (bl != NULL);
+ b = bl->owner;
+ gdb_assert (b != NULL);
if (is_watchpoint (b))
{
bpstat_check_breakpoint_conditions (bpstat bs, ptid_t ptid)
{
int thread_id = pid_to_thread_id (ptid);
- const struct bp_location *bl = bs->breakpoint_at;
- struct breakpoint *b = bl->owner;
+ const struct bp_location *bl;
+ struct breakpoint *b;
+
+ /* BS is built for existing struct breakpoint. */
+ bl = bs->breakpoint_at;
+ gdb_assert (bl != NULL);
+ b = bl->owner;
+ gdb_assert (b != NULL);
if (frame_id_p (b->frame_id)
&& !frame_id_eq (b->frame_id, get_stack_frame_id (get_current_frame ())))
return root_bs->next;
}
-\f
-/* Tell what to do about this bpstat. */
-struct bpstat_what
-bpstat_what (bpstat bs)
-{
- /* Classify each bpstat as one of the following. */
- enum class
- {
- /* This bpstat element has no effect on the main_action. */
- no_effect = 0,
-
- /* There was a watchpoint, stop but don't print. */
- wp_silent,
-
- /* There was a watchpoint, stop and print. */
- wp_noisy,
- /* There was a breakpoint but we're not stopping. */
- bp_nostop,
-
- /* There was a breakpoint, stop but don't print. */
- bp_silent,
-
- /* There was a breakpoint, stop and print. */
- bp_noisy,
-
- /* We hit the longjmp breakpoint. */
- long_jump,
+static void
+handle_jit_event (void)
+{
+ struct frame_info *frame;
+ struct gdbarch *gdbarch;
- /* We hit the longjmp_resume breakpoint. */
- long_resume,
+ /* Switch terminal for any messages produced by
+ breakpoint_re_set. */
+ target_terminal_ours_for_output ();
- /* We hit the step_resume breakpoint. */
- step_resume,
+ frame = get_current_frame ();
+ gdbarch = get_frame_arch (frame);
- /* We hit the shared library event breakpoint. */
- shlib_event,
+ jit_event_handler (gdbarch);
- /* We hit the jit event breakpoint. */
- jit_event,
+ target_terminal_inferior ();
+}
- /* This is just used to count how many enums there are. */
- class_last
- };
+/* Prepare WHAT final decision for infrun. */
- /* Here is the table which drives this routine. So that we can
- format it pretty, we define some abbreviations for the
- enum bpstat_what codes. */
-#define kc BPSTAT_WHAT_KEEP_CHECKING
-#define ss BPSTAT_WHAT_STOP_SILENT
-#define sn BPSTAT_WHAT_STOP_NOISY
-#define sgl BPSTAT_WHAT_SINGLE
-#define slr BPSTAT_WHAT_SET_LONGJMP_RESUME
-#define clr BPSTAT_WHAT_CLEAR_LONGJMP_RESUME
-#define sr BPSTAT_WHAT_STEP_RESUME
-#define shl BPSTAT_WHAT_CHECK_SHLIBS
-#define jit BPSTAT_WHAT_CHECK_JIT
-
-/* "Can't happen." Might want to print an error message.
- abort() is not out of the question, but chances are GDB is just
- a bit confused, not unusable. */
-#define err BPSTAT_WHAT_STOP_NOISY
-
- /* Given an old action and a class, come up with a new action. */
- /* One interesting property of this table is that wp_silent is the same
- as bp_silent and wp_noisy is the same as bp_noisy. That is because
- after stopping, the check for whether to step over a breakpoint
- (BPSTAT_WHAT_SINGLE type stuff) is handled in proceed() without
- reference to how we stopped. We retain separate wp_silent and
- bp_silent codes in case we want to change that someday.
-
- Another possibly interesting property of this table is that
- there's a partial ordering, priority-like, of the actions. Once
- you've decided that some action is appropriate, you'll never go
- back and decide something of a lower priority is better. The
- ordering is:
-
- kc < jit clr sgl shl slr sn sr ss
- sgl < jit shl slr sn sr ss
- slr < jit err shl sn sr ss
- clr < jit err shl sn sr ss
- ss < jit shl sn sr
- sn < jit shl sr
- jit < shl sr
- shl < sr
- sr <
-
- What I think this means is that we don't need a damned table
- here. If you just put the rows and columns in the right order,
- it'd look awfully regular. We could simply walk the bpstat list
- and choose the highest priority action we find, with a little
- logic to handle the 'err' cases. */
-
- /* step_resume entries: a step resume breakpoint overrides another
- breakpoint of signal handling (see comment in wait_for_inferior
- at where we set the step_resume breakpoint). */
-
- static const enum bpstat_what_main_action
- table[(int) class_last][(int) BPSTAT_WHAT_LAST] =
- {
- /* old action */
- /* kc ss sn sgl slr clr sr shl jit */
-/* no_effect */ {kc, ss, sn, sgl, slr, clr, sr, shl, jit},
-/* wp_silent */ {ss, ss, sn, ss, ss, ss, sr, shl, jit},
-/* wp_noisy */ {sn, sn, sn, sn, sn, sn, sr, shl, jit},
-/* bp_nostop */ {sgl, ss, sn, sgl, slr, slr, sr, shl, jit},
-/* bp_silent */ {ss, ss, sn, ss, ss, ss, sr, shl, jit},
-/* bp_noisy */ {sn, sn, sn, sn, sn, sn, sr, shl, jit},
-/* long_jump */ {slr, ss, sn, slr, slr, err, sr, shl, jit},
-/* long_resume */ {clr, ss, sn, err, err, err, sr, shl, jit},
-/* step_resume */ {sr, sr, sr, sr, sr, sr, sr, sr, sr },
-/* shlib */ {shl, shl, shl, shl, shl, shl, sr, shl, shl},
-/* jit_event */ {jit, jit, jit, jit, jit, jit, sr, jit, jit}
- };
+/* Decide what infrun needs to do with this bpstat. */
-#undef kc
-#undef ss
-#undef sn
-#undef sgl
-#undef slr
-#undef clr
-#undef err
-#undef sr
-#undef ts
-#undef shl
-#undef jit
- enum bpstat_what_main_action current_action = BPSTAT_WHAT_KEEP_CHECKING;
+struct bpstat_what
+bpstat_what (bpstat bs)
+{
struct bpstat_what retval;
+ /* We need to defer calling `solib_add', as adding new symbols
+ resets breakpoints, which in turn deletes breakpoint locations,
+ and hence may clear unprocessed entries in the BS chain. */
+ int shlib_event = 0;
+ int jit_event = 0;
+ retval.main_action = BPSTAT_WHAT_KEEP_CHECKING;
retval.call_dummy = STOP_NONE;
+
for (; bs != NULL; bs = bs->next)
{
- enum class bs_class = no_effect;
+ /* Extract this BS's action. After processing each BS, we check
+ if its action overrides all we've seem so far. */
+ enum bpstat_what_main_action this_action = BPSTAT_WHAT_KEEP_CHECKING;
+ enum bptype bptype;
+
if (bs->breakpoint_at == NULL)
- /* I suspect this can happen if it was a momentary breakpoint
- which has since been deleted. */
- continue;
- if (bs->breakpoint_at->owner == NULL)
- bs_class = bp_nostop;
+ {
+ /* I suspect this can happen if it was a momentary
+ breakpoint which has since been deleted. */
+ bptype = bp_none;
+ }
+ else if (bs->breakpoint_at->owner == NULL)
+ bptype = bp_none;
else
- switch (bs->breakpoint_at->owner->type)
+ bptype = bs->breakpoint_at->owner->type;
+
+ switch (bptype)
{
case bp_none:
- continue;
-
+ break;
case bp_breakpoint:
case bp_hardware_breakpoint:
case bp_until:
if (bs->stop)
{
if (bs->print)
- bs_class = bp_noisy;
+ this_action = BPSTAT_WHAT_STOP_NOISY;
else
- bs_class = bp_silent;
+ this_action = BPSTAT_WHAT_STOP_SILENT;
}
else
- bs_class = bp_nostop;
+ this_action = BPSTAT_WHAT_SINGLE;
break;
case bp_watchpoint:
case bp_hardware_watchpoint:
if (bs->stop)
{
if (bs->print)
- bs_class = wp_noisy;
+ this_action = BPSTAT_WHAT_STOP_NOISY;
else
- bs_class = wp_silent;
+ this_action = BPSTAT_WHAT_STOP_SILENT;
}
else
- /* There was a watchpoint, but we're not stopping.
- This requires no further action. */
- bs_class = no_effect;
+ {
+ /* There was a watchpoint, but we're not stopping.
+ This requires no further action. */
+ }
break;
case bp_longjmp:
- bs_class = long_jump;
+ this_action = BPSTAT_WHAT_SET_LONGJMP_RESUME;
break;
case bp_longjmp_resume:
- bs_class = long_resume;
+ this_action = BPSTAT_WHAT_CLEAR_LONGJMP_RESUME;
break;
case bp_step_resume:
if (bs->stop)
+ this_action = BPSTAT_WHAT_STEP_RESUME;
+ else
{
- bs_class = step_resume;
+ /* It is for the wrong frame. */
+ this_action = BPSTAT_WHAT_SINGLE;
}
- else
- /* It is for the wrong frame. */
- bs_class = bp_nostop;
break;
case bp_watchpoint_scope:
- bs_class = bp_nostop;
- break;
- case bp_shlib_event:
- bs_class = shlib_event;
- break;
- case bp_jit_event:
- bs_class = jit_event;
- break;
case bp_thread_event:
case bp_overlay_event:
case bp_longjmp_master:
case bp_std_terminate_master:
- bs_class = bp_nostop;
+ this_action = BPSTAT_WHAT_SINGLE;
break;
case bp_catchpoint:
if (bs->stop)
{
if (bs->print)
- bs_class = bp_noisy;
+ this_action = BPSTAT_WHAT_STOP_NOISY;
else
- bs_class = bp_silent;
+ this_action = BPSTAT_WHAT_STOP_SILENT;
}
else
- /* There was a catchpoint, but we're not stopping.
- This requires no further action. */
- bs_class = no_effect;
+ {
+ /* There was a catchpoint, but we're not stopping.
+ This requires no further action. */
+ }
+ break;
+ case bp_shlib_event:
+ shlib_event = 1;
+
+ /* If requested, stop when the dynamic linker notifies GDB
+ of events. This allows the user to get control and place
+ breakpoints in initializer routines for dynamically
+ loaded objects (among other things). */
+ if (stop_on_solib_events)
+ this_action = BPSTAT_WHAT_STOP_NOISY;
+ else
+ this_action = BPSTAT_WHAT_SINGLE;
+ break;
+ case bp_jit_event:
+ jit_event = 1;
+ this_action = BPSTAT_WHAT_SINGLE;
break;
case bp_call_dummy:
/* Make sure the action is stop (silent or noisy),
so infrun.c pops the dummy frame. */
- bs_class = bp_silent;
retval.call_dummy = STOP_STACK_DUMMY;
+ this_action = BPSTAT_WHAT_STOP_SILENT;
break;
case bp_std_terminate:
/* Make sure the action is stop (silent or noisy),
so infrun.c pops the dummy frame. */
- bs_class = bp_silent;
retval.call_dummy = STOP_STD_TERMINATE;
+ this_action = BPSTAT_WHAT_STOP_SILENT;
break;
case bp_tracepoint:
case bp_fast_tracepoint:
+ case bp_static_tracepoint:
/* Tracepoint hits should not be reported back to GDB, and
if one got through somehow, it should have been filtered
out already. */
internal_error (__FILE__, __LINE__,
_("bpstat_what: tracepoint encountered"));
- break;
+ default:
+ internal_error (__FILE__, __LINE__,
+ _("bpstat_what: unhandled bptype %d"), (int) bptype);
}
- current_action = table[(int) bs_class][(int) current_action];
+
+ retval.main_action = max (retval.main_action, this_action);
}
- retval.main_action = current_action;
+
+ if (shlib_event)
+ {
+ if (debug_infrun)
+ fprintf_unfiltered (gdb_stdlog, "bpstat_what: bp_shlib_event\n");
+
+ /* Check for any newly added shared libraries if we're supposed
+ to be adding them automatically. */
+
+ /* Switch terminal for any messages produced by
+ breakpoint_re_set. */
+ target_terminal_ours_for_output ();
+
+#ifdef SOLIB_ADD
+ SOLIB_ADD (NULL, 0, ¤t_target, auto_solib_add);
+#else
+ solib_add (NULL, 0, ¤t_target, auto_solib_add);
+#endif
+
+ target_terminal_inferior ();
+ }
+
+ if (jit_event)
+ {
+ if (debug_infrun)
+ fprintf_unfiltered (gdb_stdlog, "bpstat_what: bp_jit_event\n");
+
+ handle_jit_event ();
+ }
+
return retval;
}
{bp_catchpoint, "catchpoint"},
{bp_tracepoint, "tracepoint"},
{bp_fast_tracepoint, "fast tracepoint"},
+ {bp_static_tracepoint, "static tracepoint"},
{bp_jit_event, "jit events"},
};
case bp_std_terminate_master:
case bp_tracepoint:
case bp_fast_tracepoint:
+ case bp_static_tracepoint:
case bp_jit_event:
if (opts.addressprint)
{
|| (!gdbarch_has_global_breakpoints (target_gdbarch)
&& (number_of_program_spaces () > 1
|| number_of_inferiors () > 1)
+ /* LOC is for existing B, it cannot be in moribund_locations and
+ thus having NULL OWNER. */
&& loc->owner->type != bp_catchpoint)))
{
struct inferior *inf;
ui_out_text (uiout, "\n");
+ if (!part_of_multiple && b->static_trace_marker_id)
+ {
+ gdb_assert (b->type == bp_static_tracepoint);
+
+ ui_out_text (uiout, "\tmarker id is ");
+ ui_out_field_string (uiout, "static-tracepoint-marker-string-id",
+ b->static_trace_marker_id);
+ ui_out_text (uiout, "\n");
+ }
+
if (part_of_multiple && frame_id_p (b->frame_id))
{
annotate_field (6);
static int
watchpoint_locations_match (struct bp_location *loc1, struct bp_location *loc2)
{
+ /* Both of them must not be in moribund_locations. */
+ gdb_assert (loc1->owner != NULL);
+ gdb_assert (loc2->owner != NULL);
+
+ /* If the target can evaluate the condition expression in hardware, then we
+ we need to insert both watchpoints even if they are at the same place.
+ Otherwise the watchpoint will only trigger when the condition of whichever
+ watchpoint was inserted evaluates to true, not giving a chance for GDB to
+ check the condition of the other watchpoint. */
+ if ((loc1->owner->cond_exp
+ && target_can_accel_watchpoint_condition (loc1->address, loc1->length,
+ loc1->watchpoint_type,
+ loc1->owner->cond_exp))
+ || (loc2->owner->cond_exp
+ && target_can_accel_watchpoint_condition (loc2->address, loc2->length,
+ loc2->watchpoint_type,
+ loc2->owner->cond_exp)))
+ return 0;
+
/* Note that this checks the owner's type, not the location's. In
case the target does not support read watchpoints, but does
support access watchpoints, we'll have bp_read_watchpoint
static int
breakpoint_locations_match (struct bp_location *loc1, struct bp_location *loc2)
{
- int hw_point1 = is_hardware_watchpoint (loc1->owner);
- int hw_point2 = is_hardware_watchpoint (loc2->owner);
+ int hw_point1, hw_point2;
+
+ /* Both of them must not be in moribund_locations. */
+ gdb_assert (loc1->owner != NULL);
+ gdb_assert (loc2->owner != NULL);
+
+ hw_point1 = is_hardware_watchpoint (loc1->owner);
+ hw_point2 = is_hardware_watchpoint (loc2->owner);
if (hw_point1 != hw_point2)
return 0;
case bp_catchpoint:
case bp_tracepoint:
case bp_fast_tracepoint:
+ case bp_static_tracepoint:
loc->loc_type = bp_loc_other;
break;
default:
static void free_bp_location (struct bp_location *loc)
{
+ /* Be sure no bpstat's are pointing at it after it's been freed. */
+ /* FIXME, how can we find all bpstat's?
+ We just check stop_bpstat for now. Note that we cannot just
+ remove bpstats pointing at bpt from the stop_bpstat list
+ entirely, as breakpoint commands are associated with the bpstat;
+ if we remove it here, then the later call to
+ bpstat_do_actions (&stop_bpstat);
+ in event-top.c won't do anything, and temporary breakpoints
+ with commands won't work. */
+
+ iterate_over_threads (bpstat_remove_bp_location_callback, loc);
+
if (loc->cond)
xfree (loc->cond);
static void
set_breakpoint_location_function (struct bp_location *loc)
{
+ gdb_assert (loc->owner != NULL);
+
if (loc->owner->type == bp_breakpoint
|| loc->owner->type == bp_hardware_breakpoint
|| is_tracepoint (loc->owner))
ALL_BP_LOCATIONS (loc, locp_tmp)
{
+ /* ALL_BP_LOCATIONS bp_location has LOC->OWNER always non-NULL. */
struct breakpoint *b = loc->owner;
+
/* We apply the check to all breakpoints, including disabled
for those with loc->duplicate set. This is so that when breakpoint
becomes enabled, or the duplicate is removed, gdb will try to insert
ALL_BP_LOCATIONS (loc, locp_tmp)
{
+ /* ALL_BP_LOCATIONS bp_location has LOC->OWNER always non-NULL. */
struct breakpoint *b = loc->owner;
if ((loc->loc_type == bp_loc_hardware_breakpoint
printf_filtered (_(" %d"), b->number);
say_where = 1;
break;
+ case bp_static_tracepoint:
+ if (ui_out_is_mi_like_p (uiout))
+ {
+ say_where = 0;
+ break;
+ }
+ printf_filtered (_("Static tracepoint"));
+ printf_filtered (_(" %d"), b->number);
+ say_where = 1;
+ break;
case bp_until:
case bp_finish:
b->ignore_count = ignore_count;
b->enable_state = enabled ? bp_enabled : bp_disabled;
b->disposition = disposition;
-
b->pspace = sals.sals[0].pspace;
+ if (type == bp_static_tracepoint)
+ {
+ struct static_tracepoint_marker marker;
+
+ if (is_marker_spec (addr_string))
+ {
+ /* We already know the marker exists, otherwise, we
+ wouldn't see a sal for it. */
+ char *p = &addr_string[3];
+ char *endp;
+ char *marker_str;
+ int i;
+
+ while (*p == ' ' || *p == '\t')
+ p++;
+
+ endp = p;
+ while (*endp != ' ' && *endp != '\t' && *endp != '\0')
+ endp++;
+
+ marker_str = savestring (p, endp - p);
+ b->static_trace_marker_id = marker_str;
+
+ printf_filtered (_("Probed static tracepoint marker \"%s\"\n"),
+ b->static_trace_marker_id);
+ }
+ else if (target_static_tracepoint_marker_at (sal.pc, &marker))
+ {
+ b->static_trace_marker_id = xstrdup (marker.str_id);
+ release_static_tracepoint_marker (&marker);
+
+ printf_filtered (_("Probed static tracepoint marker \"%s\"\n"),
+ b->static_trace_marker_id);
+ }
+ else
+ warning (_("\
+Couldn't determine the static tracepoint marker to probe"));
+ }
+
if (enabled && b->pspace->executing_startup
&& (b->type == bp_breakpoint
|| b->type == bp_hardware_breakpoint))
inserted as a breakpoint. If it can't throw an error. */
static void
-breakpoint_sals_to_pc (struct symtabs_and_lines *sals,
- char *address)
+breakpoint_sals_to_pc (struct symtabs_and_lines *sals)
{
int i;
}
}
+/* Decode a static tracepoint marker spec. */
+
+static struct symtabs_and_lines
+decode_static_tracepoint_spec (char **arg_p)
+{
+ VEC(static_tracepoint_marker_p) *markers = NULL;
+ struct symtabs_and_lines sals;
+ struct symtab_and_line sal;
+ struct symbol *sym;
+ struct cleanup *old_chain;
+ char *p = &(*arg_p)[3];
+ char *endp;
+ char *marker_str;
+ int i;
+
+ while (*p == ' ' || *p == '\t')
+ p++;
+
+ endp = p;
+ while (*endp != ' ' && *endp != '\t' && *endp != '\0')
+ endp++;
+
+ marker_str = savestring (p, endp - p);
+ old_chain = make_cleanup (xfree, marker_str);
+
+ markers = target_static_tracepoint_markers_by_strid (marker_str);
+ if (VEC_empty(static_tracepoint_marker_p, markers))
+ error (_("No known static tracepoint marker named %s"), marker_str);
+
+ sals.nelts = VEC_length(static_tracepoint_marker_p, markers);
+ sals.sals = xmalloc (sizeof *sals.sals * sals.nelts);
+
+ for (i = 0; i < sals.nelts; i++)
+ {
+ struct static_tracepoint_marker *marker;
+
+ marker = VEC_index (static_tracepoint_marker_p, markers, i);
+
+ init_sal (&sals.sals[i]);
+
+ sals.sals[i] = find_pc_line (marker->address, 0);
+ sals.sals[i].pc = marker->address;
+
+ release_static_tracepoint_marker (marker);
+ }
+
+ do_cleanups (old_chain);
+
+ *arg_p = endp;
+ return sals;
+}
+
/* Set a breakpoint. This function is shared between CLI and MI
functions for setting a breakpoint. This function has two major
modes of operations, selected by the PARSE_CONDITION_AND_THREAD
create_breakpoint (struct gdbarch *gdbarch,
char *arg, char *cond_string, int thread,
int parse_condition_and_thread,
- int tempflag, int hardwareflag, int traceflag,
+ int tempflag, enum bptype type_wanted,
int ignore_count,
enum auto_boolean pending_break_support,
struct breakpoint_ops *ops,
int i;
int pending = 0;
int not_found = 0;
- enum bptype type_wanted;
int task = 0;
int prev_bkpt_count = breakpoint_count;
parse_args.addr_string_p = &addr_string;
parse_args.not_found_ptr = ¬_found;
+ if (type_wanted == bp_static_tracepoint && is_marker_spec (arg))
+ {
+ int i;
+
+ sals = decode_static_tracepoint_spec (&arg);
+
+ copy_arg = savestring (addr_start, arg - addr_start);
+ addr_string = xcalloc (sals.nelts, sizeof (char **));
+ for (i = 0; i < sals.nelts; i++)
+ addr_string[i] = xstrdup (copy_arg);
+ goto done;
+ }
+
e = catch_exception (uiout, do_captured_parse_breakpoint,
&parse_args, RETURN_MASK_ALL);
return 0;
}
+ done:
+
/* Create a chain of things that always need to be cleaned up. */
old_chain = make_cleanup (null_cleanup, 0);
/* Resolve all line numbers to PC's and verify that the addresses
are ok for the target. */
if (!pending)
- breakpoint_sals_to_pc (&sals, addr_start);
-
- type_wanted = (traceflag
- ? (hardwareflag ? bp_fast_tracepoint : bp_tracepoint)
- : (hardwareflag ? bp_hardware_breakpoint : bp_breakpoint));
+ breakpoint_sals_to_pc (&sals);
/* Fast tracepoints may have additional restrictions on location. */
if (type_wanted == bp_fast_tracepoint)
make_cleanup (xfree, cond_string);
}
}
- create_breakpoints_sal (gdbarch, sals, addr_string, cond_string,
- type_wanted, tempflag ? disp_del : disp_donttouch,
- thread, task, ignore_count, ops, from_tty,
- enabled);
+
+ /* If the user is creating a static tracepoint by marker id
+ (strace -m MARKER_ID), then store the sals index, so that
+ breakpoint_re_set can try to match up which of the newly
+ found markers corresponds to this one, and, don't try to
+ expand multiple locations for each sal, given than SALS
+ already should contain all sals for MARKER_ID. */
+ if (type_wanted == bp_static_tracepoint
+ && is_marker_spec (addr_string[0]))
+ {
+ int i;
+
+ for (i = 0; i < sals.nelts; ++i)
+ {
+ struct symtabs_and_lines expanded;
+ struct breakpoint *tp;
+ struct cleanup *old_chain;
+
+ expanded.nelts = 1;
+ expanded.sals = xmalloc (sizeof (struct symtab_and_line));
+ expanded.sals[0] = sals.sals[i];
+ old_chain = make_cleanup (xfree, expanded.sals);
+
+ create_breakpoint_sal (gdbarch, expanded, addr_string[i],
+ cond_string, type_wanted,
+ tempflag ? disp_del : disp_donttouch,
+ thread, task, ignore_count, ops,
+ from_tty, enabled);
+
+ do_cleanups (old_chain);
+
+ /* Get the tracepoint we just created. */
+ tp = get_breakpoint (breakpoint_count);
+ gdb_assert (tp != NULL);
+
+ /* Given that its possible to have multiple markers with
+ the same string id, if the user is creating a static
+ tracepoint by marker id ("strace -m MARKER_ID"), then
+ store the sals index, so that breakpoint_re_set can
+ try to match up which of the newly found markers
+ corresponds to this one */
+ tp->static_trace_marker_id_idx = i;
+ }
+ }
+ else
+ create_breakpoints_sal (gdbarch, sals, addr_string, cond_string,
+ type_wanted, tempflag ? disp_del : disp_donttouch,
+ thread, task, ignore_count, ops, from_tty,
+ enabled);
}
else
{
static void
break_command_1 (char *arg, int flag, int from_tty)
{
- int hardwareflag = flag & BP_HARDWAREFLAG;
int tempflag = flag & BP_TEMPFLAG;
+ enum bptype type_wanted = (flag & BP_HARDWAREFLAG
+ ? bp_hardware_breakpoint
+ : bp_breakpoint);
create_breakpoint (get_current_arch (),
arg,
NULL, 0, 1 /* parse arg */,
- tempflag, hardwareflag, 0 /* traceflag */,
+ tempflag, type_wanted,
0 /* Ignore count */,
pending_break_support,
NULL /* breakpoint_ops */,
break_command_1 (arg, 0, from_tty);
}
+/* Return non-zero if EXP is verified as constant. Returned zero means EXP is
+ variable. Also the constant detection may fail for some constant
+ expressions and in such case still falsely return zero. */
+static int
+watchpoint_exp_is_const (const struct expression *exp)
+{
+ int i = exp->nelts;
+
+ while (i > 0)
+ {
+ int oplenp, argsp;
+
+ /* We are only interested in the descriptor of each element. */
+ operator_length (exp, i, &oplenp, &argsp);
+ i -= oplenp;
+
+ switch (exp->elts[i].opcode)
+ {
+ case BINOP_ADD:
+ case BINOP_SUB:
+ case BINOP_MUL:
+ case BINOP_DIV:
+ case BINOP_REM:
+ case BINOP_MOD:
+ case BINOP_LSH:
+ case BINOP_RSH:
+ case BINOP_LOGICAL_AND:
+ case BINOP_LOGICAL_OR:
+ case BINOP_BITWISE_AND:
+ case BINOP_BITWISE_IOR:
+ case BINOP_BITWISE_XOR:
+ case BINOP_EQUAL:
+ case BINOP_NOTEQUAL:
+ case BINOP_LESS:
+ case BINOP_GTR:
+ case BINOP_LEQ:
+ case BINOP_GEQ:
+ case BINOP_REPEAT:
+ case BINOP_COMMA:
+ case BINOP_EXP:
+ case BINOP_MIN:
+ case BINOP_MAX:
+ case BINOP_INTDIV:
+ case BINOP_CONCAT:
+ case BINOP_IN:
+ case BINOP_RANGE:
+ case TERNOP_COND:
+ case TERNOP_SLICE:
+ case TERNOP_SLICE_COUNT:
+
+ case OP_LONG:
+ case OP_DOUBLE:
+ case OP_DECFLOAT:
+ case OP_LAST:
+ case OP_COMPLEX:
+ case OP_STRING:
+ case OP_BITSTRING:
+ case OP_ARRAY:
+ case OP_TYPE:
+ case OP_NAME:
+ case OP_OBJC_NSSTRING:
+
+ case UNOP_NEG:
+ case UNOP_LOGICAL_NOT:
+ case UNOP_COMPLEMENT:
+ case UNOP_ADDR:
+ case UNOP_HIGH:
+ /* Unary, binary and ternary operators: We have to check their
+ operands. If they are constant, then so is the result of
+ that operation. For instance, if A and B are determined to be
+ constants, then so is "A + B".
+
+ UNOP_IND is one exception to the rule above, because the value
+ of *ADDR is not necessarily a constant, even when ADDR is. */
+ break;
+
+ case OP_VAR_VALUE:
+ /* Check whether the associated symbol is a constant.
+ We use SYMBOL_CLASS rather than TYPE_CONST because it's
+ possible that a buggy compiler could mark a variable as constant
+ even when it is not, and TYPE_CONST would return true in this
+ case, while SYMBOL_CLASS wouldn't.
+ We also have to check for function symbols because they are
+ always constant. */
+ {
+ struct symbol *s = exp->elts[i + 2].symbol;
+
+ if (SYMBOL_CLASS (s) != LOC_BLOCK
+ && SYMBOL_CLASS (s) != LOC_CONST
+ && SYMBOL_CLASS (s) != LOC_CONST_BYTES)
+ return 0;
+ break;
+ }
+
+ /* The default action is to return 0 because we are using
+ the optimistic approach here: If we don't know something,
+ then it is not a constant. */
+ default:
+ return 0;
+ }
+ }
+
+ return 1;
+}
+
/* accessflag: hw_write: watch write,
hw_read: watch read,
hw_access: watch access (read or write) */
enum bptype bp_type;
int mem_cnt = 0;
int thread = -1;
+ int pc = 0;
/* Make sure that we actually have parameters to parse. */
if (arg != NULL && arg[0] != '\0')
while (exp_end > exp_start && (exp_end[-1] == ' ' || exp_end[-1] == '\t'))
--exp_end;
+ /* Checking if the expression is not constant. */
+ if (watchpoint_exp_is_const (exp))
+ {
+ int len;
+
+ len = exp_end - exp_start;
+ while (len > 0 && isspace (exp_start[len - 1]))
+ len--;
+ error (_("Cannot watch constant value `%.*s'."), len, exp_start);
+ }
+
exp_valid_block = innermost_block;
mark = value_mark ();
- fetch_watchpoint_value (exp, &val, NULL, NULL);
+ fetch_subexp_value (exp, &pc, &val, NULL, NULL);
if (val != NULL)
release_value (val);
}
else if (VALUE_LVAL (v) != not_lval
&& deprecated_value_modifiable (v) == 0)
- return 0; /* ??? What does this represent? */
+ return 0; /* These are values from the history (e.g., $1). */
else if (VALUE_LVAL (v) == lval_register)
- return 0; /* cannot watch a register with a HW watchpoint */
+ return 0; /* Cannot watch a register with a HW watchpoint. */
}
/* The expression itself looks suitable for using a hardware
create_breakpoint (get_current_arch (),
trigger_func_name, cond_string, -1,
0 /* condition and thread are valid. */,
- tempflag, 0, 0,
+ tempflag, bp_breakpoint,
0,
AUTO_BOOLEAN_TRUE /* pending */,
&gnu_v3_exception_catchpoint_ops, from_tty,
{
struct bp_location *a = *(void **) ap;
struct bp_location *b = *(void **) bp;
+ /* A and B come from existing breakpoints having non-NULL OWNER. */
int a_perm = a->owner->enable_state == bp_permanent;
int b_perm = b->owner->enable_state == bp_permanent;
See if there's another location at the same address, in which
case we don't need to remove this one from the target. */
+ /* OLD_LOC comes from existing struct breakpoint. */
if (breakpoint_address_is_meaningful (old_loc->owner))
{
for (loc2p = locp;
rwp_loc_first = NULL;
ALL_BP_LOCATIONS (loc, locp)
{
+ /* ALL_BP_LOCATIONS bp_location has LOC->OWNER always non-NULL. */
struct breakpoint *b = loc->owner;
struct bp_location **loc_first_p;
update_global_location_list (inserting);
}
-/* Clear BPT from a BPS. */
+/* Clear LOC from a BPS. */
static void
-bpstat_remove_breakpoint (bpstat bps, struct breakpoint *bpt)
+bpstat_remove_bp_location (bpstat bps, struct bp_location *loc)
{
bpstat bs;
for (bs = bps; bs; bs = bs->next)
- if (bs->breakpoint_at && bs->breakpoint_at->owner == bpt)
+ if (bs->breakpoint_at == loc)
{
bs->breakpoint_at = NULL;
bs->old_val = NULL;
/* Callback for iterate_over_threads. */
static int
-bpstat_remove_breakpoint_callback (struct thread_info *th, void *data)
+bpstat_remove_bp_location_callback (struct thread_info *th, void *data)
{
- struct breakpoint *bpt = data;
+ struct bp_location *loc = data;
- bpstat_remove_breakpoint (th->stop_bpstat, bpt);
+ bpstat_remove_bp_location (th->stop_bpstat, loc);
return 0;
}
xfree (bpt->exec_pathname);
clean_up_filters (&bpt->syscalls_to_be_caught);
- /* Be sure no bpstat's are pointing at it after it's been freed. */
- /* FIXME, how can we find all bpstat's?
- We just check stop_bpstat for now. Note that we cannot just
- remove bpstats pointing at bpt from the stop_bpstat list
- entirely, as breakpoint commands are associated with the bpstat;
- if we remove it here, then the later call to
- bpstat_do_actions (&stop_bpstat);
- in event-top.c won't do anything, and temporary breakpoints
- with commands won't work. */
-
- iterate_over_threads (bpstat_remove_breakpoint_callback, bpt);
-
/* Now that breakpoint is removed from breakpoint
list, update the global location list. This
will remove locations that used to belong to
return 0;
}
+/* When symbols change, it probably means the sources changed as well,
+ and it might mean the static tracepoint markers are no longer at
+ the same address or line numbers they used to be at last we
+ checked. Losing your static tracepoints whenever you rebuild is
+ undesirable. This function tries to resync/rematch gdb static
+ tracepoints with the markers on the target, for static tracepoints
+ that have not been set by marker id. Static tracepoint that have
+ been set by marker id are reset by marker id in breakpoint_re_set.
+ The heuristic is:
+
+ 1) For a tracepoint set at a specific address, look for a marker at
+ the old PC. If one is found there, assume to be the same marker.
+ If the name / string id of the marker found is different from the
+ previous known name, assume that means the user renamed the marker
+ in the sources, and output a warning.
+
+ 2) For a tracepoint set at a given line number, look for a marker
+ at the new address of the old line number. If one is found there,
+ assume to be the same marker. If the name / string id of the
+ marker found is different from the previous known name, assume that
+ means the user renamed the marker in the sources, and output a
+ warning.
+
+ 3) If a marker is no longer found at the same address or line, it
+ may mean the marker no longer exists. But it may also just mean
+ the code changed a bit. Maybe the user added a few lines of code
+ that made the marker move up or down (in line number terms). Ask
+ the target for info about the marker with the string id as we knew
+ it. If found, update line number and address in the matching
+ static tracepoint. This will get confused if there's more than one
+ marker with the same ID (possible in UST, although unadvised
+ precisely because it confuses tools). */
+
+static struct symtab_and_line
+update_static_tracepoint (struct breakpoint *b, struct symtab_and_line sal)
+{
+ struct static_tracepoint_marker marker;
+ CORE_ADDR pc;
+ int i;
+
+ pc = sal.pc;
+ if (sal.line)
+ find_line_pc (sal.symtab, sal.line, &pc);
+
+ if (target_static_tracepoint_marker_at (pc, &marker))
+ {
+ if (strcmp (b->static_trace_marker_id, marker.str_id) != 0)
+ warning (_("static tracepoint %d changed probed marker from %s to %s"),
+ b->number,
+ b->static_trace_marker_id, marker.str_id);
+
+ xfree (b->static_trace_marker_id);
+ b->static_trace_marker_id = xstrdup (marker.str_id);
+ release_static_tracepoint_marker (&marker);
+
+ return sal;
+ }
+
+ /* Old marker wasn't found on target at lineno. Try looking it up
+ by string ID. */
+ if (!sal.explicit_pc
+ && sal.line != 0
+ && sal.symtab != NULL
+ && b->static_trace_marker_id != NULL)
+ {
+ VEC(static_tracepoint_marker_p) *markers;
+
+ markers
+ = target_static_tracepoint_markers_by_strid (b->static_trace_marker_id);
+
+ if (!VEC_empty(static_tracepoint_marker_p, markers))
+ {
+ struct symtab_and_line sal;
+ struct symbol *sym;
+ struct static_tracepoint_marker *marker;
+
+ marker = VEC_index (static_tracepoint_marker_p, markers, 0);
+
+ xfree (b->static_trace_marker_id);
+ b->static_trace_marker_id = xstrdup (marker->str_id);
+
+ warning (_("marker for static tracepoint %d (%s) not "
+ "found at previous line number"),
+ b->number, b->static_trace_marker_id);
+
+ init_sal (&sal);
+
+ sal.pc = marker->address;
+
+ sal = find_pc_line (marker->address, 0);
+ sym = find_pc_sect_function (marker->address, NULL);
+ ui_out_text (uiout, "Now in ");
+ if (sym)
+ {
+ ui_out_field_string (uiout, "func",
+ SYMBOL_PRINT_NAME (sym));
+ ui_out_text (uiout, " at ");
+ }
+ ui_out_field_string (uiout, "file", sal.symtab->filename);
+ ui_out_text (uiout, ":");
+
+ if (ui_out_is_mi_like_p (uiout))
+ {
+ char *fullname = symtab_to_fullname (sal.symtab);
+
+ if (fullname)
+ ui_out_field_string (uiout, "fullname", fullname);
+ }
+
+ ui_out_field_int (uiout, "line", sal.line);
+ ui_out_text (uiout, "\n");
+
+ b->line_number = sal.line;
+
+ xfree (b->source_file);
+ if (sym)
+ b->source_file = xstrdup (sal.symtab->filename);
+ else
+ b->source_file = NULL;
+
+ xfree (b->addr_string);
+ b->addr_string = xstrprintf ("%s:%d",
+ sal.symtab->filename, b->line_number);
+
+ /* Might be nice to check if function changed, and warn if
+ so. */
+
+ release_static_tracepoint_marker (marker);
+ }
+ }
+ return sal;
+}
+
static void
update_breakpoint_locations (struct breakpoint *b,
struct symtabs_and_lines sals)
update_global_location_list (1);
}
-
/* Reset a breakpoint given it's struct breakpoint * BINT.
The value we return ends up being the return value from catch_errors.
Unused in this case. */
char *s;
struct gdb_exception e;
struct cleanup *cleanups = make_cleanup (null_cleanup, NULL);
+ int marker_spec = 0;
switch (b->type)
{
case bp_hardware_breakpoint:
case bp_tracepoint:
case bp_fast_tracepoint:
+ case bp_static_tracepoint:
/* Do not attempt to re-set breakpoints disabled during startup. */
if (b->enable_state == bp_startup_disabled)
return 0;
save_current_space_and_thread ();
switch_to_program_space_and_thread (b->pspace);
+ marker_spec = b->type == bp_static_tracepoint && is_marker_spec (s);
+
TRY_CATCH (e, RETURN_MASK_ERROR)
{
- sals = decode_line_1 (&s, 1, (struct symtab *) NULL, 0, (char ***) NULL,
- not_found_ptr);
+ if (marker_spec)
+ {
+ sals = decode_static_tracepoint_spec (&s);
+ if (sals.nelts > b->static_trace_marker_id_idx)
+ {
+ sals.sals[0] = sals.sals[b->static_trace_marker_id_idx];
+ sals.nelts = 1;
+ }
+ else
+ error (_("marker %s not found"), b->static_trace_marker_id);
+ }
+ else
+ sals = decode_line_1 (&s, 1, (struct symtab *) NULL, 0, (char ***) NULL,
+ not_found_ptr);
}
if (e.reason < 0)
{
b->condition_not_parsed = 0;
}
+ if (b->type == bp_static_tracepoint && !marker_spec)
+ sals.sals[0] = update_static_tracepoint (b, sals.sals[0]);
+
expanded = expand_line_sal_maybe (sals.sals[0]);
}
case bp_breakpoint:
case bp_tracepoint:
case bp_fast_tracepoint:
+ case bp_static_tracepoint:
case bp_catchpoint:
case bp_hardware_breakpoint:
case bp_watchpoint:
case bp_breakpoint:
case bp_tracepoint:
case bp_fast_tracepoint:
+ case bp_static_tracepoint:
case bp_catchpoint:
case bp_hardware_breakpoint:
case bp_watchpoint:
}
}
+/* Delete software single step breakpoints without removing them from
+ the inferior. This is intended to be used if the inferior's address
+ space where they were inserted is already gone, e.g. after exit or
+ exec. */
+
+void
+cancel_single_step_breakpoints (void)
+{
+ int i;
+
+ for (i = 0; i < 2; i++)
+ if (single_step_breakpoints[i])
+ {
+ xfree (single_step_breakpoints[i]);
+ single_step_breakpoints[i] = NULL;
+ single_step_gdbarch[i] = NULL;
+ }
+}
+
+/* Detach software single-step breakpoints from INFERIOR_PTID without
+ removing them. */
+
+static void
+detach_single_step_breakpoints (void)
+{
+ int i;
+
+ for (i = 0; i < 2; i++)
+ if (single_step_breakpoints[i])
+ target_remove_breakpoint (single_step_gdbarch[i],
+ single_step_breakpoints[i]);
+}
+
/* Check whether a software single-step breakpoint is inserted at PC. */
static int
if (create_breakpoint (get_current_arch (),
arg,
NULL, 0, 1 /* parse arg */,
- 0 /* tempflag */, 0 /* hardwareflag */,
- 1 /* traceflag */,
+ 0 /* tempflag */,
+ bp_tracepoint /* type_wanted */,
0 /* Ignore count */,
pending_break_support,
NULL,
if (create_breakpoint (get_current_arch (),
arg,
NULL, 0, 1 /* parse arg */,
- 0 /* tempflag */, 1 /* hardwareflag */,
- 1 /* traceflag */,
+ 0 /* tempflag */,
+ bp_fast_tracepoint /* type_wanted */,
+ 0 /* Ignore count */,
+ pending_break_support,
+ NULL,
+ from_tty,
+ 1 /* enabled */))
+ set_tracepoint_count (breakpoint_count);
+}
+
+/* strace command implementation. Creates a static tracepoint. */
+
+void
+strace_command (char *arg, int from_tty)
+{
+ if (create_breakpoint (get_current_arch (),
+ arg,
+ NULL, 0, 1 /* parse arg */,
+ 0 /* tempflag */,
+ bp_static_tracepoint /* type_wanted */,
0 /* Ignore count */,
pending_break_support,
NULL,
addr_str,
utp->cond_string, -1, 0 /* parse cond/thread */,
0 /* tempflag */,
- (utp->type == bp_fast_tracepoint) /* hardwareflag */,
- 1 /* traceflag */,
+ utp->type /* type_wanted */,
0 /* Ignore count */,
pending_break_support,
NULL,
{
if (tp->type == bp_fast_tracepoint)
fprintf_unfiltered (fp, "ftrace");
+ if (tp->type == bp_static_tracepoint)
+ fprintf_unfiltered (fp, "strace");
else if (tp->type == bp_tracepoint)
fprintf_unfiltered (fp, "trace");
else if (tp->type == bp_breakpoint && tp->disposition == disp_del)
If a line number is specified, break at start of code for that line.\n\
If a function is specified, break at start of code for that function.\n\
If an address is specified, break at that exact address.\n\
-With no LOCATION, uses current execution address of selected stack frame.\n\
-This is useful for breaking on return to a stack frame.\n\
+With no LOCATION, uses current execution address of the selected\n\
+stack frame. This is useful for breaking on return to a stack frame.\n\
\n\
THREADNUM is the number from \"info threads\".\n\
CONDITION is a boolean expression.\n\
\n\
-Multiple breakpoints at one place are permitted, and useful if conditional.\n\
+Multiple breakpoints at one place are permitted, and useful if their\n\
+conditions are different.\n\
\n\
Do \"help breakpoints\" for info on other commands dealing with breakpoints."
add_com_alias ("en", "enable", class_breakpoint, 1);
- add_abbrev_prefix_cmd ("breakpoints", class_breakpoint, enable_command, _("\
+ add_prefix_cmd ("breakpoints", class_breakpoint, enable_command, _("\
Enable some breakpoints.\n\
Give breakpoint numbers (separated by spaces) as arguments.\n\
This is used to cancel the effect of the \"disable\" command.\n\
is executing in.\n\
\n\
See also the \"delete\" command which clears breakpoints by number."));
+ add_com_alias ("cl", "clear", class_breakpoint, 1);
c = add_com ("break", class_breakpoint, break_command, _("\
Set breakpoint at specified line or function.\n"
Do \"help tracepoints\" for info on other tracepoint commands."));
set_cmd_completer (c, location_completer);
+ c = add_com ("strace", class_breakpoint, strace_command, _("\
+Set a static tracepoint at specified line, function or marker.\n\
+\n\
+strace [LOCATION] [if CONDITION]\n\
+LOCATION may be a line number, function name, \"*\" and an address,\n\
+or -m MARKER_ID.\n\
+If a line number is specified, probe the marker at start of code\n\
+for that line. If a function is specified, probe the marker at start\n\
+of code for that function. If an address is specified, probe the marker\n\
+at that exact address. If a marker id is specified, probe the marker\n\
+with that name. With no LOCATION, uses current execution address of\n\
+the selected stack frame.\n\
+Static tracepoints accept an extra collect action -- ``collect $_sdata''.\n\
+This collects arbitrary user data passed in the probe point call to the\n\
+tracing library. You can inspect it when analyzing the trace buffer,\n\
+by printing the $_sdata variable like any other convenience variable.\n\
+\n\
+CONDITION is a boolean expression.\n\
+\n\
+Multiple tracepoints at one place are permitted, and useful if their\n\
+conditions are different.\n\
+\n\
+Do \"help breakpoints\" for info on other commands dealing with breakpoints.\n\
+Do \"help tracepoints\" for info on other tracepoint commands."));
+ set_cmd_completer (c, location_completer);
+
add_info ("tracepoints", tracepoints_info, _("\
Status of tracepoints, or tracepoint number NUMBER.\n\
Convenience variable \"$tpnum\" contains the number of the\n\
c = add_cmd ("breakpoints", class_breakpoint, save_breakpoints_command, _("\
Save current breakpoint definitions as a script.\n\
-This includes all types of breakpoints (breakpoints, watchpoints, \n\
+This includes all types of breakpoints (breakpoints, watchpoints,\n\
catchpoints, tracepoints). Use the 'source' command in another debug\n\
session to restore them."),
&save_cmdlist);
projects / deliverable / binutils-gdb.git / blobdiff