/* Everything about breakpoints, for GDB.
- Copyright (C) 1986-2019 Free Software Foundation, Inc.
+ Copyright (C) 1986-2020 Free Software Foundation, Inc.
This file is part of GDB.
static int watchpoint_locations_match (struct bp_location *loc1,
struct bp_location *loc2);
+static int breakpoint_locations_match (struct bp_location *loc1,
+ struct bp_location *loc2,
+ bool sw_hw_bps_match = false);
+
static int breakpoint_location_address_match (struct bp_location *bl,
const struct address_space *aspace,
CORE_ADDR addr);
/* Breakpoints set on probes. */
static struct breakpoint_ops bkpt_probe_breakpoint_ops;
+/* Tracepoints set on probes. */
+static struct breakpoint_ops tracepoint_probe_breakpoint_ops;
+
/* Dynamic printf class type. */
struct breakpoint_ops dprintf_breakpoint_ops;
no threads under GDB's control yet. */
return 1;
}
- else if (target_has_execution)
+ else
{
if (always_inserted_mode)
{
return 1;
}
- if (threads_are_executing ())
- return 1;
+ for (inferior *inf : all_inferiors ())
+ if (inf->has_execution ()
+ && threads_are_executing (inf->process_target ()))
+ return 1;
/* Don't remove breakpoints yet if, even though all threads are
stopped, we still have events to process. */
static struct breakpoint *breakpoint_chain;
-/* Array is sorted by bp_locations_compare - primarily by the ADDRESS. */
+/* Array is sorted by bp_location_is_less_than - primarily by the ADDRESS. */
static struct bp_location **bp_locations;
/* A comparison function for bp_location AP and BP that is used by
bsearch. This comparison function only cares about addresses, unlike
- the more general bp_locations_compare function. */
+ the more general bp_location_is_less_than function. */
static int
bp_locations_compare_addrs (const void *ap, const void *bp)
for it explicitly, never if they just happen to
appear in the middle of some value chain. */
if (v == result
- || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
- && TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
+ || (vtype->code () != TYPE_CODE_STRUCT
+ && vtype->code () != TYPE_CODE_ARRAY))
{
CORE_ADDR addr;
enum target_hw_bp_type type;
return;
/* Do a first pass to check for locations with no assigned
- conditions or conditions that fail to parse to a valid agent expression
- bytecode. If any of these happen, then it's no use to send conditions
- to the target since this location will always trigger and generate a
- response back to GDB. */
+ conditions or conditions that fail to parse to a valid agent
+ expression bytecode. If any of these happen, then it's no use to
+ send conditions to the target since this location will always
+ trigger and generate a response back to GDB. Note we consider
+ all locations at the same address irrespective of type, i.e.,
+ even if the locations aren't considered duplicates (e.g.,
+ software breakpoint and hardware breakpoint at the same
+ address). */
ALL_BP_LOCATIONS_AT_ADDR (loc2p, locp, bl->address)
{
loc = (*loc2p);
}
}
- /* No NULL conditions or failed bytecode generation. Build a condition list
- for this location's address. */
+ /* No NULL conditions or failed bytecode generation. Build a
+ condition list for this location's address. If we have software
+ and hardware locations at the same address, they aren't
+ considered duplicates, but we still marge all the conditions
+ anyway, as it's simpler, and doesn't really make a practical
+ difference. */
ALL_BP_LOCATIONS_AT_ADDR (loc2p, locp, bl->address)
{
loc = (*loc2p);
if (dprintf_style != dprintf_style_agent)
return;
- /* For now, if we have any duplicate location that isn't a dprintf,
- don't install the target-side commands, as that would make the
- breakpoint not be reported to the core, and we'd lose
+ /* For now, if we have any location at the same address that isn't a
+ dprintf, don't install the target-side commands, as that would
+ make the breakpoint not be reported to the core, and we'd lose
control. */
ALL_BP_LOCATIONS_AT_ADDR (loc2p, locp, bl->address)
{
}
}
- /* No NULL commands or failed bytecode generation. Build a command list
- for this location's address. */
+ /* No NULL commands or failed bytecode generation. Build a command
+ list for all duplicate locations at this location's address.
+ Note that here we must care for whether the breakpoint location
+ types are considered duplicates, otherwise, say, if we have a
+ software and hardware location at the same address, the target
+ could end up running the commands twice. For the moment, we only
+ support targets-side commands with dprintf, but it doesn't hurt
+ to be pedantically correct in case that changes. */
ALL_BP_LOCATIONS_AT_ADDR (loc2p, locp, bl->address)
{
loc = (*loc2p);
- if (loc->owner->extra_string
+ if (breakpoint_locations_match (bl, loc)
+ && loc->owner->extra_string
&& is_breakpoint (loc->owner)
&& loc->pspace->num == bl->pspace->num
&& loc->owner->enable_state == bp_enabled
bl->needs_update = 0;
}
+ /* If "set breakpoint auto-hw" is "on" and a software breakpoint was
+ set at a read-only address, then a breakpoint location will have
+ been changed to hardware breakpoint before we get here. If it is
+ "off" however, error out before actually trying to insert the
+ breakpoint, with a nicer error message. */
if (bl->loc_type == bp_loc_software_breakpoint
- || bl->loc_type == bp_loc_hardware_breakpoint)
+ && !automatic_hardware_breakpoints)
{
- if (bl->owner->type != bp_hardware_breakpoint)
- {
- /* If the explicitly specified breakpoint type
- is not hardware breakpoint, check the memory map to see
- if the breakpoint address is in read only memory or not.
-
- Two important cases are:
- - location type is not hardware breakpoint, memory
- is readonly. We change the type of the location to
- hardware breakpoint.
- - location type is hardware breakpoint, memory is
- read-write. This means we've previously made the
- location hardware one, but then the memory map changed,
- so we undo.
-
- When breakpoints are removed, remove_breakpoints will use
- location types we've just set here, the only possible
- problem is that memory map has changed during running
- program, but it's not going to work anyway with current
- gdb. */
- struct mem_region *mr
- = lookup_mem_region (bl->target_info.reqstd_address);
-
- if (mr)
- {
- if (automatic_hardware_breakpoints)
- {
- enum bp_loc_type new_type;
-
- if (mr->attrib.mode != MEM_RW)
- new_type = bp_loc_hardware_breakpoint;
- else
- new_type = bp_loc_software_breakpoint;
-
- if (new_type != bl->loc_type)
- {
- static int said = 0;
+ mem_region *mr = lookup_mem_region (bl->address);
- bl->loc_type = new_type;
- if (!said)
- {
- fprintf_filtered (gdb_stdout,
- _("Note: automatically using "
- "hardware breakpoints for "
- "read-only addresses.\n"));
- said = 1;
- }
- }
- }
- else if (bl->loc_type == bp_loc_software_breakpoint
- && mr->attrib.mode != MEM_RW)
- {
- fprintf_unfiltered (tmp_error_stream,
- _("Cannot insert breakpoint %d.\n"
- "Cannot set software breakpoint "
- "at read-only address %s\n"),
- bl->owner->number,
- paddress (bl->gdbarch, bl->address));
- return 1;
- }
- }
+ if (mr != nullptr && mr->attrib.mode != MEM_RW)
+ {
+ fprintf_unfiltered (tmp_error_stream,
+ _("Cannot insert breakpoint %d.\n"
+ "Cannot set software breakpoint "
+ "at read-only address %s\n"),
+ bl->owner->number,
+ paddress (bl->gdbarch, bl->address));
+ return 1;
}
-
+ }
+
+ if (bl->loc_type == bp_loc_software_breakpoint
+ || bl->loc_type == bp_loc_hardware_breakpoint)
+ {
/* First check to see if we have to handle an overlay. */
if (overlay_debugging == ovly_off
|| bl->section == NULL
/* Updating watchpoints creates new locations, so update the global
location list. Explicitly tell ugll to insert locations and
- ignore breakpoints_always_inserted_mode. */
+ ignore breakpoints_always_inserted_mode. Also,
+ update_global_location_list tries to "upgrade" software
+ breakpoints to hardware breakpoints to handle "set breakpoint
+ auto-hw", so we need to call it even if we don't have new
+ locations. */
update_global_location_list (UGLL_INSERT);
}
if we aren't attached to any process yet, we should still
insert breakpoints. */
if (!gdbarch_has_global_breakpoints (target_gdbarch ())
- && inferior_ptid == null_ptid)
+ && (inferior_ptid == null_ptid || !target_has_execution))
continue;
val = insert_bp_location (bl, &tmp_error_stream, &disabled_breaks,
if we aren't attached to any process yet, we should still
insert breakpoints. */
if (!gdbarch_has_global_breakpoints (target_gdbarch ())
- && inferior_ptid == null_ptid)
+ && (inferior_ptid == null_ptid || !target_has_execution))
continue;
val = insert_bp_location (bl, &tmp_error_stream, &disabled_breaks,
}
addr = BMSYMBOL_VALUE_ADDRESS (bp_objfile_data->overlay_msym);
- b = create_internal_breakpoint (get_objfile_arch (objfile), addr,
+ b = create_internal_breakpoint (objfile->arch (), addr,
bp_overlay_event,
&internal_breakpoint_ops);
initialize_explicit_location (&explicit_loc);
static void
create_longjmp_master_breakpoint (void)
{
- struct program_space *pspace;
-
scoped_restore_current_program_space restore_pspace;
- ALL_PSPACES (pspace)
- {
- set_current_program_space (pspace);
+ for (struct program_space *pspace : program_spaces)
+ {
+ set_current_program_space (pspace);
- for (objfile *objfile : current_program_space->objfiles ())
- {
- int i;
- struct gdbarch *gdbarch;
- struct breakpoint_objfile_data *bp_objfile_data;
+ for (objfile *objfile : current_program_space->objfiles ())
+ {
+ int i;
+ struct gdbarch *gdbarch;
+ struct breakpoint_objfile_data *bp_objfile_data;
- gdbarch = get_objfile_arch (objfile);
+ gdbarch = objfile->arch ();
- bp_objfile_data = get_breakpoint_objfile_data (objfile);
+ bp_objfile_data = get_breakpoint_objfile_data (objfile);
- if (!bp_objfile_data->longjmp_searched)
- {
- std::vector<probe *> ret
- = find_probes_in_objfile (objfile, "libc", "longjmp");
+ if (!bp_objfile_data->longjmp_searched)
+ {
+
std::vector<probe *> ret
+ = find_probes_in_objfile (objfile, "libc", "longjmp");
- if (!ret.empty ())
- {
- /* We are only interested in checking one element. */
- probe *p = ret[0];
+ if (!ret.empty ())
+ {
+ /* We are only interested in checking one element. */
+ probe *p = ret[0];
- if (!p->can_evaluate_arguments ())
- {
- /* We cannot use the probe interface here, because it does
- not know how to evaluate arguments. */
- ret.clear ();
- }
- }
- bp_objfile_data->longjmp_probes = ret;
- bp_objfile_data->longjmp_searched = 1;
- }
+ if (!p->can_evaluate_arguments ())
+ {
+ /* We cannot use the probe interface here,
+ because it does not know how to evaluate
+ arguments. */
+ ret.clear ();
+ }
+ }
+ bp_objfile_data->longjmp_probes = ret;
+ bp_objfile_data->longjmp_searched = 1;
+ }
- if (!bp_objfile_data->longjmp_probes.empty ())
- {
- for (probe *p : bp_objfile_data->longjmp_probes)
- {
- struct breakpoint *b;
-
- b = create_internal_breakpoint (gdbarch,
- p->get_relocated_address (objfile),
- bp_longjmp_master,
- &internal_breakpoint_ops);
- b->location = new_probe_location ("-probe-stap libc:longjmp");
- b->enable_state = bp_disabled;
- }
+ if (!bp_objfile_data->longjmp_probes.empty ())
+ {
+ for (probe *p : bp_objfile_data->longjmp_probes)
+ {
+ struct breakpoint *b;
+
+ b = create_internal_breakpoint (gdbarch,
+ p->get_relocated_address (objfile),
+ bp_longjmp_master,
+ &internal_breakpoint_ops);
+ b->location = new_probe_location ("-probe-stap libc:longjmp");
+ b->enable_state = bp_disabled;
+ }
- continue;
- }
+ continue;
+ }
- if (!gdbarch_get_longjmp_target_p (gdbarch))
- continue;
+ if (!gdbarch_get_longjmp_target_p (gdbarch))
+ continue;
- for (i = 0; i < NUM_LONGJMP_NAMES; i++)
- {
- struct breakpoint *b;
- const char *func_name;
- CORE_ADDR addr;
- struct explicit_location explicit_loc;
+ for (i = 0; i < NUM_LONGJMP_NAMES; i++)
+ {
+ struct breakpoint *b;
+ const char *func_name;
+ CORE_ADDR addr;
+ struct explicit_location explicit_loc;
- if (msym_not_found_p (bp_objfile_data->longjmp_msym[i].minsym))
- continue;
+ if (msym_not_found_p (bp_objfile_data->longjmp_msym[i].minsym))
+ continue;
- func_name = longjmp_names[i];
- if (bp_objfile_data->longjmp_msym[i].minsym == NULL)
- {
- struct bound_minimal_symbol m;
+ func_name = longjmp_names[i];
+ if (bp_objfile_data->longjmp_msym[i].minsym == NULL)
+ {
+ struct bound_minimal_symbol m;
- m = lookup_minimal_symbol_text (func_name, objfile);
- if (m.minsym == NULL)
- {
- /* Prevent future lookups in this objfile. */
- bp_objfile_data->longjmp_msym[i].minsym = &msym_not_found;
- continue;
- }
- bp_objfile_data->longjmp_msym[i] = m;
- }
+ m = lookup_minimal_symbol_text (func_name, objfile);
+ if (m.minsym == NULL)
+ {
+ /* Prevent future lookups in this objfile. */
+ bp_objfile_data->longjmp_msym[i].minsym = &msym_not_found;
+ continue;
+ }
+ bp_objfile_data->longjmp_msym[i] = m;
+ }
- addr = BMSYMBOL_VALUE_ADDRESS (bp_objfile_data->longjmp_msym[i]);
- b = create_internal_breakpoint (gdbarch, addr, bp_longjmp_master,
- &internal_breakpoint_ops);
- initialize_explicit_location (&explicit_loc);
- explicit_loc.function_name = ASTRDUP (func_name);
- b->location = new_explicit_location (&explicit_loc);
- b->enable_state = bp_disabled;
- }
- }
- }
+ addr = BMSYMBOL_VALUE_ADDRESS (bp_objfile_data->longjmp_msym[i]);
+ b = create_internal_breakpoint (gdbarch, addr, bp_longjmp_master,
+ &internal_breakpoint_ops);
+ initialize_explicit_location (&explicit_loc);
+ explicit_loc.function_name = ASTRDUP (func_name);
+ b->location = new_explicit_location (&explicit_loc);
+ b->enable_state = bp_disabled;
+ }
+ }
+ }
}
/* Create a master std::terminate breakpoint. */
static void
create_std_terminate_master_breakpoint (void)
{
- struct program_space *pspace;
const char *const func_name = "std::terminate()";
scoped_restore_current_program_space restore_pspace;
- ALL_PSPACES (pspace)
- {
- CORE_ADDR addr;
+ for (struct program_space *pspace : program_spaces)
+ {
+ CORE_ADDR addr;
- set_current_program_space (pspace);
+ set_current_program_space (pspace);
- for (objfile *objfile : current_program_space->objfiles ())
- {
- struct breakpoint *b;
- struct breakpoint_objfile_data *bp_objfile_data;
- struct explicit_location explicit_loc;
+ for (objfile *objfile : current_program_space->objfiles ())
+ {
+ struct breakpoint *b;
+ struct breakpoint_objfile_data *bp_objfile_data;
+ struct explicit_location explicit_loc;
- bp_objfile_data = get_breakpoint_objfile_data (objfile);
+ bp_objfile_data = get_breakpoint_objfile_data (objfile);
- if (msym_not_found_p (bp_objfile_data->terminate_msym.minsym))
- continue;
+ if (msym_not_found_p (bp_objfile_data->terminate_msym.minsym))
+ continue;
- if (bp_objfile_data->terminate_msym.minsym == NULL)
- {
- struct bound_minimal_symbol m;
+ if (bp_objfile_data->terminate_msym.minsym == NULL)
+ {
+ struct bound_minimal_symbol m;
- m = lookup_minimal_symbol (func_name, NULL, objfile);
- if (m.minsym == NULL || (MSYMBOL_TYPE (m.minsym) != mst_text
- && MSYMBOL_TYPE (m.minsym) != mst_file_text))
- {
- /* Prevent future lookups in this objfile. */
- bp_objfile_data->terminate_msym.minsym = &msym_not_found;
- continue;
- }
- bp_objfile_data->terminate_msym = m;
- }
+ m = lookup_minimal_symbol (func_name, NULL, objfile);
+ if (m.minsym == NULL || (MSYMBOL_TYPE (m.minsym) != mst_text
+ && MSYMBOL_TYPE (m.minsym) != mst_file_text))
+ {
+ /* Prevent future lookups in this objfile. */
+ bp_objfile_data->terminate_msym.minsym = &msym_not_found;
+ continue;
+ }
+ bp_objfile_data->terminate_msym = m;
+ }
- addr = BMSYMBOL_VALUE_ADDRESS (bp_objfile_data->terminate_msym);
- b = create_internal_breakpoint (get_objfile_arch (objfile), addr,
- bp_std_terminate_master,
- &internal_breakpoint_ops);
- initialize_explicit_location (&explicit_loc);
- explicit_loc.function_name = ASTRDUP (func_name);
- b->location = new_explicit_location (&explicit_loc);
- b->enable_state = bp_disabled;
- }
- }
+ addr = BMSYMBOL_VALUE_ADDRESS (bp_objfile_data->terminate_msym);
+ b = create_internal_breakpoint (objfile->arch (), addr,
+ bp_std_terminate_master,
+ &internal_breakpoint_ops);
+ initialize_explicit_location (&explicit_loc);
+ explicit_loc.function_name = ASTRDUP (func_name);
+ b->location = new_explicit_location (&explicit_loc);
+ b->enable_state = bp_disabled;
+ }
+ }
}
/* Install a master breakpoint on the unwinder's debug hook. */
if (!bp_objfile_data->exception_probes.empty ())
{
- gdbarch = get_objfile_arch (objfile);
+ gdbarch = objfile->arch ();
for (probe *p : bp_objfile_data->exception_probes)
{
if (msym_not_found_p (bp_objfile_data->exception_msym.minsym))
continue;
- gdbarch = get_objfile_arch (objfile);
+ gdbarch = objfile->arch ();
if (bp_objfile_data->exception_msym.minsym == NULL)
{
if (sym)
{
uiout->text ("in ");
- uiout->field_string ("func", SYMBOL_PRINT_NAME (sym),
+ uiout->field_string ("func", sym->print_name (),
function_name_style.style ());
uiout->text (" ");
uiout->wrap_hint (wrap_indent_at_field (uiout, "what"));
there are several. Always display for MI. */
if (allflag
|| (!gdbarch_has_global_breakpoints (target_gdbarch ())
- && (number_of_program_spaces () > 1
+ && (program_spaces.size () > 1
|| number_of_inferiors () > 1)
/* LOC is for existing B, it cannot be in
moribund_locations and thus having NULL OWNER. */
/* Assuming LOC1 and LOC2's types' have meaningful target addresses
(bl_address_is_meaningful), returns true if LOC1 and LOC2 represent
- the same location. */
+ the same location. If SW_HW_BPS_MATCH is true, then software
+ breakpoint locations and hardware breakpoint locations match,
+ otherwise they don't. */
static int
-breakpoint_locations_match (struct bp_location *loc1,
- struct bp_location *loc2)
+breakpoint_locations_match (struct bp_location *loc1,
+ struct bp_location *loc2,
+ bool sw_hw_bps_match)
{
int hw_point1, hw_point2;
else if (is_tracepoint (loc1->owner) || is_tracepoint (loc2->owner))
return tracepoint_locations_match (loc1, loc2);
else
- /* We compare bp_location.length in order to cover ranged breakpoints. */
+ /* We compare bp_location.length in order to cover ranged
+ breakpoints. Keep this in sync with
+ bp_location_is_less_than. */
return (breakpoint_address_match (loc1->pspace->aspace, loc1->address,
loc2->pspace->aspace, loc2->address)
+ && (loc1->loc_type == loc2->loc_type || sw_hw_bps_match)
&& loc1->length == loc2->length);
}
{
struct breakpoint *b = loc->owner;
- function_name = MSYMBOL_LINKAGE_NAME (loc->msymbol);
+ function_name = loc->msymbol->linkage_name ();
if (b->type == bp_breakpoint && b->loc == loc
&& loc->next == NULL && b->related_breakpoint == b)
get_sal_arch (struct symtab_and_line sal)
{
if (sal.section)
- return get_objfile_arch (sal.section->objfile);
+ return sal.section->objfile->arch ();
if (sal.symtab)
- return get_objfile_arch (SYMTAB_OBJFILE (sal.symtab));
+ return SYMTAB_OBJFILE (sal.symtab)->arch ();
return NULL;
}
}
\f
-static int bp_loc_is_permanent (struct bp_location *loc);
+static bool bp_loc_is_permanent (struct bp_location *loc);
+
+/* Handle "set breakpoint auto-hw on".
+
+ If the explicitly specified breakpoint type is not hardware
+ breakpoint, check the memory map to see whether the breakpoint
+ address is in read-only memory.
+
+ - location type is not hardware breakpoint, memory is read-only.
+ We change the type of the location to hardware breakpoint.
+
+ - location type is hardware breakpoint, memory is read-write. This
+ means we've previously made the location hardware one, but then the
+ memory map changed, so we undo.
+*/
+
+static void
+handle_automatic_hardware_breakpoints (bp_location *bl)
+{
+ if (automatic_hardware_breakpoints
+ && bl->owner->type != bp_hardware_breakpoint
+ && (bl->loc_type == bp_loc_software_breakpoint
+ || bl->loc_type == bp_loc_hardware_breakpoint))
+ {
+ /* When breakpoints are removed, remove_breakpoints will use
+ location types we've just set here, the only possible problem
+ is that memory map has changed during running program, but
+ it's not going to work anyway with current gdb. */
+ mem_region *mr = lookup_mem_region (bl->address);
+
+ if (mr != nullptr)
+ {
+ enum bp_loc_type new_type;
+
+ if (mr->attrib.mode != MEM_RW)
+ new_type = bp_loc_hardware_breakpoint;
+ else
+ new_type = bp_loc_software_breakpoint;
+
+ if (new_type != bl->loc_type)
+ {
+ static bool said = false;
+
+ bl->loc_type = new_type;
+ if (!said)
+ {
+ fprintf_filtered (gdb_stdout,
+ _("Note: automatically using "
+ "hardware breakpoints for "
+ "read-only addresses.\n"));
+ said = true;
+ }
+ }
+ }
+ }
+}
static struct bp_location *
add_location_to_breakpoint (struct breakpoint *b,
}
\f
-/* See breakpoint.h. */
-
-int
-program_breakpoint_here_p (struct gdbarch *gdbarch, CORE_ADDR address)
-{
- int len;
- CORE_ADDR addr;
- const gdb_byte *bpoint;
- gdb_byte *target_mem;
+/* Return true if LOC is pointing to a permanent breakpoint,
+ return false otherwise. */
- addr = address;
- bpoint = gdbarch_breakpoint_from_pc (gdbarch, &addr, &len);
-
- /* Software breakpoints unsupported? */
- if (bpoint == NULL)
- return 0;
-
- target_mem = (gdb_byte *) alloca (len);
-
- /* Enable the automatic memory restoration from breakpoints while
- we read the memory. Otherwise we could say about our temporary
- breakpoints they are permanent. */
- scoped_restore restore_memory
- = make_scoped_restore_show_memory_breakpoints (0);
-
- if (target_read_memory (address, target_mem, len) == 0
- && memcmp (target_mem, bpoint, len) == 0)
- return 1;
-
- return 0;
-}
-
-/* Return 1 if LOC is pointing to a permanent breakpoint,
- return 0 otherwise. */
-
-static int
+static bool
bp_loc_is_permanent (struct bp_location *loc)
{
gdb_assert (loc != NULL);
/* If we have a non-breakpoint-backed catchpoint or a software
watchpoint, just return 0. We should not attempt to read from
the addresses the locations of these breakpoint types point to.
- program_breakpoint_here_p, below, will attempt to read
+ gdbarch_program_breakpoint_here_p, below, will attempt to read
memory. */
if (!bl_address_is_meaningful (loc))
- return 0;
+ return false;
scoped_restore_current_pspace_and_thread restore_pspace_thread;
switch_to_program_space_and_thread (loc->pspace);
- return program_breakpoint_here_p (loc->gdbarch, loc->address);
+ return gdbarch_program_breakpoint_here_p (loc->gdbarch, loc->address);
}
/* Build a command list for the dprintf corresponding to the current
return sals;
}
+/* Returns the breakpoint ops appropriate for use with with LOCATION_TYPE and
+ according to IS_TRACEPOINT. */
+
+static const struct breakpoint_ops *
+breakpoint_ops_for_event_location_type (enum event_location_type location_type,
+ bool is_tracepoint)
+{
+ if (is_tracepoint)
+ {
+ if (location_type == PROBE_LOCATION)
+ return &tracepoint_probe_breakpoint_ops;
+ else
+ return &tracepoint_breakpoint_ops;
+ }
+ else
+ {
+ if (location_type == PROBE_LOCATION)
+ return &bkpt_probe_breakpoint_ops;
+ else
+ return &bkpt_breakpoint_ops;
+ }
+}
+
+/* See breakpoint.h. */
+
+const struct breakpoint_ops *
+breakpoint_ops_for_event_location (const struct event_location *location,
+ bool is_tracepoint)
+{
+ if (location != nullptr)
+ return breakpoint_ops_for_event_location_type
+ (event_location_type (location), is_tracepoint);
+ return is_tracepoint ? &tracepoint_breakpoint_ops : &bkpt_breakpoint_ops;
+}
+
/* See breakpoint.h. */
int
enum bptype type_wanted = (flag & BP_HARDWAREFLAG
? bp_hardware_breakpoint
: bp_breakpoint);
- struct breakpoint_ops *ops;
event_location_up location = string_to_event_location (&arg, current_language);
-
- /* Matching breakpoints on probes. */
- if (location != NULL
- && event_location_type (location.get ()) == PROBE_LOCATION)
- ops = &bkpt_probe_breakpoint_ops;
- else
- ops = &bkpt_breakpoint_ops;
+ const struct breakpoint_ops *ops = breakpoint_ops_for_event_location
+ (location.get (), false /* is_tracepoint */);
create_breakpoint (get_current_arch (),
location.get (),
print_recreate_masked_watchpoint (struct breakpoint *b, struct ui_file *fp)
{
struct watchpoint *w = (struct watchpoint *) b;
- char tmp[40];
switch (b->type)
{
_("Invalid hardware watchpoint type."));
}
- sprintf_vma (tmp, w->hw_wp_mask);
- fprintf_unfiltered (fp, " %s mask 0x%s", w->exp_string, tmp);
+ fprintf_unfiltered (fp, " %s mask 0x%s", w->exp_string,
+ phex (w->hw_wp_mask, sizeof (CORE_ADDR)));
print_recreate_thread (b, fp);
}
explicitly, never if they just happen to appear in a
middle of some value chain. */
if (v == head
- || (TYPE_CODE (vtype) != TYPE_CODE_STRUCT
- && TYPE_CODE (vtype) != TYPE_CODE_ARRAY))
+ || (vtype->code () != TYPE_CODE_STRUCT
+ && vtype->code () != TYPE_CODE_ARRAY))
{
CORE_ADDR vaddr = value_address (v);
int len;
b->language = language_ada;
}
-static void
-catch_command (const char *arg, int from_tty)
-{
- error (_("Catch requires an event name."));
-}
\f
-static void
-tcatch_command (const char *arg, int from_tty)
-{
- error (_("Catch requires an event name."));
-}
-
/* Compare two breakpoints and return a strcmp-like result. */
static int
}
/* A comparison function for bp_location AP and BP being interfaced to
- qsort. Sort elements primarily by their ADDRESS (no matter what
+ std::sort. Sort elements primarily by their ADDRESS (no matter what
bl_address_is_meaningful says), secondarily by ordering first
permanent elements and terciarily just ensuring the array is sorted
- stable way despite qsort being an unstable algorithm. */
+ stable way despite std::sort being an unstable algorithm. */
static int
-bp_locations_compare (const void *ap, const void *bp)
+bp_location_is_less_than (const bp_location *a, const bp_location *b)
{
- const struct bp_location *a = *(const struct bp_location **) ap;
- const struct bp_location *b = *(const struct bp_location **) bp;
-
if (a->address != b->address)
- return (a->address > b->address) - (a->address < b->address);
+ return a->address < b->address;
/* Sort locations at the same address by their pspace number, keeping
locations of the same inferior (in a multi-inferior environment)
grouped. */
if (a->pspace->num != b->pspace->num)
- return ((a->pspace->num > b->pspace->num)
- - (a->pspace->num < b->pspace->num));
+ return a->pspace->num < b->pspace->num;
/* Sort permanent breakpoints first. */
if (a->permanent != b->permanent)
- return (a->permanent < b->permanent) - (a->permanent > b->permanent);
+ return a->permanent > b->permanent;
+
+ /* Sort by type in order to make duplicate determination easier.
+ See update_global_location_list. This is kept in sync with
+ breakpoint_locations_match. */
+ if (a->loc_type < b->loc_type)
+ return true;
+
+ /* Likewise, for range-breakpoints, sort by length. */
+ if (a->loc_type == bp_loc_hardware_breakpoint
+ && b->loc_type == bp_loc_hardware_breakpoint
+ && a->length < b->length)
+ return true;
/* Make the internal GDB representation stable across GDB runs
where A and B memory inside GDB can differ. Breakpoint locations of
the same type at the same address can be sorted in arbitrary order. */
if (a->owner->number != b->owner->number)
- return ((a->owner->number > b->owner->number)
- - (a->owner->number < b->owner->number));
+ return a->owner->number < b->owner->number;
- return (a > b) - (a < b);
+ return a < b;
}
/* Set bp_locations_placed_address_before_address_max and
loc->cond_bytecode.reset ();
}
}
+
/* Called whether new breakpoints are created, or existing breakpoints
deleted, to update the global location list and recompute which
locations are duplicate of which.
ALL_BREAKPOINTS (b)
for (loc = b->loc; loc; loc = loc->next)
*locp++ = loc;
- qsort (bp_locations, bp_locations_count, sizeof (*bp_locations),
- bp_locations_compare);
+
+ /* See if we need to "upgrade" a software breakpoint to a hardware
+ breakpoint. Do this before deciding whether locations are
+ duplicates. Also do this before sorting because sorting order
+ depends on location type. */
+ for (locp = bp_locations;
+ locp < bp_locations + bp_locations_count;
+ locp++)
+ {
+ loc = *locp;
+ if (!loc->inserted && should_be_inserted (loc))
+ handle_automatic_hardware_breakpoints (loc);
+ }
+
+ std::sort (bp_locations, bp_locations + bp_locations_count,
+ bp_location_is_less_than);
bp_locations_target_extensions_update ();
{
struct bp_location *loc2 = *loc2p;
+ if (loc2 == old_loc)
+ continue;
+
if (breakpoint_locations_match (loc2, old_loc))
{
/* Read watchpoint locations are switched to
/* loc2 is a duplicated location. We need to check
if it should be inserted in case it will be
unduplicated. */
- if (loc2 != old_loc
- && unduplicated_should_be_inserted (loc2))
+ if (unduplicated_should_be_inserted (loc2))
{
swap_insertion (old_loc, loc2);
keep_in_target = 1;
around. We simply always ignore hardware watchpoint
traps we can no longer explain. */
- old_loc->events_till_retirement = 3 * (thread_count () + 1);
+ process_stratum_target *proc_target = nullptr;
+ for (inferior *inf : all_inferiors ())
+ if (inf->pspace == old_loc->pspace)
+ {
+ proc_target = inf->process_target ();
+ break;
+ }
+ if (proc_target != nullptr)
+ old_loc->events_till_retirement
+ = 3 * (thread_count (proc_target) + 1);
+ else
+ old_loc->events_till_retirement = 1;
old_loc->owner = NULL;
moribund_locations.push_back (old_loc);
struct breakpoint_ops tracepoint_breakpoint_ops;
-/* The breakpoint_ops structure to be use on tracepoints placed in a
- static probe. */
+/* Virtual table for tracepoints on static probes. */
static void
tracepoint_probe_create_sals_from_location
return bkpt_probe_decode_location (b, location, search_pspace);
}
-static struct breakpoint_ops tracepoint_probe_breakpoint_ops;
-
/* Dprintf breakpoint_ops methods. */
static void
uiout->text ("Now in ");
if (sym)
{
- uiout->field_string ("func", SYMBOL_PRINT_NAME (sym),
+ uiout->field_string ("func", sym->print_name (),
function_name_style.style ());
uiout->text (" at ");
}
if (have_ambiguous_names)
{
for (; l; l = l->next)
- if (breakpoint_locations_match (e, l))
- {
- l->enabled = 0;
- break;
- }
+ {
+ /* Ignore software vs hardware location type at
+ this point, because with "set breakpoint
+ auto-hw", after a re-set, locations that were
+ hardware can end up as software, or vice versa.
+ As mentioned above, this is an heuristic and in
+ practice should give the correct answer often
+ enough. */
+ if (breakpoint_locations_match (e, l, true))
+ {
+ l->enabled = 0;
+ break;
+ }
+ }
}
else
{
});
}
\f
-static void
-set_breakpoint_cmd (const char *args, int from_tty)
-{
-}
-
-static void
-show_breakpoint_cmd (const char *args, int from_tty)
-{
-}
-
/* Invalidate last known value of any hardware watchpoint if
the memory which that value represents has been written to by
GDB itself. */
static void
trace_command (const char *arg, int from_tty)
{
- struct breakpoint_ops *ops;
-
event_location_up location = string_to_event_location (&arg,
current_language);
- if (location != NULL
- && event_location_type (location.get ()) == PROBE_LOCATION)
- ops = &tracepoint_probe_breakpoint_ops;
- else
- ops = &tracepoint_breakpoint_ops;
+ const struct breakpoint_ops *ops = breakpoint_ops_for_event_location
+ (location.get (), true /* is_tracepoint */);
create_breakpoint (get_current_arch (),
location.get (),
set_cmd_completer (command, completer);
}
-static void
-save_command (const char *arg, int from_tty)
-{
- printf_unfiltered (_("\"save\" must be followed by "
- "the name of a save subcommand.\n"));
- help_list (save_cmdlist, "save ", all_commands, gdb_stdout);
-}
-
struct breakpoint *
iterate_over_breakpoints (gdb::function_view<bool (breakpoint *)> callback)
{
cmd_list_element *commands_cmd_element = nullptr;
+void _initialize_breakpoint ();
void
-_initialize_breakpoint (void)
+_initialize_breakpoint ()
{
struct cmd_list_element *c;
add_com_alias ("dis", "disable", class_breakpoint, 1);
add_com_alias ("disa", "disable", class_breakpoint, 1);
- add_cmd ("breakpoints", class_alias, disable_command, _("\
+ add_cmd ("breakpoints", class_breakpoint, disable_command, _("\
Disable all or some breakpoints.\n\
Usage: disable breakpoints [BREAKPOINTNUM]...\n\
Arguments are breakpoint numbers with spaces in between.\n\
add_com_alias ("d", "delete", class_breakpoint, 1);
add_com_alias ("del", "delete", class_breakpoint, 1);
- add_cmd ("breakpoints", class_alias, delete_command, _("\
+ add_cmd ("breakpoints", class_breakpoint, delete_command, _("\
Delete all or some breakpoints or auto-display expressions.\n\
Usage: delete breakpoints [BREAKPOINTNUM]...\n\
Arguments are breakpoint numbers with spaces in between.\n\
breakpoint set."),
&maintenanceinfolist);
- add_prefix_cmd ("catch", class_breakpoint, catch_command, _("\
+ add_basic_prefix_cmd ("catch", class_breakpoint, _("\
Set catchpoints to catch events."),
- &catch_cmdlist, "catch ",
- 0/*allow-unknown*/, &cmdlist);
+ &catch_cmdlist, "catch ",
+ 0/*allow-unknown*/, &cmdlist);
- add_prefix_cmd ("tcatch", class_breakpoint, tcatch_command, _("\
+ add_basic_prefix_cmd ("tcatch", class_breakpoint, _("\
Set temporary catchpoints to catch events."),
- &tcatch_cmdlist, "tcatch ",
- 0/*allow-unknown*/, &cmdlist);
+ &tcatch_cmdlist, "tcatch ",
+ 0/*allow-unknown*/, &cmdlist);
add_catch_command ("fork", _("Catch calls to fork."),
catch_fork_command_1,
Do \"help tracepoints\" for info on other tracepoint commands."));
set_cmd_completer (c, location_completer);
- add_com_alias ("tp", "trace", class_alias, 0);
- add_com_alias ("tr", "trace", class_alias, 1);
- add_com_alias ("tra", "trace", class_alias, 1);
- add_com_alias ("trac", "trace", class_alias, 1);
+ add_com_alias ("tp", "trace", class_breakpoint, 0);
+ add_com_alias ("tr", "trace", class_breakpoint, 1);
+ add_com_alias ("tra", "trace", class_breakpoint, 1);
+ add_com_alias ("trac", "trace", class_breakpoint, 1);
c = add_com ("ftrace", class_breakpoint, ftrace_command, _("\
Set a fast tracepoint at specified location.\n\
Usage: passcount COUNT TPNUM, where TPNUM may also be \"all\";\n\
if TPNUM is omitted, passcount refers to the last tracepoint defined."));
- add_prefix_cmd ("save", class_breakpoint, save_command,
- _("Save breakpoint definitions as a script."),
- &save_cmdlist, "save ",
- 0/*allow-unknown*/, &cmdlist);
+ add_basic_prefix_cmd ("save", class_breakpoint,
+ _("Save breakpoint definitions as a script."),
+ &save_cmdlist, "save ",
+ 0/*allow-unknown*/, &cmdlist);
c = add_cmd ("breakpoints", class_breakpoint, save_breakpoints_command, _("\
Save current breakpoint definitions as a script.\n\
c = add_com_alias ("save-tracepoints", "save tracepoints", class_trace, 0);
deprecate_cmd (c, "save tracepoints");
- add_prefix_cmd ("breakpoint", class_maintenance, set_breakpoint_cmd, _("\
+ add_basic_prefix_cmd ("breakpoint", class_maintenance, _("\
Breakpoint specific settings.\n\
Configure various breakpoint-specific variables such as\n\
pending breakpoint behavior."),
- &breakpoint_set_cmdlist, "set breakpoint ",
- 0/*allow-unknown*/, &setlist);
- add_prefix_cmd ("breakpoint", class_maintenance, show_breakpoint_cmd, _("\
+ &breakpoint_set_cmdlist, "set breakpoint ",
+ 0/*allow-unknown*/, &setlist);
+ add_show_prefix_cmd ("breakpoint", class_maintenance, _("\
Breakpoint specific settings.\n\
Configure various breakpoint-specific variables such as\n\
pending breakpoint behavior."),
- &breakpoint_show_cmdlist, "show breakpoint ",
- 0/*allow-unknown*/, &showlist);
+ &breakpoint_show_cmdlist, "show breakpoint ",
+ 0/*allow-unknown*/, &showlist);
add_setshow_auto_boolean_cmd ("pending", no_class,
&pending_break_support, _("\
projects / deliverable / binutils-gdb.git / blobdiff