From: Simon Marchi <simon.marchi@efficios.com>
To: gdb-patches@sourceware.org
Cc: Simon Marchi <simon.marchi@efficios.com>
Subject: [PATCH 05/12] gdb: add breakpoint::first_loc methods
Date: Thu, 11 May 2023 10:48:25 -0400 [thread overview]
Message-ID: <20230511144832.17974-6-simon.marchi@efficios.com> (raw)
In-Reply-To: <20230511144832.17974-1-simon.marchi@efficios.com>
Add convenience first_loc methods to struct breakpoint (const and
non-const overloads). A subsequent patch changes the list of locations
to be an intrusive_list and makes the actual list private, so these
spots would need to become something ugly like:
-b->loc
+*b->locations ().begin ()
That would make the code much heavier and not readable. There is a
surprisingly big number of places that access the first location of
breakpoints. Whether this is correct, or these spots fail to consider
the possibility of multi-location breakpoints, I don't know. But
anyhow, I think that using this instead:
b->first_loc ()
conveys the intention better than the other two forms.
Change-Id: Ibbefe3e4ca6cdfe570351fe7e2725f2ce11d1e95
---
gdb/breakpoint.c | 112 ++++++++++++++++++++--------------------
gdb/breakpoint.h | 14 +++++
gdb/elfread.c | 4 +-
gdb/infrun.c | 11 ++--
gdb/tracectf.c | 2 +-
gdb/tracefile-tfile.c | 2 +-
gdb/tracefile.c | 2 +-
gdb/tracepoint.c | 2 +-
gdb/tui/tui-winsource.c | 2 +-
9 files changed, 82 insertions(+), 69 deletions(-)
diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c
index fefe18644cf9..e9b6574bba77 100644
--- a/gdb/breakpoint.c
+++ b/gdb/breakpoint.c
@@ -4106,7 +4106,7 @@ breakpoint_init_inferior (enum inf_context context)
for (breakpoint *b : all_breakpoints_safe ())
{
- if (b->has_locations () && b->loc->pspace != pspace)
+ if (b->has_locations () && b->first_loc ().pspace != pspace)
continue;
switch (b->type)
@@ -5633,7 +5633,7 @@ build_bpstat_chain (const address_space *aspace, CORE_ADDR bp_addr,
entire expression, not the individual locations. For
read watchpoints, the watchpoints_triggered function has
checked all locations already. */
- if (b->type == bp_hardware_watchpoint && bl != b->loc)
+ if (b->type == bp_hardware_watchpoint && bl != &b->first_loc ())
break;
if (!bl->enabled || bl->disabled_by_cond || bl->shlib_disabled)
@@ -6160,8 +6160,7 @@ bp_location_condition_evaluator (const struct bp_location *bl)
/* Print the LOC location out of the list of B->LOC locations. */
static void
-print_breakpoint_location (const breakpoint *b,
- struct bp_location *loc)
+print_breakpoint_location (const breakpoint *b, const bp_location *loc)
{
struct ui_out *uiout = current_uiout;
@@ -6361,11 +6360,11 @@ print_one_breakpoint_location (struct breakpoint *b,
if (loc == NULL
&& (b->has_locations ()
&& (b->has_multiple_locations ()
- || !b->loc->enabled || b->loc->disabled_by_cond)))
+ || !b->first_loc ().enabled || b->first_loc ().disabled_by_cond)))
header_of_multiple = true;
- if (loc == NULL)
- loc = b->loc;
+ if (loc == NULL && b->has_locations ())
+ loc = &b->first_loc ();
annotate_record ();
@@ -6465,7 +6464,7 @@ print_one_breakpoint_location (struct breakpoint *b,
if (!header_of_multiple)
print_breakpoint_location (b, loc);
if (b->has_locations ())
- *last_loc = b->loc;
+ *last_loc = &b->first_loc ();
}
}
@@ -6745,8 +6744,8 @@ print_one_breakpoint (breakpoint *b, const bp_location **last_loc, int allflag)
&& (allflag
|| (b->has_locations ()
&& (b->has_multiple_locations ()
- || !b->loc->enabled
- || b->loc->disabled_by_cond))))
+ || !b->first_loc ().enabled
+ || b->first_loc ().disabled_by_cond))))
{
gdb::optional<ui_out_emit_list> locations_list;
@@ -7743,7 +7742,7 @@ create_thread_event_breakpoint (struct gdbarch *gdbarch, CORE_ADDR address)
b->enable_state = bp_enabled;
/* locspec has to be used or breakpoint_re_set will delete me. */
- b->locspec = new_address_location_spec (b->loc->address, NULL, 0);
+ b->locspec = new_address_location_spec (b->first_loc ().address, NULL, 0);
update_global_location_list_nothrow (UGLL_MAY_INSERT);
@@ -7771,7 +7770,7 @@ remove_jit_event_breakpoints (void)
{
for (breakpoint *b : all_breakpoints_safe ())
if (b->type == bp_jit_event
- && b->loc->pspace == current_program_space)
+ && b->first_loc ().pspace == current_program_space)
delete_breakpoint (b);
}
@@ -7780,7 +7779,7 @@ remove_solib_event_breakpoints (void)
{
for (breakpoint *b : all_breakpoints_safe ())
if (b->type == bp_shlib_event
- && b->loc->pspace == current_program_space)
+ && b->first_loc ().pspace == current_program_space)
delete_breakpoint (b);
}
@@ -7791,7 +7790,7 @@ remove_solib_event_breakpoints_at_next_stop (void)
{
for (breakpoint *b : all_breakpoints_safe ())
if (b->type == bp_shlib_event
- && b->loc->pspace == current_program_space)
+ && b->first_loc ().pspace == current_program_space)
b->disposition = disp_del_at_next_stop;
}
@@ -7826,7 +7825,7 @@ create_and_insert_solib_event_breakpoint (struct gdbarch *gdbarch, CORE_ADDR add
/* Explicitly tell update_global_location_list to insert
locations. */
b = create_solib_event_breakpoint_1 (gdbarch, address, UGLL_INSERT);
- if (!b->loc->inserted)
+ if (!b->first_loc ().inserted)
{
delete_breakpoint (b);
return NULL;
@@ -8178,17 +8177,18 @@ momentary_breakpoint_from_master (struct breakpoint *orig,
std::unique_ptr<breakpoint> copy
(new_momentary_breakpoint (orig->gdbarch, type, orig->pspace,
orig->frame_id, thread));
+ bp_location &orig_loc = orig->first_loc ();
copy->loc = copy->allocate_location ();
set_breakpoint_location_function (copy->loc);
- copy->loc->gdbarch = orig->loc->gdbarch;
- copy->loc->requested_address = orig->loc->requested_address;
- copy->loc->address = orig->loc->address;
- copy->loc->section = orig->loc->section;
- copy->loc->pspace = orig->loc->pspace;
- copy->loc->probe = orig->loc->probe;
- copy->loc->line_number = orig->loc->line_number;
- copy->loc->symtab = orig->loc->symtab;
+ copy->loc->gdbarch = orig_loc.gdbarch;
+ copy->loc->requested_address = orig_loc.requested_address;
+ copy->loc->address = orig_loc.address;
+ copy->loc->section = orig_loc.section;
+ copy->loc->pspace = orig_loc.pspace;
+ copy->loc->probe = orig_loc.probe;
+ copy->loc->line_number = orig_loc.line_number;
+ copy->loc->symtab = orig_loc.symtab;
copy->loc->enabled = loc_enabled;
breakpoint *b = add_to_breakpoint_chain (std::move (copy));
@@ -8575,7 +8575,7 @@ code_breakpoint::code_breakpoint (struct gdbarch *gdbarch_,
if (locspec_ != nullptr)
locspec = std::move (locspec_);
else
- locspec = new_address_location_spec (this->loc->address, NULL, 0);
+ locspec = new_address_location_spec (this->first_loc ().address, NULL, 0);
filter = std::move (filter_);
}
@@ -9411,7 +9411,6 @@ ranged_breakpoint::print_it (const bpstat *bs) const
bool
ranged_breakpoint::print_one (const bp_location **last_loc) const
{
- struct bp_location *bl = loc;
struct value_print_options opts;
struct ui_out *uiout = current_uiout;
@@ -9425,8 +9424,8 @@ ranged_breakpoint::print_one (const bp_location **last_loc) const
by ranged_breakpoint::print_one_detail. */
uiout->field_skip ("addr");
annotate_field (5);
- print_breakpoint_location (this, bl);
- *last_loc = bl;
+ print_breakpoint_location (this, &this->first_loc ());
+ *last_loc = &this->first_loc ();
return true;
}
@@ -9437,18 +9436,16 @@ void
ranged_breakpoint::print_one_detail (struct ui_out *uiout) const
{
CORE_ADDR address_start, address_end;
- struct bp_location *bl = loc;
+ const bp_location &bl = this->first_loc ();
string_file stb;
- gdb_assert (bl);
-
- address_start = bl->address;
- address_end = address_start + bl->length - 1;
+ address_start = bl.address;
+ address_end = address_start + bl.length - 1;
uiout->text ("\taddress range: ");
stb.printf ("[%s, %s]",
- print_core_address (bl->gdbarch, address_start),
- print_core_address (bl->gdbarch, address_end));
+ print_core_address (bl.gdbarch, address_start),
+ print_core_address (bl.gdbarch, address_end));
uiout->field_stream ("addr", stb);
uiout->text ("\n");
}
@@ -9458,15 +9455,14 @@ ranged_breakpoint::print_one_detail (struct ui_out *uiout) const
void
ranged_breakpoint::print_mention () const
{
- struct bp_location *bl = loc;
+ const bp_location &bl = this->first_loc ();
struct ui_out *uiout = current_uiout;
- gdb_assert (bl);
gdb_assert (type == bp_hardware_breakpoint);
uiout->message (_("Hardware assisted ranged breakpoint %d from %s to %s."),
- number, paddress (bl->gdbarch, bl->address),
- paddress (bl->gdbarch, bl->address + bl->length - 1));
+ number, paddress (bl.gdbarch, bl.address),
+ paddress (bl.gdbarch, bl.address + bl.length - 1));
}
/* Implement the "print_recreate" method for ranged breakpoints. */
@@ -9992,7 +9988,7 @@ masked_watchpoint::print_one_detail (struct ui_out *uiout) const
gdb_assert (this->has_single_location ());
uiout->text ("\tmask ");
- uiout->field_core_addr ("mask", loc->gdbarch, hw_wp_mask);
+ uiout->field_core_addr ("mask", this->first_loc ().gdbarch, hw_wp_mask);
uiout->text ("\n");
}
@@ -10302,11 +10298,11 @@ watch_command_1 (const char *arg, int accessflag, int from_tty,
scope_breakpoint->frame_id = caller_frame_id;
/* Set the address at which we will stop. */
- scope_breakpoint->loc->gdbarch = caller_arch;
- scope_breakpoint->loc->requested_address = caller_pc;
- scope_breakpoint->loc->address
- = adjust_breakpoint_address (scope_breakpoint->loc->gdbarch,
- scope_breakpoint->loc->requested_address,
+ bp_location &loc = scope_breakpoint->first_loc ();
+ loc.gdbarch = caller_arch;
+ loc.requested_address = caller_pc;
+ loc.address
+ = adjust_breakpoint_address (loc.gdbarch, loc.requested_address,
scope_breakpoint->type,
current_program_space);
}
@@ -11599,23 +11595,24 @@ code_breakpoint::say_where () const
}
else
{
- if (opts.addressprint || loc->symtab == NULL)
+ const bp_location &bl = this->first_loc ();
+ if (opts.addressprint || bl.symtab == nullptr)
gdb_printf (" at %ps",
styled_string (address_style.style (),
- paddress (loc->gdbarch,
- loc->address)));
- if (loc->symtab != NULL)
+ paddress (bl.gdbarch,
+ bl.address)));
+ if (bl.symtab != NULL)
{
/* If there is a single location, we can print the location
more nicely. */
if (!this->has_multiple_locations ())
{
const char *filename
- = symtab_to_filename_for_display (loc->symtab);
+ = symtab_to_filename_for_display (bl.symtab);
gdb_printf (": file %ps, line %d.",
styled_string (file_name_style.style (),
filename),
- loc->line_number);
+ bl.line_number);
}
else
/* This is not ideal, but each location may have a
@@ -12629,14 +12626,14 @@ update_static_tracepoint (struct breakpoint *b, struct symtab_and_line sal)
uiout->field_signed ("line", sal2.line);
uiout->text ("\n");
- b->loc->line_number = sal2.line;
- b->loc->symtab = sym != NULL ? sal2.symtab : NULL;
+ b->first_loc ().line_number = sal2.line;
+ b->first_loc ().symtab = sym != NULL ? sal2.symtab : NULL;
std::unique_ptr<explicit_location_spec> els
(new explicit_location_spec ());
els->source_filename
= xstrdup (symtab_to_filename_for_display (sal2.symtab));
- els->line_offset.offset = b->loc->line_number;
+ els->line_offset.offset = b->first_loc ().line_number;
els->line_offset.sign = LINE_OFFSET_NONE;
b->locspec = std::move (els);
@@ -12873,9 +12870,10 @@ code_breakpoint::location_spec_to_sals (location_spec *locspec,
&& (condition_not_parsed
|| (this->has_locations ()
&& search_pspace != NULL
- && loc->pspace != search_pspace)
- || (this->has_locations () && loc->shlib_disabled)
- || (this->has_locations () && loc->pspace->executing_startup)
+ && this->first_loc ().pspace != search_pspace)
+ || (this->has_locations () && this->first_loc ().shlib_disabled)
+ || (this->has_locations ()
+ && this->first_loc ().pspace->executing_startup)
|| enable_state == bp_disabled))
not_found_and_ok = true;
@@ -13047,7 +13045,7 @@ breakpoint_re_set_thread (struct breakpoint *b)
selected as current, and unless this was a vfork will have a
different program space from the original thread. Reset that
as well. */
- b->loc->pspace = current_program_space;
+ b->first_loc ().pspace = current_program_space;
}
}
diff --git a/gdb/breakpoint.h b/gdb/breakpoint.h
index 2a3a5cf57b83..9f49ed62a9ad 100644
--- a/gdb/breakpoint.h
+++ b/gdb/breakpoint.h
@@ -645,6 +645,20 @@ struct breakpoint
bool has_multiple_locations () const
{ return this->loc != nullptr && this->loc->next != nullptr; }
+ /* Return a reference to the first location of this breakpoint. */
+ bp_location &first_loc ()
+ {
+ gdb_assert (this->has_locations ());
+ return *this->loc;
+ }
+
+ /* Return a reference to the first location of this breakpoint. */
+ const bp_location &first_loc () const
+ {
+ gdb_assert (this->has_locations ());
+ return *this->loc;
+ }
+
/* Reevaluate a breakpoint. This is necessary after symbols change
(e.g., an executable or DSO was loaded, or the inferior just
started). */
diff --git a/gdb/elfread.c b/gdb/elfread.c
index 7169ae8808a8..2d4f23416245 100644
--- a/gdb/elfread.c
+++ b/gdb/elfread.c
@@ -974,7 +974,7 @@ elf_gnu_ifunc_resolver_stop (code_breakpoint *b)
gdb_assert (frame_id_p (b_return->frame_id));
if (b_return->thread == thread_id
- && b_return->loc->requested_address == prev_pc
+ && b_return->first_loc ().requested_address == prev_pc
&& b_return->frame_id == prev_frame_id)
break;
}
@@ -1043,7 +1043,7 @@ elf_gnu_ifunc_resolver_return_stop (code_breakpoint *b)
func_func = value::allocate (func_func_type);
func_func->set_lval (lval_memory);
- func_func->set_address (b->loc->related_address);
+ func_func->set_address (b->first_loc ().related_address);
value = value::allocate (value_type);
gdbarch_return_value_as_value (gdbarch, func_func, value_type, regcache,
diff --git a/gdb/infrun.c b/gdb/infrun.c
index efe2c00c489a..a9e2a2423b17 100644
--- a/gdb/infrun.c
+++ b/gdb/infrun.c
@@ -950,14 +950,14 @@ follow_inferior_reset_breakpoints (void)
if (tp->control.step_resume_breakpoint)
{
breakpoint_re_set_thread (tp->control.step_resume_breakpoint);
- tp->control.step_resume_breakpoint->loc->enabled = 1;
+ tp->control.step_resume_breakpoint->first_loc ().enabled = 1;
}
/* Treat exception_resume breakpoints like step_resume breakpoints. */
if (tp->control.exception_resume_breakpoint)
{
breakpoint_re_set_thread (tp->control.exception_resume_breakpoint);
- tp->control.exception_resume_breakpoint->loc->enabled = 1;
+ tp->control.exception_resume_breakpoint->first_loc ().enabled = 1;
}
/* Reinsert all breakpoints in the child. The user may have set
@@ -2551,7 +2551,8 @@ resume_1 (enum gdb_signal sig)
user breakpoints at PC to trigger (again) when this
hits. */
insert_hp_step_resume_breakpoint_at_frame (get_current_frame ());
- gdb_assert (tp->control.step_resume_breakpoint->loc->permanent);
+ gdb_assert (tp->control.step_resume_breakpoint->first_loc ()
+ .permanent);
tp->step_after_step_resume_breakpoint = step;
}
@@ -7008,9 +7009,9 @@ process_event_stop_test (struct execution_control_state *ecs)
= ecs->event_thread->control.step_resume_breakpoint;
if (sr_bp != nullptr
- && sr_bp->loc->permanent
+ && sr_bp->first_loc ().permanent
&& sr_bp->type == bp_hp_step_resume
- && sr_bp->loc->address == ecs->event_thread->prev_pc)
+ && sr_bp->first_loc ().address == ecs->event_thread->prev_pc)
{
infrun_debug_printf ("stepped permanent breakpoint, stopped in handler");
delete_step_resume_breakpoint (ecs->event_thread);
diff --git a/gdb/tracectf.c b/gdb/tracectf.c
index ab513b1fa158..16461711da18 100644
--- a/gdb/tracectf.c
+++ b/gdb/tracectf.c
@@ -1536,7 +1536,7 @@ ctf_get_traceframe_address (void)
= get_tracepoint_by_number_on_target (tpnum);
if (tp != nullptr && tp->has_locations ())
- addr = tp->loc->address;
+ addr = tp->first_loc ().address;
}
/* Restore the position. */
diff --git a/gdb/tracefile-tfile.c b/gdb/tracefile-tfile.c
index 9c1adee11bc3..9203bcc2e4bb 100644
--- a/gdb/tracefile-tfile.c
+++ b/gdb/tracefile-tfile.c
@@ -668,7 +668,7 @@ tfile_get_traceframe_address (off_t tframe_offset)
tp = get_tracepoint_by_number_on_target (tpnum);
/* FIXME this is a poor heuristic if multiple locations. */
if (tp != nullptr && tp->has_locations ())
- addr = tp->loc->address;
+ addr = tp->first_loc ().address;
/* Restore our seek position. */
cur_offset = saved_offset;
diff --git a/gdb/tracefile.c b/gdb/tracefile.c
index 883ce4bf375a..5a2641919f74 100644
--- a/gdb/tracefile.c
+++ b/gdb/tracefile.c
@@ -412,7 +412,7 @@ tracefile_fetch_registers (struct regcache *regcache, int regno)
/* Guess what we can from the tracepoint location. */
gdbarch_guess_tracepoint_registers (gdbarch, regcache,
- tp->loc->address);
+ tp->first_loc ().address);
}
/* This is the implementation of target_ops method to_has_all_memory. */
diff --git a/gdb/tracepoint.c b/gdb/tracepoint.c
index 4a9d8491a54b..99d175d32e42 100644
--- a/gdb/tracepoint.c
+++ b/gdb/tracepoint.c
@@ -2750,7 +2750,7 @@ get_traceframe_location (int *stepping_frame_p)
/* If this is a stepping frame, we don't know which location
triggered. The first is as good (or bad) a guess as any... */
*stepping_frame_p = 1;
- return t->loc;
+ return &t->first_loc ();
}
/* Return the default collect actions of a tracepoint T. */
diff --git a/gdb/tui/tui-winsource.c b/gdb/tui/tui-winsource.c
index 3c4ce501e5ee..3fc38b7be233 100644
--- a/gdb/tui/tui-winsource.c
+++ b/gdb/tui/tui-winsource.c
@@ -640,7 +640,7 @@ tui_source_window_base::update_breakpoint_info
mode |= TUI_BP_ENABLED;
if (bp->hit_count)
mode |= TUI_BP_HIT;
- if (bp->loc->cond)
+ if (bp->first_loc ().cond)
mode |= TUI_BP_CONDITIONAL;
if (bp->type == bp_hardware_breakpoint)
mode |= TUI_BP_HARDWARE;
--
2.40.1
next prev parent reply other threads:[~2023-05-11 14:48 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-05-11 14:48 [PATCH 00/12] Use intrusive_list for breakpoints and breakpoint locations Simon Marchi
2023-05-11 14:48 ` [PATCH 01/12] gdb: get gdbarch from syscall_catchpoint instead of location Simon Marchi
2023-05-15 9:12 ` Alexandra Petlanova Hajkova
2023-05-11 14:48 ` [PATCH 02/12] gdb: make some breakpoint methods use `this` Simon Marchi
2023-05-15 13:12 ` Alexandra Petlanova Hajkova
2023-05-15 18:25 ` Simon Marchi
2023-05-11 14:48 ` [PATCH 03/12] gdb: constify breakpoint::print_it parameter Simon Marchi
2023-05-11 14:48 ` [PATCH 04/12] gdb: add breakpoint "has locations" methods Simon Marchi
2023-05-11 14:48 ` Simon Marchi [this message]
2023-05-18 12:50 ` [PATCH 05/12] gdb: add breakpoint::first_loc methods Andrew Burgess
2023-05-18 17:55 ` Simon Marchi
2023-05-24 13:00 ` Andrew Burgess
2023-05-11 14:48 ` [PATCH 06/12] gdbsupport: add missing increment/decrement operators to reference_to_pointer_iterator Simon Marchi
2023-05-11 14:48 ` [PATCH 07/12] gdb: link breakpoint locations with intrusive_list Simon Marchi
2023-05-18 14:44 ` Andrew Burgess
2023-05-18 18:40 ` Simon Marchi
2023-05-24 13:04 ` Andrew Burgess
2023-05-11 14:48 ` [PATCH 08/12] gdb: remove bp_location_pointer_iterator Simon Marchi
2023-05-11 14:48 ` [PATCH 09/12] gdb: link breakpoints with intrusive_list Simon Marchi
2023-05-11 14:48 ` [PATCH 10/12] gdbsupport: make basic_safe_iterator::operator* return the same thing as underlying iterator Simon Marchi
2023-05-11 14:48 ` [PATCH 11/12] gdbsupport: make filtered_iterator::operator* " Simon Marchi
2023-05-11 14:48 ` [PATCH 12/12] gdb: remove breakpoint_pointer_iterator Simon Marchi
2023-05-18 15:53 ` Andrew Burgess
2023-05-18 18:44 ` Simon Marchi
2023-05-18 20:59 ` Simon Marchi
2023-05-18 15:54 ` [PATCH 00/12] Use intrusive_list for breakpoints and breakpoint locations Andrew Burgess
2023-05-18 21:01 ` Simon Marchi
2023-05-25 14:01 ` Simon Marchi
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