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* [binutils-gdb] Move add_location(sal) to base_breakpoint
@ 2022-05-20 19:43 Pedro Alves
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From: Pedro Alves @ 2022-05-20 19:43 UTC (permalink / raw)
To: gdb-cvs
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=960bc2bd1402bb5e8312e731d6a7f6fe2b6a9863
commit 960bc2bd1402bb5e8312e731d6a7f6fe2b6a9863
Author: Pedro Alves <pedro@palves.net>
Date: Thu May 12 18:58:38 2022 +0100
Move add_location(sal) to base_breakpoint
After the previous patches, only base_breakpoint subclasses use
add_location(sal), so we can move it to base_breakpoint (a.k.a. base
class for code breakpoints).
This requires a few casts here and there, but always at spots where
you can see from context what the breakpoint's type actually is.
I inlined new_single_step_breakpoint into its only caller exactly for
this reason.
I did try to propagate more use of base_breakpoint to avoid casts, but
that turned out unwieldy for this patch.
Change-Id: I49d959322b0fdce5a88a216bb44730fc5dd7c6f8
Diff:
---
gdb/breakpoint.c | 45 +++++++++++++++++++--------------------------
gdb/breakpoint.h | 8 ++++----
gdb/elfread.c | 6 +++---
gdb/minsyms.c | 4 ++--
gdb/symtab.h | 5 +++--
5 files changed, 31 insertions(+), 37 deletions(-)
diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c
index bfb5cd37ecd..b6e31836df1 100644
--- a/gdb/breakpoint.c
+++ b/gdb/breakpoint.c
@@ -87,7 +87,7 @@
static void map_breakpoint_numbers (const char *,
gdb::function_view<void (breakpoint *)>);
-static void breakpoint_re_set_default (struct breakpoint *);
+static void breakpoint_re_set_default (base_breakpoint *);
static void
create_sals_from_location_default (struct event_location *location,
@@ -5860,10 +5860,10 @@ bpstat_run_callbacks (bpstat *bs_head)
handle_jit_event (bs->bp_location_at->address);
break;
case bp_gnu_ifunc_resolver:
- gnu_ifunc_resolver_stop (b);
+ gnu_ifunc_resolver_stop ((base_breakpoint *) b);
break;
case bp_gnu_ifunc_resolver_return:
- gnu_ifunc_resolver_return_stop (b);
+ gnu_ifunc_resolver_return_stop ((base_breakpoint *) b);
break;
}
}
@@ -7867,24 +7867,6 @@ enable_breakpoints_after_startup (void)
breakpoint_re_set ();
}
-/* Create a new single-step breakpoint for thread THREAD, with no
- locations. */
-
-static struct breakpoint *
-new_single_step_breakpoint (int thread, struct gdbarch *gdbarch)
-{
- std::unique_ptr<breakpoint> b (new momentary_breakpoint (gdbarch,
- bp_single_step));
-
- b->disposition = disp_donttouch;
- b->frame_id = null_frame_id;
-
- b->thread = thread;
- gdb_assert (b->thread != 0);
-
- return add_to_breakpoint_chain (std::move (b));
-}
-
/* Allocate a new momentary breakpoint. */
static momentary_breakpoint *
@@ -8057,7 +8039,7 @@ handle_automatic_hardware_breakpoints (bp_location *bl)
}
bp_location *
-breakpoint::add_location (const symtab_and_line &sal)
+base_breakpoint::add_location (const symtab_and_line &sal)
{
struct bp_location *new_loc, **tmp;
CORE_ADDR adjusted_address;
@@ -12476,7 +12458,7 @@ hoist_existing_locations (struct breakpoint *b, struct program_space *pspace)
untouched. */
void
-update_breakpoint_locations (struct breakpoint *b,
+update_breakpoint_locations (base_breakpoint *b,
struct program_space *filter_pspace,
gdb::array_view<const symtab_and_line> sals,
gdb::array_view<const symtab_and_line> sals_end)
@@ -12684,7 +12666,7 @@ location_to_sals (struct breakpoint *b, struct event_location *location,
locations. */
static void
-breakpoint_re_set_default (struct breakpoint *b)
+breakpoint_re_set_default (base_breakpoint *b)
{
struct program_space *filter_pspace = current_program_space;
std::vector<symtab_and_line> expanded, expanded_end;
@@ -13395,15 +13377,26 @@ insert_single_step_breakpoint (struct gdbarch *gdbarch,
if (tp->control.single_step_breakpoints == NULL)
{
+ std::unique_ptr<breakpoint> b
+ (new momentary_breakpoint (gdbarch, bp_single_step));
+
+ b->disposition = disp_donttouch;
+
+ b->thread = tp->global_num;
+ gdb_assert (b->thread != 0);
+
tp->control.single_step_breakpoints
- = new_single_step_breakpoint (tp->global_num, gdbarch);
+ = add_to_breakpoint_chain (std::move (b));
}
sal = find_pc_line (pc, 0);
sal.pc = pc;
sal.section = find_pc_overlay (pc);
sal.explicit_pc = 1;
- tp->control.single_step_breakpoints->add_location (sal);
+
+ auto *ss_bp
+ = static_cast<momentary_breakpoint *> (tp->control.single_step_breakpoints);
+ ss_bp->add_location (sal);
update_global_location_list (UGLL_INSERT);
}
diff --git a/gdb/breakpoint.h b/gdb/breakpoint.h
index af69af6863b..807c97a5bed 100644
--- a/gdb/breakpoint.h
+++ b/gdb/breakpoint.h
@@ -733,9 +733,6 @@ struct breakpoint
/* Nothing to do. */
}
- /* Add a location for SAL to this breakpoint. */
- bp_location *add_location (const symtab_and_line &sal);
-
/* Return a range of this breakpoint's locations. */
bp_location_range locations () const;
@@ -874,6 +871,9 @@ struct base_breakpoint : public breakpoint
~base_breakpoint () override = 0;
+ /* Add a location for SAL to this breakpoint. */
+ bp_location *add_location (const symtab_and_line &sal);
+
void re_set () override;
int insert_location (struct bp_location *) override;
int remove_location (struct bp_location *,
@@ -1383,7 +1383,7 @@ extern void until_break_command (const char *, int, int);
/* Initialize a struct bp_location. */
extern void update_breakpoint_locations
- (struct breakpoint *b,
+ (base_breakpoint *b,
struct program_space *filter_pspace,
gdb::array_view<const symtab_and_line> sals,
gdb::array_view<const symtab_and_line> sals_end);
diff --git a/gdb/elfread.c b/gdb/elfread.c
index b136c605b1a..27203722802 100644
--- a/gdb/elfread.c
+++ b/gdb/elfread.c
@@ -927,7 +927,7 @@ elf_gnu_ifunc_resolve_addr (struct gdbarch *gdbarch, CORE_ADDR pc)
/* Handle inferior hit of bp_gnu_ifunc_resolver, see its definition. */
static void
-elf_gnu_ifunc_resolver_stop (struct breakpoint *b)
+elf_gnu_ifunc_resolver_stop (base_breakpoint *b)
{
struct breakpoint *b_return;
struct frame_info *prev_frame = get_prev_frame (get_current_frame ());
@@ -978,7 +978,7 @@ elf_gnu_ifunc_resolver_stop (struct breakpoint *b)
/* Handle inferior hit of bp_gnu_ifunc_resolver_return, see its definition. */
static void
-elf_gnu_ifunc_resolver_return_stop (struct breakpoint *b)
+elf_gnu_ifunc_resolver_return_stop (base_breakpoint *b)
{
thread_info *thread = inferior_thread ();
struct gdbarch *gdbarch = get_frame_arch (get_current_frame ());
@@ -1008,7 +1008,7 @@ elf_gnu_ifunc_resolver_return_stop (struct breakpoint *b)
"gnu-indirect-function breakpoint type %d"),
(int) b->type);
}
- b = b_next;
+ b = (base_breakpoint *) b_next;
}
gdb_assert (b->type == bp_gnu_ifunc_resolver);
gdb_assert (b->loc->next == NULL);
diff --git a/gdb/minsyms.c b/gdb/minsyms.c
index cbd0ad22392..217ee047446 100644
--- a/gdb/minsyms.c
+++ b/gdb/minsyms.c
@@ -1019,7 +1019,7 @@ stub_gnu_ifunc_resolve_name (const char *function_name,
/* See elf_gnu_ifunc_resolver_stop for its real implementation. */
static void
-stub_gnu_ifunc_resolver_stop (struct breakpoint *b)
+stub_gnu_ifunc_resolver_stop (base_breakpoint *b)
{
internal_error (__FILE__, __LINE__,
_("elf_gnu_ifunc_resolver_stop cannot be reached."));
@@ -1028,7 +1028,7 @@ stub_gnu_ifunc_resolver_stop (struct breakpoint *b)
/* See elf_gnu_ifunc_resolver_return_stop for its real implementation. */
static void
-stub_gnu_ifunc_resolver_return_stop (struct breakpoint *b)
+stub_gnu_ifunc_resolver_return_stop (base_breakpoint *b)
{
internal_error (__FILE__, __LINE__,
_("elf_gnu_ifunc_resolver_return_stop cannot be reached."));
diff --git a/gdb/symtab.h b/gdb/symtab.h
index b1cf84f756f..5218be587de 100644
--- a/gdb/symtab.h
+++ b/gdb/symtab.h
@@ -55,6 +55,7 @@ struct obj_section;
struct cmd_list_element;
class probe;
struct lookup_name_info;
+struct base_breakpoint;
/* How to match a lookup name against a symbol search name. */
enum class symbol_name_match_type
@@ -2227,10 +2228,10 @@ struct gnu_ifunc_fns
CORE_ADDR *function_address_p);
/* See elf_gnu_ifunc_resolver_stop for its real implementation. */
- void (*gnu_ifunc_resolver_stop) (struct breakpoint *b);
+ void (*gnu_ifunc_resolver_stop) (base_breakpoint *b);
/* See elf_gnu_ifunc_resolver_return_stop for its real implementation. */
- void (*gnu_ifunc_resolver_return_stop) (struct breakpoint *b);
+ void (*gnu_ifunc_resolver_return_stop) (base_breakpoint *b);
};
#define gnu_ifunc_resolve_addr gnu_ifunc_fns_p->gnu_ifunc_resolve_addr
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