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* [binutils-gdb] Eliminate the two-level data structures behind location_specs
@ 2022-06-17 9:23 Pedro Alves
0 siblings, 0 replies; only message in thread
From: Pedro Alves @ 2022-06-17 9:23 UTC (permalink / raw)
To: gdb-cvs
https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=40d97ee21fc3e39db73ee8f84b847a22f9d251cc
commit 40d97ee21fc3e39db73ee8f84b847a22f9d251cc
Author: Pedro Alves <pedro@palves.net>
Date: Fri May 27 13:13:41 2022 +0100
Eliminate the two-level data structures behind location_specs
Currently, there's the location_spec hierarchy, and then some
location_spec subclasses have their own struct type holding all their
data fields.
I.e., there is this:
location_spec
explicit_location_spec
linespec_location_spec
address_location_spec
probe_location_spec
and then these separate types:
explicit_location
linespec_location
where:
explicit_location_spec
has-a explicit_location
linespec_location_spec
has-a linespec_location
This patch eliminates explicit_location and linespec_location,
inlining their members in the corresponding location_spec type.
The location_spec subclasses were the ones currently defined in
location.c, so they are moved to the header. Since the definitions of
the classes are now visible, we no longer need location_spec_deleter.
Some constructors that are used for cloning location_specs, like:
explicit explicit_location_spec (const struct explicit_location *loc)
... were converted to proper copy ctors.
In the process, initialize_explicit_location is eliminated, and some
functions that returned the "data type behind a locspec", like
get_linespec_location are converted to downcast functions, like
as_linespec_location_spec.
Change-Id: Ia31ccef9382b25a52b00fa878c8df9b8cf2a6c5a
Diff:
---
gdb/break-catch-throw.c | 9 +-
gdb/breakpoint.c | 44 ++--
gdb/completer.c | 6 +-
gdb/linespec.c | 106 +++++-----
gdb/location.c | 512 +++++++++++++++++----------------------------
gdb/location.h | 233 +++++++++++++++------
gdb/mi/mi-cmd-break.c | 25 ++-
gdb/probe.c | 2 +-
gdb/python/py-breakpoint.c | 21 +-
9 files changed, 452 insertions(+), 506 deletions(-)
diff --git a/gdb/break-catch-throw.c b/gdb/break-catch-throw.c
index 3ef4b972d4f..2eb24f3b76c 100644
--- a/gdb/break-catch-throw.c
+++ b/gdb/break-catch-throw.c
@@ -225,12 +225,9 @@ exception_catchpoint::re_set ()
catchpoint mode. */
try
{
- struct explicit_location explicit_loc;
-
- initialize_explicit_location (&explicit_loc);
- explicit_loc.function_name
- = ASTRDUP (exception_functions[kind].function);
- location_spec_up locspec = new_explicit_location_spec (&explicit_loc);
+ location_spec_up locspec
+ = (new_explicit_location_spec_function
+ (exception_functions[kind].function));
sals = this->decode_location_spec (locspec.get (), filter_pspace);
}
catch (const gdb_exception_error &ex)
diff --git a/gdb/breakpoint.c b/gdb/breakpoint.c
index ab88a38e0a3..82937a3b78a 100644
--- a/gdb/breakpoint.c
+++ b/gdb/breakpoint.c
@@ -3364,7 +3364,6 @@ create_overlay_event_breakpoint (void)
struct breakpoint *b;
struct breakpoint_objfile_data *bp_objfile_data;
CORE_ADDR addr;
- struct explicit_location explicit_loc;
bp_objfile_data = get_breakpoint_objfile_data (objfile);
@@ -3388,9 +3387,7 @@ create_overlay_event_breakpoint (void)
addr = bp_objfile_data->overlay_msym.value_address ();
b = create_internal_breakpoint (objfile->arch (), addr,
bp_overlay_event);
- initialize_explicit_location (&explicit_loc);
- explicit_loc.function_name = ASTRDUP (func_name);
- b->locspec = new_explicit_location_spec (&explicit_loc);
+ b->locspec = new_explicit_location_spec_function (func_name);
if (overlay_debugging == ovly_auto)
{
@@ -3473,7 +3470,6 @@ create_longjmp_master_breakpoint_names (objfile *objfile)
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;
@@ -3495,9 +3491,7 @@ create_longjmp_master_breakpoint_names (objfile *objfile)
addr = bp_objfile_data->longjmp_msym[i].value_address ();
b = create_internal_breakpoint (gdbarch, addr, bp_longjmp_master);
- initialize_explicit_location (&explicit_loc);
- explicit_loc.function_name = ASTRDUP (func_name);
- b->locspec = new_explicit_location_spec (&explicit_loc);
+ b->locspec = new_explicit_location_spec_function (func_name);
b->enable_state = bp_disabled;
installed_bp++;
}
@@ -3553,7 +3547,6 @@ create_std_terminate_master_breakpoint (void)
{
struct breakpoint *b;
struct breakpoint_objfile_data *bp_objfile_data;
- struct explicit_location explicit_loc;
bp_objfile_data = get_breakpoint_objfile_data (objfile);
@@ -3578,9 +3571,7 @@ create_std_terminate_master_breakpoint (void)
addr = bp_objfile_data->terminate_msym.value_address ();
b = create_internal_breakpoint (objfile->arch (), addr,
bp_std_terminate_master);
- initialize_explicit_location (&explicit_loc);
- explicit_loc.function_name = ASTRDUP (func_name);
- b->locspec = new_explicit_location_spec (&explicit_loc);
+ b->locspec = new_explicit_location_spec_function (func_name);
b->enable_state = bp_disabled;
}
}
@@ -3648,7 +3639,6 @@ create_exception_master_breakpoint_hook (objfile *objfile)
struct gdbarch *gdbarch;
struct breakpoint_objfile_data *bp_objfile_data;
CORE_ADDR addr;
- struct explicit_location explicit_loc;
bp_objfile_data = get_breakpoint_objfile_data (objfile);
@@ -3675,9 +3665,7 @@ create_exception_master_breakpoint_hook (objfile *objfile)
addr = gdbarch_convert_from_func_ptr_addr
(gdbarch, addr, current_inferior ()->top_target ());
b = create_internal_breakpoint (gdbarch, addr, bp_exception_master);
- initialize_explicit_location (&explicit_loc);
- explicit_loc.function_name = ASTRDUP (func_name);
- b->locspec = new_explicit_location_spec (&explicit_loc);
+ b->locspec = new_explicit_location_spec_function (func_name);
b->enable_state = bp_disabled;
return true;
@@ -8467,7 +8455,7 @@ parse_breakpoint_sals (location_spec *locspec,
if (location_spec_type (locspec) == LINESPEC_LOCATION_SPEC)
{
- const char *spec = get_linespec_location (locspec)->spec_string;
+ const char *spec = as_linespec_location_spec (locspec)->spec_string;
if (spec == NULL)
{
@@ -8518,7 +8506,7 @@ parse_breakpoint_sals (location_spec *locspec,
const char *spec = NULL;
if (location_spec_type (locspec) == LINESPEC_LOCATION_SPEC)
- spec = get_linespec_location (locspec)->spec_string;
+ spec = as_linespec_location_spec (locspec)->spec_string;
if (!cursal.symtab
|| (spec != NULL
@@ -12005,7 +11993,7 @@ strace_marker_create_sals_from_location_spec (location_spec *locspec,
struct linespec_sals lsal;
const char *arg_start, *arg;
- arg = arg_start = get_linespec_location (locspec)->spec_string;
+ arg = arg_start = as_linespec_location_spec (locspec)->spec_string;
lsal.sals = decode_static_tracepoint_spec (&arg);
std::string str (arg_start, arg - arg_start);
@@ -12073,7 +12061,7 @@ std::vector<symtab_and_line>
static_marker_tracepoint::decode_location_spec (location_spec *locspec,
program_space *search_pspace)
{
- const char *s = get_linespec_location (locspec)->spec_string;
+ const char *s = as_linespec_location_spec (locspec)->spec_string;
std::vector<symtab_and_line> sals = decode_static_tracepoint_spec (&s);
if (sals.size () > static_trace_marker_id_idx)
@@ -12381,7 +12369,6 @@ update_static_tracepoint (struct breakpoint *b, struct symtab_and_line sal)
struct symbol *sym;
struct static_tracepoint_marker *tpmarker;
struct ui_out *uiout = current_uiout;
- struct explicit_location explicit_loc;
tpmarker = &markers[0];
@@ -12418,13 +12405,14 @@ update_static_tracepoint (struct breakpoint *b, struct symtab_and_line sal)
b->loc->line_number = sal2.line;
b->loc->symtab = sym != NULL ? sal2.symtab : NULL;
- b->locspec.reset (nullptr);
- initialize_explicit_location (&explicit_loc);
- explicit_loc.source_filename
- = ASTRDUP (symtab_to_filename_for_display (sal2.symtab));
- explicit_loc.line_offset.offset = b->loc->line_number;
- explicit_loc.line_offset.sign = LINE_OFFSET_NONE;
- b->locspec = new_explicit_location_spec (&explicit_loc);
+ 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.sign = LINE_OFFSET_NONE;
+
+ b->locspec = std::move (els);
/* Might be nice to check if function changed, and warn if
so. */
diff --git a/gdb/completer.c b/gdb/completer.c
index 2ec8d2eb594..b68b6de2057 100644
--- a/gdb/completer.c
+++ b/gdb/completer.c
@@ -712,8 +712,8 @@ collect_explicit_location_matches (completion_tracker &tracker,
const char *word,
const struct language_defn *language)
{
- const struct explicit_location *explicit_loc
- = get_explicit_location (locspec);
+ const explicit_location_spec *explicit_loc
+ = as_explicit_location_spec (locspec);
/* True if the option expects an argument. */
bool needs_arg = true;
@@ -1008,7 +1008,7 @@ location_completer (struct cmd_list_element *ignore,
text = copy;
symbol_name_match_type match_type
- = get_explicit_location (locspec.get ())->func_name_match_type;
+ = as_explicit_location_spec (locspec.get ())->func_name_match_type;
complete_address_and_linespec_locations (tracker, text, match_type);
}
}
diff --git a/gdb/linespec.c b/gdb/linespec.c
index b12f5c87733..063944bb9a1 100644
--- a/gdb/linespec.c
+++ b/gdb/linespec.c
@@ -94,8 +94,8 @@ struct address_entry
struct linespec
{
- /* An explicit location describing the SaLs. */
- struct explicit_location explicit_loc {};
+ /* An explicit location spec describing the SaLs. */
+ explicit_location_spec explicit_loc;
/* The list of symtabs to search to which to limit the search.
@@ -342,8 +342,8 @@ struct linespec_parser
struct completion_tracker *completion_tracker = nullptr;
};
-/* A convenience macro for accessing the explicit location result of
- the parser. */
+/* A convenience macro for accessing the explicit location spec result
+ of the parser. */
#define PARSER_EXPLICIT(PPTR) (&PARSER_RESULT ((PPTR))->explicit_loc)
/* Prototypes for local functions. */
@@ -1990,18 +1990,14 @@ linespec_parse_basic (linespec_parser *parser)
static void
canonicalize_linespec (struct linespec_state *state, const linespec *ls)
{
- location_spec *canon;
- struct explicit_location *explicit_loc;
-
/* If canonicalization was not requested, no need to do anything. */
if (!state->canonical)
return;
/* Save everything as an explicit location. */
- state->canonical->locspec
- = new_explicit_location_spec (&ls->explicit_loc);
- canon = state->canonical->locspec.get ();
- explicit_loc = get_explicit_location (canon);
+ state->canonical->locspec = ls->explicit_loc.clone ();
+ explicit_location_spec *explicit_loc
+ = as_explicit_location_spec (state->canonical->locspec.get ());
if (explicit_loc->label_name != NULL)
{
@@ -2019,8 +2015,7 @@ canonicalize_linespec (struct linespec_state *state, const linespec *ls)
/* If this location originally came from a linespec, save a string
representation of it for display and saving to file. */
if (state->is_linespec)
- set_location_spec_string (canon,
- explicit_location_to_linespec (explicit_loc));
+ set_location_spec_string (explicit_loc, explicit_loc->to_linespec ());
}
/* Given a line offset in LS, construct the relevant SALs. */
@@ -2307,17 +2302,18 @@ convert_linespec_to_sals (struct linespec_state *state, linespec *ls)
return sals;
}
-/* Build RESULT from the explicit location components SOURCE_FILENAME,
- FUNCTION_NAME, LABEL_NAME and LINE_OFFSET. */
+/* Build RESULT from the explicit location spec components
+ SOURCE_FILENAME, FUNCTION_NAME, LABEL_NAME and LINE_OFFSET. */
static void
-convert_explicit_location_to_linespec (struct linespec_state *self,
- linespec *result,
- const char *source_filename,
- const char *function_name,
- symbol_name_match_type fname_match_type,
- const char *label_name,
- struct line_offset line_offset)
+convert_explicit_location_spec_to_linespec
+ (struct linespec_state *self,
+ linespec *result,
+ const char *source_filename,
+ const char *function_name,
+ symbol_name_match_type fname_match_type,
+ const char *label_name,
+ struct line_offset line_offset)
{
std::vector<bound_minimal_symbol> minimal_symbols;
@@ -2382,16 +2378,17 @@ convert_explicit_location_to_linespec (struct linespec_state *self,
/* Convert the explicit location EXPLICIT_LOC into SaLs. */
static std::vector<symtab_and_line>
-convert_explicit_location_to_sals (struct linespec_state *self,
- linespec *result,
- const struct explicit_location *explicit_loc)
+convert_explicit_location_spec_to_sals
+ (struct linespec_state *self,
+ linespec *result,
+ const explicit_location_spec *explicit_spec)
{
- convert_explicit_location_to_linespec (self, result,
- explicit_loc->source_filename,
- explicit_loc->function_name,
- explicit_loc->func_name_match_type,
- explicit_loc->label_name,
- explicit_loc->line_offset);
+ convert_explicit_location_spec_to_linespec (self, result,
+ explicit_spec->source_filename,
+ explicit_spec->function_name,
+ explicit_spec->func_name_match_type,
+ explicit_spec->label_name,
+ explicit_spec->line_offset);
return convert_linespec_to_sals (self, result);
}
@@ -2694,10 +2691,6 @@ linespec_state_destructor (struct linespec_state *self)
linespec_parser::~linespec_parser ()
{
- xfree (PARSER_EXPLICIT (this)->source_filename);
- xfree (PARSER_EXPLICIT (this)->label_name);
- xfree (PARSER_EXPLICIT (this)->function_name);
-
linespec_state_destructor (PARSER_STATE (this));
}
@@ -2855,12 +2848,12 @@ linespec_complete_label (completion_tracker &tracker,
try
{
- convert_explicit_location_to_linespec (PARSER_STATE (&parser),
- PARSER_RESULT (&parser),
- source_filename,
- function_name,
- func_name_match_type,
- NULL, unknown_offset);
+ convert_explicit_location_spec_to_linespec (PARSER_STATE (&parser),
+ PARSER_RESULT (&parser),
+ source_filename,
+ function_name,
+ func_name_match_type,
+ NULL, unknown_offset);
}
catch (const gdb_exception_error &ex)
{
@@ -3073,24 +3066,18 @@ location_spec_to_sals (linespec_parser *parser,
{
case LINESPEC_LOCATION_SPEC:
{
+ const linespec_location_spec *ls = as_linespec_location_spec (locspec);
PARSER_STATE (parser)->is_linespec = 1;
- try
- {
- const linespec_location *ls = get_linespec_location (locspec);
- result = parse_linespec (parser,
- ls->spec_string, ls->match_type);
- }
- catch (const gdb_exception_error &except)
- {
- throw;
- }
+ result = parse_linespec (parser, ls->spec_string, ls->match_type);
}
break;
case ADDRESS_LOCATION_SPEC:
{
- const char *addr_string = get_address_string_location (locspec);
- CORE_ADDR addr = get_address_location (locspec);
+ const address_location_spec *addr_spec
+ = as_address_location_spec (locspec);
+ const char *addr_string = addr_spec->to_string ();
+ CORE_ADDR addr;
if (addr_string != NULL)
{
@@ -3099,6 +3086,8 @@ location_spec_to_sals (linespec_parser *parser,
PARSER_STATE (parser)->canonical->locspec
= copy_location_spec (locspec);
}
+ else
+ addr = addr_spec->address;
result = convert_address_location_to_sals (PARSER_STATE (parser),
addr);
@@ -3107,12 +3096,11 @@ location_spec_to_sals (linespec_parser *parser,
case EXPLICIT_LOCATION_SPEC:
{
- const struct explicit_location *explicit_loc;
-
- explicit_loc = get_explicit_location_const (locspec);
- result = convert_explicit_location_to_sals (PARSER_STATE (parser),
- PARSER_RESULT (parser),
- explicit_loc);
+ const explicit_location_spec *explicit_locspec
+ = as_explicit_location_spec (locspec);
+ result = convert_explicit_location_spec_to_sals (PARSER_STATE (parser),
+ PARSER_RESULT (parser),
+ explicit_locspec);
}
break;
diff --git a/gdb/location.c b/gdb/location.c
index 14a5aebff17..4d0b60ff9c7 100644
--- a/gdb/location.c
+++ b/gdb/location.c
@@ -29,280 +29,187 @@
#include <ctype.h>
#include <string.h>
-static std::string explicit_location_to_string
- (const struct explicit_location *explicit_loc);
+static std::string
+ explicit_to_string_internal (bool as_linespec,
+ const explicit_location_spec *explicit_loc);
+
+/* Return a xstrdup of STR if not NULL, otherwise return NULL. */
-/* The base class for all location specs used to match actual
- locations in the inferior. */
+static char *
+maybe_xstrdup (const char *str)
+{
+ return (str != nullptr ? xstrdup (str) : nullptr);
+}
+
+probe_location_spec::probe_location_spec (std::string &&probe)
+ : location_spec (PROBE_LOCATION_SPEC, std::move (probe))
+{
+}
-struct location_spec
+location_spec_up
+probe_location_spec::clone () const
{
- virtual ~location_spec () = default;
-
- /* Clone this object. */
- virtual location_spec_up clone () const = 0;
-
- /* Return true if this location spec is empty, false otherwise. */
- virtual bool empty_p () const = 0;
-
- /* Return a string representation of this location. */
- const char *to_string () const
- {
- if (as_string.empty ())
- as_string = compute_string ();
- if (as_string.empty ())
- return nullptr;
- return as_string.c_str ();
- }
-
- DISABLE_COPY_AND_ASSIGN (location_spec);
-
- /* The type of this location specification. */
- enum location_spec_type type;
-
- /* Cached string representation of this location spec. This is
- used, e.g., to save location specs to file. */
- mutable std::string as_string;
-
-protected:
-
- explicit location_spec (enum location_spec_type t)
- : type (t)
- {
- }
-
- location_spec (enum location_spec_type t, std::string &&str)
- : type (t),
- as_string (std::move (str))
- {
- }
-
- explicit location_spec (const location_spec *to_clone)
- : type (to_clone->type),
- as_string (to_clone->as_string)
- {
- }
-
- /* Compute the string representation of this object. This is called
- by to_string when needed. */
- virtual std::string compute_string () const = 0;
-};
-
-/* A probe. */
-struct probe_location_spec : public location_spec
+ return location_spec_up (new probe_location_spec (*this));
+}
+
+bool
+probe_location_spec::empty_p () const
{
- explicit probe_location_spec (std::string &&probe)
- : location_spec (PROBE_LOCATION_SPEC, std::move (probe))
- {
- }
-
- location_spec_up clone () const override
- {
- return location_spec_up (new probe_location_spec (this));
- }
-
- bool empty_p () const override
- {
- return false;
- }
-
-protected:
-
- explicit probe_location_spec (const probe_location_spec *to_clone)
- : location_spec (to_clone)
- {
- }
-
- std::string compute_string () const override
- {
- return std::move (as_string);
- }
-};
+ return false;
+}
+
+std::string probe_location_spec::compute_string () const
+{
+ return std::move (as_string);
+}
/* A "normal" linespec. */
-struct linespec_location_spec : public location_spec
+linespec_location_spec::linespec_location_spec
+ (const char **linespec, symbol_name_match_type match_type_)
+ : location_spec (LINESPEC_LOCATION_SPEC),
+ match_type (match_type_)
{
- linespec_location_spec (const char **linespec,
- symbol_name_match_type match_type)
- : location_spec (LINESPEC_LOCATION_SPEC)
- {
- linespec_location.match_type = match_type;
- if (*linespec != NULL)
- {
- const char *p;
- const char *orig = *linespec;
-
- linespec_lex_to_end (linespec);
- p = remove_trailing_whitespace (orig, *linespec);
-
- /* If there is no valid linespec then this will leave the
- spec_string as nullptr. This behaviour is relied on in the
- breakpoint setting code, where spec_string being nullptr means
- to use the default breakpoint location. */
- if ((p - orig) > 0)
- linespec_location.spec_string = savestring (orig, p - orig);
- }
- }
-
- ~linespec_location_spec ()
- {
- xfree (linespec_location.spec_string);
- }
-
- location_spec_up clone () const override
- {
- return location_spec_up (new linespec_location_spec (this));
- }
-
- bool empty_p () const override
- {
- return false;
- }
-
- struct linespec_location linespec_location {};
-
-protected:
-
- explicit linespec_location_spec (const linespec_location_spec *to_clone)
- : location_spec (to_clone),
- linespec_location (to_clone->linespec_location)
- {
- if (linespec_location.spec_string != nullptr)
- linespec_location.spec_string = xstrdup (linespec_location.spec_string);
- }
-
- std::string compute_string () const override
- {
- if (linespec_location.spec_string != nullptr)
- {
- const struct linespec_location *ls = &linespec_location;
- if (ls->match_type == symbol_name_match_type::FULL)
- return std::string ("-qualified ") + ls->spec_string;
- else
- return ls->spec_string;
- }
- return {};
- }
-};
-
-/* An address in the inferior. */
-struct address_location_spec : public location_spec
+ if (*linespec != NULL)
+ {
+ const char *p;
+ const char *orig = *linespec;
+
+ linespec_lex_to_end (linespec);
+ p = remove_trailing_whitespace (orig, *linespec);
+
+ /* If there is no valid linespec then this will leave the
+ spec_string as nullptr. This behaviour is relied on in the
+ breakpoint setting code, where spec_string being nullptr means
+ to use the default breakpoint location. */
+ if ((p - orig) > 0)
+ spec_string = savestring (orig, p - orig);
+ }
+}
+
+linespec_location_spec::~linespec_location_spec ()
{
- address_location_spec (CORE_ADDR addr, const char *addr_string,
- int addr_string_len)
- : location_spec (ADDRESS_LOCATION_SPEC),
- address (addr)
- {
- if (addr_string != nullptr)
- as_string = std::string (addr_string, addr_string_len);
- }
-
- location_spec_up clone () const override
- {
- return location_spec_up (new address_location_spec (this));
- }
-
- bool empty_p () const override
- {
- return false;
- }
-
- CORE_ADDR address;
-
-protected:
-
- address_location_spec (const address_location_spec *to_clone)
- : location_spec (to_clone),
- address (to_clone->address)
- {
- }
-
- std::string compute_string () const override
- {
- const char *addr_string = core_addr_to_string (address);
- return std::string ("*") + addr_string;
- }
-};
-
-/* An explicit location spec. */
-struct explicit_location_spec : public location_spec
+ xfree (spec_string);
+}
+
+location_spec_up
+linespec_location_spec::clone () const
{
- explicit explicit_location_spec (const struct explicit_location *loc)
- : location_spec (EXPLICIT_LOCATION_SPEC)
- {
- copy_loc (loc);
- }
-
- ~explicit_location_spec ()
- {
- xfree (explicit_loc.source_filename);
- xfree (explicit_loc.function_name);
- xfree (explicit_loc.label_name);
- }
-
- location_spec_up clone () const override
- {
- return location_spec_up (new explicit_location_spec (this));
- }
-
- bool empty_p () const override
- {
- return (explicit_loc.source_filename == nullptr
- && explicit_loc.function_name == nullptr
- && explicit_loc.label_name == nullptr
- && explicit_loc.line_offset.sign == LINE_OFFSET_UNKNOWN);
- }
-
- struct explicit_location explicit_loc;
-
-protected:
-
- explicit explicit_location_spec (const explicit_location_spec *to_clone)
- : location_spec (to_clone)
- {
- copy_loc (&to_clone->explicit_loc);
- }
-
- std::string compute_string () const override
- {
- return explicit_location_to_string (&explicit_loc);
- }
-
-private:
-
- void copy_loc (const struct explicit_location *loc)
- {
- initialize_explicit_location (&explicit_loc);
- if (loc != nullptr)
- {
- explicit_loc.func_name_match_type = loc->func_name_match_type;
- if (loc->source_filename != nullptr)
- explicit_loc.source_filename = xstrdup (loc->source_filename);
- if (loc->function_name != nullptr)
- explicit_loc.function_name = xstrdup (loc->function_name);
- if (loc->label_name != nullptr)
- explicit_loc.label_name = xstrdup (loc->label_name);
- explicit_loc.line_offset = loc->line_offset;
- }
- }
-};
+ return location_spec_up (new linespec_location_spec (*this));
+}
-/* See description in location.h. */
+bool
+linespec_location_spec::empty_p () const
+{
+ return false;
+}
-enum location_spec_type
-location_spec_type (const location_spec *locspec)
+linespec_location_spec::linespec_location_spec
+ (const linespec_location_spec &other)
+ : location_spec (other),
+ match_type (other.match_type),
+ spec_string (maybe_xstrdup (other.spec_string))
{
- return locspec->type;
+}
+
+std::string
+linespec_location_spec::compute_string () const
+{
+ if (spec_string != nullptr)
+ {
+ if (match_type == symbol_name_match_type::FULL)
+ return std::string ("-qualified ") + spec_string;
+ else
+ return spec_string;
+ }
+ return {};
+}
+
+address_location_spec::address_location_spec (CORE_ADDR addr,
+ const char *addr_string,
+ int addr_string_len)
+ : location_spec (ADDRESS_LOCATION_SPEC),
+ address (addr)
+{
+ if (addr_string != nullptr)
+ as_string = std::string (addr_string, addr_string_len);
+}
+
+location_spec_up
+address_location_spec::clone () const
+{
+ return location_spec_up (new address_location_spec (*this));
+}
+
+bool
+address_location_spec::empty_p () const
+{
+ return false;
+}
+
+address_location_spec::address_location_spec
+ (const address_location_spec &other)
+ : location_spec (other),
+ address (other.address)
+{
+}
+
+std::string
+address_location_spec::compute_string () const
+{
+ const char *addr_string = core_addr_to_string (address);
+ return std::string ("*") + addr_string;
+}
+
+explicit_location_spec::explicit_location_spec ()
+ : location_spec (EXPLICIT_LOCATION_SPEC)
+{
+}
+
+explicit_location_spec::~explicit_location_spec ()
+{
+ xfree (source_filename);
+ xfree (function_name);
+ xfree (label_name);
+}
+
+explicit_location_spec::explicit_location_spec
+ (const explicit_location_spec &other)
+ : location_spec (other),
+ source_filename (maybe_xstrdup (other.source_filename)),
+ function_name (maybe_xstrdup (other.function_name)),
+ func_name_match_type (other.func_name_match_type),
+ label_name (maybe_xstrdup (other.label_name)),
+ line_offset (other.line_offset)
+{
+}
+
+location_spec_up
+explicit_location_spec::clone () const
+{
+ return location_spec_up (new explicit_location_spec (*this));
+}
+
+bool
+explicit_location_spec::empty_p () const
+{
+ return (source_filename == nullptr
+ && function_name == nullptr
+ && label_name == nullptr
+ && line_offset.sign == LINE_OFFSET_UNKNOWN);
+}
+
+std::string
+explicit_location_spec::compute_string () const
+{
+ return explicit_to_string_internal (false, this);
}
/* See description in location.h. */
-void
-initialize_explicit_location (struct explicit_location *explicit_loc)
+enum location_spec_type
+location_spec_type (const location_spec *locspec)
{
- memset (explicit_loc, 0, sizeof (struct explicit_location));
- explicit_loc->line_offset.sign = LINE_OFFSET_UNKNOWN;
- explicit_loc->func_name_match_type = symbol_name_match_type::WILD;
+ return locspec->type;
}
/* See description in location.h. */
@@ -317,11 +224,11 @@ new_linespec_location_spec (const char **linespec,
/* See description in location.h. */
-const linespec_location *
-get_linespec_location (const location_spec *locspec)
+const linespec_location_spec *
+as_linespec_location_spec (const location_spec *locspec)
{
gdb_assert (locspec->type == LINESPEC_LOCATION_SPEC);
- return &((linespec_location_spec *) locspec)->linespec_location;
+ return static_cast<const linespec_location_spec *> (locspec);
}
/* See description in location.h. */
@@ -336,20 +243,11 @@ new_address_location_spec (CORE_ADDR addr, const char *addr_string,
/* See description in location.h. */
-CORE_ADDR
-get_address_location (const location_spec *locspec)
+const address_location_spec *
+as_address_location_spec (const location_spec *locspec)
{
gdb_assert (locspec->type == ADDRESS_LOCATION_SPEC);
- return ((address_location_spec *) locspec)->address;
-}
-
-/* See description in location.h. */
-
-const char *
-get_address_string_location (const location_spec *locspec)
-{
- gdb_assert (locspec->type == ADDRESS_LOCATION_SPEC);
- return locspec->to_string ();
+ return static_cast<const address_location_spec *> (locspec);
}
/* See description in location.h. */
@@ -362,37 +260,29 @@ new_probe_location_spec (std::string &&probe)
/* See description in location.h. */
-const char *
-get_probe_location_spec_string (const location_spec *locspec)
+const probe_location_spec *
+as_probe_location_spec (const location_spec *locspec)
{
gdb_assert (locspec->type == PROBE_LOCATION_SPEC);
- return locspec->to_string ();
-}
-
-/* See description in location.h. */
-
-location_spec_up
-new_explicit_location_spec (const explicit_location *explicit_loc)
-{
- return location_spec_up (new explicit_location_spec (explicit_loc));
+ return static_cast<const probe_location_spec *> (locspec);
}
/* See description in location.h. */
-struct explicit_location *
-get_explicit_location (location_spec *locspec)
+const explicit_location_spec *
+as_explicit_location_spec (const location_spec *locspec)
{
gdb_assert (locspec->type == EXPLICIT_LOCATION_SPEC);
- return &((explicit_location_spec *) locspec)->explicit_loc;
+ return static_cast<const explicit_location_spec *> (locspec);
}
/* See description in location.h. */
-const struct explicit_location *
-get_explicit_location_const (const location_spec *locspec)
+explicit_location_spec *
+as_explicit_location_spec (location_spec *locspec)
{
gdb_assert (locspec->type == EXPLICIT_LOCATION_SPEC);
- return &((explicit_location_spec *) locspec)->explicit_loc;
+ return static_cast<explicit_location_spec *> (locspec);
}
/* Return a string representation of the explicit location spec in
@@ -403,7 +293,7 @@ get_explicit_location_const (const location_spec *locspec)
static std::string
explicit_to_string_internal (bool as_linespec,
- const struct explicit_location *explicit_loc)
+ const explicit_location_spec *explicit_loc)
{
bool need_space = false;
char space = as_linespec ? ':' : ' ';
@@ -457,18 +347,10 @@ explicit_to_string_internal (bool as_linespec,
/* See description in location.h. */
-static std::string
-explicit_location_to_string (const struct explicit_location *explicit_loc)
-{
- return explicit_to_string_internal (false, explicit_loc);
-}
-
-/* See description in location.h. */
-
std::string
-explicit_location_to_linespec (const struct explicit_location *explicit_loc)
+explicit_location_spec::to_linespec () const
{
- return explicit_to_string_internal (true, explicit_loc);
+ return explicit_to_string_internal (true, this);
}
/* See description in location.h. */
@@ -479,12 +361,6 @@ copy_location_spec (const location_spec *src)
return src->clone ();
}
-void
-location_spec_deleter::operator() (location_spec *locspec) const
-{
- delete locspec;
-}
-
/* See description in location.h. */
const char *
@@ -788,7 +664,7 @@ string_to_explicit_location_spec (const char **argp,
return NULL;
std::unique_ptr<explicit_location_spec> locspec
- (new explicit_location_spec ((const explicit_location *) nullptr));
+ (new explicit_location_spec ());
/* Process option/argument pairs. dprintf_command
requires that processing stop on ','. */
@@ -857,18 +733,17 @@ string_to_explicit_location_spec (const char **argp,
{
set_oarg (explicit_location_spec_lex_one (argp, language,
completion_info));
- locspec->explicit_loc.source_filename = oarg.release ();
+ locspec->source_filename = oarg.release ();
}
else if (strncmp (opt.get (), "-function", len) == 0)
{
set_oarg (explicit_location_spec_lex_one_function (argp, language,
completion_info));
- locspec->explicit_loc.function_name = oarg.release ();
+ locspec->function_name = oarg.release ();
}
else if (strncmp (opt.get (), "-qualified", len) == 0)
{
- locspec->explicit_loc.func_name_match_type
- = symbol_name_match_type::FULL;
+ locspec->func_name_match_type = symbol_name_match_type::FULL;
}
else if (strncmp (opt.get (), "-line", len) == 0)
{
@@ -876,8 +751,7 @@ string_to_explicit_location_spec (const char **argp,
*argp = skip_spaces (*argp);
if (have_oarg)
{
- locspec->explicit_loc.line_offset
- = linespec_parse_line_offset (oarg.get ());
+ locspec->line_offset = linespec_parse_line_offset (oarg.get ());
continue;
}
}
@@ -885,7 +759,7 @@ string_to_explicit_location_spec (const char **argp,
{
set_oarg (explicit_location_spec_lex_one (argp, language,
completion_info));
- locspec->explicit_loc.label_name = oarg.release ();
+ locspec->label_name = oarg.release ();
}
/* Only emit an "invalid argument" error for options
that look like option strings. */
@@ -915,10 +789,10 @@ string_to_explicit_location_spec (const char **argp,
/* One special error check: If a source filename was given
without offset, function, or label, issue an error. */
- if (locspec->explicit_loc.source_filename != NULL
- && locspec->explicit_loc.function_name == NULL
- && locspec->explicit_loc.label_name == NULL
- && (locspec->explicit_loc.line_offset.sign == LINE_OFFSET_UNKNOWN)
+ if (locspec->source_filename != NULL
+ && locspec->function_name == NULL
+ && locspec->label_name == NULL
+ && (locspec->line_offset.sign == LINE_OFFSET_UNKNOWN)
&& completion_info == NULL)
{
error (_("Source filename requires function, label, or "
@@ -1000,7 +874,7 @@ string_to_location_spec (const char **stringp,
explicit_location_spec *xloc
= dynamic_cast<explicit_location_spec *> (locspec.get ());
gdb_assert (xloc != nullptr);
- match_type = xloc->explicit_loc.func_name_match_type;
+ match_type = xloc->func_name_match_type;
}
/* Everything else is a "basic" linespec, address, or probe location
diff --git a/gdb/location.h b/gdb/location.h
index 602998de298..0a2f1799bc4 100644
--- a/gdb/location.h
+++ b/gdb/location.h
@@ -46,8 +46,8 @@ enum offset_relative_sign
struct line_offset
{
/* Line offset and any specified sign. */
- int offset;
- enum offset_relative_sign sign;
+ int offset = 0;
+ enum offset_relative_sign sign = LINE_OFFSET_UNKNOWN;
};
/* An enumeration of the various ways to specify a location spec. */
@@ -67,15 +67,104 @@ enum location_spec_type
PROBE_LOCATION_SPEC
};
-/* A traditional linespec. */
+/* A unique pointer for location_spec. */
+typedef std::unique_ptr<location_spec> location_spec_up;
+
+/* The base class for all location specs used to resolve actual
+ locations in the inferior. */
-struct linespec_location
+struct location_spec
{
+ virtual ~location_spec () = default;
+
+ /* Clone this object. */
+ virtual location_spec_up clone () const = 0;
+
+ /* Return true if this location spec is empty, false otherwise. */
+ virtual bool empty_p () const = 0;
+
+ /* Return a string representation of this location. */
+ const char *to_string () const
+ {
+ if (as_string.empty ())
+ as_string = compute_string ();
+ if (as_string.empty ())
+ return nullptr;
+ return as_string.c_str ();
+ }
+
+ /* The type of this location specification. */
+ enum location_spec_type type;
+
+ /* Cached string representation of this location spec. This is
+ used, e.g., to save location specs to file. */
+ mutable std::string as_string;
+
+protected:
+
+ explicit location_spec (enum location_spec_type t)
+ : type (t)
+ {
+ }
+
+ location_spec (enum location_spec_type t, std::string &&str)
+ : type (t),
+ as_string (std::move (str))
+ {
+ }
+
+ location_spec (const location_spec &other)
+ : type (other.type),
+ as_string (other.as_string)
+ {
+ }
+
+ /* Compute the string representation of this object. This is called
+ by to_string when needed. */
+ virtual std::string compute_string () const = 0;
+};
+
+/* A "normal" linespec. */
+
+struct linespec_location_spec : public location_spec
+{
+ linespec_location_spec (const char **linespec,
+ symbol_name_match_type match_type);
+
+ ~linespec_location_spec ();
+
+ location_spec_up clone () const override;
+
+ bool empty_p () const override;
+
/* Whether the function name is fully-qualified or not. */
symbol_name_match_type match_type;
/* The linespec. */
- char *spec_string;
+ char *spec_string = nullptr;
+
+protected:
+ linespec_location_spec (const linespec_location_spec &other);
+
+ std::string compute_string () const override;
+};
+
+/* An address in the inferior. */
+struct address_location_spec : public location_spec
+{
+ address_location_spec (CORE_ADDR addr, const char *addr_string,
+ int addr_string_len);
+
+ location_spec_up clone () const override;
+
+ bool empty_p () const override;
+
+ CORE_ADDR address;
+
+protected:
+ address_location_spec (const address_location_spec &other);
+
+ std::string compute_string () const override;
};
/* An explicit location spec. This structure is used to bypass the
@@ -83,24 +172,58 @@ struct linespec_location
as linespecs, though. For example, source_filename requires
at least one other field. */
-struct explicit_location
+struct explicit_location_spec : public location_spec
{
+ explicit_location_spec ();
+
+ ~explicit_location_spec ();
+
+ location_spec_up clone () const override;
+
+ bool empty_p () const override;
+
+ /* Return a linespec string representation of this explicit location
+ spec. The explicit location spec must already be
+ canonicalized/valid. */
+ std::string to_linespec () const;
+
/* The source filename. Malloc'd. */
- char *source_filename;
+ char *source_filename = nullptr;
/* The function name. Malloc'd. */
- char *function_name;
+ char *function_name = nullptr;
/* Whether the function name is fully-qualified or not. */
- symbol_name_match_type func_name_match_type;
+ symbol_name_match_type func_name_match_type
+ = symbol_name_match_type::WILD;
/* The name of a label. Malloc'd. */
- char *label_name;
+ char *label_name = nullptr;
/* A line offset relative to the start of the symbol
identified by the above fields or the current symtab
if the other fields are NULL. */
- struct line_offset line_offset;
+ struct line_offset line_offset = {0, LINE_OFFSET_UNKNOWN};
+
+protected:
+ explicit_location_spec (const explicit_location_spec &other);
+
+ std::string compute_string () const override;
+};
+
+/* A probe. */
+struct probe_location_spec : public location_spec
+{
+ explicit probe_location_spec (std::string &&probe);
+
+ location_spec_up clone () const override;
+
+ bool empty_p () const override;
+
+protected:
+ probe_location_spec (const probe_location_spec &other) = default;
+
+ std::string compute_string () const override;
};
/* Return the type of the given location spec. */
@@ -108,13 +231,6 @@ struct explicit_location
extern enum location_spec_type
location_spec_type (const location_spec *);
-/* Return a linespec string representation of the given explicit
- location spec. The location spec must already be
- canonicalized/valid. */
-
-extern std::string explicit_location_to_linespec
- (const explicit_location *explicit_locspec);
-
/* Return a string representation of LOCSPEC.
This function may return NULL for unspecified linespecs,
e.g, LINESPEC_LOCATION_SPEC and spec_string is NULL.
@@ -124,27 +240,16 @@ extern std::string explicit_location_to_linespec
extern const char *
location_spec_to_string (location_spec *locspec);
-/* A deleter for a struct location_spec. */
-
-struct location_spec_deleter
-{
- void operator() (location_spec *locspec) const;
-};
-
-/* A unique pointer for location_spec. */
-typedef std::unique_ptr<location_spec, location_spec_deleter>
- location_spec_up;
-
/* Create a new linespec location spec. */
extern location_spec_up new_linespec_location_spec
(const char **linespec, symbol_name_match_type match_type);
-/* Return the linespec location spec of the given location_spec (which
- must be of type LINESPEC_LOCATION_SPEC). */
+/* Return the given location_spec as a linespec_location_spec.
+ LOCSPEC must be of type LINESPEC_LOCATION_SPEC. */
-extern const linespec_location *
- get_linespec_location (const location_spec *locspec);
+extern const linespec_location_spec *
+ as_linespec_location_spec (const location_spec *locspec);
/* Create a new address location spec.
ADDR is the address corresponding to this location_spec.
@@ -155,50 +260,42 @@ extern location_spec_up new_address_location_spec (CORE_ADDR addr,
const char *addr_string,
int addr_string_len);
-/* Return the address (a CORE_ADDR) of the given location_spec, which
- must be of type ADDRESS_LOCATION_SPEC. */
-
-extern CORE_ADDR
- get_address_location (const location_spec *locspec);
+/* Return the given location_spec as an address_location_spec.
+ LOCSPEC must be of type ADDRESS_LOCATION_SPEC. */
-/* Return the expression (a string) that was used to compute the
- address of the given location_spec, which must be of type
- ADDRESS_LOCATION_SPEC. */
-
-extern const char *
- get_address_string_location (const location_spec *locspec);
+const address_location_spec *
+ as_address_location_spec (const location_spec *locspec);
/* Create a new probe location. */
extern location_spec_up new_probe_location_spec (std::string &&probe);
-/* Return the probe location spec string of the given location_spec,
- which must be of type PROBE_LOCATION_SPEC. */
-
-extern const char *
- get_probe_location_spec_string (const location_spec *locspec);
-
-/* Initialize the given explicit location. */
+/* Assuming LOCSPEC is of type PROBE_LOCATION_SPEC, return LOCSPEC
+ cast to probe_location_spec. */
-extern void
- initialize_explicit_location (explicit_location *locspec);
+const probe_location_spec *
+ as_probe_location_spec (const location_spec *locspec);
-/* Create a new explicit location. If not NULL, EXPLICIT is checked for
- validity. If invalid, an exception is thrown. */
+/* Create a new explicit location with explicit FUNCTION_NAME. All
+ other fields are defaulted. */
-extern location_spec_up
- new_explicit_location_spec (const explicit_location *locspec);
-
-/* Return the explicit location spec of the given location_spec, which
- must be of type EXPLICIT_LOCATION. */
-
-extern struct explicit_location *
- get_explicit_location (location_spec *locspec);
-
-/* A const version of the above. */
-
-extern const explicit_location *
- get_explicit_location_const (const location_spec *locspec);
+static inline location_spec_up
+new_explicit_location_spec_function (const char *function_name)
+{
+ explicit_location_spec *spec
+ = new explicit_location_spec ();
+ spec->function_name
+ = (function_name != nullptr ? xstrdup (function_name) : nullptr);
+ return location_spec_up (spec);
+}
+
+/* Assuming LOCSPEC is of type EXPLICIT_LOCATION_SPEC, return LOCSPEC
+ cast to explicit_location_spec. */
+
+const explicit_location_spec *
+ as_explicit_location_spec (const location_spec *locspec);
+explicit_location_spec *
+ as_explicit_location_spec (location_spec *locspec);
/* Return a copy of the given SRC location spec. */
diff --git a/gdb/mi/mi-cmd-break.c b/gdb/mi/mi-cmd-break.c
index dab0a471abc..408f582ebc5 100644
--- a/gdb/mi/mi-cmd-break.c
+++ b/gdb/mi/mi-cmd-break.c
@@ -182,7 +182,8 @@ mi_cmd_break_insert_1 (int dprintf, const char *command, char **argv, int argc)
location_spec_up locspec;
const struct breakpoint_ops *ops;
int is_explicit = 0;
- struct explicit_location explicit_loc;
+ std::unique_ptr<explicit_location_spec> explicit_loc
+ (new explicit_location_spec ());
std::string extra_string;
bool force_condition = false;
@@ -220,8 +221,6 @@ mi_cmd_break_insert_1 (int dprintf, const char *command, char **argv, int argc)
int oind = 0;
char *oarg;
- initialize_explicit_location (&explicit_loc);
-
while (1)
{
int opt = mi_getopt ("-break-insert", argc, argv,
@@ -259,19 +258,19 @@ mi_cmd_break_insert_1 (int dprintf, const char *command, char **argv, int argc)
break;
case EXPLICIT_SOURCE_OPT:
is_explicit = 1;
- explicit_loc.source_filename = oarg;
+ explicit_loc->source_filename = xstrdup (oarg);
break;
case EXPLICIT_FUNC_OPT:
is_explicit = 1;
- explicit_loc.function_name = oarg;
+ explicit_loc->function_name = xstrdup (oarg);
break;
case EXPLICIT_LABEL_OPT:
is_explicit = 1;
- explicit_loc.label_name = oarg;
+ explicit_loc->label_name = xstrdup (oarg);
break;
case EXPLICIT_LINE_OPT:
is_explicit = 1;
- explicit_loc.line_offset = linespec_parse_line_offset (oarg);
+ explicit_loc->line_offset = linespec_parse_line_offset (oarg);
break;
case FORCE_CONDITION_OPT:
force_condition = true;
@@ -339,16 +338,16 @@ mi_cmd_break_insert_1 (int dprintf, const char *command, char **argv, int argc)
{
/* Error check -- we must have one of the other
parameters specified. */
- if (explicit_loc.source_filename != NULL
- && explicit_loc.function_name == NULL
- && explicit_loc.label_name == NULL
- && explicit_loc.line_offset.sign == LINE_OFFSET_UNKNOWN)
+ if (explicit_loc->source_filename != NULL
+ && explicit_loc->function_name == NULL
+ && explicit_loc->label_name == NULL
+ && explicit_loc->line_offset.sign == LINE_OFFSET_UNKNOWN)
error (_("-%s-insert: --source option requires --function, --label,"
" or --line"), dprintf ? "dprintf" : "break");
- explicit_loc.func_name_match_type = match_type;
+ explicit_loc->func_name_match_type = match_type;
- locspec = new_explicit_location_spec (&explicit_loc);
+ locspec = std::move (explicit_loc);
}
else
{
diff --git a/gdb/probe.c b/gdb/probe.c
index 0b056eb88db..5371b7eca46 100644
--- a/gdb/probe.c
+++ b/gdb/probe.c
@@ -123,7 +123,7 @@ parse_probes (const location_spec *locspec,
const char *arg_start, *cs;
gdb_assert (location_spec_type (locspec) == PROBE_LOCATION_SPEC);
- arg_start = get_probe_location_spec_string (locspec);
+ arg_start = locspec->to_string ();
cs = arg_start;
const static_probe_ops *spops = probe_linespec_to_static_ops (&cs);
diff --git a/gdb/python/py-breakpoint.c b/gdb/python/py-breakpoint.c
index 029ced74136..bab1c60a43e 100644
--- a/gdb/python/py-breakpoint.c
+++ b/gdb/python/py-breakpoint.c
@@ -839,20 +839,23 @@ bppy_init (PyObject *self, PyObject *args, PyObject *kwargs)
}
else
{
- struct explicit_location explicit_loc;
+ std::unique_ptr<explicit_location_spec> explicit_loc
+ (new explicit_location_spec ());
- initialize_explicit_location (&explicit_loc);
- explicit_loc.source_filename = source;
- explicit_loc.function_name = function;
- explicit_loc.label_name = label;
+ explicit_loc->source_filename
+ = source != nullptr ? xstrdup (source) : nullptr;
+ explicit_loc->function_name
+ = function != nullptr ? xstrdup (function) : nullptr;
+ explicit_loc->label_name
+ = label != nullptr ? xstrdup (label) : nullptr;
if (line != NULL)
- explicit_loc.line_offset =
- linespec_parse_line_offset (line.get ());
+ explicit_loc->line_offset
+ = linespec_parse_line_offset (line.get ());
- explicit_loc.func_name_match_type = func_name_match_type;
+ explicit_loc->func_name_match_type = func_name_match_type;
- locspec = new_explicit_location_spec (&explicit_loc);
+ locspec.reset (explicit_loc.release ());
}
const struct breakpoint_ops *ops
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2022-06-17 9:23 [binutils-gdb] Eliminate the two-level data structures behind location_specs Pedro Alves
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