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Fix breakpoint condition that use member variables.

Browse source 
* valops.c (check_field): Remove.
        (check_field_in): Rename to check_field.
        (value_of_this): Use la_name_of_this.
        * value.h (check_field): Adjust prototype.

        * language.h (la_value_of_this): Rename to la_name_of_this.
        * language.c (unknown_language_defn): Specify "this" for
        name_of_this.
        (auto_language_defn): Likewise.
        (local_language_defn): Likewise.
        * ada-lang.c (ada_language_defn): Adjust comment.
        * c-lang.c (c_language_defn): Adjust comment.
        (cplus_language_defn): Specify "this" for name_of_this.
        (asm_language_defn): Adjust comment.
        (minimal_language_defn): Adjust comment.
        * f-lang.c (f_language_defn): Specify NULL for name_of_this.
        * jv-lang.c (java_language_defn): Specify "this" for name_of_this.
        * m2-lang.c (m2_language_defn): Specify "this" for name_of_this.
        * objc-lang.c (objc_language_defn): Specify "self" for
        name_of_this.
        * p-lang.c (pascal_language_defn): Specify "this" for
        name_of_this.
        * scm-lang.c (scm_language_defn): Specify NULL for name_of_this.

        * symtab.c (lookup_symbol_aux): Lookup "this" in the
        proper scope, and check for field in type of "this", without
        trying to create a value.
This commit is contained in:
Vladimir Prus 2008-04-06 08:56:37 +00:00
parent 2344873715
commit 2b2d9e11a0
17 changed files with 133 additions and 73 deletions
Download patch file Download diff file Expand all files Collapse all files

31
gdb/ChangeLog
View file

@ -1,3 +1,34 @@
2008-04-06 Vladimir Prus <vladimir@codesourcery.com>
Fix breakpoint condition that use member variables.
* valops.c (check_field): Remove.
(check_field_in): Rename to check_field.
(value_of_this): Use la_name_of_this.
* value.h (check_field): Adjust prototype.
* language.h (la_value_of_this): Rename to la_name_of_this.
* language.c (unknown_language_defn): Specify "this" for
name_of_this.
(auto_language_defn): Likewise.
(local_language_defn): Likewise.
* ada-lang.c (ada_language_defn): Adjust comment.
* c-lang.c (c_language_defn): Adjust comment.
(cplus_language_defn): Specify "this" for name_of_this.
(asm_language_defn): Adjust comment.
(minimal_language_defn): Adjust comment.
* f-lang.c (f_language_defn): Specify NULL for name_of_this.
* jv-lang.c (java_language_defn): Specify "this" for name_of_this.
* m2-lang.c (m2_language_defn): Specify "this" for name_of_this.
* objc-lang.c (objc_language_defn): Specify "self" for
name_of_this.
* p-lang.c (pascal_language_defn): Specify "this" for
name_of_this.
* scm-lang.c (scm_language_defn): Specify NULL for name_of_this.
* symtab.c (lookup_symbol_aux): Lookup "this" in the
proper scope, and check for field in type of "this", without
trying to create a value.
2008-04-04 Pedro Alves <pedro@codesourcery.com>
* mi/mi-cmds.h (enum mi_cmd_result): Delete MI_CMD_ERROR.

2
gdb/ada-lang.c
View file

@ -11011,7 +11011,7 @@ const struct language_defn ada_language_defn = {
ada_val_print, /* Print a value using appropriate syntax */
ada_value_print, /* Print a top-level value */
NULL, /* Language specific skip_trampoline */
NULL, /* value_of_this */
NULL, /* name_of_this */
ada_lookup_symbol_nonlocal, /* Looking up non-local symbols. */
basic_lookup_transparent_type, /* lookup_transparent_type */
ada_la_decode, /* Language specific symbol demangler */

8
gdb/c-lang.c
View file

@ -414,7 +414,7 @@ const struct language_defn c_language_defn =
c_val_print, /* Print a value using appropriate syntax */
c_value_print, /* Print a top-level value */
NULL, /* Language specific skip_trampoline */
NULL, /* value_of_this */
NULL, /* name_of_this */
basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
basic_lookup_transparent_type,/* lookup_transparent_type */
NULL, /* Language specific symbol demangler */
@ -527,7 +527,7 @@ const struct language_defn cplus_language_defn =
c_val_print, /* Print a value using appropriate syntax */
c_value_print, /* Print a top-level value */
cplus_skip_trampoline, /* Language specific skip_trampoline */
value_of_this, /* value_of_this */
"this", /* name_of_this */
cp_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
cp_lookup_transparent_type, /* lookup_transparent_type */
cplus_demangle, /* Language specific symbol demangler */
@ -562,7 +562,7 @@ const struct language_defn asm_language_defn =
c_val_print, /* Print a value using appropriate syntax */
c_value_print, /* Print a top-level value */
NULL, /* Language specific skip_trampoline */
NULL, /* value_of_this */
NULL, /* name_of_this */
basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
basic_lookup_transparent_type,/* lookup_transparent_type */
NULL, /* Language specific symbol demangler */
@ -602,7 +602,7 @@ const struct language_defn minimal_language_defn =
c_val_print, /* Print a value using appropriate syntax */
c_value_print, /* Print a top-level value */
NULL, /* Language specific skip_trampoline */
NULL, /* value_of_this */
NULL, /* name_of_this */
basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
basic_lookup_transparent_type,/* lookup_transparent_type */
NULL, /* Language specific symbol demangler */

2
gdb/f-lang.c
View file

@ -324,7 +324,7 @@ const struct language_defn f_language_defn =
f_val_print, /* Print a value using appropriate syntax */
c_value_print, /* FIXME */
NULL, /* Language specific skip_trampoline */
value_of_this, /* value_of_this */
NULL, /* name_of_this */
basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
basic_lookup_transparent_type,/* lookup_transparent_type */
NULL, /* Language specific symbol demangler */

2
gdb/jv-lang.c
View file

@ -1070,7 +1070,7 @@ const struct language_defn java_language_defn =
java_val_print, /* Print a value using appropriate syntax */
java_value_print, /* Print a top-level value */
NULL, /* Language specific skip_trampoline */
value_of_this, /* value_of_this */
"this", /* name_of_this */
basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
basic_lookup_transparent_type,/* lookup_transparent_type */
java_demangle, /* Language specific symbol demangler */

6
gdb/language.c
View file

@ -1192,7 +1192,7 @@ const struct language_defn unknown_language_defn =
unk_lang_val_print, /* Print a value using appropriate syntax */
unk_lang_value_print, /* Print a top-level value */
unk_lang_trampoline, /* Language specific skip_trampoline */
value_of_this, /* value_of_this */
"this", /* name_of_this */
basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
basic_lookup_transparent_type,/* lookup_transparent_type */
unk_lang_demangle, /* Language specific symbol demangler */
@ -1228,7 +1228,7 @@ const struct language_defn auto_language_defn =
unk_lang_val_print, /* Print a value using appropriate syntax */
unk_lang_value_print, /* Print a top-level value */
unk_lang_trampoline, /* Language specific skip_trampoline */
value_of_this, /* value_of_this */
"this", /* name_of_this */
basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
basic_lookup_transparent_type,/* lookup_transparent_type */
unk_lang_demangle, /* Language specific symbol demangler */
@ -1263,7 +1263,7 @@ const struct language_defn local_language_defn =
unk_lang_val_print, /* Print a value using appropriate syntax */
unk_lang_value_print, /* Print a top-level value */
unk_lang_trampoline, /* Language specific skip_trampoline */
value_of_this, /* value_of_this */
"this", /* name_of_this */
basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
basic_lookup_transparent_type,/* lookup_transparent_type */
unk_lang_demangle, /* Language specific symbol demangler */

10
gdb/language.h
View file

@ -206,14 +206,10 @@ struct language_defn
/* Now come some hooks for lookup_symbol. */
/* If this is non-NULL, lookup_symbol will do the 'field_of_this'
check, using this function to find the value of this. */
/* If this is non-NULL, specifies the name that of the implicit
local variable that refers to the current object instance. */
/* FIXME: carlton/2003-05-19: Audit all the language_defn structs
to make sure we're setting this appropriately: I'm sure it
could be NULL in more languages. */
struct value *(*la_value_of_this) (int complain);
char *la_name_of_this;
/* This is a function that lookup_symbol will call when it gets to
the part of symbol lookup where C looks up static and global

2
gdb/m2-lang.c
View file

@ -375,7 +375,7 @@ const struct language_defn m2_language_defn =
m2_val_print, /* Print a value using appropriate syntax */
c_value_print, /* Print a top-level value */
NULL, /* Language specific skip_trampoline */
value_of_this, /* value_of_this */
NULL, /* name_of_this */
basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
basic_lookup_transparent_type,/* lookup_transparent_type */
NULL, /* Language specific symbol demangler */

2
gdb/objc-lang.c
View file

@ -509,7 +509,7 @@ const struct language_defn objc_language_defn = {
c_val_print, /* Print a value using appropriate syntax */
c_value_print, /* Print a top-level value */
objc_skip_trampoline, /* Language specific skip_trampoline */
value_of_this, /* value_of_this */
"self", /* name_of_this */
basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
basic_lookup_transparent_type,/* lookup_transparent_type */
objc_demangle, /* Language specific symbol demangler */

2
gdb/p-lang.c
View file

@ -414,7 +414,7 @@ const struct language_defn pascal_language_defn =
pascal_val_print, /* Print a value using appropriate syntax */
pascal_value_print, /* Print a top-level value */
NULL, /* Language specific skip_trampoline */
value_of_this, /* value_of_this */
"this", /* name_of_this */
basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
basic_lookup_transparent_type,/* lookup_transparent_type */
NULL, /* Language specific symbol demangler */

2
gdb/scm-lang.c
View file

@ -253,7 +253,7 @@ const struct language_defn scm_language_defn =
scm_val_print, /* Print a value using appropriate syntax */
scm_value_print, /* Print a top-level value */
NULL, /* Language specific skip_trampoline */
value_of_this, /* value_of_this */
NULL, /* name_of_this */
basic_lookup_symbol_nonlocal, /* lookup_symbol_nonlocal */
basic_lookup_transparent_type,/* lookup_transparent_type */
NULL, /* Language specific symbol demangler */

40
gdb/symtab.c
View file

@ -1222,17 +1222,41 @@ lookup_symbol_aux (const char *name, const char *linkage_name,
langdef = language_def (language);
if (langdef->la_value_of_this != NULL
&& is_a_field_of_this != NULL)
if (langdef->la_name_of_this != NULL && is_a_field_of_this != NULL
&& block != NULL)
{
struct value *v = langdef->la_value_of_this (0);
struct symbol *sym = NULL;
/* 'this' is only defined in the function's block, so find the
enclosing function block. */
for (; block && !BLOCK_FUNCTION (block);
block = BLOCK_SUPERBLOCK (block));
if (v && check_field (v, name))
if (block && !dict_empty (BLOCK_DICT (block)))
sym = lookup_block_symbol (block, langdef->la_name_of_this,
NULL, VAR_DOMAIN);
if (sym)
{
*is_a_field_of_this = 1;
if (symtab != NULL)
*symtab = NULL;
return NULL;
struct type *t = sym->type;
/* I'm not really sure that type of this can ever
be typedefed; just be safe. */
CHECK_TYPEDEF (t);
if (TYPE_CODE (t) == TYPE_CODE_PTR
|| TYPE_CODE (t) == TYPE_CODE_REF)
t = TYPE_TARGET_TYPE (t);
if (TYPE_CODE (t) != TYPE_CODE_STRUCT
&& TYPE_CODE (t) != TYPE_CODE_UNION)
error (_("Internal error: `%s' is not an aggregate"),
langdef->la_name_of_this);
if (check_field (t, name))
{
*is_a_field_of_this = 1;
if (symtab != NULL)
*symtab = NULL;
return NULL;
}
}
}

7
gdb/testsuite/ChangeLog
View file

@ -1,3 +1,10 @@
2008-04-06 Vladimir Prus <vladimir@codesourcery.com>
* gdb.cp/breakpoint.cc: New code to test conditions involving
member variables.
* gdb.cp/breakpoint.exp: Test condition involving member
variables.
2008-04-05 Vladimir Prus <vladimir@codesourcery.com>
* lib/mi-support.exp (mi_expect_stop): New.

29
gdb/testsuite/gdb.cp/breakpoint.cc
View file

@ -17,8 +17,26 @@
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
int g = 0;
class C1 {
public:
C1(int i) : i_(i) {}
int foo ()
{
return 1; // conditional breakpoint in method
}
int bar ()
{
for (int i = 0; i < 1; ++i)
{
int t = i * 2;
g += t; // conditional breakpoint in method 2
}
}
class Nested {
public:
int
@ -27,13 +45,22 @@ public:
return 1;
}
};
private:
int i_;
};
int main ()
{
C1::Nested c1;
c1.foo();
c1.foo ();
C1 c2 (2), c3 (3);
c2.foo ();
c2.bar ();
c3.foo ();
c3.bar ();
return 0;
}

10
gdb/testsuite/gdb.cp/breakpoint.exp
View file

@ -61,5 +61,15 @@ proc test_breakpoint {name} {
test_breakpoint "C1::Nested::foo"
set bp_location1 [gdb_get_line_number "conditional breakpoint in method"]
set bp_location2 [gdb_get_line_number "conditional breakpoint in method 2"]
gdb_test "break $bp_location1 if i_==3" ".*Breakpoint.*" "conditional breakpoint in method"
gdb_test "break $bp_location2 if i_==3" ".*Breakpoint.*" "conditional breakpoint in method 2"
gdb_test "continue" ".*Breakpoint.*C1::foo.*" "continue to breakpoint"
gdb_test "print i_" "\\\$1 = 3" "check the member variable"
gdb_test "continue" ".*Breakpoint.*C1::bar.*" "continue to breakpoint"
gdb_test "print i_" "\\\$2 = 3" "check the member variable"
gdb_exit
return 0

49
gdb/valops.c
View file

@ -80,8 +80,6 @@ static enum
oload_classification classify_oload_match (struct badness_vector *,
int, int);
static int check_field_in (struct type *, const char *);
static struct value *value_struct_elt_for_reference (struct type *,
int, struct type *,
char *,
@ -2338,12 +2336,12 @@ destructor_name_p (const char *name, const struct type *type)
return 0;
}
/* Helper function for check_field: Given TYPE, a structure/union,
/* Given TYPE, a structure/union,
return 1 if the component named NAME from the ultimate target
structure/union is defined, otherwise, return 0. */
static int
check_field_in (struct type *type, const char *name)
int
check_field (struct type *type, const char *name)
{
int i;
@ -2372,44 +2370,12 @@ check_field_in (struct type *type, const char *name)
}
for (i = TYPE_N_BASECLASSES (type) - 1; i >= 0; i--)
if (check_field_in (TYPE_BASECLASS (type, i), name))
if (check_field (TYPE_BASECLASS (type, i), name))
return 1;
return 0;
}
/* C++: Given ARG1, a value of type (pointer to a)* structure/union,
return 1 if the component named NAME from the ultimate target
structure/union is defined, otherwise, return 0. */
int
check_field (struct value *arg1, const char *name)
{
struct type *t;
arg1 = coerce_array (arg1);
t = value_type (arg1);
/* Follow pointers until we get to a non-pointer. */
for (;;)
{
CHECK_TYPEDEF (t);
if (TYPE_CODE (t) != TYPE_CODE_PTR
&& TYPE_CODE (t) != TYPE_CODE_REF)
break;
t = TYPE_TARGET_TYPE (t);
}
if (TYPE_CODE (t) != TYPE_CODE_STRUCT
&& TYPE_CODE (t) != TYPE_CODE_UNION)
error (_("Internal error: `this' is not an aggregate"));
return check_field_in (t, name);
}
/* C++: Given an aggregate type CURTYPE, and a member name NAME,
return the appropriate member (or the address of the member, if
WANT_ADDRESS). This function is used to resolve user expressions
@ -2815,10 +2781,9 @@ value_of_local (const char *name, int complain)
struct value *
value_of_this (int complain)
{
if (current_language->la_language == language_objc)
return value_of_local ("self", complain);
else
return value_of_local ("this", complain);
if (!current_language->la_name_of_this)
return 0;
return value_of_local (current_language->la_name_of_this, complain);
}
/* Create a slice (sub-string, sub-array) of ARRAY, that is LENGTH

2
gdb/value.h
View file

@ -530,7 +530,7 @@ extern void print_variable_value (struct symbol *var,
struct frame_info *frame,
struct ui_file *stream);
extern int check_field (struct value *, const char *);
extern int check_field (struct type *, const char *);
extern void typedef_print (struct type *type, struct symbol *news,
struct ui_file *stream);