[PATCH 3/9] gdb: Convert language la_read_var_value field to a method
Andrew Burgess
andrew.burgess@embecosm.com
Mon May 11 22:35:48 GMT 2020
This commit changes the language_data::la_read_var_value function
pointer member variable into a member function of language_defn.
There should be no user visible changes after this commit.
gdb/ChangeLog:
* ada-lang.c (ada_read_var_value): Delete function, move
implementation to...
(ada_language::read_var_value): ...here.
(ada_language_data): Delete la_read_var_value initializer.
* c-lang.c (c_language_data): Likewise.
(cplus_language_data): Likewise.
(minimal_language_data): Likewise.
* d-lang.c (d_language_data): Likewise.
* f-lang.c (f_language_data): Likewise.
* findvar.c (read_var_value): Update header comment, and change to
call member function instead of function pointer.
* go-lang.c (go_language_data): Likewise.
* language.c (language_defn::read_var_value): New member function.
(unknown_language_data): Delete la_read_var_value initializer.
(auto_language_data): Likewise.
* language.h (struct language_data): Delete la_read_var_value
field.
(language_defn::read_var_value): New member function.
(default_read_var_value): Delete declaration.
* m2-lang.c (m2_language_data): Delete la_read_var_value
initializer.
* objc-lang.c (objc_language_data): Likewise.
* opencl-lang.c (opencl_language_data): Likewise.
* p-lang.c (pascal_language_data): Likewise.
* rust-lang.c (rust_language_data): Likewise.
---
gdb/ChangeLog | 28 ++++++++++++++++++++++++++++
gdb/ada-lang.c | 41 ++++++++++++++++++++---------------------
gdb/c-lang.c | 4 ----
gdb/d-lang.c | 1 -
gdb/f-lang.c | 1 -
gdb/findvar.c | 5 ++---
gdb/go-lang.c | 1 -
gdb/language.c | 12 ++++++++++--
gdb/language.h | 30 +++++++++++++++---------------
gdb/m2-lang.c | 1 -
gdb/objc-lang.c | 1 -
gdb/opencl-lang.c | 1 -
gdb/p-lang.c | 1 -
gdb/rust-lang.c | 1 -
14 files changed, 75 insertions(+), 53 deletions(-)
diff --git a/gdb/ada-lang.c b/gdb/ada-lang.c
index 47007e52119..f39b4e0747c 100644
--- a/gdb/ada-lang.c
+++ b/gdb/ada-lang.c
@@ -14034,26 +14034,6 @@ ada_get_symbol_name_matcher (const lookup_name_info &lookup_name)
}
}
-/* Implement the "la_read_var_value" language_defn method for Ada. */
-
-static struct value *
-ada_read_var_value (struct symbol *var, const struct block *var_block,
- struct frame_info *frame)
-{
- /* The only case where default_read_var_value is not sufficient
- is when VAR is a renaming... */
- if (frame != nullptr)
- {
- const struct block *frame_block = get_frame_block (frame, NULL);
- if (frame_block != nullptr && ada_is_renaming_symbol (var))
- return ada_read_renaming_var_value (var, frame_block);
- }
-
- /* This is a typical case where we expect the default_read_var_value
- function to work. */
- return default_read_var_value (var, var_block, frame);
-}
-
static const char *ada_extensions[] =
{
".adb", ".ads", ".a", ".ada", ".dg", NULL
@@ -14082,7 +14062,6 @@ extern const struct language_data ada_language_data =
ada_print_typedef, /* Print a typedef using appropriate syntax */
ada_value_print_inner, /* la_value_print_inner */
ada_value_print, /* Print a top-level value */
- ada_read_var_value, /* la_read_var_value */
NULL, /* Language specific skip_trampoline */
NULL, /* name_of_this */
true, /* la_store_sym_names_in_linkage_form_p */
@@ -14128,6 +14107,26 @@ class ada_language : public language_defn
LA_VALUE_PRINT (index_value, stream, options);
fprintf_filtered (stream, " => ");
}
+
+ /* Implement the "read_var_value" language_defn method for Ada. */
+
+ struct value *read_var_value (struct symbol *var,
+ const struct block *var_block,
+ struct frame_info *frame) const override
+ {
+ /* The only case where default_read_var_value is not sufficient
+ is when VAR is a renaming... */
+ if (frame != nullptr)
+ {
+ const struct block *frame_block = get_frame_block (frame, NULL);
+ if (frame_block != nullptr && ada_is_renaming_symbol (var))
+ return ada_read_renaming_var_value (var, frame_block);
+ }
+
+ /* This is a typical case where we expect the default_read_var_value
+ function to work. */
+ return default_read_var_value (var, var_block, frame);
+ }
};
/* Single instance of the Ada language class. */
diff --git a/gdb/c-lang.c b/gdb/c-lang.c
index af4b4d3cf02..8fbbf4b44d4 100644
--- a/gdb/c-lang.c
+++ b/gdb/c-lang.c
@@ -907,7 +907,6 @@ extern const struct language_data c_language_data =
c_print_typedef, /* Print a typedef using appropriate syntax */
c_value_print_inner, /* la_value_print_inner */
c_value_print, /* Print a top-level value */
- default_read_var_value, /* la_read_var_value */
NULL, /* Language specific skip_trampoline */
NULL, /* name_of_this */
true, /* la_store_sym_names_in_linkage_form_p */
@@ -1067,7 +1066,6 @@ extern const struct language_data cplus_language_data =
c_print_typedef, /* Print a typedef using appropriate syntax */
c_value_print_inner, /* la_value_print_inner */
c_value_print, /* Print a top-level value */
- default_read_var_value, /* la_read_var_value */
cplus_skip_trampoline, /* Language specific skip_trampoline */
"this", /* name_of_this */
false, /* la_store_sym_names_in_linkage_form_p */
@@ -1136,7 +1134,6 @@ extern const struct language_data asm_language_data =
c_print_typedef, /* Print a typedef using appropriate syntax */
c_value_print_inner, /* la_value_print_inner */
c_value_print, /* Print a top-level value */
- default_read_var_value, /* la_read_var_value */
NULL, /* Language specific skip_trampoline */
NULL, /* name_of_this */
true, /* la_store_sym_names_in_linkage_form_p */
@@ -1202,7 +1199,6 @@ extern const struct language_data minimal_language_data =
c_print_typedef, /* Print a typedef using appropriate syntax */
c_value_print_inner, /* la_value_print_inner */
c_value_print, /* Print a top-level value */
- default_read_var_value, /* la_read_var_value */
NULL, /* Language specific skip_trampoline */
NULL, /* name_of_this */
true, /* la_store_sym_names_in_linkage_form_p */
diff --git a/gdb/d-lang.c b/gdb/d-lang.c
index af8143b9b13..e55d82e08be 100644
--- a/gdb/d-lang.c
+++ b/gdb/d-lang.c
@@ -228,7 +228,6 @@ extern const struct language_data d_language_data =
syntax. */
d_value_print_inner, /* la_value_print_inner */
c_value_print, /* Print a top-level value. */
- default_read_var_value, /* la_read_var_value */
NULL, /* Language specific skip_trampoline. */
"this",
false, /* la_store_sym_names_in_linkage_form_p */
diff --git a/gdb/f-lang.c b/gdb/f-lang.c
index 1b79485f61d..310eb999f45 100644
--- a/gdb/f-lang.c
+++ b/gdb/f-lang.c
@@ -650,7 +650,6 @@ extern const struct language_data f_language_data =
f_print_typedef, /* Print a typedef using appropriate syntax */
f_value_print_innner, /* la_value_print_inner */
c_value_print, /* FIXME */
- default_read_var_value, /* la_read_var_value */
NULL, /* Language specific skip_trampoline */
NULL, /* name_of_this */
false, /* la_store_sym_names_in_linkage_form_p */
diff --git a/gdb/findvar.c b/gdb/findvar.c
index ac4f5c3997d..3bed2706502 100644
--- a/gdb/findvar.c
+++ b/gdb/findvar.c
@@ -801,7 +801,7 @@ default_read_var_value (struct symbol *var, const struct block *var_block,
return v;
}
-/* Calls VAR's language la_read_var_value hook with the given arguments. */
+/* Calls VAR's language read_var_value hook with the given arguments. */
struct value *
read_var_value (struct symbol *var, const struct block *var_block,
@@ -810,9 +810,8 @@ read_var_value (struct symbol *var, const struct block *var_block,
const struct language_defn *lang = language_def (var->language ());
gdb_assert (lang != NULL);
- gdb_assert (lang->la_read_var_value != NULL);
- return lang->la_read_var_value (var, var_block, frame);
+ return lang->read_var_value (var, var_block, frame);
}
/* Install default attributes for register values. */
diff --git a/gdb/go-lang.c b/gdb/go-lang.c
index a69091bb631..cd960961400 100644
--- a/gdb/go-lang.c
+++ b/gdb/go-lang.c
@@ -599,7 +599,6 @@ extern const struct language_data go_language_data =
syntax. */
go_value_print_inner, /* la_value_print_inner */
c_value_print, /* Print a top-level value. */
- default_read_var_value, /* la_read_var_value */
NULL, /* Language specific skip_trampoline. */
NULL, /* name_of_this */
false, /* la_store_sym_names_in_linkage_form_p */
diff --git a/gdb/language.c b/gdb/language.c
index 4b2a405c725..8917099d8fe 100644
--- a/gdb/language.c
+++ b/gdb/language.c
@@ -664,6 +664,16 @@ language_defn::print_array_index (struct value *index_value,
/* See language.h. */
+struct value *
+language_defn::read_var_value (struct symbol *var,
+ const struct block *var_block,
+ struct frame_info *frame) const
+{
+ return default_read_var_value (var, var_block, frame);
+}
+
+/* See language.h. */
+
bool
default_symbol_name_matcher (const char *symbol_search_name,
const lookup_name_info &lookup_name,
@@ -831,7 +841,6 @@ extern const struct language_data unknown_language_data =
default_print_typedef, /* Print a typedef using appropriate syntax */
unk_lang_value_print_inner, /* la_value_print_inner */
unk_lang_value_print, /* Print a top-level value */
- default_read_var_value, /* la_read_var_value */
unk_lang_trampoline, /* Language specific skip_trampoline */
"this", /* name_of_this */
true, /* store_sym_names_in_linkage_form_p */
@@ -895,7 +904,6 @@ extern const struct language_data auto_language_data =
default_print_typedef, /* Print a typedef using appropriate syntax */
unk_lang_value_print_inner, /* la_value_print_inner */
unk_lang_value_print, /* Print a top-level value */
- default_read_var_value, /* la_read_var_value */
unk_lang_trampoline, /* Language specific skip_trampoline */
"this", /* name_of_this */
false, /* store_sym_names_in_linkage_form_p */
diff --git a/gdb/language.h b/gdb/language.h
index 307a08c13cd..2219bcf3869 100644
--- a/gdb/language.h
+++ b/gdb/language.h
@@ -272,21 +272,6 @@ struct language_data
void (*la_value_print) (struct value *, struct ui_file *,
const struct value_print_options *);
- /* Given a symbol VAR, the corresponding block VAR_BLOCK (if any) and a
- stack frame id FRAME, read the value of the variable and return (pointer
- to a) struct value containing the value.
-
- VAR_BLOCK is needed if there's a possibility for VAR to be outside
- FRAME. This is what happens if FRAME correspond to a nested function
- and VAR is defined in the outer function. If callers know that VAR is
- located in FRAME or is global/static, NULL can be passed as VAR_BLOCK.
-
- Throw an error if the variable cannot be found. */
-
- struct value *(*la_read_var_value) (struct symbol *var,
- const struct block *var_block,
- struct frame_info *frame);
-
/* PC is possibly an unknown languages trampoline.
If that PC falls in a trampoline belonging to this language,
return the address of the first pc in the real function, or 0
@@ -496,6 +481,21 @@ struct language_defn : language_data
struct ui_file *stream,
const value_print_options *options) const;
+ /* Given a symbol VAR, the corresponding block VAR_BLOCK (if any) and a
+ stack frame id FRAME, read the value of the variable and return (pointer
+ to a) struct value containing the value.
+
+ VAR_BLOCK is needed if there's a possibility for VAR to be outside
+ FRAME. This is what happens if FRAME correspond to a nested function
+ and VAR is defined in the outer function. If callers know that VAR is
+ located in FRAME or is global/static, NULL can be passed as VAR_BLOCK.
+
+ Throw an error if the variable cannot be found. */
+
+ virtual struct value *read_var_value (struct symbol *var,
+ const struct block *var_block,
+ struct frame_info *frame) const;
+
/* List of all known languages. */
static const struct language_defn *languages[nr_languages];
};
diff --git a/gdb/m2-lang.c b/gdb/m2-lang.c
index 4d4f5493938..a6be7c3a889 100644
--- a/gdb/m2-lang.c
+++ b/gdb/m2-lang.c
@@ -397,7 +397,6 @@ extern const struct language_data m2_language_data =
m2_print_typedef, /* Print a typedef using appropriate syntax */
m2_value_print_inner, /* la_value_print_inner */
c_value_print, /* Print a top-level value */
- default_read_var_value, /* la_read_var_value */
NULL, /* Language specific skip_trampoline */
NULL, /* name_of_this */
false, /* la_store_sym_names_in_linkage_form_p */
diff --git a/gdb/objc-lang.c b/gdb/objc-lang.c
index 47d75620dcb..2ac484c7bcd 100644
--- a/gdb/objc-lang.c
+++ b/gdb/objc-lang.c
@@ -386,7 +386,6 @@ extern const struct language_data objc_language_data =
c_print_typedef, /* Print a typedef using appropriate syntax */
c_value_print_inner, /* la_value_print_inner */
c_value_print, /* Print a top-level value */
- default_read_var_value, /* la_read_var_value */
objc_skip_trampoline, /* Language specific skip_trampoline */
"self", /* name_of_this */
false, /* la_store_sym_names_in_linkage_form_p */
diff --git a/gdb/opencl-lang.c b/gdb/opencl-lang.c
index ebd13d68381..c1dc325e29c 100644
--- a/gdb/opencl-lang.c
+++ b/gdb/opencl-lang.c
@@ -1063,7 +1063,6 @@ extern const struct language_data opencl_language_data =
c_print_typedef, /* Print a typedef using appropriate syntax */
c_value_print_inner, /* la_value_print_inner */
c_value_print, /* Print a top-level value */
- default_read_var_value, /* la_read_var_value */
NULL, /* Language specific skip_trampoline */
NULL, /* name_of_this */
false, /* la_store_sym_names_in_linkage_form_p */
diff --git a/gdb/p-lang.c b/gdb/p-lang.c
index 34063232da6..8d64c30376a 100644
--- a/gdb/p-lang.c
+++ b/gdb/p-lang.c
@@ -451,7 +451,6 @@ extern const struct language_data pascal_language_data =
pascal_print_typedef, /* Print a typedef using appropriate syntax */
pascal_value_print_inner, /* la_value_print_inner */
pascal_value_print, /* Print a top-level value */
- default_read_var_value, /* la_read_var_value */
NULL, /* Language specific skip_trampoline */
"this", /* name_of_this */
false, /* la_store_sym_names_in_linkage_form_p */
diff --git a/gdb/rust-lang.c b/gdb/rust-lang.c
index 41bb47189eb..7f3ed2bb3ec 100644
--- a/gdb/rust-lang.c
+++ b/gdb/rust-lang.c
@@ -2123,7 +2123,6 @@ extern const struct language_data rust_language_data =
rust_print_typedef, /* Print a typedef using appropriate syntax */
rust_value_print_inner, /* la_value_print_inner */
c_value_print, /* Print a top-level value */
- default_read_var_value, /* la_read_var_value */
NULL, /* Language specific skip_trampoline */
NULL, /* name_of_this */
false, /* la_store_sym_names_in_linkage_form_p */
--
2.25.3
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