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gdb: Remove LANG_MAGIC

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The language_defn structure has an la_magic field, this used to be
used as a basic check that the language_defn structure had the
expected layout - at least the end of the structure was where we
expected it to be.

This feature only really makes sense if we imagine GDB dynamically
loading language support from dynamic libraries, where a version
mismatch might cause problems.

However, in current GDB language support is statically built into GDB,
and since this commit:

    commit 47e77640be
    Date:   Thu Jul 20 18:28:01 2017 +0100

        Make language_def O(1)

the existing (if pointless) check of the la_magic field was removed.

There now appears to be no use of the la_magic field, and I propose
that we delete it.

There should be no user visible changes after this commit.

gdb/ChangeLog:

	* ada-lang.c (ada_language_defn): Remove use of LANG_MAGIC.
	* c-lang.c (c_language_defn): Likewise.
	(cplus_language_defn): Likewise.
	(asm_language_defn): Likewise.
	(minimal_language_defn): Likewise.
	* d-lang.c (d_language_defn): Likewise.
	* f-lang.c (f_language_defn): Likewise.
	* go-lang.c (go_language_defn): Likewise.
	* language.c (unknown_language_defn): Likewise.
	(auto_language_defn): Likewise.
	* language.h (struct language_defn): Remove la_magic field.
	(LANG_MAGIC): Delete.
	* m2-lang.c (m2_language_defn): Remove use of LANG_MAGIC.
	* objc-lang.c (objc_language_defn): Likewise.
	* opencl-lang.c (opencl_language_defn): Likewise.
	* p-lang.c (pascal_language_defn): Likewise.
	* rust-lang.c (rust_language_defn): Likewise.
This commit is contained in:
Andrew Burgess 2019-04-11 23:51:48 +01:00
parent 3822612df0
commit 62253a6147
13 changed files with 35 additions and 38 deletions
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12
gdb/c-lang.c
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@ -873,8 +873,7 @@ extern const struct language_defn c_language_defn =
default_search_name_hash,
&c_varobj_ops,
c_get_compile_context,
c_compute_program,
LANG_MAGIC
c_compute_program
};
enum cplus_primitive_types {
@ -1018,8 +1017,7 @@ extern const struct language_defn cplus_language_defn =
cp_search_name_hash,
&cplus_varobj_ops,
cplus_get_compile_context,
cplus_compute_program,
LANG_MAGIC
cplus_compute_program
};
static const char *asm_extensions[] =
@ -1072,8 +1070,7 @@ extern const struct language_defn asm_language_defn =
default_search_name_hash,
&default_varobj_ops,
NULL,
NULL,
LANG_MAGIC
NULL
};
/* The following language_defn does not represent a real language.
@ -1126,6 +1123,5 @@ extern const struct language_defn minimal_language_defn =
default_search_name_hash,
&default_varobj_ops,
NULL,
NULL,
LANG_MAGIC
NULL
};