[PATCH v2] ctf-reader: Add support to undefined forward declaration types
Guillermo E. Martinez
guillermo.e.martinez@oracle.com
Fri Mar 18 01:30:36 GMT 2022
This is the patch v2 intended to fix undefined forward declarations
in ctf reader back-end.
Changes from v1 is update tests/data/Makefile.am to include test
input/expected files.
Comments will be appreciated.
Kind Regards,
Guillermo
Undefined struct/union forward declaration types are not serialized in
abixml representation using `class-decl' node.
For instance, consider:
struct key_type;
typedef void (*key_restrict_link_func_t)(struct key_type *type);
Expected node:
<class-decl name='key_type' ... is-declaration-only='yes'.../>
* src/abg-ctf-reader.cc (process_ctf_forward_type): New
function.
(process_ctf_type): New CTF_K_FORWARD case.
* tests/data/test-read-ctf/test-forward-undefine-type-decl.c:
New testcase.
* tests/data/test-read-ctf/test-forward-undefine-type-decl.abi:
New expected result.
* tests/data/test-read-ctf/test-forward-undefine-type-decl.o
New test input.
* tests/test-read-ctf.cc: Add new testcase to test harness.
* tests/data/Makefile.am: Add new test input files to test harness.
Signed-off-by: Guillermo E. Martinez <guillermo.e.martinez@oracle.com>
---
src/abg-ctf-reader.cc | 53 ++++++++++++++++++
tests/data/Makefile.am | 3 +
.../test-forward-undefine-type-decl.abi | 31 ++++++++++
.../test-forward-undefine-type-decl.c | 17 ++++++
.../test-forward-undefine-type-decl.o | Bin 0 -> 1488 bytes
tests/test-read-ctf.cc | 8 +++
6 files changed, 112 insertions(+)
create mode 100644 tests/data/test-read-ctf/test-forward-undefine-type-decl.abi
create mode 100644 tests/data/test-read-ctf/test-forward-undefine-type-decl.c
create mode 100644 tests/data/test-read-ctf/test-forward-undefine-type-decl.o
diff --git a/src/abg-ctf-reader.cc b/src/abg-ctf-reader.cc
index e5ea0ca2..ec6a5c81 100644
--- a/src/abg-ctf-reader.cc
+++ b/src/abg-ctf-reader.cc
@@ -384,6 +384,53 @@ process_ctf_sou_members(read_context *ctxt,
fprintf(stderr, "ERROR from ctf_member_next\n");
}
+static type_base_sptr
+process_ctf_forward_type(read_context *ctxt,
+ corpus_sptr corp,
+ translation_unit_sptr tunit,
+ ctf_dict_t *ctf_dictionary,
+ ctf_id_t ctf_type)
+{
+ decl_base_sptr result;
+ std::string type_name = ctf_type_name_raw(ctf_dictionary,
+ ctf_type);
+ bool type_is_anonymous = (type_name == "");
+ uint32_t kind = ctf_type_kind_forwarded (ctf_dictionary, ctf_type);
+
+ if (kind == CTF_K_UNION)
+ {
+ union_decl_sptr
+ union_fwd(new union_decl(ctxt->ir_env,
+ type_name,
+ /*alignment=*/0,
+ location(),
+ decl_base::VISIBILITY_DEFAULT,
+ type_is_anonymous));
+ union_fwd->set_is_declaration_only(true);
+ result = union_fwd;
+ }
+ else
+ {
+ class_decl_sptr
+ struct_fwd(new class_decl(ctxt->ir_env, type_name,
+ /*alignment=*/0, /*size=*/0,
+ true /* is_struct */,
+ location(),
+ decl_base::VISIBILITY_DEFAULT,
+ type_is_anonymous));
+ struct_fwd->set_is_declaration_only(true);
+ result = struct_fwd;
+ }
+
+ if (!result)
+ return is_type(result);
+
+ add_decl_to_scope(result, tunit->get_global_scope());
+ ctxt->add_type(ctf_type, is_type(result));
+
+ return is_type(result);
+}
+
/// Build and return a struct type libabigail IR.
///
/// @param ctxt the read context.
@@ -813,6 +860,12 @@ process_ctf_type(read_context *ctxt,
result = is_type(struct_decl);
break;
}
+ case CTF_K_FORWARD:
+ {
+ result = process_ctf_forward_type(ctxt, corp, tunit, ctf_dictionary,
+ ctf_type);
+ }
+ break;
case CTF_K_UNION:
{
union_decl_sptr union_decl
diff --git a/tests/data/Makefile.am b/tests/data/Makefile.am
index a7eb7ff0..8f71fcbf 100644
--- a/tests/data/Makefile.am
+++ b/tests/data/Makefile.am
@@ -660,6 +660,9 @@ test-read-ctf/test-functions-declaration.o \
test-read-ctf/test-forward-type-decl.abi \
test-read-ctf/test-forward-type-decl.o \
test-read-ctf/test-forward-type-decl.c \
+test-read-ctf/test-forward-undefine-type-decl.abi \
+test-read-ctf/test-forward-undefine-type-decl.c \
+test-read-ctf/test-forward-undefine-type-decl.o \
test-read-ctf/test-list-struct.c \
test-read-ctf/test-list-struct.o \
test-read-ctf/test-list-struct.abi \
diff --git a/tests/data/test-read-ctf/test-forward-undefine-type-decl.abi b/tests/data/test-read-ctf/test-forward-undefine-type-decl.abi
new file mode 100644
index 00000000..ff019208
--- /dev/null
+++ b/tests/data/test-read-ctf/test-forward-undefine-type-decl.abi
@@ -0,0 +1,31 @@
+<abi-corpus version='2.1' path='data/test-read-ctf/test-forward-undefine-type-decl.o'>
+ <elf-variable-symbols>
+ <elf-symbol name='k' size='24' type='object-type' binding='global-binding' visibility='default-visibility' is-defined='yes'/>
+ </elf-variable-symbols>
+ <abi-instr address-size='64' language='LANG_C'>
+ <class-decl name='key_restriction' size-in-bits='192' alignment-in-bits='64' is-struct='yes' visibility='default' id='type-id-1'>
+ <data-member access='public' layout-offset-in-bits='0'>
+ <var-decl name='check' type-id='type-id-2' visibility='default'/>
+ </data-member>
+ <data-member access='public' layout-offset-in-bits='64'>
+ <var-decl name='keytype' type-id='type-id-3' visibility='default'/>
+ </data-member>
+ <data-member access='public' layout-offset-in-bits='128'>
+ <var-decl name='keyutype' type-id='type-id-4' visibility='default'/>
+ </data-member>
+ </class-decl>
+ <typedef-decl name='key_restrict_link_func_t' type-id='type-id-5' id='type-id-2'/>
+ <pointer-type-def type-id='type-id-6' size-in-bits='64' alignment-in-bits='64' id='type-id-3'/>
+ <pointer-type-def type-id='type-id-7' size-in-bits='64' alignment-in-bits='64' id='type-id-4'/>
+ <pointer-type-def type-id='type-id-8' size-in-bits='64' alignment-in-bits='64' id='type-id-5'/>
+ <class-decl name='key_type' is-struct='yes' visibility='default' is-declaration-only='yes' id='type-id-6'/>
+ <var-decl name='k' type-id='type-id-1' mangled-name='k' visibility='default'/>
+ <function-type size-in-bits='64' alignment-in-bits='8' id='type-id-8'>
+ <parameter type-id='type-id-3'/>
+ <parameter type-id='type-id-4'/>
+ <return type-id='type-id-9'/>
+ </function-type>
+ <union-decl name='key_utype' visibility='default' is-declaration-only='yes' id='type-id-7'/>
+ <type-decl name='void' id='type-id-9'/>
+ </abi-instr>
+</abi-corpus>
diff --git a/tests/data/test-read-ctf/test-forward-undefine-type-decl.c b/tests/data/test-read-ctf/test-forward-undefine-type-decl.c
new file mode 100644
index 00000000..b6ab4896
--- /dev/null
+++ b/tests/data/test-read-ctf/test-forward-undefine-type-decl.c
@@ -0,0 +1,17 @@
+/* Test undefined forward declarations
+ * gcc -gctf -c test-forward-undefine-type-decl.c -o \
+ * test-forward-undefine-type-decl.o
+ */
+
+struct key_type;
+union key_utype;
+typedef void (*key_restrict_link_func_t)(struct key_type *type,
+ union key_utype *utype);
+
+struct key_restriction {
+ key_restrict_link_func_t check;
+ struct key_type *keytype;
+ union key_utype *keyutype;
+};
+
+struct key_restriction k;
diff --git a/tests/data/test-read-ctf/test-forward-undefine-type-decl.o b/tests/data/test-read-ctf/test-forward-undefine-type-decl.o
new file mode 100644
index 0000000000000000000000000000000000000000..e8adc1441c5142cd085cf4cc18356bb521ec137c
GIT binary patch
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literal 0
HcmV?d00001
diff --git a/tests/test-read-ctf.cc b/tests/test-read-ctf.cc
index e7a87186..8ed8ac1a 100644
--- a/tests/test-read-ctf.cc
+++ b/tests/test-read-ctf.cc
@@ -268,6 +268,14 @@ static InOutSpec in_out_specs[] =
"data/test-read-ctf/test-callback2.abi",
"output/test-read-ctf/test-callback2.abi",
},
+ {
+ "data/test-read-ctf/test-forward-undefine-type-decl.o",
+ "",
+ "",
+ SEQUENCE_TYPE_ID_STYLE,
+ "data/test-read-ctf/test-forward-undefine-type-decl.abi",
+ "output/test-read-ctf/test-forward-undefine-type-decl.abi",
+ },
// This should be the last entry.
{NULL, NULL, NULL, SEQUENCE_TYPE_ID_STYLE, NULL, NULL}
};
--
2.35.1
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