[PATCH 0/5] CTF: bug fixes and new features.

[PATCH 0/5] CTF: bug fixes and new features.

[Weimin Pan]

    This patch series contains bug fixes and new features for the CTF 
    (Compact Ansi-C Type Format) support in gdb.
    Two submissions on which this gdb work depends were posted earlier:

     * On the gcc mailing list - Support for the CTF debug format:
       https://gcc.gnu.org/pipermail/gcc-patches/2021-January/564092.html
     * On the binutils mailing list - adding libctf which creates, updates,
       reads, and manipulates the CTF data.

    For more information, please refer to the CTF specification:
    http://www.esperi.org.uk/~oranix/ctf/ctf-spec.pdf

Weimin Pan (5):
  CTF: fix incorrect function return type
  CTF: set up debug info for function arguments
  CTF: handle forward reference type
  CTF: add all members of an enum type to psymtab
  CTF: multi-CU and archive support

 gdb/ChangeLog                                  |  20 +
 gdb/ctfread.c                                  | 504 +++++++++++++++++--------
 gdb/testsuite/ChangeLog                        |  14 +
 gdb/testsuite/gdb.base/cross-tu-cyclic-1.c     |  18 +
 gdb/testsuite/gdb.base/cross-tu-cyclic-2.c     |  16 +
 gdb/testsuite/gdb.base/cross-tu-cyclic-3.c     |   3 +
 gdb/testsuite/gdb.base/cross-tu-cyclic-4.c     |   4 +
 gdb/testsuite/gdb.base/ctf-a.c                 |  32 ++
 gdb/testsuite/gdb.base/ctf-a.h                 |  22 ++
 gdb/testsuite/gdb.base/ctf-b.c                 |  25 ++
 gdb/testsuite/gdb.base/ctf-b.h                 |  22 ++
 gdb/testsuite/gdb.base/ctf-c.c                 |  25 ++
 gdb/testsuite/gdb.base/ctf-c.h                 |  21 ++
 gdb/testsuite/gdb.base/ctf-cross-tu-cyclic.exp |  43 +++
 gdb/testsuite/gdb.base/ctf-funcreturn.exp      | 190 ++++++++++
 gdb/testsuite/gdb.base/ctf-multi.exp           |  42 +++
 gdb/testsuite/gdb.base/ctf-ptype.c             |  12 +
 gdb/testsuite/gdb.base/ctf-ptype.exp           |  21 +-
 18 files changed, 882 insertions(+), 152 deletions(-)
 create mode 100644 gdb/testsuite/gdb.base/cross-tu-cyclic-1.c
 create mode 100644 gdb/testsuite/gdb.base/cross-tu-cyclic-2.c
 create mode 100644 gdb/testsuite/gdb.base/cross-tu-cyclic-3.c
 create mode 100644 gdb/testsuite/gdb.base/cross-tu-cyclic-4.c
 create mode 100644 gdb/testsuite/gdb.base/ctf-a.c
 create mode 100644 gdb/testsuite/gdb.base/ctf-a.h
 create mode 100644 gdb/testsuite/gdb.base/ctf-b.c
 create mode 100644 gdb/testsuite/gdb.base/ctf-b.h
 create mode 100644 gdb/testsuite/gdb.base/ctf-c.c
 create mode 100644 gdb/testsuite/gdb.base/ctf-c.h
 create mode 100644 gdb/testsuite/gdb.base/ctf-cross-tu-cyclic.exp
 create mode 100644 gdb/testsuite/gdb.base/ctf-funcreturn.exp
 create mode 100644 gdb/testsuite/gdb.base/ctf-multi.exp

-- 
1.8.3.1

[PATCH 1/5] CTF: fix incorrect function return type

[Weimin Pan]

The problems can be illustrated, with any program, below:

(gdb) print main
$1 = {main} 0x0

The return type was incorrectly set in read_func_kind_type, with
the name of the function, which leads c_type_print_base_1 to print
it. In addition, the address of a new function needs to be set with
that info in its minimal symtab entry, when the new function is added.

After the fix:

(gdb) print main
$1 = {int ()} 0x4004b7 <main>

A new test, gdb.base/ctf-funcreturn.exp, is added to the testsuite.

---
 gdb/ctfread.c                             |   5 +-
 gdb/testsuite/gdb.base/ctf-funcreturn.exp | 190 ++++++++++++++++++++++++++++++
 2 files changed, 191 insertions(+), 4 deletions(-)
 create mode 100644 gdb/testsuite/gdb.base/ctf-funcreturn.exp

diff --git a/gdb/ctfread.c b/gdb/ctfread.c
index 866977a..5a68d9c 100644
--- a/gdb/ctfread.c
+++ b/gdb/ctfread.c
@@ -462,6 +462,7 @@ struct ctf_tid_and_type
 	    break;
 	  case CTF_K_FUNCTION:
 	    SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC;
+	    set_symbol_address (objfile, sym, sym->linkage_name ());
 	    break;
 	  case CTF_K_CONST:
 	    if (SYMBOL_TYPE (sym)->code () == TYPE_CODE_VOID)
@@ -656,10 +657,6 @@ struct ctf_tid_and_type
 
   type = alloc_type (of);
 
-  gdb::unique_xmalloc_ptr<char> name (ctf_type_aname_raw (fp, tid));
-  if (name != NULL && strlen (name.get ()) != 0)
-    type->set_name (obstack_strdup (&of->objfile_obstack, name.get ()));
-
   type->set_code (TYPE_CODE_FUNC);
   ctf_func_type_info (fp, tid, &cfi);
   rettype = get_tid_type (of, cfi.ctc_return);
diff --git a/gdb/testsuite/gdb.base/ctf-funcreturn.exp b/gdb/testsuite/gdb.base/ctf-funcreturn.exp
new file mode 100644
index 0000000..874160e
--- /dev/null
+++ b/gdb/testsuite/gdb.base/ctf-funcreturn.exp
@@ -0,0 +1,190 @@
+# Copyright 2021 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+if [skip_ctf_tests] {
+    unsupported "no CTF debug format support, or CTF disabled in GDB"
+    return 0
+}
+
+if [target_info exists no_long_long] {
+    set exec_opts [list debug additional_flags=-DNO_LONG_LONG]
+} else {
+    set exec_opts [list debug]
+}
+
+standard_testfile whatis.c
+
+# Using `-gt` generates full-fledged CTF debug information.
+set opts "additional_flags=-gt -Wl,--export-dynamic"
+
+if { [prepare_for_testing "failed to prepare" ${testfile} \
+	  [list $srcfile] [list $opts nowarnings]] } {
+    return 0
+}
+
+# Create and source the file that provides information about the compiler
+# used to compile the test case.
+if [get_compiler_info] {
+    return -1
+}
+
+# test print command with functions return type
+set void "(void|)"
+gdb_test "print v_char_func" \
+    "$decimal = \{char \\(\\)\} 0x\[0-9a-z\]+ <v_char_func>.*" \
+    "print char function"
+
+gdb_test "print v_signed_char_func" \
+    "$decimal = \{signed char \\(\\)\} 0x\[0-9a-z\]+ <v_signed_char_func>.*" \
+    "print signed char function"
+
+gdb_test "print v_unsigned_char_func" \
+    "$decimal = \{unsigned char \\(\\)\} 0x\[0-9a-z\]+ <v_unsigned_char_func>.*" \
+    "print unsigned char function"
+
+gdb_test "print v_short_func" \
+    "$decimal = \{short \\(\\)\} 0x\[0-9a-z\]+ <v_short_func>.*" \
+    "print short function"
+
+gdb_test "print v_signed_short_func" \
+    "$decimal = \{signed short|short \\(\\)\} 0x\[0-9a-z\]+ <v_signed_short_func>.*" \
+    "print signed short function"
+
+gdb_test "print v_unsigned_short_func" \
+    "$decimal = \{unsigned short \\(\\)\} 0x\[0-9a-z\]+ <v_unsigned_short_func>.*" \
+    "print unsigned short function"
+
+gdb_test "print v_int_func" \
+    "$decimal = \{int \\(\\)\} 0x\[0-9a-z\]+ <v_int_func>.*" \
+    "print int function"
+
+gdb_test "print v_signed_int_func" \
+    "$decimal = \{signed int|int \\(\\)\} 0x\[0-9a-z\]+ <v_signed_int_func>.*" \
+    "print signed int function"
+
+gdb_test "print v_unsigned_int_func" \
+    "$decimal = \{unsigned int \\(\\)\} 0x\[0-9a-z\]+ <v_unsigned_int_func>.*" \
+    "print unsigned int function"
+
+gdb_test "print v_long_func" \
+    "$decimal = \{long \\(\\)\} 0x\[0-9a-z\]+ <v_long_func>.*" \
+    "print long function"
+
+gdb_test "print v_signed_long_func" \
+    "$decimal = \{signed long|long \\(\\)\} 0x\[0-9a-z\]+ <v_signed_long_func>.*" \
+    "print signed long function"
+
+gdb_test "print v_unsigned_long_func" \
+    "$decimal = \{unsigned long|long \\(\\)\} 0x\[0-9a-z\]+ <v_unsigned_long_func>.*" \
+    "print unsigned long function"
+
+if ![target_info exists no_long_long] {
+    gdb_test "print v_long_long_func" \
+	    "$decimal = \{long long \\(\\)\} 0x\[0-9a-z\]+ <v_long_long_func>.*" \
+		"print long long function"
+
+    gdb_test "print v_signed_long_long_func" \
+	    "$decimal = \{long long \\(\\)\} 0x\[0-9a-z\]+ <v_signed_long_long_func>.*" \
+		"print signed long long function"
+
+    gdb_test "print v_unsigned_long_long_func" \
+	    "$decimal = \{unsigned long long \\(\\)\} 0x\[0-9a-z\]+ <v_unsigned_long_long_func>.*" \
+		"print unsigned long long function"
+}
+
+# Sun /bin/cc calls this a function returning double.
+if {!$gcc_compiled} then {setup_xfail "*-sun-sunos4*"}
+	gdb_test "print v_float_func" \
+	    "$decimal = \{float \\(\\)\} 0x\[0-9a-z\]+.*" \
+	    "print float function"
+
+	gdb_test "print v_double_func" \
+	    "$decimal = \{double \\(\\)\} 0x\[0-9a-z\]+.*" \
+	    "print double function" \
+}
+
+# test whatis command with functions return type
+gdb_test "whatis v_char_func" \
+    "type = (signed |unsigned |)char \\($void\\)" \
+    "whatis char function"
+
+gdb_test "whatis v_signed_char_func" \
+    "type = (signed |unsigned |)char \\($void\\)" \
+    "whatis signed char function"
+
+gdb_test "whatis v_unsigned_char_func" \
+    "type = unsigned char \\($void\\)"	\
+    "whatis unsigned char function"
+
+gdb_test "whatis v_short_func" \
+    "type = short (int |)\\($void\\)" \
+    "whatis short function"
+
+gdb_test "whatis v_signed_short_func" \
+    "type = (signed |)short (int |)\\($void\\)" \
+    "whatis signed short function"
+
+gdb_test "whatis v_unsigned_short_func" \
+    "type = (unsigned short|short unsigned int) \\($void\\)" \
+    "whatis unsigned short function"
+
+gdb_test "whatis v_int_func" \
+    "type = int \\($void\\)" \
+    "whatis int function"
+
+gdb_test "whatis v_signed_int_func" \
+    "type = (signed |)int \\($void\\)" \
+    "whatis signed int function"
+
+gdb_test "whatis v_unsigned_int_func" \
+    "type = unsigned int \\($void\\)" \
+    "whatis unsigned int function"
+
+gdb_test "whatis v_long_func" \
+    "type = (long|int|long int) \\($void\\)" \
+    "whatis long function"
+
+gdb_test "whatis v_signed_long_func" \
+    "type = (signed |)(int|long|long int) \\($void\\)" \
+    "whatis signed long function"
+
+gdb_test "whatis v_unsigned_long_func" \
+    "type = (unsigned (int|long|long int)|long unsigned int) \\($void\\)" \
+    "whatis unsigned long function"
+
+if ![target_info exists no_long_long] {
+    gdb_test "whatis v_long_long_func" \
+	"type = long long(| int) \\($void\\)" \
+	"whatis long long function"
+
+    gdb_test "whatis v_signed_long_long_func" \
+	"type = (signed |)long long(| int) \\($void\\)" \
+	"whatis signed long long function"
+
+    gdb_test "whatis v_unsigned_long_long_func" \
+	"type = (unsigned long long(| int)|long long unsigned int) \\($void\\)" \
+	"whatis unsigned long long function"
+}
+
+# Sun /bin/cc calls this a function returning double.
+if {!$gcc_compiled} then {setup_xfail "*-sun-sunos4*"}
+	gdb_test "whatis v_float_func" \
+	    "type = float \\($void\\)" \
+	    "whatis float function"
+
+	gdb_test "whatis v_double_func" \
+	    "type = double \\($void\\)" \
+	    "whatis double function" \
+}
-- 
1.8.3.1

[PATCH 2/5] CTF: set up debug info for function arguments

[Weimin Pan]

Added this support in read_func_kind_type after gcc started generating
CTF for function arguments.

Expanded gdb.base/ctf-ptype.exp to test function arguments. Also fixed
some typos.

---
 gdb/ctfread.c                        | 34 +++++++++++++++++++++++++++++++++-
 gdb/testsuite/gdb.base/ctf-ptype.exp | 19 ++++++++++++++++---
 2 files changed, 49 insertions(+), 4 deletions(-)

diff --git a/gdb/ctfread.c b/gdb/ctfread.c
index 5a68d9c..c75fe25 100644
--- a/gdb/ctfread.c
+++ b/gdb/ctfread.c
@@ -652,8 +652,10 @@ struct ctf_tid_and_type
 {
   struct objfile *of = ccp->of;
   ctf_dict_t *fp = ccp->fp;
-  struct type *type, *rettype;
+  struct type *type, *rettype, *atype;
   ctf_funcinfo_t cfi;
+  ctf_id_t *argv;
+  uint32_t argc;
 
   type = alloc_type (of);
 
@@ -663,6 +665,36 @@ struct ctf_tid_and_type
   TYPE_TARGET_TYPE (type) = rettype;
   set_type_align (type, ctf_type_align (fp, tid));
 
+  /* Set up function's arguments.  */
+  argc = cfi.ctc_argc;
+  type->set_num_fields (argc);
+  if (cfi.ctc_flags & CTF_FUNC_VARARG)
+    type->set_has_varargs (1);
+
+  if (argc != 0)
+    {
+      argv = XNEWVEC (ctf_id_t, argc);
+      if (ctf_func_type_args (fp, tid, argc, argv) == CTF_ERR)
+	{
+	  xfree (argv);
+	  return NULL;
+	}
+
+      type->set_fields
+	((struct field *) TYPE_ZALLOC (type, argc * sizeof (struct field)));
+      struct type *void_type = objfile_type (of)->builtin_void;
+      /* If failed to find the argument type, fill it with void_type.  */
+      for (int iparam = 0; iparam < argc; iparam++)
+	{
+	  atype = get_tid_type (of, argv[iparam]);
+	  if (atype)
+	    type->field (iparam).set_type (atype);
+	  else
+	    type->field (iparam).set_type (void_type);
+	}
+      xfree (argv);
+    }
+
   return set_tid_type (of, tid, type);
 }
 
diff --git a/gdb/testsuite/gdb.base/ctf-ptype.exp b/gdb/testsuite/gdb.base/ctf-ptype.exp
index ffe40f1..056f712 100644
--- a/gdb/testsuite/gdb.base/ctf-ptype.exp
+++ b/gdb/testsuite/gdb.base/ctf-ptype.exp
@@ -63,10 +63,10 @@ gdb_test "ptype struct t_struct" "type = struct t_struct \{.*\[\r\n\]    (unsign
 
 # Test the equivalence between '.' and '->' for struct member references.
 
-if [gdb_test "ptype v_t_struct_p.v_float_member"	"type = float"]<0 then {
+if [gdb_test "ptype v_struct1.v_float_member"	"type = float"]<0 then {
     return -1
 }
-if [gdb_test "ptype v_t_struct_p->v_float_member"	"type = float"]<0 then {
+if [gdb_test "ptype v_struct1->v_float_member"	"type = float"]<0 then {
     return -1
 }
 if [gdb_test "ptype v_t_struct_p.v_float_member"	"type = float"]<0 then {
@@ -211,7 +211,7 @@ gdb_test "ptype the_highest" \
 
 gdb_test "ptype the_highest.anonymous_level_1" \
          "type = struct \{.*\[\r\n\] *int b;.*\[\r\n\] *struct \{.*\[\r\n\] *int c;.*\[\r\n\] *\} anonymous_level_2;.*\[\r\n\]}.*" \
-         "ptype the_highest"
+         "ptype the_highest.anonymous_level_1"
 
 # Print the type of the identifier ID, and check the response:
 # - Expect to see PROTOTYPED as the type.  PROTOTYPED is not a regular
@@ -255,8 +255,21 @@ proc ptype_maybe_prototyped { id prototyped plain { overprototyped "NO-MATCH" }
     }
 }
 
+ptype_maybe_prototyped "func_type" "int (*)(int (*)(int, float), float)" \
+                                   "int (*)()"
 ptype_maybe_prototyped "old_fptr" "double (*)()" "double (*)()" \
                                   "double (*)(void)"
+ptype_maybe_prototyped "new_fptr" "double (*)()" "double (*)()"
+ptype_maybe_prototyped "fptr" "int (*)(int, float)" "int (*)()"
+ptype_maybe_prototyped "fptr2" "int *(*)(int (*)(int, float), float)" \
+                               "int *(*)()"
+ptype_maybe_prototyped "xptr" "int (*)(int (*)(), int (*)(), int)" \
+                              "int (*)()" \
+                              "int (*)(int (*)(void), int (*)(void), int)"
+ptype_maybe_prototyped "ffptr" "int (*(*)(char))(short int)" \
+                               "int (*(*)())()"
+ptype_maybe_prototyped "fffptr" "int (*(*(*)(char))(short int))(long int)" \
+                                "int (*(*(*)())())()"
 
 # Test printing type of string constants and array constants, but
 # requires a running process.  These call malloc, and can take a long
-- 
1.8.3.1

[PATCH 3/5] CTF: handle forward reference type

[Weimin Pan]

Added function fetch_tid_type which calls get_tid_type and will set up
the type, associated with a tid, if it is not read in yet. Also implement 
function read_forward_type which handles the CTF_K_FORWARD kind.

Expanded gdb.base/ctf-ptype.exp to add cases with forward references. 

---
 gdb/ctfread.c                        | 78 ++++++++++++++++++++++++++++++------
 gdb/testsuite/gdb.base/ctf-ptype.c   | 12 ++++++
 gdb/testsuite/gdb.base/ctf-ptype.exp |  2 +
 3 files changed, 79 insertions(+), 13 deletions(-)

diff --git a/gdb/ctfread.c b/gdb/ctfread.c
index c75fe25..931b609 100644
--- a/gdb/ctfread.c
+++ b/gdb/ctfread.c
@@ -186,6 +186,8 @@ static struct type *read_typedef_type (struct ctf_context *cp, ctf_id_t tid,
 static void process_struct_members (struct ctf_context *cp, ctf_id_t tid,
 				    struct type *type);
 
+static struct type *read_forward_type (struct ctf_context *cp, ctf_id_t tid);
+
 static struct symbol *new_symbol (struct ctf_context *cp, struct type *type,
 				  ctf_id_t tid);
 
@@ -269,6 +271,25 @@ struct ctf_tid_and_type
     return NULL;
 }
 
+/* Fetch the type for TID in CCP OF's tid_and_type hash, add the type to
+   context CCP if hash is empty or TID does not have a saved type.  */
+
+static struct type *
+fetch_tid_type (struct ctf_context *ccp, ctf_id_t tid)
+{
+  struct objfile *of = ccp->of;
+  struct type *typ;
+
+  typ = get_tid_type (of, tid);
+  if (typ == NULL)
+    {
+      ctf_add_type_cb (tid, ccp);
+      typ = get_tid_type (of, tid);
+    }
+
+  return typ;
+}
+
 /* Return the size of storage in bits for INTEGER, FLOAT, or ENUM.  */
 
 static int
@@ -368,7 +389,7 @@ struct ctf_tid_and_type
   FIELD_NAME (*fp) = name;
 
   kind = ctf_type_kind (ccp->fp, tid);
-  t = get_tid_type (ccp->of, tid);
+  t = fetch_tid_type (ccp, tid);
   if (t == NULL)
     {
       t = read_type_record (ccp, tid);
@@ -661,7 +682,7 @@ struct ctf_tid_and_type
 
   type->set_code (TYPE_CODE_FUNC);
   ctf_func_type_info (fp, tid, &cfi);
-  rettype = get_tid_type (of, cfi.ctc_return);
+  rettype = fetch_tid_type (ccp, cfi.ctc_return);
   TYPE_TARGET_TYPE (type) = rettype;
   set_type_align (type, ctf_type_align (fp, tid));
 
@@ -792,11 +813,11 @@ struct ctf_tid_and_type
       return NULL;
     }
 
-  element_type = get_tid_type (objfile, ar.ctr_contents);
+  element_type = fetch_tid_type (ccp, ar.ctr_contents);
   if (element_type == NULL)
     return NULL;
 
-  idx_type = get_tid_type (objfile, ar.ctr_index);
+  idx_type = fetch_tid_type (ccp, ar.ctr_index);
   if (idx_type == NULL)
     idx_type = objfile_type (objfile)->builtin_int;
 
@@ -824,7 +845,7 @@ struct ctf_tid_and_type
   struct objfile *objfile = ccp->of;
   struct type *base_type, *cv_type;
 
-  base_type = get_tid_type (objfile, btid);
+  base_type = fetch_tid_type (ccp, btid);
   if (base_type == NULL)
     {
       base_type = read_type_record (ccp, btid);
@@ -848,7 +869,7 @@ struct ctf_tid_and_type
   ctf_dict_t *fp = ccp->fp;
   struct type *base_type, *cv_type;
 
-  base_type = get_tid_type (objfile, btid);
+  base_type = fetch_tid_type (ccp, btid);
   if (base_type == NULL)
     {
       base_type = read_type_record (ccp, btid);
@@ -874,7 +895,7 @@ struct ctf_tid_and_type
   struct objfile *objfile = ccp->of;
   struct type *base_type, *cv_type;
 
-  base_type = get_tid_type (objfile, btid);
+  base_type = fetch_tid_type (ccp, btid);
   if (base_type == NULL)
     {
       base_type = read_type_record (ccp, btid);
@@ -901,7 +922,7 @@ struct ctf_tid_and_type
   char *aname = obstack_strdup (&objfile->objfile_obstack, name);
   this_type = init_type (objfile, TYPE_CODE_TYPEDEF, 0, aname);
   set_tid_type (objfile, tid, this_type);
-  target_type = get_tid_type (objfile, btid);
+  target_type = fetch_tid_type (ccp, btid);
   if (target_type != this_type)
     TYPE_TARGET_TYPE (this_type) = target_type;
   else
@@ -920,7 +941,7 @@ struct ctf_tid_and_type
   struct objfile *of = ccp->of;
   struct type *target_type, *type;
 
-  target_type = get_tid_type (of, btid);
+  target_type = fetch_tid_type (ccp, btid);
   if (target_type == NULL)
     {
       target_type = read_type_record (ccp, btid);
@@ -937,6 +958,34 @@ struct ctf_tid_and_type
   return set_tid_type (of, tid, type);
 }
 
+/* Read all information from a TID of CTF_K_FORWARD.  */
+
+static struct type *
+read_forward_type (struct ctf_context *ccp, ctf_id_t tid)
+{
+  struct objfile *of = ccp->of;
+  ctf_dict_t *fp = ccp->fp;
+  struct type *type;
+  uint32_t kind;
+
+  type = alloc_type (of);
+
+  gdb::unique_xmalloc_ptr<char> name (ctf_type_aname_raw (fp, tid));
+  if (name != NULL && strlen (name.get() ) != 0)
+    type->set_name (obstack_strdup (&of->objfile_obstack, name.get ()));
+
+  kind = ctf_type_kind_forwarded (fp, tid);
+  if (kind == CTF_K_UNION)
+    type->set_code (TYPE_CODE_UNION);
+  else
+    type->set_code (TYPE_CODE_STRUCT);
+
+  TYPE_LENGTH (type) = 0;
+  type->set_is_stub (true);
+
+  return set_tid_type (of, tid, type);
+}
+
 /* Read information associated with type TID.  */
 
 static struct type *
@@ -990,6 +1039,9 @@ struct ctf_tid_and_type
       case CTF_K_ARRAY:
 	type = read_array_type (ccp, tid);
 	break;
+      case CTF_K_FORWARD:
+	type = read_forward_type (ccp, tid);
+	break;
       case CTF_K_UNKNOWN:
 	break;
       default:
@@ -1136,7 +1188,7 @@ struct ctf_tid_and_type
   if ((tid = ctf_lookup_by_symbol (ccp->fp, idx)) == CTF_ERR)
     return NULL;
 
-  type = get_tid_type (ccp->of, tid);
+  type = fetch_tid_type (ccp, tid);
   if (type == NULL)
     return NULL;
 
@@ -1170,7 +1222,7 @@ struct ctf_tid_and_type
     return NULL;
 
   tid = ctf_lookup_by_symbol (ccp->fp, idx);
-  ftype = get_tid_type (ccp->of, tid);
+  ftype = fetch_tid_type (ccp, tid);
   if (finfo.ctc_flags & CTF_FUNC_VARARG)
     ftype->set_has_varargs (true);
   ftype->set_num_fields (argc);
@@ -1184,7 +1236,7 @@ struct ctf_tid_and_type
      to find the argument type.  */
   for (int iparam = 0; iparam < argc; iparam++)
     {
-      atyp = get_tid_type (ccp->of, argv[iparam]);
+      atyp = fetch_tid_type (ccp, argv[iparam]);
       if (atyp)
 	ftype->field (iparam).set_type (atyp);
       else
@@ -1192,7 +1244,7 @@ struct ctf_tid_and_type
     }
 
   sym = new_symbol (ccp, ftype, tid);
-  rettyp = get_tid_type (ccp->of, finfo.ctc_return);
+  rettyp = fetch_tid_type (ccp, finfo.ctc_return);
   if (rettyp != NULL)
     SYMBOL_TYPE (sym) = rettyp;
   else
diff --git a/gdb/testsuite/gdb.base/ctf-ptype.c b/gdb/testsuite/gdb.base/ctf-ptype.c
index cbc7815..51c7c68 100644
--- a/gdb/testsuite/gdb.base/ctf-ptype.c
+++ b/gdb/testsuite/gdb.base/ctf-ptype.c
@@ -124,6 +124,18 @@ struct {
    a symbol.  */
 t_struct3 v_struct3;
 
+/**** Some misc more complicated things *******/
+
+struct link {
+	struct link *next;
+#ifdef __STDC__
+	struct link *(*linkfunc) (struct link *self, int flags);
+#else
+	struct link *(*linkfunc) ();
+#endif
+	struct t_struct stuff[3];
+} *s_link;
+
 /**** unions *******/
 
 union t_union {
diff --git a/gdb/testsuite/gdb.base/ctf-ptype.exp b/gdb/testsuite/gdb.base/ctf-ptype.exp
index 056f712..7dd6d95 100644
--- a/gdb/testsuite/gdb.base/ctf-ptype.exp
+++ b/gdb/testsuite/gdb.base/ctf-ptype.exp
@@ -76,6 +76,8 @@ if [gdb_test "ptype v_t_struct_p->v_float_member"	"type = float"]<0 then {
     return -1
 }
 
+gdb_test "ptype struct link" "type = struct link \{\[\r\n\]+\[ \t\]+struct link \\*next;\[\r\n\]+\[ \t\]+struct link \\*\\(\\*linkfunc\\)\\((struct link \\*, int|void|)\\);\[\r\n\]+\[ \t\]+struct t_struct stuff.3.;\[\r\n\]+\}.*" "ptype linked list structure"
+
 #
 # test ptype command with unions
 #
-- 
1.8.3.1

[PATCH 4/5] CTF: add all members of an enum type to psymtab

[Weimin Pan]

With the following change which was made last April:

    [gdb] Use partial symbol table to find language for main
    commit d3214198119c1a2f9a6a2b8fcc56d8c324e1a245

The ctf reader was modified to enter all members of an enum type,
similar to what the dwarf2 reader did, into the psymtab or gdb
won't be able to find them. In addition, the empty name checking
needed to be moved down so members of a unnamed enum were not left
out. 

---
 gdb/ctfread.c | 30 +++++++++++++++++++++++++++---
 1 file changed, 27 insertions(+), 3 deletions(-)

diff --git a/gdb/ctfread.c b/gdb/ctfread.c
index 931b609..bf3a48c 100644
--- a/gdb/ctfread.c
+++ b/gdb/ctfread.c
@@ -1299,6 +1299,27 @@ struct ctf_tid_and_type
   return result;
 }
 
+/* Add all members of an enum with type TID to partial symbol table.  */
+
+static void
+ctf_psymtab_add_enums (struct ctf_context *ccp, ctf_id_t tid)
+{
+  int val;
+  const char *ename;
+  ctf_next_t *i = NULL;
+
+  while ((ename = ctf_enum_next (ccp->fp, tid, &i, &val)) != NULL)
+    {
+      ccp->pst->add_psymbol (ename, true,
+			     VAR_DOMAIN, LOC_CONST, -1,
+			     psymbol_placement::GLOBAL,
+			     0, language_c, ccp->of);
+    }
+  if (ctf_errno (ccp->fp) != ECTF_NEXT_END)
+    complaint (_("ctf_enum_next ctf_psymtab_add_enums failed - %s"),
+	       ctf_errmsg (ctf_errno (ccp->fp)));
+}
+
 /* Read in full symbols for PST, and anything it depends on.  */
 
 void
@@ -1420,17 +1441,17 @@ struct ctf_tid_and_type
 
   ccp = (struct ctf_context *) arg;
   gdb::unique_xmalloc_ptr<char> name (ctf_type_aname_raw (ccp->fp, tid));
-  if (name == NULL || strlen (name.get ()) == 0)
-    return 0;
 
   domain_enum domain = UNDEF_DOMAIN;
   enum address_class aclass = LOC_UNDEF;
   kind = ctf_type_kind (ccp->fp, tid);
   switch (kind)
     {
+      case CTF_K_ENUM:
+	ctf_psymtab_add_enums (ccp, tid);
+	/* FALL THROUGH */
       case CTF_K_STRUCT:
       case CTF_K_UNION:
-      case CTF_K_ENUM:
 	domain = STRUCT_DOMAIN;
 	aclass = LOC_TYPEDEF;
 	break;
@@ -1461,6 +1482,9 @@ struct ctf_tid_and_type
 	return 0;
     }
 
+  if (name == NULL || strlen (name.get ()) == 0)
+    return 0;
+
   ccp->pst->add_psymbol (name.get (), true,
 			 domain, aclass, section,
 			 psymbol_placement::GLOBAL,
-- 
1.8.3.1

[PATCH 5/5] CTF: multi-CU and archive support

[Weimin Pan]

Now gdb is capable of debugging executable, which consists of multiple 
compilation units, with CTF. An executable could potentially have one
or more archives, which, in CTF context, contain conflicting types.   
When comparing to DWARF2, there is a major difference in the type sections, 

all changes were made in ctfread.c where elfctf_build_psymtabs and 
scan_partial_symbols, with the new ctf_per_tu_data struct, were modify to 
handle archives which were treated as dependencies in gdb, via the ctf 
archive iterator and its callback build_ctf_archive_member, and were then 
expanded with expand_dependencies when psymtabs were expanded. 

Also changes were made to handle CTF's data object section and function
info section which now share the same format for their contents - an array 
of type IDs. New functions ctf_psymtab_add_stt_entries, which is called by 
ctf_psymtab_add_stt_obj and ctf_psymtab_add_stt_func, and add_stt_entries, 
which is called by add_stt_obj and add_stt_func when setting up psymtabs 
and full symtab, respectively.

---
 gdb/ChangeLog                                  |  20 ++
 gdb/ctfread.c                                  | 365 ++++++++++++++++---------
 gdb/testsuite/ChangeLog                        |  14 +
 gdb/testsuite/gdb.base/cross-tu-cyclic-1.c     |  18 ++
 gdb/testsuite/gdb.base/cross-tu-cyclic-2.c     |  16 ++
 gdb/testsuite/gdb.base/cross-tu-cyclic-3.c     |   3 +
 gdb/testsuite/gdb.base/cross-tu-cyclic-4.c     |   4 +
 gdb/testsuite/gdb.base/ctf-a.c                 |  32 +++
 gdb/testsuite/gdb.base/ctf-a.h                 |  22 ++
 gdb/testsuite/gdb.base/ctf-b.c                 |  25 ++
 gdb/testsuite/gdb.base/ctf-b.h                 |  22 ++
 gdb/testsuite/gdb.base/ctf-c.c                 |  25 ++
 gdb/testsuite/gdb.base/ctf-c.h                 |  21 ++
 gdb/testsuite/gdb.base/ctf-cross-tu-cyclic.exp |  43 +++
 gdb/testsuite/gdb.base/ctf-multi.exp           |  42 +++
 15 files changed, 540 insertions(+), 132 deletions(-)
 create mode 100644 gdb/testsuite/gdb.base/cross-tu-cyclic-1.c
 create mode 100644 gdb/testsuite/gdb.base/cross-tu-cyclic-2.c
 create mode 100644 gdb/testsuite/gdb.base/cross-tu-cyclic-3.c
 create mode 100644 gdb/testsuite/gdb.base/cross-tu-cyclic-4.c
 create mode 100644 gdb/testsuite/gdb.base/ctf-a.c
 create mode 100644 gdb/testsuite/gdb.base/ctf-a.h
 create mode 100644 gdb/testsuite/gdb.base/ctf-b.c
 create mode 100644 gdb/testsuite/gdb.base/ctf-b.h
 create mode 100644 gdb/testsuite/gdb.base/ctf-c.c
 create mode 100644 gdb/testsuite/gdb.base/ctf-c.h
 create mode 100644 gdb/testsuite/gdb.base/ctf-cross-tu-cyclic.exp
 create mode 100644 gdb/testsuite/gdb.base/ctf-multi.exp

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 9d928b0..7c3ec5a 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,23 @@
+2021-01-31  Weimin Pan  <weimin.pan@oracle.com>
+
+	* ctfread.c (ctf_per_tu_data): New struct.
+	(add_stt_entries): New funtion.
+	(add_stt_obj): Use it.
+	(add_stt_func): Likewise.
+	(ctf_psymtab_add_stt_entries): New function.
+	(ctf_psymtab_add_stt_obj): Use it.
+	(ctf_psymtab_add_stt_func): Likewise.
+	(ctf_psymtab::expand_psymtab): Call expand_dependencies to expand
+	archives.
+	(scan_partial_symbols): Set up partial symtab list.
+	(build_ctf_archive_member): New function.
+	(elfctf_build_psymtabs): Call Iterater to set up archives.
+	(ctf_psymtab_type_cb): call ctf_psymtab_add_enums.
+	(fetch_tid_type): New, use throughout file.
+	(read_func_kind_type): Set up function arguments.
+	(new_symbol): Set function address.
+	(read_func_kind_type): Remove incorrect type name setting.
+
 2021-01-29  Tom de Vries  <tdevries@suse.de>
 
 	PR breakpoints/26063
diff --git a/gdb/ctfread.c b/gdb/ctfread.c
index bf3a48c..d0636f1 100644
--- a/gdb/ctfread.c
+++ b/gdb/ctfread.c
@@ -80,6 +80,7 @@
 #include "complaints.h"
 #include "block.h"
 #include "ctfread.h"
+#include "objfiles.h"
 #include "psympriv.h"
 
 #if ENABLE_LIBCTF
@@ -116,6 +117,7 @@ struct ctf_context
   ctf_dict_t *fp;
   struct objfile *of;
   partial_symtab *pst;
+  ctf_archive_t *arc;
   struct buildsym_compunit *builder;
 };
 
@@ -162,6 +164,40 @@ struct ctf_field_info
   std::vector<struct decl_field> nested_types_list;
 };
 
+/* Persistent data held for a translation unit.  */
+
+struct ctf_per_tu_data
+{
+  ctf_dict_t *fp;
+  struct objfile *of;
+  ctf_archive_t *arc;
+  ctf_psymtab *parent_psymtab;
+  // struct partial_symtab *psymtab;
+  /* Push P to the back of IMPORTED_SYMTABS, allocated IMPORTED_SYMTABS
+     first if required.  */
+  void imported_symtabs_push (struct partial_symtab *p)
+  {
+    if (imported_symtabs == nullptr)
+      imported_symtabs = new std::vector <struct partial_symtab *>;
+    imported_symtabs->push_back (p);
+  }
+  /* Return the size of IMPORTED_SYMTABS if it is allocated, otherwise
+     return 0.  */
+  size_t imported_symtabs_size () const
+  {
+    if (imported_symtabs == nullptr)
+      return 0;
+    return imported_symtabs->size ();
+  }
+
+  /* Delete IMPORTED_SYMTABS and set the pointer back to nullptr.  */
+  void imported_symtabs_free ()
+  {
+    delete imported_symtabs;
+    imported_symtabs = nullptr;
+  }
+  std::vector <struct partial_symtab *> *imported_symtabs;
+};
 
 /* Local function prototypes */
 
@@ -241,10 +277,8 @@ struct ctf_tid_and_type
   ids.tid = tid;
   ids.type = typ;
   slot = (struct ctf_tid_and_type **) htab_find_slot (htab, &ids, INSERT);
-  if (*slot)
-    complaint (_("An internal GDB problem: ctf_ id_t %ld type already set"),
-	       (tid));
-  *slot = XOBNEW (&of->objfile_obstack, struct ctf_tid_and_type);
+  if (*slot == 0)
+    *slot = XOBNEW (&of->objfile_obstack, struct ctf_tid_and_type);
   **slot = ids;
   return typ;
 }
@@ -459,7 +493,7 @@ struct ctf_tid_and_type
   struct symbol *sym = NULL;
 
   gdb::unique_xmalloc_ptr<char> name (ctf_type_aname_raw (fp, tid));
-  if (name != NULL)
+  if (name != NULL && strcmp(name.get (), ""))
     {
       sym = new (&objfile->objfile_obstack) symbol;
       OBJSTAT (objfile, n_syms++);
@@ -948,7 +982,7 @@ struct ctf_tid_and_type
       if (target_type == NULL)
 	{
 	  complaint (_("read_pointer_type: NULL target type (%ld)"), btid);
-	  target_type = objfile_type (ccp->of)->builtin_error;
+	  target_type = objfile_type (of)->builtin_error;
 	}
     }
 
@@ -1060,6 +1094,12 @@ struct ctf_tid_and_type
   struct type *type;
   uint32_t kind;
 
+  if (info_verbose)
+    {
+      printf_filtered (_("ctf_add_type_cb adding tid %lx..."), tid);
+      gdb_flush (gdb_stdout);
+    }
+
   /* Check if tid's type has already been defined.  */
   type = get_tid_type (ccp->of, tid);
   if (type != NULL)
@@ -1146,7 +1186,8 @@ struct ctf_tid_and_type
 	if (type)
 	  {
 	    sym = new_symbol (ccp, type, id);
-	    sym->compute_and_set_names (name, false, ccp->of->per_bfd);
+	    if (sym)
+	      sym->compute_and_set_names (name, false, ccp->of->per_bfd);
 	  }
 	break;
       case CTF_K_STRUCT:
@@ -1176,81 +1217,48 @@ struct ctf_tid_and_type
   return 0;
 }
 
-/* Add an ELF STT_OBJ symbol with index IDX to the symbol table.  */
+/* Add entries in either data objects or function info section, controlled
+   by FUNCTIONS.  */
 
-static struct symbol *
-add_stt_obj (struct ctf_context *ccp, unsigned long idx)
+static void
+add_stt_entries (struct ctf_context *ccp, int functions)
 {
-  struct symbol *sym;
-  struct type *type;
+  ctf_next_t *i = NULL;
+  const char *tname;
   ctf_id_t tid;
+  struct symbol *sym = NULL;
+  struct type *type;
 
-  if ((tid = ctf_lookup_by_symbol (ccp->fp, idx)) == CTF_ERR)
-    return NULL;
-
-  type = fetch_tid_type (ccp, tid);
-  if (type == NULL)
-    return NULL;
-
-  sym = new_symbol (ccp, type, tid);
-
-  return sym;
+  while ((tid = ctf_symbol_next (ccp->fp, &i, &tname, functions)) != CTF_ERR)
+    {
+      type = get_tid_type (ccp->of, tid);
+      if (type == NULL)
+	continue;
+      sym = new (&ccp->of->objfile_obstack) symbol;
+      OBJSTAT (ccp->of, n_syms++);
+      SYMBOL_TYPE (sym) = type;
+      SYMBOL_DOMAIN (sym) = VAR_DOMAIN;
+      SYMBOL_ACLASS_INDEX (sym) = LOC_STATIC;
+      sym->compute_and_set_names (tname, false, ccp->of->per_bfd);
+      add_symbol_to_list (sym, ccp->builder->get_global_symbols ());
+      set_symbol_address (ccp->of, sym, tname);
+    }
 }
 
-/* Add an ELF STT_FUNC symbol with index IDX to the symbol table.  */
+/* Add entries in data objects section.  */
 
-static struct symbol *
-add_stt_func (struct ctf_context *ccp, unsigned long idx)
+static void
+add_stt_obj (struct ctf_context *ccp)
 {
-  struct type *ftype, *atyp, *rettyp;
-  struct symbol *sym;
-  ctf_funcinfo_t finfo;
-  ctf_id_t argv[32];
-  uint32_t argc;
-  ctf_id_t tid;
-  struct type *void_type = objfile_type (ccp->of)->builtin_void;
-
-  if (ctf_func_info (ccp->fp, idx, &finfo) == CTF_ERR)
-    return NULL;
-
-  argc = finfo.ctc_argc;
-  if (ctf_func_args (ccp->fp, idx, argc, argv) == CTF_ERR)
-    return NULL;
-
-  gdb::unique_xmalloc_ptr<char> name (ctf_type_aname_raw (ccp->fp, idx));
-  if (name == NULL)
-    return NULL;
-
-  tid = ctf_lookup_by_symbol (ccp->fp, idx);
-  ftype = fetch_tid_type (ccp, tid);
-  if (finfo.ctc_flags & CTF_FUNC_VARARG)
-    ftype->set_has_varargs (true);
-  ftype->set_num_fields (argc);
-
-  /* If argc is 0, it has a "void" type.  */
-  if (argc != 0)
-    ftype->set_fields
-      ((struct field *) TYPE_ZALLOC (ftype, argc * sizeof (struct field)));
+  add_stt_entries (ccp, 0);
+}
 
-  /* TYPE_FIELD_TYPE must never be NULL.  Fill it with void_type, if failed
-     to find the argument type.  */
-  for (int iparam = 0; iparam < argc; iparam++)
-    {
-      atyp = fetch_tid_type (ccp, argv[iparam]);
-      if (atyp)
-	ftype->field (iparam).set_type (atyp);
-      else
-	ftype->field (iparam).set_type (void_type);
-    }
+/* Add entries in function info section.  */
 
-  sym = new_symbol (ccp, ftype, tid);
-  rettyp = fetch_tid_type (ccp, finfo.ctc_return);
-  if (rettyp != NULL)
-    SYMBOL_TYPE (sym) = rettyp;
-  else
-    SYMBOL_TYPE (sym) = void_type;
-
-  return sym;
+static void
+add_stt_func (struct ctf_context *ccp)
+{
+  add_stt_entries (ccp, 1);
 }
 
 /* Get text segment base for OBJFILE, TSIZE contains the segment size.  */
@@ -1273,12 +1281,20 @@ struct ctf_tid_and_type
 		  struct objfile *of, CORE_ADDR text_offset)
 {
   struct ctf_context *ccp;
+  ctf_psymtab *dp;
 
   ccp = pst->context;
   ccp->builder = new buildsym_compunit
 		       (of, of->original_name, NULL,
 		       language_c, text_offset);
   ccp->builder->record_debugformat ("ctf");
+
+  for (int i = 0; i < pst->number_of_dependencies; i++)
+    {
+      dp = (ctf_psymtab *)pst->dependencies[i];
+      dp->context->builder = ccp->builder;
+      dp->context->of = of;
+    }
 }
 
 /* Finish reading symbol/type definitions in CTF format.
@@ -1320,46 +1336,94 @@ struct ctf_tid_and_type
 	       ctf_errmsg (ctf_errno (ccp->fp)));
 }
 
+/* Add entries in either data objects or function info section, controlled
+   by FUNCTIONS, to psymtab.  */
+
+static void
+ctf_psymtab_add_stt_entries (ctf_dict_t *cfp, ctf_psymtab *pst,
+			     struct objfile *of, int functions)
+{
+  ctf_next_t *i = NULL;
+  ctf_id_t tid;
+  const char *tname;
+
+  while ((tid = ctf_symbol_next (cfp, &i, &tname, functions)) != CTF_ERR)
+    {
+      uint32_t kind = ctf_type_kind (cfp, tid);
+      address_class aclass;
+      domain_enum tdomain;
+      switch (kind)
+	{
+	  case CTF_K_STRUCT:
+	  case CTF_K_UNION:
+	  case CTF_K_ENUM:
+	    tdomain = STRUCT_DOMAIN;
+	    break;
+	  default:
+	    tdomain = VAR_DOMAIN;
+	    break;
+	}
+
+      if (kind == CTF_K_FUNCTION)
+	aclass = LOC_STATIC;
+      else if (kind == CTF_K_CONST)
+	aclass = LOC_CONST;
+      else
+	aclass = LOC_TYPEDEF;
+
+      pst->add_psymbol (tname, true,
+			tdomain, aclass, -1,
+			psymbol_placement::GLOBAL,
+			0, language_c, of);
+    }
+}
+
+/* Add entries in data objects section to psymtab.  */
+
+static void
+ctf_psymtab_add_stt_obj (ctf_dict_t *cfp, ctf_psymtab *pst,
+			 struct objfile *of)
+{
+  ctf_psymtab_add_stt_entries (cfp, pst, of, 0);
+}
+
+/* Add entries in function info section to psymtab.  */
+
+static void
+ctf_psymtab_add_stt_func (ctf_dict_t *cfp, ctf_psymtab *pst,
+			  struct objfile *of)
+{
+  ctf_psymtab_add_stt_entries (cfp, pst, of, 1);
+}
+
 /* Read in full symbols for PST, and anything it depends on.  */
 
 void
 ctf_psymtab::expand_psymtab (struct objfile *objfile)
 {
-  struct symbol *sym;
   struct ctf_context *ccp;
 
   gdb_assert (!readin);
 
   ccp = context;
+  expand_dependencies (objfile);
 
   /* Iterate over entries in data types section.  */
   if (ctf_type_iter (ccp->fp, ctf_add_type_cb, ccp) == CTF_ERR)
-    complaint (_("ctf_type_iter psymtab_to_symtab failed - %s"),
+    complaint (_("ctf_type_iter expand_psymtab failed - %s"),
 	       ctf_errmsg (ctf_errno (ccp->fp)));
 
 
   /* Iterate over entries in variable info section.  */
   if (ctf_variable_iter (ccp->fp, ctf_add_var_cb, ccp) == CTF_ERR)
-    complaint (_("ctf_variable_iter psymtab_to_symtab failed - %s"),
+    complaint (_("ctf_variable_iter expand_psymtab failed - %s"),
 	       ctf_errmsg (ctf_errno (ccp->fp)));
 
   /* Add entries in data objects and function info sections.  */
-  for (unsigned long i = 0; ; i++)
-    {
-      sym = add_stt_obj (ccp, i);
-      if (sym == NULL)
-	{
-	  if (ctf_errno (ccp->fp) == EINVAL
-	      || ctf_errno (ccp->fp) == ECTF_NOSYMTAB)
-	    break;
-	  sym = add_stt_func (ccp, i);
-	}
-      if (sym == NULL)
-	continue;
-
-      set_symbol_address (ccp->of, sym, sym->linkage_name ());
-    }
+  add_stt_obj (ccp);
+  add_stt_func (ccp);
 
+  ctf_dict_close (ccp->fp);
   readin = true;
 }
 
@@ -1412,6 +1476,7 @@ struct ctf_tid_and_type
 
 static ctf_psymtab *
 create_partial_symtab (const char *name,
+		       ctf_archive_t *arc,
 		       ctf_dict_t *cfp,
 		       struct objfile *objfile)
 {
@@ -1421,10 +1486,11 @@ struct ctf_tid_and_type
   pst = new ctf_psymtab (name, objfile, 0);
 
   ccx = XOBNEW (&objfile->objfile_obstack, struct ctf_context);
+  ccx->arc = arc;
   ccx->fp = cfp;
+  ctf_ref (cfp);
   ccx->of = objfile;
   ccx->pst = pst;
-  ccx->builder = nullptr;
   pst->context = ccx;
 
   return pst;
@@ -1511,12 +1577,29 @@ struct ctf_tid_and_type
    debugging information is available.  */
 
 static void
-scan_partial_symbols (ctf_dict_t *cfp, struct objfile *of)
+scan_partial_symbols (ctf_dict_t *cfp,
+		      struct ctf_per_tu_data *pcu,
+		      const char *aname)
 {
-  bfd *abfd = of->obfd;
-  const char *name = bfd_get_filename (abfd);
-  ctf_psymtab *pst = create_partial_symtab (name, cfp, of);
+  struct objfile *of = pcu->of;
+  bool isparent = 0;
+
+  if (info_verbose)
+    {
+      printf_filtered (_("Scanning partial symbols for %s..."), aname);
+      gdb_flush (gdb_stdout);
+    }
+
+  if (strcmp (aname, ".ctf") == 0)
+    isparent = 1;
 
+  if (info_verbose)
+    {
+      printf_filtered (_("Creating partial symtab %s..."), aname);
+      gdb_flush (gdb_stdout);
+    }
+
+  ctf_psymtab *pst = create_partial_symtab (aname, pcu->arc, cfp, of);
   struct ctf_context *ccx = pst->context;
 
   if (ctf_type_iter (cfp, ctf_psymtab_type_cb, ccx) == CTF_ERR)
@@ -1530,46 +1613,39 @@ struct ctf_tid_and_type
   /* Scan CTF object and function sections which correspond to each
      STT_FUNC or STT_OBJECT entry in the symbol table,
      pick up what init_symtab has done.  */
-  for (unsigned long idx = 0; ; idx++)
-    {
-      ctf_id_t tid;
-      if ((tid = ctf_lookup_by_symbol (cfp, idx)) == CTF_ERR)
-	{
-	if (ctf_errno (cfp) == EINVAL || ctf_errno (cfp) == ECTF_NOSYMTAB)
-	  break;	// Done, reach end of the section.
-	else
-	  continue;
-	}
-      gdb::unique_xmalloc_ptr<char> tname (ctf_type_aname_raw (cfp, tid));
-      uint32_t kind = ctf_type_kind (cfp, tid);
-      address_class aclass;
-      domain_enum tdomain;
-      switch (kind)
-	{
-	  case CTF_K_STRUCT:
-	  case CTF_K_UNION:
-	  case CTF_K_ENUM:
-	    tdomain = STRUCT_DOMAIN;
-	    break;
-	  default:
-	    tdomain = VAR_DOMAIN;
-	    break;
-	}
+  ctf_psymtab_add_stt_obj (cfp, pst, of);
+  ctf_psymtab_add_stt_func (cfp, pst, of);
 
-      if (kind == CTF_K_FUNCTION)
-	aclass = LOC_STATIC;
-      else if (kind == CTF_K_CONST)
-	aclass = LOC_CONST;
-      else
-	aclass = LOC_TYPEDEF;
+  pst->end ();
 
-      pst->add_psymbol (tname.get (), true,
-			tdomain, aclass, -1,
-			psymbol_placement::STATIC,
-			0, language_c, of);
+  if (isparent)
+    pcu->parent_psymtab = pst;
+  else
+    pcu->imported_symtabs_push (pst);
+}
+
+/* Callback to build the psymtab for archive member NAME.  */
+
+static int
+build_ctf_archive_member (ctf_dict_t *ctf, const char *name, void *arg)
+{
+  struct ctf_per_tu_data *tup = (struct ctf_per_tu_data *) arg;
+  ctf_dict_t *parent = tup->fp;
+
+  if (strcmp (name, ".ctf") != 0)
+    {
+      ctf_import (ctf, parent);
     }
 
-  pst->end ();
+  if (info_verbose)
+    {
+      printf_filtered (_("Scanning archive member %s..."), name);
+      gdb_flush (gdb_stdout);
+    }
+
+  scan_partial_symbols (ctf, tup, name);
+
+  return 0;
 }
 
 /* Read CTF debugging information from a BFD section.  This is
@@ -1579,6 +1655,7 @@ struct ctf_tid_and_type
 void
 elfctf_build_psymtabs (struct objfile *of)
 {
+  struct ctf_per_tu_data pcu;
   bfd *abfd = of->obfd;
   int err;
 
@@ -1593,7 +1670,31 @@ struct ctf_tid_and_type
 	   bfd_get_filename (abfd), ctf_errmsg (err));
   ctf_dict_key.emplace (of, fp);
 
-  scan_partial_symbols (fp, of);
+  pcu.fp = fp;
+  pcu.of = of;
+  pcu.arc = arc;
+  pcu.imported_symtabs = nullptr;
+
+  if (ctf_archive_iter (arc, build_ctf_archive_member, &pcu) < 0)
+    error (_("ctf_archive_iter failed in input file %s: - %s"),
+	   bfd_get_filename (abfd), ctf_errmsg (err));
+
+  int arch_cnt = pcu.imported_symtabs_size ();
+  struct partial_symtab *parent_pst = pcu.parent_psymtab;
+
+  if (parent_pst && arch_cnt)
+    {
+      /* Fill in the 'dependencies'.  */
+      parent_pst->number_of_dependencies = arch_cnt;
+      parent_pst->dependencies
+	= of->partial_symtabs->allocate_dependencies (arch_cnt);
+      for (int i = 0; i < arch_cnt; ++i)
+	{
+	  parent_pst->dependencies[i]
+	    = pcu.imported_symtabs->at (i);
+	}
+      pcu.imported_symtabs_free ();
+    }
 }
 
 #else
diff --git a/gdb/testsuite/ChangeLog b/gdb/testsuite/ChangeLog
index 36ba5d0..562eb5f 100644
--- a/gdb/testsuite/ChangeLog
+++ b/gdb/testsuite/ChangeLog
@@ -1,3 +1,17 @@
+2021-01-31  Weimin Pan  <weimin.pan@oracle.com>
+
+	* gdb.base/ctf-cross-tu-cyclic.exp: New file.
+	* gdb.base/ctf-multi.exp: New file.
+	* gdb.base/ctf-ptype.c: Add struct link containing a forward reference
+	type.
+	* gdb.base/ctf-ptype.exp: Add "ptype struct link"
+	* gdb.base/ctf-ptype.exp: Add function tests and fix typos.
+	* gdb.base/ctf-funcreturn.exp: New file.
+
+2021-01-20  Simon Marchi  <simon.marchi@polymtl.ca>
+
+	* lib/tuiterm.exp: Rename _cur_x/_cur_y to _cur_col/_cur_row.
+
 2021-01-29  Tom de Vries  <tdevries@suse.de>
 
 	PR breakpoints/26063
diff --git a/gdb/testsuite/gdb.base/cross-tu-cyclic-1.c b/gdb/testsuite/gdb.base/cross-tu-cyclic-1.c
new file mode 100644
index 0000000..fe52b9e
--- /dev/null
+++ b/gdb/testsuite/gdb.base/cross-tu-cyclic-1.c
@@ -0,0 +1,18 @@
+struct A;
+struct B
+{
+  int foo;
+  struct A *bar;
+};
+
+struct A
+{
+  long a;
+  struct B *foo;
+};
+
+static struct A *foo __attribute__((used));
+
+int main()
+{
+}
diff --git a/gdb/testsuite/gdb.base/cross-tu-cyclic-2.c b/gdb/testsuite/gdb.base/cross-tu-cyclic-2.c
new file mode 100644
index 0000000..aa2d177
--- /dev/null
+++ b/gdb/testsuite/gdb.base/cross-tu-cyclic-2.c
@@ -0,0 +1,16 @@
+struct B;
+struct A
+{
+  long a;
+  struct B *foo;
+  struct C *bar;
+};
+
+struct C
+{
+  struct B *foo;
+  int b;
+};
+
+static struct C *foo __attribute__((used));
+static struct A *bar __attribute__((used));
diff --git a/gdb/testsuite/gdb.base/cross-tu-cyclic-3.c b/gdb/testsuite/gdb.base/cross-tu-cyclic-3.c
new file mode 100644
index 0000000..19947e8
--- /dev/null
+++ b/gdb/testsuite/gdb.base/cross-tu-cyclic-3.c
@@ -0,0 +1,3 @@
+struct A { struct B *foo; };
+static struct A *a __attribute__((__used__));
+static struct A *conflicty __attribute__((__used__));
diff --git a/gdb/testsuite/gdb.base/cross-tu-cyclic-4.c b/gdb/testsuite/gdb.base/cross-tu-cyclic-4.c
new file mode 100644
index 0000000..6e0c957
--- /dev/null
+++ b/gdb/testsuite/gdb.base/cross-tu-cyclic-4.c
@@ -0,0 +1,4 @@
+struct A { struct B *foo; };
+struct B { struct B *next; };
+static struct A *a __attribute__((__used__));
+static struct B *conflicty __attribute__((__used__));
diff --git a/gdb/testsuite/gdb.base/ctf-a.c b/gdb/testsuite/gdb.base/ctf-a.c
new file mode 100644
index 0000000..f514a33
--- /dev/null
+++ b/gdb/testsuite/gdb.base/ctf-a.c
@@ -0,0 +1,32 @@
+/* This test program is part of GDB, the GNU debugger.
+
+   Copyright 2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include "ctf-a.h"
+
+static struct A a __attribute__((used));
+
+extern struct C *foo ();
+extern int bar ();
+
+int main ()
+{
+  struct C *cp;
+  cp = foo ();
+  if (cp) 
+    return bar ();
+  return 0;
+}
diff --git a/gdb/testsuite/gdb.base/ctf-a.h b/gdb/testsuite/gdb.base/ctf-a.h
new file mode 100644
index 0000000..297d740
--- /dev/null
+++ b/gdb/testsuite/gdb.base/ctf-a.h
@@ -0,0 +1,22 @@
+/* This test program is part of GDB, the GNU debugger.
+
+   Copyright 2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+struct A {
+  struct B *b;
+  struct A *next;
+};
+
diff --git a/gdb/testsuite/gdb.base/ctf-b.c b/gdb/testsuite/gdb.base/ctf-b.c
new file mode 100644
index 0000000..c3a8ce5
--- /dev/null
+++ b/gdb/testsuite/gdb.base/ctf-b.c
@@ -0,0 +1,25 @@
+/* This test program is part of GDB, the GNU debugger.
+
+   Copyright 2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include "ctf-b.h"
+
+static struct B b __attribute__((used));
+
+int bar ()
+{
+  return b.wombat;
+}
diff --git a/gdb/testsuite/gdb.base/ctf-b.h b/gdb/testsuite/gdb.base/ctf-b.h
new file mode 100644
index 0000000..9dbdd7d
--- /dev/null
+++ b/gdb/testsuite/gdb.base/ctf-b.h
@@ -0,0 +1,22 @@
+/* This test program is part of GDB, the GNU debugger.
+
+   Copyright 2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+struct B {
+  struct C *c;
+  int wombat;
+};
+
diff --git a/gdb/testsuite/gdb.base/ctf-c.c b/gdb/testsuite/gdb.base/ctf-c.c
new file mode 100644
index 0000000..50db511
--- /dev/null
+++ b/gdb/testsuite/gdb.base/ctf-c.c
@@ -0,0 +1,25 @@
+/* This test program is part of GDB, the GNU debugger.
+
+   Copyright 2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include "ctf-c.h"
+
+static struct C c __attribute__((used));
+
+struct C * foo ()
+{
+  return &c;
+} 
diff --git a/gdb/testsuite/gdb.base/ctf-c.h b/gdb/testsuite/gdb.base/ctf-c.h
new file mode 100644
index 0000000..fb18157
--- /dev/null
+++ b/gdb/testsuite/gdb.base/ctf-c.h
@@ -0,0 +1,21 @@
+/* This test program is part of GDB, the GNU debugger.
+
+   Copyright 2021 Free Software Foundation, Inc.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+struct C {
+  struct A *a;
+  int b;
+};
diff --git a/gdb/testsuite/gdb.base/ctf-cross-tu-cyclic.exp b/gdb/testsuite/gdb.base/ctf-cross-tu-cyclic.exp
new file mode 100644
index 0000000..2c5ad8d
--- /dev/null
+++ b/gdb/testsuite/gdb.base/ctf-cross-tu-cyclic.exp
@@ -0,0 +1,43 @@
+# Copyright 2021 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# This file is a subset of ptype.exp written by Rob Savoye. (rob@cygnus.com)
+
+if [skip_ctf_tests] {
+    unsupported "no CTF debug format support, or CTF disabled in GDB"
+    return 0
+}
+
+standard_testfile cross-tu-cyclic-1.c  cross-tu-cyclic-2.c \
+	cross-tu-cyclic-3.c  cross-tu-cyclic-4.c
+
+# Using `-gt` generates full-fledged CTF debug information.
+set opts "additional_flags=-gt -Wl,--export-dynamic"
+if { [prepare_for_testing "failed to prepare" ${testfile} \
+	  [list $srcfile $srcfile2 $srcfile3 $srcfile4] \
+	  [list $opts nowarnings]] } {
+    return 0
+}
+
+# Create and source the file that provides information about the compiler
+# used to compile the test case.
+if [get_compiler_info] {
+    return -1
+}
+
+# Same thing with struct and union.
+gdb_test "ptype struct A" "type = struct A \{\[\r\n\]+\[ \t\]+long a;\[\r\n\]+\[ \t\]+struct B \\*foo;\[\r\n\]+\}.*" "ptype structure A" 
+gdb_test "ptype struct B" "type = struct B \{\[\r\n\]+\[ \t\]+int foo;\[\r\n\]+\[ \t\]+struct A \\*bar;\[\r\n\]+\}.*" "ptype structure B" 
+gdb_test "ptype struct C" "type = struct C \{\[\r\n\]+\[ \t\]+struct B \\*foo;\[\r\n\]+\[ \t\]+int b;\[\r\n\]+\}.*" "ptype structure C" 
diff --git a/gdb/testsuite/gdb.base/ctf-multi.exp b/gdb/testsuite/gdb.base/ctf-multi.exp
new file mode 100644
index 0000000..8e99f23
--- /dev/null
+++ b/gdb/testsuite/gdb.base/ctf-multi.exp
@@ -0,0 +1,42 @@
+# Copyright 2021 Free Software Foundation, Inc.
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+# This file is a subset of ptype.exp written by Rob Savoye. (rob@cygnus.com)
+
+if [skip_ctf_tests] {
+    unsupported "no CTF debug format support, or CTF disabled in GDB"
+    return 0
+}
+
+standard_testfile ctf-a.c ctf-b.c ctf-c.c
+
+# Using `-gt` generates full-fledged CTF debug information.
+set opts "additional_flags=-gt -Wl,--export-dynamic"
+if { [prepare_for_testing "failed to prepare" ${testfile} \
+	  [list $srcfile $srcfile2 $srcfile3] \
+	  [list $opts nowarnings]] } {
+    return 0
+}
+
+# Create and source the file that provides information about the compiler
+# used to compile the test case.
+if [get_compiler_info] {
+    return -1
+}
+
+# Same thing with struct and union.
+gdb_test "ptype struct A" "type = struct A \{\[\r\n\]+\[ \t\]+struct B \\*b;\[\r\n\]+\[ \t\]+struct A \\*next;\[\r\n\]+\}.*" "ptype structure A" 
+gdb_test "ptype struct B" "type = struct B \{\[\r\n\]+\[ \t\]+struct C \\*c;\[\r\n\]+\[ \t\]+int \\wombat;\[\r\n\]+\}.*" "ptype structure B" 
+gdb_test "ptype struct C" "type = struct C \{\[\r\n\]+\[ \t\]+struct A \\*a;\[\r\n\]+\[ \t\]+int b;\[\r\n\]+\}.*" "ptype structure C" 
-- 
1.8.3.1

Re: [PATCH 1/5] CTF: fix incorrect function return type

[Tom Tromey]

>>>>> ">" == Weimin Pan via Gdb-patches <gdb-patches@sourceware.org> writes:

This patch needs ChangeLog entries.

>>  gdb/ctfread.c                             |   5 +-
>>  gdb/testsuite/gdb.base/ctf-funcreturn.exp | 190 ++++++++++++++++++++++++++++++

How about we make gdb/testsuite/gdb.ctf and put new CTF tests there?

Tom

Re: [PATCH 2/5] CTF: set up debug info for function arguments

[Tom Tromey]

>>>>> ">" == Weimin Pan via Gdb-patches <gdb-patches@sourceware.org> writes:

>> Added this support in read_func_kind_type after gcc started generating
>> CTF for function arguments.

>> Expanded gdb.base/ctf-ptype.exp to test function arguments. Also fixed
>> some typos.

Thank you.

This needs ChangeLog entries.

>> ---
>>  gdb/ctfread.c                        | 34 +++++++++++++++++++++++++++++++++-
>>  gdb/testsuite/gdb.base/ctf-ptype.exp | 19 ++++++++++++++++---

I guess the two existing ctf tests could also be moved to the proposed
gdb.ctf.  What do you think?  If you agree, this would make sense to do
as a separate "FYI" patch.

>> +  /* Set up function's arguments.  */
>> +  argc = cfi.ctc_argc;
>> +  type->set_num_fields (argc);
>> +  if (cfi.ctc_flags & CTF_FUNC_VARARG)
>> +    type->set_has_varargs (1);

Should be 'true' instead of '1'.

>> +      argv = XNEWVEC (ctf_id_t, argc);

gdb style is to use a std::vector for this kind of thing now.
That way you can remove the explicit memory management.

Tom

Re: [PATCH 3/5] CTF: handle forward reference type

[Tom Tromey]

>>>>> "Weimin" == Weimin Pan via Gdb-patches <gdb-patches@sourceware.org> writes:

Weimin> Added function fetch_tid_type which calls get_tid_type and will set up
Weimin> the type, associated with a tid, if it is not read in yet. Also implement 
Weimin> function read_forward_type which handles the CTF_K_FORWARD kind.

Weimin> Expanded gdb.base/ctf-ptype.exp to add cases with forward references. 

I don't really know the CTF code, but I didn't see any problems from a
generic gdb point of view.

Weimin> +  gdb::unique_xmalloc_ptr<char> name (ctf_type_aname_raw (fp, tid));
Weimin> +  if (name != NULL && strlen (name.get() ) != 0)
Weimin> +    type->set_name (obstack_strdup (&of->objfile_obstack, name.get ()));

If CTF is address-space-independent (suspect so) you may wish to
consider changing it someday to store the psymbols on the per-BFD
object.  This would speed up some multi-inferior scenarios.

Tom

Re: [PATCH 1/5] CTF: fix incorrect function return type

[Wei-min Pan]

On 2/5/2021 7:33 AM, Tom Tromey wrote:
>>>>>> ">" == Weimin Pan via Gdb-patches <gdb-patches@sourceware.org> writes:
> This patch needs ChangeLog entries.

Thanks for the comments, Tom. I had ChangeLog entry in each patch originally
but decided to summarize them (both gdb/ChangeLog and testsuite/ChangeLog)
in the last patch. I can switch back to including them in each patch if 
that is the
way to go.

>>>   gdb/ctfread.c                             |   5 +-
>>>   gdb/testsuite/gdb.base/ctf-funcreturn.exp | 190 ++++++++++++++++++++++++++++++
> How about we make gdb/testsuite/gdb.ctf and put new CTF tests there?

I think what Andrew Burgess did to merge CTF tests into single test scripts,
e.g. whatis.exp, is what we want to eventually be for the rest of the 
CTF tests.
But it's also fine to put all the CTF tests under a new directory.

> Tom

Re: [PATCH 2/5] CTF: set up debug info for function arguments

[Wei-min Pan]

On 2/5/2021 7:40 AM, Tom Tromey wrote:
>>>>>> ">" == Weimin Pan via Gdb-patches <gdb-patches@sourceware.org> writes:
>>> Added this support in read_func_kind_type after gcc started generating
>>> CTF for function arguments.
>>> Expanded gdb.base/ctf-ptype.exp to test function arguments. Also fixed
>>> some typos.
> Thank you.
>
> This needs ChangeLog entries.
>
>>> ---
>>>   gdb/ctfread.c                        | 34 +++++++++++++++++++++++++++++++++-
>>>   gdb/testsuite/gdb.base/ctf-ptype.exp | 19 ++++++++++++++++---
> I guess the two existing ctf tests could also be moved to the proposed
> gdb.ctf.  What do you think?  If you agree, this would make sense to do
> as a separate "FYI" patch.

As previously noted, I'm fine with adding gdb.ctf if there is no objection.
But I prefer the current approach of merging CTF tests into the baseline.

>
>>> +  /* Set up function's arguments.  */
>>> +  argc = cfi.ctc_argc;
>>> +  type->set_num_fields (argc);
>>> +  if (cfi.ctc_flags & CTF_FUNC_VARARG)
>>> +    type->set_has_varargs (1);
> Should be 'true' instead of '1'.

OK, will do.

>
>>> +      argv = XNEWVEC (ctf_id_t, argc);
>>>
> gdb style is to use a std::vector for this kind of thing now.
> That way you can remove the explicit memory management.

OK, thanks. Will change it to

         std::vector<ctf_id_t> argv (argc);

and remove the xfree calls.

>
> Tom

Re: [PATCH 3/5] CTF: handle forward reference type

[Wei-min Pan]

On 2/5/2021 7:42 AM, Tom Tromey wrote:
>>>>>> "Weimin" == Weimin Pan via Gdb-patches <gdb-patches@sourceware.org> writes:
> Weimin> Added function fetch_tid_type which calls get_tid_type and will set up
> Weimin> the type, associated with a tid, if it is not read in yet. Also implement
> Weimin> function read_forward_type which handles the CTF_K_FORWARD kind.
>
> Weimin> Expanded gdb.base/ctf-ptype.exp to add cases with forward references.
>
> I don't really know the CTF code, but I didn't see any problems from a
> generic gdb point of view.
>
> Weimin> +  gdb::unique_xmalloc_ptr<char> name (ctf_type_aname_raw (fp, tid));
> Weimin> +  if (name != NULL && strlen (name.get() ) != 0)
> Weimin> +    type->set_name (obstack_strdup (&of->objfile_obstack, name.get ()));
>
> If CTF is address-space-independent (suspect so) you may wish to
> consider changing it someday to store the psymbols on the per-BFD
> object.  This would speed up some multi-inferior scenarios.

Yes, it is. Will look into and keep that in mind. Thanks.

>
> Tom