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[commit] varobj/Ada: Missing children for interface-wide tagged types
- From: Joel Brobecker <brobecker at adacore dot com>
- To: gdb-patches at sourceware dot org
- Date: Tue, 7 Jan 2014 08:37:29 +0400
- Subject: [commit] varobj/Ada: Missing children for interface-wide tagged types
- Authentication-results: sourceware.org; auth=none
Consider the following code:
type Element is abstract tagged null record;
type GADataType is interface;
type Data_Type is new Element and GADataType with record
I : Integer := 42;
end record;
Result1 : Data_Type;
GGG1 : GADataType'Class := GADataType'Class (Result1);
When trying to create a varobj for variable ggg1, GDB currently
returns an object which has no child:
-var-create ggg1 * ggg1
^done,name="ggg1",numchild="0",[...]
This is incorrect, it should return an object which has one child
(field "i"). This is because tagged-type objects are dynamic, and
we need to apply a small transformation in order to get their actual
type. This is already done on the GDB/CLI side in ada-valprint,
and it needs to be done on the ada-varobj side as well.
gdb/ChangeLog:
* ada-varobj.c (ada_varobj_adjust_for_child_access): Convert
tagged type objects to their actual type.
gdb/testsuite/ChangeLog:
* gdb.ada/mi_interface: New testcase.
Tested on x86_64-linux and pushed.
---
gdb/ada-varobj.c | 9 ++++++
gdb/testsuite/gdb.ada/mi_interface.exp | 52 ++++++++++++++++++++++++++++++
gdb/testsuite/gdb.ada/mi_interface/foo.adb | 23 +++++++++++++
gdb/testsuite/gdb.ada/mi_interface/pck.adb | 21 ++++++++++++
gdb/testsuite/gdb.ada/mi_interface/pck.ads | 28 ++++++++++++++++
5 files changed, 133 insertions(+)
create mode 100644 gdb/testsuite/gdb.ada/mi_interface.exp
create mode 100644 gdb/testsuite/gdb.ada/mi_interface/foo.adb
create mode 100644 gdb/testsuite/gdb.ada/mi_interface/pck.adb
create mode 100644 gdb/testsuite/gdb.ada/mi_interface/pck.ads
diff --git a/gdb/ada-varobj.c b/gdb/ada-varobj.c
index aab7335..3da6018 100644
--- a/gdb/ada-varobj.c
+++ b/gdb/ada-varobj.c
@@ -219,6 +219,15 @@ ada_varobj_adjust_for_child_access (struct value **value,
&& !ada_is_array_descriptor_type (TYPE_TARGET_TYPE (*type))
&& !ada_is_constrained_packed_array_type (TYPE_TARGET_TYPE (*type)))
ada_varobj_ind (*value, *type, value, type);
+
+ /* If this is a tagged type, we need to transform it a bit in order
+ to be able to fetch its full view. As always with tagged types,
+ we can only do that if we have a value. */
+ if (*value != NULL && ada_is_tagged_type (*type, 1))
+ {
+ *value = ada_tag_value_at_base_address (*value);
+ *type = value_type (*value);
+ }
}
/* Assuming that the (PARENT_VALUE, PARENT_TYPE) pair is an array
diff --git a/gdb/testsuite/gdb.ada/mi_interface.exp b/gdb/testsuite/gdb.ada/mi_interface.exp
new file mode 100644
index 0000000..4a2da84
--- /dev/null
+++ b/gdb/testsuite/gdb.ada/mi_interface.exp
@@ -0,0 +1,52 @@
+# Copyright 2014 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/>.
+
+load_lib "ada.exp"
+
+standard_ada_testfile foo
+
+if {[gdb_compile_ada "${srcfile}" "${binfile}" executable [list debug additional_flags=-gnat12 ]] != "" } {
+ return -1
+}
+
+load_lib mi-support.exp
+set MIFLAGS "-i=mi"
+
+gdb_exit
+if [mi_gdb_start] {
+ continue
+}
+
+mi_delete_breakpoints
+mi_gdb_reinitialize_dir $srcdir/$subdir
+mi_gdb_load ${binfile}
+
+if ![mi_run_to_main] then {
+ fail "Cannot run to main, testcase aborted"
+ return 0
+}
+
+set bp_location [gdb_get_line_number "BREAK" ${testdir}/foo.adb]
+mi_continue_to_line \
+ "foo.adb:$bp_location" \
+ "stop at start of main Ada procedure"
+
+mi_gdb_test "-var-create ggg1 * ggg1" \
+ "\\^done,name=\"ggg1\",numchild=\"1\",value=\"{...}\",type=\"<ref> pck.gadatatype\",has_more=\"0\"" \
+ "Create ggg1 varobj"
+
+mi_gdb_test "-var-list-children 1 ggg1" \
+ "\\^done,numchild=\"1\",children=\\\[child={name=\"ggg1.i\",exp=\"i\",numchild=\"0\",value=\"42\",type=\"integer\"}\\\],has_more=\"0\"" \
+ "list ggg1's children"
diff --git a/gdb/testsuite/gdb.ada/mi_interface/foo.adb b/gdb/testsuite/gdb.ada/mi_interface/foo.adb
new file mode 100644
index 0000000..c0ea889
--- /dev/null
+++ b/gdb/testsuite/gdb.ada/mi_interface/foo.adb
@@ -0,0 +1,23 @@
+-- Copyright 2014 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/>.
+
+with Pck; use Pck;
+
+procedure Foo is
+ Result1 : Data_Type;
+ GGG1 : GADataType'Class := GADataType'Class (Result1);
+begin
+ Do_Nothing (GGG1'Address); -- BREAK
+end Foo;
diff --git a/gdb/testsuite/gdb.ada/mi_interface/pck.adb b/gdb/testsuite/gdb.ada/mi_interface/pck.adb
new file mode 100644
index 0000000..2b31332
--- /dev/null
+++ b/gdb/testsuite/gdb.ada/mi_interface/pck.adb
@@ -0,0 +1,21 @@
+-- Copyright 2014 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/>.
+
+package body Pck is
+ procedure Do_Nothing (A : System.Address) is
+ begin
+ null;
+ end Do_Nothing;
+end Pck;
diff --git a/gdb/testsuite/gdb.ada/mi_interface/pck.ads b/gdb/testsuite/gdb.ada/mi_interface/pck.ads
new file mode 100644
index 0000000..b186678
--- /dev/null
+++ b/gdb/testsuite/gdb.ada/mi_interface/pck.ads
@@ -0,0 +1,28 @@
+-- Copyright 2014 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/>.
+
+with System;
+
+package Pck is
+
+ type Element is abstract tagged null record;
+ type GADataType is interface;
+
+ type Data_Type is new Element and GADataType with record
+ I : Integer := 42;
+ end record;
+
+ procedure Do_Nothing (A : System.Address);
+end Pck;
--
1.8.3.2