* [PATCH][gdb/symtab] Handle named DW_TAG_unspecified_type DIE
@ 2022-09-09 9:32 Tom de Vries
2022-09-16 15:15 ` Tom de Vries
0 siblings, 1 reply; 2+ messages in thread
From: Tom de Vries @ 2022-09-09 9:32 UTC (permalink / raw)
To: gdb-patches
Hi,
With the test-case included in the patch, we run into:
...
(gdb) info types -q std::nullptr_t^M
During symbol reading: unsupported tag: 'DW_TAG_unspecified_type'^M
^M
File /usr/include/c++/7/x86_64-suse-linux/bits/c++config.h:^M
2198: typedef decltype(nullptr) std::nullptr_t;^M
(gdb) FAIL: gdb.dwarf2/nullptr_t.exp: info types -q std::nullptr_t \
without complaint
...
Fix the complaint by handling DW_TAG_unspecified_type in new_symbol, and verify
in the test-case using "maint print symbols" that the symbol exists.
Tested on x86_64-linux, with gcc 7.5.0 and clang 13.0.
Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=17271
Any comments?
Thanks,
- Tom
[gdb/symtab] Handle named DW_TAG_unspecified_type DIE
---
gdb/dwarf2/read.c | 1 +
gdb/testsuite/gdb.dwarf2/nullptr_t.cc | 29 +++++++++++++++++++++++++
gdb/testsuite/gdb.dwarf2/nullptr_t.exp | 39 ++++++++++++++++++++++++++++++++++
3 files changed, 69 insertions(+)
diff --git a/gdb/dwarf2/read.c b/gdb/dwarf2/read.c
index 3ca441c4cae..a382d217def 100644
--- a/gdb/dwarf2/read.c
+++ b/gdb/dwarf2/read.c
@@ -21063,6 +21063,7 @@ new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu,
case DW_TAG_base_type:
case DW_TAG_subrange_type:
case DW_TAG_generic_subrange:
+ case DW_TAG_unspecified_type:
sym->set_aclass_index (LOC_TYPEDEF);
sym->set_domain (VAR_DOMAIN);
list_to_add = cu->list_in_scope;
diff --git a/gdb/testsuite/gdb.dwarf2/nullptr_t.cc b/gdb/testsuite/gdb.dwarf2/nullptr_t.cc
new file mode 100644
index 00000000000..85fe801e193
--- /dev/null
+++ b/gdb/testsuite/gdb.dwarf2/nullptr_t.cc
@@ -0,0 +1,29 @@
+/* This testcase is part of GDB, the GNU debugger.
+
+ Copyright 2022 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 <cstddef>
+
+void
+foo (std::nullptr_t)
+{
+}
+
+int
+main (void)
+{
+ foo (nullptr);
+}
diff --git a/gdb/testsuite/gdb.dwarf2/nullptr_t.exp b/gdb/testsuite/gdb.dwarf2/nullptr_t.exp
new file mode 100644
index 00000000000..c597c660a36
--- /dev/null
+++ b/gdb/testsuite/gdb.dwarf2/nullptr_t.exp
@@ -0,0 +1,39 @@
+# Copyright 2022 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_cplus_tests]} { continue }
+
+standard_testfile .cc
+
+if [prepare_for_testing "failed to prepare" $testfile $srcfile {debug c++}] {
+ return -1
+}
+
+set cmd "info types -q std::nullptr_t"
+
+set re \
+ [multi_line \
+ "$cmd" \
+ "" \
+ "File .*:" \
+ "$decimal:\ttypedef decltype\\(nullptr\\) std::nullptr_t;"]
+
+with_complaints 5 {
+ gdb_test $cmd $re "$cmd without complaints"
+}
+
+gdb_test "maint print symbols -source $srcfile" \
+ "typedef void decltype\\(nullptr\\); \r\n.*" \
+ "decltype(nullptr) symbol"
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH][gdb/symtab] Handle named DW_TAG_unspecified_type DIE
2022-09-09 9:32 [PATCH][gdb/symtab] Handle named DW_TAG_unspecified_type DIE Tom de Vries
@ 2022-09-16 15:15 ` Tom de Vries
0 siblings, 0 replies; 2+ messages in thread
From: Tom de Vries @ 2022-09-16 15:15 UTC (permalink / raw)
To: gdb-patches
On 9/9/22 11:32, Tom de Vries wrote:
> Hi,
>
> With the test-case included in the patch, we run into:
> ...
> (gdb) info types -q std::nullptr_t^M
> During symbol reading: unsupported tag: 'DW_TAG_unspecified_type'^M
> ^M
> File /usr/include/c++/7/x86_64-suse-linux/bits/c++config.h:^M
> 2198: typedef decltype(nullptr) std::nullptr_t;^M
> (gdb) FAIL: gdb.dwarf2/nullptr_t.exp: info types -q std::nullptr_t \
> without complaint
> ...
>
> Fix the complaint by handling DW_TAG_unspecified_type in new_symbol, and verify
> in the test-case using "maint print symbols" that the symbol exists.
>
> Tested on x86_64-linux, with gcc 7.5.0 and clang 13.0.
>
> Bug: https://sourceware.org/bugzilla/show_bug.cgi?id=17271
>
> Any comments?
>
Committed.
Thanks,
- Tom
> [gdb/symtab] Handle named DW_TAG_unspecified_type DIE
>
> ---
> gdb/dwarf2/read.c | 1 +
> gdb/testsuite/gdb.dwarf2/nullptr_t.cc | 29 +++++++++++++++++++++++++
> gdb/testsuite/gdb.dwarf2/nullptr_t.exp | 39 ++++++++++++++++++++++++++++++++++
> 3 files changed, 69 insertions(+)
>
> diff --git a/gdb/dwarf2/read.c b/gdb/dwarf2/read.c
> index 3ca441c4cae..a382d217def 100644
> --- a/gdb/dwarf2/read.c
> +++ b/gdb/dwarf2/read.c
> @@ -21063,6 +21063,7 @@ new_symbol (struct die_info *die, struct type *type, struct dwarf2_cu *cu,
> case DW_TAG_base_type:
> case DW_TAG_subrange_type:
> case DW_TAG_generic_subrange:
> + case DW_TAG_unspecified_type:
> sym->set_aclass_index (LOC_TYPEDEF);
> sym->set_domain (VAR_DOMAIN);
> list_to_add = cu->list_in_scope;
> diff --git a/gdb/testsuite/gdb.dwarf2/nullptr_t.cc b/gdb/testsuite/gdb.dwarf2/nullptr_t.cc
> new file mode 100644
> index 00000000000..85fe801e193
> --- /dev/null
> +++ b/gdb/testsuite/gdb.dwarf2/nullptr_t.cc
> @@ -0,0 +1,29 @@
> +/* This testcase is part of GDB, the GNU debugger.
> +
> + Copyright 2022 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 <cstddef>
> +
> +void
> +foo (std::nullptr_t)
> +{
> +}
> +
> +int
> +main (void)
> +{
> + foo (nullptr);
> +}
> diff --git a/gdb/testsuite/gdb.dwarf2/nullptr_t.exp b/gdb/testsuite/gdb.dwarf2/nullptr_t.exp
> new file mode 100644
> index 00000000000..c597c660a36
> --- /dev/null
> +++ b/gdb/testsuite/gdb.dwarf2/nullptr_t.exp
> @@ -0,0 +1,39 @@
> +# Copyright 2022 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_cplus_tests]} { continue }
> +
> +standard_testfile .cc
> +
> +if [prepare_for_testing "failed to prepare" $testfile $srcfile {debug c++}] {
> + return -1
> +}
> +
> +set cmd "info types -q std::nullptr_t"
> +
> +set re \
> + [multi_line \
> + "$cmd" \
> + "" \
> + "File .*:" \
> + "$decimal:\ttypedef decltype\\(nullptr\\) std::nullptr_t;"]
> +
> +with_complaints 5 {
> + gdb_test $cmd $re "$cmd without complaints"
> +}
> +
> +gdb_test "maint print symbols -source $srcfile" \
> + "typedef void decltype\\(nullptr\\); \r\n.*" \
> + "decltype(nullptr) symbol"
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