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[pushed] Add virtual destructor to selftest
- From: Simon Marchi <simon dot marchi at ericsson dot com>
- To: <gdb-patches at sourceware dot org>
- Cc: Simon Marchi <simon dot marchi at ericsson dot com>
- Date: Thu, 7 Dec 2017 11:49:44 -0500
- Subject: [pushed] Add virtual destructor to selftest
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Clang 6 shows this warning
In file included from /home/emaisin/src/binutils-gdb/gdb/common/selftest.c:19:
In file included from /home/emaisin/src/binutils-gdb/gdb/common/common-defs.h:92:
In file included from /home/emaisin/src/binutils-gdb/gdb/common/gdb_unique_ptr.h:23:
In file included from /usr/bin/../lib/gcc/x86_64-linux-gnu/5.4.0/../../../../include/c++/5.4.0/memory:81:
/usr/bin/../lib/gcc/x86_64-linux-gnu/5.4.0/../../../../include/c++/5.4.0/bits/unique_ptr.h:76:2: error: delete called on 'selftests::selftest' that is abstract but has non-virtual destructor [-Werror,-Wdelete-non-virtual-dtor]
delete __ptr;
^
/usr/bin/../lib/gcc/x86_64-linux-gnu/5.4.0/../../../../include/c++/5.4.0/bits/unique_ptr.h:236:4: note: in instantiation of member function 'std::default_delete<selftests::selftest>::operator()' requested here
get_deleter()(__ptr);
^
/home/emaisin/src/binutils-gdb/gdb/common/selftest.c:57:17: note: in instantiation of member function 'std::unique_ptr<selftests::selftest, std::default_delete<selftests::selftest> >::~unique_ptr' requested here
tests[name] = std::unique_ptr<selftest> (test);
^
The error is legitimate, we (the unique_ptr) are deleting selftest
objects through the base pointer, so technically the destructor should
be virtual, so that the destructor of the subclass is invoked.
gdb/ChangeLog:
* common/selftest.h (struct selftest): Add virtual destructor.
---
gdb/ChangeLog | 4 ++++
gdb/common/selftest.h | 1 +
2 files changed, 5 insertions(+)
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 9ba0254..54aec7f 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,7 @@
+2017-12-07 Simon Marchi <simon.marchi@ericsson.com>
+
+ * common/selftest.h (struct selftest): Add virtual destructor.
+
2017-12-07 Phil Muldoon <pmuldoon@redhat.com>
* python/py-breakpoint.c (bppy_init): Use string_to_event_location
diff --git a/gdb/common/selftest.h b/gdb/common/selftest.h
index 35a344f..7e91bd4 100644
--- a/gdb/common/selftest.h
+++ b/gdb/common/selftest.h
@@ -31,6 +31,7 @@ namespace selftests
struct selftest
{
+ virtual ~selftest () = default;
virtual void operator() () const = 0;
};
--
2.7.4