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| author | Philippe Waroquiers <philippe.waroquiers@skynet.be> | 2022-11-27 19:20:58 +0100 |
|---|---|---|
| committer | Philippe Waroquiers <philippe.waroquiers@skynet.be> | 2022-11-27 21:08:24 +0100 |
| commit | c801f8f138c03cde994db597d11953c21ed892de (patch) | |
| tree | 3406d68b0b6f1a01f997c6b7e4cef60d30099410 /gdbsupport | |
| parent | 30220b46d4cc34f4882525eb92b40725637cbba7 (diff) | |
| download | gdb-c801f8f138c03cde994db597d11953c21ed892de.zip gdb-c801f8f138c03cde994db597d11953c21ed892de.tar.gz gdb-c801f8f138c03cde994db597d11953c21ed892de.tar.bz2 | |
fix leak in gdb_environ
valgrind reports a leak when assigning a gdb_environ to another gdb_environ.
The memory allocated for the target gdb_environ env variables is not released.
The gdb_environ selftest reproduces the leak (see below).
Fix the leak by clearing the target gdb_environ before std::move-ing the
members.
Tested natively and re-running all tests under valgrind.
==3261873== 4,842 bytes in 69 blocks are definitely lost in loss record 6,772 of 6,839
==3261873== at 0x483979B: malloc (vg_replace_malloc.c:393)
==3261873== by 0x25A454: xmalloc (alloc.c:57)
==3261873== by 0x7D1E4E: xstrdup (xstrdup.c:34)
==3261873== by 0x7E2A51: gdb_environ::from_host_environ() (environ.cc:56)
==3261873== by 0x66F1C8: test_reinit_from_host_environ (environ-selftests.c:78)
==3261873== by 0x66F1C8: selftests::gdb_environ_tests::run_tests() (environ-selftests.c:285)
==3261873== by 0x7EFC43: operator() (std_function.h:622)
=
Approved-By: Simon Marchi <simon.marchi@efficios.com>
Diffstat (limited to 'gdbsupport')
| -rw-r--r-- | gdbsupport/environ.cc | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/gdbsupport/environ.cc b/gdbsupport/environ.cc index f5f6b38..2d8e3ea 100644 --- a/gdbsupport/environ.cc +++ b/gdbsupport/environ.cc @@ -29,6 +29,8 @@ gdb_environ::operator= (gdb_environ &&e) if (&e == this) return *this; + this->clear (); + m_environ_vector = std::move (e.m_environ_vector); m_user_set_env = std::move (e.m_user_set_env); m_user_unset_env = std::move (e.m_user_unset_env); |