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| author | Tom Tromey <tom@tromey.com> | 2022-08-02 12:01:01 -0600 |
|---|---|---|
| committer | Tom Tromey <tom@tromey.com> | 2022-08-03 13:26:58 -0600 |
| commit | 88c4cce8d28e6be486cb25fbbccf2b42e40da45b (patch) | |
| tree | df842da69d935024ed54f49f827f4fc1cd634b6d /gdb/objfiles.h | |
| parent | 075e4d6d95681bfbf53e849c2802a75d1d4cbdca (diff) | |
| download | gdb-88c4cce8d28e6be486cb25fbbccf2b42e40da45b.zip gdb-88c4cce8d28e6be486cb25fbbccf2b42e40da45b.tar.gz gdb-88c4cce8d28e6be486cb25fbbccf2b42e40da45b.tar.bz2 | |
Use unique_ptr to destroy per-bfd object
In some cases, the objfile owns the per-bfd object. This is yet
another object that can sometimes be destroyed before the registry is
destroyed, possibly reslting in a use-after-free. Also, I noticed
that the condition for deleting the object is not the same as the
condition used to create it -- so it could possibly result in a memory
leak in some situations. This patch fixes the problem by introducing
a new unique_ptr that holds this object when necessary.
Diffstat (limited to 'gdb/objfiles.h')
| -rw-r--r-- | gdb/objfiles.h | 9 |
1 files changed, 7 insertions, 2 deletions
diff --git a/gdb/objfiles.h b/gdb/objfiles.h index ac45fa3..16dab0d 100644 --- a/gdb/objfiles.h +++ b/gdb/objfiles.h @@ -653,11 +653,16 @@ public: gdb_bfd_ref_ptr obfd; - /* The per-BFD data. Note that this is treated specially if OBFD - is NULL. */ + /* The per-BFD data. */ struct objfile_per_bfd_storage *per_bfd = nullptr; + /* In some cases, the per_bfd object is owned by this objfile and + not by the BFD itself. In this situation, this holds the owning + pointer. */ + + std::unique_ptr<objfile_per_bfd_storage> per_bfd_storage; + /* The modification timestamp of the object file, as of the last time we read its symbols. */ |