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| author | Tom Tromey <tom@tromey.com> | 2016-08-03 08:27:56 -0600 |
|---|---|---|
| committer | Tom Tromey <tom@tromey.com> | 2016-08-03 09:04:08 -0600 |
| commit | d10153cfc6cb319a75ceb3e3d34ac30efa17e518 (patch) | |
| tree | d2336732b4fa9c37f5d09253c793764efc7c438e /gdb/stack.c | |
| parent | 8d2a0a14e53945eb260c08752654bd03a240ecf7 (diff) | |
| download | gdb-d10153cfc6cb319a75ceb3e3d34ac30efa17e518.zip gdb-d10153cfc6cb319a75ceb3e3d34ac30efa17e518.tar.gz gdb-d10153cfc6cb319a75ceb3e3d34ac30efa17e518.tar.bz2 | |
Avoid potential memory leak in find_frame_funname
The PR 18565 thread pointed out that, if cp_remove_params can throw
(we aren't quite sure), then find_frame_funname could leak some
memory. This patch avoids any potential issue by rearranging some
code in find_frame_funname.
Built and regtested on x86-64 Fedora 24.
2016-08-03 Tom Tromey <tom@tromey.com>
* stack.c (find_frame_funname): Avoid any possible leak in case
cp_remove_params can throw.
Diffstat (limited to 'gdb/stack.c')
| -rw-r--r-- | gdb/stack.c | 16 |
1 files changed, 10 insertions, 6 deletions
diff --git a/gdb/stack.c b/gdb/stack.c index b9e74df..e890949 100644 --- a/gdb/stack.c +++ b/gdb/stack.c @@ -1101,7 +1101,8 @@ find_frame_funname (struct frame_info *frame, char **funname, } else { - *funname = xstrdup (SYMBOL_PRINT_NAME (func)); + const char *print_name = SYMBOL_PRINT_NAME (func); + *funlang = SYMBOL_LANGUAGE (func); if (funcp) *funcp = func; @@ -1112,14 +1113,17 @@ find_frame_funname (struct frame_info *frame, char **funname, stored in the symbol table, but we stored a version with DMGL_PARAMS turned on, and here we don't want to display parameters. So remove the parameters. */ - char *func_only = cp_remove_params (*funname); + char *func_only = cp_remove_params (print_name); if (func_only) - { - xfree (*funname); - *funname = func_only; - } + *funname = func_only; } + + /* If we didn't hit the C++ case above, set *funname here. + This approach is taken to avoid having to install a + cleanup in case cp_remove_params can throw. */ + if (*funname == NULL) + *funname = xstrdup (print_name); } } else |