diff options
| author | Ulf Hermann <[email protected]> | 2017-04-06 19:11:34 +0200 |
|---|---|---|
| committer | Ulf Hermann <[email protected]> | 2017-05-08 09:45:46 +0000 |
| commit | 9f59b055f56ccebaa3d272d153c74fb889958a8a (patch) | |
| tree | 8407114b4fc6f03dccfda236afb0d6e44ab86302 | |
| parent | e5cde7378c246a32d7dbc3bff8db15befad8b1a9 (diff) | |
Adapt debug info fstat check for windows
On windows the resulting ino and dev entries are always 0, so the file
would always be discarded. We apply a heuristic instead: If the ctime,
mtime, mode and size of the two files are all equal then we consider
them to be the same. It's exceedingly unlikely to produce two different
files for which that holds by chance.
Change-Id: I491c95ab8b90fc3c1b786cceae242e142b5a491f
Reviewed-by: Christian Kandeler <[email protected]>
| -rw-r--r-- | libdwfl/ChangeLog | 5 | ||||
| -rw-r--r-- | libdwfl/find-debuginfo.c | 9 |
2 files changed, 14 insertions, 0 deletions
diff --git a/libdwfl/ChangeLog b/libdwfl/ChangeLog index ee550d02..517ba216 100644 --- a/libdwfl/ChangeLog +++ b/libdwfl/ChangeLog @@ -1,5 +1,10 @@ 2017-05-04 Ulf Hermann <[email protected]> + * find-debuginfo.c: On windows, check various extra parameters of + struct stat to determine if two files are the same. + +2017-05-04 Ulf Hermann <[email protected]> + * dwfl_build_id_find_elf.c: Don't assume unix file system conventions. * find-debuginfo.c: Likewise. * linux-kernel-modules.c: Likewise. diff --git a/libdwfl/find-debuginfo.c b/libdwfl/find-debuginfo.c index ac568d08..3a65eda0 100644 --- a/libdwfl/find-debuginfo.c +++ b/libdwfl/find-debuginfo.c @@ -63,10 +63,19 @@ try_open (const struct stat *main_stat, if (fd < 0) free (fname); else if (fstat (fd, &st) == 0 +#if defined _WIN32 || defined __WIN32__ + /* On windows, st_ino and st_dev are not unique, so we apply a heuristic */ + && st.st_size == main_stat->st_size + && st.st_mode == main_stat->st_mode + && st.st_mtime == main_stat->st_mtime + && st.st_ctime == main_stat->st_ctime +#endif && st.st_ino == main_stat->st_ino && st.st_dev == main_stat->st_dev) { /* This is the main file by another name. Don't look at it again. */ + /* This doesn't happen on windows as windows doesn't have proper links. However, on windows + st_ino and st_dev is always 0. */ free (fname); close (fd); errno = ENOENT; |