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| author | Carlos O'Donell <carlos@systemhalted.org> | 2015-01-21 01:51:10 -0500 |
|---|---|---|
| committer | Carlos O'Donell <carlos@systemhalted.org> | 2015-01-21 01:51:10 -0500 |
| commit | ccdb048df457d581f6ac7ede8b0c7a593a891dfa (patch) | |
| tree | 9f87447c45093fb2ded95c982e68c9e6e886129c /sysdeps/generic/ldsodefs.h | |
| parent | 042e1521c794a945edc43b5bfa7e69ad70420524 (diff) | |
| download | glibc-ccdb048df457d581f6ac7ede8b0c7a593a891dfa.zip glibc-ccdb048df457d581f6ac7ede8b0c7a593a891dfa.tar.gz glibc-ccdb048df457d581f6ac7ede8b0c7a593a891dfa.tar.bz2 | |
Fix recursive dlopen.
The ability to recursively call dlopen is useful for malloc
implementations that wish to load other dynamic modules that
implement reentrant/AS-safe functions to use in their own
implementation.
Given that a user malloc implementation may be called by an
ongoing dlopen to allocate memory the user malloc
implementation interrupts dlopen and if it calls dlopen again
that's a reentrant call.
This patch fixes the issues with the ld.so.cache mapping
and the _r_debug assertion which prevent this from working
as expected.
See:
https://sourceware.org/ml/libc-alpha/2014-12/msg00446.html
Diffstat (limited to 'sysdeps/generic/ldsodefs.h')
| -rw-r--r-- | sysdeps/generic/ldsodefs.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sysdeps/generic/ldsodefs.h b/sysdeps/generic/ldsodefs.h index 96dec1f..d738988 100644 --- a/sysdeps/generic/ldsodefs.h +++ b/sysdeps/generic/ldsodefs.h @@ -905,8 +905,8 @@ extern const struct r_strlenpair *_dl_important_hwcaps (const char *platform, internal_function; /* Look up NAME in ld.so.cache and return the file name stored there, - or null if none is found. */ -extern const char *_dl_load_cache_lookup (const char *name) + or null if none is found. Caller must free returned string. */ +extern char *_dl_load_cache_lookup (const char *name) internal_function; /* If the system does not support MAP_COPY we cannot leave the file open |