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authorJoseph Myers <joseph@codesourcery.com>2015-06-17 20:11:58 +0000
committerJoseph Myers <joseph@codesourcery.com>2015-06-17 20:11:58 +0000
commitd051b143f73189311faf9cd311cc53c6f6a145db (patch)
treeecb8deb80e164864cf069e12657de78ed1933b94 /nptl
parentbe7dc2b77e368daad6f81e272fc41f1b86166240 (diff)
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Fix sem_* tdelete, tfind, tsearch, twalk namespace (bug 18536).
The sem_* functions bring in references to tdelete, tfind, tsearch and twalk. But the t* functions are XSI-shaded, while sem_* aren't. This patch fixes this by using __t* instead, exporting those functions from libc at version GLIBC_PRIVATE (since sem_* are in libpthread) and using libc_hidden_* for the benefit of calls within libc. Tested for x86_64 and x86 (testsuite, and comparison of disassembly of installed stripped shared libraries). libpthread gets changes from PLT reordering; addresses in libc change because of PLT / dynamic symbol table changes. [BZ #18536] * misc/tsearch.c (__tsearch): Use libc_hidden_def. (__tfind): Likewise. (__tdelete): Likewise. (__twalk): Likewise. * misc/Versions (libc): Add __tdelete, __tfind, __tsearch and __twalk to GLIBC_PRIVATE. * include/search.h (__tsearch): Use libc_hidden_proto. (__tfind): Likewise. (__tdelete): Likewise. (__twalk): Likewise. * nptl/sem_close.c (sem_close): Call __twalk instead of twalk. Call __tdelete instead of tdelete. * nptl/sem_open.c (check_add_mapping): Call __tfind instead of tfind. Call __tsearch instead of tsearch. * sysdeps/sparc/sparc32/sem_open.c (check_add_mapping): Likewise. * conform/Makefile (test-xfail-POSIX/semaphore.h/linknamespace): Remove variable. (test-xfail-POSIX2008/semaphore.h/linknamespace): Likewise.
Diffstat (limited to 'nptl')
-rw-r--r--nptl/sem_close.c4
-rw-r--r--nptl/sem_open.c5
2 files changed, 5 insertions, 4 deletions
diff --git a/nptl/sem_close.c b/nptl/sem_close.c
index 3f1ccbe..7f1df14 100644
--- a/nptl/sem_close.c
+++ b/nptl/sem_close.c
@@ -51,7 +51,7 @@ sem_close (sem)
/* Locate the entry for the mapping the caller provided. */
rec = NULL;
the_sem = sem;
- twalk (__sem_mappings, walker);
+ __twalk (__sem_mappings, walker);
if (rec != NULL)
{
/* Check the reference counter. If it is going to be zero, free
@@ -59,7 +59,7 @@ sem_close (sem)
if (--rec->refcnt == 0)
{
/* Remove the record from the tree. */
- (void) tdelete (rec, &__sem_mappings, __sem_search);
+ (void) __tdelete (rec, &__sem_mappings, __sem_search);
result = munmap (rec->sem, sizeof (sem_t));
diff --git a/nptl/sem_open.c b/nptl/sem_open.c
index bfd2dea..ecd051a 100644
--- a/nptl/sem_open.c
+++ b/nptl/sem_open.c
@@ -79,7 +79,8 @@ check_add_mapping (const char *name, size_t namelen, int fd, sem_t *existing)
fake->dev = st.st_dev;
fake->ino = st.st_ino;
- struct inuse_sem **foundp = tfind (fake, &__sem_mappings, __sem_search);
+ struct inuse_sem **foundp = __tfind (fake, &__sem_mappings,
+ __sem_search);
if (foundp != NULL)
{
/* There is already a mapping. Use it. */
@@ -108,7 +109,7 @@ check_add_mapping (const char *name, size_t namelen, int fd, sem_t *existing)
/* Insert the new value. */
if (existing != MAP_FAILED
- && tsearch (newp, &__sem_mappings, __sem_search) != NULL)
+ && __tsearch (newp, &__sem_mappings, __sem_search) != NULL)
/* Successful. */
result = existing;
else