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authorJunling Zheng <zhengjunling@huawei.com>2015-07-20 13:33:57 +0000
committerWaldemar Brodkorb <wbx@uclibc-ng.org>2015-08-27 06:10:11 +0200
commitd63ef2748f18c0f20ea866cb197fa3068f180ec7 (patch)
treef3245c2a564056213e7257cd2b299f5a12f6758a /libpthread
parentbb1be3426bfe3f98e00ba5d172bd779df084845e (diff)
nptl_db/db_info: fix the incorrect initial size for dtvp
When debugging a program on ARMv7 with thread-local storage declared using "__thread", attempting to print a thread-local variable will result in the following message: Cannot find thread-local storage for Thread <snip> (LWP <snip>), executable file /tmp/tls: capability not available This can be traced back to uclibc libpthread/nptl_db/td_thr_tls_get_addr.c which gdb uses to look up the address of the TLS. The function returns TD_NOCAPAB due to a mismatch in size between the DTV pointer and the size recorded in the db description. The problem lies in libpthread/nptl_db/db_info.c which initializes the db with the sizeof the union dtv. Instead it should be the sizeof a pointer to union dtv. Fixed the initial size for dtvp to sizeof a pointer, instead of sizeof the union. Refer to: http://sourceware.org/ml/libc-alpha/2006-10/msg00088.html https://sourceware.org/git/?p=glibc.git;a=commitdiff;h=416b630981788c1f08e746e19765aa0e5c2a1360 Signed-off-by: Junling Zheng <zhengjunling@huawei.com>
Diffstat (limited to 'libpthread')
-rw-r--r--libpthread/nptl_db/db_info.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/libpthread/nptl_db/db_info.c b/libpthread/nptl_db/db_info.c
index a57a053dd..159a027da 100644
--- a/libpthread/nptl_db/db_info.c
+++ b/libpthread/nptl_db/db_info.c
@@ -60,7 +60,7 @@ extern bool __nptl_initial_report_events;
i.e. at the very end of the area covered by TLS_PRE_TCB_SIZE. */
DESC (_thread_db_pthread_dtvp,
TLS_PRE_TCB_SIZE + offsetof (tcbhead_t, dtv)
- - (TLS_TCB_SIZE == 0 ? sizeof (tcbhead_t) : 0), union dtv)
+ - (TLS_TCB_SIZE == 0 ? sizeof (tcbhead_t) : 0), union dtv *)
#endif