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[Bug libc/14898] New: Unable to create small static TLS block in shared library
- From: "bramesh.dev at gmail dot com" <sourceware-bugzilla at sourceware dot org>
- To: glibc-bugs at sources dot redhat dot com
- Date: Fri, 30 Nov 2012 17:12:00 +0000
- Subject: [Bug libc/14898] New: Unable to create small static TLS block in shared library
- Auto-submitted: auto-generated
http://sourceware.org/bugzilla/show_bug.cgi?id=14898
Bug #: 14898
Summary: Unable to create small static TLS block in shared
library
Product: glibc
Version: 2.15
Status: NEW
Severity: normal
Priority: P2
Component: libc
AssignedTo: unassigned@sourceware.org
ReportedBy: bramesh.dev@gmail.com
CC: drepper.fsp@gmail.com
Classification: Unclassified
Created attachment 6766
--> http://sourceware.org/bugzilla/attachment.cgi?id=6766
tarball to reproduce bug
If shared library declease a single TLS global variable of size 1 (one) byte,
and this TLS variable is accessed by the binary linking against it the shared
library doesnt get loaded because there is an error creating the static TLS
block. The attached test case shows both the failed and expected behavior.
Untar the files from the tar ball. To reproduce the bug please compile the
shared library as follows:
libfoo:
gcc -g -Wall -Wextra -fPIC -pthread -shared -DBUG -o libfoo.so foo.c
test:
gcc -g -Wall -Wextra -DBUG -o test test.c -Wl,-rpath . -L . -lfoo
$ ./test
./test: error while loading shared libraries: ./libfoo.so: cannot allocate
memory in static TLS block
To get the expected behavior recompile the tests as follows
libfoo:
gcc -g -Wall -Wextra -fPIC -pthread -shared -o libfoo.so foo.c
test:
gcc -g -Wall -Wextra -o test test.c -Wl,-rpath . -L . -lfoo
$ ./test
foo: 1
address of foo: 0x7f3d359c56fe
The behavior is same if the library is compiled without -pthread. I have tested
this bug in my system running Ubuntu precise using eglibc-2.15.
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