[libvirt] [PATCH] Avoid crash in shunloadtest

[Daniel P. Berrange]

From: "Daniel P. Berrange" <berrange at redhat.com>

For unknown reasons, the shunloadtest will crash on Fedora 16
inside dlopen()

 (gdb) bt
 #0  0x00000000000050e6 in ?? ()
 #1  0x00007ff61a77b9d5 in floor () from /lib64/libm.so.6
 #2  0x00007ff61e522963 in _dl_relocate_object () from /lib64/ld-linux-x86-64.so.2
 #3  0x00007ff61e5297e6 in dl_open_worker () from /lib64/ld-linux-x86-64.so.2
 #4  0x00007ff61e525006 in _dl_catch_error () from /lib64/ld-linux-x86-64.so.2
 #5  0x00007ff61e52917a in _dl_open () from /lib64/ld-linux-x86-64.so.2
 #6  0x00007ff61e0f6f26 in dlopen_doit () from /lib64/libdl.so.2
 #7  0x00007ff61e525006 in _dl_catch_error () from /lib64/ld-linux-x86-64.so.2
 #8  0x00007ff61e0f752f in _dlerror_run () from /lib64/libdl.so.2
 #9  0x00007ff61e0f6fc1 in dlopen@@GLIBC_2.2.5 () from /lib64/libdl.so.2
 #10 0x0000000000400a15 in main (argc=<optimized out>, argv=<optimized out>) at shunloadtest.c:105

Changing from RTLD_NOW to RTLD_LAZY avoids this problem,
but quite possibly does not fix the root cause.

* shunloadtest.c: s/NOW/LAZY/
---
 tests/shunloadtest.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/tests/shunloadtest.c b/tests/shunloadtest.c
index 2cdb8b8..ab6e56f 100644
--- a/tests/shunloadtest.c
+++ b/tests/shunloadtest.c
@@ -102,7 +102,7 @@ int main(int argc ATTRIBUTE_UNUSED, char **argv)
     fprintf(stderr, "      .%*s 1   ", 39, "");
     signal(SIGSEGV, sigHandler);
 
-    if (!(lib = dlopen("./.libs/libshunload.so", RTLD_NOW))) {
+    if (!(lib = dlopen("./.libs/libshunload.so", RTLD_LAZY))) {
         fprintf(stderr, "Cannot load ./.libs/libshunload.so %s\n", dlerror());
         return 1;
     }
-- 
1.7.7.3