From: Marcel Ruff <ruff@swand.lake.de>
To: gcc <gcc@gcc.gnu.org>
Subject: Static initializer in shared libraries on Linux #2
Date: Sun, 16 Sep 2001 06:18:00 -0000 [thread overview]
Message-ID: <3BA4A6A2.5040003@swand.lake.de> (raw)
Hi,
<more>
I forgot to mention that if i compile
xy.C to an executable, it runs fine,
but if xy.C is compiled to a shared library,
and invoked thru a java virtual machine ('no main()')
it fails as noted below
</more>
i have two .so libs, and get a sig 11 when
accessing a static string variable,
accessing a static variable of type char*
works fine:
InitTest.H
-----------
class InitTest
{
public: static char * charName;
public: static string stringName;
};
#if EXTERN_MAIN
char * InitTest::charName = "Hello charP";
string InitTest::stringName = string("Hello string");
# endif
-----------
compile this into libInitTest.so
xy.C
------------
#define EXTERN_MAIN 1
....
// Runs fine:
cout << "C++: the charName=" << InitTest::charName << endl;
// Sig 11 - core dump:
cout << "C++: the stringName=" << InitTest::stringName << endl;
...
------------
compile this into xy.so
xy.C is run by a Java JVM using JNI.
Looking into the .so libs:
---------------------
nm -o *.so | grep charName
libxy.so:00028910 D _8InitTest.charName
libxy.so:0001bf60 t _GLOBAL_.D._8InitTest.charName
libxy.so:0001bf30 t _GLOBAL_.I._8InitTest.charName
nm -o *.so | grep stringName
libxy.so:0002d4c8 B _8InitTest.stringName
--------------------
The "string" class is never initialized whereas
the char* acts as expected!
Why?
Why is there no entry in libInitTest.so?
What do i have to change to get this running?
thanks for any help,
Marcel
--
Marcel Ruff
mailto:ruff@swand.lake.de
http://www.lake.de/home/lake/swand/
http://www.xmlBlaster.org
next reply other threads:[~2001-09-16 6:18 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-09-16 6:18 Marcel Ruff [this message]
2001-09-16 9:13 ` H . J . Lu
2001-09-17 1:00 ` Marcel Ruff
2001-09-17 8:57 ` H . J . Lu
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