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Static initializer in shared libraries on Linux
- To: gcc <gcc at gcc dot gnu dot org>
- Subject: Static initializer in shared libraries on Linux
- From: Marcel Ruff <ruff at swand dot lake dot de>
- Date: Sun, 16 Sep 2001 15:08:28 +0200
Hi,
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