Re: dlsym() and C++

[Pierre Phaneuf <pp@ludusdesign.com>]

Pierre Phaneuf wrote:

> coredumper1.patch is one way to fix it, that was found by simply using
> coredumper2.patch shows how to do it properly (it has to be applied

Oops! By the way, here's the patches!

-- 
Pierre Phaneuf
Ludus Design, http://ludusdesign.com/
diff -ruN coredumper.orig/coredumper.cpp coredumper/coredumper.cpp
--- coredumper.orig/coredumper.cpp	Tue Dec 29 09:21:51 1998
+++ coredumper/coredumper.cpp	Sun Jan 17 19:34:17 1999
@@ -3,15 +3,17 @@
 #include <dlfcn.h>
 #include <iostream.h>
 
+typedef void (*tsymbol) ();
+
 void main()
 {
   void *handle = dlopen("./libcore.so", RTLD_NOW | RTLD_GLOBAL);
   if (handle == NULL) cout << "DAMN" << endl;
 
-  void (*symbol)();
+  tsymbol symbol;
 
-  symbol  = dlsym(handle, "ugga");
-  (*symbol)();
+  symbol  = (tsymbol)dlsym(handle, "ugga__Fv");
+  symbol();
 
   if (handle != NULL) dlclose(handle);
 }
diff -ruN coredumper.orig/makeit coredumper/makeit
--- coredumper.orig/makeit	Tue Dec 29 09:21:51 1998
+++ coredumper/makeit	Sun Jan 17 19:44:57 1999
@@ -7,7 +7,7 @@
 
 
 echo "C style corelib comp"
-gcc -shared corelib.c -o libcore1.so  -export-dynamic -x
+gcc -shared corelib.c -o libcore1.so  -export-dynamic -Xlinker -x
 
 echo "C style core dumper comp"
 gcc coredumper.c -o coredumper1 -ldl  -export-dynamic
diff -ruN coredumper.orig/coredumper.cpp coredumper/coredumper.cpp
--- coredumper.orig/coredumper.cpp	Sun Jan 17 19:34:17 1999
+++ coredumper/coredumper.cpp	Sun Jan 17 19:46:34 1999
@@ -12,7 +12,7 @@
 
   tsymbol symbol;
 
-  symbol  = (tsymbol)dlsym(handle, "ugga__Fv");
+  symbol  = (tsymbol)dlsym(handle, "ugga");
   symbol();
 
   if (handle != NULL) dlclose(handle);
diff -ruN coredumper.orig/corelib.cpp coredumper/corelib.cpp
--- coredumper.orig/corelib.cpp	Tue Dec 29 09:21:51 1998
+++ coredumper/corelib.cpp	Sun Jan 17 19:56:50 1999
@@ -4,6 +4,8 @@
 void ugga7(int);
 void ugga7(int,int);
 
+extern "C" void ugga();
+
 //extern "C"
 //{
 	void ugga()