Implement the default constructor which causes the current program to be

opened as if it was a dynamic library so its symbols can be searched too.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18341 91177308-0d34-0410-b5e6-96231b3b80d8

lib/System/DynamicLibrary.cpp

@@ -28,6 +28,16 @@ using namespace sys;
 
 #ifdef HAVE_LT_DLOPEN
 
+DynamicLibrary::DynamicLibrary() : handle(0) {
+  if (0 != lt_dlinit())
+    throw std::string(lt_dlerror());
+
+  handle = lt_dlopen(0);
+
+  if (handle == 0)
+    throw std::string("Can't open program as dynamic library");
+}
+
 DynamicLibrary::DynamicLibrary(const char*filename) : handle(0) {
   if (0 != lt_dlinit())
     throw std::string(lt_dlerror());

lib/System/Unix/DynamicLibrary.cpp

@@ -16,8 +16,16 @@
 namespace llvm {
 using namespace sys;
 
+DynamicLibrary::DynamicLibrary() : handle(0) {
+#if defined (HAVE_DLOPEN)
+  if ((handle = dlopen(0, RTLD_NOW | RTLD_GLOBAL)) == 0)
+    throw std::string( dlerror() );
+#else
+  assert(!"Dynamic object linking not implemented for this platform");
+#endif
+}
 
-DynamicLibrary::DynamicLibrary(const char *filename) {
+DynamicLibrary::DynamicLibrary(const char *filename) : handle(0) {
 #if defined (HAVE_DLOPEN)
   if ((handle = dlopen (filename, RTLD_NOW | RTLD_GLOBAL)) == 0)
     throw std::string( dlerror() );

lib/System/Win32/DynamicLibrary.cpp

@@ -22,15 +22,21 @@ using namespace sys;
 //===          and must not be UNIX code
 //===----------------------------------------------------------------------===//
 
+DynamicLibrary::DynamicLibrary() : handle(0) {
+  handle = new HMODULE;
+  *((HMODULE*)handle) = GetModuleHandle(NULL);
+  
+  if (*((HMODULE*)handle) == 0) {
+    ThrowError("Can't GetModuleHandle: ");
+  }
+}
+
 DynamicLibrary::DynamicLibrary(const char*filename) : handle(0) {
   handle = new HMODULE;
   *((HMODULE*)handle) = LoadLibrary(filename);
 
   if (*((HMODULE*)handle) == 0) {
-    char Buffer[100];
+    ThrowError("Can't LoadLibrary: ");
-    // FIXME: This should use FormatMessage
-    sprintf(Buffer, "Windows error code %d\n", GetLastError());
-    throw std::string(Buffer);
   }
 }
 

lib/System/Win32/DynamicLibrary.inc

@@ -22,15 +22,21 @@ using namespace sys;
 //===          and must not be UNIX code
 //===----------------------------------------------------------------------===//
 
+DynamicLibrary::DynamicLibrary() : handle(0) {
+  handle = new HMODULE;
+  *((HMODULE*)handle) = GetModuleHandle(NULL);
+  
+  if (*((HMODULE*)handle) == 0) {
+    ThrowError("Can't GetModuleHandle: ");
+  }
+}
+
 DynamicLibrary::DynamicLibrary(const char*filename) : handle(0) {
   handle = new HMODULE;
   *((HMODULE*)handle) = LoadLibrary(filename);
 
   if (*((HMODULE*)handle) == 0) {
-    char Buffer[100];
+    ThrowError("Can't LoadLibrary: ");
-    // FIXME: This should use FormatMessage
-    sprintf(Buffer, "Windows error code %d\n", GetLastError());
-    throw std::string(Buffer);
   }
 }