search for: lt_dlhandl

...'s lib/System package. That package implements > this using the libtool "ltdl" library, which presumably gets this > right in an operating system correct way. Presumably? http://www.gnu.org/software/libtool/manual.html#index-lt_005fdlsym-167 says: Function: lt_ptr lt_dlsym(lt_dlhandle handle, const char *name) Return the address in the module handle, where the symbol given by the null-terminated string name is loaded. If the symbol cannot be found, NULL is returned. And lt_dlerror() also appears to have the same behaviour as its non-lt_ counterpart, s...

...implements > > this using the libtool "ltdl" library, which presumably gets this > > right in an operating system correct way. > > Presumably? > http://www.gnu.org/software/libtool/manual.html#index-lt_005fdlsym-167 > says: > > Function: lt_ptr lt_dlsym(lt_dlhandle handle, const char *name) > > Return the address in the module handle, where the symbol given > by the null-terminated string name is loaded. If the symbol > cannot be found, NULL is returned. > > And lt_dlerror() also appears to have the same behaviour...

Hi Chris, > Once you have that, you are hitting another problem. Specifically, > the JIT::getPointerToNamedFunction method in > lib/ExecutionEngine/JIT/Intercept.cpp just does a dlsym on missing > symbols. If dlsym returns null, you get the error message. > > The problem here is that .objc_class_name_* are special symbols that > are used by the objc linker support and they

On Fri, 20 Jul 2007, Ralph Corderoy wrote: > I could be missing something, but shouldn't the use of dlsym() be > The authors of dlsym() realised the return value was overloaded AFAICS. Yep, patches welcome :) -Chris -- http://nondot.org/sabre/ http://llvm.org/

Hi Ralph, On Fri, 2007-07-20 at 10:38 +0100, Ralph Corderoy wrote: > Hi Chris, > I could be missing something, but shouldn't the use of dlsym() be > > char *err; > void *p; > > if ((err = dlerror())) { > error("earlier undetected dlerror: %s\n", err); > } > p = dlsym(handle, sym); > if ((err = dlerror())) { >

...================== --- DynamicLibrary.cpp (revision 40112) +++ DynamicLibrary.cpp (working copy) @@ -130,11 +130,19 @@ if (I != g_symbols.end()) return I->second; + // Clear the error status of the ltdl library + lt_dlerror(); + // Now search the libraries. for (std::vector<lt_dlhandle>::iterator I = OpenedHandles.begin(), E = OpenedHandles.end(); I != E; ++I) { lt_ptr ptr = lt_dlsym(*I, symbolName); - if (ptr) + + // Get the error for the lt_dlsym call. If there was no error and the result + // from lt_dlsym was 0 then 0 is the address of the symbol, no...