X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/d8e342b79ef4e77130afc92b6121fd691cb289bd..43af39c8630f8278bf9db78547d43304a4b4d5f4:/src/unix/dlunix.cpp

diff --git a/src/unix/dlunix.cpp b/src/unix/dlunix.cpp
index fcad9a5671..efe3f7e2ef 100644
--- a/src/unix/dlunix.cpp
+++ b/src/unix/dlunix.cpp
@@ -33,10 +33,26 @@
     #include "wx/log.h"
 #endif
 
-#if defined(__DARWIN__)
+// only Mac OS X 10.3+ has dlfcn.h, and it is simpler to always provide our own
+// wrappers using the native functions instead of doing checks for OS version
+#ifndef __DARWIN__
     #include <dlfcn.h>
 #endif
 
+// if some flags are not supported, just ignore them
+#ifndef RTLD_LAZY
+    #define RTLD_LAZY 0
+#endif
+
+#ifndef RTLD_NOW
+    #define RTLD_NOW 0
+#endif
+
+#ifndef RTLD_GLOBAL
+    #define RTLD_GLOBAL 0
+#endif
+
+
 #if defined(HAVE_DLOPEN) || defined(__DARWIN__)
     #define USE_POSIX_DL_FUNCS
 #elif !defined(HAVE_SHL_LOAD)
@@ -82,29 +98,6 @@
 
 static char dl_last_error[1024];
 
-static
-void TranslateError(const char *path, int number)
-{
-    unsigned int index;
-    static char *OFIErrorStrings[] =
-    {
-        "%s(%d): Object Image Load Failure\n",
-        "%s(%d): Object Image Load Success\n",
-        "%s(%d): Not an recognisable object file\n",
-        "%s(%d): No valid architecture\n",
-        "%s(%d): Object image has an invalid format\n",
-        "%s(%d): Invalid access (permissions?)\n",
-        "%s(%d): Unknown error code from NSCreateObjectFileImageFromFile\n",
-    };
-#define NUM_OFI_ERRORS (sizeof(OFIErrorStrings) / sizeof(OFIErrorStrings[0]))
-
-    index = number;
-    if (index > NUM_OFI_ERRORS - 1) {
-        index = NUM_OFI_ERRORS - 1;
-    }
-    sprintf(dl_last_error, OFIErrorStrings[index], path, number);
-}
-
 const char *dlerror()
 {
     return dl_last_error;
@@ -115,10 +108,29 @@ void *dlopen(const char *path, int WXUNUSED(mode) /* mode is ignored */)
     NSObjectFileImage ofile;
     NSModule handle = NULL;
 
-    int dyld_result = NSCreateObjectFileImageFromFile(path, &ofile);
+    unsigned dyld_result = NSCreateObjectFileImageFromFile(path, &ofile);
     if ( dyld_result != NSObjectFileImageSuccess )
     {
         handle = NULL;
+
+        static const char *errorStrings[] =
+        {
+            "%d: Object Image Load Failure",
+            "%d: Object Image Load Success",
+            "%d: Not an recognisable object file",
+            "%d: No valid architecture",
+            "%d: Object image has an invalid format",
+            "%d: Invalid access (permissions?)",
+            "%d: Unknown error code from NSCreateObjectFileImageFromFile"
+        };
+
+        const int index = dyld_result < WXSIZEOF(errorStrings)
+                            ? dyld_result
+                            : WXSIZEOF(errorStrings) - 1;
+
+        // this call to sprintf() is safe as strings above are fixed at
+        // compile-time and are shorter than WXSIZEOF(dl_last_error)
+        sprintf(dl_last_error, errorStrings[index], dyld_result);
     }
     else
     {
@@ -129,17 +141,27 @@ void *dlopen(const char *path, int WXUNUSED(mode) /* mode is ignored */)
                     NSLINKMODULE_OPTION_BINDNOW |
                     NSLINKMODULE_OPTION_RETURN_ON_ERROR
                  );
+
+        if ( !handle )
+        {
+            NSLinkEditErrors err;
+            int code;
+            const char *filename;
+            const char *errmsg;
+
+            NSLinkEditError(&err, &code, &filename, &errmsg);
+            strncpy(dl_last_error, errmsg, WXSIZEOF(dl_last_error)-1);
+            dl_last_error[WXSIZEOF(dl_last_error)-1] = '\0';
+        }
     }
 
-    if ( !handle )
-        TranslateError(path, dyld_result);
 
     return handle;
 }
 
 int dlclose(void *handle)
 {
-    NSUnLinkModule( handle, NSUNLINKMODULE_OPTION_NONE);
+    NSUnLinkModule((NSModule)handle, NSUNLINKMODULE_OPTION_NONE);
     return 0;
 }
 
@@ -153,7 +175,7 @@ void *dlsym(void *handle, const char *symbol)
     p[0] = '_';
     strcpy(p + 1, symbol);
 
-    NSSymbol nsSymbol = NSLookupSymbolInModule( handle, p );
+    NSSymbol nsSymbol = NSLookupSymbolInModule((NSModule)handle, p );
     return nsSymbol ? NSAddressOfSymbol(nsSymbol) : NULL;
 }
 
@@ -175,30 +197,17 @@ wxDllType wxDynamicLibrary::GetProgramHandle()
 /* static */
 wxDllType wxDynamicLibrary::RawLoad(const wxString& libname, int flags)
 {
-    wxASSERT_MSG( (flags & wxDL_NOW) == 0,
+    wxASSERT_MSG( !(flags & wxDL_NOW) || !(flags & wxDL_LAZY),
                   _T("wxDL_LAZY and wxDL_NOW are mutually exclusive.") );
 
 #ifdef USE_POSIX_DL_FUNCS
-    int rtldFlags = 0;
+    // we need to use either RTLD_NOW or RTLD_LAZY because if we call dlopen()
+    // with flags == 0 recent versions of glibc just fail the call, so use
+    // RTLD_NOW even if wxDL_NOW was not specified
+    int rtldFlags = flags & wxDL_LAZY ? RTLD_LAZY : RTLD_NOW;
 
-#ifdef RTLD_LAZY
-    if ( flags & wxDL_LAZY )
-    {
-        rtldFlags |= RTLD_LAZY;
-    }
-#endif
-#ifdef RTLD_NOW
-    if ( flags & wxDL_NOW )
-    {
-        rtldFlags |= RTLD_NOW;
-    }
-#endif
-#ifdef RTLD_GLOBAL
     if ( flags & wxDL_GLOBAL )
-    {
         rtldFlags |= RTLD_GLOBAL;
-    }
-#endif
 
     return dlopen(libname.fn_str(), rtldFlags);
 #else // !USE_POSIX_DL_FUNCS
@@ -285,13 +294,13 @@ class wxDynamicLibraryDetailsCreator
 public:
     // create a new wxDynamicLibraryDetails from the given data
     static wxDynamicLibraryDetails *
-    New(unsigned long start, unsigned long end, const wxString& path)
+    New(void *start, void *end, const wxString& path)
     {
         wxDynamicLibraryDetails *details = new wxDynamicLibraryDetails;
         details->m_path = path;
         details->m_name = path.AfterLast(_T('/'));
-        details->m_address = wx_reinterpret_cast(void *, start);
-        details->m_length = end - start;
+        details->m_address = start;
+        details->m_length = (char *)end - (char *)start;
 
         // try to extract the library version from its name
         const size_t posExt = path.rfind(_T(".so"));
@@ -325,21 +334,22 @@ wxDynamicLibraryDetailsArray wxDynamicLibrary::ListLoaded()
 
 #ifdef __LINUX__
     // examine /proc/self/maps to find out what is loaded in our address space
-    wxFFile file("/proc/self/maps");
+    wxFFile file(_T("/proc/self/maps"));
     if ( file.IsOpened() )
     {
         // details of the module currently being parsed
         wxString pathCur;
-        unsigned long startCur,
-                      endCur;
+        void *startCur = NULL,
+             *endCur = NULL;
 
         char path[1024];
         char buf[1024];
         while ( fgets(buf, WXSIZEOF(buf), file.fp()) )
         {
-            // format is: start-end perm something? maj:min inode path
-            unsigned long start, end;
-            switch ( sscanf(buf, "%08lx-%08lx %*4s %*08x %*02d:%*02d %*d %1024s\n",
+            // format is: "start-end perm offset maj:min inode path", see proc(5)
+            void *start,
+                 *end;
+            switch ( sscanf(buf, "%p-%p %*4s %*p %*02x:%*02x %*d %1024s\n",
                             &start, &end, path) )
             {
                 case 2:
@@ -359,6 +369,9 @@ wxDynamicLibraryDetailsArray wxDynamicLibrary::ListLoaded()
                     continue;
             }
 
+            wxASSERT_MSG( start >= endCur,
+                          _T("overlapping regions in /proc/self/maps?") );
+
             wxString pathNew = wxString::FromAscii(path);
             if ( pathCur.empty() )
             {
@@ -367,10 +380,9 @@ wxDynamicLibraryDetailsArray wxDynamicLibrary::ListLoaded()
                 startCur = start;
                 endCur = end;
             }
-            else if ( pathCur == pathNew )
+            else if ( pathCur == pathNew && endCur == end )
             {
-                // continuation of the same module
-                wxASSERT_MSG( start == endCur, _T("hole in /proc/self/maps?") );
+                // continuation of the same module in the address space
                 endCur = end;
             }
             else // end of the current module