dbghelp: Search for debug files in module path too.

dlls/dbghelp/dbghelp_private.h

@@ -657,9 +657,9 @@ extern BOOL pdb_virtual_unwind(struct cpu_stack_walk *csw, DWORD_PTR ip,
     union ctx *context, struct pdb_cmd_pair *cpair) DECLSPEC_HIDDEN;
 
 /* path.c */
-extern BOOL         path_find_symbol_file(const struct process* pcs, PCSTR full_path,
-                                          const GUID* guid, DWORD dw1, DWORD dw2, PSTR buffer,
-                                          BOOL* is_unmatched) DECLSPEC_HIDDEN;
+extern BOOL         path_find_symbol_file(const struct process* pcs, const struct module* module,
+                                          PCSTR full_path, const GUID* guid, DWORD dw1, DWORD dw2,
+                                          PSTR buffer, BOOL* is_unmatched) DECLSPEC_HIDDEN;
 
 /* pe_module.c */
 extern BOOL         pe_load_nt_header(HANDLE hProc, DWORD64 base, IMAGE_NT_HEADERS* nth) DECLSPEC_HIDDEN;

dlls/dbghelp/msc.c

@@ -2450,11 +2450,11 @@ static HANDLE map_pdb_file(const struct process* pcs,
     switch (lookup->kind)
     {
     case PDB_JG:
-        ret = path_find_symbol_file(pcs, lookup->filename, NULL, lookup->timestamp,
+        ret = path_find_symbol_file(pcs, module, lookup->filename, NULL, lookup->timestamp,
                                     lookup->age, dbg_file_path, &module->module.PdbUnmatched);
         break;
     case PDB_DS:
-        ret = path_find_symbol_file(pcs, lookup->filename, &lookup->guid, 0,
+        ret = path_find_symbol_file(pcs, module, lookup->filename, &lookup->guid, 0,
                                     lookup->age, dbg_file_path, &module->module.PdbUnmatched);
         break;
     }

dlls/dbghelp/path.c

@@ -49,6 +49,15 @@ static inline const WCHAR* file_nameW(const WCHAR* str)
     return p + 1;
 }
 
+static inline void file_pathW(const WCHAR *src, WCHAR *dst)
+{
+    int len;
+
+    for (len = strlenW(src) - 1; (len > 0) && (!is_sepW(src[len])); len--);
+    memcpy( dst, src, len * sizeof(WCHAR) );
+    dst[len] = 0;
+}
+
 /******************************************************************
  *		FindDebugInfoFile (DBGHELP.@)
  *
@@ -612,9 +621,9 @@ static BOOL CALLBACK module_find_cb(PCWSTR buffer, PVOID user)
     return mf->matched == 2;
 }
 
-BOOL path_find_symbol_file(const struct process* pcs, PCSTR full_path,
-                           const GUID* guid, DWORD dw1, DWORD dw2, PSTR buffer,
-                           BOOL* is_unmatched)
+BOOL path_find_symbol_file(const struct process* pcs, const struct module* module,
+                           PCSTR full_path, const GUID* guid, DWORD dw1, DWORD dw2,
+                           PSTR buffer, BOOL* is_unmatched)
 {
     struct module_find  mf;
     WCHAR               full_pathW[MAX_PATH];
@@ -643,6 +652,23 @@ BOOL path_find_symbol_file(const struct process* pcs, PCSTR full_path,
         return TRUE;
     }
 
+    /* FIXME: Use Environment-Variables (see MS docs)
+                 _NT_SYMBOL_PATH and _NT_ALT_SYMBOL_PATH
+       FIXME: Implement "Standard Path Elements" (Path) ... (see MS docs)
+              do a search for (every?) path-element like this ...
+              <path>
+              <path>\dll
+              <path>\symbols\dll
+              (dll may be exe, or sys depending on the file extension)   */
+
+    /* 2. check module-path */
+    file_pathW(module->module.LoadedImageName, tmp);
+    if (do_searchW(filename, tmp, FALSE, module_find_cb, &mf))
+    {
+        WideCharToMultiByte(CP_ACP, 0, tmp, -1, buffer, MAX_PATH, NULL, NULL);
+        return TRUE;
+    }
+
     while (searchPath)
     {
         ptr = strchrW(searchPath, ';');

dlls/dbghelp/pe_module.c

@@ -531,7 +531,7 @@ static BOOL pe_load_dbg_file(const struct process* pcs, struct module* module,
 
     TRACE("Processing DBG file %s\n", debugstr_a(dbg_name));
 
-    if (path_find_symbol_file(pcs, dbg_name, NULL, timestamp, 0, tmp, &module->module.DbgUnmatched) &&
+    if (path_find_symbol_file(pcs, module, dbg_name, NULL, timestamp, 0, tmp, &module->module.DbgUnmatched) &&
         (hFile = CreateFileA(tmp, GENERIC_READ, FILE_SHARE_READ, NULL,
                              OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, NULL)) != INVALID_HANDLE_VALUE &&
         ((hMap = CreateFileMappingW(hFile, NULL, PAGE_READONLY, 0, 0, NULL)) != 0) &&