[PATCH] dbghelp: Always return a dos path from SymGetLineFromAddr

[Alistair Leslie-Hughes]

Fixes: https://bugs.winehq.org/show_bug.cgi?id=34687

Bases off the information in MSDN. 

https://msdn.microsoft.com/en-us/library/windows/desktop/ms681330%28v=vs.85%29.aspx
"This function returns a pointer to a buffer that may be reused by another function. 
Therefore, be sure to copy the data returned to another buffer immediately."

Signed-off-by: Alistair Leslie-Hughes <leslie_alistair at hotmail.com>
---
 dlls/dbghelp/symbol.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/dlls/dbghelp/symbol.c b/dlls/dbghelp/symbol.c
index 08ea834..1638a1e 100644
--- a/dlls/dbghelp/symbol.c
+++ b/dlls/dbghelp/symbol.c
@@ -1435,9 +1435,11 @@ BOOL WINAPI SymGetSymFromName(HANDLE hProcess, PCSTR Name, PIMAGEHLP_SYMBOL Symb
 BOOL symt_fill_func_line_info(const struct module* module, const struct symt_function* func,
                               DWORD64 addr, IMAGEHLP_LINE64* line)
 {
+    static char path[MAX_PATH];
     struct line_info*   dli = NULL;
     BOOL                found = FALSE;
     int                 i;
+    WCHAR *dos_path;
 
     assert(func->symt.tag == SymTagFunction);
 
@@ -1455,7 +1457,10 @@ BOOL symt_fill_func_line_info(const struct module* module, const struct symt_fun
         }
         if (found)
         {
-            line->FileName = (char*)source_get(module, dli->u.source_file);
+            dos_path = wine_get_dos_file_name((char*)source_get(module, dli->u.source_file));
+            WideCharToMultiByte(CP_ACP, 0, dos_path, -1, path, MAX_PATH, NULL, NULL);
+            HeapFree( GetProcessHeap(), 0, dos_path );
+            line->FileName = path;
             return TRUE;
         }
     }
-- 
1.9.1