dbghelp: Introduce loader_ops to abstract platform-specific loader and use it to…

dlls/dbghelp/dbghelp.c

@@ -334,6 +334,7 @@ BOOL WINAPI SymInitializeW(HANDLE hProcess, PCWSTR UserSearchPath, BOOL fInvadeP
 
     pcs->handle = hProcess;
     pcs->is_64bit = (sizeof(void *) == 8 || wow64) && !child_wow64;
+    pcs->loader = &no_loader_ops; /* platform-specific initialization will override it if loader debug info can be found */
 
     if (UserSearchPath)
     {
@@ -379,8 +380,7 @@ BOOL WINAPI SymInitializeW(HANDLE hProcess, PCWSTR UserSearchPath, BOOL fInvadeP
     {
         if (fInvadeProcess)
             EnumerateLoadedModulesW64(hProcess, process_invade_cb, hProcess);
-        elf_synchronize_module_list(pcs);
-        macho_synchronize_module_list(pcs);
+        pcs->loader->synchronize_module_list(pcs);
     }
     else if (fInvadeProcess)
     {

dlls/dbghelp/dbghelp_private.h

@@ -387,10 +387,16 @@ struct module
     struct wine_rb_tree         sources_offsets_tree;
 };
 
+struct loader_ops
+{
+    BOOL (*synchronize_module_list)(struct process* process);
+};
+
 struct process 
 {
     struct process*             next;
     HANDLE                      handle;
+    const struct loader_ops*    loader;
     WCHAR*                      search_path;
 
     PSYMBOL_REGISTERED_CALLBACK64       reg_cb;
@@ -601,7 +607,6 @@ extern BOOL         elf_load_debug_info(struct module* module) DECLSPEC_HIDDEN;
 extern struct module*
                     elf_load_module(struct process* pcs, const WCHAR* name, unsigned long) DECLSPEC_HIDDEN;
 extern BOOL         elf_read_wine_loader_dbg_info(struct process* pcs) DECLSPEC_HIDDEN;
-extern BOOL         elf_synchronize_module_list(struct process* pcs) DECLSPEC_HIDDEN;
 struct elf_thunk_area;
 extern int          elf_is_in_thunk_area(unsigned long addr, const struct elf_thunk_area* thunks) DECLSPEC_HIDDEN;
 
@@ -612,7 +617,6 @@ extern BOOL         macho_load_debug_info(struct process *pcs, struct module* mo
 extern struct module*
                     macho_load_module(struct process* pcs, const WCHAR* name, unsigned long) DECLSPEC_HIDDEN;
 extern BOOL         macho_read_wine_loader_dbg_info(struct process* pcs) DECLSPEC_HIDDEN;
-extern BOOL         macho_synchronize_module_list(struct process* pcs) DECLSPEC_HIDDEN;
 
 /* minidump.c */
 void minidump_add_memory_block(struct dump_context* dc, ULONG64 base, ULONG size, ULONG rva) DECLSPEC_HIDDEN;
@@ -621,6 +625,7 @@ void minidump_add_memory_block(struct dump_context* dc, ULONG64 base, ULONG size
 extern const WCHAR      S_ElfW[] DECLSPEC_HIDDEN;
 extern const WCHAR      S_WineLoaderW[] DECLSPEC_HIDDEN;
 extern const WCHAR      S_SlashW[] DECLSPEC_HIDDEN;
+extern const struct loader_ops no_loader_ops DECLSPEC_HIDDEN;
 
 extern struct module*
                     module_find_by_addr(const struct process* pcs, DWORD64 addr,

dlls/dbghelp/elf_module.c

@@ -1623,7 +1623,7 @@ struct module*  elf_load_module(struct process* pcs, const WCHAR* name, unsigned
  * - if a module is in debuggee and not in pcs, it's loaded into pcs
  * - if a module is in pcs and not in debuggee, it's unloaded from pcs
  */
-BOOL	elf_synchronize_module_list(struct process* pcs)
+static BOOL elf_synchronize_module_list(struct process* pcs)
 {
     struct module*      module;
     struct elf_load     el;
@@ -1704,6 +1704,11 @@ static BOOL elf_search_loader(struct process* pcs, struct elf_info* elf_info)
     return ret;
 }
 
+static const struct loader_ops elf_loader_ops =
+{
+    elf_synchronize_module_list,
+};
+
 /******************************************************************
  *		elf_read_wine_loader_dbg_info
  *
@@ -1714,10 +1719,12 @@ BOOL elf_read_wine_loader_dbg_info(struct process* pcs)
     struct elf_info     elf_info;
 
     elf_info.flags = ELF_INFO_DEBUG_HEADER | ELF_INFO_MODULE;
-    if (!elf_search_loader(pcs, &elf_info)) return FALSE;
+    if (!elf_search_loader(pcs, &elf_info) || !elf_info.dbg_hdr_addr) return FALSE;
     elf_info.module->format_info[DFI_ELF]->u.elf_info->elf_loader = 1;
     module_set_module(elf_info.module, S_WineLoaderW);
-    return (pcs->dbg_hdr_addr = elf_info.dbg_hdr_addr) != 0;
+    pcs->dbg_hdr_addr = elf_info.dbg_hdr_addr;
+    pcs->loader = &elf_loader_ops;
+    return TRUE;
 }
 
 #else	/* !__ELF__ */
@@ -1727,11 +1734,6 @@ BOOL elf_map_handle(HANDLE handle, struct image_file_map* fmap)
     return FALSE;
 }
 
-BOOL	elf_synchronize_module_list(struct process* pcs)
-{
-    return FALSE;
-}
-
 BOOL elf_fetch_file_info(const WCHAR* name, DWORD_PTR* base,
                          DWORD* size, DWORD* checksum)
 {

dlls/dbghelp/macho_module.c

@@ -1694,7 +1694,7 @@ static BOOL macho_enum_sync_cb(const WCHAR* name, unsigned long addr, void* user
  * - if a module is in debuggee and not in pcs, it's loaded into pcs
  * - if a module is in pcs and not in debuggee, it's unloaded from pcs
  */
-BOOL    macho_synchronize_module_list(struct process* pcs)
+static BOOL macho_synchronize_module_list(struct process* pcs)
 {
     struct module*      module;
     struct macho_sync     ms;
@@ -1908,6 +1908,11 @@ static BOOL macho_search_loader(struct process* pcs, struct macho_info* macho_in
     return ret;
 }
 
+static const struct loader_ops macho_loader_ops =
+{
+    macho_synchronize_module_list,
+};
+
 /******************************************************************
  *              macho_read_wine_loader_dbg_info
  *
@@ -1919,19 +1924,16 @@ BOOL macho_read_wine_loader_dbg_info(struct process* pcs)
 
     TRACE("(%p/%p)\n", pcs, pcs->handle);
     macho_info.flags = MACHO_INFO_DEBUG_HEADER | MACHO_INFO_MODULE;
-    if (!macho_search_loader(pcs, &macho_info)) return FALSE;
+    if (!macho_search_loader(pcs, &macho_info) || !macho_info.dbg_hdr_addr) return FALSE;
     macho_info.module->format_info[DFI_MACHO]->u.macho_info->is_loader = 1;
     module_set_module(macho_info.module, S_WineLoaderW);
-    return (pcs->dbg_hdr_addr = macho_info.dbg_hdr_addr) != 0;
+    pcs->dbg_hdr_addr = macho_info.dbg_hdr_addr;
+    pcs->loader = &macho_loader_ops;
+    return TRUE;
 }
 
 #else  /* HAVE_MACH_O_LOADER_H */
 
-BOOL    macho_synchronize_module_list(struct process* pcs)
-{
-    return FALSE;
-}
-
 BOOL macho_fetch_file_info(HANDLE process, const WCHAR* name, unsigned long load_addr, DWORD_PTR* base,
                            DWORD* size, DWORD* checksum)
 {

dlls/dbghelp/module.c

@@ -529,15 +529,6 @@ enum module_type module_get_type_by_name(const WCHAR* name)
     return DMT_PE;
 }
 
-/******************************************************************
- *		                refresh_module_list
- */
-static BOOL refresh_module_list(struct process* pcs)
-{
-    /* force transparent ELF and Mach-O loading / unloading */
-    return elf_synchronize_module_list(pcs) || macho_synchronize_module_list(pcs);
-}
-
 static BOOL image_check_debug_link(const WCHAR* file, struct image_file_map* fmap, DWORD link_crc)
 {
     DWORD read_bytes;
@@ -875,7 +866,7 @@ DWORD64 WINAPI  SymLoadModuleExW(HANDLE hProcess, HANDLE hFile, PCWSTR wImageNam
     if (Flags & ~(SLMFLAG_VIRTUAL))
         FIXME("Unsupported Flags %08x for %s\n", Flags, debugstr_w(wImageName));
 
-    refresh_module_list(pcs);
+    pcs->loader->synchronize_module_list(pcs);
 
     /* this is a Wine extension to the API just to redo the synchronisation */
     if (!wImageName && !hFile) return 0;
@@ -1409,7 +1400,7 @@ BOOL WINAPI SymRefreshModuleList(HANDLE hProcess)
 
     if (!(pcs = process_find_by_handle(hProcess))) return FALSE;
 
-    return refresh_module_list(pcs);
+    return pcs->loader->synchronize_module_list(pcs);
 }
 
 /***********************************************************************
@@ -1434,3 +1425,13 @@ PVOID WINAPI SymFunctionTableAccess64(HANDLE hProcess, DWORD64 AddrBase)
 
     return dbghelp_current_cpu->find_runtime_function(module, AddrBase);
 }
+
+static BOOL native_synchronize_module_list(struct process* pcs)
+{
+    return FALSE;
+}
+
+const struct loader_ops no_loader_ops =
+{
+    native_synchronize_module_list,
+};