Eric Pouech : dbghelp: Handle the .
gnu_debuglink files with the newly added alternate mechanism.
Alexandre Julliard
julliard at wine.codeweavers.com
Mon Feb 26 07:59:39 CST 2007
Module: wine
Branch: master
Commit: e161dd92ee6b472df39fe9de3a705df7984cac2f
URL: http://source.winehq.org/git/wine.git/?a=commit;h=e161dd92ee6b472df39fe9de3a705df7984cac2f
Author: Eric Pouech <eric.pouech at wanadoo.fr>
Date: Sat Feb 24 21:01:15 2007 +0100
dbghelp: Handle the .gnu_debuglink files with the newly added alternate mechanism.
---
dlls/dbghelp/elf_module.c | 118 +++++++++++++++++++-------------------------
1 files changed, 51 insertions(+), 67 deletions(-)
diff --git a/dlls/dbghelp/elf_module.c b/dlls/dbghelp/elf_module.c
index 4d15cb3..4b67ee1 100644
--- a/dlls/dbghelp/elf_module.c
+++ b/dlls/dbghelp/elf_module.c
@@ -112,8 +112,6 @@ struct elf_file_map
const char* mapped;
}* sect;
int fd;
- unsigned with_crc;
- unsigned long crc;
const char* shstrtab;
struct elf_file_map* alternate; /* another ELF file (linked to this one) */
};
@@ -266,7 +264,6 @@ static BOOL elf_map_file(const WCHAR* filenameW, struct elf_file_map* fmap)
WideCharToMultiByte(CP_UNIXCP, 0, filenameW, -1, filename, len, NULL, NULL);
fmap->fd = -1;
- fmap->with_crc = 0;
fmap->shstrtab = ELF_NO_MAP;
fmap->alternate = NULL;
@@ -856,10 +853,18 @@ static DWORD calc_crc32(struct elf_file_map* fmap)
#undef UPDC32
}
-static BOOL elf_load_debug_info_from_map(struct module* module,
- struct elf_file_map* fmap,
- struct pool* pool,
- struct hash_table* ht_symtab);
+static BOOL elf_check_debug_link(const WCHAR* file, struct elf_file_map* fmap, DWORD crc)
+{
+ BOOL ret;
+ if (!elf_map_file(file, fmap)) return FALSE;
+ if (!(ret = crc == calc_crc32(fmap)))
+ {
+ WARN("Bad CRC for file %s (got %08x while expecting %08x)\n",
+ debugstr_w(file), calc_crc32(fmap), crc);
+ elf_unmap_file(fmap);
+ }
+ return ret;
+}
/******************************************************************
* elf_locate_debug_link
@@ -880,20 +885,24 @@ static BOOL elf_load_debug_info_from_map(struct module* module,
* is the global debug file directory, and execdir has been turned
* into a relative path)." (from GDB manual)
*/
-static WCHAR* elf_locate_debug_link(const char* filename, const WCHAR* loaded_file,
- struct elf_file_map* fmap_link)
+static BOOL elf_locate_debug_link(struct elf_file_map* fmap, const char* filename,
+ const WCHAR* loaded_file, DWORD crc)
{
static const WCHAR globalDebugDirW[] = {'/','u','s','r','/','l','i','b','/','d','e','b','u','g','/'};
static const WCHAR dotDebugW[] = {'.','d','e','b','u','g','/'};
const size_t globalDebugDirLen = sizeof(globalDebugDirW) / sizeof(WCHAR);
size_t filename_len;
- WCHAR* p;
+ WCHAR* p = NULL;
WCHAR* slash;
+ struct elf_file_map* fmap_link = NULL;
+
+ fmap_link = HeapAlloc(GetProcessHeap(), 0, sizeof(*fmap_link));
+ if (!fmap_link) return FALSE;
filename_len = MultiByteToWideChar(CP_UNIXCP, 0, filename, -1, NULL, 0);
p = HeapAlloc(GetProcessHeap(), 0,
(globalDebugDirLen + strlenW(loaded_file) + 6 + 1 + filename_len + 1) * sizeof(WCHAR));
- if (!p) return FALSE;
+ if (!p) goto found;
/* we prebuild the string with "execdir" */
strcpyW(p, loaded_file);
@@ -902,33 +911,34 @@ static WCHAR* elf_locate_debug_link(const char* filename, const WCHAR* loaded_fi
/* testing execdir/filename */
MultiByteToWideChar(CP_UNIXCP, 0, filename, -1, slash, filename_len);
- if (elf_map_file(p, fmap_link)) goto found;
-
- HeapValidate(GetProcessHeap(), 0, 0);
+ if (elf_check_debug_link(p, fmap_link, crc)) goto found;
/* testing execdir/.debug/filename */
memcpy(slash, dotDebugW, sizeof(dotDebugW));
MultiByteToWideChar(CP_UNIXCP, 0, filename, -1, slash + sizeof(dotDebugW) / sizeof(WCHAR), filename_len);
- if (elf_map_file(p, fmap_link)) goto found;
+ if (elf_check_debug_link(p, fmap_link, crc)) goto found;
/* testing globaldebugdir/execdir/filename */
memmove(p + globalDebugDirLen, p, (slash - p) * sizeof(WCHAR));
memcpy(p, globalDebugDirW, globalDebugDirLen * sizeof(WCHAR));
slash += globalDebugDirLen;
MultiByteToWideChar(CP_UNIXCP, 0, filename, -1, slash, filename_len);
- if (elf_map_file(p, fmap_link)) goto found;
+ if (elf_check_debug_link(p, fmap_link, crc)) goto found;
/* finally testing filename */
- if (elf_map_file(slash, fmap_link)) goto found;
+ if (elf_check_debug_link(slash, fmap_link, crc)) goto found;
- HeapFree(GetProcessHeap(), 0, p);
WARN("Couldn't locate or map %s\n", filename);
- return NULL;
+ HeapFree(GetProcessHeap(), 0, p);
+ HeapFree(GetProcessHeap(), 0, fmap_link);
+ return FALSE;
found:
TRACE("Located debug information file %s at %s\n", filename, debugstr_w(p));
- return p;
+ HeapFree(GetProcessHeap(), 0, p);
+ fmap->alternate = fmap_link;
+ return TRUE;
}
/******************************************************************
@@ -937,10 +947,8 @@ found:
* Parses a .gnu_debuglink section and loads the debug info from
* the external file specified there.
*/
-static BOOL elf_debuglink_parse (struct module* module,
- struct pool* pool,
- struct hash_table* ht_symtab,
- const BYTE* debuglink)
+static BOOL elf_debuglink_parse(struct elf_file_map* fmap, struct module* module,
+ const BYTE* debuglink)
{
/* The content of a debug link section is:
* 1/ a NULL terminated string, containing the file name for the
@@ -948,28 +956,11 @@ static BOOL elf_debuglink_parse (struct module* module,
* 2/ padding on 4 byte boundary
* 3/ CRC of the linked ELF file
*/
- BOOL ret = FALSE;
const char* dbg_link = (char*)debuglink;
- struct elf_file_map fmap_link;
- WCHAR* link_file;
+ DWORD crc;
- link_file = elf_locate_debug_link(dbg_link, module->module.LoadedImageName, &fmap_link);
-
- if (link_file)
- {
- fmap_link.crc = *(const DWORD*)(dbg_link + ((DWORD_PTR)(strlen(dbg_link) + 4) & ~3));
- fmap_link.with_crc = 1;
- ret = elf_load_debug_info_from_map(module, &fmap_link, pool,
- ht_symtab);
- if (ret)
- strcpyW(module->module.LoadedPdbName,link_file);
- else
- WARN("Couldn't load debug information from %s\n", debugstr_w(link_file));
- elf_unmap_file(&fmap_link);
- HeapFree(GetProcessHeap(), 0, link_file);
- }
-
- return ret;
+ crc = *(const DWORD*)(dbg_link + ((DWORD_PTR)(strlen(dbg_link) + 4) & ~3));
+ return elf_locate_debug_link(fmap, dbg_link, module->module.LoadedImageName, crc);
}
/******************************************************************
@@ -1002,14 +993,6 @@ static BOOL elf_load_debug_info_from_map(struct module* module,
{NULL, 0, 0, 0}
};
- if (fmap->with_crc && (fmap->crc != calc_crc32(fmap)))
- {
- ERR("Bad CRC for module %s (got %08x while expecting %08lx)\n",
- debugstr_w(module->module.LoadedImageName), calc_crc32(fmap), fmap->crc);
- /* we don't tolerate mis-matched files */
- return FALSE;
- }
-
module->module.SymType = SymExport;
/* create a hash table for the symtab */
@@ -1022,6 +1005,22 @@ static BOOL elf_load_debug_info_from_map(struct module* module,
debug_line_sect, debug_loclist_sect;
struct elf_section_map debuglink_sect;
+ /* if present, add the .gnu_debuglink file as an alternate to current one */
+ if (elf_find_section(fmap, ".gnu_debuglink", SHT_NULL, &debuglink_sect))
+ {
+ const BYTE* dbg_link;
+
+ dbg_link = (const BYTE*)elf_map_section(&debuglink_sect);
+ if (dbg_link != ELF_NO_MAP)
+ {
+ lret = elf_debuglink_parse(fmap, module, dbg_link);
+ if (!lret)
+ WARN("Couldn't load linked debug file for %s\n",
+ debugstr_w(module->module.ModuleName));
+ ret = ret || lret;
+ }
+ elf_unmap_section(&debuglink_sect);
+ }
if (elf_find_section(fmap, ".stab", SHT_NULL, &stab_sect) &&
elf_find_section(fmap, ".stabstr", SHT_NULL, &stabstr_sect))
{
@@ -1088,21 +1087,6 @@ static BOOL elf_load_debug_info_from_map(struct module* module,
elf_unmap_section(&debug_line_sect);
elf_unmap_section(&debug_loclist_sect);
}
- if (elf_find_section(fmap, ".gnu_debuglink", SHT_NULL, &debuglink_sect))
- {
- const BYTE* dbg_link;
-
- dbg_link = (const BYTE*)elf_map_section(&debuglink_sect);
- if (dbg_link != ELF_NO_MAP)
- {
- lret = elf_debuglink_parse(module, pool, ht_symtab, dbg_link);
- if (!lret)
- WARN("Couldn't load linked debug file for %s\n",
- debugstr_w(module->module.ModuleName));
- ret = ret || lret;
- }
- elf_unmap_section(&debuglink_sect);
- }
}
if (strstrW(module->module.ModuleName, S_ElfW) ||
!strcmpW(module->module.ModuleName, S_WineLoaderW))
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