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dbghelp: Handle the .gnu_debuglink files with the newly added alternate mechanism.

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Eric Pouech 2007-02-24 21:01:15 +01:00 committed by Alexandre Julliard
parent fc66bb37f4
commit e161dd92ee
1 changed files with 51 additions and 67 deletions
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118
dlls/dbghelp/elf_module.c
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@ -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))