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dbghelp: Search for .gnu_debuglink file.

This commit is contained in:
Frank Richter 2007-01-17 00:26:27 +01:00 committed by Alexandre Julliard
parent 1ec14b0b25
commit 867ebe4da0
1 changed files with 59 additions and 3 deletions
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62
dlls/dbghelp/elf_module.c
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@ -783,6 +783,48 @@ static BOOL elf_load_debug_info_from_map(struct module* module,
struct pool* pool,
struct hash_table* ht_symtab);
/******************************************************************
* elf_locate_debug_link
*
* Locate a filename from a .gnu_debuglink section, using the same
* strategy as gdb:
* "If the full name of the directory containing the executable is
* execdir, and the executable has a debug link that specifies the
* name debugfile, then GDB will automatically search for the
* debugging information file in three places:
* - the directory containing the executable file (that is, it
* will look for a file named `execdir/debugfile',
* - a subdirectory of that directory named `.debug' (that is, the
* file `execdir/.debug/debugfile', and
* - a subdirectory of the global debug file directory that includes
* the executable's full path, and the name from the link (that is,
* the file `globaldebugdir/execdir/debugfile', where globaldebugdir
* is the global debug file directory, and execdir has been turned
* into a relative path)." (from GDB manual)
*/
static char* elf_locate_debug_link (const char* filename, const char* moduleDir)
{
static const char globalDebugDir[] = "/usr/lib/debug";
const size_t moduleDirLen = strlen (moduleDir);
const size_t globalDebugDirLen = strlen (globalDebugDir);
struct stat statbuf;
char* p = HeapAlloc (GetProcessHeap(), 0,
moduleDirLen + 1 + max (6, globalDebugDirLen) + 1 + strlen (filename)+1);
sprintf (p, "%s/%s", moduleDir, filename);
if (stat(p, &statbuf) != -1 && !S_ISDIR(statbuf.st_mode)) return p;
sprintf (p, "%s/.debug/%s", moduleDir, filename);
if (stat(p, &statbuf) != -1 && !S_ISDIR(statbuf.st_mode)) return p;
sprintf (p, "%s/%s/%s", globalDebugDir, moduleDir, filename);
if (stat(p, &statbuf) != -1 && !S_ISDIR(statbuf.st_mode)) return p;
strcpy (p, filename);
return p;
}
/******************************************************************
* elf_debuglink_parse
*
@ -803,22 +845,36 @@ static BOOL elf_debuglink_parse (struct module* module,
BOOL ret = FALSE;
const char* dbg_link = (char*)debuglink;
struct elf_file_map fmap_link;
char* moduleDir;
char* link_file;
char* slash;
if (elf_map_file(dbg_link, &fmap_link))
moduleDir = HeapAlloc (GetProcessHeap(), 0, strlen (module->module.LoadedImageName) + 1);
strcpy (moduleDir, module->module.LoadedImageName);
slash = strrchr (moduleDir, '/');
if (slash != 0) *slash = 0;
link_file = elf_locate_debug_link (dbg_link, moduleDir);
TRACE("Located debug information file %s at %s\n", dbg_link, link_file);
if (elf_map_file(link_file, &fmap_link))
{
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)
strcpy(module->module.LoadedPdbName, dbg_link);
strcpy(module->module.LoadedPdbName, link_file);
else
WARN("Couldn't load debug information from %s\n", dbg_link);
WARN("Couldn't load debug information from %s\n", link_file);
elf_unmap_file(&fmap_link);
}
else
WARN("Couldn't map %s\n", dbg_link);
HeapFree (GetProcessHeap(), 0, link_file);
HeapFree (GetProcessHeap(), 0, moduleDir);
return ret;
}