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dbghelp: Simplify code for searching alternate debug info files. 

Signed-off-by: Eric Pouech <eric.pouech@gmail.com>
Signed-off-by: Alexandre Julliard <julliard@winehq.org>
This commit is contained in:
Eric Pouech 2021-11-22 15:21:07 +01:00 committed by Alexandre Julliard
parent 789512beee
commit 9f1766193e
1 changed files with 32 additions and 41 deletions
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73
dlls/dbghelp/module.c
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@ -634,6 +634,17 @@ found:
return TRUE;
}
static WCHAR* append_hex(WCHAR* dst, const BYTE* id, const BYTE* end)
{
while (id < end)
{
*dst++ = "0123456789abcdef"[*id >> 4 ];
*dst++ = "0123456789abcdef"[*id & 0x0F];
id++;
}
return dst;
}
/******************************************************************
* image_load_debugaltlink
*
@ -683,16 +694,14 @@ struct image_file_map* image_load_debugaltlink(struct image_file_map* fmap, stru
if (dst)
{
MultiByteToWideChar(CP_UNIXCP, 0, data, -1, dst, filename_len);
ret = image_check_debug_link_gnu_id(dst, fmap_link, id, data + sect_len - (const char*)id);
ret = image_check_debug_link_gnu_id(dst, fmap_link, id, idlen);
HeapFree(GetProcessHeap(), 0, dst);
}
/* Trying relative path to build-id directory */
if (!ret)
{
static const WCHAR globalDebugDirW[] =
{'/','u','s','r','/','l','i','b','/','d','e','b','u','g','/','.','b','u','i','l','d','-','i','d','/'};
dst = HeapAlloc(GetProcessHeap(), 0,
sizeof(globalDebugDirW) + (3 + filename_len + idlen * 2) * sizeof(WCHAR));
sizeof(L"/usr/lib/debug/.build-id/") + (3 + filename_len + idlen * 2) * sizeof(WCHAR));
if (dst)
{
WCHAR* p;
@ -702,21 +711,16 @@ struct image_file_map* image_load_debugaltlink(struct image_file_map* fmap, stru
* where the alternate file is...
* so try both
*/
p = memcpy(dst, globalDebugDirW, sizeof(globalDebugDirW));
p += ARRAY_SIZE(globalDebugDirW);
p = memcpy(dst, L"/usr/lib/debug/.build-id/", sizeof(L"/usr/lib/debug/.build-id/"));
p += wcslen(dst);
MultiByteToWideChar(CP_UNIXCP, 0, data, -1, p, filename_len);
ret = image_check_debug_link_gnu_id(dst, fmap_link, id, data + sect_len - (const char*)id);
ret = image_check_debug_link_gnu_id(dst, fmap_link, id, idlen);
if (!ret)
{
p = dst + ARRAY_SIZE(globalDebugDirW);
if ((const char*)id < data + sect_len)
{
*p++ = "0123456789abcdef"[*id >> 4 ];
*p++ = "0123456789abcdef"[*id & 0x0F];
}
p = append_hex(p, id, id + idlen);
*p++ = '/';
MultiByteToWideChar(CP_UNIXCP, 0, data, -1, p, filename_len);
ret = image_check_debug_link_gnu_id(dst, fmap_link, id, data + sect_len - (const char*)id);
ret = image_check_debug_link_gnu_id(dst, fmap_link, id, idlen);
}
HeapFree(GetProcessHeap(), 0, dst);
}
@ -742,51 +746,38 @@ struct image_file_map* image_load_debugaltlink(struct image_file_map* fmap, stru
*/
static BOOL image_locate_build_id_target(struct image_file_map* fmap, const BYTE* id, unsigned idlen)
{
static const WCHAR globalDebugDirW[] = {'/','u','s','r','/','l','i','b','/','d','e','b','u','g','/'};
static const WCHAR buildidW[] = {'.','b','u','i','l','d','-','i','d','/'};
struct image_file_map* fmap_link = NULL;
WCHAR* p;
WCHAR* z;
const BYTE* idend = id + idlen;
fmap_link = HeapAlloc(GetProcessHeap(), 0, sizeof(*fmap_link));
if (!fmap_link) return FALSE;
p = HeapAlloc(GetProcessHeap(), 0,
sizeof(globalDebugDirW) + sizeof(buildidW) +
(idlen * 2 + 1) * sizeof(WCHAR) + sizeof(L".debug"));
z = p;
memcpy(z, globalDebugDirW, sizeof(globalDebugDirW));
z += ARRAY_SIZE(globalDebugDirW);
memcpy(z, buildidW, sizeof(buildidW));
z += ARRAY_SIZE(buildidW);
if (id < idend)
p = malloc(sizeof(L"/usr/lib/debug/.build-id/") +
(idlen * 2 + 1) * sizeof(WCHAR) + sizeof(L".debug"));
wcscpy(p, L"/usr/lib/debug/.build-id/");
z = p + wcslen(p);
if (idlen)
{
*z++ = "0123456789abcdef"[*id >> 4 ];
*z++ = "0123456789abcdef"[*id & 0x0F];
id++;
}
if (id < idend)
*z++ = '/';
while (id < idend)
{
*z++ = "0123456789abcdef"[*id >> 4 ];
*z++ = "0123456789abcdef"[*id & 0x0F];
id++;
z = append_hex(z, id, id + 1);
if (idlen > 1)
{
*z++ = L'/';
z = append_hex(z, id + 1, id + idlen);
}
}
memcpy(z, L".debug", sizeof(L".debug"));
TRACE("checking %s\n", wine_dbgstr_w(p));
if (image_check_debug_link_gnu_id(p, fmap_link, idend - idlen, idlen))
if (image_check_debug_link_gnu_id(p, fmap_link, id, idlen))
{
HeapFree(GetProcessHeap(), 0, p);
free(p);
fmap->alternate = fmap_link;
return TRUE;
}
TRACE("not found\n");
HeapFree(GetProcessHeap(), 0, p);
free(p);
HeapFree(GetProcessHeap(), 0, fmap_link);
return FALSE;
}