static bool
IsH264DecoderBlacklisted()
{
#ifdef BLACKLIST_CRASHY_H264_DECODERS
WCHAR systemPath[MAX_PATH + 1];
if (!ConstructSystem32Path(L"msmpeg2vdec.dll", systemPath, MAX_PATH + 1)) {
// Cannot build path -> Assume it's not the blacklisted DLL.
return false;
}
DWORD zero;
DWORD infoSize = GetFileVersionInfoSizeW(systemPath, &zero);
if (infoSize == 0) {
// Can't get file info -> Assume we don't have the blacklisted DLL.
return false;
}
auto infoData = MakeUnique<unsigned char[]>(infoSize);
VS_FIXEDFILEINFO *vInfo;
UINT vInfoLen;
if (GetFileVersionInfoW(systemPath, 0, infoSize, infoData.get()) &&
VerQueryValueW(infoData.get(), L"\\", (LPVOID*)&vInfo, &vInfoLen))
{
if ((vInfo->dwFileVersionMS == ((12u << 16) | 0u))
&& ((vInfo->dwFileVersionLS == ((9200u << 16) | 16426u))
|| (vInfo->dwFileVersionLS == ((9200u << 16) | 17037u)))) {
// 12.0.9200.16426 & .17037 are blacklisted on Win64, see bug 1242343.
return true;
}
}
#endif // BLACKLIST_CRASHY_H264_DECODERS
return false;
}
// If a blacklisted DLL is found, return its information, otherwise "".
static const nsACString&
FindDXVABlacklistedDLL(StaticAutoPtr<D3DDLLBlacklistingCache>& aDLLBlacklistingCache,
const char* aDLLBlacklistPrefName)
{
NS_ASSERTION(NS_IsMainThread(), "Must be on main thread.");
if (!aDLLBlacklistingCache) {
// First time here, create persistent data that will be reused in all
// D3D11-blacklisting checks.
aDLLBlacklistingCache = new D3DDLLBlacklistingCache();
ClearOnShutdown(&aDLLBlacklistingCache);
}
nsAdoptingCString blacklist = Preferences::GetCString(aDLLBlacklistPrefName);
if (blacklist.IsEmpty()) {
// Empty blacklist -> No blacklisting.
aDLLBlacklistingCache->mBlacklistPref.SetLength(0);
aDLLBlacklistingCache->mBlacklistedDLL.SetLength(0);
return aDLLBlacklistingCache->mBlacklistedDLL;
}
// Detect changes in pref.
if (aDLLBlacklistingCache->mBlacklistPref.Equals(blacklist)) {
// Same blacklist -> Return same result (i.e., don't check DLLs again).
return aDLLBlacklistingCache->mBlacklistedDLL;
}
// Adopt new pref now, so we don't work on it again.
aDLLBlacklistingCache->mBlacklistPref = blacklist;
// media.wmf.disable-d3d*-for-dlls format: (whitespace is trimmed)
// "dll1.dll: 1.2.3.4[, more versions...][; more dlls...]"
nsTArray<nsCString> dlls;
SplitAt(";", blacklist, dlls);
for (const auto& dll : dlls) {
nsTArray<nsCString> nameAndVersions;
SplitAt(":", dll, nameAndVersions);
if (nameAndVersions.Length() != 2) {
NS_WARNING(nsPrintfCString("Skipping incorrect '%s' dll:versions format",
aDLLBlacklistPrefName).get());
continue;
}
nameAndVersions[0].CompressWhitespace();
NS_ConvertUTF8toUTF16 name(nameAndVersions[0]);
WCHAR systemPath[MAX_PATH + 1];
if (!ConstructSystem32Path(name.get(), systemPath, MAX_PATH + 1)) {
// Cannot build path -> Assume it's not the blacklisted DLL.
continue;
}
DWORD zero;
DWORD infoSize = GetFileVersionInfoSizeW(systemPath, &zero);
if (infoSize == 0) {
// Can't get file info -> Assume we don't have the blacklisted DLL.
continue;
}
// vInfo is a pointer into infoData, that's why we keep it outside of the loop.
auto infoData = MakeUnique<unsigned char[]>(infoSize);
VS_FIXEDFILEINFO *vInfo;
UINT vInfoLen;
if (!GetFileVersionInfoW(systemPath, 0, infoSize, infoData.get())
|| !VerQueryValueW(infoData.get(), L"\\", (LPVOID*)&vInfo, &vInfoLen)
|| !vInfo) {
// Can't find version -> Assume it's not blacklisted.
continue;
}
nsTArray<nsCString> versions;
SplitAt(",", nameAndVersions[1], versions);
for (const auto& version : versions) {
nsTArray<nsCString> numberStrings;
SplitAt(".", version, numberStrings);
if (numberStrings.Length() != 4) {
NS_WARNING(nsPrintfCString("Skipping incorrect '%s' a.b.c.d version format",
aDLLBlacklistPrefName).get());
continue;
}
DWORD numbers[4];
nsresult errorCode = NS_OK;
for (int i = 0; i < 4; ++i) {
numberStrings[i].CompressWhitespace();
numbers[i] = DWORD(numberStrings[i].ToInteger(&errorCode));
if (NS_FAILED(errorCode)) {
break;
}
if (numbers[i] > UINT16_MAX) {
errorCode = NS_ERROR_FAILURE;
break;
}
}
if (NS_FAILED(errorCode)) {
NS_WARNING(nsPrintfCString("Skipping incorrect '%s' a.b.c.d version format",
aDLLBlacklistPrefName).get());
continue;
}
if (vInfo->dwFileVersionMS == ((numbers[0] << 16) | numbers[1])
&& vInfo->dwFileVersionLS == ((numbers[2] << 16) | numbers[3])) {
// Blacklisted! Record bad DLL.
aDLLBlacklistingCache->mBlacklistedDLL.SetLength(0);
aDLLBlacklistingCache->mBlacklistedDLL.AppendPrintf(
"%s (%lu.%lu.%lu.%lu)",
nameAndVersions[0].get(), numbers[0], numbers[1], numbers[2], numbers[3]);
return aDLLBlacklistingCache->mBlacklistedDLL;
}
}
}
// No blacklisted DLL.
aDLLBlacklistingCache->mBlacklistedDLL.SetLength(0);
return aDLLBlacklistingCache->mBlacklistedDLL;
}
